Lfa Laval Centrifugal pumps have many advantages over other types of pumps, such as uniform flow, stable operation, low vibration, high speed, low equipment and maintenance costs, and wide application range (including flow, head, and adaptability to medium properties). Therefore, centrifugal pump is widely used in industrial production. Basic structure of Alfa Laval centrifugal pump:

Alfa Laval centrifugal pump consists of six parts: impeller, pump body, pump shaft, bearing, seal ring and stuffing box.

1. The impeller is the central part of the centrifugal pump. Its speed is high and its output is large. The blades on the impeller play a primary role. The impeller must pass the static balance test before assembly. The inner and outer surfaces of the impeller shall be lubricated to reduce the friction loss of water flow. According to its mechanical structure, it can be divided into closed type, semi closed type and open type. Closed impeller is suitable for transporting clean liquid; Semi closed and open impellers are suitable for transporting suspension containing solid particles, and the efficiency of such pumps is low.

2. The pump body, also known as the pump housing, is the main body of the water pump. It has the effect of supporting and fixing, and is connected with the bracket of the device bearing.

3. The effect of the pump shaft is to connect with the motor through the coupling, and transmit the torque of the motor to the impeller, so it is the primary component to transmit mechanical energy.

4. The sliding bearing uses transparent oil as lubricant, and oil is added to the oil level line. Too much oil will leak out along the pump shaft, too few bearings will overheat and burn out, causing trouble! During the operation of the water pump, the maximum temperature of the bearing is 85 ℃, and it is generally about 60 ℃.

5. The sealing ring is also called leakage reducing ring.

6. The stuffing box is mainly composed of packing, water seal ring, packing cylinder, packing gland and water seal pipe. The effect of the stuffing box is primarily to close the gap between the pump casing and the pump shaft, so as to prevent the water flow in the pump from flowing outside and prevent the outside air from entering the pump. Always adhere to the vacuum in the water pump! When heat is generated due to friction between the pump shaft and the packing, it is necessary to rely on the water seal pipe to hold the water in the water seal ring to cool the packing! Keep the pump running normally. Therefore, special attention should be paid to the check of stuffing box during the patrol inspection of pump operation!