CN215595980U

CN215595980U - Slurry pump container type mechanical sealing element

Info

Publication number: CN215595980U
Application number: CN202121749082.1U
Authority: CN
Inventors: 陈卫东; 秦永翔
Original assignee: Nantong Jiangshan Agrochemical & Chemicals Co ltd
Current assignee: Nantong Jiangshan Agrochemical & Chemicals Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-01-21
Anticipated expiration: 2031-07-29

Abstract

The utility model discloses a slurry pump integrated mechanical sealing element, wherein a pump shaft sleeve is sleeved on a rotating shaft, and a mechanical sealing shaft sleeve, a medium end moving ring, a medium end static ring, a gland, a cooling section static ring and a cooling section moving ring are sequentially sleeved on the outer wall of the pump shaft sleeve. The medium end static ring is connected with one side of the gland through a spring A; the other side of the gland is connected with a cooling section static connecting ring through a spring B. The gland is provided with a cooling water channel and a cooling water pipeline. The spring failure rate of the utility model is greatly reduced, so that the medium end is better sealed, the material waste is reduced, and the raw material consumption and the equipment maintenance cost are reduced.

Description

Slurry pump container type mechanical sealing element

Technical Field

The present invention relates to a mechanical shaft seal device.

Background

In the production of N- (phosphonomethyl) iminodiacetic acid, N- (phosphonomethyl) iminodiacetic acid slurry generated after condensation and neutralization reaction is conveyed by an FDU (fully drawn yarn) engineering plastic pump, material leakage at a shaft seal part often occurs to influence the normal operation of production, and materials leaked out of a system enter a wastewater system to damage the field environment and increase the wastewater treatment cost. When the failure frequency is the highest, machine seal maintenance is required to be carried out every week. After the pump mechanical seal structure and the operation process are investigated and analyzed, the original mechanical seal is found to have defects.

The common mechanical seal is a sealing device composed of a friction pair consisting of a pair or a plurality of pairs of moving rings and static rings, and a proper pressing force is generated on the contact surfaces of the rotating moving rings and the static rings by means of elastic construction and the pressure of a sealing medium, so that two end surfaces are tightly attached, and a layer of extremely thin liquid film is maintained between the sealing end surfaces to achieve the purpose of sealing. The static ring is arranged on the pressure cover and is connected with the spring; the rotating ring is arranged on the shaft, the static ring does not rotate, and the rotating ring and the shaft rotate together; since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage.

The utility model with the patent application number of 2009100137639 provides a mechanical seal static ring, a dynamic ring and a double-end-face mechanical seal formed by the same, and belongs to the technical field of sealing. The symmetrical structure of the utility model does not treat different environments of different side media differently, the actual sealing effect is not necessarily good, and the sealing effect is further weakened because of no cooling and easy overheating.

Disclosure of Invention

Utility model purpose:

the composite shaft seal structure is provided, the shaft seal is not easy to leak materials, is suitable for corrosive slurry, and can be cooled by a slurry pump integrated mechanical sealing element.

The technical scheme is as follows:

the utility model relates to a slurry pump container type mechanical sealing element, wherein a pump shaft sleeve is sleeved on a rotating shaft, and a mechanical sealing shaft sleeve, a medium end moving ring, a medium end static ring, a gland, a cooling section static ring, a cooling section moving ring and a limiting block (provided with a limiting block screw) are sequentially sleeved on the outer wall of the pump shaft sleeve.

The medium end static ring is connected with one side of the gland through a spring A; the other side of the gland is connected with the cooling section static ring through a spring B. The length of the spring A is smaller than that of the spring B, so that the moving distance of the medium end static ring is smaller, and the medium leakage caused by too large gap between the medium end static ring and the moving ring is prevented. And the cooling section has no substance leakage and has no concern about the substance leakage.

A cooling water channel is arranged in the gland, and a cooling water pipeline is arranged between the medium end static ring, the spring A, the gland, the spring B, the cooling section static ring and the pump shaft sleeve (one end of the cooling water pipeline is arranged on a joint surface between the medium end static ring and the medium end dynamic ring, so that the temperature of the joint surface can be conveniently reduced, a lubricating water film is conveniently added, the friction is reduced, and the service lives of the medium end static ring, the spring A, the gland, the spring B and the cooling section static ring are prolonged). The cooling water channel is communicated with the cooling water pipeline, so that cooling water can be conveniently introduced, and two elastic cooling effects can be realized.

The sealing ring is made of fluororubber or POM, and is corrosion-resistant and temperature-resistant. Other structural members may use corrosion resistant and lighter weight titanium or corrosion resistant and reasonably priced 316 stainless steel.

Has the advantages that:

the container mechanical seal has the advantages that: (1) the leakage problem during starting can not occur, and the sealing surface is protected from being polluted by sundries or damaged due to misoperation before installation or starting; (2) when the device is installed, only a tight sealing cover bolt is needed to be sleeved, so that the assembly quality is easy to ensure; (3) the seal is easily removed for cleaning and inspection without disassembling the pump apparatus.

The utility model also has the following advantages: reliable cooling is realized, the failure rate of parts such as springs is greatly reduced, and the failure rate is increased from the original once per week to once per year; the reliability of sealing and maintenance work efficiency are improved. The medium end is better sealed, which is beneficial to reducing material waste and reducing raw material consumption.

Drawings

FIG. 1 is a schematic view of an axial cross-sectional configuration of the present invention;

in the figure, 1-pump shaft sleeve, 2-machine seal shaft sleeve, 3-medium end moving ring, 4-medium end static ring, 5-gland, 6-cooling section static ring, 7-cooling section moving ring, 8-limiting block (provided with 11-limiting block screw), sealing rings (10, 13, 14, 16, 17, 18 and 19), 20-cooling water channel, 21-cooling water pipeline, 30-rotating shaft, 40-spring A and 41-spring B are arranged.

Detailed Description

As shown in fig. 1, a shaft sleeve of a pump is sleeved on a rotating shaft, and a mechanical seal shaft sleeve, a medium end dynamic ring, a medium end static ring, a gland, a cooling section static ring, a cooling section dynamic ring or a limit block are sequentially sleeved on the outer wall of the shaft sleeve of the pump; the medium end static ring is connected with one side of the gland through a spring A; the other side of the gland is connected with a cooling section static connecting ring through a spring B: the length of spring a is lower than the length of spring B.

Be provided with the cooling water passageway in the gland, the static ring of medium end, spring A, gland, spring B, cooling zone have the cooling water pipeline between quiet ring and the pump shaft sleeve, are convenient for cool off two springs and the two sealed faces of quiet ring and rotating ring contact department, increase the radiating effect, increase of service life.

Claims

1. The utility model provides a thick liquids pump flexible container formula mechanical seal spare, the cover is equipped with pump axle sleeve, its characterized in that in the pivot: the outer wall of the pump shaft sleeve is sequentially sleeved with a mechanical seal shaft sleeve, a medium end moving ring, a medium end static ring, a gland, a cooling section static ring, a cooling section moving ring or a limit block; the medium end static ring is connected with one side of the gland through a spring A; the other side of the gland is connected with a cooling section static connecting ring through a spring B.

2. The slurry pump-in mechanical seal of claim 1, wherein: the length of spring a is lower than the length of spring B.

3. The slurry pump-in mechanical seal of claim 1 or 2, wherein: a cooling water channel is arranged in the gland, and a cooling water pipeline is arranged between the medium end static ring, the spring A, the gland, the spring B, the cooling section static ring and the pump shaft sleeve.