CS264169B1 - Link hydrodynamic pump - Google Patents

Abstract

The solution concerns a hydrodynamic cell pump. The essence of the solution is that segments are formed on the front side of the integrated cell body, separating individual channels with an expanding inner surface in the circumferential direction, while smoothly passing into an axial gap for transferring liquid into radial centrifugal channels. The cells are separated from each other by intermediate walls and the assembly is inserted into an external flush tube, which closes the axial gap from the outside. The solution can be used mainly in pumps with a large number of stages.

Description

The invention relates to a multi-stage hydrodynamic pump.

At present, multi-stage pump designs are known in which the cell bodies are formed by radial, radial-axial and axial directional distributors and actuators. In addition, axially centered or bladeless channel diffuser designs are known. The disadvantages of the known blade, most often spatially curved systems, are the high demands on production technology. They complicate both the production of modeling equipment and actually the formation of cores, making it difficult to cast the cells, thereby increasing confusion and manufacturing costs. This applies in particular to small-sized pumps. In doing so, they limit the use of difficult to cast metal and non-metal materials.

Known bladeless channel diffuser cell according to the. AO 217 516, which addresses these technological difficulties, is characterized by a non-circular shape. In a wide range of applications, especially where it is desirable to maximize the use of the design space, for example in submersible borehole pumps, both the non-circular external shape and the need for alternating surfaces have a negative effect.

The above-mentioned drawbacks are substantially eliminated by the articulated hydrodynamic pump according to the invention, which consists of the articulated cells, which consist of articulated divisions separating the articulated elements, an integrated body of the articulated body, the segments of which are separated from each other channels with an expanding inner surface in the circumferential direction while continuously passing into the axial gap to transfer fluids to radial centripetal channels and an external pipe to be clad, which closes the axial gap from the outside. The axial gap may be circumscribed in radial direction by non-concentric circular arcs. The link divider can be connected to segments on a curved flat.

The higher effect of the pump according to the invention is that it allows easy formation and casting of the diffusers of the multistage pumps. It enables the application of highly productive production technologies such as stamping, injection molding, powder metallurgy with minimum machining requirements. The design concept is characterized by a circular outer shape of the pump. The diffuser is characterized by simplicity, with integrated diffusion functions in the radial direction with a sudden transition to the controller and efficient conduction to the next stage. This integrated single-body function respects the technological aspects of the design to the maximum extent and at the same time ensures advantageous flow conditions in the bladeless gearbox. The pump is characterized by good efficiency, maximum work intensification and stable characteristics. Have a higher effect! especially for small-size pumps with a large number of stages.

An example of a specific embodiment of the invention is shown schematically in the accompanying drawings, wherein FIG. 1 is a cross-section; FIG. 2 shows a view of the cell body, FIG. 3 is a cross-sectional view of FIG. 1 shows the cell body through the distributor segments; FIG. 4 is a section along line C-C of FIG. 1 through the channels of the transmitter and FIG. 5, 6 show schematically the basic embodiments of the casing elements and the divisions in connection with the individual casing elements.

The pump element according to the invention consists of a fitting tube 6, a diffuser 8, a link divider 1, a conventional wheel 7 on the shaft 11. The individual links are tightened by clamping screws 10 between the sets. Individual links are sealed by O-rings 9 from the outside.

The liquid exiting the impeller 7 is guided by the segments 2 to the axial holes 3, which transfer it to the channels 12 of the centrifugal actuator. Through the centrifugal ducts 12 the transported liquid is supplied to the inlet of the next stage impeller or to the discharge line.

Claims (3)

SUBJECT MATTER An articulated hydrodynamic pump, characterized in that the links consist of link cells (1) separating the individual cells, from the integrated cell body, on the front of which the segments (2) are formed, separating the individual channels with the expanding inner surface (4). ) in the circumferential direction, passing smoothly into the axial gap (3) for transferring the liquid into radial center channels (12), and out of the other matching tube (6), which closes the axial gap (3) from the outside. The articulated hydrodynamic pump according to claim 1, characterized in that the axial gap (3) is delimited in the radial direction by two non-concentric circular arcs. The articulated hydrodynamic pump according to claim 1 or 2, characterized in that the cell baffle (1) is connected to the segments (2) on a curved surface (13).