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Centrifugal pump with reinforced plastic impeller wheel

a centrifugal pump and reinforced plastic technology, applied in the direction of machines/engines, non-positive displacement fluid engines, liquid fuel engine components, etc., can solve the problems of impeller wheel breaking and impeller wheel not being able to handle very high hydraulic output, so as to achieve high hydraulic load, relieve the plastic of the impeller wheel, and transfer high speed

Inactive Publication Date: 2019-05-02
RICHTER CHEM TECHN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a centrifugal pump with a solid core made of metal or high-strength plastic that provides reinforcing support from the shaft-hub connection of the pump shaft to the rear disk, the pump vanes and the front disk. This allows for high hydraulic loads to be transferred and high speeds to be reached. The limits of use for plastic-lined centrifugal pumps are increased in terms of pump head, delivery rate and temperature. The front disk is connected cohesively or positively to the rear disk via the support cores of the impeller wheel vanes.

Problems solved by technology

Nevertheless, the impeller wheel is not able to handle very high hydraulic outputs.
The dynamic and static loads of the impeller wheel under pressure, temperature, and high speed can exceed the yield strength of the plastic and cause the impeller wheel to break.

Method used

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  • Centrifugal pump with reinforced plastic impeller wheel

Examples

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Embodiment Construction

[0016]A centrifugal pump has an unillustrated two-part housing shown in broken lines at 6 and joined at a plane 9 that extends through a chamber 10, so that the inner walls of the chamber 10 and of intake and output ports 11 and 12 can be provided with little effort with a lining 13 of a plastic that protects the inner walls of both the chamber and the ports 11 and 12. The housing 6 is made of metal or of a hard plastic composite. A fully fluorinated, partially fluorinated, or non-fluorinated plastic is used as the plastic of the lining 13 in order to obtain high-quality corrosion or purity protection of the pressure- and power-transmitting pump parts.

[0017]An impeller wheel 1 enclosed in the plastic-lined chamber 10 has a hub 8 from which a circular rear disk 2 extends radially. The hub 8 is formed with a blind normally threaded bore 7 that receives one end of a shaft 14 of an electric motor 15 or magnetic coupling. Furthermore, the impeller wheel 1 has a front annular front disk 3...

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PUM

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Abstract

A centrifugal pump has a housing forming a chamber having intake and output ports and a plastic lining in the chamber An impeller wheel in the chamber is formed by a hub rotatable about an axis, a rear disk projecting radially from the hub, a front disk projecting radially from the hub and offset axially from the rear disk, and radial vanes extending axially between the disks. The hub, disks, and vanes are formed of a high-strength material such as metal and carries a coating on outer surfaces of the hub, disks, and vanes of a plastic of lower strength than the material.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a centrifugal pump. More particularly this invention concerns a reinforced plastic impeller wheel for such a pump.BACKGROUND OF THE INVENTION[0002]A centrifugal pump normally has a housing forming a chamber holding an impeller wheel and has intake and output ports, with the chamber and the intake and output port being lined with protective plastic and the impeller wheel consisting mainly of plastic, and with the rear disk of the impeller wheel that is facing away from the chamber intake having an inner support core.[0003]A centrifugal pump with inner plastic lining and a plastic impeller wheel with a rear wheel that is reinforced by means of a metal insert is known from EP 0 797 736. In this known pump, the stability of the plastic impeller wheel is improved. Nevertheless, the impeller wheel is not able to handle very high hydraulic outputs. The dynamic and static loads of the impeller wheel under pressure, temperature, an...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04D29/24F04D29/42
CPCF04D29/24F04D29/4286F05D2300/43F04D29/026F04D29/2222F04D29/2227F04D29/2294F05D2300/10
Inventor CORTELLO, DENISKLEINING, GREGORRENNETT, ULRICH
Owner RICHTER CHEM TECHN GMBH