A turbomachinery according to an embodiment includes an impeller including at least one blade, and a casing for housing the impeller rotatably. A size of a gap between a tip of the blade and an inner surface of the casing during a stop of the impeller is formed non-uniformly over a circumferential direction of the impeller.

The centrifugal compressor can have a shroud engaged to a case via a plurality of circumferentially interspaced slots and lugs, the slots extending in at least one of a radial direction and an axial direction relative to a rotation axis of the compressor, the lugs slidingly received in a corresponding slot and configured for sliding in the slot in response to thermal growth of the case relative to the shroud.

A seal, for use with pump casing elements that are adjustable relative to each other, includes an annular band and a resilient annular flange oriented at a non-perpendicular angle to a first surface of the annular band such that the seal, in use, is able to provide greater adjustment between the adjustable pump elements while maintaining a reliable seal between the pump elements.

A compressor shroud assembly is disclosed comprising a dynamically moveable impeller shroud, a static compressor casing, an air piston mounted between said impeller shroud and said compressor casing, and a clearance control system. The air piston effects axial movement of said impeller shroud responsive to a supply of actuating air. The clearance control system regulates the pressure of actuating air in said air piston and comprises a supply conduit having a supply modulating valve and a discharge conduit having a blowoff check valve. The blowoff check valve is set to open at a predetermined differential pressure between pressure of the air piston and pressure of the supply of actuating air.

Provided is a turbo compressor. The turbo compressor includes a driving shaft, a first impeller, a second impeller, a first shroud, a second shroud, a first-stage outflow passage, and a second-stage outflow passage. Also, the turbo compressor includes a gap adjustment passage that is branched from at least one of the first-stage outflow passage or the second-stage outflow passage to extend to the first shroud.

An embodiment of the present disclosure discloses a motor assembly including a rotation shaft, an impeller including a hub fastened to the rotation shaft, and a plurality of blades protruding outward from an outer surface of the hub, an inlet body for surrounding an outer circumference of the impeller, and a coating layer coated on an inner surface of the inlet body, wherein at least a portion of the coating layer is ground in a form of powder by friction with the plurality of blades during rotation of the impeller.

A bearing device, a compressor and a method, in which a first radial bearing element is measured in at least the radial direction, an axial distance of the first axial bearing element from the first radial bearing element being measured, the second radial bearing element being measured in at least the radial direction, the first radial bearing element being positioned with respect to the second radial bearing element as a function of the predefined first width of the radial gap, the adjustment arrangement being situated in such a way that the axial gap has the predefined second width.

In centrifugal pumps and, in particular, pumps for transferring fluids containing abrasive particles such as slurry pumps, wear of wetted areas is a major maintenance issue. The invention provides for the protection of internal surfaces vulnerable to wear from such particles by providing means for adjusting and controlling distribution of gland fluid for flushing vulnerable areas. The invention extends to a method and a retrofit kit, but provides primarily for a centrifugal pump assembly comprising an impeller rotatably mounted therein and support means operatively arranged for supporting the impeller from its suction side in sealing relationship with the housing. The sealing means may be mechanically adjustable for substantially even distribution of gland fluid to both axial sides of the impeller in the pump housing.

A side channel compressor for compressing a gas includes a housing and at least one impeller arranged in the housing and configured to be driven in rotation about a central axis. In addition, the side channel compressor includes at least one seal assembly arranged in the housing and including at least one sealing device configured to seal at least one gap between the housing and the at least one impeller and be forced radially outward with respect to the central axis in order to keep the at least one gap small. The at least one seal assembly also includes at least one sealing-device-holding device configured to hold the at least one sealing device in an axially secured fashion with respect to the central axis and which includes at least one main holding body.

A magnetically driven centrifugal pump has a pump case, an open vane impeller in the pump case, a stuffing box including a stuffing box outer being fixed relative to the pump case and a stuffing box inner threadedly engaged with the stuffing box outer, and a rotor axially fixed and rotatably mounted in the stuffing box inner. Bushings are arranged between the rotor and the stuffing box inner. A drive is fixed relative to the pump case and includes a drive output extending into the rotor. There is a magnetic coupling between the rotor and the drive and a canister fixed to the stuffing box and extending through the magnetic coupling to isolate the rotor from the drive. A rub ring closes the end of the stuffing box inner and constrains the drive output from damaging the cannister under catastrophic bearing failure.