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US 9,606,549 B2Granted
Poppet valve
AssigneesKYB Corporation, Tokyo Institute of Technology
InventorsYoshinari Nakamura, Kiyokazu Nagata, Toshiharu Kagawa, Chongho Youn
Life of this patent
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Abstract
A poppet valve is provided with a seat portion which has a conical inner peripheral surface with a center axis, and a conical portion which is displaced along the center axis inside the seat portion, forms a flow passage having an annular cross-section between the conical portion and the seat portion and is supported at a position concentric with the seat portion. An effect of rectifying fluid flowing in the flow passage is thereby obtained and the generation of noise is prevented.
Claims14
A poppet valve, comprising:
- a seat portion which has a conical inner peripheral surface with a center axis;
- and
- a conical portion which is supported at a position concentric with the seat portion and displaceable along the center axis inside the seat portion while forming a flow passage having an annular cross-section between the conical portion and the seat portion,
- wherein, in a longitudinal cross-section of the poppet valve along a plane including the center axis,
- an apex angle of the conical portion is formed between two straight lines corresponding to an outer peripheral surface of the conical portion,
- an apex angle of the inner peripheral surface of the seat portion is formed between two further straight lines corresponding to the inner peripheral surface of the seat portion, and
- the apex angle of the conical portion is greater than the apex angle of the inner peripheral surface of the seat portion,
- wherein the poppet valve is configured for a fluid to flow through the poppet valve in the flow passage in a direction in which a diameter of the conical portion decreases, and
- wherein a cross-sectional area of the flow passage gradually increases toward a downstream side of the flow passage.
6 more elements
A poppet valve, comprising:
- a seat portion which has a conical inner peripheral surface with a center axis;
- and
- a conical portion which is supported at a position concentric with the seat portion and displaceable along the center axis inside the seat portion while forming a flow passage having an annular cross-section between the conical portion and the seat portion,
- wherein, in a longitudinal cross-section of the poppet valve along a plane including the center axis,
- an apex angle of the conical portion is formed between two straight lines corresponding to an outer peripheral surface of the conical portion,
- an apex angle of the inner peripheral surface of the seat portion is formed between two further straight lines corresponding to the inner peripheral surface of the seat portion,
- the apex angle of the conical portion is greater than the apex angle of the inner peripheral surface of the seat portion,
- wherein the poppet valve is configured for a fluid to flow through the poppet valve in the flow passage in a direction in which a diameter of the conical portion decreases,
- wherein a ratio of a length of the seat portion along the center axis to a maximum radius of the seat portion is 1 or higher, and
- wherein a downstream tip of the seat portion is located in a vicinity of a tip of the conical portion in a state where the conical portion is seated on the seat portion.
7 more elements
Dependencies are inferred from the claim text.