ROTARY VALVE OF HYDRAULIC BUFFER
PURPOSE:To prevent the generation of swish noise by setting the top edge part of a rotary rod opposite to an inner vacant part and setting the thin hole of a rotary valve opposite to the outer peripheral surface of the top edge surface of the rotary rod. CONSTITUTION:A rotary valve 4 is turning-oper...
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Zusammenfassung: | PURPOSE:To prevent the generation of swish noise by setting the top edge part of a rotary rod opposite to an inner vacant part and setting the thin hole of a rotary valve opposite to the outer peripheral surface of the top edge surface of the rotary rod. CONSTITUTION:A rotary valve 4 is turning-operated, and a drilled thin hole 4a puts a bypass passage L into a communication state, and a piston part 2 is set into an extension/contraction cycle in which the piston part 2 gets out from the inside of a cylinder 1, and then the working oil supplied from a rod side oil chamber A flows into the inner vacant part 4b of the rotary valve 4 through the thin hole 4a of the rotary valve 4. At this time, though the working oil supplied from the rod side oil chamber A on the high pressure side is allowed to flow sharply into the inner vacant part 4b on the low pressure side, the sharp flow of the working oil into the inner vacant part 4b collides with the top edge part 5b of the rotary rod 5, since the top edge part 5b of a rotary rod 5 is set close to the inner vacant part 4b. Accordingly, in the inner vacant part 4b, the direct collision of the sharp flows of the working oil is prevented, and the generation of swish noise is prevented. |
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