Recovering system for slewing and braking energy of excavator

A technology for slewing braking energy and recovery system, which is applied to fluid pressure actuation system components, earthmoving machines/shovels, mechanical equipment, etc. The working performance of the slewing mechanism will affect the working life of the system and other problems, so as to improve the energy reuse rate, the structure is simple, and the effect of preventing the reversal of the turntable can be achieved.

Active Publication Date: 2015-02-25
福建华南重工机械制造有限公司
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AI Technical Summary

Problems solved by technology

Braking energy is mostly dissipated in the form of heat energy, causing heat generation in the hydraulic slewing system, reducing the working performance of the slewing mechanism, resulting in greater energy loss and affecting the working life of the system
In addition, due to the hydraulic shock and the reverse phenomenon of the slewing motor when the slewing system of the hydraulic excavator is braked, it seriously affects the service life of the excavator and the operator's comfort and sense of security.

Method used

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  • Recovering system for slewing and braking energy of excavator
  • Recovering system for slewing and braking energy of excavator

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Embodiment Construction

[0016] see figure 1 and figure 2 As shown, an excavator slewing braking energy recovery system of the present invention includes a hydraulic accumulator 1, an ECU control unit 2, a variable displacement pump 3, a control valve assembly 4, a slewing motor 5, and a pressure sensor assembly 6; The engine 7 of the excavator (not shown) is connected to the variable pump 3, and the ECU control unit 2 controls the hydraulic accumulator 1, the variable pump 3, and the swing motor 5 through the control valve assembly 4; The control unit 2 respectively collects the pressure of the hydraulic accumulator 1, the pilot valve 81, and the swing motor 5 through the pressure sensor assembly 5; the swing motor 5 drives the turntable 8 of the excavator; the ECU control unit 2 collects the pressure of the pressure sensor assembly 6 The feedback signal controls the on-off of the control valve assembly 4, converts the inertial energy of the turntable 8 of the excavator into hydraulic energy and st...

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Abstract

The invention provides a recovering system for slewing and braking energy of an excavator. A hydraulic energy accumulator serves as an energy storage element, a slewing motor / pump serves as an energy conversion element, inertia energy of a rotary table is converted into hydraulic energy and stored in the energy accumulator, namely, in the braking process, the slewing motor operates in the pump working condition, the slewing and braking energy of the excavator is recovered and stored in the energy accumulator, the energy is released during starting of the next time, by means of the control over energy distribution of an engine and the energy accumulator (a main power source and an auxiliary power source), the slewing and braking energy of the excavator is recovered and reused, and the purpose of energy saving is achieved.

Description

technical field [0001] The invention relates to the energy-saving field of hydraulic excavators, in particular to an excavator slewing brake energy recovery system. Background technique [0002] At present, the research on energy recovery is mainly concentrated in the field of automobiles. The research on energy recovery in the field of construction machinery, especially hydraulic excavators, is still in its infancy, and supercapacitors or batteries are generally used as energy storage components. The anti-reverse valve is installed, but the phenomenon of hydraulic shock and motor reverse during braking is still serious. However, the traditional method of improving the braking performance of the slewing system of the excavator has great limitations. For example, reducing the operating speed of the reversing valve will affect the working efficiency of the system; reducing the overflow pressure of the safety valve will seriously affect the safety of the excavator. [0003] Hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22F15B21/14
Inventor 张树忠江吉彬练国富
Owner 福建华南重工机械制造有限公司
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