RU52449U1 - CENTRIFUGAL PUMP - Google Patents

Abstract

The utility model relates to devices for pumping liquid media. The pump can be used in milk reception and processing lines of producing and processing enterprises. Improving the quality of milk (reducing bacterial contamination) and increasing productivity is achieved by the fact that on the impeller blade 6 of the impeller there are additionally installed tangential diameters D parallel to the radial 11, blades 12. On the inner end surfaces of the housing 1 around the main and covering disks are blades 8 located on both sides of the blade disk 6. In branch 9, tangentially to the outer diameter of the blade wheel 6, baffle plates 10 are installed. Fluid flow coming out from the tang potential blades 12, is reflected by the baffle plates 10 and collides with the fluid flow coming from the radial blades 11. The presence of the baffle plates 10 increases the pressure difference, since they provide additional resistance to the flow of fluid in the branch 9. Due to the braking of the fluid and the pressure difference, periodic high-frequency pressure fluctuations occur fluid in the impeller, which causes cavitation, which favorably affects the reduction in the number of bacteria in milk.

Description

The utility model relates to a device for pumping liquids and can be used mainly in milk reception and processing lines of manufacturing and processing enterprises.

A centrifugal pump is known, comprising a housing, an impeller with inter-bladed channels formed by a main, covering and lobe disks, the diameter of the main disk exceeding the diameters of the lobe and lining, ribs are fixed along the axis of the main disk along the axis of the blades, and fender plates are installed in the inter-blades [I ].

This centrifugal pump is designed to disperse the pumped heterogeneous media.

A centrifugal pump is also known, comprising a housing with an inlet equipped with fixed vanes with slots, an impeller mounted on the shaft and a disk with protrusions located in the slots, and hydroacoustic vibrators are installed on the outer side of the disk, and the blades are equipped with reflectors located at an angle to the radius of the disk 2].

This centrifugal pump is designed for pumping heterogeneous media.

The closest in technical essence to the proposed one is a centrifugal pump containing a housing, an impeller with inter-blade channels formed by the main, covering and blade disks, the main and covering disks being made smaller in diameter than the blade disc, and on the inner end surfaces of the housing around the main and the covering discs are fixed blades on both sides of the blade disc [3].

In the proposed centrifugal pump, comprising a cylindrical body with discharge and suction nozzles, an impeller with radial rectilinear blades placed inside it on the shaft,

fixed radial blades mounted on the housing on either side of the blade disk. In addition, equidistant blades are installed on the impeller, parallel to the radial, and in the tap there are fender plates located concentrically with the impeller.

The blades mounted on the inner end surfaces of the casing, around the main and covering disks, and located on both sides of the blade disk, enhance fluid braking and provide fluid circulation with a variable flow rate from the output of the blade disk to the impeller by changing the bore (the distance between the end edges impeller blades and end edges of the blades).

The radial arrangement of the blades maximizes the inhibitory effect on the fluid, that is, provides the maximum mechanical impact of the impeller on the flow.

Equally remote, parallel to the radial, the blades form a two-dimensional closed space, in which the mechanical effect on the flow is also intensified. In addition, equidistant parallel to the radial blades will already be tangential to the diameter D, which will increase the head developed by the pump.

The baffle plates located concentrically to the impeller increase the flow of a part of the liquid from the exit of the blade disk into the inter-blade channels along the perimeters of the main and covering discs due to the pressure difference.

An analysis of the totality of the claimed features showed that their identical application in other technical solutions was not found; This circumstance allows us to consider the solution as new and industrially applicable.

Figure 1 shows a General view of a centrifugal pump. Figure 2 shows a section aa in figure 1.

The centrifugal pump comprises a housing 1 with an inlet 2 and a pressure head 3 nozzles. In the housing 1 is an impeller, consisting of a main

4, covering 5 and blade 6 disks forming the inter-blade channels 7 of the impeller. The main 4 and covering 5 discs are made of a smaller diameter than the blade disk 6. On the inner end surfaces of the housing 1 around the main 4 and covering 5 discs are installed radially blades 8. The blades 8 are located on both sides of the blade disk 6. Along the perimeter of the impeller in the housing 1 a cylindrical bend 9 is located, connecting the inter-blade channels 7 with the pressure pipe 3.

The workflow proceeds as follows. When the impeller rotates, the liquid (milk) from the inlet pipe 2 enters the inter-blade channels 7 formed by the disks 4, 5 and 6. As a result of the interaction of the liquid in the inter-blade channels 7 with radial 11 and tangential 12 vanes of the blade disk 6, centrifugal forces are manifested: pressure as it moves away from the center of rotation, it increases and a directed fluid flow forms from the center of the impeller to the periphery. In the closed part of the inter-blade channels 7, the liquid makes a complex movement: rotates together with the impeller (portable movement), moves along the blades 11, 12 of the blade disk 6 (relative motion). The fluid flow coming from the tangential blades 12 is partially reflected by the baffle plates 10 and collides with the fluid flow coming from the radial blades 11. In the open part of the inter-blade channels 7, the fluid exits from the ends of the impeller to the outlet 9, continuing to rotate together with the blades of the blade disk 6. The fluid is braked against the inner end walls of the housing 1, the blades 8 and the baffle plates 10 mounted on them, lags behind the rotating blades of the blade disk 6 and additionally interacts with it. Part of the total flow returns back to the inter-blade channels 7 of the impeller along the inner end surfaces of the housing 1, along the blades 8 and around the perimeters of the main 4 and covering 5 discs due to the pressure difference at different distances from the center of rotation and the additional impact established tangentially of the baffle plates 10. Due to the braking of the fluid on the inner surface of the housing 1, changes in the distance between the end

the surfaces of the rotating blades of the blade disk 6 and the end surfaces of the blades 8 (bore) there are periodic high-frequency fluctuations in the pressure of the liquid in the impeller, which causes local hydraulic shocks, favorably affecting the reduction in the number of bacteria in milk and improving the quality of milk according to this indicator. The main part of the fluid flow through the inter-vane channels 7 enters the outlet 9 and through it into the discharge pipe 3. Thus, bacterial contamination is constantly reduced in the milk flow passing through the centrifugal pump.

The use of the proposed centrifugal pump in the milk reception and processing lines will improve its quality without special processing in the process of inevitable technological transportation from one tank to another.

Literature

1. Ac. 879029 USSR IPC cl. F 04 D 7/04, Centrifugal pump - I.V. Kelman et al. No. 2735512 / 25-06, Declared January 25, 79; Publ. 11/07/85; Bull. No. 41.

2. Ac. 885619 USSR IPC cl. F 04 D 7/04, Pump for pumping heterogeneous media - Yu.I. Karnatsky and T.T. Shablovsky No. 2900117 / 25-06, Declared 03/26/80; Publ. 11/30/81; Bull. No. 44.

3. Ac. 14257 USSR IPC cl. F 04 D 7/04, Centrifugal pump - V.N. Shulyatiev, V.G. Mokhnatkin, V.M. Russkikh and others No. 99124606/20, Declared November 19, 1999; Publ. 07/10/2000; Bull. No. 19.

Claims (1)

A centrifugal pump for pumping food media, comprising a cylindrical housing with discharge and suction nozzles, an impeller with radial rectilinear blades placed inside it on a shaft, fixed radial blades mounted on the housing on either side of the impeller disk, characterized in that the impeller is mounted equidistant parallel to the radial blades, and in the tap there are baffle plates located concentrically with the impeller.