Centrifugal compressor and turbocharger
AssigneeMitsubishi Heavy Industries Engine & Turbocharger, Ltd.
InventorsKenichiro Iwakiri, Yutaka Fujita, Yoshihiro Hayashi
Life of this patent
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Abstract
A centrifugal compressor includes: an impeller; a compressor inlet tube configured to guide air to the impeller; a scroll flow passage disposed on a radially outer side of the impeller; a bypass flow passage branching from the scroll flow passage via a branch port, the bypass flow passage connecting to the compressor inlet tube not via the impeller; and a bypass valve capable of opening and closing a valve port disposed in the bypass flow passage. The branch port has a non-circular shape when viewed along a normal N1 of the branch port passing through a center of the branch port.
Claims16
A centrifugal compressor, comprising:
- an impeller;
- a compressor inlet tube configured to guide air to the impeller;
- a scroll flow passage disposed on a radially outer side of the impeller;
- a bypass flow passage branching from the scroll flow passage via a branch port, the bypass flow passage connecting to the compressor inlet tube not via the impeller;
- and
- a bypass valve capable of opening and closing a valve port disposed in the bypass flow passage,
- wherein the branch port has a non-circular shape when viewed along a normal N1 of the branch port passing through a center of the branch port,
- wherein, when G is a flow-passage cross section including the center of the branch port in the scroll flow passage, T is a dimension of the branch port in a flow direction F of the scroll flow passage orthogonal to the flow-passage cross section G, and L is a dimension of the branch port in a flow direction H orthogonal to each of the flow direction F and the normal N1, T is smaller than L.
A centrifugal compressor, comprising:
- an impeller;
- a compressor inlet tube configured to guide air to the impeller;
- a scroll flow passage disposed on a radially outer side of the impeller;
- a bypass flow passage branching from the scroll flow passage via a branch port, the bypass flow passage connecting to the compressor inlet tube not via the impeller;
- and
- a bypass valve capable of opening and closing a valve port disposed in the bypass flow passage,
- wherein the branch port has a non-circular shape when viewed along a normal N1 of the branch port passing through a center of the branch port, and,
- wherein the branch port has a length larger than a diameter of the valve port, the branch port having a width smaller than the diameter of the valve port.
A centrifugal compressor, comprising:
- an impeller,
- a compressor inlet tube configured to guide air to the impeller;
- a scroll flow passage disposed on a radially outer side of the impeller;
- a bypass flow passage branching from the scroll flow passage via a branch port, the bypass flow passage connecting to the compressor inlet tube not via the impeller, and
- a bypass valve capable of opening and closing a valve port disposed in the bypass flow passage,
- wherein the branch port has a non-circular shape when viewed along a normal N1 of the branch port passing through a center of the branch port, and
- wherein a length direction of the branch port, is orthogonal to a flow direction of the scroll flow passage which is orthogonal to a flow-passage cross section of the scroll flow passage, the length direction of the branch port defined as a direction in which a dimension of the branch port is the largest.
Dependencies are inferred from the claim text.