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A Method of Measuring the Runout of Steam Turbine Rotor

A steam turbine rotor and rotor technology, which is applied to measuring devices, mechanical measuring devices, and mechanical devices, etc., can solve problems such as large errors and non-concentricity, and achieve the effects of satisfactory accuracy and good economy.

Active Publication Date: 2018-02-16
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is to solve the problem that the center of rotation of the rotor is not concentric with the geometric center of the rotor when measuring the runout of the rotor by the traditional method, and the problem of large errors is brought about, and proposes a method for measuring the runout of the steam turbine rotor

Method used

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  • A Method of Measuring the Runout of Steam Turbine Rotor
  • A Method of Measuring the Runout of Steam Turbine Rotor
  • A Method of Measuring the Runout of Steam Turbine Rotor

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specific Embodiment approach 1

[0018] Specific embodiment one: a kind of method for measuring steam turbine rotor runout comprises the following steps:

[0019] Step 1: Clamp the rotor on the rotor lathe;

[0020] Step 2: Set the dial indicator on the section to be tested, and arrange a dial indicator on the journals at both ends of the rotor. The number of sections to be tested is n, 3≤n≤5;

[0021] Step 3: Divide the rotor into 8 equal parts at the end of the rotor to obtain 8 phases, and mark them as A, B, C, D, E, F, G, H;

[0022] Step 4: The rotor car rotates at a constant speed of 2 revolutions per minute. When any one of A, B, C, D, E, F, G or H passes the dial indicator, read and record the reading of the dial indicator. Until all 8 phases are read and recorded; define the journal of the rotor adjustment end as 0, the journal of the electric end as T, set the measuring points in the order of 1, 2, 3,..., i from the adjustment end to the electric end, and define The A phase reading of the journal ...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that: in the first step, the positioning reference for clamping the rotor on the rotor lathe is the journal, and the positioning accuracy is less than or equal to 0.05 mm.

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the dial indicator is fixed on the tool holder of the machine tool in the step 4, the tool holder is moved to the vicinity of the tested section, and the bracket is adjusted to make the dial indicator The sub-meter is in contact with the measured section of the rotor in the horizontal direction, and has a certain measured value.

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Abstract

The invention relates to a method for measuring rotor runout of a steam turbine. The method is used for settling a problem of relatively large error caused by decentraction between a rotor rotating center and a rotor geometric center in measuring the rotor runout according to a traditional method. The method is performed according to the following steps of 1, mounting a rotor on a rotor machine tool in a clamping manner; 2, arranging dial gauges on a measured cross section in a manner that one dial gauge is arranged on each of two end journals of the rotor; 3, equally dividing the rotor to eight parts at the end surface of the rotor; 4, making the rotor machine tool rotate in a uniform speed of two circles per minute, reading and recording the dial gauge numbers of eight phases; 5, after finishing measurement of one measured cross section, changing the positions of the dial gauges and repeatedly performing the step 3 and the step 4 until measurement on n measured cross sections is finished; 6, measuring the axial distance between each measuring point and an adjusting end journal measuring point; and 7, computing a runout value according to the step 6. The method of the invention is applied in the field of steam turbine rotor runout measurement.

Description

technical field [0001] The invention relates to a method for measuring the runout of a steam turbine rotor. Background technique [0002] The traditional steam turbine rotor runout measurement method is to clamp the rotor on a horizontal lathe (usually a rotor car), align it with the rotor journal position, and require the alignment accuracy to be within 0.015mm, and then erect Dial indicator, the lathe drives the rotor to rotate at a fixed speed, and the measurer calculates the runout value by reading the difference between the maximum value and the minimum value of the dial gauge full circle data of the measured part. But in actual operation, there are the following problems: [0003] With the continuous development of steam turbine technology, the structural size of the rotor is getting larger and larger, the rotor car that can clamp the rotor is larger, the rotation accuracy of the machine tool is usually greater than 0.02mm, and it is difficult to control the alignment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/00
CPCG01B5/00
Inventor 江鹏远郭飞王永刚王君辉杨彤张利刚马宏程
Owner HARBIN TURBINE
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