CN102518581A - Gas test method for testing open pressure of testing machine oil pump pressure-limiting valve - Google Patents
Gas test method for testing open pressure of testing machine oil pump pressure-limiting valve Download PDFInfo
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- CN102518581A CN102518581A CN2011103870934A CN201110387093A CN102518581A CN 102518581 A CN102518581 A CN 102518581A CN 2011103870934 A CN2011103870934 A CN 2011103870934A CN 201110387093 A CN201110387093 A CN 201110387093A CN 102518581 A CN102518581 A CN 102518581A
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Abstract
The technical scheme of the invention is to provide a gas test method for testing open pressure of a testing machine oil pump pressure-limiting valve with the following structure. A gas source, a gas storage tank and an oil pump are connected to form a test system, wherein the gas source and the gas storage tank are connected, and a pipeline between the two is provided with a first switch; and a second switch, a flow meter and a pressure meter are connected on a pipeline between the gas storage tank and the oil pump in sequence.
Description
Technical field
The present invention relates to a kind of gas survey method of test machine oil pump pressure limiting valve opening pressure.
Background technique
Oil pump must be carried out the test of pressure limiting valve opening pressure before dispatching from the factory.Requirement in the design drawing is to use oily survey method to test, but oil is surveyed seriously polluted to environment, and also needs after the test to clean; Cumbersome, cause cost of production to improve, the manufacture cycle is long; Gas is surveyed then and is more cleaned, do not need to clean, and therefore, using gas survey method to replace oily survey method is present oil pump pressure-limit valve trend of analytical methods; But in actual test process, the technician finds that the conclusion of using gas survey method commonly used at present to draw is inconsistent with the conclusion of using oily survey method to draw; Therefore, when using gas survey method commonly used at present that the oil pump pressure-limit valve is tested, accurately whether the deteminate machine oil pump is qualified.
Summary of the invention
For solving above-mentioned technical problem, the present invention provides the gas survey method of a kind of test result test machine oil pump pressure limiting valve opening pressure that accurately, accurately the deteminate machine oil pump is whether qualified.
Technological scheme of the present invention is; A kind of gas survey method with test machine oil pump pressure limiting valve opening pressure of following structure is provided; Source of the gas, gas holder, oil pump are connected to form test system; Wherein, source of the gas is connected with gas holder and the pipeline of between is provided with first switch, on the pipeline between gas holder and the oil pump, is connected with second switch, flowmeter and pressure gauge in turn;
Then, the pump chamber with oil pump seals;
Open first switch between source of the gas and the gas holder; Close the second switch between gas holder and the flowmeter, inflate in gas holder through source of the gas, the air pressure in gas holder surpasses the cracking pressure of pressure-limit valve; Close first switch between the source of the gas gas holder then, stop air feed in gas holder;
Open the second switch between gas holder and the flowmeter, the gas in the gas holder pours rapidly in the pump chamber of oil pump and since this moment the pressure in the pump chamber greater than the cracking pressure of pressure-limit valve; Pressure-limit valve is opened fully; Pressure release, along with the decline of pressure, pressure-limit valve cuts out thereupon gradually;
Along with the decline of accumulator tank internal pressure, flowmeter between gas holder and the oil pump and pressure gauge feed back to metrical infromation separately control system and on the display device of control system, describe out pressure/flow curve according to the flow information and the pressure information that receive;
Ultimate pressure/flow curve A, the B of the pressure/flow curve on the control system display device and two limit appearance pump demarcation are compared; When the pressure/flow curve that shows on the display device when above-mentioned two limit appearance pumps are demarcated between two ultimate pressure/flow curve A, the B, can the deteminate machine oil pump qualified.
After adopting said structure, the present invention has the following advantages: easy and simple to handle, survey conclusion that the result draws by gas and reach a conclusion and be consistent with survey the result according to oil, therefore, and reliable test result, whether the deteminate machine oil pump is qualified accurately.
Description of drawings:
Fig. 1 is the process flow diagram of the gas survey method of test machine oil pump pressure limiting valve opening pressure of the present invention;
Fig. 2 is the map of the gas survey method test result of test machine oil pump pressure limiting valve opening pressure of the present invention;
Embodiment:
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
Like Fig. 1, shown in Figure 2, the A among Fig. 2, B are respectively two limit curves that two limit appearance pumps are demarcated.
The gas survey method of test machine oil pump pressure limiting valve opening pressure of the present invention; Source of the gas 1, gas holder 2, oil pump 3 are connected to form test system; Wherein, Source of the gas 1 is connected with gas holder 2 and the pipeline of between is provided with first switch 4, on the pipeline between gas holder 2 and the oil pump 3, is connected with second switch 5, flowmeter 7 and pressure gauge 8 in turn;
Then, the pump chamber with oil pump 3 seals;
Open first switch 4 between source of the gas 1 and the gas holder 2; Close the second switch 5 between gas holder 2 and the flowmeter; Inflate in gas holder 2 through source of the gas 1; Air pressure in gas holder 2 surpasses the cracking pressure of pressure-limit valve 6, closes first switch 4 between source of the gas 1 gas holder 2 then, stops air feed in gas holder 2;
Open the second switch 5 between gas holder 2 and the flowmeter 7, the gas in the gas holder 2 pours rapidly in the pump chamber of oil pump 3 and since this moment the pressure in the pump chamber greater than the cracking pressure of pressure-limit valve; Pressure-limit valve is opened fully; Pressure release, along with the decline of pressure, pressure-limit valve cuts out thereupon gradually;
Along with the decline of accumulator tank 2 internal pressures, the flowmeter 7 between gas holder 2 and the oil pump 3 feeds back to metrical infromation separately control system and on the display device of control system, describes out pressure/flow curve according to the flow information and the pressure information that receive with pressure gauge 8;
Ultimate pressure/flow curve A, the B of the pressure/flow curve on the control system display device and two limit appearance pump demarcation are compared; When the pressure/flow curve that shows on the display device when above-mentioned two limit appearance pumps are demarcated between two ultimate pressure/flow curve A, the B, can the deteminate machine oil pump qualified.
Claims (1)
1. the gas survey method of a test machine oil pump pressure limiting valve opening pressure; It is characterized in that: source of the gas (1), gas holder (2), oil pump (3) are connected to form test system successively; Wherein, Source of the gas (1) is connected with gas holder (2) and the pipeline of between is provided with first switch (4), on the pipeline between gas holder (2) and the oil pump (3), is connected with second switch (5), flowmeter (7) and pressure gauge (8) in turn;
Then, the pump chamber with oil pump (3) seals;
Open first switch (4) between source of the gas (1) and the gas holder (2); Close the second switch (5) between gas holder (2) and the flowmeter (7); Inflate in gas holder (2) through source of the gas (1); Air pressure in gas holder (2) surpasses the cracking pressure of pressure-limit valve (6), closes first switch (4) between source of the gas (1) gas holder (2) then, stops air feed in gas holder (2);
Open the second switch (5) between gas holder (2) and the flowmeter (7); Gas in the gas holder (2) pours rapidly in the pump chamber of oil pump (3); Because the pressure in the pump chamber is greater than the cracking pressure of pressure-limit valve at this moment, pressure-limit valve is opened fully, pressure release; Along with the decline of pressure, pressure-limit valve cuts out thereupon gradually;
In the process that accumulator tank (2) internal pressure descends; Flowmeter (7) between gas holder (2) and the oil pump (3) and pressure gauge (8) feed back to control system with metrical infromation separately, and control system is described out corresponding pressure/flow curve according to the flow information and the pressure information that receive on display device;
Ultimate pressure/flow curve A, the B of the pressure/flow curve on the control system display device and two limit appearance pump demarcation are compared; When the pressure/flow curve that shows on the display device when above-mentioned two limit appearance pumps are demarcated between two ultimate pressure/flow curve A, the B, can the deteminate machine oil pump qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110387093.4A CN102518581B (en) | 2011-11-29 | 2011-11-29 | Gas test method for testing open pressure of testing machine oil pump pressure-limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110387093.4A CN102518581B (en) | 2011-11-29 | 2011-11-29 | Gas test method for testing open pressure of testing machine oil pump pressure-limiting valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102518581A true CN102518581A (en) | 2012-06-27 |
| CN102518581B CN102518581B (en) | 2015-04-22 |
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| CN201110387093.4A Active CN102518581B (en) | 2011-11-29 | 2011-11-29 | Gas test method for testing open pressure of testing machine oil pump pressure-limiting valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528811A (en) * | 2013-10-29 | 2014-01-22 | 宁波圣龙汽车动力系统股份有限公司 | Air testing method for opening pressure of automatic transmission pressure regulating valve |
| 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 |
| 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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| US6882960B2 (en) * | 2003-02-21 | 2005-04-19 | J. Davis Miller | System and method for power pump performance monitoring and analysis |
| US7363807B2 (en) * | 2004-04-28 | 2008-04-29 | Sid Harvey Industries, Inc. | Pump testing apparatus and method |
| CN201281663Y (en) * | 2008-09-09 | 2009-07-29 | 宁波圣龙汽车零部件有限公司 | Test stand for pressure-limiting valve opening pressure |
| CN201610839U (en) * | 2009-12-30 | 2010-10-20 | 上海高压油泵厂有限公司 | Double-speed oil pump test-bed hydraulic device |
| DE102009045369A1 (en) * | 2009-10-06 | 2011-04-07 | Robert Bosch Gmbh | Method for examining operability of high-pressure pump of common-rail-diesel internal-combustion engine of motor vehicle, involves examining operability of high-pressure pump based on measured fuel pressure in high pressure storage unit |
| CN201955208U (en) * | 2010-12-24 | 2011-08-31 | 宁波圣龙汽车动力系统股份有限公司 | Oil pump pressure-limiting valve starting pressure testboard |
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2011
- 2011-11-29 CN CN201110387093.4A patent/CN102518581B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6882960B2 (en) * | 2003-02-21 | 2005-04-19 | J. Davis Miller | System and method for power pump performance monitoring and analysis |
| US7363807B2 (en) * | 2004-04-28 | 2008-04-29 | Sid Harvey Industries, Inc. | Pump testing apparatus and method |
| CN201281663Y (en) * | 2008-09-09 | 2009-07-29 | 宁波圣龙汽车零部件有限公司 | Test stand for pressure-limiting valve opening pressure |
| DE102009045369A1 (en) * | 2009-10-06 | 2011-04-07 | Robert Bosch Gmbh | Method for examining operability of high-pressure pump of common-rail-diesel internal-combustion engine of motor vehicle, involves examining operability of high-pressure pump based on measured fuel pressure in high pressure storage unit |
| CN201610839U (en) * | 2009-12-30 | 2010-10-20 | 上海高压油泵厂有限公司 | Double-speed oil pump test-bed hydraulic device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528811A (en) * | 2013-10-29 | 2014-01-22 | 宁波圣龙汽车动力系统股份有限公司 | Air testing method for opening pressure of automatic transmission pressure regulating valve |
| CN103528811B (en) * | 2013-10-29 | 2016-06-15 | 宁波圣龙汽车动力系统股份有限公司 | The air testing method of pressure opened by automatic gear-box pressure-regulating valve |
| 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 |
| 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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| Publication number | Publication date |
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| CN102518581B (en) | 2015-04-22 |
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