CN110617170A - Multi-nozzle flow measurement system and measurement method thereof - Google Patents
Multi-nozzle flow measurement system and measurement method thereof Download PDFInfo
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- CN110617170A CN110617170A CN201910617660.7A CN201910617660A CN110617170A CN 110617170 A CN110617170 A CN 110617170A CN 201910617660 A CN201910617660 A CN 201910617660A CN 110617170 A CN110617170 A CN 110617170A
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- oil
- nozzle
- flow measurement
- double
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/96—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by specially adapted arrangements for testing or measuring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
Abstract
The invention relates to a multi-nozzle flow measurement system, which comprises a computer control system, a double-oil-way hydraulic oil supply system and a flow measurement system, wherein the double-oil-way hydraulic oil supply system comprises a hydraulic oil supply system and a flow measurement system; the invention also adopts the same basic platform, and can complete the flow tests of a plurality of nozzles in different time periods; the temperature control system is adopted to control the temperature of the aviation kerosene in real time, the temperature parameters are led into the computer system in real time to carry out temperature compensation calculation, and meanwhile, volatilization is reduced, and safety is improved; the single oil way, the double oil ways and the single and double oil ways of the nozzle can be simultaneously carried out, and the accurate measurement can be realized. The nozzle has the innovative advantages that the nozzle can be measured in a linear mode, a circular mode, an oval mode and the like without limitation on the mode of the nozzle. These advantages are utilized to achieve a high accuracy multi-nozzle flow measurement system. The invention also relates to a measuring method for measuring the flow of the fuel nozzle by adopting the measuring system.
Description
Technical Field
The invention belongs to the technical test field of fuel injection systems of aerospace engines, and particularly relates to a multi-nozzle flow measuring system and a measuring method for measuring the flow of a fuel nozzle by adopting the measuring system.
Background
At present, in the field of aerospace, detection and metering systems of fuel injection systems of engines are self-made, and nozzle flow detection is a necessary link in the manufacturing process of the engines. On the basis of simulating the actual working condition of the fuel nozzle, a measuring method for measuring the nozzle flow by using a weighing sensor is provided, oil density compensation is carried out by measuring the oil temperature in real time, and the nozzle flow measurement precision is improved. The nozzle flow detection system designed based on the virtual instrument technology has the characteristic of high efficiency by using a simple hydraulic loop. Fuel injectors are one of the key components of an engine. In order to ensure sufficient oil supply of the engine, the flow detection of the nozzle must be carried out under various pressure working conditions. A plurality of nozzles with various specifications are connected according to a certain mode and then flow detection is carried out, so that the detection efficiency is improved, and the actual working condition of the nozzles can be well simulated. Based on the thought, a set of novel modern high-precision control multi-nozzle flow measuring system needs to be researched and designed.
Disclosure of Invention
The invention provides a system which is reasonable in structural design and can control a plurality of nozzles to measure flow parameters simultaneously, and aims to solve the technical problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: the system comprises a computer control system, a double-oil-way hydraulic oil supply system and a flow measurement system.
The computer control system comprises computer hardware, a basic operating system and system control software.
The double-oil-way hydraulic oil supply system comprises an oil tank, a thermometer, a temperature controller system, a pump and motor system, an electro-hydraulic proportional pressure valve, an unloading valve and a pressure gauge.
The flow measuring system comprises a double-oil-way injection device with a test nozzle, an oil receiving funnel, a pipeline, a two-position three-way electromagnetic reversing valve, a measuring cylinder with scales, a high-precision weighing sensor, a supporting plate and a switching electromagnetic valve.
The computer control system is connected with the double-oil-way hydraulic oil supply system and the flow measurement system through a data control line; the double-oil-way hydraulic oil supply system is connected with the fuel oil pipe for the flow measuring system.
The invention has the advantages and positive effects that:
firstly, the same basic platform is adopted, and the flow tests of a plurality of nozzles in different time periods can be completed;
secondly, the temperature of the aviation kerosene is controlled in real time by adopting a temperature control system, the temperature parameters are led into a computer system in real time for temperature compensation calculation, and meanwhile, volatilization is reduced, and safety is improved;
thirdly, the single oil way, the double oil ways and the single and double oil ways of the nozzle are simultaneously carried out, and the accurate measurement can be realized.
And fourthly, the nozzle pattern is not limited, and can be measured in a linear mode, a circular mode, an oval mode and the like.
It is another object of the present invention to provide a method of using the above measurement method to provide a platform for fuel nozzle flow measurement.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a method of measurement of a multi-nozzle flow measurement system, comprising the steps of:
a. starting a computer control system, and mounting a nozzle to be measured on a double-oil-way injection device with a test nozzle to be ready;
b. opening a pump and a motor system to pump out fuel oil, entering a test nozzle of a double-oil-way injection device with the test nozzle through an unloading valve and a pressure gauge, and simultaneously starting the other path of fuel oil, wherein an electro-hydraulic proportional pressure valve is used for adjusting the oil pressure to ensure that the oil pressure reaching the test nozzle is kept consistent;
c. the fuel oil enters the oil receiving funnel and the pipeline after passing through the test nozzle and then returns to the mailbox through the two-position three-way electromagnetic directional valve;
d. when measurement is started, the two-position three-way electromagnetic directional valve is reversed, the oil receiving time is reached, then the oil is reversed, the fuel oil enters a graduated cylinder, the height difference of the fuel oil can be observed through the scales of the graduated cylinder, and then the accurate weight is weighed by a high-precision weighing sensor and a supporting plate;
e. when multiple measurements are needed or continuous measurements are needed, only the two-position three-way electromagnetic directional valve is required to be switched and the electromagnetic valve is required to be switched on and off to operate cooperatively.
Drawings
FIG. 1 is a schematic diagram of the test method of the present invention;
FIG. 2 is a schematic view of a dual oil circuit hydraulic oil supply system of the present invention;
FIG. 3 is a schematic view of a flow measurement system of the present invention.
In the figure: 1. a computer control system; 2. a dual oil path hydraulic oil supply system; 3. a flow measurement system; 4. an oil tank; 5. A thermometer; 6. a temperature controller system; 7. a pump and motor system; 8. an electro-hydraulic proportional pressure valve; 9. an unloading valve; 10. A pressure gauge; 11. a double-oil-way injection device with a test nozzle; 12. an oil receiving funnel and a pipeline; 13. a two-position three-way electromagnetic reversing valve; 14. a graduated measuring cylinder; 15. a high-precision weighing sensor and a supporting plate; 16. and switching on and off the electromagnetic valve.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following examples are illustrated in detail:
referring to fig. 1, a multi-nozzle flow measurement system and a measurement method thereof are characterized in that: the system comprises a computer control system 1, a double-oil-way hydraulic oil supply system 2 and a flow measurement system 3.
The computer control system 1 comprises computer hardware, a basic operating system and system control software.
Referring to fig. 2, the double-oil-path hydraulic oil supply system 2 comprises an oil tank 4, a thermometer 5, a temperature controller system 6, a pump and motor system 7, an electro-hydraulic proportional pressure valve 8, an unloading valve 9 and a pressure gauge 10.
Referring to fig. 3, the flow measuring system 3 includes a dual oil path injection device 11 with a test nozzle, an oil receiving funnel and a pipeline 12, a two-position three-way electromagnetic directional valve 13, a graduated measuring cylinder 14, a high-precision weighing sensor and a supporting plate 15, and a switching electromagnetic valve 16.
The computer control system 1 is connected with the double-oil-way hydraulic oil supply system 2 and the flow measurement system 3 through a data control line; the double-oil-way hydraulic oil supply system 2 is connected with the flow measurement system 3 through a fuel oil pipe.
It is another object of the present invention to provide a method of using the above measurement method to provide a platform for fuel nozzle flow measurement.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a method of measurement of a multi-nozzle flow measurement system, comprising the steps of:
a. starting the computer control system 1, and installing the nozzle to be measured on the double-oil-way injection device 11 with the test nozzle to be ready;
b. opening a pump and motor system 7 to pump out fuel oil, entering a test nozzle of a double-oil-path injection device 11 with the test nozzle through an unloading valve 9 and a pressure gauge 10, and simultaneously starting the other path of fuel oil, wherein an electro-hydraulic proportional pressure valve 8 is used for adjusting the oil pressure to ensure that the oil pressure reaching the test nozzle is kept consistent;
c. the fuel oil enters the oil receiving funnel and the pipeline 12 after passing through the test nozzle and then returns to the mailbox through the two-position three-way electromagnetic directional valve 13;
d. when the measurement is started, the two-position three-way electromagnetic directional valve 13 is reversed, the oil receiving time is reached, then the oil is reversed, the fuel oil enters the graduated cylinder 14 with scales, the height difference of the fuel oil can be observed through the scales of the graduated cylinder, and the accurate weight is weighed through the high-accuracy weighing sensor and the supporting plate 15;
e. when multiple measurements are needed or continuous measurements are needed, only the two-position three-way electromagnetic directional valve 13 needs to be switched and the electromagnetic valve 16 needs to be switched to operate cooperatively.
Principle of measurement
Assuming that the oil density is rho, and the mass change of the measuring cylinder in the timing time delta T is Mi-Mi-1Then, the instantaneous flow Q of the current nozzle can be obtained according to the formula (1)i。MiFor measuring the mass of the cylinder before timing, Mi-1The quality of the measuring cylinder after the timing time is over.
Measuring the flow rate by mass requires accurate liquid density values. Because the oil density changes along with the temperature and the pressure, the oil density needs to be compensated and calculated in real time. The pressure has little image to the oil density, and each measuring cylinder is communicated with the atmosphere, and almost no pressure change can be ignored. Considering that the flow measurement accuracy requirement is 2%, the temperature compensation of the density can be directly compensated by taking a quadratic formula, namely
ρ＝ρ0(1+αΔt+σΔT+σΔt2)
Wherein alpha and sigma are compensation coefficients; rho0For the oil at the temperature t in the standard state0Density of the particles. Δ t is the real time temperatureDegree-to-standard state temperature difference, i.e. Δ t-t0
In the formula, QiIs the instantaneous flow; miThe mass of the measuring cylinder after timing is finished; mi-1The mass of the measuring cylinder before timing; rho is density; Δ T is the timing interval; and k is a calibration coefficient.
Although preferred embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A multi-nozzle flow measurement system, characterized by: the system comprises a computer control system (1), a double-oil-way hydraulic oil supply system (2) and a flow measurement system (3).
2. The multi-nozzle flow measurement system of claim 1, wherein: the computer control system (1) comprises computer hardware, a basic operating system and system control software.
3. The multi-nozzle flow measurement system of claim 1, wherein: the double-oil-way hydraulic oil supply system (2) comprises an oil tank (4), a thermometer (5), a temperature controller system (6), a pump and motor system (7), an electro-hydraulic proportional pressure valve (8), an unloading valve (9) and a pressure gauge (10).
4. The multi-nozzle flow measurement system of claim 1, wherein: the flow measurement system (3) comprises a double-oil-way injection device (11) with a test nozzle, an oil receiving funnel, a pipeline (12), a two-position three-way electromagnetic directional valve (13), a graduated measuring cylinder (14), a high-precision weighing sensor, a supporting plate (15) and a switching electromagnetic valve (16).
5. The multi-nozzle flow measurement system of claims 1-4, wherein: the computer control system (1) is connected with the double-oil-way hydraulic oil supply system (2) and the flow measurement system (3) through data control lines; the double-oil-way hydraulic oil supply system (2) is connected with the flow measurement system (3) through a fuel oil pipe.
6. A method of measurement in a multi-nozzle flow measurement system, comprising the steps of:
a. starting a computer control system (1), and installing a nozzle to be measured on a double-oil-way injection device (11) with a test nozzle to be ready;
b. the pump and motor system (7) is opened to pump out fuel oil, the fuel oil enters a test nozzle of a double-oil-way injection device (11) with the test nozzle through an unloading valve (9) and a pressure gauge (10), the other path of fuel oil is started simultaneously, an electro-hydraulic proportional pressure valve (8) is used for adjusting the oil pressure, and the oil pressure reaching the test nozzle is ensured to be consistent at the moment;
c. the fuel oil enters the oil receiving funnel and the pipeline (12) after passing through the test nozzle and then returns to the mailbox through the two-position three-way electromagnetic directional valve (13);
d. when measurement is started, the two-position three-way electromagnetic directional valve (13) is reversed, the oil receiving time is reached, then the oil is reversed, the fuel oil enters a graduated cylinder (14), the height difference of the fuel oil can be observed through the scales of the graduated cylinder, and then the accurate weight is weighed by a high-accuracy weighing sensor and a supporting plate (15);
e. when multiple times of measurement or continuous measurement are needed, only the two-position three-way electromagnetic directional valve (13) needs to be reversed and the electromagnetic valve (16) needs to be switched on and off to operate cooperatively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910617660.7A CN110617170A (en) | 2019-07-10 | 2019-07-10 | Multi-nozzle flow measurement system and measurement method thereof |
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| CN201910617660.7A CN110617170A (en) | 2019-07-10 | 2019-07-10 | Multi-nozzle flow measurement system and measurement method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964474A (en) * | 2021-02-09 | 2021-06-15 | 中国航发哈尔滨东安发动机有限公司 | Aviation low-pressure fuel flow measuring system and method |
| CN113654806A (en) * | 2021-07-28 | 2021-11-16 | 浙江华擎航空发动机科技有限公司 | Method for detecting oil way distribution of turbine engine |
| CN115855945A (en) * | 2023-02-06 | 2023-03-28 | 北京成立科技有限公司 | Double-oil-way centrifugal nozzle atomized liquid film form detection equipment for combustion chamber |
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| CN206816427U (en) * | 2017-06-28 | 2017-12-29 | 广汉天空动力机械有限责任公司 | A kind of fuel nozzle Flow Measuring System |
| CN109357885A (en) * | 2018-11-02 | 2019-02-19 | 天津航宇卓然科技有限公司 | A kind of discharge coefficient Intelligent Calibration system of multichannel nozzle |
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| CN206816427U (en) * | 2017-06-28 | 2017-12-29 | 广汉天空动力机械有限责任公司 | A kind of fuel nozzle Flow Measuring System |
| CN109357885A (en) * | 2018-11-02 | 2019-02-19 | 天津航宇卓然科技有限公司 | A kind of discharge coefficient Intelligent Calibration system of multichannel nozzle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964474A (en) * | 2021-02-09 | 2021-06-15 | 中国航发哈尔滨东安发动机有限公司 | Aviation low-pressure fuel flow measuring system and method |
| CN112964474B (en) * | 2021-02-09 | 2023-10-13 | 中国航发哈尔滨东安发动机有限公司 | Low-pressure fuel flow measurement system and method for aviation |
| CN113654806A (en) * | 2021-07-28 | 2021-11-16 | 浙江华擎航空发动机科技有限公司 | Method for detecting oil way distribution of turbine engine |
| CN115855945A (en) * | 2023-02-06 | 2023-03-28 | 北京成立科技有限公司 | Double-oil-way centrifugal nozzle atomized liquid film form detection equipment for combustion chamber |
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