CN219714253U

CN219714253U - Comb gap measuring ruler

Info

Publication number: CN219714253U
Application number: CN202320260544.6U
Authority: CN
Inventors: 毛小菲; 周英华; 刘国清; 邵明宝; 郑斌斌
Original assignee: Csic Longjiang Gh Turbine Co ltd
Current assignee: Csic Longjiang Gh Turbine Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-09-19
Anticipated expiration: 2033-02-20

Abstract

The utility model aims to provide a comb gap measuring ruler which comprises an outside micrometer and a measuring piece, wherein the outside micrometer comprises a fixed end and a movable rod, the fixed end is fixed in position, the movable rod moves to adjust the position of the movable rod and the fixed end, a groove is formed in the fixed end, the measuring piece is inserted into the groove, and the measuring piece is fixed through a locating pin. The utility model improves the existing outside micrometer, solves the problem that the thickness of the deformed lead wire cannot be accurately measured, and improves the measuring efficiency.

Description

Comb gap measuring ruler

Technical Field

The utility model relates to a gas turbine assembly tool, in particular to a tool for measuring radial clearance between a comb tooth and a rotor.

Background

In the assembly process of the gas turbine, friction is easy to generate due to too small clearance between the comb teeth and the rotor, otherwise, a good gas seal effect cannot be formed, so that the clearance between the comb teeth and the rotor is an important index in the assembly process of the gas turbine.

The minimum width of the tip of the comb tooth is 0.25mm (see figure 2), the clearance between the comb tooth and the rotor needs to be measured at four points from top to bottom, left and right in the assembly process, the three points from bottom to left and right can be measured by using a feeler gauge, the clearance at the position right above can not be directly measured due to shielding, and the clearance value is usually obtained indirectly by measuring the thickness of the deformed lead wire after the lead wire is pressed. The common measuring tool cannot accurately measure the actual size due to the fact that the measuring surface is oversized, and the measuring tool usually adopts an enlarged projection mode for measuring, and is accurate but low in efficiency.

Disclosure of Invention

The utility model aims to provide a comb gap measuring ruler which can solve the problem that the thickness of a deformed lead wire cannot be accurately measured and can improve the measuring efficiency.

The purpose of the utility model is realized in the following way:

the utility model relates to a comb gap measuring ruler, which is characterized in that: including external micrometer, measuring piece, external micrometer includes stiff end and movable rod, thereby stiff end fixed position, and thereby the movable rod removes the position of adjusting its and stiff end, and the stiff end processing has the recess, inserts measuring piece in the recess, and measuring piece passes through the locating pin fixed.

The utility model may further include:

1. the thickness of the portion of the measuring sheet protruding from the end face of the fixed end was 0.3.+ -. 0.1mm, and the height was 2.5.+ -. 0.1mm.

The utility model has the advantages that: the utility model improves the existing outside micrometer, solves the problem that the thickness of the deformed lead wire cannot be accurately measured, and improves the measuring efficiency.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic view of a grate.

Detailed Description

The utility model is described in more detail below, by way of example, with reference to the accompanying drawings:

in connection with fig. 1, the measuring principle of the present utility model is consistent with that of an outside micrometer, one end of which is fixed and the other end of which is position-adjusted by the movement of a movable rod, thereby measuring the size.

A groove is processed at the fixed end of the outside micrometer 1, and the inserted measuring piece 2 is fixed by a positioning 3. The thickness of the portion of the measuring sheet 2 protruding from the end face of the fixed end was 0.3mm, and the height was 2.5mm. The boss can closely laminate with the lead wire, and the accuracy of measurement of assurance.

And (3) aligning one end of the lead wire, which is deformed, with the measuring piece 2 of the micrometer, and rotating the movable rod of the micrometer to enable the movable rod to be attached to one undeformed end of the lead wire. Because the lead wire is softer and easy to change, the movable rod is not required to be screwed continuously after the movable side rod is attached to the lead wire, so that the lead wire is prevented from deforming, and the final measurement result is not influenced.

Claims

1. A comb tooth clearance gauge, characterized by: including external micrometer, measuring piece, external micrometer includes stiff end and movable rod, thereby stiff end fixed position, and thereby the movable rod removes the position of adjusting its and stiff end, and the stiff end processing has the recess, inserts measuring piece in the recess, and measuring piece passes through the locating pin fixed.

2. The comb gap measuring scale according to claim 1, characterized in that: the thickness of the portion of the measuring sheet protruding from the end face of the fixed end was 0.3.+ -. 0.1mm, and the height was 2.5.+ -. 0.1mm.