A magnetic bearing

Abstract

The present invention discloses a magnetic suspension bearing, which relates to the field of magnetic suspension bearings, including a bearing cover, the inner wall of the bearing cover is fixed with a sleeve, and the inner side of the bearing cover is clamped with an inspection structure, the outer wall of the bearing cover is provided with a strong magnetic structure, and the inner wall of the bearing cover is fixed with an iron core, and the iron core is provided with a winding. The present invention provides an annular permanent magnet sheet, an outer clamping block, an inner clamping block and a clamping groove. When the magnetic suspension bearing is in use, if a problem occurs and needs to be repaired, the bolts on the fixing frame are screwed, and after the bolts are screwed off, the annular permanent magnet sheet is pulled to rotate to the left through the push-pull groove. When rotating, the outer clamping block on the outer wall of the annular permanent magnet sheet and the inner clamping block on the inner wall are also rotated to the left and pulled out from the clamping groove. After being pulled out, the annular permanent magnet sheet is pulled up, and the outer clamping block and the inner clamping block are pulled out from the insertion groove on the top of the bearing cover and the sleeve, so that the outer clamping block is separated from the bearing cover, and the winding and other components can be inspected.

Description

Technical Field

[0001] The invention relates to the field of magnetic suspension bearings, in particular to a magnetic suspension bearing. Background Art

[0002] The magnetic levitation shaft uses magnetic force to suspend the rotor in the air, so that there is no mechanical contact between the rotor and the stator. The principle is that the magnetic induction line is perpendicular to the magnetic levitation line, and the shaft core is parallel to the magnetic levitation line, so the weight of the rotor is fixed on the running track, and the shaft core with almost no load is used to push in the direction opposite to the magnetic levitation line, so that the entire rotor is suspended in the air on a fixed running track.

[0003] The outer shell of the existing magnetic bearing is generally an integrated structure, which is inconvenient to open, making it difficult to repair the winding and other components inside the bearing when problems occur. Therefore, a magnetic bearing is urgently needed. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetic bearing to solve the problem that the outer shell of the existing magnetic bearing is generally an integrated structure, which is inconvenient to open, making it inconvenient to repair when problems occur with the windings and other components inside the bearing; and once the magnetic bearing is produced, the size of its magnetic force is fixed. If the magnetic force of the bearing is insufficient during use, the bearing can only be replaced and cannot be adjusted.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a magnetic levitation bearing, comprising a bearing cover, the inner wall of which is fixed with a shaft sleeve, and the inner side of the bearing cover is engaged with a maintenance structure, the outer wall of the bearing cover is provided with a strong magnetic structure, and the inner wall of the bearing cover is fixed with an iron core, and the iron core is provided with a winding.

[0006] The maintenance structure includes an annular permanent magnet sheet, the outer wall of the annular permanent magnet sheet is provided with an outer snap-fit ​​block, and the inner wall of the annular permanent magnet sheet is provided with an inner snap-fit ​​block, the top of the bearing cover is provided with an insertion groove, one side of the insertion groove is provided with a snap-fit ​​groove, the surface of the annular permanent magnet sheet is provided with a push-pull groove, and a fixing frame is provided on the annular permanent magnet sheet.

[0007] The strong magnetic structure comprises a strengthening groove, a mounting sleeve is movably arranged inside the strengthening groove, a hexagonal groove is opened inside the mounting sleeve, an insulating rod is arranged at the end of the mounting sleeve, and a permanent magnet is arranged at the front end of the insulating rod.

[0008] Preferably, an insertion groove is provided on the top of the bearing cover and the top of the shaft sleeve, and a locking groove is provided on one side of the insertion groove.

[0009] Preferably, the annular permanent magnet sheet is connected to the bearing cover and the shaft sleeve by means of an outer snap-fit ​​block, an inner snap-fit ​​block, an insertion groove and a snap-fit ​​groove.

[0010] Preferably, the outer engaging block and the inner engaging block are movably engaged with the insertion slot and the engaging slot.

[0011] Preferably, the annular permanent magnet sheet is fixedly connected to the bearing cover via a fixing frame and bolts.

[0012] Preferably, the winding is wound around an iron core, and the reinforcement slot penetrates to the inner side of the iron core.

[0013] Preferably, the installation sleeve is movably connected to the reinforcement groove via a thread, and the hexagonal groove is through-connected to the insulating rod.

[0014] Preferably, the permanent magnet and the iron core are fixedly mounted via an insulating rod and a mounting sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] First, the present invention provides an annular permanent magnet sheet, an outer snap-fit ​​block, an inner snap-fit ​​block and a snap-fit ​​groove. When the magnetic suspension bearing is in use, if a problem occurs and maintenance is required, the bolts on the fixing frame are screwed. After the bolts are screwed down, the annular permanent magnet sheet is pulled to rotate to the left through the push-pull groove. During the rotation, the outer snap-fit ​​block on the outer wall of the annular permanent magnet sheet and the inner snap-fit ​​block on the inner wall are also rotated to the left and pulled out from the snap-fit ​​groove. After being pulled out, the annular permanent magnet sheet is pulled up, and the outer snap-fit ​​block and the inner snap-fit ​​block are pulled out from the insertion grooves on the top of the bearing cover and the shaft sleeve, so that the outer snap-fit ​​block is separated from the bearing cover, and the winding and other components can be repaired.

[0017] Second, the present invention provides an installation sleeve, a permanent magnet, an insulating rod and a strengthening groove. When the magnetic force of the magnetic suspension bearing is weakened, the permanent magnet and the insulating rod at its end are inserted into the bearing cover and the strengthening groove inside the iron core, and the installation sleeve at the rear end of the insulating rod is movably connected to the strengthening groove through a thread. At this time, the hexagonal wrench is inserted into the hexagonal groove inside the installation sleeve, so that when the wrench is rotated, it is engaged with the hexagonal groove to drive the installation sleeve to rotate in the strengthening groove for fixing. After fixing, the insulating rod and the permanent magnet are located on the inner side of the iron core, so that the permanent magnet increases the magnetic field strength of the winding, thereby enhancing the magnetic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 A schematic diagram of a winding of the present invention;

[0020] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the annular permanent magnet sheet of the present invention;

[0022] Figure 5 It is a schematic diagram of the engaging groove of the present invention;

[0023] Figure 6 It is a schematic diagram of the insertion slot of the present invention;

[0024] Figure 7 It is a schematic diagram of the iron core of the present invention;

[0025] Figure 8 It is a schematic diagram of the strong magnetic structure of the present invention;

[0026] Fig. 9 It is a schematic diagram of a hexagonal slot of the present invention.

[0027] In the figure: 1. bearing cover; 2. shaft sleeve; 3. maintenance structure; 301. annular permanent magnet piece; 302. outer snap-fit ​​block; 303. inner snap-fit ​​block; 304. insertion slot; 305. snap-fit ​​slot; 306. push-pull slot; 307. fixing frame; 4. iron core; 5. winding; 6. strong magnetic structure; 601. strengthening slot; 602. permanent magnet; 603. insulating rod; 604. mounting sleeve; 605. hexagonal slot. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-6A magnetic suspension bearing comprises a bearing cover 1, a shaft sleeve 2 is fixed to the inner wall of the bearing cover 1, and a maintenance structure 3 is engaged with the inner side of the bearing cover 1, a strong magnetic structure 6 is arranged on the outer wall of the bearing cover 1, and an iron core 4 is fixed to the inner wall of the bearing cover 1, and a winding 5 is arranged on the iron core 4, the maintenance structure 3 comprises an annular permanent magnet sheet 301, an outer clamping block 302 is arranged on the outer wall of the annular permanent magnet sheet 301, and an inner clamping block 303 is arranged on the inner wall of the annular permanent magnet sheet 301 The top of the bearing cover 1 is provided with an insertion groove 304, and a snap-fit ​​groove 305 is provided on one side of the insertion groove 304. A push-pull groove 306 is provided on the surface of the annular permanent magnet piece 301, and a fixing frame 307 is provided on the annular permanent magnet piece 301. The top of the bearing cover 1 and the top of the shaft sleeve 2 are both provided with an insertion groove 304, and a snap-fit ​​groove 305 is provided on one side of the insertion groove 304. The annular permanent magnet piece 301 and the bearing cover 1 and the shaft sleeve 2 are connected by an external snap-fit ​​block 306. 2. The inner snap-fit ​​block 303, the insertion slot 304 and the snap-fit ​​slot 305 are snap-fitted and connected, the outer snap-fit ​​block 302, the inner snap-fit ​​block 303, the insertion slot 304 and the snap-fit ​​slot 305 are snap-fitted and connected, the annular permanent magnet piece 301 is fixedly connected to the bearing cover 1 through the fixing frame 307 and bolts. When the magnetic suspension bearing is in use, if there is a problem and it needs to be repaired, the bolts on the fixing frame 307 are screwed down. After the bolts are screwed down, the annular permanent magnet piece is pulled through the push-pull slot 306. The magnetic sheet 301 rotates to the left, and during the rotation, the outer snap-fit ​​block 302 on the outer wall and the inner snap-fit ​​block 303 on the inner wall of the annular permanent magnetic sheet 301 also rotate to the left and are pulled out from the snap-fit ​​groove 305. After being pulled out, the annular permanent magnetic sheet 301 is pulled upward, and the outer snap-fit ​​block 302 and the inner snap-fit ​​block 303 are pulled out from the insertion groove 304 at the top of the bearing cover 1 and the shaft sleeve 2, thereby separating the outer snap-fit ​​block 302 from the bearing cover 1, and the winding 5 and other components can be inspected and repaired.

[0030] See also Figure 7-9A magnetic suspension bearing, wherein the strong magnetic structure 6 comprises a strengthening groove 601, a mounting sleeve 604 is movably provided on the inner side of the strengthening groove 601, a hexagonal groove 605 is provided on the inner side of the mounting sleeve 604, and an insulating rod 603 is provided on the end of the mounting sleeve 604, a permanent magnet 602 is provided on the front end of the insulating rod 603, a winding 5 is wound around the iron core 4, the strengthening groove 601 penetrates the inner side of the iron core 4, the mounting sleeve 604 is movably connected with the strengthening groove 601 by a thread, the hexagonal groove 605 is connected with the insulating rod 603, the permanent magnet 602 is fixedly installed with the iron core 4 through the insulating rod 603 and the mounting sleeve 604, and the magnetic suspension shaft When the magnetic force is weak, the permanent magnet 602 and the insulating rod 603 at its end are inserted into the reinforcing groove 601 on the inner side of the bearing cover 1 and the iron core 4, and the mounting sleeve 604 at the rear end of the insulating rod 603 is movably connected to the reinforcing groove 601 through a thread. At this time, the hexagonal wrench is inserted into the hexagonal groove 605 on the inner side of the mounting sleeve 604, so that when the wrench is rotated, it engages with the hexagonal groove 605 to drive the mounting sleeve 604 to rotate in the reinforcing groove 601 for fixing. After fixing, the insulating rod 603 and the permanent magnet 602 are located on the inner side of the iron core 4, so that the permanent magnet 602 increases the magnetic field strength of the winding 5, thereby enhancing the magnetic force.

[0031] Working principle: When the present invention is used, if the magnetic bearing has a problem and needs to be repaired, the bolts on the fixing frame 307 are screwed. After the bolts are screwed down, the annular permanent magnet piece 301 is pulled to rotate to the left through the push-pull groove 306. During the rotation, the outer snap-fit ​​block 302 on the outer wall and the inner snap-fit ​​block 303 on the inner wall of the annular permanent magnet piece 301 are also rotated to the left and drawn out from the snap-fit ​​groove 305. After being drawn out, the annular permanent magnet piece 301 is pulled up, and the outer snap-fit ​​block 302 and the inner snap-fit ​​block 303 are drawn out from the insertion groove 304 on the top of the bearing cover 1 and the shaft sleeve 2, so that The outer clamping block 302 is separated from the bearing cover 1, and the components such as the winding 5 can be inspected and repaired. The winding grounding, winding connection error and local damage of the winding can be checked by using an electrician, a multimeter, a megohmmeter, etc., and the residual magnetism of the magnetic suspension bearing is detected by using an M-type detector and an electromagnetic drill magnetometer. The bearing is placed in the M-type instrument detection device, and the device displays the magnetic field strength and magnetic field direction of the bearing. At this time, the bearing is rotated to observe whether the magnetic field strength and direction change, and it is determined whether there is residual magnetism in the bearing; the electromagnetic drill bit is fixed on the bearing, and the magnetic field on the bearing surface is measured while drilling. The strength of the magnetic force is determined according to the measurement results. When the magnetic force of the magnetic bearing is weakened, the permanent magnet 602 and the insulating rod 603 at its end are inserted into the reinforcing groove 601 on the inner side of the bearing cover 1 and the core 4, and the mounting sleeve 604 at the rear end of the insulating rod 603 is movably connected with the reinforcing groove 601 through a thread. At this time, the hexagonal wrench is inserted into the hexagonal groove 605 on the inner side of the mounting sleeve 604, so that when the wrench is rotated, it is engaged with the hexagonal groove 605 to drive the mounting sleeve 604 to rotate through the thread in the reinforcing groove 601 to be fixed. After being fixed, the insulating rod 60 3 and the permanent magnet 602 are located on the inner side of the iron core 4. The permanent magnet 602 can retain a high magnetic force for a long time in an open circuit state, is not easy to lose magnetism, and is not easy to be magnetized. The insulating rod 603 is used to isolate the adverse effect of the current on the permanent magnet 602, so that the permanent magnet 602 increases the magnetic field strength of the winding 5, thereby enhancing the magnetic force of the magnetic suspension bearing. When the permanent magnet 602 is installed, the overlapping area of ​​the installation sleeve 604 and the strengthening slot 601 can be adjusted to adjust the distance between the permanent magnet 602 and the winding 5. By adjusting the distance, the increased magnetic force of the permanent magnet 602 can be adjusted.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A magnetic bearing, comprising a bearing cover (1), characterized in that: A shaft sleeve (2) is fixed to the inner wall of the bearing cover (1), and a maintenance structure (3) is engaged with the inner side of the bearing cover (1); a strong magnetic structure (6) is provided on the outer wall of the bearing cover (1), and an iron core (4) is fixed to the inner wall of the bearing cover (1), and a winding (5) is provided on the iron core (4); The maintenance structure (3) comprises an annular permanent magnet piece (301), the outer wall of the annular permanent magnet piece (301) is provided with an outer snap-fit ​​block (302), and the inner wall of the annular permanent magnet piece (301) is provided with an inner snap-fit ​​block (303), the top of the bearing cover (1) is provided with an insertion groove (304), one side of the insertion groove (304) is provided with a snap-fit ​​groove (305), the surface of the annular permanent magnet piece (301) is provided with a push-pull groove (306), and a fixing frame (307) is provided on the annular permanent magnet piece (301); The strong magnetic structure (6) comprises a strengthening groove (601), a mounting sleeve (604) is movably arranged inside the strengthening groove (601), a hexagonal groove (605) is provided inside the mounting sleeve (604), an insulating rod (603) is arranged at the end of the mounting sleeve (604), and a permanent magnet (602) is arranged at the front end of the insulating rod (603).

2. A magnetic bearing according to claim 1, characterized in that: An insertion groove (304) is provided on the top of the bearing cover (1) and the top of the shaft sleeve (2), and a locking groove (305) is provided on one side of the insertion groove (304).

3. The magnetic bearing according to claim 1, characterized in that: The annular permanent magnet sheet (301) is connected to the bearing cover (1) and the shaft sleeve (2) by means of an outer snap-fit ​​block (302), an inner snap-fit ​​block (303), an insertion groove (304) and a snap-fit ​​groove (305).

4. The magnetic bearing according to claim 1, characterized in that: The outer snap-fit ​​block (302) and the inner snap-fit ​​block (303) are movably snap-fitted and connected with the insertion slot (304) and the snap-fit ​​slot (305).

5. The magnetic bearing according to claim 1, characterized in that: The annular permanent magnet sheet (301) is fixedly connected to the bearing cover (1) via a fixing frame (307) and bolts.

6. The magnetic bearing according to claim 1, characterized in that: The winding (5) is wound around the iron core (4), and the strengthening slot (601) penetrates to the inner side of the iron core (4).

7. The magnetic bearing according to claim 1, characterized in that: The installation sleeve (604) is movably connected to the reinforcement groove (601) via a thread, and the hexagonal groove (605) is connected to the insulation rod (603) via a through connection.

8. The magnetic bearing according to claim 1, characterized in that: The permanent magnet (602) and the iron core (4) are fixedly mounted via an insulating rod (603) and a mounting sleeve (604).

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