SU71937A1 - Air distributor for air rail brakes - Google Patents

Description

The invention relates to the improvement of a distributor with primary and secondary distribution bodies, of which the primary body, which is under the influence of the air pressure of the main line and the distribution chamber, produces during discharge deceleration the distribution chamber acting by its pressure on the secondary organ. In such air distributors, it is known to use surge chambers that absorb air from the distribution chamber during service and emergency braking to form a corresponding amount of pressure surge in the brake cylinder.

The aim of the invention is the implementation during emergency braking of a secondary pressure jump in the brake cylinder. To this end, according to the invention, an additional chamber is used, connected to the emergency braking jump chamber by a calibrated orifice and controlling the discharge valve of the distribution chamber.

Another object of the invention is to create a dependence of the deceleration rate on the degree of discharge of the main air duct. This goal is achieved by applying a spring buffer acting on the spool of the primary organ, opening the passage of air from the distribution chamber to the atmosphere, depending on the compression of the buffer.

The drawing shows schematically a portion of the air distributor.

The secondary organ in the diagram is not shown, but only the distribution chamber M2 is shown, acting by its pressure on the secondary organ.

The primary organ includes a piston / with a cut-off spool 2 that is rigidly associated with it. The spool is connected to the piston / with a longitudinal gap. The spool 4 of the buffer 4 is articulated with the spool 3, and No. 71937-2 is loaded with a spring 5. The spools 2 and .5 control the message of the distribution chambers M | and Ms with the hopping chambers of service braking S / S and emergency braking SK.E. The SCE-2 chamber is connected to the SSC camera through a calibrated opening 6. The pressure in this chamber acts on the piston 7, which is loaded on the opposite side of the pressure of the spring 8. The shank 10 of the piston 7 moves to the left (according to the drawing) and pushes the valve end 9 of the discharge chamber MS.

During emergency braking, first, the spool 3 generates a message of the chamber M2 with the shock chamber of the SCE to form the first pressure surge in the brake cylinder. After that, the chamber M is gradually discharged into the chamber MI through the slit 11 opened by the spool 3. The width of this slit is determined by the tension of the buffer spring 5. At the same time, the SCE-2 chamber from the SCE chamber is gradually filled through the calibrated orifice 6. When the air pressure to the piston 7 exceeds the pressure of the spring 8, the piston moves to the left and opens the valve 9, discharging the MZ chamber through the wide aperture J2. This discharge causes a secondary pressure jump in the brake cylinder.

Subject invention

Claims (2)

1.Air distributor for air rail brakes, equipped with primary and secondary distribution bodies and incorporating a device in the form of jump chambers and a spring-loaded valve for emergency discharge of the distribution chamber of the secondary body, providing, with their appropriate commissioning, a double jump increase in pressure in the brake cylinder This is due to the fact that in order to obtain, after a desired period of time, a secondary jump in the increase of pressure in the brake cylinder is applied and an additional chamber connected to the jump chamber (emergency braking) with a corresponding calibrated orifice and controlling the discharge valve of the distribution chamber. 2. Air distributor according to claim 1, characterized in that, in order to create a dependence of the deceleration rate on the degree of discharge of the main air duct, a spring buffer is used that acts on the spool of the primary organ, opening the passage of air from the distribution chamber to the atmosphere depending on the compression of the buffer.