Pressure equalization device for an electric machine, housing, electric machine and motor vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorSebastian Kneissl
Life of this patent
Estimating the term…
Abstract
A pressure equalization device has three backflow preventers, in particular check valves, wherein an outflow side of the first backflow preventer is fluidically connected to an inflow side of the second backflow preventer and is also designed to be fluidically connected to an air chamber of the casing. An outflow side of the second backflow preventer is connected to an inflow side of the third backflow preventer and is also designed to be fluidically connected to a fluid chamber of the casing. The chambers are fluidically sealed off from each other by means of a radial shaft seal.
Claims12
A pressure equalization device for an electric machine having a housing, the pressure equalization device comprising:
- a first backflow preventer;
- a second backflow preventer;
- and
- a third backflow preventer,
- wherein an outflow side of the first backflow preventer is fluidically connected to an inflow side of the second backflow preventer, and is also configured to be fluidically connected to an air chamber of the housing, and
- wherein an outflow side of the second backflow preventer is connected to an inflow side of the third backflow preventer, and is also configured to be fluidically connected to a liquid chamber of the housing, which is fluidically sealed off from the air chamber by a radial shaft seal.
A housing for an electric machine, comprising:
- an air chamber;
- a liquid chamber;
- and
- a pressure equalization device comprising:
- a first backflow preventer;
- a second backflow preventer;
- and
- a third backflow preventer,
- wherein an outflow side of the first backflow preventer is fluidically connected to an inflow side of the second backflow preventer, and is also configured to be fluidically connected to the air chamber, and
- wherein an outflow side of the second backflow preventer is connected to an inflow side of the third backflow preventer, and is also configured to be fluidically connected to the liquid chamber,
- wherein the air chamber and the liquid chamber are fluidically connected to one another by an opening, and the air chamber and the liquid chamber are fluidically sealed off from one another at the opening in response to a radial shaft seal being inserted into the opening and a shaft of the electric machine extending through the radial shaft seal.
Dependencies are inferred from the claim text.