axial thrust in multistage centrifugal pump|centrifugal pump axial thrust

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Dec 1, 2022 - In this research, the deep-sea mining pump’s axial thrust and hydraulic forces were investigated to understand the challenges and dynamics involved in operating multistage centrifugal pumps in demanding environments. Axial thrust in multistage centrifugal pumps is a critical factor that can impact the performance and longevity of the equipment.

In this paper, axial thrust problems of multistage pumps are presented. The entire investigation has been focused on the pump design concept having all impellers in series (facing in one direction) and is valid for barrel casing type as well as for segmental type.

Axial Thrust in Multistage Pump

Axial thrust in multistage pumps refers to the force exerted along the axis of the pump rotor. In multistage centrifugal pumps, which consist of multiple impellers stacked in series, the axial thrust generated by each impeller adds up to create a significant total axial thrust. This axial thrust must be carefully managed to prevent excessive wear and tear on the pump components.

Centrifugal Pump Axial Thrust

Centrifugal pump axial thrust is primarily caused by the pressure difference between the inlet and outlet of the pump. As the fluid is accelerated by the impeller and directed towards the outlet, a reaction force in the opposite direction is generated, resulting in axial thrust. In multistage centrifugal pumps, this axial thrust can be amplified due to the presence of multiple impellers.

Multistage Centrifugal Pump Hydraulic Thrust

Hydraulic thrust in multistage centrifugal pumps is the force exerted on the impeller due to the hydraulic pressure of the fluid being pumped. This hydraulic thrust, combined with the axial thrust, determines the total thrust experienced by the pump. Proper hydraulic design and impeller balancing are essential to minimize hydraulic thrust and ensure smooth operation of the pump.

Axial Thrust of Pumps

Axial thrust of pumps is a common issue in centrifugal pumps, especially in multistage configurations. Excessive axial thrust can lead to increased vibration, reduced efficiency, and premature failure of pump bearings and seals. Engineers must carefully calculate and manage axial thrust to optimize pump performance and reliability.

Axial Thrust of Lifting Pump

In lifting pumps, which are designed to raise fluids from lower to higher elevations, axial thrust plays a crucial role in maintaining the pump's stability and efficiency. The design of the impeller and casing must account for the axial thrust generated during operation to prevent issues such as shaft deflection and mechanical failures.

Hydraulic Axial Thrust Pump

Hydraulic axial thrust in pumps is the result of the hydraulic forces acting on the impeller. Proper hydraulic design, including the selection of impeller size and shape, is essential to minimize axial thrust and ensure optimal pump performance. Hydraulic axial thrust must be balanced with mechanical considerations to achieve reliable and efficient pump operation.

Multi-Stage Centrifugal Pump

Multi-stage centrifugal pumps are commonly used in applications that require high pressure or head. These pumps consist of multiple impellers arranged in series, with each impeller contributing to the overall pressure boost. Managing axial thrust in multi-stage centrifugal pumps is crucial to maintaining performance and extending the service life of the equipment.

An experimental and theoretical study is performed with a single stage pump. …

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axial thrust in multistage centrifugal pump|centrifugal pump axial thrust