An all-metal conical combined screw pump suitable for petroleum field includes: a stator, a rotor, a sleeve and a sucker rod, wherein the internal threaded curved surface and the external threaded curved surface are both tapered The spiral structure and the taper are the same; the all-metal conical combined screw pump further comprises a movable part, a fixed part and a elastic part, the movable part is fixedly connected to the rotor, the fixed part is fixedly connected to the sucker rod, one end of the elastic member abuts against the movable part or the rotor, and the other end abuts against the fixed part or the sucker rod, the elastic member can Elastic contraction or elastic expansion along the sliding direction of the movable part.

Provided are: a displacement expanding apparatus, which uses environmentally friendly electrical energy to generate rotational power; and an engine including the displacement expanding apparatus, the novel engine having improved performance and a long lifespan. Also, to realize a novel engine, provided is a novel engine which is environmentally friendly and has a long lifespan.

A pump body assembly, fluid machinery, and a heat exchange device. The pump body assembly includes: at least two structure members; a cylinder (20) disposed between the two structure members; and a piston assembly disposed in the cylinder (20). The piston assembly includes a piston sleeve (40) and a piston (50) slidably disposed in the piston sleeve (40); an upper end surface of the piston sleeve (40) fits and is limited by a lower end surface of one structure member disposed above the piston sleeve (40), so as to prevent the piston sleeve (40) from displacing along a radial direction relative to the one structure member, thereby effectively solving a problem in prior art that working efficiency of the pump body assembly is affected because the piston sleeve (40) of the pump body assembly is prone to eccentrically rotate.

Nuclear abrasive slurry waste pump systems, devices, and methods for retrieving waste materials and/or other material from storage tanks with liquefied tank material. The systems, devices and methods can work with tanks having high temperature conditions up to approximately 212 degrees Fahrenheit or low temperature conditions down to approximately 32 degrees Fahrenheit.

A positive-displacement pump or turbine includes a rotor casing that defines a rotor chamber having a contoured wall that forms a plurality of lobes. A rotor is positioned within the rotor chamber, and has an outer rotor surface spaced inward from the contoured wall at the lobes. Vanes are mounted around the outer rotor surface, and structures associated with the vanes follow a track or groove defined by the rotor chamber as the rotor spins, thereby forcing the vanes radially inwardly and outwardly to follow a curvature of the contoured wall.

A pump assembly comprising a housing, a support frame that can be attached to the housing, and a rotor that can rotate within the housing. The housing consists of resilient material and comprises an interior surface, an inlet portion including an inlet for fluid, an outlet portion including an outlet for the fluid, and a diaphragm portion. A housing-engaging surface area of the rotor will form a sealing interference contact with the interior surface, and a chamber-forming surface area of the rotor disposed radially inward from the housing-engaging surface area will form a chamber with the interior surface. When the rotor rotates within the housing as in use, the chamber can convey fluid from the inlet portion to the outlet portion. The diaphragm portion will bear against the chamber-forming surface as the chamber-forming surface travels from the outlet to the inlet, to prevent fluid passing from the outlet to the inlet and to expel the fluid from the chamber through the outlet portion. The support frame will be attached to spaced-apart portions of the housing, and will be sufficiently stiff to counter-balance the torque applied to the housing by the rotor.

A modular system for a pump structure for the axial integration of a selection of electric drive assemblies (1) at a selection of pump assemblies (2) and a shaft bearing assembly (3) which includes a pump shaft (31) and a shaft bearing (32) with at least two rolling bearing sets, the shaft bearing (32) supporting the pump shaft (31) between a motor rotor (1) of the electric drive assembly (1) and a pump rotor (21) of the pump assembly (2) at a pump housing (20) of the pump assembly (2); wherein the selection of pump assemblies (2) jointly comprises a collar portion (23) at the pump housing (20) which accommodates the shaft bearing (32) in a through-hole of the pump housing (20) and protrudes to an accommodation side for an electric drive unit (1); and the selection of pump assemblies (2) differs with respect to the pump rotor (21) and/or a pump chamber (22); the selection of drive assemblies (1) jointly comprises a motor rotor (11) which is formed at a radially external section in the shape of a rotor cup (13), the rotor cup (13) radially encircling and axially intersecting the collar portion (23) that each pump housing (20) of the selection of drive assemblies (1) jointly comprises; and the selection of drive assemblies (1) differs with respect to a stator (12); and wherein for each combination of the selection of electric drive assemblies (1) and the selection of pump assemblies (2), at least one radial dimension of the pump shaft, the shaft bearing, the collar portion (23) and/or the rotor cup (13) are the same.

A transmission structure of motor connection of roots pump comprises a shaft sleeve, a motor shaft cavity is opened inside the shaft sleeve, and the inner circle of the motor shaft cavity is concentrically meshed with the excircle of the motor shaft; a fixed bolt mounting cavity is opened on the outer surface of the shaft sleeve, a bolt through-hole is opened in the fixed bolt mounting cavity, the shaft sleeve is fixedly connected with the gear seat through a hexagon bolt, and the gear seat and the shaft sleeve rotate synchronously at the same shaft center; a gear is fixedly connected with the gear seat with a bolt, the gear seat is fixed to the pump shaft through a first keyway under the fitting between the first keyway and a first shaft key, and the pump shaft and the motor shaft are coaxially arranged at the center. The utility model overcomes the disadvantages of the prior art, which is convenient to install without wearing parts, not affected by temperature, pressure and external dust; and the structure is simple with compound seal and oil protection function; and when a motor with a motor shaft is selected, only the diameter and keyway of the motor shaft cavity of the part are required to fit the new motor.

A pump technology that provides for more effective and efficient transfer of liquids, such as petroleum products and components, to and through pipelines. Such a technology can comprise a type of external gear pump that creates higher flow, resulting in higher pressures in the pipeline, to move the liquids, while providing for longer pump life, simpler and less maintenance, and fewer undesired conditions, with a smaller footprint, in a cost-effective system. Further, one or more portions of the pump can be configured to be easily replaceable to provide for maintenance in place, and provide for longer pump life. Additionally, one or more portions of the pump can be constructed with or coated with abrasive resistant material that extends the life of the external gear pump. Such material can also reduce the friction between surfaces and improve the life of the external gear pump under poor feeding conditions.

A concrete form for holding a concrete product in place during a curing process with at least one side movable by a rotary driven power source and a actuator. A rotary power tool with a helical cutout combinable to a second adapter on the rotary driven power source to rotate the rotary driven power source to power the actuator and move the at least one side.