STATOR OF SCREW GEROTOR HYDRAULIC MACHINE Russian patent published in 2006 - IPC F04C2/107 F01C1/107 E21B4/02 

FIELD: oil and gas producing industries.

SUBSTANCE: invention relates to gerotor mechanisms of screw downhole motors for drilling oil and gas wells, to screw pumps for producing of oil and transfer of liquids and screw hydraulic motors of genera application. Proposed stator of screw gerotor hydraulic machine contains hollow housing, stator sleeve installed in housing to form, together with housing, a ring space isolated from surrounding medium. Lining with helical teeth made of elastic material is secured in sleeve. Housing is made sectional, consisting of stator section and, at least, two tubular sections connected with sleeve made in form of tubular envelope with outer and inner helical teeth fastened by each edge, for instance, end face, with two edges, for instance, end faces of stator and tubular sections of housing by means of girth weld. Lining provided with outer screw surface is attached to internal helical teeth of tubular envelope. Ring space between outer helical teeth of tubular envelope and stator section of hollow housing is filled up with solid and/or elastic material and/or liquid and/or gas.

EFFECT: improved power characteristics and reliability, increased service life, reduced rate of rotor speed drop at increase of torque.

5 cl, 3 dwg