SU815334A1 - Elastic coupling - Google Patents

Description

(54) ELASTIC CLUTCH

I

The invention relates to mechanical engineering, and in particular to devices for transmitting rotation.

A known elastic coupling comprising two coupling halves and elastic elements 1.

The disadvantage of it is low load capacity.

The closest in technical essence to the present invention is an elastic coupling comprising two forming an annular cavity with protrusions and elastic elements mounted on the fingers 2 mounted between them.

Its disadvantage is low damping capacity.

The purpose of the invention is to increase the damping ability.

The goal is achieved by the fact that the annular cavity between the coupling halves is made airtight and filled with oil, and the elastic elements are located in it and are made in the form of a set of cup springs pairwise in contact with each other along the outer diameter and forming chambers with the finger. The fingers are hollow and have radial holes that, together with the finger, connect their cavity with the cup spherical chambers and are equipped with a calibrated orifice mounted in the cavity of the finger.

FIG. 1 shows the elastic coupling in the section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 is an axial section through one of the cylindrical fingers on an enlarged scale.

Leading spring 1 is connected by means of the slot 2 with the leading coupling half 3 of the elastic coupling.

On the hub 4, projections 5 are made, between which projections 6 of the rim 7, the driven half-coupling 8 are located.

In the protrusions 5 and 6, cylindrical recesses are made, along which these protrusions are in contact with the cylindrical and joint crackers 9, whose axes are parallel to the axis of the device.

The rim 7 is closed by a flap 10 and together. with hub 4 forms the oil cavity of the coupling. Oil is poured into the oil cavity of the coupling through the filling hole 11, which is muffled by the threaded plug 12.

Between the cover 10, the hub 4 of the driven coupling half 8, bushings 13 are installed, secured against the right-hand rotation with screws 14. The bushings 13 are made of an antifriction material and act as bearings. Seals 15 are also provided to seal the internal cavity between the rim and the hub.

In the cracks 9 there are cylindrical holes 16, into which cylindrical hollow fingers 17 enter, on which elastic elements in the form of conical disks of belleville springs 18 are mounted.

The contacting inner surfaces of the disc springs form chambers 19 — part of the oil cavity of the coupling filled with oil, which are connected by heat 20 and holes 21 to the internal cavity 22 of cylindrical hollow fingers 17 and then through replaceable calibrated nozzles 23 with space 24. Space 24 and chamber 19 - two parts of the oil cavity of the coupling.

The device works as follows.

When transmitting torque from the leading coupling half 3 to the driven coupling half 8, radial forces from the projections 5 through the crackers 9 and the disc springs 17 are transmitted to the projections 6. The shock application of the torque does not cause significant stresses in the shaft parts and in the elastic coupling , because due to the large compliance and deformation of the springs, which allow a significant displacement of the drive shaft relative to the follower (up to 6-10), the sharp effect of the moment is softened, stretched in time. This improves the reliability of the shafting. Reducing the maximum possible voltage is usually only during periods of starting and stopping the machine makes it possible to make the shafts thinner and, consequently, lighter.

On the other hand, when torsional oscillations occur and when these oscillations approach critical modes, a damping effect begins to appear in the oil cavity of the coupling, consisting in pumping the oil from their chambers 19 of the cup springs 18 through the nozzles 23 into the space 24 and back. When such oil is pumped, the energy of vibration oscillations in the oil cavity is dissipated and the level of stresses in the shafting associated with the oscillations is also significantly reduced.

The economic efficiency of the device is that such an implementation of the coupling design allows to reduce the level of stresses and deformations in the parts of the shafting during periods of overloads with a shock torque (periods of start and stop of the maschine) and at the onset of resonant modes. Depending on the program of operation of the machine, it is possible, by changing the passage section of the nozzles 23, to select the optimum mode of operation, with the least overloading of the shaft line. Such an opportunity allows either to reduce the weight of the shafting or to increase the reliability and service life of the machine, which is very important especially in aviation research facilities, usually operating in wide ranges of revolutions and loads.

Claims (2)

1. A coupling coupling comprising two annular coupling-forming half-couplings with protrusions and elastic elements mounted on the fingers arranged between them, characterized in that, in order to increase the damping capacity, the annular cavity between the coupling half is sealed and filled with oil, and the elastic elements are located in it and made in the form of a set of disc springs, pairwise in contact with each other along the outer diameter and forming together with the fingers m of the camera. 2. A coupler according to claim 1, characterized in that each finger is hollow, with radial holes connecting the finger cavity to the chamber of the cup springs and provided with a calibrated jet installed in the cavity. Sources of information taken into account in the examination 1. USSR author's certificate number 166558, cl. F 16 D 8/12, 1964. 2.Orlov P.I. Basics of construction. M., “Mechanical Engineering, 1977, p. 572, fig. 414 (prototype). S765 . 7 sixteen ten