CN109854752B - Magnetic liquid rotary seal device suitable for high speed working conditions - Google Patents

Abstract

The invention discloses a magnetic liquid rotary sealing device suitable for a high-rotation-speed working condition, which comprises: the magnetic liquid rotary sealing structure is suitable for sealing magnetic liquid under a high-rotation-speed working condition, and can solve the problems that the magnetic liquid is overlarge under the high-rotation-speed working condition, so that the pressure resistance of a sealing element is reduced or even the sealing is invalid. The device relies on axial magnetic liquid seal assembly to play the sealed effect, under high rotational speed operating mode, the liquid film damage condition that magnetic liquid appears because of centrifugal force is too big can be prevented to the pole shoe structure of new design to current magnetic liquid seal structure's pressure-proof ability under high rotational speed not enough problem has effectively been solved.

Description

Magnetic liquid rotary seal device suitable for high speed working conditions

Technical field

The invention relates to the technical field of mechanical engineering seals, and in particular to a magnetic liquid rotary seal device suitable for high-speed working conditions.

Background technique

Magnetic liquid is a new type of nanofunctional material. Magnetic liquid seals are widely used because of their advantages such as zero leakage, long life, and low friction. However, at high speeds, the increased centrifugal force on the magnetic liquid can easily lead to failure of the magnetic liquid seal. Internationally, magnetic liquid sealing under high-speed working conditions has always been a problem.

The typical structure of the existing magnetic liquid rotary seal device is mostly similar to a magnetic liquid seal device with a poleless shoe. However, when the device is used under high-speed conditions, the centrifugal force on the magnetic liquid is too large, which often leads to seal failure. In addition, related technologies also include: (1) A device that combines centrifugal sealing and magnetic liquid sealing, but this device has a complex structure and is too sensitive to the thermal elongation of the shaft. (2) On the basis of the typical sealing structure, a magnetic liquid sealing device based on the centrifugal sealing principle is added.

However, in the magnetic liquid rotary seal structure in the related art, under high-speed working conditions, the magnetic liquid is subject to excessive centrifugal force, which reduces the pressure resistance of the seal and even causes sealing failure, which needs to be solved.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art, at least to a certain extent.

For this reason, the purpose of the present invention is to propose a magnetic liquid rotary sealing device suitable for high-speed working conditions, which effectively solves the problem of insufficient pressure resistance of the existing magnetic liquid sealing structure at high speeds.

In order to achieve the above object, an embodiment of the present invention proposes a magnetic liquid rotating seal device suitable for high-speed working conditions, including: a first pole shoe assembly, the first pole shoe assembly includes a first left pole with a sealing ring shoes, the first right pole shoe with two sealing rings, the first right shaft sleeve pole shoe with sealing rings and the first middle filled pole shoe, wherein the first middle filled pole shoe, with two The first right pole shoe with sealing ring, the first right shaft sleeve pole shoe with sealing ring and the first left pole shoe with sealing ring, and the gap formed by the first pole shoe assembly is sealed by magnetic liquid; the second pole The second pole shoe assembly includes a second left pole shoe with a sealing ring, a second right pole shoe with two sealing rings, a second right shaft sleeve pole shoe with a sealing ring, and a second left pole shoe. sleeve, the second middle-filled pole shoe and the second right pole shoe sleeve, in which the second left pole shoe sleeve, the second left pole shoe with a sealing ring, the second left shaft sleeve pole are put in order shoes, the second middle-filled pole shoe, the second right pole shoe with two sealing rings, the second right shaft sleeve pole shoe with sealing rings, and the second right pole shoe sleeve, and respectively Use threaded connections to fix the second left pole shoe and the second left pole shoe with a sealing ring, the second right pole shoe with two sealing rings and the second right pole shoe, and pass The magnetic liquid seals the gap formed by the second pole shoe assembly; an adjusting gasket and an end cover with a sealing ring are placed in sequence and connected using threads .

The magnetic liquid rotary sealing device suitable for high-speed working conditions according to the embodiment of the present invention relies on the axial magnetic liquid seal assembly to play a sealing role. Under high-speed working conditions, the newly designed pole shoe structure can prevent the magnetic liquid from being caused by excessive centrifugal force. It greatly reduces the damage to the liquid film and weakens the impact of increased centrifugal force on the magnetic liquid film at the sealing gap, thus effectively solving the problem of insufficient pressure resistance of the existing magnetic liquid sealing structure at high rotational speeds.

In addition, the magnetic liquid rotary sealing device suitable for high-speed working conditions according to the above embodiments of the present invention may also have the following additional technical features:

Further, in one embodiment of the present invention, it also includes: a rotary shaft, a permanent magnet, a shell, a sleeve, a retaining ring and a locking nut, wherein the permanent magnet is installed in the shell, and the sleeve The barrel is sleeved on the rotary shaft, and the elastic retaining ring and the locking nut are installed on the shaft in sequence.

Further, in one embodiment of the present invention, the first left pole shoe with a sealing ring includes a first left pole shoe sealing ring and a first left pole shoe, wherein the first left pole shoe seal The ring is installed in the groove in the first left pole shoe to form the first left pole shoe with a sealing ring; the first right pole shoe with two sealing rings includes a first left shaft sleeve pole shoe, a first Right pole shoe sealing ring one, first right pole shoe sealing ring two and first right pole shoe, wherein the first left shaft sleeve pole shoe is installed on one side of the rotary shaft, and the first right pole shoe sealing ring 1. The second sealing ring of the first right pole shoe is installed in the first groove and the second groove of the first right pole shoe respectively, forming the first right pole shoe with two sealing rings; the first right pole shoe The shaft sleeve pole piece includes a first shaft sleeve sealing ring and a first right shaft sleeve pole piece, wherein the first shaft sleeve sealing ring is installed in the groove of the first right shaft sleeve pole piece to form the belt sealing ring The first right shaft sets the pole shoe.

Further, in one embodiment of the present invention, the first pole shoe assembly further includes: a first housing sealing ring, the first housing sealing ring is installed in the first groove of the housing; a first left The pole shoe cover and the first left pole shoe are connected to the first left pole shoe through threads and placed on the leftmost side of the housing; the first pole shoe assembly also It includes: a first housing sealing ring, which is installed in the first groove of the housing; a first left pole shoe cover and a first left pole shoe, and the first left pole shoe is threaded The sleeve is connected with the first left pole shoe and placed on the far left side of the housing.

Further, in one embodiment of the present invention, the second left pole shoe with a sealing ring includes a second left pole shoe sealing ring and a second left pole shoe, wherein the second left pole shoe seal The ring is installed in the groove in the second left pole shoe to form the second left pole shoe with a sealing ring; the second right pole shoe with two sealing rings includes a second right pole shoe sealing ring 1. The second right pole shoe sealing ring 2 and the second right pole shoe, wherein the second right pole shoe sealing ring 1 and the second right pole shoe sealing ring 2 are respectively installed on the second right pole shoe The second right pole shoe with two sealing rings is formed in the first groove and the second groove; the second right shaft sleeve pole shoe includes a second inter-shaft sleeve sealing ring and a second right shaft sleeve pole shoe, wherein the second inter-shaft sleeve sealing ring is installed in the groove of the second right shaft sleeve pole shoe to form the second right shaft sleeve pole shoe with a sealing ring.

Further, in one embodiment of the present invention, wherein the first left pole shoe cover, the second left pole shoe cover, the first left pole shoe, the second left pole shoe, the The first middle filled pole shoe and the second middle filled pole shoe form a first arc surface; the first right pole shoe cover, the second right pole shoe cover, the first right pole shoe, the third right pole shoe cover The two right pole shoes, the first middle filled pole shoe and the second middle filled pole shoe form a second arc surface; the tip of the first left shaft sleeve pole piece and the second left shaft sleeve pole shoe are There is a preset gap between the tip and the first arc surface, and between the tip of the first right shaft sleeve pole piece and the second right shaft sleeve pole shoe and the second arc surface. , and the gaps are filled with the magnetic liquid.

Further, in one embodiment of the present invention, the preset gap is 0.1 mm.

Further, in one embodiment of the present invention, the first left pole shoe cover, the second left pole shoe cover, the first left pole shoe, the second left pole shoe, the first The middle filled pole shoe, the second middle filled pole shoe, the first right pole shoe cover, the second right pole shoe cover, the first right pole shoe, the second right pole shoe, the The first left shaft sleeve pole piece and the second left shaft sleeve pole piece are both made of magnetically conductive materials.

Further, in one embodiment of the present invention, the permanent magnet is neodymium iron boron.

Further, in one embodiment of the present invention, the housing is made of non-magnetic conductive material.

Further, in one embodiment of the present invention, it also includes: a second housing sealing ring, which is installed into the second groove of the housing to form an end cover with a sealing ring.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

Figure 1 is a schematic structural diagram of a magnetic liquid rotary seal device suitable for high-speed working conditions according to an embodiment of the present invention;

Figure 2 is an enlarged view of part A filled with magnetic liquid in Figure 1 according to an embodiment of the present invention;

FIG. 3 is an enlarged view of part A in FIG. 1 that is not filled with magnetic liquid according to an embodiment of the present invention.

Explanation of reference symbols:

Magnetic liquid rotary sealing device 100 suitable for high-speed working conditions, rotary shaft 1, first left shaft sleeve pole shoe 2-1, first right shaft sleeve pole shoe 3-1, first left pole shoe sleeve 4-1, The first middle filled pole shoe 5-1, the first left pole shoe sealing ring 6-1, the first right pole shoe sealing ring one 7-1, the first right pole shoe sealing ring two 8-1, the first right pole shoe sealing ring Set 9-1, first housing sealing ring 10-1, first left pole shoe 11-1, first right pole shoe 12-1, second left shaft sleeve pole shoe 2-2, second right shaft sleeve pole shoe 3-2, second left pole shoe cover 4-2, second middle filled pole shoe 5-2, second left pole shoe sealing ring 6-2, second right pole shoe sealing ring 7-2, second right pole shoe sealing ring 1 Pole shoe sealing ring two 8-2, second right pole shoe cover 9-2, second housing sealing ring 10-2, second left pole shoe 11-2, second right pole shoe 12-2, permanent magnet 13, Adjusting gasket 14, end cover 15, locking nut 16, elastic retaining ring 17, first shaft sleeve sealing ring 18-1, magnetic liquid 19, sleeve 20, second shaft sleeve sealing ring 18-2, housing 21.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and are not to be construed as limiting the present invention.

The magnetic liquid rotary sealing device suitable for high-speed working conditions proposed according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a schematic structural diagram of a magnetic liquid rotary seal device suitable for high-speed working conditions according to an embodiment of the present invention.

As shown in Figure 1, the magnetic liquid rotary sealing device 100 suitable for high-speed working conditions includes: a first pole shoe assembly, a second pole shoe assembly, an adjustment gasket, and an end cover with a sealing ring.

Wherein, the first pole shoe assembly includes a first left pole shoe with a sealing ring, a first right pole shoe with two sealing rings, a first right shaft sleeve pole shoe with a sealing ring and a first middle filled pole shoe, wherein , put in the first middle filled pole shoe, the first right pole shoe with two sealing rings, the first right shaft sleeve pole shoe with sealing ring and the first left pole shoe with sealing ring, and seal them with magnetic liquid The gap formed by the first pole shoe assembly. The second pole shoe assembly includes a second left pole shoe with a sealing ring, a second right pole shoe with two sealing rings, a second right shaft sleeve pole shoe with a sealing ring, a second left pole shoe sleeve, and a second middle part Fill the pole shoe and the second right pole shoe, in which the second left pole shoe, the second left pole shoe with a sealing ring, the second left shaft sleeve pole shoe, the second middle filled pole shoe, and the two The second right pole shoe with a sealing ring, the second right shaft sleeve pole shoe with a sealing ring, and the second right pole shoe sleeve, and the second left pole shoe sleeve and the second left pole with a sealing ring are respectively fixed with threads. shoe, a second right pole shoe with two sealing rings and a second right pole shoe cover, and the gap formed by the second pole shoe assembly is sealed by magnetic liquid. Adjust the gasket and the end cap with sealing ring. Place the adjusting gasket and the end cap with sealing ring in sequence and connect them with threads. The device of the embodiment of the present invention can weaken the influence of the increase of centrifugal force on the magnetic liquid film at the sealing gap under high-speed working conditions, thereby effectively solving the problem of insufficient pressure resistance of the existing magnetic liquid sealing structure under high-speed conditions. question.

Specifically, as shown in Figure 1, the magnetic liquid sealing device 100 suitable for high rotational speeds includes: a rotary shaft 1, a first left shaft sleeve pole shoe 2-1, a first right shaft sleeve pole shoe 3-1, and a first right shaft sleeve pole shoe 3-1. One left pole shoe cover 4-1, first middle filled pole shoe 5-1, first left pole shoe sealing ring 6-1, first right pole shoe sealing ring one 7-1, first right pole shoe sealing ring two 8-1, first right pole shoe 9-1, first housing sealing ring 10-1, first left pole shoe 11-1, first right pole shoe 12-1, second left shaft sleeve pole shoe 2- 2. The second right pole shoe 3-2, the second left pole shoe 4-2, the second middle filled pole shoe 5-2, the second left pole shoe seal 6-2, the second right pole shoe seal Ring one 7-2, second right pole shoe sealing ring two 8-2, second right pole shoe cover 9-2, second housing sealing ring 10-2, second left pole shoe 11-2, second right pole Shoe 12-2, permanent magnet 13, adjusting washer 14, end cover 15, locking nut 16, elastic retaining ring 17, sealing ring between the first shaft sleeve 18-1, magnetic liquid 19, sleeve 20, second shaft sleeve Seal ring 18-2 and housing 21.

The connection of each part of the magnetic liquid rotary sealing device 100 suitable for high-speed working conditions will be described in detail below with reference to the accompanying drawings. Among them, Figure 2 is an enlarged view of part A in Figure 1 (filled with magnetic liquid), and Figure 3 is an enlarged view of part A in Figure 1 (not filled with magnetic liquid).

As shown in Figure 1, the first housing sealing ring 10-1 is installed in the first groove of the housing 21, where the first groove is the leftmost groove in the figure. The first left pole shoe sealing ring 6-1 is installed in the groove in the first left pole shoe 11-1, forming a first left pole shoe with a sealing ring. The first left pole shoe cover 4-1 is connected to the first left pole shoe 11-1 through a threaded connection, and placed on the leftmost side of the housing 21. The first left shaft sleeve pole shoe 2-1 is installed on the leftmost side of the rotary shaft 1. The first right pole shoe sealing ring 7-1 and the first right pole shoe sealing ring 8-1 are respectively installed on the first right pole. The first groove and the second groove of the shoe 12-1 form a first right pole shoe with two sealing rings, wherein the first groove and the second groove of the first right pole shoe 12-1 are They are two grooves on the left and right of the first right pole shoe 12-1 as shown in the figure. The first inter-shaft sleeve sealing ring 18-1 is installed in the groove of the first right shaft sleeve pole piece 3-1, forming the first right shaft sleeve pole piece with a sealing ring. In order, put in the first middle filled pole shoe 5-1, the first right pole shoe with two sealing rings, the first right shaft sleeve pole shoe with sealing ring, and the first right shaft sleeve pole shoe with sealing ring. Use The first right pole shoe 12-1 and the first right pole shoe cover 9-1 are threaded and fixed. The magnetic liquid 19 is injected into the two sealing gaps formed on the left side of Figure 1.

The permanent magnet 13 is installed in the housing 21, and the sleeve 20 is placed on the rotary shaft 1. The second left pole shoe sealing ring 6-2 is installed in the groove in the second left pole shoe 11-2, forming a second left pole shoe with a sealing ring. The second right pole shoe sealing ring 7-2 and the second right pole shoe sealing ring 8-2 are respectively installed in the first groove and the second groove of the second right pole shoe 12-2, forming a belt with two The second right pole shoe of the sealing ring, wherein the first groove and the second groove of the second right pole shoe 12-2 are the left and right grooves of the second right pole shoe 12-2. The second inter-shaft sleeve sealing ring 18-2 is installed in the groove of the second right shaft sleeve pole piece 3-2, forming a second right shaft sleeve pole piece with a sealing ring. In order, put in the second left pole shoe 4-2, the second left pole shoe with sealing ring, the second left shaft sleeve pole shoe 2-2, the second middle filled pole shoe 5-2, and the second left pole shoe with two sealing rings. The second right pole shoe, the second right shaft sleeve pole shoe with sealing ring, the second right pole shoe sleeve 9-2, and use threaded connection to fix the second left pole shoe sleeve 4-2 and the second left pole shoe with sealing ring. pole shoe; and use threaded connection to fix the second right pole shoe with two sealing rings and the second right pole shoe sleeve 9-2. . In addition, the magnetic liquid 19 is injected into the two sealing gaps formed on the right side of Figure 1;

The elastic retaining ring 17 and the locking nut 16 are installed on the shaft in sequence; the second housing sealing ring 10-2 is installed into the groove of the housing 21 to form an end cover with a sealing ring; the adjusting gasket 14 and the sealing ring are placed in sequence The end cap of the ring is connected with threads to complete the positioning and installation of the magnetic liquid sealing device.

Further, in one embodiment of the present invention, the first left pole shoe cover, the second left pole shoe cover, the first left pole shoe, the second left pole shoe, the first middle filled pole shoe and the second middle filled pole The boots constitute the first arc surface; the first right pole shoe cover, the second right pole shoe cover, the first right pole shoe, the second right pole shoe, the first middle filled pole shoe and the second middle filled pole shoe form the second arc. surface; between the tip of the first left shaft sleeve pole shoe and the second left shaft sleeve pole shoe and the first arc surface, as well as between the tip of the first right shaft sleeve pole shoe and the second right shaft sleeve pole shoe and Preset gaps are left between the second arc surfaces, and the gaps are filled with magnetic liquid. The preset gap may be 0.1 mm. Of course, those skilled in the art can also set the width of the gap according to actual conditions, which is not specifically limited here.

It can be understood that in the above embodiment, all the left pole shoe covers, all the left pole shoes, and all the middle filled pole shoes form an arc surface, and all the right pole shoe covers, all the right pole shoes, and all the middle filled pole shoes form an arc surface. , the minimum distance between the tips of all left shaft sleeve pole pieces and all right shaft sleeve pole pieces and the arc surface is 0.1mm, and they are filled with magnetic liquid 19. When the rotary shaft 1 rotates at high speed, the magnetic liquid 19 is still restricted within the arc surface under the action of huge centrifugal force, so the pressure resistance capability will not be significantly reduced, and the sealing effect is good.

It should be noted that all the left pole boot, right pole boot, left pole boot, middle filled pole boot, right pole boot, left pole boot and right pole boot can be made of materials with good magnetic permeability , such as 2Cr13, electrical pure iron, etc. The permanent magnet 13 may use neodymium iron boron or the like. The shell 21 can be made of non-magnetic material, such as 316L stainless steel. The type of magnetic liquid 18 depends on the use environment and sealing medium, and magnetic liquids based on different carrier liquids are selected, and are not specifically limited here.

According to the magnetic liquid rotary sealing device suitable for high-speed working conditions proposed by the embodiment of the present invention, the axial magnetic liquid seal assembly plays a sealing role. Under high-speed working conditions, the newly designed pole shoe structure can prevent the magnetic liquid from being The liquid film damage caused by excessive centrifugal force solves the problem of insufficient pressure resistance of the existing magnetic liquid sealing structure at high speeds. When the rotary shaft rotates at high speed, the magnetic liquid is still damaged by the huge centrifugal force. It is limited to the arc surface and fills the sealing gap. The pressure resistance capacity will not be significantly reduced and the sealing effect is good.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present invention. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present invention. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (7)

1. A magnetic liquid rotary seal device suitable for high rotational speed operating mode, characterized in that includes:

a first pole shoe assembly comprising a first left pole shoe with a sealing ring, a first right pole shoe with two sealing rings, a first right sleeve pole shoe with a sealing ring, and a first middle-filled pole shoe, wherein the first middle-filled pole shoe, the first right pole shoe with two sealing rings, the first right sleeve pole shoe with a sealing ring, and the first left pole shoe with a sealing ring are sequentially placed and a gap formed by the first pole shoe assembly is sealed by a magnetic liquid;

the second pole shoe assembly comprises a second left pole shoe with sealing rings, a second right pole shoe with two sealing rings, a second right shaft sleeve pole shoe with sealing rings, a second left pole shoe sleeve, a second middle filling pole shoe and a second right pole shoe sleeve, wherein the second left pole shoe sleeve, the second left pole shoe with sealing rings, the second left shaft sleeve pole shoe, the second middle filling pole shoe, the second right pole shoe with two sealing rings, the second right shaft sleeve pole shoe with sealing rings and the second right pole shoe sleeve are sequentially placed in the second left pole shoe sleeve, the second left pole shoe with sealing rings, the second right pole shoe with two sealing rings and the second right pole shoe sleeve, and gaps formed by the second pole shoe assembly are sealed through magnetic liquid; and

the adjusting gasket and the end cover with the sealing ring are sequentially placed in the adjusting gasket and the end cover with the sealing ring and are connected through threads;

further comprises:

the device comprises a rotating shaft, a permanent magnet, a shell, a sleeve, a circlip and a locking nut, wherein the permanent magnet is arranged in the shell, the sleeve is sleeved on the rotating shaft, and the circlip and the locking nut are sequentially arranged on the shaft;

the first left pole shoe sleeve, the second left pole shoe sleeve, the first left pole shoe, the second left pole shoe, the first middle filling pole shoe, the second middle filling pole shoe, the first right pole shoe sleeve, the second right pole shoe sleeve, the first right pole shoe, the second right pole shoe, the first left shaft sleeve pole shoe and the second left shaft sleeve pole shoe are all made of magnetic conductive materials;

the permanent magnet is neodymium iron boron, and the shell is made of non-magnetic conductive materials.

2. The rotary magnetic fluid seal apparatus for high speed operation of claim 1, wherein,

the first left pole shoe with the sealing ring comprises a first left pole shoe sealing ring and a first left pole shoe, wherein the first left pole shoe sealing ring is arranged in a groove in the first left pole shoe to form the first left pole shoe with the sealing ring;

the first right pole shoe with the two sealing rings comprises a first left shaft sleeve pole shoe, a first right pole shoe sealing ring I, a first right pole shoe sealing ring II and a first right pole shoe, wherein the first left shaft sleeve pole shoe is arranged on one side of the rotary shaft, and the first right pole shoe sealing ring I and the first right pole shoe sealing ring II are respectively arranged in a first groove and a second groove of the first right pole shoe to form the first right pole shoe with the two sealing rings;

the first right shaft sleeve pole shoe comprises a first shaft sleeve sealing ring and a first right shaft sleeve pole shoe, wherein the first shaft sleeve sealing ring is arranged in a groove of the first right shaft sleeve pole shoe to form the first right shaft sleeve pole shoe with the sealing ring.

3. The magnetic liquid rotary seal device adapted for high speed operation of claim 2, wherein the first pole shoe assembly further comprises:

a first housing seal ring mounted in a first groove of the housing;

the first left pole shoe sleeve is connected with the first left pole shoe through threads and is placed at the leftmost side of the shell;

the first right pole shoe sleeve is fixedly connected with the first right pole shoe through threads.

4. The rotary magnetic fluid seal apparatus for high rotational speed operation according to claim 3, wherein,

the second left pole shoe with the sealing ring comprises a second left pole shoe sealing ring and a second left pole shoe, wherein the second left pole shoe sealing ring is arranged in a groove in the second left pole shoe to form the second left pole shoe with the sealing ring;

the second right pole shoe with the two sealing rings comprises a second right pole shoe sealing ring I, a second right pole shoe sealing ring II and a second right pole shoe, wherein the second right pole shoe sealing ring I and the second right pole shoe sealing ring II are respectively arranged in a first groove and a second groove of the second right pole shoe to form the second right pole shoe with the two sealing rings;

the second right shaft sleeve pole shoe comprises a second shaft sleeve sealing ring and a second right shaft sleeve pole shoe, wherein the second shaft sleeve sealing ring is arranged in a groove of the second right shaft sleeve pole shoe to form the second right shaft sleeve pole shoe with the sealing ring.

5. The rotary magnetic fluid seal apparatus for high speed operation of claim 4, wherein,

the first left pole shoe sleeve, the second left pole shoe sleeve, the first left pole shoe, the second left pole shoe, the first middle filling pole shoe and the second middle filling pole shoe form a first cambered surface;

the first right pole shoe sleeve, the second right pole shoe sleeve, the first right pole shoe, the second right pole shoe, the first middle filling pole shoe and the second middle filling pole shoe form a second cambered surface;

preset gaps are reserved between the tip of the first left shaft sleeve pole shoe and the tip of the second left shaft sleeve pole shoe and the first cambered surface, and between the tip of the first right shaft sleeve pole shoe and the tip of the second right shaft sleeve pole shoe and the second cambered surface, and the gaps are filled with the magnetic liquid.

6. The magnetic liquid rotary seal device adapted for high rotational speed operation of claim 5, wherein the predetermined gap is 0.1mm.

7. The magnetic liquid rotary seal device adapted for high rotational speed operation of claim 1, further comprising:

and the second housing sealing ring is arranged in the second groove of the housing to form an end cover with the sealing ring.