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Flexible couplings are used to connect two shafts having axial, radial and angular misalignment. Flexible couplings are used to transmit torque from one shaft to another when the two shafts are slightly misaligned. Flexible couplings can accommodate varying degrees of misalignment up to 3° and some parallel misalignment. In addition, flexible couplings can also be used for vibration damping or noise reduction.
What is flexible coupling?
What are the features of flexible coupling?
What is the development of flexible coupling?
Gear Couplings are usually rigid couplings. These can transmit the highest amount of torque from one end to the other end. These gear couplings can be designed in a completely flexible model where it can accommodate the parallel misalignment. In a complete flexible gear coupling model, both sides of the gear coupling come with a sleeve and hub with external gear tooth, which will provide a double flexible engagement for all three misalignments.
Old-ham coupling usually provides a huge amount of parallel misalignment. It consists of three members. There is a floating member trapped in between the other two members by means of 90° grooves on both sides of the floating member.
The disc coupling is having a thin sheet of discs laminated as the main part of the coupling for the flexibility to accommodate the misalignments. It consists of two hubs on each side and a spacer at the middle joined by the discs on both sides.
Universal joint is well known to us. It is a linkage consisting of two yokes connected by a spider. Universal joint can accommodate massive angular misalignments, which is mainly used for the lengthy shaft linings supported by bearings.
Bushed pin type coupling is a simple type of coupling with two flanges bolted with the help bolt and nut covered by bush made up of rubber. These rigid couplings are also accommodating all three misalignments. Because of its simple design, these are less expensive.
Torsional couplings are mostly to accommodate the torsional vibration. Most of these are rubber coupling where it can dampen the vibrations and also accommodate the misalignments. Also, spring torsional couplings are also available as the torsional couplings.
A flexible coupling is a mechanical device that allows an adjustable union to be formed between otherwise inflexible pipes or shafts. Flexible couplings permit transfer rotational motion between shafts and a continuous gas or fluid tight seal between pipes while allowing for a degree of axial misalignment.
1. Flexible coupling is one-piece metal elastomer.
2. Flexible coupling has zero backlash and can perform synchronous operation.
3. Flexible coupling has elastic action compensates radial, angular and axial deviations.
4. Flexible coupling is high torque rigidity and excellent sensitivity.
5. Characteristic of flexible coupling is that clockwise and counterclockwise rotation are exactly the same.
6. Flexible coupling is maintenance-free, oil and corrosion resistance.
7. There are aluminum alloy and stainless-steel materials for selection of flexile coupling.
8. There are two main fixing methods of flexible coupling that are top wire and clamping.
In our country, the technology and production of flexible industrial couplings have experienced 4 links.
In 1960s and 1970s, the flexible coupling is to rely on self-reliance, and cooperate with various mechanical equipment to manufacture certain couplings. Its characteristic is that the power and the variety is small, and the scale of operation is not enough.
In the 1970s and 1980s with the opening up was expanded, some invention patents and overseas excellent industrial equipment were introduced, and the technical development trend of shaft couplings was integrated. Chinese application promotion played a leading role.
The third stage is from the 1980s to the 21st century. After nearly 30 years of development trends, with the diligence of Chinese mechanical engineers, the flexible couplings produced and manufactured meet the Chinese regulations, and the technical expertise and national standards for flexible couplings have been produced.
The fourth stage is the 21st century up to now. Following the development trend of contemporary new technology, China's high-tech independent product research and development capabilities and technological innovation capabilities have improved. The development trend in my country's flexible coupling manufacturing industry is rapid. The development trend and advancement of China's couplings are technically and even beyond the norm.
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