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Single-pump-source load port independent load-sensitive energy-saving excavator hydraulic system

A hydraulic system, load-sensitive technology, applied in the direction of fluid pressure actuation system components, mechanical equipment, fluid pressure actuation devices, etc., can solve problems such as increased energy consumption, increased heat dissipation equipment, large return oil pressure loss, etc., to reduce Pressure loss, improve transmission efficiency, good power matching effect

Pending Publication Date: 2021-08-06
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, excavators have problems of high energy consumption, poor emissions, and low efficiency of hydraulic transmission systems. Under the background of human society's higher and higher requirements for energy conservation and environmental protection, it is increasingly necessary to improve
[0003] During the working process of the hydraulic excavator, there are constantly negative load conditions and compound action conditions. The negative load is wasted in the form of throttling, which causes the temperature of the hydraulic oil to rise, and additional heat dissipation equipment is required to increase energy consumption.
The current oil inlet and outlet ports of the reversing valve cannot be independently controlled, and the oil return pressure loss is large, resulting in additional throttling loss

Method used

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  • Single-pump-source load port independent load-sensitive energy-saving excavator hydraulic system
  • Single-pump-source load port independent load-sensitive energy-saving excavator hydraulic system
  • Single-pump-source load port independent load-sensitive energy-saving excavator hydraulic system

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Embodiment Construction

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1 to 4 As shown, the present invention has a single pump source load independent load-sensitive energy-saving excavator hydraulic system, including an actuator, a load, a caliber valve 7, a variable cylinder 13, a variable pump 12 , Load sensitive valve 14;

[0018] Wherein, the executing element is connected to the A1 port of the load-load sensitive valve 14, and the B port of the load-sensitive valve 14 communicates with the variable cylinder 13, the piston rod of the variable cylinder 13 is connected to the variable pump 12, the variable pump 12 The oil port is connected to the second fuel tank 11 by the one-way valve, and the T port of the second switching valve 8 is supplied, and the variable pump 12 is separated by the off-load sensitive valve 14 by the one-way valve, respectively. At one end of the A port, the load port independent valve, and one en...

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Abstract

The invention discloses a single-pump-source load port independent load-sensitive energy-saving excavator hydraulic system. A load port independent valve is adopted to independently control an oil inlet and an oil outlet of an execution element, and an energy accumulator is adopted to recycle hydraulic oil in the hydraulic system at the same time. According to the single-pump-source load port independent load-sensitive energy-saving excavator hydraulic system, independent control of the oil inlet and the oil outlet of the execution element can be achieved, meanwhile, negative load energy can be recycled, the transmission efficiency of an excavator is improved, and fuel oil consumption is reduced.

Description

Technical field [0001] The present invention relates to an excavator hydraulic system, specifically a single pump source load independent load-sensitive energy-saving excavator hydraulic system, which belongs to the field of hydraulic energy conservation. Background technique [0002] Excavators are materials such as use bucket to excavate soil, coal, sediment or rocks, and put them into a transport vehicle or an earthwork machinery that is unloaded to the stacker. It has been one of the most important engineering machines in engineering construction. However, there is a problem that the excavator has high energy consumption, the emissions, and the efficiency of hydraulic transmission system, and the more and more demanding improvement in human society on energy conservation and environmental protection requirements. [0003] Hydraulic excavators continue to have negative load conditions and composite action conditions during operation, and negative loads are wasted in the form o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/08F15B13/02F15B1/02F15B21/00
CPCF15B1/02F15B11/08F15B13/02F15B13/027F15B21/00
Inventor 刘成强孙涛张磊韩翔宋威马西良刘磊于萍孙健
Owner XUZHOU UNIV OF TECH
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