Time : 2023-12-25 Browse : 14
Fluid couplings can reduce motor installed capacity during use, thereby achieving energy savings. This is specifically reflected in the following aspects:
Hydrodynamic couplings possess the performance of mitigating impacts and isolating torsional vibrations. They allow motors to have a delay time during startup, enabling slow acceleration and reducing mutual impacts between components caused by sudden startup. Since the pump impeller torque of hydrodynamic couplings is proportional to the square of the rotational speed, the pump impeller torque is extremely small at the moment of startup due to low speed, making the motor start approximately with the pump impeller of the hydrodynamic coupling under no-load conditions. Therefore, hydrodynamic couplings feature short startup time, small and stable current, and are particularly suitable for starting large-inertia heavy loads.
Meanwhile, turbo couplings have no direct mechanical connection. When the external load exceeds the limit, the pump impeller torque of turbo couplings stops rising, the motor continues to rotate, and the output of turbo couplings decelerates until it stops. This continues until the fusible plug of the turbo coupling sprays fluid to cut off input and output, protecting the motor and working machine, reducing machine failure rates, lowering maintenance costs and downtime, and extending equipment service life.
In terms of energy saving, fluid drive couplings have significant effects:
Hydraulic couplings reduce motor installed capacity: Hydraulic couplings effectively solve motor startup issues and the "big horse pulling a small cart" phenomenon. Compared with rigid transmission, they can reduce the motor frame size by at least one level. They reduce startup current and its duration, minimize impact on the power grid, which is particularly evident when starting large-inertia heavy loads.
Fluid couplings save energy during startup: Fluid couplings solve startup difficulties by enabling motors to start approximately under no-load conditions, resulting in low startup current with short duration and minimal impact on the power grid. The larger the moment of inertia of the working machine, the longer the startup time, and the more frequent the startups, the more prominent the energy-saving effect of using fluid coupling transmission, as they reduce energy consumption during startup.
Turbo couplings save energy through sequential startup: In multi-motor drives, turbo couplings allow motors to start sequentially and balance loads, reducing startup current, lowering impact on the power grid and transformer load, ensuring uniform output from each motor, and achieving energy savings.
Fluid drive couplings save energy through overload protection: Fluid drive couplings protect motors and working machines from damage during overload, preventing motors from enduring excessive impact due to overload, reducing equipment failure rates, extending service life, and indirectly achieving energy savings.
