CN210890096U

CN210890096U - Anti-deflection multi-lip sealing device for shaft

Info

Publication number: CN210890096U
Application number: CN201921386899.XU
Authority: CN
Inventors: 邓伦胜; 章宏清
Original assignee: JIANGMEN XINHUI SEALING TECHNOLOGY CO LTD
Current assignee: Guangdong Xinhui Technology Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-06-30
Anticipated expiration: 2029-08-26

Abstract

The utility model provides an anti-deflection multi-lip sealing device for shaft, which consists of a movable ring and a static ring, wherein the section of the movable ring is in F shape, the movable ring comprises an inner movable ring, an outer movable ring and a retaining ring, the inner movable ring and the retaining ring are arranged along the axial direction, the inner circumference of the retaining ring is fixedly connected with the outer circumference of a gear shaft sleeve, and the inner movable ring and the outer movable ring are both arranged in an annular mounting groove on the retaining ring; the cross section of the static ring is C-shaped and comprises an inner sealing ring and an outer sealing ring which are arranged along the axial direction and a neck connecting ring which is arranged along the radial direction, the right end of the outer sealing ring is fixedly and hermetically connected with the side wall of the box body, the neck connecting ring is connected and fixed with the box body through a connecting plate and a bolt, and the right end of the inner sealing ring is provided with a sealing lip with an X-shaped cross section. The device can carry out better sealing to the cavity that contains lubricating grease between axis of rotation and the box, can also deal with the axial beat and the radial beat that the rotatory in-process of gear appears simultaneously, guarantees the sealed effect under the beat operating mode.

Description

Anti-deflection multi-lip sealing device for shaft

Technical Field

The utility model provides a sealing device especially provides a sealing device that is arranged in the axis of rotation to seal the axis of rotation and has anti beat function, belongs to mechanical seal technical field.

Background

The labyrinth seal is a device which is characterized in that a plurality of annular seal teeth which are sequentially arranged are arranged around a gear shaft sleeve, a series of closure gaps and expansion cavities are formed between the teeth, and the purpose of leakage resistance is achieved by the throttling effect generated when a sealed medium passes through the gaps of the zigzag labyrinth. The labyrinth seal has no solid contact because of the clearance between the rotor and the casing, and allows thermal expansion, so that the labyrinth seal is suitable for occasions of high temperature, high pressure and high rotating speed frequency, and is widely used for sealing shaft ends and stages of steam turbines, gas turbines, compressors and blowers.

In some occasions with strict use requirements, the sealing device not only needs to achieve zero leakage of lubricating oil in the sealing cavity, but also needs to achieve the purpose of preventing external pollutants from entering the sealing cavity, and in addition, the sealing device also has higher requirements on the service life of the sealing element.

In addition, due to the fact that the gear shaft sleeve is not manufactured and installed in a standard mode or due to a specific rotating mode, the gear shaft sleeve is likely to have large-amplitude deflection in the radial direction in the rotating process. Therefore, the sealing device which has excellent sealing performance and is suitable for the deflection working condition is provided, and the problem to be solved in the field is solved.

Disclosure of Invention

The utility model discloses to the defect that exists among the background art, provide an axle is with anti beat type lip seal device that inclines, the device can carry out better sealing to the cavity that contains lubricating grease between gear bush and the box, can also deal with the axial beat and the radial beat that appear in the gear bush rotation process simultaneously, guarantees the sealed effect under the beat operating mode.

Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:

the utility model provides an anti-beat type multi-lip sealing device for shaft, installs between gear shaft sleeve and box, the gear shaft sleeve is installed in the box and stretches out from the box, and the space between the box inside and the gear shaft sleeve is the seal chamber, the anti-beat type multi-lip sealing device for shaft comprises rotating ring and quiet ring, the rotating ring includes along the inner rotating ring, outer rotating ring that set up of axial and radial setting retaining ring, the inner circumference of retaining ring and the outer circumference of gear shaft sleeve fixed connection, be provided with annular mounting groove on the lateral wall of retaining ring, inner rotating ring and outer rotating ring are all installed in the annular mounting groove on the retaining ring, and fix inner rotating ring and outer rotating ring on the retaining ring through the jackscrew;

the section of the static ring is C-shaped and comprises an inner sealing ring, an outer sealing ring and a neck connecting ring, wherein the inner sealing ring and the outer sealing ring are arranged along the axial direction, the neck connecting ring is arranged along the radial direction, the right end of the outer sealing ring is fixedly and hermetically connected with the side wall of the box body, the neck connecting ring is connected and fixedly connected with the box body through a connecting plate and a bolt, a sealing lip with an X-shaped section is arranged at the right end of the inner sealing ring, the sealing lip is positioned between the inner moving ring and the outer moving ring and is tightly contacted and sealed with the outer circumference of the inner moving ring and the inner circumference of the outer moving ring, an annular spring leaf with a V-shaped section is fixed in the sealing lip, and the spring.

The retainer ring is composed of metal supporting blocks and rubber filling blocks which are arranged in a staggered mode to form a continuous ring shape, wherein the metal supporting blocks are fixed with the gear shaft sleeve through welding, threaded holes are formed in the metal supporting blocks along the radial direction, and jackscrews are installed in the threaded holes and fix the inner movable ring and the outer movable ring.

The static ring is an integrated structure formed by connecting a metal framework, a supporting block and a steel plate net through vulcanized rubber.

Compared with the prior art, the utility model provides an anti beat type lip seal device for axle has following advantage: 1. the utility model discloses a interlude cooperation between rotating ring and the quiet ring, the sealing lip that sets up on the quiet ring is sealed with the intimate contact between the rotating ring to realize good sealed effect. 2. When the gear has axial deflection in the rotation process, the static ring is axially fixed; the movable ring is fixed with the gear shaft sleeve, so that the movable ring can swing axially along with the gear shaft sleeve, the sealing lip slides axially relative to the movable ring, and the sealing lip on the static ring is in close contact with the movable ring at any time in the moving process to seal so as to deal with axial deflection. 3. When the gear radial beat appears in rotatory in-process, the rotating ring can the centre gripping seal lip carry out radial beat together, and the left half portion of quiet ring should radial beat through warping this moment, and the metal framework who sets up in the quiet ring can strengthen the pliability and the elasticity of quiet ring. 4. An annular spring leaf with a V-shaped section is fixed in the sealing lip in the static ring, the spring leaf expands outwards to enable the sealing lip to be kept in a close contact state with the outer moving ring and the inner moving ring, and the sealing lip can be kept sealed with the outer moving ring and the inner moving ring even under the working condition of deflection rotation.

Drawings

Fig. 1 is a schematic view of an overall structure of an anti-yaw multi-lip sealing device for a shaft according to the present invention;

in the figure: the structure comprises a box body 1, a gear shaft sleeve 2, a sealing cavity 3, an inner movable ring 4, an outer movable ring 5, a retainer ring 6, a jackscrew 7, an inner sealing ring 8, a framework 9, an outer sealing ring 10, a neck connecting ring 11, a connecting plate 12, a bolt 13, a sealing lip 14 and a spring piece 15.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The utility model provides an axle is with anti many lips of type sealing device of beat overall structure is as shown in figure 1, gear shaft sleeve 2 is installed in box 1 and is stretched out from the box, and the space between the box inside and the gear shaft sleeve is seal chamber 3, the axle is with anti many lips of type sealing device of beat comprises rotating ring and quiet ring, the rotating ring includes along the interior rotating ring 4 of axial setting, outer rotating ring 5 and along the retaining ring 6 of radial setting, the outer circumference fixed connection of the interior circumference of retaining ring and gear shaft sleeve is provided with annular mounting groove on the lateral wall of retaining ring, and interior rotating ring and outer rotating ring are all installed in the annular mounting groove on the retaining ring to fix interior rotating ring and outer rotating ring on the retaining ring through jackscrew 7. The retainer ring is composed of metal supporting blocks and rubber filling blocks which are arranged in a staggered mode to form a continuous ring shape, wherein the metal supporting blocks are fixed with the gear shaft sleeve through welding, threaded holes are formed in the metal supporting blocks along the radial direction, and jackscrews are installed in the threaded holes and fix the inner movable ring and the outer movable ring.

The section of the static ring is C-shaped, and the static ring is composed of an inner sealing ring 8 and an outer sealing ring 10 which are axially arranged and a neck connecting ring 11 which is radially arranged, the right end of the outer sealing ring is fixedly and hermetically connected with the side wall of the box body, and the neck connecting ring is connected and fixed with the box body 1 through a connecting plate 12 and a bolt 13. In this embodiment, the bolts and the connecting plate are provided with two sets, one set is used for fixing the neck connecting ring, and the other set of bolts is used for tightly propping the step arranged at the right end of the outer sealing ring against the side wall of the box body, so that the outer sealing ring is hermetically connected with the box body.

The right-hand member of interior sealing ring is provided with the seal lip 14 that the cross-section is the X type, seal lip is located between interior rotating ring and the outer rotating ring, and seals with the outer circumference of interior rotating ring and the interior circumference in close contact with of outer rotating ring, the utility model discloses a cooperation of alternating between rotating ring and the quiet ring, the close contact is sealed between the seal lip that sets up on the quiet ring and the rotating ring to realize good sealed effect. An annular spring piece 15 with a V-shaped section is fixed in the sealing lip, the spring piece expands outwards to keep the sealing lip in a close contact state with the outer moving ring and the inner moving ring, and the sealing lip can keep sealed with the outer moving ring and the inner moving ring even under the working condition of deflection rotation. The static ring is an integrated structure formed by connecting a metal framework 9, a supporting block and a steel plate net through vulcanized rubber.

When the gear has axial deflection in the rotation process in the working process, the static ring is axially fixed; the movable ring is fixed with the gear shaft sleeve, so that the movable ring can swing axially along with the gear shaft sleeve, the sealing lip slides axially relative to the movable ring, and the sealing lip on the static ring is in close contact with the movable ring at any time in the moving process to seal so as to deal with axial deflection. When the gear radial beat appears in rotatory in-process, the rotating ring can the centre gripping seal lip carry out radial beat together, and the left half portion of quiet ring should radial beat through warping this moment, and the metal framework who sets up in the quiet ring can strengthen the pliability and the elasticity of quiet ring.

Claims

1. The utility model provides an axle is with anti many lips sealing device of beat type, installs between gear shaft sleeve and box, gear shaft sleeve installs in the box and stretches out in the box, and the space between the box inside and the gear shaft sleeve is sealed chamber, its characterized in that: the shaft deflection-resisting multi-lip sealing device consists of a movable ring and a stationary ring, wherein the movable ring comprises an inner movable ring, an outer movable ring and a retainer ring, the inner movable ring and the outer movable ring are arranged along the axial direction, the retainer ring is arranged along the radial direction, the inner circumference of the retainer ring is fixedly connected with the outer circumference of a gear shaft sleeve, the side wall of the retainer ring is provided with an annular mounting groove, the inner movable ring and the outer movable ring are both arranged in the annular mounting groove on the retainer ring, and the inner movable ring and the outer movable ring are fixed on the retainer ring through jackscrews;

2. The anti-yaw multi-lip seal device for a shaft according to claim 1, characterized in that: the retainer ring is composed of metal supporting blocks and rubber filling blocks which are arranged in a staggered mode to form a continuous ring shape, wherein the metal supporting blocks are fixed with the gear shaft sleeve through welding, threaded holes are formed in the metal supporting blocks along the radial direction, and jackscrews are installed in the threaded holes and fix the inner movable ring and the outer movable ring.

3. The anti-yaw multi-lip seal device for a shaft according to claim 1, characterized in that: the static ring is an integrated structure formed by connecting a metal framework, a supporting block and a steel plate net through vulcanized rubber.