CN104677440A - System and method for measuring flow rate of fuel gas online - Google Patents
System and method for measuring flow rate of fuel gas online Download PDFInfo
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- CN104677440A CN104677440A CN201310625881.1A CN201310625881A CN104677440A CN 104677440 A CN104677440 A CN 104677440A CN 201310625881 A CN201310625881 A CN 201310625881A CN 104677440 A CN104677440 A CN 104677440A
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Abstract
The invention creatively applies to online measuring of flow rate of fuel gas. A system and a method for measuring the flow rate of the fuel gas online can be used as reliable means for comparing flow rate of different test stands or a turbine flow meter and a fuel gas calibration method for calibrating online. With the adoption of the measurement method, a confidence coefficient of acquired data can be increased. The system for measuring the flow rate of the fuel gas online is that a measuring cylinder is mounted on a movable stand; the measuring cylinder comprises a barrel, a measuring cylinder body, a piston, a piston rod and limiting devices; the piston is positioned in the measuring cylinder body and divides the measuring cylinder body into a left cavity and a right cavity; an oil inlet and an oil outlet are respectively formed in the left cavity and the right cavity; pneumatic ball valves are mounted on fuel pipelines of the oil inlet and the oil outlet; two ends of the piston rod extend out from the measuring cylinder body, and the end equipped with a grating indication probe is positioned on a grating; the limiting devices for limiting the piston in moving are mounted at two inner ends of the measuring cylinder; a measuring and control system is used for measuring and calculating the grating indication probe as well as turning on and off the pneumatic ball valves.
Description
Technical field
The invention is applicable to the on-line measurement of fuel flow.Can as the right reliable means of throughput ratio between different tests platform, also can as turbo flow meter on-line calibration fuel oil calibration steps.By this measuring method, improve the degree of confidence of image data.
Background technology
The main cause affecting semi physical test flow measuring accuracy is measuring accuracy and the flow rate test environment of flowmeter.Periodic calibrating answered by flowmeter, but the demarcation of flowmeter in the past all entrusts the measurement unit with specialty to verify.Need before censorship to pull down flowmeter from equipment, waste time and energy, add the mode disunity of demarcation, the measuring error of flowmeter is still larger, for this reason with periodic maintenance flowmeter.And flow rate test often carries out under different temperature and pressure environment, therefore also need to set up a set of gauge measurement system, react the actual numerical value of the flow under varying environment.
Summary of the invention
The object of the invention is: find a kind of can as the right reliable means of throughput ratio between different tests platform, also can as turbo flow meter on-line calibration fuel oil calibration steps in hardware-in-the-loop simulation test device.
The technical scheme of the invention is:
A kind of system of fuel flow on-line measurement, native system comprises metering cylinder, stand, grating and TT&C system, wherein, metering cylinder is arranged on moveable stand, metering cylinder comprises cylinder barrel, metering cylinder, piston, piston rod and stop means, piston is positioned at metering cylinder, metering cylinder is divided into left cavity and right cavity, an oil-in and an oil-out is respectively had in left cavity and right cavity, the fuel pipe of oil-in and oil-out is all equipped with pneumatic ball valve, metering cylinder is stretched out at the two ends of piston rod, wherein, the one end being provided with grating instruction probe is positioned on grating, piston is moved and carries out spacing stop means and be installed on two ends in metering cylinder, described TT&C system, for measuring grating instruction probe and resolve, and the opening and closing of pneumatic ball valve.
A method for fuel flow on-line measurement, comprises the following steps:
The first step, the pipe interface of the fuel pipe measurand of device is connected, the oil-in in left chamber and the pipeline inlet communication of measurand, and the oil-out in right chamber is communicated with the tube outlet of measurand, forms forward loop; The oil-in in right chamber and the pipeline inlet communication of measurand, the oil-out in left chamber is communicated with the tube outlet of measurand, forms return circuit; Emergency bypass and safety valve is also provided with outlet in the pipeline import of measurand.
Second step, TT&C system controls four pneumatic ball valves and emergency bypass standard-sized sheet; Open the pipeline import of measurand and the valve of outlet, actuating medium enters in the system of fuel flow on-line measurement, ensures that internal system air is all discharged;
3rd step, carry out forward loop test: under original state, piston is in volume pipe left end, close the pneumatic ball valve of the oil-out in left chamber and the oil-in in right chamber again, actuating medium promotes piston and moves right, and drives grating instruction probe to move on grating, TT&C system, for measuring grating instruction probe and resolve, obtain the flow value of the actuating medium by measurand;
Carry out return circuit test: under original state, piston is in volume pipe right-hand member, close the pneumatic ball valve of the oil-in in left chamber and the oil-out in right chamber again, actuating medium promotes piston to left movement, grating instruction probe is driven to move on grating, TT&C system, for measuring grating instruction probe and resolve, obtains the flow value of the actuating medium by measurand;
In test process, TT&C system detects when piston triggers stop means, controls the valve opening of emergency bypass, and the pneumatic ball valve controlling to open is closed; After the installation site of stop means should ensure that it is triggered by piston, left chamber or right chamber still have enough volumes to have the sufficient time to open to make emergency bypass.
The advantage of the invention is:.
1. dynamic response is fast, can realize the flow measurement of dynamic volume method;
2. Laboratory Calibration expanded uncertainty: 0.05%, k=2; Field calibration expanded uncertainty: 0.2%, k=2;
3. can realize continuous coverage, work efficiency is high;
4. fluid-tight is run, pollution-free, fire prevention, explosion-proof, is applicable to high and low temperature fuel flow and measures.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram of fuel flow on-line measurement principle of work under a kind of Aeroengine Control Systems of the present invention.Wherein, 1-metering cylinder, 2-stand, 3-grating, 4-TT&C system, 5-pipe system, 6-measurand
Principle of work of the present invention:
A kind of system of fuel flow on-line measurement, native system comprises metering cylinder, stand, grating and TT&C system, wherein, metering cylinder is arranged on moveable stand, metering cylinder comprises cylinder barrel, metering cylinder, piston, piston rod and stop means, piston is positioned at metering cylinder, metering cylinder is divided into left cavity and right cavity, an oil-in and an oil-out is respectively had in left cavity and right cavity, the fuel pipe of oil-in and oil-out is all equipped with pneumatic ball valve, metering cylinder is stretched out at the two ends of piston rod, wherein, the one end being provided with grating instruction probe is positioned on grating, piston is moved and carries out spacing stop means and be installed on two ends in metering cylinder, described TT&C system, for measuring grating instruction probe and resolve, and the opening and closing of pneumatic ball valve.
A method for fuel flow on-line measurement, comprises the following steps:
The first step, the pipe interface of the fuel pipe measurand of device is connected, the oil-in in left chamber and the pipeline inlet communication of measurand, and the oil-out in right chamber is communicated with the tube outlet of measurand, forms forward loop; The oil-in in right chamber and the pipeline inlet communication of measurand, the oil-out in left chamber is communicated with the tube outlet of measurand, forms return circuit; Emergency bypass and safety valve is also provided with outlet in the pipeline import of measurand.
Second step, TT&C system controls four pneumatic ball valves and emergency bypass standard-sized sheet; Open the pipeline import of measurand and the valve of outlet, actuating medium enters in the system of fuel flow on-line measurement, ensures that internal system air is all discharged;
3rd step, carry out forward loop test: under original state, piston is in volume pipe left end, close the pneumatic ball valve of the oil-out in left chamber and the oil-in in right chamber again, actuating medium promotes piston and moves right, and drives grating instruction probe to move on grating, TT&C system, for measuring grating instruction probe and resolve, obtain the flow value of the actuating medium by measurand;
Carry out return circuit test: under original state, piston is in volume pipe right-hand member, close the pneumatic ball valve of the oil-in in left chamber and the oil-out in right chamber again, actuating medium promotes piston to left movement, grating instruction probe is driven to move on grating, TT&C system, for measuring grating instruction probe and resolve, obtains the flow value of the actuating medium by measurand;
In test process, TT&C system detects when piston triggers stop means, controls the valve opening of emergency bypass, and the pneumatic ball valve controlling to open is closed; After the installation site of stop means should ensure that it is triggered by piston, left chamber or right chamber still have enough volumes to have the sufficient time to open to make emergency bypass.
When resolving: flowmeter upstream and downstream requires the temperature, the pressure that are provided with temperature, fluid measured by pressure transducer, utilizes volume pipe material coefficient of volumetric expansion to revise high temperature or low temperature lower volume pipe useful volume, obtains high-precision flow.
Embodiment:
Embodiment: as shown in Figure 1, this measuring method is divided into positive stroke align mode, revesal align mode, attonity state and full-gear one of four states.The course of work is as follows:
System is connected with measurand interface, F1, F2, F3, F4 and F5 five valve wide opens; Switch measurand respective valves, fuel oil enters in system and metering cylinder, ensures that internal system air is all discharged.
Under metering cylinder original state, piston is in volume pipe left end, determines that valve F2, F3 and F5 open, and valve F1 and F4 closes; Preliminary work is ready, valve-off F5, and fuel oil promotes piston and moves right, and completes positive stroke state down-off meter calibrating process; When triggering right chamber stop means, valve F5 opens, and valve F2 and F3 closes, and after ensureing in design that the installation site of stop means should ensure that it is triggered by piston, the right chamber of metering cylinder still has enough volumes guarantee valve F5 to have the sufficient time to open.
After Open valve F1 and valve F4, valve-off F5, fuel oil promotes piston to left movement, realizes revesal calibration; When triggering left chamber stop means, Open valve F5, valve-off F1 and valve F4; Equally, after ensureing in design that the installation site of stop means should ensure that it is triggered by piston, the left chamber of metering cylinder still have enough volumes to ensure valve F5 has the sufficient time to open.
After completing the calibration of certain flow point, Open valve F5, valve-off F1, F2, F3 and F4, measuring system is in attonity state.
Claims (4)
1. the system of a fuel flow on-line measurement, it is characterized in that, native system comprises metering cylinder, stand, grating and TT&C system, wherein, metering cylinder is arranged on moveable stand, metering cylinder comprises cylinder barrel, metering cylinder, piston, piston rod and stop means, piston is positioned at metering cylinder, metering cylinder is divided into left cavity and right cavity, an oil-in and an oil-out is respectively had in left cavity and right cavity, the fuel pipe of oil-in and oil-out is all equipped with pneumatic ball valve, metering cylinder is stretched out at the two ends of piston rod, wherein, the one end being provided with grating instruction probe is positioned on grating, piston is moved and carries out spacing stop means and be installed on two ends in metering cylinder, described TT&C system, for measuring grating instruction probe and resolve, and the opening and closing of pneumatic ball valve.
2. a method for fuel flow on-line measurement, is characterized in that, comprises the following steps:
The first step, the pipe interface of the fuel pipe measurand of device is connected, the oil-in in left chamber and the pipeline inlet communication of measurand, and the oil-out in right chamber is communicated with the tube outlet of measurand, forms forward loop; The oil-in in right chamber and the pipeline inlet communication of measurand, the oil-out in left chamber is communicated with the tube outlet of measurand, forms return circuit; Emergency bypass and safety valve is also provided with outlet in the pipeline import of measurand;
Second step, TT&C system controls four pneumatic ball valves and emergency bypass standard-sized sheet; Open the pipeline import of measurand and the valve of outlet, actuating medium enters in the system of fuel flow on-line measurement, ensures that internal system air is all discharged;
3rd step, carry out forward loop test: under original state, piston is in volume pipe left end, close the pneumatic ball valve of the oil-out in left chamber and the oil-in in right chamber again, actuating medium promotes piston and moves right, and drives grating instruction probe to move on grating, TT&C system, for measuring grating instruction probe and resolve, obtain the flow value of the actuating medium by measurand;
Carry out return circuit test: under original state, piston is in volume pipe right-hand member, close the pneumatic ball valve of the oil-in in left chamber and the oil-out in right chamber again, actuating medium promotes piston to left movement, grating instruction probe is driven to move on grating, TT&C system, for measuring grating instruction probe and resolve, obtains the flow value of the actuating medium by measurand;
In test process, TT&C system detects when piston triggers stop means, controls the valve opening of emergency bypass, and the pneumatic ball valve controlling to open is closed.
3. the method for a kind of fuel flow on-line measurement as claimed in claim 2, is characterized in that, in the first step, is also provided with emergency bypass and safety valve in the pipeline import of measurand with outlet.
4. the method for a kind of fuel flow on-line measurement as claimed in claim 2, is characterized in that, in the 3rd step, after the installation site of stop means should ensure that it is triggered by piston, left chamber or right chamber still have enough volumes to have the sufficient time to open to make emergency bypass.
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| CN201310625881.1A CN104677440A (en) | 2013-11-28 | 2013-11-28 | System and method for measuring flow rate of fuel gas online |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505020A (en) * | 2017-09-28 | 2017-12-22 | 青岛软控机电工程有限公司 | Piston volume formula material measuring system |
| CN108168636A (en) * | 2017-11-28 | 2018-06-15 | 中国航发西安动力控制科技有限公司 | RP-3 fuel mass flow measuring methods |
| CN110895204A (en) * | 2018-09-12 | 2020-03-20 | 北京振兴计量测试研究所 | On-site calibration system for flow measurement of test bed of aerospace engine and cleaning method thereof |
| CN110895200A (en) * | 2018-09-12 | 2020-03-20 | 北京振兴计量测试研究所 | On-site calibration system for test bed of aerospace engine and calibration method for measurement and control unit of on-site calibration system |
| CN110895205A (en) * | 2018-09-12 | 2020-03-20 | 北京振兴计量测试研究所 | On-spot calibration system of test bench flow measurement of aeroengine |
| CN110895203A (en) * | 2018-09-12 | 2020-03-20 | 北京振兴计量测试研究所 | On-site calibration method for turbine flowmeter of test bed of aerospace engine |
| CN111157069A (en) * | 2019-12-31 | 2020-05-15 | 浙江大学 | Gas flow continuous measuring device and flow measuring method |
| CN111842292A (en) * | 2020-07-21 | 2020-10-30 | 江苏科技大学 | Surface impurity removal system and method for gas field flow measuring device |
| CN112556765A (en) * | 2019-09-25 | 2021-03-26 | 中国石油天然气股份有限公司 | Reciprocating gas flowmeter and working method thereof |
| CN113030085A (en) * | 2021-02-26 | 2021-06-25 | 深圳先进电子材料国际创新研究院 | Test system and method for monitoring curing volume shrinkage of resin composite material |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505020A (en) * | 2017-09-28 | 2017-12-22 | 青岛软控机电工程有限公司 | Piston volume formula material measuring system |
| CN108168636A (en) * | 2017-11-28 | 2018-06-15 | 中国航发西安动力控制科技有限公司 | RP-3 fuel mass flow measuring methods |
| CN110895200B (en) * | 2018-09-12 | 2021-08-27 | 北京振兴计量测试研究所 | On-site calibration system for test bed of aerospace engine and calibration method for measurement and control unit of on-site calibration system |
| CN110895204A (en) * | 2018-09-12 | 2020-03-20 | 北京振兴计量测试研究所 | On-site calibration system for flow measurement of test bed of aerospace engine and cleaning method thereof |
| CN110895200A (en) * | 2018-09-12 | 2020-03-20 | 北京振兴计量测试研究所 | On-site calibration system for test bed of aerospace engine and calibration method for measurement and control unit of on-site calibration system |
| CN110895205A (en) * | 2018-09-12 | 2020-03-20 | 北京振兴计量测试研究所 | On-spot calibration system of test bench flow measurement of aeroengine |
| CN110895203A (en) * | 2018-09-12 | 2020-03-20 | 北京振兴计量测试研究所 | On-site calibration method for turbine flowmeter of test bed of aerospace engine |
| CN110895204B (en) * | 2018-09-12 | 2021-10-29 | 北京振兴计量测试研究所 | On-site calibration system for flow measurement of test bed of aerospace engine and cleaning method thereof |
| CN110895203B (en) * | 2018-09-12 | 2021-08-27 | 北京振兴计量测试研究所 | On-site calibration method for turbine flowmeter of test bed of aerospace engine |
| CN112556765A (en) * | 2019-09-25 | 2021-03-26 | 中国石油天然气股份有限公司 | Reciprocating gas flowmeter and working method thereof |
| CN111157069A (en) * | 2019-12-31 | 2020-05-15 | 浙江大学 | Gas flow continuous measuring device and flow measuring method |
| CN111842292A (en) * | 2020-07-21 | 2020-10-30 | 江苏科技大学 | Surface impurity removal system and method for gas field flow measuring device |
| CN113030085A (en) * | 2021-02-26 | 2021-06-25 | 深圳先进电子材料国际创新研究院 | Test system and method for monitoring curing volume shrinkage of resin composite material |
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