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Active and passive compound control system for hybrid power hydraulic excavator

A hydraulic excavator and compound control technology, applied in the field of hydraulic systems, can solve the problems of throttling loss and large discharge, and achieve the effects of eliminating throttling loss, eliminating the need for pilot oil sources, and reducing heat generation

Active Publication Date: 2015-01-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current hybrid technology mostly uses a centralized power source, which has problems such as large throttling loss and emissions.

Method used

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  • Active and passive compound control system for hybrid power hydraulic excavator
  • Active and passive compound control system for hybrid power hydraulic excavator
  • Active and passive compound control system for hybrid power hydraulic excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 2 As shown, the active and passive compound control system of the hybrid hydraulic excavator in this embodiment includes boom hydraulic cylinder 1, stick hydraulic cylinder 2, bucket hydraulic cylinder 3, swing motor 4, power source 5, and coupling 6 , transfer case 11, A motor generator 13, B motor generator 14, revolving body 15, power supply system 44 and control circuit, the power supply system includes a shared DC bus 7, a main power switch 8, a rectifier 9, a smoothing capacitor 10, and a storage battery 12 and inverter 40; the control circuit includes boom cylinder control valve group 16, arm cylinder control valve group 17, swing motor control valve group 18, bucket control valve 20, swing control valve 21, and the serial numbers are Ⅰ to Ⅶ The I-VII two-position two-way valves 24-30, the I and II two-position three-way valves 32, 33, the I and II accumulators 34, 35, the A hydraulic pump 36, and the B hydraulic pump 37 and C hydraulic pump 38; ...

Embodiment 2

[0044] Such as Figure 4 As shown, the active and passive compound control system of the hybrid hydraulic excavator in this embodiment includes boom hydraulic cylinder 1, stick hydraulic cylinder 2, bucket hydraulic cylinder 3, swing motor 4, power source 5, and coupling 6 , transfer case 11, A motor generator 13, B motor generator 14, rotating body 15, shared DC bus 7, main power switch 8, rectifier 9, smoothing capacitor 10, battery 12, inverter 40 and control circuit, The control loop includes the boom cylinder control valve group 16, the arm cylinder control valve group 17, the bucket control valve 20, the swing control valve 21, and the I-V two-position two-way valves 24 to 28 whose serial numbers are I to V in sequence. , the first two-position three-way valve 32, the first and second accumulators 34, 35, the A hydraulic pump 36, the B hydraulic pump 37; the power source 5 is connected to the transfer case, and the A motor generator is connected to the The transfer case...

Embodiment 3

[0050] Such as Figure 5 As shown, the active and passive composite control system of the hybrid hydraulic excavator in this embodiment includes boom hydraulic cylinder 1, arm hydraulic cylinder 2, bucket hydraulic cylinder 3, swing motor 4, coupling 6, and power source A 41. B power source 42, C power source 43 and the control circuit, the control circuit includes the boom cylinder control valve group 16, the arm cylinder control valve group 17, the swing motor control valve group 18, the bucket control valve 20, and the swing control valve 21. The I-VIII two-position two-way valves 24 to 31, the I and II two-position three-way valves 32, 33, and the I and II accumulators 34 and 35, whose serial numbers are I to VIII in sequence.

[0051] A power source 41, B power source 42, and C power source 43 in the figure all include a power source 5 and a D hydraulic pump 39, and the D hydraulic pump is connected to the power source, and the power source of the A power source is connec...

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Abstract

The invention discloses an active and passive compound control system for a hybrid power hydraulic excavator. According to the active and passive compound control system for the hybrid power hydraulic excavator, a control circuit comprises a hydraulic pump A, a hydraulic pump B, a hydraulic pump C, a movable arm cylinder control valve bank, a bucket rod cylinder control valve bank, a bucket control valve, a rotation control valve, a rotating motor control valve bank, a two-position and two-way valve I, a two-position and two-way valve II, a two-position and two-way valve III, a two-position and two-way valve IV, a two-position and two-way valve V, a two-position and two-way valve VI, a two-position and two-way valve VII, a two-position and three-way valve I, a two-position and three-way valve II, an energy accumulator I and an energy accumulator II, an open type control circuit is adopted to serve as the control circuit, the two cavities of a hydraulic cylinder are each controlled through a power source, and the pressure and the flow of each cavity are regulated independently. The active and passive compound control system for the hybrid power hydraulic excavator has the multiple technical advantages that the energy efficiency is high, the degree of integration is high, power consumption is low, power supply redundancy is avoided, a pilot oil source is not needed, the noise is low, and kinetic energy recovery and potential energy recovery are integrated.

Description

technical field [0001] The invention belongs to the technical field of hydraulic systems, and in particular relates to an active and passive composite control system for a hybrid power hydraulic excavator. Background technique [0002] With the tremendous development of my country's construction machinery industry, excavators have become one of the important pillar industries. Therefore, how to effectively reduce the energy consumption of hydraulic excavators during work, and at the same time, the research on its power, transmission, hydraulic systems and energy recovery technology has become an important research direction and research hotspot in mechanical engineering disciplines at home and abroad. [0003] The introduction of hybrid power into the excavator can improve the matching effect of the engine and the hydraulic system, make the engine work more in the high-efficiency area, reduce fuel consumption, and at the same time use electrical methods to recycle the wasted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/20E02F9/22
Inventor 权龙郝惠敏熊晓燕程珩韩晓红
Owner TAIYUAN UNIV OF TECH
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