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Analysis of Damage Causes and Maintenance Points of Dynamic Seals for Pumps

Analysis of Damage Causes and Maintenance Points of Dynamic Seals for Pumps

1. Analysis of the actual situation: K-type dynamic seal is a commonly used shaft seal for anti-corrosion slurry pumps. Its advantages are: first, simple structure, low maintenance technical requirements, easy to use; second, good versatility, both suitable for clear liquid, It is also suitable for the transportation of slurry; third, it has good anti-corrosion performance, and can be used in almost all kinds of corrosive media. But there is also a big disadvantage: easy to leak. Judging from the leakage situation, the first leakage time is 15~50 days, mainly distributed in the positions that pressurize and convey the slurry, such as the feed pump of the filter press; the first leakage time is 5~6 months. The result of statistical analysis is that the positions are distributed in the circulation of conveying materials at atmospheric pressure, and most of them belong to this situation (generally, the actual working pressure is below 80% of the design pressure of the pump, for example, the rated design pressure of the pump is 0.5MPa, and the actual working pressure is 0.4 MPa. Posts below MPa); there are also posts where the first seal leakage occurs in about a year. Most of the conclusions drawn through research and analysis are distributed in posts where clear liquid is transported and the operating pressure is lower than the design pressure, such as sulfuric acid engineering purification. Dilute acid circulation pump in the system. According to the comprehensive analysis of the above situation, we found that the life of K-type dynamic seal is mostly related to the operating pressure.

15

2021

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09

Correlation between wear resistance of pump lining material and pump shaft seal

Correlation between wear resistance of pump lining material and pump shaft seal

On the surface, there is little correlation between the wear-resistant pump shaft seal and the pump flow components (impeller, pump cover), but the actual relationship is very large. Because the life of the seal is related to the fluid pressure at the sealing part, the closer the fluid pressure is to "0", the longer the seal life, and vice versa, the shorter the seal life, especially like the K-type fluid dynamic shaft seal and packing seal, the fluid pressure More relevant to the life of the seal!

15

2021

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09

Magnetic pump selection steps and precautions

Magnetic pump selection steps and precautions

The selection of magnetic pump is similar to the selection of conventional centrifugal pump, but some differences should be noted. Zeus Pumps summarizes the steps and precautions of magnetic pump selection as follows:

15

2021

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09

Maintenance and maintenance method of clean water centrifugal pump

Maintenance and maintenance method of clean water centrifugal pump

The clean water centrifugal pump is a rear-opening type, and it is not necessary to disassemble the suction and discharge pipelines when disassembling the pump cover and impeller. The suspension houses two ball bearings, lubricated with machine oil or grease. The pump is directly driven by an electric motor through an elastic coupling. The vortex chamber, feet, inlet flange and outlet flange are cast as a whole. The structure of the clean water centrifugal pump is simple. First of all, it should be ensured that the pump is used within the rated range and cannot be run at no-load. Secondly, pay attention to avoid cavitation and steam binding, strengthen inspections, and replace worn sealing parts in time. Finally, pay attention to the following points. Items, you can master the correct use method and prolong the service life of the pump.

15

2021

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09

Analysis of Damage Causes and Maintenance Points of Dynamic Seals for Pumps

Analysis of Damage Causes and Maintenance Points of Dynamic Seals for Pumps

K-type dynamic seal is a commonly used shaft seal for anti-corrosion slurry pumps. Its main advantages are: first, simple structure, low maintenance technical requirements, and convenient use; second, good versatility, suitable for both clear liquid and slurry transportation; The third is good anti-corrosion performance, almost all kinds of corrosive media can be used. But there is also a big disadvantage: easy to leak. Judging from the leakage situation, the first leakage time is 15~50 days, mainly distributed in the positions that pressurize and convey the slurry, such as the feed pump of the filter press; the first leakage time is 5~6 months. The result of statistical analysis is that the positions are distributed in the circulation of conveying materials at atmospheric pressure, and most of them belong to this situation (generally, the actual working pressure is below 80% of the design pressure of the pump, for example, the rated design pressure of the pump is 0.5MPa, and the actual working pressure is 0.4 MPa. Posts below MPa); there are also posts where the first seal leakage occurs in about a year. Most of the conclusions drawn through research and analysis are distributed in posts where clear liquid is transported and the operating pressure is lower than the design pressure, such as sulfuric acid engineering purification. Dilute acid circulation pump in the system. According to the comprehensive analysis of the above situation, we found that the life of K-type dynamic seal is mostly related to the operating pressure.

15

2021

/

09

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Dalian Tianlong petrochemical pump industry co., LTD

Address: Xiajiahezi Industrial Park, Ganjingzi District, Dalian City

Phone:13052762868 (Manager Fan)

Tel:+86-411-86800129

E-mail:tlshyzs@126.com

Url:http://dlztsh.cn

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