RU42483U1 - VEHICLE SURVEY - Google Patents

Abstract

The purpose of the proposed device is to improve the quality of current collection by stabilizing contact pressing. A vehicle current collector containing movable frames mounted on the main shafts and held in the upper working position by lifting springs, a carriage with collector elements, and aerodynamic screens mounted on a system of movable collector frames with the ability to rotate on horizontal rods, a pressure sensor, a unit for comparing the measured and predetermined values of contact pressing and electric motor spruce.

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 sufficiently provide reliable and high-quality current collection. This is due to the increase in aerodynamic effects on the current collector, the magnitude of which is proportional to the square of the speed, as well as the achievement of the rate of occurrence of resonant oscillations in the "current collector - contact suspension" system. As a result, the instability of contact pressing increases. An overestimated value of contact pressing leads to intensive mechanical wear of the contacting pairs and inadmissible squeezing of the contact wire. An underestimated value of contact pressure leads to intense electrical wear of the contacting pairs, the occurrence of sparking and electric arc, burnout of the contact wire.

A device is known that compensates for the aerodynamic effect due to the use of aerodynamic screens mounted on a system of moving frames of the current collector. The specified device is a prototype of this.

However, this device only compensates for the aerodynamic effect on the current collector, not taking into account the magnitude of the contact pressing,

which is the main criterion for high-quality and reliable current collection.

The aim of the proposed device is to improve the quality of current collection due to the stabilization of contact pressing.

The device is shown in the figure.

The current collector comprises movable frames 1 mounted on the main shafts 2 and held in the upper working position by lifting springs 3, a carriage 4 with current collecting elements 5, and aerodynamic screens 6 mounted for rotation on horizontal rods 7. The current collector skid is equipped with a pressure sensor 8 connected with the comparison unit 9. The electric motor 10 is connected to the horizontal rods 7 through communication 11.

The current collector operates as follows.

Sensor 8 measures the amount of pressure at the contact point "runner-contact wire". The signal from the sensor enters the comparison unit 9, in which the value of the measured contact pressure is compared with the set values. If the contact pressing is greater or less than permissible, a signal is sent to turn on the electric motor 10. The electric motor through the connection 11 rotates the front aerodynamic screen 6.

In the case when the contact pressing is greater than the specified one, the aerodynamic screen rotates clockwise, takes an inclined position and creates a lowering force. Thus, the magnitude of the contact pressing is reduced.

If the contact pressure is less than the specified one, the aerodynamic screen rotates clockwise, creates a lifting force and increases the contact pressure due to the aerodynamic component.

The design is assumed to be symmetrical.

Thus, this device provides automatic control of the magnitude of contact pressing within predetermined limits for any direction of movement of the electric rolling stock due to changes in its aerodynamic component.

Literature

A.S. 706263 USSR, MKI ⁵ B 60 L 5/00. The current collector of the vehicle / I.A. Belyaev, V.A. Vologin, A.K. Kuznetsov, G.P. Maslov, V.M. Pavlov, B.A. Kharchenko.

Claims (1)

A vehicle current collector comprising movable frames mounted on the main shafts and held in the upper working position by lifting springs, a carriage with current collector elements and aerodynamic screens mounted on a system of movable current collector frames with the possibility of rotation on horizontal rods, characterized in that it is additionally introduced a pressure sensor, a unit for comparing the measured and predetermined magnitude of the contact pressure and an electric motor, the pressure sensor mounted on the current collector runner ika connected to the input of the comparison between the measured and predetermined values of contact pressure, the output of comparator unit the measured and predetermined values of contact pressure is connected to the trigger mechanism of the motor, and the motor shaft connected with aerodynamic screens mounted on movable frames susceptor system.