CN212959856U

CN212959856U - Labyrinth pressurized compressed air shaft sealing structure

Info

Publication number: CN212959856U
Application number: CN202021808966.5U
Authority: CN
Inventors: 陶涛
Original assignee: Jiangyin Baoli Machinery Manufacturing Co ltd
Current assignee: Jiangyin Baoli Machinery Manufacturing Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-04-13
Anticipated expiration: 2030-08-26

Abstract

The utility model discloses a shaft sealing structure for adding compressed air in a labyrinth, which comprises a rotating shaft; a rotating ring is fixed on the rotating shaft in the circumferential direction; the rotating shaft penetrates through the top of the mixing chamber and extends into the mixing chamber, and the rotating ring is embedded into a fixed ring arranged at the top of the mixing chamber. The utility model provides a shaft seal structure of labyrinth pressurized compressed air can effectually prevent that the material from spilling, is convenient for change abluent effect.

Description

Labyrinth pressurized compressed air shaft sealing structure

Technical Field

The utility model relates to a mix the machine field, especially relate to axle and use seal structure field.

Background

When the mixer is used for mixing materials, the materials are often leaked due to poor sealing performance, so that the materials are lost, and the mixer is damaged; gaps exist between a rotating shaft and a mixing chamber of a common mixer, most materials leak through the gaps, so that the materials can be effectively prevented from being exposed, and the connecting part of the rotating shaft and the mixing chamber needs to be effectively sealed; it is important that the mixer has a good shaft sealing structure.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the deficiencies in the prior art, the utility model provides a shaft seal structure of labyrinth pressurization compressed air can effectually prevent that the material from spilling, is convenient for change abluent effect.

The technical scheme is as follows: in order to achieve the above purpose, the technical scheme of the utility model is as follows:

a shaft sealing structure for labyrinth compressed air comprises a rotating shaft; a rotating ring is fixed on the rotating shaft in the circumferential direction; the rotating shaft penetrates through the top of the mixing chamber and extends into the mixing chamber, and the rotating ring is embedded into a fixed ring arranged at the top of the mixing chamber; is convenient to replace and clean.

Further, the air sealing device also comprises an air sealing part; the airtight piece is arranged around the movable ring; the lower end of the airtight piece is pressed on the fixing ring; a vent chamber is formed among the airtight piece, the movable ring and the fixed ring; avoiding the leakage of the materials.

Furthermore, a framework oil seal is annularly clamped between the inner wall of the top of the airtight piece and the side wall of the movable ring; the clamp springs are arranged on two sides of the framework oil seal, so that good sealing performance is guaranteed.

Furthermore, the inner wall of the movable ring is tightly attached to the side wall of the rotating shaft and is fixed on the rotating shaft through a screw; the movable ring is driven to rotate so as to be matched with the fixed ring.

Furthermore, a through hole is formed in the top of the mixing chamber; a mounting ring is fixedly arranged on the inner wall of the through hole in the circumferential direction; the bolt fixes the airtight piece and the fixing ring on the mounting ring in sequence, so that the stability is ensured, and the sealing effect is improved.

Furthermore, an O-shaped ring is respectively clamped between the air-tight piece and the fixing ring and between the fixing ring and the mounting ring; avoiding the leakage of the material from the gap.

Furthermore, the inner wall of the mounting ring close to the side wall of the rotating shaft is provided with a bell mouth; the gas is convenient to be introduced into the mixing cavity through the bell mouth.

Furthermore, a plurality of air distribution grooves are respectively formed in the bottom end of the movable ring and the top of the fixed ring; the gas distribution grooves on the movable ring are correspondingly staggered with the gas distribution grooves on the fixed ring; form a non-straight-through channel to avoid the leakage of the material through the channel.

Furthermore, the clearance setting between the branch gas groove on the rotating ring and the branch gas groove on the solid fixed ring, the gas of being convenient for passes through, and the material is avoided spilling through the clearance to gas impact material.

Further, the side wall of the airtight piece is provided with air holes; the gas flow enters the vent chamber through the gas holes, and the gas in the vent chamber passes through the gaps between the gas distribution grooves and is introduced into the mixing chamber through the bell mouth; avoid too much card of material to be in the junction of axis of rotation and seal structure.

Has the advantages that: the utility model has good sealing effect and can prevent the material from overflowing from the place where the rotating shaft is connected with the mixing cavity; including but not limited to the following benefits:

1) a non-straight-through channel is adopted between the movable ring and the fixed ring to introduce gas, so that the material can be prevented from leaking through the channel; the mode of introducing gas through compression can prevent materials from entering the non-straight-through channel and prevent the materials from leaking outwards;

2) therefore, the movable ring and the fixed ring are embedded in a plurality of staggered air distribution grooves, good sealing performance can be guaranteed, and the purpose of adjusting the staggered positions of the air distribution grooves by outwards or inwards moving correspondingly according to the size of the rotating shaft can be achieved.

Drawings

FIG. 1 is a view showing a seal structure for a shaft;

FIG. 2 is a view of the structure of the framework oil seal;

fig. 3 is a view showing the structure of an air flow path.

Detailed Description

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

As shown in the attached drawings: a shaft seal structure for labyrinth pressurized compressed air comprises a rotating shaft 1; a rotating ring 2 is fixed on the rotating shaft 1 in the annular direction; the axis of rotation 1 runs through in the mixing chamber top stretches into the mixing chamber, just in 2 insets the solid fixed ring 3 that set up at the mixing chamber top of rotating ring. The driving device drives the rotating shaft 1 to drive the rotating ring 2 to rotate; the movable ring 2 is embedded into the fixed ring 3 arranged at the top of the mixing chamber and is arranged in a mutual rotating way, so that a good sealing effect is achieved.

Also comprises an airtight piece 5; the airtight piece 5 is arranged around the movable ring 2; the lower end of the airtight piece 5 is pressed against the fixing ring 3; an air chamber 31 is formed among the air sealing member 5, the movable ring 2 and the fixed ring 3; the gas in the breather chamber 31 enters the mixing chamber through the gap between the movable ring 2 and the fixed ring 3, so that the material in the mixing chamber can be prevented from leaking.

A framework oil seal 6 is annularly clamped between the inner wall of the top of the airtight piece 5 and the side wall of the movable ring 2; clamp springs 61 are arranged on two sides of the framework oil seal 6; the airtight piece 5 and the movable ring 2 are isolated from the outside through the framework oil seal 6, and outside air is prevented from entering the ventilation chamber 31.

The inner wall of the movable ring 2 is tightly attached to the side wall of the rotating shaft 1 and is fixed on the rotating shaft 1 through a screw; the rotating ring 2 is fixed on the rotating shaft 1, and the rotating shaft 1 drives the rotating ring 2 to rotate; the fine and solid fixed ring cooperation of rotating ring guarantees the inside closure of hybrid chamber, avoids the material to spill over.

The top of the mixing cavity is provided with a through hole 4; a mounting ring 41 is fixedly arranged on the inner wall of the through hole 4 in the circumferential direction; the bolts sequentially fix the air-tight piece 5 and the fixing ring 3 on the mounting ring 41; thus, the airtight piece 5 and the fixed ring 3 are fixed at the through hole, and a sealing structure is formed when the movable ring 2 is embedded into the fixed ring 3; can effectively prevent the material from overflowing from the through hole and has good sealing effect.

O-shaped rings 42 are respectively clamped between the air sealing element 5 and the fixing ring 3 and between the fixing ring 3 and the mounting ring 41; gaps are possibly formed among the fixed air sealing element 5, the fixed ring 3 and the mounting ring 41, so that the O-shaped ring 42 is clamped to prevent materials from overflowing from the gaps, and the phenomenon that the materials are clamped in the gaps to influence the sealing effect is avoided.

The inner wall of the mounting ring 41 close to the side wall of the rotating shaft 1 is provided with a bell mouth 43, and the introduced gas passes through the bell mouth 43, so that the compressed gas can be conveniently introduced into the mixing chamber.

The bottom end of the movable ring 2 and the top of the fixed ring 3 are respectively provided with a plurality of air distribution grooves 21; the gas distribution grooves 21 on the movable ring 2 correspond to the gas distribution grooves 21 staggered on the fixed ring 3; the side walls of the gas distribution grooves 21 are mutually embedded and staggered; when the rotating shaft 1 is enlarged, the air distribution groove 21 on the fixed ring 3 moves outwards relative to the air distribution groove 21 on the moving ring 2 and is embedded into the air distribution groove on the outer side of the moving ring 2; similarly, when the rotating shaft 1 is reduced, the air distribution groove 21 on the fixed ring 3 moves inwards relative to the air distribution groove 21 on the moving ring 2 and is embedded into the air distribution groove on the inner side of the moving ring 2; therefore, the staggered positions of the air distributing grooves of the movable ring 2 and the fixed ring 3 can be adjusted according to the size of the rotating shaft 1.

The air distribution groove 21 on the movable ring 2 and the air distribution groove 21 on the fixed ring 3 are arranged in a clearance way; the formed gap is of a bent channel type, and materials can be prevented from directly overflowing through the gap.

The side wall of the airtight piece 5 is provided with an air hole 51; the gas flow enters the aeration chamber 31 through the gas holes 51, and the gas in the aeration chamber 31 passes through the gap between the gas distribution grooves 21 and enters the mixing chamber through the bell mouth 43; the gas is in a single flow direction, so that the leakage of the materials in the mixing chamber from a closed position can be avoided, and the materials clamped at the closed position are impacted back into the mixing chamber by adopting a mode of introducing compressed air into a labyrinth type bent channel; the material card of avoiding that can be fine is in sealed mouth department, prevents that the material from spilling over from sealed mouth department.

When the movable ring needs to be replaced and cleaned, only the bolts on the movable ring and used for fixing the air-tight piece and the fixed ring need to be loosened, then the movable ring, the air-tight piece and the fixed ring are taken down for replacement or cleaning, and meanwhile, the bell mouth can also be cleaned; the operation is convenient.

The above description is of the preferred embodiment of the present invention, and it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the principles of the invention, and these modifications and variations are considered to be within the scope of the invention.

Claims

1. A labyrinth compressed air shaft seal structure is characterized in that: comprises a rotating shaft (1); a rotating ring (2) is fixed on the rotating shaft (1) in the circumferential direction; the rotating shaft (1) penetrates through the top of the mixing chamber and extends into the mixing chamber, and the rotating ring (2) is embedded into the fixing ring (3) arranged at the top of the mixing chamber.

2. The seal structure for a labyrinth compressed air shaft according to claim 1, wherein: also comprises an airtight piece (5); the airtight piece (5) is arranged around the movable ring (2); the lower end of the airtight piece (5) is pressed against the fixed ring (3); and a ventilation chamber (31) is formed among the airtight piece (5), the movable ring (2) and the fixed ring (3).

3. The seal structure for a labyrinth compressed air shaft according to claim 2, wherein: a framework oil seal (6) is clamped between the inner wall of the top of the airtight piece (5) and the side wall of the movable ring (2) in the circumferential direction; and clamp springs (61) are arranged on two sides of the framework oil seal (6).

4. The seal structure for a labyrinth compressed air shaft according to claim 1, wherein: the inner wall of the movable ring (2) is tightly attached to the side wall of the rotating shaft (1) and is fixed on the rotating shaft (1) through a screw.

5. The seal structure for a labyrinth compressed air shaft according to claim 1, wherein: the top of the mixing cavity is provided with a through hole (4); a mounting ring (41) is fixedly arranged on the inner wall of the through hole (4) in the circumferential direction; the bolt fixes the air-tight piece (5) and the fixing ring (3) on the mounting ring (41) in sequence.

6. The seal structure for a labyrinth compressed air shaft according to claim 5, wherein: o-shaped rings (42) are respectively clamped between the air sealing element (5) and the fixing ring (3) and between the fixing ring (3) and the mounting ring (41).

7. The seal structure for a labyrinth compressed air shaft according to claim 5, wherein: the inner wall of the mounting ring (41) close to the side wall of the rotating shaft (1) is provided with a bell mouth (43).

8. The seal structure for a labyrinth compressed air shaft according to claim 1, wherein: the bottom end of the movable ring (2) and the top of the fixed ring (3) are respectively provided with a plurality of air distribution grooves (21); the gas distribution grooves (21) on the movable ring (2) are correspondingly staggered on the gas distribution grooves (21) on the fixed ring (3).

9. The seal structure for a labyrinth compressed air shaft as claimed in claim 8, wherein: the gap between the gas distribution groove (21) on the movable ring (2) and the gas distribution groove (21) on the fixed ring (3) is arranged.

10. The seal structure for a labyrinth compressed air shaft as claimed in claim 9, wherein: the side wall of the airtight piece (5) is provided with an air hole (51); the gas flow enters the breather chamber (31) through the gas holes (51), and the gas in the breather chamber (31) passes through the gaps between the gas distribution grooves (21) and is introduced into the mixing cavity through the bell mouth (43).