| 摘要 |
PURPOSE:To enable the high-pressure force feed of fluid to be securely carried out by bringing turning shafts on each of which a single-threaded spiral groove is formed into contact with each other and dividing the part where the spiral grooves are in contact with each other by a spherical body. CONSTITUTION:Turning shafts 1 and 2 on each of which a single-threaded spiral groove is formed are supported so as to be in contact with each other, and a part of casing C is projected in the clearance generated between the upper and lower side of the contact part. In the part where grooves 16 and 26 of both turning shafts 1 and 2 are in contact, a spherical body 5 is arranged so as to be held between the projections of the casing C. The spherical body 5 moves in the axial direction from the beginning end 16a and 26a toward the ending end 16b and 26b of the grooves 16 and 26 with the rotation of both turning shafts 1 and 2. Thus, the space of spiral grooves whose both sides in the axial direction are sealed by the spherical body 5 also moves in the axial direction, and the fluid taken in is fed forcibly to be discharged from a discharge port 71.
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