CN110043671B

CN110043671B - Novel mechanical seal

Info

Publication number: CN110043671B
Application number: CN201910297124.3A
Authority: CN
Inventors: 苏杨; 王洪群; 徐奔驰; 谢明辉; 吴亮; 邹晨; 邹志富; 吴丽娟; 孟绳续; 周国忠; 黄志坚
Original assignee: Zhejiang Greatwall Mixers Co ltd
Current assignee: Zhejiang Greatwall Mixers Co ltd
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2024-07-09
Anticipated expiration: 2039-04-02
Also published as: CN110043671A

Abstract

The invention discloses a novel mechanical seal, which comprises an upper spring seat (2) and a floating ring (5) at the lower part of the upper spring seat, wherein the spring seat (2) is detachably arranged on a rotating shaft (1), a spring (3) is assembled between the spring seat (2) and the floating ring (5), the lower end surface of the floating ring (5) is attached to the upper end surface of a static ring (6), the static ring (6) is assembled on a mounting flange (7) in a sealing way, an elastic sealing ring (4) is assembled on a boss section (51) close to the rotating shaft (1), a groove for accommodating the elastic sealing ring (4) is formed in the middle position of the boss section (51), and the floating ring can axially float and has a certain degree of inclination freedom, can be sealed better, and is simple in structure and convenient to install and use.

Description

Novel mechanical seal

Technical Field

The invention belongs to the technical field of mechanical sealing, and is used for sealing a rotary shaft at the junction of a container inserting opening.

Background

At present, the mechanical seal is widely applied to the rotary shaft seal of places such as a transmission pump, a stirring kettle and the like. Fig. 1 is a schematic view of a prior art mechanical seal. When the elastic sealing ring works, the floating ring rotates along with the rotating shaft, and the end face between the floating ring and the static ring is in fit friction to realize radial sealing, and the elastic sealing ring is in axial sealing in a gap between the floating ring and the rotating shaft. The vibration of the equipment in operation can lead the rotating shaft at the mechanical seal to jump or displace, and the floating ring is required to axially float and have a certain degree of inclination freedom, so that the mechanical seal can be better sealed. The axial floating performance of the mechanical seal in the prior art can meet the requirement, but the inclination degree of freedom is slightly insufficient, mainly because the whole height of the floating ring is large, the radial gaps at the upper part and the lower part of the whole height are very small, and the degree of freedom is severely limited. When the rotating shaft at the mechanical seal position is jumped or displaced due to equipment vibration in the working process, the lower end face of the floating ring and the upper end face of the static ring cannot be guaranteed to be kept in fit and seal due to the fact that the inclination degree of freedom of the floating ring is limited.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel mechanical seal, and a floating ring of the novel mechanical seal can axially float and has a certain degree of inclination freedom, so that better sealing is realized.

The invention solves the technical problems, adopts the technical means that the novel mechanical seal comprises an upper spring seat and a floating ring at the lower part of the upper spring seat, wherein the spring seat is detachably arranged on a rotating shaft, a spring is assembled between the spring seat and the floating ring, the lower end surface of the floating ring is attached to the upper end surface of the static ring, the static ring is assembled on a mounting flange in a sealing way, an elastic sealing ring is assembled on a boss section, which is close to the rotating shaft, of the floating ring, and a groove for accommodating the elastic sealing ring is designed at the middle position of the boss section. The boss section is close to the lower end face of the floating ring, so that the stress of the floating ring when bearing the pressure in the container is reduced. The height of the boss section takes a low value on the premise of meeting the design strength requirement, and the boss section is small in height, so that the inclination degree of freedom of the floating ring is improved. The novel mechanical seal is characterized in that the floating ring is small in height close to the boss section of the rotating shaft, so that the floating ring can axially float and has a certain degree of inclination freedom as long as a gap is reserved between the floating ring and the rotating shaft.

As a further improvement, chamfers are machined on the upper side and the lower side of the boss section, which are close to the rotating shaft, so that the inclination degree of freedom of the floating ring is improved, and the lower end face of the floating ring and the upper end face of the static ring can be kept in a fitting and sealing mode all the time in the working process.

The invention has the beneficial effects that when the equipment vibrates to cause the rotating shaft at the mechanical seal to jump or displace in working, the floating ring can axially float and have a certain degree of inclination freedom, so that the sealing can be better realized, and the structure is simple and the installation and the use are convenient.

Drawings

Fig. 1 is a schematic view of a prior art mechanical seal.

Fig. 2 is a schematic view of a novel mechanical seal structure.

Fig. 3 is an enlarged schematic view of the structure of the joint of the novel mechanical seal floating ring and the elastic seal ring with the rotating shaft.

In the figure: 1. a rotating shaft; 2. a spring seat; 3. a spring; 4. an elastic sealing ring; 5. a floating ring; 6. a stationary ring; 7. and (5) mounting a flange.

Detailed Description

As an implementation mode of the novel mechanical seal, the novel mechanical seal comprises an upper spring seat 2 and a floating ring 5 at the lower part of the upper spring seat, the spring seat 2 is installed on a rotating shaft 1 in the working process, a spring 3 is assembled between the spring seat 2 and the floating ring 5, the lower end face of the floating ring 5 is attached to the upper end face of a static ring 6, the static ring 6 is assembled on a mounting flange 7 in a sealing way, an elastic sealing ring 4 is assembled on a boss section 51, which is close to the rotating shaft 1, of the floating ring 5, a groove for accommodating the elastic sealing ring 4 is designed in the middle position of the boss section 51, the boss section 51 is consistent with the lower end face of the floating ring 5, chamfers 511 are machined at the positions, which are close to the rotating shaft 1, of the upper side and the lower side of the boss section 51, and a container insertion opening, which is required to be sealed, of the novel mechanical seal is installed to the rotating shaft by means of the mounting flange 7.

Claims

1. The utility model provides a novel mechanical seal, floating ring (5) including upper portion spring holder (2) and its lower part, spring holder (2) detachably installs on pivot (1), be furnished with spring (3) between spring holder (2) and floating ring (5), the laminating of terminal surface and quiet ring (6) up end under floating ring (5), quiet ring (6) seal fit is on mounting flange (7), characterized in that elastic seal ring (4) fit is at boss section (51) that floating ring (5) are close with pivot (1), boss section (51) intermediate position design has the slot that holds elastic seal ring (4), boss section (51) are close to floating ring (5) lower terminal surface, boss (51) height is getting low value under the prerequisite that satisfies the design strength requirement.

2. The novel mechanical seal according to claim 1, wherein chamfers (511) are machined on the upper side and the lower side of the boss section (51) close to the rotating shaft (1).