An aero dual bearing oil return rate analysis experimental device

Abstract

The application belongs to the technical field of bearing lubrication test, and discloses an aviation double-bearing oil return rate analysis experimental device, which comprises a motor driving module, an experimental box module, a nozzle adjusting module, a lubricating oil collecting module and a rotating platform. The motor driving module is used for providing power for the rotation of the experimental bearing. The nozzle adjusting module is used for adjusting the position of the nozzle so that the nozzle is aligned with the incident point under different lubrication modes. The experimental box module comprises an experimental box body, an experimental bearing, a transmission shaft, a transmission bearing and a nozzle baffle. The lubricating oil collecting module is used for collecting the weight data of the lubricating oil flowing out of the two bearing cavities within a certain time. The rotating platform is used for realizing the attitude change of the experimental bearing. The application can be used for measuring the oil return rates of the two sides of the double-bearing combination under different lubrication modes, and can analyze the change rule of the bearing cavity oil return rate under different attitudes, thereby guiding the structural design of the aviation lubrication system.

Description

Technical Field

[0001] This invention belongs to the field of bearing lubrication testing technology, specifically relating to an experimental device for analyzing the oil return rate of dual aerospace bearings. Background Technology

[0002] In the design of aero-engine transmission systems, bearing lubrication performance directly affects the reliability and lifespan of the equipment. Dual-bearing structures (such as combinations of deep groove ball bearings and cylindrical roller bearings) are widely used in critical aerospace components, and their lubrication efficiency directly impacts friction loss, temperature rise control, and overall mechanical efficiency. However, traditional lubrication system design faces significant challenges: under complex aircraft attitudes (such as takeoff, climb, cruise, or maneuvering), changes in gravity direction cause dynamic changes in the distribution and return flow of lubricating oil within the bearing cavity, thus affecting lubrication stability and cooling effectiveness. Existing bearing lubrication experimental devices mainly consist of a motor, drive shaft, experimental chamber, oil spray base, and experimental bearings. Bearing lubrication methods include side-spray lubrication and under-ring lubrication, with oil return devices installed at both ends of the bearing. The shortcomings of existing technologies are that current bearing lubrication experimental devices only target single bearings and cannot test the oil return rate of dual-bearing transmission structures; the lubrication methods only involve oil injection lubrication and under-ring lubrication, and cannot analyze the bearing oil return rate when dual bearings use outer ring lubrication and inter-bearing jet lubrication; the bearing operating attitude is fixed and cannot simulate the changes in bearing oil return rate caused by attitude changes during flight.

[0003] Therefore, a new experimental device for analyzing the oil return rate of dual bearings in aerospace is needed. Summary of the Invention

[0004] The purpose of this invention is to provide an experimental device for analyzing the oil return rate of dual bearings in aviation, in order to solve the problems proposed in the background art. Existing bearing lubrication experimental devices only target a single bearing and cannot test the oil return rate of dual bearing transmission structures; the lubrication methods only involve oil injection lubrication and under-ring lubrication, and cannot analyze the bearing oil return rate when dual bearings use outer ring lubrication and inter-bearing jet lubrication; and the bearing operating attitude is fixed, making it impossible to simulate the bearing oil return rate changes caused by attitude changes during flight.

[0005] To achieve the above objectives, the present invention provides an experimental device for analyzing the oil return rate of dual bearings in aviation, comprising a motor drive module, an experimental chamber module, a nozzle adjustment module, a lubricating oil collection module, and a rotating platform; the motor drive module, the experimental chamber module, and the nozzle adjustment module are all mounted on the rotating platform;

[0006] The motor drive module is used to provide power for the rotation of the experimental bearing; the nozzle adjustment module includes a nozzle, and the nozzle adjustment module adjusts the position of the nozzle to make the nozzle aligned with the injection point under different lubrication methods.

[0007] The experimental chamber module includes an experimental chamber body, experimental bearings, a drive shaft, a transmission bearing, and a nozzle baffle. A transmission bearing is mounted on one side of the experimental chamber body, and a nozzle baffle is mounted on the other side. An experimental bearing seat for mounting the experimental bearing is located in the middle of the experimental chamber body. The front panel, rear panel, and top panel of the experimental chamber body are all enclosed by transparent panels. The experimental bearing seat inside the experimental chamber body has bearing cavities on both sides, with oil return ports at the bottom of the bearing cavities. Two internal hexagonal holes are pre-drilled at the top of the experimental bearing seat. An annular groove is provided on the experimental bearing seat at the position where it contacts the outer ring of the experimental bearing. A double nozzle is also provided on the experimental bearing seat, located between two experimental bearings. The annular groove and the double nozzles are each connected to an internal hexagonal hole through different internal oil passages. A circular hole is provided in the middle of the nozzle baffle. A waist-shaped hole is also provided on the nozzle baffle at the position corresponding to the rolling element of the experimental bearing. The end of the drive shaft away from the motor is hollow and has two annular grooves. Through holes are evenly arranged radially in the middle of the annular grooves. The outer ring of the experimental bearing has an outer ring hole, and the inner ring has an inner ring hole.

[0008] The lubricating oil collection module is used to collect the weight data of the lubricating oil flowing out of the two bearing cavities within a certain period of time; the rotating platform is used to realize the attitude change of the experimental bearing.

[0009] In one specific embodiment, the motor drive module includes a motor, a coupling, and a torque sensor;

[0010] The motor and the torque sensor are connected via a coupling. The torque sensor is used to monitor the bearing speed and torque. The torque sensor is also connected to the experimental chamber module via a coupling.

[0011] In one specific embodiment, the motor drive module further includes a bearing housing and a support; the motor, torque sensor, and bearing housing are all mounted on the support, which is mounted on a rotating platform.

[0012] In one specific embodiment, the experimental chamber module further includes an oil return bend and a transparent hose;

[0013] The lower end of the oil return port is connected to an oil return bend, and the lower end of the oil return bend is connected to a transparent hose; the transparent hose is used to guide the lubricating oil flowing out of the bearing cavity to the lubricating oil collection module.

[0014] In one specific embodiment, the experimental box module further includes an internal hexagonal thread and an adapter;

[0015] The internal hexagonal hole is used to install an internal hexagonal threaded rod to obtain a secure thread. The adapter is then installed into the internal hexagonal threaded rod and is used to connect the oil inlet pipe.

[0016] In one specific embodiment, the experimental box module further includes a bearing end cap, a bearing retaining ring, and a bracket;

[0017] The bearing end cap and bearing retaining ring are used to fix the experimental bearing axially and prevent axial movement; the bracket is set below the main body of the experimental chamber and is used to fix the main body of the experimental chamber.

[0018] In one specific embodiment, the two outlets of the dual nozzles are respectively directed toward the rolling elements of the two experimental bearings.

[0019] In one specific embodiment, the nozzle adjustment module further includes a stainless steel tube and a lifting platform; the nozzle is disposed at one end of the stainless steel tube, the stainless steel tube is movably disposed on the lifting platform, and the other end of the stainless steel tube is connected to the oil inlet pipe.

[0020] In one specific embodiment, the lubricating oil collection module includes a beaker, an electronic scale, and an oil collection tank; a filter screen is arranged on the oil collection tank, the electronic scale is placed on the filter screen, and the beaker is placed on the electronic scale. After the nozzle finishes spraying oil, the lubricating oil in the two bearing cavities will flow into the beaker through the transparent hose, and the weight of the lubricating oil will be read by the electronic scale.

[0021] In one specific embodiment, the rotating platform includes a top plate, a base, a connecting rod, and a screw; the motor drive module, the experimental chamber module, and the nozzle adjustment module are all mounted and fixed on the top plate; connecting rods are provided at both ends of the top plate, the bottom of the connecting rods are set on the base, and a screw is provided on one end of the connecting rod. The screw is used to adjust the height of the connecting rod. By rotating the screw, the tilt angle of the top plate is changed, thereby realizing the change of the posture of the experimental bearing.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention can be used to measure the oil return rate of different types of dual bearing combinations, such as deep groove ball bearings and cylindrical roller bearings, under different lubrication methods. It can analyze the variation law of bearing cavity oil return rate under different postures, observe the internal lubricating oil flow state of dual bearings under different lubrication methods, analyze the variation law of dual bearing rotation torque under different lubrication methods, and complete multi-parameter and multi-condition tests with a single device. This reduces the time and economic cost of repeatedly changing experimental equipment or building multiple systems in traditional methods, and provides guidance for the structural design of aviation lubrication systems.

[0024] This invention enables the following four dual-bearing lubrication methods:

[0025] ① Jet lubrication. The nozzle will be aimed at the gap between the cage and the inner ring or the gap between the cage and the outer ring of the test bearing, and the lubricating oil will pass through both test bearings at the same time.

[0026] ②Under-ring lubrication. The nozzle is aimed at the hollow part of the drive shaft and sprays the lubricating oil. After rotating inside the shaft, the lubricating oil passes through the hole on the drive shaft to the annular groove of the drive shaft. The lubricating oil in the annular groove of the drive shaft then passes through the inner ring hole on the test bearing to the rolling element.

[0027] ③Outer ring lubrication. Lubricating oil enters the internal oil passage of the outer ring lubrication of the experimental chamber body through the oil inlet pipe and adapter. After passing through the passage, it reaches the annular groove of the bearing housing. The lubricating oil in the annular groove of the bearing housing then reaches the rolling element through the outer ring hole on the experimental bearing.

[0028] ④ Inter-bearing jet lubrication. Lubricating oil enters the internal oil passage for jet lubrication between the bearings of the main body of the experimental chamber through the oil inlet pipe and adapter. At the end of the passage are two nozzles, which are arranged on the left and right and sprayed onto the rolling elements of the two experimental bearings respectively.

[0029] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The present invention will now be described in further detail. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of a motor drive module according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of an experimental box module according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the main body of the experimental box according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the internal hexagonal hole on the top of the experimental box body according to an embodiment of the present invention, as well as the corresponding internal hexagonal thread and adapter.

[0036] Figure 6 This is a schematic diagram of the internal oil passage of the experimental chamber body according to an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of a nozzle baffle according to an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of a drive shaft according to an embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of an experimental bearing according to an embodiment of the present invention;

[0040] Figure 10 This is a schematic cross-sectional view of an experimental bearing after installation according to an embodiment of the present invention;

[0041] Figure 11 This is a schematic diagram of a nozzle adjustment module according to an embodiment of the present invention;

[0042] Figure 12 This is a schematic diagram of a lubricating oil collection module according to an embodiment of the present invention;

[0043] Figure 13 This is a schematic diagram of a rotating platform according to an embodiment of the present invention;

[0044] The components include: 1. Motor drive module; 2. Experimental chamber module; 3. Nozzle adjustment module; 4. Lubricating oil collection module; 5. Rotary platform; 11. Motor; 12. Coupling; 13. Torque sensor; 14. Bearing housing; 15. Support; 20. Experimental bearing; 21. Experimental chamber body; 22. Drive shaft; 23. Drive bearing; 24. Nozzle baffle; 25. Transparent hose; 26. Adapter; 27. Bearing end cover; 28. Bearing retaining ring; 29. ​​Bracket; 23a. Drive bearing installation position; 24a. Nozzle baffle installation position; 201. Outer ring hole; 202. Inner ring hole; 20a. Deep groove ball bearing. ; 20b, Cylindrical roller bearing; 211, Transparent plate; 212, Bearing cavity; 213, Oil return port; 214, Hexagonal socket hole; 215, Annular groove of bearing housing; 216, Double nozzle; 217, Oil return bend; 215a, Internal oil passage for outer ring lubrication; 216a, Internal oil passage for inter-bearing jet lubrication; 221, Annular groove of drive shaft; 241, Round hole; 242, Oval hole; 261, Hexagonal socket thread; 31, Nozzle; 32, Stainless steel pipe; 33, Lifting platform; 41, Beaker; 42, Electronic scale; 43, Oil collection tank; 51, Top plate; 52, Base; 53, Connecting rod; 54, Screw. Detailed Implementation

[0045] The embodiments of the present invention will be described in detail below. The specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0046] Example 1

[0047] In this embodiment, the dual bearings used for the analysis experiment are a combination of a deep groove ball bearing 20a and a cylindrical roller bearing 20b.

[0048] An experimental device for analyzing the oil return rate of dual bearings in aviation includes a motor drive module 1, an experimental chamber module 2, a nozzle adjustment module 3, a lubricating oil collection module 4, and a rotating platform 5; the motor drive module 1, the experimental chamber module 2, and the nozzle adjustment module 3 are all mounted on the rotating platform 5; the lubricating oil collection module is mounted on the side of the rotating platform.

[0049] The motor drive module 1 is used to provide power for the rotation of the experimental bearing; the nozzle adjustment module 3 includes a nozzle 31, and the nozzle adjustment module 3 adjusts the position of the nozzle to make the nozzle align with the injection point under different lubrication methods.

[0050] The experimental chamber module 2 includes an experimental chamber body 21, an experimental bearing 20, a drive shaft 22, a drive bearing 23, and a nozzle baffle 24; a drive bearing mounting position 23a is provided on one side wall of the experimental chamber body 21, and a drive bearing 23 is installed on the drive bearing mounting position 23a; a nozzle baffle mounting position 24a is provided on the other side wall, and a nozzle baffle 24 is installed on the nozzle baffle mounting position 24a.

[0051] The experimental bearing seat for installing the experimental bearing 20 is provided in the middle of the main body 21 of the experimental chamber. The front panel, rear panel and top panel of the main body 21 of the experimental chamber are all enclosed by transparent panels 211, preferably acrylic panels. The experimental bearing seat inside the main body of the experimental chamber has bearing cavities 212 on both sides, and an oil return port 213 is provided at the bottom of the bearing cavity.

[0052] The top of the experimental bearing housing has two internal hexagonal holes 214 for connecting the oil inlet pipe;

[0053] The experimental bearing housing has annular grooves 215 at the positions where they contact the outer rings of the two experimental bearings; the experimental bearing housing also has dual nozzles 216 located between the two experimental bearings; the annular grooves 215 and the dual nozzles 216 are each connected to an internal hexagonal hole 214 through different internal oil passages; the annular grooves are used to lubricate the outer rings of the two bearings; the dual nozzles are used to perform jet lubrication between the bearings;

[0054] The nozzle baffle is used to prevent lubricating oil from splashing out of the test chamber; a round hole 241 is provided in the middle of the nozzle baffle 24, which is used to facilitate the nozzle to complete the lubrication of the double bearing ring; a waist-shaped hole 242 is also provided on the nozzle baffle at the position corresponding to the rolling element of the test bearing, which is used to facilitate the nozzle to complete the spray lubrication of the double bearing.

[0055] The drive shaft 22 is hollow at the end away from the motor and has two annular grooves 221. The annular grooves 221 have through holes evenly arranged radially in the middle. The two annular grooves 221 correspond to two experimental bearings 20 respectively. The annular grooves are used to complete the lubrication of the double bearing ring.

[0056] The outer ring of the experimental bearing 20 is provided with an outer ring hole 201, and the inner ring is provided with an inner ring hole 202. The outer ring and inner ring of the experimental bearing are drilled separately. The outer ring hole is used for outer ring lubrication, and the inner ring hole is used for under-ring lubrication.

[0057] The lubricating oil collection module 4 is used to collect the weight data of the lubricating oil flowing out of the two bearing cavities within a certain period of time; the rotating platform 5 is used to realize the attitude change of the experimental bearing.

[0058] The motor drive module 1 includes a motor 11, a coupling 12, and a torque sensor 13;

[0059] The motor 11 is connected to the torque sensor 13 via a coupling 12. The torque sensor 13 is used to monitor the bearing speed and torque. The torque sensor 13 is connected to the experimental box module 2 via a coupling 12.

[0060] The motor drive module also includes a bearing housing 14 and a support 15; the motor 11, torque sensor 13, and bearing housing 14 are all mounted on the support 15, which is mounted on the rotating platform 5. The bearing housing 14 uses bearings to help stabilize the transmission shaft 22.

[0061] The experimental chamber module also includes an oil return bend 217 and a transparent hose 25;

[0062] The lower end of the oil return port 213 is connected to an oil return bend 217, and the lower end of the oil return bend 217 is connected to a transparent hose 25; the transparent hose 25 is used to guide the lubricating oil flowing out of the bearing cavity to the lubricating oil collection module 4.

[0063] The experimental box module also includes an internal hexagonal thread 261 and an adapter 26;

[0064] The internal hexagonal hole is used to install an internal hexagonal threaded rod to obtain a secure thread. The adapter is then installed into the internal hexagonal threaded rod and is used to connect the oil inlet pipe.

[0065] The experimental chamber module also includes a bearing end cover 27, a bearing retaining ring 28, and a bracket 29; the bearing end cover 27 and the bearing retaining ring 28 are used to fix the experimental bearing axially and prevent axial movement. The bearing end cover blocks the outer ring of the experimental bearing, and the bearing retaining ring blocks the inner ring of the experimental bearing; the bracket 29 is located below the main body of the experimental chamber and is used to fix the main body of the experimental chamber.

[0066] The two outlets of the dual nozzle 216 are respectively directed toward the rolling elements of the two experimental bearings 20.

[0067] The nozzle adjustment module 3 also includes a stainless steel pipe 32 and a lifting platform 33; the nozzle 31 is disposed at one end of the stainless steel pipe 32, the stainless steel pipe 32 is movably disposed on the lifting platform 33, and the other end of the stainless steel pipe 32 is connected to the oil inlet pipe. Installing the nozzle 31 on the stainless steel pipe 32 fixed on the lifting platform 33 facilitates the adjustment of the nozzle 31 position and facilitates the switching between jet lubrication and under-ring lubrication.

[0068] The lubricating oil collection module 4 includes two beakers 41, two electronic scales 42, and an oil collection tank 43. A filter screen is arranged on the oil collection tank 43, the electronic scales 42 are placed on the filter screen, and the beakers 41 are placed on the electronic scales 42. After the nozzle finishes spraying oil, the lubricating oil from the two bearing cavities flows through transparent hoses into the two beakers respectively, and the weight of the lubricating oil is read by the two electronic scales. The oil collection tank is used to collect the lubricating oil after the weight measurement is completed. After emptying the beakers, the next measurement can be performed. Placing the electronic scales on the filter screen allows for direct reading of the lubricating oil weight data, eliminating the step of picking up the beakers after collecting the bearing cavity lubricating oil and placing them on the electronic scales.

[0069] The rotating platform 5 includes a top plate 51, a base 52, connecting rods 53, and screws 54; the motor drive module 1, the experimental chamber module 2, and the nozzle adjustment module 3 are all mounted and fixed on the top plate 51; connecting rods 53 are provided at both ends of the top plate 51, the bottom of the connecting rods 53 is set on the base 52, and a screw 54 is provided on one end of the connecting rod 53, such as... Figure 13 As shown, screw 54 is used to adjust the height of the connecting rod. By rotating screw 54, the tilt angle of the top plate can be changed, thereby realizing the change of the experimental bearing posture.

[0070] The test procedure for dual bearings using under-ring lubrication is as follows:

[0071] S1. Adjust the rotating platform to the target angle;

[0072] S2. Align the nozzle with the center of the drive shaft, turn on the power to the hydraulic pump station, and adjust the output flow to the target flow.

[0073] S3. Connect the power supply to the motor and torque sensor, and adjust the motor to the target speed through the frequency converter;

[0074] S4. Turn on the power to the solenoid valve, and the nozzle will start spraying oil. After 10 seconds, turn off the power and the nozzle will stop spraying oil.

[0075] S5. After the transparent hose stops flowing out of lubricating oil, read the value of the electronic scale. The mass of lubricating oil flowing out of the left bearing cavity is M1, and the mass of lubricating oil flowing out of the right bearing cavity is M2. The oil return rate of the left bearing cavity is defined as η1=M1 / (M1+M2), and the oil return rate of the right bearing cavity is η2=1-η1.

[0076] S6. Repeat the measurement three times, and take the average value of the three measurements for the oil return rate;

[0077] S7. Set different operating conditions and conduct repeated experiments;

[0078] S8. After the experiment is completed, adjust the motor speed to 0, and disconnect the power supply to the motor, torque sensor, hydraulic pump station, and main power supply.

[0079] The test procedure for dual bearings using jet lubrication is as follows:

[0080] S1. Adjust the rotating platform to the target angle;

[0081] S2. Align the nozzle with the bearing rolling elements through the oblong hole of the nozzle baffle, turn on the power of the hydraulic pump station, adjust the output flow to a small flow first and turn on the power of the solenoid valve to facilitate the nozzle alignment with the injection point. The injection point includes the gap between the test bearing cage and the inner ring and the cage and the outer ring. After alignment, turn off the power of the solenoid valve.

[0082] S3. Connect the power supply to the motor and torque sensor, and adjust the motor to the target speed through the frequency converter;

[0083] S4. Adjust the output flow rate to the target flow rate, turn on the power supply of the solenoid valve, and the nozzle will start spraying oil. After 10 seconds, turn off the power supply and the nozzle will stop spraying oil.

[0084] S5. After the transparent hose stops flowing out of lubricating oil, read the value of the electronic scale. The mass of lubricating oil flowing out of the left bearing cavity is M1, and the mass of lubricating oil flowing out of the right bearing cavity is M2. The oil return rate of the left bearing cavity is defined as η1=M1 / (M1+M2), and the oil return rate of the right bearing cavity is η2=1-η1.

[0085] S6. Repeat the measurement three times, and take the average value of the three measurements for the oil return rate;

[0086] S7. Set different operating conditions and conduct repeated experiments;

[0087] S8. After the experiment is completed, adjust the motor speed to 0, and disconnect the power supply to the motor, torque sensor, hydraulic pump station, and main power supply.

[0088] The test procedure for dual bearings using outer ring lubrication is as follows:

[0089] S1. Connect the oil inlet pipe to the adapter corresponding to the outer ring lubrication of the test chamber;

[0090] S2. Adjust the rotating platform to the target angle;

[0091] S3. Connect the power supply to the hydraulic pump station and adjust the output flow to the target flow.

[0092] S4. Turn on the power to the motor and torque sensor, and adjust the motor to the target speed through the frequency converter;

[0093] S5. Turn on the power to the solenoid valve and the nozzle will start spraying oil. After 10 seconds, turn off the power and the nozzle will stop spraying oil.

[0094] S6. After the transparent hose stops flowing out of lubricating oil, read the value of the electronic scale. The mass of lubricating oil flowing out of the left bearing cavity is M1, and the mass of lubricating oil flowing out of the right bearing cavity is M2. The oil return rate of the left bearing cavity is defined as η1=M1 / (M1+M2), and the oil return rate of the right bearing cavity is η2=1-η1.

[0095] S7. Repeat the measurement three times, and take the average of the three measurements for the oil return rate;

[0096] S8. Set different operating conditions and conduct repeated experiments;

[0097] S9. After the experiment is completed, adjust the motor speed to 0, and disconnect the power supply to the motor, torque sensor, hydraulic pump station, and main power supply.

[0098] The test procedure for using inter-bearing jet lubrication in dual bearings is as follows:

[0099] S1. Connect the oil inlet pipe to the adapter for jet lubrication between the corresponding bearings in the test chamber;

[0100] S2. Adjust the rotating platform to the target angle;

[0101] S3. Connect the power supply to the hydraulic pump station and adjust the output flow to the target flow.

[0102] S4. Turn on the power to the motor and torque sensor, and adjust the motor to the target speed through the frequency converter;

[0103] S5. Turn on the power to the solenoid valve and the nozzle will start spraying oil. After 10 seconds, turn off the power and the nozzle will stop spraying oil.

[0104] S6. After the transparent hose stops flowing out of lubricating oil, read the value of the electronic scale. The mass of lubricating oil flowing out of the left bearing cavity is M1, and the mass of lubricating oil flowing out of the right bearing cavity is M2. The oil return rate of the left bearing cavity is defined as η1=M1 / (M1+M2), and the oil return rate of the right bearing cavity is η2=1-η1.

[0105] S7. Repeat the measurement three times, and take the average value of the three measurements for the oil return rate;

[0106] S8. Set different operating conditions and conduct repeated experiments;

[0107] S9. After the experiment is completed, adjust the motor speed to 0, and disconnect the power supply to the motor, torque sensor, hydraulic pump station, and main power supply.

[0108] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions and substitutions can be made without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An experimental device for analyzing oil return rate of an aviation dual bearing, characterized in that, It includes a motor drive module (1), an experimental chamber module (2), a nozzle adjustment module (3), a lubricating oil collection module (4), and a rotating platform (5); the motor drive module (1), the experimental chamber module (2), and the nozzle adjustment module (3) are all mounted on the rotating platform (5); The motor drive module (1) is used to provide power for the rotation of the experimental bearing; the nozzle adjustment module (3) includes a nozzle (31), and the nozzle adjustment module (3) adjusts the position of the nozzle to make the nozzle align with the injection point under different lubrication methods. The experimental chamber module (2) includes an experimental chamber body (21), an experimental bearing (20), a drive shaft (22), a drive bearing (23), and a nozzle baffle (24); the drive bearing (23) is installed on one side of the experimental chamber body (21), and the nozzle baffle (24) is installed on the other side; an experimental bearing seat for installing the experimental bearing (20) is provided in the middle of the experimental chamber body (21), and the front panel, rear panel, and top panel of the experimental chamber body (21) are all enclosed by transparent panels (211); the two sides of the experimental bearing seat inside the experimental chamber body are bearing cavities (212), and the bottom of the bearing cavity is provided with an oil return port (213); two internal hexagonal holes (214) are reserved on the top of the experimental bearing seat; the experimental bearing seat has a contact with the outer ring of the experimental bearing. The bearing housing has an annular groove (215) at the position; the experimental bearing housing also has a double nozzle (216) located between the two experimental bearings; the bearing housing annular groove (215) and the double nozzle (216) are connected to an internal hexagonal hole (214) through different internal oil passages; a round hole (241) is provided in the middle of the nozzle baffle (24); a waist-shaped hole (242) is also provided at the position of the rolling element of the experimental bearing corresponding to the nozzle baffle; the drive shaft (22) is hollow at the end away from the motor and has two drive shaft annular grooves (221), and through holes are evenly arranged radially in the middle of the drive shaft annular grooves (221); the outer ring of the experimental bearing (20) has an outer ring hole (201), and the inner ring has an inner ring hole (202). The bearing housing annular groove (215) and the outer ring hole (201) are used to complete the lubrication of the outer ring of the double bearing; the double nozzle (216) is used to complete the inter-bearing spray lubrication; the waist-shaped hole (242) is used to facilitate the nozzle to complete the spray lubrication of the double bearing; the two drive shaft annular grooves (221) correspond to the two experimental bearings (20) respectively, and the round hole (241), the drive shaft annular groove (221) and the inner ring hole (202) are used to complete the lubrication of the lower ring of the double bearing; The lubricating oil collection module (4) is used to collect the weight data of the lubricating oil flowing out of the two bearing cavities within a certain period of time; the rotating platform (5) is used to realize the attitude change of the experimental bearing.

2. The experimental apparatus for analyzing the oil return rate of dual bearings in aerospace according to claim 1, characterized in that, The motor drive module (1) includes a motor (11), a coupling (12), and a torque sensor (13). The motor (11) is connected to the torque sensor (13) via a coupling (12). The torque sensor (13) is used to monitor the bearing speed and torque. The torque sensor (13) is connected to the experimental box module (2) via a coupling (12).

3. The aero dual bearing oil feed rate analysis test apparatus according to claim 2, wherein, The motor drive module also includes a bearing housing (14) and a support (15); the motor (11), torque sensor (13), and bearing housing (14) are all mounted on the support (15), and the support (15) is mounted on the rotating platform (5).

4. The aero dual bearing oil feed rate analysis test apparatus according to claim 1, wherein, The experimental chamber module also includes an oil return bend (217) and a transparent hose (25). The lower end of the oil return port (213) is connected to an oil return bend (217), and the lower end of the oil return bend (217) is connected to a transparent hose (25); the transparent hose (25) is used to guide the lubricating oil flowing out of the bearing cavity to the lubricating oil collection module (4).

5. The aero dual bearing oil feed rate analysis test apparatus of claim 1, wherein, The experimental box module also includes an internal hexagonal thread (261) and an adapter (26). The internal hexagonal hole is used to install an internal hexagonal threaded rod to obtain a secure thread. The adapter is then installed into the internal hexagonal threaded rod and is used to connect the oil inlet pipe.

6. The aero dual bearing oil feed rate analysis test apparatus of claim 1, wherein, The experimental box module also includes a bearing end cap (27), a bearing retaining ring (28), and a bracket (29). The bearing end cap (27) and bearing retaining ring (28) are used to fix the experimental bearing axially and prevent axial movement; the bracket (29) is set below the main body of the experimental box and is used to fix the main body of the experimental box.

7. The aero dual bearing oil feed rate analysis test apparatus according to claim 1, wherein, The two outlets of the dual nozzle (216) are respectively directed toward the rolling elements of the two experimental bearings (20).

8. The aero dual bearing oil feed rate analysis test apparatus of claim 1, wherein, The nozzle adjustment module (3) also includes a stainless steel pipe (32) and a lifting platform (33); the nozzle (31) is set at one end of the stainless steel pipe (32), the stainless steel pipe (32) is movably set on the lifting platform (33), and the other end of the stainless steel pipe (32) is connected to the oil inlet pipe.

9. The experimental apparatus for analyzing the oil return rate of dual bearings in aerospace according to claim 1, characterized in that, The lubricating oil collection module (4) includes a beaker (41), an electronic scale (42), and an oil collection tank (43). A filter screen is arranged on the oil collection tank (43), the electronic scale (42) is placed on the filter screen, and the beaker (41) is placed on the electronic scale (42). After the nozzle finishes spraying oil, the lubricating oil in the two bearing cavities will flow into the beaker through the transparent hose, and the weight of the lubricating oil will be read by the electronic scale.

10. The aero dual bearing oil feed rate analysis test apparatus of claim 1, wherein, The rotating platform (5) includes a top plate (51), a base (52), a connecting rod (53), and a screw (54); the motor drive module (1), the experimental box module (2), and the nozzle adjustment module (3) are all installed and fixed on the top plate (51); a connecting rod (53) is provided at both ends of the top plate (51), the bottom of the connecting rod (53) is set on the base (52), and a screw (54) is provided on one end of the connecting rod (53). The screw (54) is used to adjust the height of the connecting rod. The tilt angle of the top plate is changed by rotating the screw (54), thereby realizing the change of the posture of the experimental bearing.

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