Hydraulic movable arm potential energy recovery system and method

Abstract

The invention discloses a hydraulic movable arm potential energy recovery system and method. The hydraulic movable arm potential energy recovery system comprises an oil tank, a variable pump, a motor,a three-position four-way reversing valve, a hydraulic cylinder, a first two-position two-way reversing valve, a piezoelectric transducer and an energy accumulator. The oil tank and the motor are both connected to the variable pump, the output end of the variable pump is connected with a first inlet of the three-position four-way reversing valve, a first outlet of the three-position four-way reversing valve is connected with an inlet of the hydraulic cylinder, and an outlet of the hydraulic cylinder is connected with a second inlet of the three-position four-way reversing valve; a second outlet of the three-position four-way reversing valve is connected with an inlet of the first two-position two-way reversing valve, and a first outlet of the first two-position two-way reversing valve isconnected with the piezoelectric transducer; and the piezoelectric transducer is connected with an inlet of the energy accumulator, and an outlet of the energy accumulator is connected to the variablepump. According to the hydraulic movable arm potential energy recovery system and method, a piezoelectric power generating technology is applied to a hydraulic system with the energy accumulator forenergy recovery so as to achieve secondary energy recovery, hydraulic energy is rapidly converted into electric energy to be stored, and then recovery and reusing of the energy are achieved.

Description

technical field [0001] The invention belongs to the technical field of hydraulic vibration energy recovery and power generation, and in particular relates to a hydraulic boom potential energy recovery system and method. Background technique [0002] As an important part of the equipment industry, construction machinery is widely used in national defense construction projects, transportation construction, energy industry construction and production, mining and other raw material industry construction and production, agriculture, forestry and water conservancy construction, industrial and civil construction, urban construction, environmental protection, etc. application in a field. As a member of construction machinery, hydraulic excavators have the characteristics of high energy consumption and low emissions, resulting in a large amount of energy waste and loss, resulting in serious environmental pollution and energy waste. Therefore, the hydraulic system of hydraulic excavat...

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Problems solved by technology

As a member of construction machinery, hydraulic excavators have the characteristics of high energy consumption and low emissions, resulting in a large amount of energy waste and loss, resulting in serious environmental pollution and energy waste. Therefore, the hydraulic system of hydraulic excavators is improved to achieve energy saving and emission reduction. The purpose has very necessary research significance

[0003] During the operation of the hydraulic excavator, the boom frequently rises and falls, and more downward potential energy will be generated during the lowering process of the boom. At present, the recovery and utilization of this part of energy adopts the method of connecting the return circuit of the hydraulic cylinder in the hydraulic system in series with the hydraulic pressure. One end of the motor performs energy conversion and then stores energy through the battery for secondary energy recovery and utilization, resulting in many energy conversion links and a relatively complex structure, or using an accumulator to recover energy, and the single energy recovery process cannot effectively realize energy conversion.

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