Zibo YOX450 Hydraulic Coupling_ Torque Limiter Type Hydraulic Coupling_ Ready Stock for Cement Plant

Product Introduction

A hydraulic coupling is a mechanical device that transmits rotational speed using a liquid medium. Its driven input shaft is connected to the original driving motor, while the driven output shaft is connected to the load shaft. By adjusting the pressure of the liquid medium, the rotational speed of the output shaft can be changed. Ideally, as the pressure approaches infinity, the output speed equals the input speed, equivalent to a rigid coupling. As pressure decreases, the output speed correspondingly drops. Continuously altering the medium pressure allows for a stepless adjustment of the output speed below the input speed. The power control and speed regulation principle and efficiency of the hydraulic coupling are based on the aforementioned characteristics. The hydraulic coupler is a power-consuming type of mechanical speed regulating device; the deeper the speed regulation (the lower the speed), the greater the loss, especially for constant torque loads. Since the original driving input power remains unchanged, the loss power increases proportionally with the speed loss. For loads like fans and pumps, as the load torque varies with the square of the speed, the original driving input power decreases with the square of the speed, resulting in relatively lower loss power. However, the output power decreases with the cube of the speed, and the speed regulation efficiency remains low. The hydraulic coupling's speed regulation efficiency curve has an average efficiency of around 50%. A non-rigid coupling that uses liquid as the working medium, also known as a hydraulic coupling.

Product Real Photos

Product Features

The pump wheel and turbine of a hydraulic coupler form a sealed working chamber that allows for the circulation of liquid. The pump wheel is mounted on the input shaft, while the turbine is mounted on the output shaft. As the power source (such as an internal combustion engine or electric motor) rotates the input shaft, the liquid is ejected by the centrifugal pump wheel. This high-speed liquid, upon entering the turbine, drives it to rotate, transferring the energy obtained from the pump wheel to the output shaft. The liquid then returns to the pump wheel, creating a continuous flow. The hydraulic coupler transmits torque by the change in momentum caused by the interaction of the liquid with the blades of the pump wheel and turbine. Its output torque is equal to the input torque minus the friction torque, thus its output torque is always less than the input torque. The input and output shafts of the hydraulic coupler are connected by the liquid, with no rigid connections between the working components. The characteristics of the hydraulic coupler include: the ability to eliminate shocks and vibrations; output speed lower than input speed, with the speed difference between the two shafts increasing with the load; good overload protection and starting performance, allowing the input shaft to continue rotating even when the load is too high and the engine stops, thus preventing damage to the power source; as the load decreases, the output shaft speed increases until it approaches the input shaft speed. The transmission efficiency of the hydraulic coupler is equal to the ratio of the product of output shaft speed and output torque (output power) to the product of input shaft speed and input torque (input power). Generally, a hydraulic coupler can achieve higher efficiency when the normal operating speed ratio is above 0.95. The characteristics of the hydraulic coupler vary due to the different shapes of the working chamber and the pump wheel and turbine. If the oil in the hydraulic coupler is drained, the coupler is disengaged, serving as a clutch.