CN106969150A - Pole shoe back-trough formula circulating cooling magnetic fluid seal device - Google Patents
Pole shoe back-trough formula circulating cooling magnetic fluid seal device Download PDFInfo
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- CN106969150A CN106969150A CN201710205232.4A CN201710205232A CN106969150A CN 106969150 A CN106969150 A CN 106969150A CN 201710205232 A CN201710205232 A CN 201710205232A CN 106969150 A CN106969150 A CN 106969150A
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- 238000001816 cooling Methods 0.000 title claims abstract description 36
- 239000011553 magnetic fluid Substances 0.000 title claims 8
- 238000007789 sealing Methods 0.000 claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 239000002826 coolant Substances 0.000 claims abstract description 16
- 230000004323 axial length Effects 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims 14
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 239000012809 cooling fluid Substances 0.000 abstract description 2
- 238000011089 mechanical engineering Methods 0.000 abstract description 2
- 239000000110 cooling liquid Substances 0.000 description 12
- 238000002955 isolation Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
极靴背槽式循环冷却磁性液体密封装置，属于机械工程密封领域。解决了现有磁性液体密封装置在大直径、高转速、高环境温度工况下使用寿命短、密封性能下降的问题。所述装置中极靴的外圆表面开有流通冷却液的背槽，和背齿交替排列，能够增加极靴和冷却液的接触面积，提高冷却效率；背齿和极齿相对，背槽和齿槽相对，不影响磁回路的形成，保证密封装置的耐压能力；背槽和齿槽的径向距离d的距离为0.5～1mm，冷却效率高；导磁套开有圆孔，圆孔正对于极靴上的背槽；圆孔沿对角线分布在导磁套表面的矩形槽内，数量等于极靴上背槽的数量，这种设计不影响磁回路的形成，且能够保证每个极靴背槽内都流体冷却液，冷却效率高。
The utility model relates to a pole shoe back groove type circulating cooling magnetic liquid sealing device, which belongs to the field of mechanical engineering sealing. The invention solves the problems of short service life and reduced sealing performance of the existing magnetic liquid sealing device under the working conditions of large diameter, high rotating speed and high ambient temperature. The outer circular surface of the pole piece in the device is provided with back grooves for circulating cooling fluid, which are arranged alternately with the back teeth, which can increase the contact area between the pole piece and the coolant, and improve cooling efficiency; the back teeth are opposite to the pole teeth, and the back grooves and the The tooth grooves are opposite to each other, which does not affect the formation of the magnetic circuit, and ensures the pressure resistance of the sealing device; the radial distance d between the back groove and the tooth groove is 0.5-1mm, and the cooling efficiency is high; the magnetic sleeve has round holes, round holes It is facing the back slot on the pole piece; round holes are distributed diagonally in the rectangular slot on the surface of the magnetic sleeve, and the number is equal to the number of back slots on the pole piece. This design does not affect the formation of the magnetic circuit and can ensure that each There is liquid coolant in the back groove of each pole piece, which has high cooling efficiency.
Description
技术领域technical field
本发明属于机械工程密封领域，尤其适用于高环境温度下和高转速工况的磁性液体密封。The invention belongs to the field of mechanical engineering seals, and is especially suitable for magnetic liquid seals under high ambient temperature and high rotational speed working conditions.
背景技术Background technique
磁性液体密封因其零泄漏、长寿命、低摩擦等优点得到广泛应用。然而在实际应用中，磁性液体密封在大直径、高转速和高环境温度工况下，密封间隙内磁性液体往往因为温度过高而失效，永磁体在高温环境下性能也会下降甚至失效，这些因素严重影响磁性液体密封的使用寿命。在国际上，大直径、高转速、高环境温度工况下磁性液体密封的冷却也一直是一个难题。因此对磁性液体密封的冷却研究至关重要，直接影响着磁性液体密封装置的使用寿命。现有磁性液体密封装置如公开号为CN 104455463 A公开的嵌入导热片的冷却液式磁性液体密封装置，所述装置在每个齿槽内用密封胶粘接有导热片，在极靴上开有冷却液通道，该装置结构复杂，由于齿槽尺寸很小，对导热片的加工精度要求很高。又如授权公告号为CN 200943707Y公开的一种高温磁性液体密封水冷装置，所述装置通过套在极靴外圆的嵌入水套对磁性液体进行冷却，由于嵌入水套距离磁性液体较远，其冷却效果不好。又如公开号为CN 103574041 A公开的冷却槽与离心式组合的磁性液体旋转密封装置，所述装置在极靴上开有冷却槽，会影响磁回路，进而影响密封耐压能力。Magnetic liquid seals are widely used due to their advantages of zero leakage, long life, and low friction. However, in practical applications, under the conditions of large diameter, high speed and high ambient temperature, the magnetic liquid in the sealing gap often fails due to high temperature, and the performance of the permanent magnet will also decline or even fail in a high temperature environment. These Factors seriously affect the service life of the magnetic liquid seal. Internationally, the cooling of magnetic liquid seals under the conditions of large diameter, high speed, and high ambient temperature has always been a difficult problem. Therefore, the research on the cooling of the magnetic liquid seal is very important, which directly affects the service life of the magnetic liquid seal device. The existing magnetic liquid sealing device, such as the cooling fluid type magnetic liquid sealing device embedded in the heat conduction sheet disclosed by the publication number CN 104455463 A, said device has a heat conduction sheet bonded with a sealant in each alveolar, and is opened on the pole shoe. There is a coolant channel, and the structure of the device is complex. Due to the small size of the tooth groove, the processing accuracy of the heat conduction sheet is very high. Another example is a high-temperature magnetic liquid sealed water cooling device disclosed in CN 200943707Y. The device cools the magnetic liquid through an embedded water jacket placed on the outer circle of the pole piece. Since the embedded water jacket is far away from the magnetic liquid, its The cooling effect is not good. Another example is the magnetic liquid rotary sealing device with the combination of cooling groove and centrifugal type disclosed in the publication number CN 103574041 A. The device has a cooling groove on the pole shoe, which will affect the magnetic circuit and further affect the pressure resistance of the seal.
发明内容Contents of the invention
本发明需要解决的技术问题是，现有磁性液体旋转密封装置在大直径、高转速、高环境温度工况下，由于密封间隙发热量大、环境温度高易导致磁性液体密封寿命缩短甚至失效。因此提出一种极靴背槽式循环冷却磁性液体密封装置。The technical problem to be solved by the present invention is that, under the conditions of large diameter, high rotational speed and high ambient temperature, the existing magnetic liquid rotary sealing device may shorten the life of the magnetic liquid seal or even fail due to the large heat generation and high ambient temperature of the sealing gap. Therefore, a pole shoe back groove type circulating cooling magnetic liquid sealing device is proposed.
本发明解决其技术问题所采用的技术方案是：The technical solution adopted by the present invention to solve its technical problems is:
极靴背槽式循环冷却磁性液体密封装置,该装置包括：回转轴、左极靴、左极靴第一密封圈、外壳、左导磁套、左极靴第二密封圈、隔磁定位套筒、永磁体、右极靴第一密封圈、右导磁套、右端盖、右极靴第二密封圈、右极靴、磁性液体。Pole shoe back groove type circulating cooling magnetic liquid sealing device, the device includes: rotary shaft, left pole shoe, first sealing ring of left pole shoe, shell, left magnetic sleeve, second sealing ring of left pole shoe, magnetic isolation positioning sleeve Cylinder, permanent magnet, first sealing ring of right pole shoe, right magnetic sleeve, right end cover, second sealing ring of right pole shoe, right pole shoe, magnetic liquid.
构成该装置的各部分之间的连接：所述左极靴第一密封圈、左极靴第二密封圈安装在左极靴侧面外圆的凹槽内，构成带密封圈的左极靴；所述右极靴第一密封圈、右极靴第二密封圈安装在右极靴侧面外圆的凹槽内，构成带密封圈的右极靴。The connection between the parts constituting the device: the first sealing ring of the left pole shoe and the second sealing ring of the left pole shoe are installed in the groove on the outer circle of the side of the left pole shoe, forming a left pole shoe with a sealing ring; The first sealing ring of the right pole shoe and the second sealing ring of the right pole shoe are installed in the groove on the outer circle of the side of the right pole shoe, forming a right pole shoe with sealing rings.
左导磁套、所述带密封圈的左极靴、永磁体、隔磁定位套筒、右导磁套和带密封圈的右极靴依次放入外壳中；所述带密封圈的左极靴和左导磁套的左端面分别与外壳接触；旋转调节外壳的位置，使得左导磁套上开有最左侧的圆孔分别与外壳的A1、A2圆孔对齐；通过螺纹连接将右端盖与外壳固定，使各部件在外壳内轴向定位完成；所述带密封圈的左极靴、左导磁套、隔磁定位套筒、永磁体、右导磁套、带密封圈的右极靴、外壳和右端盖组成的密封件套上回转轴，向所述装置注入磁性液体，通过外壳法兰盘上的螺纹连接实现外壳的定位。The left magnetic sleeve, the left pole shoe with a sealing ring, the permanent magnet, the magnetic isolation positioning sleeve, the right magnetic sleeve and the right pole shoe with a sealing ring are put into the casing in sequence; the left pole shoe with a sealing ring The left end surfaces of the shoe and the left magnetic sleeve are respectively in contact with the housing; rotate and adjust the position of the housing so that the leftmost round holes on the left magnetic sleeve are aligned with the round holes A1 and A2 of the housing respectively; The cover is fixed to the casing, so that the axial positioning of each component in the casing is completed; the left pole shoe with sealing ring, the left magnetic sleeve, the magnetic isolation positioning sleeve, the permanent magnet, the right magnetic sleeve, and the right The seal composed of the pole piece, the shell and the right end cover is put on the rotary shaft, and the magnetic liquid is injected into the device, and the positioning of the shell is realized through the screw connection on the shell flange.
所述极靴背槽式循环冷却磁性液体密封装置工作时，通过外壳上的圆孔A1、B1通入低温冷却液，经左、右导磁套上的圆孔分别进入左、右极靴的背槽内对左极靴、右极靴和磁性液体进行冷却，冷却之后的液体通过外壳上的圆孔A2、B2将密封装置内的冷却液排出，从而实现循环冷却的目的。When the magnetic liquid sealing device of the pole shoe back groove type circulation cooling is working, the low-temperature coolant is passed through the round holes A1 and B1 on the shell, and enters the left and right pole shoes respectively through the round holes on the left and right magnetic sleeves. The left pole piece, the right pole piece and the magnetic liquid are cooled in the back groove, and the cooled liquid discharges the cooling liquid in the sealing device through the circular holes A2 and B2 on the casing, so as to achieve the purpose of circulating cooling.
本发明和已有技术相比所具有的有益效果：(1)所述左极靴、右极靴的外圆表面开有流通冷却液的背槽，背槽的数量为4～8个，和背齿交替排列，其中背槽轴向宽1～3mm，背齿轴向宽为1～2mm，这种设计能够有效增加极靴和冷却液的接触面积，提高冷却效率；(2)背齿和极齿相对，背齿和极齿轴向长度相等，背槽和齿槽相对，背槽和齿槽轴向长度相等，这样不会影响磁回路的形成，保证密封装置的耐压能力；(3)背槽和齿槽的的径向距离d的距离为0.5～1mm，这样能够使冷却液更接近磁性液体，快速带走磁性液体因相对运动产生的热量，提高冷却效率；(4)左导磁套开有4～8个向左极靴的背槽中添加冷却液的圆孔，孔径为1～2mm，其中每个圆孔正对于左极靴上的每个背槽，右导磁套开有4～8个向右极靴的背槽中添加冷却液的圆孔，孔径为1～2mm，其中每个圆孔正对于右极靴上的每个背槽；圆孔分布在导磁套表面的矩形槽内，矩形槽深2～3mm，且沿矩形槽的对角线分布，圆孔的数量等于极靴上背槽的数量，这种设计不影响磁回路的形成，且能够保证每个极靴背槽内都流体冷却液，冷却效率高；(5)永磁体的内、外径分别与左导磁套、右导磁套的内、外径相等，隔磁定位套筒的外径与左极靴、右极靴的外径相等，永磁体的轴向尺寸和隔磁定位套筒的轴向尺寸相同，这种设计能有效形成磁回路，并且实现极靴的定位；(6)外壳开有向密封装置中添加冷却液的圆孔A1、B1和从密封装置中流出冷却液的圆孔A2、B2，实现循环冷却；解决了大直径、高转速、高环境温度工况下的冷却难题。Compared with the prior art, the present invention has beneficial effects: (1) the outer circular surfaces of the left pole piece and the right pole piece are provided with back grooves for circulating cooling liquid, and the number of back grooves is 4 to 8, and The back teeth are arranged alternately, the axial width of the back groove is 1-3mm, and the axial width of the back teeth is 1-2mm. This design can effectively increase the contact area between the pole piece and the coolant, and improve the cooling efficiency; (2) the back teeth and The pole teeth are opposite, the back teeth and the pole teeth have the same axial length, the back groove and the tooth groove are opposite, the back groove and the tooth groove have the same axial length, so that the formation of the magnetic circuit will not be affected, and the pressure resistance of the sealing device is guaranteed; (3 ) The radial distance d between the back groove and the tooth groove is 0.5 ~ 1mm, which can make the cooling liquid closer to the magnetic liquid, quickly take away the heat generated by the relative motion of the magnetic liquid, and improve the cooling efficiency; (4) Left guide There are 4-8 round holes for adding coolant to the back groove of the left pole piece in the magnetic sleeve, the hole diameter is 1-2mm, and each round hole is facing each back groove on the left pole piece, and the right magnetic sleeve There are 4 to 8 round holes for adding coolant to the back groove of the right pole shoe, with a diameter of 1 to 2mm, and each hole is directly opposite to each back groove on the right pole shoe; the round holes are distributed in the magnetic conduction In the rectangular groove on the surface of the sleeve, the depth of the rectangular groove is 2 to 3mm, and it is distributed along the diagonal of the rectangular groove. The number of round holes is equal to the number of back grooves on the pole piece. This design does not affect the formation of the magnetic circuit and can ensure There is liquid coolant in the back groove of each pole piece, and the cooling efficiency is high; (5) The inner and outer diameters of the permanent magnet are respectively equal to the inner and outer diameters of the left magnetic sleeve and the right magnetic sleeve, and the magnetic isolation positioning sleeve The outer diameter is equal to that of the left pole piece and the right pole piece, and the axial dimension of the permanent magnet is the same as that of the magnetic isolation positioning sleeve. This design can effectively form a magnetic circuit and realize the positioning of the pole piece; ( 6) The shell is provided with round holes A1, B1 for adding cooling liquid to the sealing device and round holes A2, B2 for cooling liquid flowing out of the sealing device to realize circulating cooling; it solves the working conditions of large diameter, high speed and high ambient temperature The next cooling conundrum.
附图说明Description of drawings
图1极靴背槽式循环冷却磁性液体密封装置；Figure 1 Pole shoe back groove circulation cooling magnetic liquid sealing device;
图2导磁套上流通冷却液的圆孔分布示意图；Figure 2 is a schematic diagram of the distribution of circular holes for circulating coolant on the magnetic sleeve;
图3极靴各部分名称示意图；Figure 3 Schematic diagram of the names of each part of the pole shoe;
图4磁回路示意图。Figure 4. Schematic diagram of the magnetic circuit.
图1中：回转轴1、左极靴2、左极靴第一密封圈3、外壳4、左导磁套5、左极靴第二密封圈6、隔磁定位套筒7、永磁体8、右极靴第一密封圈9、右导磁套10、右端盖11、右极靴第二密封圈12、右极靴13、磁性液体14。In Fig. 1: rotary shaft 1, left pole shoe 2, first seal ring 3 of left pole shoe, shell 4, left magnetic sleeve 5, second seal ring 6 of left pole shoe, magnetic isolation positioning sleeve 7, permanent magnet 8 , the first seal ring 9 of the right pole shoe, the right magnetic sleeve 10, the right end cover 11, the second seal ring 12 of the right pole shoe, the right pole shoe 13, and the magnetic liquid 14.
具体实施方式detailed description
以附图为具体实施方式对本发明做进一步说明：The present invention will be further described with accompanying drawing as specific embodiment:
极靴背槽式循环冷却磁性液体密封装置如图1：回转轴1、左极靴2、左极靴第一密封圈3、外壳4、左导磁套5、左极靴第二密封圈6、隔磁定位套筒7、永磁体8、右极靴第一密封圈9、右导磁套10、右端盖11、右极靴第二密封圈12、右极靴13、磁性液体14。The magnetic liquid sealing device of the pole shoe back groove circulation cooling type is shown in Figure 1: the rotary shaft 1, the left pole shoe 2, the first sealing ring 3 of the left pole shoe, the shell 4, the left magnetic sleeve 5, the second sealing ring 6 of the left pole shoe , magnetic isolation positioning sleeve 7, permanent magnet 8, first seal ring 9 of right pole shoe, right magnetic sleeve 10, right end cover 11, second seal ring 12 of right pole shoe, right pole shoe 13, magnetic liquid 14.
构成该装置的各部分之间的连接：所述左极靴第一密封圈3、左极靴第二密封圈6安装在左极靴2侧面外圆的凹槽内，构成带密封圈的左极靴；所述右极靴第一密封圈9、右极靴第二密封圈12安装在右极靴13侧面外圆的凹槽内，构成带密封圈的右极靴。The connection between the parts constituting the device: the first sealing ring 3 of the left pole shoe and the second sealing ring 6 of the left pole shoe are installed in the groove of the outer circle of the side of the left pole shoe 2, forming a left pole shoe with a sealing ring. Pole shoe; the first seal ring 9 of the right pole shoe and the second seal ring 12 of the right pole shoe are installed in the groove of the outer circle of the side of the right pole shoe 13, forming a right pole shoe with a seal ring.
所述左导磁套5、带密封圈的左极靴、永磁体8、隔磁定位套筒7、右导磁套10和带密封圈的右极靴依次放入外壳4中；所述带密封圈的左极靴和左导磁套5的左端面分别与外壳4接触；旋转调节外壳4的位置，使得左导磁套5上开有的最左侧的圆孔分别与外壳4的A1、A2圆孔对齐；通过螺纹连接将右端盖11与外壳4固定，使各部件在外壳4内轴向定位完成；所述带密封圈的左极靴、左导磁套5、隔磁定位套筒7、永磁体8、右导磁套10、带密封圈的右极靴、外壳4和右端盖11组成的密封件套上回转轴1，向所述装置注入磁性液体14，通过外壳4法兰盘上的螺纹连接实现外壳4的定位。The left magnetic sleeve 5, the left pole shoe with a sealing ring, the permanent magnet 8, the magnetic isolation positioning sleeve 7, the right magnetic sleeve 10 and the right pole shoe with a sealing ring are sequentially put into the shell 4; The left pole piece of the sealing ring and the left end surface of the left magnetic sleeve 5 are respectively in contact with the housing 4; rotate and adjust the position of the housing 4 so that the leftmost round hole on the left magnetic sleeve 5 is in contact with A1 of the housing 4 respectively. , A2 round holes are aligned; the right end cover 11 and the shell 4 are fixed through threaded connection, so that the axial positioning of each component in the shell 4 is completed; the left pole shoe with a sealing ring, the left magnetic sleeve 5, and the magnetic isolation positioning sleeve The cylinder 7, the permanent magnet 8, the right magnetic sleeve 10, the right pole piece with a sealing ring, the casing 4 and the right end cover 11 are put on the rotary shaft 1, and the magnetic liquid 14 is injected into the device, and the casing 4 is used The screw connection on the blue plate realizes the positioning of the shell 4.
所述左极靴2、右极靴13的外圆表面开有流通冷却液的背槽，背槽的数量为4～8个，和背齿交替排列，其中背槽轴向宽1～3mm，背齿轴向宽为1～2mm，这种设计能够有效增加极靴和冷却液的接触面积，提高冷却效率；背齿和极齿相对，背齿和极齿轴向长度相等，背槽和齿槽相对，背槽和齿槽轴向长度相等，这样不会影响磁回路的形成，保证密封装置的耐压能力；背槽和齿槽的的径向距离d的距离为0.5～1mm，这样能够使冷却液更接近磁性液体14，快速带走磁性液体14因相对运动产生的热量，提高冷却效率；左导磁套5开有4～8个向左极靴2的背槽中添加冷却液的圆孔，孔径为1～2mm，其中每个圆孔正对于左极靴2上的每个背槽，右导磁套10开有4～8个向右极靴13的背槽中添加冷却液的圆孔，孔径为1～2mm，其中每个圆孔正对于右极靴13上的每个背槽；圆孔分布在导磁套表面的矩形槽内，矩形槽深2～3mm，且沿矩形槽的对角线分布，圆孔的数量等于极靴上背槽的数量，这种设计不影响磁回路的形成，且能够保证每个极靴背槽内都流体冷却液，冷却效率高；永磁体8的内、外径分别与左导磁套5、右导磁套10的内、外径相等，隔磁定位套筒7的外径与左极靴2、右极靴13的外径相等，永磁体8的轴向尺寸和隔磁定位套筒7的轴向尺寸相同，这种设计能有效形成磁回路，并且实现极靴的定位。外壳4开有向密封装置中添加冷却液的圆孔A1、B1和从密封装置中流出冷却液的圆孔A2、B2。The outer circular surfaces of the left pole shoe 2 and the right pole shoe 13 are provided with back grooves for circulating cooling liquid, the number of the back grooves is 4 to 8, and the back grooves are arranged alternately with the back teeth, wherein the axial width of the back grooves is 1 to 3 mm, The axial width of the back teeth is 1-2mm. This design can effectively increase the contact area between the pole shoe and the coolant, and improve the cooling efficiency; The grooves are opposite, and the axial lengths of the back groove and the tooth groove are equal, which will not affect the formation of the magnetic circuit and ensure the pressure resistance of the sealing device; the radial distance d between the back groove and the tooth groove is 0.5 ~ 1mm, which can Make the cooling liquid closer to the magnetic liquid 14, quickly take away the heat generated by the relative motion of the magnetic liquid 14, and improve the cooling efficiency; the left magnetic sleeve 5 has 4 to 8 holes for adding cooling liquid to the back groove of the left pole piece 2 Round holes with a diameter of 1 to 2 mm, each of which is facing each back groove on the left pole piece 2, and the right magnetic sleeve 10 has 4 to 8 holes to add coolant to the back groove of the right pole piece 13 round holes with a diameter of 1-2 mm, each of which is facing each back groove on the right pole shoe 13; the round holes are distributed in the rectangular grooves on the surface of the magnetic sleeve, the depth of the rectangular grooves is 2-3 mm, and along the The diagonal distribution of the rectangular slots, the number of round holes is equal to the number of back slots on the pole piece, this design does not affect the formation of the magnetic circuit, and can ensure fluid coolant in the back slot of each pole piece, high cooling efficiency; The inner and outer diameters of the permanent magnet 8 are respectively equal to the inner and outer diameters of the left magnetic sleeve 5 and the right magnetic sleeve 10, and the outer diameter of the magnetic isolation positioning sleeve 7 is the same as the outer diameter of the left pole shoe 2 and the right pole shoe 13. equal, the axial dimension of the permanent magnet 8 is the same as that of the magnetic isolation positioning sleeve 7, this design can effectively form a magnetic circuit and realize the positioning of the pole piece. The shell 4 is provided with circular holes A1, B1 for adding cooling liquid to the sealing device and circular holes A2, B2 for flowing cooling liquid from the sealing device.
所述极靴背槽式循环冷却磁性液体密封装置工作时，利用泵将低温冷却液从外壳4上A1、B1圆孔输入密封装置，对装置进行冷却后，冷却液从外壳4上A2、B2圆孔排出密封装置，实现循环冷却。When the magnetic liquid sealing device of pole shoe back groove circulation cooling is working, the low-temperature cooling liquid is input into the sealing device from the round holes A1 and B1 on the housing 4 by using a pump, and after the device is cooled, the cooling liquid flows from A2 and B2 on the housing 4 to the sealing device. The round hole discharges the sealing device to realize circulating cooling.
极靴、导磁套、回转轴1选用导磁性良好的材料，如电工纯铁；Pole shoes, magnetic sleeves, and rotary shaft 1 are made of materials with good magnetic conductivity, such as electrical pure iron;
永磁体8选用钕铁硼；Permanent magnet 8 selects neodymium iron boron for use;
磁性液体14的种类根据使用环境和密封介质的不同选择不同基载液的磁性液体。The type of magnetic liquid 14 is selected from different base carrier liquids according to the use environment and sealing medium.
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Application publication date: 20170721 |