Grinding method of complex shaped surface of four-shaft linkage mechanical seal ring

Abstract

The invention relates to a grinding method of a complex shaped surface of a four-shaft linkage mechanical seal ring, and belongs to the technical field of grinding of complex shaped surfaces. The grinding method is characterized in that a workpiece shaft, a cup-shaped grinding wheel, a grinding wheel shaft, a swinging workbench, an X-direction straight-line movable platform and a Z-direction straight-line movable platform are used, and the workpiece shaft is arranged on the swinging workbench; the swinging workbench is arranged on the X-direction straight-line movable platform, and the grinding wheel shaft is arranged on the Z-direction straight-line movable platform; and the cut-in grinding is carried out through the end surface of the grinding wheel. When the inclined corrugated surface is ground, the rotary movement of the workpiece shaft, the reciprocating swing of the swinging workbench and the straight-line movement of the X-direction straight-line movable platform and the Z-direction straight-line movable platform are controlled by linkage; and when the dam surface is ground, the rotational axis of the grinding wheel shaft is parallel to the rotational axis of the workpiece shaft. The grinding method has the effects and benefits that the hydrodynamic sealing ring complex shaped surface formed by the flat annular dam surface and the inclined corrugated surface of which the radial outline is a slightly inclined straight line and the inclined angle periodically changes along the circumferential direction has high surface shape accuracy and low surface roughness machining.

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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