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Steam turbine full cylinder state flow clearance detection method

A detection method and steam turbine technology, applied in the direction of measuring devices, instruments, and optical devices, can solve the problems of low precision in the flow gap, achieve the effects of improving measurement accuracy, saving manpower and material resources, and shortening delivery time

Inactive Publication Date: 2018-10-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of existing small steam turbines, such as the low accuracy of measuring the flow gap, and the need for repeated assembly, disassembly, detection and other repetitive work during the measurement, and propose a flow gap in the state of a full solid cylinder of the steam turbine Detection method

Method used

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  • Steam turbine full cylinder state flow clearance detection method
  • Steam turbine full cylinder state flow clearance detection method
  • Steam turbine full cylinder state flow clearance detection method

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0023] Embodiment 1: A method for detecting a flow gap in a steam turbine full cylinder state includes the following steps:

[0024] Step 1. In the split and merged states of the diaphragms at all levels, use the laser tracker API-T3 to measure the inner circles of the diaphragms at the shaft sections at all levels and the inner circles of the diaphragms at the rotor blades at all levels;

[0025] Step 2. In the state of dismantling the cylinder, use the laser tracker API-T3 to use the target ball to measure the circular arcs at all levels required for the flow gap of the upper and lower cylinders;

[0026] Step 3, utilize SpatialAnalyzer software to process the data measured in step 1 and step 2, extract the center of circle and diameter;

[0027] Open the measured data in SA, such as fitting a circle or a plane, select the fitting geometry (circle or plane), and select the measurement point to be fitted, after the fitting, check the fitting error, if the fitting If the erro...

specific Embodiment approach 2

[0030] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in the step 1, when the partitions at all levels are split and merged, the laser tracker API-T3 is used to measure the shaft segment partitions at all levels The specific process of the inner circle and the inner circle of the diaphragm at the rotor blades at all levels is as follows:

[0031] Step 11: In order to use the laser tracker to collect the data of the partition, it is necessary to adjust the partition to a horizontal state on the detection platform, and the levelness error is less than 0.05mm; the API-T3 laser tracker is preheated for 20 to 40 minutes, and then Calibration; when measuring half a partition, 6 to 10 positions on the arc are roughly evenly collected on the half partition, and 20 to 100 points are collected for each position;

[0032] Step 1 and 2: When measuring the spliced ​​partitions, it is necessary to place the partitions on the detection platfor...

specific Embodiment approach 3

[0035] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in the step 2, in the state of dismantling the cylinder, the laser tracker API-T3 is used to measure the flow gap requirements of the upper and lower cylinders by using the target ball. The details of arcs at all levels are:

[0036] When measuring the arcs at all levels required by the flow gap on the cylinder, there are some seal teeth on the cylinder, and the seal teeth are sharp and thin arcs. The small steam turbine adopts the steam seal gear seal to seal the internal spaces of the cylinder at all levels, so that the steam generated from the intake end of the steam turbine can flow from the diaphragm and rotor blades as much as possible, and the number and types of seal teeth are more , and the seal tooth and the diaphragm are in a spring connection state. During the measurement process with the target ball, placing the target ball directly on the seal tooth will co...

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Abstract

The invention provides a steam turbine full cylinder state flow clearance detection method, relates to a flow clearance detection method, and aims at solving the problems that the accuracy of presentsmall steam turbine flow clearance measurement is low and multiple times of assembling, disassembling, detection and other repetitive work require to be performed in measurement. The method comprisesthe steps that step one, the separating plate inner circle of each shaft segment and the separating plate inner circle of each of each rotor blade are measured under the split and combining state of each separating plate; step two, each circular arc having the flow clearance requirement of the upper and lower cylinders is measured by using the target sphere under the cylinder disassembling state;step three, the measured data are processed by using the SpatialAnalyzer software and the center of circle and the diameter are extracted; step four, a steam turbine three-dimensional design model isestablished, finite element analysis is performed under the full cylinder and half cylinder state and the compensation value is calculated; and step five, a steam turbine flow clearance calculation model is established and the flow clearance under the full cylinder state is calculated. The steam turbine full cylinder state flow clearance detection method is used for the field of steam turbine digital detection.

Description

technical field [0001] The invention relates to the field of digital detection of steam turbines, in particular to a method for detecting a flow gap in the state of full solid cylinders of the steam turbine. Background technique [0002] In May 2015, in the "Made in China 2025" released by China, marine steam turbines, as the core power equipment of ships, are important components of high-tech ships and one of the top ten fields of intelligent manufacturing in the country. Marine steam turbines use steam to push the rotor to do work, drive the propeller, and change the speed and course of the ship. The special purpose of the marine steam turbine determines that the structure and operation characteristics of the marine steam turbine are quite different from the ordinary steam turbine. The marine steam turbine used for the core power plant of the ship is small in size and complex in composition, but requires high stability during operation. . At present, the assembly process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/14
CPCG01B11/14
Inventor 吕民刘中华高彤周宇鹏高鸣哲李狮伟杜洁瑶
Owner HARBIN INST OF TECH
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