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Что (кто) такое valve gear - определение
MECHANISM THAT OPERATES THE INLET AND EXHAUST VALVES OF A STEAM ENGINE
Eccentric-and-rod mechanism; Eccentric-And-Rod Mechanism; Slip-eccentric valve gear; Isaacson's patent valve gear; Young valve gear; Radial valvegear; Radial valve gear
![View of [[Henschel & Son]] conjugated valve gear mechanism used on [[Victorian Railways H class]] locomotive, driven from the outside Walschaerts valve gear](https://commons.wikimedia.org/wiki/Special:FilePath/H220motion3.jpg?width=200 "View of [[Henschel & Son]] conjugated valve gear mechanism used on [[Victorian Railways H class]] locomotive, driven from the outside Walschaerts valve gear")
.jpg?width=200 "Stephenson's Valve gear. Two eccentrics at nearly 180-degree phase difference work cranks from the main drive shaft. Either can be selected to work the valve slide by shifting the slotted expansion link.")
valve gear
¦ noun the mechanism that controls the opening and closing of the cylinder valves in a steam engine or internal-combustion engine.
Valve gear
The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It can also serve as a reversing gear.
Gresley conjugated valve gear
Gresley Conjugated Valve Gear; Gresley valve gear; Gresley derived motion; Gresley Conjugated valve gear
The Gresley conjugated valve gear is a valve gear for steam locomotives designed by Sir Nigel Gresley, chief mechanical engineer of the LNER, assisted by Harold Holcroft. It enables a three-cylinder locomotive to operate with only the two sets of valve gear for the outside cylinders, and derives the valve motion for the inside cylinder from them by means of levers (the "2 to 1 lever" and "equal lever").
Википедия
Valve gear
The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It can also serve as a reversing gear. It is sometimes referred to as the "motion".
