CN217207736U

CN217207736U - Rotating shaft air sealing structure

Info

Publication number: CN217207736U
Application number: CN202220223123.1U
Authority: CN
Inventors: 周绍植; 朱伟海
Original assignee: Shanghai Tangdi Machinery Manufacturing Co ltd
Current assignee: Shanghai Tangdi Machinery Manufacturing Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-08-16
Anticipated expiration: 2032-01-26

Abstract

The utility model relates to a pivot air-tight seal structure relates to the field of transmission shaft sealing technique, and it establishes the cyclic annular base member on the main shaft including the cover, is provided with the sealing washer respectively at the both ends of the inside wall of base member, is formed with the air seal groove between the sealing washer, runs through the inlet port of seting up intercommunication base member outside and air seal groove on the lateral wall of base member. This application is when using, lets in the invariable compressed air of pressure in to the seal groove from the inlet port department, and compressed air forms the air film between sealing washer and main shaft, and the clearance between main shaft and the sealing washer can be sealed to the air film, improves sealing performance.

Description

Rotating shaft air sealing structure

Technical Field

The application relates to the field of transmission shaft sealing technology, in particular to a rotating shaft air sealing structure.

Background

When food is produced, food of powder needs to be put into a stirrer for mixing, and a large amount of dust is generated during stirring of the powder. The mixer includes motor, main shaft and stirring paddle leaf, and stirring paddle leaf fixes on the main shaft, rotates through motor drive pivot and stirs, and the gap that main shaft department can be followed to the dust in the stirring process outwards leaks, need seal for this reason.

In the correlation technique, usually adopt the sealing washer to seal, nevertheless can produce a large amount of dusts in the stirring process, and the dust enters into the sealing washer and can aggravate the wearing and tearing of sealing washer, uses after a period, and the dust still can be followed the sealing washer and leaked outward. Therefore, the inventor provides a rotary shaft air sealing structure.

SUMMERY OF THE UTILITY MODEL

In order to prevent the leakage at the main shaft, the application provides a rotating shaft air sealing structure which has the advantages of simple structure and excellent sealing effect.

The application provides a pivot gas seal structure adopts following technical scheme:

the utility model provides a pivot gas seal structure, establishes at the epaxial annular base member of main axle including the cover the both ends of the inside wall of base member are provided with the sealing washer respectively, be formed with the gas seal groove between the sealing washer run through on the lateral wall of base member and seted up the intercommunication the base member outside with the inlet port in gas seal groove.

Through adopting above-mentioned technical scheme, set up the sealing washer at the both ends of base member inside wall and set up the inlet port that communicates outside and atmoseal groove on the base member, when using, fill into the compressed air of constant pressure to atmoseal inslot from the inlet port, compressed air can form the one deck air film on main shaft surface and sealing washer surface, can prevent that the dust of high efficiency from leaking between main shaft and sealing washer.

Optionally, an inner sealing portion is arranged on the sealing ring, the inner sealing portion is an annular protrusion extending towards the inner side of the sealing ring, and the inner sealing portion inclines towards the air sealing groove.

Through adopting above-mentioned technical scheme, set up interior sealing on the sealing washer, after filling compressed air in the atmoseal inslot, interior sealing can strut to both sides under the effect of atmospheric pressure, makes the edge of interior sealing support tightly on the main shaft, further improves sealed effect.

Optionally, an outer sealing portion is further arranged on the sealing ring, the outer sealing portion is an annular protrusion extending towards the inner side of the sealing ring, the outer sealing portion inclines towards one side of the air sealing groove, and the outer sealing portion is located on one side, far away from the air sealing groove, of the inner sealing portion.

Through adopting above-mentioned technical scheme, set up the external seal portion on the seal ring, in the use, the external seal portion that is close to stirring paddle leaf one side can block the dust that part stirring produced, and the external seal portion that is located the mixer outside can block external dust and dirty, can further improve overall structure's sealing performance.

It is optional, the base member includes annular casing, annular gas ring and annular apron, run through on the casing and offer and be used for the installation the mounting hole of gas ring, the sealing washer sets up the both sides of gas ring, the hole bottom structure of mounting hole is the butt portion of sealing washer, the apron is installed the casing is kept away from the one end of butt portion, the gas ring both sides the sealing washer is the centre gripping respectively and is installed butt portion with between the gas ring with between the apron, the inlet port is seted up on the lateral wall of casing, correspond on the lateral wall of gas ring the air inlet annular has been seted up to the position of inlet port, seted up the intercommunication on the gas ring the air inlet annular with the air vent in gas seal groove.

By adopting the technical scheme, the shell, the gas ring and the cover plate are arranged, when the gas ring and the sealing ring are installed, the installation can be finished only by sequentially installing the gas ring and the sealing ring into the shell and then covering the cover plate, and the structure is simple and the installation is convenient; simultaneously, set up air inlet ring groove and air vent on the lateral wall of air ring, in normal use, the air ring can probably be rotated by main shaft drive, and air inlet hole and air vent probably have the condition of unable alignment to lead to unable compressed air that lets in, and the air inlet ring groove can make compressed air encircle the air ring round, and the air vent rotates all to let in compressed air to arbitrary position.

Optionally, the vent hole is opened along the circumference of the air ring in a plurality.

By adopting the technical scheme, the plurality of vent holes are formed in the peripheral side of the air ring, so that pressurized air can enter the air seal groove from the peripheral side of the air ring, the air pressure in the air seal groove can be stabilized better, and the sealing performance is improved.

Optionally, one side that is close to on the sealing washer the gas ring extends and is provided with first joint arch up, the both ends of gas ring extend to both sides and are provided with the second joint arch, first joint arch is hung and is established on the second joint arch.

Through adopting above-mentioned technical scheme, it is protruding to set up first joint on the sealing washer, sets up the second joint arch at the gas ring both ends, and when the installation, first joint arch on the sealing washer is hung and is established on the second joint is protruding, can make the stable difficult drop that drops of sealing washer installation.

Optionally, a limiting protrusion which is matched with the mounting hole in an inserted manner is coaxially and integrally arranged on the cover plate.

Through adopting above-mentioned technical scheme, set up spacing arch on the apron, the apron can insert through spacing arch and establish in the mounting hole and fix a position when the installation, and the prevention apron is not coaxial with the mounting hole.

Optionally, an air pipe joint is fixed at one end of the air inlet hole, which is far away from the sealing ring.

Through adopting above-mentioned technical scheme, installation air pipe connector can conveniently let in compressed air on the inlet port.

In summary, the present application includes at least one of the following beneficial technical effects:

the sealing rings are arranged at the two ends of the inner wall of the base body, and the air inlet holes are formed in the side wall of the base body, so that compressed air with constant pressure is introduced from the air inlet holes during normal use, an air film can be formed on the surfaces of the sealing rings and the main shaft by the compressed air, the air film can more efficiently seal a gap between the sealing rings and the main shaft, and dust leakage is prevented;

the inner sealing part which is inclined towards one side of the air sealing groove is arranged on the sealing ring, compressed air is filled into the air sealing groove in the using process, the inner sealing part is propped open towards two sides under the action of air pressure, and the end part of the inner sealing part is pressed against the main shaft by air pressure, so that the sealing performance can be effectively improved;

through setting up the external seal portion on the seal ring, when using, the laminating of external seal portion is on the main shaft and the tip inclines towards the one side of keeping away from the atmoseal groove, and the external seal portion that is close to stirring paddle leaf one side can effectively block the dust in the mixer, and the external seal of keeping away from stirring paddle leaf one side can the outside dust impurity of separation get into the mixer to further improve overall structure's sealing performance.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

fig. 2 is a partially enlarged view of the area a in fig. 1.

Reference numerals: 1. a main shaft; 21. a housing; 211. mounting holes; 212. an abutting portion; 213. an air inlet; 22. a gas ring; 221. an air inlet ring groove; 222. a vent hole; 223. a second clamping bulge; 23. a cover plate; 231. a limiting bulge; 3. a seal ring; 31. a first clamping protrusion; 32. an inner seal portion; 33. an outer seal portion; 4. a gas seal groove; 5. a gas pipe joint.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses pivot gas seal structure, refer to fig. 1, install on the main shaft 1 of mixer for the clearance between sealed main shaft 1 and the mixer lateral wall, including the base member of cover setting on main shaft 1 and install sealing washer 3 on the base member inside wall. The sealing rings 3 are provided with two ends respectively positioned on the base body, an air seal groove 4 is formed between the two sealing rings 3, and an air inlet hole 213 used for filling compressed air into the air seal groove 4 is formed on the side wall of the base body.

Referring to fig. 1 and 2, the base includes an annular housing 21, a mounting hole 211 is coaxially formed on the housing 21, and an air inlet hole 213 is formed on a side wall of the housing 21; an annular air ring 22 is arranged in the mounting hole 211, the air ring 22 is sleeved on the main shaft 1, and the outer side wall of the air ring 22 is in sliding fit with the mounting hole 211; a contact portion 212 that contacts the seal ring 3 is formed at the bottom of the mounting hole 211; the seal rings 3 are attached to both sides of the air ring 22, and the seal ring 3 on the air ring 22 side abuts against the lower portion. A cover plate 23 is fixed on one end of the shell 21 far away from the abutting part 212 through a bolt, the cover plate 23 is an annular plate body, and the cover plate 23 is sleeved on the main shaft 1; the cover plate 23 has a limiting protrusion 231 extending towards the mounting hole 211 corresponding to the mounting hole 211, the limiting protrusion 231 is inserted into the mounting hole 211 and abuts against the sealing ring 3 on the corresponding side.

An air inlet ring groove 221 is formed in the position, corresponding to the air inlet hole 213, on the outer side wall of the air ring 22, and the width of the air inlet ring groove 221 is larger than the diameter of the air inlet hole 213; the bottom of the air inlet ring groove 221 is provided with two vent holes 222 in a penetrating manner, and the two vent holes 222 are uniformly distributed along the circumferential direction of the air ring 22. One side of keeping away from main shaft 1 at sealing washer 3 extends towards gas ring 22 and is provided with first joint arch 31, and one side that gas ring 22 is close to main shaft 1 extends to both sides and is provided with the protruding 223 of second joint, and sealing washer 3 is hung through first joint arch 31 and is established on the protruding 223 of second joint, can prevent that sealing washer 3 from taking place to drop in the use.

An inner sealing part 32 extends inwards from one side of the sealing ring 3 close to the main shaft 1, the inner sealing part 32 is an annular sealing bulge, one end of the inner sealing part 32 close to the main shaft 1 is obliquely arranged towards one side of the air ring 22, and an air sealing groove 4 is formed between the inner sealing parts 32 of the two sealing rings 3. When compressed air with constant pressure is filled in the air seal groove 4, the inner sealing part 32 is opened to two sides by air pressure, so that one end of the inner sealing part 32 close to the main shaft 1 is pressed on the main shaft 1, and the sealing performance is improved.

An outer sealing part 33 extends inwards from one side of the sealing ring 3 close to the main shaft 1, the outer sealing part 33 is a circular sealing bulge, the outer sealing bulge is positioned on one side of the inner sealing part 32 far away from the air sealing groove 4, and the outer sealing part 33 inclines towards one side far away from the air sealing groove 4. During use, the outer sealing portion 33 is inclined towards the outside to effectively block the entrance of external dust.

An air pipe joint 5 is also fixed on the air inlet hole 213 of the shell 21 by screw threads, so that compressed air can be conveniently communicated.

The implementation principle of the rotating shaft air sealing structure disclosed by the embodiment of the application is as follows: two sealing rings 3 are arranged in a shell 21, an air seal groove 4 is formed between the two sealing rings 3, and compressed air with constant air pressure is introduced into the air seal groove 4, so that a layer of air film can be formed between the main shaft 1 and the sealing rings 3 by the compressed air, the air film can more efficiently seal a gap between the main shaft 1 and the sealing rings 3, and dust leakage in the stirrer is prevented; meanwhile, external dust and dirt can be prevented from entering the stirrer, and food sanitation can be improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a pivot gas seal structure which characterized in that: including the cover establish the annular base member on main shaft (1) the both ends of the inside wall of base member are provided with sealing washer (3) respectively, be formed with air seal groove (4) between sealing washer (3) run through on the lateral wall of base member and seted up the intercommunication the base member outside with air inlet hole (213) in air seal groove (4).

2. The hermetic sealing structure for the rotating shaft according to claim 1, wherein: be provided with interior sealing (32) on sealing washer (3), interior sealing (32) are for the orientation the annular protrusion that sealing washer (3) inboard was extended, interior sealing (32) orientation atmoseal groove (4) slope.

3. The hermetic sealing structure for the rotating shaft according to claim 2, wherein: still be provided with external seal portion (33) on sealing washer (3), external seal portion (33) are the orientation the annular bulge of sealing washer (3) inboard extension, external seal portion (33) orientation one side slope of atmoseal groove (4), external seal portion (33) are located interior seal portion (32) are kept away from one side of atmoseal groove (4).

4. The hermetic sealing structure for the rotating shaft according to claim 1, wherein: the base member includes annular casing (21), annular air ring (22) and annular apron (23), run through on casing (21) and offer and be used for the installation mounting hole (211) of air ring (22), sealing washer (3) set up the both sides of air ring (22), the hole bottom structure of mounting hole (211) is the butt portion (212) of sealing washer (3), install apron (23) casing (21) is kept away from the one end of butt portion (212), sealing washer (3) the centre gripping respectively of air ring (22) both sides is installed butt portion (212) with between air ring (22), air ring (22) with between apron (23), inlet port (213) are seted up on the lateral wall of casing (21), air ring (22) correspond on the lateral wall the position of inlet port (213) has seted up air inlet ring groove (221), the air ring (22) is provided with a vent hole (222) for communicating the air inlet ring groove (221) with the air seal groove (4).

5. The hermetic sealing structure for the rotating shaft according to claim 4, wherein: the plurality of vent holes (222) are formed along the circumferential direction of the air ring (22).

6. The hermetic sealing structure for the rotating shaft according to claim 4, wherein: be close to on sealing washer (3) one side of gas ring (22) up gas ring (22) extend and are provided with first joint arch (31), the both ends of gas ring (22) are extended to both sides and are provided with the protruding (223) of second joint, first joint arch (31) are hung and are established on the protruding (223) of second joint.

7. The hermetic sealing structure for the rotating shaft according to claim 4, wherein: the cover plate (23) is provided with a limiting protrusion (231) which is inserted into the mounting hole (211) and matched with the mounting hole, and the limiting protrusion (231) is inserted into the mounting hole (211).

8. The hermetic sealing structure for the rotating shaft according to claim 1, wherein: and an air pipe joint (5) is fixed at one end of the air inlet hole (213) far away from the sealing ring (3).