Product Description
Densen customized yoxiiz fluid coupling,fluid coupling oil,centrifugal fluid coupling
Product Name | Fluid coupling,constant fluid coupling,fluid coupling yox |
DN mm | 16~190mm |
Rated Torque | 40~25000 N·m |
Allowable speed | 4500~200 kN·m |
Material | 45#steel |
Application | Widely used in metallurgy, mining, engineering and other fields. |
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Equipment
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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Are there specific torque and speed limits for different fluid drive coupling designs?
Yes, different fluid drive coupling designs have specific torque and speed limits that determine their suitable applications and performance capabilities. These limits are influenced by the coupling’s design, construction, and the type of hydraulic fluid used. Here are the key factors that contribute to torque and speed limits in fluid drive couplings:
- Coupling Size and Design: The physical size and design of the fluid drive coupling play a significant role in determining its torque capacity. Larger couplings with robust construction can generally handle higher torque loads than smaller couplings.
- Hydraulic Fluid Type: The type and viscosity of the hydraulic fluid used in the coupling affect its torque transmission capabilities. Different fluid types may have varying coefficients of friction, which impact the torque capacity of the coupling.
- Fluid Fill Level: The amount of hydraulic fluid filled in the coupling can influence its torque capacity. Proper fluid fill levels are essential for optimal coupling performance and torque transmission.
- Speed Range: The speed range of a fluid drive coupling is determined by its design and the hydraulic fluid’s properties. Some couplings may have limitations at high rotational speeds due to centrifugal forces and fluid dynamics.
- Operating Temperature: The operating temperature of the fluid drive coupling affects the hydraulic fluid’s viscosity, which in turn impacts the coupling’s torque transmission efficiency and overall performance.
- Application Specifics: The specific application requirements, such as load variations, start-up conditions, and duty cycles, also influence the torque and speed limits of the fluid drive coupling.
Manufacturers provide torque and speed ratings in their coupling specifications to guide users in selecting the appropriate coupling for a particular application. These ratings indicate the maximum torque and rotational speed that the coupling can handle safely and effectively without risking damage or performance issues.
It is essential to carefully match the torque and speed requirements of the power transmission system with the fluid drive coupling’s torque and speed limits. Operating the coupling within its specified limits ensures optimal performance, extended service life, and enhanced safety of the power transmission system.
If the application demands higher torque or speed capabilities than a standard fluid drive coupling can provide, it is advisable to consult with coupling manufacturers or fluid power engineers to explore custom-designed or specialized couplings that can meet the specific requirements.
Real-World Examples of Successful Fluid Drive Coupling Installations and Their Benefits
Fluid drive couplings, also known as hydraulic couplings or fluid couplings, have been widely used in various industrial applications to achieve numerous benefits. Here are some real-world examples of successful fluid drive coupling installations and the advantages they offer:
- Mining Industry:
In large mining operations, fluid drive couplings are commonly used in conveyor belt systems to control the starting and stopping of the belts. The fluid coupling provides smooth and gradual acceleration, reducing shock loads on the conveyor system and minimizing wear and tear on the belts and other components. This results in increased equipment lifespan and reduced maintenance costs. Additionally, the fluid coupling offers overload protection, preventing damage to the conveyor system in case of sudden overloads or blockages.
- Steel Industry:
In steel mills, fluid drive couplings are utilized in various applications, such as rolling mills and large fans. In rolling mills, fluid couplings help maintain a constant speed during rolling operations, ensuring consistent product quality. The fluid coupling’s ability to absorb shock loads and torsional vibrations protects the rolling mill equipment and reduces downtime. In cooling and ventilation fans, fluid couplings provide soft starts and smooth speed control, leading to energy savings and quieter operation.
- Power Generation:
In power plants, fluid drive couplings are commonly used in steam turbines and gas turbines. Fluid couplings allow for controlled acceleration of the turbines, reducing the mechanical stress on the blades and rotor during startup. This results in extended turbine life and improved reliability. Additionally, fluid couplings help improve grid stability by enabling gradual synchronization with the power grid during startup.
- Marine Industry:
In marine propulsion systems, fluid drive couplings are employed to connect diesel engines to propellers. The fluid coupling ensures smooth torque transmission and absorbs torsional vibrations, preventing damage to the propulsion system and increasing the lifespan of the engine and gearbox. Additionally, the fluid coupling offers overload protection, safeguarding the engine and drivetrain from sudden load changes.
- Pumping Applications:
In water and wastewater treatment plants, fluid drive couplings are commonly used in pump applications. The fluid coupling enables soft starts, reducing the impact on the pump and electrical system during startup. This results in energy savings and extended pump life. Additionally, the fluid coupling’s ability to dampen torsional vibrations minimizes wear on pump bearings and mechanical seals.
These real-world examples illustrate the versatility and effectiveness of fluid drive couplings in various industries. Whether in mining, steel production, power generation, marine propulsion, or pumping applications, fluid couplings provide reliable and efficient power transmission while offering benefits such as reduced maintenance, energy savings, increased equipment lifespan, and improved system reliability.
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What is a fluid drive coupling, and how does it function in mechanical power transmission?
A fluid drive coupling, also known as a hydraulic coupling, is a mechanical device used to transmit power between two shafts in a machinery system. It operates on the principle of hydrodynamic power transmission, utilizing hydraulic fluid to transfer torque and rotational motion from the driving shaft to the driven shaft.
The basic construction of a fluid drive coupling consists of two primary components: a driving impeller (pump) and a driven impeller (turbine), both housed within a sealed casing. The casing is filled with hydraulic fluid, typically oil. When the driving impeller is activated, it starts rotating, creating a flow of hydraulic fluid within the casing. This fluid movement generates a hydraulic force that drives the driven impeller to rotate at the same speed as the driving impeller.
The key features of how a fluid drive coupling functions in mechanical power transmission are as follows:
- No Mechanical Contact: Fluid drive couplings are non-contact power transmission devices. There is no direct mechanical connection between the driving and driven shafts. Instead, they rely on the hydraulic fluid to transfer power.
- Torque Amplification: Fluid drive couplings can provide torque amplification during startup or when the driven shaft experiences resistance. As the driving impeller starts rotating, the hydraulic fluid movement gradually accelerates the driven impeller, effectively increasing the torque applied to the driven shaft.
- Smooth Operation: Due to the hydrodynamic nature of power transmission, fluid drive couplings offer smooth and gradual acceleration, reducing shock loads on the machinery and minimizing wear on mechanical components.
- Slip Control: In certain applications, fluid drive couplings allow controlled slippage between the driving and driven shafts. This feature can protect the machinery from sudden overloads and act as a safety mechanism during transient operations.
- Speed Regulation: Fluid drive couplings can regulate the speed of the driven shaft by adjusting the input speed of the driving shaft. This speed regulation can be useful in applications where precise control of output speed is required.
- Overload Protection: In cases of excessive load or torque, fluid drive couplings can slip, absorbing the excess energy and protecting the machinery from damage.
Fluid drive couplings find applications in various industries, including automotive, industrial machinery, mining, and marine. They are commonly used in applications where smooth power transmission, torque amplification, and overload protection are crucial.
It’s essential to consider the specific requirements of the machinery system and the torque and speed characteristics when selecting a fluid drive coupling. Proper maintenance and monitoring of hydraulic fluid levels and condition are necessary to ensure optimal performance and longevity of the fluid drive coupling in mechanical power transmission.
editor by CX 2024-04-13