RU30879U1 - Double Inlet Centrifugal Pump - Google Patents

Description

Double Inlet Centrifugal Pump

The present invention relates to pump engineering, and in particular to designs of centrifugal pumps with an impeller of a two-way inlet.

A well-known centrifugal pump ("Dynamic pumps, Atlas, VVMalyushenko, M.," Engineering, 1984, l.54, Fig. 91) with a two-inlet impeller, consisting of a stator containing a housing with a horizontal connector along the working axis wheels, inlet and discharge nozzles mounted on the housing, chambers at the inlet of the impeller, connected by channels between each other and with the inlet nozzle, the rotor with the impeller of the two-sided entrance, and bearings placed in the stator, one of which is contact-stop, and the rotor mounted rotatably n bearings and passages are formed in the housing.

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

Closest to the invented invention is a centrifugal pump with an impeller of a two-way inlet (“Dynamic pumps, Atlas, V.V. Malyushenko, M.,“ Engineering, 1984, p. 64, Fig. 106), consisting of a stator containing an integral housing , inlet and discharge nozzles, a guide vane with blades, mounted on the housing, chambers at the inlet of the impeller, connected by channels between each other and with the inlet, of a rotor with an impeller of two-sided inlet and bearings located in the stator, one of which is supporting-thrust , and the mouth The OR is mounted rotatably on bearings, and the channels are made in the pump housing.

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 flow part of the pump by performing channels in the blades of 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 by the fact that in a centrifugal pump with an impeller of a two-way inlet, consisting of a stator containing an integral body, an inlet and a pressure pipe, a guiding apparatus with vanes, mounted on the casing, cameras at the inlet of the impeller connected by channels with each other and with the inlet pipe, the rotor with the impeller of the two-sided input, and bearings, one of which is support-thrust, and the rotor is mounted for rotation on bearings located in the stator, the inlet pipe is connected only of one of the chambers at the inlet of the impeller, and the channels connecting the chambers are formed in the blades of the guide apparatus.

In the inventive pump, in contrast to the analogue and prototype, the channels connecting the chambers to each other at the entrance to the impeller are made in thin-walled vanes of the guiding apparatus, which ensures minimal losses in the hydraulic path connecting the chambers, increases the manufacturability of the pump and improves its overall dimensions .

To achieve the best overall dimensions, the blades of the guide vane are made thin-walled, and the contours of the through hole in the vane forming the channel have a shape close to the shape of the contour of the vane.

The invention is further illustrated by an example of its use, illustrated in figure 1, which shows a longitudinal section of the pump and fig. 2 and 3, which show the guide apparatus with the translated channels made in it, where

1-building

2-inlet pipe

6 camera

7-camera

8-way impeller, two-way input,

9-rotor, 10-pillow block bearing,

11-direction bearing, 12-channel.

The pump stator comprises a housing 1, an inlet 2 and a pressure head 3 nozzles and a guiding apparatus 4 with vanes 5, fixedly mounted on the housing 1, chambers 6 and 7 at the entrance to the impeller 8, mounted on the rotor 9. The rotor 9 is mounted for rotation on the support the bearing 10 and the thrust bearing 11 located in the stator. In the blades 5 of the guiding apparatus 4, channels 12 are made, hydraulically interconnecting chambers b and 7 at the entrances to the impeller. The contour of the through hole in the blade 5 forming the channel 12 has a shape close to the shape of the contour of the blade 5.

The pump operates as follows. When the rotor 9 rotates, the liquid from the inlet pipe 2 enters the chamber 6 at the entrance to the impeller 8, and through the channels 12 in the blades 5 of the guide apparatus 4 enters the chamber 7 at the inlet of the impeller 8, from the chambers 6 and 7 is fed to the impeller 8 and through the guide apparatus 4 to the pressure pipe 3.

Unlike the prototype, the channels that hydraulically connect the chambers at the entrance to the impeller are not made in the casing, which complicates and complicates the design of the prototype casing, but in thin-walled blades of the guiding apparatus without increasing the dimensions of the latter, but with a decrease in its mass.

Thus, in the claimed invention, an increase in the manufacturability of the Manufacture and improvement of overall dimensions are achieved by simplifying the design of the housing, facilitating the guiding apparatus and simplifying the assembly of the pump.

Claims (2)

1. A centrifugal pump with an impeller of a two-way inlet, consisting of a stator containing an integral housing, an inlet and a discharge pipe, a guiding apparatus with vanes mounted on the casing, chambers at the inlet of the impeller, connected by channels between themselves and with the inlet pipe, of a rotor with the impeller of the two-sided entrance, and bearings, one of which is supporting-thrust, and the rotor is mounted for rotation on bearings located in the stator, characterized in that the inlet pipe is connected only with one of the chambers in ode to the impeller, and the channels connecting the chambers are formed in the blades of the guide apparatus. 2. The centrifugal pump according to claim 1, characterized in that the vanes of the guide vane are made thin-walled, and the contour of the through hole forming the channel in the vane has a shape close to the shape of the contour of the vane.