| 摘要 |
A stator for a progressive cavity pump or motor has a stator housing 100 and a stator insert (110, fig 5) of a material moulded within the housing, the stator housing is formed of an outer tube 120 with at least one recess 140 and a plurality of framework elements 130 disposed on its inner surface. The framework elements and the recess define a plurality of chambers receiving insert material such that it is mechanically fixed axially, radially and torsionally within the outer tube. Preferably the framework is formed of circular or elliptical rods extending either axially or annularly and the recesses may be helical, annular or linear grooves. Also described is a method of assembling a stator which includes locating a mould core within the outer tube and injecting a liquid material between the outer housing and the core so that the material penetrates the chambers. |
