An automatic control lifting hydraulic cylinder potential energy recovery system and method

Abstract

The invention discloses an automatic control potential energy recovery system and method for a lifting hydraulic cylinder. The automatic control potential energy recovery system comprises a variable pump, an overflow valve, a three-position four-way reversing valve, the lifting hydraulic cylinder and other components. The three-position four-way reversing valve is connected with the variable pumpand an upper cavity of the hydraulic cylinder, a lower cavity of the hydraulic cylinder is connected with a first two-position three-way reversing valve and the three-position four-way reversing valve, the first two-position three-way reversing valve is connected with an oil tank and a variable motor, the variable motor is connected with a water pump, the input end of the water pump is connected with a lower water tank, and the output end of the water pump is connected with a second two-position three-way reversing valve. The second two-position three-way reversing valve is connected with an upper water tank and a cooler, a temperature sensor is connected with the oil tank, a liquid level sensor is connected with the upper water tank, and a controller is connected with the temperature sensor, the liquid level sensor, the first two-position three-way reversing valve and the second two-position three-way reversing valve. The potential energy when the lifting hydraulic cylinder descends can be recovered, meanwhile the recovered potential energy can be converted into the potential energy of water and can also be used for cooling a hydraulic system, and the utilization rate of energy isincreased.

Description

technical field [0001] The invention relates to the field of heavy machinery, in particular to an automatically controlled lifting hydraulic cylinder potential energy recovery system and method. Background technique [0002] Heavy machinery plays an important role in the production activities of the national economy. There is a large amount of gravitational potential energy in the lifting hydraulic cylinder in heavy machinery and the weight it lifts. When the hydraulic cylinder descends, a large amount of gravitational potential energy often passes through the hydraulic valve. The throttling effect is transformed into heat energy and dissipated in vain, which increases the production cost of the enterprise and causes huge energy waste. If we recycle this part of energy through some means, it will have great significance for enterprises to reduce production costs and save energy and protect the environment. [0003] The lifting hydraulic cylinder performs regular reciprocati...

AI Technical Summary

Problems solved by technology

[0003] The lifting hydraulic cylinder performs regular reciprocating lifting movements, and the potential energy is recovered when it is lowered. Usually, a hydraulic motor is arranged in the oil return line to connect the generator to generate electricity, and then it is sent to the battery for storage through a rectifier. However, there are many energy conversions in this process. , the energy recovery efficiency is low, and the cost of a large-capacity power storage device is high

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