Hydroelectric power balancing driving system of cooling tower fan and control method of system

Abstract

The invention relates to the technical field of a cooling tower and discloses a hydroelectric power balancing driving system of a cooling tower fan. By the aid of the system, the output rotation speed of a hydraulic turbine can be regulated automatically. The system comprises the hydraulic turbine, a variable frequency motor, a rotation speed sensor and a controller, wherein an output shaft of the hydraulic turbine is in transmission connection with a rotating shaft of the fan; an output shaft of the variable frequency motor is in transmission connection with the output shaft of the hydraulic turbine or the rotating shaft of the fan; the rotation speed sensor is arranged on the output shaft of the hydraulic turbine and is used for detecting the rotation speed of the output shaft of the hydraulic turbine; and the controller controls the operation of the variable frequency motor and regulates the output rotation speed of the hydraulic turbine in accordance with the output shaft rotation speed which is detected by the rotation speed sensor. The invention also discloses a control method of the hydroelectric power balancing driving system of the cooling tower fan. The variable frequency motor is used for performing energy compensation for the output shaft of the hydraulic turbine, so that the rotation speed of the output shaft of the hydraulic turbine can meet the requirement of the designed fan rotation speed under the condition of cooling tower temperature lowering. The electricity is saved, the rotation speed of the fan can meet designed requirements, and the fan can operate safely.

Description

technical field [0001] The invention relates to the technical field of cooling towers, in particular to a water and electricity balance drive system for fans of circulating water cooling towers. Background technique [0002] There are currently two power sources for driving cooling tower fans to do work, one is driven by electric motors, and the other is driven by water turbines. The motor-driven method consumes a lot of power, which is not conducive to energy saving; the turbine-driven method has no power consumption, and it uses the surplus energy of the circulating water to do work, but some circulating water systems have insufficient surplus energy, and the output power of the turbine cannot meet the needs of the fan at this time. Due to the design requirements, the exhaust air volume of the fan is insufficient, which affects the cooling effect of the cooling tower. Contents of the invention [0003] In view of this, the object of the present invention is to provide a...

AI Technical Summary

Problems solved by technology

The motor-driven method consumes a lot of power, which is not conducive to energy saving; the hydro-turbine-driven method has no power consumption, and it uses the surplus energy of circulating water to do work, but some circulating water systems have insufficient surplus energy, and the output power of the hydro-turbine cannot meet the requirements of the fan at this time. Design requirements, resulting in insufficient fan exhaust air volume and affecting the cooling effect of the cooling tower

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