Patent ID: 6227832
Filing Date: 2001-05-08
Classification: F01C

Abstract:
Rotary piston machine in which at least one rotor (19, 22) rotates in an enclosure (32), and radially movable slides (1, 21) in the rotor form chambers of varying volume between the enclosure and the rotor, wherein an even number of slides is provided and mutually opposing slides are joined together in a rigid unit, characterized in that the rotor is arranged eccentrically in the enclosure, in that the enclosure is symmetrical with respect to the connection line between the axis of the rotor and the point of the enclosure closest to this axis, the south pole (S) and in that, based on an XY coordinate system placed through the axis of rotation of the rotor and running orthogonally to and in the direction of the axis of symmetry, and on polar coordinates (r, j) with their center in the rotor shaft and the angle j=0 lying in the direction of the positive X-axis, the inside wall of the enclosure (32) satisfies the following equation:r.sub.(j) ={a>>b>>/[a>> cos >>(1(j+D/2))+b>> sin >>(1(j+D/2))]}.sup.1/2where:b is the shortest distance between the rotor shaft and the enclosure wall at the south pole (S),a is given by the formulaa.sub.(d,b) ={[3(d/2).sup.4 -2b>>(d/2)>>]/[2(d/2)>>-b>>]}.sup.1/2where:d is the length of the chords of the inside enclosure wall through the axis of rotation of the rotor, thus, the radial extension of the slides (1, 21), and 1 is given by the formula1=2/D arccos ({[a>>-(a.sup.4 +b.sup.4 -a>>b>>).sup.1/2 ]/(a>>-b>>)}.sup.1/2).