SU990565A1 - Pressure regulator - Google Patents

Description

brake control valve 4, opening 5 - chamber B of the second control pressure F through pipe 6 with a compressed air supply line to the brake chambers 7, the pressure in which is changed by the brake force regulator 8, hole 9 - chamber B of the pressure controlled PJ through pipe 10 with brake chambers 11, and opening 12 - chamber G of the supply pressure P through pipe 13 with a cylinder 14 with compressed air. Hole 15 is intended to release compressed air from chamber B (brake chambers 11) to the atmosphere.

The auxiliary plate 16 is provided with an elastic element 17 and under the action of its force Gil is pressed against the stop 18. Articulated telescopically with the auxiliary piston 16, the differential piston 19 is provided with an elastic element 20 and under the action of its force Qi is pressed against the stop 21 made in the auxiliary piston 16. In the center The housing 22 of the regulator 1 has a seat 23 of the intake valve 24, and on the differential piston 19 a seat 25 of the exhaust valve 26. Both valves 24 and 6 are interconnected by a rod 27 on which the elastic element 28 presses the intake valve 24 to the st his seat 23 and form an acceleration valve assembly.

In the initial position, the inlet valve 24 is closed and the exhaust valve 26 is open. The adjustment mechanisms 29 and 30 allow adjustment of the pre-tension of the elastic elements 17 and 20, and hence the characteristic of the proportional valve. The idle camera D has communication with the atmosphere. The compressed air cylinder 14 is connected via pipe 31 to the main brake control valve 4, and cylinder 32 via pipe 33, the main control valve 4, the brakes and pipe 34 to the brake force regulator 8. The auxiliary piston 16 has an upper work surface 35 with an area F ,. Differential piston 19 has an upper working surface 36 with an area of 1, a differential surface 37 with an area Fj and a lower working surface 38 with an area

four

The pressure regulator operates as follows.

During deceleration, compressed air from cylinder 14 through pipeline 31, brake control main valve 4, pipeline 31, brake control main valve 4, pipeline 3 and opening 2 enter chamber A of controller 1 under pressure PJ, affecting the upper working surface 35 with an area auxiliary piston 16 and upper working surface 36 with an area of 1 differential pressure 19. At the same time, compressed air from cylinder 32 through pipeline 33, main valve 4 for controlling brakes, pipeline 34 flows to brake regulator 8 l, and further, under pressure P to the brake chambers 7, and through pipe 6 and hole 5 to the chamber B of the pressure regulator 1, I act on the differential surface 37 with the area R of differential pressure 19.

Under the influence of pressures Pj and P of compressed air, overcoming the force 0. of the elastic element 20, the differential piston 19 moves downwards. Wherein

 the exhaust valve 26 is closed, and upon further movement of the differential interface 19, the inlet valve 24 opens and compressed air from chamber D under pressure PJ enters chamber B, and through opening 9, conduit 10 - into brake chambers 11. At the same time, compressed air acts under pressure P on the lower working surface 38 with an area of 1: differential pressure 19. Thus, in chamber B, pressure F is determined from the expression (before the onset of the auxiliary piston):

R

F4

where: sign “- corresponds to the impact

5 of the elastic element 20 on the differential piston from the bottom up, and the sign “+ - from top to bottom.

If the pressure force P, acting on the auxiliary piston 16 from top to bottom becomes greater than the force Q, of the elastic element 17 acting on it from the bottom up, the auxiliary piston moves down and additionally acts on the differential piston 19. In this case, the value of F is determined from expressions:

p Pi () - HP2-F3-Q, ± Q; f-f

When released, the pressure in chambers A and B decreases, the auxiliary and differential pistons move

0 is up, intake valve 24 is closed, and exhaust valve 26 is opened and compressed air from brake chambers 11 through chamber B and vent 15 is released to the atmosphere.

When the brake chambers 7 exit from the main line (at RD 0), the pressure regulator operates in a similar way. When braking, the compressed air from the cylinder 14 through the pipeline 31, the main brake control valve 4, the pipeline 3 and

- hole 2 enters chamber A under pressure PJ, acting on the upper working surface 35 of the secondary pressure 16 and on the upper working surface 36 of the differential piston 19. Due to the pressure P, overcoming the force O y

Claims (1)

5, the differential element 20 moves downward. At the same time, the exhaust valve 26 is closed, and the inlet valve 24 is opened and compressed air from chamber D under pressure Pj enters the chamber Viv brake chambers 11. At the same time, compressed air under pressure PJ acts on the lower working surface 38 of the differential piston 19. Pressure value P is determined from the expression (prior to the beginning of the action of the auxiliary piston on the differential piston): o - + l P. .. -F4 If the pressure force P, acting on the auxiliary piston from top to bottom becomes greater than the force QI of the elastic element 17, HA stvuyush.a it upwards auxiliary piston Shuffle .aets vnnz and additionally acts on the differential piston. In this case, the value of F is determined from the relation: P, (F,, ± ua aF When released, the pressure in chamber A decreases, the auxiliary and differential pistons are stirred up. Element 24 is closed, and element 26 is opened and compressed air from brake chambers 11 is through Chamber B and vent 15 are released to the atmosphere. The pressure regulator can also work if chamber D is connected to the compressed air supply line from the main brake control valve 4 to chamber A of regulator 1. The first regulating pressure is Fig. 1 shows a modification of the pressure regulator. The pressure regulator shown in Fig. 3 is characterized in that the differential piston 19 is infinitely variable, which simplifies the technology for its manufacture. the differential-.37 surface of the differential piston is equal to the area of its lower working surface 38 (F, -n F, in addition, the differential piston may not be equipped with an elastic element 20. The proposed pressure regulator provides any necessary ootnoshenie between the regulator and the regulated pressures and the rapid filling brake chambers, which significantly increases the safety of movement of vehicles. In addition, the adjustable characteristic of the pressure regulator allows to unify the brake systems of vehicles with different design parameters. Claims of pressure regulation, mainly for pneumatic brake systems of vehicles, tailors, comprising a housing in which differential and auxiliary pistons interact with each other, a double valve controlled by a differential piston, the upper working surface of which is an upper working surface the auxiliary piston and the walls of the housing are limited to the chamber of the first control pressure, the differential surface of the differential piston and the walls of the housing - the chamber of the second regulating pressure, and the lower working surface of the differential piston - the chamber of adjustable pressure, while the auxiliary piston is provided with an elastic element opposing its movement under the action of the first regulating pressure, characterized in that, in order to increase reliability and speed, the pressure chamber is formed in the housing, and the double valve is designed as an acceleration valve assembly, alternating between the pressure-controlled chamber and the supply pressure chamber nor the atmosphere. Sources of information taken into account in the examination 1. USSR author's certificate in patent No. 2679166/11, cl. B 60 T 8/26, 19.78. 25 I PI rz Pz J530 B 16 0i / e.Z r 55 /