How a Hydraulic Tensioner Works |
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The hydraulic system is mainly used on applications with high loads
and/or angular vibrations, where a mechanical automatic tensioner
cannot provide sufficient damping or tensioner movement. In
general, the hydraulic tensioner units need more engine space. A hydraulic tensioner system consists of a hydraulic actuator in combination with a tensioner pulley. The movement of the piston rod of the actuator is transmitted to the tensioner pulley via an integrated or separate lever (Figure 2). The hydraulic actuator works like a suspension strut, where a spring in combination with the damping feature of the oil, will keep the wheel in contact with the road. In this case, the hydraulic actuator controls the dynamic belt forces, while it also maintains a +/- constant belt tension, and compensates for length hanges due to thermal expansion. |
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A hydraulic actuator typically consists of the following parts (Figure 3): housing (cylinder), piston rod, piston, oil, air, spring, one way valve and retaining pin. |
Here are some main points to consider when dealing with hydraulic tensioners: Storage: Installation: Advantages: Why Replace? |