RU44426U1 - DEVICE FOR STABILIZING CONTACT PRESSURE OF A SURFACE RECEIVER - Google Patents

Abstract

The purpose of the proposed device is the stabilization of contact pressing by reducing its aerodynamic component. A device for stabilizing contact pressing of a current collector, comprising moving frames, lifting springs and carriages with current-collecting elements, a pressure sensor, a unit for comparing the magnitude of contact pressing, a signal amplifier, a drive connected to an aerodynamic screen located on the roof of the locomotive in front of the current collector in the direction of movement of the rolling stock. If the contact is deviated from the set value, the drive rotates the screen to the position at which the specified deviation is eliminated.

Description

The device relates to electrical equipment of vehicles with electric traction.

Currently, standard current collectors of heavy and light types are used on the electric rolling stock of the main railways. At speeds exceeding 160 km / h, these current collectors cannot provide the necessary quality of current collection. This is due to the growth of the aerodynamic and inertial components of contact pressing.

Increased aerodynamic lift forces negatively affect the quality of current collection. Contact pressing increases, mechanical wear of contacting elements increases, the likelihood of unacceptable squeezing of contact wires and emergencies increases. An increase in the inertial component of contact pressing leads to instability of the contact, frequent detachment of the current collector from the contact wire, the occurrence of arcing and electric arc, unacceptable radio interference in communication lines, and burning of contact wires.

A device is known that compensates for the aerodynamic effect on the current collector by installing a fixed reflector screen in front of the current collector in the direction of movement of the rolling stock. The specified device is a prototype of this.

However, this device reduces the aerodynamic lift only in a limited range of speeds and does not take into account the nature of the aerodynamic forces at different values of the height position of the current collector.

The purpose of the proposed device is the stabilization of contact pressing by reducing its aerodynamic component.

The device is shown in the figure.

The current collector contains movable frames 1, held in the upper working position by lifting springs 2, a carriage 3 with collector elements 4. An aerodynamic screen 5 is installed in front of the current collector 5. The current collector skid is equipped with a pressure sensor 6 connected to the comparison unit 7. The comparison unit through the signal amplifier 8 is connected to a drive 9, which is connected by an aerodynamic screen 5 pivotally mounted on a rolling stock with the possibility of rotation around a horizontal axis.

The device operates as follows.

Sensor 6 measures the amount of pressure at the contact point "runner - contact wire". The signal from the sensor is supplied to the comparison unit 7, in which the deviation of the measured contact pressure from the set value equal to the static pressure is estimated. If the contact pressing is greater or less than permissible, a signal is transmitted through the amplifier 8 to the drive 9. The drive changes the angle of inclination of the aerodynamic screen 5.

In the case when the contact pressing is greater than the specified one, the aerodynamic screen rises, directing the air flow over the current collector. In this case, the value of the aerodynamic component of the contact pressing decreases, therefore, the contact pressing itself also decreases.

Thus, this device provides stabilization of contact pressing within predetermined limits by changing it

aerodynamic component in the entire range of speeds of the rolling stock and takes into account the nature of the aerodynamic forces at different values of the height position of the current collector.

Literature

Pat. 237679. Austria, MKI ⁵ B 60 L 5/00. Current collector / E. Pfizenmeier.

Claims (1)

A device for stabilizing contact pressing of a current collector, comprising a current collector mounted on a rolling stock, equipped with movable frames with lifting springs and carriages with current collecting elements, and an aerodynamic reflector installed in front of the current collector along with the current collector, characterized in that the current collector is additionally equipped with a pressure sensor for pressing current collection elements to the current lead, the output of which through the comparison unit and amplifier is connected to a drive associated with an aerodynamic screen m pivotally mounted on rolling stock with the possibility of rotation around a horizontal axis.