Bearing seal for water pump
AssigneeNsk Ltd.
InventorsSyuichi Yano, Takeshi Nakamura
Life of this patent
Estimating the term…
Abstract
A bearing seal for a water pump of an automobile has rolling elements between an outer ring fixed to a casing and a rotary shaft that is provided with a drive portion at one end and an impeller at the other end. In addition, a seal is formed between the outer ring and the rotary shaft by an annular seal body fixed to each end of the outer ring. The seal body on at least the impeller end of the rotary shaft is made of hydrogenated nitrile rubber, to achieve a seal body that is inexpensive but does not deform, even when used in a high-temperature environment in contact with cooling water in a long time.
Claims6
A bearing seal for a water pump disposed within a casing, wherein said bearing seal comprises:
- an outer ring formed within said casing;
- a rotary shaft which is equipped with a drive portion at one end portion and an impeller at another end portion, and which is provided in a freely rotatable manner within said outer ring with rolling elements therebetween;
- and
- a seal body affixed to each end of said outer ring in the axial direction;
- wherein at least said seal body on a side close to said impeller is formed of hydrogenated nitrile rubber.
A seal body of a bearing seal for a water pump disposed within a casing, wherein said seal body comprises:
- an outer ring formed within said casing;
- a rotary shaft which is equipped with a drive portion at one end portion and an impeller at another end portion, and which is provided in a freely rotatable manner within said outer ring with rolling elements therebetween;
- and
- a flinger affixed to an impeller-side end portion of said rotary shaft;
- wherein said seal body is affixed to said outer ring and is formed of hydrogenated nitrile rubber.
Dependencies are inferred from the claim text.