Pump and fan - displacement

Pump and fan is to use plus can denier conveying fluid fluid machinery. They are widely used in gas and heating and ventilation. According to the working principle of pump and fan, usually they electrical motor can be classified asynchronous motor as follows: Positive displacement pump and fan in operation, the mechanical work within the volume change constantly, and motor run capacitor suction or discharge fluid. According to its different structures, and can be divided into; 1. Reciprocating: this machine through the piston within the cylinder of the reciprocating function make the cylinder contents changed repeatedly, with suction and discharge fluid, such as piston pump, piston pump), etc.; 2. Rotary: chassis within the rotor rotates, or rotating parts working volume change between rotor acmotortrading.blogspot.com and housing, so as to the suction and discharge fluid, such as gear pump, gear pump), screw pump, screw pump), etc.