Abstract: A centrifugal pump, and components thereof, operable at high speeds, is described under the present disclosure. A hard polymer sleeve can be applied to certain surfaces of a seal casing within the pump. If the sleeve is applied along surfaces near the center shaft, then the hard polymer will withstand the forces and pressures of the system. The hard polymer might not be used along the outer diameter, farther from the shaft, because velocities are higher the further out one goes. The current disclosure allows for the use of fluoropolymer in the lining sleeve. The benefits of fluoropolymer have been unavailable in high speed centrifugal pumps because the forces are too great on the periphery of the seal casing. However, the lower speeds along the interior, near the shaft, allow fluoropolymer to be used.

Abstract: An oil cooling system for a motorized pump is described. The motorized pump includes an oil sump and oil flow path, the oil sump and oil flow path containing oil to lubricate and remove heat from a bearing assembly and drive shaft. A motor coupling housing attached to a bearing box holding the bearing assembly includes an interior space that houses an oil cooling system. The oil cooling system includes a finned cooling tube connected to an outlet of an oil flow path in the bearing box. A fan is connected to the drive shaft of the motorized pump, and is situated to force air over the cooling tube and plurality of fins such that hot oil received by the cooling system is cooled and the cooled oil is returned to the oil flow path in the bearing box.

Abstract: An oil cooling system for a motorized pump is described. The motorized pump includes an oil sump and oil flow path, the oil sump and oil flow path containing oil to lubricate and remove heat from a bearing assembly and drive shaft. A motor coupling housing attached to a bearing box holding the bearing assembly includes an interior space that houses an oil cooling system. The oil cooling system includes a finned cooling tube connected to an outlet of an oil flow path in the bearing box. A fan is connected to the drive shaft of the motorized pump, and is situated to force air over the cooling tube and plurality of fins such that hot oil received by the cooling system is cooled and the cooled oil is returned to the oil flow path in the bearing box.

Abstract: A low-cavitation impeller for a centrifugal pump is provided. The impeller provides a smooth flow path from the inducer section through to the outlet section. Continuous main blades run from a leading edge at the inlet eye to a trailing edge at the impeller outlet, and continuous secondary blades run from a leading edge in the transition region to a trailing edge at the impeller outlet.

Abstract: A centrifugal pump, and components thereof, operable at high speeds, is described under the present disclosure. A hard polymer sleeve can be applied to certain surfaces of a seal casing within the pump. If the sleeve is applied along surfaces near the center shaft, then the hard polymer will withstand the forces and pressures of the system. The hard polymer might not be used along the outer diameter, farther from the shaft, because velocities are higher the further out one goes. The current disclosure allows for the use of fluoropolymer in the lining sleeve. The benefits of fluoropolymer have been unavailable in high speed centrifugal pumps because the forces are too great on the periphery of the seal casing. However, the lower speeds along the interior, near the shaft, allow fluoropolymer to be used.

Abstract: An inner drive for a magnetic drive pump includes a magnet supported on a yoke. The inner drive is driven about an axis to pump a corrosive process fluid. The magnet and yoke are fully encapsulated during the molding process to completely surround the magnet and yoke in a protective plastic shell. A sleeve is arranged radially outwardly of the magnet to provide further protection. Backing rings are arranged on either side of the magnet. A bonding material joins the plastic shell to the backing rings and sleeve to prevent a space from forming beneath the plastic shell that would become filled with the process fluid once it has permeated the plastic shell. A protective coating is arranged on at least a portion of the magnet to further insulate the magnet from the process fluid.

Abstract: An impeller for a centrifugal pump includes a radially inner hub, and a plurality of blades extending straight and along a direction that is perpendicular to a rotational axis of the impeller. The blades extend from a radially outer end to a radially inner end, and define a generally frusto-conical envelope. A flow control feature is formed between the radially inner end of the blades and the hub. The flow control feature has a curved upper surface.

Abstract: A seal assembly for use in a gearbox has a rotating ring to be secured to a shaft, and having a contact face. The contact face abuts a stationary seal. The stationary seal has a retainer with a channel extending to a bottom. A floating seal portion is positioned within the retainer, with a spring positioned inward of an inner end of the floating seal portion, and biasing the floating seal portion outwardly. There is an inner bore of the retainer which is spaced from an outer periphery of the floating seal portion. One of the inner bore and the outer periphery presides with the plurality of radially located pins. The other of the inner bore and the outer periphery is formed with the plurality of recesses. The pins are received in the recesses, to prevent rotation of the floating seal portion within the retainer.

Abstract: A flow outlet for a pump includes a pocket section which defines a pocket section diameter. A throat section downstream of the pocket section, the throat section defines a throat section diameter less than the pocket section diameter.