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YOX Load Limiting Type Hydraulic / Fluid Coupling

Hydraulic coupling, also known as hydraulic coupling, is a widely used universal hydraulic transmission component. It is placed in motion power is transmitted between the power machine and the working machine. A typical limited moment hydraulic coupling structure consists of symmetrically arranged impellers composed of shell, turbine, rear auxiliary chamber, main shaft and other components. The casing and pump impeller are fixedly connected by bolts, and their function is to prevent the overflow of working fluid. The active part includes the active half coupling, elastic block, driven half coupling, pump wheel, and shell. The driven part includes the main shaft and turbine. The active part is connected to the power machine, and the passive part is connected to the working machine.

The pump impeller and turbine are both impellers with radial blades. The annular space formed by the concave cavity of the pump wheel and turbine wheel，the cavity is called the working cavity, which allows the working fluid to circulate and flow in it, transmitting power for work.

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.