Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Plural distributing means immediately upstream of runner
Patent
1988-12-15
1990-09-25
Price, Carl D.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Plural distributing means immediately upstream of runner
415202, F01B 2506, F03B 318
Patent
active
049589865
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a centrifugal action turbine in which a centrifugal flow of fluid acts on a rotor so as to cause rotation thereof.
A turbine of this type is described in patent CH-A-300139. This turbine comprises a cylindrical tubular pipe which is closed by a radial end wall, outlet passages being provided in the peripheral wall of this pipe. The latter is surrounded by an obturator which is itself surrounded by a rotor the buckets of which have an axial dimension much greater than that of said passages. This known turbine has disadvantages. In particular, the structure of the end part of the pipe produces very large head losses and the jets formed are not guided on their axially spaced sides and can only be aerated through the rotor from the periphery thereof.
SUMMARY OF THE INVENTION
A particular aim of the present invention is to remedy these disadvantages and the present invention proposes a centrifugal action turbine with a structure enabling high efficiency to be achieved.
The centrifugal action turbine in accordance with the present invention comprises an axial fluid supply pipe and an annular bucket rotor disposed concentrically to said pipe, in which centrifugal streams of fluid are formed and deviated with respect to the radial direction, so producing jets of fluid spaced in the peripheral direction which cross the rotor to act on the buckets, causing said rotor to turn.
According to the present invention, said turbine is provided at the end of the supply pipe with a distributor disposed concentrically to said rotor, in which is arranged a great number of convergent channels, each with an inlet oriented towards the fluid supply pipe and an outlet disposed at the periphery of the distributor, in which channels said streams of fluid are formed, said bucket rotor extending to the periphery of the distributor, at a distance from its peripheral surface in such a way that the spaced jets formed fill said rotor axially and the space between the distributor and the rotor is open axially, in order that the jets may be aerated.
According to another object of the present invention, the ratio between the circumferential distance separating two adjacent peripheral outlets of the distributor multiplied by the number of outlets of the distributor and the perimeter of the latter is at least equal to 0.3.
According to another object of the present invention, the peripheral outlets of the distributor are of rectangular cross-section, the ratio between the dimension of these outlets in the direction of the axis of the distributor and their dimension in the peripheral direction being at least equal to 3.
According to another object of the present invention, the cross-section of each channel of the distributor is such that the flow of fluid is convergent from the axial fluid supply pipe to their peripheral outlet. The ratio between their outlet cross-section and the cross-section of the supply channel is preferably less than 0.6.
According to the present invention, the downstream end part of said flow channels of the distributor is preferably of rectangular cross-section.
According to the present invention, the opposite walls of the downstream end part of the flow channels of the distributor, extending along the axis thereof, are preferably parallel.
According to the present invention, the two opposite walls of the downstream end part of the flow channels of the distributor, offset towards the axis of the distributor, are convergent towards their outlet.
According to another object of the present invention, the peripheral part of the flow channels of the distributor at their inlet and in the area in which the streams of fluid are formed and deviated in said channels is formed by a toroidal spiral.
In one embodiment of the present invention said rotor comprises two rings between which its buckets are disposed.
According to the present invention, said rings are preferably disposed so that their facing surfaces converge in the direction from the interior towards the exteri
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Patent Abstracts of Japan, vol. 8, No. 116, (M-299)(1553), 30 May 1984.
& JP, A, 5923087 (Hitachi Seisakusho K.K.) 06 Feb. 1984.
Nguyen Hoang
Price Carl D.
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