VOLUTE PUMP

• Main Authors: SHOJI KENTA, SAKAGAMI HIROMI, ISONO MIHO, OBUCHI SHINJI, UCHIDA HIROSHI, KAWAI MASATO
• Format: Patent
• Language: English; Japanese
• Published: 27.10.2016
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

PROBLEM TO BE SOLVED: To provide a volute pump that can smoothly guide fibrous materials included in liquid to a groove formed in an inner surface of an impeller casing, reliably push the fibrous materials into the groove, and discharge them from a discharge port.SOLUTION: An volute pump according to the present invention comprises: an impeller 1 that rotates integrally with a rotating shaft 11; and an impeller casing 5 that comprises a suction port 3 and a volute chamber 7. A groove 18 that extends from the suction port 3 to the volute chamber 7 is formed in an inner surface of the impeller casing 5. The impeller 1 comprises: a hub 13 to which the rotating shaft 11 is fixed; and sweptback blades 2 that spirally extend from the hub 13. The sweptback blades 2 each comprises: a leading edge part 2a that spirally extends from the hub 13; and a trailing edge part 2b that spirally extends from the leading edge part 2a. The leading edge part 2a comprises a front curved surface 2e formed from an inner end 2c of the leading edge part 2a to an outer end 2d.SELECTED DRAWING: Figure 6 【課題】液体に含まれる繊維状物質を羽根車ケーシングの内面に形成された溝に円滑に導き、かつ繊維状物質を溝に確実に押し込み、吐出口から吐出させることができる渦巻ポンプを提供する。【解決手段】本発明の渦巻ポンプは、回転軸１１と一体に回転する羽根車１と、吸込口３とボリュート室７を有する羽根車ケーシング５と、を備える。羽根車ケーシング５の内面には、吸込口３からボリュート室７まで延びる溝１８が形成される。羽根車１は、回転軸１１が固定されるハブ１３と、ハブ１３から螺旋状に延びる後退翼２とを有する。後退翼２は、ハブ１３から螺旋状に延びる前縁部２ａと、前縁部２ａから螺旋状に延びる後縁部２ｂとを有し、前縁部２ａは、前縁部２ａの内端２ｃから外端２ｄにわたって形成される前側曲面２ｅを有する。【選択図】図６