Brake state loop of passive brake system
A braking system, passive technology, applied in braking safety systems, railway braking systems, pneumatic brakes, etc., can solve problems such as inability to drive
Active Publication Date: 2022-07-12
NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD
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Problems solved by technology
as per
figure 1
The brake state circuit design in the above will cause the train brake state circuit to be in the "brake application" state, resulting in the inability to drive
Method used
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[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.
[0020] like image 3 As shown, the passive braking system braking state circuit includes: auxiliary mitigation device, electronic braking unit and relay K.
[0021] The auxiliary relief device has a built-in first pressure switch PS1 for detecting a hydraulic oil low pressure signal and a second pressure switch PS2 for detecting a hydraulic oil high pressure signal. When the auxiliary relief device is not in operation, the hydraulic oil is low pressure, the first pressure switch PS1 is turned off, and the second pressure switch PS2 is closed; when the auxiliary relief device is in operation but the internal oil pressure has not yet reached the relief p...
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The braking state loop of the passive braking system comprises a first pressure switch, a second pressure switch and a relay, wherein the first pressure switch is arranged in an auxiliary relieving device and used for detecting low-pressure signals of hydraulic oil, and the second pressure switch is used for detecting high-pressure signals of the hydraulic oil. The relay is provided with a normally-closed contact and a normally-open contact which are used for outputting braking state signals of the train, and the output signals of the braking state signals of all the trains are connected into a train braking state loop in parallel. A fault signal output by the electronic braking unit and an output signal of a first pressure switch of the auxiliary relieving device drive the relay in a parallel connection mode, a braking state signal output by the electronic braking unit is connected to a normally-closed contact of the relay, and an output signal of a second pressure switch of the auxiliary relieving device is connected with a normally-open contact of the normally-closed contact. According to the braking state loop of the passive braking system, the braking state of a train can be correctly reflected no matter whether an electronic braking unit breaks down or not and whether an auxiliary relieving device is put into work or not.
Description
technical field [0001] The invention belongs to a method for designing a braking state circuit of a hydraulic braking system, which can be applied to the urban rail transit fields such as trams, rubber-wheeled vehicles, suspended or straddle-type monorails equipped with passive hydraulic braking systems, etc. . Background technique [0002] The braking system generally consists of three parts: electronic braking control unit, braking control device and basic braking device. The electronic control unit calculates and controls the braking force according to the train driver's braking command; the brake control device generates and outputs the air or hydraulic pressure corresponding to the braking command to the brake cylinder in the basic braking device according to the control signal of the electronic control unit. Oil pressure; the brake cylinder in the basic brake device acts on the driving mechanism to clamp the rotating brake disc according to the pressure output from th...
Claims
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IPC IPC(8): B60T8/17B60T13/12B60T13/66B60T17/00B60T17/18B60T17/22B61H11/00B61H11/06B61H11/08
CPCB60T8/17B60T8/1705B60T13/12B60T13/66B60T17/00B60T17/18B60T17/22B60T17/228B61H11/06B61H11/00B61H11/08B60T2270/40
Inventor 吴明赵马璐梁艳芬孙环阳吕豪张路
Owner NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD