RU2770235C1 - Cassette clutch - Google Patents

Abstract

FIELD: mechanical engineering.SUBSTANCE: invention relates to the field of mechanical engineering. Between the driving and driven parts of the coupling there is an elastic-damping assembly with supports, which is a separate cassette. The cassette consists of two coupling halves and pressure star-shaped blocks with longitudinal-radial grooves made in them between the rays of the stars. A single piece of steel rope is placed in a zigzag manner around the outer end parts of the rays of the stars with the formation of loops and a straight rod section. The loops and ends of the rope are fixed in half-couplings and pressure star-shaped blocks.EFFECT: increased reliability and maintainability of the clutch.1 cl, 3 dwg

Description

The invention relates to elastic connections, namely to couplings.

Couplings with elastic elements made of steel rope, as technical solutions, are known and are presented in the patent for the invention of the Russian Federation No. 2658208, as well as in the patent for utility model No. 137585.

Closest to the proposed invention in terms of technical essence and the achieved result is a clutch according to the utility model patent No. 137585, adopted as a prototype, which contains a driving and driven parts, an elastic-damping assembly placed between them, made of bundles of steel rope with supports. The means of fastening the ends of the steel rope bundle to the coupling supports is welding (soldering, gluing).

Significant disadvantages of this clutch are the lack of reliability and durability of fastening of bundles of steel rope and the inability to transmit large torques. The rationale for these shortcomings is associated with the method of attaching the ends of the steel rope bundle to the supports by welding, soldering or gluing. The operation of the coupling under conditions of deformations of torsion, bending, tension and compression with the corresponding torsional-flexural-axial vibrations, as well as under shock loads, leads to a violation of the fastening of the ends of the rope bundles to the supports.

The technical result of the invention is to increase the reliability and maintainability of the coupling for both small and large torques, taking into account dynamic loads and possible operational overloads.

The specified technical result is achieved by the fact that:

1. The coupling is made as a cassette, that is, it is composite and has maintainability;

2. The steel rope resilient damping element is made of one single piece;

3. The driving and driven elements of the clutch are made composite and contain, respectively, half-couplings, pressure star-shaped blocks with the formation of longitudinal-radial grooves between the rays of the stars;

4. A single piece of steel rope elastic-damping element is placed in the longitudinal grooves in a zigzag manner around the outer end parts of the rays of the stars of the leading and driven blocks with the formation of loops and a rectilinear rod bundle;

5. Both ends of the steel rope - elastic damping element are installed in specially provided longitudinal holes of pressure star-shaped blocks;

6. The length of the working part of the bundles of elastic rope elements is selected by calculation according to the given value of the torque value, the shaft speed and other initial data;

7. Non-working parts of the steel rope elastic element are sections within the lengths of the pressure star-shaped blocks, taking into account the loops;

8. Fixing and fastening of the loops and ends of the steel rope is carried out by fasteners together with half-couplings and pressure star-shaped blocks.

In the proposed cassette coupling, that is, a composite structure, the elastic-damping element is made of one solid piece of steel rope in the form of a rectilinear rod bundle with working and non-working parts. The fastening of the rope in the driving and driven elements of the coupling is carried out not by welding, but by means of fasteners, which ensures an increase in the reliability of the coupling, as well as its maintainability for both small and large torques, taking into account dynamic loads and possible operational overloads.

The essence of the invention is illustrated by drawings: Fig. 1 - general view of the coupling with flat coupling halves; fig. 2 - general view of the coupling without flat coupling halves; fig. 3 - general view of the coupling with half-coupling shanks.

The coupling contains a resiliently damping steel rope element 1 (Fig. 1-3), half-couplings 2, 3 (Fig. 1.3), pressure star-shaped blocks 4, 5, star rays 6, 7 (Fig. 1-3), fasteners 8 , 9, 10 (Fig. 1-3), cassettes 11, 12 in the form of longitudinal-radial grooves (Fig. 1-3), fixed ends 13, 14 of the rope (Fig. 2), half-coupling shanks 15, 16 (Fig. 3), hole 17 of the shank with a keyway (Fig. 3), threaded hole 18 (Fig. 3).

A single piece of steel rope of the elastic damping element 1 is placed in longitudinal cassettes 11, 12 in a zigzag fashion around the outer end parts of the beams 6, 7 of the stars of the leading 4 and driven 5 blocks with the formation of loops and a rectilinear rod bundle of element 1 (Fig. 1-3).

The driving and driven elements of the clutch are made composite and contain, respectively, half-couplings 3, 2, pressure star-shaped blocks 4, 5 with the formation between the rays 7, 5 of the stars of the longitudinal-radial grooves 11, 12 (Fig. 1-3).

Both ends 13, 14 (Fig. 2) of the steel rope of the elastic damping element 1 are installed in specially provided longitudinal holes (not shown in Fig. 2) of the pressure star-shaped block 4 (Fig. 2).

The non-working parts of the steel rope elastic element 1 are sections within the lengths of the pressure star-shaped blocks 4, 5 (Fig. 1-3), taking into account the loops (Fig. 2).

Fixation and fastening of the loops and ends of the steel rope is carried out by fasteners 9, 10 (Fig. 1, 3), together with half-couplings 2, 3 (Fig. 1, 3) and pressure star-shaped blocks 4, 5 (Fig. 1-3).

The clutch shown in Fig. 1 with flat half couplings 2, 3 can also be used as an element of a set for a prefabricated coupling if it is necessary to ensure the transmission of high torques.

The proposed technical solution of the clutch when used as a clutch of the main marine diesel power plant (GSDEU) works as follows.

When torque is applied from the engine through the driving elements 3, 4 to the resiliently damping steel rope element 1 (Fig. 1-3), there is a relative angular movement of the leading 3, 4 and driven 2, 5 coupling elements. The relative angular displacements of the elements 3, 4 and 2, 5 arising in this case are eliminated due to the angular deformations of the elastically damping rope bundles 1.

Due to vibrations and deformations of the shafts, as well as the foundation under load, achieving strict alignment of the driving and driven shafts (not shown in Fig. 1-3) is associated with considerable difficulty and is not always justified. Therefore, the proposed clutch (Fig. 1-3), fixed on the one hand to the drive shaft of the engine, and on the other hand to the ship's shafting, provides not only a smooth transmission of torque, but also the operation of the GSDEU in conditions of fracture and displacement of the axles. This is achieved due to the spatial elastic deformation of the rope elastic damping elements 1.

The elimination of all types of alternating movements occurs both due to elastic deformation (torsion, bending, shear, etc.), and due to internal friction of the steel rope material.

Thus, there is a transmission of torque of the GSDS not only with torsional, but also with axial, bending and coupled (torsional-flexural-axial) vibrations, taking into account large dynamic loads, possible operational overloads. At the same time, the coupling also provides sound insulation at the same time, since the sections of the steel rope bundle have a large damping.

Some elements of the clutch can be completely or partially made of composite materials.

The proposed technical solution of the coupling ensures the achievement of high efficiency of torque transmission in conditions of fracture and displacement of the axes of the driving and driven flanges. In this case, the coupling is simultaneously a damper for torsional, axial, bending and coupled vibrations.

The originality of the cassette clutch lies, among other things, in the possibility of replacing the elastic element, that is, the clutch is repairable, and the use of one piece of rope as the elastic element of the clutch with the described method of fastening ensures the reliability of the elastic-damping element, and, therefore, the achievement of the goal of the technical solution of the clutch.

Claims (1)

A cassette coupling comprising a driving and a driven part, an elastic-damping assembly with supports placed between them, means for fastening the supports of the elastic-damping assembly to the driving and driven parts of the coupling, an elastic-damping element in the form of a straight rod bundle of a steel rope with working and non-working parts, characterized in that the coupling is made the composite, elastically damping assembly of which is made in the form of a separate cassette, consisting of two half-couplings and pressure star-shaped blocks with longitudinal-radial grooves made in them between the rays of the stars for placement in the latter in a zigzag manner around the outer end parts of the rays of the stars of the blocks with the formation of loops and a straight rod section of the solid a piece of steel rope, the fixation and fastening of the loops and ends of which are made in half-couplings and pressure star-shaped blocks using fasteners.

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