CN209083819U - A kind of permanent-magnet suspension bearing bearing radial and axial load - Google Patents

Abstract

The utility model discloses a permanent magnet suspension bearing capable of bearing radial and axial loads, comprising: a rotor sleeve is provided with an annular cavity; the rotor sleeve and the stator sleeve are both made of ferromagnetic materials; the stator sleeve comprises a coaxial fixed The outer shell and support seat are sleeved on the outside of the support seat, and the support seat is arranged in the annular cavity; a plurality of support magnetic rings arranged in the axial direction, and the support magnetic rings are arc-shaped , fixed on the upper part of the inner surface of the support seat; the magnetization direction of the support magnetic ring is radial magnetization, and the magnetic poles of two adjacent support magnetic rings are opposite; the lower surface of the support magnetic ring and the annular cavity are left with void. The permanent magnet suspension bearing provided by the utility model integrates the permanent magnet radial bearing and the permanent magnet thrust bearing into a whole, can bear radial load and axial load at the same time, has a compact structure, no contact between the rotor and the stator, no friction, No noise, no vibration, and long service life.

Description

A permanent magnet suspension bearing capable of bearing radial and axial loads

technical field

The utility model belongs to the technical field of bearings, in particular to a permanent magnet suspension bearing which can bear radial and axial loads.

Background technique

At present, there are two types of permanent magnet suspension bearings: radial and axial. The structure is as follows: the radial suspension bearing is composed of two magnetic rings of different sizes, and the small magnetic ring is sleeved in the large magnetic ring. Magnetization, in the same direction, the repulsive force between the two rings forms a force balance to achieve the effect of radial suspension; the axial suspension bearing is composed of magnetic rings of the same size, arranged coaxially and concentrically in the left and right or up and down directions, and both are axially magnetized And in the opposite direction, the force between the two rings forms a balance and plays the role of axial suspension.

The defect of the above-mentioned radial and axial permanent magnet suspension bearings is that they can only achieve radial or axial suspension, respectively, because the axial suspension has no radial buoyancy, and the radial suspension has no axial buoyancy.

Utility model content

The purpose of the utility model is to combine the permanent magnet bearing with axial support and radial support to provide a permanent magnet suspension bearing that can bear radial and axial loads.

For achieving the above object, the technical scheme provided by the present utility model is:

A permanent magnet suspension bearing capable of bearing radial and axial loads, comprising:

The first rotor sleeve and the second rotor sleeve are coaxially matched to form an annular rotor sleeve, the center of which has an axial through hole, and an annular cavity coaxial with the through hole is arranged in the annular rotor sleeve;

a stator sleeve, comprising a coaxial circular casing and a circular support seat located on the radial inner side thereof; the circular casing and the circular support seat are connected by a coaxial fixing ring;

The circular support seat is coaxially sleeved in the annular cavity, and there is a gap between the fixed ring and the annular rotor sleeve in the axial direction;

a plurality of supporting magnetic rings arranged in the axial direction, which are arc-shaped and fixed on the inner surface of the circular supporting seat; the supporting magnetic rings and the inner wall of the annular cavity leave a gap;

A plurality of inner magnetic rings arranged in the axial direction are fixedly sleeved outside the outer wall of the rotor sleeve, the magnetization direction of the inner magnet rings is radial magnetization, and the magnetic poles of two adjacent inner magnet rings are opposite;

A plurality of outer magnetic rings arranged in the axial direction are fixed on the inner side of the inner wall of the casing, the magnetization direction of the outer magnetic rings is radial magnetization, and the magnetic poles of two adjacent outer magnetic rings are opposite;

The inner magnetic ring and the outer magnetic ring are arranged in one-to-one correspondence, and the corresponding inner and outer magnetic rings have the same magnetization direction; a gap is left between the inner and outer magnetic rings; the annular rotor The sleeve and stator sleeve are made of ferromagnetic material.

Preferably, the central angle of the supporting magnetic ring is less than 180°.

Preferably, the annular rotor sleeve has an opening for accommodating the fixing ring, and two sides of the annular rotor sleeve are respectively provided with flanges extending radially outward; the left and right ends of the rotor sleeve are respectively provided with annular inner covers , the inner cover and the flange define the axial position of the inner magnetic ring.

Preferably, it further comprises: a rotating shaft, which passes through the through hole of the annular rotor sleeve and can rotate together with the annular rotor sleeve.

Preferably, it further comprises: an annular outer cover, which is rotatably supported on the rotating shaft, and the inner side surfaces of the annular outer cover are respectively fixed to the two ends of the circular shell while abutting against the outer magnet ring.

Preferably, it further comprises: annular positioning sleeves, which are respectively fixed on both ends of the rotating shaft, and the inner end surfaces of the annular positioning sleeves abut against the two ends of the annular rotor sleeve respectively, for defining the annular rotor sleeve the axial position.

Preferably, the magnetization direction of the support magnetic ring is radial magnetization, and the magnetic poles of two adjacent support magnet rings are opposite.

Preferably, it further comprises: a convex ring extending radially inward from the inner wall of the circular casing, the two ends of which abut against the outer magnetic ring.

Preferably, when the flange can abut the protruding ring, a gap is left between the inner magnetic ring and the outer magnetic ring and a gap is left between the supporting magnetic ring and the inner side wall of the annular cavity.

A permanent magnet suspension bearing capable of bearing radial and axial loads, comprising:

an annular rotor sleeve made of ferromagnetic material, wherein an annular cavity coaxial with the rotor sleeve is arranged;

A stator sleeve made of ferromagnetic material, comprising a coaxial circular shell and a circular support seat located on the radial inner side thereof; the circular shell and the circular support seat are connected by a connecting part;

The circular support seat is coaxially sleeved in the annular cavity, and there is a gap between the connecting portion and the annular rotor sleeve in the axial direction;

an arc-shaped support magnetic ring, which is fixed on the inner surface of the support seat, and has a gap between the support magnetic ring and the inner wall of the annular cavity;

an inner magnetic ring, which is fixedly arranged outside the outer wall of the rotor sleeve;

an outer magnetic ring, which is fixedly arranged on the inner side of the inner wall of the circular shell;

The inner magnetic ring and the outer magnetic ring are arranged correspondingly and have opposite magnetic poles, and a gap is left between the inner magnetic ring and the outer magnetic ring.

The beneficial effects of the utility model

The permanent magnet suspension bearing provided by the utility model integrates the permanent magnet radial bearing and the permanent magnet thrust bearing into a module, which can bear radial load and axial load at the same time, and has a compact structure, no contact between the rotor and the stator, and no friction. , No noise, no vibration, and has the advantage of long service life.

Description of drawings

FIG. 1 is a cross-sectional view of the overall structure of the permanent magnet suspension bearing capable of bearing radial and axial loads according to the present invention.

FIG. 2 is a schematic diagram of the overall structure of the rotor sleeve according to the utility model.

FIG. 3 is a sectional view of the rotor sleeve according to the utility model.

FIG. 4 is a schematic diagram of the overall structure of the stator sleeve according to the utility model.

FIG. 5 is a sectional view of the stator sleeve according to the utility model.

FIG. 6 is an exploded view of the rotor sleeve and the stator sleeve according to the utility model.

FIG. 7 is a cross-sectional view of the rotor sleeve and the stator sleeve according to the utility model.

8 is a schematic diagram of the installation position of the support magnetic ring and the stator sleeve according to the present invention.

FIG. 9 is an exploded view of the matching relationship between the rotor sleeve and the inner magnetic ring according to the utility model.

FIG. 10 is an exploded view of the cooperation relationship between the stator sleeve and the outer magnetic ring according to the present invention.

FIG. 11 is a schematic diagram of the radial support principle according to the present invention.

FIG. 12 is a schematic diagram of the axial support principle according to the present invention.

In the accompanying drawings, the list of components represented by each number is as follows:

110, rotor sleeve; 111, left rotor sleeve; 112, right rotor sleeve; 113, shaft mounting hole; 114, annular cavity; 115, annular opening; 116, inner stop ring; 117, inner cover; 120, stator sleeve; 121, shell; 122, support seat; 123, fixing ring; 124, magnetic ring seat; 125, support end cover; 126, outer stop ring; 127, outer cover; 130, shaft; 140, support magnetic ring; 141 , outer ring; 142, inner ring; 143, key; 150, inner magnetic ring; 160, outer magnetic ring; 170, positioning sleeve; 180, sliding bearing.

Detailed ways

The present utility model will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can refer to the text of the description to implement it accordingly.

As shown in FIG. 1 , the present invention provides a permanent magnet suspension bearing capable of bearing radial and axial loads, including a rotor sleeve 110 and a stator sleeve 120 . There are two rotor sleeves 110 arranged symmetrically on the left and right.

As shown in FIG. 2 and FIG. 3 , the rotor sleeve 110 includes a left rotor sleeve 111 and a right rotor sleeve 112 arranged symmetrically. The right end of the left rotor sleeve 111 is in contact with the left end of the right rotor sleeve 112 to form a complete Rotor sleeve 110 . The rotor cover 110 is arranged in two parts, which is convenient for disassembly and assembly. Both the rotor sleeve 110 and the stator sleeve 120 are made of ferromagnetic material. In order to achieve better processing performance, improve processing accuracy, and reduce costs, the left rotor sleeve 111 and the right rotor sleeve 112 can be designed in separate parts, that is, the outer ring 141 and the inner ring 142 are connected together by screws. Of course, the outer ring 141 and the inner ring 142 may also have an integrated structure.

The middle of the rotor sleeve 110 is provided with a horizontal and conventional rotating shaft mounting hole 113 for mounting the rotating shaft 130 . The rotating shaft 130 passes through the rotating shaft mounting hole 113 , and the rotating shaft 130 is in interference fit with the rotating shaft mounting hole 113 . The rotating shaft 130 is arranged horizontally, and the rotor sleeve 110 is connected with the rotating shaft through a key 143, and can rotate together with the rotating shaft around the horizontal axis.

An annular cavity 114 is provided in the rotor sleeve 110 , and an annular opening 115 is disposed in the middle of the outer wall of the rotor sleeve 110 , and the annular opening 115 communicates with the annular cavity 114 .

On the outer wall of the rotor sleeve 110 , on the left and right sides of the annular opening 115 , there are respectively provided inner baffle rings 116 protruding outward in the radial direction.

As shown in FIGS. 4 and 5 , the stator sleeve 120 includes a casing 121 and a support seat 122 , the casing 121 and the support seat 122 are both hollow cylindrical, and the casing 121 is coaxially sleeved on the outside of the support seat 122 . The housing 121 and the support base 122 are fixed together by a fixing ring 123 located in the axial middle position therebetween. The magnetic ring seat 124 is located at the top of the inner circumference of the support seat 122 .

As shown in FIG. 6 and FIG. 7 , the support seat 122 is located in the annular cavity 114 of the rotor sleeve 110 , and the fixing ring 123 passes through the annular opening 115 . By separating the left rotor sleeve 111 and the right rotor sleeve 112 , respectively Move from the outside to the middle and fit the shaft mounting holes 113 of the left rotor sleeve 111 and the right rotor sleeve 112 together, and there is a gap between the two inner baffle rings 116 and the fixing ring 123, so that the rotor sleeve 110 and the stator sleeve 120 are connected. assembly. The housing 121 is fixed in the bearing seat by means of interference, so that the stator sleeve 120 is fixed. The rotor casing 110 is rotatable relative to the stator casing 120 .

As shown in FIG. 4 , FIG. 5 , and FIG. 8 , a magnetic ring seat 124 along the horizontal direction for mounting the supporting magnetic ring 140 is disposed on the upper part of the inner surface of the support seat 122 . A support magnetic ring 140 is provided in the magnetic ring seat 124 . The supporting magnetic ring is in the shape of a circular arc, and its central angle is less than 180°. The supporting magnetic rings 140 are provided in plurality and are closely arranged in the horizontal direction. The magnetization direction of the supporting magnetic rings 140 is radial magnetization, and the magnetic poles of two adjacent supporting magnetic rings 140 are opposite to each other. A gap is left between the lower surface of the supporting magnetic ring 140 and the annular cavity 114 so that the rotor sleeve 110 will not interfere with the supporting magnetic ring 140 when it rotates around the axis. The left and right ends of the support base 122 are respectively provided with support end caps 125 , and the support magnetic ring 140 is axially fixed by the two support end caps 125 .

As shown in FIG. 9 , on the outer wall of the rotor sleeve 110, there are a plurality of inner magnetic rings 150 closely arranged in the axial direction. The magnetization direction of the inner magnet rings 150 is radial magnetization, and two adjacent inner magnet rings 150 The magnetic poles are opposite. In this embodiment, there are two groups of inner magnetic rings 150 , and each group is composed of nine inner magnetic rings 150 . One group of inner magnetic rings 150 is fitted on the outer wall of the left rotor casing 111 from the left end of the left rotor casing 111 to the right, and the other group is fitted on the outer wall of the right rotor casing 112 from the right end of the right rotor casing 112 to the left. superior. The innermost two inner magnetic rings 150 of the two groups of inner magnetic rings 150 are respectively attached to the two inner retaining rings 116 , and two inner covers 117 are respectively provided at both ends of the rotor sleeve 110 . The inner covers 117 are connected to the rotor sleeve 110 In a fixed manner, the inner sides of the two inner covers 117 are respectively fitted with the two outermost inner magnetic rings 150 of the two groups of inner magnetic rings 150 , and the two inner covers 117 and the two inner retaining rings 116 are used to align the two groups of inner magnetic rings 150 . The ring 150 acts as an axial fixation.

As shown in FIG. 1 , FIG. 5 , and FIG. 10 , the inner wall of the housing 121 is provided with an outer magnetic ring 160 corresponding to the inner magnetic ring 150 . The number of the outer magnetic rings 160 is the same as the number of the inner magnetic rings 150 . The positions are also the same, that is, the inner magnetic rings 150 and the outer magnetic rings 160 are arranged in a one-to-one correspondence, and the outer magnetic rings 160 are also provided with two groups of 9 pieces in each group. The corresponding inner magnetic ring 150 and the outer magnetic ring 160 are magnetized in the same direction, that is, the magnetic pole of the outer ring of the corresponding inner magnetic ring 150 is opposite to the magnetic pole of the inner ring of the outer magnetic ring 160 . A gap is left between the inner magnetic ring 150 and the outer magnetic ring 160 . An outer baffle ring 126 for limiting is provided in the inner middle of the casing 121 , and two outer covers 127 are respectively provided at both ends of the casing 121 . The outermost two outer magnetic rings 160 of the two sets of outer magnetic rings 160 are fitted together, and the two outer magnetic rings 160 are axially fixed by the two outer covers 127 and the outer blocking ring 126 .

As shown in FIG. 1, a positioning sleeve 170 is arranged between the outer cover 127 and the rotating shaft 130, and a sliding bearing 180 is arranged between the positioning sleeve 170 and the outer cover 127. The function of the sliding bearing is to support the rotor sleeve and the stator sleeve to ensure that both The relative position remains unchanged.

Through the above arrangement, the permanent magnet suspension bearing provided by the present invention can bear radial load and axial load at the same time. It works as follows.

As shown in FIG. 11 , during use, the stator sleeve 120 is fixed, and the rotor sleeve 110 rotates around the axis together with the rotating shaft. A support magnetic ring 140 is arranged above the inner surface of the support seat 122. Since the rotor sleeve 110 is made of ferromagnetic material, the support magnetic ring 140 will give the rotor sleeve 110 an upward suction force, thereby supporting the load on the rotating shaft and the self-weight of the rotating shaft, that is, The radial load is realized.

As shown in FIG. 12 , in use, the stator sleeve 120 is fixed, and the rotor sleeve 110 rotates around the axis together with the rotating shaft. When no axial load is applied, the corresponding inner magnetic ring 150 and outer magnetic ring 160 are located at the same axial position. When the rotating shaft is subjected to a rightward axial force, the rotor sleeve 110 moves to the right along with it. Due to the mutual coupling of the magnetic forces of the corresponding inner magnetic ring 150 and the outer magnetic ring 160, a leftward thrust is given to the rotor sleeve 110, Balance the axial force it experiences in its work.

Further, the sliding bearing is also an important part of the permanent magnet suspension bearing, its purpose is to carry the axial load and radial load, most of which have been offset by the radial support magnetic steel suction, so the load is much smaller than the traditional installation method of the sliding bearing.

Further, the position of the sliding bearing can be set at multiple positions between the fixed part and the rotating part of the bearing according to different use requirements and environments, and is not limited to the positions given in the figures.

Further, the present invention can also be used in conjunction with rolling bearings or other bearings, not just sliding bearings.

Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the description and the embodiments, and can be applied to various fields suitable for the present invention. For those skilled in the art, Additional modifications may readily be implemented, therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (10)

1. the permanent-magnet suspension bearing that one kind can bear radial and axial load characterized by comprising

The first rotor set and the second rotor set coaxial cooperation form ring-shaped rotor set, and center has axially extending bore, the annular The toroidal cavity coaxial with the through-hole is provided in rotor set；

Stator sleeve comprising coaxial circular housing and the circular support seat positioned at its radially inner side；The circular housing and circle Shape support base is connected by coaxial fixed ring；

The circular support seat is coaxially set in the toroidal cavity, between the fixed ring and ring-shaped rotor set axial direction With gap；

Multiple axially aligned support magnet rings are arc-shaped and are fixed on the circular support base inner surface；It is described Supporting the inner wall of magnet ring and toroidal cavity, there are gaps；

Multiple axially aligned internal magnetic rings fix the outer exterior wall for being set in the rotor set, the internal magnetic ring side of magnetizing To for radial magnetizing, the magnetic pole of two neighboring internal magnetic ring is opposite；

Multiple axially aligned outer magnetic rings are fixed on the inside of the outer casing inner wall, and the outer magnetic ring magnetizing direction is radial It magnetizes, the magnetic pole of two neighboring outer magnetic ring is opposite；

Wherein, the internal magnetic ring and outer magnetic ring correspond arrangement, and corresponding internal magnetic ring is identical as outer magnetic ring magnetizing direction；Institute State between internal magnetic ring and outer magnetic ring that there are gaps；The ring-shaped rotor set and stator sleeve are made of ferrimagnet.

2. the permanent-magnet suspension bearing according to claim 1 for bearing radial and axial load, which is characterized in that the branch The central angle of magnet ring is supportted less than 180 °.

3. the permanent-magnet suspension bearing according to claim 1 or 2 for bearing radial and axial load, which is characterized in that institute State ring-shaped rotor set and have and accommodate the opening that the fixed ring passes through, two sides be respectively arranged with extend radially outward it is convex Edge；The left and right ends of the rotor set are respectively arranged with annulus inner cover, and the inner cover and the flange limit the axial direction of internal magnetic ring Position.

4. the permanent-magnet suspension bearing according to claim 1 or 2 for bearing radial and axial load, which is characterized in that also Include:

Shaft, passes through the through-hole of ring-shaped rotor set, and can rotate jointly with the ring-shaped rotor set.

5. the permanent-magnet suspension bearing according to claim 4 for bearing radial and axial load, which is characterized in that also wrap It includes:

Shaped outer cover is rotatably supported in the shaft, and the medial surface of the shaped outer cover is outer with the circle respectively The both ends of shell are fixed simultaneously against the fitting outer magnetic ring.

6. the permanent-magnet suspension bearing according to claim 5 for bearing radial and axial load, which is characterized in that also wrap It includes:

Circular orientation set, the inner face for being separately fixed at the both ends of the shaft and circular orientation set bear against institute The both ends for stating ring-shaped rotor set, for limiting the axial position of the ring-shaped rotor set.

7. the permanent-magnet suspension bearing according to claim 6 for bearing radial and axial load, which is characterized in that

The support magnet ring magnetizing direction is radial magnetizing, and the magnetic pole of two neighboring support magnet ring is opposite.

8. the permanent-magnet suspension bearing according to claim 3 for bearing radial and axial load, which is characterized in that also wrap Include: the bulge loop extended from the circular housing inner wall to radially inner side, both ends are against the outer magnetic ring.

9. the permanent-magnet suspension bearing according to claim 8 for bearing radial and axial load, which is characterized in that when described When flange can be against the bulge loop, there are gap and the support magnet ring and annular are empty between the internal magnetic ring and outer magnetic ring There are gaps for the inner sidewall of chamber.

10. the permanent-magnet suspension bearing that one kind can bear radial and axial load characterized by comprising

Ring-shaped rotor set made of ferrimagnet is arranged inside and covers coaxial toroidal cavity with the rotor；

Stator sleeve made of ferrimagnet comprising coaxial circular housing and the circular support seat positioned at its radially inner side； The circular housing is connected with circular support seat by interconnecting piece；

The circular support seat is coaxially set in the toroidal cavity, between the interconnecting piece and ring-shaped rotor set axial direction With gap；

Arc-shaped support magnet ring is fixed on the support base inner surface, the support magnet ring and the toroidal cavity Inner wall has gap；

Internal magnetic ring is fixed at the rotor set outer exterior wall；

Outer magnetic ring is fixed at the circular housing inner wall；

Wherein the internal magnetic ring and outer magnetic ring correspond to arrangement and opposite face magnetic pole on the contrary, staying between the internal magnetic ring and outer magnetic ring There is gap.