CN111503148B

CN111503148B - Manual connecting rod slider protection bearing device

Info

Publication number: CN111503148B
Application number: CN202010250652.6A
Authority: CN
Inventors: 俞成涛; 谢超祥; 孙月梅; 陈宇; 王秀英
Original assignee: Jiangsu University of Technology
Current assignee: Jiangsu University of Technology
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2021-09-24
Anticipated expiration: 2040-04-01
Also published as: CN111503148A

Abstract

The invention relates to the field of magnetic suspension bearing systems, in particular to a manual connecting rod sliding block bearing protection device. A manual connecting rod slider protective bearing device comprising: a bearing disposed on the rotor; the two sliding blocks are symmetrically assembled on the periphery of the bearing in a sliding manner; the drive rod is connected with the two sliders through two groups of driven connecting rods respectively, and the drive rod can swing to drive the two sliders to face the bearing to slide so as to clamp the bearing. The technical problems that in the prior art, the bearing protection device cannot manually eliminate gaps and is low in safety are solved.

Description

Manual connecting rod slider protection bearing device

Technical Field

The invention relates to the field of magnetic suspension bearing systems, in particular to a manual connecting rod sliding block bearing protection device.

Background

Under the conditions of power failure or overload and the like, the magnetic suspension bearing system can lose the bearing capacity of the rotor, so a set of protective bearing device needs to be installed to provide temporary support for the rotor without support, the rotor rotating at high speed is prevented from falling on the stator, and the safety of the whole magnetic suspension system is ensured. At present, a traditional rolling bearing is mostly adopted as a protection bearing used in a magnetic suspension system, but in order to enable the magnetic suspension system to work normally, a fixed gap exists between a rotor and an inner ring of the rolling bearing. Therefore, when the rotor is dropped, since the gap between the rotor and the bearing cannot be eliminated, the bearing may be greatly impacted and vibrated by the rotor, resulting in damage to the protective bearing. The protective bearings capable of eliminating the clearance still have many defects, the structure is complex, only radial clearance can be eliminated, the reliability is not high, and if the clearance cannot be eliminated in time, the whole magnetic bearing system is damaged.

There are some protection bearing devices in the prior art, which can play a role of supporting the rotor, for example, the application with the application number CN201910000858.0 discloses an electromagnetic adsorption type protection bearing device, and specifically discloses: in the initial state, the electromagnetic driving assembly and the rotor are in a power-off state, at the moment, the electromagnetic adsorption piece does not generate acting force on the driving piece, the driving piece extends into an opening between the supporting piece and the supporting seat under the action of the elastic piece, and pushes the supporting piece to be close to and contact with the bearing to support the rotor; under the working state, the electromagnetic driving assembly and the rotor are both powered on, the coil generates magnetic attraction force to drive the driving piece to move towards the electromagnetic adsorption piece by overcoming the acting force of the elastic piece, the driving piece is separated from the opening, the supporting piece radially moves towards the supporting seat under the resetting action of the elastic resetting piece and finally abuts against the supporting seat, a gap exists between the inner surface of the supporting piece and the bearing, and the rotor can rotate at a high speed. As can be seen from the above, the above-mentioned bearing protection device can protect the bearing by switching on and off the state of the electric control bearing, i.e. it can automatically protect the bearing in an emergency. Once the automatic protective bearing device is in a failure state or under the condition of non-power-on and power-off triggering, the automatic protective bearing device cannot play a role in protecting the bearing any more.

Therefore, in order to expand the application prospect of the magnetic suspension bearing, a reliable manual protection bearing device is researched, the bearing device can be matched with an automatic protection bearing device to monitor the magnetic bearing, if unstable falling and other conditions occur, the gap can be manually eliminated, the safety is improved, and the device plays an important role in the development of the magnetic bearing.

Disclosure of Invention

In order to overcome the defects of a bearing protection device in the prior art, the invention provides a manual connecting rod sliding block bearing protection device which can be matched with an automatic bearing protection device to manually eliminate gaps and improve safety. The technical scheme of the invention is as follows:

a manual connecting rod slider protective bearing device comprising: a bearing disposed on the rotor; the two sliding blocks are symmetrically assembled on the periphery of the bearing in a sliding manner; the drive rod is connected with the two sliders through two groups of driven connecting rods respectively, and the drive rod can swing to drive the two sliders to face the bearing to slide so as to clamp the bearing.

By arranging the two sliding blocks to be symmetrical and assembled on the periphery of the bearing in a sliding manner, when the rotor works normally, a gap can be reserved between the sliding blocks and the bearing, and the rotor can rotate normally; when the rotor is unstable, the driving rod can be operated manually, the two groups of driven connecting rods are driven by the driving rod, the two sliding blocks are driven to slide towards the bearing so as to clamp the bearing, and the protection effect is achieved.

According to one embodiment of the invention, the end face of the slider facing the bearing has two inclined surfaces, the two inclined surfaces forming a V-shaped surface.

According to one embodiment of the invention, the sliding block is slidably mounted on a frame, the frame having a sliding slot formed therein, the sliding block being slidable in a radial direction in cooperation with the sliding slot.

According to one embodiment of the invention, the connecting end of the driving rod has two branches, which are connected to the two sliders by two sets of follower links, respectively.

According to one embodiment of the invention, the driving rod is located outside one slider, a first branch of the driving rod is connected with an end face, far away from the bearing, of an adjacent slider through a first set of driven connecting rods, and a second branch of the driving rod is connected with an end face, far away from the bearing, of a far slider through a second set of driven connecting rods.

According to one embodiment of the invention, the first set of follower links comprises a first link, the first branch of the drive rod being hinged to one end of the first link, the other end of the first link being hinged to the slider.

According to an embodiment of the present invention, the second group of driven links includes a second link, a third link and a fourth link connected in sequence, the second branch is hinged to one end of the second link, the other end of the second link extends to the outer side of the farther slider and is hinged to one end of the third link, the third link is hinged to the outer side of the farther slider, the other end of the third link is hinged to one end of the fourth link, and the other end of the fourth link is hinged to the slider.

According to one embodiment of the invention, the third link is V-shaped, and the bend of the third link is hinge-fitted.

According to one embodiment of the invention, the driving end of the driving rod is provided with a limiting structure to limit the position of the driving rod.

According to one embodiment of the invention, the limiting structure comprises a fixedly assembled rack, the driving end of the driving rod is hinged with a limiting rod, and the limiting rod can be inserted into the teeth of the rack to limit the position of the driving rod.

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

1. according to the manual connecting rod sliding block bearing protection device, the two sliding blocks are symmetrically arranged and are assembled on the periphery of the bearing in a sliding mode, when the rotor works normally, a gap can be reserved between the sliding blocks and the bearing, and the rotor can rotate normally; when the rotor is unstable, the driving rod can be operated manually, the two groups of driven connecting rods are driven by the driving rod, the two sliding blocks are driven to slide towards the bearing so as to clamp the bearing, and the protection effect is achieved. The bearing protection device can be operated manually, and plays a role in supporting the rotor and protecting the bearing; the rotor is further provided with a bearing, when the two sliding blocks clamp the outer surface of the bearing, the rotor can continue to rotate for a period of time and stop slowly, so that the rotor is prevented from being damaged;

2. according to the manual connecting rod sliding block bearing protection device, the end face, facing the bearing, of the sliding block is provided with the two inclined planes, and the two inclined planes form the V-shaped surface, so that when the sliding block supports the bearing, at least two contact points are arranged between each sliding block and the outer surface of the bearing, and the sliding block is guaranteed to stably support the bearing; the sliding block slides along the sliding groove on the rack, so that the movement of the sliding block is limited, and the sliding block is not easy to deviate and can play a role in stably supporting the bearing;

3. according to the manual connecting rod sliding block protective bearing device, the driving rod is provided with two branches, the two branches drive the two sliding blocks to slide through the two groups of driven connecting rods respectively, when a rotor needs to be supported, the driving rod is swung to drive the two sliding blocks to move oppositely, and the bearing is clamped to support the rotor; when the rotor does not need to be supported, the driving rod can be swung in opposite phases, the driving rod drives the two sliding blocks to move back through the two groups of driven connecting rods, a gap is reserved between the two sliding blocks and the bearing, and the rotor can normally rotate;

4. the manual connecting rod sliding block bearing protection device can play a role of limiting the driving rod by arranging the limiting structure, so that the driving rod is kept in a required state. The limiting structure is particularly arranged to be a rack and a limiting rod, and the limiting rod can be inserted into teeth on the rack so that the driving rod can be kept in any state.

Drawings

FIG. 1 is a schematic structural view of a manual link slider protection bearing device of the present invention;

FIG. 2 is a rear view of the manual link slider protective bearing assembly;

FIG. 3 is a schematic structural diagram of a rack I;

FIG. 4 is a schematic structural diagram of a frame II;

FIG. 5 is a schematic view of the drive rod;

FIG. 6 is a schematic structural view of a third link;

in the figure: 1-a rotor; 11-a bearing; 2-a slide block; 21-inclined plane; 22-a lug; 3-a linkage assembly; 31-a drive rod; 311-first branch; 312 — a second branch; 32-a first set of driven links; 321-a first link; 33-a second set of driven links; 331-a second link; 332-a third link; 333-a fourth link; 4-a limiting structure; 41-a limiting rod; 42-a rack; 421-teeth; 5-a frame; 51-a frame I; 511-a first plane; 512-concave surface; 513 — a second plane; 514-a first base; 52-frame II; 521-a third plane; 522-a fourth plane; 523-a second base; 53-chute; 54-circular through hole.

Detailed Description

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

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

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

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

Spatially relative terms such as "above … …", "above … …", and the like may be used herein for ease of description,

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

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

As shown in fig. 1-6, the present embodiment provides a manual link slider protection bearing device, which is installed on the outer periphery of a rotor 1, and under normal conditions, there is a gap between the manual link slider protection bearing device and the outer periphery of the rotor 1, and under the action of a radial magnetic bearing, the rotor 1 can be in a radial balance state, and the rotor 1 can rotate at a high speed under the driving of a motor; when the magnetic suspension system is powered off or fails, the manual connecting rod sliding block protective bearing device can play a role in supporting the rotor 1 and protecting the radial magnetic bearing. The motor can be positioned in the middle of the rotor 1, and the two radial magnetic bearings are symmetrically arranged on the two axial sides of the motor.

Manual connecting rod slider protection bearing device is including setting up bearing 11 on rotor 1 and the slider 2 of distribution in the periphery of bearing 11, and slider 2 is two, and two sliders 2 can slide towards bearing 11 simultaneously under the drive of link assembly 3 to the outer peripheral face of centre gripping bearing 11 rotates support rotor 1. The bearing 11 may be selected from, but not limited to, rolling bearings.

The slider 2 is two, and two even and symmetric distribution of slider 2 are in the periphery of bearing 11, and slider 2 is by the sliding assembly, and slider 2 slides along radial orientation bearing 11 under link assembly 3's drive. Specifically, an end surface of the slider 2 near the bearing 11 may be in surface contact with the bearing 11, or each slider 2 may be in at least two point contacts with the bearing 11 to ensure that the two sliders 2 can stably clamp the bearing 11. In this embodiment, the end surface of the slider 2 close to the bearing 11 has two inclined surfaces 21, the two inclined surfaces 21 form a V-shaped surface, and by providing the V-shaped surface, each slider 2 can form two supporting points with the outer peripheral surface of the bearing 11. The end face of the slider 2 remote from the bearing 11 is provided with a lug 22 for connection to the connecting-rod assembly 3.

The connecting rod assembly 3 plays a role in driving the sliding of the sliding blocks 2, the connecting rod assembly 3 comprises a driving rod 31 and two groups of driven connecting rods, and the driving rod 31 is respectively connected with the two sliding blocks 2 through the two groups of driven connecting rods so as to drive the two sliding blocks 2 to move in opposite directions or in a back-to-back direction. The driving rod 31 is positioned at the outer side of one sliding block 2 and is hinged and assembled on the frame 5, the connecting end of the driving rod 31 is provided with two branches, namely a first branch 311 and a second branch 312, the first branch 311 is connected with the adjacent sliding block 2 through a first group of driven connecting rods 32, and the second branch 312 is connected with the farther sliding block 2 through a second group of driven connecting rods 33; when the driving rod 31 swings along the hinge point, the two sliding blocks 2 can be driven by the two groups of driven connecting rods to move oppositely so as to rotate the supporting bearing 11; when drive rod 31 is along its pin joint reverse beat, two sliders 2 of accessible two sets of driven connecting rod drive move mutually away from each other, have the clearance between the outer peripheral face of slider 2 and bearing 11, but rotor 1 high-speed rotation.

Specifically, the hinge point of the driving rod 31 hinged to the frame 5 is located at the branch of the two branches, the first group of driven links 32 includes a first link 321, the first link 321 extends linearly, the first branch 311 is hinged to one end of the first link 321, and the other end of the first link 321 is hinged to the lug 22 on the adjacent slide block 2; the second group of driven links 33 comprises a second link 331, a third link 332 and a fourth link 333, the second link 331 extends linearly, the second branch 312 is hinged with one end of the second link 331, the other end of the second link 331 extends to the outer side of the farther slider 2 and is hinged with one end of the third link 332, the third link 332 is hinged with the fourth link 333 at the other end of the third link 332, which is hinged on the frame 5, the fourth link 333 extends linearly, and the other end of the fourth link 333 is hinged with the lug 22 on the farther slider 2. Preferably, the third connecting rod 332 is in a V shape, and the bent portion of the third connecting rod 332 is hinged to the frame 5. When there is a gap between the slider 2 and the bearing 11, the first branch 311 and the first link 321 are bent, and the third link 332 and the fourth link 333 are bent, and the bending directions are opposite to each other. That is, when the first branch 311 and the second link 321 are bent upward, the third link 332 and the fourth link 333 are bent downward; when the first branch 311 and the second link 321 are bent downward, the third link 332 and the fourth link 333 are bent upward.

In order to limit the position of the sliding block 2, the device is further provided with a limiting structure 4 for limiting the position of the driving rod 31 and further limiting the position of the sliding block 2. The limiting structure 4 comprises a limiting rod 41 and a rack 42 which are arranged on the driving rod 31, the rack 42 is fixedly assembled on the rack 5, teeth 421 are distributed on the surface of the rack 42 facing the limiting rod 41, one end of the limiting rod 41 is hinged to the driving rod 31, and the other end of the limiting rod 41 is inserted into the teeth 421 of the rack 42 to limit the position of the driving rod 31. Preferably, the end of the stopper rod 41 engaged with the rack 42 has a triangular shape to facilitate insertion into the teeth 421.

The sliding block 2, the connecting rod assembly 3 and the limiting structure 4 are all arranged on the frame 5, and the frame 5 is sleeved on the periphery of the rotor 1 in a clearance mode to play a role in supporting each structure. Specifically, the frame 5 has a circular through hole 54 for the rotor 1 to pass through, two sliding grooves 53 formed on the frame 5 are respectively assembled with the two sliding blocks 2, and the connecting rod assembly 3 is arranged on the frame 5 and passes through a gap in the frame 5 to perform a driving function. For convenient assembly, the machine frame 5 is provided with a split structure, the machine frame 5 comprises a machine frame I51 and a machine frame II 52 which are matched with each other, the end surface of the machine frame I51 matched with the machine frame II 52 comprises a first plane 511, a concave surface 512, a second plane 513 and a first base 514 which are sequentially arranged along the vertical direction, the concave surface 512 is concave relative to the first plane 511 and the second plane 513 on the upper side and the lower side, the first plane 5111 is convex relative to the second plane 513, the end surface of the machine frame II 52 matched with the machine frame I51 comprises a third plane 521, a fourth plane and a second base 523 which are sequentially arranged along the vertical direction, when the first plane 511 and the third plane 521 are matched with each other, a sliding chute 53 is formed between the concave surface 512 and the third plane 521, the second plane 513 is opposite to the fourth plane 522 and is in clearance fit for the connecting rod assembly 3 to pass through and be connected with the farther sliding block 2, the first base 514 is positioned on the second base 523, the end surface of the first pedestal 514 meets the fourth plane 522.

Based on the structure, the working principle of the manual connecting rod sliding block protective bearing device of the embodiment is as follows:

when the system works normally, the rotor 1 rotates at a high speed, a gap exists between the two sliding blocks 2 and the outer surface of the bearing 11 on the rotor 1, and the rotor 1 can rotate normally;

when the system is in failure or other conditions needing to support the rotor are needed, the driving rod 31 can be driven to deflect manually, and the driving rod 31 respectively drives the two sliding blocks 2 to slide towards the bearing 11 along the sliding groove 53 through the two groups of driven connecting rods until the bearing 11 is clamped so as to rotatably support the rotor 1. If the state of the driving rod 31 needs to be maintained, the limiting rod 41 is inserted into the rack 42 to limit the driving rod 31;

when the system needs to operate normally, the driving rod 31 can be driven to swing reversely, the driving rod 31 drives the two sliding blocks 2 to slide away from the bearing 11 along the sliding groove 53 through the two groups of driven connecting rods, a gap exists between the sliding blocks 2 and the bearing 11, and the rotor 1 can rotate normally.

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

Claims

1. A manual connecting rod slider protection bearing device characterized in that includes:

a bearing (11), the bearing (11) being arranged on the rotor (1);

the number of the sliding blocks (2) is two, and the two sliding blocks (2) are symmetrically assembled on the periphery of the bearing (11) in a sliding mode;

the connecting rod assembly (3) comprises a driving rod (31), the driving rod (31) is assembled in a hinged mode, the driving rod (31) is connected with the two sliding blocks (2) through two groups of driven connecting rods respectively, and the driving rod (31) can swing to drive the two sliding blocks (2) to slide towards the bearing (11) so as to clamp the bearing (11);

the connecting end of the driving rod (31) is provided with two branches which are respectively connected with the two sliding blocks (2) through two groups of driven connecting rods; the driving rod (31) is positioned at the outer side of one sliding block (2), a first branch (311) of the driving rod (31) is connected with the end face, far away from the bearing (11), of the adjacent sliding block (2) through a first group of driven connecting rods (32), and a second branch (312) of the driving rod (31) is connected with the end face, far away from the bearing (11), of the far sliding block (2) through a second group of driven connecting rods (33); the first group of driven connecting rods (32) comprises a first connecting rod (321), a first branch (311) of the driving rod (31) is hinged with one end of the first connecting rod (321), and the other end of the first connecting rod (321) is hinged with the sliding block (2); the second group of driven connecting rods (33) comprises a second connecting rod (331), a third connecting rod (332) and a fourth connecting rod (333) which are connected in sequence, the second branch (312) is hinged with one end of the second connecting rod (331), the other end of the second connecting rod (331) extends to the outer side of the farther slide block (2) and is hinged with one end of the third connecting rod (332), the third connecting rod (332) is hinged and assembled on the outer side of the farther slide block (2), the other end of the third connecting rod (332) is hinged with one end of the fourth connecting rod (333), and the other end of the fourth connecting rod (333) is hinged with the slide block (2); the third connecting rod (332) is in a V shape, and the bent part of the third connecting rod (332) is hinged; the hinged point of the driving rod (31) hinged on the frame (5) is positioned at the branch of the two branches; when a gap exists between the sliding block (2) and the bearing (11), the first branch (311) and the first connecting rod (321) are bent, the third connecting rod (332) and the fourth connecting rod (333) are bent, and the bending directions of the first branch and the fourth connecting rod are opposite.

2. A hand-operated connecting rod slide protection bearing arrangement according to claim 1, characterized in that the end surface of the slide (2) facing the bearing (11) has two inclined surfaces (21), the two inclined surfaces (21) forming a V-shaped surface.

3. A hand-operated connecting rod slider protective bearing device according to claim 1, characterized in that the slider (2) is slidably mounted on a frame (5), a slide groove (53) is formed on the frame (5), and the slider (2) is slidably fitted with the slide groove (53) in the radial direction.

4. A hand-operated link slider protective bearing device according to any of claims 1-3, characterized in that the driving end of the driving rod (31) is provided with a limit structure (4) to limit the position of the driving rod (31).

5. A manual connecting rod slider protection bearing device according to claim 4, characterized in that, the limit structure (4) comprises a fixedly assembled rack (42), the driving end of the driving rod (31) is hinged with a limit rod (41), the limit rod (41) can be inserted into the teeth (421) of the rack (42) to limit the position of the driving rod (31).