SU40633A1 - Tachometer - Google Patents

Description

The proposed stationary driving tachometer with the use of a fan differs from the existing manual revolutions and tachometers in that the driving tachometer is directly connected to a transmission drive with a machine, engine, transmission, machine tool, etc., where the instrument indicates the rpm on the scale . Thus, during operation, the rotational speed required of a particular shaft is monitored, with appropriate equipment performance. The use of this device in the industry makes it possible to timely repair the detected defects related to the overall performance.

In FIG. Figure 1 shows the front tachometer with a partial cut; FIG. 2 is a side view of it.

In the closed casing 7, with a notch 15 for the scale 14, fastened with bolts 17, a box of 4 fans is placed. The wings 5 of the fan with the plates 6 are bolted 16 to a square 7, which is tightly mounted on the drive roller S, rotating in the sleeve 2 with a solid face 2 attached inside to the wall of the casing / bolts 18; The fan box 4 is attached to the same washer with bolts 19. On the roller 8 there is a retaining ring 3 on the outside of the casing 7. On one side of the box 4 there is an air inlet in the form of a cutout 26 around the axis of the fan. Box 4 is provided at the outlet with a blade I capable of rotating with axis 72 associated with spring 10 and index arrow .75; the spring 10, which serves to install the arrow 13 on the O, with its other end fastened to the protrusion 11. During rotation associated with a corresponding gear with a machine, engine, machine, etc., a roller 8 with fan wings 5 is formed in the outlet of the box 7 of the air pressure towards the blade I, which consequently deviates upward, which drives the pointer arrow 75. Depending on the number of revolutions of the fan wings and, consequently, the air pressure, the arrow 75 indicates on a scale of 14 respectively vuyuschee Chimo rpm. For oiling the roller, an oiler 27 is installed with a tube 20. The division on the tongue is initially noted in parallel with the indication of a manual precision rev counter at different revolutions of the roller 8 per minute.

For continuous operation and direct connection of the device with the desired shaft onto the roller 8, a gear of the appropriate diameter or a chain drive is fitted on the roller 8.

The subject matter of the invention.

. A tachometer using a fan, characterized in that the fan box having an air inlet in the form of a cutout 26 around its

the axle and the enclosed unclosed casing /, is provided in the outlet aperture which is rotatable on the axis 72 and under the action of the spring W by the blade I connected to the index arrow 75 ..

fig

fig 2