Assistive device for detecting axial thermal deformation amount of vane wheel in automobile water pump

Abstract

An auxiliary device for detecting the axial thermal deformation of an impeller in an automobile water pump. The detection device is composed of a base, a rolling bearing, a stepped mandrel, and a handle. The base is provided with an inverted tapered detection groove, and the bottom of the detection groove is provided with a bearing. The rolling bearing is assembled in the bearing hole, the lower end of the mandrel is connected with the inner ring of the rolling bearing, and the internal thread hole on the handle is engaged with the external thread at the upper end of the mandrel. The overall axial deformation of the plastic impeller is determined by installing and fixing the impeller on the detection aid, rotating the mandrel, and using a feeler gauge to detect the difference in the gap between each blade and the conical surface of the detection groove at the same position before and after the impeller is hot soaked.

Description

technical field [0001] The invention belongs to the field of detection aids, in particular to a detection aid for the axial thermal deformation of an impeller in an automobile water pump. Background technique [0002] Engineering plastic impellers have the characteristics of light weight, good dynamic balance, and smooth surface. In recent years, they have been widely used in automobile water pump impellers; because engineering plastic impellers are soaked in engine coolant and heated after being heated; therefore, in the product development and verification stage, it is necessary Detect whether the overall radial and axial thermal deformation of the engineering plastic impeller meets the design requirements; the overall radial deformation of the engineering plastic impeller can be determined by detecting the change in the outer diameter of the impeller before and after the heat soak test; the overall axial thermal deformation of the plastic impeller Deformation, at present,...

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Problems solved by technology

[0002] Engineering plastic impellers have the characteristics of light weight, good dynamic balance, and smooth surface. In recent years, they have been widely used in automobile water pump impellers; because engineering plastic impellers are soaked in engine coolant and heated after being heated; therefore, in the product development and verification stage, it is necessary Detect whether the overall radial and axial thermal deformation of the engineering plastic impeller meets the design requirements; the overall radial deformation of the engineering plastic impeller can be determined by detecting the change in the outer diameter of the impeller before and after the heat soak test; the overall axial thermal deformation of the plastic impeller Deformation, at present, there is no relatively simple, convenient, and accurate detection method. At present, only the axial thermal deformation of the sample block of engineering plastics is detected, but the shape of the sample block is different from that of the plastic impeller. The amount of deformation cannot effectively reflect the overall axial deformation of the plastic impeller, and a detection aid needs to be designed to solve this problem

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