CN102425672A

CN102425672A - Split magnetic liquid sealing device

Info

Publication number: CN102425672A
Application number: CN2011102404519A
Authority: CN
Inventors: 李德才
Original assignee: Beijing Jiaotong University
Current assignee: Beijing Jiaotong University
Priority date: 2011-08-19
Filing date: 2011-08-19
Publication date: 2012-04-25
Anticipated expiration: 2031-08-19
Also published as: CN102425672B

Abstract

The invention discloses a split magnetic liquid sealing device, which belongs to the technical field of sealing of mechanical engineering and is used for solving the problem of rotary seal of an equipment shaft and a motor shaft when equipment and a motor cannot be moved after a large-power motor shaft and driven equipment are connected and arranged. In the device, an upper half outer sleeve (7-1) and a lower half outer sleeve (7-2) are buckled on a shaft, and are connected into an outer sleeve through a screw and a nut; N/2 cylindrical permanent magnets (1) are bonded between an upper half first pole shoe (2-1) and an upper half second pole shoe (15-1), and a magnetic liquid is injected to constitute an upper half sealing assembly; another N/2 cylindrical permanent magnets (1) are bonded between a lower half first pole shoe (2-2) and a lower half second pole shoe (15-2) to constitute a lower half sealing assembly; the upper half sealing assembly and the lower half sealing assembly are connected into a sealing assembly through a screw and a nut; a first O-shaped sealing ring (3) is arranged on the sealing assembly; and the sealing assembly is pushed into the outer sleeve along the shaft, and is fixed by using an upper half end cover and a lower half end cover. The seal is suitable for rotary movement seal for shafts.

Description

A kind of split magnetic fluid seal device

Technical field

The invention belongs to the mechanical engineering technical field of sealing technology, be specially adapted to rotate under the inconvenient situation of axle head connection device mounting or dismounting, and a sealing that rotates.

Background technique

Magnetic fluid sealing has the characteristic of a lot of uniquenesses than other sealings, in reality, obtains extensive use, generally; Magnetic fluid sealing all is integral installation, but in the commercial Application process, often runs into motor shaft and the bigger situation of institute's connection device power, and the axle head of equipment axle head or motor need cool off; The motor feels hot in control, and this just requires motor is sealed, and prevents that the freezing mixture of motor internal from leaking; The conventional seals device is overall structure; In the process of fitting tight device, need earlier at the axle head of the equipment seal arrangement of packing into, and then equipment axle head and motor shaft are linked together.Like this, whole assembly process can consume the plenty of time, has a strong impact on production process, and under especially a lot of situation, the axle of the axle head of equipment and motor connects, and at this moment equipment and motor all can not move, and can not use magnetic fluid sealing.

Summary of the invention

To be the large power, electrically arbor connect with the equipment that is driven problem to be solved by this invention, install, when equipment and motor all can not move, the rotary seal problem of equipment axis and motor shaft.

Technological scheme of the present invention:

A kind of split magnetic fluid seal device, this device comprise N cylindrical magnet iron, first first pole shoe, second first pole shoe, an O RunddichtringO, the 2nd O RunddichtringO, first overcoat, second overcoat, first end cap, second end cap, first second pole shoe, second second pole shoe, first screw, second screw, the 3rd screw, the 4th screw, the 5th screw, the 6th screw, the 7th screw, the 8th screw, the 9th screw, the tenth screw, the 11 screw, the 12 screw, the 13 screw, the 14 screw, the 15 screw, nut and magnetic liquid.

First overcoat and second overcoat are buckled on the axle, connect into overcoat with the 3rd screw, the 4th screw, the 5th screw, the 13 screw, the 14 screw, the 15 screw and nut.

The one side that first first pole shoe is established boss is bonding with N/2 cylindrical magnet iron one side; The one side that the another side of N/2 cylindrical magnet iron and first second pole shoe are established boss is bonding; Between first first pole shoe and first second pole shoe, inject magnetic liquid; Constitute first black box, first black box is buckled on the axle;

The one side that second first pole shoe is established boss is bonding with other N/2 cylindrical magnet iron one side, and the another side of N/2 cylindrical magnet iron and second the second pole shoe one side of establishing boss is bonding in addition, constitutes second black box, and second black box is buckled on the axle.

First black box and second black box are alignd on axle, connect into black box with first screw, second screw, the 7th screw, the 8th screw, the 9th screw, the tenth screw, the 11 screw, the 12 screw and nut.

The one O RunddichtringO is cut, be enclosed within axle and go up and stick together, in first first pole shoe that is installed in black box and second first pole shoe groove.

Black box is pushed in the overcoat along axle, the 2nd O RunddichtringO is cut, be enclosed within axle and go up and stick together, be installed in first end cap and second end cap groove, with screw that first end cap and second end cap is fixing on the coat.

The inner diameter d 1 of described overcoat is than the inner diameter d 2 little 1～2mm of first first pole shoe, second first pole shoe utmost point tooth tooth top.

The base load liquid of described magnetic liquid is for fluoridizing carbon back or ester group, and the magnetization intensity is higher than 300 Gausses.

The number N=2 π R/d of described cylindrical magnet iron, R is the radius of cylindrical magnet iron position, d is the diameter of cylindrical magnet iron.

The invention has the beneficial effects as follows: do not removing under motor coupling device and the original situation about connecting of motor; Just can carry out the installation and maintenance of seal arrangement to the axle head of motor shaft or coupling device; Both saved the installation and maintenance time, and can make the application that is sealed under this kind situation of magnetic liquid become possibility again.

Description of drawings

Fig. 1 split magnetic fluid seal device plan view.

The rear view of Fig. 2 split magnetic fluid seal device.

The A-A view of Fig. 3 Fig. 1.

The a enlarged view of Fig. 4 Fig. 1.

The b enlarged view of Fig. 5 Fig. 3.

The B-B view of Fig. 6 Fig. 1.

The C-C sectional drawing of Fig. 7 Fig. 3.

First first pole shoe of Fig. 8 and second first pole shoe plan view.

The D-D sectional drawing of Fig. 9 Fig. 8.

The E-E sectional drawing of Figure 10 Fig. 8.

Among the figure: cylindrical magnet iron 1; First first pole shoe 2-1; Second first pole shoe 2-2; The one O RunddichtringO 3; The 2nd O RunddichtringO 12; First overcoat 7-1; Second overcoat 7-2; First end cap 11-1; Second end cap 11-2; First second pole shoe 15-1; Second second pole shoe 15-2; First screw 4; Second screw 5; The 3rd screw 6; The 4th screw 8; The 5th screw 9; The 6th screw 10; The 7th screw 13; The 8th screw 14; The 9th screw 16; The tenth screw 17; The 11 screw 18; The 12 screw 19; The 13 screw 20; The 14 screw 21; The 15 screw 22.

Embodiment

Contrast accompanying drawing specific embodiments of the invention is done further detailed description:

A kind of split magnetic fluid seal device; Like Fig. 1,2,3,4, shown in 6, this device comprises N cylindrical magnet iron 1, first first pole shoe 2-1, second first pole shoe 2-2, an O RunddichtringO 3, the 2nd O RunddichtringO 12, first overcoat 7-1, second overcoat 7-2, first end cap 11-1, second end cap 11-2, first second pole shoe 15-1, second second pole shoe 15-2, first screw 4, second screw 5, the 3rd screw 6, the 4th screw 8, the 5th screw 9, the 6th screw 10, the 7th screw 13, the 8th screw 14, the 9th screw 16, the tenth screw the 17, the 11 screw the 18, the 12 screw the 19, the 13 screw the 20, the 14 screw the 21, the 15 screw 22, nut and magnetic liquid.

First overcoat 7-1 and second overcoat 7-2 are buckled on the axle, connect into overcoat with the 3rd screw 6, the 4th screw 8, the 5th screw the 9, the 13 screw the 20, the 14 screw the 21, the 15 screw 22 and nut, like Fig. 1,2, shown in 4.

The one side that first first pole shoe 2-1 establishes boss is bonding with N/2 cylindrical magnet iron 1 one side; It is bonding that the another side of N/2 cylindrical magnet iron 1 and first second pole shoe 15-1 establish the one side of boss; As shown in Figure 3; Between first first pole shoe 2-1 and first second pole shoe 15-1, inject magnetic liquid, constitute first black box, first black box is buckled on the axle;

The one side that second first pole shoe 2-2 establishes boss is bonding with other N/2 cylindrical magnet iron 1 one side; It is bonding that the another side of N/2 cylindrical magnet iron 1 and second second pole shoe 15-2 establish the one side of boss in addition; Like Fig. 6,9, shown in 10; Constitute second black box, second black box is buckled on the axle.

First black box and second black box are alignd on axle; Connect into black box with first screw 4, second screw 5, the 7th screw 13, the 8th screw 14, the 9th screw 16, the tenth screw the 17, the 11 screw the 18, the 12 screw 19 and nut, like Fig. 3,9, shown in 10.

The one O RunddichtringO 3 is cut, be enclosed within axle and go up and stick together, in first the first pole shoe 2-1 that is installed in black box and second the first pole shoe 2-2 groove.

Black box is pushed in the overcoat along axle; The 2nd O RunddichtringO 12 is cut, be enclosed within axle and go up and stick together, be installed in first end cap 11-1 and second end cap 11-2 groove; With screw 10 that first end cap 11-1 and second end cap 11-2 is fixing on the coat, like Fig. 3, shown in 6.

The inner diameter d 1 of described overcoat is than the inner diameter d 2 little 1～2mm of first first pole shoe 2-1, second first pole shoe 2-2 utmost point tooth tooth top, and is as shown in Figure 5.

Sealing when equipment is used the cooling of fluorine Lyons, the base load liquid that adopts magnetic liquid is for fluoridizing carbon back, and the magnetization intensity is higher than 300 Gausses, and the ester group magnetic liquid is used in general vacuum seal, and the magnetization intensity is higher than 300 Gausses.

The number N=2 π R/d of described cylindrical magnet iron 1, R is the radius of cylindrical magnet iron 1 position, d is the diameter of cylindrical magnet iron 1, and is as shown in Figure 7.

All " O " type rubber ring material all is fluorine rubber; Permanent magnet 1 the selection of material is a rubidium iron canopy; Upper and lower half first and second pole shoe material is 3Cr13.

Use-case: magnetic liquid research institute of Beijing Jiaotong University rotary seal Laboratory Furniture; Power of motor is big, and the motor internal freezing mixture has leakage phenomenon, and motor shaft is bigger; Motor shaft connects with the equipment axis that will test; Dismounting is inconvenient, adopts the present invention, has solved motor internal freezing mixture leakage problem.

Claims

1. split magnetic fluid seal device is characterized in that:

This device comprises N cylindrical magnet iron (1); First first pole shoe (2-1); Second first pole shoe (2-2); The one O RunddichtringO (3); The 2nd O RunddichtringO (12); First overcoat (7-1); Second overcoat (7-2); First end cap (11-1); Second end cap (11-2); First second pole shoe (15-1); Second second pole shoe (15-2); First screw (4); Second screw (5); The 3rd screw (6); The 4th screw (8); The 5th screw (9); The 6th screw (10); The 7th screw (13); The 8th screw (14); The 9th screw (16); The tenth screw (17); The 11 screw (18); The 12 screw (19); The 13 screw (20); The 14 screw (21); The 15 screw (22); Nut and magnetic liquid;

First overcoat (7-1) and second overcoat (7-2) are buckled on the axle, connect into overcoat with the 3rd screw (6), the 4th screw (8), the 5th screw (9), the 13 screw (20), the 14 screw (21), the 15 screw (22) and nut;

The one side that first first pole shoe (2-1) is established boss is bonding with N/2 cylindrical magnet iron (1) one side; The one side that the another side of N/2 cylindrical magnet iron (1) and first second pole shoe (15-1) are established boss is bonding; Between first first pole shoe (2-1) and first second pole shoe (15-1), inject magnetic liquid; Constitute first black box, first black box is buckled on the axle;

The one side that second first pole shoe (2-2) is established boss is bonding with other N/2 cylindrical magnet iron (1) one side; The another side of N/2 cylindrical magnet iron (1) and second second pole shoe (15-2) one side of establishing boss is bonding in addition; Constitute second black box, second black box is buckled on the axle;

First black box and second black box are alignd on axle, connect into black box with first screw (4), second screw (5), the 7th screw (13), the 8th screw (14), the 9th screw (16), the tenth screw (17), the 11 screw (18), the 12 screw (19) and nut;

The one O RunddichtringO (3) is cut, be enclosed within axle and go up and stick together, be installed in first first pole shoe (2-1) and second first pole shoe (2-2) groove of black box;

Black box is pushed in the overcoat along axle; The 2nd O RunddichtringO (12) is cut; Be enclosed within axle and go up and stick together, be installed in first end cap (11-1) and second end cap (11-2) groove, first end cap (11-1) and second end cap (11-2) are fixed on the coat with screw (10).

2. a kind of split magnetic fluid seal device according to claim 1 is characterized in that:

The inner diameter d 1 of described overcoat is than the inner diameter d 2 little 1～2mm of first first pole shoe (2-1), second first pole shoe (2-2) utmost point tooth tooth top.

3. a kind of split magnetic fluid seal device according to claim 1 is characterized in that:

4. a kind of split magnetic fluid seal device according to claim 1 is characterized in that:

The number N=2 π R/d of described cylindrical magnet iron (1),, R is the radius of cylindrical magnet iron (1) position, d is the diameter of cylindrical magnet iron (1).