Electromagnetic bearing static stiffness detection device
The servo motor-driven clamping system solves the problem of complex disassembly and assembly of existing electromagnetic bearing testing devices, enabling convenient clamping and efficient stiffness testing of bearings of any size, thus improving testing efficiency.
Patent Information
- Application Number
- CN202520428915.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing electromagnetic bearing testing devices have complex structures during disassembly and assembly, making it inconvenient to clamp the bearings and difficult to efficiently test the stiffness of electromagnetic bearings.
Two servo motors drive four clamping blocks to move relative to each other. Through the thread direction design of the first and second lead screws, combined with bevel gears and spline shafts, it can conveniently clamp and fix bearings of any size and specification, and combine pressure sensors to detect stiffness.
It enables convenient disassembly and assembly of electromagnetic bearings of any size and specifications, as well as efficient stiffness testing, thereby improving testing efficiency and automation.
Smart Images
Figure CN223769768U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electromagnetic bearing testing technology, and specifically discloses an electromagnetic bearing static stiffness testing device. Background Technology
[0002] Electromagnetic bearings are a new type of high-performance bearing. Compared with traditional ball bearings, sliding bearings, and oil film bearings, electromagnetic bearings have no mechanical contact, allowing the rotor to reach very high operating speeds. They offer advantages such as low mechanical wear, low energy consumption, low noise, long lifespan, no lubrication required, and no oil pollution, making them particularly suitable for high-speed, vacuum, and ultra-clean environments. They can be widely used in machining, turbomachinery, aerospace, vacuum technology, rotor dynamics identification and testing, and other fields.
[0003] After the electromagnetic bearing is manufactured, its stiffness needs to be tested before it leaves the factory to check whether the stiffness meets the standard. Existing testing devices are relatively complex in structure when disassembling and assembling bearings. After placing the bearing in the testing device, it is mostly necessary to manually rotate multiple threaded rods in sequence to clamp the bearing on the test table. The convenience of disassembling and assembling bearings is low. Therefore, an electromagnetic bearing static stiffness testing device is needed to solve this problem. Utility Model Content
[0004] This invention proposes an electromagnetic bearing static stiffness testing device, which uses two servo motors to drive four clamping blocks to move relative to each other to clamp and fix the bearing. It can fix bearings of any size and specifications, and the bearings are easy to install and remove.
[0005] This invention is implemented as follows: an electromagnetic bearing static stiffness testing device includes a test platform. An L-shaped plate is fixedly connected to the rear end face of the test platform. An electric actuator is mounted on the upper end face of the L-shaped plate. A pressure sensor is installed at the output end of the electric actuator. A thrust plate is installed on the lower end face of the pressure sensor. Two symmetrically distributed side plates are fixedly connected to the upper end face of the test platform. A first lead screw is rotatably connected between the two side plates. Slides are threaded to both ends of the outer wall of the first lead screw. Slide grooves are formed on the upper end faces of both slides. Second lead screws are rotatably connected inside the two slide grooves. Both ends of the outer walls of the two second lead screws are threaded with sliders. The upper surfaces of the four sliders are fixedly connected with clamps. The front surfaces of the two slides are fixedly connected with ear plates. The interior of the two ear plates is rotatably connected with sleeves. The right end surfaces of the two sleeves are fixedly connected with second bevel gears. The front ends of the two second lead screws extend to the outside of the two slides and are fixedly connected with first bevel gears. The two first bevel gears are respectively meshed with the two second bevel gears. A spline shaft is rotatably connected between the two side plates. The two sleeves and the two second bevel gears are slidably connected to the spline shaft.
[0006] In order to facilitate the relative or opposite movement of the two slides when the first lead screw rotates, the preferred embodiment of the electromagnetic bearing static stiffness testing device of this utility model has the thread directions of the left and right ends of the first lead screw being opposite.
[0007] In order to facilitate the two sliders to move relative to or away from each other when the second lead screw rotates, the thread directions at the front and rear ends of the second lead screw are preferably opposite in this invention's electromagnetic bearing static stiffness testing device.
[0008] To facilitate the rotation of the first lead screw and the spline shaft, in a preferred embodiment of the electromagnetic bearing static stiffness testing device of this invention, a first servo motor and a second servo motor are installed on the left end face of the left-side side plate. The output end of the first servo motor is fixedly connected to the first lead screw, and the output end of the second servo motor is fixedly connected to the spline shaft.
[0009] To facilitate stable left-right sliding of the two slides, as a preferred embodiment of the electromagnetic bearing static stiffness testing device of this utility model, two symmetrically distributed slide rods are fixedly connected between the two side plates, and both slides are slidably connected to the two slide rods.
[0010] To facilitate the fixing of the electromagnetic bearing, the preferred embodiment of the electromagnetic bearing static stiffness testing device of this utility model has a cross-section of an isosceles right triangle.
[0011] To facilitate equipment control, in a preferred embodiment of the electromagnetic bearing static stiffness testing device of this utility model, a controller is provided on the left end face of the left side plate, and the electric push rod, the first servo motor and the second servo motor are all electrically connected to the controller.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This electromagnetic bearing static stiffness testing device, through the cooperation of a second servo motor, splined shaft, sleeve, first bevel gear, second bevel gear, second lead screw, and slider, can adjust the distance between the clamping blocks on the front and rear sides. Through the cooperation of the first servo motor, first lead screw, slide rod, and slide table, it can drive the relative movement of the clamping blocks on the left and right sides to clamp and fix the bearing. By using two servo motors to drive the relative movement of four clamping blocks to clamp and fix the bearing, it can fix bearings of any size and specifications, and the bearing is easy to install and remove. Attached Figure Description
[0014] Figure 1 This is an overall structural diagram of an electromagnetic bearing static stiffness testing device according to the present invention.
[0015] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;
[0016] Figure 3 This is a top view of the slide table of this utility model;
[0017] Figure 4 This is a structural diagram of the clamping block of this utility model.
[0018] In the diagram, 1. Test bench; 2. Side plate; 3. L-shaped plate; 4. Electric actuator; 5. Thrust plate; 6. Pressure sensor; 7. First lead screw; 8. Slide rod; 9. Slide table; 10. Second lead screw; 11. Slider; 12. Clamping block; 13. First bevel gear; 14. Ear plate; 15. Sleeve; 16. Splined shaft; 17. Second bevel gear; 18. First servo motor; 19. Second servo motor; 20. Controller; 21. Slide groove. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 merely illustrative of the present utility model and are not intended to limit the present utility model.
[0020] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0021] Please see Figure 1-4An electromagnetic bearing static stiffness testing device includes a test bench 1. An L-shaped plate 3 is fixedly connected to the rear end face of the test bench 1. An electric push rod 4 is installed on the upper end face of the L-shaped plate 3. A pressure sensor 6 is installed at the output end of the electric push rod 4. A thrust plate 5 is installed on the lower end face of the pressure sensor 6. Two symmetrically distributed side plates 2 are fixedly connected to the upper end face of the test bench 1. A first lead screw 7 is rotatably connected between the two side plates 2. The left and right ends of the outer wall of the first lead screw 7 are threaded with slides 9. The upper end face of each slide 9 is provided with a groove 21. A second lead screw 10 is rotatably connected inside each of the two grooves 21. The front end of the outer wall of each of the two second lead screws 10 is... Both ends are threaded with sliders 11. The upper surfaces of the four sliders 11 are fixedly connected with clamps 12. The front surfaces of the two slides 9 are fixedly connected with ear plates 14. The inside of the two ear plates 14 is rotatably connected with sleeves 15. The right end surfaces of the two sleeves 15 are fixedly connected with second bevel gears 17. The front ends of the two second lead screws 10 extend to the outside of the two slides 9 and are fixedly connected with first bevel gears 13. The two first bevel gears 13 are respectively meshed with the two second bevel gears 17. The two side plates 2 are rotatably connected with spline shafts 16. The two sleeves 15 and the two second bevel gears 17 are slidably connected with spline shafts 16.
[0022] In this embodiment: The second servo motor 19 is started, which drives the spline shaft 16 to rotate, thereby driving the two sleeves 15 and the two second bevel gears 17 to rotate. The two second bevel gears 17 further drive the two first bevel gears 13 to rotate synchronously, thereby driving the two second lead screws 10 to rotate synchronously. The two second lead screws 10 further drive the sliders 11 and clamps 12 on the front and rear sides to move relative to or away from each other, thereby adjusting the distance between the two clamps 12. The distance between the two clamps 12 can be freely adjusted according to the size of the electromagnetic bearing to be detected. The first servo motor is started. The first servo motor 18 drives the first lead screw 7 to rotate, which in turn drives the two slides 9 to move relative to each other, thereby driving the clamping blocks 12 on the left and right sides to move relative to each other, clamping and fixing the bearing between the four clamping blocks 12. The electric push rod 4 is activated, which drives the push plate 5 to move downward and press on the electromagnetic bearing. The force exerted by the electromagnetic bearing on the push plate 5 can be collected by the pressure sensor 6, thereby detecting the stiffness of the electromagnetic bearing. This utility model uses two servo motors to drive four clamping blocks 12 to clamp and fix the electromagnetic bearing, which can fix bearings of any size and specifications, and makes it convenient to install and remove the bearing.
[0023] As a technical optimization of this utility model, the thread directions at the left and right ends of the first lead screw 7 are opposite.
[0024] In this embodiment, by setting the thread directions of the left and right ends of the first lead screw 7 to be opposite, it is convenient for the two slides 9 to move synchronously relative to each other or in opposite directions when the first lead screw 7 rotates.
[0025] As a technical optimization of this utility model, the thread directions at the front and rear ends of the second lead screw 10 are opposite.
[0026] In this embodiment, by setting the thread directions of the front and rear ends of the second lead screw 10 to be opposite, it is convenient for the two sliders 11 to move synchronously relative to each other or in opposite directions when the second lead screw 10 rotates.
[0027] As a technical optimization of this utility model, a first servo motor 18 and a second servo motor 19 are installed on the left end face of the left side plate 2. The output end of the first servo motor 18 is fixedly connected to the first lead screw 7, and the output end of the second servo motor 19 is fixedly connected to the spline shaft 16.
[0028] In this embodiment, the first servo motor 18 facilitates the rotation of the first lead screw 7, and the second servo motor 19 facilitates the rotation of the spline shaft 16, saving time and effort.
[0029] As a technical optimization of this utility model, two symmetrically distributed slide rods 8 are fixedly connected between the two side plates 2, and the two slide tables 9 are slidably connected to the two slide rods 8.
[0030] In this embodiment, two sliding rods 8 are used to limit the movement of the slide table 9, which facilitates the stable left and right movement of the slide table 9.
[0031] As a technical optimization of this utility model, the cross-section of the clamping block 12 is an isosceles right triangle.
[0032] In this embodiment, the cross-section of the clamping block 12 is set as an isosceles right triangle to facilitate the fixing of the electromagnetic bearing.
[0033] As a technical optimization of this utility model, a controller 20 is provided on the left end face of the left side plate 2, and the electric push rod 4, the first servo motor 18 and the second servo motor 19 are all electrically connected to the controller 20.
[0034] In this embodiment, the device is controlled by the controller 20, which saves time and effort and improves the degree of automation.
[0035] The working principle and usage process of this utility model are as follows: First, the second servo motor 19 is started. The second servo motor 19 drives the spline shaft 16 to rotate, which in turn drives the two sleeves 15 and the two second bevel gears 17 to rotate. The two second bevel gears 17 further drive the two first bevel gears 13 to rotate synchronously, which in turn drives the two second lead screws 10 to rotate synchronously. The two second lead screws 10 further drive the sliders 11 and clamping blocks 12 on both sides to move relative to or away from each other, thereby adjusting the distance between the two clamping blocks 12. After adjusting the distance between the two clamping blocks 12 to a suitable position according to the required size of the electromagnetic bearing to be tested, the electromagnetic bearing is placed... Between the four clamping blocks 12, the first servo motor 18 is started, which drives the first lead screw 7 to rotate, thereby driving the two slides 9 to move relative to each other, which in turn drives the clamping blocks 12 on the left and right sides to move relative to each other, clamping and fixing the bearing between the four clamping blocks 12. Then, the electric push rod 4 is started, which drives the push plate 5 to move downward and press on the electromagnetic bearing. The force exerted by the electromagnetic bearing on the push plate 5 can be collected by the pressure sensor 6, thereby detecting the stiffness of the electromagnetic bearing. This utility model uses two servo motors to drive four clamping blocks 12 to clamp and fix the electromagnetic bearing, which can fix bearings of any size and specifications, and the bearing is easy to install and remove.
[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An electromagnetic bearing static stiffness detection device comprising a test bench (1), characterized in that: The rear end face of the test bench (1) is fixedly connected with an L-shaped plate (3), the upper end face of the L-shaped plate (3) is provided with an electric push rod (4), the output end of the electric push rod (4) is provided with a pressure sensor (6), the lower end face of the pressure sensor (6) is provided with a thrust disc (5), the upper end face of the test bench (1) is fixedly connected with two symmetrically distributed side plates (2), the first screw rod (7) is rotatably connected between the two side plates (2), the left and right ends of the outer wall of the first screw rod (7) are both threadedly connected with a sliding table (9), the upper end faces of the two sliding tables (9) are both provided with a sliding groove (21), the interiors of the two sliding grooves (21) are both rotatably connected with a second screw rod (10), the front and rear ends of the outer wall of the second screw rod (10) are both threadedly connected with a sliding block (11), the upper end faces of the four sliding blocks (11) are all fixedly connected with a clamping block (12), the front end faces of the two sliding tables (9) are both fixedly connected with an ear plate (14), the interiors of the two ear plates (14) are both rotatably connected with a sleeve (15), the right end faces of the two sleeves (15) are both fixedly connected with a second bevel gear (17), the front ends of the two second screw rods (10) are respectively extended to the outside of the two sliding tables (9) and are both fixedly connected with a first bevel gear (13), the two first bevel gears (13) are respectively meshed with the two second bevel gears (17), the spline shaft (16) is rotatably connected between the two side plates (2), and the two sleeves (15) and the two second bevel gears (17) are both slidably connected with the spline shaft (16).
2. The electromagnetic bearing static stiffness detection device of claim 1, wherein: The thread directions of the left and right ends of the first screw rod (7) are opposite.
3. The electromagnetic bearing static stiffness detection device of claim 1, wherein: The thread directions of the front and rear ends of the second screw rod (10) are opposite.
4. The electromagnetic bearing static stiffness detection device of claim 1, wherein: The left end face of the left side plate (2) is provided with a first servo motor (18) and a second servo motor (19), the output end of the first servo motor (18) is fixedly connected with the first screw rod (7), and the output end of the second servo motor (19) is fixedly connected with the spline shaft (16).
5. The electromagnetic bearing static stiffness detection device of claim 1, wherein: The two side plates (2) are fixedly connected with two symmetrically distributed sliding rods (8), and the two sliding tables (9) are slidably connected with the two sliding rods (8).
6. The electromagnetic bearing static stiffness detection device of claim 1, wherein: The cross section of the clamping block (12) is an isosceles right triangle.
7. The electromagnetic bearing static stiffness detection device of claim 4, wherein: The left end face of the left side plate (2) is provided with a controller (20), and the electric push rod (4), the first servo motor (18) and the second servo motor (19) are all electrically connected with the controller (20).