Electric supercharger and supercharging system
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorsMakio Oshita, Toshihiro Yamamichi, Kiyoshi Uetsuji, Satoshi Umemura
Life of this patent
Estimating the term…
Abstract
An electric supercharger that can reduce vibration amplitude in an end of a shaft due to rotational vibration is provided. An electric supercharger 101 comprises: an impeller 40 for supercharging a fluid by rotation; an impeller chamber 15 for accommodating the impeller 40; a motor 30 for driving the impeller 40 to rotate; and a motor chamber 18 for accommodating the motor 30. An opening 28 is provided between the impeller chamber 15 and the motor chamber 18 wherein the fluid is able to pass therethrough. Seal structures 50, 51, 52 are provided for separating the motor chamber 18 from the exterior at portions other than the opening 28.
Claims7
An electric supercharger comprising:
- an impeller for supercharging a fluid by rotation;
- an impeller chamber for accommodating the impeller;
- a motor for driving the impeller to rotate;
- a motor chamber for accommodating the motor;
- a rotating shaft which is common between the impeller and the electric motor;
- an opening for connecting the impeller chamber and the motor chamber, through which the rotating shaft that extends from the impeller chamber to the motor chamber passes, and through which the fluid is able to pass between the impeller chamber and the motor chamber;
- and
- a seal structure for separating the motor chamber from an exterior at portions other than the opening such that the fluid within the motor chamber does not leak out of the motor chamber at portions other than the opening, wherein:
- the seal structure includes a seal plate,
- the impeller chamber is formed by a compressor cover and the seal plate assembled to the compressor cover,
- the electric supercharger has a motor case, the motor case being fixed to the seal plate, the motor case accommodating the motor, and
- the seal plate is directly exposed to outside of the electric supercharger, wherein the seal plate has a larger outer diameter than both of the compressor cover and the motor case, so that the compressor cover and the motor case do not directly contact each other,
- wherein:
- the opening has a plate through hole formed in the seal plate and a motor case through hole formed in the motor case so as to be adjacent to the plate through hole and connected to the plate through hole;
- the seal structure has a first seal member disposed between and in direct contact with the seal plate and the motor case at a location radially outward from the opening, that separates the motor chamber from the exterior of the motor case and wherein the first seal member is an O-ring;
- and
- the opening is not provided with any seal structure for separating the impeller chamber from the motor chamber.
Dependencies are inferred from the claim text.