SU1437713A1 - Inertial loader for testing shafts and transmissions for strength - Google Patents

Abstract

The invention relates to a testing technique, to devices for reproducing a dynamic torque at testing gears of rotational motion. The purpose of the invention is to enhance the functionality by providing adjustment of the amplitude and frequency of the torque during the test. The shaft 1 is connected to the shaft of the test device. Weights 2 are connected to shaft 1 and sleeve 5 by levers 3 and 4. As shaft 1 rotates and sleeve 5 moves, drive 8 changes in time the moment of inertia of loads, which leads to a change in torque on shaft 1. Adjusting the amplitude and frequency of torque change the moment is produced by a drive 8. 1 sludge. "(L 4 SO H 00

Description

WITH-

The invention relates to a testing technique, to tests of a rotational movement for strength.

The purpose of the invention is to enhance the functionality by providing adjustment of the amplitude and frequency of the torque during the loading process.

The drawing shows an inertia loading circuit for testing fatigue shafts,

The loader includes a power shaft 1 kinematically connected with the shaft of the test drive, weights 2 mounted on levers 3 and 4. The levers 4 are hingedly connected to weights 2 and to the sleeve 5 mounted on the shaft with the possibility of movement along its axis. The levers 3 are pivotally connected to the stops 6, which are fixed on the shaft 1 symmetrically about its axis. The yoke 7 is connected tarnirno with the drive 8 and the sleeve 5.

The loader works as follows.

Shaft I load the keen; mathematically connected with the shaft of the test object. When the shaft rotates, the weights 2 rotate with it. When the sleeve 5 is moved by the drive 8 through the rocker, the moment of inertia of the weights relative to the axis of rotation and the torque on the shaft change. Amplitude The frequency and nature of the change in torque is determined by the relevant parameters of the displacement of the sleeve 5 by the drive 8. In this case, the dynamic component of the torque is L

M on the shaft is determined by the formula

hl dl

0

50

five

0

five

0

where I is the moment of inertia of the loads relative to the axis of rotation; (jJ - angular velocity of rotation

shaft;

t - time

The loader can be used in test benches for loading objects with dynamic, torque, with the ability to adjust the amplitude, frequency, and nature of the torque change during testing.

Claims (1)

Invention Formula Inertia Loader for testing shafts and gears for strength, containing shaft. intended to connect it to the test shaft, hinge bearings mounted on the shaft symmetrically about its axis, levers, each connected at one end to a corresponding hinge support, centrifugal weights fixed each other end of the corresponding lever symmetrically relative to the axis of the shaft, and device for changing the position of the weights, which is due to the fact that, in order to expand the functionality by ensuring the control of the amplitude and frequency of the torque moment in the process is loaded and, the device for changing the position of the loads is made in the form of a sleeve mounted on the shaft with the possibility of sliding along its axis, additional in the number of loads of levers, each connected pivotally at one end with the sleeve, and the other moving the sleeve. along the shaft axis.