SU989633A2 - Current collecting device for transmitting signals of measuring transducers from rotating shaft - Google Patents

Description

(54) CURRENT DEVICE FOR TRANSMITTING SIGNALS OF MEASURING SENSORS FROM ROTATING SHAFT

one

A current collector for transmitting signals from measuring sensors with rotating from the shaft is related to load measuring technology and can be used in any branch of nar; for example, in tractor engineering, mechanical engineering, and shipbuilding for transmitting signals from measurement sensors from a rotating shaft.

According to the main author. St. No. 9О2127 known collector for; transmitting signals from measuring sensors with a rotating shaft, containing a rocker arm, brush holders and spring-loaded brushes; in each of the contact rings, the brush holders at the interface to the yeromoid are mounted sariirno relative to the latter, possibly moving the brushes along the normal to the surface of the contact ring; screw with fixing.tor spring, installed in its lower part, and the sheath

are located relative to each other at an angle, taken from

p.ci. (2c., i)

180

wherein }

4tfb

where oC is the central angle formed by the inner edges of the brushes, graph

(L is the central angle formed by the inner edges, brushes, schzad; P is the number of components

contact ring, pcs; H is the central angle (sector) occupied by a single brush, deg. However, there are significant drawbacks in the device, consisting in the fact that during periodic measurements the measurement of the firing and bending moments and other metrological characteristics is periodic, the brushes on

all the time the device is in use, it is in constant mechanical contact with the contact rings, leading to premature brush deposition, as well as contamination of the contact rings, leading to a change in the transient resistance. In addition, the constant mechanical contact causes some wear of the contact rings, which, in the presence of axial displacement of the shaft, which always takes place on the rotating shaft, also leads to a change in the transient resistance, which significantly reduces reliability and measurement accuracy.

The purpose of the invention is to increase the reliability of the device and increase the service life of the brushes.

This tselk is achieved by the fact that the device is equipped with a drive made in the form of an eccentric located on one axis and a gear wheel which is in engagement with a gear sector with a movable handle, and a spring-loaded rocker arm mounted with the possibility of radial movement along guides relative to the contact ring .

The drawing shows a structural diagram of the proposed device.

It contains a yoke 1, brush holders 2, consisting of a lever 3 and a holder 4, springs 5, brushes 6, clamps 7 prunsins 5, slip rings 8, adjusting screws 9, eccentric 10, gear 11, toothed sector 12, movable handle 13, the return spring 14 and the guides 15. The lever 3 is installed at the interface with the rocker 1 with the ability to move the brushes along the normal to the surface of the contact ring 8. The eccentric 1O is located on the same axis with the gear wheel 11 that engages with the gear sector 12. The beam 1 is installed with the possibility radial movement along the guides 15 relative to the contact ring 8 and spring loaded by the return spring 14.

The device works as follows.

In the initial position, when measuring any metrological characteristics on the rotating shaft, the handle 13 is in the brush on position, the eccentric 10 is lowered, the brushes 6 as a result of the impact of the spring 14 on the yoke

Lo 1 is in contact with the ring 8. The signal from the output of the measuring sensor through the ring 8 and the brush 6 is fed to the output of the device.

After measuring the metrological characteristics, the handle 13 is set to the brush off position. turning it from one extreme position to the other, causing the sector 12 to rotate at a certain angle, and the gear wheel 1 i is rotated 180 °, which, in turn, causes the eccentric 10 to turn also 180 ° . The eccentric 10 moves the rocker arm 1 along the guides 15 during rotation (lifting), and the brushes 6 are raised and come out of contact with the ring 8. While turning the handle back to the brush on position. The brushes 6 are returned to their original position by the action of the return spring 14, ensuring reliable contact of the measuring sensor with the output of the device.

As a result of the fact that the device is equipped with an actuator consisting of an eccentric located on one axis and a gear wheel which is in engagement with the toothed sector with a movable handle, and a spring-loaded rocker arm mounted for movement along guides relative to the contact ring, the reliability of operation increases. devices and increased brush life.

Claims (1)

1. USSR author's certificate No. 902127, cl. H 01 R 39 / 4O, 198O.