CN114673728B - Permanent magnet thrust suspension bearing and control method thereof - Google Patents
Permanent magnet thrust suspension bearing and control method thereof Download PDFInfo
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- CN114673728B CN114673728B CN202011548020.4A CN202011548020A CN114673728B CN 114673728 B CN114673728 B CN 114673728B CN 202011548020 A CN202011548020 A CN 202011548020A CN 114673728 B CN114673728 B CN 114673728B
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- 239000000725 suspension Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 55
- 239000010959 steel Substances 0.000 claims abstract description 55
- 238000006073 displacement reaction Methods 0.000 claims abstract description 39
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000005415 magnetization Effects 0.000 claims 2
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 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
- 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
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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
- F16C32/0446—Determination of the actual position of the moving member, e.g. details of sensors
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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
- F16C32/0474—Active magnetic bearings for rotary movement
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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
- F16C2326/00—Articles relating to transporting
- F16C2326/30—Ships, e.g. propelling shafts and bearings therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a permanent magnet thrust suspension bearing and a control method thereof, wherein the permanent magnet thrust suspension bearing comprises: the device comprises a bearing stator, a bearing rotor, a driving device, a sensor and a control device; stator thrust magnetic steel is arranged in a stator shell of the bearing stator; rotor thrust magnetic steel is arranged outside a rotor cylinder of the bearing rotor; the driving device is connected with the bearing stator; the sensor is used for detecting axial displacement or axial force of the bearing rotor; the control device is connected with the sensor and the driving device; the sensor detects axial movement or axial stress of the bearing rotor, and the control device controls the running state of the driving device according to the monitoring result of the sensor, so that the driving device drives the bearing stator to move in the axial direction. The control method of the permanent magnet thrust suspension bearing is used for controlling the operation of the bearing. When the permanent magnet thrust suspension bearing is applied, a mechanical bearing with large bearing capacity is not required to be arranged in the axial direction, and the problems of high cost and large friction noise caused by arranging the mechanical bearing in the axial direction can be solved.
Description
Technical Field
The invention belongs to the technical field of permanent magnet suspension bearings, and particularly relates to a permanent magnet thrust suspension bearing and a control method thereof.
Background
The driving force for sailing on water ships and underwater ships is provided by the rotation of a propeller for draining water, and a shafting for connecting the propeller and a power device is positioned at the tail part of the equipment. The bearing system is required to be installed and consists of a plurality of bearings, and on one hand, the bearing system is required to provide radial supporting force for the propeller so as to overcome the self weight of the shafting; on the other hand, axial forces are generated to the shaft system when the propeller is being drained, and the bearing system needs to provide axial forces to balance the axial forces generated by the propeller. Because of the large tonnage of ships and warships, the weight of the propeller shaft system used for connection can reach tens of tons, and the traditional mechanical bearing with large size is needed, and the mechanical bearing needs to be continuously supplied with oil for lubrication in use, so that the equipment structure is complex and the volume and the weight are large. For underwater equipment such as ships, the stealth performance of the ships can be affected by friction running noise generated by using a traditional mechanical bearing.
In the prior art, there is a Magnetic suspension Bearing (Magnetic Bearing), which uses Magnetic force to suspend a Bearing rotor in the air, so that there is no mechanical contact between the Bearing rotor and a Bearing stator. A magnetic suspension bearing is an active electromagnetic suspension bearing, which utilizes the current in the electromagnet coil to generate controllable electromagnetic force without contact to make the bearing rotor operate in a space stable suspension state. The common active electromagnetic suspension bearing system consists of a radial magnetic bearing, an axial magnetic bearing, a sensor, a bearing rotor, a controller and a driving device. The working principle is as follows: the deviation signal of the bearing rotor shaft is detected through the position sensor, the controller calculates and outputs a control signal after receiving the signal, the coil current is controlled through the power amplifier, and the electromagnetic force is regulated, so that the bearing rotor is stably suspended at the working position. The active magnetic suspension bearing can be applied to small-size equipment such as fans, fans and the like which are required for high rotation speed. However, for large-scale equipment such as ships and ships, because the driving device is an electromagnet, the driving device can be driven to work by a large current, a large amount of energy is consumed for the operation of the bearing, the fuel carried by the ships and the ships is effective, the endurance of the equipment can be greatly influenced by the application of the active magnetic suspension bearing, and the active magnetic suspension bearing is difficult to be applied in practice. Meanwhile, the active magnetic suspension bearing which continuously consumes energy during operation is not in line with the industrial development direction of green production and green manufacturing, and the energy waste is serious.
Disclosure of Invention
The invention aims to provide a permanent magnet thrust suspension bearing and a control method thereof, which are used for solving the problem that an electromagnetic bearing is difficult to apply to the scenes such as a ship tail shaft and the like.
The technical scheme for solving the first technical problem is as follows: a permanent magnet thrust suspension bearing and a control method thereof, comprising: the device comprises a bearing stator, a bearing rotor, a driving device, a sensor and a control device; stator thrust magnetic steel is arranged in a stator shell of the bearing stator; rotor thrust magnetic steel is arranged outside a rotor cylinder of the bearing rotor; the driving device is connected with the bearing stator; the sensor is used for detecting axial displacement or axial force of the bearing rotor; the control device is connected with the sensor and the driving device; the sensor detects axial movement or axial stress of the bearing rotor, and the control device controls the running state of the driving device according to the monitoring result of the sensor, so that the driving device drives the bearing stator to move in the axial direction, and axial thrust for balancing the axial load of the bearing rotor is generated between the thrust magnetic steel of the bearing stator and the thrust magnetic steel of the bearing rotor.
The permanent magnet thrust suspension bearing disclosed by the invention further comprises a hydraulic driving device, a pneumatic driving device or an electric driving device.
The permanent magnet thrust suspension bearing disclosed by the invention is further characterized in that two sides of the bearing stator are fixedly connected with the lugs respectively; the hydraulic rod of the driving device is connected with the connecting lug, the driving device is a hydraulic driving device, the hydraulic rod is installed in a hydraulic cylinder, and the hydraulic cylinder is fixedly connected with the mounting seat.
The permanent magnet thrust suspension bearing disclosed by the invention further comprises the bearing stator thrust magnetic steel and the bearing rotor thrust magnetic steel which are annular neodymium iron boron magnetic steel, wherein the magnetizing direction of the magnetic steel is radial radiation magnetizing.
The permanent magnet thrust suspension bearing disclosed by the invention further has the advantages that the arrangement directions of the thrust magnetic steel magnetic poles of adjacent bearing stators are opposite; the arrangement directions of the thrust magnetic steel magnetic poles of adjacent bearing rotors are opposite; the arrangement direction of the thrust magnetic steel of the bearing rotor and the magnetic pole of the thrust magnetic steel of the bearing stator at the corresponding positions is opposite.
The invention provides a control method of a permanent magnet thrust suspension bearing, which comprises the following steps: step 1, acquiring axial displacement data of a shaft system where a bearing rotor is positioned; step 2, comparing whether the axial displacement data is in a set displacement threshold range, and generating an execution control signal according to a comparison result; step 3, the driving device adjusts the axial position of the bearing stator according to the execution control signal; step 4, repeating the steps 1-3 until the obtained axial displacement data value is smaller than the minimum value of the set displacement threshold range; the permanent magnetic thrust suspension bearing is any one of the permanent magnetic thrust suspension bearings.
The invention provides a control method of a permanent magnet thrust suspension bearing, which comprises the following steps of 1, obtaining axial force data of a shaft system where a bearing rotor is positioned; step 2, comparing whether the axial force data is in a set axial force threshold range, and generating an execution control signal according to a comparison result; step 3, the driving device adjusts the axial position of the bearing stator according to the execution control signal; step 4, repeating the steps 1-3 until the obtained axial force data value is smaller than the minimum value of the set axial force threshold range; the permanent magnetic thrust suspension bearing is any one of the permanent magnetic thrust suspension bearings.
The application of the permanent magnet thrust suspension bearing in large equipment such as ships and warships can solve the problems that the cost for arranging the mechanical bearing in the axial direction is high and the friction noise is large because the mechanical bearing with large bearing capacity is not required to be arranged in the axial direction.
Drawings
The foregoing and/or other advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative only and not limiting of the invention, wherein:
FIG. 1 is a schematic perspective view of a permanent magnet thrust suspension bearing according to one embodiment of the present invention;
FIG. 2 is a schematic top view of a permanent magnet thrust suspension bearing according to one embodiment of the present invention;
FIG. 3 is a schematic view in section A-A of FIG. 2;
FIG. 4 is a schematic view in section B-B of FIG. 2;
FIG. 5 is a schematic diagram of a drive device, a bearing stator, and a second force sensor of an embodiment;
FIG. 6 is a schematic illustration of a bearing rotor and bearing stator in a non-axial displacement state;
FIG. 7 is a schematic view of a bearing rotor and a bearing stator in an axially displaced state;
FIG. 8 is a schematic diagram of a control execution system according to an embodiment of the present invention;
FIG. 9 is a schematic flow chart of a method for controlling a permanent magnet thrust suspension bearing according to an embodiment of the present invention;
fig. 10 is a schematic diagram of stator axial displacement versus axial thrust.
In the drawings, the list of components represented by the various numbers is as follows:
10. the device comprises a bearing rotor, 20, a bearing stator, 30, a driving device, 101, a stator housing, 102, stator thrust magnetic steel, 103, rotor thrust magnetic steel, 104, a rotor barrel, 105, a shaft, 106, an auxiliary bearing, 107, a second displacement sensor, 108, a second force sensor, 201, a connecting lug, 202, a hydraulic rod, 203, a hydraulic cylinder, 204 and a mounting seat.
Detailed Description
Hereinafter, embodiments of a permanent magnet thrust suspension bearing and a control method thereof of the present invention will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present invention, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the invention to the embodiments and scope of the invention. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification of the present application, including those adopting any obvious substitutions and modifications to the embodiments described herein.
The drawings in the present specification are schematic views, which assist in explaining the concept of the present invention, and schematically show the shapes of the respective parts and their interrelationships. Note that, in order to clearly show the structures of the components of the embodiments of the present invention, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.
Fig. 1-6 illustrate a permanent magnet thrust suspension bearing of an embodiment of the present invention, comprising:
a bearing stator 20, a bearing rotor 10, a driving device 30, sensors and a control device;
a stator thrust magnetic steel 102 is arranged in a stator shell 101 of the bearing stator 20;
rotor thrust magnetic steel 103 is arranged outside a rotor cylinder 104 of the bearing rotor 10;
the driving device 30 is connected with the bearing stator 20;
the sensor is used for detecting the axial displacement or axial force of the bearing rotor 10;
the control device is connected with the sensor and the driving device 30; the sensor detects the axial movement or axial stress of the bearing rotor 10, and the control device controls the running state of the driving device 30 according to the monitoring result of the sensor, so that the driving device 30 drives the bearing stator 20 to move in the axial direction, and the axial thrust for balancing the axial load of the bearing rotor is generated between the thrust magnetic steel of the bearing stator 20 and the thrust magnetic steel of the bearing rotor 10.
In the embodiment shown in fig. 3, an auxiliary bearing 106 is also included, for example, the auxiliary bearing is a sliding bearing, within which the shaft can be axially moved;
referring to fig. 6, the axial positions of the bearing stator and the bearing rotor are initial positions, the magnetic forces between the radial magnetic steel of the bearing stator and the thrust magnetic steel of the bearing stator are balanced in the axial direction, and the acting force on the shaft is zero. As shown in fig. 7, when the bearing rotor receives the thrust force, the bearing rotor will be axially displaced, and the bearing stator thrust magnetic steel will generate a magnetic force on the bearing rotor thrust magnetic steel, the magnetic force is opposite to the axial displacement direction of the bearing rotor in the axial direction, and the larger the axial displacement, the larger the axial magnetic force. Therefore, when the axial displacement of the bearing rotor occurs, the displacement sensor detects the axial displacement of the bearing rotor, and the control device controls the state of the hydraulic integrated device, so that the cylinder rod arranged in the cylinder with the seat drives the bearing stator to axially move, and an axial force for resetting the bearing rotor is generated between the thrust magnetic steel of the bearing stator and the thrust magnetic steel of the bearing rotor. The application of the permanent magnet thrust suspension bearing in large equipment such as ships and warships can solve the problems that the cost for arranging the mechanical bearing in the axial direction is high and the friction noise is large because the mechanical bearing with large bearing capacity is not required to be arranged in the axial direction. In one embodiment, a marine or naval vessel apparatus is provided, the permanent magnet thrust suspension bearing of the above embodiment being mounted at a transmission location between the power take off end of the apparatus and the propeller shaft. The permanent magnet thrust suspension bearing is particularly suitable for underwater submarines, and is used for reducing noise generated in the advancing process of the submarines and improving the stealth performance and the combat capability of the submarines.
In one particular permanent magnet thrust suspension bearing embodiment, the drive 30 is a hydraulic drive 30, a pneumatic drive 30, or an electric drive. For example, in one particular permanent magnet thrust suspension bearing embodiment, the two sides of the bearing stator 20 are each fixedly connected to lugs 201; the hydraulic rod 202 of the driving device 30 is connected with the connecting lug 201, the hydraulic rod 202 is installed in the hydraulic cylinder 203, and the hydraulic cylinder 203 is fixedly connected with the installation seat 204. In one apparatus configuration, additional support frames and guide rails are provided, on which the bearing stators are mounted, the guide rails being slidable in guide slots of the support frames, and the drive means individually driving the bearing stators for movement. In this embodiment, need not to install extra supporting mechanism and guiding mechanism and support the bearing stator, abundant utilization pneumatic cylinder and hydraulic stem have avoided the setting of extra spare part, have not only reduced equipment cost, have also reduced the utilization of raw materials resource, accord with green production and green design theory.
In a preferred embodiment, a first displacement sensor or a first force sensor is mounted on the shaft system of the permanent magnet inferential suspension bearing where the shaft 105 is located, for detecting the axial displacement or the axial force of the shaft. To provide feedback on the operating state of the drive, a second displacement sensor 107 is mounted on a mounting, hydraulic cylinder or a separate sensor bracket. In the embodiment shown in fig. 2, the sensor is a displacement sensor 107, said displacement sensor 107 being fixed to the hydraulic cylinder 203. The second displacement sensor is connected with the control device.
In a second specific permanent magnet thrust suspension bearing embodiment, two sides of the bearing stator 20 are fixedly connected with lugs 201 respectively; one end of a hydraulic rod 202 of the driving device 30 is fixedly connected with a first connecting support lug 201, and the other end of the hydraulic rod can move in a guide hole of a second connecting support lug; the hydraulic rod 202 is installed in the hydraulic cylinder 203, and the hydraulic cylinder 203 is fixedly connected with the mounting seat 204. In a preferred embodiment, a first displacement sensor or a first force sensor is mounted on the shaft system of the permanent magnet inferential suspension bearing where the shaft 105 is located, for detecting the axial displacement or the axial force of the shaft. In order to provide feedback on the movement of the drive means, in the embodiment shown in fig. 5, a second force sensor 108 is provided, which is mounted on the hydraulic lever and which is connected to the control means.
By adding the second displacement sensor, the distance that the driving device pushes the bearing stator can be provided, and in combination with the illustration of fig. 10, the moving distance of the bearing stator is related to the axial thrust generated by the stator thrust magnetic steel and the rotor thrust magnetic steel within the adjustable range of the bearing stator, so that the bearing stator moving distance information or data provided by the second displacement sensor can be utilized to provide more accurate position adjustment of the bearing stator, and further provide more accurate axial thrust to balance the axial force generated by a propeller to a shaft system.
In a specific permanent magnet thrust suspension bearing embodiment, the thrust magnetic steel of the bearing stator 20 and the thrust magnetic steel of the bearing rotor 10 are annular neodymium-iron-boron magnetic steels, and the magnetizing direction of the magnetic steels is radial radiation magnetizing. For example, in one particular permanent magnet thrust suspension bearing embodiment, adjacent bearing stators 20 have opposite thrust magnet steel poles; the arrangement directions of the thrust magnetic steel magnetic poles of the adjacent bearing rotors 10 are opposite; the arrangement direction of the thrust magnetic steel of the bearing rotor and the magnetic pole of the thrust magnetic steel of the bearing stator at the corresponding positions is opposite. In a preferred embodiment, the bearing rotor thrust magnet steel is equal to the bearing stator thrust magnet steel in width, and the distance range for adjusting the axial thrust by moving the bearing stator is less than or equal to one half of the magnet steel width.
The control method of the permanent magnet thrust suspension bearing according to the first embodiment of the present invention, as shown in fig. 8 and 9, includes the following steps: step 1, acquiring axial displacement data of a shaft system where a bearing rotor 10 is positioned; step 2, comparing whether the axial displacement data is in a set displacement threshold range, and generating an execution control signal according to a comparison result; step 3, the driving device adjusts the axial position of the bearing stator 20 according to the execution control signal; step 4, repeating the steps 1-3 until the obtained axial displacement data value is smaller than the minimum value of the set displacement threshold range; the permanent magnetic thrust suspension bearing is any one of the permanent magnetic thrust suspension bearings.
The control method of the permanent magnet thrust suspension bearing according to the second embodiment of the present invention, as shown in fig. 8 and 9, includes the following steps: step 1, acquiring axial force data of a shaft system where a bearing rotor 10 is located; step 2, comparing whether the axial force data is in a set axial force threshold range, and generating an execution control signal according to a comparison result; step 3, the driving device adjusts the axial position of the bearing stator 20 according to the execution control signal; step 4, repeating the steps 1-3 until the obtained axial force data value is smaller than the minimum value of the set axial force threshold range; the permanent magnetic thrust suspension bearing is any one of the permanent magnetic thrust suspension bearings. In a further preferred embodiment of the control method, the method further comprises the steps of: and after the bearing design is finished, determining displacement-axial thrust curves of the bearing stator thrust magnetic steel and the bearing rotor thrust magnetic steel, and utilizing a second displacement sensor to acquire data information of the moving position of the bearing stator, and directly adjusting the bearing stator to a required position to offset the axial force of a shaft system where the bearing rotor 10 is positioned.
The control method of the permanent magnet thrust suspension bearing according to the third embodiment of the present invention, as shown in fig. 8 and 9, includes the following steps: step 1, acquiring axial force data of a shaft system where a bearing rotor 10 is located; step 2, comparing whether the axial force data is in a set axial force threshold range, and generating an execution control signal according to a comparison result; step 3, the driving device adjusts the axial position of the bearing stator 20 according to the execution control signal; step 4, further comprising the following steps: and after the bearing design is finished, determining displacement-axial thrust curves of the bearing stator thrust magnetic steel and the bearing rotor thrust magnetic steel, and utilizing a second displacement sensor to acquire data information of the moving position of the bearing stator, and directly adjusting the bearing stator to a required position to offset the axial force of a shaft system where the bearing rotor 10 is positioned. The permanent magnetic thrust suspension bearing is any one of the permanent magnetic thrust suspension bearings.
The above disclosed features are not limited to the disclosed combinations with other features, and other combinations between features can be made by those skilled in the art according to the purpose of the invention to achieve the purpose of the invention.
Claims (7)
1. A permanent magnet thrust suspension bearing, comprising: a bearing stator (20), a bearing rotor (10), a driving device (30), a sensor and a control device; a stator thrust magnetic steel (102) is arranged in a stator shell (101) of the bearing stator (20); rotor thrust magnetic steel (103) is arranged outside a rotor cylinder (104) of the bearing rotor (10); the driving device (30) is connected with the bearing stator (20); the sensor is used for detecting axial displacement or axial force of the bearing rotor (10); the control device is connected with the sensor and the driving device (30); the sensor detects axial movement or axial stress of the bearing rotor (10), and the control device controls the running state of the driving device (30) according to the monitoring result of the sensor, so that the driving device (30) drives the bearing stator (20) to move in the axial direction, and axial thrust for balancing the axial load of the bearing rotor is generated between the bearing stator thrust magnetic steel and the bearing rotor thrust magnetic steel.
2. The permanent magnet thrust suspension bearing according to claim 1, characterized in that the drive means (30) is a hydraulic drive means, a pneumatic drive means or an electric drive means.
3. The permanent magnet thrust suspension bearing according to claim 1, characterized in that the two sides of the bearing stator (20) are respectively fixedly connected with lugs (201); the driving device (30) is a hydraulic driving device, a hydraulic rod (202) of the driving device (30) is connected with the connecting support lug (201), the hydraulic rod (202) is installed in a hydraulic cylinder (203), and the hydraulic cylinder (203) is fixedly connected with the installation seat (204).
4. A permanent magnet thrust suspension bearing according to any one of claims 1-3 wherein the bearing stator thrust magnetic steel and the bearing rotor thrust magnetic steel are annular neodymium iron boron magnetic steel, and the direction of magnetization of the magnetic steel is radial radiation magnetization.
5. The permanent magnet thrust suspension bearing of claim 4 wherein adjacent bearing stator thrust magnet steel poles are oppositely aligned; the arrangement directions of the thrust magnetic steel magnetic poles of adjacent bearing rotors are opposite; the arrangement direction of the thrust magnetic steel of the bearing rotor and the magnetic pole of the thrust magnetic steel of the bearing stator at the corresponding positions is opposite.
6. The control method of the permanent magnet thrust suspension bearing is characterized by comprising the following steps of: step 1, acquiring axial displacement data of a shaft system where a bearing rotor (10) is positioned; step 2, comparing whether the axial displacement data is in a set displacement threshold range, and generating an execution control signal according to a comparison result; step 3, the driving device adjusts the axial position of the bearing stator (20) according to the execution control signal; step 4, repeating the steps 1-3 until the obtained axial displacement data value is smaller than the set displacement threshold value; the permanent magnet thrust suspension bearing is the permanent magnet thrust suspension bearing according to any one of claims 1 to 5.
7. The control method of the permanent magnet thrust suspension bearing is characterized by comprising the following steps of: step 1, acquiring axial force data of a shaft system where a bearing rotor (10) is located; step 2, comparing whether the axial force data is in a set axial force threshold range, and generating an execution control signal according to a comparison result; step 3, the driving device adjusts the axial position of the bearing stator (20) according to the execution control signal; step 4, repeating the steps 1-3 until the obtained axial force data value is smaller than the set axial force threshold value; the permanent magnet thrust suspension bearing is the permanent magnet thrust suspension bearing according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548020.4A CN114673728B (en) | 2020-12-24 | 2020-12-24 | Permanent magnet thrust suspension bearing and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011548020.4A CN114673728B (en) | 2020-12-24 | 2020-12-24 | Permanent magnet thrust suspension bearing and control method thereof |
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| CN114673728A CN114673728A (en) | 2022-06-28 |
| CN114673728B true CN114673728B (en) | 2024-01-26 |
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| CN202011548020.4A Active CN114673728B (en) | 2020-12-24 | 2020-12-24 | Permanent magnet thrust suspension bearing and control method thereof |
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