CN201531526U - Permanentmagnet suspension bearing and permanentmagnet suspension bearing assembly - Google Patents
Permanentmagnet suspension bearing and permanentmagnet suspension bearing assembly Download PDFInfo
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- CN201531526U CN201531526U CN2009202206554U CN200920220655U CN201531526U CN 201531526 U CN201531526 U CN 201531526U CN 2009202206554 U CN2009202206554 U CN 2009202206554U CN 200920220655 U CN200920220655 U CN 200920220655U CN 201531526 U CN201531526 U CN 201531526U
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Abstract
A permanentmagnet suspension bearing includes an inner ring of a permanent magnet; an outer ring make of non-magnetoconductivity material, the thickness of the inner ring in an axial direction is less than that of the outer ring in the axial direction, and the outer diameter of the inner ring is less than that the inner diameter of the outer ring; a first radial permanent magnet embedded in the outer ring and absorbed with the inner ring through magnetic force; a plurality of axial permanent magnets, wherein at least one axial permanent magnet is fixed on the end face of a first end of the outer ring along the axial direction, at least one axial permanent magnet is fixed on the end face of a second end of the outer ring along the axial direction, and the repulsion force of the axial permanent magnet located on the end face of the first end to the inner ring and the repulsion force of the axial permanent magnet located on the end face of the second end to the inner ring is zero. A permanentmagnet suspension bearing assembly includes the permanentmagnet suspension bearing. The permanentmagnet suspension bearing of the utility model may be implemented by a simple structure including the inner ring and outer ring of the permanent magnet, the first radial permanent magnet and axial permanent magnets.
Description
Technical field
The utility model relates to a kind of permanent-magnet suspension bearing and permanent magnetic suspending shaft bearing assembly.
Background technique
The conventional magnetic levitation bearing generally includes two kinds, and a kind of is the permanent magnet magnetic force bearing, and another kind is the electromagnetism magnetic bearing.
Because the electromagnetism magnetic bearing needs a whole set of detection, control system, thus the structure of electromagnetism magnetic bearing comparatively complexity and cost are higher relatively, be applicable to usually in the big-and-middle-sized equipment.
And current permanent-magnet suspension bearing is in order to obtain axial stability and stability radially, also need to be provided with comparatively complicated pole arrangement usually, for example need the support of jewel thimble usually, thereby cause the structure of this permanent-magnet suspension bearing comparatively complicated, and the difficulty of making is relatively large.
Thereby, need the comparatively simple structure of a kind of utilization just can realize the permanent-magnet suspension bearing of axial stability and radial stability.
The model utility content
The purpose of this utility model is to overcome the defective of structure relative complex in traditional permanent-magnet suspension bearing, and provides a kind of structure more simple permanent-magnet suspension bearing.
According to an aspect of the present utility model, a kind of permanent-magnet suspension bearing is provided, wherein this permanent-magnet suspension bearing comprises: inner ring, this inner ring are permanent magnet; Outer ring, described inner ring are enclosed within this outer ring, and the thickness of described inner ring is less than the thickness of described outer ring, and the external diameter of described inner ring is less than the internal diameter of described outer ring, and this outer ring is made by the non-magnetic material; The first radial permanent magnet body, this first radial permanent magnet body embeds in the described outer ring, and magnetic force is inhaled mutually between this first radial permanent magnet body and the described inner ring; A plurality of axial permanent magnetic bodies, at least one axial permanent magnetic body is fixed on the end face of described outer ring first end in axial direction, at least one axial permanent magnetic body is fixed on the end face of described outer ring second end in axial direction, and the repulsion that described inner ring is positioned at the axial permanent magnetic body on the first end end face and the repulsion that is positioned at the axial permanent magnetic body on the second end end face making a concerted effort in the axial direction is zero.
According on the other hand of the present utility model, a kind of permanent magnetic suspending shaft bearing assembly also is provided, this permanent magnetic suspending shaft bearing assembly comprises discoidal housing and an above-mentioned permanent-magnet suspension bearing, a described permanent-magnet suspension bearing is positioned at this housing, this housing has the hole of running through the wall of this housing along the central axis of described permanent-magnet suspension bearing, and the diameter in this hole is not less than the diameter of barrel surface at the inner circumferential surface place of described axial permanent magnetic body.
According to one side more of the present utility model, a kind of permanent magnetic suspending shaft bearing assembly also is provided, this permanent magnetic suspending shaft bearing assembly comprises at least two above-mentioned permanent-magnet suspension bearings provided by the utility model, identical and the outer ring each permanent-magnet suspension bearing of each permanent-magnet suspension bearing has identical central axis, wherein, the axial permanent magnetic body between the inner ring of any two shared these two adjacent permanent-magnet suspension bearings of adjacent permanent-magnet suspension bearing.
According to permanent-magnet suspension bearing provided by the utility model and permanent magnetic suspending shaft bearing assembly, the inner ring of permanent magnet is subjected to the suction of radial permanent magnet body, because in the radial permanent magnet body embedding outer ring, thereby the direction of this suction is the radial direction along the outer ring.Simultaneously, in the axial direction, the axial permanent magnetic body that is positioned on the end face of first end is zero to the repulsion of inner ring with being positioned at that axial permanent magnetic body on the second end end face makes a concerted effort to the repulsion of inner ring, thereby can keep inner ring always to be in steady state in the axial direction.
Therefore, when non-bearing, in the permanent-magnet suspension bearing provided by the utility model, inner ring is subjected to the attraction of the first radial permanent magnet body and is in eccentric position in the outer ring, but is located axially at the settling position between two end faces of outer ring.When carrying, the load that affacts on the inner ring offsets with the magnetic attraction between the first radial permanent magnet body and the inner ring, thereby makes inner ring be in the central position of outer ring or the position of close this central position, thereby makes inner ring be in state of suspension.Simultaneously, in the axial direction, inner ring still is in steady state.Thereby, the time can realize the state of suspension of inner ring in carrying, can be done by the inner ring supporting rotating shaft almost not have the rotation that rubs.
By above description as can be known, utilize the simple structure of the inner ring, the first radial permanent magnet body and the axial permanent magnetic body that comprise outer ring, permanent magnet, just can realize permanent-magnet suspension bearing of the present utility model and permanent magnetic suspending shaft bearing assembly.
Description of drawings
Fig. 1 is the decomposing schematic representation according to the permanent-magnet suspension bearing of a kind of mode of execution of the utility model;
Fig. 2 is the axial, cross-sectional view of permanent-magnet suspension bearing among Fig. 1;
Fig. 3 is the schematic representation of the center cross-sectional of the outer ring of permanent-magnet suspension bearing among Fig. 1;
Fig. 4 is the stereogram of the first radial permanent magnet body in the permanent-magnet suspension bearing among Fig. 1;
Fig. 5 is the axial projection drawing along the outer ring of the first radial permanent magnet body among Fig. 4;
Fig. 6 is the orthographic projection view of permanent-magnet suspension bearing axial direction, wherein, with the part of outer ring 2 cut open with represent the first radial permanent magnet body on the outer ring with the relative position relation of axial permanent magnetic body on the outer ring;
Fig. 7 is the schematic representation of the distribution of each magnetic pole of permanent-magnet suspension bearing in the presentation graphs 1; With
Fig. 8 is the distribution schematic diagram of each magnetic pole in a kind of mode of execution of expression permanent magnetic suspending shaft bearing assembly of the present utility model.
Embodiment
Below with reference to accompanying drawing embodiment of the present utility model is described in detail.
As depicted in figs. 1 and 2, permanent-magnet suspension bearing provided by the utility model comprises:
The first radial permanent magnet body 3, this first radial permanent magnet body 3 embeds in described outer ring 2, and magnetic force is inhaled mutually between this first radial permanent magnet body 3 and the described inner ring 1;
A plurality of axial permanent magnetic bodies 4, at least one axial permanent magnetic body is fixed on the end face 6 of described outer ring 2 first end in axial direction, at least one axial permanent magnetic body 4 is fixed on the end face 7 of described outer ring 2 second end in axial direction, the repulsion that is positioned at the 4 pairs of described inner rings 1 of axial permanent magnetic body on the first end end face 6 and the repulsion that is positioned at the 4 pairs of described inner rings 1 of axial permanent magnetic body on the second end end face 7 making a concerted effort in the axial direction is zero, thereby inner ring 1 is realized the stress balance state in the axial direction.
Preferably, the number that is positioned at the axial permanent magnetic body 4 on the first end end face 6 equals to be positioned at the number of the axial permanent magnetic body 4 on the second end end face 7, so that realize inner ring 1 stress balance state in the axial direction.
The inner ring 1 of described permanent-magnet suspension bearing is a permanent magnet, and inner ring 1 is usually as the rotary component in the bearing.In other words, after the carrying of described permanent-magnet suspension bearing, for example axle head is inserted inner ring 1 after, this inner ring 1 can together rotate with axle.
Preferably, outer ring 2 is made by non-magnet material, and inner ring 1 is contained in the outer ring 2, and the thickness of described inner ring 1 is less than the thickness of described outer ring 2, and the external diameter of described inner ring 1 is less than the internal diameter of described outer ring 2.
In addition, in outer ring 2, also be embedded with the first radial permanent magnet body 3, this first radial permanent magnet body 3 and inner ring 1 mutual magnetic attraction.Because the first radial permanent magnet body 3 is positioned at the position of radial direction with respect to inner ring 1, thereby the attraction force of 3 pairs of inner rings 1 of the first radial permanent magnet body is actually the radial attraction force to inner ring 1.Under the non-bearing state, inner ring 1 is drawn onto on the first radial permanent magnet body 3 or on the outer ring 2.At this moment, inner ring 1 is in eccentric position in outer ring 2.
In the axial direction, at least one axial permanent magnetic body 4 is fixed on the end face 6 of described outer ring 2 first end in axial direction, at least one axial permanent magnetic body 4 is fixed on the end face 7 of described outer ring 2 second end in axial direction, the repulsion of the 4 pairs of described inner rings 1 of axial permanent magnetic body on the repulsion that is positioned at the 4 pairs of described inner rings 1 of axial permanent magnetic body on the end face 6 of first end and the end face 7 that is positioned at second end axial direction to make a concerted effort be zero.
Obviously, because in the axial direction, be positioned at the repulsion of the 4 pairs of described inner rings 1 of axial permanent magnetic body on the end face 6 of first end, and the repulsion that is positioned at the 4 pairs of described inner rings 1 of axial permanent magnetic body on the end face 7 of second end axial direction to make a concerted effort be zero, thereby can make inner ring 1 be in state of equilibrium in the axial direction.In case a certain end of inner ring 1 deflection outer ring 2, the repulsion of then should end going up 4 pairs of these inner rings 1 of axial permanent magnetic body that are provided with increases, and the repulsion of other 4 pairs of these inner rings 1 of axial permanent magnetic body that are provided with on the other end reduces, and returns to state of equilibrium again thereby promote inner ring 1.
Certainly, the repulsion that is positioned at the repulsion of the 4 pairs of described inner rings 1 of axial permanent magnetic body on the end face 6 of first end and is positioned at the 4 pairs of described inner rings 1 of axial permanent magnetic body on the end face 7 of second end in the radial direction can be zero with joint efforts; Also can be non-vanishing.Preferably, the repulsion of the 4 pairs of described inner rings 1 of axial permanent magnetic body on the repulsion that is positioned at the 4 pairs of described inner rings 1 of axial permanent magnetic body on the end face 6 of first end and the end face 7 that is positioned at second end is identical in the direction of the suction of in the radial direction 3 pairs of inner rings 1 of the direction of making a concerted effort and the first radial permanent magnet body.
Preferably, the geometrical shape of each axial permanent magnetic body 4 all is identical with the magnetic intensity in the magnetic field that is produced, and the distribution of axial permanent magnetic body 4 each permanent magnets on the distribution that is arranged in axial permanent magnetic body 4 each permanent magnets on the end face 6 of first end and the end face 7 that is arranged in second end is with respect to center cross-sectional 8 symmetries of outer ring 2, thereby is convenient to realize that inner ring 1 stressed making a concerted effort in the axial direction is zero.
The end face 6 of described outer ring 2 first end in axial direction is all parallel with center cross-sectional 8 with the end face 7 of described outer ring 2 second end in axial direction, and with respect to these center cross-sectional 8 symmetries, as shown in Figure 3.
The described first radial permanent magnet body 3 is used for inner ring 1 is applied magnetic attracting force.The shape of this first radial permanent magnet body 3 does not have specific (special) requirements, if can with the magnetic attraction of inner ring 1.
For the ease of 2 the setting in the outer ring of the first radial permanent magnet body 3, the first radial permanent magnet body 3 is a ring segment shape body, as shown in Figure 1 but preferably.So-called ring segment shape body is meant, sees the part that is projected as annular of this first radial permanent magnet body 3 in Fig. 1 on the axial direction of outer ring 2, simultaneously, on the axial direction of outer ring 2, the first radial permanent magnet body 3 of ring segment shape body also has thickness d 3, as shown in Figure 4 and Figure 5.
The first radial permanent magnet body 3 of this ring segment shape body can be arranged on the outer ring 2 in any suitable manner, as long as satisfy when inner ring 1 is applied magnetic attracting force, the rotation that does not influence inner ring 1 gets final product.For example, the first radial permanent magnet body 3 can embed on the external peripheral surface of outer ring 2.
Preferably, the described first radial permanent magnet body 3 is identical with described outer ring 2 width radially along the width w3 (as shown in Figure 5) of described outer ring 2 radial direction, the inner circumferential surface of the first radial permanent magnet body 3 aligns with the inner circumferential surface of outer ring 2, and the external peripheral surface of the first radial permanent magnet body 3 also aligns with the external peripheral surface of outer ring 2.In this structure, under the non-bearing state, inner ring 1 is drawn onto on the inner circumferential surface of the first radial permanent magnet body 3, as shown in Figure 2.
Usually, for the first radial permanent magnet body 3 is installed, can set in advance groove 13 in outer ring 2, these groove 13 internal fixation of in assembly process the first radial permanent magnet body 3 being packed into then get final product.
The first radial permanent magnet body 3 of ring segment shape body is packed in the outer ring 2, adopt two kinds of mode of structure usually.
The ring segment shape body of first kind of mode as shown in Fig. 1, Fig. 4 and Fig. 5, wherein, two end faces 9,10 of the first radial permanent magnet body 3 of this ring segment shape body (these two end faces are also parallel to each other) parallel with the central axis of outer ring 2.In this structure, the pairing central angle of circular arc of the circumferencial direction of the inner circumferential surface of ring segment shape body is different with the pairing central angle of the circular arc of the circumferencial direction of external peripheral surface.
Another kind of mode as shown in Figure 6, the central axis of outer ring 2 is positioned at two end faces 9,10 of the first radial permanent magnet body 3 of ring segment shape body.In this structure, the pairing central angle of circular arc of the circumferencial direction of the inner circumferential surface of ring segment shape body is identical with the pairing central angle of the circular arc of the circumferencial direction of external peripheral surface.
In order to make 3 pairs of inner rings of the first radial permanent magnet body 1 produce suitable enough magnetic attracting forces, preferably, the circular arc of the circumferencial direction of the inner circumferential surface of the ring segment shape body of the described first radial permanent magnet body 3 (arc AB as shown in Figure 5) pairing central angle (central angle alpha as shown in Figure 6) is that 60 degree are to 100 degree.
Further preferably, the pairing central angle of circular arc of the circumferencial direction of the inner circumferential surface of the ring segment shape body of the first radial permanent magnet body 3 is 90 degree.
Preferably, the described first radial permanent magnet body 3 is arranged in neutral position in axial direction, described outer ring 2, thereby the center cross-sectional 8 of described outer ring 2 also is divided into the first radial permanent magnet body 3 with respect to this center cross-sectional 8 two parts symmetrical.According to this structure, under the non-bearing state, the first radial permanent magnet body 3 that is arranged in neutral position in axial direction, outer ring 2 also is positioned at the neutral position of outer ring 2 in the axial direction.Therefore, utilize magnetic attracting force, the first radial permanent magnet body 3 also can play the effect to inner ring 1 location in the axial direction, thereby is guaranteeing that to a greater extent inner ring 1 is in correct position in the axial direction.
Preferably, the thickness d 3 of the described first radial permanent magnet body 3 be described outer ring 2 thickness 1/3 to 2/3, the thickness of the described first radial permanent magnet body 32 axial directions along the outer ring equates with described inner ring 1 thickness in axial direction, as shown in Figure 7.Further preferably, the thickness d 3 of the described first radial permanent magnet body 3 be described outer ring 2 thickness 1/2.Equate with described inner ring 1 thickness in axial direction by the thickness that makes the first radial permanent magnet body 3,2 axial directions along the outer ring, can make inner ring 1 obtain stable magnetic attracting force, thereby help guaranteeing that inner ring 1 is in steady state in radial direction and/or axial direction.
More than the setting and the effect thereof of the first radial permanent magnet body 3 of permanent-magnet suspension bearing of the present utility model described in detail.Below axial permanent magnetic body 4 is described in detail.
The number of axial permanent magnetic body 4 is a plurality of.But preferably, for the assembling of easy axial permanent magnetic body 4 with outer ring 2, axial permanent magnetic body 4 is two, and one of them axial permanent magnetic body 4 is positioned on the end face 6 of outer ring 2, and another axial permanent magnetic body 4 is positioned on the other end 7 of outer ring 2.
Laying respectively at the magnetic force that two groups of axial permanent magnetic bodies 4 on two end faces of outer ring 2 act on the inner ring 1 is repulsion, this a pair of repulsion equal and opposite in direction, direction in the axial direction is opposite, thereby to make a concerted effort in the axial direction be zero, thereby can guarantee in the axial direction stable of inner ring 1.The geometrical shape of axial permanent magnetic body 4 does not have specific (special) requirements, as long as can realize axially stablizing inner ring 1.
The axial permanent magnetic body 4 that is positioned on the first end end face can be for a plurality of, the axial permanent magnetic body 4 that is positioned on the second end end face also can be for a plurality of, the number that is positioned at the axial permanent magnetic body 4 on the first end end face can be different with the number of axial permanent magnetic body 4 on being positioned at the second end end face, as long as can realize that it is zero that repulsion that inner ring 1 is subjected to is in the axial direction made a concerted effort.
Preferably, described axial permanent magnetic body 4 is a ring segment shape body, and the central axis of this ring segment shape body (i.e. the central axis of the periphery at the interior or external peripheral surface place of this ring segment shape body) is identical with the central axis of described outer ring 2.Thereby, the inner circumferential surface and the external peripheral surface of inner circumferential surface, external peripheral surface and the outer ring 2 of the ring segment shape body of axial permanent magnetic body 4 have common central axis, thereby make the setting of outer ring 2 can not have influence on being connected of inner ring 1 and load (as axle) and rotatablely move.Here, the ring segment shape body structure of the ring segment shape body of axial permanent magnetic body 4 and the above-mentioned first radial permanent magnet body 3 is similar, thereby no longer describes in detail.
Preferably, for the ease of the installation of outer ring 2, the external peripheral surface of the ring segment shape body of described axial permanent magnetic body 4 aligns with the external peripheral surface of described outer ring 2, as shown in Figure 2.
Preferably, in order to make 4 pairs of inner rings 1 of axial permanent magnetic body apply desirable repulsion, the ring segment shape body of described axial permanent magnetic body 4 along the width w4 (as shown in Figure 2) of described outer ring 2 radial direction greater than described outer ring 2 width radially, thereby the inner circumferential surface that makes axial permanent magnetic body 4 protrudes in the inner circumferential surface of outer ring 2, so that axial permanent magnetic body 4 is more approaching with the position of inner ring 1, to obtain desirable magnetic repulsion force.
And axial permanent magnetic body 4 is less than or equal to internal diameter poor of the internal diameter of described outer ring 2 and described inner ring 1 along the difference of the width w4 of described outer ring 2 radial direction and described outer ring 2 width radially.Thereby when under loaded state, the axial permanent magnetic body 4 that protrudes in the inner circumferential surface of outer ring 2 can not cause interference with the axle that is connected with this inner ring 1 to inner ring 1.
Preferably, described axial permanent magnetic body 4 along the width w4 of described outer ring 2 radial direction be described inner ring 1 width radially 1.5-2.5 doubly.Further preferably, described axial permanent magnetic body 4 is 2 times of described inner ring 1 width radially along the width of described outer ring 2 radial direction.Except above-mentioned advantage, make the width of the width w4 of axial permanent magnetic body 4 greater than inner ring 1, can either realize inner ring 1 stress balance in the axial direction, and, the repulsion of 4 pairs of inner rings 1 of two groups of axial permanent magnetic bodies of inner ring 1 both sides also can produce with joint efforts in the radial direction, and this bigger radial load of inner ring 1 carrying of making a concerted effort to help to make.
The mounting point of axial permanent magnetic body 4 on outer ring 2 gets final product inner ring 1 being played axial stabilization, do not have specific (special) requirements.
Preferably, as shown in Figure 6, axial permanent magnetic body 4 in the position and the relativeness of the first radial permanent magnet body 3 in the position on the outer ring 2 of outer ring 2 is: in the orthographic projection view of this permanent-magnet suspension bearing axial direction, the inner circumferential surface of the described first radial permanent magnet body 3 be projected as first arc 11, the inner circumferential surface of described axial permanent magnetic body 4 be projected as second arc 12, this first arc 11 and second arc 12 are with respect to the line L bilateral symmetry in Fig. 6 between the mid point of the mid point of described first arc 11 and second arc 12, and the opening of described first arc 11 and second arc 12 toward each other.
Preferably, the central angle alpha of first arc 11 be 60 the degree to 100 the degree, further preferably, be 90 the degree.
According to this structure, the direction of the magnetic attraction of 3 pairs of inner rings 1 of the first radial permanent magnet body is mainly along vectorial OC direction (making progress in Fig. 6), and the repulsion of 4 pairs of inner rings 1 of axial permanent magnetic body making a concerted effort in the axial direction is zero, and the repulsion of 4 pairs of inner rings 1 of axial permanent magnetic body will be mainly along vectorial DC direction in making a concerted effort in the radial direction.That is to say that the repulsion of 4 pairs of inner rings 1 of axial permanent magnetic body is identical in the direction of the magnetic attraction of in the radial direction 3 pairs of inner rings 1 of the direction of making a concerted effort and the first radial permanent magnet body.
In this case, if bear load (as axle is installed) on the inner ring 1, the repulsion that this load can be utilized 4 pairs of inner rings 1 of axial permanent magnetic body in the radial direction make a concerted effort and the magnetic attraction of 3 pairs of inner rings 1 of the first radial permanent magnet body together supports, thereby the permanent-magnet suspension bearing that the utility model is provided can be applicable in the operating conditions of bigger load.
Preferably, the central angle of described second arc 12 (the central angle β shown in Fig. 6) is that 160 degree are to 200 degree.Further preferably, the central angle of described second arc 12 is 180 degree, thereby can make inner ring 1 obtain more stable state of equilibrium in the axial direction.
In order further to improve the bearing capacity of permanent-magnet suspension bearing of the present utility model, preferably, described permanent-magnet suspension bearing also comprises the second radial permanent magnet body (not shown), this second radial permanent magnet body embeds in the described outer ring 2, and this second radial permanent magnet body and the described first radial permanent magnet body 3 are with respect to the central axis symmetry of described outer ring 2, and this second radial permanent magnet body and described inner ring 1 magnetic force repel each other.
Because the second radial permanent magnet body and the described first radial permanent magnet body 3 are with respect to the central axis symmetry of described outer ring 2, this second radial permanent magnet body and described inner ring 1 magnetic force repel each other, thereby, this second radial permanent magnet body is identical to the resultant direction of the magnetic attraction of inner ring 1 with the first radial permanent magnet body to the resultant direction of the magnetic repulsion force of inner ring 1, thereby can allow the bigger load of inner ring 1 carrying.
Preferably, in the situation that is provided with the second radial permanent magnet body, outer ring 2 also can be made by magnetic conductive material.The outer ring 2 that utilizes this magnetic conductive material to make can make the magnetic action power between inner ring 1 and radial permanent magnet body 3 and the axial permanent magnetic body 4 bigger, thereby makes inner ring 1 more firm in the axial direction, can carry bigger load in the radial direction.
As mentioned above, magnetic is inhaled mutually between the first radial permanent magnet body 3 and the inner ring 1, and inner ring 1 and axial permanent magnetic body 4 are for repelling each other, and this can realize by being provided with of magnetic pole of each magnet.
Preferably, the pole orientation of described inner ring, the first radial permanent magnet body 3 and axial permanent magnetic body 4 (promptly in magnet, the N utmost point points to the direction of the S utmost point or the direction that the S utmost point points to the N utmost point) is the axial direction along described outer ring 2.
Specifically, be that example is described with the orientation among Fig. 2 and Fig. 7.In the axial direction, the left end of inner ring 1 is the N utmost point, and right-hand member is the S utmost point; The left end of the first radial permanent magnet body 3 is the S utmost point, and right-hand member is the N utmost point; For the axial permanent magnetic body 4 in 2 left sides, outer ring, left end is the S utmost point, and right-hand member is the N utmost point; For the axial permanent magnetic body 4 on 2 right sides, outer ring, left end is the S utmost point, and right-hand member is the N utmost point.Certainly, also be fully feasible with each magnets N utmost point and S umpolung among Fig. 7 (the N utmost point that is about among Fig. 7 is made as the S utmost point, and the S utmost point among Fig. 7 is made as the N utmost point).
In addition, for traditional permanent-magnet suspension bearing, in the permanent-magnet suspension bearing provided by the utility model, axial permanent magnetic body 4 is fixed together with outer ring 2 (as by adhesives together), the first radial permanent magnet body 3 is fixed together with outer ring 2 with embedding, therefore the inner ring 1 within outer ring 2, remaining parts is fixedly connected as integral body.Therefore, permanent-magnet suspension bearing of the present utility model is an integrated form, and structure is very compact, and assembly process is also comparatively easy.
At different applications, can select to produce permanent magnet, first (the second) the radial permanent magnet body and the axial permanent magnetic body of different magnetic intensities.
More than described the critical piece and the principle thereof of permanent-magnet suspension bearing provided by the utility model, below permanent magnetic suspending shaft bearing assembly provided by the utility model has been described.
Permanent magnetic suspending shaft bearing assembly provided by the utility model comprises at least one above-mentioned permanent-magnet suspension bearing provided by the utility model, and above technical characteristics about permanent-magnet suspension bearing can be combined in the permanent-magnet suspension bearing of permanent magnetic suspending shaft bearing assembly in any suitable manner individually and/or in combination.
Preferably, this permanent magnetic suspending shaft bearing assembly comprises discoidal housing and an above-mentioned permanent-magnet suspension bearing, a described permanent-magnet suspension bearing is positioned at this housing, this housing has the hole of running through the wall of this housing along the central axis of described permanent-magnet suspension bearing, and the diameter in this hole is not less than the diameter of barrel surface at the inner circumferential surface place of described axial permanent magnetic body 4.In use, the axle that inner ring 1 will support can enter by the hole of housing in the permanent magnetic suspending shaft bearing assembly, to cooperate with inner ring 1.
Perhaps, this permanent magnetic suspending shaft bearing assembly comprises at least two above-mentioned permanent-magnet suspension bearings, the outer ring of each permanent-magnet suspension bearing has identical central axis, wherein, and the axial permanent magnetic body between the inner ring of any two shared these two adjacent permanent-magnet suspension bearings of adjacent permanent-magnet suspension bearing.
Have under the situation of at least two above-mentioned permanent-magnet suspension bearings at described permanent magnetic suspending shaft bearing assembly, each permanent-magnet suspension bearing is identical, be the parts (parameters such as shape, size) and the arrangement mode thereof of each permanent-magnet suspension bearing, and the arrangement mode of magnetic pole all is identical, for example shown in Figure 8.The outer ring of each permanent-magnet suspension bearing has identical central axis, wherein, and the axial permanent magnetic body between the inner ring of any two shared these two adjacent permanent-magnet suspension bearings of adjacent permanent-magnet suspension bearing.For example, as shown in Figure 8, this permanent magnetic suspending shaft bearing assembly comprises two permanent-magnet suspension bearings, the axial permanent magnetic body 4 (4 ') of these two shared centres of permanent-magnet suspension bearing.
When the permanent magnetic suspending shaft bearing assembly comprises permanent-magnet suspension bearing more than 3 or 3, (one group) the axial permanent magnetic body between the inner ring 1 of any two adjacent all shared these two adjacent permanent-magnet suspension bearings of permanent magnet suspension axle bush.
Utilize permanent magnetic suspending shaft bearing assembly provided by the utility model, a plurality of permanent-magnet suspension bearings can be together in series, thereby carry by each inner ring 1 of a plurality of permanent-magnet suspension bearings.Obviously, compare, can carry bigger load with single permanent-magnet suspension bearing.
The outer ring 2 of each permanent-magnet suspension bearing can be independent parts, but preferably, the outer ring 2 of each permanent-magnet suspension bearing connects as one parts, thereby forms an integral body.
Preferably, described permanent magnetic suspending shaft bearing assembly also comprises discoidal housing, described permanent-magnet suspension bearing is positioned at this housing, described housing has along the extension of central axis of the external peripheral surface of described housing and runs through the hole of the wall of this housing, and the diameter in this hole is not less than the diameter (diameter of a circles at second arc, 12 places as shown in Figure 6) of barrel surface at the inner circumferential surface place of described axial permanent magnetic body 4.
Utilize this housing, can protect each parts of permanent-magnet suspension bearing effectively.And the diameter that runs through the hole of housing is not less than the diameter of barrel surface at the inner circumferential surface place of axial permanent magnetic body 4, thereby is convenient to being connected of inner ring 1 and the load axle of inner ring 1 (as pass).
This housing generally includes the two-part that removably link together.Outer ring 2 is fixedly mounted in the cavity of housing, and make the hole of running through housing and the inner circumferential surface of outer ring 2 have common central axis, so that this permanent-magnet suspension bearing after carrying, makes the rotating center of axle of the carrying of inner ring 1 also remain on substantially on the central axis of inner circumferential surface of outer ring 2.
Preferably, the contiguous on every side parts or the operation of device are influenced to some extent in the workplace for fear of the magnetic field that the first radial permanent magnet body 3, inner ring 1 and axial permanent magnetic body 4 are produced, preferably, described housing is made by permeability magnetic material, thereby the magnetic field shielding of described permanent-magnet suspension bearing is got up.
In order to improve the adaptability of permanent-magnet suspension bearing, with the load in can carrying on a large scale, preferably, described permanent magnetic suspending shaft bearing assembly also comprises auxiliary bearing, this auxiliary bearing is installed in the hole of described housing, and the rotating center axis of the rotary component of this auxiliary bearing and the central axis of described outer ring 2 are same axis.
This auxiliary bearing can be used for supporting the load of the axle that passes inner ring 1 equally.Concrete analysis to auxiliary bearing is as follows:
The suction of the first radial permanent magnet body 3 that is subjected to when the load and the inner ring 1 of inner ring 1 carrying, the repulsion (if any) of the second radial permanent magnet body, and the repulsion of axial permanent magnetic body 4 is the making a concerted effort during balance of radial direction when making a concerted effort to be zero with the vertically prone gravity of the load that is subjected to (inner ring 1 is subjected to magnetive attraction that vertical ground makes progress), and inner ring 1 is positioned at the central position of outer ring 2.In this case, auxiliary bearing need not the axle that passes inner ring 1 is supported;
And the suction of the first radial permanent magnet body 3 that is subjected to when the load and the inner ring 1 of inner ring 1 carrying, the repulsion (if any) of the second radial permanent magnet body, and the repulsion of axial permanent magnetic body 4 the making a concerted effort when uneven of radial direction (as, when inner ring 1 is subjected to magnetive attraction that vertical ground makes progress and is greater than or less than the vertically prone gravity of the load that is subjected to), then auxiliary bearing can play the effect of supplemental support to the axle that passes inner ring 1, thereby has enlarged the Applicable scope of permanent-magnet suspension bearing of the present utility model.
Housing that uses in comprising the permanent magnetic suspending shaft bearing assembly of a plurality of permanent-magnet suspension bearings as described herein and auxiliary bearing all can be used for comprising in the permanent magnetic suspending shaft bearing assembly of a permanent-magnet suspension bearing.
By above description as can be known, in permanent-magnet suspension bearing provided by the utility model, the control that utilizes the first radial permanent magnet body 3 (with the second radial permanent magnet body), axial permanent magnetic body 4 to realize to inner ring 1: when the non-bearing state, inner ring 1 be subjected to radial direction magnetic action power and at the center that deviates from outer ring 2 in the radial direction; And when loaded state, just the magnetic action power that can utilize inner ring 1 to be subjected to is born the load that inner ring 1 is carried, and when magnetic action equilibrium of forces that this load and inner ring 1 are subjected to, inner ring 1 is positioned at the central position of outer ring 2, and be in state of suspension, thereby can realize the frictionless rotation.The magnetic action power that is subjected to when inner ring 1 also can utilize auxiliary bearing to play the supplemental support effect when bearing the laod unbalance that inner ring 1 carried, and can realize very little the rotatablely moving that rub, and can be applicable to load in a big way.
And in the axial direction, no matter be non-loaded state or at loaded state, inner ring 1 all is in steady state under the control of the magnetic action power of axial permanent magnetic body 4.Permanent-magnet suspension bearing provided by the utility model and permanent magnetic suspending shaft bearing assembly use in the state of laterally placing usually, and promptly the axial direction of outer ring 2 is parallel with the horizontal plane direction.
More than permanent magnetic suspending shaft bearing assembly provided by the utility model is described in detail.Those skilled in the art it is also to be understood that the content that the utility model comprised is not limited thereto, and under the prerequisite that does not break away from the utility model essential scope, can make various modifications, replacement and variation.
Claims (18)
1. a permanent-magnet suspension bearing is characterized in that, this permanent-magnet suspension bearing comprises:
Inner ring (1), this inner ring (1) is a permanent magnet;
Outer ring (2), described inner ring (1) is enclosed within this outer ring (2), described inner ring (1) along the thickness of described outer ring (2) axial direction less than described outer ring (2) thickness in axial direction, the external diameter of described inner ring (1) is less than the internal diameter of described outer ring (2), and this outer ring (2) are made by the non-magnetic material;
The first radial permanent magnet body (3), this first radial permanent magnet body (3) embeds in the described outer ring (2), and magnetic force is inhaled mutually between this first radial permanent magnet body (3) and the described inner ring (1);
A plurality of axial permanent magnetic bodies (4), at least one axial permanent magnetic body (4) is fixed on the end face (6) of described outer ring (2) first end in axial direction, at least one axial permanent magnetic body (4) is fixed on the end face (7) of described outer ring (2) second end in axial direction, and the repulsion that described inner ring (1) is positioned at the axial permanent magnetic body (4) on the repulsion of the axial permanent magnetic body (4) on the end face (6) of described first end and the end face (7) that described inner ring (1) is positioned at described second end making a concerted effort in the axial direction is zero.
2. permanent-magnet suspension bearing according to claim 1, it is characterized in that, the described first radial permanent magnet body (3) is a ring segment shape body, the described first radial permanent magnet body (3) is identical with described outer ring (2) width radially along the width of described outer ring (2) radial direction, and the inner circumferential surface of the ring segment shape body of the described first radial permanent magnet body (3) aligns with the inner circumferential surface of described outer ring (2).
3. permanent-magnet suspension bearing according to claim 2, it is characterized in that, the described first radial permanent magnet body (3) is 1/3 to 2/3 of described outer ring (a 2) thickness in axial direction along the thickness of described outer ring (2) axial direction, and the described first radial permanent magnet body (3) equates with the thickness of described inner ring (1) along described outer ring (2) axial direction along the thickness of described outer ring (2) axial direction.
4. permanent-magnet suspension bearing according to claim 3 is characterized in that, the number of described axial permanent magnetic body (4) is two.
5. permanent-magnet suspension bearing according to claim 4 is characterized in that, described axial permanent magnetic body (4) is a ring segment shape body, and the central axis of the ring segment shape body of this axial permanent magnetic body (4) is identical with the central axis of described outer ring (2).
6. permanent-magnet suspension bearing according to claim 5, it is characterized in that, greater than described outer ring (2) width radially, and described axial permanent magnetic body (4) is less than or equal to internal diameter poor of the internal diameter of described outer ring (2) and described inner ring (1) to described axial permanent magnetic body (4) along the difference of the width of described outer ring (2) radial direction and described outer ring (2) width radially along the width of described outer ring (2) radial direction.
7. permanent-magnet suspension bearing according to claim 6 is characterized in that, described axial permanent magnetic body (4) along the width of described outer ring (2) radial direction be described inner ring (1) width radially 1.5-2.5 doubly.
8. permanent-magnet suspension bearing according to claim 6, it is characterized in that, in the orthographic projection view of this permanent-magnet suspension bearing axial direction, the inner circumferential surface of the described first radial permanent magnet body (3) be projected as first arc (11), the inner circumferential surface of described axial permanent magnetic body (4) be projected as second arc (12), this first arc (11) and second arc (12) are with respect to the line symmetry between the mid point of the mid point of described first arc (11) and second arc (12), and the opening of described first arc (11) and second arc (12) toward each other.
9. permanent-magnet suspension bearing according to claim 8 is characterized in that, the central angle of described second arc is that 160 degree are to 200 degree.
10. permanent-magnet suspension bearing according to claim 9 is characterized in that, the central angle of described first arc is 60 to 100 degree.
11. permanent-magnet suspension bearing according to claim 8, it is characterized in that, this permanent-magnet suspension bearing also comprises the second radial permanent magnet body, this second radial permanent magnet body embeds in the described outer ring (2), and this second radial permanent magnet body and the described first radial permanent magnet body (3) are with respect to the central axis symmetry of described outer ring (2), and this second radial permanent magnet body and described inner ring (1) magnetic force repel each other.
12., it is characterized in that the pole orientation of described inner ring, the first radial permanent magnet body (3) and axial permanent magnetic body (4) is the axial direction along described outer ring (2) according to any described permanent-magnet suspension bearing among the claim 1-11.
13. permanent magnetic suspending shaft bearing assembly, it is characterized in that, this permanent magnetic suspending shaft bearing assembly comprises any described permanent-magnet suspension bearing among discoidal housing and the claim 1-12, a described permanent-magnet suspension bearing is positioned at this housing, this housing has the hole of running through the wall of this housing along the central axis of described permanent-magnet suspension bearing, and the diameter in this hole is not less than the diameter of barrel surface at the inner circumferential surface place of described axial permanent magnetic body (4).
14. permanent magnetic suspending shaft bearing assembly, it is characterized in that, this permanent magnetic suspending shaft bearing assembly comprises any described permanent-magnet suspension bearing among at least two claim 1-12, the outer ring of each permanent-magnet suspension bearing has identical central axis, wherein, the axial permanent magnetic body between the inner ring of any two shared these two adjacent permanent-magnet suspension bearings of adjacent permanent-magnet suspension bearing.
15. permanent magnetic suspending shaft bearing assembly according to claim 14 is characterized in that the outer ring of each permanent-magnet suspension bearing connects as one parts.
16. permanent magnetic suspending shaft bearing assembly according to claim 14, it is characterized in that, this permanent magnetic suspending shaft bearing assembly also comprises discoidal housing, described permanent-magnet suspension bearing is positioned at this housing, this housing has the hole of running through the wall of this housing along the central axis of described permanent-magnet suspension bearing, and the diameter in this hole is not less than the diameter of barrel surface at the inner circumferential surface place of described axial permanent magnetic body (4).
17. permanent magnetic suspending shaft bearing assembly according to claim 14 is characterized in that described housing is made by permeability magnetic material.
18. permanent magnetic suspending shaft bearing assembly according to claim 14 is characterized in that, described permanent magnetic suspending shaft bearing assembly also comprises auxiliary bearing, and this auxiliary bearing is installed in the hole of described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202206554U CN201531526U (en) | 2009-10-30 | 2009-10-30 | Permanentmagnet suspension bearing and permanentmagnet suspension bearing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202206554U CN201531526U (en) | 2009-10-30 | 2009-10-30 | Permanentmagnet suspension bearing and permanentmagnet suspension bearing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531526U true CN201531526U (en) | 2010-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202206554U Expired - Fee Related CN201531526U (en) | 2009-10-30 | 2009-10-30 | Permanentmagnet suspension bearing and permanentmagnet suspension bearing assembly |
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| CN (1) | CN201531526U (en) |
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| CN101979888A (en) * | 2010-10-06 | 2011-02-23 | 潘家烺 | Permanent magnetic energy suspension bearing capable of being combined with common rotating shaft bearing to eliminate bearing capacity |
| WO2011050736A1 (en) * | 2009-10-30 | 2011-05-05 | 张思维 | Permanent magnetic levitating bearing and permanent magnetic levitating bearing assembly |
| CN102588434A (en) * | 2011-01-11 | 2012-07-18 | 张平 | Permanent magnet suspension bearing and installation structure thereof |
| CN102588433A (en) * | 2011-01-11 | 2012-07-18 | 张平 | Permanent magnet suspension bearing and installation structure thereof |
| PL423034A1 (en) * | 2017-10-02 | 2019-04-08 | Artur Łukasiewicz | Magnetic bearing |
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2009
- 2009-10-30 CN CN2009202206554U patent/CN201531526U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011050736A1 (en) * | 2009-10-30 | 2011-05-05 | 张思维 | Permanent magnetic levitating bearing and permanent magnetic levitating bearing assembly |
| CN102052402B (en) * | 2009-10-30 | 2013-06-19 | 张平 | Permanent magnet suspension bearing and permanent magnet suspension bearing component |
| CN101979888A (en) * | 2010-10-06 | 2011-02-23 | 潘家烺 | Permanent magnetic energy suspension bearing capable of being combined with common rotating shaft bearing to eliminate bearing capacity |
| CN101979888B (en) * | 2010-10-06 | 2012-12-05 | 潘家烺 | Permanent magnetic energy suspension bearing capable of being combined with common rotating shaft bearing to eliminate bearing capacity |
| CN102588434A (en) * | 2011-01-11 | 2012-07-18 | 张平 | Permanent magnet suspension bearing and installation structure thereof |
| CN102588433A (en) * | 2011-01-11 | 2012-07-18 | 张平 | Permanent magnet suspension bearing and installation structure thereof |
| WO2012094836A1 (en) * | 2011-01-11 | 2012-07-19 | 关家树 | Permanent magnetic suspension bearing and installation structure thereof |
| WO2012094837A1 (en) * | 2011-01-11 | 2012-07-19 | 关家树 | Permanent magnetic suspension bearing and installation structure thereof |
| CN102588434B (en) * | 2011-01-11 | 2016-06-01 | 北京京冶永磁悬浮轴承有限公司 | A kind of permanent-magnet suspension bearing and mounting structure thereof |
| CN102588433B (en) * | 2011-01-11 | 2016-08-17 | 北京京冶永磁悬浮轴承有限公司 | A kind of permanent-magnet suspension bearing and mounting structure thereof |
| PL423034A1 (en) * | 2017-10-02 | 2019-04-08 | Artur Łukasiewicz | Magnetic bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20121030 |