A method for providing an axial gap in a cutter assembly of a grinder pump in order to secure an operative shearing action at a shearing interface in the cutter assembly. A grinder pump includes a cutter wheel connected to and driven in rotation by a drive shaft. The cutter wheel includes a set of cutting edges, and a cutter disc stationary connected to a pump housing and having a central hole and a set of cutting holes. The drive shaft and the cutter wheel are interconnected via the central hole of the cutter disc, wherein the cutter wheel and the cutter disc constitute the cutter assembly. A shim, which has a thickness equal to or greater than 0.05 millimeters and equal to or less than 0.15 millimeters and that is manufactured from degradable paper or plastic material, is clamped between the cutter wheel and the cutter disc.

A system for controlling the clearance distance between an impeller blade tip of a centrifugal compressor and a radially inner surface of an impeller shroud in a turbine engine. The system comprises a thermal driver coupled between the impeller shroud and engine casing by hinged linkages. The thermal driver includes an annular ring and annular seal which together define thermal driver cavity. Relatively warm or relatively cool air supplied to the thermal driver cavity cause expansion and contraction, respectively, of the annular ring which is translated by linkages into axially forward and aft motion, respectively.

A pump features a bearing sleeve couples to a pump shaft, and includes a bearing sleeve surface having bores for receiving fasteners; and an adjusting nut having a central bore with central bore threads to rotationally couple to pump shaft threads, is configured to rotate in relation to the bearing sleeve and move the pump shaft axially to adjust an impeller clearance between a working side of an impeller arranged on the pump shaft and a casing of the pump, and is configured with an adjusting nut surface having openings different in number than the bores, sets of corresponding bores and openings aligning at angular adjustment intervals, e.g. every 9 or 15?, when the adjusting nut is rotated in relation to the bearing sleeve in either direction in order to receive fasteners to couple the adjusting nut to the bearing sleeve when the adjustment of the impeller clearance is completed.

A system for controlling the clearance distance between an impeller blade tip of a centrifugal compressor and a radially inner surface of a segregated impeller shroud in a turbine engine. The system comprises a driving mechanism coupled to a portion of a segregated impeller shroud. The driving mechanism comprises a driving arm and threaded axial member configured to translate motion of an actuator ring into axially forward and aft motion of the portion of the segregated impeller shroud.

An electric submersible pump (ESP) can include a shaft; an electric motor configured to rotatably drive the shaft; a housing; a stack of diffusers disposed in the housing; impellers disposed in the housing and operatively coupled to the shaft; and a proximity sensor operatively coupled to the housing.

A compressor includes a casing having an upper half casing and a lower half casing and a tubular shape with both ends open, a bundle including annular heads respectively fixed on both sides in an axial direction with respect to a plurality of diaphragms and closing openings of the casing, a communication clearance seal portion sealing a communication clearance extending in the axial direction between the outer peripheral surface of the diaphragm and the inner peripheral surface of the casing such that a suction opening and a discharge opening communicate with each other, and a regulating portion regulating the position of the head in the axial direction with respect to the casing.

A system for controlling the clearance distance between an impeller blade tip of a centrifugal compressor and a radially inner surface of an impeller shroud in a turbine engine. The system comprises a thermal driver coupled between the impeller shroud and engine casing by hinged linkages. The thermal driver includes an annular ring and annular seal which together define thermal driver cavity. Relatively warm or relatively cool air supplied to the thermal driver cavity cause expansion and contraction, respectively, of the annular ring which is translated by linkages into axially forward and aft motion, respectively.

A method for the positioning of a cover disk with respect to an open impeller of a pump arranged in a pump housing. An adjustment bolt is first screwed so far into a threaded bore of the cover disk until it comes into contact with the pump housing. An identifier is subsequently applied which indicates a position of a first marking of the adjustment bolt. The adjustment bolt is then screwed in further until a second marking reaches the identifier. The described steps are repeated for at least one further adjustment bolt.

A fluid circulating assembly having a rotation axis is provided. The fluid circulating assembly includes a fan impeller including an inlet ring and a rear plate that together define a central fan chamber. The fluid circulating assembly also includes an electrical machine having a rotor assembly, a stator assembly, and at least one bearing assembly. The rotor assembly is coupled to the rear plate such that the electrical machine is located entirely outside the central fan chamber. The rotor assembly includes a hub portion having a radially inner wall that at least partially defines a central opening extending entirely through the electrical machine and oriented about the rotation axis such that the central opening does not include a shaft extending therethrough.

The present disclosure describes a system and method for varying pressure from a pressure generator without pressure generator motor speed variations. The system comprises a pressure generator housing, a centrifugal compressor housed within the housing, and at least one impeller blade. The centrifugal compressor is configured to generate a pressurized flow of gas. The pressure generator system includes a pressure adjustment body (e.g., a plate) that is movably attached to and/or within the housing, and an actuator configured to displace the pressure adjustment body with respect to the housing, such that displacement of the pressure adjustment body is configured to regulate pressure of the generated gas flow by varying a gap between the impeller blade and a surface of the pressure adjustment body.