Three screw pump flange and its drive motor should be based on a common installation foundation, foundation, flange or bearing must have sufficient rigidity to reduce vibration and noise generated gear pump operation. Motor and gear pump shall be connected with flexible coupling, concentricity less than 0.1 mm, the angle of inclination shall not be greater than 1 degree. Do not use hammer hammer when installing the coupling, so as to avoid damage to gear pump gear and other parts. If the pulley, sprocket and other drive support bracket should be set to prevent the driving gear bearing radial force. Tighten the gear pump, motor ground screw, the screw force should be uniform, reliable connection. Turn the coupling by hand, should feel the gear pump can easily rotate, there is no clamping and other anomalies, and then can be piping. High-viscosity gear pump suction pipe diameter should be large enough and to avoid narrow passage or sharp turn, reduce elbows, remove unnecessary valves, accessories, as far as possible to reduce the pump installation height, shorten the length of the suction pipe to reduce the pressure loss. Pipe joints and other components of the seal should be good to prevent air intrusion, thereby controlling the occurrence of cavitation and cavitation. Before starting the operation, fill the housing of the gear pump with liquid to be transported for safe start-up. If the ambient temperature is below the freezing point, preheat the pump with heat steam beforehand and then start the gear pump. Gear pump rotation direction with the inlet and outlet ports. If the first gear pump operation, or long-term idle after use, it is best to run at no-load or light load first about an hour. If abnormal temperature rise, leakage, vibration and noise are detected in advance during running-in, the machine should be shut down for inspection. 3G three screw pump selection, as much as possible to understand the conditions of the pump in detail, in addition to operating parameters, such as flow, pressure to be clear, the characteristics of the medium transported, such as media corrosive, gas content and solid particle size, Medium temperature, viscosity, weight, etc. should understand. Three screw pump in China's oil, chemical, metallurgy, shipbuilding and other industries are widely used, the pump in many areas instead of centrifugal pump and gear pump. 3G triple screw pump has a long service life, high efficiency, low energy consumption, low noise, and so on. The insulation screw pump standard by GB10887-89 design. Three screw pump itself consists of only three Screws, but there are a variety of structures, the general small flow, 0.2-6.5m3 / h pump body and bushing into a horizontal installation, shaft seal for the mechanical seal. Pump bushing above medium flow is fixed to the pump body as a separate part. Large flow pump made of double suction structure. Shaft according to the different media have a mechanical seal and packing seal two. The prime mover for marine pumps is AC marine motor.
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