Rotary piston machine
OwnerFelix Wankelinventor
Life of this patent
Estimating the term…
Abstract
A rotary piston machine, in order to avoid losses due to compressed flows, has adjacent to a generating and/or sealing contact edge (21, 22) at least one recess (11a, 11e) and/or opening (12a, 12b) which extends beyond the contact curve (14a-14c) in at least approximately the direction of motion of the surfaces moving in relation to each other during the stroke or passage of the piston (6a") through the shut-off driver. The spatial dimensions of the recesses and/or opening are such that the flow in it is not substantially accelerated even when the direction is changed. An opening (11g, 11g') can be closed insofar as it is located in a nonmoving ring (6b). To prevent low pressures between surfaces moving away from each other (9c, 14c) a pressure compensation space (11e) is connected to the contact line (14c) of one of the surfaces.
Claims8
A rotary piston engine comprising:
- a piston rotor including piston means forming at least one piston member on said piston rotor;
- a sealing rotor shaped to define primary recess means forming at least one primary recess through which said piston means pass during relative rotation between said sealing rotor and said piston rotor;
- said sealing rotor and said piston rotor being mounted for intermeshing relative rotation therebetween about parallel rotative axes;
- a meshing line defined as a locus of points taken relative to said sealing rotor which said piston means follows during movement thereof through said primary recess means;
- housing means defining a fluid flow-path for a flowable medium enveloping said rotors;
- said sealing rotor having a cylindrical outer surface interrupted by said primary recess means, said primary recess means being defined with terminal edges contiguous with said cylindrical outer surface and extending as uninterrupted straight lines parallel with each other along said cylindrical outer surface;
- and
- secondary recess means forming at least one secondary recess directly contiguous with said primary recess means along said meshing line so as to extend said primary recess means beyond said meshing line to avoid losses due to compressed flows by compression of fluid within said primary recess means by the relative movement between surfaces of said piston means and said sealing rotor, said secondary recess means commencing from a point spaced from said terminal edges of said primary recess means and being located radially inwardly relative to said cylindrical outer surface.
In a rotary piston engine comprising a piston rotor and a sealing rotor which rotate about axes of rotation disposed in fixed relation;
- said piston rotor including a piston mounted on a rotatable shaft;
- said sealing rotor having a primary recess for passage therethrough of said piston;
- said sealing rotor and said piston rotor generating a meshing line which constitutes the locus of points which the piston follows relative to the sealing rotor as said piston moves through said primary recess;
- a common housing having an inlet for a flowable medium enveloping said rotors;
- said piston rotor shaft being hollow and having a first radially-extending passageway for a flowable medium;
- a control sleeve for controlling the passage of a flowable medium through said hollow shaft, which sleeve surrounds said hollow shaft;
- said rotor being rotatable relative to said sleeve;
- said sleeve having a second radially extending passageway;
- said radially extending passageways being intermittently superposed in the course of rotation of said piston rotor;
- the improvement comprising a secondary recess connected with said primary recess which extends beyond the meshing line in at least the approximate direction of motion of the rotor surfaces generating said meshing line, and which secondary recess is adjacent and contiguous with said primary recess;
- wherein a leading surface of said piston in the direction of rotation has an undercut surface, and said sealing rotor has a sealing contact edge which engages said undercut surface;
- said control sleeve maintaining the radially extending passageway of said hollow piston rotor shaft open until said contact edge disengages from the piston;
- the inner end limit of the undercut surface terminating at the edge of the radially extending passageway in the hollow shaft for said piston.
Dependencies are inferred from the claim text.