valve spindle वाक्य
उदाहरण वाक्य
मोबाइल
- In practice the valve spindle length is adjusted to ensure this as part of setting the timing.
- The valve spindle crossheads were screwed to the ends of the valve spindles and secured with locknuts.
- The valve spindle crossheads were screwed to the ends of the valve spindles and secured with locknuts.
- Once again, the gabs were driven by the eccentrics and the pin drove the valve spindle.
- An eccentric between the two crankpins drove the centrally-mounted valve spindle by another short connecting rod.
- He did not wish to use an extension of the valve spindles, as on Gresley conjugated valve gear.
- By the time he located the correct handwheel, the valve spindle had been bent by the force of the flooding water.
- Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads, which were oil-lubricated.
- Holcroft continued to develop this mechanism by driving the middle cylinder gear of a steam locomotive from the outside cylinder combination levers, as opposed to Gresley's method of using direct transmission from the front valve spindles.
- Holcroft s valve gear design was also an attempt to address the problems associated with Gresley s conjugated valve gear, which was prone to variations in valve events caused by heat expansion of the valve spindles within the pistons.
- Outside admission gives a shorter exhaust passage, with the consequent advantages of a lower back pressure and sharper blast, but with the disadvantage that the valve spindle glands must be made to withstand much higher pressures and temperatures.
- The Holcroft variant held an advantage over Gresley s " conjugated " design, as the valve timing was immune to variations brought about by heat expansion of the valve spindles and flexing of the conjugation assembly when under heavy use.
- The Gresley conjugated valve gear, driven from the valve spindles of the outside cylinder piston valves, was prone to heat expansion and wear, causing timing difficulties, and required dismantling and removal whenever the centre cylinder valve required service.
- This variant therefore held an advantage over Gresley s design, as the Holcroft valve gear would be immune to variations in valve events brought about by heat expansion of the valve spindles and flexing of the conjugation levers when in heavy use.
- The valve gear was insufficiently robust and the valve spindle guides ( originally cast iron ) had to be replaced in cast steel, but this did not address the fundamental shortcomings of the design and the performance of these large locomotives remained woeful.
- Holcroft s process of driving the middle cylinder directly from the combination lever contrasted to the approach taken by Sir Nigel Gresley, who used an extension of the valve spindles on the outside valve gear to operate the middle cylinders of his locomotives.
- The Gresley design of conjugated valve gear suffered from variations in valve events brought about by heat expansion of the valve spindles and flexing of the combination lever even after considerable re-design of the lever and pivot bracket, affecting the valve events when the locomotive was under way.
- Instead, Holcroft carried-forward the action of the combination lever assembly that controlled the fore and aft movement of the valve spindle ( which admitted " live " steam into the cylinder and ejected " spent " steam out through the ports ) to a pivot point connected to a lever from the " inside " valve spindle.
- Instead, Holcroft carried-forward the action of the combination lever assembly that controlled the fore and aft movement of the valve spindle ( which admitted " live " steam into the cylinder and ejected " spent " steam out through the ports ) to a pivot point connected to a lever from the " inside " valve spindle.
- Other visible differences are larger mechanical lubricators and external drive from the valve spindle, a vacuum ejector exhaust muffler just in front of the safety valves, pipes conveying exhaust and ejector steam to the ashpan for mixing with the primary air, the secondary air inlets in the firebox sides with spark arresting plates outside them, and the snifting and bypass valves which were removed and blanked off since the modified locomotive drifted in mid gear with steam supplied from the drifting valve.
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