Nanometer material increase manufacturing method of upstream pumping mechanical seal

Abstract

The invention belongs to the field of machine manufacturing, and particularly relates to a nanometer material increase manufacturing method of an upstream pumping mechanical seal. The method includes the following steps that 1, a support ring is manufactured through material increase; 2, the supporting ring is precisely ground; 3, a mask is manufactured; 4, a dynamic sealing ring is manufactured through material increase; 5, the dynamic sealing ring is precisely ground, and accordingly an upstream pumping mechanical seal ring is manufactured. The upstream pumping mechanical seal ring is manufactured through the nanometer material increase manufacturing method and is not limited by a sealing ring groove type structure and a material, and the dynamic sealing ring with performance better than that of a sealing ring base body and an end face fluid dynamic pressing groove of the dynamic sealing ring can be manufactured; the dynamic sealing ring is manufactured through gradient composite electro brush-plating nanometer ceramic powder material increase, gradient increase of the content of ceramic powder in the dynamic sealing ring is achieved, abrasion resistance and corrosion resistance of the fluid dynamic pressing groove of the upstream pumping mechanical seal can be effectively improved, the service life of the upstream pumping mechanical seal is effectively prolonged, and the sealing effect is improved. A common metal material is adopted in the sealing ring base body, cost of the sealing ring is reduced, and machining is easy.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and in particular relates to a nano-additive manufacturing method of an upstream pumping mechanical seal. Background technique [0002] The upstream pumping mechanical seal is a fluid-lubricated non-contact mechanical seal, which can realize zero leakage or even zero escape of the sealing medium, completely eliminate environmental pollution, and has the advantages of less wear, less heat generation, long service life and low operation and maintenance costs Low cost, obvious economic benefits, etc., especially suitable for difficult sealing occasions such as high temperature, high pressure, easy vaporization, high risk and high pollution. It can replace ordinary contact double-face seals and has broad application prospects. The hydrodynamic sealing groove on the sealing ring is a key component that affects the performance of the upstream pumping mechanical seal. Surface roughness Ra<0.1...

AI Technical Summary

Problems solved by technology

The problems of this method are low manufacturing precision, uneven edge of the processed dynamic pressure groove, serious distortion of fine parts such as sharp corners, poor cross-sectional groove shape, rough sandblasting surface, etc., which will affect the hydrodynamic pressure of the groove line Effect and sealing characteristics

[0008] In addition, the use of metal-based ceramics or hard alloys to make sealing rings requires additional precision positioning and installation mechanisms, which greatly increases the cost, and when sealing high-temperature media, due to the different thermal expansion coefficients of the sealing ring and the installation substrate, the installation joint surface Leakage due to thermal deformation

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