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Method for connecting metal flanges with composite material transmission shaft formed by winding

A composite material and winding forming technology, which is applied in the direction of connecting components, couplings, rigid shaft couplings, etc., can solve the problems of difficult to ensure long-term stable load transmission of the drive shaft, complex load bearing, and reduced connection efficiency, achieving significant military Benefits and economic benefits, enhanced strength and deformation resistance, and the effect of solving reliability connection problems

Active Publication Date: 2012-03-14
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The connection between composite material and metal is mainly divided into three types: mechanical connection, adhesive connection and hybrid connection. Due to the complex bearing load of the composite material drive shaft, it is usually difficult to ensure the long-term stable load transmission of the drive shaft by using a single connection method. , for example, the composite material transmission shaft used in wind power generation is connected with the metal transmission mechanism by glue joint, and the glue layer often breaks and falls off after long-term use
In addition, the fiber-wound composite material is brittle and anisotropic, and mechanical connection is likely to lead to stress concentration at the connection part and reduce connection efficiency.

Method used

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  • Method for connecting metal flanges with composite material transmission shaft formed by winding
  • Method for connecting metal flanges with composite material transmission shaft formed by winding
  • Method for connecting metal flanges with composite material transmission shaft formed by winding

Examples

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Effect test

Embodiment 1

[0018] The total length of a composite drive shaft for a wind power generation equipment is 600mm. It is assembled by connecting a 480mm-long glass fiber reinforced resin-based composite hollow tube with metal flanges at both ends. The outer diameter of the middle section of the composite tube is 235mm, and the wall thickness is 15mm. The connecting section between the shaft and the flange is 95mm long. The original product uses adhesive bonding to connect the composite material shaft and the metal flange. Now the following connection scheme is adopted.

[0019] (1) The overall design of the connection structure

[0020] The connection between the composite material structure of the transmission shaft and the metal flanges at both ends is implemented by the patented pin key connection and adhesive joint scheme to ensure the smooth and reliable transmission of thrust and torque.

[0021] (2) The design of the connection structure between the main structure of the winding compos...

Embodiment 2

[0028] The total length of a composite material intermediate shaft for a ship is 1200mm. It is assembled by connecting a 1100mm long carbon fiber reinforced resin matrix composite material hollow tube with metal flanges at both ends. The length of the blue connection section is 95mm. In the original design, the composite material shaft and the metal flange are mechanically connected by screws, and the following connection scheme is now adopted.

[0029] (1) The overall design of the connection structure

[0030] The connection between the transmission shaft composite material structure and the metal flanges at both ends adopts the screw connection and glue connection scheme designed by this patent, and the mechanical connection part is partially reinforced by hoop winding S4 high-strength glass fiber composite material, and the two The length of end reinforcement is 120mm, and the wall thickness is 23mm to ensure the smooth and reliable transmission of thrust and torque.

[...

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Abstract

The invention belongs to connecting technologies of composite materials, in particular to a method for connecting metal flanges with a composite material transmission shaft formed by winding, a main body structure of the composite material transmission shaft formed by winding is combined with the metal flanges at two ends by bonding connection and mechanical connection, and the mechanical connection comprises the pin key connection and the screw connection; and the connection parts between the main body structure and the flanges can also be thickened through using a composite material for winding a fiber. The bonding connection structures in the adoption of the connection method have a certain deformation capacity, thereby reducing the problem of stress concentration of the connection parts; and the combination of the bonding connection and the mechanical connection can increase the strength and the anti-deformation capacity of the connection parts, realize the smooth transfer of torsion, tension and compression loads, effectively solve the problem of reliable connection of the composite material transmission shaft formed by winding and promote the applications of the composite material in a wider range as the material of the main body structure of the transmission shaft.

Description

technical field [0001] The invention relates to a composite material connection technology, in particular to a connection method between a wound-molded composite material transmission shaft and a metal flange. Background technique [0002] Winding composite transmission shafts are widely used in various fields such as construction machinery, wind power generation, locomotives and ship propulsion devices. Compared with traditional metal transmission shafts, composite transmission shafts are light in weight, corrosion-resistant, large in vibration It is magnetically conductive and maintenance-free. When it is applied to a long shafting system, the number of supporting bearings can be reduced, and it also has a strong displacement compensation function. In the actual application of composite transmission shaft, how to realize the smooth transmission of torsion, tension and compression loads of the shaft system, the design of the connection structure between the main structure o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B21/09F16D1/04
Inventor 郑劲东樊晓斌杨勇
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP