Chapter 6REFRIGERATION 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
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.
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.