The plate heat exchanger is used in a steam turbine generator to control the change in oil temperature during operation. Its sealing performance and heat transfer performance are very strong.The main components of the plate cooler are composed of an upper and lower water chamber, a casing pipe system and an oil-filled pipe.The inlet and outlet pipes are connected to the casing, and the oil pipe, the drain pipe, the oil discharge pipe, the exhaust pipe and the temperature gauge seat are arranged.The normal operation of the steam turbine generator set consumes a part of the work due to the friction of the bearing. The oil water cooler will be converted into heat to raise the temperature of the lubricating oil of the bearing. If the oil temperature is too high, the bearing may be softened, deformed or burnt.
In order for the bearing to operate properly, the temperature of the lubricant should be kept within the range. Generally, the temperature of the bearing oil entering the bearing is 35-45 °C, and the temperature rise of the bearing oil is generally 10~15 °C. Therefore, the oil discharged from the bearing should be cooled before entering the bearing lubrication.The plate heat exchanger is to cool the main engine oil. The higher temperature lubricating oil and the low temperature cooling water exchange heat in the plate cooler, and the purpose of controlling the lubricating oil temperature is achieved by adjusting the cooling water flow rate.Since the rotor temperature is high, the inlet side of the high-pressure cylinder and the oil-water cooler journal also transfer heat outward, so the lubricating oil also has the function of cooling the journal.