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Excavator hydraulic hybrid system

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

Active Publication Date: 2016-07-06
SINOTRUK QINGDAO HEAVY IND
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  • Summary
  • 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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  • Excavator hydraulic hybrid system

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Effect test

Embodiment

[0020] refer to figure 1 , the excavator hydraulic hybrid power system of this embodiment is connected with the hydraulic rotary motor of the excavator, and it includes variable pump I1, variable pump II2 connected in opposite directions, and check valve 3, reversing valve I4, reversing valve II7 , accumulator 5, shuttle valve I6, 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 5 and the The reversing valve I4 is connected, and the variable displacement pump II2 is connected with the accumulator 5 through the check valve 3 .

[0021] In the excavator hydraulic hybrid power system of this embodiment, when the swing motor starts to rotate in the forward direction, it is assumed that oil enters port A and oil exits port B, and the high-pressure oil generated by the hydraul...

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Abstract

The invention discloses a hydraulic hybrid power system of an excavator, which is connected with the hydraulic rotary motor of the excavator. 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 two shuttle valves through the reversing valve, the accumulator is connected to a reversing valve, and the variable pump II is connected to the one-way valve. Connect to the accumulator. It can effectively absorb the energy when the excavator turns and brake, and release it when the excavator rotates in reverse, so as to achieve energy recovery and utilization, protect the hydraulic system and components, avoid hydraulic shock and overflow heat, and improve the performance. The service life of hydraulic components 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 Patents(China)
IPC IPC(8): E02F9/22
Inventor 李可爱吕超马旭峰王显州滕英兰
Owner SINOTRUK QINGDAO HEAVY IND
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