Blade wheel of corrosion resistant chemical process pump and its machining process

Abstract

The invention relates to a pump, in particular to an impeller used for the corrosion-resistant chemical process pump and applied in the fields the chemical engineering, the petroleum, the pharmacy, the acid cleaning, etc. The impeller is made from the ultra high molecular weight fluorinated ethylene propylene by die pressing under the pressure of 8 to 12 MPa after being sintered under the temperature of 370 to 390 DEG C, and a metal bracket is arranged inside the impeller. The impeller has the advantages that a corrosion-resistant and anti-leak shaft sleeve and the rear part of the impeller are formed into a connecting body, not only the shaft sleeve originally arranged is replaced, but also the seal leakage point is reduced; the appearance is beautiful, the installation is quick and convenient, the corrosion-resistant and temperature-resistant performances are long, the impeller is never aged, the high maintenance frequency and the high maintenance cost due to the vulnerable shaft sleeve is reduced, and the problem of reduction of the service life of the pump due to the corrosivity of the chemical mediator of the user is fundamentally solved.

Description

[0001] Field of the invention: The present invention relates to a pump, in particular to an impeller and its processing technology used in corrosion-resistant chemical process pumps used in the fields of chemical industry, petroleum, pharmacy and pickling. Background technique: [0002] Existing chemical process pumps, both metal and non-metal, are required to be anti-corrosion, and leakage is not allowed. Once leakage, the service life of the equipment will be reduced, or even scrapped. In the current structure of the pump, the connection between the impeller and the pump shaft is a key connection, and the impeller and the shaft sleeve are compressed by the shaft nut. This structure will inevitably form three sealing leakage points, and there are many leakage points, although the service life is not long. In the later period, foreign technology was introduced, and the improved connection between the pump shaft thread and the impeller was reduced to a seal leakage point. This s...

AI Technical Summary

Problems solved by technology

[0002] Existing chemical process pumps, both metal and non-metal, are required to be anti-corrosion, and leakage is not allowed. Once leakage, the service life of the equipment will be reduced or even scrapped

In the current structure of the pump, the connection between the impeller and the pump shaft is a key connection, and the impeller and the shaft sleeve are compressed by the shaft head nut. This structure will inevitably form three seal leakage points, and there are many leakage points. Of course, the service life is not long.

In the later period, foreign technology was introduced, and the improved connection between the pump shaft thread and the impeller was reduced to a sealing leakage point. This structure is obviously a step forward, but there are still leakage points.

To sum up, neither of the above two structures can completely solve the problem of no leakage between the pump shaft and the impeller, so that the service life of the entire pump is limited. Once the sealing point leaks and is soaked in acid, the internal organs of the pump will be corroded and scrapped. , thus increasing the cost and reducing the economic benefit

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