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Rotor-free through-flow measurement method for steam turbine

A technology without rotors and steam turbines, applied in the field of flow measurement, can solve the problems of complex operation, low safety, and increased labor intensity of workers, and achieve the effect of simple operation, high safety, and shortened delivery time

Active Publication Date: 2013-02-27
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of complicated operation, low safety and increased labor intensity of the existing steam turbine flow measuring method, the present invention further proposes a rotorless method for measuring the flow of the steam turbine

Method used

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  • Rotor-free through-flow measurement method for steam turbine

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the specific steps of a method for measuring through-flow without a rotor of a steam turbine described in this embodiment are as follows:

[0023] Step 1. Preparation before measurement and preparation of record card: According to the drawing of the flow gap of the steam turbine assembly, the size of the flow gap is decomposed into the record card of the static part sleeve and the rotor respectively, and the preliminary measurement is compiled according to the characteristics of the two measurements before and after. Record card and precision measurement record card to determine the position of each measurement point;

[0024] Step 2. Preliminary measurement of the axial dimension of the static part sleeve: the measurement of the axial dimension of the stationary part sleeve is to drop the partition sleeve, partition plate and air seal into the lower half of the cylinder under the conditio...

Embodiment

[0039] Take AP1000 million nuclear power unit low-voltage rotorless flow measurement as an example:

[0040] The specific steps of axial clearance measurement for low-voltage rotorless measuring flow of AP1000 million nuclear power units are as follows:

[0041] Step 1. Axial dimension measurement is to measure the lower half of the low-pressure cylinder that has completed the assembly of the diaphragm sleeve, diaphragm and air seal, and has not been equipped with an exhaust guide ring under the state of the cylinder without the rotor. The low-pressure cylinder The horizontal split surface, the end face of the low-voltage inner cylinder ESC, the alignment reference circle of the low-voltage inner cylinder, the planes of the steam inlet side of the baffles at all levels and the steam outlet side planes of the baffles at all levels are cleaned, free of oil, silt and other sundries. The mid-section bolts go out to ensure that there is no light blocking during measurement. The las...

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Abstract

The invention discloses a rotor-free through-flow measurement method for a steam turbine, and relates to a through-flow measurement method, in particular to a rotor-free through-flow measurement method for a steam turbine. The invention solves the problems in the prior art, such as complicated operation, low safety and high labor intensity. Specifically, the method comprises the following steps: doing preparation before measurement and making record cards, performing primary measurement of the axial dimension of a static part sleeve, performing primary measurement of the radial dimension of the static part sleeve, calculating the axial clearance of the static part sleeve and the radial clearance of the static part sleeve, dismounting each part sleeve and machining an eccentric pin and a support key, re-mounting a cylinder after completing the machining, and measuring the axial dimension and radial dimension of the static part sleeve again. The rotor-free through-flow measurement method is used for measuring the through-flow clearance of the static part sleeve of the steam turbine.

Description

technical field [0001] The invention relates to a method for measuring through-flow, in particular to a method for measuring through-flow without a rotor of a steam turbine. Background technique [0002] At present, in the transfer of steam turbines, it is necessary to actually assemble the static parts (cylinders and stationary blades, etc.) and the rotating parts (rotors and moving blades) of the steam turbine, and then check some through-flow transfer clearances. The existing method of measuring flow has the following disadvantages: First, since the rotor and the static sleeve need to be "meeted", both of them need to be assembled before final assembly, and then the assembly clearance should be checked, which requires that the rotor and the cylinder must be in the The delivery can only be carried out after checking the flow gap and adjusting the gap; second, it is necessary to carry out multiple actual assembly of the rotor and the static part sleeve, which increases the ...

Claims

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Application Information

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IPC IPC(8): G01B11/14
Inventor 薛明强柳康马宏程江鹏远王君辉刘春侯磊妥世花孙鑫李秋红梁小丹
Owner HARBIN TURBINE
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