CN113700737A - Protection bearing seat and protection bearing mounting structure of magnetic suspension bearing - Google Patents
Protection bearing seat and protection bearing mounting structure of magnetic suspension bearing Download PDFInfo
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- CN113700737A CN113700737A CN202110736963.8A CN202110736963A CN113700737A CN 113700737 A CN113700737 A CN 113700737A CN 202110736963 A CN202110736963 A CN 202110736963A CN 113700737 A CN113700737 A CN 113700737A
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- bearing
- protective
- mounting hole
- elastic
- elastic cantilever
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- 239000000725 suspension Substances 0.000 title claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 92
- 239000000463 material Substances 0.000 claims description 9
- 210000004907 gland Anatomy 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 1
- 230000003139 buffering effect Effects 0.000 abstract description 9
- 238000003754 machining Methods 0.000 abstract description 2
- 238000013016 damping Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/06—Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
Abstract
The invention relates to a protective bearing seat of a magnetic suspension bearing and a protective bearing mounting structure. Protection bearing frame of magnetic suspension bearing includes: the bearing mounting hole is used for providing a mounting space for protecting the bearing; the hole wall of the bearing mounting hole is provided with an elastic cantilever, or an annular buffer part is fixed in the bearing mounting hole and provided with the elastic cantilever; the elastic cantilevers are uniformly distributed around the axis of the bearing mounting hole; each elastic cantilever is radially inclined and cantilevered relative to the bearing mounting hole, a bearing supporting part used for supporting the outer circumferential surface of the outer ring of the protective bearing is arranged on each elastic cantilever, and a space is reserved between each bearing supporting part and the root of each elastic cantilever and used for enabling each elastic cantilever to bend and deform when being pressed by the protective bearing so as to buffer the protective bearing. According to the scheme, different buffering requirements can be flexibly met, the structure universality is stronger, the machining precision and the structure uniformity can be better guaranteed, so that the positioning precision is improved, the nonlinear characteristic is small, and the assembly is convenient.
Description
Technical Field
The invention relates to a protective bearing seat of a magnetic suspension bearing and a protective bearing mounting structure.
Background
The protective bearing of a magnetic suspension bearing (hereinafter referred to as "magnetic bearing") is a mechanical boundary where a stator and a rotor touch when the support of the magnetic bearing does not work or fails due to some reason, and is an additional set of passive bearing, and a large number of precise angular contact ball bearings, deep groove ball bearings and the like are usually adopted.
When a magnetic bearing device operating under a rated working condition fails, a protective bearing in the device should be able to withstand a rotor drop at full speed, support the rotor for a limited time until the normal operating condition is restored, or until the speed is safely reduced. A large amount of practices and theoretical analysis show that the protective bearing of the magnetic bearing can be greatly impacted when the rotor falls, impact load can be transmitted to the outer ring and the protective bearing seat through the inner ring and the balls of the protective bearing, the service life of the protective bearing can be greatly shortened when the impact load is overlarge, and even the protective bearing can be directly failed. In addition, the rotor may generate severe whirling motion due to an air gap existing between the rotor and the protection bearing after the rotor is dropped. In order to alleviate the above-mentioned problem, it is generally considered to add a tolerance ring between the protective bearing outer ring and the bearing seat, such as the tolerance ring used in the protective bearing assembly of the magnetic bearing in the patent document with the publication number CN110259824B, which is a steel elastic element with a wave-shaped protrusion on the surface and a high rigidity, and can play a good role to some extent.
However, because tolerance rings are typically stamped from thin spring steel sheets, they have several disadvantages to use. Firstly, limited by structural space and product type spectrum, the margin for adjusting rigidity and damping characteristics is small, so that the damping device can only play a role in a limited interval; secondly, the tolerance ring has low positioning precision, especially near the seam formed when the ring is formed; thirdly, due to the corrugated structure, the rigidity and the damping provided by the tolerance ring have strong nonlinearity and are directly related to the pretightening force, and in order to obtain higher initial rigidity, higher prepressing force is required to be used during installation, so that the assembly difficulty is increased; finally, when the drop impact is large, the protrusions of the tolerance ring are also susceptible to permanent deformation after being squeezed, thereby further affecting the positioning accuracy of the protective bearing.
Disclosure of Invention
The invention aims to provide a protective bearing seat of a magnetic suspension bearing and a protective bearing mounting structure, which solve at least one of the defects of the buffering mode in the prior art.
The protection bearing seat of the magnetic suspension bearing adopts the following technical scheme:
protection bearing frame of magnetic suspension bearing includes:
the bearing mounting hole is used for providing a mounting space for protecting the bearing;
the hole wall of the bearing mounting hole is provided with an elastic cantilever, or an annular buffer part is fixed in the bearing mounting hole and provided with the elastic cantilever;
the elastic cantilevers are uniformly distributed around the axis of the bearing mounting hole;
each elastic cantilever is radially inclined and cantilevered relative to the bearing mounting hole, a bearing supporting part used for supporting the outer circumferential surface of the outer ring of the protective bearing is arranged on each elastic cantilever, and a space is reserved between each bearing supporting part and the root of each elastic cantilever and used for enabling each elastic cantilever to bend and deform when being pressed by the protective bearing so as to buffer the protective bearing.
Has the advantages that: by adopting the technical scheme, the shape and/or parameters of the elastic cantilever on the hole wall of the bearing mounting hole or the annular buffer piece can be adjusted flexibly, so that different buffering requirements are met, and the structural universality is stronger; compared with a tolerance ring processed into an annular shape, the processing precision and the structural uniformity can be better ensured, so that the positioning precision is improved; in addition, the elastic cantilever provides a buffering force by means of self bending deformation, the nonlinear characteristic is small, and the linear buffering requirement can be better met; meanwhile, the elastic cantilever can form higher initial rigidity by depending on the elastic cantilever, so that higher pre-pressing force is avoided, the assembly is convenient, larger impact can be borne, and excessive deformation is avoided.
As a preferred technical scheme: and the bearing support part is provided with a support surface for supporting the outer ring peripheral surface of the protective bearing, and the support surface is a plane.
Has the advantages that: by adopting the technical scheme, the elastic cantilever can be supported by the protective bearing when being bent and deformed under the stress.
As a preferred technical scheme: the bearing support part is folded towards the radial outer side of the bearing mounting hole compared with the part of the elastic cantilever, which is positioned on one side of the bearing support part close to the root part of the elastic cantilever.
Has the advantages that: by adopting the technical scheme, the acting force of the protective bearing received by the elastic cantilever can be enabled to be along the radial direction of the bearing mounting hole or close to the radial direction of the bearing mounting hole, and the support is more stable.
As a preferred technical scheme: the part of the elastic cantilever, which is positioned at the bearing supporting part and close to the root part, is a connecting part, and the connecting part is arc-shaped and protrudes to the outer side of the bearing mounting hole.
Has the advantages that: by adopting the technical scheme, the rigidity of the elastic cantilever is improved.
As a preferred technical scheme: two elastic cantilevers adjacent in the circumferential direction have an overlap in the bearing mounting aperture direction.
Has the advantages that: by adopting the technical scheme, more elastic cantilevers can be arranged, and the supporting uniformity is improved.
As a preferred technical scheme: the bearing support part is arranged at the outermost end of the elastic cantilever.
Has the advantages that: by adopting the technical scheme, the length of the elastic cantilever can be fully increased, and the weight can be reduced and the number of the elastic cantilevers can be increased.
As a preferred technical scheme: a groove is formed between two adjacent elastic cantilevers, and an elastic filling material is arranged in the groove and used for generating elastic compression deformation when being pressed by the elastic cantilevers.
Has the advantages that: by adopting the technical scheme, the damping effect of the vortex motion of the protective bearing can be improved, and the protective effect is better played.
As a preferred technical scheme: the elastic filling material is any one of rubber and resin.
As a preferred technical scheme: the protection bearing seat includes:
a seat main body, the bearing mounting hole being provided on the seat main body;
and the gland is fastened and fixed at the end part of the corresponding end of the bearing mounting hole and is used for axially positioning the protective bearing.
Has the advantages that: by adopting the technical scheme, the protective bearing is convenient to assemble and axially position, and the structure is compact.
The protective bearing mounting structure of the magnetic suspension bearing adopts the following technical scheme:
a protective bearing mounting structure for a magnetic suspension bearing, comprising:
the protective bearing seat is provided with a protective bearing;
the protection bearing frame of magnetic suspension bearing includes:
the bearing mounting hole is used for providing a mounting space for protecting the bearing;
the hole wall of the bearing mounting hole is provided with an elastic cantilever, or an annular buffer part is fixed in the bearing mounting hole and provided with the elastic cantilever;
the elastic cantilevers are uniformly distributed around the axis of the bearing mounting hole;
each elastic cantilever is radially inclined and cantilevered relative to the bearing mounting hole, a bearing supporting part used for supporting the outer circumferential surface of the outer ring of the protective bearing is arranged on each elastic cantilever, and a space is reserved between each bearing supporting part and the root of each elastic cantilever and used for enabling each elastic cantilever to bend and deform when being pressed by the protective bearing so as to buffer the protective bearing.
Has the advantages that: by adopting the technical scheme, the shape and/or parameters of the elastic cantilever on the hole wall of the bearing mounting hole or the annular buffer piece can be adjusted flexibly, so that different buffering requirements are met, and the structural universality is stronger; compared with a tolerance ring processed into an annular shape, the processing precision and the structural uniformity can be better ensured, so that the positioning precision is improved; in addition, the elastic cantilever provides a buffering force by means of self bending deformation, the nonlinear characteristic is small, and the linear buffering requirement can be better met; meanwhile, the elastic cantilever can form higher initial rigidity by depending on the elastic cantilever, so that higher pre-pressing force is avoided, the assembly is convenient, larger impact can be borne, and excessive deformation is avoided.
As a preferred technical scheme: and the bearing support part is provided with a support surface for supporting the outer ring peripheral surface of the protective bearing, and the support surface is a plane.
Has the advantages that: by adopting the technical scheme, the elastic cantilever can be supported by the protective bearing when being bent and deformed under the stress.
As a preferred technical scheme: the bearing support part is folded towards the radial outer side of the bearing mounting hole compared with the part of the elastic cantilever, which is positioned on one side of the bearing support part close to the root part of the elastic cantilever.
Has the advantages that: by adopting the technical scheme, the acting force of the protective bearing received by the elastic cantilever can be enabled to be along the radial direction of the bearing mounting hole or close to the radial direction of the bearing mounting hole, and the support is more stable.
As a preferred technical scheme: the part of the elastic cantilever, which is positioned at the bearing supporting part and close to the root part, is a connecting part, and the connecting part is arc-shaped and protrudes to the outer side of the bearing mounting hole.
Has the advantages that: by adopting the technical scheme, the rigidity of the elastic cantilever is improved.
As a preferred technical scheme: two elastic cantilevers adjacent in the circumferential direction have an overlap in the bearing mounting aperture direction.
Has the advantages that: by adopting the technical scheme, more elastic cantilevers can be arranged, and the supporting uniformity is improved.
As a preferred technical scheme: the bearing support part is arranged at the outermost end of the elastic cantilever.
Has the advantages that: by adopting the technical scheme, the length of the elastic cantilever can be fully increased, and the weight can be reduced and the number of the elastic cantilevers can be increased.
As a preferred technical scheme: a groove is formed between two adjacent elastic cantilevers, and an elastic filling material is arranged in the groove and used for generating elastic compression deformation when being pressed by the elastic cantilevers.
Has the advantages that: by adopting the technical scheme, the damping effect of the vortex motion of the protective bearing can be improved, and the protective effect is better played.
As a preferred technical scheme: the elastic filling material is any one of rubber and resin.
As a preferred technical scheme: the protection bearing seat includes:
a seat main body, the bearing mounting hole being provided on the seat main body;
and the gland is fastened and fixed at the end part of the corresponding end of the bearing mounting hole and is used for axially positioning the protective bearing.
Has the advantages that: by adopting the technical scheme, the protective bearing is convenient to assemble and axially position, and the structure is compact.
Drawings
Fig. 1 is a perspective view of an embodiment 1 of a protective bearing mounting structure of a magnetic bearing in the present invention;
FIG. 2 is a perspective view of a seat body in a protective bearing seat of the magnetic bearing of FIG. 1;
the names of the components corresponding to the corresponding reference numerals in the drawings are: 11. a seat main body; 12. sinking a platform; 13. a bearing mounting hole; 14. a flexible cantilever; 15. a groove; 16. a bearing support portion; 17. a support surface; 18. a connecting portion; 21. a gland; 22. a screw; 31. and protecting the bearing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the protective bearing mounting structure of a magnetic bearing in the present invention:
as shown in fig. 1, the protective bearing mounting structure of the magnetic suspension bearing comprises a protective bearing seat, a protective bearing 31 is assembled on the protective bearing seat, and the protective bearing 31 in the embodiment is a double-row angular contact ball bearing.
The protection bearing seat of magnetic suspension bearing includes seat main part 11 and gland 21, and seat main part 11 is the disc structure, and the middle part is equipped with heavy platform 12, is equipped with bearing mounting hole 13 on the heavy platform 12 for provide installation space for protection bearing 31. The gland 21 is an annular pressure plate, is fastened to the end of the corresponding end of the bearing mounting hole 13, and is fixed on the end surface of the seat body 11 through a screw 22, so as to axially position the protection bearing 31 and provide the pre-tightening force required by the angular contact bearing. The seat main body 11 is further provided with fixing holes around the sinking platform 12 for realizing the connection between the seat main body 11 and other parts.
As shown in fig. 1 and fig. 2, the wall of the bearing mounting hole 13 is uniformly provided with elastic cantilevers 14, and a groove 15 is formed between adjacent elastic cantilevers 14. The elastic cantilevers 14 are manufactured by milling, so that the machining precision can be better ensured, and the elastic cantilevers 14 can be used for uniformly supporting the protective bearing 31. Each of the elastic cantilevers 14 is obliquely cantilevered with respect to the radial direction of the bearing mounting hole 13, and can be bent and deformed when pressed by the protection bearing 31 to cushion the protection bearing 31. The resilient cantilever 14 includes a bearing support portion 16 and a connecting portion 18.
Specifically, the bearing support portion 16 is provided at the outermost end of the elastic cantilever 14, and is used for supporting the outer circumferential surface of the outer ring of the protective bearing 31, and has a distance from the root of the elastic cantilever 14; the support surface 17 of the bearing support portion 16 for supporting the outer circumferential surface of the outer ring of the protective bearing 31 is a flat surface, so that the force of the protective bearing 31 applied to the elastic cantilever 14 can be made to follow the radial direction of the bearing mounting hole 13 or approach the radial direction of the bearing mounting hole 13, and the support of the protective bearing 31 can be maintained when the elastic cantilever 14 is subjected to the force bending deformation.
The connecting portion 18 is connected between the bearing support portion 16 and the root portion of the elastic cantilever 14, has an arc-shaped structure, and protrudes outward of the bearing mounting hole 13. In order to improve the support uniformity of the protective bearing 31, two elastic cantilevers 14 adjacent in the circumferential direction have an overlap in the radial direction of the bearing mounting hole 13, and in the present embodiment, the entire bearing support portion 16 of any one elastic cantilever 14 has an overlap in the radial direction of the bearing mounting hole 13 with the connection portion 18 of the elastic cantilever 14 located on the back side of the elastic cantilever 14.
In use, the protective bearing 31 is fitted into the bearing mounting hole 13 of the protective bearing holder, and the outer circumferential surface of the outer ring of the protective bearing 31 is supported by the bearing support portion 16 of each elastic arm 14. A certain pre-load may be applied to the resilient cantilever 14 depending on the initial stiffness requirement. During operation, the elastic cantilever 14 on the protective bearing seat can effectively reduce the supporting rigidity of the bearing seat, play an effective role in buffering impact load, and provide a certain damping effect when the helical teeth are subjected to vortex extrusion of the outer ring of the protective bearing 31.
Embodiment 2 of the protective bearing mounting structure of a magnetic bearing in the present invention:
the difference between this embodiment and embodiment 1 is that in this embodiment, the slot 15 formed between two adjacent elastic cantilevers 14 is filled with rubber as an elastic filling material for generating elastic compression deformation when being pressed by the elastic cantilevers 14, so that the damping can be further enhanced. Of course, the specific material and filling amount of the elastic filling material can be designed according to the needs, for example, in other embodiments, a resin material can be used.
Embodiment 3 of the protective bearing mounting structure of a magnetic bearing in the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the support surface 17 of the bearing support portion 16 for supporting the outer circumferential surface of the outer ring of the protective bearing 31 is a flat surface, whereas in this embodiment, the support surface 17 of the bearing support portion 16 for supporting the outer circumferential surface of the outer ring of the protective bearing 31 is an arc-shaped concave surface.
In other embodiments, the bearing surface 17 on the bearing support 16 may be other shapes, such as an arcuate convex surface.
Embodiment 4 of the protective bearing mounting structure of a magnetic bearing in the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the bearing support portion 16 is folded toward the radial outer side of the bearing mounting hole 13 compared to the connection portion 18, whereas in the present embodiment, the bearing support portion 16 is smoothly connected to the back surface of the connection portion 18, and only the front support surface 17 is in a folded relationship with the connection portion 18.
Embodiment 5 of the protective bearing mounting structure of a magnetic bearing in the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the connecting portion 18 of the elastic cantilever 14 near the root portion is arc-shaped, while in this embodiment, the connecting portion 18 is straight.
Embodiment 6 of the protective bearing mounting structure of a magnetic bearing in the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, two elastic cantilevers 14 adjacent in the circumferential direction have an overlap in the radial direction of the bearing mounting hole 13, whereas in the present embodiment, the overhang length of the elastic cantilever 14 is short and two elastic cantilevers 14 adjacent in the circumferential direction are circumferentially offset from each other.
Example 7 of the protective bearing mounting structure of the magnetic bearing of the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the bearing support part 16 is disposed at the outermost end of the elastic cantilever 14, and in the present embodiment, the bearing support part 16 has a distance from the outer end of the elastic cantilever 14.
Embodiment 8 of the protective bearing mounting structure of a magnetic bearing in the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, an elastic cantilever 14 is disposed on a hole wall of a bearing mounting hole 13, and in this embodiment, an annular buffer member is fixedly mounted in the bearing mounting hole 13, and the elastic cantilever 14 is disposed on the annular buffer member.
In the above embodiment, the pressing cover 21 is disposed at one axial end of the bearing mounting hole 13, and the other axial end of the bearing mounting hole 13 is blocked by the seat main body 11.
In addition, it should be noted that the elastic cantilever 14 may also be in other shapes than those in the above embodiments, and the specific achievable stiffness and damping effect thereof may be simulated and optimized through finite element calculation, and guide the final structural parameter design, so as to meet the damping requirement for the falling rotor, for example, the support length of the elastic cantilever 14 is reduced, the thickness of the elastic cantilever 14 is increased, and/or the width of the elastic cantilever 14 is increased to increase the stiffness; this is achieved without inventive effort by the person skilled in the art, which is not further enumerated here.
The embodiment of the protective bearing seat of the magnetic suspension bearing comprises the following steps: the embodiment of the protective bearing seat of the magnetic bearing, that is, the protective bearing seat described in any of the embodiments of the protective bearing mounting structure of the magnetic bearing, will not be described in detail here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. Protection bearing frame of magnetic suspension bearing, its characterized in that includes:
a bearing mounting hole (13) for providing a mounting space for the protection bearing (31);
an elastic cantilever (14) is arranged on the wall of the bearing mounting hole (13), or an annular buffer piece is fixed in the bearing mounting hole (13), and the elastic cantilever (14) is arranged on the annular buffer piece;
the elastic cantilevers (14) are uniformly distributed around the axis of the bearing mounting hole (13);
each elastic cantilever (14) is obliquely suspended relative to the radial direction of the bearing mounting hole (13), a bearing supporting part (16) used for supporting the outer ring peripheral surface of the protective bearing (31) is arranged on the elastic cantilever, and a distance is reserved between the bearing supporting part (16) and the root of the elastic cantilever (14) and used for enabling the elastic cantilever (14) to generate bending deformation when being pressed by the protective bearing (31) so as to buffer the protective bearing (31).
2. The protective bearing seat according to claim 1, wherein the bearing support portion (16) has a flat support surface (17) for supporting the outer circumferential surface of the outer ring of the protective bearing (31).
3. A protective bearing seat according to claim 1, characterised in that the bearing support (16) is folded radially outwardly of the bearing mounting hole (13) compared to the portion of the resilient cantilever (14) on the side of the bearing support (16) closer to the root of the resilient cantilever (14).
4. A protective bearing seat according to claim 1, 2 or 3, characterised in that the part of the resilient cantilever (14) near the root of the bearing support (16) is a connecting portion (18), and the connecting portion (18) is arc-shaped and protrudes outside the bearing mounting hole (13).
5. A protective bearing seat according to claim 1 or 2 or 3, characterised in that two circumferentially adjacent resilient cantilevers (14) have an overlap in the radial direction of the bearing mounting hole (13).
6. A protective bearing seat according to claim 1, 2 or 3, characterised in that the bearing support (16) is arranged at the outermost end of the resilient cantilever (14).
7. A protective bearing seat according to claim 1, 2 or 3, wherein a groove (15) is formed between two adjacent resilient cantilevers (14), and an elastic filling material is arranged in the groove (15) for generating elastic compression deformation when being pressed by the resilient cantilevers (14).
8. The protective bearing housing according to claim 7, wherein the elastic filler is any one of rubber and resin.
9. A protective bearing housing according to claim 1 or 2 or 3, wherein the protective bearing housing comprises:
a seat main body (11), the bearing mounting hole (13) being provided on the seat main body (11);
and the gland (21) is fastened and fixed at the end part of the corresponding end of the bearing mounting hole (13) and is used for axially positioning the protective bearing (31).
10. Protection bearing mounting structure of magnetic suspension bearing, its characterized in that includes:
the protective bearing seat is provided with a protective bearing (31);
the protective bearing seat as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110736963.8A CN113700737B (en) | 2021-06-30 | 2021-06-30 | Protective bearing seat of magnetic suspension bearing and protective bearing mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110736963.8A CN113700737B (en) | 2021-06-30 | 2021-06-30 | Protective bearing seat of magnetic suspension bearing and protective bearing mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113700737A true CN113700737A (en) | 2021-11-26 |
| CN113700737B CN113700737B (en) | 2024-03-19 |
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| CN202110736963.8A Active CN113700737B (en) | 2021-06-30 | 2021-06-30 | Protective bearing seat of magnetic suspension bearing and protective bearing mounting structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750852A (en) * | 2022-03-11 | 2022-07-15 | 杭州宇树科技有限公司 | Integrated joint power unit and foot type robot applying same |
| CN116576147A (en) * | 2023-07-12 | 2023-08-11 | 广东美的暖通设备有限公司 | Method and device for determining magnetic suspension protection boundary and centrifugal compressor |
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| CN110725858A (en) * | 2019-10-21 | 2020-01-24 | 北京航空航天大学 | Segmented open type flexible segment radial protection bearing for magnetic bearing |
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| CN112524154A (en) * | 2020-12-15 | 2021-03-19 | 中车株洲电机有限公司 | Elastic support of radial protection bearing and design method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750852A (en) * | 2022-03-11 | 2022-07-15 | 杭州宇树科技有限公司 | Integrated joint power unit and foot type robot applying same |
| CN116576147A (en) * | 2023-07-12 | 2023-08-11 | 广东美的暖通设备有限公司 | Method and device for determining magnetic suspension protection boundary and centrifugal compressor |
| CN116576147B (en) * | 2023-07-12 | 2023-09-22 | 广东美的暖通设备有限公司 | Method and device for determining magnetic suspension protection boundary and centrifugal compressor |
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| CN113700737B (en) | 2024-03-19 |
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