CN108443335B - Crank sliding block type radial protection bearing - Google Patents
Crank sliding block type radial protection bearing Download PDFInfo
- Publication number
- CN108443335B CN108443335B CN201810537875.3A CN201810537875A CN108443335B CN 108443335 B CN108443335 B CN 108443335B CN 201810537875 A CN201810537875 A CN 201810537875A CN 108443335 B CN108443335 B CN 108443335B
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- Prior art keywords
- bearing
- block
- motor
- rotor
- sliding block
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- 210000004907 gland Anatomy 0.000 claims abstract description 18
- 238000013461 design Methods 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Motor Or Generator Frames (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to the technical field of bearing design, in particular to a crank sliding block type radial protection bearing, which comprises a bearing, a bearing protection mechanism, a motor seat, a bearing seat, a gland and an outer end cover, wherein the bearing protection mechanism comprises a motor, a support, a connecting rod, an annular sliding block, a moving block, a stop block, a first spring and a second spring, the gland and the outer end cover are arranged on one side of the bearing, the motor seat and the bearing seat are arranged on the periphery of the bearing, the gland and the outer end cover are fixedly connected, the motor seat is fixedly connected with the bearing seat and the outer end cover respectively, the motor is arranged on the motor seat, the motor is in operation, the support rotates and drives the annular sliding block to move along the axial direction of a rotor through the connecting rod, the annular sliding block presses the stop block into a groove at the moment, then the moving block moves to enable the small-width block to move into a second chamber, and meanwhile, the inclined plane pushes the annular sliding block to move reversely along the axial direction, so that the end of the support is abutted against the bearing through the connecting rod, and the damage to the bearing caused by falling of the rotor is prevented.
Description
Technical Field
The invention relates to the technical field of bearing design, in particular to a crank sliding block type radial protection bearing.
Background
Because the magnetic bearing can lose the supporting capacity under the conditions of power failure and the like, once the rotor rotating at high speed falls on the stator, the whole bearing system can be seriously damaged, and in order to ensure the safety of the whole bearing system, a set of protection bearing needs to be additionally arranged to temporarily support the rotor under the condition of overload or failure of the magnetic suspension bearing.
The protection bearing is used as an indispensable protection device of the magnetic suspension bearing system, and is always one of important factors for limiting the development and application of the magnetic bearing. At present, a rolling bearing is mostly adopted as a protection bearing in a magnetic suspension system, however, huge vibration and impact force caused by rotor falling often exceed the limit which can be born by the rolling bearing, and the main reason is that the gap between the traditional protection bearing and the rotor is fixed, but the rotating speed of the magnetic suspension rotor is very high, so that the situation that the whole system is damaged due to the fact that the protection bearing cannot bear high-speed rotor impact frequently occurs in the application process of the magnetic suspension bearing. The existing novel protection bearings have some defects such as clearance elimination protection bearings, the structure is complex, the reliability cannot be guaranteed, or the novel protection bearings can only work under the condition that a control system is effective, once the magnetic suspension system is powered off and the like, and the protection bearings lose the function of clearance elimination when the control system does not work.
Therefore, in order to expand the application prospect of the magnetic suspension bearing, it is very significant to research a protection bearing which can actively eliminate the gap under the condition of overload and the like or can passively eliminate the gap under the condition of failure of a control system caused by power failure and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a crank sliding block type radial protection bearing, which can eliminate a protection gap between the protection bearing and a rotor when a rotor falls down due to failure of the magnetic suspension bearing, provide temporary support for the rotor, prevent damage caused by vibration and impact due to falling of the rotor, and improve the reliability of a magnetic suspension system.
The technical scheme adopted for solving the technical problems is as follows: the crank sliding block type radial protection bearing comprises a bearing, a bearing protection mechanism, a motor base, a bearing seat, a gland and an outer end cover, wherein the bearing is fixed on a rotor, the bearing protection mechanism comprises a motor, a bracket, a connecting rod, an annular sliding block, a moving block, a stop block, a first spring and a second spring, the gland and the outer end cover are arranged on one side of the bearing, the motor base and the bearing seat are arranged on the periphery of the bearing, the gland and the outer end cover are fixedly connected, the motor base is fixedly connected with the bearing seat and the outer end cover respectively, the motor is arranged on the motor base, a first chamber is reserved between the gland and the outer end cover, the first spring is arranged in the first chamber, the moving block is fixed on the outer end cover through the first spring to realize the elastic movement of the moving block in the radial direction of the rotor, a second chamber is reserved between the motor base and the outer end cover, the width of the second chamber in the axial direction of the rotor is smaller than that of the first chamber, the movable block is formed by splicing a large-width block body and a small-width block body, the large-width block body is connected with a first spring, the large-width block body is arranged in a first cavity, the overhanging end of the small-width block body extends into a second cavity, the side surface of the small-width block body is provided with a groove, a stop block is fixed in the groove through the second spring to realize elastic movement of the stop block along the axial direction of a rotor, the side surfaces of the large-width block body and the small-width block body are connected through an inclined plane, an annular slide block is arranged between a gland and a motor seat, one end of a support is connected with an output shaft of the motor, the other end of the support is hinged with a connecting rod, the other end of the connecting rod is hinged with one end of the annular slide block, the other end of the annular slide block is abutted against the stop block, the support rotates and drives the annular slide block to move along the axial direction of the rotor through the connecting rod when the motor works, and the annular slide block presses the stop block into the groove, the moving block then moves to move the small-width block into the second chamber, and the inclined surface pushes the annular sliding block to move reversely along the axial direction, so that the end of the bracket is propped against the bearing through the connecting rod back-pushing bracket.
The number of the motors is two, and the two motors are symmetrically arranged at the left side and the right side of the motor base.
The number of the brackets and the number of the connecting rods are the same and are more than two, all the brackets are arranged at intervals along the circumferential direction of the rotor, all the connecting rods are arranged at intervals along the circumferential direction of the rotor, the center line of the rotor and the center line of the annular sliding block coincide, wherein the two brackets are connected with the output shaft of the motor, and the other brackets are hinged and fixed on the motor base.
The support is a hammer, the end part of a handle of the hammer is connected with an output shaft of the motor, the side face of a hammer head of the hammer opposite to the handle is used for supporting and abutting against the bearing, the side face of the hammer head is formed by smoothly splicing an arc face and a plane, and the arc face takes the output shaft of the motor as a rotation center.
The beneficial effects are that: when the control system of the magnetic suspension bearing can normally run, a method for actively eliminating the protection gap is used, the motor is controlled to drive the support to rotate, the annular sliding block is pushed to axially slide by the connecting rod until the annular sliding block touches the stop block, the second spring is compressed, the whole stop block is pressed into the groove, the stop block is lack, and under the action of the first spring, the small-width block of the moving block is immediately pushed into the second chamber. In the moving process of the moving block, the inclined surface of the moving block pushes the annular sliding block to move reversely until the support is in contact with the bearing, and the rotor is placed in the center of the magnetic suspension system to play a role of supporting, so that the rotor is prevented from falling to damage the magnetic suspension bearing, and the reliability of the magnetic suspension system is improved.
When the control system of the magnetic suspension bearing is out of action, the protection bearing works in a mode of passively eliminating the clearance. After the rotor loses the support and falls, when the bearing impacts on any support, the annular sliding block is pushed to axially move until the annular sliding block contacts the stop block, the second spring is compressed, the whole stop block is pressed into the groove, the subsequent process is consistent with a method for actively eliminating a gap, and finally the support centers the rotor to play a role in supporting. The rotor is prevented from falling to damage the magnetic suspension bearing, and the service life of the magnetic suspension bearing is prolonged.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
fig. 3 is a sectional view in the direction B-B of fig. 2.
Detailed Description
The invention is further described below in connection with fig. 1-3.
The crank sliding block type radial protection bearing comprises a bearing 10, a bearing protection mechanism, a motor base 20, a bearing seat 30, a gland 40 and an outer end cover 50, wherein the bearing 10 is fixed on a rotor 60, the bearing protection mechanism comprises a motor 70, a bracket 80, a connecting rod 90, an annular sliding block 100, a moving block 110, a stop block 120, a first spring 130 and a second spring 140, the gland 40 and the outer end cover 50 are arranged on one side of the bearing 10, the motor base 20 and the bearing seat 30 are arranged on the periphery of the bearing 10, the gland 40 and the outer end cover 50 are fixedly connected, the motor base 20 is fixedly connected with the bearing seat 30 and the outer end cover 50 respectively, the motor 70 is arranged on the motor base 20, a first chamber is reserved between the gland 40 and the outer end cover 50, the first spring 130 is arranged in the first chamber, the moving block 110 is fixed on the outer end cover 50 through the first spring 130 to realize elastic movement of the moving block 110 in the radial direction of the rotor 60, a second chamber is reserved between the motor base 20 and the outer end cover 50, the width of the second chamber is smaller than that of the first chamber in the axial direction of the rotor 60, the moving block 110 is formed by splicing a large-width block 111 and a small-width block 112, the large-width block 111 is connected with a first spring 130, the large-width block 111 is arranged in the first chamber, the overhanging end of the small-width block 112 extends into the second chamber, the side surface of the small-width block 112 is provided with a groove, a stop block 120 is fixed in the groove through a second spring 140 to realize elastic movement of the stop block 120 along the axial direction of the rotor 60, the side surfaces of the large-width block 111 and the small-width block 112 are connected through an inclined surface 113, the annular slide block 100 is arranged between the gland 40 and the motor base 20, one end of the bracket 80 is connected with an output shaft of the motor 70, the other end of the bracket is hinged with the connecting rod 90, the other end of the connecting rod 90 is hinged with one end of the annular slide block 100, the other end of the annular slide block 100 is abutted against the stop block 120, when the motor 70 is operated, the bracket 80 rotates and drives the annular slide block 100 to move along the axial direction of the rotor 60 through the connecting rod 90, at this time, the annular slide block 100 presses the stop block 120 into the groove, then the moving block 110 moves to enable the small-width block 112 to move into the second chamber, and meanwhile, the inclined surface 113 pushes the annular slide block 100 to move reversely along the axial direction, so that the end of the bracket 80 is propped against the bearing 10 through the connecting rod 90 pushing the bracket 80 back.
When the protection bearing does not work, a certain gap exists between the support 80 and the bearing 10, namely, the support 80 is not contacted with the bearing 10, the stop block 120 is abutted against the motor base 20 due to the left and right elasticity of the second spring 140, and the inclined surface 113 of the moving block 110 is prevented from being contacted with the annular sliding block 100.
When the sensor finds that the rotor 60 and the bearing 10 are unstable, the protection bearing starts to work, and the working state of the protection bearing can be divided into two types: active and passive.
When the control system of the magnetic suspension bearing can normally operate, a method of actively eliminating the protection clearance is used, the motor 70 is controlled to drive the bracket 80, so that the bracket 80 rotates, the annular sliding block 100 is pushed to axially slide by the connecting rod 90 until the annular sliding block 100 touches the stop block 120, the second spring 140 is compressed, the whole stop block 120 is pressed into the groove, the stop block 120 is absent, and the small-width block 112 of the moving block 110 is immediately pushed into the second chamber under the action of the first spring 130. In the moving process of the moving block 110, the inclined plane 113 pushes the annular sliding block 100 to move reversely until the support 80 contacts with the bearing 10, and the rotor 60 is placed in the center of the magnetic suspension system to play a supporting role, so that the rotor 60 is prevented from falling to damage the magnetic suspension bearing, and the reliability of the magnetic suspension system is improved.
When the control system of the magnetic suspension bearing is out of action, the protection bearing works in a mode of passively eliminating the clearance. After the rotor 60 falls without support, when the bearing 10 impacts on any one of the brackets 80, the annular slide block 100 is pushed to move axially until the annular slide block 100 contacts the stop block 120, the second spring 140 is compressed, the whole stop block 120 is pressed into the groove, the following process is consistent with the method of actively eliminating the clearance, and finally the bracket 80 centers the rotor 60 to play a role of support. The rotor 60 is prevented from falling down to damage the magnetic suspension bearing, and the service life of the magnetic suspension bearing is prolonged.
Further, the number of the motors 70 is two, and the two motors 70 are symmetrically installed at the left and right sides of the motor base 20.
Preferably, the number of the brackets 80 and the number of the connecting rods 90 are the same and more than two, all the brackets 80 are arranged at intervals along the circumferential direction of the rotor 60, all the connecting rods 90 are arranged at intervals along the circumferential direction of the rotor 60, the center line of the rotor 60 coincides with the center line of the annular sliding block 100, two brackets 80 are connected with the output shaft of the motor 70, and the other brackets 80 are hinged and fixed on the motor base 20. The bracket 80 and the connecting rod 90 encircle the rotor 60, so that the rotor 60 is effectively protected.
Further, the support 80 is of a hammer type, the end of the handle of the hammer is connected with the output shaft of the motor 70, the side 81 of the hammer opposite to the handle is used for supporting against the bearing 10, the side 81 of the hammer is formed by smoothly splicing an arc surface 82 and a plane 83, and the arc surface 82 takes the output shaft of the motor 70 as a rotation center. The cambered surface 82 uses the output shaft of the motor 70 as a rotation center, and is used for ensuring that when the rotor 60 falls and contacts the support 80, the radial displacement of the rotor 60 cannot exceed the protection gap due to the rotation of the support 80.
It should be understood that the above-described specific embodiments are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications which extend from the spirit of the present invention are within the scope of the present invention.
Claims (2)
1. A crank slider formula radial protection bearing, its characterized in that: comprises a bearing (10), a bearing protection mechanism, a motor seat (20), a bearing seat (30), a gland (40) and an outer end cover (50), wherein the bearing (10) is fixed on a rotor (60), the bearing protection mechanism comprises a motor (70), a bracket (80), a connecting rod (90), an annular sliding block (100), a moving block (110), a stop block (120), a first spring (130) and a second spring (140), the gland (40) and the outer end cover (50) are arranged on one side of the bearing (10), the motor seat (20) and the bearing seat (30) are arranged on the periphery of the bearing (10), the gland (40) and the outer end cover (50) are fixedly connected, the motor seat (20) is fixedly connected with the bearing seat (30) and the outer end cover (50) respectively, a first chamber is reserved between the gland (40) and the outer end cover (50), the first spring (130) is arranged in the first chamber, the moving block (110) is fixed on the outer end cover (50) through the first spring (130), the elastic movement of the moving block (110) in the radial direction of the rotor (60) is realized, the second chamber (20) is reserved between the second chamber (60) and the second chamber (60) is reserved on the axial direction of the second chamber, the movable block (110) is formed by splicing a large-width block (111) and a small-width block (112), the large-width block (111) is connected with a first spring (130), the large-width block (111) is arranged in a first cavity, the overhanging end of the small-width block (112) extends into a second cavity, a groove is formed in the side face of the small-width block (112), the stop block (120) is fixed in the groove through a second spring (140) to realize elastic movement of the stop block (120) along the axial direction of the rotor (60), the side faces of the large-width block (111) and the small-width block (112) are connected through an inclined plane (113), the annular slide block (100) is arranged between the gland (40) and the motor base (20), one end of the bracket (80) is connected with an output shaft of the motor (70), the other end of the bracket (90) is hinged with one end of the annular slide block (100), the other end of the annular slide block (100) abuts against the stop block (120), when the motor (70) works, the bracket (80) rotates and drives the annular slide block (100) to move along the axial direction of the rotor (60) through the connecting rod (90) to enable the annular slide block (100) to move into the second cavity (110) to move, and then move into the annular slide block (100) along the axial direction of the rotor (60), simultaneously, the inclined surface (113) pushes the annular sliding block (100) to move reversely along the axial direction, so that the end part of the bracket (80) is propped against the bearing (10) through the connecting rod (90) and the bracket (80) and the bearing (10) have a gap when the annular sliding block is not in operation, the bracket (80) is not in contact with the bearing (10), the stop block (120) is propped against the motor base (20) due to the elastic force of the second spring (140), and the inclined surface (113) of the movable block (110) is prevented from being in contact with the annular sliding block (100);
wherein: the number of the motors (70) is two, and the two motors (70) are symmetrically arranged at the left side and the right side of the motor base (20);
wherein: the number of the brackets (80) and the number of the connecting rods (90) are the same and are more than two, all the brackets (80) are arranged at intervals along the circumferential direction of the rotor (60), all the connecting rods (90) are arranged at intervals along the circumferential direction of the rotor (60), the center line of the rotor (60) coincides with the center line of the annular sliding block (100), the two brackets (80) are connected with the output shaft of the motor (70), and the other brackets (80) are hinged and fixed on the motor base (20).
2. The crank block radial protection bearing according to claim 1, wherein: the support (80) is of a hammer type, the end part of a handle of the hammer is connected with an output shaft of the motor (70), a hammer head side surface (81) of the hammer opposite to the handle is used for supporting and abutting against the bearing (10), the hammer head side surface (81) is formed by smoothly splicing an arc surface (82) and a plane (83), and the arc surface (82) takes the output shaft of the motor (70) as a rotation center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810537875.3A CN108443335B (en) | 2018-05-30 | 2018-05-30 | Crank sliding block type radial protection bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810537875.3A CN108443335B (en) | 2018-05-30 | 2018-05-30 | Crank sliding block type radial protection bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108443335A CN108443335A (en) | 2018-08-24 |
| CN108443335B true CN108443335B (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810537875.3A Active CN108443335B (en) | 2018-05-30 | 2018-05-30 | Crank sliding block type radial protection bearing |
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| Country | Link |
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| CN (1) | CN108443335B (en) |
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| CN111396457B (en) * | 2020-03-13 | 2021-06-15 | 江苏理工学院 | Clamping type bearing protection device |
| CN111396460B (en) * | 2020-03-13 | 2021-06-15 | 江苏理工学院 | Gear transmission supporting and protecting bearing device |
| CN111396459B (en) * | 2020-03-27 | 2022-03-25 | 江苏理工学院 | Manual centre gripping formula protection bearing device |
| CN111911534B (en) * | 2020-07-01 | 2021-10-19 | 江苏理工学院 | Automatic trigger lever type bearing protection device |
| CN111981040B (en) * | 2020-07-25 | 2021-12-28 | 山东凯美瑞轴承科技有限公司 | Magnetic axial bearing |
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