Product Description
GLJ Aluminum alloy double diaphragm set screw coupling
Description of GLJ Aluminum alloy double diaphragm sescrew coupling
>High torque rigidity, can accurately control the rotation of the shaft, can carry out high-precision control
>Designed for servo and stepping motor
>No gap between the shaft and sleeve connection, general for positive and negative rotation
>Low inertia, suitable for high speed operation
>The diaphragm is made of spring steel with excellent fatigue resistance
>With keyway design, positioning screw fastening way
Dimensions of GLJ Aluminum alloy double diaphragm sescrew coupling
| model parameter | common bore diameter d1,d2 | ΦD | L | LF | LP | d3 | S | F | M | tightening screw torque (N.M) |
| GLJ-19×27 | 3,4,5,6,6.35,7,8,9,9.525,10 | 19 | 27 | 9.1 | 5.2 | 9 | 1.8 | 4.25 | M3 | 0.7 |
| GLJ-26×32 | 4,5,6,6.35,7,8,9,9.525,10,11,12,12.7 | 26 | 32 | 10.7 | 5.4 | 12.5 | 2.6 | 4.5 | M4 | 1.7 |
| GLJ-32×41 | 6,6.35,7,8,9,9.525,10,11,12,12.7,13,14,15 | 32 | 41 | 12.75 | 8.5 | 16 | 3.5 | 6.12 | M4 | 1.7 |
| GLJ-39×47 | 6,6.35,7,8,9,9.525,10,11,12,12.7,13,14,15,16 | 39 | 47 | 15 | 8 | 19.3 | 4.5 | 6.62 | M5 | 4 |
| GLJ-44×53 | 8,9,9.525,10,11,12,12.7,14,15,16,17,18,19,20 | 44 | 53 | 18.25 | 7.5 | 22.5 | 4.5 | 8.12 | M6 | 8.4 |
| GLJ-56×64 | 10,11,12,12.7,13,14,15,16,17,18,19,20,22,24,25,28,30,32 | 56 | 64 | 19.75 | 13.5 | 32.5 | 5.5 | 6.4 | M6 | 8.4 |
| GLJ-68×75 | 12,14,15,16,17,18,19,20,22,24,25,28,30,32,35,38 | 68 | 75 | 23.35 | 15.7 | 45.5 | 6.3 | 7.7 | M8 | 10.5 |
| Anodizing treatment | Rated torque (N.M)* |
allowable eccentricity (mm)* |
allowable deflection angle (°)* |
allowable axial deviation (mm)* |
maximum speed rpm |
static torsional stiffness (N.M/rad) |
moment of inertia (Kg.M2) |
Material of shaft sleeve | Material of shrapnel | surface treatment | weight (g) |
| GLJ-19×27 | 1 | 0.12 | 1.5 | ±0.18 | 10000 | 170 | 8.8×10-7 | High strength aluminum alloy | S U S 3 0 4 Spring steel | Anodizing treatment | 13 |
| GLJ-26×32 | 1.5 | 0.15 | 1.5 | ±0.3 | 10000 | 820 | 2.8×10-6 | 29 | |||
| GLJ-32×41 | 2 | 0.17 | 1.5 | ±0.36 | 10000 | 1750 | 1.8×10-6 | 60 | |||
| GLJ-39×47 | 6 | 0.22 | 1.5 | ±0.45 | 10000 | 2850 | 2.7×10-5 | 101 | |||
| GLJ-44×53 | 9 | 0.22 | 1.5 | ±0.54 | 10000 | 3300 | 4.2×10-5 | 190 | |||
| GLJ-56×64 | 25 | 0.27 | 1.5 | ±0.72 | 10000 | 9480 | 1.6×10-4 | 318 | |||
| GLJ-68×75 | 60 | 0.32 | 1.5 | ±0.8 | 9000 | 19000 | 2.0×10-4 | 492 |
Safety Considerations When Using Diaphragm Couplings in Critical Applications
When using diaphragm couplings in critical applications, certain safety considerations are essential to ensure reliable and safe operation. Here are some important safety considerations:
- Proper Installation:
- Regular Inspections:
- Monitoring Temperature and Torque:
- Environment Compatibility:
- Redundancy and Backup Systems:
- Compliance with Industry Standards:
- Operator Training:
- Emergency Shutdown Procedures:
Ensure that the diaphragm coupling is installed correctly, following the manufacturer’s guidelines and recommended torque values for fasteners. Improper installation can lead to misalignment, excessive vibrations, and premature wear of the coupling components.
Perform regular inspections of the diaphragm coupling to check for signs of wear, fatigue, or damage. Regular maintenance helps identify potential issues early, allowing for timely replacement and preventing unexpected failures.
In critical applications, it’s crucial to monitor the temperature and torque levels of the diaphragm coupling during operation. Excessive heat or torque can lead to coupling failure, so having monitoring systems in place helps detect abnormal conditions and take necessary actions promptly.
Consider the operating environment of the diaphragm coupling. In corrosive environments, use materials that are resistant to chemical attacks, and in high-temperature settings, choose materials that can withstand elevated temperatures without compromising performance.
In critical applications, consider implementing redundancy or backup systems to ensure continued operation in the event of a failure. Having redundant couplings or alternative power transmission methods can enhance the overall reliability of the system.
Adhere to relevant industry standards and guidelines when selecting and using diaphragm couplings in critical applications. These standards ensure that the coupling meets specific safety and performance requirements.
Ensure that operators and maintenance personnel receive proper training on the installation, operation, and maintenance of the diaphragm coupling. Well-trained personnel can identify potential issues and take appropriate actions to maintain safe operation.
Establish clear emergency shutdown procedures to stop the machinery quickly in case of any abnormality or unsafe condition related to the diaphragm coupling. Emergency shutdown procedures are crucial for protecting personnel and equipment from harm.
By considering these safety considerations and implementing appropriate measures, diaphragm couplings can be used with confidence in critical applications, ensuring safe and reliable operation in various industries and systems.
Can Diaphragm Couplings Reduce Noise and Dampen Vibrations in Mechanical Systems?
Yes, diaphragm couplings can help reduce noise and dampen vibrations in mechanical systems. The design and material properties of diaphragm couplings contribute to their ability to minimize vibrations and noise during operation. Here’s how diaphragm couplings achieve this:
- Vibration Dampening:
- Misalignment Compensation:
- Reduced Mechanical Resonance:
- Smooth Torque Transmission:
- Compact Design:
Diaphragm couplings are designed to be flexible and allow a controlled amount of movement between the connected shafts. This flexibility helps dampen vibrations generated during the operation of rotating machinery. When vibrations occur due to load changes or misalignments, the diaphragm absorbs and dissipates these vibrations, preventing them from propagating through the system. As a result, diaphragm couplings can contribute to a smoother and quieter operation of mechanical systems.
As mentioned earlier, diaphragm couplings can accommodate axial, angular, and parallel misalignments between the connected shafts. Misalignment in rotating machinery can lead to increased vibrations and noise. By effectively compensating for misalignment, diaphragm couplings help maintain proper shaft alignment, reducing the risk of vibration-related issues and associated noise.
Mechanical resonance occurs when the natural frequency of a system matches the excitation frequency. It can lead to amplified vibrations and noise. Diaphragm couplings, with their ability to dampen vibrations, can help reduce the occurrence of mechanical resonance in rotating systems. By preventing the build-up of excessive vibrations, diaphragm couplings minimize the likelihood of resonance-related problems.
Diaphragm couplings provide smooth torque transmission between the shafts, resulting in a more uniform and stable power transfer. When torque is transmitted smoothly, there is less likelihood of sudden torque fluctuations that can cause vibrations and noise. The controlled flexibility of the diaphragm ensures that torque is transmitted efficiently, without introducing undesirable harmonics or disturbances in the system.
Diaphragm couplings have a compact and lightweight design compared to some other coupling types, such as gear couplings. This reduced mass and size help minimize inertial forces during operation, leading to lower levels of vibration and noise.
Overall, diaphragm couplings are effective in reducing noise and dampening vibrations in mechanical systems, making them suitable for applications where noise reduction and smooth operation are essential. Their ability to handle misalignments, dampen vibrations, and transmit torque accurately contributes to improved performance and reliability in various industrial settings.
How Do Diaphragm Couplings Handle Misalignment Between Shafts and Reduce Vibrations?
Diaphragm couplings are designed to handle misalignment between shafts and reduce vibrations effectively. Here’s how they achieve these functionalities:
- Misalignment Handling: Diaphragm couplings can accommodate three types of misalignment: angular, parallel, and axial misalignment.
- Angular Misalignment: When the shafts are not perfectly aligned and have angular offset, the flexible diaphragm in the coupling can flex and bend, allowing for relative movement between the shafts without transmitting excessive torque loads or inducing stress on the machinery.
- Parallel Misalignment: In cases where the shafts have parallel misalignment (i.e., horizontal offset), the diaphragm can also flex and move laterally to accommodate the misalignment while maintaining a continuous connection between the two hubs.
- Axial Misalignment: Diaphragm couplings can also handle axial misalignment (i.e., axial displacement), as the flexible diaphragm can compress or elongate slightly to adjust for the axial movement of the shafts.
- Vibration Reduction: Diaphragm couplings are known for their ability to dampen vibrations, which helps in reducing vibration levels in the connected machinery and the overall mechanical system.
- Flexible Diaphragm: The key component that enables vibration reduction is the flexible diaphragm. As the diaphragm flexes in response to misalignment or torque loads, it absorbs and dissipates vibrations, preventing them from being transmitted through the coupling and into the system.
- Natural Frequency: The design of the diaphragm is tuned to have a specific natural frequency, which allows it to effectively dampen and attenuate vibrations within the desired range.
- Material Selection: The choice of material for the diaphragm is crucial in determining its vibration damping capabilities. Certain materials have better vibration-absorbing properties, making them ideal for use in diaphragm couplings.
In summary, diaphragm couplings handle misalignment between shafts by using the flexible diaphragm to accommodate angular, parallel, and axial misalignment. Additionally, they reduce vibrations by utilizing the same flexible diaphragm to dampen and absorb vibrations, enhancing the smooth operation and longevity of the connected machinery and mechanical systems.
editor by CX 2023-08-21