Data acquisition jig and method for closed impeller

Abstract

The invention relates to a data acquisition jig of a closed impeller. The data acquisition jig comprises a clamp and a probe, wherein the probe is composed of a probe head and a probe rod, the probe rod is made of deformable soft steel under the action of external force, the shape of the probe rod is matched with the shape of a blade of the closed impeller, the outer end of the probe rod is detachably fixed on the clamp, the inner end of the probe rod is provided with the probe head, and the position of the tip of the probe head is on the plane of the bottom surface of the clamp, or the position of the tip of the probe head is close to the plane of the bottom surface of the clamp. The invention further relates to a data acquisition method for the closed impeller by adopting the acquisition jig. The acquisition jig has the advantages of being simple in structure and manufacturing, convenient to use and the like, and the acquisition method has the advantages that blade data are rapidly collected and modeled under the condition that the closed impeller is not damaged, and a large amount of funds are saved for customers.

Description

Technical field[0001]The present invention relates to the technical field of centrifugal pumps, and is specifically a data acquisition fixture and method for closed impeller.Background technique[0002]The open-heart pump impeller is the core part of the centrifugal pump, which directly determines the efficiency, performance, and vapor balance of the pump. The impeller is divided into open impeller, semi-open impeller and closed impeller. Where start the impeller and semi-open impeller three laser scanners can almost collect all point cloud data, and for the closed impeller is also the impeller required by the API 610 because there is a front and rear cover, the data collection of the internal blade is not destroyed. In the case of an impeller, it is difficult to collect, even if we can see some of the scanners, it will be able to collect because the distance between the distance is not necessarily.[0003]At present, data acquisitions for closed impelings are usually fitted to collect ...

AI Technical Summary

Problems solved by technology

Among them, the method of collecting part of the point cloud at the entrance and exit for fitting takes less time for scanning, but the time for fitting is longer, and because the collected data only have cloud points visible at the part of the entrance and exit, the fitting accuracy is not enough

However, the method of injecting the molding agent to make the mold and then scanning the mold, the mold making agent is not only expensive to make the mold, but also takes a long time, but also due to the shrinkage of the molding agent and the insufficient number of fitting point clouds, etc. It is easy to cause errors in collecting data

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