| 摘要 |
<p>A rotary engine having grooves (7) in those inner surfaces of a seal recess (4) in a rotor (11) which are opposed to the side surfaces of an apex seal member (3), and a plurality of elongated rollers (8) rollably housed in these grooves (7). These rollers (8) can be brought into roll-contact with the apex seal member (3) when said member (3) is moved in the radial direction shown by an arrow (14). Accordingly, even when this member (3) is pressed against the inner surface (6b) of the seal recess (4) by a high combustion gas pressure P1, the member (3) is rendered smoothly movable in the radial direction. In order to reliably introduce the gas pressure P1 into a chamber (19) in the seal recess (4), grooves may be formed in the outer circumferential surfaces of the lower rollers, or recesses communicating with the chamber (19) in the seal recess (4) may be formed in the bottom portions of the grooves (7) supporting the rollers (8). A recess (9) extending in the axial direction of the rotor (11) is formed in the apex portion of an arcuate section of a top surface (28) of the apex seal member (3) so as to reduce a force for pressing down the apex seal member (3) toward a bottom surface (15) of the seal recess (4).</p> |
