CN1908609B - Dry testing method for pressure limiting valve opening pressure - Google Patents
Dry testing method for pressure limiting valve opening pressure Download PDFInfo
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- CN1908609B CN1908609B CN200610017127XA CN200610017127A CN1908609B CN 1908609 B CN1908609 B CN 1908609B CN 200610017127X A CN200610017127X A CN 200610017127XA CN 200610017127 A CN200610017127 A CN 200610017127A CN 1908609 B CN1908609 B CN 1908609B
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Abstract
The related dry test method for startup pressure of limit-pressure valve comprises: with air or other gas as the media, auto sealing the valve cavity to fill low-pressure and hold for some seconds; boosting pressure to the cavity till the inner pressure over the supporting force of spring, starting up the valve. With simple method and low cost, this invention has very stable pre-fill pressure for accurate detection and high repeated precision.
Description
Technical field:
The present invention relates to a kind of dry testing method for pressure limiting valve opening pressure, particularly a kind of lubricating oil pump dry testing method for pressure limiting valve opening pressure is specially adapted to various forms steel ball class, and the lubricating oil pump pressure limiting valve of plunger class detects.
Background technology:
Traditional lubricating oil pump pressure limiting valve opening pressure test method uses oil as test(ing) medium, under rating test oil temperature, viscosity, speed conditions, utilize the required rating test pressure of variable valve controller oil pump product, lubricating oil pump oil-out pressure increases when closing variable valve, when greater than pressure limiting valve opening pressure, pressure limiting valve is opened, and obtains the opening pressure of pressure limiting valve this moment by pressure unit.Traditional is the pressure limiting valve opening pressure test of medium with oil, the experimentation cost height, beat is slow, test back product will carry out drop oil process, still have oil residual in the product behind the test drop oil, product is had certain pollution, and product cleanliness index is difficult for reaching, and makes troubles to storing, transport, reach user assembled use.
Known CN99100304.7 dry test method for testing leak tightness of heat radiator is the dry testing method that is different from a kind of performing leak test of the present invention.
Known JP2001165812 safety valve test method and safety valve test device (SAFETYVALVE TEST METHOD AND SAFETY VALVE TEST APPARATUS) are to be different from a kind of test method of the present invention.
Summary of the invention:
The object of the present invention is to provide a kind of dry testing method for pressure limiting valve opening pressure, pressure limiting valve dry type method for testing performance is as medium with air, automatic sealed pressure-limiting valve chamber, after charging into low-pressure air in advance, stablized several seconds pressure limiting valve cavity, pass through the supercharging in pressure limiting valve cavity of air pressure supercharging device again, when the pressure limiting valve cavity internal gas pressure that constantly increases greater than pressure valve spring during to the supporting power of pressure limiting valve body, pressure limiting valve is opened.Pressure-air loses heart from pressure limiting valve, and the pressure limiting valve cavity internal pressure no longer rises, and the maximal value that gather out in this pressure uphill process by pressure unit this moment is pressure limiting valve opening pressure.
Technical scheme of the present invention is achieved in that dry testing method for pressure limiting valve opening pressure, it is characterized in that: its test unit comprises source of the gas; And pre-loading line, pressure piping and examined test products check valve body lumen road, pre-loading line is by pressure regulator valve and retaining valve series connection; Pressure piping is by solenoid directional control valve and booster body series connection, article two, pipeline input end pressure regulator valve and solenoid directional control valve and source of the gas and connect, output terminal retaining valve and booster body and examined test products retaining valve cavity also connect, and the pressure transducer input end is connected on the cavity of test retaining valve; Its test(ing) medium is air or other gaseous state gas, concrete steps are as follows: inflate at first in advance, future to the gas of source of the gas is set up compressed air pressure in the 0.01-1.5MPa scope by pressure regulator valve, pre-loading line is to inflation in advance in the pressure limiting valve cavity, make pressure limiting valve reach sealing, reach stable gas pressure; Secondly future to the quantitative pressure gas of source of the gas passes through the supercharging in pressure limiting valve cavity of air pressure booster body again by pressure piping; Pressure-air did not reflux by preliminary filling air pipe passage and loses heart when the retaining valve on the pre-loading line had guaranteed the supercharging of pre-inflation back; Carry out supercharging by the solenoid directional control valve conversion to the booster body air feed then, along with pressure limiting valve cavity air pressure constantly rises, gases at high pressure act on pressure limiting valve plunger or the steel ball, when high-pressure gas pressure during greater than the pressure valve spring pretightning force pressure limiting valve plunger or steel ball open, pressure unit detects the mxm. of air pressure this moment simultaneously; Because pressure limiting valve is opened, after high pressure chest gas causes air pressure suddenly to descend from the leakage of pressure limiting valve port, when pressure valve spring power acts on acting force on the pressure limiting valve plunger greater than high pressure chest gas again, pressure limiting valve cuts out again, booster body to pressure limiting valve cavity does not have gas to continue to supply with again thereupon, gaseous tension no longer rises in the pressure limiting valve cavity, so far detects to finish.
Good effect of the present invention is because this test method preliminary filling pressure is highly stable, and booster cavity gas is quantitative, thus not only easy to detect accurately, and repeatable accuracy is also very high.Test method is simple, and cost is extremely low, and the test period is very short, does not influence product cleanliness index, good operational environment, and transportation is convenient.
Description of drawings:
The dry testing method for pressure limiting valve opening pressure apparatus structure synoptic diagram of Fig. 1 manual calibration testing table
The dry testing method for pressure limiting valve opening pressure apparatus structure synoptic diagram of the automatic calibration test platform of Fig. 2
Embodiment:
The present invention will be further described below in conjunction with accompanying drawing: dry testing method for pressure limiting valve opening pressure as depicted in figs. 1 and 2, and it is characterized in that: its test unit comprises source of the gas 1; And pre-loading line, pressure piping and examined test products check valve body lumen road, pre-loading line is by pressure regulator valve 2 and retaining valve 5 series connections; Pressure piping is by solenoid directional control valve 3 and booster body 4 series connections, article two, pipeline input end pressure regulator valve 2 and solenoid directional control valve 3 is with source of the gas 1 and connect, output terminal retaining valve 5 and booster body 4 is with examined test products retaining valve cavity and connect, and the pressure transducer input end is connected on the cavity of test retaining valve; Pressure limiting valve opening pressure dry type performance methodology is to utilize the acting force of pressure valve spring to act on equilibrium principle mutually with the gaseous tension that the lubricating oil pump high pressure chest charges into, its test with air or other gaseous state gas as medium.Come compressed air pressure to be set up in the certain limit that the pressure limiting valve opening pressure size is not opened as yet by pressure regulator valve 2 to source of the gas 1 gas, pre-loading line to inflation in advance in the pressure limiting valve cavity, makes pressure limiting valve reach relative sealing with low pressure, and it is relatively stable to reach air pressure.Come to pass through air pressure booster body 4 supercharging in pressure limiting valve cavity again by pressure piping to source of the gas 1 quantitative pressure gas.Pressure-air did not reflux by preliminary filling air pipe passage and loses heart when retaining valve 5 guaranteed the supercharging of pre-inflation back on the pre-loading line.Carry out supercharging by the solenoid directional control valve conversion to booster body 4 air feed then, along with pressure limiting valve cavity air pressure constantly rises, gases at high pressure act on pressure limiting valve plunger or the steel ball, when high-pressure gas pressure during greater than the pressure valve spring pretightning force pressure limiting valve plunger or steel ball open, pressure unit 7 detects the mxm. of air pressure this moment simultaneously.Because pressure limiting valve is opened, after high pressure chest gas causes air pressure suddenly to descend from the leakage of pressure limiting valve port, when pressure valve spring power acts on acting force on the pressure limiting valve plunger greater than tripping chamber gas again, pressure limiting valve cuts out again, booster body to pressure limiting valve cavity does not have gas to continue to supply with again thereupon, gaseous tension no longer rises in the pressure limiting valve cavity, so far detects to finish.
This test method needs the master body of dry testing or volumetric standard 9 to come the rating test platform, because pressure limiting valve opening pressure has upper and lower bound, therefore need carry out two kinds of calibration exemplars of upper and lower bound or volumetric standard.
As shown in Figure 1, the pressure limiting valve opening pressure dry testing of manual calibration testing table before the test, is installed on the position of test station pressure limiting valve 6 with master body or volumetric standard 9, rating test platform pressure limiting valve opening pressure upper and lower bound.After the demarcation, taking off master body or volumetric standard 9 from test station, installation test workpiece pressure limiting valve 6 begins test and detects.
As shown in Figure 2, the pressure limiting valve opening pressure dry testing of calibration test platform before the test, is closed stop valve 8 (a) automatically, opens stop valve 8 (b) and demarcates pressure limiting valve opening pressure dry testing platform.Open stop valve 8 (a), close stop valve 8 (b) beginning experimental test.
Claims (2)
1. dry testing method for pressure limiting valve opening pressure, it is characterized in that: test unit comprises source of the gas (1) and pre-loading line, pressure piping and examined test products pressure limiting valve cavity pipeline, and pre-loading line is by pressure regulator valve (2) and retaining valve (5) series connection; Pressure piping is by solenoid directional control valve (3) and booster body (4) series connection, pre-loading line pressure regulator valve (2) is connected with source of the gas (1) with pressure piping solenoid directional control valve (3) is in parallel, pre-loading line retaining valve (5) is connected with the in parallel and examined test products pressure limiting valve cavity of pressure piping booster body (4), and the pressure transducer input end is connected on the cavity of test products pressure limiting valve; Its test(ing) medium is a gaseous state gas, concrete steps are as follows: inflate at first in advance, will by pressure regulator valve gaseous tension be set up in the 0.01-1.5Mpa scope from the gas of source of the gas, pre-loading line is to inflation in advance in the pressure limiting valve cavity, make pressure limiting valve reach sealing, reach stable gas pressure; Secondly will pass through booster body supercharging in pressure limiting valve cavity again by pressure piping from the quantitative gas of source of the gas; Gas did not reflux by preliminary filling air pipe passage and loses heart when the retaining valve on the pre-loading line had guaranteed the supercharging of pre-inflation back; Carry out supercharging by the solenoid directional control valve conversion to the booster body air feed then, along with pressure limiting valve cavity air pressure constantly rises, gas acts on pressure limiting valve plunger or the steel ball, when gaseous tension during greater than the pressure valve spring pretightning force pressure limiting valve plunger or steel ball open, pressure transducer detects the mxm. of air pressure this moment simultaneously; Because pressure limiting valve is opened, after pressure limiting valve cavity gas causes air pressure suddenly to descend from the leakage of pressure limiting valve port, when the pressure valve spring pretightning force acts on acting force on pressure limiting valve plunger or the steel ball greater than pressure limiting valve cavity gas again, pressure limiting valve cuts out, booster body to pressure limiting valve cavity does not have gas to continue to supply with again thereupon, gaseous tension no longer rises in the pressure limiting valve cavity, so far detects to finish.
2. dry testing method for pressure limiting valve opening pressure according to claim 1 is characterized in that described pre-inflation back stable gas pressure 2-10 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610017127XA CN1908609B (en) | 2006-08-23 | 2006-08-23 | Dry testing method for pressure limiting valve opening pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610017127XA CN1908609B (en) | 2006-08-23 | 2006-08-23 | Dry testing method for pressure limiting valve opening pressure |
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| CN1908609A CN1908609A (en) | 2007-02-07 |
| CN1908609B true CN1908609B (en) | 2011-09-28 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103134667B (en) * | 2011-11-24 | 2015-07-22 | 宝山钢铁股份有限公司 | Detecting device and detecting method of pilot valve for valve positioner |
| CN102720667B (en) * | 2012-06-28 | 2015-10-14 | 湖南机油泵股份有限公司 | A kind of test method of engine oil pump pressure-limiting valve cracking pressure and device |
| CN102928175B (en) * | 2012-10-17 | 2015-10-21 | 中国石油化工股份有限公司 | The test macro of emptying petroleum vapor recovery effect and method |
| CN104697769A (en) * | 2014-12-29 | 2015-06-10 | 宁波圣龙汽车动力系统股份有限公司 | Opening pressure gas measuring device and method for oil pump pressure limiting valve |
| CN105021395B (en) * | 2015-08-18 | 2017-10-10 | 蚌埠国威滤清器有限公司 | Oil filter bypasses valve opening pressure gas-detecting device |
| CN105334035A (en) * | 2015-11-02 | 2016-02-17 | 绵阳富临精工机械股份有限公司 | One-way valve performance test system and test method |
| CN105738092B (en) * | 2016-02-04 | 2018-03-13 | 潍柴动力股份有限公司 | A kind of pressure limiting valve fatigue experimental device and method |
| CN106226045B (en) * | 2016-07-12 | 2018-10-26 | 富奥汽车零部件股份有限公司 | A kind of dry testing method for pressure limiting valve opening pressure and device |
| CN106122582B (en) * | 2016-08-29 | 2018-06-19 | 南通市通润汽车零部件有限公司 | A kind of built-in valve pressure regulator |
| CN112197948A (en) * | 2020-10-10 | 2021-01-08 | 北京汽车集团越野车有限公司 | Pressure detection device of normally closed breather plug |
| CN114136608A (en) * | 2021-12-17 | 2022-03-04 | 重庆百吉四兴压铸有限公司 | Pressure test system |
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Address after: Dongfeng Street 130011 Jilin province Changchun Automobile City Economic and Technological Development Zone No. 777 Patentee after: Fawer Automotive Parts Limited Company Address before: 130033 No. 245, Shenzhen street, Changchun Economic Development Zone, Jilin, China Patentee before: Fawer Automotive Parts Limited Company |