Special clamp for abrasive flow polishing of narrow flow passage closed impeller flow passage

Abstract

The invention discloses a special clamp for abrasive flow polishing of a narrow flow passage closed impeller flow passage. The special clamp comprises an upper mold, a lower mold, a floating lock and a gasket support plate, wherein the upper mold and the lower mold form a cylindrical cavity; the inner diameter of the cylindrical cavity is greater than the diameter of the impellers; the gasket support plate is a round disc having the diameter as the same as the diameter of the impellers; the floating lock consists of an upper round disc and a lower round disc and a double-head stud and a bolt which are used for connecting the two round discs; the mounted floating lock can move between the gasket support plate and the lower mold; the impellers are arranged on the gasket support plate, and are fastened by the upper mold and the lower mold; and the upper mold and the lower mold are positioned through seam allowance, and are fixed by the bolts. The clamp for abrasive flow machining of the narrow plow passage closed impellers can be used for fixing the impellers and can guide abrasive materials to flow through the surface of the impeller flow passage, and keep a given pressure so as to grind and polish the internal part of the impeller flow passage, form a circular loop and realize reciprocating flow of the abrasive materials.

Description

technical field [0001] The invention relates to a fixture for polishing a narrow-channel closed impeller for a centrifugal compressor, in particular to a special fixture for polishing a narrow-channel closed impeller flow channel abrasive flow. Background technique [0002] The surface roughness inside the narrow-channel closed impeller flow channel used in high-pressure small-flow centrifugal compressors will affect the mechanical efficiency and flow efficiency of the compressor, and it needs to be polished. [0003] Both theoretical calculation and actual measurement show that the surface roughness inside the channel of the impeller with this structure has a great influence on the efficiency of the compressor, and reducing the surface roughness of the impeller channel is an effective way to reduce power loss. This is recognized by the current compressor industry. If the existing surface roughness can be increased by two grades, its efficiency will be increased by 1% to 2%...

AI Technical Summary

Problems solved by technology

This fixture cannot be used to polish narrow channel closed impeller channels

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