Movable arm energy-saving control system

Abstract

The invention discloses a movable arm energy-saving control system which comprises a first oil tank, a variable pump, a motor, an overflow valve, a one-way valve, a three-position three-way electromagnetic directional valve, a movable arm oil cylinder, a first pressure sensor, a first hydraulic one-way valve, a two-position three-way electromagnetic directional valve, a first two-position two-way electromagnetic directional valve, a second oil tank, a second two-position two-way electromagnetic directional valve, a second pressure sensor, a constant displacement motor, a variable displacement motor, an optical-electricity encoder, a second hydraulic control one-way valve, an energy storage device, a third oil tank, a third two-position two-way electromagnetic directional valve and a computer. The movable arm energy-saving control system adopts a hydraulic energy recovery mode that a hydraulic transformer composed of the constant displacement motor and the variable displacement motor is used as an energy converting component, and the hydraulic energy storage device is used as an energy storage component, has the advantages of being safe, low in cost, high in efficiency and the like, has great development potentiality in engineering machinery, and especially has important development potentiality in saving energy of hydraulic excavators.

Description

technical field [0001] The invention relates to the field of engineering machinery energy saving, in particular to a boom energy saving control system for recovering and reusing boom potential energy of a hydraulic excavator. Background technique [0002] In the field of construction machinery, hydraulic excavators are widely used, but their energy utilization rate is relatively low. When the arm of a traditional hydraulic excavator is lowered, the lowering potential energy of the entire arm is consumed on the throttle valve port, and the potential energy is converted into heat loss. The energy loss is serious. And these energy losses are also losses of electrical energy. Construction machinery and equipment consume a lot of electricity, and improving the energy saving of equipment is of great significance to both the reduction of the cost of the enterprise and the country's energy conservation and emission reduction. Contents of the invention [0003] Purpose of the inv...

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Problems solved by technology

[0002] In the field of construction machinery, hydraulic excavators are widely used, but their energy utilization rate is relatively low. When the arm of a traditional hydraulic excavator is lowered, the lowering potential energy of the entire arm is consumed on the throttle valve port, and the potential energy is converted into heat loss. drop, serious energy loss

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