Screw assembly (1) for a triple screw pump (10), comprising: a central screw (2) and at least one lateral screw (3) configured to mesh with said central screw (2) with a lateral screw axis (z.sub.l) parallel to the central screw axis (z.sub.c), wherein a central screw external diameter (?.sub.ce) is greater than a lateral screw external diameter (?.sub.le) and a central screw internal diameter (0ci) is smaller than the lateral screw external diameter (?.sub.le).

A modular rotor assembly for a screw pump including a power rotor and an idler rotor having respective first ends adapted to be disposed in a suction side of the screw pump and respective second ends adapted to be disposed in a discharge side of the screw pump, the power rotor including a balance piston adapted to be disposed within a pump housing of the screw pump with a radial clearance between an entire circumference of the balance piston and the pump housing is in a range between 1 micron and 200 microns, wherein the power rotor is provided with a tapered bearing surface configured to define a wedge-shaped, radial gap axially intermediate the power rotor and the idler rotor.

Provided is a cooling module including a reservoir tank in which cooling water is stored, a screw pump coupled to the reservoir tank and having a cooling water inlet communicating with the reservoir tank to pump cooling water, and a direction control valve coupled to the reservoir tank, having an outlet port communicating with the reservoir tank, and having a plurality of inlet ports to change a direction of flow of cooling water according to an operation, so that efficiency corresponding to the use of a plurality of centrifugal pumps of the related art may be achieved by using a single screw pump, thereby reducing the number of parts and simplifying a package, while simplifying the configuration.

A screw spindle pump for the delivery of fluid media with a pump housing having an inlet channel with a first longitudinal axis, an outlet channel with a second longitudinal axis, a first drive spindle with a third longitudinal axis, and a second driven spindle. The spindles each include a profiled section between the inlet channel and the outlet channel, wherein the profiled sections of the spindles are engaged at least partially with one another and form, with the pump housing between the inlet channel and the outlet channel, a delivery section parallel to the longitudinal axis of the drive spindle with delivery chambers for the fluid medium. The second longitudinal axis of the outlet channel is disposed at an obtuse angle to the delivery section in the pump housing. The invention also relates to a method for operating a screw spindle pump.

Disclosed is a fluid circulating apparatus in which a reservoir, a valve part, and a pump part are integrated with one another, and the valve part and the pump part are disposed in the reservoir to thus achieve a compact structure, thereby achieving a reduced overall size and stabilizing a fluid circulation when pumping a fluid through a plurality of flow paths.

The disclosure relates to a screw pump comprising: a casing with an inlet, an outlet and a flow chamber between the inlet and the outlet; and at least two screws housed in the flow chamber to force a fluid flow through the flow chamber from the inlet to the outlet; wherein at least one of the screws comprises a lubricated polymer material.

An element for a counter-rotating twin screw processor is disclosed. The element has an axial bore for mounting on a screw shaft of the processor. The element or a portion of the element comprises a continuous self-wiping flight helically formed thereon. Further, the element comprises one or more lobes with a lobe profile that is defined in a radial plane of the element and is provided by a functionally continuous curve obtained by combining a first curve to a second curve. The second curve is a mirror-image of the first curve about a radial axis passing through a central axis of the element and one of two extreme points of the first curve. The first curve is represented by a mathematical expression.

The invention relates to a pump, a pump system and a method for pumping a medium. The pump for pumping medium comprises an inlet, an outlet, a drivable spindle and at least two follower spindles, wherein the drivable spindle and the at least two follower spindles are provided at a mutual angle to each other.

Screw assembly (1) for a triple screw pump (10), comprising: a central screw (2) and at least one lateral screw (3) configured to mesh with said central screw (2) with a lateral screw axis (z.sub.l) parallel to the central screw axis (z.sub.c), wherein a central screw external diameter (.sub.ce) is greater than a lateral screw external diameter (.sub.le) and a central screw internal diameter (0ci) is smaller than the lateral screw external diameter (.sub.le).

Disclosed is a fluid circulating apparatus in which a reservoir, a valve part, and a pump part are integrated with one another, and the valve part and the pump part are disposed in the reservoir to thus achieve a compact structure, thereby achieving a reduced overall size and stabilizing a fluid circulation when pumping a fluid through a plurality of flow paths.