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Quick response power system for engineering machinery

A power system and fast response technology, which is applied to earth movers/excavators, construction, etc., can solve problems such as hydraulic pump speed cannot be adjusted in time, power system operation delay, power system response slow, etc., to improve energy utilization , reduce the response speed and improve work efficiency

Active Publication Date: 2016-03-30
山西华固天成建筑工程有限公司
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Problems solved by technology

However, when the electro-hydraulic excavator starts, brakes, or accelerates and decelerates, because the motor lacks a braking system, the entire power system responds slowly during this process, so the power system is more prone to operation delays, and frequently causes Energy waste, so the energy utilization rate of the system at this rated power is low, and the hydraulic pump speed cannot be adjusted in time according to the pressure change of the hydraulic components

Method used

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  • Quick response power system for engineering machinery
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Examples

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Embodiment

[0024] Example: such as figure 1 As shown, the fast response power system of the excavator includes the actuator Ⅰ and the power fast response unit Ⅱ.

[0025] The actuator I includes: A electromagnetic reversing valve 1a, B electromagnetic reversing valve 1b, C electromagnetic reversing valve 1c, D electromagnetic reversing valve 1d, A hydraulic cylinder 2a, B hydraulic cylinder 2b, C hydraulic cylinder 2c, working hydraulic pressure Pump 3, cylinder 8;

[0026] A electromagnetic reversing valve 1a, B electromagnetic reversing valve 1b, C electromagnetic reversing valve 1d and D electromagnetic reversing valve 1d are all three-position four-way reversing valves;

[0027] A hydraulic cylinder 2a, B hydraulic cylinder 2b and C hydraulic cylinder 2c are respectively connected to an oil inlet and an oil outlet on the side of the corresponding A electromagnetic reversing valve 1a, B electromagnetic reversing valve 1b and C electromagnetic reversing valve 1c connection, the worki...

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Abstract

The invention belongs to the technical field of power control systems for engineering machinery, and discloses a quick response power system for the engineering machinery. The quick response power system comprises an executing mechanism and a power quick response unit; the executing mechanism is composed of an oil cylinder, a work hydraulic pump, three three-position four-way reversing valves and three hydraulic cylinders; the power quick response unit is composed of an energy accumulator, a first solenoid reversing valve, a safety valve, a second solenoid reversing valve, an oil cylinder, a one-way valve, a power hydraulic pump, an electromotor, a motor frequency converter, a control unit and a pressure sensor. According to the invention, the rotation speed of the hydraulic pumps can be timely, quickly and efficiently regulated according to the specific change conditions of the pressure of hydraulic components, the energy utilization rate can be increased, and the rated power provided by a hydraulic machinery power system, namely the rated power of the electromotor can be lowered.

Description

technical field [0001] The invention belongs to the technical field of construction machinery power control systems, and is applicable to construction machinery powered by grid or battery electric energy, including excavators, forklifts and loading vehicles. Background technique [0002] Construction machinery is a general term for construction machinery used in engineering construction. Widely used in engineering fields such as construction, water conservancy, electric power, roads, mines, ports and national defense, with a wide variety. For a long time, most engines of construction machinery are high-power diesel engines. [0003] Due to its high rated power, the traditional power mode diesel engine not only has relatively expensive cost, but also the consumption of a large amount of diesel has caused certain pollution to the environment. In recent years, hybrid construction machinery has developed rapidly, but the switching between diesel engines and electric motors of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22
CPCE02F9/2217E02F9/2221E02F9/2264
Inventor 权龙王翔宇黄家海熊晓燕
Owner 山西华固天成建筑工程有限公司
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