CN215806306U

CN215806306U - Magnetic fluid sealing structure

Info

Publication number: CN215806306U
Application number: CN202022956759.0U
Authority: CN
Inventors: 尹利
Original assignee: Shanghai Yichan Vacuum Technology Co ltd
Current assignee: Shanghai Yichan Vacuum Technology Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2022-02-11
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a magnetic fluid sealing structure, which relates to the technical field of magnetic fluid sealing and comprises a structure body, wherein the structure body comprises a shell, a water-cooling pipe interface, a water channel, a cover plate, a first magnetic isolation ring, first magnets, a first sealing groove, magnets, a front bearing, a rear bearing, a water blocking pipe, retainer ring clamp springs, a magnetic liquid groove and a shaft are arranged in the shell, wherein the front bearing is sleeved on one side of the shaft, the retainer ring clamp springs are sleeved on two sides of the front bearing, a first fluorine rubber water seal is arranged on the shaft on one side of one retainer ring clamp spring, and a first magnetic isolation ring, two first magnets, a second magnetic isolation ring, a rear bearing and a cover plate are sequentially arranged on the shaft on the other side of the other retainer ring clamp spring. The utility model ensures the coaxiality of the shaft and the sealing component during installation, avoids leakage caused by eccentricity, and injects the magnetic grease to ensure that the magnetic grease is firmly adsorbed between the inner hole of the first magnet and the gap of the shaft, thereby achieving sealing and stronger sealing property.

Description

Magnetic fluid sealing structure

Technical Field

The utility model relates to the technical field of magnetic fluid sealing, in particular to a magnetic fluid sealing structure.

Background

In recent years, vacuum equipment at home and abroad is rapidly developed. The magnetic fluid seal is widely applied to a plurality of rotary dynamic sealing devices, such as the seal of vacuum equipment, such as a monocrystalline silicon furnace, a vacuum brazing furnace, a vacuum smelting furnace, chemical vapor deposition, ion plating, liquid crystal regeneration and the like, and the seal of high-temperature and high-pressure equipment and equipment with higher requirements on environment. Thereby improving the product quality and obtaining good economic benefit.

The magnetic fluid sealing technology is developed on the basis of magnetic fluid, and when the magnetic fluid is injected into the gap of a magnetic field, the magnetic fluid can fill the whole gap to form a liquid O-shaped sealing ring. The magnetic fluid sealing device has the function of transmitting rotary motion into a sealed container, and is commonly used for vacuum sealing.

In the application process of the magnetic fluid technology, the outer surface of the magnetic conduction shaft or the magnetic conduction sleeve contacts with the inner surface of the sealing assembly to cause sealing failure, and the phenomenon is easy to occur in a structure without a bearing in the magnetic current sealing element; generally, when the magnetic fluid sealing element is installed, the coaxiality of the rotating shaft and the sealing assembly is not aligned, so that eccentricity is caused, and contact is generated; the magnetic force lines of the sealing gap are short-circuited, and a magnetic fluid film is damaged, so that leakage is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a magnetic fluid sealing structure.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a magnetic fluid sealing structure comprises a structure body, wherein the structure body comprises a shell, a water cooling pipe interface, a water channel, a cover plate, a first magnetic isolation ring, a first magnet, a first sealing groove, magnets, a front bearing, a rear bearing, a water blocking pipe, a retaining ring clamping spring, a magnetic fluid groove and a shaft are arranged in the shell, wherein the front bearing is sleeved on one side of the shaft, the retaining ring clamping spring is sleeved on two sides of the front bearing, one retaining ring clamping spring is installed on the shaft on one side of the retaining ring clamping spring in a sleeved mode, the other retaining ring clamping spring is installed on the shaft on the other side of the retaining ring clamping spring in a sleeved mode, the first magnetic isolation ring, the second magnetic isolation ring, the rear bearing and the cover plate are sequentially installed on the shaft on the other side of the retaining ring clamping spring, a magnetic isolation sleeve is arranged in the middle of the two first magnets, the magnets are provided with magnets through the magnetic isolation sleeve, the two magnets are arranged on the shaft opposite to the first magnets, the water blocking pipe is installed on the outer side of the two first magnets, the water cooling pipe interface is arranged at the top of the inner side of the shell, the water channel is arranged between the water cooling pipe interface and the top of the water retaining pipe, and the bottom of the water channel is abutted to the top of the magnetism isolating sleeve.

Preferably, the structure body further comprises a second sealing groove, a screw hole and a shell flange hole, the second sealing groove is arranged on one side of the outer portion of the shell, and the shell flange hole is arranged below the shell.

Preferably, the keyway is provided with two, and sets up respectively in the both sides of axle, one side the middle part of keyway is provided with the screw hole, the epaxial retainer ring groove that is provided with of screw hole outside.

Preferably, the magnet is one of a button-like structure or a ring-like structure.

Preferably, the first seal groove sets up two sets ofly, two sets of first seal groove all sets up two the outside of first magnet, the internally mounted of first seal groove has the second fluorine glue water seal.

Preferably, the housing comprises a flange structure and a barrel.

Compared with the prior art, the utility model has the beneficial effects that:

1. installing a first retainer ring snap spring on one side of a front bearing on the shaft, then sleeving the front bearing, and installing another retainer ring snap spring, wherein in the installation process, the retainer ring snap springs on two sides of the bearing are required to be tightly close to the front bearing, so that the front bearing is limited by the two retainer ring snap springs, and the stability between the front bearing and the shaft can be enhanced;

2. the middle part of two first magnets is provided with magnetism isolating sleeve, two first magnets install magnet through magnetism isolating sleeve, two first magnet are relative epaxial be provided with the design of magnetic fluid groove, in the installation, at epaxial first magnetism isolating ring of installation, the inside of first magnetism isolating ring is near the outline of axle, install two first magnets and install the magnet at middle part with magnetism isolating sleeve after that, can make two first magnet holes keep coaxial, install the sealing washer during use, install magnet through two first magnets in the middle of, can produce the magnetic field return circuit to the axle, guarantee axle and seal assembly's axiality, avoid off-centre to arouse the leakage, pour into magnetic grease, make magnetic grease firmly adsorb between the gap of first magnet hole and axle, thereby reach sealedly, the leakproofness is stronger.

Drawings

Fig. 1 is a schematic structural diagram of a magnetic fluid sealing structure according to the present invention;

fig. 2 is an enlarged view of a portion a of a magnetic fluid sealing structure according to the present invention.

In the figure: the water-cooled water purifier comprises a shell 1, a water-cooled water.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

Referring to fig. 1-2, a magnetic fluid seal structure, including the structure body, the structure body includes casing 1, casing 1 includes flange structure 101 and stack shell 102, wherein, casing 1 adopts the material of stainless iron magnetic conduction, the inside of casing 1 is provided with water-cooling tube interface 2, water course 3, apron 4, first magnetism ring 6, first magnet 7, first seal groove 8, magnet 9, front bearing 18, rear bearing 10, manger plate pipe 11, retaining ring jump ring 12, magnetism liquid groove 13, axle 14, wherein, axle 14 adopts the material of 3cr13 or 2cr13 stainless iron magnetic conduction, axle 14 one side cover is equipped with front bearing 18, the both sides of front bearing 18 all are equipped with retaining ring jump ring 12, one install first fluorine glue water seal 19 on the axle 14 of retaining ring 12 one side, can play fine dustproof effect, another install first magnetism ring 6, another in proper order on the axle 14 of retaining ring 12 opposite side, Two first magnets 7, second magnetism isolating rings, a rear bearing 10 and a cover plate 4, wherein the first sealing groove 8 is provided with two groups, two groups of first sealing grooves 8 further comprise 801, 802 and 803, two groups of first sealing grooves 8 are arranged on the outer sides of the two first magnets 7, a second fluorine glue water seal is arranged inside the first sealing groove 8 for preventing dust, a magnetism isolating sleeve is arranged in the middle of the two first magnets 7, the two first magnets 7 are provided with magnets 9 through the magnetism isolating sleeve, the magnets 9 are in a button-shaped structure or a ring-shaped structure, magnetic liquid grooves 13 are arranged on shafts 14 opposite to the two first magnets 7, water blocking pipes 11 are arranged on the outer sides of the two first magnets 7, the water cooling pipe connector 2 is arranged on the inner top of the shell 1, the water channel 3 is arranged between the water cooling pipe connector 2 and the top of the water blocking pipes 11, the bottom of the water channel 3 is abutted against the top of the magnetism isolating sleeve;

in this embodiment, the front bearing 18 and the rear bearing 10 are mounted on the shaft 14, and can support the entire shaft to maintain coaxial motion in the swivel; the front bearing 18 and the rear bearing 10 are deep groove bearings, and the brand model is one of NSK, NTN, NACHI, IKO or FAG;

specifically, the structure body 1 further comprises a second sealing groove 5, screw holes 17 and shell flange holes 20, the second sealing groove 5 is arranged on one side of the outer portion of the shell 1, the shell flange holes 20 are arranged below the shell 1, the number of the key slots 15 is two, the two key slots are respectively arranged on two sides of the shaft 14, the screw holes 17 are arranged in the middle of the key slot 15 on one side, and the shaft 14 outside the screw holes 17 is provided with a retainer ring groove 16;

the water cooling pipe interface 2 is established according to the problems of tool equipment used by a client, if the temperature exceeds 70 ℃ to 400-;

the shaft is the core of the magnetic fluid, the concentricity is necessarily designed according to the requirement during processing, the diameter length of the excircle and the installation size of each part meet the precision requirement, and the service life of the shaft is ensured;

through installing magnet in the middle of two first magnets 7, can produce the magnetic field return circuit to axle 14, pour into magnetic grease into, make magnetic grease firmly adsorb between the gap of first magnet 7 hole and axle 14, produce the seal structure that liquid never abraded to reach sealedly.

The working principle is as follows: during production, the size and the internal structure of the shell are produced according to requirements, when the magnetic fluid bearing is installed, the components of the magnetic fluid are installed in the shell 1 according to design structure requirements, a first retaining ring clamp spring 12 on one side of a front bearing 18 is installed on a shaft 14 in a threaded mode, then the front bearing 18 is sleeved, another retaining ring clamp spring 12 is installed, in the installation process, the retaining ring clamp springs 12 on two sides of the front bearing 18 are required to be tightly close to the front bearing 18, the front bearing 18 is limited by the two retaining ring clamp springs 12, the stability between the front bearing 18 and the shaft 14 is enhanced, the front bearing 18 and the retaining ring clamp spring 12 cannot move in a string mode, then a first magnetism isolating ring 6 is installed on the shaft 14, the inner portion of the first magnetism isolating ring 6 is tightly close to the outer contour of the shaft 14, then two first magnets 7 are installed, and a magnet 9 in the middle portion is installed through a magnetism isolating sleeve, inner holes of the two first magnets 7 are kept coaxial, when in use, the sealing ring is arranged;

in the process of installation, magnetic grease fluid is injected into the magnetic liquid groove 13 on the outer side of the shaft, the two first magnets 7 provided with the magnets 9 are quickly pushed to the positions of the magnetic liquid groove 13 on the shaft 14, then the second magnetic isolation ring and the rear bearing 10 are installed, all the components are installed on the shaft 14 and then are installed in the shell 1, the cover plate 4 is installed, the cover plate 4 is provided with wrench holes, and the locking cover plate 4 is installed through the wrench holes to be compressed.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A magnetic fluid sealing structure comprises a structural body, the structural body comprises a shell (1), and the magnetic fluid sealing structure is characterized in that a water-cooling pipe connector (2), a water channel (3), a cover plate (4), a first magnetism isolating ring (6), a first magnet (7), a first sealing groove (8), a magnet (9), a front bearing (18), a rear bearing (10), a water retaining pipe (11), a retainer ring clamp spring (12), a magnetic fluid groove (13) and a shaft (14) are arranged in the shell (1), wherein,

the improved water cooling device is characterized in that a front bearing (18) is sleeved on one side of the shaft (14), check ring clamping springs (12) are sleeved on two sides of the front bearing (18), one check ring clamping spring (12) is installed on the shaft (14) on one side of the check ring clamping spring (12), a first magnetism isolating ring (6), two first magnets (7), a second magnetism isolating ring, a rear bearing (10) and a cover plate (4) are sequentially installed on the shaft (14) on the other side of the check ring clamping spring (12), magnetism isolating sleeves are arranged in the middle of the two first magnets (7), magnets (9) are installed on the two first magnets (7) through the magnetism isolating sleeves, magnetism liquid grooves (13) are arranged on the shafts (14) opposite to the two first magnets (7), water blocking pipes (11) are installed on the outer sides of the two first magnets (7), and the water cooling pipe interfaces (2) are arranged at the top of the inner side of the shell (1), the water channel (3) is arranged between the water cooling pipe interface (2) and the top of the water retaining pipe (11), and the bottom of the water channel (3) is abutted to the top of the magnetism isolating sleeve.

2. The magnetic fluid sealing structure according to claim 1, wherein the structural body further comprises a second sealing groove (5), a screw hole (17) and an outer shell flange hole (20), the second sealing groove (5) is arranged on one side of the outer part of the shell (1), and the outer shell flange hole (20) is arranged below the shell (1).

3. The magnetic fluid sealing structure according to claim 1, characterized in that the shaft (14) is provided with key slots (15) at two sides, a screw hole (17) is arranged in the middle of the key slot (15) at one side, and a retainer ring groove (16) is arranged on the shaft (14) outside the screw hole (17).

4. A magnetic fluid sealing structure according to claim 2, characterized in that the magnet (9) is one of a button-like structure or a ring-like structure.

5. The magnetic fluid sealing structure according to claim 1, wherein the first sealing grooves (8) are provided in two groups, the two groups of first sealing grooves (8) are both provided at the outer sides of the two first magnets (7), and a second fluorine rubber seal is installed inside the first sealing groove (8).

6. A magnetic fluid sealing structure according to claim 1, characterised in that the housing (1) comprises a flange structure (101) and a barrel (102).