CN109555602B - Oil return system of transmission box - Google Patents
Oil return system of transmission box Download PDFInfo
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- CN109555602B CN109555602B CN201811504707.0A CN201811504707A CN109555602B CN 109555602 B CN109555602 B CN 109555602B CN 201811504707 A CN201811504707 A CN 201811504707A CN 109555602 B CN109555602 B CN 109555602B
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- transmission box
- well pump
- box body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
Abstract
The invention provides a transmission box oil return system which comprises a transmission box body and a transmission box oil pumping device, wherein the transmission box oil pumping device comprises an oil well pump for pumping lubricating oil from the transmission box body through an oil path and outputting the lubricating oil in a pumping mode, a driving mechanism for driving an oil well pump to work and a driving selection mechanism for selecting the driving mechanism to drive the oil well pump to work or an aeroengine to drive the oil well pump to work, the oil path comprises a first oil path communicated with an oil receiving pool of an accessory transmission box and a second oil path communicated with a lubricating oil tank of the aeroengine, and the transmission box oil pumping device further comprises an oil path selection mechanism for selecting the oil well pump to be communicated with the first oil path or the second oil path. The different oil paths are selected by the oil path selection mechanism in different running states of the aero-engine, so that the lubricating oil in the transmission box body is pumped back to the oil collecting pool of the accessory transmission casing when the aero-engine runs and pumped back to the lubricating oil tank of the aero-engine when the aero-engine stops running.
Description
Technical Field
The invention relates to the technical field of accessory transmission of aero-engines, in particular to an oil return system of a transmission box.
Background
The accessory transmission case of the aircraft engine is used for transmission and installation of accessories, when the aircraft engine needs to transmit and install more accessories, the accessory transmission case is difficult to bear, and a transmission box accessory transmission mechanism needs to be designed for transmission and installation of auxiliary accessories.
In order to meet the requirements of the aircraft engine, the lubricating oil in the transmission box body needs to be pumped back into an oil collecting pool of the accessory transmission case when the aircraft engine runs, and the lubricating oil in the transmission box body needs to be pumped back into a lubricating oil tank of the aircraft engine when the aircraft engine stops running.
Disclosure of Invention
The invention provides a transmission box oil return system, which aims to solve the problems of pumping lubricating oil in a transmission box body back to an oil collecting pool of an accessory transmission case when an aeroengine runs and pumping lubricating oil in the transmission box body back to a lubricating oil tank of the aeroengine when the aeroengine stops running.
The technical scheme adopted by the invention is as follows:
the transmission box oil pumping device comprises an oil well pump for pumping lubricating oil from the transmission box body through an oil path and outputting the lubricating oil in a pumping mode, a driving mechanism for driving the oil well pump to work and a driving selection mechanism for selecting the driving mechanism to drive the oil well pump to work or an aeroengine to drive the oil well pump to work, wherein the oil path comprises a first oil path communicated with an oil receiving pool of an accessory transmission box and a second oil path communicated with a lubricating oil tank of the aeroengine, and the transmission box oil pumping device further comprises an oil path selection mechanism for selecting the oil well pump to be communicated with the first oil path or the second oil path.
Furthermore, the oil well pump comprises an oil well pump shell used for forming an oil pumping space, a rotor arranged in the oil well pump shell and a transmission shaft used for driving the rotor to rotate, wherein the oil well pump shell is provided with an oil inlet and an oil outlet which are respectively communicated with the oil way.
Furthermore, the rotor comprises an inner rotor and an outer rotor, wherein the inner rotor is driven by the transmission shaft to rotate, the outer rotor is arranged eccentrically to the inner rotor, the inner rotor is provided with cycloid gear teeth, the outer rotor is provided with arc gear teeth, and the number of the gear teeth of the inner rotor is one less than that of the gear teeth of the outer rotor.
Further, the driving mechanism adopts a motor for driving the transmission shaft to rotate, and the motor is connected with the transmission shaft through the shearing pin.
Furthermore, a transmission gear matched with a transmission chain of the aircraft engine is sleeved on the transmission shaft.
Furthermore, the transmission box oil pumping device also comprises a rotating speed sensor for measuring the rotating speed of the transmission gear; the drive selection mechanism adopts an overrunning clutch arranged between the transmission shaft and the transmission gear.
Furthermore, the oil path selection mechanism adopts an electromagnetic valve arranged at the communication position of the first oil path and the second oil path, and a pipe joint used for being communicated to a lubricating oil tank of the aircraft engine is arranged on the electromagnetic valve.
Furthermore, the transmission box body comprises a transmission box shell and a transmission box cover, the transmission box shell is used for being installed on the accessory transmission case, the transmission box cover is used for being closed with the transmission box shell to form the transmission box body, an oil inlet hole used for guiding lubricating oil in the accessory transmission case into the transmission box body, an oil pump installation seat used for installing an oil pump and a through hole used for enabling a transmission chain of an aircraft engine to penetrate through and enter the transmission box body are formed in the transmission box shell, and a first oil path, a second oil path and an oil path selection mechanism installation seat used for installing an oil path selection mechanism are all arranged on the transmission box shell.
Furthermore, the first oil path comprises an oil suction hole for guiding the lubricating oil in the transmission box body into the oil well pump, a channel communicated with the output end of the oil well pump and an oil return hole communicated with the output end of the channel.
Further, the second oil path includes an oil suction hole, a passage, and an oil outlet hole for communicating with an output end of the passage.
The invention has the following beneficial effects:
the invention relates to a transmission box oil return system which comprises a transmission box body and a transmission box oil pumping device. The transmission box oil pumping device comprises an oil well pump, a driving mechanism, a driving selection mechanism and an oil path selection mechanism. When the aircraft engine runs normally, the drive selection mechanism selects the aircraft engine to drive the oil pump to work, the oil circuit selection mechanism selects the oil well pump to be communicated with the first oil circuit, and the oil well pump pumps lubricating oil from the transmission box body through the first oil circuit and pumps the lubricating oil to the oil receiving pool of the accessory transmission box. When the aero-engine stops running, the drive selection mechanism selects the oil pump driven by the drive mechanism to work, the oil circuit selection mechanism selects the oil pump to be communicated with the second oil circuit, and the oil pump pumps lubricating oil from the transmission box body through the second oil circuit and pumps the lubricating oil to the lubricating oil tank of the aero-engine. The drive mechanism provides power for the oil well pump when the aero-engine stops running, the drive selection mechanism is used for carrying out drive selection on the oil well pump, and different oil ways are selected by the oil way selection mechanism when the aero-engine is in different running states, so that the lubricating oil in the transmission box body is pumped back to the oil collecting pool of the accessory transmission box when the aero-engine runs and pumped back to the lubricating oil tank of the aero-engine when the aero-engine stops running by the same system, and the size of the accessory transmission mechanism of the transmission box is reduced. The transmission box oil return system can meet the use requirement of an aero-engine through trial run verification, and has good application prospect and social benefit.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments 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 one of the schematic views of a transmission case pumping unit in accordance with a preferred embodiment of the present invention;
FIG. 2 is a second schematic view of the pumping unit of the transmission case of the preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of the operation of an oil well pump in accordance with a preferred embodiment of the present invention;
FIG. 4 is a schematic view of the exterior surface of the transmission case housing of the preferred embodiment of the present invention;
FIG. 5 is a schematic view of the inner surface of the transmission case housing of the preferred embodiment of the present invention;
FIG. 6 is a schematic illustration of an oil circuit of the preferred embodiment of the present invention;
FIG. 7 is a schematic view of the inside surface of the transmission cover of the preferred embodiment of the present invention;
FIG. 8 is a schematic view of the exterior surface of the transmission cover of the preferred embodiment of the present invention.
Description of reference numerals:
1. a transmission box body; 11. a transmission case housing; 111. an oil inlet hole; 112. an oil pump mounting base; 113. a through hole; 1141. an oil suction hole; 1142. a channel; 1143. an oil return hole; 1144. an oil outlet hole; 115. an oil path selection mechanism mounting base; 116. a first central gear bearing mount; 117. a first main fuel pump gear bearing block; 118. a first hydraulic pump gear bearing seat; 119. a rotation speed sensor mounting base; 1110. a first positioning flange; 1111. a first dowel hole; 1112. a first bolt hole; 12. a transmission box cover; 121. a second central gear bearing mount; 122. a main fuel pump mounting base; 123. a second main fuel pump gear bearing seat; 124. an auxiliary fuel pump mounting seat; 125. an auxiliary fuel pump gear bearing seat; 126. a medium gear shaft mounting seat; 127. a hydraulic pump mounting base; 128. a second hydraulic pump gear bearing seat; 129. a second positioning flange; 1210. a second dowel hole; 1211. a second bolt hole; 1212. a threaded hole; 2. an oil well pump; 21. a housing of the oil well pump; 211. an oil inlet; 212. an oil outlet; 22. an inner rotor; 23. an outer rotor; 24. a drive shaft; 25. a transmission gear; 26. a rotational speed sensor; 31. a motor; 32. a shear pin; 41. an overrunning clutch; 51. an electromagnetic valve; 52. a pipe joint.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 and 2, the transmission case oil return system of the embodiment includes a transmission case body 1 and a transmission case oil pumping device, the transmission case oil pumping device includes an oil pump 2 for pumping lubricating oil from the transmission case body 1 through an oil path and outputting the lubricating oil by pumping, a driving mechanism for driving the oil pump 2 to work, and a driving selection mechanism for selecting the driving mechanism to drive the oil pump 2 to work or the aero-engine to drive the oil pump 2 to work, the oil path includes a first oil path for communicating with an oil receiving pool of the accessory transmission case and a second oil path for communicating with a lubricating oil tank of the aero-engine, and the transmission case oil pumping device further includes an oil path selection mechanism for selecting the oil pump 2 to communicate with the first oil path or the second oil path. The transmission box oil return system comprises a transmission box body 1 and a transmission box oil pumping device, wherein the transmission box oil pumping device comprises an oil well pump 2, a driving mechanism, a driving selection mechanism and an oil way selection mechanism. When the aircraft engine normally runs, the drive selection mechanism selects the aircraft engine to drive the oil pump 2 to work, the oil circuit selection mechanism selects the oil pump 2 to be communicated with the first oil circuit, and the oil pump 2 pumps lubricating oil from the transmission box body 1 through the first oil circuit and pumps the lubricating oil to the oil collecting pool of the accessory transmission box. When the aero-engine stops running, the drive selection mechanism selects the oil well pump 2 driven by the drive mechanism to work, the oil path selection mechanism selects the oil well pump 2 to be communicated with the second oil path, and the oil well pump 2 pumps lubricating oil from the transmission box body 1 through the second oil path and pumps the lubricating oil to the lubricating oil tank of the aero-engine. The drive mechanism provides power for the oil well pump 2 when the aero-engine stops running, the drive selection mechanism is used for carrying out drive selection on the oil well pump 2, different oil ways are selected by the oil way selection mechanism in different running states of the aero-engine, the lubricating oil in the transmission box body 1 is pumped back to an oil collecting pool of the accessory transmission case when the aero-engine runs and the lubricating oil in the transmission box body 1 is pumped back to an oil tank of the aero-engine when the aero-engine stops running by the same system, and the size of the transmission box accessory transmission mechanism is reduced. The transmission box oil return system can meet the use requirement of an aero-engine through trial run verification, and has good application prospect and social benefit.
As shown in fig. 2, in the present embodiment, the oil pump 2 includes an oil pump housing 21 for forming an oil pumping space, a rotor disposed in the oil pump housing 21, and a transmission shaft 24 for driving the rotor to rotate, and the oil pump housing 21 is provided with an oil inlet 211 and an oil outlet 212 respectively communicated with an oil path. The transmission shaft 24 rotates to drive the rotor to rotate, the rotor rotates to enable the lubricating oil in the transmission box body 1 to be sucked into the oil well pump shell 21 from the oil inlet 211, and then the lubricating oil is discharged out of the oil well pump shell 21 through the oil outlet 212.
As shown in fig. 2 and 3, in the present embodiment, the rotor includes an inner rotor 22 rotated by a transmission shaft 24 and an outer rotor 23 disposed eccentrically to the inner rotor 22, the inner rotor 22 has cycloid-shaped gear teeth, the outer rotor 23 has circular-arc-shaped gear teeth, and the number of the gear teeth of the inner rotor 22 is one less than that of the outer rotor 23. The teeth of the inner rotor 22 and the outer rotor 23 are partitioned into a plurality of oil chambers. The inner rotor 22 is rotated by the transmission shaft 24, and the outer rotor 23 is also rotated in the same direction as the inner rotor 22. The volume of the oil chamber exiting the meshing range is increased from small to large, the pressure in the oil chamber is reduced, and the lubricating oil is sucked into the oil chamber from the oil inlet 211. Then the oil chamber enters the meshing range, the volume of the oil chamber is gradually reduced, and the lubricating oil is extruded out of the oil chamber and flows out of the oil outlet 212.
As shown in fig. 1 and 2, in the present embodiment, the driving mechanism employs a motor 31 for driving the transmission shaft 24 to rotate. The motor 31 is connected to the drive shaft 24 by a shear pin 32. The shear pin 32 is used for connecting the motor 31 and the transmission shaft 24, and is also used for realizing the functions of transmission torque and overload protection. When the power transmitted to the oil well pump 2 by the motor 31 through the transmission shaft 24 exceeds a specified value or the motor 31 is over-twisted due to other reasons, the shearing pin 32 is broken, so that the motor 31 is separated from the oil well pump 2, and the oil well pump 2 is protected from being damaged.
As shown in fig. 2, in the present embodiment, a transmission gear 25 for cooperating with a transmission chain of an aircraft engine is sleeved on the transmission shaft 24. The transmission gear 25 is matched with a transmission chain of the aero-engine, so that the aero-engine drives the transmission shaft 24 to rotate, and the oil well pump 2 is driven to work. The drive-box pumping unit further comprises a rotational speed sensor 26 for measuring the rotational speed of the drive gear 25. The rotation speed sensor 26 may measure the rotation speed of the transmission gear 25 in order to monitor whether the rotation speed of the transmission gear 25 is normal.
As shown in fig. 2, in the present embodiment, the drive selection mechanism employs an overrunning clutch 41 provided between the transmission shaft 24 and the transmission gear 25. When the aircraft engine runs normally, a transmission chain of the aircraft engine is matched with the transmission gear 25, a driving part and a driven part of the overrunning clutch 41 are combined, and the transmission gear 25 drives the overrunning clutch 41 and the transmission shaft 24 to rotate, so that the oil well pump 2 is driven to work. When the aero-engine stops running, the driving part and the driven part of the overrunning clutch 41 are disengaged, and the motor 31 drives the oil well pump 2 to work.
As shown in fig. 1, in the present embodiment, the oil passage selection mechanism employs an electromagnetic shutter 51 provided at the communication between the first oil passage and the second oil passage. When the aircraft engine runs normally, the electromagnetic valve 51 cuts off the second oil path and opens the first oil path. When the aero-engine stops operating, the electromagnetic valve 51 cuts off the first oil path and opens the second oil path. The electromagnetic valve 51 is provided with a pipe joint 52 for communicating with a fuel tank of the aircraft engine. The pipe connector 52 is used to connect the pipe to the fuel tank of the aircraft engine.
As shown in fig. 4 and 8, in this embodiment, the transmission case body 1 includes a transmission case housing 11 for being mounted on the accessory transmission casing and a transmission case cover 12 for being closed with the transmission case housing 11 to form the transmission case body 1, the transmission case housing 11 is provided with an oil inlet 111 for guiding lubricating oil in the accessory transmission casing into the transmission case body 1, an oil pump mounting seat 112 for mounting the oil pump 2, and a through hole 113 for allowing a transmission chain of the aircraft engine to pass through and enter the transmission case body 1, and the first oil path, the second oil path, and an oil path selection mechanism mounting seat 115 for mounting the oil path selection mechanism are all disposed on the transmission case housing 11. The transmission box body comprises a transmission box shell 11 and a transmission box cover 12. The transmission box shell 11 can be fixed on the accessory transmission casing through bolts, and the transmission box shell 11 and the transmission box cover 12 are closed to form the transmission box body 1. An oil inlet hole 111, an oil pump mounting seat 112 and a through hole 113 are formed in the transmission box shell 11, lubricating oil in the accessory transmission casing enters the transmission box body 1 through the oil inlet hole 111, the oil pump mounting seat 112 is used for mounting the oil pump 2, a driving mechanism is arranged on the oil pump 2, and the through hole 113 is convenient for a transmission chain of an aircraft engine to enter the transmission box body 1 to drive the oil pump 2 to work. The transmission case shell 11 is further provided with a first oil path, a second oil path and an oil path selection mechanism mounting seat 115, and the oil path selection mechanism mounting seat 115 is used for mounting an oil path selection mechanism. When the aircraft engine normally runs, the aircraft engine drives the oil well pump 2 to work, the oil path selection mechanism selects the oil well pump 2 to be communicated with the first oil path, and the oil well pump 2 pumps lubricating oil from the transmission box body 1 through the first oil path and pumps the lubricating oil to the oil collecting pool of the accessory transmission case. When the aero-engine stops running, the driving mechanism drives the oil well pump 2 to work, the oil path selection mechanism selects the oil well pump 2 to be communicated with the second oil path, and the oil well pump 2 pumps lubricating oil from the transmission box body 1 through the second oil path and pumps the lubricating oil to the lubricating oil tank of the aero-engine. Different oil paths are selected by the oil path selection mechanism in different running states of the aero-engine, so that the lubricating oil in the transmission box body 1 is pumped back to an oil collecting pool of the accessory transmission casing when the aero-engine runs, and the lubricating oil in the transmission box body 1 is pumped back to a lubricating oil tank of the aero-engine when the aero-engine stops running. The transmission box body has light weight, small volume and reliable work, meets the requirements of transmission and installation of accessories and oil return of lubricating oil, and has good application prospect and social benefit.
As shown in fig. 4, 5 and 6, in this embodiment, the first oil path includes an oil suction hole 1141 for guiding the lubricating oil in the transmission case 1 into the oil pump 2, a passage 1142 communicating with the output end of the oil pump 2, and an oil return hole 1143 for communicating with the output end of the passage 1142. The lubricating oil in the transmission box body 1 is sucked into the oil well pump 2 through the oil suction hole 1141, and the oil well pump 2 pumps and outputs the lubricating oil to an oil collecting pool of the accessory transmission casing through the channel 1142 and the oil return hole 1143.
As shown in fig. 4, 5 and 6, in the present embodiment, the second oil path includes an oil suction hole 1141, a channel 1142 and an oil discharge hole 1144 for communicating with an output end of the channel 1142. The lubricating oil in the transmission box body 1 is sucked into the oil well pump 2 through the oil suction hole 1141, and the oil well pump 2 pumps and outputs the lubricating oil to a lubricating oil tank of the aircraft engine through the channel 1142 and the oil outlet hole 1144.
As shown in fig. 5 and 7, in the present embodiment, a first center gear seat 116 for mounting a center gear shaft is provided on the inner surface of the transmission case housing 11, and a second center gear seat 121 for mounting a center gear shaft is provided on the inner surface of the transmission case cover 12. The central gear shaft is mounted in the drive case 1 by means of a first central gear bearing block 116 and a second central gear bearing block 121.
As shown in fig. 5, 7 and 8, in the present embodiment, a main fuel pump mounting seat 122 for mounting a main fuel pump is provided on an outer surface of the transmission case cover 12, a first main fuel pump gear bearing seat 117 for mounting a gear shaft of the main fuel pump is provided on an inner surface of the transmission case housing 11, and a second main fuel pump gear bearing seat 123 for mounting a gear shaft of the main fuel pump is provided on an inner surface of the transmission case cover 12. The main fuel pump is installed outside the transmission box body 1 through the main fuel pump installation seat 122, a mounting hole is formed in the main fuel pump installation seat 122, a gear shaft of the main fuel pump extends into the transmission box body 1 through the mounting hole, and a gear shaft of the main fuel pump is installed in the transmission box body 1 through the first main fuel pump gear bearing seat 117 and the second main fuel pump gear bearing seat 123.
As shown in fig. 7 and 8, in the present embodiment, an auxiliary fuel pump mounting seat 124 for mounting an auxiliary fuel pump is provided on an outer surface of the transmission case cover 12, and an auxiliary fuel pump gear bearing seat 125 for mounting a gear shaft of the auxiliary fuel pump is provided on an inner surface of the transmission case cover 12. The auxiliary fuel pump is installed outside the transmission box body 1 through the auxiliary fuel pump gear bearing seat 125, a mounting hole is formed in the auxiliary fuel pump gear bearing seat 125, a gear shaft of the auxiliary fuel pump extends into the transmission box body 1 through the mounting hole, and a gear shaft of the auxiliary fuel pump is installed in the transmission box body 1 through the auxiliary fuel pump gear bearing seat 125.
As shown in fig. 8, in the present embodiment, an intermediate gear shaft mounting seat 126 for mounting an intermediate gear shaft is provided on the outer surface of the transmission case cover 12. The mounting hole is arranged on the mounting seat 126 of the medium gear shaft, the medium gear shaft extends into the transmission box body 1 through the mounting hole, and the medium gear shaft is mounted on the transmission box cover 12 through the mounting seat 126 of the medium gear shaft.
As shown in fig. 5, 7 and 8, in the present embodiment, a hydraulic pump mounting seat 127 for mounting a hydraulic pump is provided on an outer surface of the transmission case cover 12, a first hydraulic pump gear bearing seat 118 for mounting a gear shaft of the hydraulic pump is provided on an inner surface of the transmission case housing 11, and a second hydraulic pump gear bearing seat 128 for mounting a gear shaft of the hydraulic pump is provided on an inner surface of the transmission case cover 12. The hydraulic pump passes through hydraulic pump mount pad 127 to be installed outside transmission box body 1, has seted up the mounting hole on the hydraulic pump mount pad 127, and in the gear shaft of hydraulic pump stretched into transmission box body 1 through the mounting hole, the gear shaft of hydraulic pump was installed in transmission box body 1 through first hydraulic pump gear bearing frame 118 and second hydraulic pump gear bearing frame 128.
In this embodiment, a drive chain of the aircraft engine in the accessory drive case is connected to the central gear shaft and drives the central gear shaft to rotate, the central gear shaft drives the gear shaft of the main fuel pump, the gear shaft of the auxiliary fuel pump and the intermediate gear shaft to rotate through the gears, the main fuel pump provides fuel for the aircraft engine, and the auxiliary fuel pump provides fuel for the main fuel pump. The intermediate gear shaft drives the transmission shaft 24 to rotate through the matching of the gear and the transmission gear 25, so that the aero-engine drives the oil well pump 2 to work. The gear shaft of the hydraulic pump is driven to rotate by the intermediary gear shaft through the gear, and the hydraulic pump boosts lubricating oil in a lubricating oil tank of the aircraft engine and then supplies the pressurized lubricating oil to a hydraulic system of the aircraft. The oil pump 2 and the hydraulic pump are provided with proper rotating speed through the intermediate gear shaft.
As shown in fig. 5, in the present embodiment, a rotational speed sensor mounting seat 119 for mounting the rotational speed sensor 26 is provided on the inner surface of the transmission case housing 11. The rotation speed sensor 26 is installed outside the transmission case body 1 through a rotation speed sensor installation seat 119 and is used for measuring the rotation speed of the transmission gear 25.
As shown in fig. 4, fig. 5, fig. 7 and fig. 8, in this embodiment, a first positioning flange 1110 is disposed on the transmission case housing 11, a second positioning flange 129 is disposed on the transmission case cover 12, a plurality of first positioning pin holes 1111 are disposed on the first positioning flange 1110, a plurality of second positioning pin holes 1210 corresponding to the first positioning pin holes 1111 for positioning the transmission case housing 11 and the transmission case cover 12 are disposed on the second positioning flange 129, a plurality of first bolt holes 1112 are disposed on the first positioning flange 1110, a plurality of second bolt holes 1211 corresponding to the first bolt holes 1112 for closing the transmission case housing 11 and the transmission case cover 12 are disposed on the second positioning flange 129, and a plurality of threaded holes 1212 for disassembling the transmission case housing 11 and the transmission case cover 12 are disposed on the second positioning flange 129. The transmission case housing 11 and the transmission case cover 12 are positioned by aligning the first positioning pin hole 1111 and the second positioning pin hole 1210 and inserting the positioning pin into the first positioning pin hole 1111 and the second positioning pin hole 1210. Bolts are then inserted through the first and second bolt holes 1112, 1211 to secure the transmission case housing 11 and transmission case cover 12 closed. When the transmission case housing 11 and the transmission case cover 12 are closed, a sealant is further coated on the first positioning flange 1110 and the second positioning flange 129 to improve the sealing performance. When the transmission case body 11 and the transmission case cover 12 need to be disassembled, the screws are screwed into the threaded holes 1212, and the screws are abutted against the first positioning flange 1110, so that the transmission case body 11 and the transmission case cover 12 are disassembled.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A transmission box oil return system comprises a transmission box body (1) and a transmission box oil pumping device, and is characterized in that,
the transmission box oil pumping device comprises an oil well pump (2) for pumping lubricating oil from the transmission box body (1) through an oil way and outputting the lubricating oil by pumping, a driving mechanism for driving the oil well pump (2) to work and a driving selection mechanism for selecting the driving mechanism to drive the oil well pump (2) to work or selecting an aero-engine to drive the oil well pump (2) to work,
the oil circuit comprises a first oil circuit communicated with an oil receiving pool of the accessory transmission casing and a second oil circuit communicated with a lubricating oil tank of the aero-engine, and the transmission box oil pumping device further comprises an oil circuit selection mechanism used for selecting the oil well pump (2) to be communicated with the first oil circuit or the second oil circuit.
2. The drive cage oil return system of claim 1,
the oil well pump (2) comprises an oil well pump shell (21) for forming an oil pumping space, a rotor arranged in the oil well pump shell (21) and a transmission shaft (24) for driving the rotor to rotate,
and an oil inlet (211) and an oil outlet (212) which are respectively communicated with the oil way are arranged on the oil well pump shell (21).
3. The drive cage oil return system of claim 2,
the rotor include by transmission shaft (24) drive rotatory inner rotor (22) and with outer rotor (23) of inner rotor (22) eccentric settings, inner rotor (22) have cycloid shape teeth of a cogwheel, outer rotor (23) have circular arc teeth of a cogwheel, the teeth of a cogwheel quantity of inner rotor (22) is less than the teeth of a cogwheel quantity of outer rotor (23) by one.
4. The drive cage oil return system of claim 2,
the driving mechanism adopts a motor (31) for driving the transmission shaft (24) to rotate, and the motor (31) is connected with the transmission shaft (24) through a shearing pin (32).
5. The drive cage oil return system of claim 2,
and a transmission gear (25) matched with a transmission chain of the aero-engine is sleeved on the transmission shaft (24).
6. The drive cage oil return system of claim 5,
the transmission box oil pumping device also comprises a rotating speed sensor (26) for measuring the rotating speed of the transmission gear (25);
the drive selection mechanism adopts an overrunning clutch (41) arranged between the transmission shaft (24) and the transmission gear (25).
7. The drive cage oil return system of claim 1,
the oil path selection mechanism adopts an electromagnetic valve (51) arranged at the communication position of the first oil path and the second oil path, and a pipe joint (52) used for being communicated with a lubricating oil tank of the aircraft engine is arranged on the electromagnetic valve (51).
8. The drive cage oil return system of claim 1,
the transmission box body (1) comprises a transmission box shell (11) arranged on the accessory transmission casing and a transmission box cover (12) used for being closed with the transmission box shell (11) to form the transmission box body (1),
an oil inlet hole (111) for guiding lubricating oil in the accessory transmission casing into the transmission box body (1), an oil pump mounting seat (112) for mounting the oil pump (2) and a through hole (113) for a transmission chain of the aircraft engine to penetrate through and enter the transmission box body (1) are arranged on the transmission box shell (11),
the first oil path, the second oil path and an oil path selection mechanism mounting seat (115) for mounting the oil path selection mechanism are all arranged on the transmission box shell (11).
9. The drive cage oil return system of claim 8,
the first oil path comprises an oil suction hole (1141) for guiding lubricating oil in the transmission box body (1) into the oil well pump (2), a channel (1142) communicated with the output end of the oil well pump (2), and an oil return hole (1143) communicated with the output end of the channel (1142).
10. The drive cage oil return system of claim 9,
the second oil path includes the oil suction hole (1141), the channel (1142), and an oil outlet hole (1144) for communicating with an output end of the channel (1142).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504707.0A CN109555602B (en) | 2018-12-10 | 2018-12-10 | Oil return system of transmission box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504707.0A CN109555602B (en) | 2018-12-10 | 2018-12-10 | Oil return system of transmission box |
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| CN109555602A CN109555602A (en) | 2019-04-02 |
| CN109555602B true CN109555602B (en) | 2020-02-04 |
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| CN201811504707.0A Active CN109555602B (en) | 2018-12-10 | 2018-12-10 | Oil return system of transmission box |
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|---|---|---|---|---|
| US6735952B2 (en) * | 2001-09-26 | 2004-05-18 | Ingersoll-Rand Energy Systems | Single pump lubrication and starter system |
| CN204358404U (en) * | 2014-12-23 | 2015-05-27 | 中国南方航空工业(集团)有限公司 | A kind of built-in oil well pump |
| FR3031786B1 (en) * | 2015-01-19 | 2018-11-02 | Safran Transmission Systems | INTEGRATION OF A PUMP IN FUT OF PINION |
| CN107202155B (en) * | 2017-06-02 | 2019-09-20 | 中国航发南方工业有限公司 | Aircraft engine accessory drive mechanism |
| CN207304283U (en) * | 2017-09-04 | 2018-05-01 | 中国航发南方工业有限公司 | It is driven wheel chamber casing |
-
2018
- 2018-12-10 CN CN201811504707.0A patent/CN109555602B/en active Active
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| CN109555602A (en) | 2019-04-02 |
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