Initiative guiding method and initiative guiding device of railway vehicle wheel pair

An actively oriented, rail vehicle technology, applied in the field of steering technology of rail vehicle bogies, to achieve the effect of reducing the risk of derailment

Inactive Publication Date: 2016-07-27

SOUTHWEST JIAOTONG UNIV

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Abstract

The invention discloses an initiative guiding method and an initiative guiding device of a railway vehicle wheel pair, and relates to the steering technique of a railway vehicle. An independent wheel pair is fixedly arranged at one end of an axle; two left and right sets of planetary gear trains are respectively arranged on the inner side of the axle; a sun gear of each planetary gear train is fixed together with the axle of the independent wheel pair; a planet wheel of each planetary gear train is fixed together with a planet carrier through a bearing on a planet axle; the planet carrier is linked with the axle through the sun gear meshed with the planet wheel; the end face is fixed together with a shell through a connecting shaft and a bearing; external gear rings meshed with driving gears fixed at the two ends of a transmission shaft are arranged on the external circle of the planet carrier; two left and right sets of planetary gear trains are linked on the inner side of the independent wheel pair through the transmission shaft; an internal gear ring of a differential gear train on the left side is linked with the shell through the bearing; a worm gear-worm rod pair is arranged on the external gear ring, and is linked with a differential motor through a speed reducer; the internal gear ring of an ordinary gear train on the right side is fixed together with the shell. The initiative guiding method provided by the invention is mainly used for manufacturing a bogie of the railway vehicle.

Application Domain

Locomotives

Technology Topic

Automotive engineeringWheel and axle +6

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Examples

Experimental program(1)

Example Embodiment

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] An active guide device for a wheelset of a rail vehicle, comprising an independent wheelset 1 fixed at one end of a half shaft 17, the inner side of the independent wheelset 1 is respectively provided with two sets of left and right planetary gear trains, the sun gear 2 of the planetary gear train and the independent wheel The half shaft 17 of the pair 1 is fixed, the planet wheel 12 of the planetary gear train is fixed with the planet carrier 10 through the bearing 14 arranged on the planet wheel shaft 11, and the planet carrier 10 is connected with the half shaft 17 through the sun gear 2 meshing with the planet gear 12, The end face of the planet carrier 10 is fixed with the casing 16 through the connecting shaft 7 and its bearing 15. The outer ring of the planet carrier 10 is provided with an outer gear ring that meshes with the transmission gears 9 fixed at both ends of the transmission shaft 8. The left and right two planetary gear trains are connected through the transmission shaft 8; the inner gear ring 6 of the left differential gear train is connected with the casing 16 through the bearing 3, and the outer gear ring is provided with a worm gear-worm pair 4, a worm gear-worm pair. 4 is connected with the differential motor 5 through the reducer; the inner gear 13 of the fixed axle gear train on the right is fixed with the casing 16.

[0037] The left and right two sets of planetary gear trains are connected in reverse symmetry, wherein one group is a single-degree-of-freedom fixed-axis gear train, and the other group is a two-degree-of-freedom differential gear train.

[0038] The outer ring of the planet carrier 10 is provided with a gear structure that meshes with the transmission gear 9 .

[0039] The casing 16 on the periphery of the transmission shaft 8 is connected by a flange.

[0040] An end cover 18 is provided at the contact between the half shaft 17 and the casing 17 .

[0041] The guide device can be used for both the driven wheelset and the driven axle wheelset.

[0042] The independent wheelset 1 can also be arranged on the inner side of the planetary gear train.

[0043] A method for actively guiding a wheelset of a rail vehicle of the present invention comprises the following steps:

[0044] The first step is to use the vehicle satellite positioning system and the coil transponder set on the line to obtain the line positioning information and archive it;

[0045] The second step is to calculate the required speed difference between the left and right wheels according to the curvature radius of the line curve and the vehicle speed in the line positioning information and archive it;

[0046] The third step, programming: when the vehicle runs to the line curve, the controller calls the corresponding pre-stored speed difference information to control the deflection angle of the differential motor 5 according to the pre-stored line positioning information, so as to realize the active steering function;

[0047] The tread of the wheelset 1 of the vehicle can solve the deviation caused by the uneven track and ensure the alignment; that is, when the vehicle is on a straight line, the differential motor 5 is locked, and at this time, the left and right wheels rotate synchronously, and it can be considered that the left wheel and the right wheel It is a coaxial rigid connection, and has the same guiding function as the rigid wheelset of ordinary rolling stock, and has the ability of straight line alignment.

[0048] The invention utilizes the research idea of mechanical coupling, redesigns the guiding method of the rail vehicle from the engineering point of view, realizes the differential speed of the independent wheel sets of the vehicle through the planetary gear train, and relies on the differential motor to drive the inner gear to rotate to realize the differential speed The active control of the wheelset realizes active guidance through the speed control of the wheelset. For the deviation of the track irregularity of the actual line relative to the ideal line, it still depends on the tread taper in the wheel-rail design; while the relaxation curve and the active steering control on the circular curve designed in the actual line rely on the left and right wheels. This method can not only achieve the low floor requirements of the independent wheelset train, but also actively control the differential speed of the left and right wheels of the independent wheelset, so as to achieve the purpose of actively guiding the independent wheelset on the curve , thereby improving the self-centering ability on a straight line and the curve passing ability on a curve of an independent wheelset vehicle.

[0049] When the vehicle is running on a straight track, the ring gear of the planetary gear train is kept in a static state, that is, the differential motor is locked. At this time, the planetary gear train can be regarded as having the same structure as the fixed-axis gear train. Because of its symmetrical connection , the total transmission ratio is 1, so that the left and right wheels rotate synchronously. It can be considered that the left wheel and the right wheel are rigidly connected, which has the same guiding effect as the rigid wheelset of ordinary locomotives and has a certain linear alignment ability.

[0050] When the vehicle runs on a curved track, the differential motor works, and the inner gear of the planetary gear train rotates accordingly, so that the sun gear of the planetary gear train and the sun gear of the fixed-axis gear train have different speeds, thus causing the left and right wheels to generate The speed is poor to achieve the purpose of active orientation.

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