SU129369A1 - Test Vibration Stand - Google Patents

Description

Known vibration test benches are equipped with a directional vibrator with a real, containing moving (relatively unsupported) unbalanced loads. A change in the disturbing force of such vibrators is achieved by varying the nonstand weight of the solid cargo relative to the axis of rotation.

A distinctive feature of the stand described is as follows.

On the driven shaft of the vibrator on the block of movable weights a hydraulic power cylinder of rotary real is built. This cluster is nrednaznanen for a change in the magnitude of the disturbing force during the operation of the vibrator, the relative position of the goods of which is fixed by means of a locking mechanism located on its driving shaft. Such a stand device boosts its performance and reliability, and eases the condition of its operation.

FIG. 1 schematically depicts the hydraulic ciKioBoii cylinder in cross section; in fig. 2 is the same side view with a partial cut; in fig. 3 - horizontal section of the vibrator; in fig. 4 is a CC section of FIG. 3

The main part of the stand is the oscillating system, which comes from the mass and the springs. The mass includes the test object, the stand platform and the vibrator.

The vibrator is designed to communicate forced vibrations to the platform of the shaker, on which objects are placed, to be tested.

The stand is equipped with a directional vibrator, the magnitude of the disturbing force of which varies with the direction of the force. The change in the magnitude of the disturbing force is made by changing the position of the center of gravity of the unbalanced weights relative to the axis of rotation.

: iie; ifSbfl4i BWWibb vibrator loads are in the form of col1, iBibixscCKTOpOB with a central condition of 180 °.

jHiBif ka) YL | 1gvalu B1 There are four such loads placed on the bridge: two of them are with | ((; an institution of the shaft, two can rotate relative to the shaft | 10 fixed loads. The operating angle of the loads is ET80).

H-aHOWjrrBTHW is a disturbing mustache); whether (it develops a full combination of the i1 with the vibrator i1) avionBeaterpie | -ruz () b, and the force is zero at the opposite position.

For the implementation of the rotation of the cargo on the shafts of the vibrator, the power cylinder of angular displacements was used. The rotation of the weights is controlled by the supply of oil entering the cylinder under pressure. Arranged vibrator as follows.

A blade 2 is fixedly mounted on the shaft / (fig. I). The cylindrical chamber is divided by a blade 2 and a partition 3 into cavities L and B. The oil outlet but channel 4 into the I column L and the parts connected with it are rotated relative to the shaft and blades. The oil from cavity B will be forced out through the corresponding channels to the drain.

When the oil is fed through channel 5, the turn will occur in the opposite direction. The numbers 5 and 7 respectively denote the seal and the sealing rings.

The power cylinder is located on the driven shaft of the vibrator. In a similar chamber on the drive shaft of the vibrator, a latch mechanism is dismounted: the flange of the shaft and the piston with butt-shaped triangular slits, the scene of which is produced by iodine action of cylindrical rings arranged evenly around the circumference. Porn extraction from the shaft flange is performed by supplying oil, which is not received into the chamber under pressure before the transfer of goods begins.

The shafts of the vibrator are interconnected by gear wheels. When pressed from the flange of the shaft of the cylinder C when the oil is pumped into the cylinder of rotation of cargo, the moving cargo will begin to turn relatively stationary simultaneously on both shafts. When the channel for supplying oil to the clamp latch is connected to the drain line, the cylindrical springs do not displace the piston prior to engagement with the shaft flange, fixing the relative position of the weights.

In case 8 (Fig. 3), led driveshafts are installed on the springs, and driven shafts 9 and 10 are installed.

Cargoes //, 2 and 13 are planted on the drive shaft, loads 14, 15 and 16 are driven on the driven shaft. Cargoes // and 14, made integral with gear wheels, are mounted on the shafts fixedly.

Loads 12 and 13 with a gear wheel II are bolted together into one block and make up the middle movable part of unbalanced loads. In the cylindrical chamber formed by the walls of the weights and the inner surface of the crown of the gear wheel, on the driven shaft 10, the blade 8 and the partition 19 (phg. 4) rigidly fitted to the gear wheel / 7 are rigidly seated.

The oil is brought in and drained to the cylinders and other on the basis of the axes (radiators and the shaft channels).

On the drive shaft 9, the middle movable part also forms a cylinder, inside which is located a stopper mechanism, consisting of a shaft flange with face slots, a piston 20 with counter slots and cylindrical springs located between the walls of the cargo and a circular circumference. The springs are entered in the entry zone from the shaft 11 of the shaft.

Porgyep with a load of 12 is connected by longitudinal slots, which are ok

can shift under the pressure of oil, and also rotate with the block when turning weights.

The oil is supplied to the piston through channels which are made in the shaft.

The drive of the shaft into the shafts is carried out through appropriate fittings and drilling in the caps covering the bearings and the ends of the shafts.

The seal between the shaft and the corresponding cap is carried out with bronze rings.

To remotely determine the mutual position of the loads on the shaft of the vibrator on one of the caps B1 of the brator, a thermometer is fixed. Measurement of the angle of rotation of the goods is based on converting the rotational motion into a translational motion, for which a two-way thread of a rectangular profile is made on the part of the load sleeve 13.

In the groove of the shaft, there is a spaced leash, which is connected to a roller located in the shaft channel. The roller has only translational motion, which is not affected by the potentiometer through the tappet. The sensor is electrically connected to the corresponding pointer. The body of the vibrator is made detachable, which facilitates its installation. The shaker table is controlled from the control panel, on which controls and control devices are mounted, both with the electric part of the step and the hydraulic part.

The electrical equipment of the step includes a DC power supply, an electric motor for the drive, as well as coitrol devices and switching equipment. The frequency change is made by varying the voltage applied to the drive motor, which is carried out using rheostats.

The hydraulic system of the vibrostand is also designed to ensure the change in the amity of the operating stand, as well as to lubricate and cool the vibrators and gears of the vibrator.

The hydraulic system of the test bench consists mainly of the oil tank of the pump with an electric actuator, a filter and pressure and pressure relief valves, control points and pipelines connecting these units.

Subject invention

An exemplary vibration stand with a vibrator and a right-handed action contains movable (relatively motionless) non-equilibrated loads mounted on rotary shafts, by changing the position of the center of gravity of which relative to the axis of rotation, a change is made in the magnitude of the disturbing vibrator force, which is different in that performance and reliability, as well as ease of operation, on the slave of the vibrator shaft in the moving loads integrated hydraulic power center pivoting action of the cylinders, for varying the prediazpachenny perturbing uspli during operation of the vibrator relative iolozheppe cargo which is fixed with tsomoi1, yu stoiorio1o mechanism located ua its driving shaft.

No. 129369