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Constant Filling Fluid Coupling

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Fusible Plug Of Hydraulic Coupling

Fusible Plug Of Hydraulic Coupling

Hydraulic coupling fusible plug type is a fusion of safety relief devices, it is a short steel tubular plug, middle perfusion with fusible alloy, with the plug out of threaded pipe connection with the container. The liquid-force coupler is a "molten" (" temperature ") safety...

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Hydraulic coupling fusible plug type is a fusion of safety relief devices, it is a short steel tubular plug, middle perfusion with fusible alloy, with the plug out of threaded pipe connection with the container.

The liquid-force coupler is a "molten" (" temperature ") safety discharge device, which depends on the temperature of the wall of the container.When the container accidentally heats up and the temperature rises, the fusible alloy is melted and the gas in the device is released from the hole in the plug that is filled with a fusible alloy.However, the safety relief device is only applicable to the pressure of the gas in the device.

Hydraulic coupling fusible plug standard normal temperature T = 125 ℃ + / - 5 ℃. The frequent start or heavy large inertia load start condition for a longer time, can choose 140 ℃ or 160 ℃ of fusible alloy, but may affect the service life of shortening the skeleton oil seal, under the condition of mechanical overload or overload, coupling pump wheel and turbine slip increases, power loss is and converted into heat energy (working liquid in hydraulic coupling temperature).There is one or more fusible plug for the moment type hydraulic coupling.The wick of the fusible plug has a low melting point alloy which melts at a certain temperature (120-140-160).After that, the fluid ejection, the transmission of power will be cut off.Therefore, it is necessary to carefully consider the factors in the selection of fusible plugs.

Prevention of hydraulic coupling can be damaged during use. The following points should be paid attention to:

1. Oil charge is too little, and oil should be filled according to the requirement.

2. Leakage of the coupling device. Check whether the joint surface and axial end are leaking, and replace the seal.

3. Generate overload, check power consumption on schedule and eliminate overload.

4. The working machine has the braking phenomenon, the maintenance work machine is on schedule, and the brake failure is excluded.

5. Start frequently, not too frequently.

6. The starting time is too long. Check the power consumption.

7. The coupling device is too small to replace the proper coupling.


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