BENDIX MC-12 MODULATOR CONTROLLER ASSY Průvodce řešením problémů stáhnout pdf (Strana 19)

More info: visit www.bendix.com 1-800-AIR-BRAKE (1-800-247-2725)

Actuators

Actuators convert the air pressure being applied into

a mechanical push-rod force acting on the foundation

brakes. Air enters the actuator and pressurizes a

chamber containing a rubber diaphragm. The air

pushes against the diaphragm, pushing against the

return spring and moving the push-plate (and push-

rod) forward. Some different types of actuators used in

air brake systems are: brake chambers, rotochambers

(with longer push-rod stroke travel), spring brake

actuators (for rear brake axles) and safety actuators

(with internal locking mechanisms).

Brake chambers are available in many sizes, providing

a wide range of output forces and strokes. Different

size brake chambers are identiﬁ ed by numbers which

specify the effective area of the diaphragm: a “type 30”

brake chamber has 30 square inches of effective area.

Some brake chambers with extended push-rod stroke

travel are available.

Rotochambers are also available in several sizes,

providing a wide range of output forces. The rolling

type diaphragm used in rotochambers provides long

life and gives a constant output force throughout the

entire stroke. Rotochambers are frequently used in

industrial applications.

Spring brake actuators are composed of separate

air and mechanical actuators in a single housing.

Mounted at the wheel of the axle it serves, it

functions as a service, parking and emergency brake.

Connected to the service brake valve, the air applied

portion of the actuator functions as the service brake.

The mechanical portion of the actuator contains a

powerful spring which is compressed by adding air

pressure or released by removing air pressure. The

spring brake therefore contains two actuators which

use air pressure in opposite ways. The service

actuator requires air pressure to apply the brakes,

while the park or emergency actuator uses air pressure

to release the brakes.

See the section starting on page 53 for information

about the physics behind how actuators work.

Brake Chamber

Rotochamber

Diaphragms

Spring Brake

Chamber

Brake Chamber

Return

Springs

Spring Brake

Chamber

Parking

Spring

Yoke

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 69 70

Komentáře k této Příručce

Žádné komentáře

BENDIX MC-12 MODULATOR CONTROLLER ASSY Průvodce řešením problémů Strana 19

Komentáře k této Příručce

Související produkty a manuály pro Modulátor BENDIX MC-12 MODULATOR CONTROLLER ASSY