CN213451686U

CN213451686U - Clamp-fixed type wave-shaped anti-deflection sealing device

Info

Publication number: CN213451686U
Application number: CN202021812299.8U
Authority: CN
Inventors: 刘欣; 刘丽霞
Original assignee: Wuhan Xinzhi Sealing Technology Co ltd
Current assignee: Wuhan Xinzhi Sealing Technology Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-06-15
Anticipated expiration: 2030-08-26

Abstract

The utility model provides a clamp fixed type wave-shaped anti-deflection sealing device, which is arranged between a rotating shaft and a box body and comprises a pressing block, a fixing bolt, a clamp, an elastic support ring, a fixing step, a wave-shaped elastic connecting ring, a dust-proof lip and more than one sealing lip, wherein the fixing step is attached to and fixed on the side wall of the box body, the pressing block covers the fixing step, and the fixing step is fixed on the box body through the fixing bolt; the wave form elasticity go-between is located the left end of elastic support ring, and the cross-section of wave form elasticity go-between is the wavy structure of "S" type, and the outside of wave form elasticity go-between is provided with the clamp mounting groove, and seal lip and dust lip are located the most inboard of wave form elasticity go-between. The device can carry out better sealing to the cavity that contains lubricating grease between rotation axis and the box, can also deal with the axial beat and the radial beat that the rotatory in-process of rotation axis appears simultaneously, guarantees the sealed effect under the beat operating mode.

Description

Clamp-fixed type wave-shaped anti-deflection sealing device

Technical Field

The utility model provides a sealing device especially provides an anti beat sealing device of wave form that is arranged in the gear box hole to seal and have anti beat function to the hole, belongs to mechanical seal technical field.

Background

The labyrinth seal is a device which is provided with a plurality of annular seal teeth arranged in sequence around a rotating shaft, a series of cut-off gaps and expansion cavities are formed between the teeth, and the purpose of leakage resistance is achieved by the throttling effect generated when the 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 rotating shaft is not manufactured and installed normally, roundness deviation or concentricity deviation exists, or due to a specific rotating mode, the rotating shaft can 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, a clamp fixed type wave form anti-deflection sealing device is provided, the device can carry out better sealing to the cavity that contains lubricating grease between rotation axis and the box, can also deal with the axial deflection and the radial deflection that appear in the rotatory in-process of rotation axis simultaneously, guarantees the sealed effect under the deflection operating mode.

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

a clamp fixing type wave-shaped anti-deflection sealing device is arranged between a rotating shaft and a box body, the rotating shaft is arranged in the box body and extends out of the box body, a gap between the interior of the box body and the rotating shaft is a sealing cavity, the clamp fixing type waveform anti-deflection sealing device comprises a pressing block, a fixing bolt, a clamp, an elastic support ring, a fixing step, a waveform elastic connecting ring, a dust-proof lip and more than one sealing lip, the elastic support ring, the fixed step, the wave-shaped elastic connecting ring, the sealing lip and the dust lip are connected and fixed into a whole, the elastic support ring is sleeved on the rotating shaft and is arranged along the axial direction of the rotating shaft, the fixed step is positioned at the right end of the elastic support ring and is arranged along the radial direction, the fixed step is attached and fixed on the side wall of the box body, the pressing block covers the fixed step, and the fixed step is fixed on the box body through a fixing bolt; waveform elasticity go-between is located the left end of elastic support ring, and the cross-section of waveform elasticity go-between is the wavy structure of "S" type, waveform elasticity go-between 'S the outside is provided with the clamp mounting groove, seal lip and dust lip are located waveform elasticity go-between' S the most inboard, wherein the dust lip is located the one side of keeping away from the seal chamber, the seal lip is located the one side of being close to the seal chamber, the inner disc top that the dust lip set up and the dust lip towards left side slope is sealed on the rotation axis and with the rotation axis contact, the seal lip sets up and the inner circle top of seal lip is sealed on the rotation axis and with the rotation axis contact towards right side slope, the clamp is installed in the clamp mounting groove and with waveform elasticity go-between, dust lip and.

And an elastic framework is arranged inside the fixed step, the elastic support ring and the wave-shaped elastic connecting ring.

Annular spring pieces are arranged inside the dust-proof lip and the sealing lip, and the sections of the spring pieces are V-shaped or 7-shaped.

Compared with the prior art, the utility model provides an anti beat horseshoe-shaped lip sealing device has following advantage: 1. the utility model discloses in the equal slope setting of seal lip and dust lip that sets up, both all with rotation axis contact seal and keep hugging closely with the rotation axis, even seal lip and dust lip produced wearing and tearing after long-term use, because seal lip and dust lip's inside is provided with the spring leaf, the spring leaf expands outwards makes seal lip and dust lip keep the state of hugging closely with the rotation axis all the time. 2. When the rotating shaft generates radial deflection and axial deflection in the rotating process, the wave-shaped elastic connecting ring with the S-shaped section and the wavy structure can generate corresponding deformation to adapt to the deflection, so that the sealing effectiveness is ensured, and the irreversible deformation of the whole sealing device is prevented.

Drawings

Fig. 1 is a schematic view of the overall structure of a band fixing type wave-shaped anti-deflection sealing device provided in embodiment 1;

fig. 2 is a schematic view of the overall structure of the band fixing type wave-shaped anti-deflection sealing device provided in embodiment 2;

in the figure: 1-box body, 2-rotating shaft, 3-sealing cavity, 4-pressing block, 5-fixing bolt, 6-clamping hoop, 7-elastic supporting ring, 8-fixing step, 9-wave elastic connecting ring, 10-dust-proof lip, 11-sealing lip, 12-clamping hoop mounting groove, 13-elastic framework and 14-spring piece.

Detailed Description

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

Example 1

The fixed anti beat sealing device of waveform of clamp that this embodiment provided's structure is shown in fig. 1, installs between rotation axis 2 and box 1, the rotation axis is installed in the box and is stretched out from the box, and the space between the inside and the rotation axis of box is sealed chamber 3, the fixed anti beat sealing device of waveform of clamp includes briquetting 4, fixing bolt 5, clamp 6, elastic support ring 7, fixed step 8, waveform elastic connecting ring 9 and dust lip 10 and seal lip 11, and wherein elastic support ring, fixed step, waveform elastic connecting ring and seal lip are connected fixedly for a whole with the dust lip, and the inside of fixed step, elastic support ring and waveform elastic connecting ring is provided with elastic skeleton 13. The elastic support ring is sleeved on the rotating shaft and arranged along the axial direction of the rotating shaft, the fixed step is positioned at the right end of the elastic support ring and arranged along the radial direction, the fixed step is attached to and fixed on the side wall of the box body, the pressing block covers the fixed step, and the fixed step is fixed on the box body through the fixing bolt; the wave form elasticity go-between is located the left end of elastic support ring, and the cross-section of wave form elasticity go-between is the wavy structure of "S" type, the outside of wave form elasticity go-between is provided with clamp mounting groove 12, seal lip and dust lip are located the most inboard of wave form elasticity go-between, wherein the dust lip is located the one side of keeping away from the seal chamber, the seal lip is located the one side that is close to the seal chamber, the inner disc top that the dust lip set up and the dust lip towards left side slope is sealed on the rotation axis and with the rotation axis contact, the seal lip sets up and the inner disc top of seal lip is sealed on the rotation axis and with the rotation axis contact towards right side slope, the inside of dust lip and seal lip is provided with the spring. The clamp is arranged in the clamp installation groove and integrally hoops the wave-shaped elastic connecting ring, the dust lip and the sealing lip on the rotating shaft.

Example 2

The structure of the band fixing type waveform anti-deflection sealing device provided by the embodiment is shown in fig. 2, and the main structure of the band fixing type waveform anti-deflection sealing device is the same as that of the embodiment 1, and the difference is that a dust lip 10 and two sealing lips 11 are arranged in the embodiment, the two sealing lips are arranged adjacently at the left and the right, a spring piece 14 with a 7-shaped section is arranged in each sealing lip, and the spring piece is partially positioned in an elastic supporting ring.

Claims

1. The utility model provides an anti beat sealing device of fixed waveform of clamp, installs between rotation axis and box, the rotation axis is installed in the box and is stretched out from the box, and the space between the box inside and the rotation axis is sealed chamber, its characterized in that: the clamp fixing type waveform anti-deflection sealing device comprises a pressing block, a fixing bolt, a clamp, an elastic support ring, a fixing step, a waveform elastic connecting ring, a dust lip and more than one sealing lip, wherein the elastic support ring, the fixing step, the waveform elastic connecting ring, the sealing lip and the dust lip are connected and fixed into a whole; waveform elasticity go-between is located the left end of elastic support ring, and the cross-section of waveform elasticity go-between is the wavy structure of "S" type, waveform elasticity go-between 'S the outside is provided with the clamp mounting groove, seal lip and dust lip are located waveform elasticity go-between' S the most inboard, wherein the dust lip is located the one side of keeping away from the seal chamber, the seal lip is located the one side of being close to the seal chamber, the inner disc top that the dust lip set up and the dust lip towards left side slope is sealed on the rotation axis and with the rotation axis contact, the seal lip sets up and the inner circle top of seal lip is sealed on the rotation axis and with the rotation axis contact towards right side slope, the clamp is installed in the clamp mounting groove and with waveform elasticity go-between, dust lip and.

2. The band-fixed waveform anti-yaw seal apparatus of claim 1, wherein: and an elastic framework is arranged inside the fixed step, the elastic support ring and the wave-shaped elastic connecting ring.

3. The band-fixed waveform anti-yaw seal apparatus of claim 1, wherein: annular spring pieces are arranged inside the dust-proof lip and the sealing lip, and the sections of the spring pieces are V-shaped or 7-shaped.