Hydraulic braking system of low-floor tramcar

Abstract

The invention relates to a hydraulic braking system of a low-floor tramcar and belongs to the technical field of rail vehicles. The hydraulic braking system comprises a hydraulic brake control system,a basic brake device and a magnetic rail brake; the hydraulic brake control system comprises a speed sensor, a load sensor and brake control devices, wherein the speed sensor, the load sensor and thebrake control device are arranged on each bogie; each brake control device can independently control the braking force of the bogie and comprises an electronic brake control unit and a hydraulic brake control unit; and a communication system arranged between a command generation system and the hydraulic brake control system includes a first communication line for information interaction between the brake command generation system and a plurality of brake control devices, and a second communication line for information interaction between two adjacent electronic brake control units. Based on the improvement of the braking system structure, the braking system can be flexibly configured according to vehicles in different groups to facilitate modular design, and can be widely applied to the fields of manufacturing such as rail vehicles.

Description

technical field [0001] The invention relates to a braking system for a rail transit vehicle, in particular to a hydraulic braking system for a low-floor tram. Background technique [0002] Low-floor trams do not need to build platforms on the side of the track because the distance between the bottom plate and the rail surface is usually less than 40 cm, and the turning radius is small, so the line track can be directly laid on the existing roads in the city. [0003] Since line tracks can be laid directly on urban roads, the operating environment of low-floor trams is different from that of subways. They can operate in commercial areas without independent right of way, making their operating intervals intersect with pedestrians and vehicles. In the event of an emergency, the priority is to stop the vehicle to avoid hazards to pedestrians, so the deceleration requirements for low-floor trams are high. [0004] Due to the low floor surface of the low-floor tram, the space und...

AI Technical Summary

Problems solved by technology

[0006] (1) For the existing hydraulic station, it is usually difficult to provide a variety of pressures to control the hydraulic brake caliper for multifunctional operations such as relief and braking operations

[0007] (2) For the existing auxiliary relief device, when the hydraulic unit fails, one of the above two methods must be used for manual relief operation. It takes a long time to relieve the operation, so that the rail transit vehicle cannot be evacuated quickly when the hydraulic unit fails

The push rod in the part must have a mechanism to prevent rotation during normal use; however, the existing structure manual release mechanism is on the other side of the push rod output force, that is, the side where the brake disc 47 is away from the lever 45, and is installed on the car. This side is installed on the inner side of the car body, which is inconvenient to observe. When using it, two locking bolts and anti-rotation pieces need to be removed, which is inconvenient to operate

[0009] (4) For the magnetic rail brake system, the suspension device on it has the following problems. During use, when the gap between the magnetic rail brake and the top surface of the rail increases due to the wear of the sliding shoes, the braking effect will be affected.

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