阅读说明：本技术 一种锥面夹持保护轴承装置 (Conical surface clamping protection bearing device ) 是由 俞成涛 谢超祥 陈宇 王秀英 叶霞 于 2020-04-01 设计创作，主要内容包括：本发明涉及领域磁悬浮轴承系统,具体涉及一种锥面夹持保护轴承装置,包括：双锥面外表面设置在转子的外周,双锥面外表面具有两个对称的外锥形面；两组夹持组件对称设置在双锥面外表面的两侧,夹持组件包括传动件和夹持件,传动件被螺纹装配,所述传动件的内周与所述转子的外周间隙配合,所述夹持件转动装配在所述传动件的靠近所述双锥面外表面的一端,所述夹持件的内周面为与相邻的外锥形面配合的锥形内周面；当所述转子失稳与所述传动件接触,两个所述传动件在所述转子的带动下转动并朝向所述双锥面外表面轴向运动,两个所述夹持件的内周面靠近并夹持所述双锥面外表面。解决了现有技术中的保护轴承装置反应速度慢、保护效果差的技术问题。(The invention relates to the field of magnetic suspension bearing systems, in particular to a conical surface clamping protection bearing device, which comprises: the outer surface of the double conical surface is arranged on the periphery of the rotor, and the outer surface of the double conical surface is provided with two symmetrical outer conical surfaces; the two groups of clamping assemblies are symmetrically arranged on two sides of the outer surface of the double conical surface, each clamping assembly comprises a transmission piece and a clamping piece, the transmission pieces are assembled in a threaded mode, the inner peripheries of the transmission pieces are in clearance fit with the outer periphery of the rotor, the clamping pieces are rotatably assembled at one ends, close to the outer surface of the double conical surface, of the transmission pieces, and the inner peripheral surfaces of the clamping pieces are conical inner peripheral surfaces matched with the adjacent outer conical surfaces; when the rotor is unstable and is in contact with the transmission parts, the two transmission parts are driven by the rotor to rotate and axially move towards the outer surface of the double conical surface, and the inner circumferential surfaces of the two clamping parts are close to and clamp the outer surface of the double conical surface. The technical problems of low reaction speed and poor protection effect of the bearing protection device in the prior art are solved.)

1. A conical surface clamp protection bearing assembly, comprising:

the rotor comprises a double-conical outer surface (11), wherein the double-conical outer surface (11) is arranged on the periphery of the rotor (1), and the double-conical outer surface (11) is provided with two symmetrical outer conical surfaces;

the clamping assemblies (2) are divided into two groups, the two groups of clamping assemblies (2) are symmetrically arranged on two sides of the double-conical-surface outer surface (11), each clamping assembly (2) comprises a transmission piece (21) and a clamping piece (22), the transmission pieces (21) are assembled in a threaded mode, the inner peripheries of the transmission pieces (21) are in clearance fit with the outer periphery of the rotor (1), the clamping pieces (22) are rotatably assembled at one ends, close to the double-conical-surface outer surface (11), of the transmission pieces (21), and the inner peripheral surfaces of the clamping pieces (22) are inner conical surfaces (221) matched with adjacent outer conical surfaces;

when the rotor (1) is unstable and is in contact with the transmission pieces (21), the two transmission pieces (21) are driven by the rotor (1) to rotate and axially move towards the double-conical-surface outer surface (11), and the inner circumferential surfaces of the two clamping pieces (22) are close to and clamp the double-conical-surface outer surface (11).

2. A cone clamp protection bearing assembly according to claim 1, wherein the radial clearance between the inner periphery of the driving member (21) and the outer periphery of the rotor (1) is less than the radial clearance between the inner periphery of the clamping member (22) and the adjacent outer conical surface.

3. The bevel clamp protection bearing assembly of claim 1, wherein said double tapered outer surface (11) is convex in the middle.

4. The cone-gripping protection bearing assembly according to claim 3, wherein the double conical outer surface (11) comprises a first outer conical surface (111), a cylindrical surface (112) and a second outer conical surface (113) which are axially connected in sequence, and the first outer conical surface (111) and the second outer conical surface (113) are symmetrically arranged.

5. The cone clamping protective bearing device according to claim 1, wherein the outer circumference of the transmission member (21) is provided with external threads to be screwed on the frame (3), and the external threads on the two transmission members (21) have opposite screw directions.

6. A cone clamping protection bearing assembly according to claim 5, wherein a fixing block (23) is fixed to the end surface of the driving member (21) adjacent to the outer surface (11) of the double cone, the fixing block (23) being rotatably connected to the clamping member (22) by a bearing (24).

7. The conical surface clamping protection bearing device according to claim 6, wherein the inner peripheral surface of the fixed block (23) is a stepped surface, the inner peripheral surface of the fixed block (23) is matched with the transmission piece (21) to limit the outer ring of the bearing (24), and the clamping piece (22) is matched with the pressing piece (25) to limit the inner ring of the bearing (24).

8. A cone clamp protection bearing assembly according to any one of claims 5 to 7, wherein the end of the drive member (21) remote from the outer surface (11) of the double cone is reduced in external diameter to provide clearance with the housing (3), and the end of the drive member (21) remote from the outer surface (11) of the double cone is provided with a groove (211).

Technical Field

The invention relates to the field of magnetic suspension bearing systems, in particular to a conical surface clamping protection bearing device.

Background

Under the conditions of unexpected power failure and the like, the magnetic suspension bearing system can lose the bearing capacity of the rotor, so a set of protective bearing device needs to be installed to provide temporary support for the rotor, the rotor rotating at a high speed is prevented from falling on the stator to damage the stator, and the safety of the whole magnetic suspension system is ensured. At present, a protection bearing used in a magnetic suspension system mostly adopts a complex external mechanical mechanism, and due to the complexity of the mechanism and uncertainty of accidents, when the magnetic suspension bearing system is powered off accidentally, the phenomena of blocking of the protection mechanism and the like exist, and the bearing can be greatly impacted and vibrated by a rotor, so that the protection bearing is damaged.

Therefore, in order to improve the phenomenon, improve the reliability of the magnetic suspension bearing and expand the application prospect of the magnetic suspension bearing, the magnetic suspension bearing system is researched to actively eliminate the gap between the protection bearing and the rotor and reduce the impact on the protection bearing under the conditions of accidental power failure and the like of the magnetic suspension bearing system, and the magnetic suspension bearing system plays an important role in the development of the magnetic suspension bearing.

Disclosure of Invention

In order to solve the technical problems of low reaction speed and poor protection effect of a protection bearing device in the prior art, the invention provides a conical surface clamping protection bearing device, which solves the technical problems. The technical scheme of the invention is as follows:

a bevel clamp protection bearing assembly comprising: the rotor comprises a rotor body, a double-conical-surface outer surface and a rotor core, wherein the double-conical-surface outer surface is arranged on the periphery of the rotor body and is provided with two symmetrical outer conical surfaces; the clamping assemblies are two groups, the two groups of clamping assemblies are symmetrically arranged on two sides of the outer surface of the double conical surface, each clamping assembly comprises a transmission piece and a clamping piece, the transmission pieces are assembled in a threaded mode, the inner peripheries of the transmission pieces are in clearance fit with the outer periphery of the rotor, the clamping pieces are rotatably assembled at one ends, close to the outer surface of the double conical surface, of the transmission pieces, and the inner peripheral surfaces of the clamping pieces are inner conical surfaces matched with the adjacent outer conical surfaces; when the rotor is unstable and is in contact with the transmission parts, the two transmission parts are driven by the rotor to rotate and axially move towards the outer surface of the double conical surface, and the inner circumferential surfaces of the two clamping parts are close to and clamp the outer surface of the double conical surface.

According to the conical surface clamping protection bearing device, the double-conical surface outer surface is arranged on the rotor, the two groups of clamping assemblies are symmetrically arranged on two sides of the double-conical surface outer surface and are assembled by the threads, the two groups of clamping assemblies can move in opposite directions under the driving of the unstable rotor, and the inner conical surfaces of the two groups of clamping assemblies are respectively connected with the two outer conical surfaces of the double-conical surface outer surface to clamp and support the rotor, so that the protection effect is achieved. The two groups of clamping components of the bearing protection device can automatically move in opposite directions under the driving of the unstable rotor, other driving structures are not needed, and the bearing protection device can play a role in protection under emergency conditions such as power failure.

According to one embodiment of the invention, the radial clearance between the inner circumferential surface of the transmission member and the outer circumferential surface of the rotor is smaller than the radial clearance between the inner circumferential surface of the clamping member and the adjacent outer conical surface.

According to one embodiment of the invention, the outer surface of said double conical surface is convexly curved.

According to one embodiment of the invention, the outer surface of the double conical surface comprises a first outer conical surface, a cylindrical surface and a second outer conical surface which are sequentially connected along the axial direction, and the first outer conical surface and the second outer conical surface are symmetrically arranged.

According to one embodiment of the invention, the outer circumferential surface of the transmission member is distributed with external threads to be assembled on the frame in a threaded manner, and the external threads on the two transmission members have opposite spiral directions.

According to one embodiment of the invention, a fixed block is fixed on the end surface of the transmission piece close to the outer surface of the double conical surface, and the fixed block is rotatably connected with the clamping piece through a bearing.

According to one embodiment of the invention, the inner peripheral surface of the fixed block is a stepped surface, the inner peripheral surface of the fixed block is matched with the transmission piece to limit the outer ring of the bearing, and the clamping piece is matched with the pressing block to limit the inner ring of the bearing.

According to one embodiment of the invention, an outer diameter of an end of the transmission member remote from the outer surface of the double conical surface is reduced to form a gap with the frame, and an end of the transmission member remote from the outer surface of the double conical surface is provided with a groove.

Based on the technical scheme, the invention can realize the following technical effects:

1. according to the conical surface clamping protection bearing device, the double-conical surface outer surface is arranged on the rotor, the two groups of clamping assemblies are symmetrically arranged on two sides of the double-conical surface outer surface and are assembled by the threads, when the rotor normally operates, a gap exists between the inner circumferential surfaces of the two groups of clamping assemblies and the double-conical surface outer surface, and the rotor can normally rotate; when the rotor is unstable, the two groups of clamping assemblies can move in opposite directions under the driving of the unstable rotor, and the inner conical surfaces of the two groups of clamping assemblies are respectively connected with the two outer conical surfaces on the outer surfaces of the double conical surfaces to clamp and support the rotor, so that the rotor is protected. The two groups of clamping assemblies of the bearing protection device can automatically move in opposite directions under the driving of the unstable rotor, do not need other driving structures, and can play a role in protection under emergency conditions such as power failure and the like; when the two clamping pieces clamp the outer surface of the double conical surface, the rotor can continue to rotate for a period of time and stop slowly, so that the rotor is prevented from being damaged;

2. according to the conical surface clamping protection bearing device, the radial clearance between the inner peripheral surface of the transmission piece and the outer peripheral surface of the rotor is smaller than the radial clearance between the inner peripheral surface of the clamping piece and the adjacent outer conical surface, so that the rotor can be firstly contacted with the transmission piece after being unstable and falls, the rotor drives the two transmission pieces to rotate and axially move in opposite directions, and the two clamping pieces are close to the outer surface of the clamping double conical surface;

3. according to the conical surface clamping protection bearing device, the outer surface of the double conical surface comprises the first outer conical surface, the cylindrical surface and the second outer conical surface which are sequentially connected along the axial direction, the first outer conical surface and the second outer conical surface are symmetrically arranged, and the middle part is convex, so that an axial gap is reserved between the two clamping pieces when the two clamping pieces clamp the outer surface of the double conical surface, and the two clamping pieces are prevented from being collided to cause damage;

4. according to the conical surface clamping protection bearing device, the outer diameter of one end, far away from the outer conical surface, of the transmission part is reduced to form a gap with the frame, the end is provided with the groove, so that a tool can be used for applying acting force to the two driving parts conveniently during resetting, the two driving parts move axially in a back-to-back mode, a gap is reserved between the two clamping parts and the outer surface of the double conical surface, and the rotor can be restored to normally operate.

Drawings

FIG. 1 is a schematic structural view of a conical surface clamping protection bearing device according to the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 2;

FIG. 4 is a schematic view of the structure of the clamping member;

FIG. 5 is a cross-sectional view C-C of FIG. 4;

in the figure: 1-a rotor; 11-double conical surface outer surface; 111-a first external tapered surface; 112-cylindrical surface; 113-a second outer tapered surface; 2-a clamping assembly; 21-a transmission member; 211-a trench; 22-a clamp; 221-inner conical surface; 23-fixing blocks; 24-a bearing; 25-briquetting; 3-a frame; 31-internal thread; 32-blocking slot.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1-5, the present embodiment provides a conical surface clamping protection bearing device, which is installed on the outer periphery of a rotor 1, and under normal conditions, there is a gap between the conical surface clamping protection bearing device and the outer periphery of the rotor 1, and under the action of a radial magnetic bearing, the rotor 1 can be in a radial equilibrium state, and the rotor 1 can rotate at a high speed under the driving of a motor; when the magnetic suspension system is powered off or fails, the conical surface clamping protection bearing device can play a role in supporting the rotor 1 and protecting the radial magnetic bearing. The motor can be positioned in the middle of the rotor 1, and the two radial magnetic bearings are symmetrically arranged on the two axial sides of the motor.

Conical surface centre gripping protection bearing device is including setting up bipyramid surface 11 and two sets of centre gripping subassembly 2 on rotor 1, two sets of centre gripping subassembly 2 symmetry sets up the axial both sides at bipyramid surface 11, centre gripping subassembly 2 is by the screw assembly, clearance fit between the inner periphery of centre gripping subassembly 2 and the outer peripheral face of rotor 1, when rotor 1 unstability falls, rotor 1 contacts with the inner peripheral surface of centre gripping subassembly 2, centre gripping subassembly 2 rotates and produces axial displacement along with rotor 1, 2 axial phase motion of two sets of centre gripping subassemblies meets with bipyramid surface 11, support rotor 1.

The double-cone outer surface 11 is arranged on the rotor 1, the double-cone outer surface 11 is in a convex shape in the middle, the double-cone outer surface 11 comprises a first outer cone surface 111, a cylindrical surface 112 and a second outer cone surface 113 which are sequentially connected along the axial direction, the first outer cone surface 111 and the second outer cone surface 113 are symmetrically arranged, the cylindrical surface 112 is connected with one end with the large diameter of the two outer cone surfaces 111 and 113, and the cylindrical surface 112 is equal to the large diameter of the outer cone surfaces 111 and 113.

Two sets of centre gripping subassemblies 2 symmetry sets up in the axial both sides of biconical surface 11 to a set of centre gripping subassembly 2 for the example, and centre gripping subassembly 2 includes driving medium 21 and holder 22, and driving medium 21 clearance cover is established in the periphery of rotor 1, and the outer peripheral face of driving medium 21 is provided with the external screw thread, and driving medium 21 screw assembly is on frame 3, the inner peripheral surface and the rotor 1 clearance fit of driving medium 21. One end of the transmission piece 21 close to the double-conical-surface outer surface 11 is rotatably connected with the clamping piece 22, the inner circumferential surface of the clamping piece 22 is an inner conical surface 221 matched with one outer conical surface of the adjacent double-conical-surface outer surface 11, when the rotor 1 is unstable and falls, the rotor 1 is connected with the inner circumferential surface of the transmission piece 21, the transmission piece 21 rotates along with the rotor 1 and axially moves towards the double-conical-surface outer surface 11 until the inner conical surface 221 of the clamping piece 22 is connected with the adjacent outer conical surface, and the function of supporting the rotor 1 is achieved. Preferably, the radial clearance between the inner circumferential surface of the transmission member 21 and the outer circumferential surface of the rotor 1 is smaller than the radial clearance between the inner conical surface 221 of the clamping member 22 and the outer conical surface of the adjacent double conical outer surface 11.

Specifically, a fixing block 23 is fixed on one end surface of the transmission member 21 close to the outer surface 11 of the double conical surface, and the fixing block 23 is rotatably connected with the clamping member 22 through a bearing 24. More specifically, the inner peripheral surface of the fixed block 23 is a stepped surface, and the inner peripheral surface of the fixed block 23 is matched with the outer ring of the end surface limit bearing 24 of the transmission member 21; the outer peripheral surface of the clamping piece 22 is a stepped surface, and the outer peripheral surface of the clamping piece 22 is matched with the pressing block 25 to limit the inner ring of the bearing 24.

Preferably, in order to facilitate the resetting of the clamping assembly 2, a larger gap exists between one end of the transmission member 21, which is far away from the double-cone outer surface 11, and the frame 3, and the end is further provided with a groove 211, so that a tool can be used to extend into the groove 211 to drive the clamping assembly 2 to rotate and be far away from the double-cone outer surface 11, a gap exists between the clamping assembly 2 and the double-cone outer surface 11, and the rotor 1 can work normally.

Frame 3 is located the periphery of rotor 1, and centre gripping subassembly 2 screw thread is installed in frame 3, and the inner peripheral surface distribution of frame 3 has two sets of internal threads 31, respectively with the external screw thread fit on two driving medium 21, and the inner peripheral surface of frame 3 still is provided with round blocking groove 32 in order to separate two sets of internal threads 31. In order to make the two sets of clamping components 2 move towards each other under the driving of the rotor 1, the two sets of internal threads 31 may be arranged in different rotation directions, and the two transmission members 21 may also be arranged in different rotation directions.

Based on the above structure, the working principle of the clamping type protective bearing device of the embodiment is as follows:

when the system works normally, the rotor 1 rotates at a high speed, a gap is reserved between the clamping pieces 22 of the two groups of clamping assemblies 2 and the outer surface of the double conical surfaces of the rotor, and the rotor 1 can rotate normally;

under the condition of system power failure or fault, the rotor 1 loses magnetic suspension acting force, the rotor 1 is unstable and falls, the rotor 1 is firstly contacted with the transmission piece 21, the transmission piece 21 rotates along with the rotor 1 and axially moves towards the outer surface 11 of the double conical surface, the clamping piece 22 moves towards the outer surface 11 of the double conical surface under the drive of the transmission piece 21 until the inner conical surface 221 of the clamping piece 22 is connected with the outer conical surface of the outer surface 11 of the double conical surface, and the clamping component 2 rotatably supports the rotor 1;

when the system is normally operated again, a tool can be inserted into the groove 211 on the transmission member 21, the transmission member 21 is rotated, the transmission member 21 drives the clamping member 22 to move away from the outer surface 11 of the double conical surface, a gap exists between the transmission member 21 and the outer surface 11 of the double conical surface, and the rotor 1 can normally rotate.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.