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 technical field of electromagnetic bearings, and in particular, to an electromagnetic bearing rotor system.

Background technique

As a novel support component, electromagnetic bearings have the advantages of no contact, no wear, no lubrication, high speed, low noise, intelligent control, etc. It is another revolutionary change in the bearing industry after oil lubrication and gas lubrication. In recent years, Gradually used in industry, aerospace and other fields. Since the electromagnetic bearing will be unstable during use, when the electromagnetic bearing fails, the rotating shaft will have a drop impact, causing damage to the electromagnetic bearing or the rotating shaft. Therefore, the rotor system of electromagnetic bearings is usually equipped with protective bearings. When the rotating shaft falls, it first falls on the auxiliary bearing, thereby acting as a buffer to protect the rotating shaft and electromagnetic bearings.

However, in practical applications, electromagnetic bearing rotor systems are often used in high-speed or heavy-load equipment. After the electromagnetic bearing fails, the auxiliary bearing will bear a huge impact load, causing damage to the auxiliary bearing and failure of the protection of the electromagnetic bearing.

Contents of the invention

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

The present disclosure provides an electromagnetic bearing rotor system, which includes a rotating shaft and a mounting base. An electromagnetic bearing assembly and an auxiliary bearing assembly are coaxially arranged on the mounting base. The rotating shaft is coaxially disposed between the electromagnetic bearing assembly and the auxiliary bearing. on components;

The auxiliary bearing assembly includes an outer ring valve seat, an inner ring valve seat and an auxiliary bearing. The outer ring valve seat is connected to the outer ring of the auxiliary bearing, and the inner ring valve seat is connected to the inner ring of the auxiliary bearing. ;

A gap is formed between the outer ring valve seat and the mounting seat along the axial direction of the rotating shaft. An elastic member is provided in the gap. The inner ring valve seat is provided with a thread for the rotating shaft to pass through. A connecting hole, with an abutting surface formed on the wall of the connecting hole, the abutting surface extending obliquely in a direction away from the rotating shaft along the axial direction of the rotating shaft, the rotating shaft abutting against the abutting surface .

Optionally, the auxiliary bearing assembly further includes an annular abutment member disposed in the connection hole, and the two end surfaces of the annular abutment member along the axial direction of the rotating shaft are formed as the abutment surfaces;

The outer wall of the rotating shaft has a contact portion extending toward the annular contact member, and the contact portion is in contact with the contact surfaces at both ends of the annular contact member.

Optionally, the hole wall of the connecting hole has a mounting portion extending toward an axial direction close to the rotating shaft, and the annular abutting member includes a first abutting ring and a second abutting ring, the first abutting ring. The connecting ring and the second abutting ring are respectively provided on both sides of the mounting part along the axial direction of the rotating shaft;

In the axial direction along the rotating shaft, ends of the first abutting ring and the second abutting ring that are far away from each other form one abutting surface respectively.

Optionally, two abutment bushings are provided at intervals on the outer wall of the rotating shaft, and the two abutment bushes jointly form the abutment portion;

An installation gap is formed between the two abutment bushings, and the annular abutment piece is located in the installation gap and abuts with the two abutment bushings.

Optionally, the mounting base includes a mounting sleeve and end caps located at both ends of the mounting sleeve. A mounting hole is provided at the axis of the end cap, and the rotating shaft is passed through the mounting sleeve. on, and both ends of the rotating shaft pass through the mounting holes on the end caps located at both ends of the mounting sleeve;

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

Optionally, the auxiliary bearing assembly further includes a pressing flange, which is provided on the outer peripheral side of the outer ring valve seat and is partially pressed on the end of the outer ring valve seat facing away from the said end. one side of the lid;

The compression flange and the end cover are connected through fasteners.

Optionally, the pressing flange and the side of the outer ring valve seat facing the end cover together form a mounting groove, 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 located at the positions of the mounting base close to both ends of the rotating shaft.

Optionally, the elastic member is a spring;

And/or, the annular abutting member is a graphite ring.

Optionally, the electromagnetic bearing assembly includes an axial electromagnetic bearing, the axial electromagnetic bearing includes a thrust plate and two axial electromagnetic bearing stators, the thrust plate is sleeved on the rotating shaft, and the two shafts The electromagnetic bearing stator is arranged on both sides of the thrust plate along the axial direction of the rotating shaft;

A connecting hole for the rotating shaft to pass through is formed on the thrust plate along the axis of the rotating shaft. The hole wall of the connecting hole extends obliquely in a direction away from the rotating shaft along the axial direction of the rotating shaft. A connecting bushing is provided on the outer wall of the rotating shaft corresponding to the connecting hole, and the extending direction of the outer wall of the connecting bushing matches the extending direction of the hole wall of the connecting hole.

Compared with the existing technology, the technical solution provided by the present disclosure has the following advantages:

The electromagnetic bearing rotor system provided by the present disclosure coaxially disposes the electromagnetic bearing assembly and the auxiliary bearing assembly on the mounting seat, so that the rotating shaft is coaxially threaded on the electromagnetic bearing assembly and the auxiliary bearing assembly, so that the electromagnetic bearing assembly and the auxiliary bearing assembly Together they support the rotating shaft, and the auxiliary bearing assembly includes an outer ring valve seat, an inner ring valve seat and an auxiliary bearing. A gap is formed between the outer ring valve seat and the mounting seat along the axial direction of the rotating shaft, so An elastic piece is provided in the above gap, so that when the axial displacement deviation of the rotating shaft occurs relative to the mounting base, the axial displacement of the rotating shaft can be balanced by the elastic piece, thereby preventing the auxiliary bearing from bearing excessive axial load. At the same time, the connecting hole The hole wall is also formed with a contact surface extending obliquely in the direction away from the rotation shaft along the axial direction of the rotation shaft. The rotation shaft is in contact with the contact surface, so that a diameter of the rotation shaft relative to the mounting seat can be generated. When the axial displacement deviates, part of the load force is dispersed to the axial direction of the rotating shaft through the inclined abutment surface, and is balanced by the elastic member, thereby greatly reducing the radial load borne by the auxiliary bearing, thus not only protecting The function of the auxiliary bearing also further improves the support effect of the auxiliary bearing assembly on the rotating shaft, thereby better protecting the electromagnetic bearing assembly.

Description of the 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 technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those of ordinary skill in the art, It is said that other drawings can be obtained based on these drawings without exerting creative labor.

Figure 1 is a schematic structural diagram of an electromagnetic bearing rotor system according to an embodiment of the present disclosure;

Figure 2 is a schematic structural diagram of the auxiliary bearing assembly of the electromagnetic bearing rotor system according to the embodiment of the present disclosure;

Figure 3 is a schematic structural diagram of the axial electromagnetic bearing of the electromagnetic bearing rotor system according to the embodiment of the present disclosure.

Among them, 1. Rotating shaft; 11. Rotating shaft sleeve; 12. Contact bushing; 2. Mounting seat; 21. Mounting sleeve; 22. End cover; 3. Electromagnetic bearing assembly; 31. Radial electromagnetic bearing; 31a. Radial electromagnetic bearing rotor; 31b, radial electromagnetic bearing stator; 32, axial electromagnetic bearing; 32a, thrust plate; 32b, axial electromagnetic bearing stator; 4. auxiliary bearing assembly; 41, outer ring valve seat; 42, inner Ring valve seat; 43. Auxiliary bearing; 44. Elastic member; 45. Annular contact member; 451. First contact ring; 452. Second contact ring; 46. Installation part; 47. Pressure flange; 48 , Adjusting gasket; 49. Fasteners; 5. High-speed motor; 6. Radial electromagnetic bearing sensor; 7. Axial electromagnetic bearing sensor; 8. Connecting bushing.

Detailed ways

In order to understand the above objects, features and advantages of the present disclosure more clearly, the solutions of the present disclosure will be further described below. It should be noted that, as long as there is no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

Many specific details are set forth in the following description to fully understand the present disclosure, but the present disclosure can also be implemented in other ways different from those described here; obviously, the embodiments in the description are only part of the embodiments of the present disclosure, and Not all examples.

As shown in Figures 1-3, this embodiment provides an electromagnetic bearing rotor system, which includes a rotating shaft 1 and a mounting base 2. An electromagnetic bearing assembly 3 and an auxiliary bearing assembly 4 are coaxially arranged on the mounting base 2, and the rotating shaft 1 is coaxially arranged. On the electromagnetic bearing assembly 3 and the auxiliary bearing assembly 4.

Exemplarily, 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, where the radial electromagnetic bearing 31 is used for support. The axial electromagnetic bearing 32 is used to support the radial load of the rotating shaft 1 .

The radial electromagnetic bearing 31 and the axial electromagnetic bearing 32 both rotatably support the rotating shaft 1. The radial electromagnetic bearing 31 generates a radial magnetic force along the rotating shaft 1 after being energized, and the axial electromagnetic bearing 32 generates a magnetic force along the axial direction of the rotating shaft 1 after being energized. . The radial magnetic force generated by the radial electromagnetic bearing 31 and the axial magnetic force generated by the axial electromagnetic bearing 32 both suspend and support the rotating shaft 1 in a non-contact manner, so that there is no mechanical connection between the rotating shaft 1 and the radial electromagnetic bearing 31 and the axial electromagnetic bearing 32. Contact, thereby ensuring that the radial electromagnetic bearing 31 and the axial electromagnetic bearing 32 sleeved on the rotating shaft 1 have no mechanical wear.

Exemplarily, at least one radial electromagnetic bearing 31 and axial electromagnetic bearing 32 are provided. In this embodiment, two axial electromagnetic bearings 32 and one radial electromagnetic bearing 31 are provided, and two axial electromagnetic bearings 32 are provided. They are respectively located at the two ends of the mounting base 2 close to the rotating shaft 1 .

The electromagnetic bearing rotor system also includes a high-speed motor 5 and a controller. The high-speed motor 5 is used to drive the rotating shaft 1 to rotate. When in use, the electromagnetic bearing rotor system can be placed vertically or horizontally. The high-speed motor 5 is set on the mounting base 2, and Just connect it to the end of the rotating shaft 1.

In some embodiments, the 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 installed on the outer wall of the rotating shaft 1, and the radial electromagnetic bearing stator 31b is correspondingly arranged on the outer peripheral side of the radial electromagnetic bearing rotor 31a, with a gap formed between the radial electromagnetic bearing rotor 31a. Among them, the radial electromagnetic bearing rotor 31a has a cylindrical magnetic circuit inside, which is made of electric steel plates. It is fixed on the outer wall of the rotating shaft 1 and cooperates with the radial electromagnetic bearing stator 31b to achieve rotor suspension.

Exemplarily, the electromagnetic bearing rotor system also includes two radial electromagnetic bearings 31 sensors arranged corresponding to the two radial electromagnetic bearings 31 . The radial electromagnetic bearing 31 sensor is arranged on one side of the radial electromagnetic bearing 31 . When the electromagnetic bearing rotor system is working normally, the two radial electromagnetic bearing 31 sensors can collect the radial displacement signal of the rotating shaft 1 in real time. When the radial displacement deviation of the rotating shaft 1 occurs, the controller can change the two radial electromagnetic bearing 31 sensors according to the deviation signal sent by the sensor. radial electromagnetic bearing 31 to correct the radial position of the rotor.

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

Exemplarily, the electromagnetic bearing rotor system also includes an axial electromagnetic bearing 32 sensor. When the electromagnetic bearing rotor system is working normally, the axial electromagnetic bearing 32 sensor can collect the axial displacement signal of the rotating shaft 1 in real time. When the axial displacement deviation of the rotating shaft 1 occurs, the controller can change the thrust position based on the deviation signal sent by the sensor. The current in the axial electromagnetic bearing stator 32b of the two axial electromagnetic bearings 32 on both sides of the disk 32a changes the force of the two axial electromagnetic bearing stators 32b on the thrust disk 32a, so that the thrust disk 32a moves along the axis of the rotating shaft 1 Move in the direction, and drive the rotating shaft 1 to move, thereby correcting the axial position of the rotating shaft 1.

For example, when installing the above structures, radial electromagnetic bearings 31 can be installed at both ends of the rotating shaft 1 to support the rotation of the rotating shaft 1 . The axial electromagnetic bearing 32 is installed on the part of the rotating shaft 1 between the two radial electromagnetic bearings 31. The sensor of the axial electromagnetic bearing 32 is installed on one side of the axial electromagnetic bearing 32. The high-speed motor 5 is installed on the part of the rotating shaft 1. on the part between the two radial electromagnetic bearings 31. Of course, in other embodiments, other layout methods may also be used.

Moreover, along the axial direction of the rotating shaft 1 , there are a few gaps between the radial electromagnetic bearing rotor 31 a and the thrust plate 32 a , between the thrust plate 32 a and the axial electromagnetic bearing 32 sensor, between the axial electromagnetic sensor and the high-speed motor 5 , and between the high-speed motor 5 The limited fit with the radial electromagnetic bearing rotor 31a can be achieved through the sleeve of the rotating shaft 1.

Wherein, the auxiliary bearing assembly 4 includes an outer ring valve seat 41, an inner ring valve seat 42 and an auxiliary bearing 43. The outer ring valve seat 41 is connected to the outer ring of the auxiliary bearing 43, and the inner ring valve seat 42 Connected to 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, and an elastic member 44 is provided in the gap. The inner ring valve seat 42 is provided with a connecting hole for the rotating shaft 1 to pass through. An abutting surface is formed on the hole wall of the connecting hole. The abutting surface moves away from the rotating shaft 1 along the axial direction of the rotating shaft 1 . The direction of the rotating shaft 1 extends obliquely, and the rotating shaft 1 is in contact with the contact surface.

In specific implementation, when the electromagnetic bearing rotor system is in normal working condition, the axial electromagnetic bearing 32 sensor can collect the axial displacement signal of the rotating shaft 1 in real time. When an axial displacement deviation occurs, the controller can change the axial electromagnetic bearing stator. The current in the magnetic circuit in 32b is used to correct the axial position of the thrust plate 32a. When the axial electromagnetic bearing 32 fails, the 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. For example, the maximum axial displacement that allows the elastic member 44 to be compressed is less than the allowable gap value between the thrust plate 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 collect the radial displacement signal of the rotating shaft 1 in real time. When a radial displacement deviation occurs, the controller changes the current in the two radial electromagnetic bearing rotors 31a to correct the radial direction of the rotating shaft 1. Location. When the radial electromagnetic bearing 31 fails, since the rotating shaft 1 is in contact with the abutting surface on the inner ring valve seat 42, the radial load will be transmitted to the inner ring valve seat 42 through the abutting surface. The axial direction of the rotating shaft 1 extends obliquely in a direction away from the rotating shaft 1. Therefore, the load force will be dispersed to two directions along the axial direction and the radial direction of the rotating shaft 1. The radial load can be carried out through the auxiliary bearing 43. Bearing, the axial load can be transmitted to the auxiliary bearing 43 through the inner ring valve seat 42, and then transmitted to the outer ring valve seat 41 through the auxiliary bearing 43, and then buffered by the elastic member 44 to balance the load force.

In this process, the elastic member 44 mainly serves as the first line of defense to balance the load, and the auxiliary bearing 43 serves as the second line of defense to ensure the safety and reliability of the electromagnetic bearing rotor system. For example, the auxiliary bearing 43 may use a ball bearing. Of course, in other embodiments, the auxiliary bearing 43 may also use other forms of bearing structures.

In the electromagnetic bearing rotor system provided by this embodiment, the electromagnetic bearing assembly 3 and the auxiliary bearing assembly 4 are coaxially arranged on the mounting base 2, so that the rotating shaft 1 is coaxially disposed on the electromagnetic bearing assembly 3 and the auxiliary bearing assembly 4, so as to The electromagnetic bearing assembly 3 and the auxiliary bearing assembly 4 jointly support the rotating shaft 1, and the auxiliary bearing assembly 4 includes an outer ring valve seat 41, an inner ring valve seat 42 and an auxiliary bearing 43. The outer ring valve seat 41 and the A gap is formed between the mounting bases 2 along the axial direction of the rotating shaft 1 , and an elastic member 44 is provided in the gap, so that when the rotating shaft 1 is axially displaced relative to the mounting base 2 , the elastic member 44 can be used to adjust the rotating shaft 1 The axial displacement is balanced to prevent the auxiliary bearing 43 from bearing excessive axial load. At the same time, the hole wall of the connecting hole is also formed with an oblique extension along the axial direction of the rotating shaft 1 in a direction away from the rotating shaft 1 The rotating shaft 1 is in contact with the abutting surface, so that when the rotating shaft 1 produces a radial displacement deviation relative to the mounting seat 2, part of the load force can be dispersed to the rotating shaft 1 through the inclined abutting surface. axially upward and balanced by the elastic member 44, thereby greatly reducing the radial load borne by the auxiliary bearing 43, which not only protects the auxiliary bearing 43, but also further improves the resistance of the auxiliary bearing assembly 4 to the rotating shaft 1 Supporting effect, thereby better protecting the electromagnetic bearing assembly 3.

The electromagnetic bearing rotor system provided in this embodiment can be applied to an air compressor. When applied to an air compressor, the electromagnetic bearing rotor system is placed horizontally. Of course, in other embodiments, the electromagnetic bearing rotor system can also be used in other situations, such as the turbine rotor system of a nuclear reactor, the flywheel energy storage rotor system in regenerative braking energy, etc. When the rotor system is placed vertically, The axial load is generally large. In this case, the auxiliary bearing assembly 4 provided in this embodiment can better reflect its ability to balance the axial load.

In some embodiments, the elastic member 44 may use a spring. For example, the spring may be an annular spring wound around the outer ring of the rotating shaft 1 to provide a buffering effect in all directions. Of course, in other embodiments, the elastic member 44 may also adopt other types of structures, such as elastic gaskets.

Referring to FIG. 2 , in some embodiments, a stepped hole may be provided on the outer ring valve seat 41 to support the outer ring of the auxiliary bearing 43 to facilitate positioning and fixing of the auxiliary bearing 43 . Correspondingly, a stepped hole can also be provided on the outside of the inner ring valve seat 42 to support the inner ring of the auxiliary bearing 43 so as 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 the two auxiliary bearing assemblies 4 are respectively located at the two ends of the mounting base 2 close to the rotating shaft 1 . There are two auxiliary bearing assemblies 4, and they are respectively located at the two ends of the mounting base 2 close to the rotating shaft 1, which can support both ends of the rotating shaft 1 and withstand the impact when the rotating shaft 1 falls, thereby The effect of supporting and protecting the rotating shaft 1 is further improved.

For example, during installation, the two auxiliary bearing assemblies 4 can be disposed at the two ends of the mounting base 2 close to the rotating shaft 1, and the two radial electromagnetic bearings 31 are respectively installed on the rotating shaft 1 relative to the auxiliary bearings. Inside of component 4.

In some embodiments, the auxiliary bearing assembly 4 further includes an annular abutment 45 disposed in the connection hole, and the two end surfaces of the annular abutment 45 along the axial direction of the rotating shaft 1 are formed as described. As for the contact surface, the outer wall of the rotating shaft 1 has a contact portion extending toward the annular contact member 45 , and the contact portion is in contact with the contact surfaces at both ends of the annular contact member 45 .

By providing the annular contact piece 45, it is convenient for the inner ring valve seat 42 of the auxiliary bearing assembly 4 to make corresponding contact with the rotating shaft 1, and it is annular along the circumferential direction of the rotating shaft 1, which can provide abutting effects in all directions.

For example, the annular contact member 45 may be a graphite ring. The graphite ring is made of flexible graphite pressed by a mold and has the characteristics of high temperature resistance and wear resistance. It can also buffer the 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 close to the rotating shaft 1 , and the annular abutment 45 includes a first abutment ring 451 and a second abutment ring. 452. The first abutting ring 451 and the second abutting ring 452 are respectively provided on both sides of the mounting portion 46 along the axial direction of the rotating shaft 1, and are located along the axial direction of the rotating shaft 1. On the other hand, ends of the first abutment ring 451 and the second abutment ring 452 that are far away from each other form one abutment surface respectively.

For example, the mounting portion 46 is an annular protrusion extending from the hole wall of the connecting hole toward the axial direction of the rotating shaft 1. The two end surfaces of the mounting portion 46 along the axial direction of the rotating shaft 1 may be planes extending in the radial direction of the rotating shaft 1. One end of the first contact ring 451 and the second contact ring 452 is a flat surface, and the other end is a conical surface. The conical surface is in contact with the rotating shaft 1, so that when the rotating shaft 1 is subjected to an axial load, it will act. The force is transferred to the child mounting part 46 and divided into two axial and radial components by the inclined conical surface.

In some embodiments, two abutment bushings 12 are spaced on the outer wall of the rotating shaft 1 , and the two abutment bushes 12 jointly form the abutment portion. The two abutment bushes 12 An installation gap is formed between the two abutment bushings 12 , and the annular abutment piece 45 is located in the installation gap and abuts with the two abutment bushings 12 . This arrangement facilitates the abutment effect between the rotating shaft 1 and the annular abutting member 45 in both directions along the axis of the rotating shaft 1, and facilitates the installation and fixation of the structure.

In some embodiments, the mounting base 2 includes a mounting sleeve 21 and end caps 22 covering both ends of the mounting sleeve 21 . The end caps 22 are provided with mounting holes at their axis positions, and the rotating shaft 1 It is installed on the mounting sleeve 21 , and the two ends of the rotating shaft 1 pass through the mounting holes on the end caps 22 at both ends of the mounting sleeve 21 .

Moreover, the auxiliary bearing assembly 4 is disposed 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 . This arrangement facilitates the connection between the auxiliary bearing assembly 4 and the mounting base 2 . Of course, in other embodiments, the auxiliary bearing assembly 4 can also be arranged at other positions in the mounting sleeve 21 , for example, an extended structure is provided on the inner wall of the mounting sleeve 21 , and the auxiliary bearing assembly 4 corresponds to Make matching connections with the extended structure.

In some embodiments, the auxiliary bearing assembly 4 further includes a compression flange 47 , which is disposed on the outer peripheral side of the outer ring valve seat 41 and is partially pressed against the outer ring valve seat. The side of 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 to install and fix the auxiliary bearing assembly 4 and the end cover 22 to ensure the stability of the auxiliary bearing assembly 4 during use.

For example, the pressing flange 47 and the side of the outer ring valve seat 41 facing the end cover 22 together form a mounting groove, and the mounting groove forms the gap. The installation groove is provided to facilitate positioning of the elastic member 44 .

For example, an adjusting gasket 48 may be sandwiched between the pressing flange 47 and the outer ring valve seat 41 . The setting of the adjusting gasket 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 adjustment of the contact surface between the pressing flange 47 and the outer ring valve seat 41 by adjusting the thickness of the adjusting gasket 48. The distance between the outer ring valve seats 41.

Correspondingly, when installing the auxiliary bearing assembly 4, the auxiliary bearing 43 can be installed between the outer ring valve seat 41 and the inner ring valve seat 42 first, and then the auxiliary bearing 43, the outer ring valve seat 41 and the inner ring valve seat 42 can be integrated Secure with end cap 22 and mounting bushing in end cap 22. The elastic member 44 is placed in the installation groove formed by the pressing flange 47 and the outer ring valve seat 41, and then the fastener 49 is used to connect the elastic member 44 and the outer ring valve seat 41, between the elastic member 44 and the end cover 22 lock between them.

Among them, connecting bolts can be used as fasteners 49, and connecting screw holes are provided in the circumferential direction of the pressing flange 47. Mounting screw holes are also provided on the end cover 22 at positions corresponding to all connecting screw holes, and the connecting bolts are commonly threaded through Connect the screw holes to the mounting screw holes and secure with nuts. Moreover, the elastic member 44 can achieve different buffering forces by adjusting the tightening position of the connecting bolt.

In some embodiments, the thrust plate 32a of the axial electromagnetic bearing 32 is formed with a connecting hole for the rotating shaft 1 to pass through at an axial position along the rotating shaft 1 . Among them, the hole wall of the connecting hole extends along the axial direction of the rotating shaft 1 in a direction away from the rotating shaft 1, and a connecting bushing 8 is provided on the outer wall of the corresponding connecting hole of the rotating shaft 1. The extension direction of the outer wall of the connecting bushing 8 is in line with the connecting hole. The extension direction of the hole wall matches.

For example, a cylindrical hole is formed on the connecting bushing 8 along the axial direction of the rotating shaft 1 for sleeve matching with the rotating shaft 1 . The outer side wall of the connecting bushing 8 matches the hole wall of the connecting hole, that is, the extension direction of the outer side wall of the connecting bushing 8 is also along the axial direction of the rotating shaft 1 and extends away from the rotating shaft 1 , that is to say, the bushing For example, the outer surface can be configured as a tapered surface to cooperate with the inner wall of the connecting hole of the thrust plate 32a, thereby ensuring that the axis center position of the thrust plate 32a of the axial electromagnetic bearing 32 is centered, so as to reduce the use of the axial electromagnetic bearing 32. There is a possibility of radial unbalanced load.

It should be noted that in this article, relational terms such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is no such actual relationship or sequence between entities or operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

The above descriptions are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the disclosure. Therefore, the present disclosure is not to be limited to the embodiments 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, characterized in that it includes a rotating shaft (1) and a mounting seat (2). The mounting seat (2) is coaxially provided with an electromagnetic bearing assembly (3) and an auxiliary bearing assembly (4). , the rotating shaft (1) is jointly installed on the electromagnetic bearing assembly (3) and the auxiliary bearing assembly (4); The auxiliary bearing assembly (4) includes an outer ring valve seat (41), an inner ring valve seat (42) and an auxiliary bearing (43). The outer ring valve seat (41) and the outer ring of the auxiliary bearing (43) The inner ring valve seat (42) is connected to 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), and an elastic member (44) is provided in the gap. The inner ring valve The seat (42) is provided with a connecting hole for the rotating shaft (1) to pass through, and a contact surface is formed on the hole wall of the connecting hole, and the abutting surface is along the axial direction of the rotating shaft (1). It extends obliquely in a direction away from the rotating shaft (1), and the rotating shaft (1) is in contact with the contact 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) disposed in the connection hole, the annular abutment (45) Both end surfaces along the axial direction of the rotating shaft (1) are formed as the contact surfaces; The outer wall of the rotating shaft (1) has a contact portion extending toward the annular contact member (45), and the contact portion is in contact with the contact surfaces at both ends of the annular contact member (45). . 3. The electromagnetic bearing rotor system according to claim 2, characterized in that the hole wall of the connecting hole has a mounting portion (46) extending toward the axial direction close to the rotating shaft (1), and the annular resistor The connector (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 respectively located on the installation side. Both sides of the portion (46) along the axial direction of the rotating shaft (1); In the axial direction along the rotating shaft (1), ends of the first abutting ring (451) and the second abutting ring (452) that are far away from each other form one abutting surface respectively. 4. The electromagnetic bearing rotor system according to claim 2, characterized in that two abutment bushings (12) are arranged at intervals on the outer wall of the rotating shaft (1), and the two abutment bushings (12) are 12) Together, they form the abutment portion; An installation gap is formed between the two abutment bushings (12), and the annular abutment piece (45) is located in the installation gap and abuts with the two abutment bushings (12). . 5. The electromagnetic bearing rotor system according to claim 2, characterized in that the elastic member (44) is a spring; And/or, the annular abutment member (45) is a graphite ring. 6. The electromagnetic bearing rotor system according to claim 1, characterized in that the mounting seat (2) includes a mounting sleeve (21) and end caps (22) covering both ends of the mounting sleeve (21). ), the end cover (22) is provided with a mounting hole at the axis position, the rotating shaft (1) is passed through the mounting sleeve (21), and the two ends of the rotating shaft (1) are located at the Pass through the mounting holes on the end caps (22) at both ends of the mounting sleeve (21); The auxiliary bearing assembly (4) is arranged in the installation sleeve (21) at a position close to the end cover (22), between the outer ring valve seat (41) and the end cover (22). The gap is formed between them. 7. The electromagnetic bearing rotor system according to claim 6, characterized in that the auxiliary bearing assembly (4) further includes a pressing flange (47), the pressing flange (47) is provided with the outer ring The outer peripheral side of the valve seat (41), and is partially pressed against the side of the outer ring valve seat (41) facing away from the end cover (22); The compression flange (47) and the end cover (22) are connected through fasteners (49). 8. The electromagnetic bearing rotor system according to claim 7, characterized in that the pressing flange (47) and the side of the outer ring valve seat (41) facing the end cover (22) are the same. A mounting groove is formed, and the mounting groove forms the gap. 9. The electromagnetic bearing rotor system according to any one of claims 1 to 7, characterized in that the number of the auxiliary bearing assemblies (4) is two, and the two auxiliary bearing assemblies (4) are respectively located at The mounting base (2) is located close to 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) includes an axial electromagnetic bearing (32), and the axial electromagnetic bearing (32) It includes a thrust plate (32a) and two axial electromagnetic bearing stators (32b). The thrust plate (32a) is sleeved on the rotating shaft (1), and the two axial electromagnetic bearing stators (32b) are respectively located on the rotating shaft (1). Both sides of the thrust plate (32a) along the axial direction of the rotating shaft (1); A connecting hole for the rotating shaft (1) to pass through is formed on the thrust plate (32a) along the axis of the rotating shaft (1), and the hole wall of the connecting hole is along the axial direction of the rotating shaft (1). Extending obliquely in a direction away from the rotating shaft (1), a connecting bushing is provided on the outer wall of the rotating shaft (1) corresponding to the connecting hole, and the extending direction of the outer wall of the connecting bushing is in line with the connecting hole. The extension direction of the hole wall matches.