CN220891079U

CN220891079U - Mechanical sealing device

Info

Publication number: CN220891079U
Application number: CN202322500473.5U
Authority: CN
Inventors: 陈锦溪
Original assignee: Ningbo Runfor Sealing Technology Co ltd
Current assignee: Ningbo Runfor Sealing Technology Co ltd
Priority date: 2023-09-14
Filing date: 2023-09-14
Publication date: 2024-05-03
Anticipated expiration: 2033-09-14

Abstract

The utility model discloses a mechanical sealing device, which comprises a shaft sleeve assembly, wherein the outer wall of the shaft sleeve assembly is sleeved with a sealing assembly; the shaft sleeve assembly comprises a sleeve, a shaft sleeve main body, a sealing ring, a convex strip, a thread sleeve, an extension ring, a conical sleeve and a first sealing ring, wherein one end of the shaft sleeve main body is fixedly connected to the inner wall of the sleeve. According to the utility model, the conical sleeve is used for pushing the sealing ring to deform, so that the inner wall of the sealing ring is tightly attached to the outer wall of the rotating shaft, the first sealing ring is arranged on the inner wall of the conical sleeve, the tightness between the shaft sleeve main body and the rotating shaft is further improved, the inner wall of the sealing ring is provided with a plurality of groups of bulges, the pressure between the bulges and the rotating shaft is higher, the better tightness is provided, lubricating oil can be smeared on the groove of the inner wall of the sealing ring in the installation process, the effect of oil storage is achieved, and therefore, the sealing ring is sufficiently lubricated, and the air tightness between the sealing ring and the rotating shaft is improved.

Description

Mechanical sealing device

Technical Field

The utility model relates to the technical field of sealing elements, in particular to a mechanical sealing device.

Background

The mechanical seal means a device for preventing fluid leakage, which is formed by at least one pair of end surfaces perpendicular to a rotation axis and keeping fit and sliding relatively under the action of fluid pressure and elasticity (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal, and the conventional common mechanical seal structure generally comprises a stationary ring (stationary ring), a rotating ring (movable ring), a compensation mechanism (spring, bellows, etc.), a set screw, an auxiliary seal ring of the rotating ring, an auxiliary seal ring of the stationary ring, and the like, and an anti-rotation pin is fixed on a pressure cover to prevent the rotation of the stationary ring.

The mechanical sealing device in the prior art has the problems of poor stability and insufficient pressure resistance in the use process due to poor floatability of the movable ring and the shaft sleeve, poor parallelism after assembly and eccentric wear of the friction pair.

The prior patent (bulletin number: CN 211449643U) is a mechanical sealing device. The mechanical sealing device comprises a shaft sleeve, a movable ring, a stationary ring push ring, a water distribution ring, a transmission ring assembly, a gland, a transmission pin, an anti-rotation pin, a cylindrical spiral spring, a first O-shaped sealing ring, a second O-shaped sealing ring, a third O-shaped sealing ring and a fourth O-shaped sealing ring. The mechanical sealing device increases the floatability between the movable ring and the shaft sleeve, ensures the sealing effect, and can improve the stability and the pressure resistance of the mechanical sealing device.

However, the technical scheme still has a certain defect, the sealing performance is provided between the shaft sleeve and the rotating shaft through the first O-shaped sealing ring in the using process, but after the sealing ring is used for a long time, the sealing ring is oxidized due to natural oxidation and heat generated by equipment, so that the elasticity of the sealing ring is poor, the sealing ring cannot be tightly attached to the outer part of the rotating shaft, and substances such as lubricating oil in the equipment can flow out from the position between the shaft sleeve and the rotating shaft.

Disclosure of utility model

Based on the above, the present utility model is directed to a mechanical sealing device, so as to solve the technical problem that the sealing ring cannot be tightly attached to the outside of the rotating shaft due to the poor elasticity of the sealing ring caused by natural oxidation and oxidation of heat generated by equipment.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the mechanical sealing device comprises a shaft sleeve assembly, wherein the outer wall of the shaft sleeve assembly is sleeved with a sealing assembly;

The shaft sleeve assembly comprises a sleeve, a shaft sleeve main body, a sealing ring, a convex strip, a thread bush, an extension ring, a conical sleeve and a first sealing ring, wherein one end of the shaft sleeve main body is fixedly connected with the inner wall of the sleeve, the other end of the shaft sleeve main body is fixedly connected with the sealing ring, the thread bush is connected with the outer wall of the sleeve in a threaded manner, the extension ring extending to the inside of the sleeve is arranged on the inner wall of the thread bush in a fixed manner, the conical sleeve is fixedly connected with the inner wall of the extension ring, the inner wall of the conical sleeve is abutted to the outer wall of the sealing ring, and the first sealing ring is arranged on the inner wall of the conical sleeve in a fixed manner.

As a preferable technical scheme of the mechanical sealing device, the sealing assembly comprises a fixed seat, a stationary ring main body, a baffle, a movable ring main body, a supporting spring, a second sealing ring, a convex block, a sliding chute and a notch, wherein the fixed seat is sleeved on the outer wall of a sleeve, and a plurality of groups of threaded holes are formed in the side wall of the fixed seat.

As a preferable technical scheme of the mechanical sealing device, the inner wall of the fixed seat is connected with the stationary ring main body in a sliding manner, and the outer wall of the sleeve is fixedly sleeved with the baffle.

As a preferable technical scheme of the mechanical sealing device, the side wall of the baffle is abutted against the movable ring main body, and the movable ring main body is sleeved on the outer wall of the sleeve in a sliding manner.

As a preferable technical scheme of the mechanical sealing device, two groups of protruding blocks extending into the side wall of the sleeve are fixedly connected to the inner wall of the movable ring main body, a chute is arranged at the joint of the sleeve and the protruding blocks, a notch is formed in the side wall of the chute, and the movable ring main body consists of two semicircular rings.

As a preferable technical scheme of the mechanical sealing device, one ends of two groups of supporting springs are fixedly connected to the inner wall of the fixing seat, and the other ends of the two groups of supporting springs are fixedly connected to the side wall of the stationary ring main body.

In summary, the utility model has the following advantages:

1. According to the utility model, the conical sleeve is used for pushing the sealing ring to deform, so that the inner wall of the sealing ring is tightly attached to the outer wall of the rotating shaft, the first sealing ring is arranged on the inner wall of the conical sleeve, the tightness between the shaft sleeve main body and the rotating shaft is further improved, a plurality of groups of bulges are arranged on the inner wall of the sealing ring, so that the pressure between the bulges and the rotating shaft is higher, the better tightness is provided, lubricating oil can be smeared on the grooves on the inner wall of the sealing ring in the installation process, the effect of oil storage is achieved, and therefore, the sealing ring is sufficiently lubricated and the air tightness between the sealing ring and the rotating shaft is improved;

2. According to the utility model, the movable ring main body is pushed to drive the convex blocks to slide to the gaps in the sliding grooves, so that the two semicircular movable ring main bodies are pulled to two sides, the convex blocks slide out of the sliding grooves from the gaps, then the convex blocks on the new movable ring main body can be pushed into the sliding grooves from the gaps, the movable ring main body is mounted, and the movable ring main body can be replaced conveniently.

Drawings

FIG. 1 is a schematic diagram of a front view of the present utility model;

FIG. 2 is a schematic view of a longitudinal cross-sectional structure of the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model;

FIG. 4 is a schematic view of the seal ring structure of the present utility model.

In the figure: 1. a sleeve assembly; 2. a seal assembly;

101. a sleeve; 102. a sleeve body; 103. a seal ring; 104. a thread sleeve; 105. an extension ring; 106. a conical sleeve; 107. a first seal ring;

201. A fixing seat; 202. a stationary ring body; 203. a baffle; 204. a moving ring main body; 205. a support spring; 206. a second seal ring; 207. a bump; 208. a chute; 209. and (5) a notch.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Hereinafter, an embodiment of the present utility model will be described in accordance with its entire structure.

1-4, A mechanical sealing device comprises a shaft sleeve assembly 1, wherein the outer wall of the shaft sleeve assembly 1 is sleeved with a sealing assembly 2;

The shaft sleeve assembly 1 comprises a sleeve 101, a shaft sleeve main body 102, a sealing ring 103, a raised strip 1031, a thread sleeve 104, an extension ring 105, a conical sleeve 106 and a first sealing ring 107, wherein the inner wall of the sleeve 101 is fixedly connected with one end of the shaft sleeve main body 102, the other end of the shaft sleeve main body 102 is fixedly connected with the sealing ring 103, the outer wall of the sleeve 101 is in threaded connection with the thread sleeve 104, the extension ring 105 extending into the sleeve 101 is fixedly sleeved on the inner wall of the thread sleeve 104, the conical sleeve 106 is fixedly connected with the inner wall of the extension ring 105, the inner wall of the conical sleeve 106 is abutted to the outer wall of the sealing ring 103, and the first sealing ring 107 is fixedly sleeved on the inner wall of the conical sleeve 106.

Make the screw thread cover 104 rotate through the screw thread with the sleeve pipe 101 to promote extension ring 105 and extend to the sleeve pipe 101 is inside, make the extension pipe drive toper cover 106 and remove, toper cover 106 is in the in-process of removing push seal ring 103 and take place deformation, thereby make the inner wall of seal ring 103 closely laminate in the outer wall of pivot, and through setting up first sealing washer 107 at the inner wall of toper cover 106, further improve the leakproofness between axle sleeve main part 102 and the pivot, and set up the multiunit arch at the inner wall of seal ring 103, make the pressure between protruding department and the pivot bigger provide better leakproofness, and can smear lubricating oil at sealing ring 103 inner wall recess department at the installation, play the effect of depositing oil, thereby make seal ring 103 obtain sufficient lubrication and improve the gas tightness between seal ring 103 and the pivot.

Referring to the figure, the sealing assembly 2 comprises a fixing seat 201, a static ring main body 202, a baffle 203, a moving ring main body 204, supporting springs 205, a second sealing ring 206, a protruding block 207, a sliding groove 208 and a notch 209, wherein the fixing seat 201 is sleeved on the outer wall of the sleeve 101, a plurality of groups of threaded holes are formed in the side wall of the fixing seat 201, the inner wall of the fixing seat 201 is slidably connected with the static ring main body 202, the baffle 203 is fixedly sleeved on the outer wall of the sleeve 101, the moving ring main body 204 is slidably sleeved on the outer wall of the sleeve 101, two groups of protruding blocks 207 extending into the side wall of the sleeve 101 are fixedly connected to the inner wall of the moving ring main body 204, a sliding groove 208 is formed in the joint of the sleeve 101 and the protruding block 207, a notch 209 is formed in the side wall of the sliding groove 208, the moving ring main body 204 is formed by two semicircular rings, one ends of the two groups of supporting springs 205 are fixedly connected to the inner wall of the fixing seat 201, and the other ends of the two groups of supporting springs 205 are fixedly connected to the side wall of the static ring main body 202.

The movable ring main body 204 is pushed to drive the protruding blocks 207 to slide to the notch 209 in the sliding groove 208, so that the two semicircular movable ring main bodies 204 are pulled to two sides, the protruding blocks 207 slide out of the sliding groove 208 from the notch 209, then the protruding blocks 207 on the new movable ring main body 204 can be pushed into the sliding groove 208 from the notch 209, the movable ring main body 204 is mounted, the movable ring main body 204 can be replaced conveniently, when the mechanical sealing device is normally used, the support springs 205 push the stationary ring main body 202 to tightly abut against the side wall of the movable ring main body 204, so that the other side of the movable ring main body 204 tightly abuts against the baffle 203, enough tightness is provided between the movable ring main body 204 and the baffle 203, and enough tightness is provided between the movable ring main body 204 and the stationary ring main body 202, the stationary ring main body 202 pushes the movable ring main body 204 to push the movable ring main body 204 to the notch 209 through the elasticity of the support springs 205, and the movable ring main body 204 cannot be driven to slide to the notch 209, and therefore, the movable ring main body 204 is prevented from being separated from the outer wall 101.

During the use, push sealing ring 103 through toper cover 106 takes place deformation to make the inner wall of sealing ring 103 closely laminate in the outer wall of pivot, and through setting up first sealing washer 107 at the inner wall of toper cover 106, further improve the leakproofness between axle sleeve main part 102 and the pivot, and set up multiunit arch at the inner wall of sealing ring 103, make the pressure between protruding department and the pivot bigger provide better leakproofness, and can smear lubricating oil in the installation at sealing ring 103 inner wall recess department, play the effect of depositing oil, thereby make sealing ring 103 obtain sufficient lubrication and improve the gas tightness between sealing ring 103 and the pivot.

Although embodiments of the utility model have been shown and described, the detailed description is to be construed as exemplary only and is not limiting of the utility model as the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and modifications, substitutions, variations, etc. may be made in the embodiments as desired by those skilled in the art without departing from the principles and spirit of the utility model, provided that such modifications are within the scope of the appended claims.

Claims

1. A mechanical sealing device comprising a bushing assembly (1), characterized in that: the outer wall of the shaft sleeve assembly (1) is sleeved with a sealing assembly (2);

The shaft sleeve assembly (1) comprises a sleeve (101), a shaft sleeve main body (102), a sealing ring (103), a raised line (1031), a thread sleeve (104), an extension ring (105), a conical sleeve (106) and a first sealing ring (107), wherein the inner wall of the sleeve (101) is fixedly connected with one end of the shaft sleeve main body (102), the other end of the shaft sleeve main body (102) is fixedly connected with the sealing ring (103), the thread sleeve (104) is connected with the outer wall of the sleeve (101) in a threaded manner, the extension ring (105) extending into the sleeve (101) is fixedly sleeved on the inner wall of the thread sleeve (104), the conical sleeve (106) is fixedly connected with the conical sleeve (106), and the inner wall of the conical sleeve (106) is fixedly sleeved with the first sealing ring (107).

2. A mechanical seal according to claim 1, wherein: seal assembly (2) are including fixing base (201), quiet ring main part (202), baffle (203), moving ring main part (204), supporting spring (205), second sealing washer (206), lug (207), spout (208) and breach (209), fixing base (201) cover is established at the outer wall of sleeve pipe (101), multiunit screw hole has been seted up to the lateral wall of fixing base (201).

3. A mechanical seal according to claim 2, wherein: the inner wall sliding connection of fixing base (201) has quiet ring main part (202), the outer wall fixed cover of sleeve pipe (101) is equipped with baffle (203).

4. A mechanical seal according to claim 2, wherein: the side wall of the baffle (203) is abutted with a movable ring main body (204), and the movable ring main body (204) is sleeved on the outer wall of the sleeve (101) in a sliding manner.

5. A mechanical seal according to claim 2, wherein: the inner wall fixedly connected with of moving ring main part (204) is two sets of lug (207) that extend to in sleeve pipe (101) the lateral wall, sleeve pipe (101) are provided with spout (208) in the junction with lug (207), breach (209) have been seted up to the lateral wall of spout (208), moving ring main part (204) are constituteed by two semicircle rings.

6. A mechanical seal according to claim 2, wherein: one ends of two groups of supporting springs (205) are fixedly connected to the inner wall of the fixing seat (201), and the other ends of the two groups of supporting springs (205) are fixedly connected to the side wall of the stationary ring main body (202).