CN102252809A - Method for diagnosing state of flow path shaft seal system of steam turbine - Google Patents
Method for diagnosing state of flow path shaft seal system of steam turbine Download PDFInfo
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- CN102252809A CN102252809A CN2011101589132A CN201110158913A CN102252809A CN 102252809 A CN102252809 A CN 102252809A CN 2011101589132 A CN2011101589132 A CN 2011101589132A CN 201110158913 A CN201110158913 A CN 201110158913A CN 102252809 A CN102252809 A CN 102252809A
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- steam turbine
- steam
- operating mode
- seal system
- flow path
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Abstract
The invention belongs to the field of the economic operation analysis of a steam turbine and particularly discloses a method for diagnosing the state of a flow path shaft seal system of the steam turbine. The method disclosed by the invention makes up the inconvenience of the existing measuring computing method which is carried out through tests, does not need to increase measuring points and measuring instruments according to the existing measuring point system at present, carries out computation through the changes of parameters and grasps the change quantity after a computer group is operated for a period of time, thereby diagnosing the sudden change conditions of the shaft seal system of the steam turbine. The method disclosed by the invention has the advantages of simplicity in design, easiness in measurement, high accuracy and timely feedback, makes up the inconvenience of measuring computation which is carried out through the tests, is economic and effective and is suitable for wide popularization and application.
Description
(1) technical field
The invention belongs to steam turbine economic operation analysis field, particularly a kind of method of diagnosing Turbine Flow Path gland seal system state.
(2) background technology
Along with in the world with the attention of the energy-saving and cost-reducing work of China Team, in electricity power enterprise's cost of electricity-generating day by day under the elevated pressure, more and more enterprises begins to pay attention to improving the unit operation economy, reduce cost of electricity-generating, wherein influence Steam Turbine economy bigger and be steam loss, comprise shaft gland steam leakage and flow passage component steam loss.The method that the result of performance test that steam loss is in the past determined to be simple is measured by orifice plate determines, but is actually and can calculates by the present measurement parameter of power plant.
(3) summary of the invention
The present invention provides a kind of method simple, diagnosis precise diagnosis Turbine Flow Path gland seal system state of measuring in order to remedy the deficiencies in the prior art.
The present invention is achieved through the following technical solutions:
A kind of method of diagnosing Turbine Flow Path gland seal system state is characterized in that:
(1) utilize existing measuring point of power plant and instrument, the corresponding operating mode of certification test when choosing thermal Equilibrium Design figure operating mode or unit and putting into operation is the contrast operating mode;
(2) pressure of the governing stage pressure of measuring according to existing measuring point and each bleed off passage is determined the current working of present unit operation;
(3) characteristics that are directly proportional with flow at pressure before the steam turbine intergrade level, utilize the pressure of the section of drawing gas respectively to calculate the steam loss of flow passage component, compare with the data of corresponding operating mode, know the variation of steam loss, the sudden change situation of diagnosis steam turbine gland system.
The present invention has remedied existing not convenient property of carrying out the meter algorithm by test, according to present existing measuring point system of power plant, do not need to increase measuring point and surveying instrument, variation by parameter is calculated, grasp the variable quantity of computer set after operation a period of time, diagnose the sudden change situation of steam turbine gland system.
The present invention is mainly used in the ruuning situation of the Changing Pattern diagnosis steam turbine gland system that utilizes the shaft gland steam leakage that calculates.
The calculating of the steam loss of flow passage component of the present invention is finished by computing machine is online, monitors the size of shaft gland steam leakage in real time.
Simplicity of design of the present invention is measured easily, the accuracy height, and feedback has in time remedied the not convenient property of measuring calculating by test, and economical and effective is suitable for wide popularization and application.
(4) embodiment
Embodiment:
(1) utilizes existing measuring point of power plant and instrument, the corresponding operating mode of certification test when choosing thermal Equilibrium Design figure operating mode or unit and putting into operation is the contrast operating mode, relate to the calculating in the high pressure cylinder, must choose identical pitch and open number operating mode operating mode as a comparison, relate to the calculating in the low pressure (LP) cylinder, the most last this formula of two-stage is inapplicable;
(2) pressure of the governing stage pressure of measuring according to existing measuring point and each bleed off passage is determined the current working of present unit operation;
(3) characteristics that are directly proportional with flow at pressure before the steam turbine intergrade level, utilize the pressure of the section of drawing gas respectively to calculate the air leakage of flow passage component, compare with the data of corresponding operating mode, know the variation of air leakage, the sudden change situation of diagnosis steam turbine gland system.
Calculate and calculate (high pressure cylinder with complexity is an example) as follows:
Wherein:
P
1, G
0, G
L, G
1--steam loss and was taken out flow before one the under-contrast operating mode taken out pressure, main steam flow amount, high pressure cylinder;
P
11, G
01, G
11--one the under-current working taken out pressure, main steam flow amount and is taken out flow;
G
L1--steam loss before the-high pressure cylinder.
This computation process can be finished by computing machine is online, can monitor the size of shaft gland steam leakage in real time, and steam turbine gland system is carried out condition diagnosing.
Claims (2)
1. method of diagnosing Turbine Flow Path gland seal system state is characterized in that:
(1) utilize existing measuring point of power plant and instrument, the corresponding operating mode of certification test when choosing thermal Equilibrium Design figure operating mode or unit and putting into operation is the contrast operating mode;
(2) pressure of the governing stage pressure of measuring according to existing measuring point and each bleed off passage is determined the current working of present unit operation;
(3) characteristics that are directly proportional with flow at pressure before the steam turbine intergrade level, utilize the pressure of the section of drawing gas respectively to calculate the air leakage of flow passage component, compare with the data of corresponding operating mode, know the variation of steam loss, the sudden change situation of diagnosis steam turbine gland system.
2. the method for diagnosis Turbine Flow Path gland seal system state according to claim 1 is characterized in that: the calculating of the steam loss of flow passage component is finished by computing machine is online, monitors the size of shaft gland steam leakage in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101589132A CN102252809A (en) | 2011-06-14 | 2011-06-14 | Method for diagnosing state of flow path shaft seal system of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101589132A CN102252809A (en) | 2011-06-14 | 2011-06-14 | Method for diagnosing state of flow path shaft seal system of steam turbine |
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| Publication Number | Publication Date |
|---|---|
| CN102252809A true CN102252809A (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101589132A Pending CN102252809A (en) | 2011-06-14 | 2011-06-14 | Method for diagnosing state of flow path shaft seal system of steam turbine |
Country Status (1)
| Country | Link |
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| CN (1) | CN102252809A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494895A (en) * | 2011-11-29 | 2012-06-13 | 河北省电力建设调整试验所 | Analyzing method for energy saving and optimization of steam turbine set of power station |
| CN102798502A (en) * | 2012-08-15 | 2012-11-28 | 广东电网公司电力科学研究院 | Method for acquiring air leakage of steam turbine shaft seal system |
| CN103900819A (en) * | 2014-03-27 | 2014-07-02 | 华电国际电力股份有限公司山东分公司 | Method for testing and evaluating energy conservation effect of modified steam seal of flow passage part of steam turbine unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11218002A (en) * | 1998-02-03 | 1999-08-10 | Hitachi Ltd | Steam leakage detector |
| CN1952590A (en) * | 2006-11-10 | 2007-04-25 | 东北电力大学 | On-line monitoring method for variation of through-flow gap of steam turbine |
| US20110038712A1 (en) * | 2009-08-17 | 2011-02-17 | General Electric Company | System and method for measuring efficiency and leakage in a steam turbine |
| CN102004460A (en) * | 2010-11-24 | 2011-04-06 | 东北电力大学 | Online monitoring method for fouling degree of flow passage of steam turbine |
-
2011
- 2011-06-14 CN CN2011101589132A patent/CN102252809A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11218002A (en) * | 1998-02-03 | 1999-08-10 | Hitachi Ltd | Steam leakage detector |
| CN1952590A (en) * | 2006-11-10 | 2007-04-25 | 东北电力大学 | On-line monitoring method for variation of through-flow gap of steam turbine |
| US20110038712A1 (en) * | 2009-08-17 | 2011-02-17 | General Electric Company | System and method for measuring efficiency and leakage in a steam turbine |
| CN102004460A (en) * | 2010-11-24 | 2011-04-06 | 东北电力大学 | Online monitoring method for fouling degree of flow passage of steam turbine |
Non-Patent Citations (2)
| Title |
|---|
| 卢承斌: "汽轮机高压缸内部漏汽的试验分析与处理", 《江苏电机工程》 * |
| 梁建: "基于软测量的汽轮机漏汽故障诊断", 《工程科技Ⅱ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494895A (en) * | 2011-11-29 | 2012-06-13 | 河北省电力建设调整试验所 | Analyzing method for energy saving and optimization of steam turbine set of power station |
| CN102494895B (en) * | 2011-11-29 | 2014-12-10 | 河北省电力建设调整试验所 | Analyzing method for energy saving and optimization of steam turbine set of power station |
| CN102798502A (en) * | 2012-08-15 | 2012-11-28 | 广东电网公司电力科学研究院 | Method for acquiring air leakage of steam turbine shaft seal system |
| CN103900819A (en) * | 2014-03-27 | 2014-07-02 | 华电国际电力股份有限公司山东分公司 | Method for testing and evaluating energy conservation effect of modified steam seal of flow passage part of steam turbine unit |
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Application publication date: 20111123 |