China Standard DIN BS Jrs DN250 10″ Universal Wide Range Flexible Ductile Iron Straight Coupling

Product Description

DN250 10″ Universal Wide Range Flexible Ductile Iron Straight Coupling

MATERIALS
ITEM PARTS MATERIAL
1 Body BSEN1563 EN-GJS(QT)-450-10/Carbon Steel
2 Gland BSEN1563 EN-GJS(QT)-450-10
3 Seals EPDM/NBR
4 Fasteners Stainless Steel/Carbon Steel with Dacromet Coating/GAL Carbon Steel
5 Coating Fusion Bonded Epoxy

DIMENSIONS(PN10/PN16)
DN RANGE L L1 H ID ID1 OD N-MSXL1 BOLT TORQUE WIGHT(KG)
(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (Nm)
50 59-72 188 148 95 72 76 153 4-M12*180 55-65 4.1
65 72-85 188 148 95 85 89 173 4-M12*180 55-65 4.1
80 88-103 188 146 95 103 107 185 4-M12*180 55-65 4.1
100 109-128 188 146 95 127 132 208 4-M12*180 55-65 4.6
125 138-153 198 153 95 158 162 256 4-M12*190 55-65 8.3
150 159-182 198 153 95 182 186 280 4-M12*190 55-65 8.5
175 189-212 233 187 130 211 216 329 4-M12*225 55-65 9.0 
200 218-235 233 187 130 234 239 333 4-M12*225 55-65 10.6
225 242-262 233 185 130 261 265 379 6-M12*225 55-65 14.5
250 272-289 233 186 130 288 295 391 6-M12*225 55-65 15.4
300 315-349 233 187 130 349 352 464 6-M12*225 55-65 20.0 
322-339 233 187 130 338 345 444 6-M12*225 55-65 23.1
338-360 233 187 130 359 366 460 6-M12*225 55-65 23.1
350 351-391 250 187 130 390 395 502 10-M12*225 55-65 26.8
400 400-442 250 187 130 441 446 558 10-M12*225 55-65 31.9
450 455-493 250 187 130 492 497 608 10-M12*225 55-65 36.6
500 500-599 250 187 130 598 594 662 10-M12*225 55-65 40.0 
600 600-692 250 187 130 691 697 768 10-M12*225 55-65 42.0 
700 708-780 250 187 130 779 785 910 10-M12*225 55-65 45.0 

 

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flexible coupling

How does a flexible coupling deal with backlash and torsional stiffness?

A flexible coupling deals with backlash and torsional stiffness in the following ways:

  • Backlash: Backlash refers to the play or clearance between mating teeth in mechanical systems. In certain couplings, such as gear couplings, some degree of backlash is unavoidable due to the space between the teeth. However, flexible couplings with elastomeric or beam-type elements typically have minimal to no backlash. The flexibility of these elements allows them to maintain continuous contact and transmit torque smoothly without any gaps or play between components.
  • Torsional Stiffness: Torsional stiffness is the ability of a coupling to resist rotational deformation or twisting under torque. It is essential to have adequate torsional stiffness in some applications to ensure accurate motion transmission and responsiveness. Flexible couplings exhibit a balance between torsional stiffness and flexibility. While they allow for a degree of angular and parallel misalignment, they still possess sufficient torsional stiffness to transmit most of the torque efficiently. This characteristic helps maintain the precision of motion control systems and prevents power losses due to deformation.

The design and materials used in flexible couplings contribute to their ability to address both backlash and torsional stiffness effectively. Here are some key features:

  • Elastomeric Elements: Couplings with elastomeric elements, such as rubber or polyurethane, provide excellent flexibility to absorb misalignments and dampen vibrations. They also exhibit minimal backlash as the elastomeric material maintains continuous contact between the coupling components.
  • Beam-Type Couplings: Beam-type couplings use thin metal beams to transmit torque. These couplings offer high torsional stiffness while still accommodating misalignments. The beams can flex slightly under torque, absorbing shocks and compensating for misalignment without compromising torsional rigidity.
  • Composite Couplings: Some flexible couplings use composite materials that combine the advantages of different materials to achieve specific performance characteristics. These composites can offer low backlash and precise torsional stiffness, making them suitable for demanding applications.
  • High-Quality Manufacturing: The precision manufacturing of flexible couplings ensures that components fit together with minimal clearances, reducing backlash. Additionally, high-quality materials contribute to better torsional stiffness and overall performance.

Overall, flexible couplings strike a balance between flexibility to accommodate misalignments and sufficient torsional stiffness to transmit torque efficiently. By effectively addressing backlash and torsional stiffness, these couplings contribute to the smooth and reliable operation of various mechanical systems.

flexible coupling

How does a flexible coupling handle misalignment in large rotating equipment?

Flexible couplings are designed to accommodate various types of misalignment in large rotating equipment, ensuring smooth and efficient power transmission while minimizing stress on connected components. Here’s how flexible couplings handle different types of misalignment:

  • Angular Misalignment: Angular misalignment occurs when the axes of the two connected shafts are not collinear and form an angle. Flexible couplings can handle angular misalignment by allowing the coupling elements to flex and move slightly, thus accommodating the angle between the shafts. The flexible elements, often made of elastomeric materials or metallic membranes, can bend and twist to compensate for angular misalignment, ensuring that the coupling remains engaged and transfers torque effectively.
  • Parallel Misalignment: Parallel misalignment, also known as offset misalignment, happens when the two shafts are not perfectly aligned along their axes, resulting in a lateral shift. Flexible couplings can handle parallel misalignment through their ability to move radially, allowing the flexible elements to adjust and take up the offset. This capability prevents excessive side loads on the shafts and bearings, reducing wear and increasing the lifespan of the equipment.
  • Axial Misalignment: Axial misalignment occurs when there is a linear displacement of one shaft relative to the other, either toward or away from the other shaft. Some flexible couplings, such as certain types of flexible disc couplings, can accommodate a limited amount of axial misalignment. However, for large axial movement, other types of couplings or special designs may be required.

The flexibility of the coupling elements allows them to act as a buffer between the shafts, dampening shocks, vibrations, and torsional forces caused by misalignment or other dynamic loads. This helps protect the connected equipment from damage and enhances the overall performance and reliability of the rotating system.

In large rotating equipment, where misalignment is more common due to thermal expansion, foundation settling, or other factors, flexible couplings play a critical role in maintaining smooth operation and reducing stress on the machinery. However, it is essential to choose the appropriate type of flexible coupling based on the specific requirements of the application and to regularly inspect and maintain the coupling to ensure optimal performance and longevity.

flexible coupling

Are there any safety considerations when using flexible couplings in rotating machinery?

Yes, there are several safety considerations to keep in mind when using flexible couplings in rotating machinery. While flexible couplings offer numerous benefits in terms of misalignment compensation, vibration isolation, and shock absorption, improper use or maintenance can lead to safety hazards. Here are some important safety considerations:

  • Proper Installation: Ensure that the flexible coupling is installed correctly and securely following the manufacturer’s guidelines. Improper installation can lead to coupling failure, unexpected disconnection, or ejection of coupling components, which may result in equipment damage or injury to personnel.
  • Alignment: Proper shaft alignment is essential for the reliable and safe operation of flexible couplings. Misaligned shafts can cause excessive stress on the coupling and connected components, leading to premature wear and possible failure. Regularly check and maintain proper shaft alignment to prevent safety risks.
  • Operating Conditions: Consider the environmental and operating conditions of the machinery when selecting a flexible coupling. Some couplings are designed for specific temperature ranges, hazardous environments, or corrosive atmospheres. Using a coupling that is not suitable for the operating conditions can compromise safety and performance.
  • Torque and Speed Limits: Always operate the flexible coupling within its specified torque and speed limits. Exceeding these limits can cause coupling failure, leading to unexpected downtime, equipment damage, and potential safety hazards.
  • Maintenance: Regularly inspect and maintain the flexible coupling to ensure its continued safe operation. Check for signs of wear, damage, or corrosion, and promptly replace any worn or damaged components with genuine parts from the manufacturer.
  • Emergency Stop Mechanism: In applications where safety is critical, consider implementing an emergency stop mechanism to quickly halt machinery operation in case of coupling failure or other emergencies.
  • Personal Protective Equipment (PPE): When working with rotating machinery or during maintenance tasks involving couplings, personnel should wear appropriate PPE, such as gloves, eye protection, and clothing that can resist entanglement hazards.
  • Training and Awareness: Ensure that personnel working with the machinery understand the potential hazards associated with flexible couplings and receive proper training on safe handling, installation, and maintenance procedures.

By adhering to these safety considerations, operators and maintenance personnel can mitigate potential risks and ensure the safe and reliable operation of rotating machinery with flexible couplings. Additionally, it is essential to comply with relevant safety standards and regulations specific to the industry and application to ensure a safe working environment.

China Standard DIN BS Jrs DN250 10China Standard DIN BS Jrs DN250 10
editor by CX 2024-04-26


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