WQ and WQD sewage submersible electric pump is composed of water pump, seal and motor. The motor is located on the upper part of the pump and is single-phase or three-phase asynchronous motor. The pump is located at the lower part of the electric pump, which is a double-channel impeller and volute structure. The rigid mechanical seal is used between the pump and the motor, and the o-shaped oil-resistant rubber seal ring is used at each fixed end for static seal.
The electric pump shaft is plated with hard chromium, which can effectively improve the wear resistance and corrosion resistance of the shaft, as well as facilitate the maintenance and disassembly of impeller;
Reliable cable waterproof inlet water will not enter the motor even if the cable is damaged or the cable head is immersed in water. Not because of the environment moisture, moisture through the cable copper wire gap suction motor, resulting in insulation drop;
11KW and below for the direct start of the pump, the pump is equipped with a thermal protector, can be in the pump phase, overload, motor overheating and other circumstances to cut off power protection motor; 15KW and above electric pump to meet the star delta starting mode. The coil of the electric pump is embedded with a heat-sensitive switch, which can be connected to an external motor protection device. 18.5kw and above pump can be equipped with sealing leakage probe according to user needs;
The insulation grade of the motor is class B, the designed output power has sufficient margin, and the whole series of electric pumps can operate at full head.