Inlet flow channel and wet pit, dry pit installation :
Axial flow pump (especially large pump) very strict requirements on the type and size of the inlet conduit, it directly affects the performance of the pump (such as pump efficiency, cavitation performance, etc.) it is necessary through formal design (Design Institute).
Wet pit installation, refers to all or part of the pump is submerged in fluid pumped, pump partially immersed in water inhalation;
Dry pit installation, the system refers to the pump all surrounded by air, the elbow shaped suction flow into the pump.
Pump mounting base and discharge outlet position:
Double deck foundation installation: the pump is installed on the base, the motor is mounted on the motor base (on the basis). Pump axial force from the motor bearing bearing, pump run time based on the load:
Under the pressure of the foundation = pump shell body weight + pump water weight - pump axial water thrust
Motor base force = motor weight + pump rotor heavy + pump axial water thrust
Single layer foundation installation: pump and motor constitute an integral direct connection structure, installed on the basis of motor, pump shaft and motor shaft using rigid coupling connection, pump run time based on the load:
Motor Foundation (single layer foundation) stress = pump shell body weight + pump rotor weight + motor + pump casing water weight.
The double base discharge pipe is arranged between the two base, and the single layer foundation can be arranged on the basis of the requirement.
Rotor can draw out type structure :
Usually the rotor and pump body as "the whole" combined structure, maintenance of the whole pump must be removed, in order to facilitate the maintenance of the rotor can be drawn out. The rotor component (including guide vane), from the pump cylinder and discharge elbow out, not only to avoid the demolition of a discharge line, and reduce the weight lifting.
Pump guide bearing lubrication and pump shaft protection :
Delivery of water at room temperature, water lubricated rubber bearings, lubrication medium available transportation, pump shaft without protection device in the transport of water containing sand (such as Yellow River) or corrosive medium (such as water), shaft and the guide bearing, the supporting tube (sets) protection, and make the dielectric isolation, external for water lubrication.
