CN114427599B - Electrohydraulic control system of main reducer of rotary wing aircraft - Google Patents
Electrohydraulic control system of main reducer of rotary wing aircraft Download PDFInfo
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- CN114427599B CN114427599B CN202210102863.4A CN202210102863A CN114427599B CN 114427599 B CN114427599 B CN 114427599B CN 202210102863 A CN202210102863 A CN 202210102863A CN 114427599 B CN114427599 B CN 114427599B
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- clutch
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 43
- 238000005461 lubrication Methods 0.000 claims abstract description 118
- 230000001050 lubricating effect Effects 0.000 claims abstract description 49
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 250
- 239000010687 lubricating oil Substances 0.000 claims description 24
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
- F16H57/0404—Lubricant filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0436—Pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0441—Arrangements of pumps
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention provides an electrohydraulic control system of a main speed reducer of a rotary wing aircraft, which comprises a lubrication unit for lubricating at least shaft teeth and a clutch in the main speed reducer, and an execution unit for driving the clutch to act; the lubrication unit comprises a lubrication pump with an inlet connected with the oil pan, a lubrication oil way connected with an outlet of the lubrication pump, a shaft tooth lubrication branch connected with a shaft tooth lubrication oil injection pipe in parallel on the lubrication oil way, and a clutch lubrication branch connected with the clutch; the execution unit comprises an execution pump with an inlet connected with the oil pan and an execution oil way connected with an outlet of the execution pump. The electro-hydraulic control system can realize the control of the clutch while cooling and lubricating the main speed reducer, and can adjust the gear of the main speed reducer.
Description
Technical Field
The invention relates to an electrohydraulic control system, in particular to an electrohydraulic control system of a main speed reducer of a rotorcraft.
Background
Rotorcraft include both helicopters and autogyros. The speed reducer is an indispensable component on the rotorcraft, and has a power input end connected with the engine transmission and a power output end connected with the rotor and tail rotor accessory transmission shafts, and is one of main transmission components on the helicopter and is the most complex, largest and important component in the transmission device.
The electrohydraulic control system is a control method which can receive analog or digital signals in hydraulic transmission and control the output flow or pressure edge in proportion, has the advantages of convenient operation, high degree of automation, stable operation and the like, and is widely applied to various speed reducers for lubrication and cooling and control systems for realizing gear change.
The function of the electrohydraulic control system of the main speed reducer of the existing rotary wing aircraft is mainly lubrication and cooling, and the electrohydraulic control system does not have the capability of controlling a clutch, so that the gear control of the speed reducer cannot be realized. In addition, the electro-hydraulic control system of the existing rotor aviation speed reducer mainly uses a mechanical pump for independent oil supply, and the mechanical oil pump has large discharge capacity and continuously runs, so that the torque loss of the speed reducer can be caused, and the working efficiency of the speed reducer is reduced.
In addition, the multistage redundancy of the electrohydraulic control system of the main speed reducer of the existing rotorcraft is achieved by using a plurality of mechanical pumps, and the weight of the transmission system is increased while the transmission system is more complicated.
Disclosure of Invention
In view of the above, the present invention aims to provide an electrohydraulic control system of a main speed reducer of a rotary wing aviation, so as to realize cooling and lubrication of the main speed reducer and control of a clutch.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
an electrohydraulic control system of a main reducer of a rotorcraft, comprising a lubrication unit for lubricating at least the shaft teeth and the clutch in the main reducer, and an execution unit for actuating at least the clutch;
the lubricating unit comprises a lubricating pump with an inlet connected with the oil pan, a lubricating oil way connected with an outlet of the lubricating pump, a shaft tooth lubricating branch connected with a shaft tooth lubricating oil injection pipe in parallel on the lubricating oil way, and a clutch lubricating branch connected with a clutch, wherein a proportional pressure electromagnetic valve is arranged on the lubricating oil way between the shaft tooth lubricating branch and the clutch lubricating branch;
the execution unit comprises an execution pump with an inlet connected with the oil pan and an execution oil way connected with an outlet of the execution pump, and the execution oil way is connected with the clutch.
Further, the inlet of the lubricating pump and/or the executing pump is connected with the oil pan through a suction filter, and a metal debris detector is arranged in the suction filter.
Furthermore, a lubricating pump pressure limiting valve is connected in parallel on the lubricating oil path, and/or a throttle is connected in parallel on the execution oil path, and outlets of the lubricating pump pressure limiting valve and the throttle are connected with the oil pan.
Further, the lubricating oil path is provided with an oil cooler and a filter press which are sequentially arranged.
Furthermore, two ends of the oil cooler are connected with bypass oil paths in parallel, and bypass electromagnetic valves are arranged on the bypass oil paths.
Further, a lubrication pressure sensor is arranged on the clutch lubrication branch, a switching electromagnetic valve positioned at the upstream of the oil cooler is arranged on the lubrication branch, and a first redundant oil way is connected to the switching electromagnetic valve;
the first redundant oil way is connected in parallel to the lubricating oil way between the shaft tooth lubricating branch and the clutch lubricating branch, and the switch solenoid valve acts to switch the lubricating pump to be communicated with the first redundant oil way.
Further, the lubrication circuit is provided with a first one-way valve arranged adjacent to the pressure filter, and the first one-way valve is positioned downstream of the pressure filter.
Further, the electrohydraulic control system further comprises a redundant pump with an inlet connected with the oil pan, an outlet of the redundant pump is connected with a second redundant oil way, the second redundant oil way is connected in parallel with the lubricating oil way between the shaft tooth lubricating branch and the clutch lubricating branch, and a second one-way valve is arranged on the second redundant oil way.
Further, an execution pressure sensor is arranged on the execution oil way, a third redundant oil way is connected in parallel with the outlet of the redundant pump, and the third redundant oil way is connected in parallel with the execution oil way; the third redundant oil way is provided with a third one-way valve, and the execution oil way is provided with a fourth one-way valve positioned at the upstream of the parallel connection point of the third redundant oil way.
Further, the lubrication pump adopts a mechanical pump, the execution pump and the redundant pump adopt electronic pumps, and the redundant pump adopts a two-stage electronic pump.
Compared with the prior art, the invention has the following advantages:
according to the electrohydraulic control system of the main speed reducer of the rotor aircraft, through the lubricating unit for lubricating the shaft teeth and the clutch in the main speed reducer, the shaft teeth and the clutch in the main speed reducer can be cooled and lubricated, and the actuating unit for actuating the clutch can be arranged for actuating the clutch, so that the gear of the main speed reducer can be regulated, and the practicability of the electrohydraulic control system can be improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic illustration of an electro-hydraulic control system for a rotary wing air speed reducer in accordance with an embodiment of the present invention;
fig. 2 is a schematic diagram of an oil flow direction of an electrohydraulic control system of a rotor aviation speed reducer, according to an embodiment of the present invention, when the main speed reducer is lubricated through a lubrication oil path;
FIG. 3 is a schematic diagram illustrating an oil flow direction of an electro-hydraulic control system of a rotary wing aero-speed reducer according to an embodiment of the present invention when lubricating the main speed reducer through a first redundant oil path;
fig. 4 is a schematic diagram of an oil flow direction of an electrohydraulic control system of a rotor aviation speed reducer according to an embodiment of the present invention when lubricating a main speed reducer through a second redundant oil path;
FIG. 5 is a schematic diagram of the flow of oil through an actuation circuit of an electro-hydraulic control system of a rotorcraft retarder according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an oil flow direction of an electrohydraulic control system of a rotor aviation speed reducer according to an embodiment of the present invention when a clutch is controlled through a third redundant oil path.
Reference numerals illustrate:
1. a lubrication pump; 2. a lubrication oil path; 201. a shaft tooth lubrication branch; 202. a clutch lubrication branch; 3. an oil pan; 4. the shaft teeth lubricate the oil injection pipe; 5. the clutch lubricates the oil injection pipe;
6. a proportional pressure solenoid valve; 7. executing a pump; 8. executing an oil path; 9. a clutch; 10. a suction filter; 11. a lubrication pump pressure limiting valve; 12. a throttle; 13. an oil cooler; 14. a press filter;
15. a bypass oil path; 16. a bypass solenoid valve; 17. a lubrication pressure sensor; 18. switching on and off the electromagnetic valve; 19. a first redundant oil path; 20. a first one-way valve; 21. a second one-way valve;
22. a third one-way valve; 23. a fourth one-way valve; 24. a redundant pump; 25. a second redundant oil path; 26. an oil filter; 27. executing a pressure sensor; 28. a third redundant oil path; 29. an oil level window; 30. a temperature sensor.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in combination with specific cases.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The invention relates to an electrohydraulic control system for a main gearbox of a rotorcraft, comprising a lubrication unit for lubricating at least the shaft teeth in the main gearbox and the clutch 9, and an execution unit for actuating the clutch 9.
The lubrication unit comprises a lubrication pump 1 with an inlet connected with an oil pan 3, a lubrication oil path 2 connected with an outlet of the lubrication pump 1, a shaft tooth lubrication branch 201 connected with a shaft tooth lubrication oil injection pipe 4 in parallel on the lubrication oil path 2, and a clutch lubrication branch 202 connected with a clutch 9, wherein a proportional pressure electromagnetic valve 6 is arranged on the lubrication oil path 2 between the shaft tooth lubrication branch 201 and the clutch lubrication branch 202. The execution unit comprises an execution pump 7 with an inlet connected with the oil pan 3 and an execution oil circuit 8 connected with an outlet of the execution pump 7, wherein the execution oil circuit 8 is connected with a clutch 9.
Based on the above description, it should be noted that, the lubrication unit in the electro-hydraulic control system of this embodiment can lubricate the shaft, the gear and the clutch 9 in the main reducer, and also lubricate other elements that need to be lubricated in the main reducer, such as a bearing, and only needs to be provided with a corresponding lubrication branch on the lubrication oil path 2 and a lubrication oil injection pipe for lubrication at the elements such as the bearing.
Of course, in addition to the lubrication function, the lubrication unit in the present embodiment can cool the shaft, gears, clutch 9, and other elements in the final drive. In addition, in this embodiment, the execution unit may not only drive the clutch 9 to act, but also control other elements to act, and only needs to provide an additional execution oil path 8 between the outlet of the execution pump 7 and the element to be acted.
The proportional pressure electromagnetic valve 6 arranged on the lubricating oil path 2 between the shaft tooth lubricating branch 201 and the clutch lubricating branch 202 can regulate the oil flow of the shaft tooth lubricating branch 201 and the clutch lubricating branch 202, and control the distribution of the oil flow on the shaft tooth lubricating branch 201 and the clutch lubricating branch 202. As shown in fig. 1, the proportional pressure solenoid valve 6 in the present embodiment is a two-position two-way proportional pressure solenoid valve 6 having two operating positions for connecting and disconnecting the clutch lubrication branch 202. Of course, other types of proportional pressure solenoid valves 6 may be used if desired.
In the present embodiment, the inlets of the lubrication pump 1 and the execution pump 7 are connected to the oil pan 3 through the suction filter 10, and a metal chip detector is provided in the suction filter 10. The fine filter is arranged to filter oil in the gearbox, so that the cleanliness of the oil in the oil way is improved. In addition, the metal debris detector of the present embodiment can be implemented using metal debris detection components commonly used in existing engine or transmission lubrication systems
The lubrication oil way 2 is connected with a lubrication pump pressure limiting valve 11 in parallel, the execution oil way 8 is connected with a restrictor 12 in parallel, and outlets of the lubrication pump pressure limiting valve 11 and the restrictor 12 are connected with the oil pan 3. As shown in fig. 1, the pressure limiting valve 11 of the lubricating pump is arranged near the outlet of the lubricating pump 1, and by arranging the pressure limiting valve 11 of the lubricating pump on the lubricating oil path 2, the pressure of the oil outlet of the lubricating pump 1 can be limited, when the oil pressure in the lubricating oil path 2 at the outlet of the lubricating pump 1 is too high, part of the oil in the lubricating oil path 2 can flow back into the oil pan 3 through the pressure limiting valve 11 of the lubricating pump, so that the pressure in the lubricating oil path 2 is reduced, and the reliability of the lubricating unit during operation is improved.
In addition, through parallelly connected with the restrictor 12 on carrying out the oil circuit 8, then can adjust the pressure of carrying out the interior fluid of oil circuit 8, when carrying out the interior fluid pressure of oil circuit 8 too high, the partial fluid in carrying out the oil circuit 8 then can flow back to in the oil pan 3 through the restrictor 12, and then reduce the pressure of the interior fluid of carrying out the oil circuit 8, be favorable to promoting the reliability of execution unit work. It should be noted that, the pressure limiting valve 11 of the lubrication pump in this embodiment may be a check valve commonly used in the existing hydraulic system, and the throttle 12 in this embodiment may be a throttle valve commonly used in the prior art.
As shown in fig. 1, an oil cooler 13 and a filter press 14 are provided in this order in the lubrication oil passage 2. The oil in the lubrication oil passage 2 can be cooled by providing the oil cooler 13 so that the oil is maintained at a proper operating temperature. The filter press 14 is arranged to finely filter the oil in the lubricating oil path 2, so that the cleanliness of the oil in the lubricating oil path 2 is further improved. Preferably, in this embodiment, the oil cooler 13 is an air-cooled oil cooler 13, and in addition, the oil cooler 13 in this embodiment is a water-cooled oil cooler 13.
Further, bypass oil passages 15 are connected in parallel to both ends of the oil cooler 13, and bypass solenoid valves 16 are provided in the bypass oil passages 15. Part of the oil in the lubricating oil way 2 is converged with the oil cooled by the oil cooler 13 after passing through the bypass oil way 15, and the bypass oil way 15 are provided with the bypass electromagnetic valve 16, so that the on-off of the bypass oil way 15 can be controlled, the oil flow entering the oil cooler 13 can be controlled conveniently, the oil cooler 13 is assisted to work, and the oil in the lubricating oil way 2 is at a proper working temperature. In addition, the bypass solenoid valve 16 in this embodiment may be a two-position two-way solenoid valve having two operating positions for connecting and disconnecting the bypass oil passage 15.
As also shown in fig. 1, a lubrication pressure sensor 17 is provided on the clutch lubrication branch 202, and an on-off solenoid valve 18 located upstream of the oil cooler 13 is provided on the lubrication oil passage 2, and a first redundant oil passage 19 is connected to the on-off solenoid valve 18. The first redundant oil passage 19 is connected in parallel to the lubrication oil passage 2 between the tooth lubrication branch 201 and the clutch lubrication branch 202, and the switching solenoid valve 18 operates to switch the lubrication pump 1 to communicate with the first redundant oil passage 19.
The pressure of the oil in the lubricating oil way 2 can be monitored in real time through the lubricating pressure sensor 17, so that whether the working of the electrohydraulic control system is abnormal or not can be judged. When the lubrication pressure sensor 17 alarms, the operating position of the switching solenoid valve 18 can be switched under the control of the external control unit, so that the lubrication pump 1 is switched to communicate with the first redundant oil passage 19. As shown in fig. 1, the switching solenoid valve 18 in the present embodiment is a two-position three-way switching solenoid valve 18, which has a first operating position for communicating the outlet of the lubrication pump 1 with the oil cooler 13, and a second operating position for communicating the outlet of the lubrication pump 1 with the first redundant oil passage 19.
In the present embodiment, a first check valve 20 is provided on the lubrication oil passage 2, which is disposed adjacent to the pressure filter 14, and the first check valve 20 is located downstream of the pressure filter 14. By providing the first check valve 20, the working efficiency of the electro-hydraulic control system is prevented from being affected by the backflow of oil in the process of supplying oil to the tooth lubrication branch 201 through the first redundant oil passage 19 and a second redundant oil passage 25 described below. When the first redundant oil passage 19 is switched to lubricate the shaft teeth and the clutch 9, or the second redundant oil passage 25 described below is used to lubricate the clutch 9 and the shaft teeth, the oil in the shaft teeth lubrication branch 201 and the clutch lubrication branch 202 can be prevented from flowing into the lubrication oil passage 2, which affects the cooling effect of the clutch 9 and the shaft teeth.
The electrohydraulic control system further comprises a redundant pump 24 with an inlet connected with the oil pan 3, an outlet of the redundant pump 24 is connected with a second redundant oil way 25, the second redundant oil way 25 is connected in parallel with the lubricating oil way 2 between the shaft tooth lubricating branch 201 and the clutch lubricating branch 202, and a second one-way valve 21 is arranged on the second redundant oil way 25. By the arrangement of the second check valve 21, oil flowing through the clutch lubrication branch 202 and the first redundant oil passage 19 can be prevented from flowing back into the oil pan 3 through the second redundant oil passage 25, and the working efficiency of the electro-hydraulic control system can be reduced.
Through being provided with second redundant oil circuit 25, then report to the police when lubricated pressure sensor 17, and when first redundant oil circuit 19 can not use, then can start redundant pump 24, the import of redundant pump 24 is through oil filter 26 and the intercommunication in the oil pan 3, carries fluid to axle tooth lubrication branch road 201 and clutch lubrication branch road 202 through second redundant oil circuit 25 to realize lubrication and cooling to axle tooth and clutch 9.
The execution oil path 8 is provided with an execution pressure sensor 27, the outlet of the redundant pump 24 is connected in parallel with a third redundant oil path 28, and the third redundant oil path 28 is connected in parallel with the execution oil path 8. The third redundant oil passage 28 is provided with a third check valve 22, and the execution oil passage 8 is provided with a fourth check valve 23 positioned upstream of the parallel connection point of the third redundant oil passage 28.
The executing pressure sensor 27 can monitor the oil pressure in the executing oil path 8 in real time, and judge whether the operation of the electrohydraulic control system is abnormal, when the executing pressure sensor 27 alarms, the executing pump 7 stops working under the control of the external control unit, the redundant pump 24 starts working, and the oil is conveyed into the third redundant oil path 28 to control the action of the clutch 9.
The third check valve 22 is provided to prevent the oil from flowing back through the execution oil passage 8 during the oil supply to the clutch 9 through the third redundant oil passage 28, thereby affecting the operation of the clutch 9 and the operation efficiency of the electro-hydraulic control system. The fourth check valve 23 prevents the oil from flowing back through the third redundant oil passage 28 during the process of supplying oil to the clutch 9 through the execution oil passage 8, thereby affecting the operation of the clutch 9 and the operation efficiency of the electro-hydraulic control system.
Further, the lubrication pump 1 in the present embodiment employs a mechanical pump, the execution pump 7 and the redundant pump 24 employ electronic pumps, and the redundant pump 24 employs a two-stage electronic pump. For example, the lubrication pump 1 may be an external gear pump, and the actuator pump 7 may be a rotor pump. Through the oil supply mode that adopts mechanical pump and electronic pump cooperation work, can effectively reduce the complexity and the moment of torsion loss of main reducer to promote main reducer's work efficiency. In addition, the two-stage electronic pump in the embodiment is an electronic pump formed by two-stage pump bodies together, and can provide larger flow and pressure.
As shown in fig. 1, an oil level window 29 is further provided in the present embodiment, and the oil level window 29 is provided on an oil monitoring line extending from the bottom of the oil pan 3, so that the oil level in the oil pan 3 can be observed through the oil level window 29, so that the oil in the oil pan 3 can be replenished in time. In the present embodiment, a temperature sensor 30 is provided, and the sensing end of the temperature sensor 30 is in contact with the liquid in the oil pan 3 to measure the temperature of the oil in the oil pan 3.
When the lubrication unit of the electro-hydraulic control system works, as shown in fig. 2, oil in the oil pan 3 is filtered by the suction filter 10 and then pumped into the lubrication oil path 2 by the lubrication pump 1, at this time, the switching electromagnetic valve 18 is in the first working position, and the oil in the lubrication oil path 2 is conveyed into the oil cooler 13 after passing through the switching electromagnetic valve 18.
The oil cooled by the oil cooler 13 is finely filtered by the filter press 14 and enters the shaft tooth lubrication branch 201 and the clutch lubrication branch 202 after passing through the first one-way valve 20, the oil in the shaft tooth lubrication branch 201 is sprayed out by the shaft tooth lubrication oil spray pipe 4 to lubricate and cool the shaft tooth in the main speed reducer, and the oil in the clutch lubrication branch 202 lubricates and cools the clutch 9 by the clutch lubrication oil spray pipe 5 positioned at the position of the clutch 9.
When the lubrication pressure sensor 17 alarms due to the failure of an element in the lubrication unit, the on-off solenoid valve 18 can be switched to the second working position under the control of the external control unit, so that the lubrication pump 1 is switched to be communicated with the first redundant oil passage 19.
The oil pumped by the lubrication pump 1 can enter the first redundant oil path 19 through the switching electromagnetic valve 18, as shown in fig. 3, one part of the oil entering the first redundant oil path 19 is sprayed out through the clutch lubrication branch 202 and the oil injection pipe of the clutch 9 to lubricate the clutch 9, and the other part of the oil enters the shaft tooth lubrication branch 201 through the proportional pressure electromagnetic valve 6 and is sprayed out through the shaft tooth lubrication oil injection pipe 4 to lubricate components such as a shaft, a gear and a bearing in the main speed reducer.
If the lubrication pressure sensor 17 is alerted and the lubrication of the shaft teeth of the final drive and the clutch 9 is not possible through the first redundant oil passage 19, the lubrication of the shaft, the gear, the clutch 9, and other elements in the final drive can be performed through the second redundant oil passage 25.
At this time, as shown in fig. 4, the lubrication pump 1 stops working, and the oil is delivered into the second redundant oil path 25 by the redundant pump 24, part of the oil in the second redundant oil path 25 passes through the clutch lubrication branch 202 and is sprayed out from the oil spray pipe of the clutch 9 to lubricate the clutch 9, and the rest of the oil in the second redundant oil path 25 passes through the proportional pressure solenoid valve 6 and then passes through the shaft tooth lubrication branch 201 and is sprayed out from the shaft tooth lubrication oil spray pipe 4 to lubricate the shaft, gears and the like in the main reducer.
When the execution unit of the electro-hydraulic control system works, as shown in fig. 5, oil in the oil pan 3 is filtered by the suction filter 10 and then pumped into the execution oil path 8 by the execution pump 7, and the oil in the execution oil path 8 enters the clutch 9 through the fourth one-way valve 23 to control the action of the clutch 9.
When the pressure sensor 27 is used for alarming, oil can be supplied to the clutch 9 through the third redundant oil passage 28, and as shown in fig. 6, the operation of the pump 7 is stopped at this time, the oil in the oil pan 3 is pumped into the third redundant oil passage 28 through the redundant pump 24, and the oil in the third redundant oil passage 28 passes through the third check valve 22 and then the clutch 9 is operated to control the operation of the clutch 9.
In the case of lubrication of the final drive via the second redundant oil line, the oil level in the oil sump is generally low, so that for the shift control of the clutch, the clutch is also controlled via the third redundant oil line, i.e. at this point in time, the redundant pump 24 simultaneously supplies oil to the gear oil injection line 4, the clutch oil injection line 5 and the shift control line of the clutch, in order to ensure proper operation of the electrohydraulic control system.
In addition, the oil in this embodiment may be lubricating oil commonly used in the prior art. The external control unit in this embodiment may be a TCU automatic control unit, that is, an automatic gearbox control unit, which is commonly used in the prior art.
The electrohydraulic control system of the main speed reducer of the rotary wing aircraft of the embodiment can cool and lubricate the shaft teeth and the clutch 9 in the main speed reducer by being provided with a lubrication unit for lubricating the shaft teeth and the clutch 9 in the main speed reducer. In addition, by providing the execution unit for actuating the clutch 9, the adjustment of the gear of the final drive can be realized by actuating the clutch 9, so that the practicability of the system can be improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. An electrohydraulic control system of a main reducer of a rotorcraft, characterized in that:
comprises a lubrication unit for lubricating at least the shaft teeth in the main reducer and the clutch (9), and an execution unit for driving the clutch (9) to act;
the lubrication unit comprises a lubrication pump (1) with an inlet connected with an oil pan (3), a lubrication oil path (2) connected with an outlet of the lubrication pump (1), a shaft tooth lubrication branch (201) connected with a shaft tooth lubrication oil injection pipe (4) in parallel connection with the lubrication oil path (2), and a clutch lubrication branch (202) connected with a clutch (9), wherein a proportional pressure electromagnetic valve (6) is arranged on the lubrication oil path (2) between the shaft tooth lubrication branch (201) and the clutch lubrication branch (202);
the execution unit comprises an execution pump (7) with an inlet connected with the oil pan (3) and an execution oil circuit (8) connected with an outlet of the execution pump (7), and the execution oil circuit (8) is connected with the clutch (9);
an oil cooler (13) and a filter press (14) which are sequentially arranged are arranged on the lubricating oil path (2);
a lubrication pressure sensor (17) is arranged on the clutch lubrication branch (202), a switching electromagnetic valve (18) positioned at the upstream of the oil cooler (13) is arranged on the lubrication oil path (2), and a first redundant oil path (19) is connected to the switching electromagnetic valve (18);
the first redundant oil circuit (19) is connected in parallel to the lubricating oil circuit (2) between the shaft tooth lubricating branch circuit (201) and the clutch lubricating branch circuit (202), and the switching electromagnetic valve (18) acts, so that the lubricating pump (1) can be switched to be communicated with the first redundant oil circuit (19).
2. The rotorcraft final drive electro-hydraulic control system of claim 1, wherein:
the inlet of the lubricating pump (1) and/or the executing pump (7) is connected with the oil pan (3) through a suction filter (10), and a metal debris detector is arranged in the suction filter (10).
3. The rotorcraft final drive electro-hydraulic control system of claim 1, wherein:
and the lubricating oil way (2) is connected with a lubricating pump pressure limiting valve (11) in parallel, and/or the executing oil way (8) is connected with a restrictor (12) in parallel, and outlets of the lubricating pump pressure limiting valve (11) and the restrictor (12) are connected with the oil pan (3).
4. The rotorcraft final drive electro-hydraulic control system of claim 1, wherein:
the two ends of the oil cooler (13) are connected with a bypass oil way (15) in parallel, and a bypass electromagnetic valve (16) is arranged on the bypass oil way (15).
5. The rotorcraft final drive electro-hydraulic control system of claim 1, wherein:
the lubrication oil path (2) is provided with a first one-way valve (20) arranged adjacent to the pressure filter (14), and the first one-way valve (20) is positioned at the downstream of the pressure filter (14).
6. The rotorcraft final drive electro-hydraulic control system of claim 1, wherein:
the electrohydraulic control system further comprises a redundant pump (24) with an inlet connected with the oil pan (3), an outlet of the redundant pump (24) is connected with a second redundant oil circuit (25), the second redundant oil circuit (25) is connected in parallel with the lubricating oil circuit (2) between the shaft tooth lubricating branch (201) and the clutch lubricating branch (202), and a second one-way valve (21) is arranged on the second redundant oil circuit (25).
7. The electro-hydraulic control system of a rotary-wing aircraft final drive of claim 6, wherein:
an execution pressure sensor (27) is arranged on the execution oil circuit (8), a third redundant oil circuit (28) is connected in parallel with the outlet of the redundant pump (24), and the third redundant oil circuit (28) is connected in parallel with the execution oil circuit (8);
the third redundant oil way (28) is provided with a third one-way valve (22), and the execution oil way (8) is provided with a fourth one-way valve (23) positioned at the upstream of the parallel connection point of the third redundant oil way (28).
8. The electro-hydraulic control system of a rotary-wing aircraft final drive of claim 7, wherein:
the lubrication pump (1) adopts a mechanical pump, the execution pump (7) and the redundant pump (24) adopt electronic pumps, and the redundant pump (24) adopts a two-stage electronic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210102863.4A CN114427599B (en) | 2022-01-27 | 2022-01-27 | Electrohydraulic control system of main reducer of rotary wing aircraft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210102863.4A CN114427599B (en) | 2022-01-27 | 2022-01-27 | Electrohydraulic control system of main reducer of rotary wing aircraft |
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| CN114427599B true CN114427599B (en) | 2024-02-06 |
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| WO2021244479A1 (en) * | 2020-06-02 | 2021-12-09 | 广州汽车集团股份有限公司 | Vehicle hydraulic control system and method |
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| CN108006209A (en) * | 2017-03-29 | 2018-05-08 | 长城汽车股份有限公司 | Double clutch automatic speed changing case cooling and lubricating hydraulic control system and vehicle |
| CN109958763A (en) * | 2017-12-26 | 2019-07-02 | 长城汽车股份有限公司 | A kind of hydraulic control system and speed changer, vehicle of double-clutch automatic gearbox |
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| EP3627004A1 (en) * | 2018-09-21 | 2020-03-25 | FTE automotive GmbH | Hydraulic device for transmission lubrication and clutch cooling for a motor vehicle |
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| CN114427599A (en) | 2022-05-03 |
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