CN215596405U

CN215596405U - Shaft sealing assembly

Info

Publication number: CN215596405U
Application number: CN202121489969.1U
Authority: CN
Inventors: 姜大伟
Original assignee: Suzhou Kyle Yingde Transmission Technology Co ltd
Current assignee: Wu Guocai
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-01-21
Anticipated expiration: 2031-07-01

Abstract

The utility model discloses a shaft sealing assembly which comprises a static ring and a movable ring, wherein the static ring and the movable ring are mutually clamped and sleeved on a sealed shaft, the outer side of the static ring is in contact with and relatively fixed with a shell of an external bearing box, an annular groove with a central hole is arranged in the middle of the front end face of the static ring, a boss with a central hole is formed in the middle of the annular groove, an inner clamping groove with an annular groove wall is formed in the inner side groove wall of the annular groove, a groove which is matched with the boss and is formed in the central hole of the ring is formed in the middle of the rear side of the movable ring, an outer clamping groove with an annular groove wall is formed in the outer side groove wall of the groove, the edge of the boss in the front side of the inner clamping groove is clamped in the outer clamping groove, and a protruding part in the rear side of the outer clamping groove extends into and is clamped in the inner clamping groove. The shaft seal assembly for sealing the shaft parts has good sealing effect, is not easy to grind a shaft, and has long-term leakage-preventing performance, so the practicability is high.

Description

Shaft sealing assembly

Technical Field

The utility model relates to a shaft sealing assembly, and relates to the technical field of shaft sealing equipment.

Background

The shaft seal is a friction seal or stuffing box used for preventing liquid leakage between a shaft and a bearing of a compressor or other fluid conveying equipment and is a sealing device arranged for preventing leakage between a pump shaft and a shell. Common types of shaft seals are packing seals, mechanical seals and dynamic seals. The shaft seal of a reciprocating pump is typically a packing seal. When the delivery of a medium that does not allow leakage is not allowed, a diaphragm type reciprocating pump may be employed. The shaft seal of the rotary pump mainly comprises a packing seal, a mechanical seal and a dynamic seal. At present, the sealing performance of a plurality of shaft seals is not high, especially under the working condition of forced lubrication oil mist, a plurality of shaft seals cannot meet the sealing requirement, and the shaft seals are easy to leak after being used for a long time, so that the later maintenance cost is increased.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the shaft seal assembly for sealing shaft parts is capable of effectively improving sealing effect.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model provides an axle type seal assembly, includes quiet ring and rotating ring, quiet ring and the mutual chucking of rotating ring and ring cover are epaxial in being sealed, the quiet ring outside contacts and the relative fixation with the shell of external bearing case, quiet ring front end face middle part is equipped with the ring channel that the ring centre bore set up, and the ring channel middle part forms the boss of ring centre bore, opens the interior draw-in groove that has the annular groove wall to set up on the inboard cell wall of ring channel, open the rear side middle part of rotating ring has the recess that sets up with boss cooperation and ring centre bore, and the outside groove wall of recess is equipped with the outer draw-in groove that the ring channel wall set up, and the boss edge chucking of interior draw-in groove front side is in outer draw-in groove, the protruding portion of outer draw-in groove rear side stretches into and the chucking is in the draw-in groove.

Preferably, the outer periphery of the boss at the front side of the inner card slot is an assembly bevel edge with an inclination angle of 15 degrees, and the outer periphery of the projection at the rear side of the outer card slot is an assembly bevel edge with an inclination angle of 15 degrees.

Preferably, an oil storage groove arranged on the annular hole wall is formed on the rear side hole wall of the central hole of the static ring.

Preferably, a plurality of buffer air holes penetrating through the ring body are formed in the rear side groove wall of the oil storage groove.

Preferably, a fan-shaped oil return groove hole penetrating through the ring body is formed in the lowest portion of the rear side groove wall of the oil storage groove.

Preferably, an annular sealing groove used for placing a sealing ring is formed in the outer side wall of the static ring, the sealing ring is arranged between the annular sealing ring and the outer bearing box shell, and the sealing ring is in interference fit with the outer bearing box shell.

Preferably, a first sealing groove is formed in the groove bottom of the annular groove, a second sealing groove which is arranged in an annular groove and is opposite to the first sealing groove is formed in the rear end face of the movable ring, and a sealing cavity for placing the soft polytetrafluoroethylene sealing material is formed between the first sealing groove and the second sealing groove.

Preferably, a third sealing groove arranged on the inner wall of the ring is formed in the inner wall of the central hole of the movable ring, and an O-shaped sealing ring sleeved on the shaft in an interference fit manner is arranged in the third sealing groove.

Preferably, the upper side groove edge of the annular groove of the static ring is provided with an extending edge extending outwards, and the peripheral edge of the front side end face of the dynamic ring is provided with a cofferdam edge clamped with the extending edge.

Compared with the prior art, the utility model has the advantages that: the shaft seal assembly for sealing the shaft parts is simple in structure, convenient to install, operate and use, good in sealing effect and difficult to grind the shaft especially under the working condition of forced lubrication oil mist, and has long-term leakage-proof performance, so that the shutdown maintenance time is effectively reduced, the maintenance cost is reduced, the practicability is high, and the shaft seal assembly is suitable for popularization and application.

Description of the drawings:

in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and 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 the drawings without creative efforts;

FIG. 1 is a side sectional view of the present invention as installed;

FIG. 2 is a schematic diagram showing the positions of the buffer air holes and the oil return slots according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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:

as shown in fig. 1 and 2, the shaft sealing assembly includes a stationary ring 1 and a moving ring 2, the stationary ring and the moving ring are both of an annular structure and have a coaxial central hole with the same size, the stationary ring and the moving ring are clamped and sleeved on a sealed shaft 3, and then the shaft is sealed, in practical application, the outer side of the stationary ring is in contact with and relatively fixed to a housing of an external bearing box, so as to keep the stationary ring stationary and maintain the stability of the stationary ring.

The middle part of the front side end face of the static ring is provided with an annular groove 7 with a central ring hole, in practical application, the ring body of the dynamic ring is fixed in the annular groove, the middle part of the annular groove is provided with a boss 8 with a central ring hole, the inner side groove wall of the annular groove is provided with an inner clamping groove 9 with a ring groove wall, in the embodiment, the outer periphery of the boss at the front side of the inner clamping groove is an assembly bevel edge 10 with an inclination angle of 15 degrees for convenient installation and assembly; the middle part of the rear side of the movable ring is provided with a groove 11 which is matched with the boss and is arranged in a ring central hole, the outer side groove wall of the groove is provided with an outer clamping groove 12 which is arranged on the ring groove wall, in the embodiment, for convenient assembly, the outer periphery of the protruding part 25 at the rear side of the outer clamping groove is an assembly bevel edge 13 which also has an inclination angle of 15 degrees, therefore, in practical application, the press-fitting fixing process is realized by sliding fit of the assembly bevel edges at the peripheries of the boss and the protruding part at the rear side of the outer clamping groove, finally, the boss edge at the front side of the inner clamping groove is clamped in the outer clamping groove, the protruding part at the rear side of the outer clamping groove extends into and is clamped in the inner clamping groove, so that the assembling process is simple and quick, the clamping fixing effect is good, the stability is high, in addition, in the embodiment, upper and lower point contacts are formed between the outer edge of the boss and the groove bottom of the outer clamping groove, and the outer edge of the protruding part at the rear side of the outer clamping groove and the groove, when the shaft has up-and-down play, the sealing element can not be locked, so that the sealing effect is better, the damage is not easy, the service life is long, and the later maintenance cost is reduced.

In this implementation, the rear side pore wall of the central hole of the stationary ring is provided with an oil storage groove 14 arranged on the annular pore wall, and the oil storage groove is used for collecting liquid in the stationary ring and also can effectively prevent substances in a pressure fog state from entering a buffer groove in a combining cavity of the stationary ring and the stationary ring, furthermore, in order to facilitate oil return, the lowest part of the rear side pore wall of the oil storage groove is provided with a fan-shaped oil return groove hole 15 penetrating through the annular body, so that when the oil level in the bearing box is low, most of the collected liquid enters the groove and then flows out through the oil return groove hole and is discharged back into the bearing box.

In this embodiment, open on the rear side cell wall of oil storage groove have a plurality of circular array distribute at the centre bore periphery and link up the buffering gas pocket 16 of ring body, therefore, in practical application, through buffering the gas pocket, can alleviate the pressure of the cavity in the sound ring joint chamber, reduce bigger atmospheric pressure and get into sound ring sealing device intracavity, can also effectively be the vaporific material in the cavity in the leading-in oil storage groove in addition, these vaporific materials will assemble into oily liquid and because the action of gravity and discharge along the oil return slotted hole after long-time accumulation.

In addition, for further improving the sealing effect, the tank bottom of ring channel is equipped with first seal groove 17, the rear end face of rotating ring is equipped with the second seal groove 18 that the ring groove set up and set up with first seal groove relatively, forms the seal chamber that is used for placing soft polytetrafluoroethylene sealing material 19 between first seal groove and the second seal groove, soft polytetrafluoroethylene sealing material has self-lubricating nature, can bear the operating mode of-250 ℃ to +280 ℃, and chemical corrosion resistance is used for the gaseous state medium that completely seals entering rotating ring, quiet ring combination intracavity.

For further improving the sealing effect, the third seal groove 20 that the centre bore inner wall of rotating ring opened the setting of ring inner wall, be provided with the O type sealing washer 21 of interference fit ring cover epaxial in the third seal groove, through O type sealing washer, can prevent the gas or the liquid outflow in the bearing box, can prevent simultaneously again that foreign matter from getting into the bearing box, therefore the leakproofness is high.

In this embodiment, the side slot is equipped with epitaxial extension limit 22 on the ring channel of quiet ring, the preceding side end face neighboring of rotating ring is equipped with and extends the cofferdam limit 23 of limit chucking, therefore effectively improves the steadiness when both combine the installation of quiet ring and rotating ring, improves overall structure's stability, and in addition, the side slot is equipped with and is formed with a collecting vat 24 between epitaxial extension limit and the quiet ring body on the ring channel of quiet ring, and then conveniently collects and discharges external material.

Therefore, in practical application, the opposite contact surface between the front end surface of the boss and the groove bottom of the groove on the rotating ring is sealed by the opposite contact surface when no pressure exists in the bearing box cavity, and when the pressure exists, the contact is formed between the boss and the protruding part on the outer side of the outer clamping groove to seal.

Above-mentioned shaft type part seals uses bearing seal subassembly simple structure, installation operation convenient to use, especially under force-feed lubrication's oil mist operating mode, sealed effectual is difficult to the mill axle, has long-term leak-proof performance moreover, therefore effectively reduces down the maintenance time, reduces the maintenance cost, and the practicality is high.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a shaft seal subassembly for shaft type part is sealed which characterized in that: including quiet ring and rotating ring, quiet ring and the mutual chucking of rotating ring and ring cover are epaxial in being sealed, the quiet ring outside contacts and the relative fixation with the shell of external bearing case, quiet ring front end face middle part is equipped with the ring channel that the ring centre bore set up, and the ring channel middle part forms the boss of ring centre bore, opens the interior draw-in groove that has the annular groove wall to set up on the inboard cell wall of ring channel, open at the rear side middle part of rotating ring has the recess that sets up with boss cooperation and ring centre bore, and the outside groove wall of recess is equipped with the exterior clamping groove that the ring groove wall set up, and the boss edge chucking of interior clamping groove front side is in exterior clamping groove, the protruding portion of exterior clamping groove rear side stretches into and the chucking in the interior draw-in groove.

2. The shaft seal assembly of claim 1 wherein: the outer periphery of the boss on the front side of the inner clamping groove is an assembly bevel edge with an inclination angle of 15 degrees, and the outer periphery of the protruding portion on the rear side of the outer clamping groove is an assembly bevel edge with an inclination angle of 15 degrees.

3. The shaft seal assembly of claim 1 wherein: and an oil storage groove arranged on the wall of the annular hole is formed in the wall of the rear side hole of the central hole of the static ring.

4. The shaft seal assembly of claim 3 wherein: and a plurality of buffer air holes penetrating through the ring body are formed in the rear side groove wall of the oil storage groove.

5. The shaft seal assembly of claim 3 wherein: the lowest part of the rear side tank wall of the oil storage tank is provided with a fan-shaped oil return slotted hole which penetrates through the ring body.

6. The shaft seal assembly of claim 1 wherein: the outer side wall of the static ring is provided with an annular sealing groove for placing a sealing ring, the sealing ring is arranged between the annular sealing ring and the outer bearing box shell, and the sealing ring is in interference fit with the outer bearing box shell.

7. The shaft seal assembly of claim 1 wherein: the tank bottom of ring channel is equipped with first seal groove, the rear end face of rotating ring is equipped with the second seal groove that the ring recess set up and set up with first seal groove relatively, forms the seal chamber that is used for placing soft polytetrafluoroethylene sealing material between first seal groove and the second seal groove.

8. The shaft seal assembly of claim 1 wherein: and a third sealing groove arranged on the inner wall of the ring is formed in the inner wall of the central hole of the movable ring, and an O-shaped sealing ring sleeved on the shaft in an interference fit manner is arranged in the third sealing groove.

9. The shaft seal assembly of claim 1 wherein: the upper side groove edge of the annular groove of the static ring is provided with an extending edge, and the peripheral edge of the front side end surface of the dynamic ring is provided with a cofferdam edge clamped with the extending edge.