Permanent magnet electromagnetic bearing

Abstract

The utility model discloses a permanent magnet electromagnetic bearing which comprises a base, a top cover is arranged at the top end of the base, a circular base is arranged at the center of the top end of the top cover, a piece placing frame is arranged in the base, a first shaft seat is arranged at the upper end in the piece placing frame, and a second shaft seat is arranged in the top cover above the first shaft seat and the circular base. A movable seat is arranged above the circular base, a third shaft seat is arranged at the lower end in the movable seat, an electromagnetic bearing body is arranged in the third shaft seat, the second shaft seat and the first shaft seat, a rotating shaft is arranged at the center position in the electromagnetic bearing body, and the bottom end of the rotating shaft penetrates out of the first shaft seat; the top end of the rotating shaft penetrates through the third shaft seat and is provided with a rectangular block. According to the utility model, not only can the phenomena of abrasion and passivation caused by long-time operation of the rotating shaft be effectively reduced so as to guarantee the transmission efficiency of the electromagnetic bearing, but also the phenomenon of damage caused by dust invading into the electromagnetic bearing is reduced, and the purpose that the electromagnetic bearing is easy to disassemble and maintain is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic bearings, in particular to a permanent magnetic electromagnetic bearing. Background Art

[0002] With the development of modern industry, the performance requirements for bearings are getting higher and higher. Traditional bearings have problems such as friction and wear, which limit the operating speed and accuracy of equipment. Magnetic bearings, as a contactless and frictionless bearing form, have significant advantages. Therefore, a permanent magnetic electromagnetic bearing has been derived and has been widely used.

[0003] Reference announcement number CN204239469U is an auxiliary bearing structure of an electromagnetic bearing, which includes an auxiliary rolling bearing and a rotating shaft. The outer ring of the auxiliary rolling bearing is installed on the housing by interference connection, and the inner ring of the auxiliary rolling bearing and the rotating shaft are clearance matched. It also includes an elastic sleeve, which is arranged between the inner ring of the auxiliary rolling bearing and the rotating shaft. There is a clearance fit between the elastic sleeve and the rotating shaft, and there is an interference fit between the elastic sleeve and the inner ring of the auxiliary rolling bearing. Due to the addition of the elastic sleeve, the inner ring of the auxiliary rolling bearing is installed on the elastic sleeve by interference connection, and the outer ring of the rolling bearing is installed on the housing by interference connection. There is a clearance fit between the elastic sleeve and the rotating shaft. When the electromagnetic bearing fails, the rotor falls on the elastic sleeve, and the elastic sleeve can effectively absorb the impact work of the rotor falling, thereby protecting the auxiliary rolling bearing and the rotating shaft system. According to the above, although the electromagnetic bearing structure can be well applied, it is usually not convenient to lubricate the rotating shaft components, so that the electromagnetic bearing is prone to wear and passivation after long-term use, thereby affecting the transmission efficiency of the electromagnetic bearing, which often troubles people. Utility Model Content

[0004] The purpose of the utility model is to provide a permanent magnet electromagnetic bearing to solve the problem that although the electromagnetic bearing structure proposed in the above background technology can be well applied, it is usually not convenient to lubricate the rotating shaft components, which makes the electromagnetic bearing prone to wear and passivation after long-term use, thereby affecting the transmission efficiency of the electromagnetic bearing.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a permanent magnetic electromagnetic bearing comprises a base, a top cover is installed on the top of the base, a circular base is provided at the center position of the top of the top cover, a component frame is provided inside the base, a first shaft seat is provided at the upper end of the component frame, a second shaft seat is provided inside the top cover and the circular base above the first shaft seat, a movable seat is provided above the circular base, a third shaft seat is provided at the lower end of the movable seat, an electromagnetic bearing body is provided inside the third shaft seat, the second shaft seat and the first shaft seat, a rotating shaft is provided at the center position inside the electromagnetic bearing body, the bottom end of the rotating shaft passes through the outside of the first shaft seat, the top end of the rotating shaft passes through the third shaft seat and is provided with a rectangular block, a columnar connector is provided at the top end of the movable seat outside the rectangular block, a lubrication hole is provided on the outer wall of one side of the top cover, and one end of the lubrication hole extends to the inner side of the second shaft seat.

[0006] Preferably, threaded holes are provided at the corner positions on the top of the base, and dovetail holes are provided at the corner positions inside the top cover. Both ends of the dovetail holes extend to the outside of the top cover, and the dovetail holes and threaded holes are provided to facilitate the placement of locking bolts.

[0007] Preferably, a locking bolt is installed inside the dovetail hole, the bottom end of the locking bolt extends to the inside of the threaded hole, the locking bolt is threadedly connected to the threaded hole, and the lower end of the locking bolt passes through the dovetail hole and is screwed into the threaded hole to install the top cover on the top of the base.

[0008] Preferably, the top of the movable seat outside the cylindrical connecting head is provided with equally spaced pin holes, and the angle between adjacent pin holes is ninety degrees. The equally spaced pin holes are arranged so as to facilitate installation and connection of the external driven parts.

[0009] Preferably, a closing plate is bolted at the center of the bottom of the component placement frame, and the opening at the bottom of the component placement frame can be closed by the setting of the closing plate.

[0010] Preferably, a protective cover is provided on the outer wall of the top cover outside the lubrication hole, and an elastic connecting belt is provided on the outer wall on one side of the protective cover. The protective cover is provided to cooperate with the cover plate to shield and protect the lubrication hole.

[0011] Preferably, a cover plate is provided at one end of the elastic connecting band away from the protective cover, a buckle is provided at the edge of the inner wall of the cover plate, and a protrusion is provided on the outer wall of one side of the cover plate, so that the cover plate can be closed to the surface of the protective cover by buckling the buckle in the protective cover.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the permanent magnetic electromagnetic bearing can not only effectively reduce the wear and passivation of the rotating shaft after long-term operation to ensure the transmission efficiency of the electromagnetic bearing, but also reduce the damage caused by dust invading the interior of the electromagnetic bearing, and achieve the purpose of facilitating the disassembly and maintenance of the electromagnetic bearing;

[0013] (1) By setting the lubrication hole, the lubricating liquid can be injected into the inner side of the second shaft seat through the lubrication hole, and then the lubricating liquid can flow into the inner side of the first shaft seat and contact the outer wall of the rotating shaft to achieve the purpose of lubricating the rotating shaft, thereby effectively reducing the wear and passivation of the rotating shaft after long-term operation, thereby ensuring the transmission efficiency of the electromagnetic bearing;

[0014] (2) By calibrating the cover plate at the position of the protective cover, and then pressing the protrusion so that the buckle ring is buckled into the protective cover through the cover plate, the protective cover and the cover plate can shield and protect the lubrication hole to reduce the flow of external dust into the lubrication hole, thereby reducing the phenomenon of dust invading the interior of the electromagnetic bearing and causing damage;

[0015] (3) By turning the locking bolt and screwing the lower end of the locking bolt out of the threaded hole, the top cover can be removed from the top of the base, thereby achieving the purpose of facilitating the disassembly and maintenance of the electromagnetic bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the top view of the base structure of the utility model;

[0019] Figure 4 For this utility model Figure 1 Enlarged structural diagram at A in the middle.

[0020] In the figure: 1. base; 2. top cover; 3. dovetail hole; 4. locking bolt; 5. circular base; 6. movable seat; 7. cylindrical connector; 8. pin hole; 9. mounting frame; 10. first shaft seat; 11. second shaft seat; 12. third shaft seat; 13. closing plate; 14. electromagnetic bearing body; 15. rotating shaft; 16. rectangular block; 17. lubrication hole; 18. threaded hole; 19. protective cover; 20. elastic connecting belt; 21. cover plate; 22. buckle ring; 23. protrusion. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides an embodiment: a permanent magnetic electromagnetic bearing, comprising a base 1, a threaded hole 18 is provided at the corner position of the top of the base 1, a dovetail hole 3 is provided at the corner position inside the top cover 2, and both ends of the dovetail hole 3 extend to the outside of the top cover 2;

[0023] When in use, the dovetail hole 3 and the threaded hole 18 are arranged so as to place the locking bolt 4;

[0024] A locking bolt 4 is installed inside the dovetail hole 3, and the bottom end of the locking bolt 4 extends into the inside of the threaded hole 18, and the locking bolt 4 is threadedly connected to the threaded hole 18;

[0025] When in use, the top cover 2 is installed on the top of the base 1 by passing the lower end of the locking bolt 4 through the dovetail hole 3 and screwing into the threaded hole 18;

[0026] A top cover 2 is installed on the top of the base 1, a circular base 5 is provided at the center of the top of the top cover 2, a component placement frame 9 is provided inside the base 1, and a closing plate 13 is bolted at the center of the bottom of the component placement frame 9;

[0027] When in use, the closing plate 13 is provided to close the opening at the bottom of the mounting frame 9;

[0028] A first shaft seat 10 is provided at the upper end of the mounting frame 9, a second shaft seat 11 is provided inside the top cover 2 above the first shaft seat 10 and the circular base 5, a movable seat 6 is provided above the circular base 5, a third shaft seat 12 is provided at the lower end inside the movable seat 6, an electromagnetic bearing body 14 is provided inside the third shaft seat 12, the second shaft seat 11 and the first shaft seat 10, a rotating shaft 15 is provided at the center position inside the electromagnetic bearing body 14, the bottom end of the rotating shaft 15 passes through the outside of the first shaft seat 10, the top end of the rotating shaft 15 passes through the third shaft seat 12 and is provided with a rectangular block 16, a cylindrical connector 7 is provided at the top of the movable seat 6 outside the rectangular block 16, and pin holes 8 with equal spacing are provided at the top of the movable seat 6 outside the cylindrical connector 7, and the angle between adjacent pin holes 8 is ninety degrees;

[0029] When in use, the pin holes 8 are arranged at equal intervals so as to be installed and connected to the external driven parts;

[0030] A lubrication hole 17 is provided on the outer wall of one side of the top cover 2, one end of the lubrication hole 17 extends to the inner side of the second shaft seat 11, a protective cover 19 is provided on the outer wall of the top cover 2 outside the lubrication hole 17, and an elastic connecting belt 20 is provided on the outer wall of one side of the protective cover 19;

[0031] When in use, the protective cover 19 is provided to cooperate with the cover plate 21 to shield and protect the lubrication hole 17;

[0032] A cover plate 21 is provided at one end of the elastic connecting band 20 away from the protective cover 19, a buckle ring 22 is provided at the edge of the inner wall of the cover plate 21, and a protrusion 23 is provided on the outer wall of one side of the cover plate 21;

[0033] When in use, the buckle ring 22 is buckled into the protective cover 19 so as to close the cover plate 21 to the surface of the protective cover 19 .

[0034] When the embodiment of the present application is used, the cover plate 21 is first calibrated at the position of the protective cover 19, and then the protrusion 23 is pressed so that the buckle 22 is buckled into the protective cover 19 through the cover plate 21. The protective cover 19 can cooperate with the cover plate 21 to shield and protect the lubrication hole 17, so as to reduce the phenomenon that dust invades the inside of the electromagnetic bearing from the lubrication hole 17 and causes damage. After that, through the setting of the lubrication hole 17, the cover plate 21 can be detached from the surface of the lubrication hole 17, and then the lubricating liquid is injected into the inner side of the second shaft seat 11 through the lubrication hole 17, and the lubricating liquid can flow into the first shaft seat 10. The inner side contacts the outer wall of the rotating shaft 15 to lubricate the rotating shaft 15 to ensure the transmission efficiency of the electromagnetic bearing. Finally, by twisting the locking bolt 4, only the lower end of the locking bolt 4 needs to be screwed out to the outside of the threaded hole 18, and the top cover 2 can be removed from the top of the base 1 to facilitate the disassembly and maintenance of the electromagnetic bearing. In addition, the electromagnetic bearing is composed of a first shaft seat 10, a second shaft seat 11, a third shaft seat 12, an electromagnetic bearing body 14 and a rotating shaft 15 and other related components. It belongs to the prior art, so it is not described in detail to complete the use of the electromagnetic bearing.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A permanent magnetic electromagnetic bearing, characterized in that: The invention comprises a base (1), a top cover (2) is installed at the top of the base (1), a circular base (5) is provided at the center of the top of the top cover (2), a mounting frame (9) is provided inside the base (1), a first shaft seat (10) is provided at the upper end inside the mounting frame (9), a second shaft seat (11) is provided inside the top cover (2) above the first shaft seat (10) and the circular base (5), a movable seat (6) is provided above the circular base (5), a third shaft seat (12) is provided at the lower end inside the movable seat (6), and the third shaft seat (12) and the second shaft seat (11) are provided at the upper end of the movable seat (6), and the third shaft seat (12) and the second shaft seat (11) are provided at the lower end of the movable seat (6). 1) and an electromagnetic bearing body (14) is provided inside the first shaft seat (10), a rotating shaft (15) is provided at the center position inside the electromagnetic bearing body (14), the bottom end of the rotating shaft (15) passes through the outside of the first shaft seat (10), the top end of the rotating shaft (15) passes through the third shaft seat (12) and is provided with a rectangular block (16), a columnar connector (7) is provided at the top end of the movable seat (6) outside the rectangular block (16), a lubrication hole (17) is provided on the outer wall of one side of the top cover (2), and one end of the lubrication hole (17) extends to the inner side of the second shaft seat (11).

2. A permanent magnetic electromagnetic bearing according to claim 1, characterized in that: The corner positions of the top of the base (1) are all provided with threaded holes (18), the corner positions inside the top cover (2) are all provided with dovetail holes (3), and both ends of the dovetail holes (3) extend to the outside of the top cover (2).

3. A permanent magnetic electromagnetic bearing according to claim 2, characterized in that: A locking bolt (4) is installed inside the dovetail hole (3), the bottom end of the locking bolt (4) extends into the inside of the threaded hole (18), and the locking bolt (4) is threadedly connected to the threaded hole (18).

4. A permanent magnetic electromagnetic bearing according to claim 1, characterized in that: The top of the movable seat (6) outside the columnar connector (7) is provided with pin holes (8) at equal intervals, and the angle between adjacent pin holes (8) is ninety degrees.

5. A permanent magnetic electromagnetic bearing according to claim 1, characterized in that: A closing plate (13) is bolted at the center of the bottom of the component placement frame (9).

6. A permanent magnetic electromagnetic bearing according to claim 1, characterized in that: A protective cover (19) is provided on the outer wall of the top cover (2) outside the lubrication hole (17), and an elastic connecting belt (20) is provided on the outer wall of one side of the protective cover (19).

7. A permanent magnetic electromagnetic bearing according to claim 6, characterized in that: A cover plate (21) is provided at one end of the elastic connecting band (20) away from the protective cover (19), a buckle ring (22) is provided at the edge of the inner wall of the cover plate (21), and a protrusion (23) is provided on the outer wall of one side of the cover plate (21).

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