SU1647724A1 - Device for power supplying movable load - Google Patents

Abstract

The invention relates to electrical engineering, namely to the power supply of rail vehicles receiving electric power via a flexible cable. The purpose of the invention is to improve the reliability of the cable. On the shaft 1 of the cable drum 4 an energy store is mounted, made in the form of a spiral spring, one end of which is fixed on the shaft 1 of the cable drum and the other end on the housing of the brake drum 9 coupled to the shaft 1 of the cable drum via bearings. On the vehicle there is a brake with the possibility of acting on the brake drum 9 when the switch 15 interacts with the guide 17. installed along the track at the point of attachment of the energy carrier to the soil 16. The length of the guide 17 is chosen such that on the path from the bridge brake actuation before passing the receiver 6 to the point of attachment of energy carrier soil swirled coil spring 16 until equal in magnitude to the drive torque transmitted to the shaft 1 of the cable reel 4 hydraulic motor yl 3 February g

Description

FIG. one

77rSSS

16/56

The invention relates to electrical engineering, namely to the power supply of vehicles, and can be used in rail transport that is powered by electric power through a flexible energy carrier.

The purpose of the invention is to increase reliability by reducing the dynamic loads on a cable fixed in the middle part of the track, while changing the direction of rotation of the cable drum.

FIG. 1 shows a rail vehicle with a cable drum mechanism; in fig. 2 - cable drum mechanism; in fig. 3 is a section A-A in FIG. 2.

The device for supplying power to the mobile consumer comprises a shaft 1 driven by a hydraulic motor 2 through a chain transmission 3, a drum 4 for energy carrier 5 fed through a receiving device b and laid using a cable layer 7. Through bearings 8 with a shaft an interface of the brake drum 9 inside which spiral spring 10 is installed, is fastened at one end to the shaft and to the other end to the brake drum body. The brake drum housing encloses a belt brake consisting of a belt 11, a lever 12, an electromagnet 13 and a return spring 14. The belt brake is controlled by turning the electromagnet on when the switch 15 hits the 16 position set at a fixed point of the cable. guide 17. At the same time, the length of the guide is chosen so that on the way from the place of the brake to the passage of the vehicle’s receiving device the point of fixing the energy carrier to the ground Created by a spring, would be equal to the moment transmitted to the shaft 1 by the hydraulic motor 2 through the chain transmission 3.

The device works as follows.

A vehicle receiving energy from a flexible energy source is equipped with a device for supplying power to a mobile consumer. The total length of the route serviced by such a vehicle can be equal to twice the cable capacity of the drum. At the same time, the point of consolidation of the energy carrier to the soil is located in the middle of the route.

For the coil spring 10, the outer end of which is fixed on the body of the brake drum 9 is rigid to the belt, which works for a clean bend:

where p is the angle of rotation of the cable drum shaft;

MPR - the moment generated on the shaft of the cable drum coil springs;

L is the length of the unfolded spiral spring;

E is the modulus of elasticity of the material of the spring;

Ix - moment of inertia of the spring section

 bS3.

12

b - spring width; S is the spring thickness. If n is the speed of the cable drum, then p 2 Lt, MnaL

from here p

2 E Ix

(one)

I

The half length of the guideway k-is equal to the length of the energy carrier 5 wound on the cable drum 4 from the moment the brake is actuated until the receiving device 6 passes the point of attachment of the energy carrier to the soil 16:

  ,

 2nR n

(2)

where I is the length of the cable wound on the cable drum;

R is the radius of the cable winding on the cable drum while the vehicle passes the cable anchorage point to the ground.

Substituting (1) into (2), get

1 2 n R MnPL

2 n 2 n e x

or

MnpL Elx

I 2 R

(3)

During the moment when the receiving device passes the point of energy carrier fixing to the soil, the moment created on the shaft of the cable drum by the spiral spring, the MPR must be equal to the drive torque on the shaft of the cable drum M. Equalization and substitution in (3)

M l

get I 2 R .- L 1x

If we denote 1h, the projection of the distance between the switch 15 and the vertical axis of symmetry of the receiving device 6 onto a vertical plane parallel to the longitudinal axis of the vehicle; And - part of the length of the guide 17 from its beginning to the point of fixing the cable to the soil 16 (in the direction of movement of the vehicle (Fig. 1); d - the remaining part of the length of the guide 17 of the point of securing the cable to the soil 16 to its end, then the case depicted in Fig. 1

eleven

(four)

(five)

If the switch 15 is installed to the right of the receiving device 6 (Fig. 1), then in expressions (4) and (5) the signs are reversed. For the case when the switch 15 and the vertical axis of symmetry of the receiving device 6 are in the same plane perpendicular to the longitudinal axis of the vehicle (i, e.)

.- 1 -R ML

11-12-2 TT7

For example, rail transport

the means is moving in the direction requiring the cable to be wound on the drum, i.e., to the point where the energy carrier is attached to the ground. At a certain distance from the point of consolidation of the energy carrier to the soil 16, the switch 15 hits the rail 17 installed along the track and gives a signal to activate the electromagnet 13 of the band brake. The lever 12 rotates and presses the belt 11 against the body of the brake drum 9, locking it against the frame of the vehicle. The coil spring 10, fastened at one end to the brake drum body and at the other end to shaft 1, begins to twist. This occurs until the potential energy stored in it creates a counter-moment equal in magnitude to the driving moment on the shaft 1 of the cable drum 4 transmitted from the engine 2 through the chain transmission 3, i.e., until the cable drum stops. In this case, as the spring is tightened, the tension of the cable decreases, since the sum of the moments created by the tension of the cable and the coil spring is equal to the drive torque on the shaft of the cable drum. This is true for drives that provide constant torque (for example, volumetric motors). The cable drum must stop when the receiving device 6 is above the point of fixing the energy carrier to the soil 16. In order for the cable drum to rotate in the opposite direction (to unwind the energy carrier) during further non-stop movement of the vehicle, such a tensile force should occur in the energy carrier, which creates on the shaft 1 a torque sufficient to overcome the inertia of the drum 4 filled with energy, and, after the hydraulic motor 2 goes into pumping mode,

switching a special hydraulic valve (not shown) to the braking of the cable drum.

The energy accumulated by the spiral spring allows to significantly reduce the tensile force that occurs in the energy carrier when the vehicle passes the anchorage point of the energy carrier in the soil, and also contributes to a more rapid acceleration of the completely filled cable drum to the required angular velocity.

As the vehicle moves further, the switch 15 stops in contact with the guide 17, the electromagnet 13 de-energizes and under the influence of the return spring 14 the lever 12 takes up its original position and retracts the tape 11 from the brake drum 9,

0 which begins to rotate with shaft 1.

When the vehicle is moving along the same path in the opposite direction, the length of the corresponding section of the guideway 5 (from its beginning to the point of fixing the cable to the ground) is chosen from the same considerations as in the forward direction. The length of this section of the guide is more than the opposite.

0 by the amount of double distance between the switch 15 and the point of exit of the energy carrier from the receiving device 6.

In connection with the accumulation of energy by the spiral spring when the vehicle passes to the point of anchoring the energy carrier to the soil and the subsequent return of stored energy to accelerate the rotating masses of the cable drum mechanism when it is reversed

Claims (1)

0 significantly increase the reliability of the flexible energy carrier by reducing the dynamic loads acting on it, which arise when the vehicle passes the anchorage point of the carrier energy to the soil. The magnitude of these loads exceeds the average values of 5-10 times. The invention The device for the supply of power to the mobile user, containing 0 cable drum, the shaft of which is kinematically connected to the drive, energy storage device, made in the form of a flat spiral spring, the outer end of which is fixed on the inner surface 5 of the housing of an additional drum rotatably mounted relative to the shaft of the cable drum, and means for varying the speed of rotation of the additional drum depending on the position of the consumer relative to  securing the cable on the ground in order to increase reliability by reducing the dynamic loads on the cable fixed in the middle part of the route when the cable drum rotation direction is changed, it is equipped with a guide along the route in the area of the cable's point of attachment to the soil, the inner end of the flat spiral spring is fixed on the shaft of the baoabans, the means for changing the rotational speed of the additional drum are made in the form of a brake controlled by the newly introduced switch, copulating with mozh- i Ostia in engagement with the guideway while the latter is provided with length i L you sh, eight. eleven 0 five   2 R ML | - l to tg1 t Ix where R is the radius of winding the cable onto the drum while the vehicle passes the cable anchorage point in the soil; M - drive torque on the cable drum shaft, L is the length of the open coil spring, E is the modulus of elasticity of the material of the spring, x moment of inertia of the spring sech, i - bS3 ix 12 (de in - the width of the spring; S - the thickness of the spring. LJ; “, i - L i , BUT shg Esikakshvpz