CN212564389U

CN212564389U - Mechanical sealing element

Info

Publication number: CN212564389U
Application number: CN202021292220.3U
Authority: CN
Inventors: 陈锦溪
Original assignee: Ningbo Runfor Sealing Technology Co ltd
Current assignee: Ningbo Runfor Sealing Technology Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-02-19
Anticipated expiration: 2030-07-03

Abstract

The utility model provides a mechanical sealing element, including quiet ring, rotating ring, parcel that rotate with the pivot is in the driving seat of rotating ring periphery, install in spring in the driving seat and by the spring promotes the throw-out collar of butt on the rotating ring, one side that the rotating ring is close to the throw-out collar has seted up the seal groove, install the sealing washer in the seal groove, the rotating ring is close to quiet ring one side and has seted up the lubricant groove, be connected with cooling circuit on the lubricant groove, cooling circuit includes inlet port, cooling chamber and backward flow hole, the inlet port is seted up and is linked through the cooling chamber along the rotating ring radial direction from the lubricant groove, the backward flow hole is connected the cooling chamber top and is kept away from quiet ring one side with the lubricant groove; the flow channel of the lubricating groove is increased by arranging the cooling loop, so that heat dissipation is facilitated.

Description

Mechanical sealing element

Technical Field

The utility model belongs to the technical field of mechanical seal, concretely relates to mechanical seal spare.

Background

The mechanical sealing device is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to a rotating axis, keeping fit under the action of fluid pressure and the elastic force of a compensation mechanism and the matching of auxiliary sealing and sliding relatively. The conventional mechanical sealing device is mainly composed of: the end face sealing device comprises an end face sealing pair (a static sealing ring and a dynamic sealing ring), an elastic element (such as a spring), an auxiliary seal (such as an O-shaped ring), a transmission part (such as a transmission pin and a transmission screw), an anti-rotation part (such as an anti-rotation pin), a fastener (such as a spring seat, a push ring, a gland, a set screw and a shaft sleeve) and the like.

Most mechanical seals are contact seals during use. The mechanism is that the contact end surfaces of the dynamic sealing ring and the static sealing ring are tightly attached under the action of sealing fluid pressure and elastic element pressing force and slide relatively to achieve sealing. When in work, the phenomena of friction, sliding, abrasion and the like simultaneously occur on the mechanical seal end face, and the friction is the basic characteristic of the mechanical seal end face. The working conditions of the friction of the end face of the mechanical seal are generally divided into: fluid friction, mixed friction and boundary friction, but never dry friction for a long time. When the sealing end face is in a dry friction state, the solid surface microprotrusions between the two end faces are in direct contact to cause severe abrasion, and a large amount of friction heat is generated during abrasion to seriously damage the service life of the mechanical sealing element.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mechanical seal to solve mechanical seal and damage life's problem because the heat that frictional wear produced in the use.

The utility model provides a following technical scheme:

the utility model provides a mechanical seal, is in including quiet ring, with synchronous pivoted rotating ring, parcel of pivot the transmission of rotating ring periphery, install spring in the transmission and by the spring promotes the throw-out collar of butt on the rotating ring, the seal groove has been seted up to one side that the rotating ring is close to the throw-out collar, install the sealing washer in the seal groove, the rotating ring is close to quiet ring one side and has seted up moist oil groove, be connected with cooling circuit on the moist oil groove, cooling circuit includes inlet port, cooling chamber and backward flow hole, the inlet port is seted up and is linked together the cooling chamber along the radial direction of rotating ring in the moist oil inslot, quiet ring one side is kept away from to hole connection cooling chamber top and moist oil groove.

Preferably, a plurality of annular blocking pieces are arranged in the cooling cavity, and the annular blocking pieces are used for forming a cooling curved path in the cooling cavity.

Preferably, a stop groove is formed in the inner wall of the transmission seat, and a clamping ring for limiting the movable ring is mounted in the stop groove.

Preferably, the sealing ring is a rubber O-shaped sealing ring.

Preferably, the static ring and the dynamic ring are both made of silicon carbide materials.

Preferably, one side of the static ring, which is far away from the rotating ring, is provided with a first anti-rotation pin, and one side of the transmission seat, which is far away from the static ring, is provided with a second anti-rotation pin.

The utility model has the advantages that:

the utility model relates to a mechanical sealing element, which increases the flow channel of the lubricating groove by arranging a cooling loop, thereby being beneficial to heat dissipation; the centrifugal force when the rotating ring rotates is utilized, so that the lubricating oil in the cooling loop can be circulated and cooled.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

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

FIG. 2 is a schematic view of the structure of part A of FIG. 1;

labeled as: 1. the oil-cooling device comprises a static ring, a moving ring, a transmission seat, a spring, a push ring, a sealing groove, a sealing ring, a lubricating groove, a cooling loop, an oil inlet hole, a cooling cavity, a return hole, an annular baffle, a stop groove and a retainer, wherein the static ring is 2, the moving ring is 3, the transmission seat is 4, the spring is 5, the push ring is 6, the sealing groove is 7, the lubricating groove is 8, the cooling loop is 9, the oil inlet hole is 91, the.

Detailed Description

As shown in fig. 1, a mechanical sealing element includes a stationary ring 1, a rotating ring 2 rotating synchronously with a rotating shaft, a transmission seat 3 wrapping the periphery of the rotating ring 2, a spring 4 installed in the transmission seat 3, and a push ring 5 pushed by the spring 4 and abutted against the rotating ring 2, wherein a stop groove 10 is formed in the inner wall of the transmission seat 3, a collar 11 for limiting the rotating ring 2 is installed in the stop groove 10, a first anti-rotation pin is installed on one side of the stationary ring 1 away from the rotating ring 2, and a second anti-rotation pin is installed on one side of the transmission seat 3 away from the stationary ring 1; therefore, the driving seat 3 and the stationary ring 1 are kept stationary relative to the housing, and the movable ring 2 is driven by the rotating shaft to rotate relative to the driving seat 3 and the stationary ring 1.

One side of the movable ring 2, which faces the push ring 5, is provided with a sealing groove 6, a sealing ring 7 is installed in the sealing groove 6, the sealing ring 7 is a rubber O-shaped sealing ring, the end surface of the sealing ring is round, and the sealing ring has a good self-tightening effect, so that the sealing ring has good sealing performance relative to other sealing rings; the sealing ring 7 is arranged between the rotating shaft and the moving ring 2 on one hand, and the sealing ring 7 is arranged between the push ring 5 and the moving ring 2 on the other hand, so that on the one hand, the fitting property of the moving ring 2 and the rotating shaft is improved; meanwhile, the vibration generated by the relative rotation of the movable ring 2 and the push ring 5 is reduced; the static ring 1 and the dynamic ring 2 are both made of silicon carbide materials, and the heat dissipation performance of the static ring and the dynamic ring is good.

As shown in fig. 2, the oil lubrication groove 8 is opened on one side of the rotating ring 2 close to the stationary ring 1, the oil lubrication groove 8 is opened on the inner wall of one side of the rotating ring 2 facing the stationary ring 1, and the oil lubrication groove 8 is filled with lubricating oil, so that the oil film at the oil lubrication groove 8 is thick, the friction force between the rotating ring 2 and the stationary ring 1 is reduced, and the abrasion between the rotating ring 2 and the stationary ring 1 is reduced.

The lubricating oil groove 8 is connected with a cooling loop 9; the cooling circuit 9 comprises an oil inlet hole 91, a cooling cavity 91 and a return hole 93, the oil inlet hole 91 is formed in the lubricating oil groove 8 along the radial direction of the moving ring 2 and communicated with the cooling cavity 92, the return hole 93 is connected with the top of the cooling cavity 92 and one side, far away from the stationary ring 1, of the lubricating oil groove 8, a plurality of annular blocking pieces 94 are arranged in the cooling cavity 92, and the annular blocking pieces 94 are used for forming a cooling curved path in the cooling cavity 92; therefore, the lubricating oil groove 8 is lengthened to form a flow passage, which is beneficial to heat dissipation.

The working process of the specific embodiment is as follows:

compared with the conventional lubricating oil tank 6, the cooling loop 9 is additionally arranged, and enough lubricating oil needs to be filled in the cooling loop 9, so that the lubricating oil can flow under the action of centrifugal force, and a flow passage is formed to facilitate heat dissipation while the lubricating oil flows; meanwhile, the static ring 1 and the dynamic ring 2 are both made of silicon carbide materials, and the heat dissipation performance of the static ring and the dynamic ring is good; under the state of the comprehensive structure, the heat dissipation effect is optimal.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a mechanical seal, its characterized in that is in including quiet ring, with synchronous pivoted rotating ring of pivot, parcel the transmission of rotating ring periphery, install spring in the transmission with by the spring promotes the throw-out collar of butt on the rotating ring, the rotating ring is close to one side of throw-out collar and has seted up the seal groove, install the sealing washer in the seal groove, the rotating ring is close to quiet ring one side and has seted up moist oil groove, be connected with cooling circuit on the moist oil groove, cooling circuit includes inlet port, cooling chamber and backward flow hole, the inlet port is seted up and is linked together the cooling chamber along the radial direction of rotating ring from moist oil inslot, quiet ring one side is kept away from to backward flow jogged joint cooling chamber top and moist oil groove.

2. A mechanical seal according to claim 1, wherein a plurality of annular baffles are provided in the cooling chamber, the annular baffles being adapted to form a cooling labyrinth in the cooling chamber.

3. The mechanical seal of claim 1, wherein a stop groove is formed on an inner wall of the transmission seat, and a collar for limiting the rotating ring is installed in the stop groove.

4. A mechanical seal according to claim 1, wherein said seal is a rubber O-ring.

5. The mechanical seal of claim 1, wherein said stationary ring and said rotating ring are both made of silicon carbide material.

6. A mechanical seal according to claim 1, wherein a first anti-rotation pin is mounted on the side of the stationary ring remote from the rotating ring, and a second anti-rotation pin is mounted on the side of the transmission housing remote from the stationary ring.