| 摘要 |
IN A SCROLL COMPRESSOR, A STATIONARY SCROLL IS PRESSED TOWARD A MOVABLE SCROLL BY A BACK PRESSURE OF A DISCHARGE FLUID COMPRESSED BY A COMPRESSION MECHANISM, AND WEAR POWDER, PRODUCED FROM AN ANNULAR SEAL (WHICH RECEIVES THE PRESSURE OF THE DISCHARGE FLUID) AS A RESULT OF PRECESSION OF THE STATIONARY SCROLL, IS ARRESTED, THEREBY ACHIEVING THE SCROLL COMPRESSOR HIGH IN EFFICIENCY AND RELIABILITY. A PRESSURE-RECEIVING SURFACE FOR RECEIVING A BACK PRESSURE OF THE DISCHARGE FLUID SO AS TO PRESS THE STATIONARY SCROLL TOWARD THE MOVABLE SCROLL IS FORMED ON THAT PORTION OF THE STATIONARY SCROLL DISPOSED AROUND A COMMUNICATION PORT WHICH IS FORMED IN THE STATIONARY SCROLL, AND COMMUNICATES WITH A DISCHARGE PORT. AN ANNULAR SEAL IS PROVIDED TO FORM A SEAL BETWEEN THE STATIONARY SCROLL AND AN UPPER FRAME AROUND A REGION OF COMMUNICATION BETWEEN THE COMMUNICATION PORT AND THE DISCHARGE PORT IN SUCH A MANNER AS TO SATISFY A NECESSARY ANNULAR SEALING SURFACE AREA, AND A CIRCUMFERENTIAL RECESS IS PROVIDED ON THAT SIDE LOWER IN PRESSURE THAN THIS ANNULAR SEAL.(FIG. 4)
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