Gear bonding strength and dry running capability test bed

Abstract

The invention discloses a gear bonding strength and dry running capability test bench. The test bench comprises a base station; the driving device and the loading device are mounted at one end of the base station; the gear box is installed at the other end of the base station, a step-up gear box and a test gear box are arranged in the gear box, and the step-up gear box is in transmission connection with the test gear box; the driving device and the loading device are in transmission connection with the step-up gear box through a coupling, and a torque detection piece is mounted on the coupling; the performance monitoring assembly is arranged on the test gear box and used for monitoring the states of the test gear under different lubricating oil amounts, pressures, temperatures and rotating speeds; and the protection assembly is installed on one side of the test gearbox. Through the arrangement of the step-up gear box and the test gear box, the operation of an aero-engine speed reducer in an oil-lacking or oil-free lubrication state at a high rotating speed and high power can be simulated, and the gear bonding strength and the dry operation capability in the speed reducer are improved by utilizing a test result.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft engine reducer testing, and in particular relates to a gear bonding strength and dry running capability testing platform. Background Art

[0002] Aircraft engine reducers running at high speed and heavy load have high pressure and instantaneous temperature between the tooth surfaces. If the lubrication effect is poor, when the instantaneous temperature is too high, the two meshing tooth surfaces will be glued together, the glued tooth surfaces will be torn, and scars will be formed in the sliding direction of the tooth surfaces, seriously affecting the transmission performance and service life of the gears.

[0003] When there is a lack of oil or no oil, the contact temperature of the tooth surface increases significantly, and the reducer quickly enters a dry-running state, further aggravating the bonding, causing the gears to get stuck or break, lose the ability to transmit power, and cause major accidents. In order to allow the aircraft to return and land safely, the aviation reducer should have a certain dry-running capability, which is of great significance for protecting the lives of pilots and ensuring the safe return of the aircraft. Improving the reducer's anti-bonding and dry-running capabilities has become a symbol of advanced design technology for modern aircraft, and conducting research on dry-running design, analysis, and testing of transmission systems has become an important topic in the aviation field.

[0004] NASA in the United States carried out relevant dry-running test research as early as the last century. The working time of gears under dry-running conditions has been greatly improved. Foreign countries have strictly blocked the dry-running technology of transmission systems. At present, the relevant gear test bench equipment in China mainly conducts tests on gear meshing efficiency, transmission error, vibration, contact fatigue limit stress, bending fatigue limit stress, etc., and the research involving dry-running technology and related test equipment has been in a blank state. Summary of the invention

[0005] The object of the present invention is to provide a gear bonding strength and dry running capacity test bench to solve the technical defect that the gear testing bench in the prior art cannot perform gear bonding strength and dry running capacity tests.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A gear bonding strength and dry running capability test bench, comprising: abutment; A driving device and a loading device are mounted on one end of the base; A gearbox is installed at the other end of the base, wherein a speed increasing gearbox and a test gearbox are arranged in the gearbox, wherein the speed increasing gearbox and the test gearbox are transmission connected; the driving device and the loading device are both transmission connected to the speed increasing gearbox through a coupling, wherein a torque detection member is installed on the coupling; A performance monitoring component, arranged on the test gear box, for monitoring the state of the test gear under different lubricating oil amounts, pressures, temperatures and rotation speeds; A protection assembly, installed on one side of the test gear box; The control device is electrically connected to the driving device, the loading device, the torque detection component and the performance monitoring component.

[0007] Further, the speed increasing gearbox is installed with a first gear shaft system and a second gear shaft system, and the test gearbox is installed with a test gear set; Wherein, the first gear shaft system and the second gear shaft system are each provided with two, the two first gear shaft systems are located in the middle of the speed increasing gear box, the two second gear shaft systems are located on one side and the other side of the two first gear shaft systems, and the test gear set is installed at the ends of the two first gear shaft systems; The driving device is connected to one of the second gear shaft systems through a coupling, and the loading device is connected to the other second gear shaft system through a coupling.

[0008] Further, the test gear box comprises a test gear box body, the test gear set is installed in the test gear box body, and the ends of the two second gear shaft systems extend into the test gear box body and are connected to the test gear set.

[0009] Furthermore, the test gear set comprises a test gear and an expansion sleeve, the test gear is mounted on the outside of the expansion sleeve, and the expansion sleeve is mounted on the end of the second gear shaft system.

[0010] Furthermore, a pipe joint and a nozzle are also provided in the test gear box, and two pipe joints are provided, one end of the two pipe joints faces the test gear set, and the other end is connected to the external hydraulic oil station; One end of the spray head faces the meshing position of the test gear set, and the other end is also connected to the external hydraulic oil station.

[0011] Further, the performance monitoring assembly includes a flow sensor, a pressure sensor, a temperature sensor, an infrared temperature sensor and a rotation speed sensor, and the temperature sensor is installed at two opposite ends of the test gear box; The speed sensor is installed at two opposite ends of the test gear box; The infrared temperature sensor is installed on the top of the test gear box; The flow sensor and the pressure sensor are installed outside the test gear box.

[0012] Further, the protection assembly includes a protection cover, and a first observation glass and a second observation glass are provided on two opposite sides of the protection cover, and the other side of the first observation glass is connected to the test gear box; A guide groove is also provided in the test gear box, and the guide groove is used to discharge debris or broken teeth.

[0013] Furthermore, the length and width of the first observation glass are smaller than the length and width of the second observation glass.

[0014] Further, the coupling includes a first coupling and a second coupling, the torque detection member includes a first torque sensor and a second torque sensor, the first torque sensor is connected to the first coupling, and the second torque sensor is connected to the second coupling; One end of the first coupling is connected to the driving device, and the other end is connected to the speed-increasing gearbox; one end of the second coupling is connected to the loading device, and the other end is also connected to the speed-increasing gearbox.

[0015] Furthermore, the driving device and the loading device have the same structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The test bench can simulate the operation of the aircraft engine reducer under oil-deficient or oil-free lubrication conditions at high speed and high power by setting up a speed-increasing gearbox and a test gearbox. The test results are used to improve the gear bonding strength and dry-running capability of the reducer, solving the technical defect that the gear test bench in the prior art cannot perform gear bonding strength and dry-running capability tests. Secondly, during the test, due to the use of two-way test components, the motor of any one way can be used as a drive motor or a load motor to form an electric power closure, and the test results are highly credible. Finally, through the performance monitoring component, the state of the test gear under different lubricating oil quantities, pressures, temperatures and speeds can be monitored in real time.

[0017] 2. By setting two first gear shaft systems and two second gear shaft systems in the speed-increasing gearbox, a multi-stage speed-increasing transmission is realized, making the power transmission more stable and improving the transmission efficiency, making the entire transmission system compact, reducing space occupation, and improving the integration and operation efficiency of the equipment. The test gear set is installed at the ends of the two first gear shaft systems, which can be easily connected to the speed-increasing gearbox for various performance tests, making the entire test system highly flexible and able to adapt to the testing requirements of gears and transmission systems of different specifications and types.

[0018] 3. The test gear set is directly installed in the test gear box and is closely connected to the two second gear shafts in the speed increasing gear box, which reduces the energy loss in the transmission process and improves the efficiency of the entire transmission system. The test gear box provides a closed and stable test environment for the test gear set, which is conducive to precise test operations. The test gear set is installed in the test gear box and is supported and protected by the box, which reduces the impact of external vibration and impact on the gear set, helps to improve the stability and durability of the test gear set, and prolongs its service life, while also improving the reliability of the test results.

[0019] 4. The expansion sleeve enables the test gear to be quickly and easily installed on the end of the second gear shaft system. The expansion sleeve can firmly clamp the test gear through its special expansion mechanism, without the need for additional fasteners or complicated installation steps, thereby improving the efficiency of installation and removal. The tight connection between the expansion sleeve and the second gear shaft system reduces the gap and looseness during the transmission process, helps to improve the accuracy and stability of the transmission, and helps to ensure that the test gear set can still maintain stable transmission performance when running at high speed, thereby improving the accuracy of the test results.

[0020] 5. The setting of pipe joints and nozzles enables the external hydraulic oil station to directly provide lubricating oil or coolant to the test gear set and its meshing parts, which helps to reduce friction and heat accumulation during gear operation and improve the wear resistance and service life of the gear. At the same time, regular lubrication and cooling can also maintain the good working condition of the gear set and ensure the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A three-dimensional schematic diagram of a gear bonding strength and dry running capability test bench provided by the present invention; Figure 2 An exploded diagram of a gear box in a gear bonding strength and dry running capability test bench provided by the present invention; Figure 3 A front view of a test gear set in a gear bonding strength and dry running capability test bench provided by the present invention; Figure 4 A cross-sectional view of the installation of a test gear set in a gear bonding strength and dry running capability test bench provided by the present invention; Figure 5The working principle and power flow diagram of the gear bonding strength and dry running capability test bench provided by the present invention; Wherein: 1. base; 2. driving device; 3. first coupling; 4. first torque sensor; 5. gear box; 51. speed increasing gear box; 511. upper housing; 512. first gear shaft system; 513. second gear shaft system; 514. lower housing; 52. test gear set; 521. test gear; 522. expansion sleeve; 53. test gear box; 531. temperature sensor; 532. test gear housing; 533. guide groove; 534. infrared temperature sensor; 535. mounting hole; 536. speed sensor; 537. pipe joint; 538. nozzle; 54. first observation glass; 55. protective cover; 56. second observation glass; 6. second torque sensor; 7. second coupling; 8. loading device. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does 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 therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Aircraft engine reducers running at high speed and heavy load have high pressure and instantaneous temperature between the tooth surfaces. If the lubrication effect is poor, when the instantaneous temperature is too high, the two meshing tooth surfaces will be glued together, the glued tooth surfaces will be torn, and scars will be formed in the sliding direction of the tooth surfaces, seriously affecting the transmission performance and service life of the gears.

[0030] When there is a lack of oil or no oil, the contact temperature of the tooth surface increases significantly, and the reducer quickly enters a dry-running state, further aggravating the bonding, causing the gears to get stuck or break, lose the ability to transmit power, and cause major accidents. In order to allow the aircraft to return and land safely, the aviation reducer should have a certain dry-running capability, which is of great significance for protecting the lives of pilots and ensuring the safe return of the aircraft. Improving the reducer's anti-bonding and dry-running capabilities has become a symbol of advanced design technology for modern aircraft, and conducting research on dry-running design, analysis, and testing of transmission systems has become an important topic in the aviation field.

[0031] NASA in the United States carried out relevant dry-running test research as early as the last century. The working time of gears under dry-running conditions has been greatly improved. At present, the relevant gear test bench equipment in China mainly conducts tests on gear meshing efficiency, transmission error, vibration, contact fatigue limit stress, bending fatigue limit stress, etc., and the research involving dry-running technology and related test equipment has been in a blank state.

[0032] In order to solve the above technical defects, the inventor provides a gear bonding strength and dry running capacity test bench.

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings: like Figure 1-Figure 4As shown, an embodiment of the present invention provides a gear bonding strength and dry running ability test bench, including a base 1, which is a plate-shaped structure, and a driving device 2 and a loading device 8 are installed at one end of the top of the base 1. The driving device 2 and the loading device 8 have the same structure and are both motors; a gear box 5 is installed at the other end of the top of the base 1, corresponding to the driving device 2 and the loading device 8, and a speed-increasing gear box 51 and a test gear box 53 are provided inside the gear box 5, and the test gear box 53 is installed on one side of the speed-increasing gear box 51, and the speed-increasing gear box 51 and the test gear box 53 are transmission-connected; wherein the driving device 2 and the loading device 8 are both transmission-connected to the speed-increasing gear box 51 through a coupling, and the speed-increasing gear box 51 drives the test gear box 53 to operate; specifically, the coupling includes a first coupling 3 and a second coupling 4. The shaft 7, the torque detection part includes a first torque sensor 4 and a second torque sensor 6, the first torque sensor 4 is connected to the first coupling 3, the second torque sensor 6 is connected to the second coupling 7, one end of the first coupling 3 is connected to the driving device 2, and the other end is connected to the speed-increasing gearbox 51, one end of the second coupling 7 is connected to the loading device 8, and the other end is also connected to the speed-increasing gearbox 51; a performance monitoring component is arranged in the test gearbox 53, and is used to monitor the state of the test gear under different lubricating oil quantities, pressures, temperatures and speeds; a protection component is installed on one side of the test gearbox 53, and is used to prevent the wear chips and broken teeth in the test gearbox 53 from splashing out during the test to cause a safety accident; a control device is electrically connected to the driving device 2, the loading device 8, the torque detection part and the performance monitoring component. During the test, the speed increasing gearbox 51 and the test gearbox 53 are provided to simulate the operation of the aircraft engine reducer under oil-starved or oil-free lubrication conditions at high speed and high power, and the test results are used to improve the gear bonding strength and dry-running capability of the reducer, thereby solving the technical defect that the gear test bench in the prior art cannot perform gear bonding strength and dry-running capability tests; secondly, during the test, due to the use of two-way test components, the motor of any one way can be used as a drive motor or a load motor to form an electric power closure, and the test results are highly credible; finally, through the performance monitoring component, the state of the test gear under different lubricating oil quantities, pressures, temperatures and speeds can be monitored in real time.

[0034] like Figure 1 and Figure 2As shown, the speed increasing gearbox 51 comprises an upper case 511 and a lower case 514, a first gear shaft system 512 and a second gear shaft system 513 are installed between the upper case 511 and the lower case 514, and a test gear set 52 is installed in the test gearbox 53; wherein, two first gear shaft systems 512 and two second gear shaft systems 513 are provided, the two first gear shaft systems 512 are located in the middle of the speed increasing gearbox 51, and the two second gear shaft systems 513 are located at one end and the other end of the two first gear shaft systems 512, and the test gear set 52 is installed at the ends of the two first gear shaft systems 512; the driving device 2 is connected to one of the second gear shaft systems 513 through the first coupling 3, and the loading device 8 is connected to the other second gear shaft system 513 through the second coupling 7. During the test, by setting two first gear shaft systems 512 and two second gear shaft systems 513 in the speed increasing gear box 51, a multi-stage speed increasing transmission is realized, which makes the power transmission more stable and improves the transmission efficiency, making the entire transmission system compact, reducing the space occupied, and improving the integration and operation efficiency of the equipment. The test gear set 52 is installed at the ends of the two first gear shaft systems 512, and can be easily connected to the speed increasing gear box 51 to perform various performance tests, so that the entire test system has high flexibility and can adapt to the testing requirements of gears and transmission systems of different specifications and types.

[0035] like Figure 2 As shown, the test gearbox 53 includes a test gearbox body 532, and the test gear set 52 is installed in the test gearbox body 532. The ends of the two second gear shaft systems 513 extend into the test gearbox body 532 and are connected to the test gear set 52. The test gear set 52 is directly installed in the test gearbox body 532 and is closely connected to the two second gear shaft systems 513 in the speed increasing gearbox 51, which reduces the energy loss in the transmission process and improves the efficiency of the entire transmission system. The test gearbox 53 provides a closed and stable testing environment for the test gear set 52, which is conducive to precise test operations. The test gear set 52 is installed in the test gearbox 53 and is supported and protected by the box body, which reduces the impact of external vibration and impact on the gear set, helps to improve the stability and durability of the test gear set 52, and prolongs its service life, while also improving the reliability of the test results. Figure 2 and Figure 3As shown, the test gear set 52 includes a test gear 521 and an expansion sleeve 522. The test gear 521 is installed on the outside of the expansion sleeve 522, and the expansion sleeve 522 is installed on the end of the second gear shaft system 513. The expansion sleeve 522 enables the test gear 521 to be quickly and conveniently installed to the end of the second gear shaft system 513. The expansion sleeve 522 can firmly clamp the test gear 521 through its special expansion mechanism without the need for additional fasteners or complicated installation steps, thereby improving the efficiency of installation and disassembly. The close connection between the expansion sleeve 522 and the second gear shaft system 513 reduces the gap and looseness during the transmission process, helps to improve the accuracy and stability of the transmission, and helps to ensure that the test gear set 52 can still maintain stable transmission performance when running at high speed, thereby improving the accuracy of the test results. Figure 2 and Figure 3 As shown, a pipe joint 537 and a nozzle 538 are also provided in the test gear box 53. There are two pipe joints 537. One end of the two pipe joints 537 faces the test gear set 52, and the other end is connected to the external hydraulic oil station. One end of the nozzle 538 faces the meshing part of the test gear set 52, and the other end is also connected to the external hydraulic oil station. The provision of the pipe joint 537 and the nozzle 538 enables the external hydraulic oil station to directly provide lubricating oil or coolant to the test gear set 52 and its meshing part, which helps to reduce friction and heat accumulation during gear operation and improve the wear resistance and service life of the gear. At the same time, through regular lubrication and cooling, the gear set can be kept in good working condition to ensure the accuracy of the test results.

[0036] like Figure 3 As shown, the performance monitoring assembly includes a flow sensor, a pressure sensor, a temperature sensor 531, an infrared temperature sensor 534 and a rotation speed sensor 536. The temperature sensor 531 is installed at two opposite ends of the test gear box 53; the rotation speed sensor 536 is installed at the other two opposite ends of the test gear box 53; the infrared temperature sensor 534 is installed at the top of the test gear box 53; the flow sensor and the pressure sensor are installed on the outside of the test gear box 53. Figure 2 As shown, the protection assembly includes a protection cover 55, and a first observation glass 54 and a second observation glass 56 are provided on two opposite sides of the protection cover 55. The other side of the first observation glass 54 is connected to the test gear box 53, and the length and width of the first observation glass 54 are smaller than the length and width of the second observation glass 56; a guide groove 533 is also opened in the test gear box 53, and the guide groove 533 is used to discharge debris or broken teeth.

[0037] The first observation glass 54 is installed at the end of the test gear housing 532, and the whole is fixed to the side wall of the speed increasing gear housing 51 through the installation hole 535, which can provide the test gear set 52 with an independent and closed operating space from the speed increasing gear housing 51. Speed ​​sensors 536 are installed at the left and right ends of the test gear housing 532, and temperature sensors 531 are installed at the upper left corner and the lower right corner of the housing to measure the temperature of the gear teeth at the non-meshing part of the test gear set 52; infrared temperature sensors 534 are installed at the middle position of the top and the axial end face of the test gear housing 532 to measure the temperature of the gear teeth at the meshing part of the test gear set 52; a nozzle 538 and an oil return pipe joint 537 are installed at the bottom of the test gear housing 532, and the lubricating oil is lubricated at the meshing point through the nozzle 538, and the oil is returned through the pipe joint 537. The parameters such as the flow rate, temperature, and pressure of the lubricating oil are controlled by an external hydraulic oil station, and the oil-starved and oil-free dry running tests under specific lubrication parameters of the test gear 521 can be realized. When the test gear 521 is conducting the oil-deficient and oil-free dry running test, the tooth surface will be glued due to the high temperature. After a short time, the glued tooth surface will be torn, and even the gear teeth will break. There is a guide groove 533 on the top of the test gear box 532 to discharge the torn debris or broken teeth. The protective cover 55 and the second observation glass 56 are fixed to the side wall of the speed increase gear box 51. The working status of the two test gears 521 can be easily observed through the second observation glass 56. At the same time, the test gear box 53 is completely enclosed in the protective cover 55, which can solve the safety problem of the splash of grinding chips and broken teeth when the test gear 521 is damaged in the extreme dry running state.

[0038] like Figure 5 As shown, when conducting the gear bonding strength and dry-running capacity test, the control device is preferably a frequency conversion controller, which can control the speed and torque of the drive device 2 and the loading device 8 respectively. At the same time, the drive device 2 and the loading device 8 can feed back the actual operating parameters to the frequency conversion control cabinet to form a closed-loop control, achieve high-precision, high-dynamic speed and torque control indicators, and achieve the testing capability of multiple tests. When the test bench is running, the frequency converter controller provides electrical energy to the drive device 2, and the drive device 2 runs at a set constant speed, which is in the electric state; the loading device 8 provides a load to the gear box 5 at a set constant torque, which is in the power generation state. The generated electrical energy is directly fed back through the frequency converter controller to form an energy local closure, and the power flow is as follows Figure 5 Counterclockwise flow shown.

[0039] The test bench can change the speed of the driving device 2 and the torque of the loading device 8 through the frequency conversion controller without stopping the machine, and provide different speed and torque parameters for the test gear. At the same time, the external hydraulic oil station provides lubricating oil of different temperatures, pressures and flows to the meshing part of the test gear 521 through the nozzle 538. When it is necessary to run dry with oil shortage or oil absence, it is only necessary to reduce or cut off the lubricating oil supply immediately. When the gear is running under extreme conditions of running dry with oil shortage or oil absence, the temperature of the tooth surface at the meshing part is too high, which will cause bonding. After a short time, the bonded tooth surface will be torn, and even the gear teeth will break. The gear adopts the connection method of the expansion sleeve 522 to quickly realize the disassembly and installation of the gear.

[0040] During the gear test, the following variables can be controlled, such as the gear material, the processing technology used, heat treatment, coating, lubricant viscosity, lubricant brand, lubricant pressure and lubricant flow rate; during the test, only one variable is changed, and the other variables are fixed. After a large number of tests and analysis of the test data, the most durable gears and their materials and processes under the same lubrication conditions can be obtained; the service life of the same gear under different lubrication conditions or lubricants can also be obtained. Therefore, for the sudden oil outage of the main reducer of an aircraft, the optimal gear selection can be provided. The power, speed and lubrication status used in the dry running test are all simulated The actual state of the aircraft.

[0041] In summary, by using the test gear set 52 to simulate the operation of the aircraft engine reducer under high speed and high power with oil-deficient or oil-free lubrication, the test results can be used to evaluate the advantages and rationality of different processing parameters of the aircraft engine reducer gear. For example, based on the test results, the effects of high-strength coatings, ultra-low friction coefficient coatings, surface self-lubricating structures, ion implantation technology, heat-resistant material coating technology, and laser surface strengthening technology on the dry running ability of the gear can be verified to seek the optimal gear surface technology and structure, improve the bonding strength and dry running ability of the gears in the reducer, and ensure the safe operation of the aircraft.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A gear bonding strength and dry running capability test bench, characterized in that: include: abutment(1); A driving device (2) and a loading device (8) are mounted on one end of the base (1); A gear box (5) is mounted on the other end of the base (1), wherein a speed increasing gear box (51) and a test gear box (53) are arranged inside the gear box (5), wherein the speed increasing gear box (51) and the test gear box (53) are transmission connected; the driving device (2) and the loading device (8) are both transmission connected to the speed increasing gear box (51) via a coupling, wherein a torque detection component is mounted on the coupling; A performance monitoring component, disposed on the test gear box (53), for monitoring the state of the test gear under different lubricating oil amounts, pressures, temperatures and rotational speeds; A protection assembly installed on one side of the test gear box (53); A control device is electrically connected to the drive device (2), the loading device (8), the torque detection component and the performance monitoring component.

2. The test bench according to claim 1, characterized in that: A first gear shaft system (512) and a second gear shaft system (513) are installed in the speed increasing gear box (51), and a test gear set (52) is installed in the test gear box (53); There are two of each of the first gear shaft system (512) and the second gear shaft system (513), the two first gear shaft systems (512) are located in the middle of the speed increasing gear box (51), the two second gear shaft systems (513) are located on one side and the other side of the two first gear shaft systems (512), and the test gear set (52) is installed at the ends of the two first gear shaft systems (512); The driving device (2) is connected to one of the second gear shaft systems (513) via a coupling, and the loading device (8) is connected to the other second gear shaft system (513) via a coupling.

3. The test bench according to claim 2, characterized in that: The test gear box (53) comprises a test gear box body (532), the test gear set (52) is installed in the test gear box body (532), and the ends of the two second gear shaft systems (513) extend into the test gear box body (532) and are connected to the test gear set (52).

4. The test bench according to claim 3, characterized in that: The test gear set (52) comprises a test gear (521) and an expansion connection sleeve (522), wherein the test gear (521) is mounted on the outside of the expansion connection sleeve (522), and the expansion connection sleeve (522) is mounted on the end of the second gear shaft system (513).

5. The test bench according to claim 3, characterized in that: The test gear box (53) is further provided with a pipe joint (537) and a nozzle (538), wherein two pipe joints (537) are provided, one end of the two pipe joints (537) faces the test gear set (52), and the other end is connected to an external hydraulic oil station; One end of the spray head (538) faces the meshing position of the test gear set (52), and the other end is also connected to the external hydraulic oil station.

6. The test bench according to claim 1, characterized in that: The performance monitoring component comprises a flow sensor, a pressure sensor, a temperature sensor (531), an infrared temperature sensor (534) and a rotation speed sensor (536); the temperature sensor (531) is installed at two opposite ends of the test gear box (53); The rotation speed sensor (536) is installed at two opposite ends of the test gear box (53); The infrared temperature sensor (534) is installed on the top of the test gear box (53); The flow sensor and the pressure sensor are installed outside the test gear box (53).

7. The test bench according to claim 1, characterized in that: The protection assembly comprises a protection cover (55), a first observation glass (54) and a second observation glass (56) are provided on two opposite sides of the protection cover (55), and the other side of the first observation glass (54) is connected to the test gear box (53); A guide groove (533) is also provided in the test gear box (53), and the guide groove (533) is used to discharge debris or broken teeth.

8. The test bench according to claim 1, characterized in that: The length and width of the first observation glass (54) are smaller than the length and width of the second observation glass (56).

9. The test bench according to claim 1, characterized in that: The coupling comprises a first coupling (3) and a second coupling (7); the torque detection component comprises a first torque sensor (4) and a second torque sensor (6); the first torque sensor (4) is connected to the first coupling (3), and the second torque sensor (6) is connected to the second coupling (7); One end of the first coupling (3) is connected to the driving device (2), and the other end is connected to the speed increasing gearbox (51); one end of the second coupling (7) is connected to the loading device (8), and the other end is also connected to the speed increasing gearbox (51).

10. The test bench according to claim 1, characterized in that: The driving device (2) and the loading device (8) have the same structure.

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