RU2201355C1 - Electric locomotive current collector with active control of movable system - Google Patents

Abstract

FIELD: transport engineering; electric vehicle current collectors. SUBSTANCE: proposed current collector for electric locomotives contains movable frames with lifting mechanism and automatic height adjuster mounted on roof of electric locomotive and insulated from roof. Current collector is provided with trolleys on which pan and pressure pickup are mounted by means of carriers. Aerofoil section hinge secured on frames is provided with slat and flap on front (leading) and rear (trailing) edges, respectively, which are mounted for movement in vertical plane. Slat and flap control system arranged inside aerofoil section includes series- connected supply unit, quick-acting pneumatic servo drive and slave mechanism, outlets of pressure pickup being connected with inlet electric contacts of pneumatic servo drive. EFFECT: improved stability of contact pressure of current collector onto contact wire at high speeds of running. 3 dwg

Description

 The invention relates to railway transport, and more particularly to a current collector on electric locomotives.

 Known current collector, providing current collection from the contact wire at high speeds of the electric locomotive, which has a device that provides active vibration damping using a high-speed hydraulic drive [1].

 The disadvantage of the current collector is a small decrease in dynamic forces in contact with the wire during vertical oscillations of the current collector.

 Known current collector, bearing an aerodynamic profile with unchanged geometry, compensating for the change in lift at high speeds of the electric locomotive [2]. The disadvantage of this device is the low efficiency when there is an oscillation of the contact wire or the current collector itself, as well as the fact that the aerodynamics of the profile change when the wind direction changes relative to the direction of train movement.

 As a prototype for the claimed object, a DSA350S current collector [3] was chosen, designed for current collection with contact suspension Re 250 and used on high-speed electric trains. This current collector, like the structures mentioned above, contains movable frames mounted on the roof of an electric locomotive and electrically insulated from it with a lifting mechanism and an autoregulator of height, carriages on which a skid with contact inserts is mounted using supporting structures. The current collector is additionally equipped with a device for active regulation of the mobile system, which uses a typical proportional-integral circuit with feedback by pressing force, the sensitive elements of which are a pressure sensor, and a bandpass filter with a transmission frequency of about 2 Hz is installed in the feedback circuit.

 The disadvantages of the device are the complexity of the equipment, the lack of stability of contact pressing during operation when: 1) the occurrence of resonant oscillations in the contact wire - current collector system; 2) with variable in magnitude and direction of wind loads acting on the current collector. Both disadvantages are largely due to the large mass and inertia of the current collector.

 The objective of the invention is to increase the stability of contact pressing at various speeds of the train (up to 400 km / h) in the presence of possible vibrations of the wire, electric locomotive and the current collector itself. The technical result is achieved by the fact that in a current collector with active regulation of the mobile system for electric locomotives, comprising movable frames mounted on the roof of the electric locomotive and electrically insulated from it with a lifting mechanism and an autoregulator of height, carriages on which a runner with contact inserts and a pressure sensor are mounted using supporting structures , on the frames an aerodynamic profile is pivotally fixed, having on the front and rear edges a slat and a flap, respectively, mounted with the possibility of changing joints in a vertical plane, and inside the profile is placed. a slat and flap control system including a power supply connected in series, a fast-tracking servo-pneumatic actuator and an actuator, while the outputs of the pressure sensor are connected to the input electrical contacts of the servo-pneumatic servo. A servo pneumatic actuator is considered, for example, in [4].

 In FIG. 1 shows a general view of a current collector made, for example, in the form of a half-pantograph; in FIG. 2 - sectional aerodynamic profile with a slat and flap control system; in FIG. 3 is a block diagram of a slat and flap control system.

 On the roof 1 of the electric locomotive there are movable frames 2, mounted on a platform 3, which is electrically insulated from the roof of the car by insulators. Current collection is carried out from the contact wire 4. On the frames 2, with the help of hinges 5, an aerodynamic profile 6 with movable slat 7 and flap 8 is fixed. The slat and flap are identical in shape, so when the train moves in the opposite direction, they change places according to their functional purpose. Changing the shape of the aerodynamic profile is provided by the simultaneous movement of the slat and flap, carried out in a vertical plane.

 Inside the aerodynamic profile 6 there is a follower pneumatic actuator 9 and an actuator 10 that moves the slat 7 and the flap 8. The follower pneumatic actuator 9 is connected to a power unit 11 located on the platform 3.

 On the carriages of the current collector 12 there is a runner 13 with sprung contact inserts 14. Under the runner 13 there is a pressure sensor 15, the outputs of which are connected to the input electrical contacts of the follower pneumatic actuator 9. The pressure sensor 15 and the runner 13 are separated by an insulating strip 16.

 The lifting device is a lifting mechanism 17, which is also mounted on the platform 3, the movement is carried out until the contact of the contact inserts 14 with the contact wire 4.

 Active adjustment of the movable current collector system is as follows. When the pressure deviation from the side of the contact wire 4 to the contact inserts 14 is higher or lower than the specified value, the signal from the pressure sensor 15 is fed to the input 9 of the pneumatic follower and, using the actuator 10, moves the slat 7 and the flap 8 of the aerodynamic profile 6. Changing the shape of the aerodynamic profile 6 leads to the appearance of positive or negative in sign of the lifting force, compensating for the change in the force of contact pressing.

 Improving the efficiency of the current collector is due to the stabilization of contact pressing in a wide range of train speeds.

Literature
1. Current collector test for high speed electric train, YSME. YntY.C. 1997 40 4 pp. 671-680.

 2. V.P. Mikheev. Current collector for high-speed trains Railway transport, 1997, 6, p. 46-48.

 3. Aktiv Stromabnehmer bei Hocheschwindigkeitszugen / D. Huber, G. Joms, H. Tessun // Elek / Bahnen.-1993.-91, 12.-p. 382-388-German.

 4. Pneumatics and hydraulics. Issue 9. Ed. E.V. Herz. M., Mechanical Engineering, 1982, with. 47.

Claims (1)

 A current collector with active regulation of the mobile system for electric locomotives, comprising movable frames mounted on the roof of the electric locomotive and electrically insulated from it with a lifting mechanism and auto-height adjustment, carriages on which the skid and pressure sensor are mounted using supporting structures, characterized in that the aerodynamic pivotally mounted on the frames a profile having a slat and a flap on the front and rear edges, respectively, mounted with the possibility of movement in a vertical plane, and placed inside three profiles slat and flap control system comprising series-connected power supply unit, fast actuator and the tracking actuator, the pressure sensor outputs are connected to the input electrical contacts servo actuator.

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