Rotary machine

A rotor A for use in a rotary machine in cooperation with an identical rotor B, rotors A and B having respective centers of rotation PA and PB, wherein said rotor A is adjacent and in parallel orientation to rotor B and includes:

• a) a pair of parallel side surfaces spaced apart by the thickness of said rotor;
• and
• b) a curved perimeter surface formed between said pair of parallel side surfaces, formed of a plurality of curved portions JK, Ke′, e′L, LM, Me″, and e″J, each said curved portion being contiguous with and mutually tangential with a pair of said curved portions, and wherein
• 1) said curved portion JK is a first major segment S1 defining a first major arc A1 subtending an angle α at the center of rotation PA, and having a first radius R1;
• and
• 2) said curved portion LM is a first minor segment S2 defining a first minor arc A2 subtending the angle α at the center of rotation PA, and having a second radius R2, shorter than the first radius R1, said rotor having an axis of symmetry bisecting said major and minor segments S1 and S2, and wherein R1+R2 equals the height of said rotor measured along its axis of symmetry, which equals the distance D between the centers of rotation PA and PB;
• 3) said curved portions e′L and Me″ are major arcs each having a radius R extending from origins O2 and O1, respectively;
• 4) said curved portions Ke′ and e″J are minor arcs each having a radius r extending from origins O1 and O2, respectively;
• wherein, when said rotor A is adjacent and in parallel orientation to rotor B and such that the distance between the centers of rotation PA and PB=D, origins O1 and O2 are respectively located at the intersection points of the line EE which is parallel to a line extending through the centers of rotation PA and PB;
• and
• 5) wherein the distance of the line EE from the line PAPB is determined by positioning said line EE at a point D′ located along a perpendicular bisector VV of line PAPB at a point D′, the location of point D′ being determined by bisecting the angle between PAPB and PAJ so as to obtain the line PAC, and extending a normal from point J to the line PAC, and extending it so as to intersect the line VV at the point D′.

An improved rotary machine which includes:

• a housing having formed therein a generally elongate cavity, said cavity being formed by a pair of adjoining, partially overlapping cylindrical bores, each said bore being separated from an adjoining bore by a pair of non-joining partition walls;
• a pair of non-cylindrical rotors arranged in said pair of adjoining bores, each said rotor having a curved outer surface formed of a plurality of contiguous mutually tangential curved portions, wherein each said rotor is disposed in one of said bores for synchronized, non-touching and same-directional rotation with the other of said pair of rotors;
• a pair of rotor shafts associated with each said pair of rotors, each said rotor shaft extending through one of said bores, and mounted transversely to each said rotor so as to provide eccentric rotation thereof in said bore;
• a gear assembly and a driver associated with said rotor shafts, said assembly and said driver, cooperating to provide synchronized same directional rotation of said rotor shafts;
• and
• a plurality of gas ports formed in said housing and communicating with said elongate cavity thereof, for permitting selectable intake and exhaust of working gases,
• wherein, introduction of a working gas into interactive association with said rotors causes rotation of said pair of rotors and thus also of said driver,
• wherein each said bore has a geometric center, and each said rotor is mounted for rotation about a rotation axis spaced from said geometric center by a predetermined eccentricity;
• each said cavity is bounded by a pair of parallel wall surfaces transverse to said rotation axis;
• said plurality of gas ports includes at least a pair of gas ports provided in communication with each said bore, wherein a first of said gas ports is arranged at a first radius from said geometric center and a second of said gas ports is arranged at a second radius from said geometric center, wherein said second radius has a magnitude smaller than that of said first radius;
• and
• wherein each said rotor is operative to rotate within one of said bores so as to periodically uncover said first port, thereby to enable a flow therethrough of a working gas
• and wherein each said rotor has a pair of flat, parallel surfaces disposed in dynamic, non-touching, sealing relation with said pair of parallel wall surfaces of each said cavity, and each said rotor has formed therein a throughflow portion which is formed so as to be brought periodically into communicative association with the interior of said cavity and with said second gas port, so as to facilitate gas communication therebetween.

A method of constructing a rotor A for use in a rotary machine in cooperation with an identical rotor B, rotors A and B having respective centers of rotation PA and PB, wherein rotor A is adjacent and in parallel orientation to rotor B and includes:

• a) providing a pair of parallel side surfaces spaced, thereby to define a thickness of the rotor;
• and
• b) forming between said pair of parallel side surfaces a curved perimeter surface which includes a plurality of curved portions JK, Ke′, e′L, LM, Me″, and e″J, each said curved portion being contiguous with and mutually tangential with a pair of said curved portions, and including the following sub-steps:
• forming said curved portion JK as a first major segment S1 which defines a first major arc A1 subtending an angle α at the center of rotation PA, and so as to have a first radius R1;
• and
• forming said curved portion LM as a first minor segment S2 which defines a first minor arc A2 subtending the angle α at the center of rotation PA, and so as to have a second radius R2, shorter than the first radius R1, and such that the rotor has an axis of symmetry bisecting said major and minor segments S1 and S2, and wherein R1+R2=D which equals the height of said rotor measured along its axis of symmetry, and the distance between the centers of rotation PA and PB when rotors A and B are arranged in adjacent positions;
• bisecting the angle between PAPB and PAJ so as to obtain the line PAC;
• extending a normal from point J to the line PAC, such that it intersects with a perpendicular bisector VV of line PAPB at a point D′;
• extending a line EE through point D′ parallel to the line PAPB such that said line EE intersects with lines KM and JL respectively, at respective origin points O1 and O2;
• extending radii R and r from each of origin points O1 and O2;
• forming said curved portions e′L and Me″ as major arcs each having a radius R extending from origins O1 and O1, respectively;
• and
• forming said curved portions Ke′ and e″J as minor arcs each having a radius r extending from origins O1 and O2, respectively;
• wherein, when said rotor A is adjacent and in parallel orientation to rotor B and such that the distance between the centers of rotation PA and PB=D,
• wherein said curved portions e′L and Ke′ intersect with line EE at point e′, so as to be contiguous and mutually tangential thereat, and the curved portions Me″ and e″J intersect with line EE at point e″, so as to be contiguous and mutually tangential thereat.