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An external axis rotary piston compressor having a housing formed with at least two overlapping, parallel-axis cylindrical inner chambers each having a shaft passing therethrough. On the one shaft there is a cylindrical working rotor forming an annular working chamber with the housing wall surroundi

An external axis rotary piston compressor having a housing formed with at least two overlapping, parallel-axis cylindrical inner chambers each having a shaft passing therethrough. On the one shaft there is a cylindrical working rotor forming an annular working chamber with the housing wall surrounding the same, and including a shutoff tooth or projection. On the other shaft, which rotates counter thereto, there is provided a cylindrical shutoff rotor which runs along the housing wall and rides on the working rotor; this shutoff rotor includes a recess for engagement-free passage of the shutoff tooth or projection therethrough. The body of the working rotor is a hollow cylinder; when the hollow cylinder rotates, a port or control opening provided in the shutoff tooth or projection coincides with a further port or control opening located in a stationary sleeve arranged in the hollow cylinder, which is mounted in a first side part of the housing and is rigidly and coaxially connected with the drive shaft mounted in the other side part. An inlet opening is provided for the working gas into the suction chamber in the rearward side of the hollow shut-off tooth or projection as seen in the direction of rotation of the working rotor. An outlet passage extending essentially tangential to the direction of movement of the working rotor conveys working gas.

대표청구항 ▼

An external axis rotary pistion compressor comprising: a housing having a first and second side part, and at least two overlapping, parallel-axis, cylindrical inner chambers, each having a respective shaft passing therethrough, said housing further being provided with an outlet passage, from said in

An external axis rotary pistion compressor comprising: a housing having a first and second side part, and at least two overlapping, parallel-axis, cylindrical inner chambers, each having a respective shaft passing therethrough, said housing further being provided with an outlet passage, from said inner chambers, for conveyed working gas; a cylindrical working rotor arranged on one of said shafts, which is associated with a drive shaft journalled in said second side part, with said outlet passage in said housing essentially extending tangential to the direction of movement of said working rotor; the body of said working rotor being a hollow cylinder mounted in said first side part and rigidly and coaxially connected with said drive shaft, said hollow cylinder being provided with a hollow shutoff projection which projects radially outwardly therefrom, said hollow cylinder being further provided with a first port which communicates the hollow interior of said hollow cylinder with the hollow interior of said shutoff projection; said working rotor forming an annular working chamber with that portion of said housing which surrounds it, said working chamber, when viewed in the direction of rotation of said working rotor, including a suction chamber behind said shutoff projection, with said shutoff projection being provided on its rear side with an inlet opening, into said suction chamber, for working gas; a cylindrical shutoff rotor arranged on the other of said shafts, which turns in the opposite direction to the one of said shafts, said shutoff rotor running along the associated portion of said housing, and riding on said working rotor; said shutoff rotor being provided with a recess for passage of said shutoff projection therethrough without contacting said shutoff rotor; and a stationary sleeve fixed to said first side part and arranged in said hollow cylinder in such a way as to be sealingly surrounded thereby, said sleeve being provided with a second port which is adapted to coincide with said first port of said hollow cylinder when the latter rotates, said sleeve having an inner chamber which forms an inlet passage for drawn-in working gas, said first side part including an outer flange in which an inner bearing is mounted, said hollow cylinder being journalled in said inner bearing; said outer flange being provided with a central opening, and a plurality of lateral openings surrounding this central opening, for drawn-in working gas, said lateral openings being separated by said inner bearing and webs which support said sleeve; in which said hollow cylinder is provided with openings; and in which an annular chamber which surrounds said inner bearing is formed in said first side part, said lateral openings communicating with said openings, and thus with the hollow interior of said hollow cylinder, by means of said annular chamber.