CN2415359Y - Rail vortex brake testing bench - Google Patents

Abstract

The utility model relates to a testing device for a train rail vortex brake test and for testing the braking force of a train rail. The utility model is composed of a mechanical part, a measuring part and an electric part, wherein, the mechanical part is composed of a base, a motor, a main shaft, a rail wheel, a brake device, a bracket and a braking electromagnet. The utility model is characterized in that the device is also provided with an inertia wheel which is coaxial with the rail wheel, the bracket and the braking electromagnet are positioned right above the rail wheel, and two pressure sensors are arranged on both sides of the bracket along the tangential direction of the rail wheel. The utility model has the advantages of small vibration for a testing bench, and reliable and accurate testing data of braking forces.

Description

The High-Speed Eddy Braking testing table

The utility model relates to a kind of test unit, especially simulates the train rail eddy-current brake and tests the test unit of its damping force.

For a long time, train foundation brake, resistive braking and regenerative braking are mostly adopted in the braking of train, also have disc braking in the recent period.These modes of braking all rely on the clinging power between wheel rim and rail, by friction, realize braking, so exist inevitably between wheel track rub, skid, resistance heating or need often to change the brake component that is worn, produce such or such defectives such as drag friction and friction dust pollution simultaneously, more outstanding for these defectives of bullet train.The eighties begins, the research that the eddy current that Germany, France, Japan have begun to utilize electromagnet to produce at rail level is in succession braked the train of high-speed cruising.The principle of this High-Speed Eddy Braking is: be suspended under the bogie electromagnet that keeps certain air gap with rail level and pass to DC current, can in the raceway surface layer, produce eddy current, under the effect of eddy current magnetic flux, the magnetic flux that the magnetic flux distortion of normal distribution distributes for oblique line, the magnetic flux that oblique line distributes are decomposed into two flux component of vertical rail level peace row rail level, and the former attracts rail, the train adhesion weight is increased, help braking, the latter holds the train that advances by electromagnet, becomes damping force.

Utilize this principle, Japan has developed that a kind of rail wheel does not rotate and has been rotated the High-Speed Eddy Braking testing table of simulation train movement by electromagnet around rail wheel, because this testing table need utilize brush to pass to big electric current for the electromagnet of rotation, thereby except that the Maintenance and Repair amount greatly, also can influence the stable performance of damping force sometimes because of the brush loose contact; And the disclosed High-Speed Eddy Braking testing table in " ZEV-GLAS; 1985; 109 (9): 368 " of Germany development though its electromagnet does not rotate and utilizes rail wheel rotary simulation train movement, thereby does not need brush, nothing electrically contacts, the problem of Maintenance and Repair, but because its electromagnet and support adopt the formula of swaying, most of weight all rides on the test power cushion cap, thereby very high to the requirement for dynamic balance of rotor wheel, vibrate bigger, also big to the interference of damping force test.

The purpose of this utility model provides that a kind of damping force is stable, vibration is little, test data High-Speed Eddy Braking testing table accurately.

Solution of the present utility model is, a kind of High-Speed Eddy Braking testing table, form by mechanical part, electric part, measure portion, mechanical part is made of pedestal, motor, main shaft, rail wheel, support, Brake Electromagnet, the driven by motor main axis rotation, rail wheel is installed in main shaft middle part, Brake Electromagnet by the pull bar that is connected a top of the trellis be lifted in the support, the wheel rim outside of rail wheel and keep certain air gap with rail wheel, the support bottom by Bearing Installation on main shaft; Measurement mechanism is made of velocity gauge, force cell, register instrument, it is characterized in that; Rail wheel one side also is coaxially installed with a flying wheel identical with the rail wheel diameter, support is vertically mounted on the main shaft by bearing, and can do slightly swing to both sides around main shaft, rail wheel and flying wheel are positioned at support, Brake Electromagnet is lifted on the support directly over the rail wheel by two pull bars that pulling force sensor is housed, the support both sides also have two dynamometry seats, and a pressure transducer has all been installed along the rail wheel tangential direction in each dynamometry seat top, and velocity gauge is installed in spindle nose.

Screw thread is arranged at described pull bar top, and pull bar is fastened on cantilever tip by threaded engagement, adjusts pull bar and can change size of gaps between Brake Electromagnet and rail wheel.

Described Brake Electromagnet is by the arc yoke and be installed in that 6～8 blocks of electromagnet of parallel-series constitute in the yoke, and the air gap of Brake Electromagnet and rail wheel is 4～10mm.

Described yoke also links to each other with a top of the trellis through a suspension rod, and this suspension rod is in the non-stress situation under the normal condition.

By threaded engagement 2～10 locating devices have been installed corresponding to the position of yoke is equidistant on the end plate of described support both sides, and have been had 1～4 ventilation, watch window at position corresponding to Brake Electromagnet.

Described motor links to each other with main shaft by driving belt, drives main axis rotation.

Described electric part by IGBT DC chopped-wave excitation control cabinet with exchange transmission IGBT frequency control cabinet and constitute, IGBT DC chopped-wave excitation control cabinet provides the direct current of 0～200A for Brake Electromagnet; Exchanging transmission IGBT frequency control cabinet provides frequency at any adjustable alternating current of 0～60Hz for motor.

The utility model since with support and Brake Electromagnet be installed in rail wheel directly over, avoided the excessive phenomenon of testing table vibration, testing table only produces microvibration when flying wheel and rail wheel run up with 300 kilometers/hour speed, guaranteed experimental safe, the damping force test data is reliable, accurate; In addition, be installed in non-stress suspension rod that top of the trellis is connected with Brake Electromagnet can also bear Brake Electromagnet when pull bar ruptures weight, prevent under unexpected situation, the fall major accident of initiation of Brake Electromagnet.

Below, in conjunction with the accompanying drawings and embodiments the utility model is elaborated.

Fig. 1 is an assembly drawing of the present utility model;

Fig. 2 is the face figure of the utility model Brake Electromagnet part.

Embodiment: from Fig. 1 as seen, the utility model is made up of pedestal 1, main shaft 6, rail wheel 4, flying wheel 5, support 17, bearing 7, supporting sleeve 8, Brake Electromagnet 14, locating device 3, pull bar 15, pulling force sensor 16, suspension rod 2, dynamometry seat 12, pressure transducer 13, motor 11, brake gear 10, driving belt 9.The two ends of main shaft 6 are installed on the pedestal through supporting sleeve 8, one end end links to each other with the axle head of motor 11 by driving belt 9, brake gear 10 is installed in 9 of motor 11 and driving belts, the bottom of support 17 is installed on the main shaft 6 through bearing 7, rail wheel 4, flying wheel 5 are sleeved in the support 17 at main shaft 6 middle parts, dynamometry seat 12 is positioned at support 17 both sides, and its top is equipped with pressure transducer 13 along the tangential direction of rail wheel 4.As shown in Figure 2, respectively there are three equidistant locating devices 3 at yoke 18 positions corresponding to Brake Electromagnet 14 on the both sides end plate of support 17, this locating device 3 is made of the screw rod of TOE and the ball of the embedding screw rod other end, so that Brake Electromagnet 14 location.On the end plate of the both sides of support 17 corresponding to equidistant two ventilations, the watch window 19 of having in Brake Electromagnet 14 positions.Brake Electromagnet 14 is made of the electromagnet 14 of yoke 18 and six series connection, and it is lifted on the support 17 through pull bar 15 and pulling force sensor 16, and be positioned at rail wheel 4 directly over.Screw thread is arranged at pull bar 15 tops, and its underpart connects pulling force sensor 16, and pull bar 15 tops are fastened on support 17 tops by nut, and adjusting yoke 15 can change the air gap between Brake Electromagnet 14 and the rail wheel 4, so that air gap is adjusted at specialized range.Yoke 18 middle parts of Brake Electromagnet 14 also are connected with a suspension rod 2 with support 17 tops, suspension rod 2 is in the non-stress state when normal condition, in case pull bar 15 fractures, suspension rod 2 just bears the weight of Brake Electromagnet 14, avoids Brake Electromagnet 14 to fall and damages and the accident generation.

When motor 11 when electric, motor 11 rotates and drives driving belt 9 motions, driving belt 9 drives main shaft 6 rotations, and then makes rail wheel 4, flying wheel 5 rotations, and the rotating speed of rail wheel 4 can be given by the out-put supply frequency that changes the interchange transmission IGBT frequency control cabinet that connects motor 11.The velocity gauge that is installed in main shaft 6 ends links through anti-interference lead and pen recorder, and the rotating speed with main shaft 6 reaches pen recorder at any time.When rail wheel 4 high speed rotating, when IGBT DC chopped-wave excitation control cabinet is that Brake Electromagnet 14 is when passing to the certain DC excitation electric current of the magnitude of current, produce the magnetic field boundary around the Brake Electromagnet 14, the magnetic field boundary passes rail wheel 4 surfaces that only keep 4～10mm air gap and high speed rotating with Brake Electromagnet, will produce eddy current on the surface of rail wheel 4; And produce a suction and a damping force thus in rail wheel 4 surperficial tangential directions perpendicular to rail wheel 4 surfaces, this suction reaches pen recorder by the pulling force sensor on the pull bar 15 16, and damping force reaches pen recorder by the pressure transducer 13 of support 17 both sides; Rail wheel 4 at high speed rotating decelerates to rapidly because of the eddy-current brake effect in the overall process of stopping, and signals such as damping force, pulling force and rotating speed are delivered to pen recorder, by its record and printing in real time by anti-interference lead and anti-interference process.

Claims (7)

1, a kind of High-Speed Eddy Braking testing table, by mechanical part, electric part, measure portion is formed, mechanical part is by pedestal, motor, main shaft, rail wheel, support, Brake Electromagnet constitutes, the driven by motor main axis rotation, rail wheel is installed in the main shaft middle part, Brake Electromagnet is lifted in the support by the pull bar that is connected a top of the trellis, keep certain air gap outside the wheel rim of rail wheel and with rail wheel, the support bottom by Bearing Installation on main shaft, measurement mechanism is by velocity gauge, force cell, register instrument constitutes, it is characterized in that: rail wheel one side also is coaxially installed with a flying wheel identical with the rail wheel diameter, support is vertically mounted on the main shaft by bearing, and can do slightly swing to both sides around main shaft, rail wheel and flying wheel are positioned at support, Brake Electromagnet is lifted on the support directly over the rail wheel by two pull bars that pulling force sensor is housed, the support both sides also have two dynamometry seats, a pressure transducer has all been installed along the rail wheel tangential direction in each dynamometry seat top, and velocity gauge is installed in spindle nose.

2, High-Speed Eddy Braking testing table according to claim 1, it is characterized in that: on the described pull bar screw thread is arranged, pull bar is fastened on cantilever tip by threaded engagement, adjusts pull bar and can change size of gaps between Brake Electromagnet and rail wheel.

3, High-Speed Eddy Braking testing table according to claim 1 is characterized in that: described Brake Electromagnet is by the arc yoke and be installed in that 6～8 blocks of electromagnet of parallel-series constitute in the yoke, and the air gap of Brake Electromagnet and rail wheel is 4～10mm.

4, High-Speed Eddy Braking testing table according to claim 2 is characterized in that: described yoke also links to each other with top of the trellis through a suspension rod, and this suspension rod is in the non-stress situation during normal condition.

5, High-Speed Eddy Braking testing table according to claim 1, it is characterized in that: on the end plate of described support both sides, by threaded engagement 2～10 locating devices have been installed, and have been had 1～4 ventilation, watch window at position corresponding to Brake Electromagnet corresponding to the position of yoke is equidistant.

6, High-Speed Eddy Braking testing table according to claim 1, it is characterized in that: described motor links to each other with main shaft by driving belt, drives main axis rotation.

7, High-Speed Eddy Braking testing table according to claim 1, it is characterized in that: described electrical appliance part by IGBT DC chopped-wave excitation control cabinet with exchange transmission IGBT frequency control cabinet and constitute, IGBT DC chopped-wave excitation control cabinet provides the direct current of 0～200A for Brake Electromagnet, and exchanging transmission IGBT frequency control cabinet provides frequency at 0～60Hz adjustable alternating current arbitrarily for motor.

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