CN114427599A - Electro-hydraulic control system of main speed reducer of rotor aircraft - Google Patents
Electro-hydraulic control system of main speed reducer of rotor aircraft Download PDFInfo
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- CN114427599A CN114427599A CN202210102863.4A CN202210102863A CN114427599A CN 114427599 A CN114427599 A CN 114427599A CN 202210102863 A CN202210102863 A CN 202210102863A CN 114427599 A CN114427599 A CN 114427599A
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 39
- 239000003921 oil Substances 0.000 claims abstract description 234
- 230000001050 lubricating effect Effects 0.000 claims abstract description 95
- 239000010687 lubricating oil Substances 0.000 claims abstract description 45
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 238000005461 lubrication Methods 0.000 claims description 46
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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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
- F16H57/0441—Arrangements of pumps
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention provides an electro-hydraulic control system of a main speed reducer of a rotary-wing aircraft, which comprises a lubricating unit and an execution unit, wherein the lubricating unit is used for lubricating at least shaft teeth and a clutch in the main speed reducer; the lubricating unit comprises a lubricating pump with an inlet connected with the oil pan, a lubricating oil path connected with the outlet of the lubricating pump, an axial tooth lubricating branch connected with an axial tooth lubricating oil injection pipe in parallel connection with the lubricating oil path, and a clutch lubricating branch connected with the clutch; the execution unit comprises an execution pump with an inlet connected with the oil pan and an execution oil path connected with an outlet of the execution pump. The electro-hydraulic control system can cool and lubricate the main speed reducer, and can control the clutch, so that the gear of the main speed reducer can be adjusted.
Description
Technical Field
The invention relates to an electro-hydraulic control system, in particular to an electro-hydraulic control system of a main speed reducer of a rotor aircraft.
Background
Rotorcraft includes both helicopters and autogyro. The reducer, which is an indispensable component of a rotorcraft, has a power input end connected with an engine transmission and a power output end connected with a transmission shaft of a rotor and a tail rotor accessory, is one of main transmission components of a helicopter and is also one of the most complicated, largest and most important components in a transmission device.
The electro-hydraulic control system is a control method capable of receiving analog or digital signals in hydraulic transmission and control to control output flow or pressure in proportion, and is widely applied to various speed reducer lubrication and cooling and gear shifting control systems with the advantages of convenience in operation, high automation degree, stable work and the like.
The electro-hydraulic control system of the existing rotor aircraft main speed reducer mainly has the functions of lubrication and cooling and does not have the capacity of controlling a clutch, so that the control on the gear of the speed reducer cannot be realized. In addition, the electro-hydraulic control system of the existing rotor aviation speed reducer mostly uses a mechanical pump to supply oil independently, and the mechanical oil pump has large discharge capacity and runs continuously, 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 multi-stage redundancy of the electro-hydraulic control system of the prior art rotorcraft final drive is often achieved by using multiple mechanical pumps, which increases the weight of the transmission system while making the transmission system more complex.
Disclosure of Invention
In view of this, the present invention aims to provide an electro-hydraulic control system for a main reducer of a rotary-wing aircraft, so as to cool and lubricate the main reducer and control a clutch.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an electro-hydraulic control system of a main speed reducer of a rotorcraft comprises a lubricating unit for lubricating at least shaft teeth in the main speed reducer and a clutch, and an execution unit for driving the clutch to act;
the lubricating unit comprises a lubricating pump with an inlet connected with the oil pan, a lubricating oil path connected with the outlet of the lubricating pump, an axial tooth lubricating branch connected with an axial tooth lubricating oil injection pipe in parallel connection with the lubricating oil path, and a clutch lubricating branch connected with a clutch, wherein a proportional pressure electromagnetic valve is arranged on the lubricating oil path between the axial 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 path connected with the outlet of the execution pump, and the execution oil path is connected with the clutch.
Furthermore, the inlet of the lubricating pump and/or the execution 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 to the lubricating oil path, and/or a restrictor is connected in parallel to the execution oil path, and outlets of the lubricating pump pressure limiting valve and the restrictor are connected with the oil pan.
Furthermore, an oil cooler and a pressure filter which are sequentially arranged are arranged on the lubricating oil path.
Furthermore, two ends of the oil cooler are connected with a bypass oil way in parallel, and a bypass electromagnetic valve is arranged on the bypass oil way.
Furthermore, a lubricating pressure sensor is arranged on the clutch lubricating branch, a switch electromagnetic valve positioned at the upstream of the oil cooler is arranged on the lubricating oil path, and a first redundant oil path is connected to the switch electromagnetic valve;
the first redundant oil path is connected in parallel to the lubricating oil path between the shaft tooth lubricating branch and the clutch lubricating branch, and the switching electromagnetic valve acts to switch the lubricating pump to be communicated with the first redundant oil path.
Further, a first check valve arranged adjacent to the pressure filter is arranged on the lubricating oil path, and the first check valve is located at the downstream of the pressure filter.
Furthermore, the electro-hydraulic control system further comprises a redundant pump with an inlet connected with the oil pan, a second redundant oil path is connected to an outlet of the redundant pump, the second redundant oil path is connected in parallel to the lubricating oil path between the shaft tooth lubricating branch and the clutch lubricating branch, and a second one-way valve is arranged on the second redundant oil path.
Furthermore, an execution pressure sensor is arranged on the execution oil path, a third redundant oil path is connected in parallel to an outlet of the redundant pump, and the third redundant oil path is connected in parallel to the execution oil path; and a third one-way valve is arranged on the third redundant oil way, and a fourth one-way valve positioned at the upstream of the parallel connection point of the third redundant oil way is arranged on the execution oil way.
Furthermore, the lubrication pump is a mechanical pump, the executive pump and the redundant pump are electronic pumps, and the redundant pump is a two-stage electronic pump.
Compared with the prior art, the invention has the following advantages:
the electro-hydraulic control system of the main speed reducer of the rotor craft can cool and lubricate the shaft teeth and the clutch in the main speed reducer by arranging the lubricating unit for lubricating the shaft teeth and the clutch in the main speed reducer, can drive the clutch to move by arranging the executing unit for driving the clutch to move, realizes the adjustment of the gear of the main speed reducer, and can improve the practicability of the electro-hydraulic control system.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of an electro-hydraulic control system for a rotary-wing aerial craft according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the flow direction of oil when an electro-hydraulic control system of a rotary-wing aircraft retarder lubricates a main retarder through a lubrication oil path according to an embodiment of the invention;
fig. 3 is a schematic diagram illustrating the flow direction of oil when an electro-hydraulic control system of a rotary-wing aircraft retarder lubricates a main retarder through a first redundant oil path according to an embodiment of the invention;
fig. 4 is a schematic diagram illustrating the flow direction of oil when the electro-hydraulic control system of the rotor aviation speed reducer lubricates the main speed reducer through the second redundant oil path according to the embodiment of the invention;
FIG. 5 is a schematic diagram illustrating the flow of oil in an electro-hydraulic control system of a rotorcraft retarder according to an embodiment of the present invention when the clutch is controlled by an actuator circuit;
fig. 6 is a schematic diagram illustrating the oil flow direction when the electro-hydraulic control system of the rotor aviation speed reducer according to the embodiment of the invention controls the clutch through the third redundant oil path.
Description of reference numerals:
1. a lubrication pump; 2. a lubricating oil path; 201. a shaft tooth lubricating branch; 202. a clutch lubrication branch; 3. an oil pan; 4. lubricating an oil injection pipe by using the shaft gear; 5. the clutch lubricates the oil spray pipe;
6. a proportional pressure solenoid valve; 7. an execution pump; 8. an execution oil path; 9. a clutch; 10. a suction filter; 11. a lubrication pump pressure limiting valve; 12. a restrictor; 13. an oil cooler; 14. a filter press;
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 passage; 20. a first check valve; 21. a second one-way valve;
22. a third check valve; 23. a fourth check valve; 24. a redundant pump; 25. a second redundant oil passage; 26. an oil filter; 27. an actuation pressure sensor; 28. a third redundant oil path; 29. an oil level window; 30. a temperature sensor.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element 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 appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.
In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention relates to an electro-hydraulic control system for a main reducer of a rotorcraft, comprising a lubrication unit for lubricating at least the shaft teeth of the main reducer and a clutch 9, and an execution unit for actuating at least the clutch 9.
The lubricating unit comprises a lubricating pump 1 with an inlet connected with an oil pan 3, a lubricating oil path 2 connected with the outlet of the lubricating pump 1, an axle tooth lubricating branch 201 connected with an axle tooth lubricating oil injection pipe 4 and connected with the lubricating oil path 2 in parallel, and a clutch lubricating branch 202 connected with a clutch 9, wherein a proportional pressure electromagnetic valve 6 is arranged on the lubricating oil path 2 between the axle tooth lubricating branch 201 and the clutch lubricating branch 202. The execution unit comprises an execution pump 7 with an inlet connected with the oil pan 3 and an execution oil path 8 connected with an outlet of the execution pump 7, and the execution oil path 8 is connected with a clutch 9.
Based on the above general description, it should be noted that the lubricating unit in the electro-hydraulic control system in this embodiment can lubricate the shaft, the gear and the clutch 9 in the main speed reducer, and can lubricate other elements that need to be lubricated, such as the bearing, etc., only needs to provide the corresponding lubricating branch on the lubricating oil path 2 and provide the oil injection pipe for lubrication at the elements such as the bearing, etc.
Of course, the lubricating unit in this embodiment can cool the shaft, the gear, the clutch 9 and other elements in the final drive in addition to the lubricating function. In addition, in the embodiment, the execution unit can drive the clutch 9 to operate, and can also control other elements to operate, and only a separate execution oil path 8 needs to be arranged between the outlet of the execution pump 7 and the element needing to operate.
The proportional pressure solenoid valve 6 arranged on the lubricating oil path 2 between the shaft tooth lubricating branch 201 and the clutch lubricating branch 202 can adjust the oil flow of the shaft tooth lubricating branch 201 and the clutch lubricating branch 202, and control the distribution of the oil flow of 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 in which the clutch lubrication branch 202 is connected or disconnected. Of course, other types of proportional pressure solenoid valves 6 may be used as desired.
In the present embodiment, the inlets of the lubricating pump 1 and the implement pump 7 are connected to the oil pan 3 through the suction filter 10, and a metal debris detector is provided in the suction filter 10. Through being provided with the fine filter can filter the fluid in the gearbox, help promoting the cleanliness of fluid in the oil circuit. In addition, the metal debris detector in the embodiment can adopt the metal debris detecting part commonly used in the existing engine or transmission lubricating system
The lubricating oil path 2 is connected with a lubricating pump pressure-limiting valve 11 in parallel, the execution oil path 8 is connected with a throttler 12 in parallel, and outlets of the lubricating pump pressure-limiting valve 11 and the throttler 12 are both connected with the oil pan 3. As shown in fig. 1, the lubrication pump pressure limiting valve 11 is disposed near the outlet of the lubrication pump 1, and the lubrication oil path 2 is provided with the lubrication pump pressure limiting valve 11, so that the pressure at the outlet of the lubrication pump 1 can be limited, and when the pressure of the oil in the lubrication oil path 2 at the outlet of the lubrication pump 1 is too high, part of the oil in the lubrication oil path 2 can flow back to the oil pan 3 through the lubrication pump pressure limiting valve 11, thereby reducing the pressure in the lubrication oil path 2, and facilitating the improvement of the reliability of the lubrication unit during operation.
In addition, through having the choke 12 in parallel on carrying out 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 when too high, partial fluid in carrying out oil circuit 8 then can flow back to in the oil pan 3 through choke 12, and then reduces the pressure of carrying out the interior fluid of oil circuit 8, is favorable to promoting the reliability of execution unit work. It should be noted that the pressure limiting valve 11 of the lubrication pump in the present embodiment may be a check valve commonly used in the existing hydraulic system, and the throttle 12 in the present embodiment may be a throttle valve commonly used in the prior art.
As shown in fig. 1, an oil cooler 13 and a pressure filter 14 are provided in this order on the lubricating oil passage 2. The oil in the lubricating oil passage 2 can be cooled by providing the oil cooler 13 so that the oil is maintained at a suitable operating temperature. Through setting up pressure filter 14 then can carry out the fine filtration to the fluid in lubricated oil circuit 2 to further promote the cleanliness of the fluid in lubricated oil circuit 2. Preferably, in the present embodiment, the oil cooler 13 may be an air-cooled oil cooler 13, and the oil cooler 13 in the present embodiment may be a water-cooled oil cooler 13.
Further, a bypass oil passage 15 is connected in parallel to both ends of the oil cooler 13, and a bypass solenoid valve 16 is provided in the bypass oil passage 15. Part of oil in the lubricating oil path 2 joins with the oil after the oil cooler 13 cools through the bypass oil path 15, through setting up the bypass oil path 15 to with be provided with bypass solenoid valve 16 on the bypass oil path 15, and then can be through the break-make of control bypass oil path 15, so that control the fluid flow that gets into the oil cooler 13, thereby supplementary oil cooler 13 carries out work, makes the oil in the lubricating oil path 2 be in suitable operating 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 shown in fig. 1, a lubrication pressure sensor 17 is provided in the clutch lubrication branch 202, and a switching solenoid valve 18 located upstream of the oil cooler 13 is provided in the lubrication oil path 2, and a first redundant oil path 19 is connected to the switching solenoid valve 18. The first redundant oil path 19 is connected in parallel to the lubrication oil path 2 between the gear lubrication branch 201 and the clutch lubrication branch 202, and the switching solenoid valve 18 is operated to switch the lubrication pump 1 to be communicated with the first redundant oil path 19.
The lubricating pressure sensor 17 can monitor the pressure of oil in the lubricating oil circuit 2 in real time, so that whether the work of the electro-hydraulic control system is abnormal or not is judged. When the lubrication pressure sensor 17 gives an alarm, under the control of an external control unit, the operating position of the on-off solenoid valve 18 can be switched, so that the lubrication pump 1 is switched to communicate with the first redundant oil passage 19. As shown in fig. 1, the on-off solenoid valve 18 in the present embodiment may be a two-position three-way on-off solenoid valve 18 having a first operating position at which the outlet of the lubrication pump 1 communicates with the oil cooler 13 and a second operating position at which the outlet of the lubrication pump 1 communicates with the first redundant oil passage 19.
In the present embodiment, a first check valve 20 disposed adjacent to the pressure filter 14 is provided on the lubrication oil passage 2, and the first check valve 20 is located downstream of the pressure filter 14. The first check valve 20 is provided to prevent the oil from flowing back to affect the working efficiency of the electro-hydraulic control system during the oil supply to the shaft tooth lubricating branch 201 through the first redundant oil passage 19 and the second redundant oil passage 25 described below. When the first redundant oil path 19 is switched to lubricate the shaft teeth and the clutch 9 or the second redundant oil path 25 described below is used to lubricate the clutch 9 and the shaft teeth, the oil in the shaft teeth lubricating branch 201 and the clutch lubricating branch 202 can be prevented from flowing into the lubricating oil path 2 and affecting the cooling effect of the clutch 9 and the shaft teeth.
The electro-hydraulic control system further comprises a redundant pump 24 with an inlet connected with the oil pan 3, a second redundant oil path 25 is connected to an outlet of the redundant pump 24, the second redundant oil path 25 is connected to the lubricating oil path 2 between the shaft tooth lubricating branch 201 and the clutch lubricating branch 202 in parallel, and a second one-way valve 21 is arranged on the second redundant oil path 25. Through the setting of second check valve 21, can prevent to flow back to oil pan 3 through the second redundant oil circuit 25 through the fluid in clutch lubrication branch 202 and the first redundant oil circuit 19 in, and reduce this electrohydraulic control system's work efficiency.
Through being provided with second redundant oil circuit 25, then report to the police when lubricated pressure sensor 17, and first redundant oil circuit 19 is unable when using, then can start redundant pump 24, and the import of redundant pump 24 is through oil filter 26 and oil pan 3 intercommunication in, carries fluid to axle teeth lubrication branch 201 and clutch lubrication branch 202 through second redundant oil circuit 25 to the lubrication and the cooling of axle teeth and clutch 9 are realized.
An execution pressure sensor 27 is arranged on the execution oil path 8, a third redundant oil path 28 is connected in parallel at the outlet of the redundant pump 24, and the third redundant oil path 28 is connected in parallel on 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 located upstream of the parallel connection point of the third redundant oil passage 28.
The execution pressure sensor 27 can monitor the oil pressure in the execution oil path 8 in real time, and determine whether the work of the electro-hydraulic control system is abnormal, when the execution pressure sensor 27 gives an alarm, the execution pump 7 stops working under the control of the external control unit, the redundant pump 24 starts working, and 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 implement oil passage 8 during the supply of the oil to the clutch 9 through the third redundant oil passage 28, thereby affecting the operation of the clutch 9 and the operating efficiency of the electro-hydraulic control system. The fourth check valve 23 is provided to prevent the oil from flowing back through the third redundant oil passage 28 during the process of supplying the oil to the clutch 9 through the implement oil passage 8, thereby preventing the operation of the clutch 9 and the operating efficiency of the electrohydraulic control system from being affected.
Further, it should be noted that the lubrication pump 1 in the present embodiment employs a mechanical pump, the implement pump 7 and the redundant pump 24 employ an electronic pump, and the redundant pump 24 employs a two-stage electronic pump. If the lubrication pump 1 may be an external gear pump, the performance pump 7 may be a rotor pump. Through the oil supply mode that adopts mechanical pump and electronic pump cooperation work, can effectively reduce main reducer's complexity and moment of torsion loss to main reducer's work efficiency is promoted. In addition, the two-stage electronic pump in the embodiment is an electronic pump formed by two stages of pump bodies, and can provide larger flow and pressure.
As shown in fig. 1, in the present embodiment, an oil level window 29 is further provided, and the oil level window 29 is disposed 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 as to replenish the oil in the oil pan 3 in time. In the present embodiment, a temperature sensor 30 is further provided, and the temperature of the oil in the oil pan 3 is measured by bringing a sensing end of the temperature sensor 30 into contact with the oil in the oil pan 3.
When the lubricating 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 is pumped into the lubricating oil path 2 by the lubricating pump 1, at this time, the switch electromagnetic valve 18 is in the first working position, and the oil in the lubricating oil path 2 is conveyed into the oil cooler 13 after passing through the switch electromagnetic valve 18.
The oil cooled by the oil cooler 13 is finely filtered by the filter press 14 and enters the shaft tooth lubricating branch 201 and the clutch lubricating branch 202 after passing through the first check valve 20, the oil in the shaft tooth lubricating branch 201 is sprayed out through the shaft tooth lubricating oil spraying pipe 4 to lubricate and cool the shaft teeth in the main speed reducer, and the oil in the clutch lubricating branch 202 lubricates and cools the clutch 9 through the clutch lubricating oil spraying pipe 5 located at the position of the clutch 9.
When the lubricating pressure sensor 17 alarms due to the failure of elements in the lubricating unit, the switching electromagnetic valve 18 can be switched to the second working position under the control of the external control unit, so that the lubricating pump 1 is switched to be communicated with the first redundant oil path 19.
Further, the oil pumped by the lubricating pump 1 can enter the first redundant oil path 19 through the on-off solenoid valve 18, as shown in fig. 3, a part of the oil entering the first redundant oil path 19 passes through the clutch lubricating branch 202 and is sprayed out by the oil spraying pipe of the clutch 9 to lubricate the clutch 9, and the other part of the oil passes through the proportional pressure solenoid valve 6 and enters the shaft tooth lubricating branch 201 and is sprayed out by the shaft tooth lubricating oil spraying pipe 4 to lubricate elements such as a shaft, a gear and a bearing in the main speed reducer.
If the lubrication pressure sensor 17 gives an alarm and the shaft teeth of the final drive and the clutch 9 cannot be lubricated by the first redundant oil passage 19, the shaft, the gear, the clutch 9, and other elements in the final drive can be lubricated by the second redundant oil passage 25.
As shown in fig. 4, at this time, the lubricating pump 1 stops working, and oil is delivered into the second redundant oil path 25 through the redundant pump 24, part of the oil in the second redundant oil path 25 passes through the clutch lubricating 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 lubricating branch 201, and is sprayed out through the shaft tooth lubricating oil spray pipe 4 to lubricate the shaft, the gear and the like in the main speed 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 passage 8 by the execution pump 7, and the oil in the execution oil passage 8 enters the clutch 9 through the fourth check valve 23 to control the action of the clutch 9.
When the pressure sensor 27 is actuated to give an alarm, the oil can be supplied to the clutch 9 through the third redundant oil passage 28, as shown in fig. 6, the actuation pump 7 stops operating 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 passes through the clutch 9, thereby controlling the operation of the clutch 9.
It should be noted that, when the main speed reducer is lubricated through the second redundant oil path, the oil level in the oil pan is generally low, so for the shift control of the clutch, the clutch is also controlled through the third redundant oil path at this time, that is, at this time, the redundant pump 24 simultaneously supplies oil to the shaft tooth lubrication oil injection pipe 4, the clutch lubrication oil injection pipe 5 and the shift control oil path of the clutch, so as to ensure the normal operation of the electro-hydraulic control system.
In addition, the oil in the embodiment can be selected from 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 transmission control unit, which is commonly used in the prior art.
The electro-hydraulic control system of the main reducer of the rotorcraft according to the present embodiment is provided with a lubrication unit that lubricates the shaft teeth of the main reducer and the clutch 9, thereby cooling and lubricating the shaft teeth of the main reducer and the clutch 9. In addition, through being provided with the execution unit that is used for ordering about clutch 9 action, also can realize the regulation to the final drive gear position through ordering about clutch 9 action, and can promote system's practicality.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An electro-hydraulic control system for a main reducer of a rotorcraft, characterized in that:
the lubricating device comprises a lubricating unit for lubricating at least shaft teeth in a main speed reducer and a clutch (9), and an execution unit for driving the clutch (9) to act;
the lubricating unit comprises a lubricating pump (1) with an inlet connected with an oil pan (3), a lubricating oil path (2) connected with an outlet of the lubricating pump (1), an axle tooth lubricating branch (201) connected with an axle tooth lubricating oil injection pipe (4) and connected to the lubricating oil path (2) in parallel, and a clutch lubricating branch (202) connected with a clutch (9), wherein a proportional pressure electromagnetic valve (6) is arranged on the lubricating oil path (2) between the axle tooth lubricating branch (201) and the clutch lubricating branch (202);
the execution unit comprises an execution pump (7) with an inlet connected with the oil pan (3) and an execution oil path (8) connected with an outlet of the execution pump (7), and the execution oil path (8) is connected with the clutch (9).
2. The electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 1, wherein:
the inlet of the lubricating pump (1) and/or the actuating 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 electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 1, wherein:
and the lubricating oil way (2) is connected with a lubricating pump pressure-limiting valve (11) in parallel, and/or the execution 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 electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 1, wherein:
and an oil cooler (13) and a pressure filter (14) which are sequentially arranged are arranged on the lubricating oil path (2).
5. The electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 4, wherein:
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).
6. The electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 4, wherein:
a lubricating pressure sensor (17) is arranged on the clutch lubricating branch (202), a switching electromagnetic valve (18) positioned at the upstream of the oil cooler (13) is arranged on the lubricating oil path (2), and a first redundant oil path (19) is connected to the switching electromagnetic valve (18);
the first redundant oil path (19) is connected in parallel to the lubricating oil path (2) between the shaft tooth lubricating branch (201) and the clutch lubricating branch (202), and the switching electromagnetic valve (18) acts to switch the lubricating pump (1) to be communicated with the first redundant oil path (19).
7. The electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 6, wherein:
and a first one-way valve (20) arranged adjacent to the pressure filter (14) is arranged on the lubricating oil path (2), and the first one-way valve (20) is positioned at the downstream of the pressure filter (14).
8. The electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 6, wherein:
the electro-hydraulic 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 path (25), the second redundant oil path (25) is connected in parallel to the lubricating oil path (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 path (25).
9. The electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 8, wherein:
an execution pressure sensor (27) is arranged on the execution oil path (8), a third redundant oil path (28) is connected in parallel at the outlet of the redundant pump (24), and the third redundant oil path (28) is connected in parallel on the execution oil path (8);
and a third one-way valve (22) is arranged on the third redundant oil way (28), and a fourth one-way valve (23) which is positioned at the upstream of the parallel connection point of the third redundant oil way (28) is arranged on the execution oil way (8).
10. The electro-hydraulic control system for a rotary-wing aircraft final drive according to claim 9, 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 double-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 |
|---|---|---|---|
| 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 CN114427599B (en) | 2024-02-06 |
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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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| CN114427599B (en) | 2024-02-06 |
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