Hydraulic type energy recovery system for potential energy of boom of excavator

An energy recovery, hydraulic technology, applied in the direction of fluid pressure actuation system components, mechanical equipment, actuator accumulators, etc., can solve the problem of unstable outlet pressure, long response time for variable pump outlet pressure establishment, and difference in operating performance, etc. problem, to achieve the effect of improving recycling efficiency

Inactive Publication Date: 2015-05-13
FUJIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are three aspects that need to be further improved in this scheme: ① Problems in speed controllability: when the boom begins to descend, the fixed motor-variable pump speed is low, and the response time for the outlet pressure of the variable pump to be established is relatively long. In the interior, the load of the motor is close to 0, and the moment of inertia of the fixed motor-variable pump is very small, and the speed of the fixed motor cannot be controlled by adjusting the displacement of the variable pump, resulting in poor speed stability when it starts; ② In terms of energy recovery efficiency Problems in the aspect: the rotational speed of the energy c

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  • Hydraulic type energy recovery system for potential energy of boom of excavator
  • Hydraulic type energy recovery system for potential energy of boom of excavator
  • Hydraulic type energy recovery system for potential energy of boom of excavator

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[0027] See Figure 1 to Figure 3 As shown, the potential energy hydraulic energy recovery system of the excavating boom includes a variable motor 8, two variable pumps 71, 72, an accumulator 10, control valves 2, 31, 32, 33, 51, 52, 53, 9, 131, 132, 14, 15, ECU control unit 18, pressure sensor 61, 62, 63, 64 speed sensor 4, hydraulic cylinder 11, and fuel tank 1, engine 16;

[0028] The variable motor 8 is coaxially installed with the first variable pump 71 and the speed sensor 4, the inlet of the variable motor 8 is connected in series with the throttle valve 52, and the other end of the variable motor 8 is connected to the throttle valve 51 and the reversing valve 9 in two ways; the throttle valve The other end of 52 is connected to the reversing valve 9, the two working oil chambers of the reversing valve 9 are respectively connected to the upper and lower chambers of the hydraulic cylinder 11; the inlet of the variable pump 71 is connected to the oil tank 1, and the other end...

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Abstract

A hydraulic type energy recovery system for potential energy of a boom of an excavator comprises a variable motor, two variable pumps, an energy accumulator, a control valve, an ECU, a pressure sensor, a revolution speed transducer, a hydraulic cylinder, an oil tank and an engine. Aiming at solving the problems that a great deal of potential energy of a boom of an existing hydraulic excavator under the working condition of severe change is wasted, a hydraulic type energy recovery system is arranged in parallel on the basis of not changing a hydraulic system and the operation performance of the existing excavator; the hydraulic type energy recovery system can recover the potential energy generated when the boom is released downwards, achieve flow regeneration of the boom in order to reduce oil consumption of the hydraulic excavator, and achieve the purpose of saving energy and reducing consumption.

Description

【Technical field】 [0001] The invention relates to the technical field of energy saving of hydraulic excavators, in particular to an excavator arm potential energy hydraulic energy recovery system using a hydraulic accumulator as an energy storage element and a variable variable motor-variable pump as an energy conversion element. 【Background technique】 [0002] During the working process of the hydraulic excavator, the boom swings up and down frequently. The working device of the hydraulic excavator is heavy and has a large inertia. However, during deceleration and braking, a large amount of potential energy of the working device is mostly converted into heat energy at the main valve orifice, which not only causes energy waste, but also leads to an increase in system temperature and a reduction in the life of hydraulic components. [0003] At present, the research on energy recovery is mainly concentrated in the field of automobiles, and the research on energy recovery in th...

Claims

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Application Information

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IPC IPC(8): F15B21/14F15B1/02
CPCF15B1/02F15B21/14F15B2201/00
Inventor 张树忠练国富江吉彬曾寿金叶建华陈丙三晏岱
Owner FUJIAN UNIV OF TECH
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