A bearing auxiliary detection device for flywheel energy storage system

Abstract

The present invention discloses a bearing auxiliary detection device for a flywheel energy storage system, which relates to the technical field of bearing detection. The device comprises an upper shell, an annular shell is rotatably mounted on one end of the upper shell, a component to be tested is provided on the upper shell, a test component is fixedly mounted on the annular shell, the test component comprises a main bracket, a driving wheel, and a sliding frame, the driving wheel is in contact with the component to be tested, the driving wheel is used to drive the component to be tested to rotate, a pressure spring is fixedly mounted on the main bracket, and an adjustment plate is fixedly mounted on the other end of the pressure spring. The device adjusts the pre-pressure of the pressure spring so that the withstand pressure value of the static pressure test of the component to be tested can be adjusted during the test, and at the same time, the position of the main bracket on the lower shell is manually adjusted to change the force direction of the component to be tested. This not only reduces the adjustment process of the static load detection, but also accurately controls the angle of change of the static load orientation.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing detection, and in particular to a bearing auxiliary detection device for a flywheel energy storage system. Background Art

[0002] Flywheel energy storage, as a highly efficient energy storage and conversion technology, holds significant application prospects in the modern energy sector. It converts electrical energy into mechanical energy in a flywheel for storage, and then converts the mechanical energy back into electrical energy when needed, providing rapid power support to power systems.

[0003] In a flywheel energy storage system, bearings are one of the most critical components. The flywheel speed in a flywheel energy storage system is usually greater than 10,000 rpm. At this time, the bearings in the flywheel energy storage system need to withstand continuous centrifugal force, alternating loads and transient impacts. Therefore, in order to ensure that the flywheel can operate stably and accurately during the energy storage and release process, the performance of its bearings directly affects the efficiency, reliability and service life of the flywheel energy storage system.

[0004] The Chinese invention patent with announcement number CN111197969B discloses a magnetic bearing rotor position detection device. This device uses the reference surface on the positioning seat as a reference to accurately calibrate the sensor. When the distance between the detected surface on the rotor and the reference surface is constant, the output value of the sensor is equal. During installation, it is only necessary to ensure the relative position of the positioning seat and the support frame, and the positioning sensor can be quickly replaced.

[0005] In the above patents and prior art, used bearings or new bearings are generally tested by applying static and dynamic loads to the bearings. The clearance between the inner and outer rings of the magnetic bearings under different load conditions is monitored through the two testing methods. When the bearings are subjected to static load tests, conventional detection devices rely on replacing counterweights or mechanical fixtures to adjust the pressure, which is time-consuming and difficult to achieve continuous load changes. At the same time, traditional testing methods generally change the load direction through multi-station fixtures, resulting in an angle adjustment error of more than three degrees, which cannot meet the needs of high-precision bearing simulation of multi-dimensional forces. Summary of the Invention

[0006] In view of the above technical problems, the present invention proposes the following technical solutions:

[0007] A bearing auxiliary detection device for a flywheel energy storage system comprises an upper shell, an annular shell is rotatably mounted on one end of the upper shell, a lower shell is rotatably mounted on the end of the annular shell away from the upper shell, a component to be tested is arranged on the upper shell, a test component is fixedly mounted on the annular shell, the test component comprises a main bracket, a driving wheel, and a sliding frame, the sliding frame is fixedly connected to the annular shell, one side of the sliding frame is slidably connected to the main bracket, the driving wheel is rotatably mounted on the end of the main bracket away from the sliding frame, the driving wheel contacts the component to be tested, and the driving wheel is used to drive the component to be tested. The measuring component rotates, and a pressure spring is fixedly installed on the main bracket. The pressure spring is used to provide lateral pressure to the driving wheel. An adjustment plate is fixedly installed on the other end of the pressure spring, and the adjustment plate is slidably installed on the sliding frame. An adjusting screw is rotatably installed on the sliding frame, and the adjusting screw is connected to the adjusting plate through a thread. After the driving wheel contacts the component under test, the pressure spring applies a predetermined pressure to the driving wheel, so that the driving wheel squeezes the test shaft in the component under test in a unidirectional direction and performs detection; multiple groups of observation components are arranged in the upper shell, and multiple observation components are evenly distributed in the upper shell.

[0008] Furthermore, a positioning spring is fixedly installed on the sliding frame, a positioning block is fixedly installed on the other end of the positioning spring, the positioning block is slidably connected to the sliding frame, a plurality of fixed teeth are provided on the positioning block, and a plurality of fixed slots are provided on the outer wall of the lower shell, and the fixed slots are engaged with the fixed teeth on the positioning block.

[0009] Furthermore, the component under test includes a magnetic bearing, a support ring, and a test shaft. The magnetic bearing is arranged and installed on the outside of the test shaft. During installation, the inner ring of the magnetic bearing is interference-connected with the outer wall of the test shaft, and the outer ring of the magnetic bearing is interference-connected with the inner wall of the support ring.

[0010] Furthermore, a rotating screw is fixedly installed on the test shaft, a limit ring is threadedly installed on the rotating screw, the limit ring is slidingly connected to the test shaft, the limit ring is used to limit the position of the magnetic levitation bearing on the test shaft, and the support ring is fixedly installed on the upper shell.

[0011] Furthermore, the observation assembly includes a roller, an observation frame, and an observation spring. The observation frame is radially slidably mounted on the upper shell. The roller is mounted at one end of the observation frame, and the roller contacts the outer wall of the test shaft.

[0012] Furthermore, one end of the observation spring is fixedly connected to the observation spring, and the other end of the observation spring is fixedly connected to the upper shell. The observation spring provides a force for the observation frame and the roller to approach the axis of the test shaft.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: (1) the device adjusts the preload of the pressure spring so that the withstand pressure value of the static pressure test can be adjusted during the test of the component under test, and at the same time, the force direction of the component under test can be changed by manually adjusting the position of the main bracket on the lower shell. This not only reduces the adjustment process of the static load test, but also accurately controls the angle of change of the static load orientation; (2) the device makes the test shaft in the component under test closely contact with the magnetic levitation bearing, so that the test shaft simulates the main shaft state when the magnetic levitation bearing is in use, and then tests the magnetic levitation bearing, which can further improve the accuracy of the test data. At the same time, by extending the length of the test shaft in the upper shell, the reaction of the magnetic levitation bearing after offset is improved, so that the user can capture it more accurately; (3) the device simulates the state of the magnetic levitation bearing during use by conducting static and dynamic load experiments, so as to facilitate the user to better observe the various operating conditions of the magnetic levitation bearing and improve the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the cross-section structure of the upper housing, lower housing, annular housing, and inner gear ring of the present invention.

[0016] Figure 3 This is a schematic diagram of the cross-section structure of the magnetic bearing, upper shell, support ring, fixing ring, limit ring, and test shaft of the present invention.

[0017] Figure 4 This is a schematic diagram of the cross-section structure of the lower outer shell, annular shell, and inner gear ring of the present invention.

[0018] Figure 5 This is a schematic diagram of the test shaft structure of the present invention.

[0019] Figure 6 This is a schematic diagram of the drive wheel structure of the present invention.

[0020] Figure 7 This is a schematic diagram of the cross-section structure of the main bracket of the present invention.

[0021] Figure 8 This is a schematic diagram of the cross-section structure of the main bracket, sliding bracket, and adjustment plate of the present invention.

[0022] Figure markings: 100-magnetic bearing; 101-upper shell; 102-side bracket; 103-lower shell; 104-main motor; 105-annular shell; 106-support ring; 107-fixing ring; 109-limiting ring; 110-rotating screw; 111-anti-slip gasket; 201-test shaft; 202-roller; 203-observation frame; 204-observation spring; 301-gearbox; 302-inner ring; 303-main bracket; 304-driving wheel; 305-lower gear; 306-intermediate gear; 307-belt; 308-extrusion rod; 309-extrusion spring; 310-side gear; 311-sliding frame; 312-pressure spring; 313-adjusting screw; 314-adjusting plate; 315-positioning block; 316-positioning spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] like Figures 1 to 3 As shown, a bearing auxiliary detection device for a flywheel energy storage system includes an upper shell 101, a side bracket 102 is fixedly installed on the outside of the upper shell 101, the side bracket 102 is used to support the device, and the connection between the side bracket 102 and the ground is fixed by bolts. When the device is in use, the device needs to be fixed to the ground, and an annular shell 105 is rotatably installed on one end of the upper shell 101, and a lower shell 103 is rotatably installed on the end of the annular shell 105 away from the upper shell 101. The outer wall of the lower shell 103 is fixedly connected to the side bracket 102, and the annular shell 105 is located between the lower shell 103 and the upper shell 101. The upper shell 101 and the lower shell 103 are both supporting components of the device, and a plurality of bolt columns are provided on the upper shell 101.

[0025] like Figures 2 to 4 As shown, a component to be tested is provided on the upper shell 101, and the component to be tested includes a magnetic bearing 100, a support ring 106, and a test shaft 201. The magnetic bearing 100 is arranged and installed on the outside of the test shaft 201. During installation, the inner ring of the magnetic bearing 100 is interference-connected with the outer wall of the test shaft 201, and the outer ring of the magnetic bearing 100 is interference-connected with the inner wall of the support ring 106. A rotating screw 110 is fixedly installed on the test shaft 201, and a limit ring 109 is threadedly installed on the rotating screw 110. The limit ring 109 is slidably connected to the test shaft 201. The limit ring 109 is used to limit the position of the magnetic bearing 100 on the test shaft 201, and an anti-slip gasket 111 is provided between the limit ring 109 and the inner ring of the magnetic bearing 100 to prevent slipping.

[0026] like Figures 1 to 4As shown, a plurality of mounting holes are provided on the support ring 106, and the support ring 106 is fixedly mounted on the upper shell 101. The support ring 106 is fixed by fitting with the bolt columns on the upper shell 101 through the mounting holes, and a fixing ring 107 is movably mounted on the support ring 106. The fixing ring 107 is used to limit the freedom of the magnetic bearing 100. The fixing ring 107 and the support ring 106 are also fixed by the bolt columns on the upper shell 101. After the support ring 106 and the fixing ring 107 are installed on the bolt columns, the hexagonal nuts that match the bolt columns can be installed on the upper shell 101 to tighten the support ring 106 and the fixing ring 107. In this state, the component under test is completely fixed on the upper shell 101, and when the test is in progress, the test shaft 201 and the inner ring of the magnetic bearing 100 will rotate together.

[0027] like Figures 2 to 4 As shown, multiple groups of observation components are provided in the upper shell 101, and the multiple observation components are evenly distributed in the upper shell 101. The observation components include a roller 202, an observation frame 203, and an observation spring 204. The observation frame 203 is radially slidably installed on the upper shell 101, and the roller 202 is installed at one end of the observation frame 203. The roller 202 contacts the outer wall of the test shaft 201. One end of the observation frame 203 is fixedly connected to the observation spring 204, and the other end of the observation spring 204 is fixedly connected to the upper shell 101. The observation spring 204 provides a force for the observation frame 203 and the roller 202 to approach the axis of the test shaft 201. The observation frame 203 is connected to the electronic control device. When the observation frame 203 is displaced relative to the upper shell 101, an electronic control signal will be generated to prompt the user. When any group of observation components generates an electronic control signal, it means that the test shaft 201 in the tested component has an axial deviation, that is, in this case, the magnetic levitation bearing 100 is in an unqualified state.

[0028] like Figure 2 、 Figure 4 、 Figure 5 、 Figure 7 As shown, the main motor 104 is fixedly installed on the bottom of the lower shell 103, and the output shaft of the main motor 104 is fixedly installed with a gearbox 301. The gearbox 301 is used to change the speed of the main motor 104. The input shaft of the gearbox 301 is connected to the main shaft of the main motor 104. The output shaft of the gearbox 301 is fixedly installed with an inner ring gear 302, and the inner ring gear 302 is rotatably connected to the inner wall of the lower shell 103.

[0029] like Figures 4 to 8As shown, a test assembly is fixedly mounted on the annular shell 105, and the test assembly includes a main bracket 303, a driving wheel 304, and a sliding frame 311. The sliding frame 311 is fixedly connected to the annular shell 105, and one side of the sliding frame 311 is slidably connected to the main bracket 303. The driving wheel 304 is rotatably mounted on the end of the main bracket 303 away from the sliding frame 311. The driving wheel 304 contacts the component under test and is used to drive the component under test to rotate. A pressure spring 312 is fixedly mounted on the main bracket 303, and the pressure spring 312 is used to provide lateral pressure to the driving wheel 304. An adjustment plate 314 is fixedly mounted on the other end of the pressure spring 312. The adjustment plate 314 is slidably mounted above the sliding frame 311. The adjustment plate 314 is arranged on the outside of the annular shell 105. An adjusting screw 313 is rotatably mounted on the sliding frame 311, and the adjusting screw 313 is connected to the adjustment plate 314 through a thread. After the driving wheel 304 contacts the test shaft 201 in the component under test, the pressure spring applies an external force to the test shaft 201 through the driving wheel 304. At this time, the test shaft 201 is subjected to a force perpendicular to the axial direction, so that the test shaft 201 can simulate the state of the magnetic bearing 100 when it is subjected to a unidirectional load. In this case, the data of the offset of the inner ring of the magnetic bearing 100 relative to the outer ring can be detected. When the offset of any point of the inner ring of the magnetic bearing 100 relative to the outer ring is greater than 10 microns, the magnetic bearing 100 is unqualified. When the magnetic bearing 100 is subjected to a load, its observation component determines the displacement of the inner ring of the magnetic bearing 100 by collecting the displacement of the test shaft 201. The user can adjust the preload on the pressure spring 312 by turning the adjustment screw 313, thereby changing the magnitude of the force applied to the test shaft 201, so as to facilitate testing under different usage conditions.

[0030] like Figures 4 to 8 When the cam 315 is in the closed position, the cam 316 is in the closed position, and the cam 316 is in the closed position, so that the cam 316 can be fixed to the cam 316 by the cam 316 protrusion.

[0031] like Figures 4 to 8As shown, a lower gear 305 is fixedly mounted on the driving wheel 304, an intermediate gear 306 is meshed with the lower gear 305, a side gear 310 is rotatably mounted on the sliding frame 311, the side gear 310 is meshed with the inner gear ring 302, a belt 307 is provided on the side gear 310, the other end of the belt 307 is provided on the intermediate gear 306 for transmitting power, the belt 307 here needs to use a belt material with greater elasticity, an extrusion rod 308 is slidably mounted on the main bracket 303, the extrusion rod 308 is in contact with the outer wall of the belt 307, an extrusion spring 309 is fixedly mounted on the extrusion rod 308, and the other end of the extrusion spring 309 is fixed It is fixedly installed on the main bracket 303, and the extrusion spring 309 and the extrusion rod 308 are used to limit the belt 307. When the main bracket 303 moves toward the sliding bracket 311, the distance between the middle gear 306 and the side gear 310 will become smaller. Then, if the belt 307 is not interfered by external force, it will become loose. At this time, the extrusion rod 308 will cause the extrusion spring 309 to be less stressed due to the loosening of the belt 307, so the distance between the two extrusion rods 308 will become smaller, thereby applying a certain degree of pressure to the belt 307 to ensure that the wrap angle of the belt 307 to the middle gear 306 and the side gear 310 can reach the normal transmission level.

[0032] When using this device, you must first assemble the component to be tested. First, make interference fit between the inner ring and outer ring of the magnetic bearing 100 and the outer wall of the test shaft 201 and the inner wall of the support ring 106 respectively. Then, place the anti-slip gasket 111 on the inner ring of the magnetic bearing 100. Finally, thread the limit ring 109 with the rotating screw 110. Then, drive the limit ring 109 to contact the anti-slip gasket 111 by rotating the rotating screw 110. In this way, the limit ring 109 can limit the degree of freedom of the inner ring of the magnetic bearing 100. At this time, the magnetic bearing 100 will be fixedly connected to the test shaft 201, and then the support ring 106 and the fixing ring 107 are installed on the upper shell. 101, thus completing the assembly of the tested component. After the tested component is assembled, the outer ring of the magnetic bearing 100, the support ring 106 and the fixing ring 107 are fixed, while the inner ring of the magnetic bearing 100, the test shaft 201 and the limit ring 109 can rotate relative to the upper shell 101. After the test shaft 201 is installed, it is also necessary to adjust the state of the observation component so that the observation component returns to the zero state, and subsequent tests are also carried out around the test shaft 201. This is because the test shaft 201 is equivalent to the extension of the magnetic bearing 100, and the test shaft 201 can serve as the main shaft of the magnetic bearing 100 used in the flywheel energy storage system.

[0033] When testing, it is carried out in steps. The first is a static suspension test. During the test, a directional force can be applied to the magnetic suspension bearing 100 to distinguish the gap state between the inner and outer rings of the magnetic suspension bearing 100. During the test, the user turns the adjustment screw 313 to increase the radial extrusion force on the test shaft 201 to apply actual pressure. It should be noted that during the pressure application process, the driving wheel 304 is finally in contact with the test shaft 201, so the driving wheel 304 is fixed at this time. After a certain period of static load test, the user can adjust the pressure by himself. The load orientation can be changed by rotating the test shaft 201. At the same time, the positioning block 315 can be pulled to release the restriction on the sliding frame 311. Then, the sliding frame 311 can be manually pulled to rotate on the lower shell 103 to change the orientation of the static load. This not only reduces the adjustment process of the static load test, but also can accurately control the angle of change of the static load orientation. When the static load test is carried out, the cooperation of the observation component is required. When the observation frame 203 in any observation component moves beyond the predetermined range, the magnetic levitation bearing 100 can be judged as unqualified.

[0034] After the static load test is completed, the dynamic load test can be carried out, that is, when the inner ring of the magnetic bearing 100 rotates at high speed, a certain directional load test is applied to the magnetic bearing 100. First, the rotation of the magnetic bearing 100 is achieved by starting the main motor 104, allowing the main motor 104 to change the torque and speed through the gearbox 301, and then driving the inner ring gear 302 to rotate. The rotation of the inner ring gear 302 then drives the driving wheel 304 to rotate through the side gear 310, belt 307, intermediate gear 306, and lower gear 305, allowing the driving wheel 304 to drive the test shaft 201 to rotate, and the test shaft 201 rotates. At the same time, the driving wheel 304 will also apply pressure to the test shaft 201 through the pressure spring 312. At this time, during the high-speed rotation of the test shaft 201, the magnetic bearing 100 is subjected to directional pressure, which is also the state of the magnetic bearing 100 in the flywheel energy storage system. In this state, when the observation frame 203 in any observation component moves beyond the predetermined range (generally 5-8 microns), it can be determined that the magnetic bearing 100 is unqualified. After completing the above two tests, the tested component can be removed, and the magnetic bearing 100 can also be removed from the test shaft 201 at the same time.

[0035] The present invention is not limited to the above-mentioned specific implementation methods. Various changes made by technicians in the relevant technical field based on the above-mentioned conception without creative work are all within the scope of protection of the present invention.

Claims

1. A bearing auxiliary detection device for a flywheel energy storage system, comprising an upper housing (101), an annular housing (105) being rotatably mounted on one end of the upper housing (101), and a lower housing (103) being rotatably mounted on one end of the annular housing (105) away from the upper housing (101), characterized in that: The upper shell (101) is provided with a component to be tested, and the annular shell (105) is fixedly provided with a test component, and the test component comprises a main support (303), a driving wheel (304), and a sliding frame (311), wherein the sliding frame (311) is fixedly connected to the annular shell (105), and one side of the sliding frame (311) is slidably connected to the main support (303), and the driving wheel (304) is rotatably installed on an end of the main support (303) away from the sliding frame (311), and the driving wheel (304) contacts the component to be tested, and the driving wheel (304) is used to drive the component to be tested to rotate, and the main support (303) is fixedly provided with a driving wheel (304). a pressure spring (312), the pressure spring (312) is used to provide lateral pressure to the driving wheel (304), an adjustment plate (314) is fixedly mounted on the other end of the pressure spring (312), the adjustment plate (314) is slidably mounted on the sliding frame (311), an adjustment screw (313) is rotatably mounted on the sliding frame (311), the adjustment screw (313) and the adjustment plate (314) are connected by threads, after the driving wheel (304) contacts the component under test, the pressure spring (312) applies a predetermined pressure to the driving wheel (304), so that the driving wheel (304) unidirectionally squeezes the test shaft (201) in the component under test and performs testing; The tested component comprises a magnetic suspension bearing (100), a support ring (106), and a test shaft (201); the magnetic suspension bearing (100) is arranged and installed outside the test shaft (201); during installation, the inner ring of the magnetic suspension bearing (100) is in interference connection with the outer wall of the test shaft (201); and the outer ring of the magnetic suspension bearing (100) is in interference connection with the inner wall of the support ring (106); A rotating screw (110) is fixedly mounted on the test shaft (201), a limiting ring (109) is threadedly mounted on the rotating screw (110), the limiting ring (109) is slidably connected to the test shaft (201), and the limiting ring (109) is used to limit the position of the magnetic suspension bearing (100) on the test shaft (201), and the support ring (106) is fixedly mounted on the upper housing (101); Multiple groups of observation components are arranged in the upper housing (101), and the multiple observation components are evenly distributed in the upper housing (101); The observation assembly comprises a roller (202), an observation frame (203), and an observation spring (204); the observation frame (203) is radially slidably mounted on the upper housing (101); the roller (202) is mounted on one end of the observation frame (203); and the roller (202) contacts the outer wall of the test shaft (201); One end of the observation frame (203) is fixedly connected to the observation spring (204), and the other end of the observation spring (204) is fixedly connected to the upper housing (101). The observation spring (204) provides a force for the observation frame (203) and the roller (202) to approach the axis of the test shaft (201).

2. The bearing auxiliary detection device for a flywheel energy storage system according to claim 1, characterized in that: A positioning spring (316) is fixedly mounted on the sliding frame (311), a positioning block (315) is fixedly mounted on the other end of the positioning spring (316), the positioning block (315) is slidably connected to the sliding frame (311), a plurality of fixed teeth are provided on the positioning block (315), and a plurality of fixed slots are provided on the outer wall of the lower shell (103), the fixed slots being engaged with the fixed teeth on the positioning block (315).

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