SU947475A1 - Centrifugal pump - Google Patents

Description

(5) CENTRIFUGAL PUMP

one

This invention relates to hydro-hydro. shinostroeniyu and can be used in centrifugal pumps.

A centrifugal pump is known, comprising a housing, an impeller mounted therein with blades, having an elastic sheath fixed on a shaft, in which a channel is made, connected to a source of environmental control 13..

For the described pump, an insufficiently wide range of operating modes is characteristic, since the dimensions of the blades in the impeller of this pump remain unchanged and require changing the size and configuration of the flow part of the body, which leads to complication of the design and additional costs for the manufacture and maintenance of the pump.

The purpose of the invention is to expand the range of operating modes of the pump.

This goal is achieved by the fact that the impeller is provided with perforated plates interconnected, mounted on a shaft and serving blades, the shell covers the latter to form a sealed cavity and the thickness of the shell walls is increased from center to periphery.

2

1 shows a centrifugal pump, a longitudinal section; in Fig.2 the blade in section.

The centrifugal pump comprises a casing 1, an impeller 2 with blades 3 mounted therein, having an elastic sheath 4 mounted on a shaft 5 in which a channel 6 is connected to the control medium source 7, and the impeller 2 is provided with perforated plates 8 interconnected, mounted on the shaft 5 and serving as blades 3, the shell 4 covers the latter with the formation of a sealed cavity 9 and the thickness of the steak of the shell 4 is made increasing from the center to the periphery.

The device works as follows.

: If it is necessary to reduce the supply of fluid to the consumer from the source 7 of the control, the medium is fed through the channel 6 in the shaft 5 and through the perforated plates 8 into the hermetic cavity 9v deforming the elastic shell 4 and shortening the length of the blades from

to S .. And

min0.

max

 The proposed constructive implementation of the pump allows to expand the bottom-, range of modes of operation, simplifying the design

Claims (1)

Claim A centrifugal pump containing a casing, an impeller with blades installed in it, having an elastic shell mounted on a shaft, in which a channel is connected, connected! the impeller is equipped with perforated plates interconnected, mounted on the shaft and serving blades, the shell covers the latter with the formation of a sealed cavity and the wall thickness of the shell is made increasing from the center to the per iferia.