Product Description

TVA Series Constant Torque Hydraulic Fluid Coupling


It is a hydraulic component of transmission of a kind of power type to the hydraulic coincidence machine of square type. Because its efficiency is high, the structure is simple, can drive load to start steadily , Improve performance of starting, improve kinetic energy strength, have protect function, can isolate sprain shaking and assault, The load of balanced every electrical machinery in many drives chain of electrical machinery, And reduce the impact electric current of the electric netting, So used widely in some aspect, such as mining machinery, chemical industry, metallurgical industry, food, architecture, traffic,etc…

The characteristic and operation principle:

There are YOX type and TVA type 2 series in limit hydraulic coincidence machine of square type in our factory produces, YOX type is formed from initiative and passive parts mainly. The initiative ones include complement, front half is connected with the axle, latter half is connected with the axle, elasticity block,pump wheels and outer cover. passive parts Include the axle and turbine mainly The initiative link with former motives and some passive parts link with working machine.

The structure of TVA type is the same as YOX type basically, but the airtight pattern is adopted outside airtight, Have increased the structure of dismantling and putting.

The torsion of the original motive is transmitted by the job liquid in the coincidence machine. Pump change the kinetic energies into liquid mechanical energies . Turbine turn the kinetic energy of the liquid into the mechanical energy. The axle drives load through exporting. There is not mechanical connection between the wheel of pump and turbine.

Our products range:

+YOTCGP series Variable speed fluid coupling
+YOTCG series Variable speed fluid coupling
+YOTCHP series Variable speed fluid coupling
+YOTCHZ series Variable speed fluid coupling
+YOTCQ series Variable speed fluid coupling
+YOTCHF series Variable speed fluid coupling
+Constant fluid coupling, such YOX, TVA series.

Sample Product Photos:

Production Equipment Photos:

Mainly Cooperation Customer:

Raw material yard, ore beneficiation, sinter plant and pellet, coke oven plant, iron making plant, steel making plant.

Successful Projects Feedback:

Note: We also accept the repair work projects, and provide spare parts for variable speed fluid coupling. 
If you have any related projects need our proposal, feel free to contact us.


fluid coupling

Role of Fluid Couplings in Heavy-Duty Mining Equipment

Fluid couplings play a critical role in heavy-duty mining equipment, offering several advantages that enhance the performance, safety, and longevity of the machinery:

  • Soft Start: In mining applications, where large equipment like crushers, conveyors, and draglines are involved, fluid couplings provide a soft start to the motor, gradually ramping up the torque and reducing the shock and stress on the drivetrain. This ensures smoother equipment startup and prevents sudden power demand spikes.
  • Torque Limiting: Fluid couplings act as torque limiters, protecting the equipment from sudden overloads and torque surges during operations. This feature prevents damage to the motor, gearbox, and driven components, thus increasing the reliability and lifespan of the equipment.
  • Load Distribution: In mining equipment with multiple driven components or motors, fluid couplings enable efficient load distribution among the components. This ensures that each component shares the load appropriately, preventing uneven wear and improving overall system efficiency.
  • Overload Protection: The inherent slip feature of fluid couplings allows them to slip at high loads, providing overload protection to the equipment. In case of unexpected jams or blockages in conveyor belts or crushers, the fluid coupling can slip, preventing costly damage to the equipment.
  • Vibration Damping: Mining operations can generate significant vibrations that can be damaging to the equipment. Fluid couplings help dampen vibrations, reducing stress on the components and minimizing wear and tear.
  • Reduced Maintenance: By preventing sudden torque surges and overloads, fluid couplings reduce the need for frequent maintenance and repairs, saving both time and money for mining operators.

Heavy-duty mining equipment operates in harsh and challenging environments with high loads and abrasive materials. Fluid couplings used in mining applications are designed to be robust, durable, and resistant to contaminants like dust and water.

Overall, fluid couplings play a vital role in ensuring the efficient and reliable operation of heavy-duty mining equipment, contributing to increased productivity and reduced downtime in mining operations.

fluid coupling

Role of Fluid Coupling in Torque Multiplication and Power Transfer

A fluid coupling is a mechanical device used to transmit power between two shafts without direct physical contact. It operates on the principles of fluid dynamics and hydrokinetics to enable torque multiplication and efficient power transfer. Here’s how a fluid coupling achieves these functions:

  • Hydrodynamic Torque Converter: A fluid coupling is essentially a hydrodynamic torque converter. When the input shaft (driving shaft) rotates, it sets the transmission fluid inside the coupling in motion. The fluid experiences centrifugal forces, creating a high-velocity zone near the outer circumference and a low-velocity zone near the center. This velocity difference generates torque in the fluid coupling, allowing power to be transmitted from the input shaft to the output shaft (driven shaft).
  • Torque Multiplication: One of the primary advantages of a fluid coupling is its ability to provide torque multiplication. During startup or when the load on the driven shaft is initially low, the fluid coupling slips to some extent, which allows the input shaft to rotate at a higher speed than the output shaft. This speed difference results in torque multiplication, enabling the fluid coupling to handle higher loads during acceleration or heavy starting conditions.
  • Power Transfer Efficiency: Fluid couplings offer high power transfer efficiency due to the hydrodynamic nature of their operation. The smooth and continuous transmission of power through the fluid medium minimizes energy losses and mechanical wear, leading to more efficient power transmission compared to mechanical clutches or direct-coupling methods.
  • Load Adaptability: Fluid couplings automatically adjust their slip to adapt to changing load conditions. When the load on the output shaft increases, the fluid coupling slips more, allowing the output shaft to slow down slightly and match the load demand. This load adaptability ensures smooth and stable power transfer even under varying operating conditions.

Fluid couplings are commonly used in applications where torque multiplication and smooth power transfer are essential. They find widespread use in heavy machinery, mining equipment, conveyors, crushers, marine propulsion systems, and many other industrial applications. By efficiently transferring power while providing torque multiplication, fluid couplings help optimize the performance and longevity of power transmission systems.

Proper selection of the fluid coupling based on the application’s torque and power requirements is crucial to ensure optimal torque multiplication and power transfer. Additionally, regular maintenance and monitoring of the fluid coupling’s condition are essential to maintain its efficiency and reliability over time.

fluid coupling

Fluid Couplings and Energy Efficiency in Power Transmission

Fluid couplings play a significant role in improving energy efficiency in power transmission systems. They achieve this by enabling smooth and efficient torque transmission while reducing energy losses during various operating conditions.

One of the key factors contributing to the energy efficiency of fluid couplings is their hydrodynamic principle of operation. When power is transmitted through a fluid coupling, it operates on the principle of hydrodynamic power transmission. The primary component, known as the impeller, rotates and imparts motion to the fluid inside the coupling. This motion creates a hydrodynamic force that transmits the torque to the output side.

During the initial startup or when there is a significant speed difference between the input and output shafts, the fluid coupling allows the input shaft to accelerate gradually. This feature, known as the soft start, reduces the mechanical stress on the connected components and the power source. By avoiding sudden acceleration, fluid couplings minimize the energy spikes that occur during direct starts in systems without couplings.

Moreover, fluid couplings act as a torque limiter when the load exceeds a certain threshold. This characteristic, known as the slip, allows the fluid coupling to disengage slightly when the torque reaches a predetermined level. As a result, it protects the system from overloads and reduces energy wastage during high-stress conditions.

Additionally, fluid couplings help mitigate the impact of shock loads and torsional vibrations, which can reduce wear and tear on mechanical components. By minimizing vibrations and shock loads, fluid couplings contribute to longer equipment life and, consequently, lower maintenance and replacement costs.

However, it’s important to note that like any mechanical component, fluid couplings have some energy losses due to viscous drag and heat dissipation. While modern fluid couplings are designed with improved efficiency, these losses need to be considered when assessing the overall energy efficiency of a power transmission system.

In summary, fluid couplings enhance energy efficiency in power transmission by providing soft starts, torque limiting, and damping of vibrations, thus reducing energy wastage and extending the life of the connected equipment.

China wholesaler Tva Series Constant Torque Hydraulic Fluid Coupling  China wholesaler Tva Series Constant Torque Hydraulic Fluid Coupling
editor by CX 2023-10-21