| 摘要 |
<p>A stator (100) for a progressive cavity pump or motor, comprises a stator housing and a stator thread made of a material moulded within the housing. The stator housing (120) is an outer tube (120) and an inner anchor element (110) within. It has radially disposed apertures (130) and is spaced from outer tube so that the material of the thread can be moulded through the apertures to mechanically locate the thread in the housing. To fix the inner anchor element in the outer tube, the axial end faces of the inner anchor element each have a first set (112) of protrusions and indentations around the circumference thereof. Two end caps (140) of the housing are fixed at the end faces of the outer tube. Each end cap is provided with an interconnecting part having a second set (142) of protrusions and indentations. The first and second sets of protrusions and indentations interengage to mechanically fix the inner anchor element axially and radially within the outer tube.</p> |
