Cooling method and structure for a rotation object
AssigneeNissan Motor Co., Ltd.
InventorsNoboru Hattori, Masakazu Kobayashi
Life of this patent
Estimating the term…
Abstract
A coolant inlet and a coolant outlet are opened on an inner surface enclosing an inner space of a rotation object. The coolant inlet and the coolant outlet are located on a rotation axis and face each other. A main-stream which flows straightly along the rotation axis from the coolant inlet to the coolant outlet is generated in a central space of the inner space. Therefore, a resistance about the coolant stream is small. In addition, a sub-stream which circulates in a radial direction is generated in a peripheral space around the central space. By generating a contact between the main-stream and the sub-stream, it is possible to obtain high performance of cooling.
Claims25
A cooling method for a rotation object having a rotation axis and an inner space, the inner space having a coolant inlet which is located on the rotation axis and a coolant outlet which is located on the rotation axis, the coolant inlet and the coolant outlet facing each other, the cooling method comprising:
- generating a main-stream of the coolant in a central space of the inner space, the main-stream flowing straightly along the rotation axis from the coolant inlet to the coolant outlet;
- generating a sub-stream of the coolant in a peripheral space around the central space, the sub-stream circulating in a radial direction of the inner space;
- and
- generating a contact between the main-stream and the sub-stream, the contact being attended with a mix of the coolant of the main-stream and the coolant of the sub-stream.
A cooling structure for a rotation object having a center portion and two end portions, the center portion and the two end portions being arranged on a rotation axis of the rotation object, the cooling structure comprising:
- an inner surface enclosing an inner space which is inside of the center portion and is filled with coolant;
- an inlet passage being located inside of the one end portion and having a coolant inlet which is opened on the inner surface;
- and
- an outlet passage being located inside of the another end portion and having a coolant outlet which is opened on the inner surface;
- wherein the coolant inlet and the coolant outlet are located on the rotation axis and facing each other, so that a central space which is defined as a space between the coolant inlet and the coolant outlet and a peripheral space which is defined as a space around the central space are formed in the inner space.
A cooling structure for a rotation object having a rotation axis and an inner space, the inner space having a coolant inlet which is located on the rotation axis and a coolant outlet which is located on the rotation axis, the coolant inlet and the coolant outlet facing each other, the cooling structure comprising:
- means for generating a main-stream of the coolant in a central space of the inner space, the main-stream flowing straightly along the rotation axis from the coolant inlet to the coolant outlet;
- means for generating a sub-stream of the coolant in a peripheral space around the central space, the sub-stream circulating in a radial direction of the inner space;
- and
- means for generating a contact between the main-stream and the sub-stream, the contact being attended with a mix of the coolant of the main-stream and the coolant of the sub-stream.
Dependencies are inferred from the claim text.