Centrifugal pump is used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow in the drilling mud solids control system. The rotational energy typically comes from an engine or electric motor. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser revolute chamber (casing), from where it exits. Seeing from the function of centrifugal pump, it is an essential solids control equipment.
Centrifugal Pump
Vertical centrifugal pumps are also referred to as cantilever pumps. They utilize a unique shaft and bearing support configuration that allows the volute to hang in the sump while the bearings are outside of the sump. This style of pump uses no stuffing box to seal the shaft but instead utilizes a "throttle Bushing". A common application for this style of pump is in a parts washer.
During the process of using centrifugal pump, we should pay attention to the following:
① prohibited no water running, do not adjust suction inlet to reduce emissions, prohibited operating under low flow,
② monitoring operating process, completely prevent stuffing box leakage, when replacing the packing box should use new packing,
③ ensure mechanical seal with fully flush flow, water-cooled bearing forbids the use of excessive flow,
④ lubricant don't use too much,
⑤ Check according to recommended cycle. Establish operating records, including operating hours, packing adjustment and replacement, adding lubricant and other maintenance measures and time. For centrifugal pump suction and discharge pressure, flow rate, input power, lotions and bearing temperature and vibration condition should be regularly measurement records.
⑥ centrifugal pump host depends on atmospheric pressure pumps lower water to the higher, and atmospheric pressure only supports approximately 10.3 m water column, so when the centrifugal pump host leave the water 12 meters, then it cannot work.
Besides, It can be used as feeding pump for desander, desilter or used as mixing pump for jet mud mixer. Also it can be used as trip pump, and supercharging pump for rig mud pump.
