Micrometer for testing radial wall thickness of inserted steam seal ring

Abstract

The invention discloses a micrometer for testing radial wall thickness of an inserted steam seal ring. The micrometer comprises a micrometer stand, a measuring anvil, a micrometric screw, a locking device, a fixing sleeve, a microdrum and a force measuring device, wherein the micrometer stand is U-shaped; the measuring anvil is mounted at one end of the micrometer stand; the fixing sleeve is screwed at the other end of the micrometer stand; the micrometric screw and the force measuring device are respectively screed into two ends of the microdrum; the microdrum is screwed on the fixing sleeve and the locking device is mounted; the measuring anvil and the micrometric screw mounted at two ends of the micrometer stand correspond to each other; the measuring anvil is a flaky measuring anvil. The micrometer is simple in structure and convenient to use, and the product manufacturing cost is lowered; as the micrometer has a measuring part deep slot structure that common micrometers do not have, the size of the position near the center of a workpiece can be tested, and measurement on the size from the outer circles to the inner holes of tooth tops of steam seal rings with different axial sizes can be met.

Description

technical field [0001] The invention relates to a device for measuring the wall thickness of a seal ring of a steam turbine, in particular to a micrometer for measuring the radial wall thickness of an insert seal ring. Background technique [0002] At present, most of the steam seal rings used in thermal power steam turbine units are of toothed structure, and its cross-sectional schematic structure is as follows figure 1 , the size A in the figure needs to be accurately measured during the processing of the steam seal ring 8. However, the width of the tooth top of the steam seal insert 9 is only 0.13mm, and the ordinary micrometer can only be placed on a single tooth, such as Figure 6 As shown, it is difficult to control the contact position between the common measuring anvil 10 and the insert 9 during the measurement process, resulting in large measurement errors. It greatly affects the measurement accuracy of ordinary micrometers. Contents of the invention [0003] Th...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the steam seal rings used in thermal power steam turbine units are of toothed structure, and its cross-sectional schematic structure is as follows figure 1 , the size A in the figure needs to be accurately measured during the processing of the steam seal ring 8, but the width of the tooth tip of the steam seal insert 9 is only 0.13mm, and the ordinary micrometer can only be placed on a single tooth, such as Image 6 As shown, it is difficult to control the contact position between the common measuring anvil 10 and the insert 9 during the measurement process, which makes the measurement error larger

Greatly affects the measurement accuracy of ordinary micrometers

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