What components are usually included in industrial water pumps
The water-passing part requires good hydraulic conditions. When the impeller is working, the flow rate increases gradually along the expanding section of the volute. In order to reduce the hydraulic loss, the water velocity flowing along the expanding section of the volute should be a constant in the pump design. After the water is discharged from the volute, it flows into the pressure water pipe through the conical diffuser pipe.
The pump casing is composed of several parts, and its inner cavity forms the impeller working chamber, suction chamber and pressure water chamber. The shape and size of the pump casing depends on the structure and size of the impeller and the shape and size of the water suction chamber and pressure water chamber determined by the hydraulic design. There are mainly two kinds of pump casings: end cover type pump casing and split type pump casing. The end cover type pump casing is divided along the radial plane perpendicular to the pump axis to form the pump body and pump cover. It is mostly used for single stage pump casing.
There are flange holes on the pump base for fixing with the bottom plate or foundation. There is a water discharge screw hole at the bottom of the pump casing, so as to empty the accumulated water when the water pump is stopped for maintenance. In addition, there is a drain screw hole at the bottom of the transverse groove of the pump base, so as to drain away the leaking water droplets flowing out of the stuffing box at any time.
Where the pump shaft passes through the pump cover, in order to prevent high-pressure water from flowing out through the rotating gap and air from flowing into the pump, a shaft sealing device must be installed. The shaft sealing device has a stuffing box seal and a mechanical seal.