SCREW PUMP STATOR THROUGH PASSAGE FORMING METHOD Russian patent published in 2004 - IPC

FIELD: mechanical engineering; pumps with eccentric displacer. SUBSTANCE: method includes forming of elastic material blank in metal sleeve with its installation along axis of cylindrical rod and subsequent extraction and holding until material has shrunk completely. Then channel in blanks is machined by diamond whose diameter is equal to diameter of round section of rotor bringing the wheel to end face of blank. Then pass is made having displaced wheel relative to axis of blank and moving wheel along inner channel of blank at pitch equal to pitch of rotor and simultaneously rotating the blank. Then following passes are made to displace wheel relative to blank axis by 2e, and then passes are made by diamond wheel with displacement of wheel to 2 e from opposite side of blank axis where e is value of eccentricity of center of round cross section of rotor and rotor axis. EFFECT: provision of accurate geometric parameters of stator at reduction of cycle of preparation, improved manufacturability and reduced labor input in process of stator manufacture. 4 dwg