Common centrifugal pump drive is through the coupling of the pump impeller shaft and the electric shaft connected to the impeller and the motor together to rotate work, and the shield pump is a non-sealed pump, pump and drive motor are sealed in a Pumped medium filled pressure vessel, the pressure vessel is only static seal, and by a wire group to provide a rotating magnetic field and drive the rotor. This kind of structure has canceled the rotary shaft sealing device that the traditional centrifugal pump has, therefore can be completely leakless. Shield pump to pump and motor together, the motor rotor and pump impeller fixed on the same axis, the shield sleeve motor will be separated from the stator and rotor, the rotor is transported medium, the power through the stator field Pass to the rotor. In addition, the shield pump manufacturing is not complicated, the hydraulic end of the centrifugal pump can be used in accordance with the structure type and the relevant standard specifications to design and manufacture. Features: 1, the motor and pump integrated structure, all static seal, the pump is completely leak-free; 2, closed, no leakage of toxic and hazardous substances can be transported liquid; 3, using shielded water-cooled motor and the abolition of cooling Fan makes the pump quiet operation of low noise, suitable for high ambient noise requirements of the occasion; 4, the use of transport medium lubrication of graphite sliding bearings, lower operating noise and without manual refueling, reducing maintenance costs; In recent years, the bearing material Also added silicon carbide SIC, superhard, etc., better life than graphite bearings. 5, the vertical structure can be installed on the pipe like a valve, easy and quick installation, and maintenance only when the motor and impeller can be extracted without removing the pipe. 6, can be installed with shock absorbers or shock absorbers to run, so that pump noise in operation is lower. Use range: 1, the basic type of conveying ordinary materials; 2, conveying reverse-circulation and vaporization of materials and reverse pressure type; 3, conveying high-temperature materials, high temperature separation type, the temperature is usually below 350 degrees; 4, 5, conveying high melting point material of high melting point type; 6, conveying material level is lower than the self-absorption type of pump inlet, self-absorption height should be less than 5 meters. A civil use; 1, ground source heat pump air conditioning circulating water system; 2, lithium bromide air conditioning unit air-conditioning pumps, transformer pumps, locomotive pumps; 3, heating heating circulating water system; 4, fire water booster system; Booster system. Second, industrial and military aerospace 1, chemical and pharmaceutical industries with toxic and hazardous liquid transport; 2, space rocket launch fuel before refueling; 3, nuclear power plants with nuclear-screened electric pump.
