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Hydraulic hybrid power system of excavator

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

Active Publication Date: 2010-10-13
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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  • Hydraulic hybrid power system of excavator
  • Hydraulic hybrid power system of excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] refer to 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 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-...

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Abstract

The invention discloses a hydraulic hybrid power system of an excavator, which is connected with a hydraulic rotary motor of the excavator and comprises a variable pump I, a variable pump II, a non-return valve, change valves, an accumulator and shuttle valves, wherein the variable pump I and the variable pump II are reversely connected; two ends of the shuttle valves are connected with the oil inlet and the oil outlet of the rotary motor; the variable pump I and the variable pump II are respectively connected with the two shuttle valves through the change valves; the accumulator is connected with one change valve; and the variable pump II is connected with the accumulator through the non-return valve. The hydraulic hybrid power system can effectively absorb the energy generated when the excavator carries out revolving breaking and release the energy when the excavator rotates reversely, thereby realizing the purpose of recycling the energy, simultaneously protecting hydraulic systems and elements, avoiding hydraulic impact and overflow heating, and prolonging the service lives 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 李可爱吕超马旭峰王显州滕英兰
Owner SINOTRUK QINGDAO HEAVY IND
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