Product Description
Product Description
Double ball rubber joint can be divided into single ball, double ball, different diameter body, curved ball and wind pressure coil. A tubular rubber piece consisting of an inner and outer rubber layer, a cord layer and a traveller is vulcanized and formed and then loosely combined with a metal flange or a parallel joint.
Product Parameters
Double sphere rubber bellows coupling is generally consist of the inner and the outer rubber layer and fabric reinforced layer (the enhancement layer has a multilayer spreading cord fabric), vulcanization molded in high temperature and high pressure , then assembly together with rubber tube and metal flange or parallel joint sleeve.
No. Name Material
1 Inner and outer rubber NR,NBR,EPDM etc
2 Frame Nylon cord fabric
3 Pressuring ring Steel wire
4 Flange Stainless steel or Carbon steel galvanized
| Nominal diameter DN | Length mm |
Center diameter of the bolt |
bolt hole diameter | bolt quantity | Axial displacement | Horizontal displacement (mm) |
Deflexion angle | ||
| mm | inch | Extension(mm) | Compression(mm) | (a1+a2)° | |||||
| 50 | 2 | 165 | 125 | 18 | 4 | 30 | 50 | 45 | 35° |
| 65 | 2 ½ | 175 | 145 | 18 | 4 | 30 | 50 | 45 | 35° |
| 80 | 3 | 175 | 160 | 18 | 8 | 35 | 50 | 45 | 35° |
| 100 | 4 | 225 | 180 | 18 | 8 | 35 | 50 | 40 | 35° |
| 125 | 5 | 230 | 210 | 18 | 8 | 35 | 50 | 40 | 35° |
| 150 | 6 | 325 | 240 | 22 | 8 | 35 | 50 | 40 | 35° |
| 200 | 8 | 325 | 295 | 22 | 8 | 35 | 50 | 40 | 35° |
| 250 | 10 | 325 | 350 | 22 | 12 | 35 | 60 | 35 | 30° |
| 300 | 12 | 325 | 400 | 22 | 12 | 35 | 60 | 35 | 30° |
Technical Conditions
|
|
DN200-DN300(8-12) | DN50-DN150(2-6) | |
| JGD-A(1) JGD-A(2) | JGD-A(3) | ||
| workiing pressure MPa |
1(10) | 1.6(16) | 2.5(25) |
| burst pressure MPa |
2(20) | 3(30) | 4.5(45) |
| vacuum degree KPa |
40(300) | 53.3(400) | 86.7(650) |
| applicable temperature | -15~115ºC specially reachable -30~250ºC | ||
|
applicable medium
|
“Air,water,sea water,vacuum,hot water,oil,acid,alkali,etc.” | ||
Data above is only for reference, if you want much more information, please contact us.
We have various types of molds and multiple sets rubber vulcanizing equipment, which can meet mass production and customization requirements.
Production process
products application
This product is widely used in chemical industry, construction, water supply and drainage, petroleum, heavy and light industry, refrigeration, sanitation, plumbing, fire protection, electric power and other basic engineering.According to different materials can be made of acid resistance, alkali resistance, corrosion resistance, oil resistance, high temperature resistance, radiation resistance, wear resistance, aging resistance and other varieties, to adapt to a variety of media and the environment.We can also do pressure testing.
Company Profile
HangZhou Ruixuan pipeline equipment factory was founded in 1996.It is an excellent enterprise specializing in manufacturing and selling pipe fittings.It’s located in Xicun village ,HangZhou city,ZheJiang province ,the concentrated area of pipeline equipment industry in China.The company factory is located in Xicun town pipeline equipment industrial park.It covered an area of20000 square meters.
At present, the company has the production capacity of pipeline equipment with a maximum diameter of 4000mm, and its main products are: Steel expansion joint, flexible waterproof sleeve, large diameter flange, double flange force transfer expansion joint, large deflection loose sleeve compensation joint, spherical compensation joint, sleeve compensator, bellows compensator, non-metallic compensator, rubber expansion joint, DC medium no thrust sleeve compensator, flexible expansion pipe and other pipeline equipment. The annual production capacity is 30 million sets.
The flexible telescopic pipe equipment is mainly used in the pipeline crossing different geological structures under different conditions and the application of pipe installation drop, reduce or avoid the impact of geological settlement and crustal activity on the pipeline, so that the construction unit can save more than 50% of the cost when purchasing the equipment. The rubber expansion joint series products of the company, the maximum production diameter of 3600mm, have been applied in millions of units of thermal power projects in China for many times, and have been praised by the users.
The company passed ISO9001:2008 quality management system certification in 2009 and ISO14000:2004 environmental management system certification in 2009. The company has a strict quality control system, standard production process, standard factory inspection hand section, to ensure that every product meets the national standards and customer requirements.
Business philosophy: responsible production of products, return the trust of customers; To build a community with a sense of belonging and appreciate employees’ contributions; Make a contribution to the society of enterprises, give back to the good times. HangZhou Ruixuan pipeline equipment factory is willing to work with friends from all walks of life hand in hand, mutual support, create a better future!
Certifications
FAQ
Q : Are you trading company or manufacturer?
A: We are manufacturer of rubber expansion joint,bellow, dismantling joint, dresser coupling, flange adapter and flange with more than 13-year experience.
Q: Do you have products catalog?
A: Yes, we have. Please tell me your email or instant messager, we will send our catalog.
Q: Can you provide drawings and technical data?
A: Yes, our professional technical department will design and provide drawings and technical data.
Q: Do you provide samples? Is it free or charged?
A: Yes, we can offer sample free but shipping charges covered by customer.
Q: How long is your delivery time?
A: Depends on QTY, but normally no more than 20 working days.
Q: Can the products be manufactuered by customer’s requirement?
A: Yes, the specifications stated above are the standard ones, we can design and manufacture as requirement.
Q: Visting factory is allowed or not?
A: Yes, we welcome customers visiting our factory. Our factory is located HangZhou city,ZheJiang province,China mainland
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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.
How do bellows couplings ensure torque transmission and minimize backlash in precision systems?
Bellows couplings are used in precision systems to transmit torque between two shafts while minimizing backlash, which is crucial for maintaining accurate positioning and reducing vibrations. Here’s how they achieve these functions:
- Torsional Rigidity: Bellows couplings are designed with a series of flexible metal convolutions (bellows) that allow angular misalignment between the shafts. The metal bellows provide high torsional rigidity, ensuring efficient torque transmission from one shaft to the other with minimal power loss.
- Backlash Elimination: Backlash is the play or movement that occurs when reversing the direction of rotation in a mechanical system. Bellows couplings are ideal for precision applications because they have virtually zero backlash. The absence of backlash helps maintain accurate positioning and prevents undesired movements in precision machinery.
- Compensation for Misalignment: In precision systems, shaft misalignments can occur due to manufacturing tolerances, thermal expansion, or other factors. Bellows couplings can accommodate angular, axial, and parallel misalignments, ensuring smooth operation and preventing excessive stress on the shafts and connected components.
- Vibration Damping: The flexible nature of bellows couplings also provides some level of vibration damping. This feature helps reduce vibrations and shocks in the system, which is especially important in sensitive precision equipment to maintain stability and accuracy.
- Compact Design: Bellows couplings are compact and lightweight compared to some other coupling types, making them suitable for applications where space and weight restrictions are important considerations.
In summary, bellows couplings play a crucial role in precision systems by ensuring efficient torque transmission, minimizing backlash, compensating for misalignments, dampening vibrations, and providing a compact design. These features make them an excellent choice for high-precision machinery and applications where accuracy and reliability are paramount.
What are the Key Design Considerations when using Bellows Couplings for Precision Applications?
When using bellows couplings in precision applications, several key design considerations must be taken into account to ensure optimal performance and accuracy. These considerations include:
- Torsional Stiffness: In precision applications, maintaining torsional stiffness is crucial to minimize angular deflection and maintain accurate positioning. Choose bellows couplings with high torsional stiffness to ensure precise torque transmission.
- Backlash-Free Design: Backlash can introduce positioning errors in precision systems. Select bellows couplings with minimal or zero backlash to maintain accurate motion control.
- Radial Runout: Ensure that the bellows coupling has low radial runout to prevent eccentricity and vibration during rotation, contributing to smoother operation.
- Material Selection: Choose materials with excellent fatigue resistance and high strength to withstand continuous operation and provide long-lasting performance.
- Misalignment Compensation: Evaluate the required misalignment compensation for the specific application. Bellows couplings should be capable of accommodating both angular and axial misalignments without sacrificing precision.
- Compact Size: For applications with limited space, consider compact bellows couplings that provide high torque capacity in a small form factor.
- Temperature and Corrosion Resistance: If the application involves extreme temperatures or harsh environments, opt for bellows couplings made from materials that offer temperature and corrosion resistance.
- Vibration Damping: Bellows couplings with good vibration damping properties help reduce resonance and maintain system stability during high-speed operations.
- Electrical Isolation: In precision applications with sensitive electronics, consider bellows couplings that provide electrical isolation to prevent electrical currents from passing between shafts.
- Customization: Some precision applications may require tailored solutions. Collaborate with coupling manufacturers to explore custom designs that meet specific requirements.
By carefully considering these design aspects, engineers can select the appropriate bellows coupling that aligns with the precision application’s needs, ensuring accurate motion control, reliability, and enhanced performance.
editor by CX 2024-05-08