Oil electric compound energy-saving type closed-loop control system and control method thereof

Abstract

The invention relates to a hydraulic control system and a control method thereof, in particular to a hydraulic closed-loop energy-saving control system and a control method thereof. The system consists of a controller, a servo drive, a servo motor, a drive power device, a hydraulic circuit, a forward control circuit and a feedback circuit; the forward control circuit is connected with the controller, the servo drive, the drive power device and the servo motor in sequence; the power output end of the servo motor is connected with an oil pump; the working signal of the servo motor is fed back to the power device by the feedback circuit; a pressure sensor is arranged in the hydraulic circuit; and the signal circuit of the pressure sensor is connected with the controller. The invention has the advantages that the energy-saving effect is markedly improved, the stability of the speed is enhanced, the oil temperature is lowered, and the using cycle of a sealing part is extended, thereby prolonging the service life of the whole machine, and the like.

Description

technical field [0001] The invention relates to a hydraulic control system and a control method thereof, in particular to a hydraulic closed-link energy control system and a control method thereof. Background technique [0002] The electro-hydraulic control system has been widely used for its advantages of fast response and high precision. The electro-hydraulic control system mainly includes two categories: throttling control system and volumetric control system. In many hydraulic systems, especially in throttle-controlled hydraulic systems, the actual oil consumption of the load is less than the oil supply of the oil pump in most of the time, causing the hydraulic oil to overflow through the relief valve under high pressure. The overflow part not only has no effect, but also generates heat, causing the hydraulic oil to heat up, making the temperature of the hydraulic system higher, accelerating the deterioration of the hydraulic oil, and causing a great waste of energy. Fo...

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Problems solved by technology

[0003] The present invention mainly solves the technical problems of hydraulic equipment in the prior art, such as many overflows, high oil temperature, large energy loss, inaccurate control of the motor, and low degree of automation, and provides a hydraulic device with less overflow and high oil temperature. Fuel-electric hybrid energy-saving closed-loop control system with low cost, energy saving, readiness and high degree of automation and its control method

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