Selecting and matching method for plunger assembly with check ring

Abstract

The invention relates to a matching method for a plunger assembly with a check ring. The matching method comprises the steps that (1) a sliding shoe, the check ring and a plunger are prepared; (2) the inner spherical surface of the sliding shoe is machined, and the size of the inner spherical surface of the sliding shoe is measured; (3) the sliding shoes are grouped according to the measurement size; (4) plunger outer spherical surfaces are machined according to the grouping condition of the sliding shoes, and grouping is conducted according to the sizes of the plunger outer spherical surfaces; 5) coloring the inner spherical surface of the matched sliding shoe by using the outer spherical surface of the plunger; (6) the inner spherical surfaces of the check rings are selected and machined according to the size b of the selected sliding shoes, and it is ensured that the a + b value of each set of check rings and sliding shoes meets the requirement and the difference value of each set is not larger than 0.01; and 7) polishing the outer spherical surface of the plunger, the inner spherical surface of the sliding shoe and the inner spherical surface of the check ring to finish matching. The plunger assembly can be efficiently selected and matched, and the service life of the plunger assembly can be effectively prolonged.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and relates to a matching method of a sliding shoe assembly, in particular to a matching method of a plunger assembly with a retaining ring. Background technique [0002] During the operation of the oscillating plunger pump, a continuous and stable oil film should be formed between the outer spherical surface (copper) of the sliding shoe and the inner spherical surface of the swash plate to separate the metal parts, so as to ensure that the sliding shoe and the sliding shoe seat do not occur during the high-speed relative sliding process. Direct contact to avoid overheating of parts and excessive wear of copper spherical surfaces. In order to ensure the continuous stability of the oil film in this process, it is necessary to provide a stable and continuous oil pressure from the inner cavity of the plunger to the oil pool of the sliding shoe, so the sliding shoe ( figure 1 middle piece 1) and...

AI Technical Summary

Problems solved by technology

If it is too large, it will cause pressure relief and cause the oil film on the surface of the sliding shoe to fail; if it is too small and the spherical surface profile is poor, it will cause the plunger assembly to be inflexible after closing, and the plunger will be stuck or even fatigued during operation.

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