| 摘要 |
A rotary device (30) has a first rotor (3) having a recess (4) and a second rotor (5) counter-rotatable to said first rotor (3) and having a radial lobe (6). A housing (20) in which the rotors (3, 5) are enclosed has a first arcuate recess (21), an edge (42) of the recess (4) of the first rotor (3) forming a sliding seal with the first arcuate recess (21) during a portion of the rotation of the first rotor (3). The housing (20) has a second arcuate recess (22), the lobe (6) of the second rotor (5) forming a sliding seal with the second arcuate recess (22) during a portion of the rotation of the first rotor (3). Thus, for a portion of the rotation of the rotors (3, 5), there is defined betwen the first and second rotors (3, 5) and the arcuate recesses (21, 22) of the housing (20) a transient chamber (23) of volume which progressively decreases on rotation of the rotors (3, 5). The maximum volume of the transient chamber (23) can be varied.
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