A three-axis linkage mechanical seal ring complex surface grinding method

Abstract

The invention discloses a complex molded surface grinding method for a three-axis linkage mechanical sealing ring and belongs to the technical field of complex molded surface grinding. The method is characterized in that a workpiece shaft, a cup-shaped grinding wheel, a grinding wheel shaft, a swinging work table, and a linear movement platform are adopted; the workpiece shaft is arranged on the swinging work table; the grinding wheel shaft is arranged on the linear movement platform; the rotation axis of the grinding wheel shaft is perpendicularly intersected with the swinging axis of the swinging work table; and the direction of the rotation axis of the grinding wheel shaft is parallel to the movement direction of the linear movement platform, and crush grinding is performed through the end face of the grinding wheel. When an inclined corrugated surface is ground, the rotary motion of the workpiece shaft, the reciprocating swinging of the swinging work table and the linear movement of the linear movement platform are controlled in a coordinated way. When a dam surface is ground, the rotation axis of the cup-shaped grinding wheel is parallel to that of the workpiece shaft. The method has the advantages that the high-surface shape accuracy and low-surface roughness complex molded surface machining of a fluid dynamic pressure sealing ring consisting of the flat annular dam face and the inclined corrugated surface of which the radial contour is a slightly inclined straight line and the inclined angle changes periodically along the circumferential direction can be realized.

Description

technical field [0001] The invention belongs to the technical field of complex shape surface grinding, and relates to the grinding of mechanical seal rings, in particular to a kind of bevel whose flat circular dam surface and radial profile are slightly inclined straight lines and whose inclination angle changes periodically along the circumferential direction. An ultra-precision grinding method for complex-shaped surfaces of hydrodynamic and static-pressure combined mechanical seal rings composed of corrugated surfaces. Background technique [0002] Mechanical seals are widely used in rotating equipment such as pumps, compressors, reactors, agitators, centrifuges and filters that transfer liquids or gases. The development of modern industrial production has higher and higher requirements on the performance and life of mechanical seals working under conditions of high speed, high pressure and high temperature. In the early mechanical seals, the two sealing end faces that fi...

AI Technical Summary

Problems solved by technology

Since the inclined corrugated surface is a free-form surface in space, it cannot be processed by traditional grinding methods. However, when multi-axis linkage CNC point contact grinding is used, the grinding wheel wears quickly and the shape retention is poor, so it is difficult to obtain satisfactory surface accuracy. ; Airbag polishing, magnetorheological polishing, ion beam polishing and other computer-controlled optical surface modification technologies can realize high-precision processing of optical curved surfaces, but the processing efficiency is low, and there are edge effects to varying degrees when processing ring-shaped parts. The intersection with the oblique corrugated surface is a first-order differential discontinuity, and it is extremely difficult to accurately modify the shape; there is a problem of large surface roughness when laser processing is used

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