SU1474773A1 - Current collector - Google Patents

Abstract

The invention relates to devices for transmitting electrical signals between parts rotating one relative to another. The purpose of the invention is to increase the reliability of the contact, the durability of the device and the possibility of controlling the contact force. The device contains groups of contact elements in the form of a rotating inner contact ring 3 and a screw current-collecting spring 6, inside which a pressing spring is placed coaxially with the winding direction opposite to the winding-spring of the current-collecting spring. The ends of both springs are fixed on cylindrical holders 8, which are rotatably mounted around the axis in the trunnions 9. The trunnions, in turn, are rotatably mounted on the ends of the outer ring, which is placed in the device body with the possibility of linear movement in the direction of the radius of the slip ring 3, passing through the middle of the spring 6. Inside the pressing spring, there is a liner 14, connected tightly 15 with a gramometer. The liner and the ha are made of insulating material. Wires from rotating parts are soldered to the internal slip rings, and wires connected to the fixed parts of the mechanisms or to the recording equipment are connected to the ends of the screw collector springs. Electrical signals from parts of mechanisms rotating together with the shaft are transmitted through wires and contact rings to stationary spring-collecting springs and further along wires attached to the springs to stationary parts of mechanisms or vice versa. 2 hp f-ly. 3 il.

Description

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The invention relates to electrical engineering, in particular, to the creation of current-collecting devices, designed to transmit electrical signals from objects moving relative to each other.

The aim of the invention is to improve the reliability of the contact, the durability of the device and the possibility of controlling the contact force.

Figure 1 shows the collector device, a General view; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2.

The current collector contains, in the housing 1, groups of contact elements 2, each of which is made up as an internal contact ring 3 installed coaxially on the rotating shaft 4 and on the dielectric bushing 5, with the ring 3 contacting the coil spring 6, inside which is coaxial It has an arc holder in the form of a pressing spring 7 with a winding direction opposite to the winding direction of the spring 6 in order to exclude the inter-turn engagement of the springs. The ends of both springs 6 and 7 are fixedly mounted on additionally introduced cylindrical holders 8, which are rotatably mounted around their axis.

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The threads on the additional pins 9 and are secured with nuts 10. The pins 9, in turn, are mounted with the possibility of swinging on the ends of the outer cover consisting of fork dielectric rods 11 fixed in a split threaded rod 12, which placed in the housing 1 with the possibility of linear movement in the direction of the radius of the contact ring 3, passing through the middle of the collector spring 6, the hollow screw 13. Inside the pressing spring 7 is placed an additional liner 14 of insulating material connected 15 and a ring 16 with a gramometer (not shown). Wires 17 from rotating parts (together with shaft 4) of parts of mechanisms are soldered to rings 3, and wires 18 connected to fixed parts of mechanisms or to recording equipment (not shown) are connected to ends of collector springs 6. Each contact element 2 is attached to housing 1 with two screws 19. To ensure reliable operation of the device, the spring 6 is made of a zirconium alloy with good antifriction and conductive properties.

The device works as follows.

The electrical signals from the parts of the mechanisms rotating together with the shaft 4 are transmitted by wires 17 and a slip ring 3 to fixed stationary springs 6 and further along wires 18 to stationary parts of mechanisms or vice versa.

Depending on the speed of rotation of the shaft 4, the parameters of the transmitted electrical signals and the permissible interference, for example, an oscilloscope is used to determine the optimum contact pressure between the ring 3 and the spring 6, which ensures reliable switching of the transmitted signal with permissible interference. The said contact pressure is adjusted by linear movement in the outer casing with a current-collecting spring, for this using a screw 13 mounted in the housing 1, is moved in the direction of the radius of the contact ring 3 passing through the middle of the spring 6 (to or from the shaft 4) , bar 12 with dielectric rods 11 and pins 9; then, using the insert 14, the plugs 15 and the rings 16 determine by a grammeter the force of pressing the springs and expose it (using the gramometer) on the rest of the group of contact elements 2.

When the device transmits electrical signals (especially at high speeds), the wear of the rubbing surface of the springs 6 increases. The durability of the device is ensured by turning the springs 6 in any but equal direction (from both ends with holders 8 around their axes in the trunnions 9, which can swing in the outer cage rod 11, thereby putting into operation the new sections of the coils of the spring 6, the new position is fixed by nuts 10. To replace the failed contact elements 2, it is enough to unscrew the two screws 19 and remove them from the device.

The use of the proposed collector as compared with the known one has the advantage of greater reliability of contacting, since in the known device arc holders rotating on the housing relative to the axis of the collector ring in the tangential direction do not provide uniform contact force

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the contact surface, while in this device the movement of the arc holder normal to the contact surface is ensured, the ability to adjust and determine the required contact pressure between the contact ring and the screw current-collecting spring.

In addition, the device has the best operating conditions, since its design makes it possible to easily and quickly replace broken contact elements (without disassembling the entire device).

The device has greater durability due to the possibility of rotation of the screw current-collecting spring around its axis with the help of holders for putting new sections of the current-collecting spring into operation.

Claims (3)

1. A current collection device comprising groups of contact elements mounted in a housing, each of which is designed as an inner contact ring with which a current collecting spring contacts a screw, inside of which is placed an arc holder connected to the outer housing installed in the housing, in order that, in order to increase the reliability of the contact, the outer sleeve is mounted in the housing with the possibility of linear movement in the direction of the radius of the slip ring passing through the middle of the current collection spring, while the arc holder is made in the form of a pressing spring with the direction of winding opposite to the direction of winding of the collector spring. 2. The device according to claim 1, characterized in that, in order to increase the durability of the device, the ends of the current-collecting and pressing springs are fixedly mounted on the additionally inserted cylindrical holders that are mounted to rotate around their axes in additional trunnions that can be rotated on outer ring 3. The device according to claims 1 and 2, characterized in that, in order to ensure the possibility of contact 1474773 e6 the role of contact force, inside the priory, which is supplied with an insulating the pressing spring is additionally step-by-step, designed to communicate with The liner of insulation material is placed .1 6-B turned a grammeter