SU756249A1 - Selective null-indicator - Google Patents

Description

The invention relates to general engineering, in particular to devices for testing gears and gears for uneven rotation at $ workloads and speeds.

A stand for testing gears for uneven rotation under dynamic conditions is known, comprising a drive, driving and driven spins for mounting the test wheels, a cover mounted on the driven spindle and filled with a heavy non-conductive fluid, a torsiographic flywheel-float connected to the driven spindle and installed in Ko ^{* 1} ^ zhuhe built into the side stenku'kozhuha temperature compensators with a plunger, spring-loaded in the direction of the axis • Pile graphic flywheel-float _ discharging device orsionnym meter braking torque and amplifying and recording equipment

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The disadvantage of the known stand is that it does not provide the necessary accuracy and stability of measurements of the angular displacements of the test wheels.

The aim of the invention is to improve the accuracy and stability of the measurement of the angular movements of the test wheels.

This goal is achieved by the fact that the stand is equipped with an annular liner mounted for movement in the axial direction between the outer surface of the torsographic flywheel-float and the inner surface of the casing and connected with the plungers, and in the torsyographic flywheel-float an annular cavity is placed .

'In addition, the facing surfaces of the liner and the casing are cylindrical, and the liner and the torsiographic flywheel-float are conical.

FIG. 1 shows a schematic diagram of the stand; in fig. 2 shows section A-A in FIG. one.

The stand contains a drive 1, a leading 25 and a driven spindle 2 and 3 for installing the tested gears, a casing 4 fixed on the driven spindle 3 and filled with a heavy non-conductive liquid 5, a torsiographic 30 flywheel-float 6 mounted with

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zero buoyancy inside the casing 4, contactless transducer 7 angular displacements and an electromagnetic lock 8 mounted on the casing 4, temperature compensators 9 with spring-loaded plunger measures 10 in the direction of the Fairy, embedded in one of the casing walls 4, loading device 11 with a torsion gauge 12 braking torque and power-recording equipment (not shown).

Torsiographic flywheel-float 6 is made around the periphery with an annular cavity 13 communicating with the cavity 14 of the casing 4, and blades 15 placed in the annular cavity 13 and fixed on the inner cylindrical surface 16. As the annular cavity 13 communicates with the cavity 14 of the casing 4 , it is also filled with a heavy fluid 5. in operation, the stand 20, this liquid serves as a flywheel therefore ^-., torsiografichesky flywheel float 6 combined is obtained, consisting of a float 17 and fluid flywheel 18, mutually imosvyaz 25 IU waiting for which is carried out with the help of blades 15.

The outer surface 19 of the torsiographic flywheel-float 6 is made 'conical, and in the gap between the torso -__ graphic flywheel-float 6 and the casing 4 is placed an annular liner

20 with the inner conical and outer cylindrical 21 and 22 surfaces associated with the plungers 10 of thermal compensators 9. Thus, the damper is ^about one single conical surface 19 of the torsiographic flywheel-float:

6, the inner conical surface21 of the annular insert 20 of the casing 4 and

heavy liquid 5 filling a 40 eor between them. :

The stand works as follows.

The test gears 23 and 24 are mounted respectively on the spindles 2 nd 3. The drive 1 is turned on. After ^ 5 acceleration of the torsiographic flywheel 6, the electromagnetic lock 8 is turned off, while the amplifying recording equipment is switched on and the readings are taken. Rotation of the torso-50 graphic flywheel the float 6 is supported by friction about the surrounding; heavy liquid.

When the temperature fluctuates during operation of the stand, the viscosity and, consequently, the volume of the heavy fluid 5 filling the cavity 14 of the housing 4 changes, which leads to a change in the position of the plungers 10 by the thermal compensator 9 and the associated annular liner 20. As a result, the gap between working surfaces of the damper, which leads to a change in the damping torque.

This embodiment of the stand design provides automatic balancing of the torsiographic flywheel float and automatic correction of the damping moment when the temperature regimes change during the stand operation, which allows to increase the accuracy and stability of measurements of the angular displacements of the test gears.

Claims (2)

Claim 1. Stand for testing gears on the uneven rotation in dynamic conditions, containing the drive, drive and driven spindles for. installation of the tested wheels, a casing fixed on the driven spindle and filled with a heavy non-conducting fluid, a torsiographic flywheel-float connected to the driven spindle and mounted in the casing, thermal compensators with plungers, spring-loaded in the direction of the torsographic-displacement frame, and a drawbar –––––––––– template –––––––––––––––– with a torsion brake torque meter and amplifier-recording equipment, characterized in that, in order to improve the accuracy and stability of measurements lauryl displacement wheel test, it is provided with an annular insert mounted movably in the axial direction between the outer surface of the flywheel torsiograficheskogo-float and the inner surface of the casing and connected. * with a plunger, and in the torsiographic flywheel-float there is a ring cavity, on the inner surface of which there are blades. 2. Stand on π. 1, which differs from I in that the surfaces of the liner and the casing facing each other are cylindrical, and the liner and the torsiographic flywheel-float are conical.