CN115714291A

CN115714291A - Liquid slip ring

Info

Publication number: CN115714291A
Application number: CN202211573884.0A
Authority: CN
Inventors: 孔利振
Original assignee: Yueqing Weiming Machinery Co ltd
Current assignee: Yueqing Weiming Machinery Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-02-24

Abstract

The invention discloses a liquid slip ring, which comprises a shell, a stator main shaft, a rotor main shaft and a liquid conductive medium, wherein the end surfaces of one sides, close to each other, of the stator main shaft and the rotor main shaft are arranged in the shell to form a cavity, the liquid conductive medium is filled in the cavity, a bearing is arranged outside the rotor main shaft, a sealing cavity for blocking the liquid conductive medium from flowing out is formed in the shell by one side, facing the stator main shaft, of the bearing, and a magnet sleeved outside the rotor main shaft and magnetic liquid adsorbed to the magnet and filling the sealing cavity are arranged in the sealing cavity; the invention has the advantages of reliable sealing performance, small torque, high rotating speed and long service life.

Description

Liquid slip ring

Technical Field

The invention relates to the technical field of conductive slip rings, in particular to a liquid slip ring.

Background

The conductive slip ring belongs to the application range of electric contact sliding connection, is also called slip ring, or called rotary joint, rotary electric interface, slip ring, reflux ring and adapter, and is a precise power transmission device for realizing image, data signal and power transmission by two relative rotating mechanisms. It is particularly suitable for use in locations where unlimited continuous rotation is desired while power or data is being transferred from a fixed position to a rotating position.

Chinese patent that prior application patent publication number is CN208655908U discloses a liquid conductive slip ring, including shell, stator main shaft, stator insulation cover, rotor main shaft, rotor insulation cover and liquid conducting medium, one side that stator insulation cover was overlapped towards the rotor insulation is provided with the lip that blocks that is used for blockking that liquid conducting medium flows, one side of rotor insulation cover is provided with the recess that can hold and block the lip, the one end that blocks the lip is provided with first sealing member in the recess, one side that blocks the lip is kept away from to first sealing member is provided with the elasticity foaming cotton in the recess.

The problems that exist in the above patents: the existing liquid slip ring stator and the rotor relatively rotate, the blocking lip and the groove of the stator insulating sleeve and the rotor insulating sleeve are in sealing fit, but the contact surfaces of the stator insulating sleeve and the rotor insulating sleeve are hard contact surfaces, friction force is large, torque is large, the rotating speed of the liquid slip ring is influenced, and the structure of the liquid slip ring is improved based on the problem so as to improve the performance of the liquid slip ring.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art and provide a liquid slip ring.

In order to realize the purpose, the invention provides the following technical scheme: the liquid slip ring comprises a shell, a stator main shaft, a rotor main shaft and a liquid conductive medium, wherein a cavity is formed in the shell by the end face of one side, close to each other, of the stator main shaft and the rotor main shaft, the liquid conductive medium is filled in the cavity, a bearing is arranged outside the rotor main shaft, a sealing cavity used for blocking the liquid conductive medium from flowing out is formed in the shell by the side, facing the stator main shaft, of the bearing, and a magnet sleeved outside the rotor main shaft and magnetic liquid adsorbed to the magnet and filling the sealing cavity are arranged in the sealing cavity.

According to a preferable technical scheme of the invention, the magnet outer ring is attached to the inner wall of the shell, and the magnetic liquid is filled between the magnet inner ring and the outer wall of the rotor spindle.

According to a preferable technical scheme of the invention, the magnet inner ring is attached to the outer wall of the rotor spindle, and the magnetic liquid is filled between the magnet outer ring and the inner wall of the shell.

As a preferable technical scheme of the invention, the magnetic liquid is formed by stirring magnetic powder, grease and oleic acid, and the magnetic liquid is colloidal.

As a preferable aspect of the present invention, the upper end surface and/or the lower end surface of the magnet is provided with a magnetic shoe.

In a preferred embodiment of the present invention, a gasket is disposed in the sealing cavity between the magnetic fluid at the upper end of the magnetic shoe and the bearing.

As a preferred technical scheme of the present invention, the end surface of one side of the bearing away from the stator main shaft is provided with a seal cotton sleeved outside the rotor main shaft and a bearing gland for fixing the seal cotton on the bearing, and one side of the housing close to the bearing gland is provided with a bending portion capable of limiting the bearing gland.

As a preferred technical scheme of the invention, the bearing gland comprises an upper cover and a lower cover, the lower cover is arranged in the upper cover, the sealing cotton is arranged between the inner ring of the lower cover and the rotor spindle, and a sealing element positioned at the top of the sealing cotton is arranged between the lower cover and the upper cover.

As a preferred technical scheme of the present invention, one end of the rotor spindle in the housing is provided with a retaining ring, and an outer wall of the retaining ring is tightly attached to an inner wall of the housing, and the retaining ring is used for separating the magnetic fluid in the sealed cavity from the liquid conductive medium in the cavity.

As a preferable technical scheme of the invention, a spacer is arranged on one side of the sealing cavity of the retainer ring and used for blocking liquid conductive media and magnetic liquid.

In conclusion, the beneficial effects of the invention are as follows: it has liquid conductive medium to fill between rotor spindle and the stator spindle, rotor spindle and stator spindle's contact terminal surface does not directly contact, the friction is little, the moment of torsion is little, thereby improve liquid sliding ring rotational speed, liquid sliding ring rotates conductive medium and will receives the effect of centrifugal force and disperse all around, flow from the clearance department easily, consequently this application sets up magnet and fills the magnetic fluid in the sealed cavity, realize the full-seal in the sealed cavity, thereby realize zero leakage, make liquid conductive medium be located the cavity that forms between rotor spindle and the stator spindle all the time, prolong liquid sliding ring's life, improve the wholeness ability by a wide margin.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of the second embodiment;

fig. 4 is an enlarged view of a portion B of fig. 3.

Reference numerals: 1. a housing; 2. a stator main shaft; 3. a rotor spindle; 4. a liquid conductive medium; 5. a cavity; 6. a bearing; 7. sealing the cavity; 8. a magnet; 9. magnetic liquid; 10. a magnetic shoe; 11. a gasket; 12. sealing cotton; 13. an upper cover; 14. a lower cover; 15. a bending section; 16. a retainer ring; 17. a spacer; 18. a bearing gland; 19. and a seal.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, which are provided for the purpose of illustrating the invention and are not intended to limit the invention to the particular embodiments disclosed. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

A liquid sliding ring as shown in fig. 1 to 4, including shell 1, stator spindle 2, rotor spindle 3 and liquid conducting medium 4, liquid conducting medium 4 is liquid mercury or gallium alloy, stator spindle 2 and rotor spindle 3 are close to one side terminal surface each other and form cavity 5 in shell 1, cavity 5 is filled with liquid conducting medium 4, rotor spindle 3 is provided with bearing 6 outward, bearing 6 forms the seal chamber 7 that is used for blockking liquid conducting medium 4 to flow out in shell 1 towards stator spindle 2 one side, be provided with the cover in seal chamber 7 and locate the outer magnet 8 of rotor spindle 3 and adsorb in magnet 8 and with the magnetic fluid 9 that seal chamber 7 was filled with, bearing 6 is provided with one at least in this embodiment.

It has liquid conducting medium 4 to fill between rotor spindle 3 and the stator main shaft 2, rotor spindle 3 and stator main shaft 2's contact terminal surface does not directly contact, the friction is little, the moment of torsion is little, thereby improve liquid sliding ring rotational speed, liquid sliding ring rotates conducting medium and will receive the effect of centrifugal force and disperse all around, flow from the clearance easily, consequently, this application sets up magnet 8 and fills magnetic fluid 9 in seal chamber 7, to realize the full-seal in seal chamber 7, thereby realize zero and reveal, make liquid conducting medium 4 be located the cavity 5 that forms between rotor spindle 3 and the stator main shaft 2 all the time, prolong liquid sliding ring's life, the wholeness can be improved by a wide margin.

8 outer lane of magnet and the laminating of 1 inner wall mutually of shell, it has magnetic liquid 9 to fill between 8 inner circles of magnet and the 3 outer walls of rotor spindle, magnetic liquid 9 passes through the magnetic, the grease in this embodiment, form after the oleic acid stirring, magnetic liquid 9 is the setting of this structure of gelatineous and can guarantees sealed reliability, realize zero leakage,

magnetic liquid

9 and 3 outer wall direct contact of rotor spindle simultaneously, because magnetic liquid 9 is the gelatineous, the flexible mixture contacts with rotor spindle 3, the friction is little, the moment of torsion is little, the rotational speed is fast, compare the liquid sliding ring on the market mutually, the better and long service life of performance.

The upper end face and/or the lower end face of the magnet 8 are/is provided with the magnetic shoes 10, the magnetic shoes 10 are metal sheets with good magnetic conductivity, and the magnetic liquid 9 at the positions of the magnetic shoes 10 is dense, so that the sealing performance of the magnetic shoes can be effectively improved, and the service life of the magnetic shoes can be prolonged.

A gasket 11 is arranged between the magnetic liquid 9 at the upper end of the magnetic shoe 10 and the bearing 6 in the sealing cavity 7.

The end face of one side of the bearing 6 far away from the stator main shaft 2 is provided with a sealing cotton 12 sleeved outside the rotor main shaft 3 and a bearing 6 gland used for fixing the sealing cotton 12 on the bearing 6, and one side of the shell 1 close to the bearing 6 gland is provided with a bending part 15 capable of limiting the bearing 6 gland.

The bearing 6 gland comprises an upper cover 13 and a lower cover 14, the lower cover 14 is arranged in the upper cover 13, the sealing cotton 12 is arranged between the inner ring of the lower cover 14 and the rotor spindle 3, a sealing piece 19 positioned at the top of the sealing cotton 12 is arranged between the lower cover 14 and the upper cover 13, the sealing piece 19 is in primary sealing in the embodiment, external liquid and dust are prevented from entering a liquid slip ring, an anti-corrosion effect is achieved, the sealing cotton 12 is in secondary sealing, when the sealing piece 19 fails, the sealing cotton 12 can continuously realize sealing, and the sealing cotton 12 can be soaked in lubricating oil for use.

One end of the rotor spindle 3 in the housing 1 is provided with a retaining ring 16, the outer wall of the retaining ring 16 is tightly attached to the inner wall of the housing 1, the retaining ring 16 is a part of the rotor spindle 3, the retaining ring 16 is used for separating the magnetic liquid 9 in the sealed cavity 7 from the liquid conductive medium 4 in the cavity 5, the retaining ring 16 is provided with a spacer 17 on one side of the sealed cavity 7, the spacer 17 is used for separating the liquid conductive medium 4 from the magnetic liquid 9 and avoiding contact between the two as much as possible, and the main material of the spacer is wear-resistant plastic, such as PVC.

The difference between the second embodiment and the first embodiment is:

the inner ring of the magnet 8 is attached to the outer wall of the rotor spindle 3, and magnetic liquid 9 is filled between the outer ring of the magnet 8 and the inner wall of the shell 1.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and the preferred embodiments of the present invention are described in the above-described embodiments and the description, and not intended to limit the present invention, but various changes and modifications may be made within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents, without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a liquid sliding ring, includes shell, stator main shaft, rotor main shaft and liquid conducting medium, stator main shaft and rotor main shaft are close to a side end face each other and form the cavity in the shell, the cavity intussuseption is filled with liquid conducting medium, the rotor main shaft is provided with bearing, its characterized in that outward: and a sealing cavity for blocking the liquid conductive medium from flowing out is formed in the shell on one side of the bearing, which faces the stator spindle, and a magnet sleeved outside the rotor spindle and magnetic liquid adsorbed on the magnet and filling the sealing cavity are arranged in the sealing cavity.

2. The liquid slip ring of claim 1, wherein: the outer ring of the magnet is attached to the inner wall of the shell, and the magnetic liquid is filled between the inner ring of the magnet and the outer wall of the rotor spindle.

3. The liquid traveler of claim 1, wherein: the magnet inner ring is attached to the outer wall of the rotor spindle, and the magnetic liquid is filled between the magnet outer ring and the inner wall of the shell.

4. The liquid slip ring of claim 2 or 3, wherein: the magnetic liquid is formed by stirring magnetic powder, grease and oleic acid, and the magnetic liquid is colloidal.

5. The liquid traveler of claim 4, wherein: and magnetic shoes are arranged on the upper end surface and/or the lower end surface of the magnet.

6. The liquid slip ring of claim 5, wherein: and a gasket is arranged in the sealing cavity between the magnetic liquid at the upper end of the magnetic shoe and the bearing.

7. The liquid traveler of claim 1, wherein: the bearing is kept away from one side terminal surface of stator main shaft and is provided with the cover and locates the outer sealed cotton of rotor main shaft, be used for being fixed in the bearing gland on the bearing with the sealed cotton, one side that the shell is close to the bearing gland is provided with and carries out spacing kink to the bearing gland.

8. The liquid traveler of claim 7, wherein: the bearing gland comprises an upper cover and a lower cover, the lower cover is arranged in the upper cover, the sealing cotton is arranged between the inner ring of the lower cover and the rotor spindle, and a sealing element positioned at the top of the sealing cotton is arranged between the lower cover and the upper cover.

9. The liquid traveler of claim 1, wherein: and one end of the rotor spindle in the shell is provided with a check ring, the outer wall of the check ring is tightly attached to the inner wall of the shell, and the check ring is used for separating the magnetic liquid in the sealed cavity and the liquid conductive medium in the cavity.

10. The liquid traveler of claim 9, wherein: and a spacer is arranged on one side of the sealing cavity of the retainer ring and used for separating a liquid conductive medium and magnetic liquid.