Figure 6-3.—Stationary bellows seal

Chapter 6—REFRIGERATION AND AIR CONDITIONING The rotary seal shown in figure 6-2 consists of a stationary cover plate and gasket, a rotating assembly which includes a carbon ring, a neoprene seal, a compression spring, and compression washers. The sealing points are located (1) be- tween the crankshaft and the rotating carbon rings, and sealed by a neoprene ring; (2) between the rotating carbon ring and the cover plate, and sealed by lapped surfaces; and (3) between the cover plate and the crankcase, and sealed by a metallic gasket. The seal is adjusted by adding or removing metal washers between the crankshaft shoulder and the shaft seal compression spring. A stationary bellows seal is illustrated in figure 6-3. It consists of a bellows clamped to the com- pressor housing at one end to form a seal against a rotating shaft seal collar on the other. The seal- ing points are located (1) between the crankcase and the bellows, and sealed by the cover plate gasket; (2) between the crankshaft and the shaft seal collar, and sealed by a neoprene gasket; and (3) between the surface of the bellows nose and the surface of the seal collar, and sealed by lapped surfaces. The stationary bellows seal is factory set for proper tension and should not be altered. The rotating bellows seals, figure 6-4, consists of a bellows clamped to the crankshaft at one end to form a seal against a stationary, removable Figure 6-2.—Rotary seal. 6-3 Figure 6-3.—Stationary bellows seal. shaft seal shoulder on the other end. The sealing points are located (1) between the crankshaft and bellows, and sealed by a shaft seal clamping nut; (2) between the removable shaft seal shoulder and the crankcase and sealed by a neoprene gasket; and (3) between the bellows nose piece and the shaft seal collar, and sealed by lapped surfaces. This type seal is also factory set. Figure 6-4.—Rotating bellows seal.