Shaft-disc coordinate deviation measuring method for slotted welding impeller

Abstract

The invention discloses a shaft-disc coordinate deviation measuring method of a slotted welding impeller, relates to the technical field of compressors, and mainly aims to improve the measuring efficiency of the shaft-disc coordinate deviation of the slotted welding impeller and reduce the cost of the measurement. The method comprises the following steps: measuring a total height of the slotted welding impeller placed on a measuring reference platform supported by at least three jacks, a first height from a shaft-disc opening ring to the measuring reference platform, a second height from the shaf- disc excircle to the measuring reference platform and the thickness of the shaft-disc; calculating a third height from the outer circle of the shaft-disc to the top of the impeller according to the total height and the second height, and calculating a calibration target height from the opening circle of the shaft-disc to the top of the impeller according to the total height, the first heightand the thickness of the shaft-disc; and if the height difference value between the third height and the calibration target height is not in a preset allowable height difference value range, determining that the shaft-disc coordinate of the slotted welding impeller has deviation. The shaft-disc coordinate deviation measuring method of the slotted welding impeller is suitable for the shaft-disc coordinate deviation measurement of the impeller.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a method for measuring the coordinate deviation of a shaft disk of a slotted welded impeller. Background technique [0002] The impeller is one of the core components of the centrifugal compressor. The precision requirements of the impeller after finishing are very strict. Any small size and shape change will affect the efficiency of the entire centrifugal compressor unit. However, the impeller has many complicated manufacturing processes. After the thermal processing such as welding and heat treatment, it is very easy to deform during the production process, especially the large-diameter slotted welded impeller will generally have obvious deformation after heat treatment. [0003] Slotted welded impellers are heat treated after welding, generally after quenching and tempering treatment or adjusting aging treatment. Due to the relatively constrained structure of the slotted ...

AI Technical Summary

Problems solved by technology

However, due to factors such as the small internal space of the flow channel of the slotted welded impeller, the large output of the slotted welded impeller, and the complicated measurement steps of the three-coordinate measuring instrument, if each impeller uses a three-coordinate measuring instrument to measure the coordinate deviation of the shaft disk, it will consume a lot of manpower and material force, resulting in low measurement efficiency of the shaft disk coordinate deviation of the slotted welded impeller

In addition, the high cost of the coordinate measuring machine will result in a high cost of measuring a large number of slotted welded impellers

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