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A non-invasive method for measuring the dynamic characteristics of the axial piston pump cylinder

An axial piston pump, non-invasive technology, applied in the dynamic characteristic measurement of rotating cylinder, working condition health monitoring and fault diagnosis, non-invasive axial piston pump cylinder dynamic characteristic measurement field, can Solve problems such as insufficient attention to transient characteristics, achieve low test cost, improve test accuracy, and ensure accuracy

Active Publication Date: 2022-04-29
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the tilting behavior of the cylinder block has been studied using the average oil film thickness at the measurement point, but not enough attention has been paid to its transient characteristics

Method used

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  • A non-invasive method for measuring the dynamic characteristics of the axial piston pump cylinder
  • A non-invasive method for measuring the dynamic characteristics of the axial piston pump cylinder
  • A non-invasive method for measuring the dynamic characteristics of the axial piston pump cylinder

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Embodiment Construction

[0022] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0023] Test the pump as figure 1 As shown, the schematic diagram of the hydraulic test circuit used is shown in figure 2 as shown, figure 2 Among them, the motor 1, the torque meter 2, the shaft coupling 3, and the test pump 4 are connected in sequence, and the test pump 4 is connected to the oil tank 12 through the second flow meter 9 and the filter 10 respectively, and at the same time, the test pump 4 is also connected through the control valve 6. The first flow meter 8 and the second filter 11 are connected to the oil tank 12, and the pressure sensor 5 collects the signal of the test pump 4. The temperature regulator 7 and the fuel tank 1...

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Abstract

The invention discloses a non-invasive method for measuring the dynamic characteristics of an axial piston pump cylinder body, which belongs to the field of state monitoring and fault detection. The cylinder block is the main rotating part of an axial piston pump, and its dynamic characteristics are more indicative of the health of the pump than its external characteristics. In order to accurately obtain the dynamic characteristics of the cylinder, a non-contact measurement scheme is proposed to reduce the influence of the detection equipment on the cylinder movement. By measuring the radial displacement of the two sections of the cylinder surface along the mutually perpendicular directions under different working conditions, the cylinder contour signal and the radial displacement signal are obtained, and then the cylinder contour signal is accurately removed from the radial displacement signal to obtain the cylinder contour signal. Pan and tilt motion properties. This measurement method has the advantages of high test accuracy, simple operation, low cost, and can be used in actual working conditions, and is of great significance for monitoring the health status of the pump and fault diagnosis.

Description

technical field [0001] The invention belongs to the field of state monitoring and fault diagnosis, in particular to dynamic characteristic measurement, working condition health monitoring and fault diagnosis of a rotary cylinder. In particular, it relates to a method for measuring the dynamic characteristics of a non-invasive axial piston pump cylinder body. Background technique [0002] In order to meet the needs of intelligent hydraulic systems and components, axial piston pumps require self-information awareness to monitor the health status in operation. On the other hand, fault diagnosis is also an important research field for axial piston pumps. Previous studies on condition monitoring and fault detection of axial piston pumps mainly relied on vibration signals of the casing, supplemented by pressure signals and leakage flow signals. However, the vibration signal of the housing is also affected by other factors. In addition, the fault signal can only be measured if i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B51/00
CPCF04B51/00
Inventor 张军辉赵旗许浩功黄伟迪徐兵
Owner ZHEJIANG UNIV
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