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Hydraulic hybrid power system of excavator

A technology of hybrid power system and excavator, which is applied in the direction of earth mover/shovel, construction, etc. It can solve the problems of complicated connection of electrical components, difficult installation and use, and inconvenient maintenance, etc., and achieves simple and feasible control principle and simple installation , Easy installation and maintenance

Inactive Publication Date: 2014-01-29
李宴玲
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: capacitors and other electrical components are used, and the space above the slewing platform of the excavator is narrow, which causes many difficulties for installation and use, and it is inconvenient to maintain after failure, and the connection of electrical components is complicated, bulky, expensive, and short life

Method used

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  • Hydraulic hybrid power system of excavator

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specific Embodiment approach

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, referring to the accompanying drawings, the excavator hydraulic hybrid power system provided by the present invention will be described in detail in combination with an embodiment.

[0019] Examples, see figure 1 , the excavator hydraulic hybrid power system of the present embodiment is connected with the hydraulic slewing motor of the excavator, and it includes the variable pump I 1, the variable pump II2 connected in reverse, and the check valve 3, the reversing valve I 4, the reversing valve Valve II 7, accumulator 5, shuttle valve I 6, shuttle valve II8, the two ends of the shuttle valve are connected to the oil inlet and outlet of the rotary motor, the variable pump I and the variable pump II are respectively connected to the two shuttle valves through the reversing valve, the accumulator The accumulator 5 is connected with the reversing valve I4, and the variable displacement pump II2 is connected...

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Abstract

The invention discloses a hydraulic hybrid power system of an excavator. The hydraulic hybrid power system of the excavator is connected with a hydraulic rotary motor of the excavator and comprises a variable pump I, a variable pump II, a one-way valve, reversing valves, an energy accumulator and shuttle valves, wherein the variable pump I and the variable pump II are connected back to back, the two ends of each shuttle valve are connected with an oil inlet and an oil outlet of the rotary motor, the variable pump I and the variable pump II are connected with the two shuttle valves respectively through the reversing valves, the energy accumulator is connected with one reversing valve, and the variable pump II is connected with the energy accumulator through the one-way valve. The hydraulic hybrid power system of the excavator can effectively absorb the energy generated in the rotary braking process of the excavator, and release the energy in the reverse rotation process of the excavator, thereby achieving recovery of energy. Meanwhile, the hydraulic hybrid power system of the excavator protects a hydraulic system and elements, avoids hydraulic impact and overflowing heat radiation, and prolongs the service life of hydraulic elements and mechanical parts.

Description

technical field [0001] The invention belongs to a hybrid power system of an engineering machinery vehicle, and in particular relates to a hydraulic hybrid power system of an excavator. Background technique [0002] The energy consumption of the slewing mechanism of a single-bucket hydraulic excavator accounts for about 25% to 40%, and the heat generated by the slewing hydraulic oil circuit accounts for about 30% to 40% of the total heat generated by the hydraulic system. Hydraulic impact and overflow heat will inevitably be generated during slewing braking, which will adversely affect the service life of hydraulic components and the thermal balance of the hydraulic system. If this part of energy is recovered and utilized, the system and components will be protected, and energy will be saved. Therefore, people pay more and more attention to the recycling of this part of energy. [0003] In the actual operation of the excavator, rotation is necessary for the operation cycle. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22
Inventor 李宴玲
Owner 李宴玲
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