SU1359827A1 - Current collector - Google Patents

Abstract

The invention relates to electrical engineering. The goal is to increase the work resource. The contacting part of the leaf spring - the pressure element of the current collector has a V-shaped cross section, and the ratio of its length to the length of the cantilever part of the pressure element is selected within 5. The current collector is additionally provided with a damping element implemented in the form of a length of tube that is loosely mounted on the cantilever part of the pressure element, with the ratio of the length of the damping element to the length of the cantilever part of the pressure element being in the range of 0.4-0.6. 1 nl 00 ate from 00 th

Description

This invention relates to electrical engineering, in particular, to current collection devices of low-power collector electric matins.

The drawing shows the proposed design of the collector device.

The device comprises a collector 1 of an electric machine, a leaf spring — a pressure element 2 of a collector device, a damping element 3, a contacting part 4 of a leaf spring 2; cover 5 of the electric machine; current-supply water 6,

The collector device operates as follows.

The electrical voltage supplying the motor shaft is supplied to collector 1 by current supply 6 (in the case of a generator, electrical energy produced by the core is removed from collector I by current supply 6 Plate spring - the pressure element 2 of the collector provides the necessary contact force at the interface of the contacting V-shaped part 4 of leaf spring 2 with collector I of electric machine for reliable electrical contact. Damping element 3 freely mounted on the cantilever part the lamellar spring - pressure element 2, provides suppression of oscillations arising in the collector-brush unit of the electric machine,

In the proposed construction of the collector, the contacting part 4 of the leaf spring - the pressure element 2 has a V-shaped cross-section, which provides the necessary service life as the contacting part 4 is abraded,

If the ratio of the length of the contacting part 4 with a V-shaped section to the cantilever part of the pressure element

- 0.3, then the contact area is reduced

.

current collector with

the collector of the electric machine, which leads to a bully and increased wear of the collector, vibrations of the collector-precise node and reduced resource life of its

If the ratio is -, 5, then reducing the brush mobility by 1 due to the elevation

inertial mass at the end of the cantilever part of the leaf spring, which also leads to increased wear of the collector and reduces the service life of the collector-brush unit of the electric machine. Therefore, in the proposed construction of the collector device, it is necessary to structurally ensure this ratio in the range of 0.3-0.5, given that the collector device is additionally equipped with a damping element 3, made in the form of a segment, for example, a PVC tube that is loosely worn on the console part of the pressure element 2,

If the ratio of the length of the damping element 3 to the length of the console part of the pressure element

 0.4,

THAT

the damping property of the element 3 decreases, since it has considerable mobility along the cantilever part of the pressure element 2, the vibration of the collector-brush assembly is extinguished inefficiently, which leads to its -. increased wear and reduced service life, as well as reduced efficiency of the electric machine.

If a

an attitude

X If

 0.6 then demhg

The molding properties of element 3 are also reduced, since it has limited mobility, which also leads to increased wear of the collector-brush assembly, a decrease in its service life and a decrease in the efficiency of the electric machine. Therefore, in the proposed instruction of the collector device, it is necessary to provide constructively

relation - within, 6,

1ts

These tests were carried out on micro motors with a power of 0.5 W with a supply voltage of 2.4 V with various design options for the collector device.

Example 1 A test of 50 microelectric motors was carried out, 25 of which were equipped with a collector with a pressure element made in the form of a plate spring, a rubber, the contact part of which had no V-shaped section, the length of the cantilever part of the pressure element 1 15 mm, 25 other microelectric motors had current-collecting devices with lamellar springs, contacting with the collector, parts of which had V-shaped sections, Damping elements of PVC tubes are identical, constructive

1st

parameters - 0.4

The test results are presented by

i About 5

: - and, 3,

flax in tabl, 1,

Example 2, Tested 5 batches of microelectric motors of 25 in each batch. Moreover, the current collection device had a pressure element - a plate spring with a V-shaped cross section of the contacting part, with a damping element, similar to Example 1, with a constructive parameter

G-- 0.5, Constructive from batch to k

batches varied parameter - ratio (.

The results of the tests are presented in Table 2,

Example 3, 5 batches of microelectric motors, 25 in each batch, were tested. The collector device had a pressure element - a plate spring with a V-shaped cross section of the contacting part, with a design parameter 0.4, Structurally, from batch to batch, the parameter - ratio

The test results are presented in table, 3,

Claims (1)

Invention Formula A current collection device comprising a pushing element, molded in the form of a leaf spring, comprising a cantilever part and a contact part, which interacts with a collector, characterized in that, in order to increase the service life, the contact part is V-shaped, and the ratio of the lengths of the contact part to the length of the cantilever part of the leaf spring is chosen to be 0.3, 0.5, and the device is also equipped with a damping element, made in the form of a tube, freely mounted on the cantilever part of the leaf spring, with it ratio tube length to overhang selected between O 4 ... O 6. Table 1 Constructions collector devices Constructive p1 Parameter Average time to service life precisely-collector node), h 0 five Flat spring pressure element With a flat spring and a V-shaped contacting part With damper i 0,5 With damper ii: 0.4-0.5 26 320 Table 2 2 3 four five 0.2 0.3 0.4 0.5 0.6 130 290 320 270 150 43 54 58 55 44 Table3 Varying constructive parameter Average time between failures (resource of the brush-collector unit), h Efficiency ... 0.3 0.4 0.5 0.6 0.7 150 287 320 260 190 41 56 58 53 42