SU99126A1 - Training instrument for determining mechanical heat equivalent - Google Patents

Description

The invention relates to training devices for laboratory work on the definition of fur equivalent of heat.

Devices are known for demonstrating the determination of, for example, a mechanical eq, a view of a heat, based on friction of cones, cylindrical wafers (so-called and so-called).

In the described instrument, a calorimetric method for determining the mechanical equivalent of tentam is applied, that the measurement accuracy and allows students themselves to carry out practical work.

FIG. 1 shows a schematic drawing of a general view of the device in a longitudinal section; in fig. 2 () bp; iy type of calorimetric glass; in fig. 3 - Obnip view of qi. (Indrichesky tube; in Fig. 4

top view of the house

A device for determining the mechanical dimension of the heat equivalent: in the form of a calorimetric cup 1, V, which has a cylindrical tube 2, ira has its g (surface elastic tongs 3, disposable (in chessboard and chessboard. B The upper part of the cylindrical tube has pads 4 bent inward by the needle. The calorimetric cup almost inserted into the instrument’s gusset 5 made of tenloisol of the central material.

On top of the cylindrical tube 2 is closed with its nests placed on the latch 4 with a lid 6, to the center of which there is a sling seed 7 with a pin. The upper part of the stand is: -, the device is closed with a casing 6 with a spindle 9. The handwheel 10, tightly mounted on the roller //, and the cutout in the lower part are put on the shaft 7 of the hatch for connection with the rod 7. The handwheel is equipped with a handle 12, and to va, 1ku / U, an elastic lever 13 is attached, carrying a handle M at the end, an indicator 15 for counting the divisions of the nogka.te / 5 handwheel and a hook / 7 d.SH connection with a dip gauge.

In order to test the calorimeter cup / instrument, for example, kerosene, measure the temperature and close the lid 6 and the casing 8, put on the flywheel} 0 and rotate it at a certain speed with the help of the handle 14 of the elastic lever 13. On the scale of 16 mark position of the elastic lever 3. Then quickly rotate the handwheel 10 by means of the handle 12. With the rotation of the handwheel gets a rotational

ci-hydride tube 2 movement, tab control. which rub against the walls of the Glass.

After a known number of revolutions, the handwheel is removed, the lid is opened, and the temperature of the liquid inside the glass is measured again.

The force applied to the knob 14 during rotation of the handwheel is measured with a dynamometer, pushing the elastic lever 13 by the hook, until the pointer / 5 is no longer on the previously marked division on a scale of 16.

Prevention and Consideration

A training device for determining mechanical heat equivalent is distinguished by the fact that it consists of a calorimetric cup mounted on a stand, placed inside the last cylindrical tube, which has elastic tongues on its surface, and connected to a handwheel tube equipped with a lever and an elastic lever carrying a handle to bring the handwheel in agony;

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