RU172806U1 - Rotating contact device with a movable "floating" stator bus and ball contacts - Google Patents

Abstract

A rotating contact device with a movable “floating” stator bus and power transmission through rolling friction. A useful model relates to methods for transmitting electricity in electrical engineering from a “fixed” part of a device to a moving rotating part. The technical result consists in reducing the wear of the contact pairs and the stability of the transition resistance during electric power transmission. The technical result is achieved by using rolling friction in the contact pairs instead of sliding friction with a constant pressing force of the contact pairs. To reduce the transition resistance, the maximum number of balls is set along the axial line of the tires (rings) of the rotor and stator, and to increase the contact area in the tires, radius grooves corresponding to the radius of the balls are made. To ensure the reliability of the wiring in the stator housing, fixed contacts are pressed, which are connected to the “moving” contacts on the bus by flexible conductors made of wires ПЩ or ПЩС. The proposed device provides continuous rotation clockwise and counterclockwise and can be used for transmission as a constant and alternating voltage in high current circuits.

Description

The utility model relates to current-transmitting devices. Electricity is transferred from the fixed part of the device to the moving part through various contact devices, by design. The movable part of the device (rotor) is made in the form of several rings with a single central axis of rotation.

The fixed part (stator) of the device can also be made in the form of slip rings with contact brushes or in the form of contact groups placed around the rotor rings. The location of the rings on the rotor can be vertical: in the form of separate rings with a common axis, or horizontal: in the form of concentric circles (rings).

Different stator designs are used depending on the rotor design.

There is also a VKU, in which power is transferred from vertically placed stator rings to vertically placed rotor rings using flexible rotating rings that are structurally installed between the stator and rotor rings in a vertical plane.

Known current collector device (RF patent No. 855808), containing a rotor and a stator with insulated flat and lobe contact rings placed on them.

The disadvantage of this device is the large wear of contact pairs and the formation of conductive dust.

A rotating contact device (RU 1091266) is known, comprising a housing, a rotor, movable conductive rings assembled in a rotor in a packet, motionless conductive rings concentric with it, fixed in a packet inside the housing, elastic conductive rings and separators are installed with radial interference between the rings in radial interference elastic conductive rings, each of the separators is made in the form of a set of carriages, each of which contains a pair of first rollers and a pair of second rollers installed with them in the same plane ikov, while the first rollers are in contact with the elastic conductive rings, the second - with the surfaces of the movable and stationary conductive rings.

The disadvantage of this device is the high resistance of contact pairs.

Among the known analogues of the claimed technical solution, the closest (prototype) can be a multi-channel sliding current collector containing a housing, inside of which there is a central shaft mounted on sliding bearings, fixed and moving parts and a current collection part from the group of kinematically connected to the housing and the central shaft and interacting between by means of flat and flap electrical contacts communicated through wires with external electrical connectors (patent RU 2 193810).

The disadvantage of this device is the large wear of contact pairs and the formation of conductive dust.

The technical result of the invention is to reduce the wear of contact pairs and to reduce the formation of conductive dust.

The inventive electric power transmission is carried out through a certain number of balls placed in the separator around the perimeter of the rings (tires) of the stator and rotor, while the stator is mounted on several coil springs, providing constant contact between the stator and rotor tires. In the tires of the rotor and stator, the contact surface is made taking into account the radius of the ball.

In the study of patent and other scientific and technical information, the author did not find sources containing a combination of distinctive features of the invention. At the same time, technical solutions are known that contain individual features of the claimed object, however, the properties and effect that these features inform these objects are different than in the proposed solution, therefore, the indicated differences are significant.

Known rotating contact devices contain contact pairs consisting of smooth conductive rings and sliding rings with contact petals, these rings being mounted on insulating substrates, some of which forming a rotating part can rotate relative to others, forming a fixed part of the device. The main disadvantage of VKU:

 quick wear of contact pairs;

 high electrical resistance of contact pairs;

 the appearance of conductive dust.

As a consequence of this - failure of the VKU as a result of overheating and wear of contact pairs.

Description of utility model.

To reduce the wear of the contacts during sliding friction, to reduce the transition resistance of contact pairs, as well as to reduce the formation of electrically conductive dust, the sliding contacts in the proposed design are replaced by rolling contacts. Balls that are constantly sandwiched between the stator and rotor tires by coil springs on which the stator rests.

This design solution allows to increase the contact area between the stator and the rotor due to the large number of balls, replace sliding friction with rolling friction, which significantly reduces the wear of contact pairs, as well as create a constant pressure force of the contacting pairs due to the small stroke (compression) of the springs, approximately 0 , 1 ÷ 0.4 mm, which will also constantly compensate for the wear of contact pairs by pressing the stator bus.

During operation, the stator tire will move slowly, approach the rotor tire, the wear process. To compensate for this movement, a fixed contact is pressed in the stator housing, which is connected to the stator moving contact by a flexible conductor (for example, ПЩ or ПЩС wire according to TU16-E05467-87, whose service life is at least 15 years).

The principle of operation of the proposed constructive solution is shown in Figure 1.

1. Stator P1.

2. Stator P2.

3. The rotor.

4. Balls.

5. Stator bus P1 on springs.

6. Stator bus P2 on springs.

7. The rotor tire for the stator P1.

8. The rotor tire for the stator P2.

9. The separator.

10. Bearing 1000820 GOST 8338-75.

11. Screed.

Claims (1)

A rotating contact device consists of a fixed stator and a rotating rotor, between which balls are installed in the separator, which provide electric power transmission through rolling friction, while to create a constant pressure between the ring tires of the stator and the rotor through the balls, the stator bus is supported by coil springs, which are installed in the stator housing, fixed contacts are crimped in the stator housing and connected to the moving contacts of the stator bus by flexible wires.

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