SU1243988A1 - Pressure regulator for vehicle pneumatic system - Google Patents

Description

The invention relates to a transport, mechanical engineering, in particular to pressure regulators, used in pneumatic systems of vehicles for automatic control of pressure in pneumatic systems within specified limits, to protect them from excessive pressure and compressor unloading.

The aim of the invention is to simplify the design, increase the reliability of the regulator and the accuracy of the adjustment.

The drawing is a schematic diagram of a pressure regulator.

The pressure regulator for the vehicle pneumatic system consists of one located above and fastened together, respectively, the upper, central intermediate and lower sections 1-4, the inlet chamber 5 in the central section 2. Inlet chamber 5 communicates with the inlet channel 6. In the cavity, A filter 7 is located between the upper and central sections 1 and 2. A check valve 8 is installed in the output channel 9 of the central section 2, which connects the inlet chamber 5 with the receiver 10. The receiver 10 is connected to the brake control valve 1 1. Amer 12 vehicle. In the hole of the intermediate section 3, a piston valve 13 is mounted, which is spring loaded with a spring 14 installed in the hole 15 of the lower section 4. In the hole 15 of the lower section 4 there is a valve 17 spring loaded with a spring 16 with a stem 18. The rod is passed through the hole in the intermediate section 3 through an inlet chamber 5 and associated with the diaphragm 19 of the power cylinder. The lower end of the valve 13 is made with a ring 20 located on the side of the opening 15 of the lower section and forms a saddle with the spring-loaded valve 17, the diaphragm 19 is loaded with a spring 1 6 having a pre-compression adjustable by a screw element 21. The stroke of the piston valve 13 is limited by an adjustable travel stop 22 Above the diaphragm 19 in the upper section 1 there is an overflow chamber 23 connected by an opening 24 with an output channel 9. There is an annular protrusion 25 on the stem 18. An overflow diaphragm 19 and a piston

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the valve 13 constitutes the bypass device, and the spring-loaded valve 17 with the rod 18 constitutes the discharge device.

5 The pressure regulator for the vehicle pneumatic system operates as follows.

Compressed air from compressor 26 flows through the inlet to

10 an inlet chamber 5. Next, the compressed air passes through a filter 7, in which solid particles are deposited, water and oil vapor, and condensate flows. Simultaneously compressed air

15 pushes the check valve 8 and passes through the output channel 9 to the main receiver 10, supplying the control valve 11 with the brake chambers 1 2 of the vehicle. The compressed air also penetrates through the opening 24 into the bypass chamber 23 of the bypass device, where the bypass diaphragm 19 acts. Air pressure acts on the piston valve 13 and the spring-loaded valve 17 of the bypass device, as well as on the protrusion 25 of the rod.

However, the bypass device is held by the spring 16 in a resting position until the pressure in the receiver 10 reaches a predetermined operating level determined by the lower limit of the control range, and this limit can be adjusted by a screw element 21 located in the lower section 4. At this moment the air pressure acting on the bypass device, overcomes the counter resistance of the springs 14 and 16 and begins to move it down until the ring 20 of the piston valve 13 rests against the stroke limiter 22 of the piston valve 13. Then, with further movement of diaphragm 19 and valve 17, the seat formed by valves 13 and 17 will open and the compressor 26 is connected to the atmosphere. Condensate is released. The compressor starts to operate under minimum pressure of 1. At this moment, the piston valve 13 under the action of the spring 14 will move up to the stop of the ring 20 to the intermediate section 3. At the moment in the receiver 10

sets the maximum operating pressure, which is determined by the size of the gap between the ring 20 of the piston valve 13 and the limiter

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course 22, which can control the afragma 19, which is also peremes, and the characteristic of the spring 16. Ob-tits up. This moment is determined. The valve 8 closes the outlet with the lower limit of the air regulator's range from the receiver. 10. The pressure in the receiver 10. When the pressure drops in the receiver 10j, the connection 16 closes the inlet chamber 16 moves the valve 17 upstream to the atmosphere, resulting in air

When it stops in the piston seat, the valve begins to flow again from the compressor. The valve 13 is connected by a rod 18 with a diode 26 to the receiver 10.

Claims (1)

PRESSURE REGULATOR FOR PNEUMATIC TRANSPORT SYSTEM A MEANS comprising a housing including lower, central and upper sections, an inlet chamber with inlet and outlet channels communicating via a check valve with a receiver, a bypass device consisting of a diaphragm power cylinder with a rod, an adjusting screw element and a piston valve with a ring, an unloading device, consisting of a spring-loaded valve connected with a rod, characterized in that, in order to simplify the design, increase the reliability of the regulator and the accuracy of regulation, sludge cylinder placed in the upper kordusa section, which is separated from the center section by a partition, and at the stem portion extending through a central hole in the partition wall has an annular projection whose area is equal to the area of the discharge valve device. SU „„ 1243988