Friction and wear test bench for thrust vectoring nozzle adjusting mechanism and test method thereof

Abstract

The application provides a thrust vector nozzle adjusting mechanism friction and wear test bench and a test method thereof, which comprises a roller mechanism, a wear mechanism, a first driving device and a second driving device arranged on the workbench, the second driving device is used for driving the roller mechanism to move back and forth so that the roller mechanism and the wear mechanism are in friction with each other, a groove and a threaded hole are arranged in the framework, a ceramic heating sheet is arranged in the groove and is used for heating the framework, and a temperature sensor is arranged in the threaded hole and is used for measuring the temperature of the framework. The application has a simple structure and is easy to implement. By comparing the friction and wear values of the roller-framework before and after heating, the influence of temperature on the friction and wear of the roller-framework of the thrust vector nozzle adjusting mechanism can be obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engine test, in particular to a thrust vector nozzle adjusting mechanism friction and wear test bench and a test method thereof. BACKGROUND

[0002] In the field of aero-engine, the thrust vector nozzle adjusting mechanism is widely used in aero-engine because it can realize 360° vector deflection, improve the maneuverability of the jet, and reduce the take-off speed and take-off sliding distance of the jet.

[0003] In the thrust vector nozzle adjusting mechanism, the wear phenomenon between the roller and the skeleton is most obvious under the combined action of aerodynamic load and thermal load. At the same time, the wear phenomenon between the roller and the skeleton is the wear phenomenon under high temperature and heavy load, and the wear mechanism is relatively complex. However, the existing friction and wear test bench is mostly used for studying the friction and wear under low temperature and light load. In order to achieve the above goal, the thrust vector nozzle adjusting mechanism friction and wear test bench and the test method thereof are designed, and the influence law of the size, assembly, material, load and other parameters of the friction and wear of the moving pair is studied to avoid the occurrence of problems such as jamming. SUMMARY

[0004] According to the above technical problems, the thrust vector nozzle adjusting mechanism friction and wear test bench and the test method thereof are provided.

[0005] The technical means adopted by the present application are as follows:

[0006] A friction and wear test bench for a thrust vector nozzle adjustment mechanism includes a worktable, a roller mechanism, a wear mechanism, a first drive device, and a second drive device mounted on the worktable. The second drive device drives the roller mechanism to move back and forth, causing it to rub against the wear mechanism. The roller mechanism includes a roller support seat, which is fixedly connected to the roller seat via a pressure sensor. A bushing is installed inside the roller, and the bushing is installed in the roller seat via a pin, with a clearance fit. The roller support seat is fixedly connected to the output end of the second drive device. The wear mechanism includes a frame, which is disposed opposite to the roller and located at the front end of the roller. The frame is fixed outside the frame shaft. The device has an internal groove and a threaded hole. A ceramic heating element is disposed in the groove to heat the frame. A temperature sensor is disposed in the threaded hole to measure the temperature of the frame. The frame shaft is connected to one end of a torque sensor via a second coupling. The other end of the torque sensor is connected to a main shaft via a first coupling. The main shaft is coaxial with the frame shaft, and its axis is perpendicular to the movement direction of the roller mechanism. The first drive device includes a rotating mechanism and a rocker arm mechanism. The output end of the rotating mechanism is connected to the input end of the rocker arm mechanism. The output end of the rocker arm mechanism is connected to the end of the main shaft away from the frame shaft. The rocker arm mechanism is used to convert the unidirectional continuous rotation of the output shaft of the rotating device into the bidirectional reciprocating rotation of the main shaft.

[0007] Furthermore, the rocker arm mechanism includes a rocker arm extending perpendicular to the axis of the main shaft. The end of the main shaft away from the skeleton shaft is supported by a main shaft support seat. The end of the rocker arm near the main shaft is sleeved on the main shaft and fixedly connected to it. The other end of the rocker arm has a groove. One end of the driven shaft of the rocker arm is located in the groove and slidably connected to it. The other end of the driven shaft is fixedly connected to the driving shaft of the rocker arm. The driven shaft and the driving shaft are not coaxial, and their axes are both perpendicular to the extension direction of the rocker arm. The end of the driving shaft away from the driven shaft is fixedly connected to the output shaft of the rotating mechanism. Baffles for the driven shaft are provided on both sides of the groove to axially limit the driven shaft.

[0008] Furthermore, the second driving device includes a drive motor, a lead screw connected to the output end of the drive motor, and a slide rail fixed to the worktable. The slide rail extends back and forth, and the bottom of the roller support seat slides in cooperation with the slide rail. The output end of the lead screw is fixedly connected to the roller support seat.

[0009] Furthermore, the rotating mechanism includes a rotary motor, a rotary motor base, and a third coupling. The rotary motor is fixedly connected to the rotary motor base, the third coupling is connected to the output end of the rotary motor, and one end of the swing arm drive shaft is fixedly connected to the third coupling.

[0010] Furthermore, a slider is connected to the bottom of the roller support, so that the second driving device can drive the roller support to slide back and forth on the slide rail, causing the roller to rub against the frame.

[0011] A method for testing the friction coefficient of the roller skeleton in a thrust vector nozzle adjustment mechanism is as follows: S1: Install a torque sensor between the first coupling and the second coupling to measure the torque and rotational speed of the skeleton shaft; install a pressure sensor on the roller support to measure the pressure between the roller and the skeleton; S2: Start the test bench and, after it has been working for a period of time, measure the friction coefficient μ between the roller and the skeleton, μ = T / RF, where T is the torque of the skeleton shaft, F is the pressure between the roller and the skeleton, and R is the radius of the skeleton; S3: Further change the materials and clearances of the roller, the skeleton, the bushing, and the pin; change the pressure between the roller and the skeleton; change the temperature of the skeleton and the rotational speed of the rotating device; start the test bench again to study the variation law of the friction coefficient under different parameters.

[0012] A method for testing the wear of the roller skeleton of the thrust vector nozzle adjustment mechanism is as follows: S1: Clean the roller, the skeleton, the bushing, and the pin, and weigh and record the mass before the test using an analytical balance; S2: Start the test bench, and after it has been working normally for a period of time, remove the roller, the skeleton, the bushing, and the pin, clean them, and weigh them again. The difference between the two weighings is the wear amount.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The present invention has a simple structure and is easy to implement. By comparing the friction and wear values ​​of the roller-skeleton before and after heating, the influence of temperature on the friction and wear of the roller skeleton of the thrust vector nozzle adjustment mechanism can be obtained.

[0015] 2. This invention can measure the effect of load on the friction and wear of the roller skeleton of the thrust vector nozzle adjustment mechanism.

[0016] 3. By replacing rollers, bushings, pins, and frames made of different materials, this invention can obtain the friction and wear conditions of different materials on the roller frame. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the friction and wear test bench for the thrust vector nozzle adjustment mechanism provided in this specific embodiment.

[0019] Figure 2 This is a schematic diagram of the structure of the first driving device provided in this specific embodiment.

[0020] Figure 3 This is a schematic diagram of the rocker arm mechanism provided in this specific embodiment. Figure 1 .

[0021] Figure 4 This is a schematic diagram of the rocker arm mechanism in this specific embodiment. Figure 2 .

[0022] Figure 5 This is a schematic diagram of the torque sensor structure in this specific embodiment.

[0023] Figure 6 This is a schematic diagram of the wear mechanism in this specific embodiment.

[0024] Figure 7 This is a schematic diagram of the structure of the second driving device in this specific embodiment.

[0025] Figure 8 This is a schematic diagram of the roller mechanism in this specific embodiment. Figure 1 .

[0026] Figure 9 This is a schematic diagram of the roller mechanism in this specific embodiment. Figure 2 .

[0027] In the diagram: 1. Second drive unit; 101. Drive motor; 102. Lead screw; 103. Slide rail; 104. Slider; 2. Roller mechanism; 21. Roller support seat; 22. Pressure sensor; 23. Roller; 24. Bushing; 25. Pin; 26. Roller seat; 3. Wear mechanism; 301. Main shaft; 302. First coupling; 303. Torque sensor; 304. Second coupling; 305. Frame support seat; 306. Frame shaft; 307. Frame shaft spacer; 308. 309. Skeleton shaft support; 310. Ceramic heating element; 311. Temperature sensor; 4. First drive device; 401. Rotary motor; 402. Rotary motor base; 403. Third coupling; 41. Rocker arm mechanism; 411. Rocker arm support; 412. Rocker arm driven shaft baffle; 413. Rocker arm; 414. Rocker arm drive shaft spacer; 415. Rocker arm drive shaft; 416. Rocker arm driven shaft; 417. Rocker arm driven shaft spacer; 418. Slide groove; 5. Worktable. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0035] like Figures 1-9As shown, the friction and wear test bench for the thrust vector nozzle adjustment mechanism includes a worktable 5, a roller mechanism 2, a wear mechanism 3, a first drive device 4, and a second drive device 1 mounted on the worktable 5. The second drive device 4 drives the roller mechanism 2 to move back and forth, causing it to rub against the wear mechanism 3. The roller mechanism 2 includes a roller support 21, which is fixedly connected to a roller seat 26 via a pressure sensor 22. A bushing 24 is installed inside the roller 23, and the bushing 24 is installed inside the roller seat 26 via a pin 25, with a clearance fit between the bushing and the roller seat 26. The roller support 21 is fixedly connected to the output end of the second drive device 4. The wear mechanism 3 includes a frame 309, which is disposed opposite to the roller 23 and located at the front end of the roller 23. The frame 309 is fixed outside the frame shaft 306, and the frame 309 contains... The device has a groove and a threaded hole. A ceramic heating element 310 is disposed in the groove to heat the frame 309. A temperature sensor 311 is disposed in the threaded hole to measure the temperature of the frame 309. The frame shaft 306 is connected to one end of a torque sensor 303 via a second coupling 304. The other end of the torque sensor 303 is connected to a main shaft 301 via a first coupling 302. The main shaft 301 is coaxial with the frame shaft 306, and its axis is perpendicular to the moving direction of the roller mechanism 2. The first driving device 4 includes a rotating mechanism 40 and a rocker arm mechanism 41. The output end of the rotating mechanism 40 is connected to the input end of the rocker arm mechanism 41. The output end of the rocker arm mechanism 41 is connected to the end of the main shaft 301 away from the frame shaft 306. The rocker arm mechanism 41 is used to convert the unidirectional continuous rotation of the output shaft of the rotating mechanism 40 into the bidirectional reciprocating rotation of the main shaft 301.

[0036] The rocker arm mechanism 41 includes a rocker arm 413 extending perpendicular to the axis of the main shaft 301. One end of the main shaft 301 away from the skeleton shaft 306 is supported by a main shaft support 312. One end of the rocker arm 413 near the main shaft 301 is sleeved around and fixedly connected to the main shaft 301. The other end of the rocker arm 413 has a groove. One end of the rocker arm driven shaft 416 is located within the groove and is slidably connected to the groove via a rocker arm driven shaft spacer. The other end of shaft 416 is fixedly connected to the swing arm drive shaft 415, and the swing arm driven shaft 416 and the swing arm drive shaft 415 are not coaxial, and their axes are both perpendicular to the extension direction of the swing arm 413. The end of the swing arm drive shaft 415 away from the swing arm driven shaft 416 is fixedly connected to the output shaft of the rotating mechanism 40. The swing arm drive shaft is connected to the swing arm support seat through the swing arm drive shaft spacer. Swing arm driven shaft baffles 412 are provided on both sides of the slide groove to axially limit the swing arm driven shaft 416.

[0037] The second driving device 1 includes a drive motor 101, a lead screw 102 connected to the output end of the drive motor 101, and a slide rail 103 fixed on the worktable 5. The slide rail 103 extends back and forth, and the bottom of the roller support 21 slides in cooperation with the slide rail 103. The output end of the lead screw 102 is fixedly connected to the roller support 21.

[0038] The rotating mechanism includes a rotary motor 401, a rotary motor base 402, and a third coupling 403. The rotary motor 401 is fixedly connected to the rotary motor base 402, the third coupling 403 is connected to the output end of the rotary motor 401, and one end of the rocker arm drive shaft 415 is fixedly connected to the third coupling 403.

[0039] A method for testing the friction coefficient of the roller skeleton in a thrust vector nozzle adjustment mechanism is as follows: S1: Install a torque sensor 303 between the first coupling 302 and the second coupling 304 to measure the torque and rotational speed of the skeleton shaft 306; install a pressure sensor 22 on the roller support 21 to measure the pressure between the roller 23 and the skeleton 309; S2: Start the test bench and, after it has been working for a period of time, measure the friction coefficient μ between the roller 23 and the skeleton 309, μ = T / RF. In the figure, T is the torque of the skeleton shaft 306, measured by the torque sensor 303; F is the pressure between the roller 23 and the skeleton 309, measured by the pressure sensor 22; and R is the radius of the skeleton 309. S3: Further change the materials and clearances of the roller 23, the skeleton 309, the bushing 24, and the pin 25; change the pressure between the roller 23 and the skeleton 309; change the temperature of the skeleton 309 and the rotation speed of the rotating mechanism 40; restart the test bench to study the variation law of the friction coefficient under different parameters.

[0040] A method for testing the wear of the roller skeleton of the thrust vector nozzle adjustment mechanism is as follows: S1: Clean the roller 23, the skeleton 309, the bushing 24, and the pin 25, and weigh and record their mass before the test using an analytical balance; S2: Start the test bench, and after it has been working normally for a period of time, remove the roller 23, the skeleton 309, the bushing 24, and the pin 25, clean them, and weigh them again. The difference between the two weighings is the wear amount.

[0041] The working principle of this application is as follows: By starting the rotary motor 401, the rotary motor 401 drives the rocker arm drive shaft 415 to rotate reciprocally, thereby driving the rocker arm driven shaft 416 to rotate reciprocally around the axis of the rocker arm drive shaft 415. The rocker arm driven shaft 416 slides in the slide groove in the rocker arm 413, thereby driving the rocker arm 413 to swing reciprocally, thereby driving the main shaft 301 to drive the skeleton shaft 306 to rotate reciprocally. Since the skeleton 309 is sleeved on the skeleton shaft 306, the skeleton 309 swings up and down around the skeleton shaft 306. At the same time, the second drive device 1 drives the roller support seat 21 to move along the slide rail 6, thereby causing the roller 23 and the skeleton 309 to rub against each other and generate wear. The ceramic heating plate 310 heats the skeleton 309, thereby measuring the change in the amount of wear between the roller 23 and the skeleton 309 due to temperature. By changing the gap or material of the pin 25, bushing 24, roller 23 and skeleton 309, the effect on the amount of wear between the roller 23 and the skeleton 309 can be measured.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A friction and wear test bench for a thrust vector nozzle adjustment mechanism, comprising a worktable, characterized in that, It also includes a roller mechanism, a wear mechanism, a first drive device, and a second drive device mounted on the worktable. The second drive device drives the roller mechanism to move back and forth, causing it to rub against the wear mechanism. The roller mechanism includes a roller support base, which is fixedly connected to a roller seat via a pressure sensor. A bushing is installed inside the roller, and the bushing is mounted in the roller seat via a pin, with a clearance fit. The roller support base is fixedly connected to the output end of the second drive device. The wear mechanism includes a frame, which is disposed opposite to the roller and located at the front end of the roller. The frame is fixed to the outside of the frame shaft, and the frame has a groove and a threaded hole. A ceramic heating element is disposed in the groove to heat the skeleton. A temperature sensor is disposed in the threaded hole to measure the temperature of the skeleton. The skeleton shaft is connected to one end of a torque sensor via a second coupling, and the other end of the torque sensor is connected to a main shaft via a first coupling. The main shaft is coaxial with the skeleton shaft, and its axis is perpendicular to the movement direction of the roller mechanism. The first driving device includes a rotating mechanism and a rocker arm mechanism. The output end of the rotating mechanism is connected to the input end of the rocker arm mechanism, and the output end of the rocker arm mechanism is connected to the end of the main shaft away from the skeleton shaft. The rocker arm mechanism is used to convert the unidirectional continuous rotation of the output shaft of the rotating mechanism into the bidirectional reciprocating rotation of the main shaft. The rocker arm mechanism includes a rocker arm extending perpendicular to the axis of the main shaft. The end of the main shaft away from the skeleton shaft is supported by a main shaft support. The end of the rocker arm near the main shaft is fitted over the main shaft and fixedly connected to it. The other end of the rocker arm has a groove. One end of the driven shaft is located within the groove and slidably connected to it. The other end of the driven shaft is fixedly connected to the driving shaft, and the driven shaft and the driving shaft are not coaxial; their axes are both perpendicular to the extension direction of the rocker arm. The end of the driving shaft away from the driven shaft is fixedly connected to the output shaft of the rotating mechanism. Driven shaft baffles are provided on both sides of the groove to axially limit the driven shaft.

2. The friction and wear test bench for the thrust vector nozzle adjustment mechanism according to claim 1, characterized in that, The second driving device includes a drive motor, a lead screw connected to the output end of the drive motor, and a slide rail fixed to the worktable. The slide rail extends back and forth, and the bottom of the roller support seat slides in cooperation with the slide rail. The output end of the lead screw is fixedly connected to the roller support seat.

3. The friction and wear test bench for the thrust vector nozzle adjustment mechanism according to claim 1, characterized in that, The rotating mechanism includes a rotary motor, a rotary motor base, and a third coupling. The rotary motor is fixed to the worktable via the rotary motor base, and the output end of the rotary motor is connected to the drive shaft of the rocker arm via the third coupling.

4. The friction and wear test bench for the thrust vector nozzle adjustment mechanism according to claim 2, characterized in that, The bottom of the roller support is connected to a slider that slides in cooperation with the slide rail.

5. A method for testing the friction coefficient of the roller skeleton in a thrust vector nozzle adjustment mechanism, characterized in that, Based on the friction and wear test bench for the thrust vector nozzle adjustment mechanism according to any one of claims 1-4, the method comprises the following steps: S1: The torque sensor is installed between the first coupling and the second coupling for measuring the torque and speed of the skeleton shaft; the pressure sensor is installed on the roller support for measuring the pressure between the roller and the skeleton. S2: Start the test bench and after it has been working for a period of time, measure the friction coefficient μ between the roller and the skeleton, μ=T / RF, where T is the torque of the skeleton shaft, F is the pressure between the roller and the skeleton, and R is the radius of the skeleton; S3: Change the material and clearance of the roller, the skeleton, the bushing, and the pin; change the pressure between the roller and the skeleton; change the temperature of the skeleton and the rotation speed of the rotating mechanism; restart the test bench to study the variation law of the friction coefficient under different parameters.

6. A method for testing the wear of the roller skeleton in a thrust vector nozzle adjustment mechanism, characterized in that, Based on the friction and wear test bench for the thrust vector nozzle adjustment mechanism according to any one of claims 1-4, the method comprises the following steps: S1: Clean the roller, the skeleton, the bushing, and the pin; weigh and record the mass before the test using an analytical balance. S2: Start the test bench. After it has been working normally for a period of time, remove the roller, the skeleton, the bushing, and the pin, clean them, and weigh them again. The difference between the two weighings is the amount of wear.

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