Cooling water pump for ship propelling apparatus |
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| 申请号 | JP13289382 | 申请日 | 1982-07-28 | 公开(公告)号 | JPS5923093A | 公开(公告)日 | 1984-02-06 |
| 申请人 | Yamaha Motor Co Ltd; | 发明人 | KAGAMI MICHIHISA; | ||||
| 摘要 | PURPOSE:To prevent the intrusion of sand or the like to the space between the inner surface of a boss member of an impeller and the outer surface of a driving shaft, by forming a coating of a proper thickness made of a resilient material at least over either one of the inner surface of the boss member or the outer surface of the driving shaft, and thereby facilitating insertion of the boss member onto the driving shaft and eliminating the clearance between them. CONSTITUTION:A coating 63 made of a resilient material such as rubber or a synthetic resin is formed over the outer surface of a driving shaft 39. Here, the thickness of this coating 63 is selected to 0.5mm. in case of using rubber as the material and serveral in case of a synthetic resin so that no clearance exists between the outer surface of the driving shaft 39 and the inner surface of a boss member 59 when the boss member 59 also having a coating 63 made of a similar resilient material is fitted on the driving shaft 39. With such an arrangement, it is enabled to facilitate insertion of the boss member 59 onto the driving shaft 39 and to eliminate clearance between them, so that intrusion of fine particles of mud can be prevented even if muddy water is drawn into the casing. | ||||||
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| 说明书全文 | |||||||
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