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Dry testing method for pressure limiting valve opening pressure

A test method and cracking pressure technology, which is applied in the dry test of the cracking pressure of the pressure limiting valve of the oil pump and the detection field of the pressure limiting valve of the oil pump. Advanced problems, to achieve the effect of short test period, low cost and good operating environment

Active Publication Date: 2007-02-07
FAWER AUTOMOTIVE PARTS
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Problems solved by technology

The traditional opening pressure test of the pressure limiting valve with oil as the medium has high test cost and slow pace. After the test, the product must be drained. After the test, there is still oil in the product, which will pollute the product to a certain extent. The product is clean It is not easy to achieve the index, which brings inconvenience to storage, transportation, and user assembly and use

Method used

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  • Dry testing method for pressure limiting valve opening pressure
  • Dry testing method for pressure limiting valve opening pressure

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Embodiment Construction

[0010] Below in conjunction with accompanying drawing, the present invention will be further described: as figure 1 and figure 2 The dry test method for opening pressure of the pressure limiting valve shown is characterized in that: the test device includes an air source 1; and a pre-inflated pipeline, a pressurized pipeline, and a body cavity pipeline of a one-way valve of the tested test product, and a pre-inflated tube The pressure regulating valve 2 is connected in series with the one-way valve 5; the booster pipeline is connected in series by the electromagnetic reversing valve 3 and the booster mechanism 4, and the pressure regulating valve 2 and the electromagnetic reversing valve 3 at the input end of the two pipelines are connected with the air source 1 Connected in parallel, the output end check valve 5 and booster mechanism 4 are connected in parallel with the cavity of the tested test product, and the input end of the pressure sensor is connected to the cavity of ...

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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: [0001] The present invention relates to a dry test method for opening pressure of a pressure limiting valve, in particular to a dry test method for opening pressure of a pressure limiting valve of an oil pump, and is especially suitable for pressure limiting valves of various types of steel balls and plungers for oil pumps detection. Background technique: [0002] The traditional oil pump pressure limiting valve opening pressure test method uses oil as the test medium. Under the conditions of calibration test oil temperature, viscosity and speed, the regulating valve is used to control the calibration test pressure required by the oil pump product. When the regulating valve is closed, the oil pump will output oil. When the pressure at the port increases, when it is greater than the opening pressure of the pressure limiting valve, the pressure limiting valve opens, and at this time the opening pressure of the pressure limiting valve is obtained through the pr...

Claims

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Application Information

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IPC IPC(8): G01M3/02G01M19/00G01M99/00
Inventor 田友武
Owner FAWER AUTOMOTIVE PARTS
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