Tubular impeller

FIELD: engines and pumps.

SUBSTANCE: tubular impeller comprises closed tube section with its walls having lengthwise slots. Tails-vanes are arranged above said slots that direct pressure flow coming out of said slots along tangent to impeller circle.

EFFECT: simplified design of tubular impeller that allows high-power small-diametre impellers without turbine shafts or guide vanes.

2 dwg

 

The invention relates to hydropower, in particular, to the design of jet impellers hydropower installations.

It is known that the torque generated by the working gidrokoles existing structures depends on the diameters of the impellers, and for the efficient operation of such wheels require the construction of turbine shafts and the use of guide vanes.

However, in some difficult mining conditions, the construction of the turbine shafts for installation dimensions of the impeller and guide vanes is not possible.

In the prior art it is known accepted as the closest analogue of the tubular impeller with a closed bottom and tangential output pressure flow (see EP 0521837 A1, 07.01.1993, F03B 3/08). The disadvantage of this tubular impeller design is the complexity.

The objective of the invention is to develop a design jet impeller particularly small diameter, capable of producing high torque and power, working without the turbine shaft and the guide vane.

The required technical result is achieved in the tube the impeller, including a closed bottom section of pipe, the walls of which are made of the longitudinal slit, over which set of hydrodynamic visors - blades for directions coming out of the cracks, the pressure is on stream tangentially to the circumference of the pipe.

The produced torque and power of the impeller of the proposed design will not only depend on the pipe diameter and length, and accordingly the length of the working gap. In cases where cramped conditions do not allow you to use a large diameter pipe, increasing the capacity of the unit is achieved by increasing the length of the pipe impeller and made it cracks.

The length of the tubular impeller may be several times greater than its diameter.

1 schematically depicts a tubular impeller of the proposed design. Figure 2 shows a cross section along a-A.

Tubular impeller includes supported on the shaft 1 through the bottom 2 of the pipe section 3, into which is inserted the end of the inlet pressure flow pipe 4. Pipe 4 above the impeller may be in a suspended position.

In the pipe wall 3 of the impeller made several longitudinal discharge slots 5, over which the entire length of installed hydrodynamic visors - blades 6, the guides extending from the slit discharge flow tangentially to the circumference of the pipe 3.

Instead of the pressure of the slots 5 in the walls of the tubes 3 can be performed longitudinal rows of holes.

The arrows indicate the direction of pressure flow and the direction of rotation of the impeller.

In the process, the tubular working collimore be supported mounted on the shaft 1 thrust and radial bearings and installed in the upper zone of the pipe 3 centering rollers.

The basic design allows the manufacture of impellers very small diameter, which due to the increased length will produce significant unit power and will find application in the construction in mountainous terrain high-pressure hydroelectric stations, where the construction of turbine shafts impossible.

Tubular impeller including a closed bottom section of pipe, the walls of which are made of the longitudinal slit, over which set of hydrodynamic visors-blades for directions emerging from the slits pressure flow tangentially to the circumference of the pipe.



 

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