RADIAL SUPPORT OF FACE MOTOR Russian patent published in 2000 - IPC

FIELD: mining industry. SUBSTANCE: invention refers to drilling hydraulic face motors, specifically, to their supporting units located in motor and spindle sections. In addition to customary bushings of frame and shaft given support has intermediate yoke coaxial to them and attached to one of bushings by means of intermediate restoring member mounted for elastic misalignment and radial displacement of yoke. In this case working pair of friction surfaces is formed by interacting surfaces of second bushing and yoke. Restoring member can come in the form of cylindrical spacer made of elastomer, elastomer rings or set of axially symmetric metal springs of radial action for use in high-temperature holes. Radial support can be fitted with safeguarding discs installed flush with one or both butts of bushing fastened to yoke which limit axial displacement of yoke. EFFECT: increased functional reliability, prolonged service life of radial support and imparting it with properties of effective slit sealing. 7 cl, 3 dwg