CN211778979U

CN211778979U - Anti-deflection multi-lip sealing device for ball mill

Info

Publication number: CN211778979U
Application number: CN201922399655.1U
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: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-27
Anticipated expiration: 2029-12-27

Abstract

The utility model provides an anti-deflection multi-lip sealing device used in a ball mill, which consists of a movable ring and a static ring, wherein the movable ring comprises an inner movable ring, an outer movable ring and a support ring, the inner movable ring and the support ring are arranged along the axial direction, the inner circumference of the support ring is fixedly connected with the outer circumference of a rotating shaft, and one end of the inner movable ring and one end of the outer movable ring are both fixed on the support ring; the section of the static ring is in an inverted L shape and comprises a sealing ring arranged along the axial direction and a connecting ring arranged along the radial direction, the connecting ring is attached to and fixed on the box body, the left end of the sealing ring is provided with a sealing lip with an X-shaped section, and the sealing lip is positioned between the inner rotating ring and the outer rotating ring and is in close contact sealing with the outer circumference of the inner rotating ring and the inner circumference of the outer rotating ring. 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 ball mill

Technical Field

The utility model provides a sealing device especially provides a sealing device that is arranged in ball mill to seal the pivot and has anti beat function, 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 manufacturing and installation of the rotating shaft are not standard or due to a specific rotating mode, the rotating shaft may have large-amplitude deflection in the radial direction in the rotating process, and under the condition, the traditional labyrinth sealing device cannot be used, so that not only the sealing effect cannot be achieved, but also the damage between the movable ring and the fixed ring may be caused. 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 anti beat multi-lip sealing device for in ball mill, 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 appear in the rotatory in-process of rotation axis 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 anti-deflection multi-lip sealing device for the ball mill 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 anti-deflection multi-lip sealing device for the ball mill consists of a movable ring and a static ring, the movable ring comprises an inner movable ring, an outer movable ring and a support ring, the inner movable ring and the outer movable ring are axially arranged, the support ring is radially arranged, the inner circumference of the support ring is fixedly connected with the outer circumference of the rotating shaft, two annular clamping grooves are formed in the side wall of the support ring, the inner ring and the outer movable ring are internally and externally arranged, one ends of the inner movable ring and one ends of the outer movable ring are both arranged in the annular clamping grooves;

the cross-section of quiet ring is anti-L style of calligraphy, comprises the sealing ring that sets up along the axial and the go-between that radially sets up, and the go-between pastes and leans on the box lateral wall, and the go-between passes through clamp plate and bolt fastening on the box, and the right-hand member of sealing ring and the interior circumference fixed connection of go-between and both are fixed as an organic whole, and the left end of sealing ring is provided with the seal lip that the cross-section is the X type, the seal lip is located between interior rotating ring and the outer rotating ring, and with the outer circumference of interior rotating ring and the interior circumference in close.

The inner circumference of the support ring is provided with a connecting step extending along the axial direction, the connecting step is sleeved on the outer surface of the rotating shaft, through holes are distributed on the connecting step along the circumferential direction, threaded holes are formed in the rotating shaft at positions corresponding to the through holes, and bolts penetrate through the through holes and are screwed into the threaded holes to fix the support ring and the rotating shaft.

The static ring is internally provided with a framework which is made of metal materials and has the same reverse L-shaped cross section.

An annular spring leaf with a V-shaped section is fixed in the sealing lip, and the spring leaf expands outwards to keep the sealing lip in a close contact state with the outer moving ring and the inner moving ring.

Compared with the prior art, the utility model provides an anti beat many lips sealing device for among ball mill 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 rotating shaft generates axial deflection in the rotating process, the static ring is axially fixed; the rotating shaft is fixed with the rotating ring, so that the rotating ring can swing in the axial direction along with the rotating shaft, the sealing lip slides in the axial direction relative to the rotating ring, and the sealing lip on the static ring is in contact sealing with the rotating ring at any time in the moving process, so that the axial deflection is responded. 3. When the rotation axis radial beat appeared in rotatory in-process, the rotating ring can the centre gripping seal lip carry out radial beat together, and the right half of sealing ring should radial beat through warping this moment, and the metal framework that 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 overall structure diagram of an anti-deflection multi-lip sealing device for a ball mill according to the present invention;

in the figure: the device comprises a box body 1, a rotating shaft 2, a sealing cavity 3, an inner movable ring 4, an outer movable ring 5, a support ring 6, a jackscrew 7, an annular clamping groove 8, a sealing ring 9, a connecting ring 10, a pressing plate 11, a bolt 12, a sealing lip 13, a connecting step 14, a framework 15 and a spring piece 16.

Detailed Description

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

The overall structure of the deflection-resisting multi-lip sealing device for the ball mill provided by the utility model is shown in figure 1, the rotating shaft 2 is arranged in the box body 1 and extends out of the box body, a gap between the inside of the box body and the rotating shaft is a sealed cavity 3, the anti-deflection multi-lip sealing device used in the ball mill consists of a movable ring and a static ring, wherein the movable ring comprises an inner movable ring 4 and an outer movable ring 5 which are arranged along the axial direction and a supporting ring 6 which is arranged along the radial direction, the inner circumference of the support ring is fixedly connected with the outer circumference of the rotating shaft, the inner circumference of the support ring is provided with a connecting step 14 extending along the axial direction, the connecting step is sleeved on the outer surface of the rotating shaft, and through holes are distributed on the connecting step along the circumferential direction, threaded holes are formed in the positions, corresponding to the through holes, of the rotating shaft, and the bolts 12 penetrate through the through holes and are screwed into the threaded holes to fix the support ring and the rotating shaft. Two annular clamping grooves 8 which are arranged inside and outside are formed in the side wall of the support ring, one ends of the inner movable ring and the outer movable ring are arranged in the annular clamping grooves in the support ring, and the inner movable ring and the outer movable ring are fixed on the support ring through jackscrews 7.

The section of the static ring is reverse L-shaped, and the static ring is composed of a sealing ring 9 arranged along the axial direction and a connecting ring 10 arranged along the radial direction, and a framework 15 which is made of metal materials and has the reverse L-shaped section is arranged in the static ring. The connecting ring is attached to the side wall of the box body and fixed to the box body through the pressing plate 11 and the bolts 12, the right end of the sealing ring is fixedly connected with the inner circumference of the connecting ring and fixed to the inner circumference of the connecting ring, and a sealing lip 13 with an X-shaped cross section is arranged at the left end of the sealing ring and located between the inner rotating ring and the outer rotating ring and in close contact sealing with the outer circumference of the inner rotating ring and the inner circumference of the outer rotating ring. An annular spring piece 16 with a V-shaped section is fixed in the sealing lip, and 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. Even under the working condition of deflection rotation, the spring piece can also enable the sealing lip to keep sealing with the outer rotating ring and the inner rotating ring.

When the rotating shaft generates axial deflection in the rotating process in the working process, the static ring is axially fixed; the rotating shaft is fixed with the rotating ring, so that the rotating ring can swing in the axial direction along with the rotating shaft, the sealing lip slides in the axial direction relative to the rotating ring, and the sealing lip on the static ring is in contact sealing with the rotating ring at any time in the moving process, so that the axial deflection is responded. When the rotation axis radial beat appeared in rotatory in-process, the rotating ring can the centre gripping seal lip carry out radial beat together, and the right half of sealing ring should radial beat through warping this moment, and the metal framework that sets up in the quiet ring can strengthen the pliability and the elasticity of quiet ring.

Claims

1. The utility model provides an anti beat multi-lip sealing device for among ball mill, installs between rotation axis and box, the rotation axis is installed in the box and stretches out in the box, and the space between the inside and rotation axis of box is sealed chamber, its characterized in that: the anti-deflection multi-lip sealing device for the ball mill comprises a movable ring and a stationary ring, wherein the movable ring comprises an inner movable ring, an outer movable ring and a support ring, the inner movable ring and the outer movable ring are arranged along the axial direction, the support ring is arranged along the radial direction, the inner circumference of the support ring is fixedly connected with the outer circumference of a rotating shaft, two annular clamping grooves which are arranged inside and outside are arranged on the side wall of the support ring, one ends of the inner movable ring and the outer movable ring are both arranged in the annular clamping grooves on the support ring, and the inner movable ring and the outer movable ring are fixed on the support ring through;

2. The anti-run-out multi-lip seal for use in a ball mill according to claim 1, wherein: the inner circumference of the support ring is provided with a connecting step extending along the axial direction, the connecting step is sleeved on the outer surface of the rotating shaft, through holes are distributed on the connecting step along the circumferential direction, threaded holes are formed in the rotating shaft at positions corresponding to the through holes, and bolts penetrate through the through holes and are screwed into the threaded holes to fix the support ring and the rotating shaft.

3. The anti-run-out multi-lip seal for use in a ball mill according to claim 1, wherein: the static ring is internally provided with a framework which is made of metal materials and has the same reverse L-shaped cross section.

4. The anti-run-out multi-lip seal for use in a ball mill according to claim 1, wherein: an annular spring leaf with a V-shaped section is fixed in the sealing lip, and the spring leaf expands outwards to keep the sealing lip in a close contact state with the outer moving ring and the inner moving ring.