CN205559545U - Radial protection bearing device of one -way ball formula automatically removed rotor clearance - Google Patents
Radial protection bearing device of one -way ball formula automatically removed rotor clearance Download PDFInfo
- Publication number
- CN205559545U CN205559545U CN201620191904.1U CN201620191904U CN205559545U CN 205559545 U CN205559545 U CN 205559545U CN 201620191904 U CN201620191904 U CN 201620191904U CN 205559545 U CN205559545 U CN 205559545U
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- ball
- bearing
- rotor
- unidirectional
- radial
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Abstract
The utility model belongs to the technical field of radially protect the bearing device technique and specifically relates to a radial protection bearing device of one -way ball formula automatically removed rotor clearance. Include the rotor, radially protect bearing and bearing frame, should draw together antifriction bearing by a radial protection axle contracting, still include ball, annular connecting piece, one -way sleeve and baffle. The utility model discloses became invalid at magnetic suspension bearing system, the rotor falls the back, but radial clearance's protection bearing device between automatically removed rotor and the gyro wheel has just also eliminated the radial clearance between rotor and the antifriction bearing in other words to eliminated to antifriction bearing's impact and vibration after the rotor falls, improved reliability and the security of protecting the bearing, in order to satisfy high -speed magnetic suspension bearing system needs.
Description
Technical field
This utility model relates to radial protection bearing device technical field, and a kind of unidirectional ball-type eliminates the radial protection bearing device of rotor clearance automatically.
Background technology
In magnetic levitation bearing system, it is generally required to a set of protection bearing (also referred to as auxiliary bearing, replacement bearing, holding bearing or emergent bearing) lost efficacy or under the emergency case such as fault as temporary support in system cut-off, overload, control system.Bidirectional rolling type eliminates the protection bearing in rotor radial gap automatically radially can bear load, it is ensured that the rotor of high speed rotating not stationary part with system collides and rubs, to ensure the safety and reliability of whole system.Traditional protection design bearing is usually and is assemblied in bearing block by rolling bearing, and the magnetic suspension bearing arranged between inner ring and the rotor of the rolling bearing required radial clearance that normally works is generally the half of rotor and radial magnetic bearing radial clearance.Therefore; being severely affected and vibrate during protection bearing working, simultaneously because rotor cannot eliminate the gap between protection bearing and rotor after falling, the ability of protection bearing opposing shock and vibration is poor; it is easily caused it to damage, so that causing the major accident that magnetic levitation bearing system damages.Therefore, protection bearing the most always governs magnetic levitation bearing system application and the principal element of development.
Owing to the rotating speed of magnetic levitation bearing system is the highest, and between rotor and protection bearing, there is bigger radial clearance, cause rotor can produce the biggest impact and vibration when dropping on protection bearing.Having a kind of method at present is by being covered with rolling bearing in rotor assembly circumference, after rotor assembly falls, by the motion of periphery rolling bearing to eliminate gap, but its structure is extremely complex, the most only support falling when rotor assembly rotates along a direction, and owing to root diameter is much larger than the diameter of periphery rolling bearing, causes and fall the Later Zhou Dynasty, one of the Five Dynasties to the rotating speed of rolling bearing much larger than himself limit speed, do not tackle the problem at its root.
Utility model content
In order to overcome the deficiency of existing technology, this utility model provides a kind of unidirectional ball-type and automatically eliminates the radial protection bearing device of rotor clearance.
This utility model solves its technical problem and be the technical scheme is that a kind of unidirectional ball-type eliminates the radial protection bearing device of rotor clearance automatically; including rotor, radially protection bearing and bearing block; this radial direction protection bearing includes rolling bearing, also includes ball, circular connector, unidirectional sleeve and baffle plate；
Wherein,
Described rolling bearing, housing washer is installed in bearing block, by bearing gland axial compression；
Described baffle plate, axial distribution is in unidirectional sleeve both sides, and consistent with unidirectional sleeve is installed on rolling bearing inner ring in an interference fit, its axial location being intended to limit ball；
Described unidirectional sleeve, is installed on rolling bearing inner ring in an interference fit, and unidirectional sleeve inner circumferential surface configuration is the repetition arc section corresponding with ball number, and each arc section is gradually reduced along rotor rotation direction with the radial distance at device center；
Described ball, is axially placed in the axial centre position of unidirectional sleeve, and ball and device center are for being arranged concentrically, and ball outer round surface contacts with one-way-sleeve tube inner surface, there is radially portable protective gaps L1 between ball inner circle and rotor；It addition, ball includes that the ball split of more than 2, each ball split are placed in circular connector in the through hole arranged；
Described circular connector, is circumferentially evenly arranged with the through hole corresponding with ball number in circular connector, the diameter of through hole is less than the diameter of ball, and the central diameter of circular connector is less than all ball split centers diameter of a circle.
According to another embodiment of the present utility model, farther including, described bearing block is fixing with support to be connected, and rolling bearing is placed in bearing block.
According to another embodiment of the present utility model, farther including, described rolling bearing gland is fixedly connected with the bearing seat by screw, axial compression rolling bearing.
According to another embodiment of the present utility model, farther including, described ball split is 2-200.
According to another embodiment of the present utility model, farther including, described circular connector is the annulus that can allow certain elastic deformation, realizes ball by circular connector deformation and radially has certain displacement.
According to another embodiment of the present utility model, farther include, the composite that described radial direction protection bearing is metal or carbon fibers/fiberglass is made.
The beneficial effects of the utility model are; the present invention is after magnetic levitation bearing system inefficacy, rotor fall; can automatically eliminate the protection bearing arrangement of radial clearance between rotor and roller; also the radial clearance eliminating between rotor and rolling bearing it is equivalent to; thus eliminate after rotor falls the shock and vibration to rolling bearing; improve reliability and the safety of protection bearing, to meet high-speed magnetic levitation bearing arrangement needs.
Accompanying drawing explanation
With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation that a kind of unidirectional ball-type of the present invention eliminates the radial protection bearing device of rotor clearance automatically.
Fig. 2 is the A-A sectional view in Fig. 1.
In figure: 1, rotor, 2, circular connector, 3, ball, 4, unidirectional sleeve, 5, baffle plate, 6, rolling bearing, 7, bearing gland, 8, screw, 9, bearing block.
Detailed description of the invention
Accompanying drawing discloses the structural representation of preferred embodiment involved in the present invention without limitation；Technical scheme is explained below with reference to accompanying drawing.
As depicted in figs. 1 and 2; a kind of unidirectional ball-type of the present invention eliminates the radial protection bearing device of rotor clearance automatically; including rotor 1, radially protection bearing and bearing block 9, this radial direction protection bearing includes rolling bearing 6, circular connector 2, ball 3, unidirectional sleeve 4 and baffle plate 5；Rolling bearing 6 outer ring is installed in bearing block 9, by bearing gland 7 axial compression；Unidirectional sleeve 4 is installed on rolling bearing 6 inner ring in an interference fit, and unidirectional sleeve 4 inner circumferential surface configuration is the repetition arc section corresponding with ball 3 number, and each arc section is gradually reduced along rotor 1 rotation direction with the radial distance at device center；Baffle plate 5 axial distribution is in unidirectional sleeve 4 both sides, and consistent with unidirectional sleeve 4 is installed on rolling bearing 6 inner ring in an interference fit, its axial location being intended to limit ball 3；Ball 3 is axially placed in the unidirectional axial centre position of sleeve 4, and ball 3 and device center are for being arranged concentrically, and ball 3 outer round surface contacts with unidirectional sleeve 4 inner surface, there is radially portable protective gaps L1 between ball 3 inner circle and rotor 1；It addition, ball 3 includes ball 3 split of more than 2, the split of each ball 3 is placed in circular connector 2 in the through hole arranged；Circumferentially being evenly arranged with the through hole corresponding with ball 3 number in circular connector 2, the diameter of through hole is less than the diameter of ball 3, and the central diameter of circular connector 2 is less than all ball 3 split centers diameter of a circle；
Bearing block 9 is fixing with support to be connected, and rolling bearing 6 is placed in bearing block 9；Bearing gland 7 is connected by screw 8 is fixing with bearing block 9, axial compression rolling bearing 6；Ball 3 split is 2-200；Circular connector 2 is the annulus that can allow certain elastic deformation, realizes ball 3 by circular connector 2 deformation and radially has certain displacement.
When magnetic suspension bearing normally works, circular connector 2 make all ball 3 split moment be in unidirectional sleeve 4 inner surface arc section distance means radially distance far from, i.e. at ball 3 split position A shown in Fig. 1；Uniform gap is there is so that protection bearing arrangement does not disturb the normal rotation of rotor 1 between all ball 3 split inner circles and rotor 1.Additionally, so that the gap uniformity between the split of all balls 3 and rotor 1 is equal, must assure that during installation that the split of each ball 3 is arranged concentrically with rotor 1, i.e. must assure that the center of rolling bearing 6, unidirectional sleeve 4, ball 3 and rotor 1 four is in same straight line.
It addition, in the present embodiment, circular connector 2 is the annulus that can allow certain elastic deformation, realizes ball 3 by circular connector 2 deformation and radially there is certain displacement.
When magnetic levitation bearing system normally works, the radial clearance size between ball 3 internal circular surfaces and rotor 1 is about 0.15 mm, and both are not in contact with each other, and rotor 1 is high speed rotating, and ball 3 remains static together with rolling bearing 6 inner ring；After magnetic suspension bearing lost efficacy, rotor 1 falls, rotor 1 and part ball 3 split contact-impact, the frictional force produced between ball 3 split and rotor 1 drives ball 3 split to produce relative rolling on unidirectional sleeve 4 inner circumferential surface along rotor 1 rotation direction, owing to the split of all balls 3 is connected by circular connector 2, as long as having the split of a ball 3 to produce relative rolling with unidirectional sleeve 4 all, other ball 3 splits are inevitable produces identical relative rolling simultaneously；The radial distance being set to device center due to the arc section inner surface in unidirectional sleeve 4 is gradually reduced along rotor 1 rotation direction, so when after ball 3 split with rotor 1 making contact, the split of all balls 3 is radially proximating the central motion of device, this motion makes the gap between the split of all balls 3 and rotor 1 reduce rapidly, when the split of all balls 3 is all rolled at the B of position at the relative position A of unidirectional sleeve 4 inner surface arc section, gap between ball 3 split and rotor 1 is i.e. reduced to zero, thus eliminate the radial clearance between rotor 1 and all balls 3 split, it is equivalent to eliminate the radial clearance between rotor 1 and rolling bearing 6 inner ring.Eliminate impact and vibration to protection bearing after rotor falls, be remarkably improved in magnetic levitation bearing system the life-span radially protecting bearing.
The operation principle of the present invention is:
During installation, utilize the circular connector 2 acting on ball 3 split so that ball 3 split is in the initial position (position A) of unidirectional sleeve 4 inner surface, and makes the split of each ball 3 all in this initial position by circular connector 2 effect.When magnetic levitation bearing system is properly functioning; the split of all balls 3 is in initial position all the time; remain static together with unidirectional sleeve 4, circular connector 2 and rolling bearing 6 inner ring, now between rotor 1 and each ball 3 split, there are the normal portable protective gaps of magnetic levitation bearing system (typically about 0.15 mm).After magnetic levitation bearing system lost efficacy, rotor 1 falls rear and part ball 3 split making contact, now rotor 1 and ball 3 and between on the one hand there is the biggest relative velocity, on the other hand there is impact force effect, the frictional force that impact force between rotor 1 with ball 3 produces makes part ball 3 split take place along the relative rolling of rotor rotation direction at unidirectional sleeve 4 inner surface, by the effect of circular connector 2, other ball 3 splits can produce identical rolling relative to unidirectional sleeve 4 the most simultaneously.Owing to unidirectional sleeve 4 inner circumferential surface is arranged to the repetition arc section corresponding with ball 3 number; each arc section is gradually reduced along rotor 1 rotation direction with the radial distance at device center; so rotor 1 and ball 3 collision rift; the split of all balls 3 is radially proximating the central motion of device; when ball 3 along the radial distance of unidirectional sleeve 4 inner circumferential surface scrolls equal in magnitude with radially portable protective gaps time (ball 3 is rolled to relative position B), be equivalent to eliminate the radial clearance between rotor 1 and ball 3.Now; be equivalent to all balls 3 together with circular connector 2, rolling bearing 6 along with rotor 1 the most still around magnetic levitation bearing system normally work time center of rotation rotate; the collision of rotor and protection bearing i.e. will not occur; also protection bearing will not be produced repeated stock and vibration, improve the life-span of protection bearing.
Claims (6)
1. a unidirectional ball-type eliminates the radial protection bearing device of rotor clearance automatically; including rotor (1), radially protection bearing and bearing block (9); this radial direction protection bearing includes rolling bearing (6), also includes ball (3), circular connector (2), unidirectional sleeve (4) and baffle plate (5)；
Wherein,
Described rolling bearing (6), rolling bearing (6) outer ring is installed in bearing block (9), by bearing gland (7) axial compression；
Described baffle plate (5), axial distribution is in unidirectional sleeve (4) both sides, and consistent with unidirectional sleeve (4) is installed on rolling bearing (6) inner ring in an interference fit, its axial location being intended to limit ball (3)；
It is characterized in that,
Described unidirectional sleeve (4), it is installed on rolling bearing (6) inner ring in an interference fit, unidirectional sleeve (4) inner circumferential surface configuration is the repetition arc section corresponding with ball number, and each arc section is gradually reduced along rotor rotation direction with the radial distance at device center；
Described ball (3); axially it is placed in unidirectional sleeve (4) axially centre position; ball (3) and device center are for being arranged concentrically, and ball (3) outer round surface contacts with unidirectional sleeve (4) inner surface, there is radially portable protective gaps L1 between ball (3) inner circle and rotor (1)；It addition, ball (3) includes that the ball split of more than 2, each ball split are placed in circular connector (2) in the through hole arranged；
Described circular connector (2), circular connector is circumferentially evenly arranged with the through hole corresponding with ball number in (2), and the diameter of through hole is less than the diameter of ball, and the central diameter of circular connector is less than all ball split centers diameter of a circle.
Unidirectional ball-type the most according to claim 1 eliminates the radial protection bearing device of rotor clearance automatically, it is characterized in that, described bearing block (9) is fixing with support to be connected, and rolling bearing (6) is placed in bearing block (9).
Unidirectional ball-type the most according to claim 1 eliminates the radial protection bearing device of rotor clearance automatically, it is characterized in that, described bearing gland (7) is connected by screw (8) and bearing block (9) are fixing, axial compression rolling bearing (6).
Unidirectional ball-type the most according to claim 1 eliminates the radial protection bearing device of rotor clearance automatically, it is characterized in that, described ball split is 2-200.
Unidirectional ball-type the most according to claim 1 eliminates the radial protection bearing device of rotor clearance automatically; it is characterized in that; described circular connector (2) is the annulus that can allow certain elastic deformation, realizes ball in the structure radially with certain displacement by circular connector deformation.
Unidirectional ball-type the most according to claim 1 eliminates the radial protection bearing device of rotor clearance automatically, it is characterized in that, the composite that described radial direction protection bearing is metal or carbon fibers/fiberglass is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620191904.1U CN205559545U (en) | 2016-03-14 | 2016-03-14 | Radial protection bearing device of one -way ball formula automatically removed rotor clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620191904.1U CN205559545U (en) | 2016-03-14 | 2016-03-14 | Radial protection bearing device of one -way ball formula automatically removed rotor clearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205559545U true CN205559545U (en) | 2016-09-07 |
Family
ID=56817623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620191904.1U Expired - Fee Related CN205559545U (en) | 2016-03-14 | 2016-03-14 | Radial protection bearing device of one -way ball formula automatically removed rotor clearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205559545U (en) |
-
2016
- 2016-03-14 CN CN201620191904.1U patent/CN205559545U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20170314 |