Train limits speed
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The term "train speed limit" refers to the maximum or minimum speed permitted by the design standards and the technical conditions of various equipment in the operation of the train.
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Train Limiting Speed / Train Limiting Speed Edit
(Limited speed) The maximum or minimum speed permitted by the design standards and the technical conditions of the various equipment in the operation of the train. The maximum operating speed of passenger and freight trains is one of the signs of modernization of the railway, with the progress of science and technology and railway technology and equipment to improve gradually improved. Maximum speed limit speed train rolling stock rolling stock construction speed limit downhill trail in the speed of traffic subject to brakes and braking distance, called the braking on the uphill speed by locomotive traction power Of the constraints, can not be very internal combustion, steam locomotive through the tunnel, the minimum speed can not be lower than the specified value. Design standard speed limit in order to ensure the comfort of the passenger car, curve radius of passenger train traffic speed restrictions, known as curve speed limit, see Figure.
Clip linear and circular curve segment length of the road speed also has some constraints to ensure smooth traffic. Two-lane railway in the interval intersection of two trains, will produce pressure waves will be crushed, may crush the windows, affecting traffic car pressure wave size and the distance between the lines, the degree of the streamline of the practice and theoretical calculations The results show that when the distance between lines is 4.0m, the speed of blunt-shaped train is more than 160km / h, and the speed of streamlined train is more than 200km / h through single-line and the conventional train speed is more than 120km / h, H, in the two-lane tunnel rendezvous, the compartment pressure change rate will cause discomfort or limit the speed or strengthen the air tightness of the tunnel and take mitigation measures in the tunnel entrance. Double-lane railway overrun cargo train and other trains in the intersection, the speed will not exceed the specified value. Track speed limit and repair quality of the line determines the permissible line when the passenger train through the station turnout, turnout and a maximum speed of vertical or lateral fork over speed restrictions. Roadbed disease, bridge damage and the aging of the intersection are the speed limit factor. Speed limit signaling devices Automatic Block III shows the block section length is generally about about 1200m, passenger train speed, the driver can not see the red light after red light signal before parking, consequent may want to limit driving speed. When the speed is not more than 120km / h, the three display automatic block can not limit the speed of when the speed reaches 140 ~ 160km / h, but the traffic is small, the train can reach the yellow light signal before the speed down to the specified value, To ensure that the first block of the red block before the parking area can be temporarily converted to signal when the speed reaches 160km / h and above, the signal should be converted to four display standard. Speed passenger train passenger train maximum speed difference between the problems of the ratio should be about 0.6, after the passenger train speed speed difference is too large, not only on the outside of the curve rail ultra-easy to set up properly, causing increased wear of wheel and and automatic block area , The passenger train deduction coefficient will be increased and the travel speed of the goods train will be reduced. Therefore, the best speed train passenger and freight simultaneously implemented.Fig
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