RU25208U1 - CENTRIFUGAL PUMP WITH SYMMETRIC VEHICLE LOCATION - Google Patents

Description

Symmetrical Centrifugal Pump

The present invention relates to pump engineering, and in particular to designs of centrifugal pumps with a symmetrical arrangement of the impellers.

A centrifugal pump is known (patent DE 3040747 F03B3 / 10 29/10/80) with a symmetrical arrangement of the impellers, consisting of a stator containing a housing with a cover, inlet and discharge nozzles, guide vanes mounted on the housing, and transfer channels between symmetrically arranged steps, a rotor with symmetrically arranged impellers mounted on bearings located in the stator, one of which is supporting-thrust, and the transfer channel pipe is placed on the outer surface of the housing.

The disadvantage of this pump is the increased weight and dimensions.

The closest to the created invention is a centrifugal pump ("Dynamic pumps, Atlas,

V.V. Malyushenko, M., “Engineering, 1984, p. 81, fig. 148), consisting of a stator containing a housing with a cover, inlet and discharge nozzles, guiding devices mounted on the housing, and transfer channels between symmetrically located steps, of a rotor with symmetrically arranged impellers mounted on bearings located in the stator,

MPKR04V1 / 00

impellers

one of which is support-thrust, and the transfer channels are cast in the pump housing and cover.

The disadvantage of this pump is the large mass of the housing, its low adaptability and the complexity of the assembly of the entire pump.

The present invention is based on a constructive solution to the problem of transferring fluid between symmetrically arranged steps within the flow part of the pump by making transfer channels in the guide apparatus.

The technical result of the invention is to improve the overall dimensions of the pump, simplifying its design and assembly.

The technical result is achieved in the inventive pump, consisting of a stator containing a housing with a cover, inlet and discharge nozzles, guiding devices mounted on the housing, and transfer channels between symmetrically arranged steps, a rotor with symmetrically located impellers mounted on bearings placed in the stator, one of which is supporting-thrust, and the translated channels are made in the guide apparatus and the cover.

In the inventive pump, in contrast to the analogue and prototype, the transfer channels are made in a guide apparatus, which increases the manufacturability of the pump and leads to an improvement in its overall dimensions.

The invention is further illustrated by an example of its use, illustrated in FIG. 1 and FIG. 2, which respectively shows a longitudinal section of the pump and the guide device of the second stage with translated channels made in it, where

3-inlet pipe

4-discharge pipe

5-way apparatus of the first stage,

6-directional apparatus of the second stage,

7-rotor

8-impeller of the first stage,

9-impeller of the second stage,

10-pillow block bearing

11-thrust bearing.

The stator of the pump comprises a housing 1 with a cover 2, an inlet 3 and a pressure head 4 nozzles and guide vanes of the first 5 and second 6 stages, mounted on the housing 1. On the rotor 7, the impellers of the first 8 and second 9 stages are symmetrically fixed. The rotor 7 is mounted on the thrust bearing 10 and the thrust bearing 11 located in the stator. The transfer channels are made in the guide apparatus 6 and the cover 2.

The pump operates as follows. When the rotor 7 rotates, the liquid from the inlet pipe 3 enters the impeller 8, the guide apparatus 5 and through the transfer channels in the guide apparatus 6 and the cover 2 enters the impeller 9 of the second stage and through the guide apparatus 6 to the discharge pipe 4.

In contrast to the prototype, the transfer channels are not carried out in the housing, which complicates and aggravates its design, but in the guiding apparatus without increasing the dimensions of the latter, but with a decrease in its mass. Also shown in FIG. 1 and FIG. 2 design in comparison with the prototype has fewer seating surfaces, which increases the accuracy of centering of the rotor relative to the stator and simplifies the assembly of the pump.

Thus, in the claimed invention, an increase in manufacturability and an improvement in overall dimensions are achieved by simplifying the design of the housing, facilitating the guide apparatus, reducing the number of seating surfaces and simplifying assembly of the pump.

Claim

1. A centrifugal pump with a symmetrical arrangement of the impellers, consisting of a stator containing a housing with a cover, inlet and discharge nozzles, guiding apparatuses mounted on the housing, and transfer channels between symmetrically arranged steps, as well as a rotor with symmetrically located impellers, installed on bearings located in the stator, one of which is support-thrust, characterized in that the transfer channels are made in a guide apparatus. Approach Trigger Transfer Channels

Claims (1)

A centrifugal pump with a symmetrical arrangement of the impellers, consisting of a stator containing a housing with a cover, inlet and discharge nozzles, guiding devices mounted on the housing, and transfer channels between symmetrically located steps, as well as a rotor with symmetrically located impellers mounted on placed in the stator bearings, one of which is support-thrust, characterized in that the transfer channels are made in a guide apparatus.