Product Description

Flexible Beam Coupling Shaft Coupling

 

Description of Flexible Beam Coupling Shaft Coupling

1. One-piece metallic beam coupling
2. Zero backlash, flexible shaft
3. Spiral and parallel cut designs available
4. Accommodates misalignment and shaft endplay
5. Identical clockwise and counterclockwise rotation
6. Available in aluminum or stainless steel
7. Multiple bore and shaft connecting configurations
 

Parameter of Flexible Beam Coupling Shaft Coupling

Model	D (mm)	L (mm)	d1-d2 (mm)	hex screw	L1 (mm)	L2 (mm)	L3 (mm)	Fasten Torque (n.m)
LR-D-D15L20	15	20	3.0-8.0	M3.	2.5	2	0.4	1.2
LR-D-D19L25	19	25	6.0-10.0	M3.	3	2	0.4	1.2
LR-D-D25L30	25	30	8.0-12.0	M4	4	2	0.4	2.5
LR-D-D30L35	30	35	8.0-18.0	M4	4	2.5	0.5	2.5
LR-D-D35L40	35	40	8.0-22.0	M5	5	2.5	0.5	5
LR-D-D40L45	40	45	10.0-28.0	M6	6	3.5	0.6	8

Model	Max bore (mm)	Rated Torque (n.m)	Max Torque (n.m)	Max speed (rpm)	Moment of Inertia (kg.m2)	Permissible Radial Deviation (degree)	Permissible Angular Deviation (degree)
LR-D-D15L20	8	0.5	1	30000	2.5*10-7	0.05	0.5
LR-D-D19L25	10	1	2	25000	5.8*10-7	0.05	0.5
LR-D-D25L30	12	1.5	3	18000	1.8*10-6	0.05	0.5
LR-D-D30L35	18	2	4	16000	4.7*10-6	0.05	0.5
LR-D-D35L40	22	3	6	14000	1.1*10-5	0.05	0.5
LR-D-D40L45	28	6	12	12000	2.3*10-5	0.05	0.5

Model	D (mm)	L (mm)	d1-d2 (mm)	Fasten Torque (n.m)
LT-D-D15L20	15	20	4.0-5.0	0.7
LT-D-D19L25	19	25	6.0-10.0	0.7
LT-D-D25L30	25	30	8.0-12.0	0.7
LT-D-D30L35	30	35	8.0-18.0	1.7
LT-D-D35L40	35	40	8.0-22.0	4
LT-D-D40L45	40	45	10.0-28.0	4

Model	Max bore (mm)	Rated Torque (n.m)	Max Torque (n.m)	Max speed (rpm)	Moment of Inertia (kg.m2)	Permissible Radial Deviation (degree)	Permissible Angular Deviation (degree)
LT-D-D15L20	5	0.5	1	30000	2.5*10-7	0.05	0.5
LT-D-D19L25	10	1	2	25000	5.8*10-7	0.05	0.5
LT-D-D25L30	12	1.5	3	18000	1.8*10-6	0.05	0.5
LT-D-D30L35	18	2	4	16000	4.7*10-6	0.05	0.5
LT-D-D35L40	22	3	6	14000	1.1*10-5	0.05	0.5
LT-D-D40L45	28	6	12	12000	2.3*10-5	0.05	0.5

 

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Comparison of Beam Couplings to Other Coupling Types in Terms of Backlash and Torsional Stiffness

When considering coupling options for motion control systems, two critical performance characteristics to evaluate are backlash and torsional stiffness. Backlash refers to the amount of rotational play or free movement between the connected shafts, while torsional stiffness indicates a coupling’s ability to resist torsional deformation when transmitting torque. Let’s compare beam couplings to other common coupling types in terms of these factors:

• Beam Couplings:

  Beam couplings generally exhibit low to minimal backlash due to their single or multiple helical beam design. The helical beams provide some flexibility to accommodate misalignment, but they maintain a relatively tight connection between the shafts, resulting in low backlash. This characteristic is especially valuable in precision motion control applications where eliminating play is essential for accurate positioning.

  In terms of torsional stiffness, beam couplings offer moderate to high values. The helical beams provide good torsional rigidity, making them suitable for applications that demand precise torque transmission and minimal torsional deflection. However, compared to other types like disc or jaw couplings, beam couplings may have slightly lower torsional stiffness.

• Disc Couplings:

  Disc couplings are known for their excellent torsional stiffness, providing robust torque transmission and minimal torsional deformation. They are ideal for applications requiring high precision and where torsional rigidity is critical.

  Regarding backlash, disc couplings typically have low to negligible values. Their design allows for precise and direct transmission of torque between the shafts, resulting in minimal rotational play.

• Jaw Couplings:

  Jaw couplings offer low to moderate torsional stiffness, making them suitable for applications with moderate torque requirements. They provide some flexibility to handle misalignment, but their torsional rigidity is not as high as disc couplings or certain types of beam couplings.

  Backlash in jaw couplings can vary depending on the specific design and materials. Some jaw couplings may have slightly more backlash compared to beam or disc couplings due to the elastomeric spider element used in their construction.

• Oldham Couplings:

  Oldham couplings offer low backlash performance due to their unique three-piece design, which incorporates two outer hubs and a middle disk. The design allows for consistent torque transmission and minimal play between the shafts.

  Torsional stiffness in Oldham couplings is moderate, providing a balance between flexibility and rigidity. While not as rigid as disc couplings, they still offer reliable torque transmission for various motion control applications.

In summary, beam couplings offer low to minimal backlash and moderate to high torsional stiffness, making them suitable for precision motion control applications that require a balance between flexibility and rigidity. Disc couplings provide excellent torsional stiffness and low backlash, making them an ideal choice for high-precision applications. Jaw couplings and Oldham couplings offer moderate performance in both backlash and torsional stiffness and are well-suited for applications with moderate torque and misalignment compensation requirements.

When selecting a coupling type, consider the specific needs of your application, such as the required precision, torque capacity, and misalignment compensation. Each coupling type has its advantages and limitations, and choosing the right one will contribute to the overall performance and reliability of your motion control system.

Contribution of Beam Couplings to Overall Efficiency and Reliability of Motion Systems

Beam couplings play a crucial role in enhancing the overall efficiency and reliability of motion control systems in various industrial applications. Their unique design and material properties contribute to these advantages in several ways:

• High Torque Transmission:

  Beam couplings provide efficient torque transmission between shafts, allowing for precise and reliable power transfer. They can handle high torque loads without introducing backlash or slippage, ensuring accurate motion control and consistent performance.

• Flexibility and Misalignment Compensation:

  Beam couplings offer flexibility, allowing them to accommodate small shaft misalignments. This characteristic reduces stress on the connected components and bearings, minimizing wear and enhancing the system’s overall reliability.

• Low Inertia:

  Due to their lightweight design, beam couplings have low inertia, which means they have minimal impact on the system’s acceleration and deceleration. This low inertia helps in achieving faster response times and smoother motion profiles, improving the overall efficiency of the system.

• Vibration Dampening:

  Beam couplings dampen vibrations and absorb shocks generated during operation. By reducing vibrational energy transmission, they minimize the risk of resonance and prevent premature wear or damage to the motion system components.

• Wide Range of Sizes and Materials:

  Manufacturers offer beam couplings in various sizes and materials to suit different application requirements. This versatility allows for optimal coupling selection based on factors such as torque capacity, shaft diameter, and environmental conditions, ensuring an efficient and reliable coupling solution.

• Easy Installation and Maintenance:

  Beam couplings are relatively simple to install and maintain. Their clamp or set screw mounting methods simplify the coupling assembly process. Additionally, routine maintenance, such as lubrication and visual inspections, helps extend their lifespan and ensures continuous system reliability.

• Non-Magnetic and Electrical Isolation Options:

  Some beam couplings are available in non-magnetic materials, such as plastic or brass, which are suitable for applications where magnetic interference must be minimized. Additionally, plastic couplings offer electrical isolation properties, making them useful in applications requiring electrical insulation.

Overall, beam couplings contribute significantly to the overall efficiency and reliability of motion systems by providing precise torque transmission, compensating for misalignment, minimizing vibrations, and offering a broad range of options to meet diverse application needs. Their durable construction and ease of installation make them a dependable choice for motion control in various industrial settings.

Selecting the Appropriate Beam Coupling for Your Motion Control Needs

Choosing the right beam coupling for your specific motion control needs involves considering several factors to ensure optimal performance and reliability. Here’s a step-by-step guide to help you make an informed decision:

1. Identify Application Requirements:

   Start by understanding the specific requirements of your motion control application. Consider factors such as the type and amount of misalignment, torque capacity, shaft sizes, operating environment, speed, and precision requirements.

2. Types of Beam Couplings:

   Familiarize yourself with the different types of beam couplings available, such as single-beam, multi-beam, bellows, servo disc, slit, step beam, and jaw couplings with beam elements. Each type has unique characteristics that cater to different motion control needs.

3. Misalignment Compensation:

   Assess the level of misalignment in your application. If you require compensation for angular, axial, and parallel misalignment, multi-beam or bellows couplings might be suitable. For primarily angular misalignment, a single-beam coupling could be sufficient.

4. Torsional Rigidity:

   Consider the required torsional rigidity for precise motion control. Servo disc couplings offer high torsional rigidity and low backlash, making them ideal for precision applications, while slit couplings provide more torsional flexibility and vibration dampening.

5. Environmental Factors:

   Take into account the operating environment, including temperature, humidity, and exposure to chemicals. Choose a beam coupling with materials that can withstand the environmental conditions of your application.

6. Speed and Torque Capacity:

   Evaluate the speed and torque requirements of your motion control system. Ensure that the selected coupling can handle the specified torque while maintaining the desired speed without compromising performance.

7. Space Constraints:

   If your application has limited space, consider compact designs like single-beam or slit couplings. These types can efficiently fit into tight spaces while providing the necessary misalignment compensation.

8. Backlash and Precision:

   For applications that demand minimal backlash and high precision, servo disc couplings are a suitable choice due to their exceptional torsional rigidity and accurate torque transmission.

9. Vibration Dampening:

   If your system requires vibration dampening to protect sensitive components or improve overall performance, consider beam couplings with features like slits or bellows.

10. Customization Options:

    Check if the coupling supplier offers customization options. Some manufacturers can tailor the beam coupling to meet specific application requirements, providing an optimal solution for your motion control needs.

11. Consult with Experts:

    If you are uncertain about the best beam coupling choice for your application, consult with motion control experts or the coupling manufacturer’s technical support team. They can offer valuable insights and recommendations based on your specific needs.

By carefully evaluating these factors and considering the advantages and limitations of each beam coupling type, you can select the most appropriate coupling for your motion control needs. Making the right choice will contribute to the efficiency, reliability, and longevity of your motion control system.

editor by CX 2024-04-25