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Engineering machinery electro-hydraulic-mixed low-energy-consumption swing driving system

A technology of slewing drive and construction machinery, which is applied in the direction of earth mover/shovel, construction, etc., can solve the problems of large power grid impact, low energy efficiency, high cost, etc., to improve work efficiency, high utilization efficiency, and reduce temperature rise Effect

Active Publication Date: 2013-08-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention improves the existing technology to overcome the energy consumption braking of the slewing system in the prior art, which has low energy efficiency, feeds power to the grid, has a large impact on the grid, and has a large energy storage volume and high cost of the supercapacitor. Direct energy storage of the energy device affects the performance of the slewing brake, and provides a hydraulic-electric hybrid low-energy slewing drive system for construction machinery

Method used

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  • Engineering machinery electro-hydraulic-mixed low-energy-consumption swing driving system
  • Engineering machinery electro-hydraulic-mixed low-energy-consumption swing driving system
  • Engineering machinery electro-hydraulic-mixed low-energy-consumption swing driving system

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Embodiment 1

[0038] as attached figure 1 And attached figure 2 , the first embodiment of the present invention will be described. For example, this embodiment is to apply the present invention to a mine-used front shovel hydraulic excavator with a machine weight of 400 tons.

[0039] attached figure 1 Shown is the schematic structural diagram of the hydraulic-electric hybrid control system used in this embodiment to drive the upper vehicle of the mine-used shovel hydraulic excavator to rotate. in the attached figure 1 Among them, the driving system includes a slewing mechanism 15, a slewing drive power source 12, a second reducer 34, an energy recovery hydraulic pump / motor 35, a hydraulic control valve 36, an accumulator group 37, a safety valve 38, a pressure sensor 39, The hydraulic oil tank 40; the hydraulic control valve 36 is a functional module composed of 4 two-position two-way cartridge valves, the energy recovery hydraulic pump / motor 35 is a variable displacement hydraulic pu...

Embodiment 2

[0046] According to attached image 3 And attached Figure 4 , the second embodiment of the present invention will be described. For example, this embodiment is to apply the present invention to bucket capacity 25 m 3 The mechanical mining front shovel excavator is also often called an electric shovel.

[0047] attached image 3 Provided is the structural principle diagram of the hydraulic-electric hybrid control system used to drive the upper car slewing mechanism of the mechanical mining face shovel excavator according to the second embodiment of the present invention. in the attached image 3 Among them, the driving system includes a slewing mechanism 15, a slewing drive power source 12, a second reducer 34, an energy recovery hydraulic pump / motor 35, a hydraulic control valve 36, an accumulator group 37, a safety valve 38, a pressure sensor 39, The hydraulic oil tank 40; the hydraulic control valve 36 is a functional module composed of 4 two-position two-way cartridge...

Embodiment 3

[0053] According to attached Figure 5 And attached Figure 6 , the third embodiment of the present invention will be described. For example, this embodiment applies the present invention to a backhoe hydraulic excavator weighing 20 tons.

[0054] attached Figure 5 Shown is the principle of the hydraulic-electric hybrid control system for the boarding and turning of a large backhoe hydraulic excavator according to the third embodiment of the present invention. in the attached Figure 5 Among them, the driving system includes a slewing mechanism 15, a slewing drive power source 12, a second reducer 34, an energy recovery hydraulic pump / motor 35, a hydraulic control valve 36, an accumulator group 37, a safety valve 38, a pressure sensor 39, Hydraulic oil tank 40; energy recovery hydraulic pump / motor 35 adopts electronic proportional control variable displacement hydraulic pump / motor, hydraulic control valve 36 adopts pilot type proportional directional valve, accumulator gr...

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Abstract

According to an engineering machinery electro-hydraulic-mixed low-energy-consumption swing driving system, a second reducer is arranged on one side of a swing mechanism and connected with an energy recovery hydraulic pump / motor, an oil inlet of the energy recovery hydraulic pump / motor and an oil outlet of the energy recovery hydraulic pump / motor are respectively communicated with a hydraulic control valve, the output shaft of the energy recovery hydraulic pump / motor is connected with the input shaft of the second reducer, the output shaft of the second reducer is connected with the swing mechanism, an upper vehicle swing body is driven to rotate relative to a lower vehicle body; the other side of the swing mechanism is connected with a main driving hydraulic motor and a main driving hydraulic pump of the main driving hydraulic motor through a swing driving reducer to form a swing driving power source, and the upper vehicle swing body is driven to rotate relative to the lower vehicle body. Kinetic energy of the upper vehicle swing body before the upper vehicle swing body starts to brake, recycled energy when the upper vehicle swing body accelerates and braking energy of the upper vehicle swing body are stored in a hydraulic accumulator, and therefore the engineering machinery electro-hydraulic-mixed low-energy-consumption swing driving system improves work efficiency of a machine, reduces running cost, and reduces pollution emission of an engine.

Description

technical field [0001] The invention relates to a hydraulic-electric hybrid low-energy slewing drive device, in particular to a slewing drive system for reducing energy consumption in the slewing operation of large-scale mechanical mining excavators and hydraulic excavators, which is applied to vehicles with slewing drive systems Mining and construction machinery. Background technique [0002] Slewing motion is the most frequent working process of various types of construction machinery, such as excavators. Due to the large mass of this type of machinery, it must be continuously accelerated and decelerated during the slewing process. Therefore, it is required to have a large starting torque. Before the braking starts, the machine has a very large kinetic energy. If the control method is not appropriate, on the one hand, the installed power of the rotary drive will be increased, and shock vibration and large energy consumption will be generated. Currently, the rotary drive m...

Claims

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Application Information

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IPC IPC(8): E02F9/20
Inventor 权龙黄家海权仲翊
Owner TAIYUAN UNIV OF TECH