Lossless surveying and mapping method of enclosed impeller

Abstract

The invention relates to a lossless surveying and mapping method of an enclosed impeller, comprising the following steps: A. select one impeller vane chamber and perform surveying and mapping to the inlet and the outlet of the impeller vane chamber to obtain an inlet and outlet point cloud curve surface; B. fill high-elasticity liquid moulding agents in the impeller vane chamber, take out after solidification and formation to obtain a vane chamber male mold; C. coat parting agents on the male mold and place the male mold into a liquid pond with the same density, and take out after the liquid in the pond is solidified to obtain a vane chamber female mold in the liquid pond; D. perform surveying and mapping to the vane chamber female mold to obtain a vane chamber point cloud curve surface; E. splice the vane chamber point cloud curve surface and the inlet and outlet point cloud curve surface to form an integral vane chamber curve surface and complete the surveying and mapping to the impeller. In the lossless surveying and mapping method of the enclosed impeller, the male mold formed by filling and solidification of the impeller chamber is placed in the liquid with the same density and then is re-solidified to obtain the female mold, so as to basically eliminate the elastic deformation caused by self-gravity and remarkably improve the surveying and mapping precision; moreover, the operation is simple and the technical difficulty is low.

Description

technical field [0001] The invention relates to a surveying and mapping method of an impeller, in particular to a non-destructive surveying and mapping method of a closed impeller, belonging to the technical field of measurement. Background technique [0002] The impeller is an important component of the pump. During the use of the pump, the impeller rotates at a high speed and is in direct contact with the liquid. Its surface is extremely susceptible to wear and corrosion, and needs to be replaced frequently. Since the impellers of various pumps have different shapes and sizes, they cannot be used universally. Usually, new impellers can only be purchased from manufacturers for replacement, but the cost is relatively high, especially for imported pumps. Therefore, it is often necessary to survey and map the existing impeller, and then process a new impeller for replacement according to the spatial shape of the impeller blades obtained by surveying and mapping, which ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to aim at the existing closed impeller surveying and mapping method which requires damage to the impeller structure, and the design and fitting of non-destructive surveying and mapping is difficult and difficult to calculate and analyze. The workload is heavy, and the model deformation of the plastic mold surveying and mapping is too large, which affects the defects and deficiencies of the surveying and mapping accuracy. A new non-destructive surveying and mapping method for closed impellers is provided. The concave mold is solidified again in the liquid of the same density, thereby basically eliminating the elastic deformation of the model caused by its own gravity, and significantly improving the accuracy of surveying and mapping. It is easy to operate, low in technical difficulty, and high in accuracy.