torsional vibration वाक्य
उदाहरण वाक्य
मोबाइल
- Also, due to the length of the engine, torsional vibration in both crankshaft and camshaft can adversely affect reliability and performance at high speeds.
- From the outset the largest problem was torsional vibration of the crankshaft, at one time necessitating a ban on using below 4000rpm on the bench.
- Torsional vibration specific codes are more versatile for design and system validation purposes and can produce simulation data that can readily compared to published industry standards.
- Although internal combustion engines had always caused torsional vibrations in the drive train, the vibration amplitude was generally not high enough to affect durability or driver comfort.
- The short crankshaft length mitigates the torsional vibration problem, and secondary balance is better than in an inline 6 because there is no piston pair that move together.
- The power flow from the engine crankshaft to the transmission input shaft was connected via a flywheel containing a set of springs to absorb torsional vibrations at the flexplate.
- The load of a propeller and reduction unit can alter the resonant frequencies of the crankshaft, allowing torsional vibration to increase rapidly to high levels at certain rotational speeds.
- It is essential in engines with long crankshafts ( such as straight-8 engines ) and is present on most engines as it reduces torsional vibrations that tend to peak at certain speeds.
- In 2010, centrifugal pendulum absorbers following the patents of Sarazin and Chilton were introduced in a BMW 320D . The reason for it was again the increase in torsional vibrations from higher power engines.
- By interlacing firing events over all three banks of cylinders, this still leads to an even buzzing exhaust note, charge ignition occurring every 40 degrees of crankshaft revolution with consequent reduction of torsional vibration.
- This led to the even, buzzing exhaust note of the Deltic, with a charge ignition every 20 degrees of crankshaft revolution, and a lack of torsional vibration, ideal for use in mine-hunting vessels.
- In contrast, inline six engines have no primary or ( significant ) secondary imbalances, and with carefully designed crankshaft vibration dampers to absorb torsional vibration, will run more smoothly at the same crankshaft speed ( rpm ).
- The mass usually has opposing pairs of radial'arms'sticking out horizontally, threaded with small weights that can be screwed in or out to adjust the moment of inertia to'tune'the torsional vibration period.
- The central power-take-off system using the parallel shaft was intended to reduce torsional vibration of the long crankshaft, but destructive vibration appeared no matter what was changed in firing order, crank counter-weight configuration or crankshaft weight distribution.
- If torsional vibration is not controlled in a crankshaft it can cause failure of the crankshaft or any accessories that are being driven by the crankshaft ( typically at the front of the engine; the inertia of the flywheel normally reduces the motion at the rear of the engine ).
- He invented ( or was the first to use ) detachable wire wheels, bearings that were pressure-fed with oil, stamped steel pistons, piston rings, hollow connecting rods, the torsional vibration damper for 6-cylinder engines, and the harmonic balancer for 4-cylinder designs.
- In the summer of 1913, Electric Boat's chief naval architect, former naval constructor " AA-3 " ( later " T-3 " ) all made their design speed of, insoluble torsional vibration problems with their tandem engines made them very troublesome ships.
- This large amount of lost motion added to the torsional windup of the gear train, when a tooth enters the cut and relaxes when it exits, induces torsional vibration and must be reduced to a minimum by using anti-backlash mechanisms or by grinding the gear sets to an absolute minimum play.
- Despite the shortcomings of length, weight, bearing friction, and torsional vibrations that led to the straight-8's post-war demise, the straight-8 was the performance engine design of choice from the late 1920s to the late 1940s, and continued to excel in motorsport until the mid-1950s.
- Torsional vibration is a concern in the crankshafts of internal combustion engines because it could break the crankshaft itself; shear-off the flywheel; or cause driven belts, gears and attached components to fail, especially when the frequency of the vibration matches the torsional resonant frequency of the crankshaft . Causes of the torsional vibration are attributed to several factors.
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