Hydraulic roller motor

摘要: A positive displacement, constant speed, pressure sealing, wear compensating, hydraulic motor for driving a rock drill, comprising an exernally cylindrical rotor mounted axial rotation in internally housing and connectible to drill bit transmit torque thereto, plurality of members the form rollers respective axially extending recesses surface said rotor, being floated by fluid flow only without aid mechanical springs, into sealing engagement with housing, at least two circumferentially wall adapted receive succession during rotor; each recess having spaced inlet outlet means drilling mud impingement on drive rotor.