The working principle of centrifugal pump
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HENAN WEIN INDUSTRY CO., LTD. Tel: 0086-371-65807516 Fax：0086-371- 65807519 www.petroleum-drilling.com E-mail: [email protected] Brief introduction about classification of centrifugal pump 1. Classify by quantity of impeller # single-stage pump: only one impeller in the pump shaft. # Multi-stage pump: two or more than two of the impeller in the pump shaft, now the head of delivery is the total head delivery of all impeller. 2. Classify by the working pressure # low pressure pump: the pressure is less than 100 m water column; # medium pressure pump: pressure between 100~650 m water column; # high-pressure pump: pressure is higher than 650 m water column. 3. Classify by impeller inlet # unilateral water pump: this pump also called by single suction pump, there is only one inlet in the impeller. # double inlet type pump: this pump also called by double suction pump, there is water inlet in both sides of the impeller. Its flow is twice as big as single suction pump, can be approximated as two single suction impeller back to back together. 4.Classify by pump casing joints # horizontal plane through the axis line. # vertical combination pump 5. Classify by shaft position # horizontal pump: pump shaft is positioned in the horizontal position. # vertical pump: the pump shaft in a vertical position. 6. Classify by type of water to the chamber # Volute pump: water from the impeller directly into the pump shell which is spiral shape. # guide vane pump: water from the impeller, guide vane is arranged outside into it, after entering the next level or into the outlet pipe
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Centrifugal pumps generally driven by the motor, before starting the pump, the pump and the suction pipe is filled with liquid. When the impeller rotates at high speed, the impeller drive a rotation of the liquid between the blades, due to centrifugal force, the liquid thrown from the center of the impeller outer edge of the impeller (flow rate can be increased to 15 ~ 25m / s), the kinetic energy increases. When the liquid into the pump casing, due to the volute pump casing gradually expanded in the flow path, the liquid flow gradually decreased, some kinetic energy into static pressure, then a high pressure fluid to flow along the discharge outlet. At the same time, the impeller, the liquid is thrown at the center to form a vacuum, and the surface pressure at the point Pa is higher than the center of the impeller, therefore, the suction pipe pressure under the action of the liquid into the pump. Constantly rotating impeller, the liquid is sucked and a continuous extrudate. Because centrifugal pumps have been able to transport liquids, mainly by centrifugal force, it is called centrifugal pump. http://www.petroleum-drilling.com/drilling-fluid-solid-control-equipment/jsb10.html
Transcript of The working principle of centrifugal pump
HENAN WEIN INDUSTRY CO., LTD. Tel: 0086-371-65807516 Fax：0086-371- 65807519 www.petroleum-drilling.com E-mail: [email protected]
Brief introduction about classification of centrifugal pump 1. Classify by quantity of impeller # single-stage pump: only one impeller in the pump shaft. # Multi-stage pump: two or more than two of the impeller in the pump shaft, now the head
of delivery is the total head delivery of all impeller. 2. Classify by the working pressure # low pressure pump: the pressure is less than 100 m water column; # medium pressure pump: pressure between 100~650 m water column; # high-pressure pump: pressure is higher than 650 m water column. 3. Classify by impeller inlet # unilateral water pump: this pump also called by single suction pump, there is only one inlet in the impeller. # double inlet type pump: this pump
also called by double suction pump, there is water inlet in both sides of the impeller. Its flow is twice as big as single suction pump, can be approximated as two single suction impeller back to back together.
4.Classify by pump casing joints # horizontal plane through the axis line. # vertical combination pump 5. Classify by shaft position # horizontal pump: pump shaft is positioned in the horizontal position. # vertical pump: the pump shaft in a vertical position. 6. Classify by type of water to the chamber # Volute pump: water from the impeller directly into the pump shell which is spiral shape. # guide vane pump: water from the impeller, guide vane is arranged outside into it, after
entering the next level or into the outlet pipe
