RU2535354C2 - Coupling with rectangular springs - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to equipment for transfer of torque from engine to consuming hardware, particularly, to couplings with rectangular springs. Said coupling comprises drive and drive half-couplings, rectangular springs and spring attachments to said half-couplings. Of four staggered rectangular springs two work in tension and two in compression. Said coupling features nonlinear properties.

EFFECT: reduced stress in shafting caused by irregular spinning or whirling vibrations.

10 dwg

Description

The invention relates to equipment for transmitting torque from a source to a consumer of mechanical energy.

Known couplings with non-metallic elastic links, widely used in industrial equipment because of their relative cheapness of manufacture. However, the scope of such couplings is limited by low mechanical parameters of elastic links made of rubber, leather, etc. With large loads, such couplings are large in size [Polyakov B.C., Barabash I.D. “Couplings. Design and calculation. ”- L.: Mechanical Engineering, 1973, Fig. 58, p. 89].

For the prototype, an elastic coupling of variable stiffness with spring rings manufactured by the Leningrad Machine-Tool Plant named after Sverdlova [Polyakov B.C., Barabash I.D. “Couplings. Design and calculation. ”- L.: Mechanical Engineering, 1973, Fig. 55, p. 82]. In the coupling halves, two longitudinal slots are milled for four spring rings installed in a checkerboard pattern. Springs with protrusions in the slots of the coupling halves transmit torque from the source to the consumer of mechanical energy. The slots of the driven coupling half are of the same width, and the slots of the driving coupling half are four-step wide, which ensures the sequential entry into operation of four spring rings with an increase in load and, accordingly, the twisting angle of one coupling half relative to the other. The springs are made of 60 Cg steel. The disadvantages of such a clutch include the uneven load on the spring rings. The first ring to enter operation transmits 40% of the torque.

The objective of the invention is the transmission of torque from the engine to the consumer. The invention can be used as an anti-vibration joint, leading to a decrease in shear stresses from uneven rotation and from torsional vibrations in the shaft line. The problem is solved due to the fact that in the device, consisting of two coupling halves and four springs of rectangular cross-section of linear stiffness, arranged in a checkerboard pattern, the following differences are provided. The proposed coupling with rectangular springs is characterized by the location of the springs in the coupling half, which are mounted on the fingers and fastened with a nut with a spring washer. Of the four rectangular springs, two work in compression and two in tension. Limiters are provided on each coupling half, in which the springs can abut during the operation of the coupling. When transmitting torque, a pair of tensile springs, with an increase in load, fits around the small-diameter limiter of the coupling half, and the other pair of springs at this time compresses, fitting the limiter of the larger diameter of the coupling half. When the torque sign changes, the pair of springs that worked in tension will work in compression, fitting a larger diameter limiter, while the other pair of springs will work in tension at this time, with a smaller diameter in the coupling coupling. Thus, under the influence of limiters when transmitting uneven torque, the stiffness of the springs, therefore, the clutch can vary nonlinearly.

Between the set of essential features of the claimed object and the achieved technical result there is a causal relationship, namely the transmission of torque by means of springs installed in the coupling half, reduction of shear stresses in the shaft line from rotation unevenness and from torsional vibrations due to limiters allowing the coupling to have nonlinear properties when changing the amplitude and sign of the moment.

The invention allows to transmit significant torque and reduce tangential stresses in the shaft line.

The technical essence and principle of operation of the proposed device are illustrated in graphic material, which shows:

Figure 1 is a main sectional view of a coupling;

Figure 2 is a view of the coupling on the left;

Figure 3 mounting rectangular springs in one of the coupling halves, the main view;

Figure 4 mounting rectangular springs in one of the coupling halves, left view;

Figure 5 mounting rectangular springs in one of the coupling halves axonometric projection;

Figure 6 mounting of rectangular springs in one of the coupling halves, top view;

Figure 7 General view of the coupling, the main view;

Figure 8 General view of the coupling, left view;

Figure 9 General view of the coupling, axonometric projection;

Figure 10 General view of the coupling, top view.

The possibility of carrying out the claimed invention is shown by the following examples: installation in a ship shaft line, between the engine and the generator, etc.

The proposed clutch with rectangular springs (figure 1) consists of a driven 1 and leading 2 half couplings, rectangular springs 3 and fastening the springs to the half couplings.

The listed structural elements are made as follows: a driven coupling half with holes for installing pins 4 and with holes for nuts 5, a leading coupling coupling with stops and with holes for installing fingers in it and with holes for nuts, rectangular springs have holes for mounting them on a finger and a cutout, to ensure the installation of other springs, fixing the springs to the coupling halves, consisting of fingers having a protrusion at one end and a thread on the other, nuts with spring washers 6, washers 7, intended for use the joints, which are located between the springs and bushings 8, provided for accurate setting of springs in the coupling parts.

The coupling with rectangular springs is installed in the shaft line between the source and consumer of mechanical energy. During operation, springs located in a half-coupling in a checkerboard pattern, two of which work in compression, two in tension, depending on the magnitude of the transmitted torque, select a gap and begin to abut against the stops located in one of the half-couplings, thereby changing their stiffness and clutch has nonlinear properties.

The above-described clutch with rectangular springs is used as follows: rectangular springs are installed in the coupling half in accordance with figures 3, 4, 5, 6, and depending on the magnitude of the transmitted torque, the clutch is attached to the shaft with an interference fit, key or slot.

Claims (1)

A clutch with rectangular springs, containing the driven and driving half-couplings, rectangular springs and fastening springs to the half-couplings, characterized in that of the four rectangular springs arranged in a checkerboard pattern, two work for compression and two for tensile, in addition, due to limiters, in which the springs abut, the coupling has non-linear properties.

Images