High-precision measuring equipment and method suitable for on-orbit rocket sled sliding shoe abrasion loss
By designing a high-precision measurement device including thin plate-shaped jaws and slide bar structures, the problem of insufficient measurement accuracy and difficulty in operation of rocket sled shoe wear is solved, and fast and accurate measurement of wear is achieved on the track, supporting Rocketsled stability assessment.
Patent Information
- Application Number
- CN202411625113.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-02-21
AI Technical Summary
The existing methods for measuring wear of rocket sled shoe have problems of insufficient accuracy and difficulty in operation, especially in confined spaces.
A high-precision measurement device including a vernier, caliper body and digital display module is designed. It adopts a thin plate-shaped claw and slide bar structure, which can directly measure the thickness of the slipper in a narrow space, and improve the measurement accuracy through digital display module and sensor. .
It realizes high-precision measurement of the wear amount of rocket sled shoe, can quickly and accurately obtain wear data on the track, and supports the stability evaluation of the rocket sled shoe track matching pair.
Smart Images
Figure CN119492306A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of rocket skid testing, and in particular to a high-precision measurement device and method for the wear of a skid shoe of an on-orbit rocket skid. Background Art
[0002] The rocket sled test is a large-scale ground dynamic test that uses a rocket engine as a power source to propel the rocket sled on which the test object is mounted to move forward at high speed on a special slide rail to simulate the speed, overload and mechanical environment required by the test object during actual flight. It is often used to assess the functions of aircraft, missiles, aerospace vehicles, or components.
[0003] The skid is the link between the rocket sled and the high-precision slide rail. It cooperates with the slide rail by holding the flange of the high-precision slide rail, and runs stably along the track without detaching under the action of the engine. In order to avoid the jamming between the skid and the track, a certain gap will be reserved between the shoe and the track system. When the rocket sled runs at high speed under the thrust of the engine, the relative speed between the shoe and the track is accelerated from static to a certain speed. As the microscopic rough contact surfaces between the skid and the track impact each other at high speed, the skid continues to wear. Under hypersonic conditions, if the temperature continues to rise and reaches the melting point of the skid material, melting wear will occur, causing the wear rate to rise rapidly. The increase in wear will cause the gap between the skid and the track to double, causing the collision force between the rocket sled shoe and the track to increase exponentially, thus affecting the stability of the rocket sled's operation.
[0004] From the analysis of test data, it can be seen that the role of the shoe-rail gap in the stable operation of the rocket sled on track is becoming increasingly prominent. If the gap is too large, it is likely to cause the rocket sled to become unstable during operation; if the gap is too small, it may cause the force between the rocket sled shoe and the rail to be too large, resulting in gouging and burning, friction heat accumulation, and the phenomenon that the wear debris is not easy to be removed, which is also not conducive to the stable operation of the rocket sled. The measured data of the wear amount of the rocket sled test provides important value for the estimation of the wear amount and can provide an important reference for the reasonable design of the shoe-rail gap. There are currently two methods for measuring the wear of rocket sled shoes: one is to use a vernier caliper to measure the thickness of the rocket sled shoes before the rocket sled vehicle is inspected for passability, and after the test, the rocket sled vehicle is dragged out of the track from the high-precision slide rail and measured again with a vernier caliper. The difference in thickness between the two is the wear of the shoes. The problem with this method is that the wear during the rocket sled passability inspection and the wear of the sled vehicle dragged to the bottom of the track after the rocket sled test are not included, and the actual wear of the shoes in the rocket sled test is smaller than the measured value; the second is to use a conical feeler gauge to measure the shoe-rail gap value before and after the on-track rocket sled test after the rocket sled vehicle is inspected for passability, and the difference between the two is the lateral vertical wear of the shoes. The problem with this method is that the wear of the five contact surfaces of the shoes cannot be obtained separately, and due to the unevenness of the track, the measurement accuracy cannot be guaranteed; due to the narrow space between the rocket sled vehicle and the track, the operator will be greatly restricted when using the conical feeler gauge for measurement and reading. Summary of the invention
[0005] The purpose of the present invention is to provide a high-precision measurement device and method for the wear of on-orbit rocket skid shoes, so as to realize the high-precision measurement of the wear of on-orbit rocket skid shoes, provide real data support for the inverse estimation of the wear of rocket skid shoes, and further provide an important reference for the rocket skid shoe rail matching and stability evaluation.
[0006] In order to achieve the above tasks, the present invention adopts the following technical solutions:
[0007] A high-precision measurement device for the wear of a skid shoe of an on-orbit rocket comprises a vernier, a caliper body and a digital display module, wherein:
[0008] The caliper body is a rectangular structure, a thin plate-shaped main body clamping claw is arranged on the front end surface of the caliper body, and the digital display module is arranged on the rear end surface of the caliper body; a scale matching groove is opened in the caliper body along the length direction, and the scale matching groove is a non-closed circular groove; dovetail grooves are opened on the caliper body on both sides of the scale matching groove along the length direction; the rear end surface or the front end surface of the main body clamping claw is the measurement reference surface;
[0009] The cursor includes a cylindrical slide rod, a movable claw is arranged on the upper front end of the slide rod, the movable claw is in a right triangle structure, the lower end of the movable claw protrudes outwards on both sides to form a slider, and a limit block matching the dovetail groove is processed on the lower surface of the slider; the front end surface of the slide rod is flush with the front end surface of the movable claw, and both are planes;
[0010] The vernier is installed in the caliper body, the sliding rod of the vernier is assembled in the matching groove of the scale, and the limit block at the lower part of the slider of the movable claw is assembled in the dovetail groove;
[0011] The digital display module is equipped with a sensor. The sliding rod of the cursor passes through the digital display module and is connected to the sensor. The sensor is used to detect the displacement of the sliding rod to achieve measurement. The digital display module is connected to the digital display screen through a plug wire. When measuring, the cursor is pushed so that the object to be measured is clamped between the movable claw and the main body claw. At this time, the measurement result of the digital display module is the thickness of the object to be measured.
[0012] Furthermore, the high-precision measuring equipment also includes a locking device; the locking device is installed on the lower part of the caliper body, and the locking device adopts a locking screw. When the locking screw is rotated so that its front end contacts the cursor, the cursor cannot continue to move, thereby achieving the purpose of locking the cursor position.
[0013] Furthermore, the thickness of the main body claw is 0.8 mm, the width is 16 mm, and the material is high-speed steel.
[0014] Furthermore, when the cursor is pushed until the movable claw contacts the main body claw, the total length of the entire measuring device is 80 mm, and when the cursor is pulled back until the movable claw contacts the digital display module, the measuring range is maximum, and the total length of the entire measuring device is 100 mm.
[0015] Furthermore, when there is a fitting clearance on both sides of the sliding shoe and the sliding rail that can insert the main body claw, the rear end face of the main body claw is used as the measuring reference plane, the cursor is pushed so that the side wall of the sliding shoe is stuck between the main body claw and the movable claw, and the measurement result is read to achieve the measurement of the sliding shoe thickness; and when the sliding shoe is offset relative to the sliding rail, so that the fitting clearance between the sliding shoe and the offset side of the sliding rail is too small to insert the main body claw, the front end face of the main body claw is pressed against the side face of the sliding rail, and the front end face is used as the measuring reference plane, and then the cursor is pushed so that the movable claw contacts the outer surface of the sliding shoe, and then the measurement result is read, and then the thickness of the sliding shoe is subtracted from the measurement result. The thickness of the main body claw is obtained.
[0016] Furthermore, the movable clamping claw and the main clamping claw are of unequal length.
[0017] A high-precision measurement method for the wear of a skid shoe of an on-orbit rocket includes:
[0018] First, the rocket sled is put through the rails and a passability inspection is carried out: the rocket sled is lifted by a crane, the slide shoe at the bottom of the rocket sled is assembled on the rails, and then the rocket sled is pulled to slide smoothly along the rails, so that there is no jamming between the slide shoe and the rails;
[0019] Secondly, use the measuring equipment to measure the thickness of the shoe; when measuring, if the main claw of the caliper body can be inserted into the matching gap between the shoe and the side of the slide rail, push the cursor so that the side wall of the shoe is stuck between the main claw and the movable claw and read the measurement result of the shoe thickness; if there is an offset between the shoe and the slide rail so that the main claw cannot be inserted into the matching gap, place the front end face of the main claw against the side of the slide rail, use the front end face as the measurement reference surface, and then push the cursor so that the movable claw contacts the outer surface of the shoe and read the measurement result, then subtract the thickness of the main claw from the measurement result to obtain the thickness of the shoe; for the measurement of each side of the shoe, multiple measurements should be made at the preset point of the measurement and the average value should be taken as the measured thickness h1 of the point;
[0020] Finally, the rocket sled engine ignites and pushes the rocket sled to run at high speed along the high-precision slide rail; under the mutual thermal-mechanical coupling of the rocket sled shoe rail, the slide shoe continues to wear; after the rocket sled stops running, the measuring equipment is used to perform multiple thickness measurements on the preset points on each side of the slide shoe and the average value h2 is taken, then the wear amount at this point h = h1-h2.
[0021] Compared with the prior art, the present invention has the following technical features:
[0022] 1. The embedded structure adopted by the caliper of the present invention is more convenient to use in narrow spaces compared with traditional calipers, and saves effective use length.
[0023] 2. The use of thin-sheet flat jaws enables direct measurement of the thickness of the on-rail sliding shoe, solving the pain point of having to use a feeler gauge for measurement when using a traditional vernier caliper.
[0024] 3. The split design of the digital display module and the caliper makes the measurement data more intuitive, avoiding the embarrassment of having to lock the traditional vernier caliper and take it out for observation when measuring in a narrow space.
[0025] 4. The design of multiple slide rails and multiple matching structures solves the problem of swinging of the traditional vernier caliper and improves the measurement accuracy.
[0026] 5. The design of two jaws of unequal length provides another option for the caliper to measure on-track shoes. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of the structure of the measuring device of the present invention.
[0028] Figure 2 It is a schematic diagram of the end surface structure of the caliper body;
[0029] Figure 3 is a structural schematic diagram of the caliper body;
[0030] Figure 4 It is a schematic diagram of the structure of the cursor;
[0031] Figure 5 is a schematic diagram of the structure of the sliding shoe;
[0032] Figure 6 It is a schematic diagram of the application of the present invention.
[0033] Explanation of the numbers in the figure: 1 cursor, 11 slide bar, 12 movable caliper, 13 slider, 14 limit block, 2 digital display module, 3 caliper body, 31 body claws, 32 scale matching groove, 33 dovetail groove, 4 locking device. DETAILED DESCRIPTION
[0034] See also Figures 1 to 6 The present invention provides a high-precision measurement device for the wear of a skid shoe of an on-orbit rocket, comprising a vernier 1, a caliper body 3, a digital display module 2 and a locking device 4, wherein:
[0035] The caliper body 3 is a rectangular structure, a thin plate-shaped main body claw 31 is arranged on the front end surface of the caliper body 3, and the digital display module 2 is arranged on the rear end surface of the caliper body 3; a scale matching groove 32 is opened in the caliper body 3 along the length direction, and the scale matching groove 32 is a non-closed circular groove; dovetail grooves 33 are opened on the caliper body 3 on both sides of the scale matching groove 32 along the length direction; the rear end surface or the front end surface of the main body claw 31 is a measurement reference surface;
[0036] The cursor 1 includes a cylindrical slide bar 11, and a movable claw 12 is provided at the upper front end of the slide bar 11. The movable claw 12 is in a right triangle structure, and its top is chamfered. The lower end of the movable claw 12 bulges outwards to both sides to form a slider 13, and the lower surface of the slider 13 is processed with a limit block 14 that cooperates with the dovetail groove 33; the front end surface of the slide bar 11 is flush with the front end surface of the movable claw 12, and both are planes;
[0037] The cursor 1 is installed in the caliper body 3, the slide bar 11 of the cursor 1 is assembled in the scale matching groove 32, and the limit block 14 at the lower part of the slider 13 of the movable claw 12 is assembled in the dovetail groove 33;
[0038] The digital display module 2 has a built-in sensor, and the slide bar 11 of the cursor 1 passes through the digital display module 2 and is connected to the sensor; the sensor is used to detect the displacement of the slide bar 11 to achieve measurement; during measurement, the cursor 1 is pushed so that the object to be measured is clamped between the movable claw 12 and the main body claw 31, and the measurement result of the digital display module 2 is the thickness of the object to be measured. In a specific embodiment of the present invention, the sensor can be a linear displacement sensor, a rotary encoder, etc.; the digital display module 2 is connected to the digital display screen through a plug wire;
[0039] The locking device 4 is installed to the lower part of the caliper body 3. The locking device 4 adopts a locking screw. When the locking screw is rotated so that its front end contacts the cursor 1, the cursor 1 cannot move further, thereby achieving the purpose of locking the position of the cursor 1, which is convenient for reading the measurement result. In addition to the locking screw, the locking device 4 can also adopt other position locking mechanisms.
[0040] In the above technical solution of the present invention:
[0041] The main body claw 31 at the front end of the caliper body 3 is set as a thin plate structure, for example, it can be a rectangular sheet; in the embodiment of the present invention, the thickness of the main body claw 31 is 0.8mm and the width is 16mm; the material is high-speed steel, which is not only high in hardness, but also has good wear resistance, pressure resistance and durability when measuring metals such as slide shoes and rails. Since the reserved gap of the rocket sled slide shoe can adapt to the thickness, the main body claw 31 can measure most slide shoes; so that the front end of the caliper body 3 can be inserted between the rocket sled slide shoe and the slide rail to achieve thickness measurement, effectively overcoming the problems existing in traditional measurement tools.
[0042] The cursor 1 is slidably assembled into the caliper body 3 to form a sliding embedded structure, which can avoid the limitation of the constant total length of the conventional caliper. In addition, the measuring device of the present invention is designed for the wear of the slide shoe of the on-orbit rocket sled. When the cursor 1 is pushed to the point where the active claw 12 contacts the main body claw 31, the total length of the entire measuring device is 80 mm, and it can be used in the limited space where the slide shoe of the on-orbit sled body and the slide rail cooperate. When the cursor 1 is pulled back to the point where the active claw 12 contacts the digital display module 2, the measuring range is at its maximum. At this time, the total length of the entire measuring device is about 100 mm; since the thickness of the slide shoe is about 20 mm, it can meet the measurement conditions of the gap between the slide shoes of the on-orbit rocket sled.
[0043] Generally, there is a matching gap between the sliding shoe and the two sides of the sliding rail that can be inserted into the main body claw 31. The rear end surface of the main body claw 31 is used as the measurement reference surface. The cursor 1 is pushed so that the side wall of the sliding shoe is stuck between the main body claw 31 and the movable claw 12 and the measurement result is read to achieve the sliding shoe thickness measurement. Figure 5As shown; when the sliding shoe is offset relative to the sliding rail, so that the fitting clearance between the sliding shoe and the offset side of the sliding rail is too small to insert the main body claw 31, the front end face of the main body claw 31 can be placed against the side face of the sliding rail (the side face of the sliding rail is the plane that fits with the sliding shoe), and the front end face is used as the measurement reference plane. Then, the cursor 1 is pushed so that the movable claw 12 contacts the outer surface of the sliding shoe, and then the measurement result is read. Then, the thickness of the main body claw 31 is subtracted from the measurement result to obtain the thickness of the sliding shoe.
[0044] Since the clearance between the slide shoe of the rail skid and the rail is relatively narrow, it is inconvenient to observe the measurement results during measurement. Therefore, the digital display module 2 and the digital display screen adopt a split design, which can reduce the overall length of the measuring equipment on the one hand, and can observe the measurement results more intuitively and conveniently on the other hand.
[0045] In this solution, when the cursor 1 is assembled into the caliper body 3, on the one hand, the slide rod 11 is used to cooperate with the scale matching groove 32, and on the other hand, a dovetail groove 33 structure is provided on the caliper body 3 to cooperate with the slider 13 on the movable claw 12, thereby further improving the sliding accuracy and stability of the cursor 1 and avoiding problems such as shaking of the cursor 1.
[0046] In the embodiment of the present invention, the length of the portion of the active jaw 12 located on the caliper body 3 is 35 mm, and the length of the portion of the main body jaw 31 located on the caliper body 3 is 25 mm, so that the active jaw 12 and the main body jaw 31 are unequal length structures; this design mainly takes into account that when the fitting gap is too small and the front end surface of the main body jaw 31 is used as the measurement reference surface, the main body jaw 31 cannot be inserted into the fitting gap and can only rest on the side of the slide rail. At this time, in order to ensure the measurement accuracy, it is necessary to push the cursor 1 so that the active jaw 12 can contact the outer surface of the slide shoe, so the length of the active jaw 12 needs to be longer.
[0047] On the basis of the above technical solution, the present invention further provides a high-precision measurement method for the wear of the skid shoe of an on-orbit rocket, comprising the following steps:
[0048] First, the rocket sled passes through the rails and undergoes a passability inspection: the rocket sled is lifted by a crane, and then the slide shoe at the bottom of the rocket sled is assembled on the rails, and then the rocket sled is pulled to slide smoothly along the rails, so that there is no jamming between the slide shoe and the rails;
[0049] Secondly, the thickness of the shoe is measured by using a measuring device; during measurement, if the main claw 31 of the caliper body 3 can be inserted into the matching gap between the shoe and the side of the slide rail, the cursor 1 is pushed so that the side wall of the shoe is stuck between the main claw 31 and the movable claw 12, and the shoe thickness measurement result is read; if there is an offset between the shoe and the slide rail so that the main claw 31 cannot be inserted into the matching gap, the front end face of the main claw 31 is pressed against the side of the slide rail, and the front end face is used as the measurement reference surface, and then the cursor 1 is pushed so that the movable claw 12 contacts the outer surface of the shoe, and then the measurement result is read, and then the thickness of the shoe is subtracted from the measurement result; during measurement, in order to avoid accidental errors and uneven wear of the shoe, for each side of the shoe, multiple measurements should be made at the preset point of the measurement, and the average value should be taken as the measured thickness h1 of the point;
[0050] Finally, the rocket sled engine ignites and pushes the rocket sled to run at high speed along the high-precision slide rail; under the mutual thermal-mechanical coupling of the rocket sled shoe rail, the slide shoe continues to wear; after the rocket sled stops running, the measuring equipment is used to perform multiple thickness measurements on the preset points on each side of the slide shoe and the average value h2 is taken, then the wear amount at this point h = h1-h2.
[0051] Example:
[0052] The XX test is a double-track rocket sled test for a certain scientific research project, that is, the rocket sled stays on the track after the test. The maximum speed of the test is 943m / s, the trajectory length is 8687m, and the material used for the slide is 30CrMnSiNi2A steel. The rocket sled is launched from north to south, and the slides are numbered in a "Z" shape from front to back along the heading direction, that is, the first slide on the left is numbered 1#, the first slide on the right is numbered 2#, the second slide on the left is numbered 3#, the second slide on the right is numbered 4#, and so on...
[0053] After the rocket sled body passes the inspection, the high-precision wear measurement device for the on-orbit rocket sled shoe of the present invention is used ( Figure 1 ), and the following data are obtained according to the measurement method of the present invention as shown in Tables 1 to 3. Through the application of the present invention, high-precision and rapid measurement of the wear of the slide shoe of the on-orbit rocket sled is achieved, providing experimental data support for the inverse estimation of the wear of the slide shoe of the rocket sled.
[0054] Table 1 The thickness measurement values of different preset points of each slide shoe on the track sled after the passability inspection of the rocket sled
[0055] Shoe No. Outside Outside upper side Inside Underneath 1# 23.37 23.8 25 23.81 23.8 2# 23.58 24.05 25 24.55 23.95 3# 23.9 23.45 25 24 23.9 4# 23.98 23.37 25.14 24.26 23.62 5# 23.95 23.95 25 23.86 23.7 6# 23.95 23.95 25.1 23.86 23.7
[0056] Table 2 Measured thickness of each sliding shoe on the track skid after the test
[0057] Shoe No. Outside Outside upper side Inside Underneath 1# 23.18 23.12 21.1 23.87 23.7 2# 23.51 23.65 21.95 24.12 23.91 3# 22.45 21.84 24.41 23.9 22.69 4# 23.16 22.89 24.31 23.95 23 5# 23.68 23.22 23.1 23.75 23.55 6# 23.17 23.25 22.43 23.85 23.55
[0058] Table 3 Shoe wear (expressed as wear thickness)
[0059]
[0060]
[0061] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A high-precision wear measurement device for on-orbit rocket sled shoes, characterized in that: It comprises a vernier (1), a caliper body (3) and a digital display module (2), wherein: The caliper body (3) is a rectangular structure, a thin plate-shaped body clamping claw (31) is arranged on the front end surface of the caliper body (3), and the digital display module (2) is arranged on the rear end surface of the caliper body (3); a scale matching groove (32) is opened in the caliper body (3) along the length direction, and the scale matching groove (32) is a non-closed circular groove; dovetail grooves (33) are opened on the caliper body (3) on both sides of the scale matching groove (32) along the length direction; the rear end surface or the front end surface of the body clamping claw (31) is a measurement reference surface; The cursor (1) comprises a cylindrical slide bar (11), a movable claw (12) is arranged at the upper front end of the slide bar (11), the movable claw (12) is in a right triangle structure, the lower end of the movable claw (12) protrudes outwards on both sides to form a slider (13), and the lower surface of the slider (13) is processed with a limit block (14) that cooperates with the dovetail groove (33); the front end surface of the slide bar (11) is flush with the front end surface of the movable claw (12), and both are planes; The cursor (1) is installed in the caliper body (3), the slide bar (11) of the cursor (1) is assembled in the scale matching groove (32), and the limit block (14) at the lower part of the slider (13) of the movable claw (12) is assembled in the dovetail groove (33); The digital display module (2) is equipped with a sensor. The slide bar (11) of the cursor (1) passes through the digital display module (2) and is connected to the sensor. The sensor is used to detect the displacement of the slide bar (11) to achieve measurement. The digital display module (2) is connected to the digital display screen via a plug wire. When measuring, the cursor (1) is pushed so that the object to be measured is clamped between the movable clamping claw (12) and the main body clamping claw (31). At this time, the measurement result of the digital display module (2) is the thickness of the object to be measured.
2. The high-precision wear measurement device for on-orbit rocket sled shoes according to claim 1 is characterized in that: The high-precision measuring device further comprises a locking device (4); the locking device (4) is mounted on the lower part of the caliper body (3); the locking device (4) adopts a locking screw; when the locking screw is rotated so that its front end contacts the cursor (1), the cursor (1) cannot move further, thereby achieving the purpose of locking the position of the cursor (1).
3. The high-precision wear measurement device for on-orbit rocket sled shoes according to claim 1 is characterized in that: The main body claw (31) has a thickness of 0.8 mm and a width of 16 mm, and is made of high-speed steel.
4. The high-precision wear measurement device for on-orbit rocket sled shoes according to claim 1 is characterized in that: When the cursor (1) is pushed until the movable claw (12) contacts the main body claw (31), the total length of the entire measuring device is 80 mm, and when the cursor (1) is pulled back until the movable claw (12) contacts the digital display module (2), the measuring range is at its maximum, and the total length of the entire measuring device is 100 mm.
5. The high-precision wear measurement device for on-orbit rocket sled shoes according to claim 1 is characterized in that: When there is a matching clearance between both sides of the sliding shoe and the sliding rail for inserting the main body claw (31), the rear end face of the main body claw (31) is used as the measurement reference surface, the cursor (1) is pushed so that the side wall of the sliding shoe is clamped between the main body claw (31) and the movable claw (12), and the measurement result is read to achieve the measurement of the sliding shoe thickness; and when the sliding shoe is offset relative to the sliding rail, so that the matching clearance between the sliding shoe and the offset side of the sliding rail is too small to insert the main body claw (31), the front end face of the main body claw (31) is pressed against the side face of the sliding rail, and the front end face is used as the measurement reference surface, and then the cursor (1) is pushed so that the movable claw (12) contacts the outer surface of the sliding shoe, and then the measurement result is read, and then the thickness of the sliding shoe is obtained by subtracting the thickness of the main body claw (31) from the measurement result.
6. The high-precision wear measurement device for on-orbit rocket sled shoes according to claim 1 is characterized in that: The movable clamping claw (12) and the main clamping claw (31) are of unequal length.
7. A high-precision measurement method for the wear of on-orbit rocket sled shoes, characterized in that: include: First, the rocket sled is put through the rails and a passability inspection is carried out: the rocket sled is lifted by a crane, the slide shoe at the bottom of the rocket sled is assembled on the rails, and then the rocket sled is pulled to slide smoothly along the rails, so that there is no jamming between the slide shoe and the rails; Secondly, the thickness of the shoe is measured using a measuring device; during measurement, if the main body claw (31) of the caliper body (3) can be inserted into the matching gap between the shoe and the side of the slide rail, the cursor (1) is pushed so that the side wall of the shoe is clamped between the main body claw (31) and the movable claw (12) and the measurement result of the shoe thickness is read; if there is an offset between the shoe and the slide rail so that the main body claw (31) cannot be inserted into the matching gap, the front end face of the main body claw (31) is pressed against the side of the slide rail, and the front end face is used as the measurement reference surface, and then the cursor (1) is pushed so that the movable claw (12) contacts the outer surface of the shoe and the measurement result is read, and then the thickness of the shoe is obtained by subtracting the thickness of the main body claw (31) from the measurement result; for the measurement of each side of the shoe, multiple measurements should be made at the preset point of the measurement and the average value should be taken as the measured thickness h1 of the point; Finally, the rocket sled engine ignites and pushes the rocket sled to run at high speed along the high-precision slide rail; under the mutual thermal-mechanical coupling of the rocket sled shoe rail, the slide shoe continues to wear; after the rocket sled stops running, the measuring equipment is used to perform multiple thickness measurements on the preset points on each side of the slide shoe and the average value h2 is taken, then the wear amount at this point h = h1-h2.
Citation Information
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