A processing method for flow channels between blades of an equal-section blade-type crowned integral impeller

Abstract

The invention discloses a machining method and device for vane channels of a uniform-cross section profile cowled integral impeller. The machining method comprises the following steps of firstly designing near shaped electrodes of entry machining areas and exit machining areas of the channels by applying the numerical control electric spark technology; respectively starting machining from entries and exits of the channels by using a set of entry machining area electrodes and a set of exit machining area electrodes of which the number is equal to that of the vane channels of the impeller to finish rough machining of all channels; finishing semi finish machining and finish machining on all the channels in sequence by applying a numerical control compensating motion; and processing channels with special surface requirements by adopting other finishing machining processes, such as an abrasive flow machining process and the like to achieve corresponding surface quality requirements. The machining device comprises a reference seat, a reference element, an electrode holder, electrodes and a base. Compared with a traditional machining method for the vane channels of the uniform-cross section profile cowled integral impeller, the machining method for the vane channels of the uniform-cross section profile cowled integral impeller disclosed by the invention has the technical economic characteristics that the efficiency is high and the precision is high.

Description

technical field [0001] The invention belongs to the technical field of processing an interblade flow channel of a shrouded integral impeller, and in particular relates to a method and a device for processing an interblade flow channel of an equal-section blade type crowned integral impeller. Background technique [0002] The crowned integral impeller means that a ring-shaped crown is added to the periphery of the impeller, that is, all the blade tips are connected to the same crown to form an integral impeller, which is to better meet the high-performance requirements of the modern aerospace industry. A new type of impeller structure has emerged, which has outstanding advantages such as high transmission efficiency, small number of parts, light weight, compact structure, and high structural strength, which can better meet the needs of increasing engine life, improving engine working efficiency, thrust-to-weight ratio and safety It represents the development direction of the ...

AI Technical Summary

Problems solved by technology

[0010] When the CNC EDM technology adopted in my country is used to process the inter-blade flow channels of the crowned integral impeller with equal cross-section blades, usually only one flow channel is processed at a time, and it takes a long time to process the multi-blade equal cross-section crowned integral impeller. , less efficient

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