RU2662220C2 - Current-transmission element - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: current-transmitting element is intended for use in the current collectors, which provide for power transmission or transmission of electric signals from the fixed element of the structure to the rotating element or in the opposite direction. Current-transmitting element can be used in current collectors of excavators, load-lifting mechanisms, telescopes, rotary antennas, wind generators. In order to transfer electricity from the fixed part of the current collector to the moving part in this current-transmitting element the rotation bodies are applied, which provide for the constant electrical contact between the moving and stationary part of the current collector.

EFFECT: this allows to exclude from the structure of the current collector such wearing parts and unreliable parts, as the brush and brush assembly, as well as the possibility of using the current-transmitting element in a wide range of speeds of moving current-transmitting surfaces; this also provides for the increased reliability, simplifies the construction and operation of the current collector in comparison with the existing analogues.

1 cl, 4 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of electrical engineering and is a part of a current collector, current collector, current junction or other current-transmitting device that performs the function of transmitting electricity and (or) electrical control signals from the fixed part of the above structures to their moving part. This method can be used in current collectors, current collectors, current junctions of synchronous generators and synchronous motors, propeller shafts, excavators, load-lifting mechanisms, telescopes, rotary antennas, wind power generators, etc.

State of the art

A multi-channel sliding current collector is known, comprising a cylindrical housing, inside which a central shaft mounted on bearings is placed, and a current collecting part from the group of kinematically connected to the central shaft and interacting rotary and non-rotary electrical contacts grouped into a block and communicated by wires with external electrical connectors through output channels for laying wires (patent RU No. 2351044, H01R 39/00 2006.01). Non-rotatable electrical contacts are made in the form of combs with vertically oriented tabular contacts in the direction of rotary contacts. Rotary electrical contacts are made in the form of flat metal rings.

Electric power transmission in this device occurs due to the sliding of the petal electrical contacts along the flat rings. The petal contacts used in this device have a very small contact surface, which makes it impossible to transfer any significant electrical currents through the contact pairs. In addition, the wear of the tab contacts makes the use of this device ineffective at high speeds of rotation, requires periodic replacement, limits the service life, reduces the reliability of this current collector and complicates its operation.

A current collection device is also known that contains two or more pairs of the fixed part of the product located in the radial direction and movable with insulated flat and flap contact rings placed on them, communicated via wires with external electrical connectors (patent RU No. 2267840, H01R 39/00, 2006.01) .

In this device for the transmission of electricity and electrical signals in one phase (channel), one flat and two flap rings are used. However, due to the fact that the contact surface between the flat and lobe rings is small in area and has gaps, firstly, to transmit an electric signal (current) through one channel (phase), you have to use two lobe rings in addition to one plane secondly, for the transmission of electric current with a power of 120A, 4 groups of such rings have to be used per phase. This leads to an increase in the dimensions of the structure along the axis of rotation. In addition, the wear of the tab contacts makes the use of this device ineffective at high rotation speeds, limits the service time and reduces the reliability of this current collector.

Of the known analogues of the claimed technical solution, the closest prototype is a current collection device containing movable and fixed coaxial electrodes, conductive rings in contact with the movable and fixed electrodes, and elastic elements, equipped with two rolling bearings placed radially inside the conductive rings installed between the movable and fixed electrodes, and interacting with their axes with elastic elements, and the outer diameter of the conductive rings is equal to the difference ontaktiruyuschih radii of coaxial electrodes (patent RU №2277277). The implementation of this design in practice is significantly hampered by extremely high requirements for the accuracy of manufacturing such parts as coaxial electrodes and conductive rings. The outer diameter of the conductive rings and the contacting cylindrical surfaces of the coaxial electrodes should be made and assembled with almost no errors, which, as is known in practice, is not possible. In the case of manufacturing these parts in real conditions, for the above-mentioned current-collecting device to work, it is necessary that the conductive rings are flexible and that it is possible to deviate their shape from the correct circle during operation of the device.

This condition imposes restrictions on the cross section of the conductive rings, and accordingly on the amount of current transmitted through this device. In addition, at significant rotational speeds (more than 1000 rpm), flexible conductive rings will undergo rapid wear.

The design of the proposed current-transmitting element eliminates the use of flexible conductive elements, and also does not impose special conditions on the accuracy of manufacturing of component parts. The absence of parts that change their shape during operation allows for reliable operation at high speeds of current-transmitting elements.

Disclosure of invention

The objective of the invention is:

1. An increase in currents transmitted through a current collector, current collector, current junction or other current-transmitting device.

2. The possibility of using a current-transmitting element in a wide range of speeds of motion of moving current-transmitting surfaces relatively motionless.

3. Improving the durability and reliability of structures in which a current-transmitting element is used.

This is achieved in contrast to the known technical solution due to the use of solids of revolution, each of which does not change its dimensions when the device is in operation. These bodies of revolution are capable of maintaining constant contact with current-transmitting surfaces and with each other by changing the relative position, thereby providing constant inextricable electrical contact of the moving and stationary current-transmitting surfaces.

Description of drawings

Figure 1 and figure 2 (section along the plane AA) shows a current-transmitting element in the case of rectilinear movement of the current-transmitting surfaces with a speed V. Figure 3 and figure 4 (section along the plane AA) shows the current-carrying element in the case of rotation of the current-carrying surfaces each other with angular velocity W.

The implementation of the invention

The device contains bodies of revolution of the first group (1, 2), bodies of revolution of the second group (3, 4, 5), bodies of revolution of the third group (6, 7), axis (8, 9, 10, 11, 12, 13, 14) , springs (15, 16, 17, 18), plates (19, 20).

The device operates as follows.

Electricity and (or) electrical signals from a moving current-transmitting surface (in Figure A) are transmitted to adjacent rotation bodies (1 and 2) of the first group, rotating around the axes (8, 9). Then the electric power and (or) electric signals are transmitted from the bodies of revolution of the first group to the contact bodies of rotation of the second group (3, 4, 5) that rotate around the axes (10, 11, 12), then the electric power and (or) electric signals are transmitted from bodies of revolution of the second group to adjacent bodies of revolution of the third group (6 and 7), rotating around the axes (13 and 14) and further from bodies of revolution of the third group, electricity and (or) electrical signals are transmitted to a stationary current-transmitting surface (in Figure B ) It is possible to transfer electricity and (or) electrical signals in the opposite direction. Essential is the ability of the device to maintain constant contact between the current-carrying surfaces, the bodies of revolution of the first, second and third groups, regardless of the accuracy of manufacture and assembly of the current-carrying surfaces. The bodies of revolution of all three groups, as can be seen from figures 1, 2, 3, and 4, remain in contact with each other and with current-transmitting surfaces when the distance H between the current-transmitting surfaces changes (due to both the inaccuracy of the manufacture and assembly of current-transmitting surfaces, and specifically embedded in the structure) by pressing them against each other and to the current-transmitting surfaces by springs 15, 16, 17 and 18. The plates 19 and 20 prevent the axial displacement of all three groups of bodies of revolution relative to each other.

Claims (1)

A current-transmitting element for transmitting electricity and (or) electrical signals from a fixed current-transmitting surface of a current collector, a current collector, a current junction to its moving current-transmitting surface or in the opposite direction, consisting of three groups of bodies of revolution freely rotating on the axes, each of these three groups includes at least one body of revolution, and the first of the above groups consists of bodies of revolution, simultaneously tightly adjacent to one of the current-transmitting surfaces of the current collector, and to at least one body of revolution included in the second group, and the second group of bodies of rotation consists of bodies of revolution, simultaneously tightly adjacent to at least one body of revolution included in the first group, and to at least one body of revolution included in the third group, and the third group of bodies of revolution consists of bodies of revolution, simultaneously tightly adjacent to another current-transmitting surface of the current collector, and to at least one body of revolution, which is part of the second group, characterized in that the electrical contact between the tocop Reda surfaces provided by the fact that the rotation of the body which are a part of all three groups, are pressed against each other and to the surfaces tokoperedayuschim springs forming part tokoperedayuschego element.

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