METHOD OF REPAIRING BLADE OF SCREW PUMP

• Main Authors: SAKAI MASANORI, MORISATO TETSUYA, HAYASHI HIROTAKA, ARASUNA RITSUO, MATSUOKA TOSHINORI
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

PROBLEM TO BE SOLVED: To provide a method of repairing a blade of a screw pump that can easily maintain the axis and rotation balance of a screw blade.SOLUTION: The method comprises: a screw shaft supporting step for rotatably supporting a horizontally placed screw shaft 6 at both ends thereof; a blade cutting step for cutting and removing at least a tip part of a screw blade 7 by a cutter 46 while rotating the both-end supported screw shaft 6 about the axis thereof and while the cutter 46 is running on a rail 45 arranged parallel to the longitudinal direction of the screw shaft 6; a blade new part attaching step for welding a newly produced blade tip part 12 (blade new part) to the cut part of the screw blade 7; and a blade outer diameter adjusting step for cutting and processing the welded blade tip part 12 by the cutter 46 so that the outer diameter becomes a prescribed dimension, while rotating the both-end supported screw shaft 6 about the axis thereof and while the cutter 46 is running on the rail 45.SELECTED DRAWING: Figure 3 【課題】スクリュー羽根の軸芯および回転バランスを維持しやすいスクリューポンプの羽根の補修方法を提供すること。【解決手段】横にされたスクリュー軸６をその両端支持で回転可能に支持するスクリュー軸支持工程と、両端支持されたスクリュー軸６をその軸芯回りに回転させながら、且つスクリュー軸６の長手方向に対して平行に配置されたレール４５の上を切断機４６を走行させながら、スクリュー羽根７の少なくとも先端部を切断機４６にて切断除去する羽根切断工程と、スクリュー羽根７の切断部に、新規に製作した羽根先端部１２（羽根新規部）を溶接する羽根新規部取付工程と、両端支持されたスクリュー軸６をその軸芯回りに回転させながら、且つレール４５の上を切断機４６を走行させながら、溶接された羽根先端部１２をその外径寸法が所定の寸法となるように切断機４６にて切断加工する羽根外径調整工程と、を備える。【選択図】図３