Journal of electricity, power, and gas . finished to reduce hydraulic losses. The Governors. The speed of the turbines is controlled by Pelton oilpressure governors, which are mounted on the distancerings and are driven by bevel gearing from the main are mounted above the governors on supportsbolted to the distance rings. The tachometers are directlyconnected to the governor heads. The governors are fitted with small electric motors forvarying the speed of the main units for synchronizing pur-poses, and a device is provided on each governor for vary-ing the permanent drop in
Journal of electricity, power, and gas . finished to reduce hydraulic losses. The Governors. The speed of the turbines is controlled by Pelton oilpressure governors, which are mounted on the distancerings and are driven by bevel gearing from the main are mounted above the governors on supportsbolted to the distance rings. The tachometers are directlyconnected to the governor heads. The governors are fitted with small electric motors forvarying the speed of the main units for synchronizing pur-poses, and a device is provided on each governor for vary-ing the permanent drop in speed from no load to full can be adjusted for any variation from 5 per centdrop to absolutely constant speed from friction load to max-imum load. The governors are also fitted with hand con-trol mechanism for adjusting the gates independent of theoil pressure. The wicket gates for controlling the supply of waterto the runner of the turbine are steel castings with hand June 27, 1914.] JOURNAL OF ELECTRICITY, POWER AND GAS 565. 3600 Pelton Water Wheel Company FrancisTurbine for Panama Canal Hjdroelectric Stationat Gatun Spillway. finished surfaces. Each gate has its pivot stem extendedupv ard through a packing gland and is fitted with an oper-ating lever. All the gate levers are connected to the gatering by means of bronze links, and the gate ring is con-nected to the governor rockshaft. All the regulating me-chanism is therefore outside the case, except thegates themselves. The water passages on each side ofthe gates are provided with renewable rolled steel wearingplates. The pressure oil for actuating the governors is suppliedby two Pelton rotary pumping units, driven by 10 alter-nating current motors at a speed of 375 , each pumpbeing capable of supplying the governors on all three governors work or. an open system, there being novacuum chambers used. The discharge oil from the gov-ernors is led into oil sump tanks, from which it p
Size: 1547px × 1614px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1800, bookdecade1890, booksubjectelectricity
