Classification of oil cylinder application scenarios

Large Hydraulic Cylinders for construction machinery:such as boom cylinders for excavators and bucket cylinders for loaders, need to adapt to harsh construction environments and have high strength and wear resistance.

 

Large oil cylinders used in metallurgical equipment:such as the press down oil cylinder of rolling mills and the crystallizer vibration oil cylinder of continuous casting machines, have high working temperatures and heavy loads.

 

Large oil cylinders for ships and marine engineering: used for ship servos and positioning system oil cylinders for marine platforms, they need to have corrosion resistance and fatigue resistance.

 

Four column vulcanizing machine oil cylinder: adopting a four column guiding structure, commonly used in 63T four column vulcanizing machine oil cylinder and 200T four column vulcanizing machine oil cylinder. The cylinder body is mostly made of cast steel, suitable for flat vulcanizing machine oil cylinder and conveyor belt peeling machine oil cylinder, with the characteristics of stable operation and uniform load.

 

Frame type vulcanizing machine oil cylinder: integrated into the frame type vulcanizing machine, supporting fast lifting and slow mold closing functions, commonly used in tire vulcanizing machine oil cylinders and rubber product pressing oil cylinders, requiring sealing performance under high-temperature vulcanization environments.

 

 

Pressure holding vulcanizing machine oil cylinder: equipped with long-term pressure holding function, combined with PLC control system to achieve pressure stability in the vulcanization process, suitable for the production of rubber and plastic products with high requirements for vulcanization precision.

 

Fast lifting vulcanizing machine oil cylinder: By optimizing the oil circuit design, the mold can be quickly opened and closed to improve production efficiency. It is commonly used in semi-automatic or fully automatic vulcanizing machines, such as the double headed oil cylinder 5 of small experimental flat vulcanizing machines.

 

30T-300T rubber flat vulcanizing machine oil cylinder: 60T rubber flat vulcanizing machine oil cylinder, 100T rubber flat vulcanizing machine oil cylinder, 200T rubber flat vulcanizing machine oil cylinder, 300T rubber flat vulcanizing machine oil cylinder is matched with different tonnage (30T-300T) flat vulcanizing machines. The worktable size is diverse (such as 600600mm, 10001000mm), and the material is mostly QT500-7 ductile iron to ensure smooth operation.

 

Tire vulcanizing machine cylinder: specially designed for tire vulcanization, it needs to withstand high temperatures and cyclic loads. The cylinder structure is complex and often used in conjunction with vacuum systems.

 

 

The ceramic press cylinder is designed according to the characteristics of ceramic forming technology, with the core of reducing processing difficulty and improving durability. Its categories are divided as follows:

 

Split type sliding chamber oil cylinder: The cylinder body is divided into a first sliding wall and a second sliding wall, and the sliding chamber corresponds to the first and second sliding parts. The piston and cylinder body are matched in sections to reduce machining tolerances, lower inner wall machining requirements, and improve production efficiency.

 

Built in sealing groove oil cylinder: The first sealing ring is integrated into the inner wall of the cylinder sliding chamber to accommodate the groove, instead of the traditional piston outer seal, reducing piston wear and extending service life.

 

Ceramic dry pressing Hydraulic Cylinder: used for dry pressing of ceramic powder, requiring stable pressure and precise displacement control, suitable for small experimental presses or large automated ceramic production lines.

 

Ceramic isostatic pressing hydraulic cylinder: used in conjunction with isostatic pressing equipment, the cylinder body needs to withstand ultra-high pressure (usually>30MPa), and the material is high-strength alloy to ensure that the cylinder body has no leakage.

 

 

Hydraulic oil cylinder is a key component for hydraulic drive and control in hydraulic engineering, and its classification needs to be combined with structural characteristics, functional requirements, and application scenarios. The following provides a detailed explanation from three dimensions: structural form, functional characteristics, and typical application scenarios.

 

The structural design of hydraulic cylinders needs to adapt to high-pressure, humid, and heavy load conditions in hydraulic engineering, mainly divided into the following types:

 

Piston type hydraulic cylinder: composed of cylinder barrel, piston, piston rod, etc., it uses hydraulic oil to push the piston to achieve reciprocating motion, suitable for scenarios that require linear thrust, such as gate opening and closing piston type ceramic hydraulic cylinder, dam lifting mechanism piston type stainless steel hydraulic cylinder. Its characteristics are good sealing performance, strong load-bearing capacity, and can be matched with large diameter cylinder bodies (such as cylinder diameters of 300mm or more) to meet heavy load requirements.

 

Piston type hydraulic cylinder: With a simple structure, the plunger only receives unidirectional force, and the return relies on its own weight or external force. It is commonly used in low-pressure, long stroke hydraulic equipment, such as manual auxiliary drive devices for small gates. However, due to limitations in sealing performance, it is less commonly used in high-pressure hydraulic systems.

 

Multi stage Telescopic Hydraulic Cylinder: composed of multiple nested cylinder barrels, it can achieve long stroke extension and contraction, suitable for scenarios that require significant height adjustment, such as the lifting control of hydraulic steel dams, and can provide a large working range within a limited space.

 

Hydraulic oil cylinders need to meet special requirements such as waterproofing, anti-corrosion, and buffering. According to their functions, they can be divided into:

 

Hydraulic steel dam dedicated oil cylinder: specially designed for hydraulic steel dams, with high-strength bearing capacity (able to withstand huge loads generated by water pressure) and corrosion resistance (using stainless steel or anti-corrosion coating materials), used to support the dam structure, adjust the dam height, and reduce water flow impact. It is the core executive component of the hydraulic steel dam system.

 

Buffer type hydraulic cylinder: A buffer device (such as throttle valve, buffer sleeve) is installed at the end of the cylinder body to reduce the impact vibration during gate opening and closing or dam movement, protect the structural safety of hydraulic facilities, and be suitable for the drive system of large water gates and ship locks.

 

Synchronous control cylinder: By using hydraulic synchronous valves or electro-hydraulic proportional control cylinders, multiple cylinders can work together to ensure the smooth operation of large hydraulic structures (such as radial gates) and avoid deformation or jamming caused by uneven force distribution.

 

According to the specific equipment types of hydraulic engineering, oil cylinders can be divided into:

Gate drive oil cylinder: used for opening and closing various types of gates (such as flat gates and radial gates), it can be divided into flange connection type (uniform force, suitable for large gates) and foot fixed type (good stability, suitable for heavy-duty gates) according to installation method.

 

Hydraulic hoist cylinder: As the core component of hydraulic hoist, it drives the gate to complete the lifting action. According to the movement mode, it is divided into double acting type (can drive the hoist cylinder in both directions to achieve fast opening and closing of the hoist cylinder) and single acting type (one-way hydraulic drive hoist oil cylinder, return relying on gravity, suitable for small gates).

 

Dredging equipment oil cylinder: Used for hydraulic dredging machinery oil cylinders (such as dredger equipment oil cylinders, dredging robot equipment oil cylinders), bucket equipment oil cylinders or arm drive equipment oil cylinders need to have wear-resistant and anti silt blocking characteristics. The structure is mostly compact to adapt to underwater or narrow space operations.

 

The pressure level of hydraulic cylinders needs to match the engineering load requirements, and common categories include:

 

Medium pressure hydraulic hoist cylinder: working pressure 10-16MPa, suitable for light load scenarios such as small and medium-sized gates, irrigation equipment, etc., such as small hoist 3 in agricultural water conservancy.

 

High pressure hydraulic drive oil cylinder: working pressure 16-31.5MPa, used for gate hydraulic drive oil cylinder or hydraulic steel dam hydraulic drive oil cylinder of large dams and hydropower stations, such as the drive oil cylinder of hydraulic hoists above 2000 tons.