Disk Clutches
The clutch is a component that connects a driving and driven part in a mechanism. When the clutch is engaged, the power produced by the engine is transmitted through the clutch to the transmission. When the clutch is disengaged, the power flow stops at the flywheel. The clutch is generally made up of the clutch housing, the flywheel, the clutch disc (or discs), the pressure plate, the release assembly, and the controls. The clutch forces plate surfaces together under pressure. The disk clutch is a clutch which consists of a series of flat friction plates or discs (which enable power transmission) held together by a spring.
(Mike Byrnes, Bumper to bumper: the complete guide to tractor-trailer operations, p.92)
Cone Clutches
The clutch is a component that connects a driving and driven part in a mechanism. When the clutch is engaged, the power produced by the engine is transmitted through the clutch to the transmission. When the clutch is disengaged, the power flow stops at the flywheel. The clutch is generally made up of the clutch housing, the flywheel, the clutch disc (or discs), the pressure plate, the release assembly, and the controls. The clutch forces plate surfaces together under pressure. A cone clutch consists of inner and outer conical surfaces. The outer cone is keyed to the driving shaft, while the inner cone is free to slide axially on the driven shaft due to splines. The axial force required to engage the clutch is provided by means of helical compression spring. In engaged position, power is transmitted from the driving shaft to the outer cone by means of the key. Power is then transmitted from the outer cone to the inner cone by means of friction. Finally, power is transmitted from the inner cone to the driven shaft by means of splines. In order to disengage the clutch, a fork is inserted in the shifting collar to shift it axiallt towards right side. This releases pressure between inner and outer cones and no torque can be transmitted.
(V.B. Bhandiri, Design of Machine Elements, p.461)
Electrochemical Corrosion
Electrochemical Corrosion is understood to include all corrosion processes that can be influenced electrically. Corrosion in general is the chemical reaction between the metal and the surrounding environment. Electrochemical corrosion occurs in corrosive environments depending on the galvanic series. There are several types of electrochemical corrosion such as uniform corrosion, galvanic corrosion, hydrogen induced cracking etc. these can be present either one at a time or both in one case.
(Baeckmann, W, Handbook of cathodic corrosion protection, p.29)
Film Deposition
Thin-film deposition is about phase transition from the vapor phase to solid phase. Atoms condense on a substrate. These adsorbed atoms are subject to desorption and surface diffusion. Some adsorbed atoms bond to each other, reducing the desorption probability. More atoms aggregate and some of the bigger clusters avoid desorption.
(Franssila, S., Introduction to Microfabrication, p. 78)
No comments:
Post a Comment