Product Description
Densen customized l type jaw couplings,rotex jaw coupling,curved jaw coupling
| Product Name | Densen customized l type jaw couplings,rotex jaw coupling,curved jaw coupling |
| 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. |
Densen customized crane coupling,crawler crane coupling,shaft coupling for machine
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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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Differences between Elastomer and Metallic Jaw Coupling Designs
Jaw couplings are available in two primary designs: elastomer jaw couplings and metallic jaw couplings. Each design has its own set of characteristics and advantages:
- Elastomer Jaw Couplings: Elastomer jaw couplings, also known as flexible jaw couplings, feature an elastomeric spider element that sits between the two hubs. This spider element is typically made of materials like polyurethane, rubber, or other flexible polymers. The elastomeric material provides the coupling with flexibility, allowing it to compensate for shaft misalignment, angular, parallel, and axial, as well as dampen vibrations and shocks. Elastomer jaw couplings are popular for their ability to protect connected equipment from mechanical stresses and enhance overall system performance. They are commonly used in applications where some misalignment is expected or in systems with shock loads and vibrations. Additionally, elastomer jaw couplings are known for their relatively lower cost compared to metallic designs.
- Metallic Jaw Couplings: Metallic jaw couplings, also known as rigid jaw couplings, are constructed entirely from metal, usually steel or aluminum. Unlike elastomer couplings, metallic jaw couplings do not have an elastomeric spider element and offer a more rigid connection between the two hubs. As a result, they are less forgiving of misalignment and do not provide the same level of vibration dampening as elastomer couplings. However, metallic jaw couplings offer higher torque capacity and are better suited for applications where precise shaft alignment is critical. They are commonly used in systems that require high torque transmission and minimal torsional flexibility. Additionally, metallic jaw couplings are well-suited for environments with high temperatures or exposure to chemicals, as they can withstand harsher conditions compared to elastomer designs.
The choice between elastomer and metallic jaw couplings depends on the specific requirements of the application. If flexibility, misalignment compensation, and vibration dampening are crucial, elastomer jaw couplings are preferred. On the other hand, when high torque transmission, precise alignment, and durability in challenging environments are needed, metallic jaw couplings are the better option.
Can jaw couplings be used in marine and automotive applications?
Yes, jaw couplings can be used in both marine and automotive applications, and they have proven to be effective in various scenarios within these industries. Here’s how jaw couplings are utilized in marine and automotive settings:
Marine Applications:
In the marine industry, jaw couplings are commonly used to connect the engine to various components, such as propellers, pumps, generators, and auxiliary equipment. They offer several advantages that make them suitable for marine applications:
- Corrosion Resistance: Marine environments are exposed to saltwater and other corrosive elements. Jaw couplings made from materials such as stainless steel or other corrosion-resistant alloys can withstand these harsh conditions and ensure long-lasting performance.
- Misalignment Compensation: Vessel movement and hull flexing can lead to misalignment between the engine and driven components. Jaw couplings can accommodate both angular and parallel misalignment, ensuring efficient power transmission even in dynamic marine conditions.
- Vibration Damping: The elastomer spider in the jaw coupling absorbs vibrations generated by the engine and other equipment, contributing to smoother operation and reduced wear on the components.
- Compact Design: Space is often limited on boats and ships. Jaw couplings have a compact and lightweight design, making them suitable for applications with space constraints.
Automotive Applications:
In the automotive industry, jaw couplings are used in various applications, including power steering systems, engine-driven accessories, and HVAC blowers. They offer several benefits for automotive applications:
- Misalignment Compensation: Jaw couplings can handle small misalignments that can occur due to engine movements or assembly tolerances, ensuring reliable power transmission and reducing stress on the drivetrain.
- Vibration Damping: The elastomer spider in the jaw coupling dampens engine vibrations, contributing to a smoother and quieter ride for passengers.
- Compact and Lightweight: In modern vehicles, lightweight components are essential for fuel efficiency and overall performance. Jaw couplings’ compact design and low inertia make them suitable for automotive applications.
- Cost-Effectiveness: Jaw couplings are often more cost-effective compared to some other coupling types, making them a popular choice for automotive applications where cost considerations are essential.
In conclusion, jaw couplings are versatile and can be successfully used in marine and automotive applications. Their ability to handle misalignment, dampen vibrations, and provide efficient power transmission makes them reliable components in various dynamic and demanding environments.
Limitations and Disadvantages of Using Jaw Couplings
While jaw couplings offer several advantages, they also have some limitations and disadvantages that should be considered when selecting them for specific applications:
- Angular Misalignment: Jaw couplings are sensitive to angular misalignment, and excessive misalignment can lead to increased wear and reduced service life.
- Radial Misalignment: Similar to angular misalignment, radial misalignment should be kept within acceptable limits to prevent premature wear.
- Temperature Limitations: The operating temperature range of jaw couplings may be limited by the material used. For high-temperature applications, other coupling types may be more suitable.
- Shock Load Absorption: While jaw couplings can handle moderate shock loads, they may not be ideal for applications with severe shock loads, which can lead to increased stress and failure.
- Torsional Stiffness: Jaw couplings have a certain level of torsional stiffness, which means they may not provide the same level of vibration isolation as other coupling types.
- Backlash: Jaw couplings can have some degree of backlash due to their elastomeric element, which may not be desirable in precision positioning applications.
- Speed Limitations: High-speed applications may require careful consideration of the jaw coupling’s design and material selection to avoid issues related to centrifugal forces.
Despite these limitations, jaw couplings remain a popular choice in many applications due to their ease of installation, simple design, and cost-effectiveness. Proper selection, installation, and maintenance can help mitigate some of these limitations and ensure optimal performance and reliability of the jaw coupling.
editor by CX 2024-03-03