Product Description

Product Description:

Single ball rubber joint is a kind of pipeline joint which is high-flexibility,high-gas tightness,resistance to medium and climate. Limit displacement and Prevent pull off  rubber joint is usually composed of inner rubber layer,fabric reinforcement layer(reinforcement layer have multilayer frictioning nylon cord fabric),middle rubber layer,outer rubber layer,top reinforce metal ring or bead ring. After high pressure, high temperature vulcanization and become. It can reduce the vibration and noise of pipeline.It can also compensate for the Thermal expansion and  cold contraction caused by temperature changed.

Product features:

1.Small volume, light weight, good elasticity, easy installation and maintenance.
2.After installation, it can assimilate horizontal, axial and angular displacement caused by pipeline vibration.
3.After installation, it can reduce the noise which produced by the pipeline and water pump etc.
4.Inside has seamless high pressure rubber joint more effectively prevent rubber joint’s inner walls from being corroded by corrosive medium in high temperature resistance,acid and alkali resistant,oil resistance pipeline and raised working life.


Technics  condition





work pressure MPa( kgf/cm 2 )

1.0(10 )

1.6 ( 16 )

2.5 ( 25 )

explosion pressure MPa( kgf/cm 2 )

2.0 ( 20 )

3.0 ( 30 )

4.5 ( 45 )

vacuum degree KPa(mm/Hg)

53.3 ( 400 )

86.7 ( 650 )

100 ( 750 )

 Applicable  temperature

-15 ºC~ 115 ºC special can reach -30 ºC ~ 250 ºC

Applicable medium

Air,compressed air,water,sea water,hot water,oil,acid,alkali etc.

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bellows coupling

How Do Bellows Couplings Contribute to Reducing Vibrations and Ensuring Smooth Operation?

Bellows couplings play a crucial role in reducing vibrations and ensuring smooth operation in mechanical power transmission systems. They achieve this through their unique design and material characteristics, which allow them to absorb and dampen vibrations effectively. Here’s how bellows couplings contribute to minimizing vibrations and promoting smooth operation:

  • Flexible Bellows Design: Bellows couplings feature a thin-walled, accordion-like structure known as the bellows. This design provides flexibility in multiple directions, allowing the coupling to compensate for minor misalignments and shaft movements. The bellows’ flexing action absorbs shocks and vibrations, preventing them from propagating through the system and reducing the transmission of vibration to connected equipment.
  • Vibration Damping: The flexible bellows act as a vibration damper, absorbing and dissipating vibrational energy generated during the operation. When the system experiences dynamic forces or sudden shocks, the bellows expand and contract to absorb these forces, preventing them from resonating throughout the system. This damping action helps maintain the stability of the machinery and prevents excessive wear and tear on components.
  • No Mechanical Contact: Unlike some coupling types that rely on friction or mechanical contact, bellows couplings transmit torque through pure flexure without any metal-to-metal contact. This feature eliminates backlash and torsional wind-up, further reducing vibration and ensuring smoother operation. As a result, bellows couplings are well-suited for applications requiring high precision and minimal vibration-induced errors.
  • High Torsional Stiffness: While bellows couplings are designed to be flexible, they still possess high torsional stiffness. This stiffness ensures accurate torque transmission without any loss, contributing to the overall efficiency and smoothness of the system’s operation.
  • Resonance Avoidance: Bellows couplings are designed to have specific critical speeds and resonant frequencies that prevent resonance from occurring within the coupling itself. Resonance can lead to severe vibration amplification, which can be detrimental to the equipment and surrounding components. The careful design of bellows couplings helps avoid such resonance issues.

By effectively dampening vibrations, absorbing shocks, and providing torsional stiffness, bellows couplings contribute to smoother operation, reduced mechanical wear, and increased overall system reliability. Their ability to handle misalignments and their high torsional stiffness make them a popular choice in precision motion control systems, robotics, and various industrial applications where smooth and accurate performance is essential.

bellows coupling

Real-World Examples of Successful Bellows Coupling Installations and Their Benefits

1. Aerospace Industry: In aircraft engines, bellows couplings are used to connect the engine shaft to various auxiliary components, such as generators and pumps. These couplings provide precise torque transmission, compensate for misalignments, and dampen vibrations. The benefits include increased reliability, reduced maintenance, and enhanced overall performance of the aircraft engine.

2. Medical Equipment: In medical devices like MRI machines, bellows couplings are employed to transmit motion between various components with high precision and minimal backlash. The bellows couplings’ ability to accommodate axial and angular misalignments is crucial in such applications, ensuring smooth and accurate operation. The benefit is improved imaging quality and reduced wear and tear on the equipment.

3. Robotics and Automation: In industrial robots, bellows couplings are used in joint assemblies to connect the motor shaft to the robot arm. The couplings’ flexibility allows the robot arm to move smoothly and accurately, enabling precise positioning and reducing mechanical stress on the components. This leads to higher robot accuracy and faster cycle times in automated manufacturing processes.

4. Semiconductor Manufacturing: In semiconductor fabrication equipment, bellows couplings play a vital role in wafer handling systems. The couplings help maintain precise alignment between the components, ensuring accurate wafer positioning and minimizing the risk of damage to sensitive semiconductor materials. The benefit is improved yield and production efficiency in the semiconductor manufacturing process.

5. Oil and Gas Industry: In oil rigs and drilling equipment, bellows couplings are used in the drive systems to transmit torque from the power source to various components like pumps and compressors. The couplings’ ability to withstand harsh environmental conditions, including high temperatures and corrosive environments, makes them suitable for oil and gas applications. The benefit is increased equipment reliability and reduced downtime in critical oil and gas operations.

6. Precision Machinery: In high-precision machines such as CNC machining centers, bellows couplings are utilized in the spindle drive systems. The couplings’ backlash-free operation and high torsional stiffness contribute to the machine’s accuracy and repeatability during machining operations. The benefit is improved surface finish, reduced part rejections, and enhanced productivity in precision manufacturing processes.

7. Renewable Energy: In wind turbine systems, bellows couplings are employed to connect the generator shaft to the wind turbine rotor. The couplings’ ability to accommodate misalignments caused by wind and load variations helps prevent excessive stress on the turbine’s components and ensures efficient power generation. The benefit is increased energy capture and longer service life for wind turbines.

Overall, bellows couplings have demonstrated their effectiveness and versatility across various industries by providing reliable and efficient motion control solutions. Their ability to handle misalignments, dampen vibrations, and transmit torque accurately makes them valuable components in a wide range of applications, ultimately leading to improved performance, reduced downtime, and enhanced productivity in diverse industrial processes.

“`bellows coupling

What is a Bellows Coupling, and How is it Used in Mechanical Power Transmission?

A bellows coupling is a type of flexible coupling used in mechanical power transmission systems to connect two shafts while allowing for angular misalignment, axial motion, and torsional flexibility. It consists of a thin-walled metallic bellows element that resembles an accordion or bellows, which gives the coupling its name. The bellows is typically made of stainless steel, providing it with the necessary flexibility and durability for various applications.

When used in mechanical power transmission, a bellows coupling accommodates misalignments between the connected shafts. These misalignments can be in the form of angular misalignment, where the shafts are not perfectly aligned in a straight line, or axial misalignment, where there is some linear movement along the shaft axis. Additionally, the bellows element provides torsional flexibility, allowing the coupling to transmit torque while compensating for slight shaft misalignments.

The bellows coupling works by absorbing and redistributing the misalignment forces through the flexing of the bellows element. As the shafts rotate, any misalignment causes the bellows to flex, allowing the coupling to maintain a continuous transmission of torque while reducing stress on the connected shafts. This flexibility also helps dampen vibrations and shock loads, protecting the connected components from excessive wear and fatigue.

One of the significant advantages of using a bellows coupling is its high torsional stiffness. The bellows element provides excellent torsional rigidity, making it suitable for applications where precise motion control and minimal torsional backlash are essential.

Bellows couplings find applications in various industries, including robotics, aerospace, medical devices, semiconductor manufacturing, and precision machinery. They are commonly used in applications where accurate positioning, high torque transmission, and compensating for misalignments are critical requirements.

In summary, a bellows coupling is a flexible and robust coupling solution that allows for angular misalignment, axial motion, and torsional flexibility in mechanical power transmission systems. Its ability to accommodate misalignments while maintaining high torsional stiffness makes it a preferred choice in precision positioning and motion control applications.

China wholesaler CHINAMFG Rubber Bellows Flexible Pipe Joint Coupling with Floating Flange  China wholesaler CHINAMFG Rubber Bellows Flexible Pipe Joint Coupling with Floating Flange
editor by CX 2024-04-11