| 摘要 |
A screw pump includes a screw rotatably arranged in a housing, the threads of which are partially in engagement with a rotatable sealing device having radial sealing discs, whereby the screw area of the screw, including thread grooves and thread walls, are formed by a generatrix which is a part of a circle arc, the circle of which is rotatable around an eccentric rotation axis when the generatrix rotates around the axis of the screw and is displaced along this with a velocity being proportional to the rotational velocity of the screw. The sealing device includes at least one circular disc, the eccentric rotational axis of which, which is arranged transverse to the axis of the screw coincides with the rotation axis of the generatrix i.e., the rotation axis of the disc is a tangent to the generatrix, whereby the screw is mounted in one end and has a radially, partially extending broad flange without any rise in a cross section immediately above the sealing device. |
