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A loader composite control hydraulic system and its control method

A composite control and hydraulic system technology, applied in the direction of earth mover/shovel, construction, etc., can solve problems such as engine flameout, achieve the effect of strong adaptability and ensure normal operation

Active Publication Date: 2017-09-29
XCMG CONSTR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there are joint actions such as cutting into the stockpile at this time, the possibility of engine stalling is greater

Method used

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  • A loader composite control hydraulic system and its control method
  • A loader composite control hydraulic system and its control method
  • A loader composite control hydraulic system and its control method

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Embodiment Construction

[0048] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] like figure 1 As shown, the loader composite control hydraulic system of the present invention includes a hydraulic oil tank 1, an engine 2, a variable pump 3, a reversing valve block 4, a third shuttle valve 5, a first shuttle valve 6, a second shuttle valve 7, and a distribution valve 8. Pilot valve 11 and pilot oil source block 12; the oil inlet of the variable pump 3 is connected to the hydraulic oil tank 1; the oil outlet P of the variable pump 3 is connected to the oil inlet P1 of the distribution valve 8; the oil return port of the distribution valve 8 T1 is connected with the hydraulic oil tank 1; the oil inlet P2 of the pilot oil source block 12 is connected with the oil outlet P of the variable pump 3; the oil outle...

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PUM

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Abstract

The invention discloses a composite control hydraulic system of a loader, which comprises a hydraulic oil tank, an engine, a variable pump, a reversing valve block, a third shuttle valve, a first shuttle valve, a second shuttle valve, a distribution valve, a pilot valve, a pilot oil source block; and provide a control method using the above-mentioned compound control hydraulic system of the loader, the present invention performs compound control in stages according to the actual working conditions of the loader, so as to ensure that the loader has good fretting when it moves at a slow speed and maneuverability; it can further reduce energy loss during fast action, and can automatically adapt to the actual load to reduce the impact of the load on the pump; automatically adjust the output of the hydraulic system at high pressure and large load to reduce the impact of the load on the engine and ensure that the engine Can run stably and reliably.

Description

technical field [0001] The invention relates to a loader hydraulic system, in particular to a loader composite control hydraulic system and a control method thereof. Background technique [0002] The loader is a kind of construction machinery with a very wide range of uses. Different uses and complex working conditions determine the complexity of its hydraulic system work. At present, the common hydraulic systems of loaders include dual quantitative systems, combined systems of quantitative pumps and variable pumps, and dual variable pump systems. As the society pays more and more attention to energy saving and environmental protection, the variable system with obvious energy saving effect is widely used in construction machinery. Among them, the dual-variable pump system that has attracted much attention is a more advanced variable system. Its typical control method is hydraulic load sensing control. Because of its simple and reliable control method and low cost, it is wi...

Claims

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Application Information

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IPC IPC(8): E02F9/22
Inventor 谢朝阳杨东升任大明马鹏鹏赵梅范小童陈冉马锦锦
Owner XCMG CONSTR MACHINERY
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