YOX560 Hydraulic Coupling, Limiting Torque Type Hydraulic Coupling, Specialized Manufacturer of Hydraulic Couplings for Belt Conveyors

Product Introduction

A hydraulic coupler is a mechanical device that uses a liquid medium to transmit rotational speed. It connects the driving input shaft to the original driving mechanism and the driven output shaft to the load shaft. By adjusting the pressure of the liquid medium, the rotational speed of the output shaft can be altered. In an ideal state, as the pressure approaches infinity, the output speed equals the input speed, akin to a rigid coupling. When the pressure decreases, the output speed correspondingly reduces. By continuously changing the medium pressure, the output speed can be adjusted continuously to be lower than the input speed. The principle of power control and speed regulation, as well as the efficiency of the hydraulic coupler, is based on the aforementioned characteristics. A hydraulic coupler is a power-consuming mechanical speed regulation 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 less loss power. However, the output power decreases with the cube of the speed, and the speed regulation efficiency is still very low. The speed regulation efficiency curve of the hydraulic coupler shows an average efficiency of around 50%. A non-rigid coupling that uses a liquid as the working medium, also known as a hydraulic coupling.

Product Actual Photos

Product Features

The pump wheel and turbine of a hydraulic coupler form a sealed working chamber that allows for the cyclic flow of liquid. The pump wheel is mounted on the input shaft, and the turbine is mounted on the output shaft. When the prime mover (such as an internal combustion engine or electric motor) drives the input shaft to rotate, the liquid is ejected by the centrifugal pump wheel. This high-speed liquid enters the turbine, where it rotates, transferring the energy obtained from the pump wheel to the output shaft. The liquid then returns to the pump wheel, creating a continuous cycle. The hydraulic coupler transmits torque by the change in momentum moment resulting from the interaction between the liquid and the blades of the pump wheel and turbine. Its output torque is equal to the input torque minus the frictional torque, hence it is always less than the input torque. The input and output shafts of the hydraulic coupler are connected by the liquid, with no rigid connection between the working components. The hydraulic coupler's features include: it can eliminate shock and vibration; the output speed is lower than the input speed, and the speed difference between the two shafts increases with the load; it has good overload protection and starting performance; when the load is too heavy and the rotation stops, the input shaft can still rotate, preventing damage to the prime mover; 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 output shaft speed multiplied by the output torque (output power) to the input shaft speed multiplied by the 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 of the hydraulic coupler is drained, it is disengaged, functioning as a clutch.