SU25307A1 - Tachometer - Google Patents

Description

The invention relates to tachometers with j application of a spring-loaded lion placed in the air chamber, the axis of which is articulated with the speed indicator.

In the proposed tachometer, air is forced into said air chamber by assisting the impeller located in the air intake chamber. To check the number of revolutions of the shafts rotating in opposite directions with you, the fork of the bracket holding two interlocking gears fastened together on the tachometer housing, the axis of one of which is put on the tachometer roller, and the other carries the tip attached to the shaft which is determined.

In the drawing game. 1 is a front view of a tachometer; FIG. 2 is a vertical longitudinal section of it; FIG. 3 is a vertical section along the line AB in FIG. 2; FIG. 4 is the same, along the line CD in FIG. 2; FIG. , 5 side view with partial incision of the staple with serrations; FIG. 6 is a front view of it.

A tachometer consists of three main parts: a chamber 3 for suction of air, an air chamber 7 and a box 11 for a scale. A roller 1 is inserted into the neck of the casing of the chamber 3, carrying the impeller 6 and adjusted by nuts 5 and 2 (Fig. 2). In the chamber 7, an impeller is placed, the blades 9 of which sit naosi 10; the latter is equipped with a spring 16 (Fig. 4), the ends of which are fixed to the blade 9 and to the housing of the chamber 7. A gear sector 15 coupled to a gear 14, which is located on a common axis with an arrowhead, is connected to the axis. Glass 12, an arrow and a graduated scale 13 are placed in the box 11 (Fig. 1 and 2).

In the MOMeHt stop of the tachometer roller, the impeller 6 rotates into the center of the alternating shaft, and in the chamber IJ air is sucked through the hole 17 and injected through the nozzle 18 through the tube 21 connected to the air nozzle 19; chambers 7. In the latter, the air flow will exert pressure on the impeller with blades 9, which comes into motion together with the toothed sector 15, associated with gear 14. As the gear 14, which sits on the same axis with the arrow pointer, rotates show the number of revolutions on the scale of 13 ,. depending on the number of revolutions of the shaft and, consequently, on the force of the flow, the air supplied by the blades 6. A hole 20 serves to release the air from the chamber 7; the spring 16 serves to bring the arrow back to its original position (Fig. 4).

To check the number of revolutions of shafts with rotation in opposite directions.