SU1671491A2 - Pneumatic system of diesel engine - Google Patents

Abstract

The invention relates to a transport engineering, and more specifically to pneumatic systems of diesel locomotives. The purpose of the invention is to increase the reliability of work. The pneumatic system of the locomotive contains a starting air compressor 1 with a drive 2 connected by a high pressure pipe 3 to a high pressure tank 4. The low pressure suction valve 10 of the start-up air compressor 1 is controlled by a brake supply line 15, which is connected via a non-return valve 16 to the high-pressure stage 11 suction valve. The brake compressor 17 is in communication with the supply line 15 of the main tank 18. A high pressure pipe 3 in front of the high pressure tank 4 has a check valve 19 and an electropneumatic valve 20 also located on the high pressure pipe 3 between the start air compressor 1 and the check valve 19 .1 il.

Description

FIELD: transport engineering.

The aim of the invention is to increase the reliability of operation.

The drawing schematically shows the pneumatic system of a diesel locomotive.

The pneumatic system of the locomotive contains a starting air compressor 1 with a drive 2 connected by a high pressure pipe 3 to a high pressure tank 4. The high pressure tank 4 - a high pressure pipeline 5 is connected to a diesel engine 6. The starting air compressor contains a cylinder 7, which is installed to form high and low pressure stages 8 and 9, having suction 10 and 11 and pressure 12 and 13 valves and a differential piston 14. The suction valve 10 of a low pressure is made controlled from the brake supply line 15. In addition, the pipe 15 is connected through a non-return valve 16 to the suction valve 11 of the high-pressure compressor 1 stage 8 of the start-up air. The brake compressor 17 communicates with the supply line 15 of the main reservoir 18. A non-return valve 19 is installed on the high-pressure pipe 3 in front of the high-pressure tank 4, and a pneumatic valve 20 is located between it and the discharge valve 12 of the start-up air compressor 1.

The system works as follows.

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In the absence of compressed air in the brake supply line 15 and in the high pressure reservoir 4 (at the first start-up), the drive 2 of the start-up air compressor 1 is turned on without a significant increase in the start-up moments and high dynamic loads on the compressor clutch. At the same time, air enters through the suction valve 10 to the low-pressure stage 9 of the compressor 1 start-up air, through the discharge valve 13 and the suction valve 11 to the high-pressure stage 8 8. And from it through the discharge valve 12, the non-return valve 19 installed on High pressure pipe 3, to high pressure tank 4. Upon reaching the specified pressure, the drive 2 of the compressor 1 starting air is switched off. To remove compressed air from the high pressure pipeline 3 at the same time as shutting off

Claims (1)

the actuator 2 turns on the electropneumatic valve 20, ensuring the release of air from the high pressure pipeline 3 to the atmosphere. The check valve 19 prevents air from the pressure vessel 4 from escaping into the atmosphere, which provides a supply of high-pressure air in the pressure vessel 4. Claims of the invention: Pneumatic system of a diesel locomotive, auth.St. USSR No. 1474001, characterized in that, in order to increase reliability, it is provided with a check valve installed in the high pressure pipeline in front of the high pressure tank, and an electropneumatic cut-off valve for communication of the high pressure pipeline section between the starting air compressor discharge valve and the check valve with the atmosphere when the compressor drive is off. 15