CN216478457U

CN216478457U - Instability protection mechanism of magnetic suspension rotor

Info

Publication number: CN216478457U
Application number: CN202020570596.XU
Authority: CN
Inventors: 柳哲; 贺智威; 晏建; 孙永强
Original assignee: Candela Shenzhen New Energy Technology Co Ltd
Current assignee: Candela Shenzhen New Energy Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2020-04-16
Publication date: 2022-05-10
Anticipated expiration: 2030-04-16

Abstract

The application discloses a destabilization protection mechanism of a magnetic suspension rotor, which comprises a rotor and a protection assembly, wherein the protection assembly comprises a wear-resistant sleeve which is sleeved on the rotor and is connected with the rotor and a protection bearing which is sleeved on the wear-resistant sleeve and is arranged at intervals with the wear-resistant sleeve; wherein, be provided with first bolster between wear-resisting sleeve and the rotor in order to form the buffering clearance between wear-resisting sleeve and rotor. In this way, this application can effectively protect the rotor to prevent that the rotor from direct and protection bearing collision, friction and damage the rotor, and then improve the life-span and the persistence of rotor.

Description

Instability protection mechanism of magnetic suspension rotor

Technical Field

The application relates to the field of flywheel rotors, in particular to a destabilization protection mechanism of a magnetic suspension rotor.

Background

In a magnetic suspension bearing system, in order to ensure the safety and stability of the magnetic suspension bearing system, a group of protective bearings are usually additionally arranged on the magnetic suspension bearing system, and when the magnetic suspension bearing fails or is overloaded, the protective bearings can support a rotor system rotating at a high speed in a short time so as to prevent equipment from being damaged, and further, the safety and reliability of the whole system can be ensured.

In the prior art, a magnetic suspension protection bearing is mostly provided with a mechanical bearing, and a gap between the protection bearing and a rotor is relatively fixed, so that the following problems are easily caused after the magnetic suspension bearing fails or is overloaded:

1. the inverse vortex motion formed by the collision friction between the rotor rotating at high speed and the inner ring of the protective bearing after falling can intensify the violence degree of collision motion, thereby bringing huge vibration and impact to the protective bearing and causing the damage of the protective bearing; 2. the rotor falls down on the protective bearing to drive the protective bearing to rotate, and the rotor is easy to slip when being subjected to impact load in the acceleration process of the protective bearing, so that the surface of the inner ring of the protective bearing is rubbed and damaged, the service life of the protective bearing is greatly shortened, and the protection of the whole magnetic suspension bearing system is further influenced.

SUMMERY OF THE UTILITY MODEL

The application mainly provides a magnetic suspension rotor instability protection mechanism to solve the problem that a magnetic suspension bearing system cannot be well protected in the prior art.

In order to solve the technical problem, the application adopts a technical scheme that: the instability protection mechanism of the magnetic suspension rotor comprises a rotor and a protection assembly, wherein the protection assembly comprises a wear-resistant sleeve which is sleeved on the rotor and connected with the rotor, and a protection bearing which is sleeved on the wear-resistant sleeve and arranged at an interval with the wear-resistant sleeve; a first buffer piece is arranged between the wear-resistant sleeve and the rotor so as to form a buffer gap between the wear-resistant sleeve and the rotor; wherein the protection component is arranged at the end part of the rotor along the length direction of the rotating shaft.

According to an embodiment that this application provided, magnetic suspension rotor's unstability protection mechanism still includes the casing, the rotor with the protection subassembly set up in the casing, the protection bearing with still be provided with the second bolster between the casing.

According to an embodiment of the present disclosure, the first buffer member and the second buffer member are elastic dampers.

According to an embodiment of the present disclosure, the first buffer member and the second buffer member are elastic rings.

According to an embodiment that this application provided, magnetic suspension rotor's unstability protection mechanism still includes motor stator, motor stator set up in the casing, and the cover is located on the rotor, in order to be used for with rotor cooperation drive the rotor is rotatory around the rotation axis.

According to an embodiment of the present application, the instability protection mechanism of the magnetic suspension rotor further includes a magnetic bearing stator disposed in the housing and sleeved on the rotor for suspending the rotor relative to the motor stator, the magnetic bearing stator and the housing.

According to an embodiment of the present disclosure, the number of the magnetic bearing stators is two, and the two magnetic bearing stators are respectively disposed on two sides of the motor stator along a length direction of the rotating shaft.

According to an embodiment provided by the present application, a side of the wear-resistant sleeve close to the rotor is provided with a high-strength wear-resistant layer.

According to an embodiment provided by the present application, the material of the wear-resistant sleeve is one or more of chromium carbide, high manganese steel, tungsten carbide and titanium alloy.

According to an embodiment that this application provided, the protection subassembly is two sets of, two sets of protection subassembly sets up respectively in the rotor is followed the length direction's of rotation axis both ends.

The beneficial effect of this application is: be different from prior art's condition, wear-resisting sleeve and protection bearing are established through overlapping in proper order outside the rotor to this application, and be provided with first bolster between wear-resisting sleeve and the rotor in order to form the buffering clearance between wear-resisting sleeve and rotor, vibration and impact when first bolster can absorb the rotor and fall, thereby can improve the operating speed of protection bearing, thereby guarantee that first bolster can work together with the protection bearing, or first bolster just cushions the rotor earlier before the rotor collides the protection bearing, in order to protect the protection bearing.

Further, form the buffering clearance through setting up wear-resisting sleeve and through first bolster between wear-resisting sleeve and rotor, can further restrict the radial displacement of rotor, and when the radial displacement of rotor surpassed the buffering clearance, the rotor then can take place the rigidity with wear-resisting sleeve and strike to prevent that the radial displacement of rotor is too big to the unstability protection mechanism of whole magnetic suspension rotor from producing the damage. And through set up wear-resisting sleeve outside the rotor, can effectually protect the rotor to prevent that the rotor directly collides with protection bearing, rubs and damages the rotor, and then improve the life-span and the persistence of rotor.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic structural diagram of a first embodiment of a destabilization protection mechanism of a magnetic suspension rotor provided by the application;

fig. 2 is a schematic structural diagram of a partial area a of the destabilizing protection mechanism of the magnetic levitation rotor shown in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

Referring to fig. 1-2, the present application provides a magnetic levitation rotor instability protection mechanism 10, where the magnetic levitation rotor instability protection mechanism 10 includes a rotor 100 and a protection assembly 200. Wherein the rotor 100 can rotate around the rotation axis when working, and the protection component 200 is sleeved on the rotor 100.

As shown in fig. 2, the protective assembly 200 includes a wear sleeve 210 and a protective bearing 220. The wear-resistant sleeve 210 is sleeved on the rotor 100 and connected to the rotor 100, that is, the wear-resistant sleeve 210 can rotate along with the rotor 100 when the rotor 100 rotates. The protection bearing 220 is also sleeved on the wear-resistant sleeve 210 and spaced apart from the wear-resistant sleeve 210.

A first buffer 230 is disposed between the wear-resistant sleeve 210 and the rotor 100 to form a buffer gap between the wear-resistant sleeve 210 and the rotor 100. Specifically, the first buffer member 230 may absorb vibration and impact when the rotor 100 falls, so as to increase the operating speed of the protection bearing 220, thereby ensuring that the first buffer member 230 and the protection bearing 220 may operate together, or the first buffer member 230 buffers the rotor 100 before the rotor 100 collides with the protection bearing 220. And further, a buffering gap is formed between the wear-resistant sleeve 210 and the rotor 100 by providing the wear-resistant sleeve 210 and by the first buffering member 230. The radial displacement of the rotor 100 can be further limited, and when the radial displacement of the rotor 100 exceeds the buffer clearance, the rotor 100 can have a rigid impact with the wear-resistant sleeve 210, so as to prevent the damage of the entire magnetic suspension rotor instability protection mechanism 10 caused by the excessive radial displacement of the rotor 100. And through set up wear-resisting sleeve 210 outside rotor 100, can effectual rotor 100 protect to prevent rotor 100 directly with protection bearing 220 collision, friction and damage rotor 100, and then improve the life-span and the persistence of rotor 100.

In a specific embodiment, the first buffer 230 may be an elastic damper or an elastic ring, and specifically may be a first rubber ring, a squeeze film damper, an elastic wave ring, an electromagnetic damper, or the like.

As shown in fig. 1, the instability protection mechanism 10 of a magnetic levitation rotor further includes a housing 300, the rotor 100 and the protection assembly 200 are disposed in the housing 300, and a second buffer 240 is further disposed between the protection bearing 220 and the housing 300. The second buffer 240 may be an elastic damper or an elastic ring, specifically, a first rubber ring, a squeeze film damper, an elastic wave ring, an electromagnetic damper, or the like, similar to the first buffer 230.

Specifically, the protective bearing 220 may be specifically a ball bearing, a roller bearing, a sliding bearing, or the like. Taking a ball bearing as an example, the bearing can be a deep groove ball bearing or an angular contact bearing. Specifically, the inner ring and the outer ring of the protection bearing 220 can rotate relatively. Specifically, the inner ring of the protection bearing 220 and the wear-resistant sleeve 210 are arranged at an interval, and in a normal state, the inner ring of the protection bearing 220 does not contact with the wear-resistant sleeve 210, so that the rotation of the wear-resistant sleeve 210 cannot be followed, and under the condition that the rotor 100 falls, the radial displacement of the rotor 100 is possibly too large, so that the wear-resistant sleeve 210 and the inner ring of the wear-resistant sleeve 210 are driven to collide, the inner ring and the outer ring of the wear-resistant sleeve 210 are driven to rotate relatively, and the rotation kinetic energy of the rotor 100 is buffered and gradually released. The outer ring of the protection bearing 220 is fixed to the housing 300, and a second cushion 240 is disposed between the outer ring of the protection bearing 220 and the housing 300.

By providing the second buffer 240 between the protection bearing 220 and the housing 300, the rigid impact between the rotor 100 and the protection bearing 220 when the rotor 100 falls can be further reduced, and the rotor 100 and the housing 300 are further protected, so as to prevent the protection bearing 220 and the housing 300 from being directly damaged by the excessive rigid impact energy.

And form two buffers through setting up first bolster 230 and second bolster 240, thereby can effectual rotor 100 fall kinetic energy absorb, thereby reduce the collision impact force when wear-resisting sleeve 210 and protection bearing 220 striking, and then avoid the destruction to protection bearing 220 and casing 300, also can reduce the frictional force of wear-resisting sleeve 210 and protection bearing 220 inner circle simultaneously, the frictional force between each part of protection bearing 220, thereby reduce the wearing and tearing risk of parts such as protection bearing 220, and the service life is prolonged.

And further, the first buffer member 230 and the second buffer member 240 can buffer the impact energy when the rotor 100 falls, and can also be directly used as a limiting device for radially limiting the rotor 100, so as to prevent the instability protection mechanism 10 of the magnetic suspension rotor from being damaged due to the excessive radial displacement of the rotor 100.

In a particular embodiment, a side of the wear sleeve 210 proximate to the rotor 100 is provided with a high strength wear resistant layer. Specifically, the wear-resistant sleeve 210 is made of one or more of chromium carbide, high manganese steel, tungsten carbide, and titanium alloy. The wear-resistant sleeve 210 is integrally made of a high-strength material or a high-strength wear-resistant layer, so that the energy of the rotor 100 can be absorbed when the rotor 100 contacts with the wear-resistant sleeve, and the rotor 100 can directly impact and wear the inner ring of the protective bearing 220 in a contact manner.

As shown in fig. 1, the instability protection mechanism 10 of the magnetic levitation rotor further includes a motor stator 400, wherein the motor stator 400 is disposed in the housing 300 and sleeved on the rotor 100, so as to cooperate with the rotor 100 to drive the rotor 100 to rotate around a rotation axis.

As shown in fig. 1, the instability protection mechanism 10 of the magnetic levitation rotor further includes a magnetic bearing stator 500, and the magnetic bearing stator 500 is disposed in the housing 300 and sleeved on the rotor 100 for driving the rotor 100 to float relative to the motor stator 400. The magnetic bearing stators 500 are two in detail, and the two magnetic bearing stators 500 are respectively disposed at both sides of the motor stator 400 along a length direction of the rotation shaft.

In a particular embodiment, the magnetic bearing stator 500 cooperates with the rotor 100 by providing an electromagnetic force or other form of magnetic force, thereby levitating the rotor 100 relative to the magnetic bearing stator 500, the motor stator 400, and the housing 300.

In a specific embodiment, the protective assembly 200 is disposed at an end of the rotor 100 in a length direction of the rotation shaft. I.e. the protection assemblies 200 are specifically located at the ends of the rotor 100 along the length direction of the rotating shaft, in a specific embodiment, the protection assemblies 200 may be specifically two groups, and the two groups of protection assemblies 200 are respectively located at the two ends of the rotor 100 along the length direction of the rotating shaft, i.e. located at the outer sides of the two magnetic bearing stators 500.

In a specific scenario, the magnetic bearing stator 500 suspends the rotor 100 relative to the magnetic bearing stator 500 by providing electromagnetic force or other forms of magnetic force, and then the motor stator 400 drives the rotor 100 to rotate at high speed around the rotation axis, if the rotor is unstable due to failure, damage or loss of stability control of the magnetic bearing system, and the like, so that the rotor 100 may fall, and since the rotor 100 has a high rotation speed, the magnetic bearing stator 500 or the motor stator 400 may be directly impacted to damage the magnetic bearing stator 500 or the motor stator 400, in this application, by providing the protection assembly 200, a gap between the protection assembly 200 and the rotor 100 may be smaller than a gap between the magnetic bearing stator 500 and the rotor 100, and a gap between the protection assembly 200 and the rotor 100 may be smaller than a gap between the motor stator 400 and the rotor 100, and thus when the rotor 100 falls, the protection assembly 200 may now collide, on the one hand, the energy of the rotor 100 can be partially absorbed to reduce the damage to the rotor 100 and the protection assembly 200 caused by rigid collision, and on the other hand, the rotor 100 can be radially limited to prevent the rotor 100 from directly causing impact damage to the magnetic bearing stator 500 or the motor stator 400. Specifically, when the rotor 100 falls, energy is partially absorbed by the first buffer member 230, and if the radial displacement of the rotor 100 exceeds the buffer gap formed by the first buffer member 230, the wear-resistant sleeve 210 collides with the rotor 100 to further absorb the energy of the rotor 100, so as to reduce the rigid collision between the rotor 100 and the inner ring of the protection bearing 220, and to protect the inner ring of the protection bearing 220. Further, a second buffer 240 is disposed between the protection bearing 220 and the housing 300 to further absorb energy of the rotor 100, so as to prevent the rotor 100 from damaging the protection bearing 220 and the housing 300, and an inner ring and an outer ring of the protection bearing 220 can rotate relatively, so that the rotation speed of the rotor 100 is gradually reduced by the rotation of the inner ring and the rotor 100, and the rotor 100 is better protected.

To sum up, the application provides a magnetic suspension rotor's unstability protection mechanism, through be provided with first bolster 230 between wear-resisting sleeve 210 and rotor 100, first bolster 230 can absorb vibration and impact when rotor 100 falls, wear-resisting sleeve 210 can further absorb the rigid impact of rotor 100, protect protection bearing 220, and through be provided with second bolster 240 between protection bearing 220 and casing 300, can further reduce rotor 100 and fall the rigid impact of time and protection bearing 220, and then protect rotor 100 and casing 300, in order to prevent that the too big protective bearing 220 and casing 300 of rigid impact energy directly cause the damage.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims

1. The instability protection mechanism of the magnetic suspension rotor is characterized by comprising a rotor and a protection assembly, wherein the protection assembly comprises a wear-resistant sleeve which is sleeved on the rotor and connected with the rotor and a protection bearing which is sleeved on the wear-resistant sleeve and arranged at an interval with the wear-resistant sleeve;

a first buffer piece is arranged between the wear-resistant sleeve and the rotor so as to form a buffer gap between the wear-resistant sleeve and the rotor;

wherein, the protection component is arranged at the end part of the rotor along the length direction of the rotating shaft.

2. The mechanism of claim 1, further comprising a housing, wherein the rotor and the protection assembly are disposed in the housing, and a second buffer member is disposed between the protection bearing and the housing.

3. The destabilization protection mechanism of a magnetic levitation rotor as recited in claim 2, wherein the first and second buffers are elastic dampers.

4. The destabilization protection mechanism of a magnetic levitation rotor as recited in claim 2, wherein the first and second buffers are elastic rings.

5. The instability protection mechanism for a magnetic levitation rotor as recited in claim 2, further comprising a motor stator disposed in the housing and sleeved on the rotor for cooperating with the rotor to drive the rotor to rotate around a rotation axis.

6. The mechanism of claim 5, further comprising a magnetic bearing stator disposed within the housing for levitating the rotor relative to the motor stator, magnetic bearing stator and housing.

7. The mechanism of claim 6, wherein the number of the magnetic bearing stators is two, and the two magnetic bearing stators are respectively disposed at both sides of the motor stator along a length direction of the rotating shaft.

8. The mechanism of claim 1, wherein the wear sleeve is provided with a high strength wear resistant layer on a side adjacent to the rotor.

9. The instability protection mechanism for a magnetic levitation rotor as recited in claim 1, wherein the wear-resistant sleeve is made of one or more of chromium carbide, high manganese steel, tungsten carbide and titanium alloy.

10. The instability protection mechanism for a magnetic levitation rotor as recited in claim 1, wherein the protection assemblies are provided in two groups, and the two groups of protection assemblies are respectively provided at both ends of the rotor in the length direction of the rotating shaft.