Design and operation of supply line devices
The pneumatic drive of the brake mechanisms (Fig. 1) has a source of compressed air - compressor 1
The compressor, the pressure regulator 3, the fuse 4 against freezing of condensate in compressed air and the condensate receiver 20 form part of the drive, from which the purified compressed air of water at a given pressure is supplied in the required amount to the rest of the pneumatic drive and to other consumers of compressed air.
The drive is divided into autonomous circuits, separated from one another by protective valves. Each circuit operates independently of the others.
Circuit 1 of the drive mechanism of the working brake system of the front axle includes:
- - part of the triple protective valve 6; receiver 15 with a volume of 20 l with a condensate drain valve and a pressure drop sensor 23 in the receiver, part of a two-pointer pressure gauge 21;
- - the lower section of the two-section brake valve 17;
- - control output valve "C";
- - pressure limiting valve 19; two brake chambers 20;
- - front axle brakes;
- - pipelines and hoses between these devices.
In addition, the circuit includes a pipeline connecting the lower section of the brake valve 17 with the valve 27 for controlling the brake systems of the trailer with a two-wire drive.
Circuit II of the drive mechanisms of the working brake system of the rear bogie consists of:
- - from part of the triple safety valve;
- - receivers 13 with a total volume of 40 l with condensate drain valves 16 and a pressure drop sensor 23 in the receiver;
- - parts of two-pointer manometer 21;
- - the upper section of the two-section brake valve 17;
- - control output valve "D";
- - an automatic regulator of 26 brake forces with an elastic element;
- - four brake chambers 26 brake mechanisms.
The circuit also includes a pipeline connecting the upper section of the brake valve 17 with the valves 26 for controlling the brake systems of the trailer.
Circuit III of the drive mechanism of the spare and parking brake systems, as well as the combined drive of the brake systems of the trailer (semi-trailer) includes:
- - part of the double protective valve 5;
- - two air receivers 14 with a total volume of 40 l with a condensate drain valve and a pressure drop sensor 23 in - the receiver;
- - two valves of control outputs "B" and "E";
- - crane 10 for controlling the parking brake system;
- -accelerator valve 25; part of the double-line bypass valve 24;
- - four spring energy accumulators 22, pressure drop sensor 18 in the line of spring energy accumulators;
- - valve 31 for controlling trailer brake systems with a two-wire drive;
- - single protective valve 28;
- - valve 27 for controlling trailer brake systems with a single-wire drive;
- - three disconnecting valves 29. three connecting heads (one head 38 of type "A" of a single-wire drive of trailer brake systems and two heads of type 32 of "Palm" of a two-wire drive of brake systems of a trailer);
- - pneumoelectric sensor 31 for turning on the brake signal;
- - pipelines and hoses between these devices.
Circuit III of the drive of the auxiliary brake system mechanisms and other consumers consists of:
- - from the part of the double protective valve 5; crane 11;
- -two cylinders for driving dampers of the gas-dynamic brake mechanism;
- - one pneumatic cylinder 10 of the drive of the engine stop lever, pneumoelectric sensor, pipelines and hoses between these devices.
The actuator is supplied with air from a condensation receiver, the circuit does not have a pressure drop indicator lamp.
From the circuit IV of the drive of the mechanisms of the auxiliary brake system, compressed air is supplied to additional consumers: a pneumatic signal, a pneumohydraulic clutch booster, drives of transmission units, etc.
Features of the pneumatic drive of the brake systems of cars of models 5511, 53212: to improve moisture and oil separation in the supply part of the brake drive of the car mod. 53212 in the section compressor - pressure regulator on the first cross member of the frame in the zone of intensive blowing, an additional moisture-oil separator is installed; on a dump truck mod. 5511 there is no trailer brake system control equipment, release valves, connecting heads.