CN111981040B

CN111981040B - Magnetic axial bearing

Info

Publication number: CN111981040B
Application number: CN202010726277.8A
Authority: CN
Inventors: 杨晓燕; 马露; 吴玉坤
Original assignee: Shandong Cooper Bearing Technology Service Co ltd; Shandong Camery Kmr Bearing Science & Technology Co ltd
Current assignee: SHANDONG CAMERY (KMR) BEARING SCIENCE & TECHNOLOGY CO.,LTD.; Shandong Cooper Bearing Technology Co., Ltd
Priority date: 2020-07-25
Filing date: 2020-07-25
Publication date: 2021-12-28
Anticipated expiration: 2040-07-25
Also published as: CN111981040A

Abstract

The invention belongs to the technical field of magnetic bearings, and particularly relates to a magnetic axial bearing; comprises a stator seat, a pushing disc and a sealing block; a pushing disc is arranged inside the stator seat; the upper surface and the lower surface of the pushing disc are fixedly connected with a first rotating column and a second rotating column respectively; the stator seat is provided with the sealing blocks which are uniformly distributed at the positions of the first rotating column and the second rotating column respectively, so that the automatic sealing of the magnetic axial bearing is effectively realized, the phenomenon that the normal use of an electromagnet is influenced when liquid flows into the bearing under the environment condition of liquid use is avoided, meanwhile, the flow of air in the bearing is promoted through the pressurization of the fan blades, and the quick heat dissipation in the bearing is realized.

Description

Magnetic axial bearing

Technical Field

The invention belongs to the technical field of magnetic bearings, and particularly relates to a magnetic axial bearing.

Background

The magnetic suspension bearing uses the magnetic force action to suspend the rotor in the air, so that there is no mechanical contact between the rotor and the stator, and its principle is that the magnetic induction line is perpendicular to the magnetic suspension line, the shaft core is parallel to the magnetic suspension line, so that the weight of the rotor is fixed on the running track, and the shaft core with almost no load is used to prop against the direction of the magnetic suspension line, so that the whole rotor is suspended in the air, on the fixed running track, compared with traditional ball bearing, sliding bearing and oil film bearing, the magnetic bearing has no mechanical contact, the rotor can run to a very high rotation speed, and it has the advantages of small mechanical wear, small noise, long service life, no need of lubrication, no oil pollution, etc.

According to CN1466662A a magnetic bearing, in the prior art, on the one hand, the magnetic axial bearing adopts electromagnetism, so the iron core that the winding coil is wound can produce a large amount of heat, the continuous accumulation of heat can influence the winding coil to normally produce the magnetic field, simultaneously, overheating can also lead to the damage of bearing easily, on the other hand because the magnetic axial bearing is in order to avoid rotating the friction problem as far as possible, the thrust disc, first rotation post and second rotation post all can reserve the clearance with between the stator seat, but when easily flowing into a large amount of liquid or directly being used for in the liquid environment in the service environment of magnetic axial bearing, a large amount of liquid enters into the inside of magnetic axial bearing through reserving the clearance easily, and then lead to the problem such as the damage of magnetic axial bearing.

In view of the above, in order to overcome the above technical problems, the present inventors have designed and developed a magnetic axial bearing, which solves the above technical problems.

Disclosure of Invention

In order to make up the defects of the prior art and solve the problems that in the prior art, on one hand, an iron core wound by a winding coil can generate a large amount of heat due to the fact that the magnetic axial bearing adopts electromagnetism, the heat is accumulated continuously to influence the normal generation of a magnetic field of the winding coil, and meanwhile, the bearing is easy to damage due to overheating, and on the other hand, as the magnetic axial bearing is used for avoiding the problem of rotation friction as far as possible, gaps are reserved between a pushing disc, a first rotating column and a second rotating column and a stator seat, but when a large amount of liquid is easy to flow into the use environment of the magnetic axial bearing or is directly used in the liquid environment, the large amount of liquid is easy to enter the interior of the magnetic axial bearing through the reserved gaps, so that the magnetic axial bearing is damaged, and the like.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a magnetic axial bearing, which comprises a stator seat, a pushing disc and a sealing block; the stator seat is designed into a cylindrical structure; the outer cambered surface of the stator seat is fixedly connected with a fixing ring; an annular suspension cavity is formed in the stator seat; the upper end face and the lower end face of the stator seat are respectively provided with a first rotating hole and a second rotating hole, and the first rotating hole and the second rotating hole are used for communicating the suspension cavity with the outside of the magnetic axial bearing; a pushing disc is arranged inside the suspension cavity; the upper end surface and the lower end surface of the pushing disc are fixedly connected with a first rotating column and a second rotating column respectively at the first rotating hole and the second rotating hole; the upper surface and the lower surface of the pushing disc are provided with first mounting holes which are uniformly distributed; the inner parts of the first installation parts are fixedly connected with first electromagnets; second mounting holes are formed in the inner surface of the stator seat at the positions of the first mounting holes; the inner parts of the second mounting holes are fixedly connected with second electromagnets; the outer arc surface of the pushing disc is provided with third mounting holes which are uniformly distributed; the inner parts of the third mounting holes are fixedly connected with third electromagnets; fourth mounting holes are formed in the inner arc surface of the stator seat at the third mounting hole; the inner parts of the fourth mounting holes are fixedly connected with fourth electromagnets; the upper surface of the stator seat is provided with uniformly distributed adjusting holes, and the adjusting holes are used for communicating the suspension cavity with the outside; the first pressure sheets are arranged inside the adjusting holes; the side surfaces of the first pressure plates, which are opposite to one side of the pushing disc, are fixedly connected with pushing rods; the lower surfaces of the push rods are fixedly connected with cross rods; the lower surface of the cross rod is fixedly connected with first telescopic rods at the positions close to the end surfaces of the two sides of the cross rod; the inner arc surface of the first mounting hole is provided with uniformly distributed sealing grooves; the sealing blocks are connected inside the sealing grooves in a sliding manner; second telescopic rods which are uniformly arranged are fixedly connected between the sealing block and the groove bottom of the sealing groove; the outer arc surface of the second rotating column is fixedly connected with uniformly arranged fan blades at the position of the second rotating hole; when the magnetic axial bearing works, the pushing disc in the stator seat is in a suspended state in the rotating process through the electromagnet and can be completely separated from the stator seat, so that the magnetic bearing can avoid abrasion and friction resistance in the using process, but in the prior art, on one hand, because the magnetic axial bearing adopts electromagnetism, an iron core wound by a winding coil can generate a large amount of heat, the continuous accumulation of the heat can influence the normal generation of a magnetic field of the winding coil, and simultaneously, overheating can easily cause the damage of the bearing, on the other hand, because the magnetic axial bearing aims at avoiding the problem of the rotation friction as much as possible, gaps are reserved between the pushing disc, the first rotating column and the second rotating column and the stator seat, but when a large amount of liquid easily flows into the using environment of the magnetic axial bearing or is directly used in the liquid environment, when the invention is applied to a liquid environment, due to the liquid pressure, the first pressure sheet in the adjusting hole can move downwards, the first pressure sheet can further drive the push rod to move downwards, the push rod can further drive the first telescopic rod to extend and retract through the cross rod, due to the communication between the first telescopic rod and the second telescopic rod, the compression of the first telescopic rod can drive the second telescopic rod to extend, the second telescopic rod can drive the sealing block to fold, the sealing is realized, the liquid is prevented from entering the suspension cavity through the gap around the first rotating column, the normal use of the electromagnet is influenced, meanwhile, the liquid can also influence the rotation of the push disk, when the push disk, the first rotating column and the second rotating column rotate, the fan blades on the surface of the second rotating column can generate wind power, air in the external environment is continuously led into the suspension cavity, air pressure in the suspension cavity is increased, the first pressure plate moves upwards, the second telescopic rod is further contracted, the sealing blocks are separated and opened, the air can be continuously led into a liquid environment through gaps, on one hand, a large amount of heat generated by the electromagnet can be taken away by the flowing of the air, and on the other hand, liquid backflow can be avoided by the air pressure.

Preferably, the inner part of the first rotating hole is fixedly connected with an elastic sealing gasket, and the sealing blocks are all positioned in a space enclosed between the elastic sealing gasket and the stator seat; during operation, through all wrapping up sealing block in the inside of elastic sealing pad, sealing block when closing up sealed, elastic sealing pad can be totally with the parcel of linking department between the sealing block, has avoided liquid to pass through linking department between the sealing block, and reverse infiltration is to the suspension intracavity, consequently very big increase the leakproofness of bearing.

Preferably, the outer surface of the elastic sealing gasket is fixedly connected with annular sealing rings which are uniformly arranged in the vertical direction at the position of the facing surface of the first rotating column; the annular sealing rings are all made of soft rubber materials; the during operation, by the smooth surperficial direct and the first rotation between the post face of pasting realization sealed effect of elastic sealing pad, consequently sealed effect is comparatively limited, when liquid pressure is great, the seepage problem appears easily, consequently through linking firmly the ring packing who evenly arranges for first rotation post one side at elastic sealing pad, the area of contact between elastic sealing pad and the first rotation post that reduces that can be very big through ring packing, consequently contact pressure increases, and then sealed effect increases by a wide margin.

Preferably, the outer arc surface of the first rotating column is provided with a first rotating groove at the position of the sealing block; a first rotating ring is rotatably connected inside the first rotating groove; the during operation, because ring packing has great pressure and area of contact less with first rotation post surface, consequently frictional force is great, just begin to rotate the in-process when magnetic force axial bearing, because the inside atmospheric pressure in suspension chamber is less, frictional force between ring packing and the first rotation post can be great, during the start-up rotation, it is comparatively difficult, consequently through setting up first rotation ring, through the first rotation inslot rotation of first rotation ring at first rotation post surface, when the bearing is originated to rotate, can realize easily rotating, the destruction to the structure of sealing member has been avoided.

Preferably, through holes are uniformly distributed in the vertical direction on the surface of the pushing disc, the through holes and the first mounting holes are alternately distributed, and the upper side and the lower side of the pushing disc are communicated through the through holes; the during operation, because the electromagnetic force needs between push disk and the stator seat, consequently, the clearance distance of reserving is less, but the wind-force that the fan blade produced all need enter into the top space that pushes away the dish through this clearance is continuous, because the circulation route is comparatively narrow, consequently, can produce great pressure differential, be unfavorable for the regulation of first pressure gauge pressure, consequently, through the through-hole of evenly arranging is seted up on the surface at the push disk, consequently, the air current can be through the quick flow of through-hole, reduce the pressure differential from top to bottom of push disk, the air circulation rate improves and the area of contact of push disk and air increases simultaneously, consequently, the heat that the electro-magnet produced can more quick take away, reduce the temperature in the suspension intracavity.

Preferably, a second pressure plate and a third telescopic rod are arranged inside each stator seat; a sealing groove is also formed in the second rotating hole, and sealing blocks are connected to the inside of the sealing groove in a sliding manner; a fourth telescopic rod is arranged between the sealing block and the groove bottom of the sealing groove, and elastic sealing gaskets with annular sealing rings are wrapped outside the sealing block; a second rotating groove is formed in the outer arc surface of the second rotating column corresponding to the position of the sealing block; the inner parts of the second rotating grooves are rotatably connected with second rotating rings; when the magnetic axial bearing works, when the pressure of the liquid environment used by the magnetic axial bearing is small or the liquid is not continuously kept, the hydraulic environment generated by the liquid is unstable, and meanwhile, when the magnetic axial bearing is not used, in order to avoid that external dust is placed for a long time to enter the interior of the bearing to influence the use, a sealing structure with the same position as the upper surface of the stator seat is arranged at the lower surface of the stator seat, different from the sealing structure, when the second pressure plate moves downwards, the fourth telescopic rod contracts, when the second pressure plate moves upwards, the fourth telescopic rod extends out, so when the bearing is stopped to use, in order to enable the bearing to have better sealing performance, the air pressure in the suspension cavity is rapidly reduced by enabling the bearing to rotate reversely, therefore, the synchronous sealing of the gaps between the first rotating hole and the second rotating hole can be realized, the sealing pressure is high, and the dust falling in the bearing can be avoided, meanwhile, the problems of unstable pressure of the liquid environment and fluctuation of the sealing effect are avoided.

The invention has the following beneficial effects:

1. according to the magnetic axial bearing, the stator seat, the pushing disc and the sealing blocks are arranged, the pushing disc is arranged in the stator seat, the upper surface and the lower surface of the pushing disc are fixedly connected with the first rotating column and the second rotating column respectively, and the stator seat is provided with the sealing blocks which are uniformly distributed at the positions of the first rotating column and the second rotating column respectively, so that the automatic sealing of the magnetic axial bearing is effectively realized, the phenomenon that liquid flows into the bearing to influence the normal use of an electromagnet under the environment condition of liquid use is avoided, meanwhile, the flow of air in the bearing is promoted through the pressurization of the fan blades, and the rapid heat dissipation in the bearing is realized.

2. According to the magnetic axial bearing, the elastic sealing gasket, the annular sealing ring and the first rotating ring are arranged, the joint between the sealing blocks can be completely wrapped through the elastic sealing gasket, liquid is prevented from reversely permeating into the suspension cavity through the joint between the sealing blocks, and therefore the sealing performance of the bearing is greatly improved by fixedly connecting the annular sealing ring which is uniformly arranged on the side face of the elastic sealing gasket, which is opposite to the side face of the first rotating column; the contact area between the elastic sealing gasket and the first rotating column can be greatly reduced through the annular sealing ring, so that the contact pressure is increased, and the sealing effect is greatly increased; through setting up first rotating ring, through first rotating ring at the first rotation inslot rotation on first rotation post surface, when the bearing is originated to rotate, can realize light the rotation, avoided the destruction to the structure of sealing member.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is an external view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

FIG. 5 is an enlarged partial view at B in FIG. 4;

FIG. 6 is an enlarged partial view at C of FIG. 4;

in the figure: the stator comprises a stator seat 1, a fixed ring 11, a first pressure sheet 12, a push rod 13, a first telescopic rod 14, a fan blade 15, a push disk 2, a first rotating column 21, a second rotating column 22, a first rotating ring 23, a sealing block 3, a second telescopic rod 31, an elastic sealing gasket 32, an annular sealing ring 33, a second pressure sheet 34, a third telescopic rod 35, a fourth telescopic rod 36 and a second rotating ring 37.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 6, the magnetic axial bearing of the present invention comprises a stator seat 1, a thrust plate 2 and a sealing block 3; the stator seat 1 is designed into a cylindrical structure; the outer cambered surface of the stator seat 1 is fixedly connected with a fixing ring 11; an annular suspension cavity is formed in the stator seat 1; a first rotating hole and a second rotating hole are respectively formed in the upper end face and the lower end face of the stator seat 1, and the first rotating hole and the second rotating hole are used for communicating the suspension cavity with the outside of the magnetic axial bearing; a pushing disc 2 is arranged in the suspension cavity; the upper end surface and the lower end surface of the pushing disc 2 are fixedly connected with a first rotating column 21 and a second rotating column 22 at the positions of the first rotating hole and the second rotating hole respectively; the upper surface and the lower surface of the pushing disc 2 are provided with first mounting holes which are uniformly distributed; the inner parts of the first installation parts are fixedly connected with first electromagnets; second mounting holes are formed in the inner surface of the stator seat 1 at the positions of the first mounting holes; the inner parts of the second mounting holes are fixedly connected with second electromagnets; the outer arc surface of the pushing disc 2 is provided with third mounting holes which are uniformly distributed; the inner parts of the third mounting holes are fixedly connected with third electromagnets; fourth mounting holes are formed in the inner arc surface of the stator seat 1 at the third mounting hole; the inner parts of the fourth mounting holes are fixedly connected with fourth electromagnets; the upper surface of the stator seat 1 is provided with uniformly arranged adjusting holes, and the adjusting holes are used for communicating the suspension cavity with the outside; the first pressure plates 12 are arranged inside the adjusting holes; the side surfaces of the first pressure plates 12, which are opposite to one side of the pushing disc 2, are fixedly connected with pushing rods 13; the lower surfaces of the push rods 13 are fixedly connected with cross rods; the lower surface of the cross rod is fixedly connected with first telescopic rods 14 at the positions close to the end surfaces of the two sides of the cross rod; the inner arc surface of the first mounting hole is provided with uniformly distributed sealing grooves; the sealing blocks 3 are connected inside the sealing grooves in a sliding manner; second telescopic rods 31 which are uniformly arranged are fixedly connected between the sealing block 3 and the groove bottom of the sealing groove; the outer arc surface of the second rotating column 22 is fixedly connected with uniformly arranged fan blades 15 at the second rotating hole; when the magnetic axial bearing works, the pushing disc 2 in the stator seat 1 is in a suspended state in the rotating process through the electromagnet and can be completely separated from the stator seat 1, so that the magnetic bearing can avoid abrasion and friction resistance in the using process, but in the prior art, on one hand, because the magnetic axial bearing adopts electromagnetism, an iron core wound by a winding coil can generate a large amount of heat, the continuous accumulation of the heat can influence the normal generation of a magnetic field of the winding coil, and simultaneously, overheating can easily cause the damage of the bearing, on the other hand, because the magnetic axial bearing aims at avoiding the problem of the rotation friction as much as possible, gaps are reserved between the pushing disc 2, the first rotating column 21 and the second rotating column 22 and the stator seat 1, but when a large amount of liquid easily flows into the using environment of the magnetic axial bearing or the magnetic axial bearing is directly used in the liquid environment, therefore, according to the invention, when the device is applied to a liquid environment, due to the liquid pressure, the first pressure plate 12 inside the adjusting hole can move downwards, the first pressure plate 12 can further drive the push rod 13 to move downwards, the push rod 13 can further drive the first telescopic rod 14 to stretch through the cross rod, due to the communication between the first telescopic rod 14 and the second telescopic rod 31, the compression of the first telescopic rod 14 can drive the second telescopic rod 31 to stretch out, the second telescopic rod 31 can drive the sealing block 3 to fold, sealing is realized, the liquid is prevented from entering a suspension cavity through the gap around the first rotating column 21, the normal use of an electromagnet is further influenced, meanwhile, the liquid can also influence the rotation of the push disc 2, and when the push disc 2 is used, the device can be used for preventing the liquid from entering the suspension cavity through the gap around the first rotating column 21, When the first rotating column 21 and the second rotating column 22 rotate, the fan blades 15 on the surface of the second rotating column 22 can generate wind power, air in the external environment is continuously led into the suspension cavity, the air pressure in the suspension cavity is increased, the first pressure plate 12 moves upwards, the second telescopic rod 31 is further contracted, the sealing blocks 3 are separated and opened, the air can be continuously led into the liquid environment through gaps, on one hand, a large amount of heat generated by the electromagnet can be taken away by the flowing of the air, on the other hand, the backflow of liquid can be avoided by the air pressure at the moment, through the magnetic axial bearing, the automatic sealing of the magnetic axial bearing is effectively realized, the situation that the normal use of the electromagnet is influenced by the fact that the liquid flows into the bearing under the environment condition that the liquid is used is avoided, meanwhile, the flowing of the air in the bearing is promoted through the pressurization of the fan blades 15, and the rapid heat dissipation in the bearing is realized.

As an embodiment of the present invention, an elastic sealing gasket 32 is fixedly connected inside the first rotating hole, and the sealing blocks 3 are all located in a space enclosed between the elastic sealing gasket 32 and the stator seat 1; during operation, through all wrapping up sealed piece 3 in the inside of elastic sealing pad 32, sealed piece 3 is when closing up sealed, and elastic sealing pad 32 can be completely with the parcel of linking department between the sealed piece 3, has avoided liquid to pass through linking department between the sealed piece 3, and reverse infiltration is to the suspension intracavity, consequently very big increase the leakproofness of bearing.

As an embodiment of the present invention, the outer surface of the elastic sealing gasket 32 is fixedly connected with annular sealing rings 33 uniformly arranged in the up-down direction at the facing position of the first rotating column 21; the annular sealing rings 33 are all made of soft rubber materials; the during operation, directly paste the realization sealed effect with first rotation post 21 between face by the smooth surface of elastic sealing pad 32, consequently sealed effect is comparatively limited, when liquid pressure is great, the seepage problem appears easily, consequently, through linking firmly the annular seal 33 of evenly arranging at elastic sealing pad 32 for first rotation post 21 one side, the area of contact between elastic sealing pad 32 and the first rotation post 21 that reduces that can be very big through annular seal 33, consequently, contact pressure increases, and then sealed effect increases by a wide margin.

As an embodiment of the present invention, the outer arc surface of the first rotating column 21 is provided with a first rotating groove at the position of the sealing block 3; a first rotating ring 23 is rotatably connected inside the first rotating groove; the during operation, because ring seal 33 has great pressure and area of contact less with first rotation post 21 surface, consequently frictional force is great, just begin to rotate the in-process when magnetic force axial bearing, because the inside atmospheric pressure in suspension chamber is less, frictional force between ring seal 33 and the first rotation post 21 can be great, during the start-up rotation, it is comparatively difficult, consequently, through setting up first rotating ring 23, through first rotating ring 23 at the first rotation inslot rotation on first rotation post 21 surface, during the bearing initial rotation, can realize light rotation, the destruction to the structure of sealing member has been avoided.

As an embodiment of the invention, through holes are uniformly arranged in the vertical direction on the surface of the pushing disc 2, the through holes and the first mounting holes are alternately distributed, and the through holes communicate the upper side and the lower side of the pushing disc 2; the during operation, because the electromagnetic force needs between push disk 2 and the stator seat 1, consequently, the clearance distance of reserving is less, but the wind-force that fan blade 15 produced all need enter into the top space that pushes away dish 2 through this clearance is continuous, because the circulation route is comparatively narrow, consequently, can produce great pressure differential, be unfavorable for the regulation of first pressure gauge 12 pressure, consequently, through the through-hole of evenly arranging is seted up on the surface at push disk 2, consequently, the air current can be through the quick flow of through-hole, reduce the pressure differential from top to bottom of push disk 2, the while air circulation rate improves and the area of contact of push disk 2 and air increases, consequently, the heat that the electro-magnet produced can be taken away more quickly, reduce the temperature in the suspension intracavity.

As an embodiment of the present invention, a second pressure plate 34 and a third expansion link 35 are disposed inside the stator seat 1; a sealing groove is also formed in the second rotating hole, and sealing blocks 3 are connected in the sealing groove in a sliding manner; a fourth telescopic rod 36 is arranged between the sealing block 3 and the groove bottom of the sealing groove, and the elastic sealing gaskets 32 with annular sealing rings 33 are wrapped outside the sealing block 3; a second rotating groove is formed in the outer arc surface of the second rotating column 22 corresponding to the position of the sealing block 3; a second rotating ring 37 is rotatably connected inside each second rotating groove; when the magnetic axial bearing works, when the pressure of the liquid environment used by the magnetic axial bearing is small or the liquid is not continuously kept, the hydraulic environment generated by the liquid is unstable, and meanwhile, when the magnetic axial bearing is not used, in order to avoid that external dust is placed for a long time to enter the interior of the bearing to influence the use, a sealing structure with the same position as the upper surface of the stator seat 1 is arranged at the lower surface of the stator seat 1, different from the sealing structure, when the second pressure plate 34 moves downwards, the fourth telescopic rod 36 contracts, when the second pressure plate 34 moves upwards, the fourth telescopic rod 36 extends out, when the bearing is stopped to use, in order to enable the bearing to have better sealing performance, the air pressure in the suspension cavity is rapidly reduced by reversely rotating the bearing, so that the synchronous sealing of the position gaps of the first rotating hole and the second rotating hole can be realized, and the sealing pressure is large, the inner part of the bearing can be prevented from falling ash, and meanwhile, the problems of unstable pressure of the liquid environment and fluctuation of the sealing effect are avoided.

The specific working process is as follows:

when the electromagnetic suspension device is used in a liquid environment, due to the liquid pressure, the first pressure plate 12 inside the adjusting hole can move downwards, the first pressure plate 12 can further drive the push rod 13 to move downwards, the push rod 13 can further drive the first telescopic rod 14 to stretch through the cross rod, due to the communication between the first telescopic rod 14 and the second telescopic rod 31, the compression of the first telescopic rod 14 can drive the second telescopic rod 31 to stretch out, the second telescopic rod 31 can drive the sealing block 3 to fold, sealing is realized, the liquid is prevented from entering the suspension cavity through the gap around the first rotating column 21, the normal use of an electromagnet is further influenced, meanwhile, the liquid can also influence the rotation of the push disk 2, when the push disk 2, the first rotating column 21 and the second rotating column 22 rotate, the fan blades 15 on the surface of the second rotating column 22 can generate wind power, and the air in the external environment is continuously led into the suspension cavity, the air pressure in the suspension cavity is increased, the first pressure plate 12 moves upwards, the second telescopic rod 31 is contracted, the sealing block 3 is separated and opened, and air can be continuously led into a liquid environment through a gap, so that on one hand, a large amount of heat generated by the electromagnet can be taken away by the flowing of air, and on the other hand, the backflow of liquid can be avoided by the air pressure; by fixedly connecting the annular sealing ring 33 which is uniformly arranged on the side surface of the elastic sealing gasket 32 opposite to one side of the first rotating column 21, the contact area between the elastic sealing gasket 32 and the first rotating column 21 can be greatly reduced through the annular sealing ring 33, so that the contact pressure is increased, and the sealing effect is greatly increased; by arranging the first rotating ring 23, the first rotating ring 23 rotates in the first rotating groove on the surface of the first rotating column 21, so that the bearing can rotate easily when rotating initially, and the structure of a sealing element is prevented from being damaged; through the through holes uniformly distributed on the surface of the push disc 2, airflow can rapidly flow through the through holes, so that the pressure difference between the upper part and the lower part of the push disc 2 is reduced, meanwhile, the air circulation rate is improved, and the contact area between the push disc 2 and air is increased, so that heat generated by the electromagnet can be taken away more rapidly; through setting up the seal structure the same with 1 upper surface position of stator seat in 1 lower surface position of stator seat, when stopping using this bearing, through making bearing antiport, consequently can make the atmospheric pressure of suspension intracavity portion reduce fast, consequently can realize first rotating hole and the equal synchronous sealing in second rotating hole position clearance, and sealing pressure is big, can avoid the inside ash that falls of bearing, avoids liquid environment pressure unstable simultaneously, the undulant problem of sealed effect.

While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. A magnetic axial bearing comprises a stator seat (1), a pushing disc (2) and a sealing block (3); the method is characterized in that: the stator seat (1) is designed into a cylindrical structure; the outer cambered surface of the stator seat (1) is fixedly connected with a fixing ring (11); an annular suspension cavity is formed in the stator seat (1); a first rotating hole and a second rotating hole are respectively formed in the upper end face and the lower end face of the stator seat (1), and the first rotating hole and the second rotating hole are used for communicating the suspension cavity with the outside of the magnetic axial bearing; a pushing disc (2) is arranged inside the suspension cavity; the upper end surface and the lower end surface of the pushing disc (2) are fixedly connected with a first rotating column (21) and a second rotating column (22) at the positions of the first rotating hole and the second rotating hole respectively; the upper surface and the lower surface of the pushing disc (2) are provided with first mounting holes which are uniformly distributed; the inner parts of the first installation parts are fixedly connected with first electromagnets; second mounting holes are formed in the inner surface of the stator seat (1) at the positions of the first mounting holes; the inner parts of the second mounting holes are fixedly connected with second electromagnets; the outer arc surface of the pushing disc (2) is provided with third mounting holes which are uniformly distributed; the inner parts of the third mounting holes are fixedly connected with third electromagnets; fourth mounting holes are formed in the inner arc surface of the stator seat (1) at the third mounting hole; the inner parts of the fourth mounting holes are fixedly connected with fourth electromagnets; the upper surface of the stator seat (1) is provided with uniformly distributed adjusting holes, and the adjusting holes are used for communicating the suspension cavity with the outside; a first pressure sheet (12) is arranged inside each adjusting hole; the side surface of one side of the first pressure plate (12) opposite to the pushing disc (2) is fixedly connected with a pushing rod (13); the lower surfaces of the push rods (13) are fixedly connected with cross rods; the lower surface of the cross rod is fixedly connected with first telescopic rods (14) close to the end surfaces of the two sides of the cross rod; the inner arc surface of the first mounting hole is provided with uniformly distributed sealing grooves; the sealing blocks (3) are connected inside the sealing grooves in a sliding manner; second telescopic rods (31) which are uniformly arranged are fixedly connected between the sealing block (3) and the groove bottom of the sealing groove; the outer arc surface of second rotation post (22) has linked firmly fan blade (15) of evenly arranging in second rotation hole position, because communicate between first telescopic link (14) and second telescopic link (31), consequently the compression of first telescopic link (14) can drive stretching out of second telescopic link (31), and second telescopic link (31) can drive sealed piece (3) and fold, realize sealedly.

2. A magnetic axial bearing according to claim 1, characterized in that: the inside in first rotation hole has linked firmly elastic sealing pad (32), and sealed piece (3) all are located the space that encloses between elastic sealing pad (32) and stator seat (1).

3. A magnetic axial bearing according to claim 2, characterized in that: the outer surface of the elastic sealing gasket (32) is fixedly connected with annular sealing rings (33) which are uniformly arranged in the vertical direction at the position of the facing surface of the first rotating column (21); the annular sealing ring (33) is made of soft rubber materials.

4. A magnetic axial bearing according to claim 3, characterized in that: a first rotating groove is formed in the outer arc surface of the first rotating column (21) at the position of the sealing block (3); the inside of the first rotating groove is rotatably connected with a first rotating ring (23).

5. A magnetic axial bearing according to claim 1, characterized in that: through-holes which are evenly distributed are formed in the upper and lower directions of the surface of the pushing disc (2), the through-holes and the first mounting holes are alternately distributed, and the through-holes are communicated with the upper side and the lower side of the pushing disc (2).

6. A magnetic axial bearing according to claim 1, characterized in that: a second pressure plate (34) and a third telescopic rod (35) are arranged in the stator seat (1); a sealing groove is also formed in the second rotating hole, and sealing blocks (3) are connected in the sealing groove in a sliding manner; a fourth telescopic rod (36) is arranged between the sealing block (3) and the groove bottom of the sealing groove, and elastic sealing gaskets (32) with annular sealing rings (33) are wrapped outside the sealing block (3) together; a second rotating groove is formed in the outer arc surface of the second rotating column (22) corresponding to the position of the sealing block (3); and a second rotating ring (37) is rotatably connected in each second rotating groove.