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YOX Load Limiting Type (1).jpg
YOX Load Limiting Type (2).jpg

China YOX Hydraulic Fluid Coupling - Reliable Suppliers and Factory for Load Limiting Transmission Solutions

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Hydraulic couplings, also referred to as hydraulic couplings, are essential components in hydraulic transmission systems, widely used in various applications. These components serve as a bridge for motion power transfer between power machines and working machines. A typical hydraulic coupling features a well-designed structure with symmetrically arranged impellers, including the shell, turbine, rear auxiliary chamber, main shaft, and other integral parts. The casing and pump impeller are securely bolted together, preventing any overflow of working fluid. The active components consist of the active half coupling, elastic block, driven half coupling, pump wheel, and shell, while the driven components include the main shaft and turbine. The active part connects to the power machine, whereas the passive part links to the working machine.

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Both the pump impeller and turbine feature radial blades that enhance performance. The annular space created between the concave cavity of the pump wheel and turbine wheel is known as the working cavity. This unique design allows the working fluid to circulate and flow freely, effectively transmitting power for various tasks. As a leading manufacturer and supplier in China, our factory is committed to providing high-quality hydraulic couplings that meet industry standards and customer expectations.

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    Product Details

    Product Features

    1) It has the functions of reducing startup shock and isolating torsional vibration.
    2) It has the overload protection function.
    3) It has the power-saving function.
    4) It has the function of slow startup with load delay.
    5) It has the function of coordinating multi-machine drive.
    6) It has the characteristics of extending the service life of the motor and the working machine and saving maintenance costs.
    7) It has the feature of a simple and reliable structure, no special maintenance required, and a long service life.

    Product Maintenance

    1
    The hydraulic coupling operates in the same manner as the motor. It can rotate in either direction, but it is not suitable for rapid and frequent reversing.
    2
    After installation, during the first power-on test run, it is necessary to check whether the coupling operates smoothly, without vibration, and without abnormal noise.
    3
    To ensure safe production, a mesh-shaped heat dissipation protective cover should be installed on the coupling.
    4
    When the prime mover reaches the rated speed, it must start to operate; otherwise, it is necessary to check if there is any jamming in the load. At this time, the machine should be stopped immediately for inspection to identify the cause.
    5
    During operation or shutdown, there must be no leakage from the coupling.
    6
    During continuous operation, the working oil temperature of the coupling should not exceed 90°C; 70°C is preferable.
    7
    After the first 300 hours of operation of the coupling, the working oil should be drained and replaced with new oil (if the crude oil is not deteriorated and filtered, it can be reused). After 3000 hours of operation, the quality of the working oil should be inspected. If the oil quality deteriorates, new oil should be used.
    8
    Regularly check the wear condition of the elastic blocks. If necessary, replace them. If the elastic block is damaged within a short period of time, it is mostly caused by incorrect installation and alignment. Realign it, and if necessary, use a dial indicator to measure and align.
    9
    The fusible plug must not be blocked and cannot be replaced with other items that do not have overheating protection function. When the fusible plug melts, the cause of the oil spraying must be found and the fault eliminated. Reinject the working oil at the specified filling volume, replace the fusible plug with the same specification, or pour in low-melting-point alloy. At the same time, recheck and tighten all the bolts on the coupling circumference.
    10
    Regularly check the installation accuracy of the prime mover shaft and the input shaft of the working machine, and correct it. Do not randomly disassemble the coupling to avoid damaging the seal and balance. Even if disassembled, mark the joints of each component.

    Detail Pictures

    YOX Load Limiting Type (2)
    YOX Load Limiting Type (1)

    Frequently Asked Questions

    What is the optimal operating oil temperature for the hydraulic coupling?
    During continuous operation, the working oil temperature should not exceed 90°C, with 70°C being the preferable operating temperature.
    How often should the working oil be replaced or inspected?
    The working oil should be drained and replaced after the initial 300 hours of operation. After 3000 operating hours, the oil quality should be inspected and replaced if deterioration occurs.
    Can the hydraulic coupling operate in both directions?
    Yes, it operates in the same manner as the motor and can rotate in either direction, though it is not suitable for rapid and frequent reversing.
    What should be done if the fusible plug melts?
    Identify and eliminate the cause of oil spraying, reinject working oil to the specified volume, replace the fusible plug with an identical specification (or pour low-melting-point alloy), and re-tighten all perimeter bolts.
    What causes premature damage to the elastic blocks?
    Premature elastic block damage is usually caused by incorrect installation and shaft misalignment. Realign the shafts using a dial indicator if necessary.
    What safety protection should be installed on the coupling?
    A mesh-shaped heat dissipation protective cover must be installed over the coupling to ensure operational safety and proper heat management.

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