Prosthetic knee joints can be classified by the way that the flexion and extension (bending and straightening) of the knee joint is regulated. This is known as the control mechanism.
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There are two types of fluid control mechanism: pneumatic (air) and hydraulic (fluid). In each case, pistons move through the control medium as the knee bends and extends. As the pistons move, control valves provide varying degrees of resistance depending on the angle of the knee. These systems allow a different stiffness during different phases of gait. The result allows the user to walk more comfortably at different speeds.
Pneumatic (air) controlled knees have inner chambers which house a sliding piston. The piston seals against the side of the chamber much like a bicycle pump. As the piston moves, air is compressed by it, regulating the pressure against the bending and straightening moments of the knee. The pressure differential allows the user to walk more comfortably at different speeds.
Pneumatic Fittings Rotary Joint (pneumatic rotary joint) has the following advantages:
1. High-speed rotation performance: The pneumatic rotary joint adopts a bearing design to support the application of the machine in fast swinging and high-speed rotating parts. For example, in the pipe size range of φ4mm to φ16mm, its speed can reach 500r.p.m to 250r.p.m, ensuring efficient and smooth rotation operation.
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2. Wide applicability: The joint can be adapted to a variety of fluid media, including air and water (conditional), and is suitable for a variety of industrial environments. It has a wide range of working pressures, can work normally within 01.0Mpa, and can operate stably in the temperature range of -100Kpa to 060°C.
3. Compact structure and easy installation: The pneumatic rotary joint has a compact design, which is easy to install and integrate into the existing mechanical system. At the same time, its sturdy structure ensures stability and reliability for long-term use.
4. Easy maintenance: Due to its reasonable design, maintenance is relatively simple, reducing downtime and maintenance costs.
In summary, Pneumatic Fittings Rotary Joint plays an important role in industrial applications due to its advantages such as high-speed rotation performance, wide applicability, compact structure, convenient installation and easy maintenance.
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