Calibration test device and method for proving ring

Abstract

The invention relates to the technical field of aero-engine tests, and particularly provides a calibration test device and method for a proving ring, and the device comprises a test bench, a heating part, and a loading part. The heating part is movably arranged on the test bed, and a heating cavity is formed in the heating part; the loading part is arranged on the test bed, a loading space is arranged on the loading part, and the loading space is used for placing the assembled bearing, the dynamometer ring and the squirrel cage elastic support; the loading space is located in the heating cavity; the heating part can move in the direction far away from the loading part until the loading space is separated from the heating cavity. Before the engine test, the clamping stagnation condition among the bearing, the force measuring ring and the squirrel cage elastic support can be obtained by simulating the real installation state of the force measuring ring in the calibration process of the force measuring ring, so that the efficiency of the subsequent engine test is greatly improved, the probability that the clamping stagnation occurs again in the subsequent engine test is reduced, and the reliability of the engine test is improved. And the required time and labor cost are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of aero-engine test, and particularly relates to a calibration test device and method for a force measuring ring. Background Art

[0002] The pressure balance test is one of the tests that must be completed before the first flight of an aero-engine. By obtaining the axial force change during the rotor operation, it is ensured that the actual axial force does not exceed the maximum allowable load of the bearing.

[0003] Currently, before the existing engine test, only the force measuring ring is directly calibrated. As a result, during the engine test, it is very easy to cause jamming between the assembled bearing, force measuring ring and cage spring due to the thermal expansion of parts caused by the simulated working temperature during the test or the machining errors existing in the parts themselves. This leads to obvious deviations in the obtained test results. At the same time, if jamming occurs between the bearing, force measuring ring and cage spring, the test can only be restarted after the engine is taken off the test stand, the force measuring ring, spring and bearing are disassembled, re-machined and reassembled. This process takes a long time, thus affecting the test efficiency and increasing the cost of the test. Summary of the Invention

[0004] In view of the above problems, the present invention provides a calibration test device for a force measuring ring, including:

[0005] A test bench;

[0006] A heating part, which is movably arranged on the test bench, and a heating cavity is arranged inside the heating part;

[0007] A loading part, which is arranged on the test bench, and a loading space is arranged on the loading part, and the loading space is used for placing the assembled bearing, force measuring ring and cage spring;

[0008] The loading space is located inside the heating cavity;

[0009] The heating part can move away from the loading part until the loading space disengages from the heating cavity.

[0010] In some specific embodiments, the loading part includes:

[0011] A lower tray, which is vertically arranged on the test bench, and a lower platform is arranged at the top of the lower tray;

[0012] An upper tray, which is coaxially arranged with the lower tray, and a lower platform is arranged at the bottom of the upper tray;

[0013] The upper platform and the lower platform are arranged at intervals to form the loading space;

[0014] A loading mechanism, which is connected to the upper tray to drive the upper platform to move in the vertical direction.

[0015] In some specific embodiments thereof, the heating part includes:

[0016] A heating box body, which is movably arranged on the test bench, and an opening is arranged on one side of the heating box body;

[0017] An upper sliding groove is formed on the top wall of the heating box body, and the upper sliding groove is slidably connected to the top of the upper tray, and one end of the upper sliding groove extends to the opening side of the heating box body, and the other end extends to the middle of the top wall of the heating box body;

[0018] A lower sliding groove is formed on the bottom wall of the heating box body, and the lower sliding groove is slidably connected to the bottom of the lower tray, and the lower sliding groove is symmetrically arranged with the upper sliding groove.

[0019] In some specific embodiments thereof, when the top of the upper tray is located in the middle of the top wall of the heating box body, an upper sealing block is embedded in the upper sliding groove, one end of the upper sealing block is arranged around the outer periphery of the top of the upper tray, and the other end is aligned with the end face of the opening side of the heating box body;

[0020] When the bottom of the lower tray is located in the middle of the bottom wall of the heating box body, a lower sealing block is embedded in the lower sliding groove, one end of the lower sealing block is arranged around the outer periphery of the bottom of the lower tray, and the other end is aligned with the end face of the opening side of the heating box body.

[0021] In some specific embodiments thereof, an outer baffle is arranged on the opening side of the heating box body, one side of the outer baffle is hinged to the heating box body, and the other side of the outer baffle is clamped to the heating box body.

[0022] In some specific embodiments thereof, a slide rail is arranged on the test bench, and the bottom of the heating box body is slidably connected to the slide rail.

[0023] In some specific embodiments thereof, an observation window is arranged on the outer baffle.

[0024] In some specific embodiments thereof, the loading part further includes:

[0025] A loading rod, one end of which is provided with a first column, and the other end is provided with a second column, and the first column is used for clearance fit with the bearing;

[0026] A jack is formed on the upper platform, and the jack is in clearance fit with the second column.

[0027] In some specific embodiments thereof, the loading mechanism includes:

[0028] A guide rail, which is installed on the test bench;

[0029] A cross beam, which is slidably connected to the guide rail, and the cross beam is connected to the top end of the upper tray;

[0030] A driving member, which is connected to the cross beam to drive the cross beam to drive the upper tray to move in the vertical direction.

[0031] A calibration test method for a force measuring ring based on the same concept, using the calibration test device for a force measuring ring described in any of the above specific embodiments, includes the following steps:

[0032] Complete the assembly of the bearing, the force measuring ring and the squirrel cage elastic support and place them in the loading space, and then drive the heating part to move until the loading space is accommodated in the heating cavity;

[0033] Start the heating part, drive the temperature of the heating cavity to a preset temperature, and obtain the first strain value of the force measuring ring;

[0034] Start the loading part, load the force measuring ring in sequence according to multiple levels of preset loads, and obtain multiple second strain values of the force measuring ring corresponding to the multiple levels of preset loads respectively;

[0035] Turn off the loading part, unload the force measuring ring, and obtain the third strain value of the force measuring ring:

[0036] Based on the first strain value and the third strain value, obtain the existence of radial jamming between the bearing, the force measuring ring and the squirrel cage elastic support;

[0037] If it is judged that there is radial jamming between the bearing, the force measuring ring and the squirrel cage elastic support, delete the multiple second strain values of the force measuring ring obtained during this group of loading processes, and drive the heating part to move in the reverse direction until the loading space is separated from the heating cavity, and then repeat the above steps. Otherwise, record the multiple second strain values of the force measuring ring obtained during this group of loading processes, and then repeat the above steps until at least three groups of loading processes of the force measuring ring are recorded;

[0038] Based on the multiple second strain values of the force measuring ring obtained during at least three groups of loading processes, fit to obtain the coefficient of the force measuring ring and complete the calibration.

[0039] Compared with the prior art, the calibration test device for the force measuring ring of the present invention has at least the following advantages: The loading space of the loading part can place the assembled bearing, force measuring ring and cage spring support to simulate the real installation state of the force measuring ring. Thus, before the final engine test, the real installation state of the force measuring ring can be simulated during the calibration process of the force measuring ring, so as to avoid the situation that the jamming between the bearing, force measuring ring and cage spring support can only be found until the subsequent engine test, greatly reducing the probability of jamming occurring again during the subsequent engine test. At the same time, the loading space is located in the heating cavity of the heating part. By driving the heating cavity to heat through the heating part, the real working temperature of the force measuring ring can be simulated. And because the heating part is movably arranged, it can drive the heating part to move away from the loading part, so that the loading space is disengaged from the heating cavity, thereby realizing the exposure of the loading space. Therefore, during the calibration process of the force measuring ring, even if jamming occurs between the bearing, force measuring ring and cage spring support, only by moving the heating part, the bearing, force measuring ring and cage spring support can be quickly taken out from the exposed loading space for disassembly operation, and can be directly put into the loading space after re-assembly. Then, by moving the heating part in the reverse direction, the loading space can be re-accommodated in the heating cavity for re-calibration, and the disassembly operation and re-assembly of the bearing, force measuring ring and cage spring support can be quickly completed. Before the engine test, during the calibration process of the force measuring ring, the jamming situation between the bearing, force measuring ring and cage spring support can be obtained, thus greatly improving the efficiency of the subsequent engine test and reducing the time and labor costs required.

[0040] The calibration test method for the force measuring ring of the present invention adopts the above-mentioned calibration test device for the force measuring ring, so it has the same beneficial effects as the above-mentioned calibration test device for the force measuring ring. Therefore, it will not be elaborated here again.

[0041] Other features and advantages of the present invention will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for describing the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0043] Figure 1 Shows a schematic diagram of the calibration test device for the force measuring ring in the embodiments of the present invention;

[0044] Figure 2 An enlarged schematic view of the loading space in an embodiment of the present invention is shown;

[0045] Figure 3 A flowchart of a calibration test method for a force measuring ring in an embodiment of the present invention is shown.

[0046] In the figure, 100 is a test bench; 110 is a slide rail; 200 is a heating part; 210 is a heating box body; 220 is an upper sealing block; 230 is a lower sealing block; 300 is a loading part; 310 is an upper tray; 311 is an upper platform; 320 is a lower tray; 321 is a lower platform; 330 is a loading mechanism; 331 is a guide rail; 332 is a cross beam; 340 is a loading rod; 400 is a bearing; 500 is a force measuring ring; 600 is a squirrel cage spring support. Specific embodiments

[0047] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] Referring to Figure 1 , an embodiment of the present invention provides a calibration test device for a force measuring ring, including: a test bench 100, a heating part 200, and a loading part 300. The heating part 200 is movably arranged on the test bench 100, and a heating cavity is arranged inside the heating part 200. The loading part 300 is arranged on the test bench 100, and a loading space is arranged on the loading part 300 for placing the assembled bearing 400, force measuring ring 500, and squirrel cage spring support 600 after assembly. The loading space is located inside the heating cavity. The heating part 200 can move away from the loading part 300 until the loading space disengages from the heating cavity.

[0049] Specifically, the heating unit 200 is movably arranged on the test bench 100 so that the heating unit 200 can move on the test bench 100 to change the set position of the heating chamber on the test bench 100 through the movement of the heating unit 200. The loading unit 300 is fixedly arranged on the test bench 100 so that the loading space of the loading unit 300 can be located at a preset position on the test bench 100. When the overall calibration test device of the force measuring ring is assembled, the assembled bearing 400, force measuring ring 500 and cage spring support 600 will be placed in the loading space. At the same time, since the loading space is also located in the heating chamber of the heating unit 200, the bearing 400, force measuring ring 500 and cage spring support 600 will also be located in the heating chamber. Thus, while simulating the real working stability of the force measuring ring 500 through the heating of the heating chamber, the loading simulation of the force measuring ring 500 can be realized through the loading space. And since the assembled bearing 400, force measuring ring 500 and cage spring support 600 can be placed in the loading space, the real installation state of the force measuring ring 500 can be simulated, so as to ensure the accuracy of the finally obtained calibration result. Among them, due to the movable arrangement of the heating unit 200, the heating unit 200 can move in the direction close to the loading unit 300 or away from the loading unit 300. When jamming occurs between the bearing 400, force measuring ring 500 and cage spring support 600, only by moving the heating unit 200 can the heating unit 200 move away from the loading unit 300 until the loading space disengages from the heating chamber, thereby realizing the exposure of the loading space. Correspondingly, the bearing 400, force measuring ring 500 and cage spring support 600 placed in the loading frame will also disengage from the heating chamber and be exposed together, so as to complete the rapid removal of the bearing 400, force measuring ring 500 and cage spring support 600 and perform the disassembly operation. And when the reassembly of the bearing 400, force measuring ring 500 and cage spring support 600 is completed, only by directly placing the assembled bearing 400, force measuring ring 500 and cage spring support 600 in the loading space and then moving the heating unit 200 in the reverse direction can the heating unit 200 move in the direction close to the loading unit 300 until the loading space and the assembled bearing 400, force measuring ring 500 and cage spring support 600 placed in the loading space are re-accommodated in the heating chamber for re-calibration. Before the engine test, when calibrating the force measuring ring 500, the jamming situation between the bearing 400, force measuring ring 500 and cage spring support 600 can be obtained, thus greatly improving the efficiency of the subsequent engine test and reducing the time and labor costs required.

[0050] In some specific embodiments of the present invention, referring to Figure 1 and Figure 2, The loading part 300 includes: a lower tray 320, an upper tray 310, and a loading mechanism 330. The lower tray 320 is vertically arranged on the test bench 100, and a lower platform 321 is provided at the top of the lower tray 320. The upper tray 310 is coaxially arranged with the lower tray 320, and an upper platform 311 is provided at the bottom of the upper tray 310. The upper platform 311 and the lower platform 321 are arranged at intervals to form a loading space. The loading mechanism 330 is connected to the upper tray 310 to drive the upper platform 311 to move in the vertical direction.

[0051] Specifically, the lower tray 320 is vertically and fixedly arranged at a preset position on the test bench 100, and a horizontal structure is provided at the top of the lower tray 320, so as to form a lower platform 321 at the top of the lower tray 320. The upper tray 310 is coaxially and vertically arranged directly above the lower tray 320, and a horizontal structure is provided at the bottom of the upper tray 310, so as to form an upper platform 311 at the bottom of the upper tray 310. The upper platform 311 and the lower platform 321 are arranged vertically opposite to each other, and there is an interval between the upper platform 311 and the lower platform 321. A loading space is formed between the upper platform 311 and the lower platform 321 through this interval. After the assembly of the bearing 400, the force measuring ring 500, and the squirrel cage spring support 600 is completed, it only needs to place the assembled bearing 400, force measuring ring 500, and squirrel cage spring support 600 on the lower platform 321 to complete the placement of the bearing 400, force measuring ring 500, and squirrel cage spring support 600 in the loading space. The structure is simple and convenient for installation.

[0052] In some specific embodiments of the present invention, referring to Figure 1 , the heating part 200 includes: a heating box body 210. The heating box body 210 is movably arranged on the test bench 100, and an opening is provided on one side of the heating box body 210. An upper sliding groove is opened on the top wall of the heating box body 210, and the upper sliding groove is slidably connected to the top of the upper tray 310. One end of the upper sliding groove extends to the opening side of the heating box body 210, and the other end extends to the middle of the top wall of the heating box body 210. A lower sliding groove is opened on the bottom wall of the heating box body 210, and the lower sliding groove is slidably connected to the bottom of the lower tray 320, and the lower sliding groove is symmetrically arranged with the upper sliding groove.

[0053] Specifically, the interior of the heating box body 210 is hollow, thereby forming a heating cavity within the heating box body 210. The heating box body 210 is movably arranged on the test bench 100, such that the heating box body 210 can move on the test bench 100 to change the setting position of the heating cavity on the test bench 100 through the movement of the heating box body 210. Among them, one side of the heating box body 210 is an open structure. At the same time, an upper sliding groove is formed on the top wall of the heating box body 210. The upper sliding groove penetrates through the upper and lower parts of the top wall of the heating box body 210, and one end of the upper sliding groove extends to the middle of the top wall of the heating box body 210, while the other end of the upper sliding groove extends to the open side of the heating box body 210 and is flush with the end face of the open side of the heating box body 210. And a lower sliding groove is formed on the bottom wall of the heating box body 210. The lower sliding groove penetrates through the upper and lower parts of the bottom wall of the heating box body 210, and the lower sliding groove and the upper sliding groove are symmetrically arranged up and down, that is, one end of the lower sliding groove extends to the middle of the bottom wall of the heating box body 210, and the other end of the lower sliding groove extends to the open side of the heating box body 210 and is flush with the end face of the open side of the heating box body 210. Among them, the upper sliding groove is slidably connected to the top of the upper tray 310, and the lower sliding groove is slidably connected to the bottom of the lower tray 320. When the top of the upper tray 310 is located in the middle of the top wall of the heating box body 210 and the bottom of the lower sliding groove is located in the middle of the bottom wall of the heating box body 210, the upper platform 311, the lower platform 321, the loading space formed by the upper platform 311 and the lower platform 321, and the assembled bearing 400, force measuring ring 500, and squirrel cage spring support 600 placed in the loading space are all accommodated in the heating cavity of the heating box body 210. When the bearing 400, force measuring ring 500, and squirrel cage spring support 600 are stuck, by moving the heating box body 210, the upper sliding groove slides relative to the top of the upper tray 310, and the lower sliding groove slides relative to the bottom of the lower tray 320 until the upper tray 310 is disengaged from the upper sliding groove from the open side of the heating box body 210, and the lower sliding groove is disengaged from the lower sliding groove from the open side of the heating box body 210, then the upper platform 311, the lower platform 321, the loading space formed by the upper platform 311 and the lower platform 321, and the assembled bearing 400, force measuring ring 500, and squirrel cage spring support 600 placed in the loading space can be disengaged from the heating cavity and exposed, so as to take out the bearing 400, force measuring ring 500, and squirrel cage spring support 600 for disassembly and reassembly.After the reassembly of the bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600 is completed and they are placed on the lower platform 321, by moving the heating box body 210 in the reverse direction, the upper sliding groove slides reversely relative to the top of the upper tray 310, and the lower sliding groove slides reversely relative to the bottom of the lower tray 320, so as to drive the upper tray 310 to slide into the upper sliding groove from the opening side of the heating box body 210, and the lower sliding groove slides into the lower sliding groove from the opening side of the heating box body 210. When the top of the upper tray 310 is repositioned in the middle of the top wall of the heating box body 210 and the bottom of the lower sliding groove is repositioned in the middle of the bottom wall of the heating box body 210, the upper platform 311, the lower platform 321, the loading space formed by the upper platform 311 and the lower platform 321, and the reassembled bearing 400, force measuring ring 500 and squirrel cage elastic support 600 placed in the loading space can be re-accommodated in the heating cavity to continue the calibration. The structure is flexible and simple, and is convenient to use. Before the engine test, when calibrating the force measuring ring 500, the jamming situation between the bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600 can be obtained, thus greatly improving the efficiency of the subsequent engine test and reducing the time and labor costs required.

[0054] Further, at least two centrifugal fans are arranged on one side of the heating box body 210, and the heating cavity in the heating box body 210 is heated by the centrifugal fans.

[0055] Further, a temperature sensor is arranged in the heating box body 210 to facilitate real-time monitoring of the temperature in the heating cavity and improve the calibration accuracy.

[0056] Further, both the centrifugal fans and the temperature sensor are electrically connected to the temperature control system. The temperature of the heating cavity detected by the temperature sensor can be transmitted to the temperature control system in real time, and the temperature control system can send instructions to the centrifugal fans according to the received temperature of the heating cavity, so as to ensure that the temperature control accuracy, temperature uniformity and heating-up time to the maximum temperature in the heating cavity are all within the preset range.

[0057] In some specific embodiments of the present invention, referring to Figure 1 , when the top of the upper tray 310 is located in the middle of the top wall of the heating box body 210, an upper sealing block 220 is embedded in the upper sliding groove. One end of the upper sealing block 220 is arranged around the outer periphery of the top of the upper tray 310, and the other end is aligned with the end face of the opening side of the heating box body 210. When the bottom of the lower tray 320 is located in the middle of the bottom wall of the heating box body 210, a lower sealing block 230 is embedded in the lower sliding groove. One end of the lower sealing block 230 is arranged around the outer periphery of the bottom of the lower tray 320, and the other end is aligned with the end face of the opening side of the heating box body 210.

[0058] Specifically, an upper sealing block 220 is also embedded in the upper sliding groove. When the top of the upper tray 310 is located in the middle of the top wall of the heating box body 210, the upper sealing block 220 can be slid and embedded into the upper sliding groove from the opening side of the heating box body 210, so as to fill the remaining space in the upper sliding groove through the upper sealing block 220. Wherein, the size of one end of the upper sealing block 220 close to the top of the upper tray 310 is adapted to the outer periphery of the top of the upper tray 310. After the embedding of the upper sealing block 220 is completed, one end of the upper sealing block 220 close to the top of the upper tray 310 can just surround the outer periphery of the top of the upper tray 310 together with the upper sliding groove, and the end of the upper sealing block 220 far from the top of the upper tray 310 is aligned with the end face of the opening side of the heating box body 210. And a lower sealing block 230 is also embedded in the lower sliding groove. When the bottom of the lower tray 320 is located in the middle of the bottom wall of the heating box body 210, the lower sealing block 230 can be slid and embedded into the lower sliding groove from the opening side of the heating box body 210, so as to fill the remaining space in the lower sliding groove through the lower sealing block 230. Wherein, the size of one end of the lower sealing block 230 close to the bottom of the lower tray 320 is adapted to the outer periphery of the bottom of the lower tray 320. After the embedding of the lower sealing block 230 is completed, one end of the lower sealing block 230 close to the bottom of the lower tray 320 can just surround the outer periphery of the bottom of the lower tray 320 together with the lower sliding groove, and the end of the lower sealing block 230 far from the bottom of the lower tray 320 is aligned with the end face of the opening side of the heating box body 210. By respectively embedding the upper sealing block 220 and the lower sealing block 230 in the upper sliding groove and the lower sliding groove, the lateral relative positions among the heating box body 210, the upper tray 310 and the lower tray 320 can be restricted, so as to avoid the offset among the heating box body 210, the upper tray 310 and the lower tray 320 in turn.

[0059] In some specific embodiments of the present invention, referring to Figure 1 , an outer baffle is provided on the opening side of the heating box body 210. One side of the outer baffle is hingedly connected to the heating box body 210, and the other side of the outer baffle is snap-connected to the heating box body 210.

[0060] Specifically, the outer baffle is arranged on the opening side of the heating box body 210, and the width dimensions of the outer baffle and the opening side of the heating box body 210 are adapted. One side edge of the outer baffle is hingedly connected to one side edge of the opening side of the heating box body 210, and the other side edge of the outer baffle is snap-fitted and connected to the other side edge of the opening side of the heating box body 210. When the outer baffle is closed, the opening side of the heating box body 210 can be blocked by the outer baffle, and cooperate with the upper sealing block 220 in the upper sliding groove and the lower sealing block 230 in the lower sliding groove to seal and limit the heating cavity, so as to ensure the heating effect of the heating cavity.

[0061] It should be noted that when the bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600 are stuck, it is only necessary to open the outer baffle plate, and slide out the upper sealing block 220 and the lower sealing block 230 from the upper slide groove and the lower slide groove respectively, so that the heating box 210 can be moved relative to the upper tray 310 and the lower tray 320, thereby taking out the bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600. After the bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600 are reassembled, it is only necessary to place the assembled bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600 on the lower platform 321 and move the heating box 210 in the opposite direction, and then slide and embed the upper sealing block 220 and the lower sealing block 230 in the upper slide groove and the lower slide groove respectively, and then close the outer baffle plate, so as to complete the sealing restriction of the heating chamber again. The structure is flexible and simple, and it is easy to operate and use.

[0062] It should be further explained that since the end of the upper sealing block 220 away from the top of the upper tray 310 is aligned with the end face of the opening side of the heating box body 210, and the end of the lower sealing block 230 away from the bottom of the lower tray 320 is aligned with the end face of the opening side of the heating box body 210, it is possible to ensure the sealing effect while avoiding conflict with the outer baffle.

[0063] In some specific embodiments of the present invention, referring to Figure 1 A slide rail 110 is provided on the test bench 100 , and the bottom of the heating box 210 is slidably connected to the slide rail 110 .

[0064] Specifically, there are at least two slide rails 110, which are symmetrically arranged on the test bench 100. The heating box 210 is arranged above the two slide rails 110, and the bottom surface of the bottom wall of the heating box 210 is slidably connected to the two slide rails 110, so as to realize the movable arrangement of the heating box 210 on the test bench 100. The structure is flexible and simple, and it is easy to operate and use.

[0065] In some specific embodiments of the present invention, referring to Figure 1 The outer baffle is provided with an observation window. Specifically, the outer baffle is a window structure so that the loading conditions of the bearing 400, the force measuring ring 500 and the squirrel cage spring support 600 in the heating chamber can be observed during the test.

[0066] In some specific embodiments of the present invention, referring to Figure 2 The loading part 300 further includes a loading rod 340. A first column is disposed at one end of the loading rod 340, and a second column is disposed at the other end. The first column is used to be clearance-matched with the bearing 400. A plug hole is provided on the upper platform 311, and the plug hole is clearance-matched with the second column.

[0067] Specifically, the squirrel-cage spring support 600 is placed on the middle part of the lower platform 321, and the force-measuring ring 500 and the bearing 400 are successively assembled above the squirrel-cage spring support 600. The whole of the loading rod 340 is in a rod-shaped structure, and the loading rod 340 is arranged between the upper platform 311 and the bearing 400. A first upright column is coaxially arranged in the middle of the bottom end of the loading rod 340, and the first upright column is inserted into the bearing 400, so that the loading rod 340 is connected with the bearing 400 in a clearance fit manner. An insertion hole is provided in the middle of the upper platform 311, and a second upright column is coaxially arranged at the top end of the loading rod 340, and the second upright column is inserted into the insertion hole, so that the loading rod 340 is connected with the upper platform 311 in a clearance fit manner. While ensuring the simplicity of installation and connection, it can also prevent the bearing 400, the force-measuring ring 500, and the squirrel-cage spring support 600 from being eccentric with the upper platform 311 and the lower platform 321, avoid the offset of the bearing 400, the force-measuring ring 500, and the squirrel-cage spring support 600, and ensure the accuracy of the test results.

[0068] In some specific embodiments of the present invention, referring to Figure 1 , the loading mechanism 330 includes: a guide rail 331, a cross beam 332, and a driving member. The guide rail 331 is erected on the test bench 100. The cross beam 332 is slidably connected to the guide rail 331, and the cross beam 332 is connected to the top end of the upper tray 310. The driving member is connected to the cross beam 332 to drive the cross beam 332 to drive the upper tray 310 to move in the vertical direction.

[0069] Specifically, the guide rail 331 is erected on the test bench 100 and extends vertically away from the test bench 100. The cross beam 332 is horizontally arranged above the top end of the upper tray 310, and both ends of the cross beam 332 are slidably connected to the guide rail 331. The driving member is arranged at one end of the guide rail 331, and the driving member is connected to the cross beam 332. The cross beam 332 can be driven to lift in the vertical direction through the driving member. The cross beam 332 is fixedly connected to the top end of the upper tray 310. When the cross beam 332 lifts or lowers, it can drive the top of the upper tray 310 to slide up and down relative to the top wall of the heating box body 210, so as to drive the upper platform 311 of the upper tray 310 located in the heating cavity to lift or lower relative to the lower platform 321. When the upper platform 311 descends, that is, when the upper platform 311 moves towards the lower platform 321, it can indirectly squeeze the bearing 400, the force-measuring ring 500, and the squirrel-cage spring support 600 downward through the loading rod 340, thereby completing the loading operation. When the upper platform 311 ascends, that is, when the upper platform 311 moves away from the lower platform 321, the extrusion of the loading rod 340 on the bearing 400, the force-measuring ring 500, and the squirrel-cage spring support 600 can be gradually released, thereby completing the unloading operation.

[0070] Further, displacement sensors are provided at both ends of the cross beam 332 to ensure that the cross beam 332 moves up and down within a preset range. By restricting the lifting distance, the load magnitudes on the bearing 400, the force measuring ring 500, and the squirrel cage spring support 600 during the test can be indirectly controlled within a preset range, thereby improving the test accuracy.

[0071] Further, a force sensor is provided inside the cross beam 332. Since the action of force is mutual, the load magnitudes on the bearing 400, the force measuring ring 500, and the squirrel cage spring support 600 can be monitored in real time, thereby improving the test accuracy.

[0072] Further, a water-cooled heat insulation device is provided adjacent to the force sensor to prevent the high temperature during heating of the heating box body 210 from damaging the force sensor.

[0073] Referring to Figure 3 , the present invention also provides a calibration test method for a force measuring ring. Using the calibration test device for a force measuring ring in any of the above specific embodiments, the method includes the following steps: Assemble the bearing 400, the force measuring ring 500, and the squirrel cage spring support 600 and place them in the loading space, and then drive the heating part 200 to move until the loading space is accommodated in the heating cavity. Start the heating part 200, drive the temperature of the heating cavity to a preset temperature, and obtain the first strain value of the force measuring ring 500. Start the loading part 300, load the force measuring ring 500 in sequence according to multiple preset loads, and obtain multiple second strain values of the force measuring ring 500 corresponding to the multiple preset loads respectively. Turn off the loading part 300, unload the force measuring ring 500, and obtain the third strain value of the force measuring ring 500: Based on the first strain value and the third strain value, obtain the presence of radial jamming between the bearing 400, the force measuring ring 500, and the squirrel cage spring support 600. If it is determined that there is radial jamming between the bearing 400, the force measuring ring 500, and the squirrel cage spring support 600, delete the multiple second strain values of the force measuring ring 500 obtained during this group of loading processes, and drive the heating part 200 to move in the reverse direction until the loading space is separated from the heating cavity, and then repeat the above steps. Otherwise, record the multiple second strain values of the force measuring ring 500 obtained during this group of loading processes, and then repeat the above steps until at least three groups of multiple second strain values of the force measuring ring 500 obtained during the loading processes are recorded. Based on the multiple second strain values of the force measuring ring 500 obtained during at least three groups of loading processes, fit to obtain the coefficient of the force measuring ring 500, and complete the calibration.

[0074] Among them, when any group of tests is carried out, if the third strain value corresponding to this group shows an obvious change relative to the first strain value, it indicates that the force measuring ring 500 has not completely returned to the initial position, that is, it indicates that there is a great probability of radial jamming between the force measuring ring 500 or the bearing 400 and the squirrel cage elastic support 600. At this time, the test needs to be terminated temporarily, and multiple second strain values obtained in this group are deleted, and the bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600 are disassembled, repaired and processed, and then reassembled. Through the above method, the existence of radial jamming between the bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600 can be judged during the calibration process. Even if radial jamming occurs, it can be quickly disassembled. Before the engine test, the jamming situation between the bearing 400, the force measuring ring 500 and the squirrel cage elastic support 600 can be obtained during the calibration process of the force measuring ring 500, thereby greatly improving the efficiency of the subsequent engine test and reducing the time and labor costs required.

[0075] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A calibration test device for a force measuring ring, characterized in that, Comprising: A test bench (100); A heating part (200), which is movably arranged on the test bench (100), and a heating cavity is arranged inside the heating part (200); A loading part (300), which is arranged on the test bench (100), and a loading space is arranged on the loading part (300), and the loading space is used for placing the assembled bearing (400), the force measuring ring (500) and the squirrel cage spring support (600); The loading space is located inside the heating cavity; The heating part (200) can move in a direction away from the loading part (300) until the loading space disengages from the heating cavity.

2. The calibration test device for the force measuring ring according to claim 1, characterized in that, The loading part (300) includes: A lower tray (320), which is vertically arranged on the test bench (100), and a lower platform (321) is arranged at the top of the lower tray (320); An upper tray (310), which is coaxially arranged with the lower tray (320), and a lower platform (321) is arranged at the bottom of the upper tray (310); The upper platform (311) and the lower platform (321) are arranged at intervals to form the loading space; A loading mechanism (330), which is connected to the upper tray (310) to drive the upper platform (311) to move in the vertical direction.

3. The calibration test device for the force measuring ring according to claim 2, characterized in that, The heating part (200) includes: A heating box body (210), which is movably arranged on the test bench (100), and an opening is arranged on one side of the heating box body (210); An upper sliding groove is formed on the top wall of the heating box body (210), and the upper sliding groove is slidably connected to the top of the upper tray (310), and one end of the upper sliding groove extends to the opening side of the heating box body (210), and the other end extends to the middle of the top wall of the heating box body (210); A lower sliding groove is formed on the bottom wall of the heating box body (210), and the lower sliding groove is slidably connected to the bottom of the lower tray (320), and the lower sliding groove is symmetrically arranged with the upper sliding groove.

4. The calibration test device for the force measuring ring according to claim 3, characterized in that, When the top of the upper tray (310) is located in the middle of the top wall of the heating box body (210), an upper sealing block (220) is embedded in the upper sliding groove, one end of the upper sealing block (220) is arranged around the outer periphery of the top of the upper tray (310), and the other end is aligned with the end face of the opening side of the heating box body (210); When the bottom of the lower tray (320) is located in the middle of the bottom wall of the heating box body (210), a lower sealing block (230) is embedded in the lower sliding groove, one end of the lower sealing block (230) is arranged around the outer periphery of the bottom of the lower tray (320), and the other end is aligned with the end face of the opening side of the heating box body (210).

5. The calibration test device for the force measuring ring according to any one of claims 3 to 4, characterized in that An outer baffle is arranged on the opening side of the heating box body (210), one side of the outer baffle is hinged to the heating box body (210), and the other side of the outer baffle is clamped to the heating box body (210).

6. The calibration test device for the force measuring ring according to claim 5, characterized in that, A sliding rail (110) is arranged on the test bench (100), and the bottom of the heating box body (210) is slidably connected to the sliding rail (110).

7. The calibration test device for the force measuring ring according to claim 5, characterized in that, An observation window is arranged on the outer baffle.

8. The calibration test device for the force measuring ring according to claim 2, characterized in that, The loading part (300) further includes: A loading rod (340) has a first upright column at one end and a second upright column at the other end. The first upright column is used for clearance fit with the bearing (400). An insertion hole is formed in the upper platform (311), and the insertion hole is in clearance fit with the second upright column.

9. The calibration test device for the force measuring ring according to claim 2, characterized in that, The loading mechanism (330) includes: A guide rail (331) is erected on the test bench (100). A cross beam (332) is slidably connected to the guide rail (331), and the cross beam (332) is connected to the top end of the upper tray (310). A driving member is connected to the cross beam (332) to drive the cross beam (332) to drive the upper tray (310) to move in the vertical direction.

10. A calibration test method for a force measuring ring, using the calibration test device for the force measuring ring according to any one of claims 1 to 9, characterized in that, It includes the following steps: Complete the assembly of the bearing (400), the force measuring ring (500) and the squirrel cage spring support (600) and place them in the loading space, and then drive the heating part (200) to move until the loading space is accommodated in the heating cavity. Start the heating part (200), drive the temperature of the heating cavity to the preset temperature, and obtain the first strain value of the force measuring ring (500). Start the loading part (300), load the force measuring ring (500) in sequence according to multiple levels of preset loads, and obtain multiple second strain values of the force measuring ring (500) corresponding to the multiple levels of preset loads respectively. Turn off the loading part (300), unload the force measuring ring (500), and obtain the third strain value of the force measuring ring (500). Based on the first strain value and the third strain value, obtain the existence of radial jamming among the bearing (400), the force measuring ring (500) and the squirrel cage spring support (600). If it is judged that there is radial jamming among the bearing (400), the force measuring ring (500) and the squirrel cage spring support (600), delete the multiple second strain values of the force measuring ring (500) obtained during this group of loading processes, and drive the heating part (200) to move in the reverse direction until the loading space disengages from the heating cavity, and then repeat the above steps. Otherwise, record the multiple second strain values of the force measuring ring (500) obtained during this group of loading processes, and then repeat the above steps until at least three groups of loading processes' multiple second strain values of the force measuring ring (500) are recorded. Based on the multiple second strain values of the force measuring ring (500) obtained during at least three groups of loading processes, fit to obtain the coefficient of the force measuring ring (500) to complete the calibration.

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