A kind of hydraulic excavator driven by hydraulic-electric hybrid

A hydraulic excavator and hybrid drive technology, applied in the field of hydraulic control, can solve the problems of weak bearing capacity and low power density of electric cylinders, and achieve the effects of high power density, high energy storage and utilization rate, and easy realization.

Active Publication Date: 2020-07-17
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution uses the motor to directly drive the screw mechanism. Although the energy conversion link is reduced, compared with the hydraulic cylinder, the electric cylinder has a lower power density and a weaker load capacity. It is mainly used for motion control of light mechanisms and is difficult to use for direct drive. Heavy-duty robotic arm with large inertia, large load, and frequent acceleration and deceleration

Method used

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  • A kind of hydraulic excavator driven by hydraulic-electric hybrid
  • A kind of hydraulic excavator driven by hydraulic-electric hybrid
  • A kind of hydraulic excavator driven by hydraulic-electric hybrid

Examples

Experimental program
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Effect test

Embodiment 1

[0041] like image 3 As shown, a hydraulic excavator driven by a hydraulic-electric hybrid includes: a slewing motor 5, a left travel motor 6, a right travel motor 7, a boom 34, a stick 35, a bucket 36, and also includes: a secondary adjustment circuit 1 , Boom hydraulic mechanical cylinder 37, stick hydraulic mechanical cylinder 38 and bucket hydraulic mechanical cylinder 39.

[0042] The secondary regulating circuit includes: power source 8, main hydraulic pump 9, first filter 10, oil tank 11, first overflow valve 12, first one-way valve 13, second overflow valve 14, accumulator 15. Pressure sensor 16, second one-way valve 17, second filter 18 and third one-way valve 19, high-pressure pipeline 20 and low-pressure pipeline 21; the power source is mechanically connected to the main hydraulic pump, and the oil suction of the main hydraulic pump The port communicates with the oil tank through the first filter, and the oil outlet P of the main hydraulic pump communicates with th...

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Abstract

The invention discloses a hydraulic-electric hybrid drive hydraulic excavator which comprises a rotary motor, a left walking motor, a right walking motor, a moving arm, a bucket rod, a bucket, a secondary adjusting loop, a moving arm electric-hydraulic mechanical cylinder, a bucket rod electric-hydraulic mechanical cylinder and a bucket electric-hydraulic mechanical cylinder. According to the hydraulic-electric hybrid drive hydraulic excavator, the moving arm electric-hydraulic mechanical cylinder, the bucket rod electric-hydraulic mechanical cylinder and the bucket electric-hydraulic mechanical cylinder are used for replacing traditional hydraulic cylinders, and hydraulic and electric hybrid drive is achieved. The hydraulic-electric hybrid drive hydraulic excavator has the advantages of being simple in structure, energy-saving, efficient, easy to implement and the like.

Description

technical field [0001] The invention belongs to the technical field of hydraulic control, and in particular relates to a hydraulic excavator driven by a hydraulic-electric hybrid drive. Background technique [0002] Hydraulic excavator is a kind of construction machinery with large consumption and high energy consumption in engineering. During the working process, the load inertia of each actuator is large, and each mechanical arm swings up and down frequently, especially the two actuators of the boom and stick. . Traditional hydraulic excavators do not make use of this part of potential energy, but make this part of potential energy be lost in the form of heat energy at the throttle, which not only causes waste of energy, but also causes the temperature rise of the hydraulic system to destroy the stability of the system. Therefore, how to efficiently recycle this part of energy and seek an efficient and energy-saving hydraulic system is of great significance for improving ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F3/28E02F3/42E02F9/22
CPCE02F3/28E02F3/42E02F9/22
Inventor 权龙葛磊张旭飞夏连鹏王波李泽鹏
Owner TAIYUAN UNIV OF TECH
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