In an electrical coolant pump, preferably for use as an additional water pump in a vehicle, a radial bearing of the shaft is provided by means of a radial slide bearing lubricated with coolant on the separating element which is disposed between the pump impeller and the rotor. A dry-running electric motor has a radially inner stator and a radially outer rotor is accommodated within the motor chamber. A shaft seal is disposed between the radial slide bearing and the motor chamber. The rotor is formed in a cup shape, the inner surface of which faces the shaft seal and is fixed to the shaft in an axially overlapping manner. The motor chamber has an opening to the atmosphere which is closed by a liquid-tight and vapor-permeable pressure equalizing membrane. The separating element is configured as a support flange with a separating portion and an axial projection into the motor chamber, to which the stator is attached. The control unit is disposed between the separating element and the stator in the axial direction.

In an exemplary embodiment, a seal device 10 that seals between a housing 11 and a rotation shaft 20 passing through the housing 11 includes a floating ring 15 arranged with a gap h with respect to the rotation shaft 20, wherein the floating ring 15 includes at least one supporting means 18 that supports in the circumferential direction. In the seal device, the floating ring follows movement of the rotation shaft even upon running for a long time, a clearance between the rotation shaft and the seal ring can be properly held, and the sealing operation by the floating ring and the vibration damping function can be exerted, and the seal device is easily assembled.

The approach presented here concerns a pump for delivering a fluid. The pump comprises an impeller, a drive device with a shaft, a shaft housing and a sealing device. The impeller is shaped to deliver the fluid. The drive device with the shaft is designed to drive the impeller. The shaft housing is shaped to receive the shaft and/or the drive device. The sealing device comprises at least one casing sealing element and/or an impeller sealing element which is received between the drive device and the impeller and which is designed to prevent fluid from entering the drive device and/or the shaft casing during operation of the pump.

An improved pump and sealing assembly having particular utility to vertically extending pumps/pump shafts provides an arrangement that enables field repair as opposed to requiring travel of the host vessel to a shipyard. The apparatus includes an adapter housing that is configured to provide easy access to set screws that enable field disassembly. This adapter housing carries a sleeve and a bearing. The adapter housing can be fitted to a pump seal assembly that can include a mechanical seal and under bearing assembly.

A water pump includes a support portion provided with a bearing hole, and a pulley which is provided at one end of a rotation shaft and which is formed in a cylindrical shape with a bottom. The support portion includes an annular small-diameter portion provided with the bearing hole at the center, and an annular large-diameter portion. At least a part of the small-diameter portion is located at the pulley side relative to the large-diameter portion. An annular first clearance is formed between the cylindrical portion of the pulley and the large-diameter portion. A second cylindrical portion is provided on the bottom portion of the pulley. An annular second clearance is formed between the second cylindrical portion and the small-diameter portion.

A hydraulic ram used for maintaining pressure on pump packing. A pump packing closure mechanism is sized to extend around a shaft of a pump, and to close a space between the shaft of the pump and a housing. The closure mechanism presses against packing rings that surround the shaft of the pump. A hydraulic ram presses the closure mechanism against the packing rings.

A downhole electric submersible pump (ESP) assembly. The downhole ESP assembly comprises a permanent magnet motor (PMM) comprising a first drive shaft, a stator, and a rotor disposed within the stator and comprising a core coupled to the first drive shaft, wherein the core retains a first permanent magnet element within a first magnet pocket defined by the core that extends axially parallel to the first drive shaft and retains a second permanent magnet element within a second magnet pocket defined by the core that extends axially parallel to the first drive shaft; a seal section having a second drive shaft coupled to the first drive shaft; and a pump assembly having a third drive shaft coupled to the second drive shaft.

A sliding bearing having a sealing arrangement for water pumps, configured to radially mount and seal a shaft in a housing between a wet side and a dry side. The sliding bearing and the sealing arrangement include a sliding bearing bushing made of a sintering material for radial mounting of the shaft, and a dry-side shaft seal arranged between the sliding bearing bushing and the dry side. A wet-side shaft seal is arranged between the wet side and the sliding bearing bushing and a lubricant reservoir with a substrate, made of a non-sintered material, which is porous in at least some sections, is arranged at least between the wet-side shaft seal and the sliding bearing bushing. The lubricant reservoir includes, in pores of the substrate, a lubricant insoluble in water. A volume of the lubricant reservoir and a volume of a lubricant filling take up a total volume of spaces between the wet-side shaft seal and the dry-side shaft seal.

A device is disclosed including a wear ring formed as a hollow cylinder with an inside diameter and an outside diameter. The hollow cylinder may have multiple holes through at least a portion of the wear ring from the inside diameter towards the outside diameter. The multiple holes may be passages between the inside diameter and the outside diameter that allow fluid under pressure to pass between the inside diameter and the outside diameter through the multiple holes.

A bearing packing according to the invention includes a first packing having an opening portion formed therein, the opening portion allowing a rotary shaft to penetrate through the first packing, and a second packing having an opening portion formed therein, the opening portion allowing the rotary shaft to penetrate through the second packing, and configured to be brought into engagement with the first packing in a direction of the rotary shaft, and a sealed space for sealing a hydrophobic fluid in is defined around a circumference of the rotary shaft that is surrounded by the first packing and the second packing.