From the old thought, cylinder and electric actuator have always been regarded as automation equipment belonging to two completely different industries. With the continuous improvement of electrification level, electric actuator has gradually penetrated into pneumatic industry, and they have market competition and complement each other in application. In the current channel, people will compare the advantages of cylinder and electric actuator in terms of technical characteristics, purchase and use cost, power and energy efficiency, application place and sales market situation



1. Comparison of technical characteristics



As we all know, compared with the electric actuator, the cylinder can work reliably under extreme standards, and it is convenient to use, and the foundation can maintain maintenance free. Cylinder is good at reciprocating straight-line movement with uniform speed, especially suitable for the largest number of transmission regulations in industrial control automation - parallel line transportation of steel parts. In addition, only adjusting the one-way throttle valve installed on both sides of the cylinder can easily maintain a stable speed control, which also becomes a big feature and advantage of the cylinder driver system software. Therefore, for customers who do not have more precise positioning regulations, most of them focus on the application of electric actuators in the field of industrial production of cylinders from the perspective of application convenience. Most of them are all high-precision and more precise positioning regulations, because it is difficult to achieve with cylinders and the result of grievance.



The electric actuator is suitable for rotating and shaking operation. Its advantage depends on the fast response speed, according to the feedback mechanism to carry out accurate control of speed, position and torque. However, when it is necessary to move in a straight line at a constant speed, the transmission system must be transformed according to the mechanical equipment such as tooth belt or screw nut, so the structure is relatively complex, and the professional skills of the office environment and the actual operation and maintenance staff are often highly regulated.



2. Advantages of cylinder



(1) The regulations for users are low. The basic principle and structure of the cylinder are simple, convenient for installation and maintenance, and the regulations for users are not high. Electric cylinder is not the same, engineering project staff must have some professional knowledge of electrical equipment, otherwise it is likely to be destroyed due to operational errors.



(2) Large output force. The output force of the cylinder is directly proportional to the square meter of the cylinder diameter, while the output force of the electric cylinder is related to three elements: the cylinder diameter, the output power of the motor and the pitch of the screw nut. The larger the cylinder diameter and the output power, the smaller the pitch, the greater the output force. A cylinder with a diameter of 50 mm has a basic theoretical output force of 2000 n. for electric cylinders with the same diameter, although the products of different enterprises are different, most of them do not exceed 1000 n. It is self-evident that the cylinder has advantages at the output force level.



(3) Strong adaptability. The cylinder can work normally in high temperature and ultra-low temperature natural environment and has the ability of anti pollution and moisture-proof. It can be integrated into all kinds of extreme natural environment. However, due to the fact that the electric cylinder has many components of electrical equipment, it has high requirements for the natural environment and weak adaptability.



The advantages of electric cylinder are reflected in the following three aspects:



(1) The composition of system software is relatively simple. Because the motor is generally integrated with the engine block, plus the control board and cable, the whole system software of the electric cylinder is composed of these three parts, simple and compact.



(2) The number of terminated parts is large and the linearity is high. Generally, there are middle and low-end electric cylinders and high-end electric cylinders. There are 3, 5, 16 and 64 ending positions of middle and low-end goods, which have certain changes according to different enterprises. High-end goods can also exceed hundreds or even hundreds of positions. In the aspect of precision, the electric cylinder also has absolute advantages, and the precision level reaches 0.05mm, so it is often used in high-precision manufacturing industries such as electronic devices, semiconductor materials, etc.



(3) Strong flexibility. There is no doubt that the flexibility of the electric cylinder is much better than that of the cylinder. Because the control board can be connected with PLC immediately, it can maintain precise control of the motors speed ratio, precise positioning and forward turning. At a certain level, the electric cylinder can According to the requirements, we must carry out fitness exercise at will; because the fluid density of the steam body and the inertia force caused by fitness exercise, even if there is no more cooperation between the hydraulic reversing valve and the magnetic switch, it can not guarantee the accurate and accurate positioning of the cylinder, so there is no way to talk about the flexibility.


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