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Method for acquiring characteristic parameters of displacement control mechanism of hydraulic pump and detection device

A technology of control mechanism and characteristic parameters, applied in pump control, fluid pressure actuation device, pump test, etc., can solve problems such as difficulty in evaluating the accuracy and reliability of results, avoid high cost, high measurement accuracy, measurement accuracy, etc. Good real-time effect

Inactive Publication Date: 2009-12-23
SANY HEAVY IND CO LTD (CN)
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  • Abstract
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Problems solved by technology

[0014] Therefore, it is currently not possible to obtain output flow parameters with high accuracy and reliability at a low cost. Furthermore, it is difficult to guarantee the evaluation results while using the output flow parameters to evaluate the performance of the displacement control mechanism while keeping the cost low. accuracy and reliability

Method used

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  • Method for acquiring characteristic parameters of displacement control mechanism of hydraulic pump and detection device
  • Method for acquiring characteristic parameters of displacement control mechanism of hydraulic pump and detection device

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Experimental program
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Effect test

Embodiment 1

[0047] The detection device of the hydraulic pump displacement control mechanism provided in Embodiment 1 includes a prime mover 600, a loading device 400, a first pressure detection device 200 and a second pressure detection device 300; the figure also shows the hydraulic pump 100 to be tested, The hydraulic pump 100 has a displacement control mechanism 110 and a variable mechanism 120, the input end of the displacement control mechanism 110 communicates with the outlet of the hydraulic pump, and the output end communicates with the variable mechanism 120; the prime mover 600 is used to drive the hydraulic pump 100 to run The loading device 400 is connected to the outlet of the hydraulic pump to form the load of the hydraulic pump 100; the first pressure detection device 200 and the second pressure detection device 300 are respectively connected to the output end of the displacement control mechanism 110 and the hydraulic pump The outlets are connected to detect the pressure a...

Embodiment 2

[0058] The detection device of the hydraulic pump displacement control mechanism provided in the second embodiment includes: a prime mover 600, a loading device 400, a first pressure detection device 200 and a second pressure detection device 300; oscilloscope 500, and use pressure sensors as the first pressure detection device 200 and the second pressure detection device 300. The wave recorder 500 is connected to the first pressure detection device 200 and the second pressure detection device 300 respectively; the first pressure detection device 200 and the second pressure detection device 300 transmit pressure signals to the wave recorder 500 while detecting pressure.

[0059] Such as Figure 5 As shown, this figure is a flow chart of a method for obtaining the characteristic parameters of the displacement control mechanism 110 by using the detection device of the hydraulic pump displacement control mechanism provided in the second embodiment. The method includes the followi...

Embodiment 3

[0066] The detection device of the hydraulic pump displacement control mechanism provided in Embodiment 3 includes a prime mover 600, a loading device 400, a wave recorder 500 and a first pressure detection device 200. In this example, the detection device of the hydraulic pump displacement control mechanism Only the first pressure detection device 200 is included, and other structures are the same as the detection device of the hydraulic pump displacement control mechanism provided in the second embodiment. In this way, according to the pressure signal output by the first pressure detection device 200, the wave recorder 500 can only generate the pressure time-domain waveform diagram of the output of the displacement control mechanism 110, please refer to Figure 7 , which is a time-domain waveform diagram of the pressure at the output end of the displacement control mechanism obtained by the detection device of the hydraulic pump displacement control mechanism provided in the ...

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Abstract

The invention discloses a method for acquiring characteristic parameters of a displacement control mechanism of a hydraulic pump and a detection device of the displacement control mechanism of the hydraulic pump for implementing the method. The method includes the steps of: building a hydraulic system; detecting pressure including the pressure of an output end of the displacement control mechanism and acquiring intermediate parameters including the time needed for the pressure of the output end of the displacement control mechanism to generate predetermined change; and acquiring the characteristic parameters of the displacement control mechanism according to the intermediate parameters. The method for acquiring the characteristic parameters of the displacement control mechanism can acquire the characteristic parameters of the displacement control mechanism by detecting pressure, can evaluate the performances of the displacement control mechanism according to the acquired characteristic parameters, and does not need to acquire the output flow of the hydraulic pump, thus avoiding problems caused by using a flow meter or a tilt angle sensor to acquire the characteristic parameters.

Description

technical field [0001] The present invention relates to a hydraulic detection technology, in particular to a method for obtaining characteristic parameters of a displacement control mechanism of a hydraulic pump, and the displacement control mechanism is used to regulate and control the displacement of the hydraulic pump; The method is a detection device for a displacement control mechanism of a hydraulic pump. Background technique [0002] Construction machinery generally has the characteristics of large transmission power, low action speed, wide speed range, and complex and changeable control process, which are the advantages of hydraulic transmission. Therefore, hydraulic systems are generally used as the main transmission method in the field of construction machinery. Moreover, there have been many fully hydraulic engineering machinery, such as: fully hydraulic excavators, fully hydraulic bulldozers, fully hydraulic cranes, fully hydraulic graders, fully hydraulic road r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B19/00
CPCF04B2205/04F04B49/002F15B2211/6333F15B11/055F15B2211/6309F15B2211/6652F15B2211/6323F15B2211/20553F15B19/002F15B2211/25F04B49/08F15B2211/6316
Inventor 周翔曹显利
Owner SANY HEAVY IND CO LTD (CN)
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