CN114673728A - 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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- CN114673728A CN114673728A CN202011548020.4A CN202011548020A CN114673728A CN 114673728 A CN114673728 A CN 114673728A CN 202011548020 A CN202011548020 A CN 202011548020A CN 114673728 A CN114673728 A CN 114673728A
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- 239000000725 suspension Substances 0.000 title claims abstract description 62
- 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 37
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 230000005415 magnetization Effects 0.000 claims description 4
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 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
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
Abstract
The invention discloses a permanent magnetic thrust suspension bearing and a control method thereof, wherein the permanent magnetic 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 the axial displacement or the axial force of the bearing rotor; the control device is connected with the sensor and the driving device; the sensor detects the 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 magnetic thrust suspension bearing is applied, a mechanical bearing with large bearing capacity does not need to be arranged in the axial direction, and the problems of high cost and high friction noise existing in the arrangement of 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 of the water ship and the underwater naval vessel is provided by the rotation and drainage of the propeller, and a shaft system connecting the propeller and the power device is positioned at the tail of the equipment. The bearing system is required to be installed by a bearing system consisting 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, when the propeller is drained, axial force is generated on the shaft system, and the bearing system needs to provide the axial force to balance the axial force generated by the propeller. Because the tonnage of ships and naval vessels is large, the weight of a shaft system for connecting the propeller can reach dozens of tons, a traditional mechanical bearing with a 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 weight are large. For underwater equipment such as a naval vessel and the like, the stealth performance of the naval vessel can be influenced by friction running noise generated by using a traditional mechanical bearing.
Magnetic bearings exist in the prior art, and a Magnetic Bearing (Magnetic Bearing) suspends a Bearing rotor in the air by utilizing the Magnetic force action, so that no mechanical contact exists between the Bearing rotor and a Bearing stator. A magnetic suspension bearing is an active electromagnetic suspension bearing, which utilizes the current in an electromagnet coil to generate contactless controllable electromagnetic force to enable a bearing rotor to operate in a space stable suspension state. The conventional 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 position sensor is used for detecting a deviation signal of the bearing rotor shaft, the controller calculates and outputs a control signal after receiving the signal, the power amplifier is used for controlling the current of the coil, and the size of the electromagnetic force is adjusted, 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 a fan and a fan which need high rotating speed at present. However, for large-scale equipment such as ships and naval vessels, since the driving device is an electromagnet, the driving device can be driven to work only by a large current, a large amount of energy is consumed for the operation of the bearing, the fuel carried by the ships and naval vessels is effective, the endurance capacity of the equipment is greatly influenced by the application of the active magnetic suspension bearing, and the application of the active magnetic suspension bearing is difficult to be carried out in practice. Meanwhile, the active magnetic suspension bearing which continuously consumes energy in operation does not accord with the industrial development direction of green production and green manufacture, and the energy waste is serious.
Disclosure of Invention
The invention aims to provide a permanent magnetic thrust suspension bearing and a control method thereof, and aims to solve the problem that an electromagnetic bearing is difficult to apply to scenes such as a ship tail shaft and the like.
The technical scheme for solving the first technical problem of the invention is as follows: a permanent magnetic thrust suspension bearing and a control method thereof comprise the following steps: 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 the axial displacement or the axial force of the bearing rotor; the control device is connected with the sensor and the driving device; the sensor detects the 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 axially, 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 is characterized in that the driving device is a hydraulic driving device, a pneumatic driving device or an electric driving device.
According to the permanent magnet thrust suspension bearing, two sides of a bearing stator are respectively and fixedly connected with the support lugs; the hydraulic rod of the driving device is connected with the connecting support lug, the driving device is a hydraulic driving device, the hydraulic rod is installed in the hydraulic cylinder, and the hydraulic cylinder is fixedly connected with the mounting seat.
According to the permanent magnet thrust suspension bearing, the bearing stator thrust magnetic steel and the bearing rotor thrust magnetic steel are both annular neodymium iron boron magnetic steel, and the magnetizing direction of the magnetic steel is radial radiation magnetizing.
According to the permanent magnet thrust suspension bearing, the arrangement directions of the magnetic poles of the thrust magnetic steels of the adjacent bearing stators are opposite; the arrangement directions of the adjacent magnetic poles of the thrust magnetic steel of the bearing rotor are opposite; the arrangement direction of the magnetic poles of the thrust magnetic steel of the bearing rotor and the thrust magnetic steel of the bearing stator at the corresponding position is opposite.
The invention provides a control method of a permanent magnet thrust suspension bearing, which comprises the following steps: step 1, obtaining axial displacement data of a shaft system in which a bearing rotor is located; step 2, comparing whether the axial displacement data is within 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 magnet thrust suspension bearing is the permanent magnet thrust suspension bearing.
The invention provides a control method of a permanent magnet thrust suspension bearing, which comprises the following steps of 1, acquiring axial force data of a shafting where a bearing rotor is located; step 2, comparing whether the axial force data is in a set axial force threshold range or not, 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 magnet thrust suspension bearing is the permanent magnet thrust suspension bearing.
The permanent magnetic thrust suspension bearing is applied to large-scale equipment such as ships and naval vessels, does not need to be provided with a mechanical bearing with large bearing capacity in the axial direction, and can solve the problems of high cost and high friction noise existing in the arrangement of the mechanical bearing in the axial direction.
Drawings
The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description set forth below when taken in conjunction with the following drawings, which are given by way of illustration only and not by way of limitation, wherein:
FIG. 1 is a perspective view of a permanent magnetic thrust suspension bearing according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a permanent magnet thrust suspension bearing according to an embodiment of the present invention;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 2;
FIG. 5 is a schematic view of a drive device, a bearing stator and a second force sensor of an embodiment;
FIG. 6 is a schematic view of a bearing rotor and bearing stator in a non-axially displaced state;
FIG. 7 is a schematic view of a bearing rotor and a bearing stator in an axial displacement 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 control method for 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 components represented by the respective reference numerals are listed below:
10. bearing rotor, 20, bearing stator, 30, driving device, 101, stator housing, 102, stator thrust magnetic steel, 103, rotor thrust magnetic steel, 104, rotor barrel, 105, shaft, 106, auxiliary bearing, 107, second displacement sensor, 108, second force sensor, 201, connecting lug, 202, hydraulic rod, 203, hydraulic cylinder, 204 and mounting seat.
Detailed Description
Hereinafter, embodiments of a permanent magnet thrust levitation 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, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other embodiments that are obvious based on the disclosure of the claims and the specification herein, including those that employ any obvious substitutions and modifications to the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.
Fig. 1-6 show a permanent magnet thrust suspension bearing according to an embodiment of the present invention, comprising:
bearing stator 20, bearing rotor 10, drive device 30, sensor and control device;
stator thrust magnetic steel 102 is arranged in a stator shell 101 of the bearing stator 20;
a rotor thrust magnetic steel 103 is arranged outside a rotor barrel 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 the 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, 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 axially, and 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 further included, for example a sliding bearing, in which the shaft is axially movable;
referring to fig. 6, the axial positions of the bearing stator and the bearing rotor are initial positions, the magnetic force between the radial magnetic steel of the bearing stator and the thrust magnetic steel of the bearing stator is balanced in the axial direction, and the acting force on the shaft is zero. As shown in fig. 7, when the bearing rotor is pushed by the axial force, the bearing rotor is displaced axially, the bearing stator thrust magnetic steel generates a magnetic acting force on the bearing rotor thrust magnetic steel, the magnetic acting force is opposite to the direction of the axial displacement of the bearing rotor in the axial direction, and the larger the axial displacement, the larger the axial magnetic acting force is. Therefore, after the bearing rotor is axially displaced, when the displacement sensor detects the axial movement of the bearing rotor, the control device controls the state of the hydraulic integrated device, so that an oil cylinder rod arranged in the oil 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 permanent magnetic thrust suspension bearing is applied to large-scale equipment such as ships and naval vessels, does not need to be provided with a mechanical bearing with large bearing capacity in the axial direction, and can solve the problems of high cost and high friction noise existing in the arrangement of the mechanical bearing in the axial direction. In one embodiment, a marine vessel or vessel installation is provided, the permanent magnet thrust levitation bearing of the above-described embodiment being mounted at a transmission location between the power take-off of the installation 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 fighting capacity of the submarines.
In a specific embodiment of the permanent magnetic thrust suspension bearing, the driving device 30 is a hydraulic driving device 30, a pneumatic driving device 30 or an electric driving device. For example, in a specific embodiment of the permanent magnetic thrust suspension bearing, the two sides of the bearing stator 20 are respectively and fixedly connected with the support 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 mounting base 204. In one arrangement, an additional support frame and a guide rail are provided, the bearing stator being mounted on the guide rail, the guide rail being slidable in a guide slot in the support frame, the drive means driving the bearing stator alone. 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, avoided the setting of extra spare part, not only reduced equipment cost, 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 arranged on a shafting of the shaft 105 of the permanent magnetic inferential suspension bearing and used 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 the mounting, the 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 embodiment of the permanent magnetic thrust suspension bearing, two sides of the bearing stator 20 are respectively and fixedly connected with the support lugs 201; one end of a hydraulic rod 202 of the driving device 30 is fixedly connected with the first connecting lug 201, and the other end of the hydraulic rod can move in a guide hole of the second connecting 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 arranged on a shafting of the shaft 105 of the permanent magnet inferential suspension bearing and used 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, the second force sensor being connected to the control means.
Through the addition of the second displacement sensor, the distance that the driving device pushes the bearing stator to move can be provided, as shown in fig. 10, in the adjustable range of the bearing stator, the moving distance of the bearing stator and the axial thrust generated by the stator thrust magnetic steel and the rotor thrust magnetic steel form a correlation relationship, so that the moving distance information or data of the bearing stator provided by the second displacement sensor can be utilized, more accurate position adjustment of the bearing stator is provided, and further more accurate axial thrust is provided to balance the axial force generated by a propeller to a shafting.
In a specific embodiment of the permanent magnetic thrust suspension bearing, the thrust magnetic steel of the bearing stator 20 and the thrust magnetic steel of the bearing rotor 10 are both annular neodymium iron boron magnetic steels, and the magnetization direction of the magnetic steels is radial radiation magnetization. For example, in a specific embodiment of the permanent magnet thrust suspension bearing, the magnetic poles of the thrust magnetic steels of adjacent bearing stators 20 are arranged in opposite directions; the arrangement directions of the magnetic poles of the thrust magnetic steel of the adjacent bearing rotors 10 are opposite; the thrust magnetic steel of the bearing rotor at the corresponding position is opposite to the arrangement direction of the magnetic poles of the thrust magnetic steel of the bearing stator. In a preferred embodiment, the width of the thrust magnetic steel of the bearing rotor is equal to that of the thrust magnetic steel of the bearing stator, and the distance range for adjusting the axial thrust by moving the bearing stator is less than or equal to one half of the width of the magnetic steel.
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, obtaining axial displacement data of a shafting where a bearing rotor 10 is located; step 2, comparing whether the axial displacement data is within 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 magnet thrust suspension bearing is any one of the permanent magnet thrust suspension bearings.
The method for controlling a permanent magnet thrust suspension bearing according to a second embodiment of the present invention, shown in fig. 8 and 9, includes the following steps: step 1, obtaining axial force data of a shafting where a bearing rotor 10 is located; step 2, comparing whether the axial force data is in a set axial force threshold range or not, 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 magnet thrust suspension bearing is any one of the permanent magnet thrust suspension bearings. In a further preferred embodiment of the control method, the method further comprises the following steps: and determining displacement-axial thrust curves of the thrust magnetic steel of the bearing stator and the thrust magnetic steel of the bearing rotor after the bearing is designed, acquiring the moving position data information of the bearing stator by using a second displacement sensor, and directly adjusting the bearing stator to a required position to counteract the axial force of a shafting where the bearing rotor 10 is located.
A method for controlling a permanent magnetic thrust suspension bearing according to a third embodiment of the present invention, as shown in fig. 8 and 9, includes the following steps: step 1, obtaining axial force data of a shafting where a bearing rotor 10 is located; step 2, comparing whether the axial force data is in a set axial force threshold range or not, 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, also comprising the following steps: and determining displacement-axial thrust curves of the thrust magnetic steel of the bearing stator and the thrust magnetic steel of the bearing rotor after the bearing is designed, acquiring the moving position data information of the bearing stator by using a second displacement sensor, and directly adjusting the bearing stator to a required position to counteract the axial force of a shafting where the bearing rotor 10 is located. The permanent magnet thrust suspension bearing is any one of the permanent magnet thrust suspension bearings.
The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention, so as to achieve the purpose of the invention.
Claims (7)
1. A permanent magnet thrust suspension bearing, comprising: the bearing device comprises 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); a rotor thrust magnetic steel (103) is arranged outside a rotor barrel (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 the 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), 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 thrust magnetic steel of the bearing stator and the thrust magnetic steel of the bearing rotor.
2. The permanent magnetic thrust suspension bearing according to claim 1, characterized in that said driving means (30) are hydraulic, pneumatic or electric.
3. The permanent magnet thrust suspension bearing according to claim 1, wherein two sides of the bearing stator (20) are fixedly connected with lugs (201) respectively; 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 base (204).
4. The permanent magnet thrust suspension bearing according to any one of claims 1 to 3, wherein said bearing stator thrust magnetic steel and said bearing rotor thrust magnetic steel are both annular neodymium iron boron magnetic steel, and the magnetization direction of the magnetic steel is radial radiation magnetization.
5. The permanent magnet thrust suspension bearing of claim 4, wherein adjacent bearing stator thrust magnetic steel poles are arranged in opposite directions; the arrangement directions of the adjacent magnetic poles of the thrust magnetic steel of the bearing rotor are opposite; the arrangement direction of the magnetic poles of the thrust magnetic steel of the bearing rotor and the thrust magnetic steel of the bearing stator at the corresponding position is opposite.
6. A control method of a permanent magnet thrust suspension bearing is characterized by comprising the following steps: step 1, obtaining axial displacement data of a shafting where a bearing rotor (10) is located; step 2, comparing whether the axial displacement data is within 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 a 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. A control method of a permanent magnet thrust suspension bearing is characterized by comprising the following steps: step 1, obtaining axial force data of a shaft system in which a bearing rotor (10) is located; step 2, comparing whether the axial force data is in a set axial force threshold range or not, 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 a 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.
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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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| CN202011548020.4A CN114673728B (en) | 2020-12-24 | 2020-12-24 | Permanent magnet thrust suspension bearing and control method thereof |
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| CN114673728A true CN114673728A (en) | 2022-06-28 |
| CN114673728B CN114673728B (en) | 2024-01-26 |
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