In order to meet the needs of different types of machinery for different purposes, hydraulic cylinders have a variety of structures and different properties. According to its hydraulic pressure can be divided into single-acting hydraulic cylinder and double-acting hydraulic cylinder; according to its structural characteristics can be divided into piston hydraulic cylinder, piston hydraulic cylinder, telescopic hydraulic cylinder and swing hydraulic cylinder.
The following double-acting single-piston hydraulic cylinder as an example to analyze the working principle of the hydraulic cylinder. Hydraulic cylinder as an executive element is essentially an energy converter. Hydraulic cylinder will input liquid pressure energy into the piston linear movement of mechanical energy. The so-called input hydraulic energy refers to the input liquid has the flow and pressure, the output mechanical energy is the piston moves with the speed v (m / s) and traction f. All these parameters are dependent on changes in the working volume to realize, so that the hydraulic cylinder is a volumetric type of implementation of the element.
2 plunger cylinder from the inlet to the cylinder barrel 1 input pressure p pressure oil, plunger 2 under the action of oil pressure to push outward, plunger 2 return, relying on the external force back, such as the plunger cylinder is placed vertically, you can rely on the plunger's own weight back, sometimes also rely on the spring force and other external forces to achieve the return.
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Hydraulic rotary cylinder slewing cylinders are a tightly assembled fittings, which use hydraulic pressure in a small space to gather a very high torque. Despite the high power they can be controlled precisely and easily.
In order to achieve effective and reliable function, high manufacturing precision is required. The interior of the cylinders is perfectly protected against dust, dirt and moisture. This precision is accompanied by a sturdy, well-sealed housing that allows the cylinder to withstand operating pressures of up to 350 bar.
Based on the small size of the rotary cylinder, strength and reliability cannot be perceived. The design is based on a system with multiple helical gears. The linear motion of the piston is converted into rotary motion by means of multiple helical gears. The longer the linear motion of the piston, the greater the rotary motion.