Magnetic suspension bearing transmission conversion box

Abstract

The utility model discloses a magnetic suspension bearing transmission conversion box which comprises a sizing roller, a left side radial magnetic suspension bearing, an axial magnetic suspension bearing, a rotating shaft thrust disc, an electromagnetic damper, a right side radial magnetic suspension bearing, a rotating shaft and a driving motor, and the left side radial magnetic suspension bearing and the right side radial magnetic suspension bearing are the same in structure; a transmission conversion box is assembled outside the driving motor, the transmission conversion box comprises a lower box body and an upper box body, a screw groove is formed in the position, located on the lower box body, of the joint of the lower box body and the upper box body, a screw hole is formed in the position, located on the upper box body, of the joint of the lower box body and the upper box body, and a bolt body is in threaded connection with the interiors of the screw hole and the screw groove; the magnetic suspension bearing transmission conversion box is simple in structure and convenient to operate, the conversion transmission box is divided into the upper box body and the lower box body, and a detachable structure is arranged between the upper box body and the lower box body, so that the conversion box is convenient to maintain, and the connection strength can be improved under the action of threaded connection.

Description

TECHNICAL FIELD

[0001] The patent relates to the field of magnetic suspension bearings, in particular to a magnetic suspension bearing transmission conversion box. BACKGROUND

[0002] Magnetic suspension bearings are a new type of high-performance bearings that use magnetic force to suspend rotors in space without mechanical friction. Magnetic suspension bearings have the advantages of no contact, no friction, small vibration, no need for lubrication, long service life, etc., which can significantly improve the vibration characteristics of rotating machinery, and therefore can be used to replace traditional high-speed rolling bearings and sliding bearings.

[0003] However, the bearing rotation conversion box in the prior art still has some shortcomings, such as inconvenience in disassembly and assembly, and low connection strength of the traditional conversion box, which is easy to damage, so the prior art needs to be improved. CONTENT OF THE INVENTION

[0004] In view of the shortcomings of the prior art, the purpose of the patent is to provide a magnetic suspension bearing transmission conversion box.

[0005] The technical solution adopted by the patent to solve its technical problems is: a magnetic suspension bearing transmission conversion box, comprising a fixed-size roller, a left radial magnetic suspension bearing, an axial magnetic suspension bearing, a shaft thrust disc, an electromagnetic damper, a right radial magnetic suspension bearing, a shaft, and a drive motor, the left radial magnetic suspension bearing and the right radial magnetic suspension bearing have the same structure;

[0006] The drive motor is externally equipped with a rotation conversion box, the transmission conversion box comprises a lower box body and an upper box body, a screw groove is formed on the lower box body at the connection between the lower box body and the upper box body, a screw hole is formed on the upper box body at the connection between the lower box body and the upper box body, and a bolt body is screwed in the screw hole and the screw groove;

[0007] The front ends of the upper box body and the lower box body are equipped with a bearing cylinder, and the end of the shaft passes through the bearing cylinder and is connected to the drive motor.

[0008] Further, the bearing cylinder comprises oppositely arranged shaft seats a and b, a rotating cavity is formed in the inner walls of the shaft seats a and b, and a ball is installed in the rotating cavity.

[0009] Further, limit rings are installed at the outer ends of the shaft seats a and b.

[0010] Further, a circular recess is formed at the bottom end of the bolt body, a bolt rod is installed at the bottom end of the circular recess, a fixing ring is installed at the outer upper end of the bolt rod, and an annular pressing piece, a spring, and an annular rubber sheet are sleeved on the circumferential surface of the bolt rod.

[0011] Further, an extrusion block is installed at the upper end edge of the annular rubber sheet, the outer wall of the bolt body is provided with a circular arc surface, and the surface of the circular arc surface is provided with anti-skid lines.

[0012] Further, the left radial magnetic suspension bearing and the right radial magnetic suspension bearing are controlled by an external variable control box to keep the force balance in the radial direction of the rotating shaft; the axial magnetic suspension bearings are symmetrically arranged based on the rotating shaft thrust disc, and the magnetism of the mutual components is different to keep the force balance in the axial direction of the rotating shaft.

[0013] Further, an electromagnetic damper is additionally arranged between the axial magnetic suspension bearing and the right radial magnetic suspension bearing, and the electromagnetic damper can achieve the purpose of almost eliminating the vibration of the magnetic suspension bearing.

[0014] The patent has the following beneficial effects:

[0015] The magnetic suspension bearing transmission conversion box has the advantages of simple structure and convenient operation, the conversion transmission box is arranged as two parts of an upper box body and a lower box body, and a detachable structure is arranged between the two parts, so that the conversion box is convenient to maintain, and the connection strength can be improved under the action of the threaded connection. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the structural schematic diagram of the patent.

[0017] Figure 2 is the internal schematic diagram of the axial magnetic suspension bearing of the patent.

[0018] Figure 3 is the schematic diagram of the bolt body of the patent.

[0019] Figure 4 is the schematic diagram of the bearing cylinder of the patent.

[0020] BRIEF DESCRIPTION OF DRAWINGS: 1, fixed size roller; 2, left radial magnetic suspension bearing; 3, axial magnetic suspension bearing; 4, electromagnetic damper; 5, right radial magnetic suspension bearing; 6, rotating shaft; 7, bearing cylinder; 71, shaft seat a; 72, fixed ring; 73, shaft seat b; 74, rotating cavity; 75, ball; 8, lower box body; 9, screw groove; 10, screw hole; 11, bolt body; 111, circular groove; 112, annular rubber sheet; 113, bolt rod; 114, extrusion block; 115, annular pressing sheet; 116, fixed ring; 117, spring; 118, circular arc surface; 12, upper box body; 13, rotating shaft thrust disc. DETAILED DESCRIPTION

[0021] The following further describes the patent in conjunction with specific embodiments, which should be understood as merely illustrative of the patent and not limiting the scope of the patent. Furthermore, it should be understood that those skilled in the art can make various modifications or improvements to the patent after reading the content taught by the patent, and these equivalent forms also fall within the scope defined by the claims attached to the patent.

[0022] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 is a structural diagram of the patent, a magnetic suspension bearing transmission conversion box, comprising a fixed size roller 1, a left side radial magnetic suspension bearing 2, an axial magnetic suspension bearing 3, a shaft thrust disc 13, an electromagnetic damper 4, a right side radial magnetic suspension bearing 5, a rotating shaft 6, a driving motor, characterized in that: the left side radial magnetic suspension bearing 2 and the right side radial magnetic suspension bearing 5 are the same structure; the driving motor is externally assembled with a rotating conversion box, the transmission conversion box comprises a lower box body 8 and an upper box body 12, a screw groove 9 is formed on the lower box body 8 at the connection between the lower box body 8 and the upper box body 12, a screw hole 10 is formed on the upper box body 12 at the connection between the lower box body 8 and the upper box body 12, and a screw body 11 is screwed in the screw hole 10 and the screw groove 9; the front ends of the upper box body 12 and the lower box body 8 are assembled with a bearing cylinder 7, and the end of the rotating shaft 6 passes through the bearing cylinder 7 and is connected to the driving motor.

[0023] In this technical solution, the left side radial magnetic suspension bearing and the right side radial magnetic suspension bearing have the same structure, both of which are composed of a radial magnetic suspension bearing stator and a magnetic pole coil, the radial magnetic suspension bearing stator has 8 pole shoes, and the magnetic pole coil is wound on the 8 pole shoes; the axial magnetic suspension bearing is composed of a thrust bearing stator and a permanent magnet block, the thrust bearing stator has 6 magnetic boxes, the permanent magnet block is fixed in the magnetic boxes, the driving motor is installed in the conversion box body composed of the upper box body 12 and the lower box body 8, and the two are connected and fixed by screwing.

[0024] In some technical solutions, the bearing cylinder 7 comprises oppositely arranged shaft seat a71 and shaft seat b73, the inner walls of the shaft seat a71 and the shaft seat b73 are provided with a rotating cavity 74, and the rotating cavity 74 is internally provided with a ball 75 in contact with the rotating shaft 6.

[0025] In this technical solution, the bearing cylinder 7 is oppositely arranged at the front ends of the upper box body 12 and the lower box body 8, and the rotating shaft 6 is installed in the bearing cylinder 7, so that the rotating efficiency of the rotating shaft 6 can be improved through the cooperation of the ball 75.

[0026] In some technical solutions, the outer ends of the shaft seat a71 and the shaft seat b73 are both provided with a limiting ring 72.

[0027] In the technical scheme, the shaft seat a 71 and the shaft seat b 73 are connected through the limiting ring 72.

[0028] In some technical schemes, the bottom end of the bolt body 11 is provided with a circular groove 111, the bottom end of the circular groove 111 is provided with a bolt rod 113, the outer upper end of the bolt rod 113 is provided with a fixing ring 116, and the circumferential surface of the bolt rod 113 is sleeved with an annular pressing piece 115, a spring 117 and an annular rubber sheet 112.

[0029] In the technical scheme, the annular pressing piece 115 is located on the upper side of the fixing ring 116, the spring 117 is located on the upper side of the annular pressing piece 115, and the annular rubber sheet 112 is located on the lower side of the fixing ring 116.

[0030] In some technical schemes, referring to Figure 3 , the upper end edge of the annular rubber sheet 112 is provided with a pressing block 114.

[0031] In the technical scheme, the annular pressing piece 115 is pressed downward due to the action of the spring 117, the pressing block 114 is pressed downward due to the action of the annular pressing piece 115, and the pressing block 114 further presses the edge of the annular rubber sheet 112, so that the sealing effect is improved.

[0032] In some technical schemes, the outer wall of the bolt body 16 is provided with a circular arc surface 168, and the surface of the circular arc surface 168 is provided with anti-skid lines.

[0033] In some technical schemes, the left radial magnetic suspension bearing 2 and the right radial magnetic suspension bearing 5 are controlled by an external variable control box to keep the force balance of the rotating shaft 6 in the radial direction; the axial magnetic suspension bearing 3 is symmetrically arranged based on the rotating shaft thrust disc 13, and the magnetism of the mutual components is different, so as to keep the force balance of the rotating shaft 6 in the axial direction. The electromagnetic damper 4 is additionally arranged between the axial magnetic suspension bearing 3 and the right radial magnetic suspension bearing 5, and the electromagnetic damper 4 can achieve the purpose of almost eliminating the vibration of the magnetic suspension bearing.

[0034] In the technical scheme, the left radial magnetic suspension bearing 2 and the right radial magnetic suspension bearing 5 are the same in structure, and are both composed of a radial magnetic suspension bearing stator and a magnetic pole coil, the radial magnetic suspension bearing stator has eight pole shoes, and the magnetic pole coil is wound on the eight pole shoes; the axial magnetic suspension bearing 3 is composed of a thrust bearing stator and a permanent magnet block, and the thrust bearing stator is provided with six magnetic boxes, and the permanent magnet block is fixed in the magnetic boxes.

[0035] It will be apparent to those skilled in the art that the present application is not limited to the specific embodiments described above, but that many other embodiments are possible within the scope of the present application. Thus, the scope of the present application should not be deemed limited to the embodiments described above, but rather should be deemed to include all embodiments falling within the meaning and range of equivalents of the claims appended hereto. No reference signs in the claims should be considered as limiting the scope of the claims in any way.

[0036] Furthermore, it should be understood that although the description above refers to particular embodiments, the description given above is not the only way in which the present application can be implemented. The above description is merely illustrative of the present application, and the present application should not be deemed limited to the embodiments described above.

Claims

1. A magnetic levitation bearing transmission conversion box, comprising a fixed-length roller (1), a left radial magnetic levitation bearing (2), an axial magnetic levitation bearing (3), a rotating shaft thrust plate (13), an electromagnetic damper (4), a right radial magnetic levitation bearing (5), a rotating shaft (6), and a drive motor, characterized in that: The left radial magnetic suspension bearing (2) and the right radial magnetic suspension bearing (5) are the same in structure. The outer part of the driving motor is provided with a rotating conversion box, the rotating conversion box comprises a lower box body (8) and an upper box body (12), a screw groove (9) is formed on the lower box body (8) at the connecting part of the lower box body (8) and the upper box body (12), a screw hole (10) is formed on the upper box body (12) at the connecting part of the lower box body (8) and the upper box body (12), and a bolt body (11) is screwed in the screw hole (10) and the screw groove (9). The front end of the upper box body (12) and the lower box body (8) is provided with a bearing cylinder (7), and the end of the rotating shaft (6) is connected to the driving motor after penetrating through the bearing cylinder (7).

2. A magnetic bearing transmission conversion box according to claim 1, characterized in that: The bearing cylinder (7) comprises oppositely arranged shaft seat a (71) and shaft seat b (73), the inner wall of the shaft seat a (71) and the shaft seat b (73) is provided with a rotating cavity (74), the rotating cavity (74) is internally provided with a ball (75), and the ball (75) is in contact with the rotating shaft (6).

3. A magnetic bearing transmission conversion box according to claim 2, characterized in that: The outer two ends of the shaft seat a (71) and the shaft seat b (73) are provided with a limiting ring (72).

4. The magnetic bearing transmission conversion box of claim 1, wherein: The bottom end of the bolt body (11) is provided with a circular groove (111), the bottom end of the circular groove (111) is provided with a bolt rod (113), the outer upper end of the bolt rod (113) is provided with a fixing ring (116), and the circumferential surface of the bolt rod (113) is provided with an annular pressing piece (115), a spring (117) and an annular rubber sheet (112).

5. A magnetic bearing transmission conversion box according to claim 4, characterized in that: The upper end edge of the annular rubber sheet (112) is provided with a pressing block (114), the outer wall of the bolt body (11) is provided with a circular arc surface (118), and the surface of the circular arc surface (118) is provided with anti-skid lines.

6. A magnetic bearing transmission conversion box according to claim 1, characterized in that: The left radial magnetic suspension bearing (2) and the right radial magnetic suspension bearing (5) are controlled by an external variable control box to keep the force balance of the rotating shaft (6) in the radial direction; the axial magnetic suspension bearing (3) is symmetrically arranged based on the rotating shaft thrust disc (13), the magnetism of the mutual components is different, and the force balance of the rotating shaft (6) in the axial direction is kept.

7. The magnetic bearing transmission conversion box of claim 1, wherein: The axial magnetic suspension bearing (3) and the right radial magnetic suspension bearing (5) are provided with an external electromagnetic damper (4), and the electromagnetic damper (4) can almost eliminate the vibration of the magnetic suspension bearing.

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