A Design Evaluation Method for Fixed Frog Wheel-Rail Relationship
A technology for design evaluation and wheel-rail relationship, which is applied to tracks, point switches, roads, etc., and can solve problems such as core-rail wear, metal peeling off wheel flange treads, and increased load capacity of fork core core rails, etc.
Active Publication Date: 2015-07-29
CHINA RAILWAY SHANQIAO GRP CO LTD
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Problems solved by technology
If the fat edge is not polished in time, it is easy to tear the fat edge under the continuous extrusion of the train wheels, which will cause the metal peeling off of the wheel rim tread of the frog
The top empty line where the end of the wheel tread is in contact with the wing rail, that is, the gap between the wheel and the top of the rail is relatively large, which also shows that the stacking height of the wing rail is insufficient, so the load capacity of the fork center rail is even heavier, resulting in serious wear of the center rail
Method used
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[0083] Below in conjunction with the accompanying drawings the present invention is further described, the specific steps are to first carry out the net difference evaluation, through the comparison of the designed frog profile heart-wing rail height difference and the wheel tread at the same corresponding position of the heart-wing rail height difference, evaluate the frog Whether the overall profile of the tread of the fork is reasonable or not; and then conduct a fitting evaluation to evaluate the contact condition between the designed overall frog outline and the wheel, that is, the rule of the wheel-rail preceding contact point and the vertical displacement of the wheel, and then evaluate the local rationality of the frog overall outline sex.
[0084] The concept of net difference: It is divided into actual net difference and theoretical net difference, which refers to the 4-3 height difference H at the characteristic cross-section position and the center rail feature poin...
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The invention relates to a designing and evaluating method for a wheel-rail relation of a fixed type frog. The designing and evaluating method comprises the following steps: A, evaluating a net difference value, namely comparing a difference value of different characteristic points of a tread outline of a characteristic cross section with a difference value of corresponding characteristic points of a wheel tread and judging the rationality of a tread outline design; and B, fitting and evaluating, namely fitting the wheel tread with an actual tread outline and finding out positions, sizes and distribution states of in-advance contact points of a wheel and the tread; and partially optimizing and adjusting the tread outline. The designing and evaluating method for the wheel-rail relation of the fixed type frog has the beneficial effects of being capable of being used for designing the fixed type frog in a rail track turnout; the similar fitting of the train wheel and the tread of the frog can be sufficiently realized; the traveling smoothness of a train is improved; damages, to turnout equipment, caused by that the difference between a wheel shape and the tread top surface outline is great, are reduced.
Description
technical field [0001] The invention relates to a design and evaluation method for fixed-type frog-wheel-rail relationship, belonging to the technical field of design and calculation methods for railway rails. Background technique [0002] A turnout is a connecting and crossing device that enables rolling stock to enter or cross another line from one line. Frog is the key equipment for crossing trains on railway lines, and it is the equipment that makes the wheels pass from one rail to another. Due to the running requirements of the wheels, the acute-angle frog forms a special structural form with wing rails on both sides and center rails in the middle. The operation of the train is realized by the rolling of the wheels on the rail surface. The operation status of the turnout, the contact condition between the rim tread and the wheel, etc. affect the ride comfort, safety and service life of each crossing component. [0003] In the design of the rail top tread of the tradit...
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IPC IPC(8): E01B7/10
Inventor 鹿广清沈艳杰魏建明汤铁兵刘辉刘洪柱
Owner CHINA RAILWAY SHANQIAO GRP CO LTD