PUMP AND METHOD OF ASSEMBLING PUMP

To provide a pump capable of preventing a retainer from being sandwiched between an impeller and a step portion of a rotary shaft when assembling the pump.SOLUTION: A pump P is equipped with a retainer 41 that is held by a spring 33 pressing a rotation ring 31 of a mechanical seal 20 to a stationary...

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Bibliographic Details
Main Authors MIYA KENTA, KAWABATA JUNYA
Format Patent
LanguageEnglish
Japanese
Published 07.05.2024
Subjects
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT PUMPS
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
WEAPONS
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Summary:To provide a pump capable of preventing a retainer from being sandwiched between an impeller and a step portion of a rotary shaft when assembling the pump.SOLUTION: A pump P is equipped with a retainer 41 that is held by a spring 33 pressing a rotation ring 31 of a mechanical seal 20 to a stationary ring 32, and a retainer holder 50 attached to a back side of an impeller 2. the retainer holder 50 has a peripheral wall 52 in which the retainer 41 is fitted inside, and a bottom wall 53 extending inward in a radial direction from the peripheral wall 52. The peripheral wall 52 projects out toward the mechanical seal 20 from the bottom wall 53. The peripheral wall 52 has a tapered surface 54 formed at an edge portion thereof, and the tapered surface 54 has a conical shape increasing an inner diameter of the peripheral wall 52 with a distance from the bottom wall 53.SELECTED DRAWING: Figure 2 【課題】ポンプを組み立てるときに、リテーナが羽根車と回転軸の段部との間に挟まれることを防ぐことができるポンプを提供する。【解決手段】ポンプＰは、メカニカルシール２０の回転リング３１を静止リング３２に押し付けるばね３３に保持されたリテーナ４１と、羽根車２の裏側に取り付けられたリテーナホルダ５０を備える。リテーナホルダ５０は、リテーナ４１が内側に嵌合される周壁５２と、周壁５２から半径方向内側に延びる底壁５３を有する。周壁５２は、底壁５３からメカニカルシール２０に向かって突出している。周壁５２は、その縁部に形成されたテーパー面５４を有しており、テーパー面５４は、底壁５３からの距離とともに周壁５２の内径が大きくなる円錐台形状を有している。【選択図】図２
Bibliography:Application Number: JP20220168461