What are the advantages and disadvantages of electric cylinders vs. hydraulic cylinders?

Electric cylinders and hydraulic cylinders are common mechanical actuators, their main difference lies in the working principle and the way of use, today Minghui Automation will take you to learn more about the difference between electric cylinders and hydraulic cylinders. The working principle of the electric cylinder: 1

The electric cylinder is driven by a servo motor, and its movement is controlled by a controller. 2.The movement of the electric cylinder is determined by three parameters: position, speed and direction.

3.The movement of the electric cylinder can be precisely adjusted by the controller, which can achieve high-precision positioning and control. The working principle of the hydraulic cylinder:

1.The hydraulic cylinder is driven by a hydraulic pump, and its movement is controlled by a hydraulic valve. 2.

The movement of the hydraulic cylinder is determined by three parameters: position, speed and direction. 3.The movement of the hydraulic cylinder needs to overcome the viscous force and friction of the liquid, so its movement speed is relatively slow.

How to use electric cylinders and hydraulic cylinders: 1Electric cylinders are usually used in applications that require high precision, high speed, and positioning accuracy, such as industrial robots, automated production lines, etc.

2.Hydraulic cylinders are usually used in occasions that require high power and high torque, such as heavy machinery, excavators, etc. 3.

Electric cylinders can be positioned and controlled with high precision through a controller, while hydraulic cylinders need to rely on hydraulic valves to achieve the same function. To sum up, electric cylinders and hydraulic cylinders have their own advantages and disadvantages, and are suitable for different occasions. If high precision, high speed and positioning accuracy are required, electric cylinders should be selected; If you need high power and high torque, you should choose a hydraulic cylinder.

Footprint – While hydraulic cylinders are compact, the overall footprint of an electric cylinder system is typically much smaller considering the footprint of the hydraulic power unit, allowing for a more compact and efficient machine design.

Lifetime - The life of an electric cylinder can be estimated by L10 calculations and dynamic load ratings, while the service life of a hydraulic cylinder is extremely difficult**. **Calculating Total Cost of Ownership infographic. Electric cylinders allow users to better calculate and select actuators that meet their system life requirements.

Efficiency - Electric cylinder systems are typically in the 75-80% range, while hydraulic systems typically achieve around 40-55% efficiency.

Maintenance - Electric cylinders require very little maintenance, and hydraulic systems rely on seal integrity to achieve proper performance through the system. Due to wear, temperature, and other factors, seal integrity and performance will be reduced.

Temperature - Using high and low temperature greases, the electric cylinder can operate in extreme temperatures with minimal impact on performance. I know that there is a Lianhua servo electric cylinder in Guangzhou with advanced technology, you can learn about it.

Leaks and Environmental Issues - Leaks in hydraulic systems are only a matter of time. Leaks can be a safety hazard and can also lead to a number of environmental problems.

Data Acquisition – The servo system used with the electric cylinder always provides position, speed and force torque data to the control system and provides better monitoring of the process.

High precision: The electric cylinder is connected with the control system such as the host computer to achieve high-precision motion control. The control accuracy is easily achieved, and the electric cylinder can be used in harsh environments without failure, with a protection level.

IP66 can be achieved.

2.Ultra-long life: electric drive, completely relieve the trouble of air leakage, but also provide a long service life.

3.Low noise and low vibration: electronic cushioning and braking control at the end, no impact, extremely low noise and vibration, reduce the impact on the overall equipment, and improve production efficiency.

4.High speed: up to 6m s, up to 10g acceleration.

Extremely high response speed and long service life even at high speeds.

5.Low-cost maintenance: The electric cylinder only needs regular grease lubrication to work in complex environments, and there are no wearing parts that need to be maintained and replaced, which will be better than the hydraulic system.

and the pneumatic system reduces a lot of after-sales service costs.

6.Environmental protection and energy saving: the current environment is more environmentally friendly, more energy-saving, and cleaner, and it is easy to connect with PLC and other control systems to achieve high-precision motion control.

Disadvantages of electric cylinders:

1. The impact load will affect the lead screw of the electric cylinder.

or bearings, which may affect the performance of the entire system. It can also cause problems that make it difficult to maintain the locked position or have gaps.

2. The electric cylinder can not bear the force from the radial direction, but can only act on the axial load, most of the electric cylinders on the market are light loads used in the automation industry, and the heavy ones need to take into account too many factors, thus restricting the electric cylinders in heavy loads.

The development of the industry.

Advantages of hydraulic cylinders:

Compared with the cylinder, it can withstand the pressure of 15 tons with a working pressure of 100MPa.

It is made of No. 45 high-quality carbon steel.

It has the characteristics of anti-leather labor strength, impact resistance, non-magnetism, etc., while its own weight is reduced 2 3.

3. Hydraulic cylinder.

The operating temperature range can reach -60 200 degrees, and its ultra-long life does not cause any failure after 6000 hours of operation.

4. The hydraulic cylinder is a masterpiece of hydraulic components and hydraulic technology, so its new structure and a variety of working methods are the biggest features of the hydraulic cylinder.

Disadvantages of hydraulic cylinders:

1. The design formula of the hydraulic cylinder is not reasonable, and a large safety factor cannot be obtained.

Therefore, the design theory of structure and strength of hydraulic cylinder is still lagging behind, which leads to certain limitations in its motion characteristics.

2. The force of the hydraulic cylinder is underestimated, and unsafe conditions are still inevitable, such as: the piston rod in the cylinder is broken.

3. Compared with the cylinder, the hydraulic cylinder is easy to leak oil (the working medium hydraulic oil is a large consumption.) ）

The positioning of the project should be comprehensively considered from all aspects, not only to deeply analyze the actual value and significance of the project in the road network, to analyze the environment and conditions of the project construction, but also to effectively combine the situation of regional economic construction. In fact, the following two ways are used: to prevent the use of too low technical standards, which will lead to the early saturation of the traffic volume of the highway before realizing the traffic life, and then to adopt the way of expansion, or to adopt the way of building a new road with the same channel; Prevent technical standards from being too high.

We should treat the problem of satisfying the characteristics of railway construction with an advanced vision, but if we are too advanced, the actual law of the development of things will be affected, and then the construction funds will be very tight, and ultimately the construction and development of the national economy will be affected to a great extent. 2.Emphasis on the functionality of the project.

In the actual implementation, we must pay attention to the degree of fit between the technical standards and the application function. The technical standards of the proposed project must conform to the actual bearing performance of the natural environment of the route corridor, otherwise the amount of work will increase, and the project cost will be increased. Preparation of estimates, budget estimates, budgets.

If the estimation results are to be more reliable and scientific, it is necessary to analyze all aspects of the project in depth, compare it with the project content of the comprehensive indicators, and make effective adjustments if necessary. The formulation of investment estimates for project feasibility studies should have good accuracy, but only by using scientific pricing basis can the project cost truly meet the actual needs of the project. 2.

In the process of formulating estimates and budgets, the engineering quantity of each stage must be strictly calculated, and it should be carried out in strict accordance with the principle of engineering quantity calculation. After the railway project budget estimate is formulated, it must be verified with the help of cost analysis. Based on the actual results of the estimate and budget, the corresponding economic indicators are obtained, and whether there is any contradiction between the indicators and the project standards and engineering quantities is analyzed; The indicators are compared horizontally with those of similar architectures of other projects, and their laws and reasons are analyzed, and the rationality of these laws and relationships is analyzed.

If there is an abnormal mutation, it is necessary to find out the cause at the first time, analyze the shortcomings in the design process, and the defects in the budget, and finally use effective measures to solve them.

Both an electric cylinder and an electric actuator are mechanical devices that can be driven by electricity. The main difference between them is how they move and what they are used in. An electric cylinder is a device that combines a hydraulic cylinder and an electric motor.

It drives the hydraulic cylinder motion through the motor, which can realize reciprocating motion and rotary motion. Electric cylinders can be used in applications that require high pressure and high flow rates, such as industrial robots, automotive manufacturing, aerospace and other fields. An electric actuator is a device that combines a motor and a screw.

It drives the screw to rotate through the motor, which drives the push rod to move. Electric actuators can be used in situations that require low pressure and high thrust, such as robotic arms, automated production lines and other fields. In addition, electric actuators can also be divided into two types: straight rods and curved rods, which are suitable for different application scenarios.

Straight electric actuators are suitable for occasions that require parallel movement, such as lifting platforms, stage machinery, etc.; The electric actuator of the curved rod is suitable for occasions that need to be turned, such as automated production lines, conveyors, etc. Therefore, although electric cylinders and electric actuators are both mechanical devices driven by electric motors, they have different modes of movement and application scenarios. Choosing the right actuator or cylinder depends on your specific application needs.

Difference Between Electric Cylinder and Pneumatic Cylinder:

The power of the electric cylinder is provided by an electric power source; The motion control of the electric cylinder adopts electrical control, which is more convenient and accurate.

The power of the cylinders is provided by compressed air; The control of the cylinder movement is controlled by pneumatic control elements.

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What is the function of the hydraulic cylinder, the role of the hydraulic cylinder is to inhale and excrete the substances that need to be treated through its own function. Hydraulic ram is a hydraulic actuator that converts hydraulic energy into mechanical energy and does linear reciprocating motion (or oscillating motion). It has a simple structure and works reliably.

When it is used to realize reciprocating motion, it can avoid the deceleration device, and there is no transmission clearance, and the movement is stable, so it is widely used in the hydraulic system of various machinery. The output force of the hydraulic cylinder is proportional to the effective area of the piston and the pressure difference between its two sides; The oil cylinder is basically composed of cylinder barrel and cylinder head, piston and piston rod, sealing device, buffer device and exhaust device. Buffers and exhausts vary depending on the application, but others are essential.

The field involved is very wide, the previous few have been introduced, I will not introduce, the need to use telescopic linear motion of the place, may involve this thing.

The electric cylinder is an electric actuation system with high precision, high integration, strong environmental adaptability and light pollution. The electric cylinder motor drives the screw to rotate through the transmission mechanism such as synchronous pulley, gear, turbine worm, etc., which has the characteristics of flexible coordination, easy installation, simple setting and easy use, and also has the characteristics of high strength, small return clearance, long life, good control performance, high control accuracy and low maintenance cost.

The electric cylinder converts the rotary motion of the motor into the linear closed-excitation motion of the push rod through the mechanical motion of the screw, and the closed-loop control characteristics of the servo electric car can easily realize the precise control of thrust, speed and position. The use of modern motion control technology, numerical control technology and network technology to achieve programmed and networked control, and do not need to convert the energy twice to achieve the purpose of drive control, so as to achieve the role of energy saving and environmental protection. Due to the convenience of control and use, the electric cylinder will realize the precision motion control that the transmission of the cylinder and the hydraulic cylinder cannot realize.

1. Energy saving and clean, simple operation, simple maintenance, and strong environmental adaptability. The servo electric cylinder can adapt to different environments, is not easily affected by temperature, and can work normally in low temperature, high temperature, rain and snow and other harsh environments without failure. The degree of protection is high, and it can reach IP66.

The seals can prevent dirt and water from polluting the parts in the cylinder, and can prevent the leakage of lubricant inside, maintain long-term work, and achieve the characteristics of high strength, fast speed, high positioning accuracy, smooth operation, and low noise.

2. High transmission efficiency. The electric shield guessing cylinder adopts precision transmission elements, which saves some complex structures and greatly improves the transmission efficiency.

3. High positioning accuracy and high accuracy. The servo electric cylinder adopts a ball screw, through control, the positioning can be to the left and right macro noisy type, the positioning accuracy is very high, and it is suitable for use in occasions that require high precision.

4. The composition is simple, the space is small, and it is easy to maintain. The servo-electric cylinder is composed of a motor, a nut and a screw, which is simple in composition and small in overall size, and will not occupy too much working space. Due to the simple structure, it is easy to find the cause of the obstacle in the event of a failure, and the usual maintenance is also convenient.

There are a lot of electric cylinders, and electric cylinders are not easy to stick to steel.

Precise action, silent and environmentally friendly, long life, low maintenance cost.