| 摘要 |
PURPOSE:To control vibration in a float valve as well as to eliminate a resonance phenomenon of the float valve due to pulsating discharge pressure of an oil pump, by installing a vibro-absorbing element consisting of an orifice or a piston. CONSTITUTION:Valves discs 15a and 15b are opposed to valve seats 14a and 14b formed in the midway of an oil path 13. A valve stem 16 pierces through a cover 17 and is connected to a float, opening and closing these valve discs 15a and 15b according to vertical motion of an oil lever in a vacuum tank. A small cover 19 having an orifice 18 as a vibro-absorbing element in opposition to the other side of the valve stem 16, is attached to a valve body 12. With this constitution, vibration in the valve stem 16 due to pulsation of discharge pressure of an oil pump to be connected to an inlet of a float valve 9 is controllable, thus a resonance phenomenon is eliminable.
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