CN116877575A - Electromagnetic bearing rotor system - Google Patents

Abstract

The invention relates to the technical field of electromagnetic bearings, in particular to an electromagnetic bearing rotor system, which comprises a rotating shaft and a mounting seat, wherein an electromagnetic bearing assembly and an auxiliary bearing assembly are coaxially arranged on the mounting seat, and the rotating shaft is jointly arranged on the electromagnetic bearing assembly and the auxiliary bearing assembly in a penetrating manner; the auxiliary bearing assembly comprises an outer ring valve seat, an inner ring valve seat and an auxiliary bearing, wherein the outer ring valve seat is connected with the outer ring of the auxiliary bearing, and the inner ring valve seat is connected with the inner ring; the outer ring valve seat and the mounting seat are axially provided with a gap along the rotating shaft, an elastic piece is arranged in the gap, the inner ring valve seat is provided with a connecting hole for the rotating shaft to penetrate, the wall of the connecting hole is provided with an abutting surface, the abutting surface extends obliquely along the axial direction of the rotating shaft towards the direction away from the rotating shaft, and the rotating shaft is abutted with the abutting surface, so that the axial load and the radial load are balanced through the elastic piece, the effect of protecting the auxiliary bearing is achieved, the supporting effect of the auxiliary bearing assembly on the rotating shaft is further improved, and the electromagnetic bearing assembly is better protected.

Description

Electromagnetic bearing rotor system

Technical Field

The present disclosure relates to the field of electromagnetic bearings, and in particular, to an electromagnetic bearing rotor system.

Background

The electromagnetic bearing is used as a novel supporting part, has the advantages of no contact, no abrasion, no lubrication, high rotating speed, low noise, intelligent control and the like, is another revolutionary change of the bearing industry after oil lubrication and gas lubrication, and is gradually applied to the fields of industry, aerospace and the like in recent years. Because electromagnetic bearing can have instability when using, when electromagnetic bearing became invalid, the pivot can produce and fall the impact, leads to electromagnetic bearing or pivot damage. Therefore, the rotor system of the electromagnetic bearing is generally provided with a protection bearing, and when the rotating shaft falls down, the protection bearing falls onto the auxiliary bearing, so that a buffer effect is achieved to protect the rotating shaft and the electromagnetic bearing.

However, in practical applications, electromagnetic bearing rotor systems are often applied to high-speed or heavy-duty equipment, and after the electromagnetic bearing fails, the auxiliary bearing can bear a great impact load, so that the auxiliary bearing is damaged, and protection of the electromagnetic bearing fails.

Disclosure of Invention

To solve or at least partially solve the above technical problems, the present disclosure provides an electromagnetic bearing rotor system.

The invention provides an electromagnetic bearing rotor system, which comprises a rotating shaft and a mounting seat, wherein an electromagnetic bearing assembly and an auxiliary bearing assembly are coaxially arranged on the mounting seat, and the rotating shaft is jointly arranged on the electromagnetic bearing assembly and the auxiliary bearing assembly in a penetrating manner;

the auxiliary bearing assembly comprises an outer ring valve seat, an inner ring valve seat and an auxiliary bearing, wherein the outer ring valve seat is connected with the outer ring of the auxiliary bearing, and the inner ring valve seat is connected with the inner ring of the auxiliary bearing;

the outer ring valve seat and the mounting seat are axially provided with a gap along the rotating shaft, an elastic piece is arranged in the gap, the inner ring valve seat is provided with a connecting hole for the rotating shaft to penetrate, the hole wall of the connecting hole is provided with an abutting surface, the abutting surface extends obliquely along the axial direction of the rotating shaft towards the direction away from the rotating shaft, and the rotating shaft is abutted with the abutting surface.

Optionally, the auxiliary bearing assembly further includes an annular abutment disposed in the connection hole, and the annular abutment is formed on the abutment surface along two axial end surfaces of the rotating shaft;

the outer wall of the rotating shaft is provided with an abutting part extending towards the annular abutting piece, and the abutting part abuts against the abutting surfaces at two ends of the annular abutting piece.

Optionally, the hole wall of the connecting hole is provided with a mounting part extending towards the axis direction close to the rotating shaft, the annular abutting piece comprises a first abutting ring and a second abutting ring, and the first abutting ring and the second abutting ring are respectively arranged at two sides of the mounting part along the axial direction of the rotating shaft;

in the axial direction along the rotating shaft, one end, away from each other, of the first abutting ring and the second abutting ring respectively forms one abutting surface.

Optionally, two abutting bushings are sleeved on the outer wall of the rotating shaft at intervals, and the two abutting bushings jointly form the abutting part;

and a mounting gap is formed between the two abutting bushings, and the annular abutting piece is positioned in the mounting gap and is mutually abutted with the two abutting bushings.

Optionally, the mounting seat comprises a mounting sleeve and end covers covered at two ends of the mounting sleeve, a mounting hole is formed in the axial position of the end covers, the rotating shaft is arranged on the mounting sleeve in a penetrating manner, and two ends of the rotating shaft penetrate out of the mounting holes in the end covers at two ends of the mounting sleeve;

the auxiliary bearing assembly is arranged at a position, close to the end cover, in the mounting sleeve, and the gap is formed between the outer ring valve seat and the end cover.

Optionally, the auxiliary bearing assembly further comprises a compression flange, wherein the compression flange is arranged on the outer peripheral side of the outer ring valve seat, and part of the compression flange is pressed on the side, facing away from the end cover, of the outer ring valve seat;

the compression flange is connected with the end cover through a fastener.

Optionally, a mounting groove is formed on the side, facing the end cover, of the compression flange and the outer ring valve seat, and the mounting groove forms the gap.

Optionally, the number of the auxiliary bearing assemblies is two, and the two auxiliary bearing assemblies are respectively arranged at positions, close to two ends of the rotating shaft, of the mounting seat.

Optionally, the elastic element is a spring;

and/or, the annular abutting piece is a graphite ring.

Optionally, the electromagnetic bearing assembly comprises an axial electromagnetic bearing, the axial electromagnetic bearing comprises a thrust disc and two axial electromagnetic bearing stators, the thrust disc is sleeved on the rotating shaft, and the two axial electromagnetic bearing stators are respectively arranged at two sides of the thrust disc along the axial direction of the rotating shaft;

the thrust disk is characterized in that a connecting hole used for the rotating shaft to penetrate is formed in the position of the axis of the rotating shaft, the hole wall of the connecting hole extends obliquely along the axial direction of the rotating shaft towards the direction away from the rotating shaft, a connecting bush is arranged on the outer wall of the rotating shaft, which corresponds to the connecting hole, and the extending direction of the outer side wall of the connecting bush is matched with the extending direction of the hole wall of the connecting hole.

Compared with the prior art, the technical scheme provided by the disclosure has the following advantages:

the electromagnetic bearing rotor system that this disclosure provided is through coaxial electromagnetic bearing subassembly and the auxiliary bearing subassembly that sets up on the mount pad, makes the pivot wear to establish jointly on electromagnetic bearing subassembly and the auxiliary bearing subassembly to make electromagnetic bearing subassembly and auxiliary bearing subassembly play the supporting role to the pivot jointly, and, the auxiliary bearing subassembly includes outer lane disk seat, inner circle disk seat and auxiliary bearing, the outer lane disk seat with follow between the mount pad the axial of pivot is formed with the space, be provided with the elastic component in the space, thereby can be when the pivot produces axial displacement deviation for the mount pad through the elastic component to the axial displacement of pivot balances, avoided the auxiliary bearing to bear too big axial load, simultaneously, still be formed with on the pore wall of connecting hole follow the axial orientation of pivot is kept away from the butt face that the direction slope of pivot extends, the pivot with butt face butt to can be with partial load effort disperseed to the axial of pivot through the butt face that inclines to set up when the pivot produces radial displacement deviation for the mount pad, and balanced through the elastic component, thereby reduced the radial load that the auxiliary bearing bore only, consequently, not protected the auxiliary bearing has still improved the effect to the auxiliary bearing that further protects the auxiliary bearing.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural view of an electromagnetic bearing rotor system according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of an auxiliary bearing assembly of an electromagnetic bearing rotor system according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view of an axial electromagnetic bearing of an electromagnetic bearing rotor system according to an embodiment of the present disclosure.

Wherein, 1, the rotating shaft; 11. a rotating shaft sleeve; 12. abutting the bushing; 2. a mounting base; 21. a mounting sleeve; 22. an end cap; 3. an electromagnetic bearing assembly; 31. a radial electromagnetic bearing; 31a, radial electromagnetic bearing rotor; 31b, radial electromagnetic bearing stators; 32. an axial electromagnetic bearing; 32a, thrust disc; 32b, an axial electromagnetic bearing stator; 4. an auxiliary bearing assembly; 41. an outer ring valve seat; 42. an inner ring valve seat; 43. an auxiliary bearing; 44. an elastic member; 45. an annular abutment; 451. a first abutment ring; 452. a second abutment ring; 46. a mounting part; 47. compressing the flange; 48. adjusting the gasket; 49. a fastener; 5. a high-speed motor; 6. radial electromagnetic bearing sensors; 7. an axial electromagnetic bearing sensor; 8. and connecting the bushings.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

As shown in fig. 1-3, the present embodiment provides an electromagnetic bearing rotor system, which includes a rotating shaft 1 and a mounting seat 2, wherein an electromagnetic bearing assembly 3 and an auxiliary bearing assembly 4 are coaxially arranged on the mounting seat 2, and the rotating shaft 1 is jointly arranged on the electromagnetic bearing assembly 3 and the auxiliary bearing assembly 4 in a penetrating manner.

Illustratively, the electromagnetic bearing assembly 3 includes a radial electromagnetic bearing 31 and an axial electromagnetic bearing 32, the radial electromagnetic bearing 31 and the axial electromagnetic bearing 32 are both sleeved on the rotating shaft 1, wherein the radial electromagnetic bearing 31 is used for supporting a radial load of the rotating shaft 1, and the axial electromagnetic bearing 32 is used for supporting an axial load of the rotating shaft 1.

The radial electromagnetic bearing 31 and the axial electromagnetic bearing 32 are both rotatably supporting the rotating shaft 1, the radial electromagnetic bearing 31 generates a magnetic force along the radial direction of the rotating shaft 1 after being electrified, and the axial electromagnetic bearing 32 generates a magnetic force along the axial direction of the rotating shaft 1 after being electrified. The radial magnetic force generated by the radial electromagnetic bearing 31 and the axial magnetic force generated by the axial electromagnetic bearing 32 suspend and support the rotating shaft 1 in a non-contact mode, so that the rotating shaft 1 is not in mechanical contact with the radial electromagnetic bearing 31 and the axial electromagnetic bearing 32, and further the radial electromagnetic bearing 31 and the axial electromagnetic bearing 32 sleeved on the rotating shaft 1 are not in mechanical abrasion.

Illustratively, at least one radial electromagnetic bearing 31 and one axial electromagnetic bearing 32 are provided, and two axial electromagnetic bearings 32 and one radial electromagnetic bearing 31 are provided in this embodiment, and the two axial electromagnetic bearings 32 are separately provided at positions near both ends of the rotating shaft 1 of the mount 2.

The electromagnetic bearing rotor system further comprises a high-speed motor 5 and a controller, wherein the high-speed motor 5 is used for driving the rotating shaft 1 to rotate, and when the electromagnetic bearing rotor system is used, the electromagnetic bearing rotor system can be vertically or horizontally placed, and the high-speed motor 5 is arranged on the mounting seat 2 and correspondingly connected to the end part of the rotating shaft 1.

In some embodiments, radial electromagnetic bearing 31 includes a radial electromagnetic bearing rotor 31a and a radial electromagnetic bearing stator 31b. The radial electromagnetic bearing rotor 31a is mounted on the outer wall of the rotary shaft 1, and the radial electromagnetic bearing stator 31b is provided correspondingly on the outer peripheral side of the radial electromagnetic bearing rotor 31a with a gap formed between the radial electromagnetic bearing rotor 31 a. The inside of the radial electromagnetic bearing rotor 31a is a cylindrical magnetic circuit, and is made of an electric steel plate, and is fixed on the outer wall of the rotating shaft 1, and is matched with the radial electromagnetic bearing stator 31b to realize rotor suspension.

The electromagnetic bearing rotor system further includes, illustratively, two radial electromagnetic bearing 31 sensors disposed in correspondence with the two radial electromagnetic bearings 31. The radial electromagnetic bearing 31 sensor is provided on one side of the radial electromagnetic bearing 31. When the electromagnetic bearing rotor system works normally, the two radial electromagnetic bearing 31 sensors can acquire radial displacement signals of the rotating shaft 1 in real time, and when the rotating shaft 1 has radial displacement deviation, the controller can change currents of the two radial electromagnetic bearings 31 according to the deviation signals sent by the sensors so as to correct the radial position of the rotor.

In some embodiments, the axial electromagnetic bearing 32 includes a thrust disc 32a and two axial electromagnetic bearing stators 32b, the thrust disc 32a is sleeved on the rotating shaft 1, and the two axial electromagnetic bearing stators 32b are respectively arranged on two sides of the thrust disc 32a along the axial direction of the rotating shaft 1.

The electromagnetic bearing rotor system also includes an axial electromagnetic bearing 32 sensor, for example. When the electromagnetic bearing rotor system works normally, the axial electromagnetic bearing 32 sensor can collect axial displacement signals of the rotating shaft 1 in real time, when the rotating shaft 1 has axial displacement deviation, the controller can change currents in the axial electromagnetic bearing stators 32b of the two axial electromagnetic bearings 32 positioned on two sides of the thrust disc 32a according to the deviation signals sent by the sensor, so that acting force of the two axial electromagnetic bearing stators 32b on the thrust disc 32a is changed, the thrust disc 32a moves along the axial direction of the rotating shaft 1 and drives the rotating shaft 1 to move, and the axial position of the rotating shaft 1 is corrected.

Illustratively, in installing the above structures, radial electromagnetic bearings 31 may be installed at both ends of the rotating shaft 1 for supporting the rotating shaft 1 to rotate. An axial electromagnetic bearing 32 is installed on a portion of the rotating shaft 1 between the two radial electromagnetic bearings 31, an axial electromagnetic bearing 32 sensor is installed on one side of the axial electromagnetic bearing 32, and the high-speed motor 5 is installed on a portion of the rotating shaft 1 between the two radial electromagnetic bearings 31. Of course, in other embodiments, other arrangements may be used.

In the axial direction of the shaft 1, the radial electromagnetic bearing rotor 31a and the thrust disk 32a, the thrust disk 32a and the axial electromagnetic bearing 32 sensor, the axial electromagnetic sensor and the high-speed motor 5, and the high-speed motor 5 and the radial electromagnetic bearing rotor 31a can be in a limit fit through the sleeve of the shaft 1.

The auxiliary bearing assembly 4 comprises an outer ring valve seat 41, an inner ring valve seat 42 and an auxiliary bearing 43, wherein the outer ring valve seat 41 is connected with the outer ring of the auxiliary bearing 43, the inner ring valve seat 42 is connected with the inner ring of the auxiliary bearing 43, a gap is formed between the outer ring valve seat 41 and the mounting seat 2 along the axial direction of the rotating shaft 1, an elastic piece 44 is arranged in the gap, a connecting hole for the rotating shaft 1 to penetrate is formed in the inner ring valve seat 42, an abutting surface is formed on the hole wall of the connecting hole, the abutting surface extends obliquely along the axial direction of the rotating shaft 1 towards the direction away from the rotating shaft 1, and the rotating shaft 1 is abutted with the abutting surface.

In particular, when the electromagnetic bearing rotor system is in a normal working state, the axial electromagnetic bearing 32 sensor can collect an axial displacement signal of the rotating shaft 1 in real time, and when axial displacement deviation occurs, the controller can change the current of the magnetic circuit in the axial electromagnetic bearing stator 32b so as to correct the axial position of the thrust disc 32 a. When the axial electromagnetic bearing 32 fails, axial load can be transmitted to the outer ring valve seat 41 through the inner ring valve seat 42 and the auxiliary bearing 43. Since the elastic member 44 is provided between the outer ring valve seat 41 and the mounting seat 2 of the rotor system, the axial load of the rotating shaft 1 can be buffered by the elastic member 44 to balance the load force. Illustratively, the maximum axial displacement that the resilient member 44 may be capable of compressing is less than the allowable clearance between the thrust disc 32a and the axial electromagnetic bearing stator 32b to avoid damage to the axial electromagnetic bearing 32.

Correspondingly, the radial electromagnetic bearing 31 sensor can acquire radial displacement signals of the rotating shaft 1 in real time, and when radial displacement deviation occurs, the controller changes currents in the two radial electromagnetic bearing rotors 31a so as to correct the radial position of the rotating shaft 1. When the radial electromagnetic bearing 31 fails, radial load is transferred to the inner ring valve seat 42 through the abutting surface due to the abutting surface abutting on the inner ring valve seat 42, and load force is dispersed to two directions along the axial direction and the radial direction of the rotating shaft 1 due to the fact that the abutting surface extends obliquely along the axial direction of the rotating shaft 1 towards the direction away from the rotating shaft 1, wherein the radial load can be borne through the auxiliary bearing 43, the axial load can be transferred to the auxiliary bearing 43 through the inner ring valve seat 42, and then transferred to the outer ring valve seat 41 through the auxiliary bearing 43, and then buffered through the elastic piece 44, so that the load force can be balanced.

In this process, the elastic member 44 mainly serves as a first line of defense for balancing the load, and the auxiliary bearing 43 serves as a second line of defense for ensuring the safety and reliability of the electromagnetic bearing rotor system. For example, ball bearings may be used for the auxiliary bearing 43, although other forms of bearing structures may be used for the auxiliary bearing 43 in other embodiments.

According to the electromagnetic bearing rotor system provided by the embodiment, the electromagnetic bearing assembly 3 and the auxiliary bearing assembly 4 are coaxially arranged on the mounting seat 2, so that the rotating shaft 1 is jointly penetrated on the electromagnetic bearing assembly 3 and the auxiliary bearing assembly 4, the electromagnetic bearing assembly 3 and the auxiliary bearing assembly 4 jointly play a supporting role on the rotating shaft 1, the auxiliary bearing assembly 4 comprises the outer ring valve seat 41, the inner ring valve seat 42 and the auxiliary bearing 43, a gap is formed between the outer ring valve seat 41 and the mounting seat 2 along the axial direction of the rotating shaft 1, the elastic piece 44 is arranged in the gap, and therefore the axial displacement of the rotating shaft 1 can be balanced through the elastic piece 44 when the rotating shaft 1 generates axial displacement deviation relative to the mounting seat 2, the excessive axial load of the auxiliary bearing 43 is avoided, meanwhile, an abutting surface which extends obliquely along the axial direction of the rotating shaft 1 and far away from the rotating shaft 1 is formed, the abutting surface is abutted, partial load can be dispersed to the rotating shaft 1 through the abutting surface which is obliquely arranged when the rotating shaft 1 generates radial displacement deviation relative to the mounting seat 2, the axial displacement of the rotating shaft is further improved, the electromagnetic bearing rotor system is further improved, and the electromagnetic bearing rotor system is further protected by the auxiliary bearing assembly 43, and the radial load is further improved, and the effect of the electromagnetic bearing rotor system is further improved, and the supporting assembly is further protected, and the bearing assembly is 3 is greatly and is protected.

The electromagnetic bearing rotor system provided by the embodiment can be applied to an air compressor, and is horizontally placed when the electromagnetic bearing rotor system is applied to the air compressor. Of course, in other embodiments, the electromagnetic bearing rotor system may be applied to other occasions, such as a turbine rotor system of a nuclear reactor, a flywheel energy storage rotor system in regenerative braking energy, etc., when the rotor system is vertically placed, the axial load is generally larger, and the auxiliary bearing assembly 4 provided in this embodiment can further embody its capability of balancing the axial load.

In some embodiments, the resilient member 44 may use a spring. The spring may be an annular spring wound around the outer ring of the rotating shaft 1, for example, to play a role in buffering in various directions. Of course, in other embodiments, other types of structures, such as resilient pads, may be used for the resilient member 44.

Referring to fig. 2, in some embodiments, a stepped hole may be provided in the outer ring valve seat 41 for supporting the outer ring of the auxiliary bearing 43 to facilitate positioning and fixing of the auxiliary bearing 43. Correspondingly, a stepped hole can be formed on the outer side of the inner ring valve seat 42 for supporting the inner ring of the auxiliary bearing 43 to cooperate with the outer ring valve seat 41 to position and fix the auxiliary bearing 43.

In some embodiments, the number of auxiliary bearing assemblies 4 is two, and two auxiliary bearing assemblies 4 are separately provided at positions of the mounting base 2 near both ends of the rotating shaft 1. The auxiliary bearing assemblies 4 are arranged at two positions, close to the two ends of the rotating shaft 1, of the mounting seat 2 respectively, can play a supporting role on the two ends of the rotating shaft 1 and are used for bearing the impact of the rotating shaft 1 when falling down, so that the supporting and protecting effects on the rotating shaft 1 are further improved.

For example, at the time of installation, two auxiliary bearing assemblies 4 may be separately provided at positions of the mount 2 near both ends of the rotating shaft 1, and two radial electromagnetic bearings 31 are respectively installed at inner sides of the rotating shaft 1 with respect to the auxiliary bearing assemblies 4.

In some embodiments, the auxiliary bearing assembly 4 further includes an annular abutment 45 disposed in the connection hole, two end faces of the annular abutment 45 along the axial direction of the rotating shaft 1 are formed into the abutment faces, and an abutment portion extending toward the annular abutment 45 is formed on the outer wall of the rotating shaft 1 and abuts against the abutment faces at two ends of the annular abutment 45.

Through setting up annular butt spare 45, make things convenient for the inner circle disk seat 42 of auxiliary bearing assembly 4 to correspond the butt with pivot 1 to be annular along the circumference of pivot 1, can play the butt effect to all directions.

For example, the annular abutment 45 may be a graphite ring. The graphite ring is formed by pressing flexible graphite through a die, has the characteristics of high temperature resistance and wear resistance, and can play a role in buffering axial and radial loads of the rotating shaft 1 to a certain extent.

In some embodiments, the hole wall of the connecting hole has a mounting portion 46 extending toward the axial direction near the rotating shaft 1, the annular abutment member 45 includes a first abutment ring 451 and a second abutment ring 452, the first abutment ring 451 and the second abutment ring 452 are disposed separately on both sides of the mounting portion 46 in the axial direction of the rotating shaft 1, and in the axial direction of the rotating shaft 1, one of the abutment surfaces is formed by the ends of the first abutment ring 451 and the second abutment ring 452 that are far from each other.

Illustratively, the mounting portion 46 is an annular protrusion extending from the hole wall of the connecting hole toward the direction close to the axis of the rotating shaft 1, two end surfaces of the mounting portion 46 along the axial direction of the rotating shaft 1 may be planes extending along the radial direction of the rotating shaft 1, one end of the first abutment ring 451 and one end of the second abutment ring 452 are planes, and the other end is a conical surface, and the conical surface is in contact with the rotating shaft 1, so that when the rotating shaft 1 is subjected to axial load, the acting force can be transferred to the child mounting portion 46 and divided into two parts, namely, the axial direction and the radial direction, by the inclined conical surface.

In some embodiments, two abutment bushings 12 are sleeved on the outer wall of the rotating shaft 1 at intervals, the two abutment bushings 12 together form the abutment portion, a mounting gap is formed between the two abutment bushings 12, and the annular abutment member 45 is located in the mounting gap and abuts against the two abutment bushings 12. The setting is like this, makes things convenient for pivot 1 and annular butt piece 45 to all realize the butt effect along the two directions of the axis of pivot 1 to make things convenient for the installation of structure fixed.

In some embodiments, the mounting base 2 includes a mounting sleeve 21 and end caps 22 covering two ends of the mounting sleeve 21, a mounting hole is formed in an axial position of the end caps 22, the rotating shaft 1 is inserted into the mounting sleeve 21, and two ends of the rotating shaft 1 are inserted out of the mounting holes on the end caps 22 located at two ends of the mounting sleeve 21.

And, the auxiliary bearing assembly 4 is disposed in the mounting sleeve 21 at a position close to the end cap 22, and the clearance is formed between the outer ring valve seat 41 and the end cap 22. This arrangement facilitates the connection of the auxiliary bearing assembly 4 to the mounting block 2. Of course, in other embodiments, the auxiliary bearing assembly 4 may be disposed at other positions in the mounting sleeve 21, such as an extended structure disposed on the inner wall of the mounting sleeve 21, and the auxiliary bearing assembly 4 correspondingly mates with the extended structure.

In some embodiments, the auxiliary bearing assembly 4 further comprises a pressing flange 47, wherein the pressing flange 47 is disposed on the outer circumferential side of the outer ring valve seat 41, and is partially pressed on the side of the outer ring valve seat 41 facing away from the end cover 22, and the pressing flange 47 and the end cover 22 are connected through a fastener 49. The pressing flange 47 is used for installing and fixing the auxiliary bearing assembly 4 and the end cover 22, so that stability of the auxiliary bearing assembly 4 in use is guaranteed.

Illustratively, the compression flange 47 and the side of the outer ring valve seat 41 facing the end cap 22 are cooperatively formed with a mounting groove that forms the void. The arrangement of the mounting groove facilitates positioning of the elastic member 44.

An adjusting washer 48 may be interposed between the pressing flange 47 and the outer ring valve seat 41, for example. The provision of the adjustment shim 48 not only protects the contact surface between the pressing flange 47 and the outer ring valve seat 41 to a certain extent, but also enables the distance between the pressing flange 47 and the outer ring valve seat 41 to be adjusted by adjusting the thickness of the adjustment shim 48.

Correspondingly, when the auxiliary bearing assembly 4 is mounted, the auxiliary bearing 43 may be mounted between the outer ring valve seat 41 and the inner ring valve seat 42, and then the whole of the auxiliary bearing 43, the outer ring valve seat 41 and the inner ring valve seat 42 may be fixed to the end cover 22 and the mounting bush in the end cover 22. The elastic member 44 is placed in a mounting groove formed by the pressing flange 47 and the outer ring valve seat 41, and then the elastic member 44 and the outer ring valve seat 41 and the elastic member 44 and the end cover 22 are locked by the fastener 49.

The fastening member 49 may be a connecting bolt, the circumferential direction of the pressing flange 47 is provided with a connecting screw hole, and the end cover 22 is also provided with a mounting screw hole at a position corresponding to all the connecting screw holes, and the connecting bolt is jointly inserted into the connecting screw hole and the mounting screw hole and is fixed by using a nut. Further, the elastic member 44 can be made to realize different buffering forces by adjusting the tightening position of the connecting bolt.

In some embodiments, a connection hole for the spindle 1 to pass through is formed at an axial position along the spindle 1 of the thrust disc 32a of the axial electromagnetic bearing 32. The hole wall of the connecting hole extends along the axial direction of the rotating shaft 1 towards the direction far away from the rotating shaft 1, a connecting bushing 8 is arranged on the outer wall of the corresponding connecting hole of the rotating shaft 1, and the extending direction of the outer side wall of the connecting bushing 8 is matched with the extending direction of the hole wall of the connecting hole.

Illustratively, a cylindrical hole is formed at a position of the connection bushing 8 in the axial direction of the rotating shaft 1 for a fit-fit with the rotating shaft 1. The outer side wall of the connecting bush 8 is matched with the wall of the connecting hole, that is, the extending direction of the outer side wall of the connecting bush 8 extends along the axial direction of the rotating shaft 1 towards the direction away from the rotating shaft 1, that is, the outer surface of the bush can be provided with a conical surface, for example, so as to be matched with the inner wall of the connecting hole of the thrust disc 32a, thereby ensuring the center of the axial center of the thrust disc 32a of the axial electromagnetic bearing 32, and reducing the possibility of radial unbalanced load generated by the axial electromagnetic bearing 32 in use.

It should be noted that in this document, relational terms such as "first" and "second" and the like 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. Moreover, 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, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An electromagnetic bearing rotor system is characterized by comprising a rotating shaft (1) and a mounting seat (2), wherein an electromagnetic bearing assembly (3) and an auxiliary bearing assembly (4) are coaxially arranged on the mounting seat (2), and the rotating shaft (1) is jointly arranged on the electromagnetic bearing assembly (3) and the auxiliary bearing assembly (4) in a penetrating mode;

the auxiliary bearing assembly (4) comprises an outer ring valve seat (41), an inner ring valve seat (42) and an auxiliary bearing (43), wherein the outer ring valve seat (41) is connected with the outer ring of the auxiliary bearing (43), and the inner ring valve seat (42) is connected with the inner ring of the auxiliary bearing (43);

the novel rotary valve is characterized in that a gap is formed between the outer ring valve seat (41) and the mounting seat (2) along the axial direction of the rotary shaft (1), an elastic piece (44) is arranged in the gap, a connecting hole for the rotary shaft (1) to penetrate is formed in the inner ring valve seat (42), an abutting surface is formed in the hole wall of the connecting hole, the abutting surface extends along the axial direction of the rotary shaft (1) in an inclined mode towards the direction away from the rotary shaft (1), and the rotary shaft (1) abuts against the abutting surface.

2. The electromagnetic bearing rotor system according to claim 1, characterized in that the auxiliary bearing assembly (4) further includes an annular abutment (45) provided in the connection hole, both end surfaces of the annular abutment (45) in the axial direction of the rotating shaft (1) being formed into the abutment surfaces;

the outer wall of the rotating shaft (1) is provided with an abutting part extending towards the annular abutting piece (45), and the abutting part abuts against the abutting surfaces at two ends of the annular abutting piece (45).

3. The electromagnetic bearing rotor system according to claim 2, characterized in that a mounting portion (46) extending toward an axial direction near the rotating shaft (1) is provided on a wall of the connecting hole, the annular abutment member (45) includes a first abutment ring (451) and a second abutment ring (452), the first abutment ring (451) and the second abutment ring (452) being provided separately on both sides of the mounting portion (46) in an axial direction of the rotating shaft (1);

in an axial direction along the rotating shaft (1), one abutting surface is formed at each of the ends of the first abutting ring (451) and the second abutting ring (452) which are far away from each other.

4. Electromagnetic bearing rotor system according to claim 2, characterized in that the outer wall of the rotating shaft (1) is provided with two abutment bushings (12) in a spacer sleeve, the two abutment bushings (12) together forming the abutment;

an installation gap is formed between the two abutting bushes (12), and the annular abutting piece (45) is positioned in the installation gap and abuts against the two abutting bushes (12).

5. The electromagnetic bearing rotor system according to claim 2, wherein the resilient member (44) is a spring;

and/or, the annular abutment (45) is a graphite ring.

6. The electromagnetic bearing rotor system according to claim 1, wherein the mounting base (2) comprises a mounting sleeve (21) and end covers (22) covering two ends of the mounting sleeve (21), mounting holes are formed in the axial positions of the end covers (22), the rotating shaft (1) is arranged on the mounting sleeve (21) in a penetrating manner, and two ends of the rotating shaft (1) penetrate out of the mounting holes in the end covers (22) positioned at two ends of the mounting sleeve (21);

the auxiliary bearing assembly (4) is arranged in the mounting sleeve (21) at a position close to the end cover (22), and the gap is formed between the outer ring valve seat (41) and the end cover (22).

7. The electromagnetic bearing rotor system according to claim 6, characterized in that the auxiliary bearing assembly (4) further comprises a compression flange (47), the compression flange (47) being provided on the outer circumferential side of the outer ring valve seat (41) and being partially pressed on the side of the outer ring valve seat (41) facing away from the end cap (22);

the compression flange (47) is connected with the end cover (22) through a fastener (49).

8. The electromagnetic bearing rotor system according to claim 7, characterized in that the side of the compression flange (47) and the outer ring valve seat (41) facing the end cap (22) together form a mounting groove, which forms the void.

9. Electromagnetic bearing rotor system according to any one of claims 1 to 7, characterized in that the number of auxiliary bearing assemblies (4) is two, two auxiliary bearing assemblies (4) being provided separately at positions of the mounting base (2) near both ends of the rotating shaft (1).

10. The electromagnetic bearing rotor system according to any one of claims 1 to 7, characterized in that the electromagnetic bearing assembly (3) comprises an axial electromagnetic bearing (32), the axial electromagnetic bearing (32) comprising a thrust disc (32 a) and two axial electromagnetic bearing stators (32 b), the thrust disc (32 a) being sleeved on the rotating shaft (1), the two axial electromagnetic bearing stators (32 b) being provided separately on both sides of the thrust disc (32 a) in the axial direction of the rotating shaft (1);

the thrust disc (32 a) is formed with the connecting hole that is used for supplying pivot (1) wears to establish along the axis position department of pivot (1), the pore wall in connecting hole is followed the axial orientation of pivot (1) is kept away from the direction slope of pivot (1) is extended, the pivot (1) correspond be provided with the connecting bush on the outer wall in connecting hole, the extending direction of connecting bush's lateral wall with the extending direction phase-match of the pore wall in connecting hole.