CN210981780U - Axial magnetic bearing rigidity testing device - Google Patents
Axial magnetic bearing rigidity testing device Download PDFInfo
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- CN210981780U CN210981780U CN201921827108.2U CN201921827108U CN210981780U CN 210981780 U CN210981780 U CN 210981780U CN 201921827108 U CN201921827108 U CN 201921827108U CN 210981780 U CN210981780 U CN 210981780U
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- axial magnetic
- magnetic bearing
- thrust disc
- disc
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Abstract
The utility model relates to a magnetic suspension bearing technical field provides an axial magnetic bearing rigidity testing arrangement, and this testing arrangement is including the bearing fixing device who is used for arranging the axial magnetic bearing that awaits measuring, the axial magnetic bearing that awaits measuring is arranged in on the bearing fixing device, still including the thrust disc fixing device who is used for arranging the thrust disc, thrust disc fixing device with be connected force sensor between the thrust disc, force sensor with effort direction between the thrust disc is in on the vertical direction. This application adopts thrust dish fixing device and force sensor to realize the fixed of thrust dish and the ascending displacement adjustment of vertical side, and thrust dish and force sensor only receive the effort in vertical side, and the effort that produces the thrust dish when can accurately gather solenoid and let in the electric current through force sensor, and the effort of wherein gathering can not receive the influence of any frictional force, can accurately calculate the current rigidity and the displacement rigidity who reachs the axial magnetic bearing that awaits measuring according to the effort.
Description
Technical Field
The utility model belongs to the technical field of the magnetic suspension bearing, in particular to axial magnetic bearing rigidity testing arrangement.
Background
Small motors are the most common form of converting electrical energy into mechanical energy and have wide application in the household and industrial fields. The traditional motor mainly comprises a motor stator part, a motor thrust disc part, a thrust disc supporting bearing and a machine shell part, wherein the motor stator part and the motor thrust disc part are connected through a mechanical bearing or are in mechanical contact, so that mechanical friction exists in the motion process of the electronic thrust disc. Mechanical friction can reduce the rotational speed of thrust dish to a certain extent, and mechanical friction can produce noise, wearing and tearing component simultaneously, produces the heat and causes other negative problems, finally shortens motor life, consequently, does not have the oil and must adopt non-contact support mode, the magnetic suspension support mode promptly in the motor in order to realize the operation of super high rotational speed and the long-life of equipment, clean.
An axial magnetic bearing is adopted in the magnetic suspension motor to complete the axial limit of a thrust disc, and the rigidity of the axial magnetic bearing is an important design parameter and determines a plurality of control parameters of the axial magnetic bearing. The existing test scheme is as follows: the axial magnetic bearing is arranged in the whole machine for measurement, but before the whole machine is assembled, whether the rigidity of the axial magnetic bearing is qualified or not cannot be known, if the rigidity of the axial magnetic bearing is unqualified, the axial magnetic bearing needs to be disassembled from the whole machine, the mechanical precision can be reduced when the axial magnetic bearing is disassembled every time, and the time for disassembling and assembling is long.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an axial magnetic bearing rigidity testing arrangement ensures the quick accurate rigidity parameter who measures axial magnetic bearing of ability.
In order to achieve the purpose, the utility model adopts the following technical scheme: the axial magnetic bearing rigidity testing device comprises a bearing fixing device used for arranging an axial magnetic bearing to be tested, a thrust disc fixing device used for arranging a thrust disc, wherein a force sensor is connected between the thrust disc fixing device and the thrust disc, and the acting force direction between the force sensor and the thrust disc is in the vertical direction.
Optionally, the bearing fixing device includes a fixed disc, the axial magnetic bearing to be measured is horizontally disposed on the fixed disc, and a locking device for fixing the thrust disc is disposed on the fixed disc.
Optionally, a plurality of grooves are uniformly formed in the fixed disc, the length direction of each groove is in the radial direction of the fixed disc, the locking device includes a fixture block slidably connected to the groove, the fixture block protrudes from the surface of the fixed disc, and the axial magnetic bearing to be measured is arranged between the fixture blocks.
Optionally, the cross-sectional shape of the groove is in a shape of a Chinese character 'tu', and the cross-sectional shape of the lower portion of the corresponding fixture block is also in a shape of a Chinese character 'tu' matched with the groove.
Optionally, the periphery of the fixed disk is coaxially provided with a support ring, the support ring is connected with a radial strip between the fixed disks, the support ring is provided with a plurality of screws which are located on the radial direction of the fixed disks, and the screws abut against the fixture blocks.
Optionally, the thrust disc fixing device comprises a gantry arranged on the fixed disc, and the force sensor is connected with the top of the gantry.
Optionally, a slide rail is arranged at the top of the door frame in a downward extending manner, a slide block is connected to the slide rail in a sliding manner, and the force sensor is connected to the slide block.
Optionally, a screw rod driving device is arranged on the sliding rail, the screw rod driving device includes a vertically arranged screw rod, and the screw rod is connected with the sliding block.
Optionally, the device further comprises a displacement sensor for detecting the change of the displacement of the thrust disc in the vertical direction.
Optionally, the displacement sensor is disposed on the fixed disk, and the displacement sensor is located below the thrust disk.
Compared with the prior art, the thrust disc fixing device and the force sensor are adopted to realize the fixation of the thrust disc and the displacement adjustment in the vertical direction, the thrust disc and the force sensor are stressed in the vertical direction only, the acting force generated on the thrust disc when the electromagnetic coil is electrified can be accurately collected through the force sensor, the collected acting force cannot be influenced by any friction force, and the current rigidity and the displacement rigidity of the axial magnetic bearing to be measured can be accurately calculated according to the acting force.
Drawings
Fig. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of the bearing retainer device without the support ring;
FIG. 3 is a front view of the bearing retainer device, shown without the support ring;
fig. 4 is a top view of the bearing retainer.
Reference numerals:
1. an axial magnetic bearing to be tested; 2. a bearing fixing device; 21. fixing the disc; 22. a groove; 23. a clamping block; 24. a support ring; 25. a radial strip; 26. a screw; 3. a thrust disc; 4. a thrust disc fixing device; 41. a gantry; 42. a slide rail; 43. a slider; 44. a screw driving device; 45. a screw rod; 5. a force sensor; 6. and a displacement sensor.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are some, but not all embodiments of the invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
As shown in fig. 1, the utility model provides an axial magnetic bearing rigidity testing arrangement, including the bearing fixing device 2 that is used for arranging the axial magnetic bearing 1 that awaits measuring, on bearing fixing device 2 was arranged in to the axial magnetic bearing 1 that awaits measuring, be connected with force sensor 5 between thrust disc fixing device 4 and the thrust disc 3, the effort direction between force sensor 5 and the thrust disc 3 was in the vertical direction, made thrust disc 3 and the axial magnetic bearing 1 that awaits measuring parallel relatively and coaxial arrangement through bearing fixing device 2 and thrust disc fixing device 4;
when measuring the current rigidity, different currents I are introduced into the axial magnetic bearing 1 to be measured, and each output value F measured by the force sensor 5 at the moment is correspondingly recordedICurrent stiffness KI＝FII; then, the thrust disc 3 is adjusted to move up or down, and the current rigidity of the axial magnetic bearing 1 to be measured under different displacements is recorded; then fitting the current rigidity of each group;
when measuring the displacement rigidity, constant current is introduced into the axial magnetic bearing 1 to be measured, the thrust disc 3 is enabled to approach or be far away from the axial magnetic bearing 1 to be measured to record the displacement S through the thrust disc fixing device 4 in the vertical direction, and each output value F measured by the force sensor 5 at the moment is correspondingly recordedSD.displacement stiffness KS＝FS(ii) S; then changing the introduced current, and recording the displacement rigidity of the axial magnetic bearing 1 to be tested under different currents; then fitting each group of displacement stiffness;
compared with the prior art, the thrust disc fixing device 4 and the force sensor 5 are adopted to realize the fixing of the thrust disc 3 and the displacement adjustment in the vertical direction, the thrust disc 3 and the force sensor 5 are stressed in the vertical direction only, the acting force generated on the thrust disc 3 when the electromagnetic coil is electrified can be accurately collected through the force sensor 5, the collected acting force cannot be influenced by any friction force, and the current rigidity and the displacement rigidity of the axial magnetic bearing 1 to be measured can be accurately calculated according to the acting force.
In some embodiments, as shown in fig. 2, the bearing fixture 2 comprises a fixed disc 21, and the axial magnetic bearing 1 to be tested is coaxially fixed with the fixed disc 21 by using a locking device.
In some embodiments, as shown in fig. 2, the fixed disk 21 is uniformly provided with grooves 22, the length direction of the grooves 22 is in the radial direction of the fixed disk 21, the grooves 22 are slidably connected with fixture blocks 23, the fixture blocks 23 protrude from the surface of the fixed disk 21, the axial magnetic bearing 1 to be measured is arranged among the fixture blocks 23, and the fixture blocks 23 are used as locking devices to tightly fix the axial magnetic bearing 1 to be measured, so that the axial magnetic bearing 1 to be measured and the fixed disk 21 are arranged concentrically; in addition, the axial magnetic bearing 1 to be tested with different sizes can be loaded in the form that the fixture block 23 is matched with the groove 22, and the test is convenient. Certainly, the axial magnetic bearing 1 to be measured can be fixed in other forms in the present application, and most conventionally, the axial magnetic bearing 1 to be measured is fixed on the fixed disc 21 by using the auxiliary connecting piece and the bolt, but the method is complex, the axial magnetic bearing 1 to be measured cannot be rapidly disassembled, and the rapid disassembly, assembly and replacement of the axial magnetic bearings 1 to be measured with different sizes cannot be conveniently realized.
In some embodiments, as shown in fig. 2 and 3, the cross-sectional shape of the groove 22 is a "convex" shape, and the cross-sectional shape of the lower portion of the corresponding latch 23 is a "convex" shape matching the groove 22. When current is introduced, the axial magnetic bearing 1 to be tested generates suction to the thrust disc 3, the axial magnetic bearing 1 to be tested is possibly unstable under the influence of the suction, the fixture block 23 is firstly ensured to be stable by the fixture block 23 and the groove 22 in a limiting matching mode, and the axial magnetic bearing 1 to be tested can be further locked.
In some embodiments, as shown in fig. 4, the fixture block 23 protrudes relative to the groove 22, the inner end of the fixture block 23 abuts against the outer circumferential surface of the axial magnetic bearing 1 to be tested, the outer circumference of the fixed disk 21 is provided with the support ring 24, the support ring 24 is connected with the screw 26 along the radial direction, the screw 26 abuts against the outer end of the fixture block 23, so as to tightly lock the axial magnetic bearing 1 to be tested, the axial magnetic bearing 1 to be tested with different sizes can be correspondingly fixed by rotating the screw 26 and sliding the fixture block 23, and the applicability of the testing device of the present application is improved.
In some embodiments, as shown in fig. 1, the thrust disk fixing device 4 includes a gantry 41 disposed on the fixed disk 21, the gantry 41 is disposed integrally with the fixed disk 21, the force sensor 6 is directly suspended on the top of the gantry 41, and the force sensor 5 is vertically connected to the center of the thrust disk 3, and simultaneously, the center of the thrust disk 3 is aligned with the center of the axial magnetic bearing 1 to be measured on the fixed disk 21.
In some embodiments, as shown in fig. 1, a slide rail 42 extends downward from the top of the gantry 41, a slide block 43 is slidably connected to the slide rail 42, and the force sensor 5 is connected to the slide block 43; the displacement adjustment of the thrust disc 3 in the vertical direction is quickly realized through the sliding fit of the slide rail 42 and the slide block 43.
In some embodiments, as shown in fig. 1, a lead screw driving device 44 is disposed on the slide rail 42, the lead screw driving device 44 includes a lead screw 45 disposed vertically, and other linear displacement driving devices can be used to drive the slide block 43 to move, so as to adjust the position of the thrust disc 3 in the vertical direction.
In some embodiments, as shown in fig. 1, a displacement sensor 6 for detecting a displacement change of the thrust disc 3 in the vertical direction is further included, the displacement sensor 6 is disposed on the upper surface of the fixed disc 21, and the displacement sensor 6 is located below the thrust disc 3. When the thrust disc 3 moves in the vertical direction relative to the slide rail 42, the displacement sensor 6 records the displacement change at the moment, so that the rigidity parameter can be calculated accurately.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The axial magnetic bearing rigidity testing device is characterized in that: the device comprises a bearing fixing device (2) used for arranging an axial magnetic bearing (1) to be tested, wherein the axial magnetic bearing (1) to be tested is horizontally arranged on the bearing fixing device (2), the device also comprises a thrust disc fixing device (4) used for arranging a thrust disc (3), a force sensor (5) is connected between the thrust disc fixing device (4) and the thrust disc (3), and the acting force direction between the force sensor (5) and the thrust disc (3) is in the vertical direction.
2. The axial magnetic bearing stiffness testing device of claim 1, wherein: the bearing fixing device (2) comprises a fixed disc (21), the axial magnetic bearing (1) to be tested is horizontally arranged on the fixed disc (21), and a locking device used for fixing the thrust disc (3) is arranged on the fixed disc (21).
3. The axial magnetic bearing stiffness testing apparatus of claim 2, wherein: the locking device comprises a locking device and is characterized in that a plurality of grooves (22) are uniformly formed in the fixed disc (21), the length directions of the grooves (22) are located in the radial direction of the fixed disc (21), the locking device comprises a clamping block (23) in sliding connection with the grooves (22), the surface of the clamping block (23) protrudes relative to the surface of the fixed disc (21), and the axial magnetic bearing (1) to be tested is arranged among the clamping blocks (23).
4. The axial magnetic bearing stiffness testing device of claim 3, wherein: the cross section of the groove (22) is in a convex shape, and the cross section of the lower part of the corresponding clamping block (23) is in a convex shape matched with the groove (22).
5. The axial magnetic bearing stiffness testing device of claim 3, wherein: the periphery of fixed disc (21) has arranged support ring (24) coaxially, support ring (24) with be connected with between fixed disc (21) radial strip (25), be provided with a plurality of being in on support ring (24) fixed disc (21) radial ascending screw rod (26), screw rod (26) contradict to on fixture block (23).
6. The axial magnetic bearing stiffness testing apparatus of claim 2, wherein: the thrust disc fixing device (4) comprises a gantry (41) arranged on the fixed disc (21), and the force sensor (5) is connected with the top of the gantry (41).
7. The axial magnetic bearing stiffness testing device of claim 6, wherein: the top downwardly extending of portal (41) has arranged slide rail (42), sliding connection has slider (43) on slide rail (42), force sensor (5) with slider (43) are connected.
8. The axial magnetic bearing stiffness testing device of claim 7, wherein: and a screw rod driving device (44) is arranged on the sliding rail (42), the screw rod driving device (44) comprises a screw rod (45) which is vertically arranged, and the screw rod (45) is connected with the sliding block (43).
9. The axial magnetic bearing stiffness testing apparatus of claim 2, wherein: the device also comprises a displacement sensor (6) for detecting the displacement change of the thrust disc (3) in the vertical direction.
10. The axial magnetic bearing stiffness testing device of claim 9, wherein: the displacement sensor (6) is arranged on the fixed disc (21), and the displacement sensor (6) is located below the thrust disc (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921827108.2U CN210981780U (en) | 2019-10-28 | 2019-10-28 | Axial magnetic bearing rigidity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921827108.2U CN210981780U (en) | 2019-10-28 | 2019-10-28 | Axial magnetic bearing rigidity testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210981780U true CN210981780U (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921827108.2U Expired - Fee Related CN210981780U (en) | 2019-10-28 | 2019-10-28 | Axial magnetic bearing rigidity testing device |
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| Country | Link |
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| CN (1) | CN210981780U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595776A (en) * | 2019-10-28 | 2019-12-20 | 北京昆腾迈格技术有限公司 | Axial magnetic bearing rigidity testing device |
-
2019
- 2019-10-28 CN CN201921827108.2U patent/CN210981780U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595776A (en) * | 2019-10-28 | 2019-12-20 | 北京昆腾迈格技术有限公司 | Axial magnetic bearing rigidity testing device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200710 Termination date: 20201028 |