CN2588134Y

CN2588134Y - Seal transmission device

Info

Publication number: CN2588134Y
Application number: CN 02281518
Authority: CN
Inventors: 张西庚
Original assignee: SHENYANG JUZHI ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: SHENYANG JUZHI ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2002-12-02
Filing date: 2002-12-02
Publication date: 2003-11-26
Anticipated expiration: 2012-12-02

Abstract

The utility model relates to a seal transmission device, which is used for transmitting motion and power to vacuum and ultra high vacuum environments. A power inputting device is connected with one end of a main shaft; the other end of the main shaft is arranged in a vacuum chamber. The end of the main shaft connected with the power inputting device is connected with a casing by a bearing. A magnetic fluid cap is tightly attached to the bearing; a magnetic fluid is arranged between a magnetic fluid shell and the magnetic fluid cap; the magnetic fluid is used for isolating vacuum and non vacuum. A seal ring is arranged between the magnetic fluid shell and the casing for isolating vacuum and non vacuum. The magnetic fluid can also be replaced by a framework seal ring. The magnetic fluid can also be replaced by liquid metals. The bearing works in a non vacuum environment; the bearing can use various lubricants and is suitable for various rotating speeds; the utility model has the advantages of rigid transmission, high transmitting precision, high seal performance and low failure rate; the service life of the bearing can reach the theory service life. The design concept is suitable for magnetic fluid seal transmission devices, seal ring seal transmission devices, liquid metal seal transmission devices, etc.

Description

A kind of sealed gearing device

Affiliated technical field

The utility model relates to a kind of sealed gearing device, is used for to vacuum and ultra-high vacuum environment transmitting moving and power.

Background technique

In vacuum environment, the surface of material can lose the air protection film, with lubricator can vacuum environment be polluted and make, and this in most of the cases is unallowed.As everyone knows, when two material surfaces that do not have a protective film are in contact with one another in vacuum environment and have certain pressure, by thermodynamic principle as can be known, the material that constitutes two block of material will cause so-called cold welding phenomenon by the interdiffusion of surface of contact phase.When two kinds of materials of cold welding separate, will cause tearing and degrading of material surface, the reason that Here it is has the part surface of the motion of being in contact with one another can rapid wearing, bearing can damage rapidly in vacuum environment.

Needed motion and power in vacuum environment, in most of the cases need be imported by the outside, this just needs to solve transmission accuracy and speed, sealability, clean environment, high temperature and low temperature, be in contact with one another contradictions each other such as the part surface of motion is lubricated.For transmitting moving in vacuum environment and power, designed various mechanisms in the past: as the metal bellows sealed gearing device, seal ring sealed gearing device, magnetic force coupling actuator, magnet fluid sealing transmission device, liquid metal sealed gearing device etc.

Various mechanisms in the past are problem of ubiquity all, and promptly bearing is worked in vacuum environment, and bearing can not make with lubricator, and bearing weares and teares easily, the rate of fault height, and system leaks easily, keeps in repair very difficult.

The model utility content

The utility model provides a kind of bearing to work in non-vacuum environment for the technical problem that solves above-mentioned existence, and bearing can use various oiling agents, thereby is fit to the sealed gearing device of various rotational speed.

The technical solution of the utility model is as follows:

Power input device links to each other with an end of main shaft, and the other end of main shaft is in vacuum chamber.Is connected by bearing between the end that main shaft and power input device link to each other and the housing, the magnetic fluid lid is close to bearing, and magnetic fluid is between main shaft, magnetic fluid shell and magnetic fluid cover, and magnetic fluid is used for isolated vacuum and antivacuum.Between magnetic fluid shell and the housing by seal ring isolated vacuum and antivacuum.

Described magnetic fluid also can replace with backbone sealing ring.

Described magnetic fluid can also replace with liquid metal.

The utility model has designed the sealed gearing device that is exclusively used in transmitting moving and power in vacuum environment, and characteristics are that bearing is worked in non-vacuum environment, and bearing can use various oiling agents, is fit to various rotational speed; Positive drive, the transmission accuracy height; Sealability is preeminent, and rate of fault is low, and bearing can reach its theoretical life-span in working life.This design concept is not only applicable to the magnet fluid sealing transmission device, also is applicable to seal ring sealed gearing device and liquid metal sealed gearing device etc.

Describe the utility model in detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is a magnet fluid sealing transmission structures schematic representation of the present utility model.

Fig. 2 is a seal ring sealed gearing device structural representation of the present utility model.

Among Fig. 1, hanging scroll 1, main shaft 2, screw 3, housing 4, seal ring 1, seal ring 26, magnetic fluid 7, magnetic fluid shell 8, magnetic fluid lid 9, bearing 10, flange 11, bearing gland 12, locking nut 13, water gland 14, water seal body temperature 15, seal ring 3 16, backbone sealing ring 17, power input device 18, fixed support 19.

Among Fig. 2, hanging scroll 20, main shaft 21, screw 22, housing 23, backbone sealing ring 24, spacer 25, pressure pad 26, bearing 27, flange 28, bearing gland 29, water gland 30, water seal body 31, seal ring 32, power input device 33, fixed support 34.

Embodiment

Embodiment 1, is illustrated in figure 1 as the magnet fluid sealing transmission device, and power input device 18 links to each other with an end of main shaft 2, and the other end of main shaft 2 is in vacuum chamber.Is connected by bearing 10 between the end that main shaft 2 and power input device 18 links to each other and the housing 4, magnetic fluid covers 9 is close to bearing 10, and magnetic fluid 7 covers between 9 at main shaft 2, magnetic fluid shell 8 and magnetic fluid, and magnetic fluid 7 is used for isolated vacuum and antivacuum.Between magnetic fluid shell 8 and the housing 4 by seal ring 6 isolated vacuums and antivacuum.

If magnetic fluid is worked under high temperature or low temperature, be without prejudice in order to guarantee magnetic fluid, described main shaft and housing can adopt water-cooling pattern.

Embodiment 2, are illustrated in figure 2 as the seal ring sealed gearing device, and its structure and embodiment's 1 difference is to have replaced magnetic fluid shell 8, magnetic fluid 7, magnetic fluid lid 9 and seal ring 5 by backbone sealing ring 24, spacer 25 and pressure pad 26.

If seal ring is worked under high temperature or low temperature, be without prejudice in order to guarantee seal ring, described main shaft and housing can adopt water-cooling pattern.

Embodiment 3, are the liquid metal sealed driving mechanism, and its structure is substantially the same manner as Example 1, and the main distinction is that the magnetic fluid 7 described in the embodiment 1 is substituted by liquid metal.

If liquid metal is worked under high temperature or low temperature, reliable in order to guarantee the liquid metal sealing, described main shaft and housing can adopt water-cooling pattern.

Claims

1. sealed gearing device, comprise main shaft, housing, bearing, magnetic fluid, power input device links to each other with an end of main shaft, the other end of main shaft is in vacuum chamber, it is characterized in that being connected by bearing between a end that described main shaft and power input device link to each other and the housing, the magnetic fluid lid is close to bearing, and magnetic fluid is between main shaft, magnetic fluid shell and magnetic fluid lid.

2. a kind of sealed gearing device according to claim 1 is characterized in that described magnetic fluid can be substituted by backbone sealing ring.

3. a kind of sealed gearing device according to claim 1 is characterized in that described magnetic fluid can also be substituted by liquid metal.