CA2018216C - Liquid atomizing apparatus for aerial spraying - Google Patents
Liquid atomizing apparatus for aerial sprayingInfo
- Publication number
- CA2018216C CA2018216C CA002018216A CA2018216A CA2018216C CA 2018216 C CA2018216 C CA 2018216C CA 002018216 A CA002018216 A CA 002018216A CA 2018216 A CA2018216 A CA 2018216A CA 2018216 C CA2018216 C CA 2018216C
- Authority
- CA
- Canada
- Prior art keywords
- speed
- generator
- motor
- variable speed
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D1/00—Dropping, ejecting, releasing, or receiving articles, liquids, or the like, in flight
- B64D1/16—Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting
- B64D1/18—Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting by spraying, e.g. insecticides
Abstract
A rotary liquid spray atomizer for aerial spraying is driven by a variable speed motor, driven in turn by power from a variable speed AC generator. The generator is driven from a power take-off from the engine of the spraying aircraft, drive means including means for controlling the speed of the generator relative to the speed of the engine. The particularly convenient drive means between the generator and the power take-off is a hydraulic motor, which drives the generator, driven by a hydraulic pump driven from the power take-off. The speed of the hydraulic motor can be controllably varied.
Conveniently, the AC motor is a synchronous motor.
Conveniently, the AC motor is a synchronous motor.
Description
LIOUID ATOMIZING APPARATUS FOR ~T'RT~T. SPRAYING
BACRGROUND OF THE lNv~h-~ION
This invention relates to a liquid atomizing apparatus for aerial spraying, and in particular, relates to the provision of apparatus which will give a liquid or solid-in-liquid suspension spray having predetermined characteristics independent of the speed of the aircraft carrying out the spraying.
In a conventional spray system, a series of rotatable baskets are assembled on a wing of the aircraft. In this system, each basket is rotated by a propeller which is rotated by the passage of the aircraft through the air. The liquid to be sprayed is fed into the baskets. The baskets are perforated and the fluid is emitted centrifugally through the perforations. The droplet size is very dependent on the speed of rotation of the basket.
With the speed of rotation of the basket being determined by plane speed, the droplet size is determined. When the plane varies speed, for example, slowing down to turn round or in another manoeuvre, the droplet size increases. This is inefficient in that more liquid is required to cover an area with large drops rather than with small drops, since it has been determined that a range of drop sizes between 15 microns and 55 microns is most desirable for aerial spraying of coniferous tree foliage.
A further disadvantage is the drag occasioned by the propellers for the atomizing devices, increasing fuel consumption.
~k BRIEF SUM~ARY OF THE lNV~ LION
The present invention provides for the atomizers to be driven by an electric motor. DC motors have been used but require heavy current supply not readily available on many aircraft. In the present invention, the atomizers are driven by relatively high voltage AC motors, preferably synchronous motors, the power for which is supplied from an AC generator which is driven from a power take-off of an aircraft engine by a variable speed system. Preferably, the generator is lo driven by a hydraulic motor which is driven by a hydraulic pump, driven by a power take-off of an engine of the aircraft. A fluid control system is provided for controlling the speed of the hydraulic motor with the input of a frequency signal from a tachometer associated with at least one of the spraying units. This is then universally applicable to any aircraft with a power take-off attachment point.
In one broad concept, the invention provides a liquid atomizing apparatus for aerial spraying comprising a rotatable atomizer; a variable speed AC electric motor for driving the atomizer; an AC generator for producing electric power to drive the electric motor at a speed related to the speed of the generator; and variable speed drive means`for connection between the generator and a power take-off of an engine of an aircraft used for aerial spraying,-the drive means including means for controllably varying the speed of the generator relative to the speed of the engine.
In accordance with one embodiment of the present invention, there is provided a liquid atomizing apparatus which includes a variable speed hydraulic motor, pump means connected to the hydraulic motor, and E
~018~16 -control means positioned between the pump means and the hydraulic motor for controlling the flow of liquid from the pump means to the motor, and wherein there is included means for connecting the pump means to a power take-off of an engine of an aircraft used for aerial spraying.
In another embodiment, the apparatus includes means for feeding an output from the motor, indicative of the speed of the motor, to the control means.
In a still further embodiment, the apparatus comprises a plurality of atomizers, each driven by a variable speed synchronous AC motor, and means for connecting each AC motor to the generator.
In yet another embodiment of the present invention, the apparatus includes a hydraulic liquid reservoir; means connecting an outlet of the reservoir to an inlet of the pump means; a pipe connecting an outlet of the pump means to an inlet of the control means; a pipe connecting an outlet of the control means to an inlet of the hydraulic motor; and a pipe connecting an outlet of the pump means to an inlet of the reservoir.
In a still further embodiment, the apparatus includes bypass means extending between the control means and the reservoir.
In yet another embodiment, the reservoir, the pump means, the control means, the hydraulic motor and the generator are in the form of a unitary assembly.
In accordance with a particularly preferred embodiment of the present invention, a fluid atomizing apparatus for aerial spraying comprises: at least one rotatable liquid atomizer driven by a synchronous AC
electric motor; an AC generator for producing electrical power for driving the electric motor; a variable speed Z~lB~16 hydraulic motor to drive the AC generator; a hydraulic pump connected to the hydraulic motor and control means between the pump and the motor for variably controlling the flow of liquid from the pump to the motor; and means for connecting the hydraulic pump to a power take-off of an engine of an aircraft.
In another form of another embodiment of the present invention, there is provided a liquid atomizing apparatus for aerial spraying comprising: a rotatable atomizer; a variable speed AC electric motor for driving the atomizer; an AC generator for producing electric power to drive the electric motor at a speed relative to the speed of the generator; and variable speed drive means for connection between the generator and a power lS take-off of an engine of an aircraft used for aerial spraying, the drive means including means for controllably varying the speed of a motor means, the motor means varying the speed of the generator relative to the speed of the engine.
In another form of another embodiment, a liquid atomizing apparatus for aerial spraying comprises: a rotatable atomizer; a variable speed AC electric motor for driving the atomizer; an AC generator for producing electric power to drive the electric motor at a speed relative to the speed of the generator; and variable speed drive means for connection between the generator and a power take-off of an engine of an aircraft used for aerial spraying, the drive means including means for controllably varying the speed of the generator relative to the speed of the engine, the variable speed drive means including a variable speed hydraulic motor, pump means connected to the variable speed hydraulic motor, and control means positioned between the pump means and Z~ 16 -the variable speed hydraulic motor for controlling the flow of liquid from the pump means to the hydraulic motor to vary the speed thereof.
In a still further form of another embodiment, the apparatus includes means for feeding an output from the motor, indicative of the speed of the motor, to the control means.
In accordance with another embodiment, the apparatus comprises a plurality of atomizers, each driven by a variable speed synchronous AC motor, and means for connecting each AC motor to the generator.
In another embodiment, the pump means comprises a hydraulic pump, and includes: a hydraulic liquid reservoir; means connecting an outlet of the reservoir to an inlet of the hydraulic pump; a pipe connecting an outlet of the hydraulic pump to an inlet of the control means; a pipe connecting an outlet of the control means to an inlet of the hydraulic motor; and a pipe connecting an outlet of the hydraulic pump to an inlet of the reservoir.
In a still further embodiment, the apparatus includes bypass means extending between the control means and the reservoir.
In yet another embodiment, the reservoir, the hydraulic pump, the control means, the variable speed hydraulic motor and the generator are in the form of a unitary assembly.
One embodiment of the invention discloses a method of aerial spraying, comprising providing an aerial spraying aircraft with a liquid atomizing apparatus, the apparatus including a rotatable atomizer; a variable speed AC electric motor for driving the atomizer; an AC
BACRGROUND OF THE lNv~h-~ION
This invention relates to a liquid atomizing apparatus for aerial spraying, and in particular, relates to the provision of apparatus which will give a liquid or solid-in-liquid suspension spray having predetermined characteristics independent of the speed of the aircraft carrying out the spraying.
In a conventional spray system, a series of rotatable baskets are assembled on a wing of the aircraft. In this system, each basket is rotated by a propeller which is rotated by the passage of the aircraft through the air. The liquid to be sprayed is fed into the baskets. The baskets are perforated and the fluid is emitted centrifugally through the perforations. The droplet size is very dependent on the speed of rotation of the basket.
With the speed of rotation of the basket being determined by plane speed, the droplet size is determined. When the plane varies speed, for example, slowing down to turn round or in another manoeuvre, the droplet size increases. This is inefficient in that more liquid is required to cover an area with large drops rather than with small drops, since it has been determined that a range of drop sizes between 15 microns and 55 microns is most desirable for aerial spraying of coniferous tree foliage.
A further disadvantage is the drag occasioned by the propellers for the atomizing devices, increasing fuel consumption.
~k BRIEF SUM~ARY OF THE lNV~ LION
The present invention provides for the atomizers to be driven by an electric motor. DC motors have been used but require heavy current supply not readily available on many aircraft. In the present invention, the atomizers are driven by relatively high voltage AC motors, preferably synchronous motors, the power for which is supplied from an AC generator which is driven from a power take-off of an aircraft engine by a variable speed system. Preferably, the generator is lo driven by a hydraulic motor which is driven by a hydraulic pump, driven by a power take-off of an engine of the aircraft. A fluid control system is provided for controlling the speed of the hydraulic motor with the input of a frequency signal from a tachometer associated with at least one of the spraying units. This is then universally applicable to any aircraft with a power take-off attachment point.
In one broad concept, the invention provides a liquid atomizing apparatus for aerial spraying comprising a rotatable atomizer; a variable speed AC electric motor for driving the atomizer; an AC generator for producing electric power to drive the electric motor at a speed related to the speed of the generator; and variable speed drive means`for connection between the generator and a power take-off of an engine of an aircraft used for aerial spraying,-the drive means including means for controllably varying the speed of the generator relative to the speed of the engine.
In accordance with one embodiment of the present invention, there is provided a liquid atomizing apparatus which includes a variable speed hydraulic motor, pump means connected to the hydraulic motor, and E
~018~16 -control means positioned between the pump means and the hydraulic motor for controlling the flow of liquid from the pump means to the motor, and wherein there is included means for connecting the pump means to a power take-off of an engine of an aircraft used for aerial spraying.
In another embodiment, the apparatus includes means for feeding an output from the motor, indicative of the speed of the motor, to the control means.
In a still further embodiment, the apparatus comprises a plurality of atomizers, each driven by a variable speed synchronous AC motor, and means for connecting each AC motor to the generator.
In yet another embodiment of the present invention, the apparatus includes a hydraulic liquid reservoir; means connecting an outlet of the reservoir to an inlet of the pump means; a pipe connecting an outlet of the pump means to an inlet of the control means; a pipe connecting an outlet of the control means to an inlet of the hydraulic motor; and a pipe connecting an outlet of the pump means to an inlet of the reservoir.
In a still further embodiment, the apparatus includes bypass means extending between the control means and the reservoir.
In yet another embodiment, the reservoir, the pump means, the control means, the hydraulic motor and the generator are in the form of a unitary assembly.
In accordance with a particularly preferred embodiment of the present invention, a fluid atomizing apparatus for aerial spraying comprises: at least one rotatable liquid atomizer driven by a synchronous AC
electric motor; an AC generator for producing electrical power for driving the electric motor; a variable speed Z~lB~16 hydraulic motor to drive the AC generator; a hydraulic pump connected to the hydraulic motor and control means between the pump and the motor for variably controlling the flow of liquid from the pump to the motor; and means for connecting the hydraulic pump to a power take-off of an engine of an aircraft.
In another form of another embodiment of the present invention, there is provided a liquid atomizing apparatus for aerial spraying comprising: a rotatable atomizer; a variable speed AC electric motor for driving the atomizer; an AC generator for producing electric power to drive the electric motor at a speed relative to the speed of the generator; and variable speed drive means for connection between the generator and a power lS take-off of an engine of an aircraft used for aerial spraying, the drive means including means for controllably varying the speed of a motor means, the motor means varying the speed of the generator relative to the speed of the engine.
In another form of another embodiment, a liquid atomizing apparatus for aerial spraying comprises: a rotatable atomizer; a variable speed AC electric motor for driving the atomizer; an AC generator for producing electric power to drive the electric motor at a speed relative to the speed of the generator; and variable speed drive means for connection between the generator and a power take-off of an engine of an aircraft used for aerial spraying, the drive means including means for controllably varying the speed of the generator relative to the speed of the engine, the variable speed drive means including a variable speed hydraulic motor, pump means connected to the variable speed hydraulic motor, and control means positioned between the pump means and Z~ 16 -the variable speed hydraulic motor for controlling the flow of liquid from the pump means to the hydraulic motor to vary the speed thereof.
In a still further form of another embodiment, the apparatus includes means for feeding an output from the motor, indicative of the speed of the motor, to the control means.
In accordance with another embodiment, the apparatus comprises a plurality of atomizers, each driven by a variable speed synchronous AC motor, and means for connecting each AC motor to the generator.
In another embodiment, the pump means comprises a hydraulic pump, and includes: a hydraulic liquid reservoir; means connecting an outlet of the reservoir to an inlet of the hydraulic pump; a pipe connecting an outlet of the hydraulic pump to an inlet of the control means; a pipe connecting an outlet of the control means to an inlet of the hydraulic motor; and a pipe connecting an outlet of the hydraulic pump to an inlet of the reservoir.
In a still further embodiment, the apparatus includes bypass means extending between the control means and the reservoir.
In yet another embodiment, the reservoir, the hydraulic pump, the control means, the variable speed hydraulic motor and the generator are in the form of a unitary assembly.
One embodiment of the invention discloses a method of aerial spraying, comprising providing an aerial spraying aircraft with a liquid atomizing apparatus, the apparatus including a rotatable atomizer; a variable speed AC electric motor for driving the atomizer; an AC
2~ 6 -generator for producing electric power to drive the electric motor at a speed relative to the speed of the generator; and variable speed drive means for connection between the generator and a power take-off of an engine of an aircraft used for aerial spraying, the drive means including means for controllably varying the speed of a motor means, the motor means varying the speed of the generator relative to the speed of the engine, the variable speed drive means including a variable speed hydraulic motor, pump means connected to the variable speed hydraulic motor, and control means positioned between the pump means and the variable speed hydraulic motor for controlling the flow of liquid from the pump means to the hydraulic motor to vary the speed thereof, connecting the drive means to the power take-off of the aircraft engine, to actuate the pump means when the aircraft engine is operating to drive the motor means, and controlling the speed of the motor means by controlling the output of the AC generator while controlling the output of the pump means to thereby drive the rotatable liquid atomizer and to dispense atomizer spray.
In another form of the method of the above embodiment, the rotatable atomizing apparatus is driven by a variable speed synchronous AC electric motor.
A preferred embodiment of the invention discloses a method of aerial spraying comprising providing an aerial spraying aircraft with a liquid atomizing apparatus, the apparatus including a rotatable atomizer; a variable speed AC electric motor to drive the atomizer; an AC generator for producing electric power to drive the electric motor at a speed relative to the speed of the generator; and drive means for connection between - 2~18~16 the generator and a power take-off of an engine of an aircraft used for aerial spraying, the drive means including means for controlling the speed of the generator relative to the speed of the engine, connecting the drive means to the power take-off of the aircraft engine, to actuate the drive means when the aircraft engine is operating to drive the motor, and controlling the speed of the motor by controlling the output of the AC generator while controlling the output of the drive means to thereby drive the rotatable liquid atomizer and to dispense atomizer spray.
In another form of the method of the above embodiment, the rotatable atomizing apparatus is driven by a variable speed synchronous AC electric motor.
BRIEF DESCRIP~ION OF THE DRAWING
The invention will be readily understood by the following description in conjunction with the accompanying drawing, which is a diagrammatic illustration of one system, or form of apparatus.
In the drawing, an engine is indicated at 10 with a power take-off at 11. A hydraulic pump 12 is connected to the power take-off 11 by a connector 13.
Liquid, typically oil, is fed to the pump 12 from a reservoir 14, oil from the pump going via a hydraulic fluid control means or system 15 to hydraulic motor 16.
Oil returns to the reservoir 14 from the motor 16. A
bypass 17 extends between the control system 15 and the reservoir 14. The fluid control system 15 can be Z018~16 -manually controlled, auto-controlled, or both.
The hydraulic motor 16 drives an AC generator 18. A plurality of rotating screen atomizers 19 are shown attached at a wing, depicted generally at 20. Each atomizer is driven by a variable speed AC motor 21.
Liquid is fed to each atomizer through a pipe 22 and flexible tubes 23. Electrical connections 26 extend between generator 18 and motors 21. Excitation is provided at 27. Typically, the generator produces power at 208V, 400 Hz, three phase at 4000 R.P.M.
In the example illustrated, a tachometer connection 28 is provided on at least one of the motors 21, and is connected to the control system 15.
The hydraulic pump provides a controlled, variable oil flow to the hydraulic motor, to drive the generator 18 at a controlled, variable speed to produce the desired voltage and frequency for operation of the atomizers at a required speed of rotation.
The power required is easily generated, and there is reduced drag on the aircraft. It is possible to maintain a constant speed of the atomizers, and therefor the droplet size is also constant. The invention is very suitable for small fields and similar areas, where a constant aircraft speed is not readily achieved during the spray application. The invention can be applied to helicopters, where other aircraft could not be conveniently used.
The number of atomizers used can vary according to requirements. Where, for any reason, it is desired to alter the droplet size, this can very readily be provided by adjustment of the control system 15. It is not necessary to change the atomizer. The speed of the electric motors, and atomizers, is independent of the speed of the engine 10 and of the forward speed of the aircraft.
;~18~16 The hydraulic pump 12, control system 15, hydraulic motor 16 and reservoir 14 can be made into a unitary assembly for mounting on the aircraft, and conceivably, could be mounted on the engine which is driving the pump 12. Existing structures on an aircraft for holding conventional atomizer sprays can be used for mounting the electrically driven atomizers used with the present invention. The existing spray liquid containers and feed mechanism can be utilized, enabling the invention to be used on existing spraying aircraft.
It will be understood that various modifications can be made to the above-described embodiments without departing from the spirit and scope of the invention.
In another form of the method of the above embodiment, the rotatable atomizing apparatus is driven by a variable speed synchronous AC electric motor.
A preferred embodiment of the invention discloses a method of aerial spraying comprising providing an aerial spraying aircraft with a liquid atomizing apparatus, the apparatus including a rotatable atomizer; a variable speed AC electric motor to drive the atomizer; an AC generator for producing electric power to drive the electric motor at a speed relative to the speed of the generator; and drive means for connection between - 2~18~16 the generator and a power take-off of an engine of an aircraft used for aerial spraying, the drive means including means for controlling the speed of the generator relative to the speed of the engine, connecting the drive means to the power take-off of the aircraft engine, to actuate the drive means when the aircraft engine is operating to drive the motor, and controlling the speed of the motor by controlling the output of the AC generator while controlling the output of the drive means to thereby drive the rotatable liquid atomizer and to dispense atomizer spray.
In another form of the method of the above embodiment, the rotatable atomizing apparatus is driven by a variable speed synchronous AC electric motor.
BRIEF DESCRIP~ION OF THE DRAWING
The invention will be readily understood by the following description in conjunction with the accompanying drawing, which is a diagrammatic illustration of one system, or form of apparatus.
In the drawing, an engine is indicated at 10 with a power take-off at 11. A hydraulic pump 12 is connected to the power take-off 11 by a connector 13.
Liquid, typically oil, is fed to the pump 12 from a reservoir 14, oil from the pump going via a hydraulic fluid control means or system 15 to hydraulic motor 16.
Oil returns to the reservoir 14 from the motor 16. A
bypass 17 extends between the control system 15 and the reservoir 14. The fluid control system 15 can be Z018~16 -manually controlled, auto-controlled, or both.
The hydraulic motor 16 drives an AC generator 18. A plurality of rotating screen atomizers 19 are shown attached at a wing, depicted generally at 20. Each atomizer is driven by a variable speed AC motor 21.
Liquid is fed to each atomizer through a pipe 22 and flexible tubes 23. Electrical connections 26 extend between generator 18 and motors 21. Excitation is provided at 27. Typically, the generator produces power at 208V, 400 Hz, three phase at 4000 R.P.M.
In the example illustrated, a tachometer connection 28 is provided on at least one of the motors 21, and is connected to the control system 15.
The hydraulic pump provides a controlled, variable oil flow to the hydraulic motor, to drive the generator 18 at a controlled, variable speed to produce the desired voltage and frequency for operation of the atomizers at a required speed of rotation.
The power required is easily generated, and there is reduced drag on the aircraft. It is possible to maintain a constant speed of the atomizers, and therefor the droplet size is also constant. The invention is very suitable for small fields and similar areas, where a constant aircraft speed is not readily achieved during the spray application. The invention can be applied to helicopters, where other aircraft could not be conveniently used.
The number of atomizers used can vary according to requirements. Where, for any reason, it is desired to alter the droplet size, this can very readily be provided by adjustment of the control system 15. It is not necessary to change the atomizer. The speed of the electric motors, and atomizers, is independent of the speed of the engine 10 and of the forward speed of the aircraft.
;~18~16 The hydraulic pump 12, control system 15, hydraulic motor 16 and reservoir 14 can be made into a unitary assembly for mounting on the aircraft, and conceivably, could be mounted on the engine which is driving the pump 12. Existing structures on an aircraft for holding conventional atomizer sprays can be used for mounting the electrically driven atomizers used with the present invention. The existing spray liquid containers and feed mechanism can be utilized, enabling the invention to be used on existing spraying aircraft.
It will be understood that various modifications can be made to the above-described embodiments without departing from the spirit and scope of the invention.
Claims (18)
1. A liquid atomizing apparatus for aerial .
spraying comprising:
a rotatable atomizer;
a variable speed AC electric motor for driving said atomizer;
an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of an aircraft used for aerial spraying, said drive means including means for controllably varying the speed of said generator relative to the speed of said engine.
spraying comprising:
a rotatable atomizer;
a variable speed AC electric motor for driving said atomizer;
an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of an aircraft used for aerial spraying, said drive means including means for controllably varying the speed of said generator relative to the speed of said engine.
2. A liquid atomizing apparatus for aerial spraying comprising:
a rotatable atomizer;
a variable speed AC electric motor for driving said atomizer;
an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of an aircraft used for aerial spraying, said drive means including means for controllably varying the speed of said generator relative to the speed of said engine, said variable speed drive means includes a variable speed hydraulic motor, pump means connected to said variable speed hydraulic motor; and control means positioned between said pump means and said variable speed hydraulic motor for controlling the flow of liquid from the pump means to the hydraulic motor to vary the speed thereof to said power take-off on said engine.
a rotatable atomizer;
a variable speed AC electric motor for driving said atomizer;
an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of an aircraft used for aerial spraying, said drive means including means for controllably varying the speed of said generator relative to the speed of said engine, said variable speed drive means includes a variable speed hydraulic motor, pump means connected to said variable speed hydraulic motor; and control means positioned between said pump means and said variable speed hydraulic motor for controlling the flow of liquid from the pump means to the hydraulic motor to vary the speed thereof to said power take-off on said engine.
3. An apparatus as claimed in claim 2, including means for feeding an output from said electric motor, indicative of the speed of said motor, to said control means.
4. An apparatus as claimed in claim 2, comprising a plurality of atomizers, each driven by a variable speed synchronous AC motor, and means for connecting each AC motor to said generator.
5. An apparatus as claimed in claim 2, said pump means comprising a hydraulic pump, and including:
a hydraulic liquid reservoir;
means connecting an outlet of said reservoir to an inlet of said hydraulic pump;
a pipe connecting an outlet of said hydraulic pump to an inlet of said control means;
a pipe connecting an outlet of said control means to an inlet of said hydraulic motor; and a pipe connecting an outlet of said hydraulic pump to an inlet of said reservoir.
a hydraulic liquid reservoir;
means connecting an outlet of said reservoir to an inlet of said hydraulic pump;
a pipe connecting an outlet of said hydraulic pump to an inlet of said control means;
a pipe connecting an outlet of said control means to an inlet of said hydraulic motor; and a pipe connecting an outlet of said hydraulic pump to an inlet of said reservoir.
6. An apparatus as claimed in claim 5, including by-pass means extending between said control means and said reservoir.
7. An apparatus as claimed in claim 5, wherein said reservoir, said hydraulic pump, said control means, said variable speed hydraulic motor and said generator are in the form of a unitary assembly.
8. A method of aerial spraying comprising: providing an aerial spraying aircraft with a liquid atomizing apparatus, said apparatus including a rotatable atomizer; a variable speed AC electric motor for driving said atomizer; an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of an aircraft used for aerial spraying, said drive means including means for controllably varying the speed of said generator relative to the speed of said engine, connecting said drive means to said power take-off of said aircraft engine, to actuate said drive means when the aircraft engine is operating to drive said motor, and controlling the speed of said motor by controlling the output of said AC generator while controlling the output of said drive means to thereby drive said rotatable liquid atomizer and to dispense atomizer spray.
9. The method of claim 8, said rotatable atomizing apparatus being driven by a variable speed synchronous AC electric motor.
10. A liquid atomizing apparatus for aerial spraying comprising:
a rotatable atomizer;
a variable speed AC electric motor for driving said atomizer;
an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of an aircraft used for aerial spraying, said drive means including means for controllably varying the speed of a motor means, said motor means controllably varying the speed of said generator relative to the speed of said engine.
a rotatable atomizer;
a variable speed AC electric motor for driving said atomizer;
an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of an aircraft used for aerial spraying, said drive means including means for controllably varying the speed of a motor means, said motor means controllably varying the speed of said generator relative to the speed of said engine.
11. An aircraft having a liquid atomizing apparatus for aerial spraying comprising:
an aircraft;
a rotatable atomizer;
a variable speed AC electric motor for driving said atomizer;
an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of said aircraft used for aerial spraying, said drive means including means for controllably varying the speed of said generator relative to the speed of said engine, said variable speed drive means including a variable speed hydraulic motor, pump means connected to said variable speed hydraulic motor, and control means positioned between said pump means and said variable speed hydraulic motor for controlling the flow of liquid from the pump means to the hydraulic motor to vary the speed thereof.
an aircraft;
a rotatable atomizer;
a variable speed AC electric motor for driving said atomizer;
an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of said aircraft used for aerial spraying, said drive means including means for controllably varying the speed of said generator relative to the speed of said engine, said variable speed drive means including a variable speed hydraulic motor, pump means connected to said variable speed hydraulic motor, and control means positioned between said pump means and said variable speed hydraulic motor for controlling the flow of liquid from the pump means to the hydraulic motor to vary the speed thereof.
12. An apparatus as claimed in claim 11, including means for feeding an output from said variable speed AC electric motor, indicative of the speed of said variable speed AC electric motor, to said control means.
13. An apparatus as claimed in claim 11, comprising a plurality of atomizers, each driven by a variable speed synchronous AC motor, and means for connecting each AC motor to said generator.
14. An apparatus as claimed in claim 11, said pump means comprising a hydraulic pump and including:
15 a hydraulic liquid reservoir;
means connecting an outlet of said reservoir to an inlet of said hydraulic pump;
a pipe connecting an outlet of said hydraulic pump to an inlet of said control means;
a pipe connecting an outlet of said control means to an inlet of said hydraulic motor; and a pipe connecting an outlet of said hydraulic pump to an inlet of said reservoir.
15. An apparatus as claimed in claim 14, including bypass means extending between said control means and said reservoir.
means connecting an outlet of said reservoir to an inlet of said hydraulic pump;
a pipe connecting an outlet of said hydraulic pump to an inlet of said control means;
a pipe connecting an outlet of said control means to an inlet of said hydraulic motor; and a pipe connecting an outlet of said hydraulic pump to an inlet of said reservoir.
15. An apparatus as claimed in claim 14, including bypass means extending between said control means and said reservoir.
16. An apparatus as claimed in claim 14, wherein said reservoir, said hydraulic pump, said control means, said variable speed hydraulic motor and said generator are in the form of a unitary assembly.
17. A method of aerial spraying comprising: providing an aerial spraying aircraft with a liquid atomizing apparatus, said apparatus including a rotatable atomizer; a variable speed AC electric motor for driving said atomizer; an AC generator for producing electric power to drive said electric motor at a speed relative to the speed of said generator; and variable speed drive means for connection between said generator and a power take-off of an engine of an aircraft used for aerial spraying, said drive means including means for controllably varying the speed of a motor means, said motor means controllably varying the speed of said generator relative to the speed of said engine, said variable speed drive means including a variable speed hydraulic motor, pump means connected to said variable speed hydraulic motor, and control means positioned between said pump means and said variable speed hydraulic motor for controlling the flow of liquid from the pump means to the hydraulic motor to vary the speed thereof, connecting said drive means to said power take-off of said aircraft engine, to actuate said pump means when the aircraft engine is operating to drive said motor means, and controlling the speed of said motor means by controlling the output of said AC generator while controlling the output of said pump means to thereby drive said rotatable liquid atomizer and to dispense atomizer spray.
18. The method of claim 17, said rotatable atomizing apparatus being driven by a variable speed synchronous AC
electric motor.
electric motor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/306,425 US4948050A (en) | 1989-02-06 | 1989-02-06 | Liquid atomizing apparatus for aerial spraying |
| CA002018216A CA2018216C (en) | 1989-02-06 | 1990-06-04 | Liquid atomizing apparatus for aerial spraying |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/306,425 US4948050A (en) | 1989-02-06 | 1989-02-06 | Liquid atomizing apparatus for aerial spraying |
| CA002018216A CA2018216C (en) | 1989-02-06 | 1990-06-04 | Liquid atomizing apparatus for aerial spraying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2018216A1 CA2018216A1 (en) | 1991-12-04 |
| CA2018216C true CA2018216C (en) | 1994-11-22 |
Family
ID=25674155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002018216A Expired - Fee Related CA2018216C (en) | 1989-02-06 | 1990-06-04 | Liquid atomizing apparatus for aerial spraying |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4948050A (en) |
| CA (1) | CA2018216C (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4228093A (en) * | 1992-05-04 | 1993-11-29 | David L. Berliner | Process for absorbing ultraviolet radiation using dispersed melanin |
| US7427156B2 (en) * | 2004-12-20 | 2008-09-23 | Odyne Corporation | Thermally managed battery enclosure for electric and hybrid electric vehicles |
| CA2531295C (en) * | 2004-12-22 | 2013-10-22 | Odyne Corporation | Battery management and equalization system for batteries using power line carrier communications |
| US7830117B2 (en) | 2005-01-10 | 2010-11-09 | Odyne Systems, Llc | Vehicle charging, monitoring and control systems for electric and hybrid electric vehicles |
| US20120207620A1 (en) | 2007-07-12 | 2012-08-16 | Odyne Systems, LLC. | Hybrid vehicle drive system and method and idle reduction system and method |
| US9878616B2 (en) | 2007-07-12 | 2018-01-30 | Power Technology Holdings Llc | Hybrid vehicle drive system and method using split shaft power take off |
| US9061680B2 (en) | 2007-07-12 | 2015-06-23 | Odyne Systems, Llc | Hybrid vehicle drive system and method for fuel reduction during idle |
| US8408341B2 (en) * | 2007-07-12 | 2013-04-02 | Odyne Systems, Llc | Hybrid vehicle drive system and method and idle reduction system and method |
| US8818588B2 (en) * | 2007-07-12 | 2014-08-26 | Odyne Systems, Llc | Parallel hybrid drive system utilizing power take off connection as transfer for a secondary energy source |
| US8978798B2 (en) | 2007-10-12 | 2015-03-17 | Odyne Systems, Llc | Hybrid vehicle drive system and method and idle reduction system and method |
| US8839876B2 (en) * | 2010-07-13 | 2014-09-23 | Rom Acquisition Corporation | Hydraulic system and method for delivering electricity, water, air, and foam in a firefighting apparatus |
| EP2785570B1 (en) | 2011-12-02 | 2022-09-14 | Power Technology Holdings, LLC | System for and method of fuel optimization in a hybrid vehicle |
| US11225240B2 (en) | 2011-12-02 | 2022-01-18 | Power Technology Holdings, Llc | Hybrid vehicle drive system and method for fuel reduction during idle |
| US9227726B2 (en) * | 2012-11-29 | 2016-01-05 | The Boeing Company | Aircraft bird strike prevention |
| EP3071438A4 (en) | 2013-11-18 | 2017-08-02 | Power Technology Holdings LLC | Hybrid vehicle drive system and method using split shaft power take off |
| US9185856B1 (en) * | 2014-06-28 | 2015-11-17 | Frank August Barcatta | Liquid flow rate modulator |
| AU2016349902B2 (en) | 2015-11-02 | 2019-11-07 | AeroVironment, lnc. | Disbursement system for an unmanned aerial vehicle |
| US10076763B2 (en) * | 2016-11-11 | 2018-09-18 | Dawei Dong | Propeller lift suspension boom truss spray combination module system |
| CN112610569B (en) * | 2020-12-07 | 2023-09-05 | 北京天玛智控科技股份有限公司 | power supply system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2528986A (en) * | 1945-05-24 | 1950-11-07 | Lytle S Adams | Aerial seed distributor |
| US2721102A (en) * | 1953-06-25 | 1955-10-18 | James M Nissen | Agricultural sprayer |
| US3429510A (en) * | 1966-06-24 | 1969-02-25 | Henry Bernard Taylor | Agriculture spray unit |
| US3452931A (en) * | 1968-04-15 | 1969-07-01 | Buffalo Turbine Agri Equip Co | Agricultural sprayer |
| US3869655A (en) * | 1972-09-27 | 1975-03-04 | Koehring Co | Motor controlled material spreading vehicles |
| US3968933A (en) * | 1973-12-07 | 1976-07-13 | Amchem Products, Inc. | Apparatus for hydraulic planting |
-
1989
- 1989-02-06 US US07/306,425 patent/US4948050A/en not_active Expired - Fee Related
-
1990
- 1990-06-04 CA CA002018216A patent/CA2018216C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2018216A1 (en) | 1991-12-04 |
| US4948050A (en) | 1990-08-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed | ||
| MKLA | Lapsed |
Effective date: 20070604 |