Английская Википедия:Hackworth valve gear

Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску

Шаблон:Use dmy dates

Файл:Hackworth valvegear, Lydia, Perrygrove Railway.jpg
Hackworth valve gear on steam locomotive Шаблон:'LydiaШаблон:' at the Perrygrove Railway.
Файл:The Apedale narrow gauge (5549206341).jpg
Hackworth valve gear on Apedale Valley Light Railway locomotive Шаблон:'StanhopeШаблон:'
Файл:Edward Thomas (13796797195).jpg
Hackworth valve gear on Tal-y-Llyn Railway locomotive Шаблон:'Edward ThomasШаблон:'

The Hackworth valve gear is a design of valve gear used to regulate the flow of steam to the pistons in steam engines. It is a radial gear, with an actuating lever driven from the crank. The drive may be taken directly from the crank or indirectly via a return crank (as in all pictures). The other end of the actuating lever is attached to a die block which slides in a slotted link. When the link is vertical, the engine is in mid-gear. Forward, reverse and cut-off adjustments are made by moving the link away from the vertical. The valve rod is pivoted to a point on the actuating lever.[1]

History

The gear was patented by John Wesley Hackworth (1820-1891), son of Timothy Hackworth, in 1859.[2]

Klug's valve gear

Hackworth valve gear was a precursor to Klug's valve gear, but it differs from the latter in that the eccentric rod's suspension point moves to-and-fro in a straight line by means of a die block sliding in a slotted guide.[3]

See also

References

Шаблон:Reflist

Шаблон:Locomotive running gear Шаблон:Steam engine configurations