A fluid machine includes a bladed wheel, a resolver, a first fastener, and a second fastener. A resolver rotor is held between the first fastener and the rotary shaft and fixed to a large-diameter portion of the rotary shaft. The bladed wheel is held between the second fastener and the rotary shaft and fixed to a small-diameter portion of the rotary shaft. While the resolver rotor is fixed by the first fastener in a same direction as the bladed wheel is fixed by the second fastener along an axial direction of the rotary shaft, and the resolver rotor is fixed by the first fastener at a position away in a radial direction of the rotary shaft from a position where the bladed wheel is fixed by the second fastener so that the resolver rotor does not receive an axial force from the second fastener.

A cartridge seal is provided for sealing a shaft (4) with respect to a housing (2) and is intended to be a slide ring seal arrangement (12) for a centrifugal pump. The cartridge seal includes a shaft protection sleeve which is rotationally connected to the shaft (4) by a retaining ring, a support (24) for incorporating the cartridge seal into a housing opening of the pump housing (2), a slide ring which is rotationally connected to the shaft protection sleeve and a counter slide ring which is rotationally connected to the support (24), as well as an enclosed space (30) within the sealing arrangement. The space (30) is fluidically connected to a sealing gap formed between the slide ring and the counter slide ring, and is at least partially prefilled with liquid in order to prevent dry running when the pump is operated for the first time.

A cartridge seal is provided for sealing a shaft (4) with respect to a housing (2) and is intended to be a slide ring seal arrangement (12) for a centrifugal pump. The cartridge seal includes a shaft protection sleeve which is rotationally connected to the shaft (4) by a retaining ring, a support (24) for incorporating the cartridge seal into a housing opening of the pump housing (2), a slide ring which is rotationally connected to the shaft protection sleeve and a counter slide ring which is rotationally connected to the support (24), as well as an enclosed space (30) within the sealing arrangement. The space (30) is fluidically connected to a sealing gap formed between the slide ring and the counter slide ring, and is at least partially prefilled with liquid in order to prevent dry running when the pump is operated for the first time.

A washing machine appliance and pumps therefore are provided. In one example aspect, a drain pump for a washing machine appliance includes features for improving pump performance and sand and debris management. The drain pump includes a pump housing and a pump body defining a pump chamber in which an impeller having a disk and blades is rotatably mounted. The pump body has a base defining a pump body recess. An outer rim of the base defines an outer periphery of the pump body recess. The disk is spaced from the outer rim so that sand and debris can be flushed from beneath the impeller. A sloped surface of the outer rim also facilitates removal of sand and debris from beneath the impeller. A labyrinth is defined beneath blades of the impeller to prevent sand and debris from entering an area between a seal and a shaft of the impeller.

A seal assembly includes a housing at least partially defining a seal opening and at least partially surrounding a rotatable shaft. A carbon seal is located at least partially in the seal opening and includes a sealing surface. The rotatable shaft includes a radially facing surface that has a carbide based coating and a diamond-like carbon coating in engagement with the sealing surface on the carbon seal.

A seal assembly includes a housing at least partially defining a seal opening and at least partially surrounding a rotatable shaft. A carbon seal is located at least partially in the seal opening and includes a sealing surface. The rotatable shaft includes a radially facing surface that has a carbide based coating and a diamond-like carbon coating in engagement with the sealing surface on the carbon seal.

A turbine housing for a two-wheel air cycle machine includes a first side of the turbine housing, a second side of the turbine housing, a central axis, an outer housing portion, an inner housing portion, a plurality of struts between the inner housing portion and the outer housing portion and a plurality of cooling slots between the plurality of supports. The outer housing portion includes an inner surface, an outer surface, a cooling inlet extending from the outer surface of the outer housing portion and a cooling outlet opposite the cooling inlet and extending from the outer surface of the outer housing portion. The inner housing portion includes a thrust bearing support surface substantially parallel to the second side of the turbine housing and a journal bearing bore extending between the first side of the turbine housing and the thrust bearing support surface.

A fluid diverter that utilizes a gland seal. The gland seal includes a stationary seat, a first O-ring, a rotating seal face, a second O-ring, a plurality of tabs, and a spring retainer. The fluid diverter may also include a one-piece bearing isolator. The one-piece bearing isolator includes a stator having a first end, a first set of O-rings, a second set of O-rings, and a second end. The one-piece bearing isolator also includes a rotor seated in the stator, the rotor including a recess, an O-ring positioned in the recess, and a lip extending over and hugging the stator. The fluid leak diverter utilizes the gland seal and one-piece bearing isolator to direct leaked liquid fluid away from a pump (and functional components of the pump such as bearings).

A fluid diverter that utilizes a gland seal. The gland seal includes a stationary seat, a first O-ring, a rotating seal face, a second O-ring, a plurality of tabs, and a spring retainer. The fluid diverter may also include a one-piece bearing isolator. The one-piece bearing isolator includes a stator having a first end, a first set of O-rings, a second set of O-rings, and a second end. The one-piece bearing isolator also includes a rotor seated in the stator, the rotor including a recess, an O-ring positioned in the recess, and a lip extending over and hugging the stator. The fluid leak diverter utilizes the gland seal and one-piece bearing isolator to direct leaked liquid fluid away from a pump (and functional components of the pump such as bearings).

A pump system for pressurizing a fluid within a closed loop supercritical transport bus is disclosed herein. The examples of the pump system disclosed herein include an impeller coupled to an impeller shaft; an axial flux electric motor including rotors and a stator; a rotor shaft connected to the rotors, wherein the rotor shaft is coupled to the impeller shaft; a seal to prevent the fluid from contacting the axial flux electric motor; a first housing to frame the impeller shaft; and a second housing to frame the axial flux electric motor, wherein the second housing is separate from the first housing.