Hydraulic brake unit and brake system of railway vehicle

Abstract

The invention provides a hydraulic brake unit of a railway vehicle, which is controlled by a hydraulic controller and comprises an energy accumulator, a proportional pressure reducing valve, a first electromagnetic directional valve, a second electromagnetic directional valve, a pressure reducing overflow valve and an oil tank; a brake caliper is connected with the second electromagnetic directional valve through an oil path, a first channel of the second electromagnetic directional valve is connected with the oil tank, a second channel of the second electromagnetic directional valve is connected with the first electromagnetic directional valve, a first channel of the first electromagnetic directional valve is connected with a proportional pressure reducing valve, a second channel of the first electromagnetic directional valve is sequentially connected with a pressure reducing overflow valve and an energy accumulator, and a first channel of the proportional pressure reducing valve is connected with an oil tank; and a second channel of the proportional pressure reducing valve is connected with the energy accumulator. The invention further provides a braking system of the railway vehicle.

Description

technical field [0001] The invention relates to the field of braking, in particular to a hydraulic braking unit of a rail vehicle and a braking system thereof. Background technique [0002] At present, in the field of rail vehicle braking, hydraulic braking is often used. Among them, the Chinese patent application number "CN201510408931.X", named "High-speed switching valve active tram hydraulic braking system" discloses the following technical solutions The hydraulic braking system of the present invention comprises a hydraulic unit, an active brake cylinder and an accumulator, the hydraulic unit comprises a fuel tank, an oil return system, an oil delivery system and a braking control system, and the braking control system is provided with a closed-loop control passage, Including 2 pcs 3 / 2-way valves. By controlling the energization or de-energization of the first high-speed switching valve, the connection or disconnection between the active brake cylinder and the fuel tan...

AI Technical Summary

Problems solved by technology

[0003] In the above scheme, by controlling the second electromagnetic valve to be energized or de-energized, the active brake caliper is controlled to be connected or disconnected from the accumulator, if the first electromagnetic If the valve and the second solenoid valve are de-energized at the same time, the pressure in the accumulator will be applied to the brake cylinder instantly after passing through the pressure reducing valve, which will easily cause braking impact and cause injury to passengers

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