Steam turbine splitter plate throat width measuring chain pearl

Abstract

The present invention provides a partition plate throat width measuring chain bead for a steam turbine, and the measuring chain bead comprises at least more than two global probe heads (1), at least more than two positioning sticks (2) and a measuring device body (3). The global probe heads (1), according to different diameters from small to big or from big to small, each adjacent global probe head (1) of which the center is positioned in the same plane, according to same or different spaces, are arranged in sequence to form a measuring chain, the global probe heads (1) are arranged on the positioning sticks (2) and fixed on the measuring device body (3) through the positioning sticks (2) according to an arrangement way of the global probe head (1). The measuring device is characterized in that the measuring size range is large, the operation is simple, the measuring accuracy is high, and the reading is direct-viewing, flexible and convenient.

Description

technical field [0001] The invention relates to a detection tool, in particular to a measuring tool for measuring the distance between two profiles of a mechanical part with high-precision profile structure features. Background technique [0002] There are many factors affecting the power generation efficiency of a steam turbine, one of which is the influence of the throat width of the steam turbine diaphragm on the steam flow, because the size of the throat width of the steam turbine diaphragm determines the flow area of ​​the steam flow, and the deviation of the flow area will directly Affect the power generation efficiency of the steam turbine. Improving the manufacturing accuracy of the throat width of the steam turbine diaphragm is mainly achieved through the control of the dimension accuracy of the diaphragm throat width during the manufacturing process. Among them, the accuracy of the detection of the diaphragm throat width is directly related to the accuracy of the f...

AI Technical Summary

Problems solved by technology

In the inventor's enterprise and other manufacturing enterprises known to the inventor, the control of the diaphragm throat width accuracy has the same characteristics: the throat width is measured with an oblique feeler gauge, such as figure 1 As shown, the oblique feeler gauge connects the handle and the body of the gauge through threads, but during the detection process, due to the structure of the oblique feeler gauge, the detection result of the throat width is greatly affected by the human factors of the operator. For example, due to the different angles of view used by different inspectors and the uncertainty of the position of the feeler gauge when it moves or swings in the throat to be tested, the reading error is very large, and the inspectors cannot accurately determine whether the detected throat width meets the requirements. The design size of the drawing is not convenient for the manufacturing department to improve the processing method to ensure the throat width of the partition

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