As the main power equipment of LNG filling station, LNG submersible pump is mainly used for pressurization of liquefied natural gas in LNG filling stations, and the vehicle-mounted LNG Dewar is filled with liquefied natural gas through the LNG dispenser.
At present, the LNG submersible pump used in the gas station usually adopts the structure of two-stage, three-stage, four-stage/vertical, centrifugal pump, which has the characteristics of compact structure, light weight and reliable performance. The whole body is put into the pump pool, there is no dynamic seal, and the sealing reliability is high.
Submersible pump consists of a low-temperature submersible motor, a low-temperature bearing, a main shaft, an impeller, a guide vane, an inducer, and a casing. When the whole is immersed in a low temperature medium. The motor is a customized low temperature constant torque variable frequency motor. The material selection and processing technology of all parts of the submersible pump are carefully designed to fully ensure the compatibility and safety of the medium. The supporting pump pool is a vacuum insulation container. In order to ensure the normal operation of the submersible pump, it is generally equipped with a liquid inlet pipe, a liquid outlet pipe, a gas return pipe, a vent pipe, a residual liquid discharge pipe, a safety valve, a cable interface, a temperature sensor, a liquid Bit sensor and other interfaces.