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单词 walschaerts
释义

Walschaertsn.

/ˈvalʃəːts//ˈwalʃəːts//ˈvalʃɑːts//ˈwalʃɑːts/
Forms: Also Walschaert.
Etymology: < the name of Egide Walschaerts (1820–1901), Belgian mechanic.
Mechanics.
Used attributively and in the possessive to designate a kind of valve-gear invented by Walschaerts, used on some steam locomotives (see quot. 1911).
ΘΚΠ
society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > parts of > valves
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1880 Inst. Mech. Engineers: Proc. 435 His arrangement..was simply a modification of the Walschaert gear.
1911 Encycl. Brit. XXV. 834/1 A form of radial gear very largely used in locomotives, especially on the continent of Europe, is the Walschaert or Heusinger-Waldegg gear, in which the valve receives its motion in part from the piston cross-head.., and in part from a single eccentric set at right angles to the crank.
1975 B. Reed 150 Years Brit. Steam Locomotives vi. 47/1 Other Group three-cylinder classes..had three separate sets of Walschaerts motion with eccentric drive for the inside set.
This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020).
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n.1880
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