Dynamic detection device for stability of magnetic suspension bearing rotor

Abstract

The utility model discloses a magnetic suspension bearing rotor stability dynamic detection device, and belongs to the field of detection devices. A magnetic suspension bearing rotor stability dynamic detection device comprises a detection bench; the magnetic suspension bearing rotor stability dynamic detection device also comprises a driving member which is movably arranged on the detection bench; the magnetic suspension bearing is arranged on the detection table and located on one side of the driving part, and a first rotating shaft is inserted into the magnetic suspension bearing; the two magnetic couplings are mounted at the output end of the driving part and the first rotating shaft respectively; the sensor is arranged at an end cover of the magnetic suspension bearing; the magnetic coupling is located at one end of the first rotating shaft close to the driving part; and the two magnetic couplings attract each other. The dynamic detection device for the stability of the magnetic suspension bearing rotor has the beneficial effects that the actual working state of the magnetic suspension bearing can be simulated, and the stability of the magnetic suspension bearing rotor can be dynamically detected.

Description

Technical Field

[0001] The utility model relates to the field of detection devices, in particular to a dynamic detection device for the stability of a magnetic suspension bearing rotor. Background Art

[0002] Magnetic bearing is a new type of bearing that uses electromagnetic force to carry the rotor, avoiding mechanical contact of the bearing. Therefore, compared with traditional bearings, magnetic bearings have the advantages of no wear, no need for lubrication, low noise and long life. They are suitable for special environments such as ultra-high speed and vacuum.

[0003] The stable suspension of the rotor in the magnetic bearing is crucial to the normal operation of the magnetic bearing system. If the rotor position is offset, a violent collision will occur, causing immeasurable safety accidents and economic losses. Therefore, the production of magnetic bearings requires the detection of the control accuracy and stability of the rotor suspension, and then check whether the magnetic bearing system's stable control of the rotor is qualified.

[0004] At present, most of the detection devices in China are static suspension detection devices for magnetic bearings, which cannot truly simulate and detect the suspension conditions of the magnetic bearings when the rotor rotates under actual working conditions. Utility Model Content

[0005] The purpose of the utility model is to provide a dynamic detection device for the stability of a magnetic suspension bearing rotor. The utility model can realize the contactless driving of the permanent magnet synchronous motor to rotate the first rotating shaft through the combination of the driving member and the magnetic coupling, so as to simulate the actual working state of the magnetic suspension bearing and dynamically detect the stability of the magnetic suspension bearing rotor.

[0006] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0007] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a dynamic detection device for the stability of a magnetic bearing rotor, including:

[0008] Testing bench;

[0009] The magnetic bearing rotor stability dynamic detection device also includes:

[0010] A driving member, movably arranged on the testing table;

[0011] A magnetic suspension bearing is arranged on the detection platform and is located on one side of the driving member, and a first rotating shaft is inserted into the magnetic suspension bearing;

[0012] Two magnetic couplings are provided and are respectively mounted on the output end of the driving member and the first rotating shaft;

[0013] A sensor is arranged at the end cover of the magnetic bearing;

[0014] The magnetic coupling is located at one end of the first rotating shaft close to the driving member; the two magnetic couplings attract each other.

[0015] Furthermore, the magnetic bearing rotor stability dynamic detection device also includes:

[0016] A lifting platform is provided on the testing platform;

[0017] Wherein, the driving component is mounted on the lifting platform.

[0018] Furthermore, a transfer plate is provided between the lifting platform and the mounting frame;

[0019] Wherein, a plurality of through holes are provided on the adapter plate.

[0020] Furthermore, a mounting hole is provided on the mounting frame;

[0021] The mounting hole is constructed in a long strip shape and is located on both sides of the mounting frame; a second rotating shaft is provided on the output end of the driving member; the second rotating shaft is located on one end of the driving member close to the first rotating shaft; and the mounting hole extends along the axial direction of the second rotating shaft.

[0022] Furthermore, the through holes overlap with the mounting holes up and down; and the through holes are arranged along the length direction of the mounting holes.

[0023] Furthermore, the magnetic bearing rotor stability dynamic detection device also includes:

[0024] The counterweight group is arranged on one end of the first rotating shaft away from the driving member.

[0025] Furthermore, the balance group includes:

[0026] A connecting plate, disposed on an end of the first rotating shaft away from the driving member;

[0027] A counterweight block is arranged on the side wall of the connecting plate by bolts;

[0028] The connecting disk is coaxial with the second rotating shaft; a plurality of thread grooves with even intervals are formed on the side wall of the connecting disk.

[0029] Furthermore, a positioning groove is provided on the side wall of the connecting plate.

[0030] Furthermore, projections of the axis of the first rotating shaft and the axis of the second rotating shaft on the horizontal plane are located on the same straight line.

[0031] Furthermore, the driving element is a permanent magnet synchronous motor.

[0032] Compared with the prior art, the utility model has the following beneficial effects:

[0033] 1. Through the combination of the driving part and the magnetic coupling, the permanent magnet synchronous motor is used to drive the first shaft to rotate contactlessly, so as to simulate the actual working state of the magnetic bearing and dynamically detect the stability of the magnetic bearing rotor.

[0034] 2. By setting the lifting platform, perforations and mounting holes, the height of the second rotating shaft can be adjusted, and the spacing between the magnetic couplings on the first rotating shaft and the second rotating shaft can be adjusted, so that the dynamic detection device for the stability of the magnetic bearing rotor can be suitable for the detection height requirements of different types of magnetic bearings.

[0035] 3. By installing a counterweight at the end of the first rotating shaft, the radial imbalance of the first rotating shaft is achieved, thereby simulating the working condition of the rotor in the magnetic bearing being subjected to radial disturbance, so as to better detect the accuracy and stability of the magnetic bearing control. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0037] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0038] In the attached picture:

[0039] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0040] Figure 2 It is a structural schematic diagram of a part of the embodiment, mainly showing the mounting frame structure;

[0041] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the balancing group.

[0042] Reference numerals:

[0043] 100. Dynamic detection device for magnetic bearing rotor stability;

[0044] 101. Testing table;

[0045] 102. Driving member;

[0046] 103. Magnetic bearing;

[0047] 104. first rotating shaft;

[0048] 105. second rotating shaft;

[0049] 106. Magnetic coupling;

[0050] 107. Lifting platform;

[0051] 108, mounting frame; 108a, mounting hole;

[0052] 109, adapter plate; 109a, perforation;

[0053] 110, counterweight group; 110a, connecting plate; 110b, counterweight block; 110c, thread groove; 110d, positioning groove;

[0054] 111. Sensor. DETAILED DESCRIPTION

[0055] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0056] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0057] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0058] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0059] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0060] Reference Figure 1-3A dynamic detection device 100 for the stability of a magnetic suspension bearing rotor comprises: a detection platform 101, a driving member 102, a magnetic suspension bearing 103, a first rotating shaft 104, a second rotating shaft 105, a magnetic coupling 106, and a sensor 111; the driving member 102 is a permanent magnet synchronous motor, and the driving member 102 is movably arranged on the detection platform 101; the magnetic suspension bearing 103 is fixed on the detection platform 101 and is located on one side of the driving member 102; the first rotating shaft 104 is inserted into the magnetic suspension bearing 103; the second rotating shaft 105 is fixed on the output end of the driving member 102 The output end of the driving member 102 faces one end of the magnetic bearing 103, and the projection of the axis of the second rotating shaft 105 and the axis of the first rotating shaft 104 on the horizontal plane are located on the same straight line; the magnetic coupling 106 has a pair, which is respectively arranged on one end of the first rotating shaft 104 close to the second rotating shaft 105 and on one end of the second rotating shaft 105 close to the first rotating shaft 104; the sensor 111 is an eddy current displacement sensor, which is fixed on the end cover of the magnetic bearing 103 and has a pair, which are respectively used to detect the up and down and left and right radial runout of the first rotating shaft 104.

[0061] Through the combination of the driving member 102 and the magnetic coupling 106 , the permanent magnet synchronous motor drives the first rotating shaft 104 to rotate contactlessly, so as to simulate the actual working state of the magnetic suspension bearing 103 and dynamically detect the rotor stability of the magnetic suspension bearing 103 .

[0062] A lifting platform 107 is fixed on the detection table 101, and the driving member 102 is arranged on the lifting platform 107 through a mounting frame 108 and an adapter plate 109; the mounting frame 108 is fixed on the driving member 102, and mounting holes 108a are opened on both sides of the bottom plate of the mounting frame 108, and the mounting holes 108a are in the shape of long strips, and the mounting holes 108a extend along the axial direction of the second rotating shaft 105, and a plurality of through holes 109a are opened on the adapter plate 109, and some of the through holes 109a overlap with the mounting holes 108a up and down, and the through holes 109a are located on both sides of the adapter plate 109, and the through holes 109a are arranged along the length direction of the mounting holes 108a, and the mounting frame 108 and the adapter plate 109 are fixed together by bolts and nuts.

[0063] The height of the second rotating shaft 105 can be adjusted by the lifting platform 107, and the distance between the magnetic coupling 106 on the first rotating shaft 104 and the second rotating shaft 105 can be adjusted by the arrangement of the through holes 109a and the long strip-shaped mounting holes 108a arranged on the adapter plate 109, so that the dynamic detection device 100 for the stability of the magnetic suspension bearing rotor can be suitable for the detection height requirements of different types of magnetic suspension bearings 103.

[0064] A counterweight group 110 is provided at one end of the first rotating shaft 104 away from the second rotating shaft 105, and the counterweight group 110 includes: a connecting disk 110a and a counterweight block 110b; the connecting disk 110a is generally disc-shaped, and the connecting disk 110a is coaxial with the first rotating shaft 104. Four symmetrically distributed thread grooves 110c are provided on the side wall of the connecting disk 110a, and a positioning groove 110d for positioning the counterweight block 110b is also provided at the notch of the thread groove 110c; the center of the counterweight block 110b has a through hole for the bolt to pass through, and the bolt passes through the through hole and is threadedly connected to the thread groove 110c, thereby fixing the counterweight block 110b to the side wall of the connecting disk 110a.

[0065] By installing a counterweight 110b at the end of the first shaft 104, the first shaft 104 is unbalanced in radial direction to simulate the working condition of the rotor in the magnetic bearing 103 being subjected to radial disturbance, so as to better detect the control accuracy and stability of the magnetic bearing 103.

[0066] The operation process is as follows: before testing the magnetic bearing 103, the tester first installs the magnetic bearing 103 and the lifting platform 107 on the testing platform 101, then installs the first rotating shaft 104 into the magnetic bearing 103, installs the adapter plate 109 on the lifting platform 107, then places the driver 102 mounting frame 108 on the adapter plate 109, and then installs the driver 102 on the motor mounting frame 108, and then respectively installs the two magnetic couplings 106 on one end of the second rotating shaft 105 close to the first rotating shaft 104 and one end of the first rotating shaft 104 close to the second rotating shaft 105, and then adjusts the height of the lifting platform 107 to align the center of the second rotating shaft 105 The center of the first rotating shaft 104 is then moved left and right to keep the spacing between the two magnetic couplings 106 between 0 and 1 mm. After adjusting the spacing, the mounting frame 108 is fixed to the adapter plate 109 with bolts and nuts through the adapter plate 109. Then, the driving member 102 is turned on to perform a dynamic test of the stability of the rotor of the magnetic suspension bearing 103 when it is not disturbed. Then, the power is disconnected, and counterweights 110b of different masses are installed in the four symmetrically distributed counterweight 110b positioning grooves 110d of the connecting plate 110a with bolts. Then, the power is turned on again to perform a dynamic suspension stability test of the rotor of the magnetic suspension bearing 103 when it is subjected to different degrees of radial disturbance.

[0067] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A dynamic detection device for the stability of a magnetic bearing rotor, comprising: Testing station (101); Features: The magnetic bearing rotor stability dynamic detection device also includes: A driving member (102) movably disposed on the detection platform (101); A magnetic suspension bearing (103) is arranged on the detection platform (101) and is located on one side of the driving member (102); a first rotating shaft (104) is inserted into the magnetic suspension bearing (103); Two magnetic couplings (106) are provided and are respectively mounted on the output end of the driving member (102) and the first rotating shaft (104); A sensor (111) is arranged at an end cover of the magnetic suspension bearing (103); The magnetic coupling (106) is located at one end of the first rotating shaft (104) close to the driving member (102); the two magnetic couplings (106) attract each other.

2. The magnetic bearing rotor stability dynamic detection device according to claim 1 is characterized in that: The magnetic bearing rotor stability dynamic detection device also includes: A lifting platform (107) is arranged on the detection platform (101); Wherein, the driving member (102) is arranged on the lifting platform (107) via a mounting frame (108).

3. The magnetic bearing rotor stability dynamic detection device according to claim 2 is characterized in that: An adapter plate (109) is provided between the lifting platform (107) and the mounting frame (108); Wherein, the adapter plate (109) is provided with a plurality of through holes (109a).

4. The magnetic bearing rotor stability dynamic detection device according to claim 3 is characterized in that: The mounting frame (108) is provided with a mounting hole (108a); The mounting hole (108a) is constructed in the shape of an elongated strip and is located on both sides of the mounting frame (108); a second rotating shaft (105) is provided on the output end of the driving member (102); the second rotating shaft (105) is located on one end of the driving member (102) close to the first rotating shaft (104); and the mounting hole (108a) extends along the axial direction of the second rotating shaft (105).

5. The magnetic bearing rotor stability dynamic detection device according to claim 4 is characterized in that: The through holes (109a) overlap with the mounting holes (108a) up and down; the through holes (109a) are arranged along the length direction of the mounting holes (108a).

6. The magnetic bearing rotor stability dynamic detection device according to claim 4 is characterized in that: The magnetic bearing rotor stability dynamic detection device also includes: The counterweight group (110) is arranged on an end of the first rotating shaft (104) away from the driving member (102).

7. The magnetic bearing rotor stability dynamic detection device according to claim 6 is characterized in that: The matching group (110) comprises: A connecting disk (110a) is disposed on an end of the first rotating shaft (104) away from the driving member (102); A counterweight block (110b) is mounted on the side wall of the connecting plate (110a) by means of bolts; The connecting disk (110a) is coaxial with the second rotating shaft (105); and a plurality of evenly spaced thread grooves (110c) are formed on the side wall of the connecting disk (110a).

8. The magnetic bearing rotor stability dynamic detection device according to claim 7 is characterized in that: The side wall of the connection plate (110a) is provided with a positioning groove (110d).

9. The magnetic bearing rotor stability dynamic detection device according to claim 4 is characterized in that: The projections of the axis of the first rotating shaft (104) and the axis of the second rotating shaft (105) on a horizontal plane are located on the same straight line.

10. The magnetic bearing rotor stability dynamic detection device according to claim 1 is characterized in that: The driving component (102) is a permanent magnet synchronous motor.

Images