Low-stiffness large-torsion metal film type coupling

Abstract

The invention relates to a low-stiffness large-torsion metal film type coupling, and the coupling is mainly used for improving the coupling compensation axis offset capability. The technical proposals adopted by the invention is as follow: the coupling is provided with at least two metal film sets, two inner flanges and two external clamping rings, wherein the inner edge of one metal film set is fixedly connected with one of the inner flanges and the outer edge of one metal film set is fixedly provided with one external clamping ring; the inner edge of the other metal film set is fixedly connected with the other inner flange and the outer edge of the other metal film set is fixedly connected with the other external clamping ring; and the two external clamping rings are fixedly connected into a whole so as to form one single-row low-stiffness large-torsion metal film type coupling, and the coupling is suitable for transmission of different types of large-torsion shaftings.

Description

Technical field: [0001] The invention relates to an elastic coupling with coupling halves connected by one or more intermediate pieces, in particular to an elastic coupling comprising elastic metal sheets. Background technique: [0002] At present, elastic couplings using metal elastic elements mainly include metal diaphragm couplings and metal diaphragm couplings, of which: [0003] The elastic element of the metal diaphragm coupling is a number of ring-shaped metal diaphragms (such as circular, polygonal, spoke-shaped, etc.), and there is a set of bolt holes on the circumference of the diaphragm, and the ring-shaped metal diaphragms are respectively connected by bolts. On the main and driven flanges, the offset of the axis can be compensated by means of the flexible deformation of the diaphragm between two adjacent bolts, and an intermediate shaft is also used. There is a set of ring-shaped metal diaphragms at both ends to form two diaphragms. Couplings are respectively c...

AI Technical Summary

Problems solved by technology

[0003] The elastic element of the metal diaphragm coupling is a number of ring-shaped metal diaphragms (such as circular, polygonal, spoke-shaped, etc.), and there is a set of bolt holes on the circumference of the diaphragm, and the ring-shaped metal diaphragms are respectively connected by bolts. On the main and driven flanges, the offset of the axis can be compensated by means of the flexible deformation of the diaphragm between two adjacent bolts, and an intermediate shaft is also used. There is a set of ring-shaped metal diaphragms at both ends to form two diaphragms. Couplings are respectively connected with the main and driven shafts to obtain better relative displacement; the annular metal diaphragm coupling is characterized by simple structure and convenient manufacturing, but its compensation for angular offset is a membrane The sheet is a function of the bending moment under the state of tension and compression, and there is a certain restraint constraint relationship between the axial offset compensation amount and the angular offset compensation amount. Due to structural limitations, its ability to compensate for angular displacement is very low , the angular stiffness is extremely large (the additional reaction force of the coupling to the shafting is extremely large), and its cushioning and vibration reduction performance is also poor, so it is only suitable for high-speed transmission shafting with relatively stable load;

[0004] The shrapnel element of the metal diaphragm disc coupling is composed of a single diaphragm (sheet), and the diaphragm generally includes a film disc of equal thickness section and a film disc of variable thickness section (such as reducing the thickness from the inner to the outer according to the hyperbolic law) And the waveform section membrane disc (the membrane disc has a wave shape in the axial section), among which the variable thickness section membrane disc can maintain the same strength condition, its material utilization rate is high, the integrity is good, it is especially suitable for high-speed transmission, but the manufacturing accuracy of the membrane disc requires Extremely high, not only greatly increases the production cost of the coupling, but also is difficult to popularize and use; the waveform section membrane disc has higher elasticity and better compensation performance. The thick hyperbolic type has better performance and is widely used at present. The above-mentioned structure also has the problem of extremely high manufacturing precision. Metal film disc couplings such as Bendix, Ameriflex, Kop-flex and other companies in the United States have more typical products.

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