CN106525395B - High-power natural gas injection valve test bench and test method - Google Patents
High-power natural gas injection valve test bench and test method Download PDFInfo
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- CN106525395B CN106525395B CN201610892354.0A CN201610892354A CN106525395B CN 106525395 B CN106525395 B CN 106525395B CN 201610892354 A CN201610892354 A CN 201610892354A CN 106525395 B CN106525395 B CN 106525395B
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Abstract
The invention discloses a high-power natural gas injection valve test bench which comprises a pressure accumulator, a first switch valve, a first fine filter, an overflow valve, a first pressure gauge, a pressure sensor, a displacement sensor and a mass flowmeter, wherein the pressure accumulator is connected with the first switch valve; one end of the pressure accumulator is communicated with a gas source, and the other end of the pressure accumulator is sequentially communicated with the first switch valve, the first fine filter, the overflow valve, the first pressure gauge and the pressure sensor; one end of the injection valve to be tested is communicated with the pressure sensor, and the other end of the injection valve to be tested is communicated with the mass flowmeter; the displacement sensor is used for measuring the valve core lift of the injection valve to be measured. The test bed changes the prior injection valve test method, has no limit on the range of the injection valve, has the indexes of testing the single injection quantity, consistency, stability, response characteristic and the like of the high-power gas injection valve, and can provide good guarantee for research and development and product application.
Description
Technical Field
The invention relates to the field of high-power natural gas engines, in particular to a high-power natural gas injection valve test bench and a test method.
Background
With the development of recent decades, the technology of natural gas engines is becoming mature and the application field is wide, however, compared with fuel oil engines, the technology of natural gas engines is far from the aspect of testing. In the test of the injection valve, due to the reasons that the gas has compressibility, the pressure fluctuation is large, the injection frequency of the injection valve is high and the like, the measurement of the single injection quantity and the injection rule is very difficult, so that the indexes of consistency, stability, response and the like of the injection valve cannot be evaluated. Those skilled in the art have not found a test apparatus and test method for a single injection meter similar to that found in a fuel engine system.
The product-grade natural gas injection valve test bench is temporarily available in China, the injection valve test bench can only be subjected to non-calibration control, and the existing test bench can only test stable flow measurement and cannot obtain transient indexes.
Although the AirMexus device of Loccioni can measure the single injection rule and the single injection quantity, the measuring range is only 0.8-100 mg/cycle, and the actual injection quantity of the high-power injection valve can reach 1-2 g/cycle.
Those skilled in the art have therefore endeavored to develop a high power natural gas injection valve test rig.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to solve the technical problem of developing a high-power natural gas injection valve test bench, and the injection rule and the single injection quantity of the high-power natural gas injection valve are tested through the test bench, so that the indexes of consistency, stability, response and the like of the injection valve are better evaluated, and a good guarantee is provided for the research and development and application of the high-power natural gas injection valve.
In order to achieve the purpose, the invention provides a high-power natural gas injection valve test bench, and specifically provides the following technical scheme:
a high-power natural gas injection valve test bench comprises a pressure accumulator, a first switch valve, a first fine filter, an overflow valve, a first pressure gauge, a pressure sensor, a displacement sensor and a mass flow meter; one end of the pressure accumulator is communicated with a gas source, and the other end of the pressure accumulator is sequentially communicated with the first switch valve, the first fine filter, the overflow valve, the first pressure gauge and the pressure sensor; one end of the injection valve to be tested is communicated with the pressure sensor, and the other end of the injection valve to be tested is communicated with the mass flowmeter; the displacement sensor is used for measuring the valve core lift of the injection valve to be measured.
Preferably, the first switching valve has an inner diameter of 25 mm.
Preferably, the first fine filter has a filtration precision of 5 μm or less.
Further, the first fine filter had a filtration accuracy of 3 μm.
Preferably, the pressure sensor is an amperometric pressure sensor.
Preferably, the pressure sensor is in communication with the injection valve to be tested via a hose.
Preferably, the other end of the mass flow meter is connected to a container containing liquid.
Preferably, the test bed further comprises a second fine filter, a second pressure gauge and a second switch valve which are sequentially communicated between the gas source and the pressure accumulator.
Preferably, the first fine filter has a filtration precision of 5 μm or less.
Further, the first fine filter had a filtration accuracy of 3 μm.
The test bed provided by the invention changes the conventional injection valve test method, has no limitation on the range of the injection valve, has the capability of testing all performance indexes required by the high-power gas injection valve, including indexes such as single injection quantity, consistency, stability and response characteristic of the injection valve, and can provide good guarantee for research and development and product application.
The test bed and the technical effects thereof will be further described in the following with reference to the accompanying drawings so as to fully understand the objects, features and effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of a test stand in accordance with a preferred embodiment of the present invention
Detailed Description
Due to the compressibility of the gas and the high injection frequency of the injection valve, the measurement of the single injection quantity is very difficult, and the injection rule cannot be measured at all. The invention mainly decomposes the single injection quantity required to be measured by the injection valve into the flow capacity under the maximum opening which can be measured by a common mass flow meter and the product of the valve core flow lift which can be measured by a displacement sensor, and the stability of the pressure of the gas which flows through the injection valve is required to be high.
Fig. 1 shows a schematic diagram of a test bench according to a preferred embodiment of the present invention, which includes a fine filter 1, a pressure gauge 21, a switch valve 31, a pressure accumulator 4, a switch valve 32, a fine filter 10, an overflow valve 11, a pressure gauge 22, a pressure sensor 6, a hose 12, a displacement sensor 7, a mass flow meter 13, and a container 8.
Wherein, the fine filter 1, the pressure gauge 21, the switch valve 31, the pressure accumulator 4, the switch valve 32, the fine filter 10, the overflow valve 11, the pressure gauge 22 and the pressure sensor 6 are communicated in sequence. The fine filter 1 is used for fine filtering of the gas from the gas source, and the filtering precision is preferably 5 μm or less, and in the present embodiment, 3 μm precision is adopted. The pressure gauge 21 is mainly used for directly checking the air pressure of an air source on one side of the test bed. The on-off valve 31 facilitates closing of the air intake of the entire test stand. The pressure accumulator 4 plays the roles of absorbing impact and stabilizing pressure output on the air inlet source, prevents the influence of sudden change of air inlet on the whole air path, and ensures the stability of air pressure at the inlet of the valve when the valve is used for a steady-state flow test. The on-off valve 32 is used to control the inlet air for the steady state flow test, preferably with an internal diameter of 25mm (DN 25). The fine filter 10 performs fine filtration of the air in the air passage again to prevent air pollution caused by the primary components such as the pressure accumulator, and the like, and the filtration precision is preferably 5 μm or less, and in the embodiment, the precision of 3 μm is adopted. The overflow valve 11 is used for adjusting the pressure of the subsequent gas path, namely adjusting the gas pressure passing through the injection valve to be tested. The pressure gauge 22 can visually see the pressure of the injection valve to be measured, so that an operator can adjust the pressure at the inlet of the injection valve to an actual required working condition through the overflow valve 11 in time. The pressure sensor 6 is preferably an amperometric pressure sensor, which can accurately read the pressure value of the gas path for transmission to a data processing terminal for evaluating the pressure stability of the gas flowing through the injection valve. Pressure sensor 6 passes through hose 12 and is connected with the injection valve that awaits measuring that is arranged in the test cavity, and the other end of injection valve that awaits measuring is connected with mass flow meter 13 for gather the steady state flow under the injection valve case condition of opening completely, through the gas flow of the injection valve that awaits measuring promptly, the gas circuit still is connected to container 8 at last, contains liquid in the container 8, is used for the visual display gas circuit to have gas outgoing, and container 8 can be test tube, beaker etc. experiment container commonly used. A displacement sensor 7, which may be a laser displacement sensor, for example, is also provided in the test chamber for detecting the lift of the valve element of the injection valve. The overflow valve 11, the pressure sensor 6 and the displacement sensor 7 are further connected with a data processing terminal and used for calculating and evaluating indexes such as single injection quantity, stability, consistency and response characteristics of the injection valve.
In other embodiments, the auxiliary components of the fine filter 1, the pressure gauge 21, the on-off valve 31, the container 8, etc. in the preferred embodiment of the present invention may be eliminated, and the single injection amount of the injection valve may still be tested normally. The internal diameter of the switching valve can have other values, but is typically about 5 times the lift of the valve element of the injection valve.
The specific test method of the high-power natural gas injection valve test bench comprises the following steps:
first, the mass flowmeter 13 measures the steady flow rate of the injection valve body at the maximum opening, and the rated flow rate Q of the injection valve body at the maximum displacement of the valve element lift x can be obtained.
Then, the displacement sensor 7 can conveniently measure the valve core displacement motion curve y (t) and the area S surrounded by the curve under each injection cycle of the valve core of the injection valve under the condition of a given pulse width.
The product of the area S enclosed by the spool displacement motion curve and the rated flow rate Q at the maximum opening is the single injection amount.
And recording a current curve I (t) from the beginning measurement to the end measurement of the test bench, for example, measuring by using a current clamp, and comparing the valve core displacement motion curve y (t) with the current curve I (t) to obtain a response characteristic index, wherein the response characteristic index comprises an on delay and an off delay.
The stability of the valve can be evaluated by analyzing the stability of 100 consecutive injections on the basis of the obtained single injection amount. The deviation of the consistency of the different valves can be obtained by measurements of the different injection valves.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (5)
1. A high-power natural gas injection valve test bench is characterized by comprising a first switch valve, a displacement sensor, a mass flow meter, a current clamp and a data terminal; one end of the first switch valve is communicated with an air source with stable pressure and specified pressure after fine filtration, the other end of the first switch valve is communicated with the injection valve to be tested, and the inner diameter of the first switch valve is 25 micrometers; the other end of the injection valve to be tested is communicated with the mass flowmeter; the displacement sensor is connected with the injection valve to be detected; the displacement sensor and the current clamp are connected with the data terminal; the first switching valve is used for controlling air inlet of a steady-state flow test, and the inner diameter of the valve is selected according to an injection valve to be tested; the displacement sensor is used for acquiring the lift of the valve core of the injection valve to be detected to obtain a valve core displacement motion curve; the mass flowmeter is used for acquiring rated flow under the maximum opening of the valve core of the injection valve to be measured; the current clamp is used for measuring a current curve of the valve core coil of the injection valve to be tested during electrification; the data terminal is used for calculating and evaluating the single injection quantity, stability, consistency and response characteristic indexes of the injection valve to be tested; the single injection amount is the product of the rated flow under the maximum opening degree and the area surrounded by the valve core displacement motion curve.
2. The high power natural gas injection valve test bench of claim 1, wherein the displacement sensor measures a spool displacement motion curve of the injection valve under test for each injection cycle at a given pulse width, the displacement curve independent variable is time and the dependent variable is displacement.
3. The high power natural gas injection valve test bench of claim 1 wherein the mass flow meter can directly measure the mass flow of gas through the injection valve under test, avoiding measurement errors caused by changes in gas density due to changes in gas temperature and pressure in the volumetric flow meter.
4. The high power natural gas injection valve test bench of claim 1, wherein the current curve measured by the current clamp is the current curve from the beginning to the end of the measurement, the independent variable of the current curve is time, the dependent variable is current, and the on-delay and the off-delay of the spool coil of the solenoid valve can be obtained.
5. A test method for the high power natural gas injection valve test bench of claim 1, wherein the performance test method for the high power natural gas injection valve is as follows:
A. measuring the stable mass flow of the valve body of the injection valve to be measured under the maximum opening through the mass flowmeter, and obtaining the rated mass flow of the valve body of the injection valve to be measured under the condition that the valve element lift of the valve is the maximum displacement;
B. measuring a valve core displacement motion curve and an area surrounded by the curve of the valve core under each injection cycle under the condition of a given pulse width of the valve core of the injection valve to be measured through the displacement sensor;
C. obtaining the single injection quantity of the injection valve to be tested by multiplying the area surrounded by the valve core displacement motion curve and the rated flow under the maximum opening;
D. by comparing the valve core displacement curve and the current curve of the injection valve to be tested, the response characteristic indexes of the injection valve to be tested, including opening delay and closing delay, can be obtained;
E. analyzing the stability of 100 times of continuous injection on the basis of obtaining the single injection amount, namely evaluating the stability of the injection valve to be tested;
F. the consistency deviations of different valves can be obtained by measurements of different injection valves of the same type.
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| CN109186981A (en) * | 2018-09-18 | 2019-01-11 | 上海工程技术大学 | A kind of high-power nozzle group valve discharge characteristic is test bed |
| CN109000918B (en) * | 2018-09-21 | 2024-06-04 | 中国船舶集团有限公司第七一一研究所 | Testing device and testing method for electric control fuel gas injection valve of gas engine |
| CN110068458A (en) * | 2019-04-16 | 2019-07-30 | 安徽捷迅光电技术有限公司 | A kind of snifting valve flow detection frock |
| CN110220696A (en) * | 2019-07-15 | 2019-09-10 | 中船动力研究院有限公司 | A kind of gas valve the amount of injection measuring test-bed |
| CN116335818B (en) * | 2023-01-02 | 2024-05-14 | 重庆长安汽车股份有限公司 | Hydrogen engine nozzle flow measuring device and measuring method |
| CN115900861A (en) * | 2023-03-13 | 2023-04-04 | 西安成立航空制造有限公司 | Aero-engine nozzle flow testing device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364661A (en) * | 2013-07-09 | 2013-10-23 | 镇江恒驰科技有限公司 | Device for testing performance of natural gas injection electromagnetic valve and testing method of device |
| CN205120319U (en) * | 2015-11-25 | 2016-03-30 | 江南工业集团有限公司 | Multi -functional valve test system of automobile -used LNG gas cylinder |
| CN206479315U (en) * | 2016-10-12 | 2017-09-08 | 中国船舶重工集团公司第七一一研究所 | A kind of high-power gas injector is test bed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100868554B1 (en) * | 2007-05-04 | 2008-11-13 | (주) 엔케이텍 | Apparatus for testing fuel injection for CNG vehicles |
-
2016
- 2016-10-12 CN CN201610892354.0A patent/CN106525395B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364661A (en) * | 2013-07-09 | 2013-10-23 | 镇江恒驰科技有限公司 | Device for testing performance of natural gas injection electromagnetic valve and testing method of device |
| CN205120319U (en) * | 2015-11-25 | 2016-03-30 | 江南工业集团有限公司 | Multi -functional valve test system of automobile -used LNG gas cylinder |
| CN206479315U (en) * | 2016-10-12 | 2017-09-08 | 中国船舶重工集团公司第七一一研究所 | A kind of high-power gas injector is test bed |
Non-Patent Citations (2)
| Title |
|---|
| 增压单燃料CNG发动机电控多点顺序喷射***的研究;岑艳 等;《柴油机》;20021231(第6期);第17-21页 * |
| 电控顺序喷射CNG发动机喷射定时的试验研究;郭林福 等;《小型内燃机与摩托车》;20060630;第35卷(第3期);第1-4页 * |
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Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee after: The 711 Research Institute of China Shipbuilding Corp. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: Shanghai Marine Diesel Engine Research Institute |