WO2023147793A2 - 一种磁液双悬浮轴承 - Google Patents

一种磁液双悬浮轴承 Download PDF

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Publication number
WO2023147793A2
WO2023147793A2 PCT/CN2023/096718 CN2023096718W WO2023147793A2 WO 2023147793 A2 WO2023147793 A2 WO 2023147793A2 CN 2023096718 W CN2023096718 W CN 2023096718W WO 2023147793 A2 WO2023147793 A2 WO 2023147793A2
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WIPO (PCT)
Prior art keywords
magnetic
radial
axial
stator
magnetic poles
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PCT/CN2023/096718
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English (en)
French (fr)
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WO2023147793A3 (zh
Inventor
陈丽文
崔冰艳
龙海洋
马喆
尚林
吴位赢
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华北理工大学
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Application filed by 华北理工大学 filed Critical 华北理工大学
Priority to PCT/CN2023/096718 priority Critical patent/WO2023147793A2/zh
Publication of WO2023147793A2 publication Critical patent/WO2023147793A2/zh
Priority to ZA2023/08023A priority patent/ZA202308023B/en
Publication of WO2023147793A3 publication Critical patent/WO2023147793A3/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means

Definitions

  • the invention relates to the technical field of bearings, in particular to a magnetic fluid double suspension bearing.
  • the magnetic fluid double suspension bearing adopts the dual support of electromagnetic force and static pressure support force. It is a new type of non-mechanical contact bearing. It has the advantages of no friction, no wear, large bearing capacity, high motion precision, and long service life. General attention and wide application.
  • the object of the present invention is to provide a magnetic fluid double suspension bearing to solve the above-mentioned problems existing in the prior art.
  • the axial length of the liquid double suspension system can be applied to a narrow space and reduce the processing and assembly error of the bearing.
  • the present invention provides the following scheme:
  • the invention provides a magnetic-fluid double-suspension bearing, which includes a main shaft, a stator and a rotor arranged on the main shaft; the stator is provided with a hollow cylindrical housing, and the housing is provided with radial magnetic poles and a magnetic sleeve , the inner surface of the magnetic sleeve is in transition fit with the main shaft, the radial magnetic poles are arranged at equal intervals along the inner circumference of the stator, and the radial magnetic poles extend along the radial direction of the stator, and the radial magnetic poles One end of the magnetic pole is connected to the stator, and there is a gap between the other end and the outer surface of the magnetic sleeve; the radial magnetic poles are arranged in pairs, and the radial magnetic poles arranged in pairs are connected to the magnetic sleeve.
  • a magnetic flux circuit is formed, a radial coil is sleeved on each radial magnetic pole, and a radial oil inlet hole is arranged on each radial magnetic pole along the radial direction of the stator, and the radial inlet hole
  • One end of the oil hole runs through the stator, and the other end runs through the end of the radial magnetic pole close to the magnetic sleeve, and the end of the radial magnetic pole close to the magnetic sleeve is provided with a groove, and each The opening of the groove is provided with a non-magnetic porous medium gasket corresponding to it and covering it;
  • Axial magnetic poles are also fixed on the stator along the axial direction, and the axial magnetic poles are arranged in pairs, and each of the axial magnetic poles is covered with an axial coil;
  • the rotor is arranged on the main shaft in the radial direction , the two sides of the rotor are respectively provided with a first permanent magnet and a second permanent magnet, the axial magnetic poles arranged in pairs are respectively located on both sides of the rotor, and the axial magnetic poles on both sides are respectively connected to the
  • a gap is provided between the first permanent magnet and the second permanent magnet, and the axial magnetic poles on both sides respectively form a magnetic flux circuit with the first permanent magnet and the second permanent magnet;
  • the first permanent magnet The outer diameter sides of the magnet and the second permanent magnet are provided with a carbon fiber cladding reinforcement layer;
  • the stator is also provided with an axial oil inlet hole and an axial winding hole in the axial direction, and the stator is also provided with an oil outlet and a radial winding hole in the radial direction, wherein the axial oil inlet The hole, the axial winding hole, the oil port and the radial winding hole are all through holes.
  • the 8 radial magnetic poles are arranged in a NSSNNSSN manner.
  • the gap between the end of the radial magnetic pole and the outer surface of the magnetic sleeve is 10 ⁇ m-30 ⁇ m, and the axial magnetic poles on both sides are respectively connected to the first permanent magnet and the second permanent magnet.
  • the gap between the surfaces of the permanent magnets is 10 ⁇ m-30 ⁇ m.
  • the housing is also provided with a housing oil outlet.
  • an end cover is connected to the end of the stator.
  • the inner side of the end cover is provided with a skeleton sealing cavity, and a skeleton sealing ring is installed in the skeleton sealing cavity, and a protrusion is also provided on the inner ring of the end cover, and the protrusion is used to seal the skeleton sealing ring.
  • Axial positioning; the end cover is also provided with a second ring groove, and a second sealing ring is installed in the second ring groove; the outer side of the end cover is connected with a cover.
  • both sides of the housing are provided with first sealing rings.
  • a retaining ring is provided at both ends of the main shaft.
  • the invention combines the radial magnetic fluid double suspension bearing and the axial magnetic fluid double suspension bearing into one body, which greatly shortens the axial length of the entire magnetic fluid double suspension system, is applicable to narrow spaces, and reduces the processing of bearings Assembly error.
  • Fig. 1 is a perspective view of a magnetic fluid double suspension bearing in an embodiment of the present invention
  • Fig. 2 is a cross-sectional view of a magnetic fluid double suspension bearing in an embodiment of the present invention
  • Fig. 3 is a three-dimensional schematic diagram of a housing in an embodiment of the present invention.
  • Fig. 4 is the front view of the stator in the embodiment of the present invention.
  • Fig. 5 is a sectional view of the stator in an embodiment of the present invention.
  • Fig. 6 is a perspective view of a stator in an embodiment of the present invention.
  • Fig. 7 is the front view of the end cap in the embodiment of the present invention.
  • Fig. 8 is a sectional view along A-A direction of Fig. 7;
  • Fig. 9 is a schematic structural view of the rotor and the main shaft in the embodiment of the present invention.
  • Fig. 10 is a front view of the cover in the embodiment of the present invention.
  • Fig. 11 is a sectional view taken along line B-B in Fig. 10 .
  • this embodiment provides a magnetic fluid double suspension bearing, including a main shaft 4, a stator 2 and a rotor 30 arranged on the main shaft 4; wherein, two stators 2 are provided, and two stators 2
  • a hollow cylindrical housing 1 is arranged between the outer edges of the stator 2, and radial magnetic poles 18 and a magnetic sleeve 12 are provided in the stator 2 along the radial direction.
  • the inner circumference of the stator 2 is arranged at equal intervals, one end of the radial magnetic pole 18 is connected to the stator 2, and the other end has a gap with the outer surface of the magnetic sleeve 12; the radial magnetic poles 18 on the stator 2 on both sides are arranged in pairs, and the diameters arranged in pairs NS pole to pole 18 with
  • the magnetic sleeve 12 forms a magnetic flux circuit, and each radial magnetic pole 18 is respectively covered with a radial coil 33, and each radial magnetic pole 18 is provided with a radial oil inlet hole 15, and the radial oil inlet hole 15 is A through hole arranged in the radial direction, one end of the through hole is arranged outside the housing 1, and the other end is arranged on the bottom of the groove at the end of the radial magnetic pole 18, and each groove opening is provided with a corresponding and covered non-magnetic porous media gasket.
  • the axial direction of the stator 2 is also fixed with axial magnetic poles 14, the axial magnetic poles 14 on both sides are set in pairs, the axial magnetic poles 14 are covered with axial coils 9, and the axial magnetic poles 14 on both sides are connected with the first permanent magnet 13 respectively.
  • the second permanent magnet 35 forms a magnetic flux circuit, and a countersunk screw hole 22 is formed between the first permanent magnet 13, the rotor 30, and the second permanent magnet 35, and the fixed connection is realized by fixing screws installed in the countersunk screw holes;
  • There are two through holes in the axial direction of the stator 2 one is an axial oil inlet hole 16, which is connected to the elbow joint 5, and the other is an axial winding hole 19, and the stator 2 has two through holes in the radial direction.
  • One is the oil outlet 36, which is connected to the elbow joint 5, and the other is the radial winding hole 11; the outer diameter sides of the first permanent magnet 13 and the second permanent magnet 35 are provided with a carbon fiber cladding reinforcement layer.
  • the gap between the ends of the radial magnetic poles 18 and the outer surface of the magnetic sleeve 12, and the gaps between the axial magnetic poles 14 on both sides and the surfaces of the first permanent magnet 13 and the second permanent magnet 35 are equal. 10 ⁇ m-30 ⁇ m.
  • FIG. 2 and FIG. 4 there are eight radial magnetic poles 18 on each side of the stator 2 , and the eight radial magnetic poles are arranged in a NSSNNSSN manner.
  • the casing 1 is provided with a casing oil outlet 27 .
  • the end of the stator 2 is provided with a stator threaded hole 23, and the end cover 3 is correspondingly provided with an end cover through hole 34, and the screw 7 passes through the end cover through hole 34 and is threaded.
  • the screw 7 is preferably a hexagon socket head screw.
  • a skeleton sealing cavity 21 is provided inside the end cover 3, and a skeleton sealing ring 25 is installed in the skeleton sealing cavity 21, and the inner ring of the end cap 3 is also provided with
  • the protrusion plays an axial positioning role for the skeleton sealing ring 25;
  • a second ring groove 20 is also provided on the end cover 3 for installing the second sealing ring 24;
  • an end cover threaded hole 31 is provided on the outside of the end cover 3 , the cover 6 is correspondingly provided with a cover Through the through hole 32, the screw passes through the through hole 32 of the cover and the threaded hole 31 of the end cover to realize the connection between the end cover 3 and the cover 6 and play the role of axial fixing.
  • FIG. 2 and FIG. 3 four fixed through holes 17 with a diameter of 12 mm are provided on the side wall of the housing 1 in the axial direction, and the stators 2 on both sides pass through the fixed through holes through bolts 8 17 is connected with the housing 1; both sides of the housing 1 are provided with a first ring groove 26, and the first sealing ring 10 is installed and fixed in the first ring groove 26 to realize the sealing connection between the housing 1 and the stators 2 on both sides.
  • both the first sealing ring 10 and the second sealing ring 24 are O-rings, and the first ring groove 26 and the second ring groove 20 correspond to O-ring grooves.
  • a retaining ring groove 28 is provided at both ends of the main shaft 4 , and a retaining ring 29 is fixed in the retaining ring groove 28 .
  • the inner diameter of the housing 1 is 218mm, the outer diameter is 286mm, and the thickness is 70mm; the inner diameter of the first sealing ring 10 is 224mm, and the thickness is 5.3mm; the inner diameter of the end cap 3 is 55mm, and the outer
  • the ring diameter is 160mm; the diameter of the main shaft 4 is 42mm, and the diameter of the rotor 30 on it is 212mm, and the main shaft 4 is also provided with shoulders with a diameter of 110mm and 58mm, respectively for the first permanent magnet 13, the second permanent magnet 35 and the guide
  • the magnetic sleeve 12 plays the role of radial and axial positioning.
  • the radial coil on the radial magnetic pole is energized, and each pair of adjacent NS magnetic poles and the magnetic sleeve form a magnetic flux loop to act on the main shaft to make the main shaft suspend.
  • the magnetic flux on each radial magnetic pole The radial oil inlet hole starts to enter oil, which plays the role of support, lubrication and cooling;
  • the axial coil of the stator is energized and forms a magnetic flux circuit with the first permanent magnet and the second permanent magnet respectively, so that the rotor on the main shaft is suspended
  • the axial oil inlet hole starts to enter oil, which plays the role of supporting, lubricating and cooling.
  • the overflowing oil flows out through the oil outlet hole on the stator and the housing oil outlet on the housing.

Abstract

本发明公开了一种磁液双悬浮轴承，涉及轴承技术领域，包括主轴、定子及转子，定子的壳体内设有径向磁极、导磁套，径向磁极成对设置，每个径向磁极均设有径向线圈、径向进油孔，径向磁极的端部设置有不导磁多孔介质垫片；定子的轴向还固定有轴向磁极，轴向磁极成对设置，轴向磁极上套有轴向线圈，转子两侧的轴向磁极分别与第一永磁体和第二永磁体形成磁通回路，永磁体的外径侧设置有碳纤维包覆增强层；定子轴向设有轴向进油孔、轴向绕线孔，径向设有出油口、径向绕线孔。本发明将径向磁液双悬浮轴承与轴向磁液双悬浮轴承结合成一体，极大地缩短了整个磁液双悬浮系统的轴向长度，可适用于狭小的空间，且减少了轴承的加工装配误差。

Description

一种磁液双悬浮轴承 技术领域
本发明涉及轴承技术领域，特别是涉及一种磁液双悬浮轴承。
背景技术
磁液双悬浮轴承采用电磁力和静压支承力双重支承，是一种新型的非机械接触的轴承，具有无摩擦、无磨损、承载能力大、运动精度高、使用寿命长等优点，因此得到普遍重视和广泛应用。
一般情况下，一个径向磁液双悬浮轴承和一对轴向磁液双悬浮轴承配合使用时，所需的空间大，对加工装配精度要求高，上述要求对磁液双悬浮轴承的普及使用造成了不利的影响。
发明内容
本发明的目的是提供一种磁液双悬浮轴承，以解决上述现有技术存在的问题，将径向磁液双悬浮轴承与轴向磁液双悬浮轴承结合成一体，极大地缩短了整个磁液双悬浮系统的轴向长度，可适用于狭小的空间，且减少了轴承的加工装配误差。
为实现上述目的，本发明提供了如下方案：
本发明提供一种磁液双悬浮轴承，包括主轴及设置在所述主轴上的定子和转子；所述定子设有空心圆柱状的壳体，所述壳体内设有径向磁极和导磁套，所述导磁套内表面与所述主轴过渡配合，所述径向磁极沿所述定子的内圆周等间隔设置，且所述径向磁极沿所述定子的径向延伸，所述径向磁极的一端与所述定子连接，另一端与所述导磁套的外表面之间留有间隙；所述径向磁极成对设置，成对设置的所述径向磁极与所述导磁套形成磁通回路，每个所述径向磁极上均套有一个径向线圈，且每个径向磁极上均沿所述定子的径向设有一个径向进油孔，所述径向进油孔的一端贯穿所述定子，另一端贯穿所述径向磁极靠近所述导磁套的一端，且所述径向磁极靠近所述导磁套的一端端部设置有凹槽，每个所述凹槽的开口上设有与其对应并将其覆盖的不导磁多孔介质垫片；
所述定子上沿轴向还固定有轴向磁极，所述轴向磁极成对设置，每个所述轴向磁极上均套有轴向线圈；所述转子沿径向设置于所述主轴上，所述转子的两侧分别设置有第一永磁体和第二永磁体，成对设置的所述轴向磁极分别位于所述转子的两侧，两侧的所述轴向磁极分别与所述第一永磁体和所述第二永磁体之间设有间隙，两侧的所述轴向磁极分别与所述第一永磁体和所述第二永磁体形成磁通回路；所述第一永磁体和所述第二永磁体的外径侧设置有碳纤维包覆增强层；
所述定子上还沿轴向设置有轴向进油孔和轴向绕线孔，所述定子上还沿径向设置有出油口和径向绕线孔，其中，所述轴向进油孔、所述轴向绕线孔、所述油口和所述径向绕线孔均为通孔。
优选的，所述径向磁极设有8个，8个所述径向磁极按照NSSNNSSN方式排列。
优选的，所述径向磁极的端头与所述导磁套的外表面之间的间隙为10μm-30μm，两侧的所述轴向磁极分别与所述第一永磁体和所述第二永磁体表面之间的间隙为10μm-30μm。
优选的，所述壳体上还设有壳体出油口。
优选的，所述定子的端部连接有端盖。
优选的，所述端盖的内侧设有骨架密封腔，所述骨架密封腔内安装骨架密封圈，所述端盖内圈处还设置有突起，所述突起用于对所述骨架密封圈进行轴向定位；所述端盖上还设有第二圈槽，所述第二圈槽内安装第二密封圈；所述端盖外侧连接有封盖。
优选的，所述壳体的两侧均设有第一密封圈。
优选的，所述主轴的两端各设有一挡圈。
本发明相对于现有技术取得了以下技术效果：
本发明将径向磁液双悬浮轴承与轴向磁液双悬浮轴承结合成一体，极大地缩短了整个磁液双悬浮系统的轴向长度，可适用于狭小的空间，且减少了轴承的加工装配误差。
附图说明
图1是本发明实施例中磁液双悬浮轴承的立体图；
图2是本发明实施例中磁液双悬浮轴承的剖视图；
图3是本发明实施例中壳体的立体示意图；
图4是本发明实施例中定子的主视图；
图5是本发明实施例中定子的剖视图；
图6是本发明实施例中定子的立体图；
图7是本发明实施例中端盖的主视图；
图8是图7的A-A向剖视图；
图9是本发明实施例中转子与主轴的结构示意图；
图10是本发明实施例中封盖的主视图；
图11是图10的B-B向剖视图。
图中：1、壳体，2、定子，3、端盖，4、主轴，5、弯管接头，6、封盖，7、螺钉，8、螺栓，9、轴向线圈，10、第一密封圈，11、径向绕线孔，12、导磁套，13、第一永磁体，14、轴向磁极，15、径向进油孔，16、轴向进油孔，17、固定通孔，18、径向磁极，19、轴向绕线孔，20、第二圈槽，21、骨架密封腔，22、沉头螺钉孔，23、定子螺纹孔，24、第二密封圈，25、骨架密封圈，26、第一圈槽，27、壳体出油口，28、挡圈槽，29、挡圈，30、转子，31、端盖螺纹孔，32、封盖通孔，33、径向线圈，34、端盖通孔，35、第二永磁体，36、出油孔。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
如图1-图11所示，本实施例提供一种磁液双悬浮轴承，包括主轴4及设置在主轴4上的定子2、转子30；其中，定子2设置有两个，两个定子2的外缘之间设置有空心圆柱状的壳体1，定子2内沿径向设有径向磁极18、导磁套12，导磁套12内表面与主轴4过渡配合，径向磁极18沿定子2内圆周等间隔设置，径向磁极18的一端与定子2连接，另一端与导磁套12外表面有间隙；两侧定子2上的径向磁极18成对设置，成对设置的径向磁极18的NS磁极与 导磁套12形成磁通回路，每个径向磁极18上各套有一个径向线圈33，每个径向磁极18上均设有一个径向进油孔15，径向进油孔15为沿径向设置的通孔，该通孔一端设在壳体1外，另一端设在径向磁极18端部的凹槽底上，在每个凹槽开口上设有与其对应并将其覆盖的不导磁多孔介质垫片。
定子2的轴向还固定有轴向磁极14，两侧的轴向磁极14成对设置，轴向磁极14上套有轴向线圈9，两侧的轴向磁极14分别与第一永磁体13和第二永磁体35表面有间隙，第一永磁体13与第二永磁体35的另一表面与主轴4上的转子30相接触，两侧的轴向磁极14分别与第一永磁体13和第二永磁体35形成磁通回路，第一永磁体13、转子30、第二永磁体35三者之间形成有沉头螺钉孔22，通过固定螺钉安装于沉头螺钉孔内实现固定连接；在定子2的轴向设有2个通孔，一个为轴向进油孔16，连接弯管接头5，另一个为轴向绕线孔19，定子2径向还开有2个通孔，一个为出油口36，连接弯管接头5，另一个为径向绕线孔11；第一永磁体13和第二永磁体35的外径侧设置有碳纤维包覆增强层。
在本实施例中，径向磁极18的端头与导磁套12外表面间的间隙，以及两侧的轴向磁极14分别与第一永磁体13和第二永磁体35表面间的间隙均为10μm-30μm。
在本实施例中，如图2和图4所示，每侧的定子2上的径向磁极18均设有8个，8个径向磁极按照NSSNNSSN方式排列。
在本实施例中，如图3所示，壳体1上设有壳体出油口27。
在本实施例中，如图5所示，定子2的端部设有定子螺纹孔23，端盖3上对应设有端盖通孔34，通过螺钉7穿过端盖通孔34并螺纹连接于定子螺纹孔23内，实现端盖3与定子2连接；其中，螺钉7优选为内六角花形圆柱头螺钉。
在本实施例中，如图2、图7、图8所示，端盖3内侧设有骨架密封腔21，骨架密封腔21内安装骨架密封圈25，端盖3的内圈处还设置有突起，对骨架密封圈25起到轴向定位作用；端盖3上还设有第二圈槽20，用以安装第二密封圈24；进一步地，端盖3外侧设有端盖螺纹孔31，封盖6对应设置有封盖 通孔32，通过螺钉穿过封盖通孔32和端盖螺纹孔31，实现端盖3与封盖6相连接，起到轴向固定的作用。
在本实施例中，如图2、图3所示，壳体1的侧壁上沿轴向设有4个直径为12mm的固定通孔17，两侧定子2通过螺栓8穿过固定通孔17与壳体1相连接；壳体1的两侧均设有第一圈槽26，第一圈槽26内安装固定第一密封圈10，实现壳体1与两侧定子2的密封连接。
其中，第一密封圈10和第二密封圈24均为O型圈，第一圈槽26和第二圈槽20对应为O型圈槽。
在本实施例中，如图2、图9所示，主轴4的两端各设有一道挡圈槽28，挡圈槽28内固定挡圈29。
在本实施例中，壳体1的内圈直径为218mm，外圈直径为286mm，厚度为70mm；第一密封圈10内径为224mm，厚度为5.3mm；端盖3内圈直径为55mm，外圈直径为160mm；主轴4直径为42mm，其上的转子30直径为212mm，主轴4上还设有直径为110mm和58mm的轴肩，分别对第一永磁体13、第二永磁体35和导磁套12起到径向和轴向定位作用。
本实施例中磁液双悬浮轴承的工作原理如下：
磁液双悬浮轴承工作时，径向磁极上的径向线圈通电，每对相邻的NS磁极与导磁套形成磁通回路作用于主轴上，使主轴悬浮，同时每个径向磁极上的径向进油孔开始进油，起到支承、润滑、冷却的作用；定子轴向的轴向线圈通电并与第一永磁体和第二永磁体分别形成磁通回路，使主轴上的转子悬浮，同时轴向进油孔开始进油，起到支承、润滑、冷却的作用，同时溢出的油通过定子上的出油孔和壳体上的壳体出油口流出。
本发明中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想，不应理解为对本发明的限制。

Claims (10)

  1. 一种磁液双悬浮轴承，包括主轴及设置在所述主轴上的定子和转子；其特征在于：所述定子设有空心圆柱状的壳体，所述壳体内设有径向磁极和导磁套，所述导磁套内表面与所述主轴过渡配合，所述径向磁极沿所述定子的内圆周等间隔设置，且所述径向磁极沿所述定子的径向延伸，所述径向磁极的一端与所述定子连接，另一端与所述导磁套的外表面之间留有间隙；所述径向磁极成对设置，成对设置的所述径向磁极与所述导磁套形成磁通回路，每个所述径向磁极上均套有一个径向线圈，且每个径向磁极上均沿所述定子的径向设有一个径向进油孔，所述径向进油孔的一端贯穿所述定子，另一端贯穿所述径向磁极靠近所述导磁套的一端，且所述径向磁极靠近所述导磁套的一端端部设置有凹槽，每个所述凹槽的开口上设有与其对应并将其覆盖的不导磁多孔介质垫片；
    所述定子上沿轴向还固定有轴向磁极，所述轴向磁极成对设置，每个所述轴向磁极上均套有轴向线圈；所述转子沿径向设置于所述主轴上，所述转子的两侧分别设置有第一永磁体和第二永磁体，成对设置的所述轴向磁极分别位于所述转子的两侧，两侧的所述轴向磁极分别与所述第一永磁体和所述第二永磁体之间设有间隙，两侧的所述轴向磁极分别与所述第一永磁体和所述第二永磁体形成磁通回路；所述第一永磁体和所述第二永磁体的外径侧设置有碳纤维包覆增强层；
    所述定子上还沿轴向设置有轴向进油孔和轴向绕线孔，所述定子上还沿径向设置有出油口和径向绕线孔，其中，所述轴向进油孔、所述轴向绕线孔、所述油口和所述径向绕线孔均为通孔。
  2. 根据权利要求1所述的磁液双悬浮轴承，其特征在于：所述径向磁极设有8个，8个所述径向磁极按照NSSNNSSN方式排列。
  3. 根据权利要求1所述的磁液双悬浮轴承，其特征在于：所述径向磁极的端头与所述导磁套的外表面之间的间隙为10μm-30μm，两侧的所述轴向磁极分别与所述第一永磁体和所述第二永磁体表面之间的间隙为10μm-30μm。
  4. 根据权利要求1所述的磁液双悬浮轴承，其特征在于：所述壳体上还设有壳体出油口。
  5. 根据权利要求1所述的磁液双悬浮轴承，其特征在于：所述定子的端部连接有端盖。
  6. 根据权利要求5所述的磁液双悬浮轴承，其特征在于：所述端盖的内侧设有骨架密封腔，所述骨架密封腔内安装骨架密封圈，所述端盖内圈处还设置有突起，所述突起用于对所述骨架密封圈进行轴向定位；所述端盖上还设有第二圈槽，所述第二圈槽内安装第二密封圈；所述端盖外侧连接有封盖。
  7. 根据权利要求1所述的磁液双悬浮轴承，其特征在于：所述壳体的两侧与定子相连接，且所述壳体的两侧均设有第一圈槽，第一圈槽内安装第一密封圈。
  8. 根据权利要求1所述的磁液双悬浮轴承，其特征在于：所述主轴的两端各设有一道挡圈槽，所述挡圈槽内固定挡圈。
  9. 根据权利要求1所述的磁液双悬浮轴承，其特征在于：所述轴向进油孔和所述出油口均连接有弯管接头。
  10. 根据权利要求1所述的磁液双悬浮轴承，其特征在于：所述径向线圈和所述轴向线圈均为漆包线圈。
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