Axial force testing device of magnetic suspension bearing

Abstract

The utility model discloses an axial force testing device for magnetic suspension bearings, which comprises a first testing frame, a second testing frame, a simulation rotor and a testing component, two magnetic suspension bearings are respectively arranged on the first testing frame and the second testing frame, when the two magnetic suspension bearings are in a working state, two ends of the simulation rotor are in a suspension state, and the testing component is arranged on the simulation rotor. The testing part comprises an operation part and a force measuring part, the operation part pushes the force measuring part to move on the first side of the first horizontal direction and cooperates with the force measuring part to push the simulation rotor in the suspended state to move, so that the simulation rotor moves in the axial direction, and the force measuring part is used for measuring the force when the simulation rotor in the suspended state moves. According to the axial force testing device for the magnetic suspension bearing, the axial force of the simulation rotor in the suspension state along the second side of the first horizontal direction is detected, the testing precision is greatly improved through the cooperation of the operation part and the force measuring piece, meanwhile, the testing efficiency is high, and the fast-paced production requirement is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic suspension, in particular to an axial force testing device for a magnetic suspension bearing. Background Art

[0002] With the development of magnetic levitation technology, high-speed magnetic levitation motors are increasingly being used across various industries. Conventional motors use mechanical bearings to support their shafts, resulting in relatively low speeds. These speeds are typically increased through gear mechanisms, which incur transmission losses and mechanical friction. Magnetic levitation motors, on the other hand, utilize magnetic bearings to support their shafts, using electromagnetic force to suspend them in space. This allows for high-speed operation, lacks mechanical friction, and offers long lifespans and low noise.

[0003] At present, before the magnetic levitation bearing is put into use as a whole, it is necessary to test the axial force of the simulated rotor in the suspended state. Only after the maximum axial force of the simulated rotor is tested can it be used subsequently. Most of the existing testing methods are manual testing. Obviously, the manual testing method has the problems of low testing efficiency and poor testing accuracy. Utility Model Content

[0004] The purpose of the utility model is to provide an axial force testing device for a magnetic bearing, so as to solve the problem of poor testing accuracy in conventional testing devices in the prior art.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A device for testing the axial force of a magnetic bearing, wherein the magnetic bearing assembly comprises a base, a first test frame, a second test frame, a simulated rotor, and a test component, wherein:

[0007] The first test frame and the second test frame are arranged on the base at intervals, and the first test frame and the second test frame are both installed with magnetic bearings to be tested at the same height. The two ends of the simulated rotor are respectively passed through the two magnetic bearings to be tested. The magnetic bearings to be tested can be in a working state or a non-working state. When the two magnetic bearings to be tested are in the working state, the two ends of the simulated rotor are in a suspended state.

[0008] The test component includes an operating portion and a force-measuring member, wherein the operating portion is reciprocally movable along a first horizontal direction on the second test frame, and the force-measuring member is located between the operating portion and an end portion of the simulated rotor in a suspended state, wherein a movable end of the operating portion is connected to a first end of the force-measuring member, and a second end of the force-measuring member is connected to an end portion of the simulated rotor in a suspended state;

[0009] The operating part is configured to push the force measuring piece to move on the first side of the first horizontal direction, and cooperate with the force measuring piece to push the simulated rotor in the suspended state to move, so that the simulated rotor in the suspended state moves axially. The force measuring piece is configured to detect the axial force of the simulated rotor on the second side of the first horizontal direction when the simulated rotor in the suspended state moves.

[0010] Furthermore, the first test frame is fixedly arranged at the first end of the base, and the second test frame can be arranged at the second end of the base along the first horizontal direction close to or away from the first test frame, and the simulated rotors of different specifications can be adapted by changing the spacing between the second test frame and the first test frame.

[0011] Furthermore, the operating portion includes two threaded rods symmetrically arranged on the second test frame along the second horizontal direction, two adjusting nuts and an operating rod, wherein:

[0012] The two threaded rods extend along a first horizontal direction, each threaded rod corresponds to one adjusting nut, each threaded rod is provided with an external threaded section, and an internal threaded hole is provided on the adjusting nut corresponding to the external threaded section. The two ends of the operating rod are respectively movably mounted on the two threaded rods, and the force measuring member includes a force gauge, a first end of the force gauge abuts against the middle portion of the operating rod, and a second end of the force gauge is connected to one end of the simulated rotor;

[0013] By adjusting the two adjusting nuts to move toward the first side of the first horizontal direction, the operating rod pushes the dynamometer to move, and the dynamometer squeezes one end of the simulated rotor in the suspended state, so that the simulated rotor in the suspended state moves axially, and then cooperates with the dynamometer to detect the axial force of the simulated rotor in the suspended state along the second side of the first horizontal direction.

[0014] Furthermore, the second test frame is slidably disposed on the base via a guide assembly.

[0015] Furthermore, the guide assembly includes two guide rails laid at intervals on the base and two sliders, each slider is arranged corresponding to one guide rail, each guide rail extends along a first horizontal direction, each slider can be slidably set on the corresponding guide rail, the second test frame is installed on the two sliders, and the second test frame is slidably mounted on the base through a sliding pair composed of the guide rails and the sliders.

[0016] Furthermore, the magnetic bearing provided on the first test frame is detachably mounted on the first test frame via a first disassembly component, and the magnetic bearing provided on the second test frame is detachably mounted on the second test frame via a second disassembly component.

[0017] Furthermore, the first disassembly and assembly part uses a plurality of first disassembly and assembly screws, and a first disassembly and assembly screw hole is opened on the first test frame corresponding to each first disassembly and assembly screw, and a first through hole is opened in the circumference of the magnetic bearing to cooperate with each first disassembly and assembly screw. The tail of each first disassembly and assembly screw passes through the corresponding first through hole of the magnetic bearing and is locked in the corresponding first disassembly and assembly screw hole to fix the magnetic bearing set on the first test frame on the first test frame.

[0018] Furthermore, the second disassembly and assembly part uses a plurality of second disassembly and assembly screws, and a second disassembly and assembly screw hole is opened on the second test frame corresponding to each second disassembly and assembly screw, and a second through hole is opened in the circumference of the magnetic bearing to cooperate with each second disassembly and assembly screw. The tail of each second disassembly and assembly screw passes through the corresponding second through hole of the magnetic bearing and is locked in the corresponding second disassembly and assembly screw hole to fix the magnetic bearing set on the second test frame on the second test frame.

[0019] Compared with the prior art, the advantageous effects of the axial force testing device for magnetic bearings are:

[0020] 1) Through the cooperation of the operating unit and the force-measuring member, the operating unit pushes the force-measuring member on a first side in a first horizontal direction, and cooperates with the force-measuring member to push the simulated rotor in a suspended state to move, causing the simulated rotor in the suspended state to move axially. As the simulated rotor moves, the force-measuring member detects the axial force of the simulated rotor in the suspended state along a second side in the first horizontal direction, greatly improving test accuracy and efficiency, meeting the requirements of fast-paced production.

[0021] 2) By changing the distance between the second test frame and the first test frame, magnetic bearing assemblies of different specifications can be tested, further improving the versatility of the magnetic bearing test;

[0022] 3) By adjusting the cooperation between the nut and the threaded rod, a test structure with convenient operation and high precision is provided. At the same time, the axial force of the simulated rotor is tested in conjunction with a dynamometer, and the value of the axial force can be directly read, with high test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, a brief introduction is given below to the background technology of the present invention and the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the axial force testing device of the magnetic bearing provided by an embodiment of the present utility model;

[0025] Figure 2 1 is a schematic top view of an axial force testing device for a magnetic bearing provided by an embodiment of the present invention;

[0026] Figure 3 It is a schematic front view of an axial force testing device for a magnetic bearing provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0028] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly attached to the other component or there can be a central component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0029] See also Figures 1 to 3As shown, in this embodiment, an axial force testing device for a magnetic bearing includes a base 10, a first test frame 20, a second test frame 30, a simulated rotor 40 and a test component 50, wherein: the first test frame 20 and the second test frame 30 are spaced apart on the base 10, and the first test frame 20 and the second test frame 30 are both installed with a magnetic bearing 60 to be tested at the same height, and the two ends of the simulated rotor 40 are respectively passed through the two magnetic bearings 60 to be tested, and the magnetic bearings 60 to be tested can be in a working state or a non-working state. When the two magnetic bearings 60 to be tested are in a working state, the two ends of the simulated rotor 40 are in a suspended state; the test component 50 includes an operating part 51 and a force measuring piece 52, and the operating part 51 can be moved along a first horizontal direction ( Figure 1 The force-measuring piece 52 is reciprocatingly arranged on the second test frame 30 in the X direction in the horizontal direction. The force-measuring piece 52 is located between the operating portion 51 and the end of the simulated rotor 40 in the suspended state. The movable end of the operating portion 51 is connected to the first end of the force-measuring piece 52, and the second end of the force-measuring piece 52 is connected to the end of the simulated rotor 40 in the suspended state. The operating portion 51 is configured to push the force-measuring piece 52 to move on the first side of the first horizontal direction, and cooperate with the force-measuring piece 52 to push the simulated rotor 40 in the suspended state to move, so that the simulated rotor 40 in the suspended state moves axially. The force-measuring piece 52 is configured to detect the axial force of the simulated rotor 40 on the second side of the first horizontal direction when the simulated rotor 40 in the suspended state moves.

[0030] It can be seen that through the cooperation between the operating part 51 and the force measuring piece 52, the operating part 51 pushes the force measuring piece 52 to move on the first side of the first horizontal direction, and cooperates with the force measuring piece 52 to push the simulated rotor 40 in the suspended state to move, so that the simulated rotor 40 in the suspended state moves axially. When the simulated rotor 40 moves, the force measuring piece 52 detects the axial force of the simulated rotor 40 in the suspended state along the second side of the first horizontal direction, which greatly improves the test accuracy and has high test efficiency, meeting the fast-paced production requirements.

[0031] It should be noted that: in the initial state, the two ends of the simulated rotor 40 are respectively placed on two magnetic bearings 60 to be tested. At this time, the two magnetic bearings 60 to be tested are in a non-working state. The external power supply is energized to switch the two magnetic bearings 60 to be tested from the non-working state to the working state. The two ends of the simulated rotor 40 are in a suspended state. The simulated rotor 40 in the suspended state is pushed to move by adjusting the operating part 51. The direction of the axial force of the simulated rotor 40 in the suspended state is the second side of the first horizontal direction. When the simulated rotor 40 in the suspended state happens to move axially, the axial force of the simulated rotor 40 is equal to the driving force provided by the operating part 51 in magnitude and opposite in direction, which belongs to a pair of action and reaction forces. At this time, the force measuring piece 52 detects the magnitude of the axial force of the simulated rotor 40 in the suspended state. In addition, when the simulated rotor 40 in the suspended state moves axially, the simulated rotor 40 will also be subjected to radial force. This testing device mainly tests the axial force exerted on the magnetic bearing 60, so it is not considered.

[0032] As an embodiment, the first test frame 20 is fixedly disposed at the first end of the base 10, and the second test frame 30 can be disposed at the second end of the base 10 close to or away from the first test frame 20 along the first horizontal direction. By changing the spacing between the second test frame 30 and the first test frame 20, simulated rotors 40 of different specifications can be adapted.

[0033] It can be seen that by changing the distance between the second test frame 30 and the first test frame 20 , magnetic bearing 60 assemblies of different specifications can be tested, further improving the versatility of the test on the magnetic bearing 60 .

[0034] As an embodiment, the operating portion 51 includes two Figure 1 The threaded rod 510, two adjusting nuts 511 and an operating rod 512 are symmetrically arranged on the second test frame 30 (in the Y direction in the figure), wherein: the two threaded rods 510 extend along the first horizontal direction, each threaded rod 510 corresponds to an adjusting nut 511, each threaded rod 510 is provided with an external thread segment, and an internal thread hole is opened on the adjusting nut 511 corresponding to the external thread segment, and the two ends of the operating rod 512 are respectively movably sleeved on the two threaded rods 510, and the force measuring piece 52 includes a dynamometer 520. The first end rests against the middle of the operating rod 512, and the second end of the dynamometer 520 is connected to one end of the simulated rotor 40; by adjusting the two adjusting nuts 511 to move toward the first side of the first horizontal direction, the operating rod 512 pushes the dynamometer 520 to move, and the dynamometer 520 squeezes one end of the simulated rotor 40 in a suspended state, causing the simulated rotor 40 in a suspended state to move axially, and then cooperates with the dynamometer 520 to detect the axial force of the simulated rotor 40 in a suspended state along the second side of the first horizontal direction.

[0035] It can be seen that by adjusting the cooperation between the nut 511 and the threaded rod 510, a test structure with convenient operation and high precision is provided. At the same time, the axial force of the simulated rotor 40 is tested in conjunction with the dynamometer 520, and the value of the axial force can be directly read, and the test accuracy is high.

[0036] As an embodiment, the second test frame 30 is slidably disposed on the base 10 via a guide assembly 70 .

[0037] Of course, as another embodiment, the first test frame 20 can also be movably disposed on the base 10 via the guide assembly 70 .

[0038] As an embodiment, the guide assembly 70 includes two guide rails 71 and two sliders 72 laid at intervals on the base 10, each slider 72 is arranged corresponding to a guide rail 71, each guide rail 71 extends along a first horizontal direction, each slider 72 can be slidably set on the corresponding guide rail 71, the second test frame 30 is installed on the two sliders 72, and the second test frame 30 is slidably mounted on the base 10 through a sliding pair composed of the guide rail 71 and the slider 72. Obviously, the second test frame 30 is slidably mounted on the base 10 through a sliding pair composed of the guide rail 71 and the slider 72, and the movement stability is high.

[0039] As an embodiment, the magnetic bearing 60 provided on the first test frame 20 is detachably mounted on the first test frame 20 via a first disassembly component, and the magnetic bearing 60 provided on the second test frame 30 is detachably mounted on the second test frame 30 via a second disassembly component 80 .

[0040] As an embodiment, the first disassembly part adopts a plurality of first disassembly screws, and a first disassembly screw hole is opened on the first test frame 20 corresponding to each first disassembly screw, and a first through hole is opened in the circumference of the magnetic bearing 60 to cooperate with each first disassembly screw. The tail of each first disassembly screw passes through the corresponding first through hole of the magnetic bearing 60 and is locked in the corresponding first disassembly screw hole to fix the magnetic bearing 60 set on the first test frame 20 on the first test frame 20.

[0041] As an embodiment, the second disassembly component 80 uses a plurality of second disassembly screws 81, and a second disassembly screw hole is opened on the second test frame 30 corresponding to each second disassembly screw 81, and a second through hole 82 is opened in the circumference of the magnetic bearing 60 to cooperate with each second disassembly screw 81. The tail of each second disassembly screw 81 passes through the corresponding second through hole 82 of the magnetic bearing 60 and is locked in the corresponding second disassembly screw hole to fix the magnetic bearing 60 set on the second test frame 30 on the second test frame 30.

[0042] During the test of the axial force testing device of the above-mentioned magnetic levitation bearing: first, the two magnetic levitation bearings 60 are respectively installed at the corresponding heights of the first test frame 20 and the second test frame 30, and the distance between the second test frame 30 and the first test frame 20 is adjusted according to the specifications of the simulated rotor 40; then the power is turned on, and the two magnetic levitation bearings 60 to be tested are switched from the non-working state to the working state, so that the two ends of the simulated rotor 40 are in a suspended state; finally, the adjusting nuts 511 on both sides are manually operated to move along the first side of the first horizontal direction, so that the operating rod 512 pushes the dynamometer 520 to move, thereby driving the dynamometer 520 to squeeze one end of the simulated rotor 40 in the suspended state, and the simulated rotor 40 in the suspended state moves axially, and the dynamometer 520 detects the axial force of the simulated rotor 40 in the suspended state.

[0043] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic bearing axial force testing device, characterized in that: The axial force testing device of the magnetic bearing includes a base, a first test frame, a second test frame, a simulated rotor and a test component, wherein: The first test frame and the second test frame are arranged on the base at intervals, and the first test frame and the second test frame are both installed with magnetic bearings to be tested at the same height. The two ends of the simulated rotor are respectively passed through the two magnetic bearings to be tested. The magnetic bearings to be tested can be in a working state or a non-working state. When the two magnetic bearings to be tested are in the working state, the two ends of the simulated rotor are in a suspended state. The test component includes an operating portion and a force-measuring member, wherein the operating portion is reciprocally movable along a first horizontal direction on the second test frame, and the force-measuring member is located between the operating portion and an end portion of the simulated rotor in a suspended state, wherein a movable end of the operating portion is connected to a first end of the force-measuring member, and a second end of the force-measuring member is connected to an end portion of the simulated rotor in a suspended state; The operating part is configured to push the force measuring piece to move on the first side of the first horizontal direction, and cooperate with the force measuring piece to push the simulated rotor in the suspended state to move, so that the simulated rotor in the suspended state moves axially. The force measuring piece is configured to detect the axial force of the simulated rotor on the second side of the first horizontal direction when the simulated rotor in the suspended state moves.

2. The axial force testing device for a magnetic bearing according to claim 1, characterized in that: The first test frame is fixedly arranged at the first end of the base, and the second test frame can be arranged at the second end of the base along the first horizontal direction close to or away from the first test frame. By changing the distance between the second test frame and the first test frame, the simulated rotors of different specifications can be adapted.

3. The axial force testing device of a magnetic bearing according to claim 1, characterized in that: The operating portion includes two threaded rods symmetrically arranged on the second test frame along a second horizontal direction, two adjusting nuts and an operating rod, wherein: The two threaded rods extend along a first horizontal direction, each threaded rod corresponds to one adjusting nut, each threaded rod is provided with an external threaded section, and an internal threaded hole is provided on the adjusting nut corresponding to the external threaded section. The two ends of the operating rod are respectively movably mounted on the two threaded rods, and the force measuring member includes a force gauge, a first end of the force gauge abuts against the middle portion of the operating rod, and a second end of the force gauge is connected to one end of the simulated rotor; By adjusting the two adjusting nuts to move toward the first side of the first horizontal direction, the operating rod pushes the dynamometer to move, and the dynamometer squeezes one end of the simulated rotor in the suspended state, so that the simulated rotor in the suspended state moves axially, and then cooperates with the dynamometer to detect the axial force of the simulated rotor in the suspended state along the second side of the first horizontal direction.

4. The axial force testing device for a magnetic bearing according to claim 2, characterized in that: The second test frame is slidably arranged on the base through a guide assembly.

5. The axial force testing device for a magnetic bearing according to claim 4, characterized in that: The guide assembly includes two guide rails laid at intervals on the base and two sliders, each slider is arranged corresponding to one guide rail, each guide rail extends along a first horizontal direction, each slider is slidably arranged on the corresponding guide rail, the second test frame is installed on the two sliders, and the second test frame is slidably mounted on the base through a sliding pair composed of the guide rails and the sliders.

6. The axial force testing device for a magnetic bearing according to claim 1, characterized in that: The magnetic bearing provided on the first test frame is detachably mounted on the first test frame via a first detachable component, and the magnetic bearing provided on the second test frame is detachably mounted on the second test frame via a second detachable component.

7. The axial force testing device for a magnetic bearing according to claim 6, characterized in that: The first disassembly and assembly part uses a plurality of first disassembly and assembly screws, and a first disassembly and assembly screw hole is opened on the first test frame corresponding to each first disassembly and assembly screw, and a first through hole is opened in the circumference of the magnetic bearing to cooperate with each first disassembly and assembly screw. The tail of each first disassembly and assembly screw passes through the corresponding first through hole of the magnetic bearing and is locked in the corresponding first disassembly and assembly screw hole to fix the magnetic bearing set on the first test frame on the first test frame.

8. The axial force testing device for a magnetic bearing according to claim 6, characterized in that: The second disassembly and assembly part uses a plurality of second disassembly and assembly screws, and a second disassembly screw hole is opened on the second test frame corresponding to each second disassembly screw. A second through hole is opened in the circumference of the magnetic bearing to cooperate with each second disassembly screw. The tail of each second disassembly screw passes through the corresponding second through hole of the magnetic bearing and is locked in the corresponding second disassembly and assembly screw hole to fix the magnetic bearing set on the second test frame on the second test frame.

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