Rotary expansible chamber devices – Rotating internal member rotates and oscillates or reciprocates
Patent
1991-01-14
1992-12-15
Bertsch, Richard A.
Rotary expansible chamber devices
Rotating internal member rotates and oscillates or reciprocates
F04C 300
Patent
active
051711427
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to the mechanical engineering, and more specifically, it deals with a rotary expansion machine.
The invention may be used as a motor or pump in various power producing or power consuming plants.
BACKGROUND OF THE INVENTION
Known in the art is a hydraulic vane machine (SU, A, 819363), comprising a casing accommodating a rotor having a cam-shaped end face and a shaft. The casing has slots receiving radially extending vanes mounted for axial movement under the action of springs. During rotation of the rotor by a drive motor, the vanes which are permanently pressed against the cam end face of the rotor reciprocate to ensure regular variation of capacity of pressure and suction working chambers. The vanes divide these chambers, and the volumetric efficiency, which is the ratio of the volume of utilized fluid to the maximum volume of the working chamber, depends on quality of sealing between the end faces of the vanes and the cam end face of the rotor. It is defficult to provide an efficient sealing member on the narrow end face of the vane. Accordingly, the volumetric efficiency of the machine is rather low.
Also known in the art is a rotary displacement pump (SU, A, 877129) having a casing with an inner spherical surface mating with the outer surface of vanes having power take off shafts provided thereon to extend along their axes of summetry at an angle with respect to each other.
There is also provided a partition extending in the diametrical plane having its outer surface mating with the inner surface of the casing. Vane supports and a sealing member received in a groove are provided in the diametrical plane of the partition. This machine has an increased volumetric efficiency because of an increase in the useful volume of the working chambers with the same inside diameter of the casing. However, the provision of a sealing member that takes a part of the useful space of the working chambers lowers the possibility of increasing the volumetric efficiency. In addition, the sealing line in the diametrical plane is long and very sinuous so that is very difficult to ensure a reliable sealing.
SUMMARY OF THE INVENTION
The invention is based on the problem of providing a rotary displacement machine in which, owing to an increase in useful volume of working chambers and reduction of length of a line along which surfaces of the vanes, partitions and inner surface of a spherical casing mate with one another, an increase in the volumettic efficiency is achieved.
The invention resides in the fact that a rotary displacement machine having a casing with a spherical interior space accommodating a rotor formed by a disc-shaped partition mounted for rotation about the center of the spherical interior space and defining a pair of mutually isolated compartments, and by a pair of vanes pivotally connected to the partition to extend on either side thereof in two mutually perpendicular diametrical planes defining with the partition and with the inner surface of the casing sealed varying-capacity working chambers, each vane being rigidly secured to a respective power takeoff shaft, the axes of the shafts extending at an angle with respect to each other and intersecting each other at the center of the spherical interior space, according to the invention, the discshaped partition is continuous, and its pivotal connection to each vane comprises a diametrically extending cylindrical projection of the discshaped partition and a recess of a mating configuration provided on the end portion of the vane mating with each other, the axes of the cylindrical projections on either side of the partition extending in one and the same plane.
The provision of the cylindrical projections on the side faces of the partition having their axes extending in one and the same plane and intersecting at right angle with respect to each other at the center of the partition and the provision of mating recesses on the end faces of the vanes make it possible, owing to their conjugation with the surfaces of the cylindr
REFERENCES:
patent: 3816039 (1974-06-01), Berry
patent: 3877850 (1975-04-01), Berry
patent: 4631011 (1986-12-01), Whitfield
Bertsch Richard A.
Cavanaugh David L.
Tselevoi Nauchno-Tekhnichesky Kooperativ "Stimer"
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