A pressure limiting valve fatigue test device and method

A technology of fatigue test and pressure limiting valve, which is applied in the direction of measuring devices, testing of mechanical components, testing of machine/structural components, etc. It can solve the problems of unpredictable service life of pressure limiting valve, uncountable number of pressurization cycles, and cyclic loading Single result and other problems, to achieve the effect of simple structure, low cost, and estimated service life

Active Publication Date: 2018-03-13
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is: in order to solve the problem that the existing pressure limiting valve fatigue test equipment uses a purely mechanical structure to simulate the pressure change of the working condition of the pressure limiting valve, it cannot be adjusted flexibly, the simulated cyclic loading result is single, and it cannot simulate the real The working conditions and test data are inaccurate; the number of pressurization cycles cannot be counted, and the service life of the pressure limiting valve cannot be estimated

Method used

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  • A pressure limiting valve fatigue test device and method
  • A pressure limiting valve fatigue test device and method
  • A pressure limiting valve fatigue test device and method

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Experimental program
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Effect test

Embodiment 1

[0049] like Figure 1-3As shown, the present invention discloses a pressure limiting valve fatigue test device, including: a housing 1, an actuator plug 3, a push-pull electromagnet 4 and a host computer, the housing 1 includes an oil storage tank 11 and a pressurized cylinder 12, the The top of the pressurizing cylinder 12 communicates with the bottom of the oil storage tank 11, and both the oil storage tank 11 and the pressurizing cylinder 12 store organic oil;

[0050] The oil inlet end of the pressure limiting valve 2 penetrates into the upper end of the pressurized cylinder 12 through the oil storage tank 11, and the pressure limiting valve 2 is provided with an oil hole 21 communicating with the oil storage tank 11, and the oil is immersed in the The oil hole 21, the oil storage tank 11 is provided with a flow sensor 15 for detecting the oil flow rate at the oil hole 21;

[0051] The actuating plug 3 is located in the pressurizing cylinder 12, the actuating plug 3 is in...

Embodiment 2

[0066] The present invention also discloses a fatigue test method for a pressure limiting valve using the pressure limiting valve fatigue test device described in Embodiment 1, such as Figure 4 As shown, the method includes the following steps:

[0067] S1. Set the test parameters on the host computer; such as the number of executions, the temperature range of the oil required for the experiment, the maximum pressure that the executive plug 3 applies to the oil, etc.;

[0068] S2. Detect the temperature of the engine oil, if the temperature of the engine oil is lower than the minimum set value t, then execute step S3, otherwise execute step S4;

[0069] S3, start the heater 13 to heat the engine oil, and execute step S2;

[0070] S4. Detect the temperature of the engine oil, if the temperature of the engine oil is higher than or equal to the maximum set value T, then execute step S5, otherwise execute step S6;

[0071] S5, the heater 13 stops heating;

[0072] S6, the push...

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Abstract

The present invention belongs to the pressure-limiting valve fatigue test technology field, and discloses a pressure-limiting valve fatigue test device and method. The test device comprises a shell, an execution plug, a push-and-pull electromagnet and an upper computer. A pressure-limiting valve is arranged inside the shell, the push-and-pull electromagnet drives the execution plug to apply pressure on the pressure-limiting valve to simulate the real working condition, and a flow velocity sensor is arranged in an oil storage tank. The test device also comprises a displacement sensor used for detecting the displacement of the execution plug indirectly, and the upper computer is in communication connection with the power supply of a coil, the flow velocity sensor and the displacement sensor separately. According to the present invention, the push-and-pull electromagnet drives the execution plug to do the up and down reciprocating action, and all test parameters can be adjusted, so that various different working conditions can be simulated, and the fatigue test requirements of various types of pressure-limiting valves on different working conditions can be satisfied. The circulation times of the reciprocating motion of the execution plug can be counted, and the purpose of estimating the service life of the pressure-limiting valve can be achieved.

Description

technical field [0001] The invention relates to the technical field of pressure limiting valve fatigue testing, in particular to a pressure limiting valve fatigue testing device and method. Background technique [0002] As a moving part, the pressure limiting valve is assembled on the diesel engine, and it is frequently switched between the open and closed states. It may cause fatigue failure and cause the opening pressure and closing pressure to drop. It cannot meet the original design requirements, which will lead to engine failure, so it needs to be adjusted. Carry out fatigue test verification. [0003] Pressure limiting valve: It is a seal used to limit the oil pressure of the lubrication system not to exceed the specified value in the technical documents to prevent damage. When the oil pressure is less than a certain critical value, the pressure limiting valve is closed, but when the oil pressure is greater than a certain critical value, the pressure limiting valve is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 徐庆增
Owner WEICHAI POWER CO LTD
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