PUMP AND ASSEMBLY METHOD OF THE SAME

• Main Authors: HASHIMOTO YASUSHI, NISHIKAWA MASAHIRO, MASUTANI HIDETOSHI, ARAKI SHINICHIRO
• 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 pump which prevents back flow of water to improve the pump efficiency while facilitating assembly and designing.SOLUTION: A pump includes an impeller (10) and a casing (20) for storing the impeller (10). In the pump, an annular gap (G) is formed between an outer peripheral surface (11a) of a suction port (11) and the casing (20) in the impeller (10). The outer peripheral surface (11a), which is located at the inner side of the annular gap (G) with respect to the casing (20), includes a seal member (30). The seal member (30) is stored so as to move in an axial direction on the outer peripheral surface (11a) between an open state, in which the seal member (30) is separated from the annular gap (G), and a closed state, in which the seal member (30) is moved from the open state to the annular gap (G) side to close the annular gap (G).SELECTED DRAWING: Figure 2 【課題】組立・設計を容易にしながら水の逆流を防止し、ポンプ効率を向上させる。【解決手段】ポンプは、羽根車（１０）と、羽根車（１０）を収容するケーシング（２０）と、を備える。ポンプにおいて、羽根車（１０）における吸込口（１１）の外周面（１１ａ）とケーシング（２０）との間には環状間隙（Ｇ）が形成される。そして、環状間隙（Ｇ）よりケーシング（２０）に対する内側の外周面（１１ａ）において、シール部材（３０）を備え、シール部材（３０）は、外周面（１１ａ）において、シール部材（３０）が環状間隙（Ｇ）と離間した開放状態と、シール部材（３０）が開放状態から環状間隙（Ｇ）側へ移動して環状間隙（Ｇ）を塞ぐ閉鎖状態とに、軸方向に移動可能に収容されている。【選択図】図２