SUBMERGED SCREW PUMP SURFACE DRIVE Russian patent published in 2001 - IPC

FIELD: oil producing industry; mechanical engineering; pumps. SUBSTANCE: proposed drive has motor, reduction gear, torque transmission mechanical train made in form of variable-speed drive. Pulley of variable- speed drive has two conical disks with guide ribs on disk surfaces for engagement at axial displacement and radial locking. Disks are provided with thread of different sense but equal pitch. Disks are installed on reduction gear shaft on splines for axial displacement. Pins of end face nut lock are spring-loaded and installed on shaft of reduction gear in specially made slots. Threads of end face nut correspond to threads of conical disks. EFFECT: simplified design of surface drive, improved reliability and provision of possibility of stepless control of submerged screw pump speed. 2 dwg