CN107219045A - The fuel valve leak testing method and system of a kind of gas turbine - Google Patents
The fuel valve leak testing method and system of a kind of gas turbine Download PDFInfo
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- CN107219045A CN107219045A CN201610158152.3A CN201610158152A CN107219045A CN 107219045 A CN107219045 A CN 107219045A CN 201610158152 A CN201610158152 A CN 201610158152A CN 107219045 A CN107219045 A CN 107219045A
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- valve
- pressure
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- leak
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to the fuel valve leak testing method and system of a kind of gas turbine, this method includes：When gas turbine starts, detection gas inlet pressure and gas turbine rotary speed value and igniting in real time allows signal；Judge whether detected value meets gas leak-testing and start condition；If not meeting, continue to detect；If meeting, tightness test is carried out to pressure-regulating valve, after test passes through, then tightness test is carried out to control valve/atmospheric valve, finally will leak out the gases used discharge of test.In valve leak test process, if the direct tripping grinder of test crash gas turbine.
Description
Technical field
The present invention relates to the detection field of gas turbine, and in particular to a kind of fuel of gas turbine
Valve leak method of testing and system.
Background technology
Gas turbine is the heat discharged during by fuel combustion using gas, liquid as fuel
Amount is transformed into useful work, the vane type dynamic power machine of energy revolution at a high speed.The control bag of gas turbine
The control of fuel quantity and air mass flow is included, wherein the predominantly control of fuel quantity.And fuel quantity
Regulation is completed jointly by pressure-regulating valve and control valve, and the main function of pressure-regulating valve is to maintain
Its pressure between control valve is constant, and control valve then adjusts the flow into combustion chamber.
The function of pressure-regulating valve and control valve determines the importance of the valve.If valve regulated
Characteristic is unstable or tightness is unqualified, then gas turbine fuel amount can not realize accurate control,
Valve leak may also lead to major accident, and these all have a strong impact on the stabilization of gas turbine operation
Property and security.
The content of the invention
The technical problems to be solved by the invention are, before gas turbine igniting, to fuel valve
Each valve of group carries out leak-testing, it is ensured that the tightness of valve, and whole process is supervised
Survey, timely troubleshooting, improve the stability and security of gas turbine operation.
For this purpose, the present invention proposes a kind of fuel valve leak-testing side of gas turbine
Method, methods described includes：
S1. detection gas inlet pressure and gas turbine rotary speed value and igniting allow signal；
S2. judge whether detected value meets gas leak-testing and start condition；
If meeting, step S3 is performed；
If not meeting, return to step S1；
S3. tightness test is carried out to pressure-regulating valve；
If success, step S4 is performed；
If unsuccessful, direct tripping grinder；
S4. turned off after opening pressure-regulating valve；
S5. tightness test is carried out to control valve/atmospheric valve；
If success, step S6 is performed；
If unsuccessful, direct tripping grinder；
S6. the emptying valve between pressure-regulating valve and control valve is opened, test is will leak out used
Gas is discharged；
Further, the gas turbine leak-testing, which starts condition, includes：
Gas inlet pressure value is more than inlet pressure lower limit value；
Gas turbine reaches that cold rotates speed slowly；
Igniting allows signal to be unsatisfactory for.
Further, the step S3 includes：
In the first preset time, judge the first calculated value to be multiplied by between the first predetermined coefficient and valve and press
The relation of power measured value.If the first calculated value is multiplied by the first predetermined coefficient more than or equal to pressure between valve
Measured value, then be successfully tested, conversely, then unsuccessful.
Further, pressure measuring value includes between valve in the step S3：
Pressure measxurement has three measuring points between pressure-regulating valve and control valve valve, chooses three measuring point institutes
The intermediate value of measuring pressure is used as pressure measuring value between valve.
Further, the step S4 includes：
Default second time；
After the completion of step S3, pressure-regulating valve is opened, is continued after second time, pressure is closed
Force regulating valve.
Further, the step S5 includes：
In the 3rd preset time, judge the second calculated value to be multiplied by between the second predetermined coefficient and valve and press
The relation of power measured value.If the second calculated value is multiplied by the second predetermined coefficient less than or equal to pressure between valve
Measured value, then be successfully tested, conversely, then unsuccessful.
Further, the step S6 includes：
Default 4th time；
The emptying valve between pressure-regulating valve and control valve is opened, is continued after the 4th time
Leak-testing pass signal is set.
The invention also provides a kind of fuel valve leak testing method applied to gas turbine
Fuel valve leak-testing control system, the system includes：Data acquisition unit, controller,
Fuel valve group, man-machine interface；
The man-machine interface is electrically connected with the controller, the whole flow process tested for monitoring leakage,
The parameter of each process is shown or changed, and test failure situation can be checked.
The controller is electrically connected with the data acquisition unit, fuel valve group respectively；
The data acquisition unit will detect that signal is transmitted to the controller, the controller according to
The detection signal, judges that leak-testing starts each valve in condition, control fuel valve group
Unlatching and closing, pressure judges whether valve leaks before and after comparing valve.
Further, the data acquisition unit includes：
First pressure sensor, for detecting the gas inlet pressure；
Second pressure sensor, for detecting pressure between pressure-regulating valve and control valve；
Speed probe, the rotating speed for detecting gas turbine.
The present invention compared with prior art, the technique effect with advantages below and high-lighting：①
Engineering adaptability is strong, and whole invention completely can be based on current existing fuel valve system, to combustion
A large amount of transformations requirement of gas-turbine auxiliary system, it is easy to Project Realization；2. strong antijamming capability,
Consider the valve regulating characteristic being likely to occur in real process unstable, can still ensure fuel
The validity of valve leak test；3. algorithm logic is realized simple, it is easy in combustion engine control or auxiliary
In machine control system, the control and monitoring to whole valve leak test process are realized, is improved
Gas turbine operation stability and security.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood from by reference to accompanying drawing, accompanying drawing is to show
Meaning property and should not be construed as carrying out the present invention any limitation, in the accompanying drawings：
Fig. 1 shows a kind of fuel valve leak testing method schematic flow sheet of gas turbine；
Fig. 2 shows a kind of fuel valve leak-testing Control system architecture signal of gas turbine
Figure；
Fig. 3 shows the fuel valve leak testing method flow of the gas turbine in practical application
Schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is described in detail.
The embodiment of the present invention proposes a kind of fuel valve leak testing method of gas turbine, such as
Shown in Fig. 1, the methods described includes：
S1. detection gas inlet pressure and gas turbine rotary speed value and igniting allow signal.
S2. judge whether detected value meets gas leak-testing and start condition.
If meeting, step S3 is performed；
If not meeting, return to step S1；
In the embodiment of the present invention, gas inlet pressure lower limit value is set to 2.1Mpa, and stop valve is opened
Afterwards, gas inlet pressure value is detected, it is ensured that the pressure value is more than this lower limit value, makes gas pressure
Meet leak-testing demand.
Wherein, combustion engine speed setting is that cold rotates speed, i.e. gas turbine rated speed slowly
8.4%.The Rotating speed measring of gas turbine rotor is provided with three sampled points, takes its intermediate value as combustion
The rotating speed of gas-turbine, then divided by above-mentioned gas turbine rated speed, so as to obtain rotating speed percentage
Than, you can in step s 2, judge whether rotating speed percentage reaches the 8.4% of rated speed, from
And determine whether the rotating speed of gas turbine has reached that cold rotates speed slowly.
, wherein it is desired to allow signal to carry out sample detecting igniting, it is ensured that leak-testing is in igniting
Open and carried out before machine.
According to above-mentioned set content, it is more than pressure low limit value when meeting gas inlet pressure, and
Gas turbine rotary speed reaches that cold rotates speed slowly, and enabled condition of lighting a fire is when being unsatisfactory for, and starts
Carry out valve leak test.When wherein one or more are discontented with corresponding above-mentioned condition, then
Proceed to detect or manually investigate failure.
S3. tightness test is carried out to pressure-regulating valve.
Specifically, the step S3 includes：
In the first preset time, judge the first calculated value to be multiplied by between the first predetermined coefficient and valve and press
The relation of power measured value.If the first calculated value is multiplied by the first predetermined coefficient more than or equal to pressure between valve
Measured value, then be successfully tested, conversely, then unsuccessful.
In the embodiment of the present invention, the first preset time may be set to 30 seconds, and the first calculated value is the
The inlet pressure level that one pressure sensor is measured, the first predetermined coefficient is set to pressure between 0.14, valve
Measured value takes the intermediate value of three measuring points.
S4. turned off after opening pressure-regulating valve.
Specifically, the step S4 includes：
Default second time；
After the completion of step S3, pressure-regulating valve is opened, is continued after second time, pressure is closed
Force regulating valve.
In the embodiment of the present invention, it can set for the second time as 6 seconds.
S5. tightness test is carried out to control valve/atmospheric valve.
Specifically, the step S5 includes：
In the 3rd preset time, judge the second calculated value to be multiplied by between the second predetermined coefficient and valve and press
The relation of power measured value.If the second calculated value is multiplied by the second predetermined coefficient less than or equal to pressure between valve
Measured value, then be successfully tested, conversely, then unsuccessful.
In the embodiment of the present invention, the 3rd preset time can be set to 10 seconds, and the second calculated value is step
When second time described in S4 reaches, the latched value of pressure measuring value, the second predetermined coefficient between valve
It is set to the intermediate value that pressure measuring value between 0.98, valve takes three measuring points.
S6. the emptying valve between pressure-regulating valve and control valve is opened, test is will leak out used
Gas is discharged.
Specifically, the step S6 includes：
Default 4th time；
The emptying valve between pressure-regulating valve and control valve is opened, is continued after the 4th time
Leak-testing pass signal is set.
In the embodiment of the present invention, it can set for the 4th time as 30 seconds.
The embodiment of the present invention also proposed a kind of fuel valve applied to gas turbine and leak survey
The fuel valve leak-testing control system of method for testing, as shown in Fig. 2 the system includes：People
Machine interface 101, controller 102, data acquisition unit 103, fuel valve group 104.
The man-machine interface 101 is electrically connected with controller 102, for the whole of monitoring leakage test
Flow, shows or changes the parameter of each process, and can check test failure situation.
The controller 102 is electric with the data acquisition unit 103, fuel valve group 104 respectively
Connection；
The data acquisition unit 103 will detect that signal is transmitted to the controller 102, the control
Device 102 judges that leak-testing starts condition, controls fuel valve group according to the detection signal
The unlatching and closing of the valve of each in 104, pressure judges whether valve leaks before and after comparing valve.
Preferably, the data acquisition unit includes：
First pressure sensor, for detecting the gas inlet pressure；
Second pressure sensor, for detecting pressure between pressure-regulating valve and control valve；
Speed probe, the rotating speed for detecting gas turbine.
Fig. 3 is the fuel valve leak testing method flow signal of the gas turbine in practical application
Figure, as shown in figure 3, including：Leak-testing allows, pressure-regulating valve tightness is tested, control
Valve processed/atmospheric valve tightness test, valve test rear venting terminate.It is specific as follows：
Gas turbine is pressed after enabled instruction, and main protection is set up, and controller starts collection, and each leads to
The signal in road, when the inlet pressure level detected by first pressure sensor is more than pressure low limit
Value, detects that calculating obtained gas turbine rotary speed percentage reaches 8.4% volume by speed probe
Determine rotating speed, and logical signal igniting allows to be false, being sent when conditions above is all met allows leakage
Test signal.
Pressure-regulating valve tightness is tested：
Leak-testing starts, and controller receives this signal, and issues instructions to fuel valve group,
Open stop valve, ventilation valve, atmospheric valve are closed.Thus before gas pressurized to pressure-regulating valve,
Pressure before pressure-regulating valve is set up.Make following judgement in controller：In 30 second time, such as
The leadage coefficients of pressure value * first are less than pressure value between valve before fruit pressure-regulating valve, illustrate that pressure is adjusted
Section valve is leaked, then sends alarm and tripping grinder immediately.If pressure-regulating valve tightness
Test passes, then carry out next step test.
After pressure-regulating valve test passes, controller, which sends instruction, opens pressure-regulating valve, and 6
Controller sends instruction again after second closes pressure-regulating valve, then pressure-regulating valve and control valve
Between pressure set up.
Control valve/atmospheric valve tightness test：
Make following judgement in controller：In 10 second time, if pressure measuring value is less than between valve
The second leadage coefficients of pressure latched value * between valve, illustrate that control valve or atmospheric valve are leaked, then
Alarm and tripping grinder are sent immediately.If control valve/atmospheric valve tightness test passes,
Carry out next step test.
Controller, which sends instruction, opens atmospheric valve dead electricity, the gas between pressure-regulating valve and control valve
Body is discharged, and after 30 seconds, leak-testing pass signal is true.
In said process, the implementation status of whole leak-testing can be monitored from man-machine interface, from
Also parameter can be checked or changed on interface, and any test process breaks down, all can be on interface
Show, facilitate rapid positioning searching reason.
The embodiment of the present invention propose a kind of gas turbine fuel valve leak testing method and
System, realizes the control and monitoring of whole valve leak test process, improves gas turbine
Operation stability and security.
In the present invention, term " first ", " second " are only used for describing purpose, and can not manage
Solve to indicate or imply relative importance.Term " multiple " refers to two or more, unless
Separately there is clear and definite restriction.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
For those skilled in the art, the present invention can have various modifications and variations.It is all this
Within the spirit and principle of invention, any modification, equivalent substitution and improvements made etc. all should
Within protection scope of the present invention.
Claims (9)
1. the fuel valve leak testing method of a kind of gas turbine, it is characterised in that methods described includes：
S1. detection gas inlet pressure and gas turbine rotary speed value and igniting allow signal；
S2. judge whether detected value meets gas leak-testing and start condition；
If meeting, step S3 is performed；
If not meeting, return to step S1；
S3. tightness test is carried out to pressure-regulating valve；
If success, step S4 is performed；
If unsuccessful, direct tripping grinder；
S4. turned off after opening pressure-regulating valve；
S5. tightness test is carried out to control valve/atmospheric valve；
If success, step S6 is performed；
If unsuccessful, direct tripping grinder；
S6. the emptying valve between pressure-regulating valve and control valve is opened, the gases used discharge of test is will leak out.
2. method according to claim 1, it is characterised in that the gas turbine leak-testing, which starts condition, to be included：
Gas inlet pressure value is more than inlet pressure lower limit value；
Gas turbine reaches that cold rotates speed slowly；
Igniting allows signal to be unsatisfactory for.
3. method according to claim 1, it is characterised in that the step S3 includes：
In the first preset time, judge that the first calculated value is multiplied by the relation of pressure measuring value between the first predetermined coefficient and valve.If the first calculated value is multiplied by the first predetermined coefficient more than or equal to pressure measuring value between valve, it is successfully tested, conversely, then unsuccessful.
4. method according to claim 3, it is characterised in that pressure measuring value includes between the valve：
Pressure measxurement has three measuring points between pressure-regulating valve and control valve valve, and the intermediate value for choosing three measuring point institute measuring pressures is used as pressure measuring value between valve.
5. method according to claim 1, it is characterised in that the step S4 includes：
Default second time；
After the completion of step S3, pressure-regulating valve is opened, is continued after second time, closing presure regulating valve.
6. method according to claim 1, it is characterised in that the step S5 includes：
In the 3rd preset time, judge that the second calculated value is multiplied by the relation of pressure measuring value between the second predetermined coefficient and valve.If the second calculated value is multiplied by the second predetermined coefficient less than or equal to pressure measuring value between valve, it is successfully tested, conversely, then unsuccessful.
7. method according to claim 1, it is characterised in that the step S6 includes：
Default 4th time；
The emptying valve between pressure-regulating valve and control valve is opened, continues leak-testing pass signal after the 4th time and is set.
8. the fuel valve leak-testing control system of a kind of gas turbine applied to claim 1 to 7 any one methods described, it is characterised in that the system includes：Data acquisition unit, controller, fuel valve group, man-machine interface；
The man-machine interface is electrically connected with the controller, the whole flow process tested for monitoring leakage, shows or change the parameter of each process, and can check test failure situation.
The controller is electrically connected with the data acquisition unit, fuel valve group respectively；
The data acquisition unit will detect that signal is transmitted to the controller, and the controller judges that leak-testing starts the unlatching and closing of each valve in condition, control fuel valve group, pressure judges whether valve leaks before and after comparing valve according to the detection signal.
9. method according to claim 8, it is characterised in that the data acquisition unit includes：
First pressure sensor, for detecting the gas inlet pressure；
Second pressure sensor, for detecting pressure between pressure-regulating valve and control valve；
Speed probe, the rotating speed for detecting gas turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610158152.3A CN107219045A (en) | 2016-03-21 | 2016-03-21 | The fuel valve leak testing method and system of a kind of gas turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610158152.3A CN107219045A (en) | 2016-03-21 | 2016-03-21 | The fuel valve leak testing method and system of a kind of gas turbine |
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| CN107219045A true CN107219045A (en) | 2017-09-29 |
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| CN201610158152.3A Pending CN107219045A (en) | 2016-03-21 | 2016-03-21 | The fuel valve leak testing method and system of a kind of gas turbine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697348A (en) * | 2020-12-29 | 2021-04-23 | 东台市建东机械制造有限公司 | Fuel leakage test system of diesel engine fuel injection system |
| CN113237601A (en) * | 2021-06-17 | 2021-08-10 | 国网天津市电力公司电力科学研究院 | Tightness test method for preventing overspeed of backpressure unit |
| CN113324705A (en) * | 2021-04-23 | 2021-08-31 | 国网天津市电力公司电力科学研究院 | Gas turbine unit valve tightness test method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697348A (en) * | 2020-12-29 | 2021-04-23 | 东台市建东机械制造有限公司 | Fuel leakage test system of diesel engine fuel injection system |
| CN113324705A (en) * | 2021-04-23 | 2021-08-31 | 国网天津市电力公司电力科学研究院 | Gas turbine unit valve tightness test method |
| CN113237601A (en) * | 2021-06-17 | 2021-08-10 | 国网天津市电力公司电力科学研究院 | Tightness test method for preventing overspeed of backpressure unit |
| CN113237601B (en) * | 2021-06-17 | 2024-05-24 | 国网天津市电力公司电力科学研究院 | Tightness test method for preventing overspeed of back pressure unit |
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