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Energy-saving turntable drive system for excavators based on dual motors and hydraulic accumulators

A technology of hydraulic accumulator and drive system, applied in the direction of earth mover/shovel, construction, etc., to avoid overflow loss, ensure energy recovery efficiency, and reduce energy loss

Active Publication Date: 2016-08-17
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a large pressure shock

Method used

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  • Energy-saving turntable drive system for excavators based on dual motors and hydraulic accumulators

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Embodiment Construction

[0027] Please check figure 1 , which shows a specific system structure diagram of a preferred embodiment of the present invention, an energy-saving turntable drive system for an excavator based on dual motors and hydraulic accumulators, including a pilot operating handle 1, a first relief valve 2, a pilot Pump 3, variable variable pump 4, engine 5, second relief valve 6, other actuator drive system 7, multi-way valve 8, traditional turntable hydraulic motor drive auxiliary unit 9, Y-type three-position four-way hydraulic control reversing valve 10 , The first two-position three-way hydraulically controlled directional valve 11, the second two-position three-way hydraulically controlled directional valve 12, the first damping hole 13, the second damping hole 14, the first two-position two-way hydraulically controlled directional valve 15. The second two-position two-way hydraulic control reversing valve 16, the first hydraulic control check valve 17, the second hydraulic contro...

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Abstract

The invention discloses an energy-saving rotary table driving system of an excavator based on dual motors and a hydraulic energy accumulator. When a rotary table decelerates and brakes, an auxiliary hydraulic pump / motor works in a pump mode, oil is charged to the hydraulic energy accumulator, rotary brake kinetic energy is converted into hydraulic energy, and the hydraulic energy is stored in the hydraulic energy accumulator, so that the overflow loss of the rotary table in the braking process is avoided; furthermore, due to the fact that the pressure of the hydraulic energy accumulator cannot be suddenly changed, the impact on the rotary table in the braking process is reduced. When the rotary table of a hydraulic excavator accelerates and rotates, the auxiliary hydraulic pump / motor works in a motor mode, the hydraulic energy accumulator releases hydraulic oil, the auxiliary hydraulic pump / motor is driven to assist a hydraulic motor to drive the rotary table to accelerate, and the energy loss of an engine is reduced; the auxiliary hydraulic pump / motor converts the pressure change of the hydraulic energy accumulator into torque change and is coupled to the hydraulic motor through torque, so that the influence on the operation performance of the rotary table caused by the pressure change of the hydraulic energy accumulator when a single hydraulic motor drives the rotary table and the rotary table decelerates and brakes is eliminated.

Description

technical field [0001] The invention relates to an energy-saving turntable driving system of an excavator based on dual motors and hydraulic accumulators. Background technique [0002] Hydraulic excavator is a kind of construction machinery with relatively high power, but its total utilization rate of energy is low. Energy saving and emission reduction for hydraulic excavators has always been the goal pursued by the industry. [0003] The rotary table of the hydraulic excavator has a large inertia and swings frequently. When the rotary table brakes or the hydraulic motor brakes, the oil supply and oil return circuits are cut off, and the pressure of the oil return pipeline increases due to the inertia of the motor. When moving, the braking torque is mainly established through the overflow valve to gradually decelerate the slewing system. Due to the large inertia of the slewing mechanism of the excavator and frequent slewing movements, a large amount of braking energy is con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/20E02F9/22
Inventor 林添良叶月影李钟慎付胜杰任好玲刘晓梅杨帆
Owner HUAQIAO UNIVERSITY
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