Hydraulic Cylinders, as the core actuators in hydraulic systems, are mainly responsible for efficiently converting hydraulic energy into mechanical energy to achieve linear reciprocating or swinging motion. With its simple structure and stable performance, it is often widely used in various types of machinery to replace complex reduction devices and provide gapless and smooth motion. The output force of the hydraulic cylinder is closely related to the effective area of ??the piston and the pressure difference at both ends. Its basic structure includes core components such as cylinder barrel, cylinder head, piston and piston rod, sealing device, etc., and the buffer and exhaust device are configured according to actual needs.
The structure of Hydraulic Cylinders is changeable, so its classification methods are also diverse. According to its movement mode, hydraulic cylinders can be divided into two types: linear reciprocating motion type and rotary swing type. At the same time, according to the action of the hydraulic pressure, hydraulic cylinders can be divided into single-acting type and double-acting type. In addition, the structural form is also an important dimension of classification, including piston type, plunger type, multi-stage telescopic sleeve type, and gear rack type. In addition, the installation form and pressure level of the hydraulic cylinder are also the basis for its classification, such as different installation methods such as tie rods, earrings, base feet, hinge shafts, and different pressure levels such as 16Mpa, 25Mpa, and 31.5Mpa.
Hydraulic Cylinders are a device that converts liquid energy into mechanical energy. It can withstand large forces because its working fluid can transmit force, allowing the hydraulic cylinder to easily withstand large loads. It runs smoothly, and since the flow of the working fluid is continuous, there will be no impact and vibration. Due to its simple structure, small size, reliable operation, and long life, it is widely used in industrial production and can adapt to various working environments and spaces. And it is very convenient to control, and the control of the hydraulic cylinder can be achieved by adjusting the pressure and flow of the hydraulic system.
Hydraulic Cylinders have a wide range of applications in industrial production, mainly including machine tool industries: such as milling machines, drilling machines, lathes, etc., used to control the movement of milling cutters, drill bits, tools, etc. Metallurgical industry: It can be used for the lifting, opening, closing, clamping and other action control of equipment such as drums and rollers. Mining industry: used for lifting, tilting, clamping and other control of mining machinery. Construction industry: used for lifting, tilting, clamping and other control of construction machinery, such as tower cranes, elevators, etc. Agricultural machinery: used for lifting, tilting, steering and other control of agricultural machinery, such as tractors, combine harvesters, etc.
Hydraulic Cylinders can be divided into piston hydraulic cylinders, plunger hydraulic cylinders, telescopic hydraulic cylinders, and swing hydraulic cylinders according to their structure and operation characteristics. They each have structural advantages and processing characteristics.
Piston hydraulic cylinders are divided into single-rod and double-rod structures, with double-acting and single-acting forms. The characteristic of piston movement is unidirectional, requiring external force to push in the opposite direction, while double-acting cylinders can move in two directions through hydraulic pressure. The characteristic of a single-piston rod hydraulic cylinder is that it has a piston rod only at one end. The figure shows a typical single-piston hydraulic cylinder, with inlet and outlet oil ports A and B at both ends. These oil ports can be fed with pressure oil or return oil, thereby achieving movement in two directions. Therefore, this type of hydraulic cylinder is called a double-acting cylinder.
The piston movement of the piston hydraulic cylinder is unidirectional, and its reverse movement requires external force to achieve. Despite this, its stroke is usually longer than that of a single piston rod hydraulic cylinder. Piston hydraulic cylinders mainly include two structures: single rod and double rod. Their fixing methods can be divided into two categories: cylinder body fixing and piston rod fixing. According to the action of hydraulic pressure, it can be divided into single-acting and double-acting types.
The plunger hydraulic cylinder is a single-acting design, the movement is driven by hydraulic pressure, and the return stroke requires external force. It is suitable for long-stroke applications, but due to the weight of the plunger, it is necessary to avoid deformation caused by its own weight when used horizontally. There is no contact between the plunger and the cylinder sleeve, and it is only supported by the cylinder sleeve, which simplifies the processing difficulty of the cylinder sleeve and is particularly suitable for making long-stroke hydraulic cylinders.
Due to the large weight of the plunger, it may sag due to its own weight when placed horizontally, resulting in unilateral wear of the seal and guide, so it is more suitable to use it vertically. The plunger is always under pressure during work, so it needs to have sufficient rigidity to maintain stability.
Telescopic hydraulic cylinders achieve long strokes through multi-stage pistons and are often used in engineering machinery. When the piston is retracted, the length is shorter, and the output speed and force will change. The telescopic hydraulic cylinder contains two or more stages of pistons, which extend in order from large to small, and retract in order from small to large. This hydraulic cylinder can achieve a longer stroke, and at the same time, it is short in length when retracted and has a compact structure. It is often used in engineering machinery and agricultural machinery. As multiple pistons move in sequence, their output speed and output force will change.
Swing hydraulic cylinders are used in machinery that requires rotational motion. Swing or rotational motion is achieved by changing the hydraulic pressure. The structure has single blades, double blades and spiral swing. Swing hydraulic cylinders are hydraulic cylinders with a special structure, and their output motion is swing or rotational motion. This hydraulic cylinder is often used in mechanical systems that require rotational motion, such as engineering machinery, metallurgical machinery, etc. Its working principle is to control the swing angle and force of the piston by changing the direction and size of the hydraulic pressure, so as to achieve the required rotational motion. Swing hydraulic cylinders, as key actuators that output torque and achieve reciprocating motion, have various design forms, including single blades, double blades and spiral swing.
Hydraulic Cylinders are a very important hydraulic component, which has the characteristics of bearing large forces, running smoothly and being highly reliable. They are widely used in machine tools, metallurgy, mining, construction, agriculture and other fields.
-
