Peristaltic Pump

Abstract

A peristaltic pump for conveying fluids includes a stator and a rotor supported therein. A flexible hose is integrated in the stator and the rotor includes radially arranged conveying elements which squeeze the hose over a section containing the fluid. The squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor. The conveying elements are designed as rotatably mounted rollers that include at least two rolling bearings, of which the outer rings are connected via a common outer sleeve and of which the inner rings are connected to the rotor. Under the effect of the motor, the rotor moves in the stator and the outer rings of the conveying elements roll on the inner surface of the stator.

Description

BACKGROUND AND SUMMARY OF THE INVENTION[0001]The invention relates to a peristaltic pump for conveying fluids, comprising a stator and a rotor supported therein, wherein a flexible hose is integrated in the stator and the rotor comprises radially arranged conveying elements which squeeze the hose over a section containing the fluid, and wherein the squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor.[0002]A peristaltic pump is a positive displacement pump in which the medium to be conveyed is pushed through a hose by the external mechanical deformation thereof. German Patent Document DE 10 2008 002 761 A1 discloses an example of such a pump. A drawback of these pumps the high frictional forces occurring between the hose and the conveying elements when the hose is squeezed. As a result of these increased frictional forces, both the transmission driving the rotor of the peristaltic pump and the hose itself are subjected to heavy lo...

AI Technical Summary

Benefits of technology

[0003]Exemplary embodiments of the present invention are directed to a peristaltic pump having a long service life, in which the transmission and conveying medium hose are prevented from becoming damaged during operation.

[0005]Rolling bearings, also known as ball bearings, are bearings in which two components that are movable relative to one another, namely the “inner ring” and the “outer ring”, are separated by rolling bodies. They are used to support radial and axial forces in axles and shafts and are intended to minimize the power loss and wear caused by friction. Rolling friction primarily occurs between the three main components, the inner ring, outer ring and rolling bodies. Since the rolling bodies in the inner and outer rings roll on hardened steel surfaces with optimized lubrication, the rolling friction of these bearings is relatively low.

Problems solved by technology

A drawback of these pumps the high frictional forces occurring between the hose and the conveying elements when the hose is squeezed.

As a result of these increased frictional forces, both the transmission driving the rotor of the peristaltic pump and the hose itself are subjected to heavy loading.

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