| 单词 | lift valve |
| 释义 | > as lemmaslift valve lift valve n. a valve which opens by the valve head moving (vertically) out of its (horizontal) seat. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > control(s) > [noun] > valve > lift mushroom valve1877 lift valve1887 1887 Encycl. Brit. XXII. 505/1 In many stationary engines lift or disk valves are used, worked by tappets, cams, or eccentrics. 1887 D. A. Low Introd. Machine Drawing (1892) 68 Flap valves, which bend or turn upon a hinge; (2) lift valves, which rise perpendicularly to the seat; (3) sliding valves, which move parallel to the seat. 1898 Engin. Mag. 16 108/1 Compression has been on the increase ever since the adoption of the lift valve. 1971 B. Scharf Engin. & its Lang. xii. 178 Poppet valves. These are spring loaded lift valves which are commonly used, e.g. in internal combustion engines. < as lemmas |
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