SU828280A1 - Device for measuring brush pressure onto electric machine collector - Google Patents

Description

not in the form of an elastic element with windings, and two metal balls interacting with said sensors and with rods, which are located in the movable parts of the bar, the rods are equipped with protective gear, positive springs and adjusting screws, and the movable parts are w help shives supplied with: adjusting springs.

The use of a measuring brush in the device of this design makes it possible to simultaneously measure the pressing of both elements of the brush on the collector, which improves productivity and measurement accuracy. And the use of protective springs in the design of the brush, which transmit forces from moving parts to the force-measuring elements through steel balls, makes it possible to protect the force-measuring elements when the pressure fingers hit the brush elements, which increases the reliability of the measuring device.

FIG. 1 shows the proposed device, a general view; in fig. 2 - sparse brush.

The device consists of a special electrical measuring device 1, a pressure sensor 2 (load elements), a vibrator with elements for fixing the brush holder 3 and a split brush 4. The brush 4 is made of a common stationary part 5 with restrictive projections 6, in which two elastic sensors 2 are located windings, and two movable parts 7. The movable parts 7 of the elements of the brush 4 are connected to the force-measuring elements 8 through steel balls 8, which are located in the fixed part 5, rods 9, protective springs 10 and adjustable Alignment screws 11. Elements 9, 10, 11 are located in the body of the movable parts 7. Parts 7 are put on guide pins 12 fixed in part 5. On the studs 12 along which parts 7 are moving, adjusting springs are located on the top and bottom of these parts 13. The brush 4 is inserted from below into the window of the brush holder 14 attached to the vibrator 3, up to the limiting projections 6 of the part 5.

The device works as follows.

In the absence of pressing the fingers of the brush holder 14 on the movable parts 7 of the elements of the brush 4, the initial weight of these elements is compensated for by means of the spring 13. Therefore, the pressure on the force-measuring elements 2 is absent and the signal at the input of the measuring device 1 is zero.

When the pressing fingers are released, the brush holder 14 on the part 7 of the brush 4 creates forces to press these parts, which are transmitted to the elements 2 via steel balls 8, rods 9, springs 10

l screws 11. Mechanical stresses occur in the load cells that change the electrophysical properties of these elements, which are fixed by the electrical measuring device 1. At the same time, the springs 10 are compressed with screws And to the magnitude of the force, the springs of which begin to deform. Forces of pressing created by push

under normal conditions of operation, the fingers work on - base parts 5 and further through elements 8-I to elements 2, lie below the compressive forces of the springs 10.

When the pressing fingers of the brush holder 14 strike, parts 7 of the elements of the brush 4, when they are sharply lowered, the forces acting by 10 exceed the value of the force of their preliminary compression. The springs 10 are thus deformed, and the parts 7 are lowered onto the part 5 of the brush 4.

Thus, the load cells are protected when the pressure fingers hit the brush elements, which increases the reliability of the device. The use of a measuring brush in the device of this design makes it possible to simultaneously measure the pressing of both elements of the brush on the collector, which improves the performance by more than 2 times and the measurement accuracy.

Claims (2)

1. Japanese Patent No. 51-37028, class H 01R 39/43, 1977. 2. “Electric locomotive VL-801, Operation manual. Edited by B. R. Bondarenko, M., “Transport, 1977.