Product Description

Customized jaw coupling for servo motor,aluminum jaw coupling,jaw couplings stainless steel

Product Name	Jaw coupling for servo motor,aluminum jaw coupling,jaw couplings stainless steel
DN mm	12~160mm
Rated Torque	25~25000 N·m
Allowable speed	15300~1500 N·m
Material	35CrMo/ZG270/45# steel/Aluminum alloy
Application	Widely used in metallurgy, mining, engineering and other fields.

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Application Case

Typical case of diaphragm coupling applied to variable frequency speed control equipment

JMB type coupling is applied to HangZhou Oilfield Thermal Power Plant

According to the requirements of HangZhou Electric Power Corporation, HangZhou Oilfield Thermal Power Plant should dynamically adjust the power generation according to the load of the power grid and market demand, and carry out the transformation of the frequency converter and the suction fan. The motor was originally a 1600KW, 730RPM non-frequency variable speed motor matched by HangZhou Motor Factory. The speed control mode after changing the frequency is manual control. Press the button speed to increase 10RPM or drop 10RPM. The coupling is still the original elastic decoupling coupling, and the elastic de-coupling coupling after frequency conversion is frequently damaged, which directly affects the normal power generation.

It is found through analysis that in the process of frequency conversion speed regulation, the pin of the coupling can not bear the inertia of the speed regulation process (the diameter of the fan impeller is 3.3 meters) and is cut off, which has great damage to the motor and the fan.

Later, they switched to the JMB460 double-diaphragm wheel-type coupling of our factory (patent number: ZL.99246247.9). After 1 hour of destructive experiment and more than 1 year of operation test, the equipment is running very well, and there is no Replace the diaphragm. 12 units have been rebuilt and the operation is in good condition.

 

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Thermal Considerations and Limits for Continuous Operations with Servo Couplings

Servo couplings, like many mechanical components, can experience temperature changes during continuous operation. It is essential to consider thermal factors and establish temperature limits to ensure the proper functioning and longevity of the couplings. Here are the key thermal considerations and limits:

• Temperature Ratings:

  Manufacturers provide temperature ratings for servo couplings, indicating the range of temperatures in which the couplings can operate safely. It is crucial to stay within these specified temperature limits to prevent potential damage to the coupling or its connected components.

• Heat Dissipation:

  Servo couplings may generate heat during operation due to friction and torsional loads. The ability of the coupling to dissipate heat effectively helps prevent excessive temperature rise. Choosing a coupling with suitable materials and design can improve heat dissipation.

• Continuous vs. Intermittent Operation:

  Servo couplings may have different thermal limits for continuous operation compared to intermittent or start-stop operations. It is essential to ensure that the coupling’s temperature ratings are suitable for the application’s specific mode of operation.

• Environment:

  The operating environment can also impact the thermal performance of the servo coupling. High ambient temperatures, confined spaces, or inadequate ventilation can elevate the temperature around the coupling, potentially pushing it beyond its limits.

• Lubrication:

  Proper lubrication of the coupling’s components can help reduce friction and heat generation. Using the right lubricant and ensuring regular maintenance can contribute to the coupling’s optimal thermal performance.

• Thermal Expansion:

  Thermal expansion of materials can lead to dimensional changes in the coupling. If not accounted for, this expansion can cause misalignment or interference with other components. Understanding the thermal expansion properties of the coupling materials is crucial for precise system design.

• Overheating Prevention:

  To prevent overheating, monitoring the coupling’s temperature during continuous operations is advisable. Implementing temperature sensors or thermal monitoring systems can help detect abnormal temperature increases and trigger appropriate actions, such as reducing operating speeds or shutting down the system temporarily.

• Material Selection:

  Choosing materials with appropriate thermal properties is vital for withstanding continuous operations. Some materials are more resistant to high temperatures and thermal cycling, making them suitable for applications with demanding thermal conditions.

By considering these thermal considerations and adhering to the specified temperature limits, users can ensure that servo couplings operate reliably and efficiently during continuous operations, avoiding potential failures and ensuring the longevity of the motion control system.

Effect of Misalignment on the Performance of Servo Couplings and How to Address It

Misalignment is a critical factor that can significantly impact the performance of servo couplings. Here’s how it affects the coupling and the measures to address it:

• Reduced Torque Transmission: Misalignment causes angular, axial, or parallel offsets between the motor and the driven load. As a result, the coupling may not transmit the full torque efficiently, leading to power loss and reduced system performance.
• Increased Wear and Fatigue: Misalignment subjects the servo coupling to additional stress, leading to accelerated wear and fatigue. Over time, this can cause premature failure of the coupling and other components in the system.
• Increased Vibration and Noise: Misalignment results in uneven load distribution and can lead to increased vibrations and noise during operation. Excessive vibrations can affect the overall stability and accuracy of the motion control system.
• Overheating: Misalignment can induce friction between the coupling and its mating components, leading to increased heat generation. This can result in overheating and potentially damage the coupling or nearby components.
• Loss of Positional Accuracy: In precision motion control applications, misalignment can lead to a loss of positional accuracy and repeatability. The driven load may not reach the desired position precisely, affecting the overall performance of the system.
• Addressing Misalignment: Proper alignment is crucial to maintaining the performance and longevity of the servo coupling. Here are the steps to address misalignment:

1. Use Precision Couplings: Select servo couplings designed to accommodate misalignment while maintaining high precision and torque transmission capabilities. Flexible couplings, such as bellows or beam couplings, are often used to address misalignment.
2. Check Alignment Regularly: Perform periodic checks to verify the alignment between the motor and the driven load. Use alignment tools and techniques to correct any misalignment within acceptable tolerances.
3. Use Coupling Guards: Coupling guards can protect the servo coupling from external forces or impacts that could cause misalignment. They help maintain the coupling’s proper orientation and prevent damage.
4. Follow Installation Guidelines: Adhere to the manufacturer’s installation guidelines and recommendations for mounting and aligning the servo coupling. Improper installation can lead to misalignment issues.
5. Maintenance and Lubrication: Regularly maintain and lubricate the servo coupling as per the manufacturer’s instructions. Proper lubrication can help reduce friction and wear, mitigating the effects of misalignment.
6. Dynamic Balancing: If the application involves high speeds, consider using servo couplings that are dynamically balanced to minimize the effects of rotational imbalance and potential misalignment.

By addressing misalignment effectively, the performance, efficiency, and service life of servo couplings can be optimized, contributing to the overall success of motion control systems.

Advantages of Using Zero-Backlash Servo Couplings in Precision Systems

Zero-backlash servo couplings offer significant benefits in precision motion control systems where accuracy, repeatability, and reliability are essential. Here are the advantages of using zero-backlash servo couplings:

• Precise Motion Control: Zero-backlash couplings have no play or clearance between the coupling components. This lack of backlash ensures that motion is accurately transmitted from the servo motor to the driven load without any lost motion. As a result, precision systems can achieve precise positioning and smooth motion profiles.
• Elimination of Positioning Errors: Backlash in couplings can lead to positioning errors, especially in applications where motion direction changes frequently. Zero-backlash couplings prevent any shift or lag in motion, resulting in accurate and repeatable positioning of the driven load.
• High Repeatability: With zero-backlash, the coupling maintains consistent positioning during bidirectional movements. This feature enhances repeatability, which is crucial in tasks that require the system to follow the same path repeatedly with minimal deviation.
• Improved System Stability: Backlash in couplings can cause vibration and instability in precision systems. Zero-backlash couplings dampen vibrations and ensure a more stable motion, which is particularly valuable in high-speed and high-precision applications.
• Long-Term Reliability: Zero-backlash couplings reduce wear and stress on the servo motor and driven load’s bearings and components. This reduction in wear increases the lifespan of the entire system and reduces the need for frequent maintenance and replacement.
• Responsive Dynamic Performance: Zero-backlash couplings provide instantaneous response to changes in motion direction and speed. This responsiveness is critical in applications that require rapid acceleration and deceleration, enabling the system to handle dynamic loads with precision and efficiency.
• Higher Torque Transmission: Zero-backlash couplings can handle higher torque loads compared to some flexible couplings with backlash. This capability allows the system to transmit greater forces without compromising motion accuracy.
• Enhanced Efficiency: By minimizing lost motion and ensuring precise power transmission, zero-backlash couplings contribute to overall system efficiency. They reduce energy losses and optimize the utilization of the servo motor’s output power.
• Compatibility with High-Precision Components: In precision systems that incorporate high-precision components like encoders and linear scales, zero-backlash couplings are essential to maintain the accuracy of these components’ measurements and feedback.

In summary, zero-backlash servo couplings play a critical role in precision motion control systems by providing accurate, repeatable, and stable motion. Their ability to eliminate backlash and minimize positioning errors enhances overall system performance, efficiency, and reliability, making them an ideal choice for demanding applications that require the utmost precision.

editor by CX 2024-03-14