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Oil Cylinder
Oil cylinders (hydraulic cylinders) are hydraulic actuators that convert hydraulic energy into mechanical energy and realize linear reciprocating or swinging movement. They are widely used in engineering machinery, industrial equipment, agricultural machinery, medical equipment and other fields. The following is its detailed introduction:
1. Basic structure of oil cylinder
The oil cylinder is mainly composed of the following parts:
Cylinder cylinder and cylinder head: Constituting the main structure of the oil cylinder, accommodating hydraulic oil and pistons.
Piston and piston rod: The piston moves under the action of hydraulic oil, driving the piston rod to output force or move.
Sealing device: prevent hydraulic oil from leaking and ensure the normal operation of the oil cylinder.
Buffering device and exhaust device: The buffering device is used to reduce the impact when the piston moves to the end of the stroke, and the exhaust device is used to discharge the air in the oil cylinder.
2. Working principle of oil cylinder
The operation of the oil cylinder is based on Pascal's law, that is, in a closed liquid, the pressure applied to the liquid is evenly transmitted to various parts of the liquid. When hydraulic oil enters one side of the cylinder, the pressure of hydraulic oil pushes the piston to move, and the piston rod transmits force to the external load, realizing mechanical movement.
3. Classification of oil cylinders
According to different classification standards, oil cylinders can be divided into the following types:
According to the movement mode: linear reciprocating and moving cylinders: such as piston cylinders, plunger cylinders, and telescopic cylinders.
Rotary swing cylinder: For example, a swing cylinder can output torque and achieve reciprocating swing.
According to the hydraulic pressure action situation: Single-acting oil cylinder: Only movement in one direction can be achieved by relying on hydraulic pressure, and the return journey depends on external force or self-weight.
Double-acting oil cylinder: It can input pressure oil from both sides of the piston to achieve bidirectional movement.
According to structural form: piston oil cylinder: single piston rod hydraulic cylinder, pressure oil or return oil can be used at both ends of the inlet and outlet oil ports to achieve bidirectional movement.
Plunger oil cylinder: Single-acting hydraulic cylinder, which can only achieve movement in one direction by hydraulic pressure, and the return journey depends on external force or the plunger's own weight, and is suitable for long-stroke hydraulic cylinders.
Telescopic oil cylinder: It has two-stage or multi-stage pistons. The order of piston extension in the telescopic hydraulic cylinder is from large to small, and the order of no-load retraction is from small to large, which can achieve a longer stroke and is compact in structure.
Swing cylinder: outputs torque and realizes reciprocating movement, including single blade, double blade, spiral swing and other forms.
4. Application fields of oil cylinders
Oil cylinders have wide applications in many fields, including but not limited to:
Construction machinery: such as excavators, cranes, bulldozers, etc., used to control the movement of machinery.
Industrial machinery: such as robotic hands, robotic arms, mechanical drilling machines, etc., used to achieve precise motion control.
Agricultural machinery: such as tractors, harvesters, etc., used to control the movement of agricultural machinery.
Medical machinery: such as surgical machinery, rehabilitation machinery, etc., used to achieve precise medical operations.
Traffic machinery: such as car cranes, forklifts, etc., used to control the movement of traffic machinery.
5. Selection and maintenance of oil cylinders
Selection considerations: Clarify the requirements: Determine the type, specifications and performance requirements of the oil cylinder according to the application scenario.
Working environment: Consider the environment in which the cylinder will work, such as temperature, pressure, medium, etc.
Parameter selection: Accurately calculate the inner diameter, stroke, working pressure, speed and other parameters of the oil cylinder according to the working requirements.
Brand and Quality: Choose well-known brands and high-quality oil cylinders to ensure product reliability and after-sales service.
Maintenance: Replace hydraulic oil regularly: Keep the hydraulic oil clean to prevent oil contamination and cause wear of the oil cylinder.
Check sealing performance: Check the seals of the cylinder regularly to prevent leakage and damage.
Cleaning and protection: Keep the surface of the oil cylinder clean, prevent dust and debris from entering the inside of the oil cylinder, protect the outer surface of the piston rod to prevent bumps and scratches.
Oil cylinders (hydraulic cylinders) are hydraulic actuators that convert hydraulic energy into mechanical energy and realize linear reciprocating or swinging movement. They are widely used in engineering machinery, industrial equipment, agricultural machinery, medical equipment and other fields. The following is its detailed introduction:
1. Basic structure of oil cylinder
The oil cylinder is mainly composed of the following parts:
Cylinder cylinder and cylinder head: Constituting the main structure of the oil cylinder, accommodating hydraulic oil and pistons.
Piston and piston rod: The piston moves under the action of hydraulic oil, driving the piston rod to output force or move.
Sealing device: prevent hydraulic oil from leaking and ensure the normal operation of the oil cylinder.
Buffering device and exhaust device: The buffering device is used to reduce the impact when the piston moves to the end of the stroke, and the exhaust device is used to discharge the air in the oil cylinder.
2. Working principle of oil cylinder
The operation of the oil cylinder is based on Pascal's law, that is, in a closed liquid, the pressure applied to the liquid is evenly transmitted to various parts of the liquid. When hydraulic oil enters one side of the cylinder, the pressure of hydraulic oil pushes the piston to move, and the piston rod transmits force to the external load, realizing mechanical movement.
3. Classification of oil cylinders
According to different classification standards, oil cylinders can be divided into the following types:
According to the movement mode: linear reciprocating and moving cylinders: such as piston cylinders, plunger cylinders, and telescopic cylinders.
Rotary swing cylinder: For example, a swing cylinder can output torque and achieve reciprocating swing.
According to the hydraulic pressure action situation: Single-acting oil cylinder: Only movement in one direction can be achieved by relying on hydraulic pressure, and the return journey depends on external force or self-weight.
Double-acting oil cylinder: It can input pressure oil from both sides of the piston to achieve bidirectional movement.
According to structural form: piston oil cylinder: single piston rod hydraulic cylinder, pressure oil or return oil can be used at both ends of the inlet and outlet oil ports to achieve bidirectional movement.
Plunger oil cylinder: Single-acting hydraulic cylinder, which can only achieve movement in one direction by hydraulic pressure, and the return journey depends on external force or the plunger's own weight, and is suitable for long-stroke hydraulic cylinders.
Telescopic oil cylinder: It has two-stage or multi-stage pistons. The order of piston extension in the telescopic hydraulic cylinder is from large to small, and the order of no-load retraction is from small to large, which can achieve a longer stroke and is compact in structure.
Swing cylinder: outputs torque and realizes reciprocating movement, including single blade, double blade, spiral swing and other forms.
4. Application fields of oil cylinders
Oil cylinders have wide applications in many fields, including but not limited to:
Construction machinery: such as excavators, cranes, bulldozers, etc., used to control the movement of machinery.
Industrial machinery: such as robotic hands, robotic arms, mechanical drilling machines, etc., used to achieve precise motion control.
Agricultural machinery: such as tractors, harvesters, etc., used to control the movement of agricultural machinery.
Medical machinery: such as surgical machinery, rehabilitation machinery, etc., used to achieve precise medical operations.
Traffic machinery: such as car cranes, forklifts, etc., used to control the movement of traffic machinery.
5. Selection and maintenance of oil cylinders
Selection considerations: Clarify the requirements: Determine the type, specifications and performance requirements of the oil cylinder according to the application scenario.
Working environment: Consider the environment in which the cylinder will work, such as temperature, pressure, medium, etc.
Parameter selection: Accurately calculate the inner diameter, stroke, working pressure, speed and other parameters of the oil cylinder according to the working requirements.
Brand and Quality: Choose well-known brands and high-quality oil cylinders to ensure product reliability and after-sales service.
Maintenance: Replace hydraulic oil regularly: Keep the hydraulic oil clean to prevent oil contamination and cause wear of the oil cylinder.
Check sealing performance: Check the seals of the cylinder regularly to prevent leakage and damage.
Cleaning and protection: Keep the surface of the oil cylinder clean, prevent dust and debris from entering the inside of the oil cylinder, protect the outer surface of the piston rod to prevent bumps and scratches.
