Device and procedure for axial thrust compensation

Inactive Publication Date: 2008-08-07
RITZ PUMPENFAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030]In that way it is possible for the axial thrust compensating arrangement according to the invention to be retrofitted in conventional vertical pumps at a low level of complication and expenditure, in order in that way further to increase the operational reliability and service life thereof.
[0031]In this connection it should also be mentioned that the above-described feed for the predetermined low pressure by way of a compensating conduit which is in the form of an axial passage in a shaft in the vertical pump is particularly suitable for retrofitting existing pumps with the axial thrust compensating arrangement proposed herein

Problems solved by technology

Due to the loading on the thrust bearings the axial thrust increases the wear thereof and thus shortens the service life of the bearings.
The efficiency of the pump is also adversely affected.
That signifies a considerable increase in th

Method used

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  • Device and procedure for axial thrust compensation
  • Device and procedure for axial thrust compensation
  • Device and procedure for axial thrust compensation

Examples

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Embodiment Construction

[0041]FIG. 1 shows an embodiment by way of example of a vertical pump. In this connection, in the simplest case the term vertical pump is used to denote the combination of a drive unit with a rotary pump unit, which are arranged one above the other substantially perpendicularly to the level on which the pump stands. As noted in the opening part of this specification, the term vertical pump is used here to denote a pump in which in use the pump shaft is oriented substantially vertically. Furthermore it should be established for clarification purposes that, for a vertical pump, when pumping a fluid against the force of gravity ‘down’ is defined in relation to the vertical pump by the suction side of the pump unit and correspondingly ‘up’ in relation to the vertical pump corresponds to the pressure side of the pump unit.

[0042]The vertical pump shown in FIG. 1 comprises a drive unit 1 which can be for example an electric motor and a rotary pump unit 2 which is fixed to the drive unit 1 ...

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Abstract

Compensation for the axial thrust in a pump, in particular a vertical pump, having at least one drive unit and at least one rotary pump unit. In operation of the pump a compensating piston which is axially non-displaceably connected to the shaft of the impeller wheel of the rotary pump unit is subjected to a pressure difference which results from the pump pressure and a lower pressure and from which there is produced a force which is directed in opposite relationship to the axial thrust and which acts on the shaft of the impeller wheel. There are further proposed a method of axial thrust compensation and a method of retrofitting an arrangement for axial thrust compensation to a pump, in particular a vertical pump, and a retrofit module therefore.

Description

FIELD OF THE INVENTION[0001]The invention generally concerns a pump, in particular a vertical pump, a procedure for or method of compensating for the axial thrust which occurs in operation in a pump, and a method of retrofitting axial thrust compensation to a pump and a corresponding retrofit module for axial thrust compensation on a pump.BACKGROUND OF THE INVENTION[0002]The pumps being considered here have at least one impeller wheel which is driven by way of a shaft by at least one drive unit, wherein in operation an axial thrust corresponding to the pump pressure acts on the shaft of the impeller wheel. The term vertical pump is used here to denote a pump in which in use the pump shaft is oriented substantially vertically.[0003]As mentioned hereinbefore, a force acting in the axial direction, referred to as axial thrust, acts on the shaft of the pump in operation thereof. That force results from the loading of the pump impeller wheel or wheels by the fluid to be delivered and is ...

Claims

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Application Information

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IPC IPC(8): F01D3/04
CPCF04D29/0416
Inventor NEISZER, JOHANN
Owner RITZ PUMPENFAB
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