CN209977254U

CN209977254U - Mechanical sealing element

Info

Publication number: CN209977254U
Application number: CN201920848887.8U
Authority: CN
Inventors: 李隆璋; 胡方斌
Original assignee: Wenzhou Heavy Machinery Equipment Co Ltd
Current assignee: Wenzhou Heavy Machinery Equipment Co Ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-01-21
Anticipated expiration: 2029-06-06

Abstract

The utility model relates to a sealing element field, in particular to a mechanical sealing element, including casing, seal chamber, seal box seat, seal box cover and be used for cooperating the axle sleeve of installation transmission shaft, seal box cover installation position is in seal chamber's upper end, is equipped with cavity O shape circle between seal box cover and the seal chamber, installs the end cap on the seal box cover, seal box seat installation position in seal chamber's lower extreme, and seal box seat and axle sleeve between form one and hold the chamber, hold the chamber on have coolant liquid passageway, coolant liquid passageway arranges and holds the intracavity in, seal box seat left and right sides both ends seted up coolant liquid import and coolant liquid export; and a plurality of annular grooves are formed on the contact surface of the sealing box seat and the transmission shaft. The annular groove is positioned at the lower end of the static ring sealing component. The cooling area of the shaft sleeve contact surface on the seal box seat is increased, and the cooling efficiency of the transmission shaft and the dynamic and static ring seal assembly is effectively improved.

Description

Mechanical sealing element

Technical Field

The utility model relates to a sealing member field, in particular to mechanical seal.

Background

The mechanical seal is an oil seal device of a rotary machine, such as a centrifugal pump, a centrifuge, a reaction kettle, a compressor and the like. Since the drive shaft penetrates inside and outside the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks to the outside, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device for preventing leakage is necessary. The mechanical seal is a main shaft seal of the above-mentioned devices because the mechanical seal has advantages of a small leakage amount, a long life, and the like. The mechanical seal is a rotary transmission shaft dynamic seal and is divided into a contact type and a non-contact type.

At present, the majority adopts contact mechanical seal, but, current contact mechanical seal is consuming time to the cooling of transmission shaft in the in-service use process, can not effectively cool off rotating ring seal assembly and quiet ring seal assembly's friction position simultaneously, will cause the sound ring overheated like this, causes whole mechanical seal to damage, causes the problem of leakage, to these problems, the utility model provides an improve.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a detect bottle lid wrong tooth structure.

The utility model adopts the technical proposal that: a mechanical sealing element comprises a shell, a sealing cavity, a sealing box seat, a sealing box cover and a shaft sleeve used for being matched with and installing a transmission shaft, wherein the sealing box cover is arranged at the upper end of the sealing cavity; in order to effectively accelerate the cooling efficiency of the transmission shaft and the dynamic and static ring sealing assembly, the contact surface of the sealing box seat and the transmission shaft is provided with a plurality of annular grooves, so that the cooling area of the contact surface of the shaft sleeve on the sealing box seat is increased, and the annular grooves are positioned at the lower end of the static ring sealing assembly.

Preferably, the shaft sleeve is a cylindrical hollow body, the sealing box seat is provided with annular grooves in the vertical direction, the annular grooves are abutted to the shaft sleeve, the number of the annular grooves is 6-12, and the annular grooves are uniformly arranged on the sealing box seat, so that uniform heat dissipation is realized, and a quick heat dissipation effect is achieved.

Preferably, the seal cavity is provided with a static seal assembly and a moving ring seal assembly, the static seal assembly and the moving ring seal assembly are arranged between the shaft sleeve and the seal cavity, the static seal assembly comprises an upper static ring, a lower static ring, an upper static ring O-shaped ring and a lower static ring seal ring, an inner groove is formed at the joint of the seal cavity and the seal base, the lower static ring is arranged on the inner groove between the seal cavity and the seal base, and the lower static ring is sleeved with the lower static ring seal ring; go up quiet ring setting in the junction of sealed case lid and cavity, just last quiet ring on be equipped with quiet ring O shape circle, mechanical seal passes through static seal assembly and the closed cooperation of rotating ring seal assembly, rotating ring seal assembly rotates along with the transmission shaft, quiet ring seal assembly is fixed on mechanical seal, mechanical seal passes through static seal assembly and the closed cooperation of rotating ring seal assembly, has improved the leakproofness greatly.

Preferably, the upper stationary ring is mounted on the seal box cover through a cylindrical pin.

Preferably, the movable ring sealing assembly is provided with an upper movable ring and an O-shaped ring of the upper movable ring, the upper movable ring is arranged below the lower stationary ring, the O-shaped ring of the upper movable ring is sleeved on the upper movable ring, and the upper movable ring is arranged between the shaft sleeve and the sealing cavity through an inner hexagonal set screw; the lower end of the upper moving ring is provided with a spring seat, a push ring and an elastic piece are arranged between the spring seat and the upper moving ring, the push ring is positioned between the upper moving ring and the spring seat, and the upper end and the lower end of the elastic piece are respectively pressed against the push ring and the spring seat.

Preferably, the lower end of the spring seat is provided with an installation seat and a metal corrugated pipe, the metal corrugated pipe is installed between the lower static ring and the spring seat, and the metal corrugated pipe is fixed on the installation seat through threaded connection.

Preferably, the upper end of the sealing box cover is provided with a bearing gland, the bearing gland is provided with a framework oil seal, and the framework oil seal is positioned in the bearing gland; the bearing gland and the sealing box cover are provided with bearings matched with the shaft sleeve, and the abutting part of the bearings and the bearing gland is provided with an elastic retainer ring for the shaft.

Preferably, a lifting ring is arranged on the end face of one end of the bearing gland, the lifting ring is installed on the bearing gland through threaded connection, and a first spring washer is sleeved on the lifting ring; the other end of the bearing gland is provided with a long bolt which passes through the bearing gland to be fixed on the sealing box seat, and a second elastic gasket is arranged between the bolt and the bearing gland.

Preferably, the shaft sleeve penetrates through the whole sealing cavity, the top end of the shaft sleeve is provided with a shaft sleeve gland, and the shaft sleeve gland is installed on the shaft sleeve through the installation assembly.

To sum up, the utility model discloses beneficial effect does:

1. the sealed case seat contact surface with the transmission shaft on seted up a plurality of annular groove, annular groove be located quiet ring seal subassembly lower extreme, increased the cooling area of axle sleeve contact surface on the sealed case seat like this, effectively accelerated transmission shaft and sound ring seal subassembly's cooling efficiency.

2. The annular grooves are uniformly arranged on the sealing box seat, so that uniform heat dissipation is realized, and a quick heat dissipation effect is achieved.

3. The sealing cavity is provided with a static sealing component and a moving ring sealing component, and the mechanical sealing element is tightly matched with the moving ring sealing component through the static sealing component, so that the overall sealing performance of the mechanical sealing element is greatly improved.

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

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is a top view of the sealing box seat structure in the utility model.

The labels in the figure are: the bearing comprises a shaft sleeve gland 1, an inner hexagonal screw 2, a shaft sleeve O-shaped ring 3, a shaft sleeve nut 4, a lifting ring 5, a first spring gasket 6, a bearing gland 7, a framework oil seal 8, a shaft elastic gasket 9, a bearing 10, a cavity O-shaped ring 11, a sealing box cover 12, an upper static ring O-shaped ring 13, an upper static ring 14, an upper moving ring 15, an inner hexagonal set screw 16, a sealing box seat 17, a lower static ring 18, a lower static ring sealing ring 19, a metal corrugated pipe 20, a shaft sleeve 21, a spring seat 22, an elastic piece 23, a push ring 24, an upper moving ring O-shaped ring 25, a sealing cavity 26, a plug 27, a cylindrical pin 28, a second spring gasket 29, a long bolt 30, a shell 31, a bolt 32, an annular groove 33, an inner groove 34, a static ring sealing assembly 35, a moving ring sealing assembly 36, a mounting seat 211, a containing cavity 171, a cooling liquid channel 172, a cooling liquid inlet 173 and a cooling liquid.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to perform more detailed description on the technical solution in the embodiments of the present invention.

As shown in fig. 1 to fig. 3, fig. 2 is an enlarged view of a position a in fig. 1, a position a is a schematic structural view of an annular groove on a seal box base 17, a mechanical seal includes a housing 31, a seal cavity 26, the seal box base 17, a seal box cover 12 and a shaft sleeve 21 for cooperatively mounting a transmission shaft, the seal box cover 12 is mounted at the upper end of the seal cavity 26, a cavity O-ring 11 is disposed between the seal box cover 12 and the seal cavity 26, a plug 27 is mounted on the seal box cover 12, the plug 27 plays a role of sealing, a bearing gland 1 is mounted at the upper end of the seal box cover 12, a framework oil seal 8 is disposed on the bearing gland 1, the framework oil seal 8 is disposed in the bearing gland 1, and the framework oil seal 8 can prevent silt, dust, moisture and the like from invading into the bearing gland 1 and limit the leakage of lubricating oil in the bearing gland 1; a bearing 10 matched with the shaft sleeve 21 is arranged between the bearing gland 1 and the sealing box cover 12, a shaft elastic retainer ring 9 is arranged at the contact part of the bearing 10 and the bearing gland 1, and the pre-tightening force between the bearing 10 and the bearing gland 1 can be increased by the shaft elastic retainer ring 9; a lifting ring 5 is arranged on the end face of one end of the bearing gland 1, the lifting ring 5 is installed on the bearing gland 1 through threaded connection, and a first spring washer 6 is sleeved on the lifting ring 5; the other end of the bearing gland 1 is provided with a long bolt 30, the long bolt 30 passes through the bearing gland 1 and is fixed on the sealing box seat 17, and a second elastic washer 29 is arranged between the long bolt 30 and the bearing gland 1; the axle sleeve 21 runs through in whole seal chamber 26, and axle sleeve gland 1 installs on axle sleeve 21 through the installation component, the installation component mainly including bolt 1, interior hex bolts 2, axle sleeve nut 4 and axle sleeve O shape circle 3, axle sleeve gland 1 one serve and install axle sleeve nut 4, axle sleeve O shape circle 3 and interior hex bolts 2 in proper order, install on the perpendicular to axle sleeve gland 1 of the other end bolt 32.

The seal box seat 17 is arranged at the lower end of the seal cavity 26, an accommodating cavity 171 is formed between the seal box seat 17 and the shaft sleeve 21, a cooling liquid channel 172 is arranged on the accommodating cavity 171, the cooling liquid channel 172 is arranged in the accommodating cavity 171, and a cooling liquid inlet 173 and a cooling liquid outlet 174 are formed at the left end and the right end of the seal box seat 17; in order to effectively accelerate the cooling efficiency of the transmission shaft and the dynamic and static ring sealing assembly, a plurality of annular grooves 33 are formed in the contact surface of the sealing box seat 17 and the transmission shaft, so that the cooling area of the contact surface of the sealing box seat 17 is increased, the annular grooves 33 are located at the lower end of the static ring sealing assembly 35, the shaft sleeve 21 is a cylindrical hollow body, the annular grooves 33 are formed in the sealing box seat 17 in the vertical direction, the annular grooves 33 are mutually abutted to the shaft sleeve 21, the number of the annular grooves 33 is 6-12, the annular grooves 33 are uniformly arranged on the sealing box seat 17, uniform heat dissipation is achieved, and a rapid heat dissipation effect is achieved.

The sealing cavity 26 is provided with a static sealing assembly 35 and a moving ring sealing assembly 36, the static sealing assembly 35 and the moving ring sealing assembly 36 are arranged between the shaft sleeve 21 and the sealing cavity 26, the static sealing assembly 35 comprises an upper static ring 14, a lower static ring 18, an upper static ring O-shaped ring 13 and a lower static ring sealing ring 19, an inner groove 34 is formed at the joint of the sealing cavity 26 and the sealing base 17, the lower static ring 18 is arranged on the inner groove 34 between the sealing cavity 26 and the sealing base 17, and the lower static ring 18 is sleeved with the lower static ring sealing ring 19; the upper stationary ring 14 is arranged at the joint of the sealed box cover 12 and the sealed cavity 26, the upper stationary ring 14 is provided with an upper stationary ring O-shaped ring 13, and the upper stationary ring 14 is arranged on the sealed box cover 12 through a cylindrical pin 28; the movable ring sealing assembly 36 is provided with an upper movable ring 15 and an upper movable ring O-shaped ring, the upper movable ring is arranged below the lower static ring, the upper movable ring O-shaped ring is sleeved on the upper movable ring 25, the upper movable ring 15 is arranged between the shaft sleeve 21 and the sealing cavity 26 through an inner hexagonal set screw 16, the mechanical sealing element is tightly matched with the movable ring sealing assembly 36 through a static sealing assembly 35, the movable ring sealing assembly 35 rotates along with the transmission shaft, the static ring sealing assembly 35 is fixed on the mechanical sealing element, and the mechanical sealing element is tightly matched with the movable ring sealing assembly 36 through the static sealing assembly 35, so that the sealing property is greatly improved; the lower end of the upper rotating ring 15 is provided with a spring seat 22, a push ring 24 and an elastic part 23 are arranged between the spring seat 22 and the upper rotating ring, the elastic part 23 in the design specifically adopts a spring, the push ring 24 is positioned between the upper rotating ring 25 and the spring seat 22, the upper end and the lower end of the elastic part are respectively pressed against the push ring 24 and the spring seat 22, the lower end of the spring seat 22 is provided with a mounting seat 211 and a metal corrugated pipe 20, the metal corrugated pipe 20 is mounted between the lower stationary ring 18 and the spring seat 22, and the metal corrugated pipe 20 is fixed on the mounting seat 211 through threaded connection.

The working principle is as follows: when the transmission shaft stops working, the cooling liquid is injected into the cooling liquid channel 172 in the accommodating cavity 171, the sealing box seat 17 is provided with the annular groove 33 to increase the cooling area, and the heat on the transmission shaft is rapidly dissipated through the annular groove 33.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concept is not limited to this embodiment, and any modification that utilizes the inventive concept is intended to be within the scope of the present patent application.

Claims

1. The utility model provides a mechanical seal, including casing, seal chamber, sealed case seat, sealed case lid and be used for the axle sleeve of cooperation installation transmission shaft, its characterized in that: the sealed box cover is arranged at the upper end of the sealed cavity, a cavity O-shaped ring is arranged between the sealed box cover and the sealed cavity, a plug is arranged on the sealed box cover, the sealed box base is arranged at the lower end of the sealed cavity, a containing cavity is formed between the sealed box base and the shaft sleeve, a cooling liquid channel is arranged on the containing cavity and is arranged in the containing cavity, and a cooling liquid inlet and a cooling liquid outlet are formed in the left end and the right end of the sealed box base; the sealing box seat is provided with a plurality of annular grooves on the contact surface with the transmission shaft, and the annular grooves are positioned at the lower end of the static ring sealing component.

2. A mechanical seal according to claim 1, wherein: the shaft sleeve is a cylindrical hollow body, annular grooves are formed in the sealing box seat in the vertical direction and are abutted to the shaft sleeve, and the number of the annular grooves is 6-12.

3. A mechanical seal according to claim 1, wherein: the sealing cavity is provided with a static sealing assembly and a moving ring sealing assembly, the static sealing assembly and the moving ring sealing assembly are arranged between the shaft sleeve and the sealing cavity, the static sealing assembly comprises an upper static ring, a lower static ring, an upper static ring O-shaped ring and a lower static ring sealing ring, an inner groove is formed at the joint of the sealing cavity and the sealing base, the lower static ring is arranged on the inner groove between the sealing cavity and the sealing base, and the lower static ring is sleeved with the lower static ring sealing ring; the upper stationary ring is arranged at the joint of the sealing box cover and the sealing cavity body, and an O-shaped ring of the upper stationary ring is arranged on the upper stationary ring.

4. A mechanical seal according to claim 3, wherein: the upper stationary ring is arranged on the sealing box cover through a cylindrical pin.

5. A mechanical seal according to claim 3, wherein: the movable ring sealing assembly is provided with an upper movable ring and an O-shaped ring of the upper movable ring, the upper movable ring is arranged below the lower static ring, the O-shaped ring of the upper movable ring is sleeved on the upper movable ring, and the upper movable ring is arranged between the shaft sleeve and the sealing cavity through an inner hexagonal set screw; the lower end of the upper moving ring is provided with a spring seat, a push ring and an elastic piece are arranged between the spring seat and the upper moving ring, the push ring is positioned between the upper moving ring and the spring seat, and the upper end and the lower end of the elastic piece are respectively pressed against the push ring and the spring seat.

6. A mechanical seal according to claim 4, wherein: the lower end of the spring seat is provided with a mounting seat and a metal corrugated pipe, the metal corrugated pipe is arranged between the lower static ring and the spring seat, and the metal corrugated pipe is fixed on the mounting seat through threaded connection.

7. A mechanical seal according to claim 1, wherein: the upper end of the sealing box cover is provided with a bearing gland, the bearing gland is provided with a framework oil seal, and the framework oil seal is positioned in the bearing gland; the bearing gland and the sealing box cover are provided with bearings matched with the shaft sleeve, and the abutting part of the bearings and the bearing gland is provided with an elastic retainer ring for the shaft.

8. A mechanical seal according to claim 7, wherein: the end face of one end of the bearing gland is provided with a lifting ring, the lifting ring is installed on the bearing gland through threaded connection, and a first spring washer is sleeved on the lifting ring; the other end of the bearing gland is provided with a long bolt which passes through the bearing gland to be fixed on the sealing box seat, and a second elastic gasket is arranged between the bolt and the bearing gland.

9. A mechanical seal according to claim 1, wherein: the shaft sleeve penetrates through the whole sealing cavity, the top end of the shaft sleeve is provided with a shaft sleeve gland, and the shaft sleeve gland is installed on the shaft sleeve through an installation assembly.