Test bench for hydraulic excavator pump valve

A technology for hydraulic excavators and test benches, which is applied in the testing of fluid pressure actuation systems, mechanical equipment, fluid pressure actuation devices, etc., to achieve the effect of being simple to use and suitable for popularization.

Inactive Publication Date: 2011-05-11
SANY HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the correct selection and matching of the hydraulic pump and the main control valve play a vital role in the performance of the excavator. To improve the performance of the excavator, it is necessary to understand the characteristics of the hydraulic pump and the main control

Method used

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  • Test bench for hydraulic excavator pump valve
  • Test bench for hydraulic excavator pump valve
  • Test bench for hydraulic excavator pump valve

Examples

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Example Embodiment

[0021] Example 1: see Figure 1 to 3 As shown, a test bench for pump valves of a hydraulic excavator includes a power mechanism, a hydraulic pump console 3 for installing the hydraulic pump to be tested, a console 4, a pump test bench mechanism 15, and a main control valve for testing. The main control valve test bench mechanism 16 and the pipeline connecting each mechanism, the power mechanism includes a variable frequency motor 1 and a torque sensor 2 connected to the output end of the variable frequency motor, the control end of the variable frequency motor 1 and the console 4 Connected, the signal output terminal of the torque sensor 2 is connected to the console 4;

[0022] The pump test bench mechanism includes two hydraulic pipelines connected in parallel with the hydraulic pump to be tested, and one of the hydraulic pipelines is connected in series with a first pressure gauge 5, a first adjustable overflow valve 6, and a first hydraulic pipeline. The electromagnetic reve...

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Abstract

The invention discloses a test bench for a hydraulic excavator pump valve, comprising a power mechanism, a hydraulic pump operating platform, a control platform, a pump test platform mechanism, a main control valve test platform mechanism and connecting pipelines. The test bench is characterized in that the power mechanism comprises a variable-frequency motor and a torque sensor, wherein the control end of the variable-frequency motor is connected with the control platform; the signal output end of the torque sensor is connected with the control platform; the pump test platform mechanism comprises two hydraulic pipelines which are connected in parallel; the two hydraulic pipelines are internally and respectively provided with a first hydraulic control device and a second hydraulic controldevice, output ports of which are connected with an oil tank by a first flow meter; the main control valve test platform mechanism is provided with a hydraulic pipeline for connecting a hydraulic pump and a main control valve to be tested; a second flow meter is arranged in the hydraulic pipelines in series, and the main control valve test platform mechanism further comprises a hydraulic loop connected with the main control valve; and a third adjustable overflow valve and a third flow meter are connected in the hydraulic loop in series. The test bench disclosed by the invention can be convenient to carry out comprehensive test on the pump valve.

Description

technical field [0001] The invention relates to a test device, in particular to a test stand for a hydraulic pump and a main valve of a hydraulic excavator. Background technique [0002] With the continuous development of science and technology, in the fields of construction, water conservancy and other engineering, various types of construction machinery have begun to be widely used, such as excavators, cranes, bulldozers, etc. These construction machinery used for engineering construction are collectively referred to as construction machinery. Among them, the use of excavators is more common. The main purpose of an excavator is to excavate materials from the ground and transfer them to the unloading point, then return to the excavation site after unloading, and repeat the process. At present, the commonly used excavator is a hydraulic excavator, which has the advantages of flexible construction and high efficiency. Therefore, it is widely used in foundation excavation of ...

Claims

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Application Information

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IPC IPC(8): F15B19/00
Inventor 戴晴华凌荣江纪王芳
Owner SANY HEAVY MACHINERY
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