Hydraulic walking test system and test method for hydraulic walking system of excavating machine

A test method and test system technology, applied in the hydraulic field, can solve problems such as the evaluation test of the hydraulic walking system.

Active Publication Date: 2014-03-19
ZOOMLION HEAVY IND CO LTD
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  • Abstract
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Problems solved by technology

[0004] The invention provides a walking hydraulic testing system of an excavator and a testing method thereof, which can solve the tech...

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  • Hydraulic walking test system and test method for hydraulic walking system of excavating machine
  • Hydraulic walking test system and test method for hydraulic walking system of excavating machine
  • Hydraulic walking test system and test method for hydraulic walking system of excavating machine

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] see figure 1 , figure 1 It is a schematic diagram of the hydraulic circuit principle and the electric control principle of the preferred embodiment of the walking hydraulic test system of the excavator of the present invention. In this embodiment, the walking hydraulic test system preferably includes: hydraulic oil tank 10, prime mover M, first main pump 11, second main pump 12, pilot pump 13, first motor control valve 14, second motor control valve 15 , Action control valve group 16, first hydraulic motor 17, second hydraulic motor 18, first load pressure regulating valve group 19, second load pressure regulating valve group 20, first pilot oil pressure sensor 21, second pilot oil pressure Sensor 22, third pilot oil pressure sensor 23, fourth pilot oil pressure sensor 24, first motor pressure sensor 25, second motor pressure sensor 26, third...

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Abstract

The invention discloses a test method for a hydraulic walking system of an excavating machine. The test method comprises the steps as follows: detecting hydraulic pressure P21 of a first hydraulic fluid port and hydraulic pressure P22 of a second hydraulic fluid port of a first hydraulic motor of the hydraulic walking system, detecting flow Q1 of the first hydraulic fluid port of the first hydraulic motor, and detecting hydraulic pressure P1 of guide oil used for controlling the flow of the first hydraulic motor; during braking of the hydraulic walking system, adjusting the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port of the first hydraulic motor according to the detected P21 and P22 values to enable the values to be constant, controlling the hydraulic pressure P1 of the guide oil to change linearly according to the detected P1 value, and evaluating the maneuverability of the first hydraulic motor simultaneously according to the change linearity of the detected flow Q1 value of the first hydraulic fluid port of the first hydraulic motor. The invention further discloses a walking test system of the excavating machine corresponding to the method. With the adoption of the scheme, the maneuverability of the hydraulic walking system can be evaluated based on an actual working status of the hydraulic walking system.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a walking hydraulic test system of an excavator and a testing method for the hydraulic walking system thereof. Background technique [0002] The hydraulic travel system is one of the key transmission subsystems of the excavator. Its reliability and performance not only directly affect the applicability of the excavator to the working conditions, but even cause huge economic losses to customers. Therefore, the performance test and evaluation of the hydraulic travel system is one of the most important tasks of the excavator performance test. The superiority of the hydraulic travel system is not only guaranteed by the component performance of the hydraulic travel motor, but also directly affected by the matching performance of the travel motor and the whole machine. For testing and evaluation, the test method of the walking system should not only consider the performance of the ...

Claims

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Application Information

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IPC IPC(8): E02F9/22F15B19/00
Inventor 冯坤鹏侯伟李珍袁治远袁蒙
Owner ZOOMLION HEAVY IND CO LTD
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