Quantitative oil supply system for repulsive magnetic liquid dual suspension bearing

Abstract

The application provides a repulsive magnetic liquid double-suspension bearing quantitative oil supply system, and relates to the field of magnetic liquid double-suspension bearings. The system comprises a supporting unit, a rotating shaft, a first radial bearing unit, an axial balance unit, a second radial bearing unit and a power unit. The first radial bearing unit, the axial balance unit and the second radial bearing unit are sequentially arranged on the rotating shaft. When the system is started, the radial balance and the axial balance of the rotating shaft are realized by regulating the plug-in throttle valve, so that a large number of external pipelines are not needed, the components for connecting the magnetic liquid double-suspension bearing and the pipelines are saved, the cost is saved, the leakage is reduced and the structure is compact. Meanwhile, the hydraulic pipeline is integrated in the magnetic liquid double-suspension bearing system, the volume of the magnetic liquid double-suspension bearing is reduced, the installation is convenient, the size of the oil in the pipeline can be easily controlled and regulated, the efficiency loss in the pipeline connection process is reduced, and the working efficiency of the magnetic liquid double-suspension bearing system is improved.

Description

Technical Field

[0001] This invention relates to the field of magnetic fluid double suspension bearings, and more specifically to a repulsive type magnetic fluid double suspension bearing quantitative oil supply system. Background Technology

[0002] The magnetic-hydraulic dual-levitation bearing is a new type of suspension bearing that primarily uses electromagnetic levitation and secondarily uses hydrostatic support. It can add hydrostatic support force without affecting the electromagnetic levitation force, effectively improving bearing operational stability and service life. When starting the magnetic-hydraulic dual-levitation bearing system, eight hydraulic lines evenly distributed radially and circumferentially around the stator provide hydrostatic support to the shaft, while two lines located on the front and rear axial stators provide hydraulic control for the bearing's axial thrust.

[0003] The existing magnetic fluid dual suspension bearing system has an enlarged overall structure and occupies a large area due to the eight hydraulic lines evenly distributed in the radial direction of the external stator and the two lines located in the front and rear axial directions of the stator. At the same time, the magnetic fluid dual suspension system requires complex debugging of the eight hydraulic lines evenly distributed in the radial direction of the stator during startup, and due to the installation process, oil leakage is inevitable, which will increase losses and reduce efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a repulsive type magnetic fluid dual suspension bearing quantitative oil supply system, which integrates the magnetic fluid dual suspension bearing system with hydraulic pipelines. An oil inlet is opened at the bottom of the radial stator of the magnetic fluid dual suspension bearing system. Oil grooves and oil holes are opened inside the magnetic fluid dual suspension bearing system, and cartridge throttle valves are installed to control each pipeline individually. Using cartridge throttle valves to control each pipeline means that when the magnetic fluid dual suspension bearing system starts, only the cartridge throttle valves need to be adjusted to achieve radial and axial balance of the shaft, eliminating the need for numerous external pipelines. This eliminates the need for the magnetic fluid dual suspension bearing and the components connecting multiple pipelines, saving costs and resulting in a compact structure. Simultaneously, integrating the hydraulic pipelines into the magnetic fluid dual suspension bearing system reduces the size of the magnetic fluid dual suspension bearing, facilitates installation, and makes it easy to control and adjust the oil volume in the pipelines, reducing efficiency losses during pipeline connection and improving the working efficiency of the magnetic fluid dual suspension bearing system.

[0005] Specifically, the present invention provides a repulsive type magnetic fluid dual suspension bearing quantitative oil supply system, which includes a support unit, a rotating shaft, a first radial bearing unit, an axial balancing unit, a second radial bearing unit, and a power unit. The first radial bearing unit, the axial balancing unit, and the second radial bearing unit are sequentially sleeved on the rotating shaft, and the axes of the rotating shaft, the first radial bearing unit, the axial balancing unit, and the second radial bearing unit are located on the same straight line. A fixing bracket for fixing the first radial bearing unit and the second radial bearing unit is provided below the rotating shaft. The first end of the first radial bearing unit and the first end of the second radial bearing unit are respectively connected to one end of the fixing bracket, and the second end of the first radial bearing unit and the second end of the second radial bearing unit are respectively connected to the axial balancing unit.

[0006] Both the first radial bearing unit and the second radial bearing unit include a first cover, a first end cover, a locking kit, a magnetic sleeve, a radial stator, a cartridge throttle valve assembly, a coil assembly, a pipe joint, and multiple sealing rings. The magnetic sleeve is installed on one side of the rotating shaft, and one end of the magnetic sleeve contacts the second shoulder of the rotating shaft. The coil assembly is located outside the magnetic sleeve and is fixedly connected to the stator column of the radial stator. The radial stator is sleeved on the outside of the coil assembly, and the first end of the radial stator is connected to one end of the first end cover. The first cover is connected to the other end of the first end cover. Multiple stator columns for connecting the coil assembly are provided inside the radial stator. The cartridge throttle valve assembly is evenly installed along the circumference of the radial stator.

[0007] The first radial bearing unit is also provided with a magnetic shield, and the second end of the radial stator of the first radial bearing unit is connected to the first end of the magnetic shield; the second end of the magnetic shield is connected to the axial balance unit.

[0008] The second radial bearing unit is further provided with a second cover and a second end cover. The second end of the radial stator of the second radial bearing unit is connected to one end of the second end cover, and the other end of the second end cover is connected to the second cover.

[0009] The axial balancing unit includes an axial rear stator, a housing, a pipe joint, an axial front stator, a third cover, a first axial enameled wire, a first axial permanent magnet, cartridge throttle valves, a thrust plate, a second axial permanent magnet, a second axial enameled wire, and multiple sealing rings. The first end of the axial rear stator is connected to the second end of the magnetic isolation body, the second end of the axial rear stator is connected to the first end of the housing, the second end of the housing is connected to the first end of the axial front stator, the second end of the axial front stator is connected to one end of the third cover, the first ends of the first axial enameled wire and the first axial permanent magnet are respectively connected to the second end of the axial rear stator, the second end of the first axial permanent magnet is connected to the first end of the thrust plate, the second end of the thrust plate is connected to the first end of the second axial permanent magnet, the second end of the second axial permanent magnet is connected to the first end of the axial front stator, and the second end of the second axial enameled wire is connected to the second end of the axial front stator. Two sets of cartridge throttle valves are respectively installed at the bottom ends of the axial rear stator and the axial front stator.

[0010] Preferably, the radial stators of the first radial bearing unit and the second radial bearing unit are provided with an oil inlet hole, an oil groove and a sealing groove at the bottom, an oil hole communicating with the magnetic shield, an upper wiring hole and an oil outlet hole, and a threaded hole in sequence. At the same time, the wiring hole and the oil outlet hole share a channel. After the wiring is led out, the channel is sealed and the oil at the upper end flows out from the side channel.

[0011] Preferably, the length of the magnetic sleeve of the first radial unit and the second radial unit is less than the length of the radial stator. In the coil group, the end near the outer ring of the bearing stator is the S pole, and the end near the inner ring of the bearing stator is the N pole. In the magnetic sleeve of the first radial unit, the inner ring of the magnetic sleeve is the S pole, and the outer ring of the magnetic sleeve is the N pole.

[0012] Preferably, the rear axial stator and the axial permanent magnet, as well as the front axial stator and the axial permanent magnet, are connected by a Tesla valve structure, so that the gap between the axial stator and the axial permanent magnet is a one-way channel.

[0013] Preferably, the radial stators of the first radial bearing unit and the second radial bearing unit are provided with a cartridge valve mounting hole, an oil inlet, an oil groove, an oil outlet, a sealing groove, and a threaded hole. The magnetic shield of the first radial bearing unit is provided with a magnetic shield oil inlet, a magnetic shield oil outlet, a threaded hole, and a sealing groove in sequence. The axial rear stator is provided with an axial rear stator oil outlet, a cartridge valve mounting hole, a threaded hole, and an oil inlet in sequence. The housing is provided with a housing oil inlet, a housing oil outlet, a threaded hole, and a sealing groove in sequence. The axial front stator is provided with an axial front stator oil inlet, a cartridge valve mounting hole, and a threaded hole in sequence.

[0014] Preferably, the first ends of the first radial bearing unit and the second radial bearing unit are respectively connected to one end of the fixed bracket by hexagon socket head cap screws, and one end of the axial balancing unit is connected to the second end of the first radial bearing unit by hexagon socket head cap screws.

[0015] Preferably, the oil inlet holes of the radial stators of the first radial bearing unit and the second radial bearing unit are both located at the bottom of the radial stator and there is only one of each. The wiring holes of the radial stators of the first radial bearing unit and the second radial bearing unit are located at the upper end of the radial stator. The oil outlet hole of the radial stator of the first radial unit is located at the other end of the radial stator and communicates with the wiring hole. The oil outlet hole of the radial stator of the second radial unit is located at the upper end of the radial stator and does not communicate with the oil outlet hole. The pipe joints of the first radial unit and the second radial unit are respectively connected to the radial stator through the radial stator oil inlet holes.

[0016] The radial stator oil grooves of the first radial bearing unit and the second radial bearing unit are located at one end of the radial stator and have eight circumferentially evenly distributed oil holes that lead into the internal stator column of the radial stator.

[0017] The radial stator oil inlet and the magnetic shielding oil inlet of the first radial bearing unit are connected to the radial stator oil groove, and the radial stator oil inlet and the radial stator oil groove of the second radial bearing unit are connected.

[0018] The oil inlet of the magnetic shielding body of the first radial bearing unit is located at the bottom end of the magnetic shielding body and communicates with the oil inlet of the radial stator. Both ends of the magnetic shielding body are provided with sealing grooves. The oil outlet of the magnetic shielding body is located at the top end of the magnetic shielding body and communicates with the oil outlet of the radial stator.

[0019] The axial rear stator oil outlet is located at the upper end of the axial rear stator and communicates with the oil outlet of the magnetic shield; the axial rear stator oil inlet is located at the bottom end of the axial rear stator and communicates with the oil outlets of the magnetic shield and the housing; and the axial rear stator cartridge valve mounting hole is located at the bottom end of the axial rear stator.

[0020] The oil inlet of the housing is located at the bottom of the housing and communicates with the oil inlet of the axial rear stator. The oil outlet of the housing is located at the top of the housing. The pipe joint is connected to the housing through the oil outlet of the housing. Both ends of the housing are provided with sealing grooves.

[0021] The axial front stator oil inlet is located at the bottom of the axial front stator and communicates with the housing oil inlet. The axial front stator cartridge valve mounting hole is located at the bottom of the axial front stator.

[0022] Preferably, the radial stator of the first radial bearing unit and the second radial bearing unit is provided with eight circumferentially evenly distributed cartridge throttle valve sockets, which are used to install cartridge throttle valves to regulate hydraulic oil in eight directions.

[0023] Preferably, the oil grooves of the radial stators of the first radial bearing unit and the second radial bearing unit are provided with eight circumferentially evenly distributed oil holes that lead into the stator column of the radial stator.

[0024] Preferably, the plurality of sealing rings are designated as a first sealing ring, a second sealing ring, a third sealing ring, a fourth sealing ring, a fifth sealing ring, a sixth sealing ring, a seventh sealing ring, a seventh sealing ring, an eighth sealing ring, a ninth sealing ring, a tenth sealing ring, an eleventh sealing ring, a twelfth sealing ring, a thirteenth sealing ring, a fourteenth sealing ring, a fifteenth sealing ring, a sixteenth sealing ring, and a seventeenth sealing ring. The first sealing ring is located at the connection between the rotating shaft and the first end cover of the first radial bearing unit to prevent oil leakage from the first radial balancing unit. The second sealing ring is located at the connection between the rotating shaft and the axially forward stator to prevent oil leakage from the axial balancing unit. To prevent oil leakage from the second radial balance unit, a third sealing ring is installed at the connection between the shaft and the first end cover of the second radial bearing unit. A fourth sealing ring is installed at the connection between the shaft and the second end cover of the second radial bearing unit to prevent oil leakage from the radial balance unit. Fifth and sixth sealing rings are installed at the connection between the first end cover of the first radial bearing unit and the radial stator to prevent oil leakage from the oil groove and from the radial balance unit. A seventh sealing ring is installed at the connection between the radial stator of the first radial bearing unit and the magnetic shield to prevent oil leakage from the radial balance unit. To prevent oil leakage, the eighth sealing ring is installed at the connection between the magnetic shielding body and the axial rear stator of the first radial bearing unit to prevent oil leakage from the oil outlet. The ninth sealing ring is installed at the connection between the radial stator and the oil inlet of the magnetic shielding body of the first radial bearing unit to prevent oil leakage from the pipeline. The tenth sealing ring is installed at the connection between the magnetic shielding body and the oil inlet of the axial rear stator of the first radial bearing unit to prevent oil leakage from the oil inlet. The eleventh sealing ring is installed at the connection between the front and rear stators and the housing to prevent oil leakage from the axial balancing unit. The twelfth sealing ring is installed at the connection between the axial rear stator and the housing to prevent oil leakage from the shaft. To prevent oil leakage into the balancing unit, the thirteenth sealing ring is installed at the connection between the axial rear stator and the housing oil inlet to prevent oil leakage from the pipeline; the fourteenth sealing ring is installed at the connection between the axial front stator and the housing oil inlet to prevent oil leakage from the pipeline; the fifteenth sealing ring is installed at the connection between the first end cover of the second radial bearing unit and the radial stator to prevent oil leakage from the radial balancing unit; and the sixteenth and seventeenth sealing rings are installed at the connection between the second end cover of the second radial bearing unit and the radial stator to prevent oil leakage from the oil tank and the radial balancing unit.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] (1) Compared with the original magnetic fluid dual suspension bearing system, this invention adopts a cartridge throttle valve, which eliminates the need for multiple pipeline connections in the magnetic fluid dual suspension bearing, thereby reducing leakage and saving costs. On the other hand, a Tesla valve structure is introduced between the axial stator and the axial permanent magnet, which allows the oil in the axial bearing to flow in only one direction, increasing the stability of the system. At the same time, the hydraulic pipeline is integrated into the magnetic fluid dual suspension bearing system, reducing the volume of the magnetic fluid dual suspension bearing. It is also easy to install, has a small size, a compact structure, and simple pipelines.

[0027] (2) In this invention, the electromagnetic attraction type magnetic fluid double suspension bearing is changed to the electromagnetic repulsion type magnetic fluid double suspension bearing, so that when the bearing rotor is subjected to force and displacement, it is subjected to the dual repulsive force of static pressure and electromagnetic force, which greatly improves the stability and life of the magnetic fluid double suspension bearing, and also increases the bearing's load-bearing capacity and stiffness performance.

[0028] (3) Each unit of this invention has only one oil inlet and one oil outlet, avoiding potential leakage caused by multiple pipeline connections; reducing connections and coordination, and improving energy conversion efficiency and reliability. It also realizes the integration of the magnetic fluid double suspension bearing system with the hydraulic pipeline, and the use of cartridge throttle valves has the characteristics of convenient installation, easy control and maintenance.

[0029] (4) The present invention effectively eliminates a series of nonlinear characteristics such as nonlinear vibration and bifurcation of electromagnetic suction type bearings, which simplifies the processing method, improves work efficiency and greatly increases the life of magnetic fluid double suspension bearings. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a cross-sectional axonometric view of the overall structure of the present invention;

[0032] Figure 3 This is a cross-sectional view of the first radial bearing unit of the present invention;

[0033] Figure 4 This is a cross-sectional view of the axial balance unit of the present invention;

[0034] Figure 5a This is a schematic diagram of the Tesla valve structure of the present invention;

[0035] Figure 5b For the present invention Figure 5a An enlarged view of point B;

[0036] Figure 5c For the present invention Figure 5a An enlarged view of point C;

[0037] Figure 6 This is a cross-sectional view of the second radial bearing unit of the present invention;

[0038] Figure 7 This is a radial stator sectional view of the first radial bearing unit of the present invention;

[0039] Figure 8 This is a radial stator sectional view of the second radial bearing unit of the present invention;

[0040] Figure 9 This is an overall sectional view of the present invention.

[0041] The main reference numerals are as follows:

[0042] Fixed bracket 101, fixed bracket 102, rotating shaft 201, first sealing ring 202, second sealing ring 203, third sealing ring 204, fourth sealing ring 205, first radial bearing unit 3, first cover 301, first end cover 302, locking kit 303, magnetic sleeve 304, radial stator 305, insert throttle valve assembly 306, coil 307, magnetic shield 308, pipe joint 309, fifth sealing ring 310, sixth sealing ring 311, seventh sealing ring 312, ninth sealing ring 313, eighth sealing ring 314, tenth sealing ring 315, axial balance unit 4, axial rear stator 401, housing 402, pipe joint 403, axial front stator 404, third cover 405, first axial Enameled wire 406, axial permanent magnet 407, cartridge throttle valve 408, cartridge throttle valve 410, thrust plate 409, axial permanent magnet 411, second axial enameled wire 412, eleventh sealing ring 413, twelfth sealing ring 414, thirteenth sealing ring 415, fourteenth sealing ring 416, second radial bearing unit 5, first cover 501, first end cover 502, radial stator 503, cartridge throttle valve assembly 504, magnetic sleeve 505, locking assembly 506, second cover 507, pipe joint 508, pipe joint 509, coil 510, second end cover 511, fifteenth sealing ring 512, sixteenth sealing ring 513, seventeenth sealing ring 514, power unit 6, Tesla valve structure 1001. Detailed Implementation

[0043] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0044] Specifically, the present invention provides a repulsive type magnetic fluid dual suspension bearing quantitative oil supply system, such as... Figure 1 As shown, it includes a support unit, a rotating shaft 201, a first radial bearing unit 3, an axial balancing unit 4, a second radial bearing unit 5, and a power unit 6. The axes of the rotating shaft 201, the first radial bearing unit 3, the axial balancing unit 4, the second radial bearing unit 5, and the power unit 6 are on the same straight line.

[0045] The cartridge valve and the internal piping of the magnetic fluid dual-suspension bearing system used in this application replace the traditional hydraulic piping structure, avoiding a large number of external pipes and eliminating the need for the magnetic fluid dual-suspension bearing and components connecting multiple pipes. Furthermore, by integrating the hydraulic piping into the magnetic fluid dual-suspension bearing system, the volume of the magnetic fluid dual-suspension bearing is reduced. The first radial bearing unit 3 and the second radial bearing unit 5 provide radial support and anti-drop protection.

[0046] When coil 307 or coil 510 is energized, a magnetic field is generated, which causes the radial stator 305 and the magnetic sleeve 304 or the radial stator 503 and the magnetic sleeve 505 to generate electromagnetic force, respectively. The electromagnetic force causes the rotating shaft and the workpiece fixed on it to levitate, and the connected power unit causes the rotating shaft and the workpiece fixed on it to rotate.

[0047] The eight oil ports are located on the eight magnetic poles, which are the stator columns of the radial stator 305 and the radial stator 503, realizing the inlet and outlet of the hydraulic system. The oil flows through the magnetic sleeve to form an oil film, supporting the rotating shaft.

[0048] When the coil assembly 307 and coil 510 on the first radial bearing unit 3 and the second radial bearing unit 5 are energized, a magnetic field is generated, causing the stator column and the magnetic sleeve to generate electromagnetic force. Oil flows in from the stator column, passes through the magnetic sleeve 304 and the magnetic sleeve 505, thereby generating a hydrostatic support force, making the device work more stably. Both the first radial bearing unit 3 and the second radial bearing unit 5 include a first cover, a first end cover, a locking assembly, a magnetic sleeve, a radial stator, a cartridge throttle valve assembly, a coil assembly, a pipe joint, and multiple sealing rings. The magnetic sleeve is installed on one side of the rotating shaft, and one end of the magnetic sleeve contacts the second shoulder of the rotating shaft. The coil assembly is located outside the magnetic sleeve and is fixedly connected to the stator column of the radial stator. The radial stator is sleeved outside the coil assembly, and the first end of the radial stator is connected to one end of the first end cover. The first cover is connected to the other end of the first end cover. Multiple stator columns for connecting the coil assembly are arranged inside the radial stator. The cartridge throttle valve assembly is evenly installed along the circumference of the radial stator. The first radial bearing unit also contains a magnetic shield, and the second end of the radial stator of the first radial bearing unit is connected to the first end of the magnetic shield. The second end of the magnetic shield is connected to the axial balancing unit. The second radial bearing unit also contains a second cover and a second end cover. The second end of the radial stator of the second radial bearing unit 5 is connected to one end of the second end cover, and the other end of the second end cover is connected to the second cover.

[0049] Figure 3 This is a schematic diagram of the structure of the first radial bearing unit 3 of the present invention, combined with... Figure 3Analysis reveals that the first radial bearing unit 3 includes a cover 301, a first end cap 302, a locking assembly 303, a magnetic sleeve 304, a radial stator 305, a cartridge throttle valve assembly 306, a coil 307, a magnetic shield 308, a pipe connector 309, a fifth sealing ring 310, a sixth sealing ring 311, a seventh sealing ring 312, a ninth sealing ring 313, an eighth sealing ring 314, and a tenth sealing ring 315. The first radial bearing unit 3 is bolted to the right side of the fixing bracket 101, with the bolt heads fully inserted into the countersunk holes of the fixing bracket 101. The left end face of the first end cap 302 is in close contact with the right end face of the fixing bracket 101. The coil assemblies 307 are respectively fitted onto the stator columns, and the magnetic shield 308 is bolted to the right end of the radial stator 305, located on the right side of the stator column. The first sealing ring 202, locking assembly 303, and magnetic sleeve 304 are fixed on the rotating shaft 201 from left to right. The pipe connector 309 is connected to the oil inlet hole at the lower end of the radial stator 305. The fifth sealing ring 310 and the sixth sealing ring 311 are installed between the end cover 302 and the radial stator 305. The seventh sealing ring 312 and the eighth sealing ring 314 are installed between the radial stator 305 and the magnetic shield 308. The ninth sealing ring 313 and the tenth sealing ring 315 are installed between the magnetic shield 308 and the axial rear stator 401. The cartridge valve throttle valve assembly 306 is installed along eight circumferentially evenly distributed mounting holes on the outer side of the radial stator 305. The length of the magnetic sleeve 304 is less than the length of the radial stator 305. In the coil assembly 307, the end near the outer ring of the bearing stator is the S pole, and the end near the inner ring of the bearing stator is the N pole. In the magnetic sleeve 304, the inner ring is the S pole, and the outer ring is the N pole.

[0050] Figure 4 This is a schematic diagram of the axial balancing unit of the present invention, combined with... Figure 4Analysis shows that the axial balancing unit 4 includes an axial rear stator 401, a housing 402, a pipe joint 403, an axial front stator 404, a third cover 405, a first axial enameled wire 406, an axial permanent magnet 407, a cartridge throttle valve 408 and a cartridge throttle valve 410, a thrust plate 409, an axial permanent magnet 411, a second axial enameled wire 412, an eleventh sealing ring 413, a twelfth sealing ring 414, a thirteenth sealing ring 415, and a fourteenth sealing ring 416. One end of the axial rear stator 401 is connected to the other end of the magnetic shield, the other end of the axial rear stator 401 is connected to one end of the housing 402, the other end of the housing 402 is connected to one end of the axial front stator 404, the other end of the axial front stator 404 is connected to one end of the third cover 405, one end of the first axial enameled wire 406 is connected to the other end of the axial rear stator 401, one end of the axial permanent magnet 407 is connected to the other end of the axial rear stator 401, the other end of the axial permanent magnet 407 is connected to one end of the thrust plate 409, the other end of the thrust plate 409 is connected to one end of the axial permanent magnet 411, the other end of the axial permanent magnet 411 is connected to one end of the axial front stator 404, and the other end of the second axial enameled wire 412 is connected to one end of the axial front stator 404. Cartridge-mounted throttle valves 408 and 410 are installed at the bottom ends of the axial rear stator 401 and the axial front stator 404.

[0051] The axial balancing unit 4 is bolted to the first radial bearing unit 3, with the left end face of the axial rear stator 401 tightly against the right end face of the magnetic shield 308. The pipe connector 403 is connected to the oil outlet at the upper end of the housing 402. The first axial enameled wire 406 is tightly against the right end of the axial rear stator 401, and the second axial enameled wire 412 is tightly against the left end of the axial front stator 404. The axial rear stator 401, axial permanent magnet 407, thrust plate 409, and axial permanent magnet 411 are sequentially tightly against the axial front stator 404. The axial rear stator 401, housing 402, and axial front stator 404 are connected by bolts. The eleventh sealing ring 413 and the fourteenth sealing ring 416 are installed between the housing 402 and the axial front stator 404, and the twelfth sealing ring 414 and the thirteenth sealing ring 415 are installed between the housing 402 and the axial rear stator 401. Figures 5a-5c As shown, the rear axial stator 401 and the axial permanent magnet 407 and the front axial stator 404 and the axial permanent magnet 411 are both connected by a Tesla valve structure 1001, so that the gap between the axial stator and the axial permanent magnet is a one-way channel.

[0052] In this invention, a Tesla valve structure is introduced between the axial stator and the axial permanent magnet, which allows the oil in the axial bearing to flow in only one direction, increasing the stability of the system. At the same time, the hydraulic pipeline is integrated into the magnetic fluid double suspension bearing system, reducing the volume of the magnetic fluid double suspension bearing. It is also easy to install, has a small size, a compact structure, and simple pipelines.

[0053] Figure 6 This is a schematic diagram of the structure of the second radial bearing unit 5 of the present invention, combined with... Figure 6 Analysis reveals that the second radial bearing unit 5 includes a first cover 501, a first end cover 502, a radial stator 503, a cartridge throttle valve assembly 504, a magnetic sleeve 505, a locking assembly 506, a second cover 507, pipe fittings 508 and 509, a coil 510, a second end cover 511, a fifteenth sealing ring 512, a sixteenth sealing ring 513, and a seventeenth sealing ring 514. The second radial bearing unit 5 is bolted to the right side of the fixing bracket 102, with the bolt heads fully inserted into the countersunk holes of the fixing bracket 102. The left end face of the first end cover 502 is in close contact with the right end face of the fixing bracket 102. The coils 510 are respectively fitted onto the stator columns, and the second end cover 511 is bolted to the right end of the radial stator 503, located on the right side of the stator column. The third sealing ring 204, magnetic sleeve 505, locking assembly 506, and fourth sealing ring 205 are fixed on the rotating shaft 201 from left to right. Pipe joint 508 is connected to the oil inlet at the lower end of the radial stator 503, and pipe joint 509 is connected to the oil outlet at the upper end of the radial stator 503. The fifteenth sealing ring 512 is installed between the first end cover 502 and the radial stator 503, and the sixteenth sealing ring 513 and the seventeenth sealing ring 514 are installed between the radial stator 503 and the second end cover 511. The cartridge valve throttle valve assembly 504 is installed along eight circumferentially evenly distributed mounting holes on the outer side of the radial stator 503. The length of the magnetic sleeve 505 is less than the length of the radial stator 503. In the coil 510, the end near the outer ring of the bearing stator is the S pole, and the end near the inner ring of the bearing stator is the N pole. In the magnetic sleeve 505, the inner ring of the magnetic sleeve is the S pole, and the outer ring of the magnetic sleeve is the N pole.

[0054] The radial stator 305 is provided with a cartridge valve mounting hole, an oil inlet, an oil groove, an oil outlet, a sealing groove, and a threaded hole. The magnetic shield 308 is provided with a magnetic shield oil inlet, a magnetic shield oil outlet, a threaded hole, and a sealing groove in sequence. The axial rear stator 401 is provided with an axial rear stator 401 oil outlet, a cartridge valve mounting hole, a threaded hole, and an oil inlet in sequence. The housing 402 is provided with a housing oil inlet, a housing oil outlet, a threaded hole, and a sealing groove in sequence. The axial front stator 404 is provided with an axial front stator 404 oil inlet, a cartridge valve mounting hole, and a threaded hole in sequence. The radial stator 503 is provided with a cartridge valve mounting hole, an oil inlet, an oil outlet, a wiring hole, an oil groove, a sealing groove, and a threaded hole.

[0055] One end of the first radial bearing unit 3 is connected to one end of the fixed bracket 101 via a hexagon socket head cap screw. One end of the second radial bearing unit 5 is connected to one end of the fixed bracket 102 via a hexagon socket head cap screw. One end of the axial balancing unit 4 is connected to the other end of the first radial bearing unit 3 via a hexagon socket head cap screw. One end of the first end cover 302 is connected to one end of the rotating shaft 201 via a first sealing ring 202. The other end of the axial forward stator 404 is connected to one end of the rotating shaft 201 via a second sealing ring 203. One end of the first end cover 502 is connected to the other end of the rotating shaft 201 via a third sealing ring 204. The other end of the second end cover 511 is connected to the other end of the rotating shaft 201 via a fourth sealing ring 205.

[0056] The first radial bearing unit 3 and the second radial bearing unit 5 each have one oil inlet hole for the radial stator 305 and one oil inlet hole for the radial stator 503. The oil inlet hole for the radial stator 305 is located at the bottom end of the radial stator 305, and the oil inlet hole for the radial stator 503 is located at the bottom end of the radial stator 503. The wiring hole for the radial stator 305 is located at the upper end of the radial stator 305, and the oil outlet hole for the radial stator 305 is located at the other end of the radial stator 305 and communicates with the wiring hole. The wiring hole for the radial stator 503 is located at the upper end of the radial stator 503, and the oil outlet hole for the radial stator 503 is located at the upper end of the radial stator 503 and does not communicate with the oil outlet hole. The pipe connector 309 is connected to the radial stator 305 through the oil inlet hole of the radial stator 305, and the pipe connector 508 is connected to the radial stator 503 through the oil inlet hole of the radial stator 503. The pipe connector 509 is connected to the radial stator 503 through the oil outlet hole of the radial stator 503.

[0057] The radial stator 305 oil groove is located at one end of the radial stator 305, and has eight circumferentially evenly distributed oil holes that lead into the internal stator column of the radial stator 305. The radial stator 503 oil groove is located at the other end of the radial stator 503, and has eight circumferentially evenly distributed oil holes that lead into the internal stator column of the radial stator 503.

[0058] The oil inlet of radial stator 305 is connected to the oil inlet of magnetic shield 308, the oil inlet of radial stator 305 is connected to the oil groove of radial stator 305, and the oil inlet of radial stator 503 is connected to the oil groove of radial stator 503.

[0059] The cartridge throttle valves are installed along the external cartridge valve mounting holes of the radial stator 305 and radial stator 503, and the eight cartridge valve mounting holes are evenly distributed along the outer circumference of the radial stator.

[0060] The oil inlet of the magnetic shield 308 is located at the bottom of the magnetic shield 308 and communicates with the oil inlet of the radial stator 305. Both ends of the magnetic shield 308 are provided with sealing grooves. The oil outlet of the magnetic shield 308 is located at the top of the magnetic shield 308 and communicates with the oil outlet of the radial stator 305.

[0061] The oil outlet of the axial rear stator 401 is located at the upper end of the axial rear stator 401 and communicates with the oil outlet of the magnetic shield 308. The oil inlet of the axial rear stator 401 is located at the bottom end of the axial rear stator 401 and communicates with the oil outlets of the magnetic shield 308 and the housing 402. The cartridge valve mounting hole of the axial rear stator 401 is located at the bottom end of the axial rear stator 401. The axial permanent magnet 407, the thrust plate 409 and the axial permanent magnet 411 are connected by internal hexagonal head screws.

[0062] The oil inlet of housing 402 is located at the bottom of housing 402 and communicates with the oil inlet of axial rear stator 401. The oil outlet of housing 402 is located at the top of housing 402. Pipe joint 403 is connected to housing 402 through the oil outlet of housing 402. Both ends of housing 402 are provided with sealing grooves.

[0063] The oil inlet of the axial front stator 404 is located at the bottom end of the axial front stator 404 and communicates with the oil inlet of the housing 402. The cartridge valve mounting hole of the axial front stator 404 is located at the bottom end of the axial front stator 404.

[0064] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A repulsive type magnetic fluid dual suspension bearing quantitative oil supply system, characterized in that: It includes a support unit, a rotating shaft, a first radial bearing unit, an axial balancing unit, a second radial bearing unit, and a power unit. The first radial bearing unit, the axial balancing unit, and the second radial bearing unit are sequentially sleeved on the rotating shaft, and the axes of the rotating shaft, the first radial bearing unit, the axial balancing unit, and the second radial bearing unit are located on the same straight line. A fixing bracket for fixing the first radial bearing unit and the second radial bearing unit is provided below the rotating shaft. The first end of the first radial bearing unit and the first end of the second radial bearing unit are respectively connected to one end of the fixing bracket, and the second end of the first radial bearing unit and the second end of the second radial bearing unit are respectively connected to the axial balancing unit. Both the first radial bearing unit and the second radial bearing unit include a first cover, a first end cover, a locking kit, a magnetic sleeve, a radial stator, a cartridge throttle valve assembly, a coil assembly, a pipe joint, and multiple sealing rings. The magnetic sleeve is installed on one side of the rotating shaft, and one end of the magnetic sleeve contacts the second shoulder of the rotating shaft. The coil assembly is located outside the magnetic sleeve and is fixedly connected to the stator column of the radial stator. The radial stator is sleeved on the outside of the coil assembly, and the first end of the radial stator is connected to one end of the first end cover. The first cover is connected to the other end of the first end cover. Multiple stator columns for connecting the coil assembly are provided inside the radial stator. The cartridge throttle valve assembly is evenly installed along the circumference of the radial stator. The first radial bearing unit is also provided with a magnetic shield, and the second end of the radial stator of the first radial bearing unit is connected to the first end of the magnetic shield; the second end of the magnetic shield is connected to the axial balance unit. The second radial bearing unit is further provided with a second cover and a second end cover. The second end of the radial stator of the second radial bearing unit is connected to one end of the second end cover, and the other end of the second end cover is connected to the second cover. The axial balancing unit includes an axial rear stator, a housing, a pipe joint, an axial front stator, a third cover, a first axial enameled wire, a first axial permanent magnet, cartridge throttle valves, a thrust plate, a second axial permanent magnet, a second axial enameled wire, and multiple sealing rings. The first end of the axial rear stator is connected to the second end of the magnetic isolation body, the second end of the axial rear stator is connected to the first end of the housing, the second end of the housing is connected to the first end of the axial front stator, the second end of the axial front stator is connected to one end of the third cover, the first ends of the first axial enameled wire and the first axial permanent magnet are respectively connected to the second end of the axial rear stator, the second end of the first axial permanent magnet is connected to the first end of the thrust plate, the second end of the thrust plate is connected to the first end of the second axial permanent magnet, the second end of the second axial permanent magnet is connected to the first end of the axial front stator, and the second end of the second axial enameled wire is connected to the second end of the axial front stator. Two sets of cartridge throttle valves are respectively installed at the bottom ends of the axial rear stator and the axial front stator.

2. The repulsive type magnetic fluid dual suspension bearing quantitative oil supply system according to claim 1, characterized in that: The first radial bearing unit and the second radial bearing unit are provided with an oil inlet hole, an oil groove and a sealing groove at the bottom, an oil hole communicating with the magnetic shield, an upper wiring hole and an oil outlet hole and a threaded hole, and the wiring hole and the oil outlet hole share a channel, which flows out from the side channel after the wiring is led out.

3. The quantitative oil supply system for a repulsive type magnetic fluid dual suspension bearing according to claim 1, characterized in that: The length of the magnetic sleeve of the first radial bearing unit and the second radial bearing unit is less than the length of the radial stator. In the coil group, the end near the outer ring of the bearing stator is the S pole, and the end near the inner ring of the bearing stator is the N pole. In the magnetic sleeve of the first radial bearing unit, the inner ring of the magnetic sleeve is the S pole, and the outer ring of the magnetic sleeve is the N pole.

4. The repulsive type magnetic fluid dual suspension bearing quantitative oil supply system according to claim 1, characterized in that: The rear axial stator and the axial permanent magnet, as well as the front axial stator and the axial permanent magnet, are connected by a Tesla valve structure, making the gap between the axial stator and the axial permanent magnet a one-way channel.

5. The repulsive type magnetic fluid dual suspension bearing quantitative oil supply system according to claim 1, characterized in that: The radial stators of the first and second radial bearing units are provided with cartridge valve mounting holes, oil inlets, oil grooves, oil outlets, sealing grooves, and threaded holes. The magnetic shielding body of the first radial bearing unit is provided with magnetic shielding body oil inlets, magnetic shielding body oil outlets, threaded holes, and sealing grooves in sequence. The axial rear stator is provided with axial rear stator oil outlets, cartridge valve mounting holes, threaded holes, and oil inlets in sequence. The housing is provided with housing oil inlets, housing oil outlets, threaded holes, and sealing grooves in sequence. The axial front stator is provided with axial front stator oil inlets, cartridge valve mounting holes, and threaded holes in sequence.

6. The repulsive type magnetic fluid dual suspension bearing quantitative oil supply system according to claim 1, characterized in that: The first ends of the first radial bearing unit and the second radial bearing unit are respectively connected to one end of the fixed bracket by hexagonal head screws, and the outer end of the axial balance unit is connected to the second end of the first radial bearing unit by hexagonal head screws.

7. The repulsive type magnetic fluid dual suspension bearing quantitative oil supply system according to claim 5, characterized in that: The oil inlet holes of the radial stators of both the first and second radial bearing units are located at the bottom of the radial stator and there is only one in each unit; the wiring holes of the radial stators of both units are located at the upper end of the radial stator; the oil outlet hole of the radial stator of the first radial bearing unit is located at the other end of the radial stator and is connected to the wiring hole; the oil outlet hole of the radial stator of the second radial bearing unit is located at the upper end of the radial stator and is not connected to the oil outlet hole; the pipe joints of the first and second radial bearing units are connected to the radial stator through the radial stator oil inlet holes respectively. The radial stator oil grooves of the first radial bearing unit and the second radial bearing unit are located at one end of the radial stator and have eight circumferentially evenly distributed oil holes that lead into the internal stator column of the radial stator. The radial stator oil inlet and the magnetic shielding oil inlet of the first radial bearing unit are connected to the radial stator oil groove, and the radial stator oil inlet and the radial stator oil groove of the second radial bearing unit are connected. The oil inlet of the magnetic shielding body of the first radial bearing unit is located at the bottom end of the magnetic shielding body and communicates with the oil inlet of the radial stator. Both ends of the magnetic shielding body are provided with sealing grooves. The oil outlet of the magnetic shielding body is located at the top end of the magnetic shielding body and communicates with the oil outlet of the radial stator. The axial rear stator oil outlet is located at the upper end of the axial rear stator and communicates with the oil outlet of the magnetic shield; the axial rear stator oil inlet is located at the bottom end of the axial rear stator and communicates with the oil outlets of the magnetic shield and the housing; and the axial rear stator cartridge valve mounting hole is located at the bottom end of the axial rear stator. The oil inlet of the housing is located at the bottom of the housing and communicates with the oil inlet of the axial rear stator. The oil outlet of the housing is located at the top of the housing. The pipe joint is connected to the housing through the oil outlet of the housing. Both ends of the housing are provided with sealing grooves. The axial front stator oil inlet is located at the bottom of the axial front stator and communicates with the housing oil inlet. The axial front stator cartridge valve mounting hole is located at the bottom of the axial front stator.

8. The repulsive type magnetic fluid dual suspension bearing quantitative oil supply system according to claim 7, characterized in that: The radial stator of the first radial bearing unit and the second radial bearing unit is provided with eight circumferentially evenly distributed cartridge throttle valve sockets. The cartridge throttle valve sockets are used to install cartridge throttle valves to regulate hydraulic oil in eight directions.

9. The repulsive type magnetic fluid dual suspension bearing quantitative oil supply system according to claim 8, characterized in that: Both the first radial bearing unit and the second radial bearing unit have oil grooves in their radial stators, each equipped with eight circumferentially evenly distributed oil holes that lead into the stator columns of the radial stator.

10. The repulsive type magnetic fluid dual suspension bearing quantitative oil supply system according to claim 1, characterized in that: The multiple sealing rings are designated as the first sealing ring, second sealing ring, third sealing ring, fourth sealing ring, fifth sealing ring, sixth sealing ring, seventh sealing ring, eighth sealing ring, ninth sealing ring, tenth sealing ring, eleventh sealing ring, twelfth sealing ring, thirteenth sealing ring, fourteenth sealing ring, fifteenth sealing ring, sixteenth sealing ring, and seventeenth sealing ring. The first sealing ring is located at the connection between the rotating shaft and the first end cover of the first radial bearing unit to prevent oil leakage from the first radial balancing unit. The second sealing ring is located at the connection between the rotating shaft and the axially forward stator to prevent oil leakage from the axial balancing unit. To prevent leakage, a third sealing ring is installed at the connection between the rotating shaft and the first end cover of the second radial bearing unit to prevent oil leakage from inside the second radial balancing unit. A fourth sealing ring is installed at the connection between the rotating shaft and the second end cover of the second radial bearing unit to prevent oil leakage from inside the radial balancing unit. Fifth and sixth sealing rings are installed at the connection between the first end cover of the first radial bearing unit and the radial stator to prevent oil leakage from the oil groove and from inside the radial balancing unit. A seventh sealing ring is installed at the connection between the radial stator of the first radial bearing unit and the magnetic shield to prevent oil leakage from inside the radial balancing unit. Leakage is prevented by the following seals: the eighth seal is located at the connection between the magnetic shield and the axial rear stator of the first radial bearing unit to prevent oil leakage from the oil outlet; the ninth seal is located at the connection between the radial stator and the oil inlet of the magnetic shield of the first radial bearing unit to prevent oil leakage from the pipeline; the tenth seal is located at the connection between the magnetic shield and the oil inlet of the axial rear stator of the first radial bearing unit to prevent oil leakage from the oil inlet; the eleventh seal is located at the connection between the front and rear stators and the housing to prevent oil leakage from the axial balance unit; and the twelfth seal is located at the connection between the axial rear stator and the housing to prevent axial leakage. To prevent oil leakage from the balancing unit, the thirteenth sealing ring is installed at the connection between the axial rear stator and the housing oil inlet to prevent oil leakage from the pipeline; the fourteenth sealing ring is installed at the connection between the axial front stator and the housing oil inlet to prevent oil leakage from the pipeline; the fifteenth sealing ring is installed at the connection between the first end cover of the second radial bearing unit and the radial stator to prevent oil leakage from the radial balancing unit; and the sixteenth and seventeenth sealing rings are installed at the connection between the second end cover of the second radial bearing unit and the radial stator to prevent oil leakage from the oil tank and the radial balancing unit.

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