With the increasing requirements of factory automation, electric cylinder came into being. The so-called electric cylinder (also known as electric actuator) is a motor driven screw rotation, through the nut into a linear motion, and push the sliding table along the guide rail like the cylinder for reciprocating linear motion. In order to meet the requirements of different industrial applications, Infineon provides a variety of electric cylinder specifications. It is a new revolutionary product that can realize high-precision linear motion series. Compared with the traditional hydraulic cylinder and cylinder, the electric cylinder does not need hydraulic oil or air as the medium, and its performance is not easy to be affected by the external environment, and it does not need the complicated pumps and valves like the hydraulic system. It has the advantages of simple structure, high precision, fast response and high stability. It is a substitute for the traditional hydraulic cylinder and cylinder, which meets the needs of many working occasions and has a wide range of applications Market prospects. Lets take a look at the comparison between infilin electric cylinder and traditional cylinder and hydraulic cylinder.
1、 Comparison between electric cylinder and traditional cylinder:
1. Actuator: the traditional cylinder is mainly composed of solenoid valve, filter, pressure reducing valve and other components, and its power output source is steam compressor air pump, so the cost allocated to each shaft is low. Each axis of the electric cylinder system needs a servo driver as the power unit output. At this point, the hardware cost of servo cylinder and driver system is higher than that of cylinder.
2. Control equipment: both the cylinder and the electric cylinder need PLC and other controllers. The cylinder controls the solenoid valve of the cylinder through the relay, so as to realize some complex motion control, and also need to use additional sensors; and the electric cylinder can realize various motion functions through the above servo driver, without additional control components.
3. System design: in terms of hardware, the cylinder has more components and the system is more complex, so the hardware design time and cost are high. However, the structure of electric cylinder is very simple, and the component types are only cylinder, driver and controller, so its hardware system integration is relatively simple. In terms of software, from the perspective of application, it is difficult to distinguish the difference between the two, because it depends on its application.
4. In practical application, the power of the cylinder must use air pressure as the intermediate medium, and there is leakage problem in the operation process, so its energy consumption efficiency is not high; while the power of the electric cylinder is directly converted into mechanical energy through electrical energy, its energy consumption efficiency is high.
2、 Comparison between electric cylinder and traditional hydraulic cylinder:
1. Installation: the electric cylinder uses simple wiring for all points of operation, which is directly compatible with other electronic control components; while the hydraulic cylinder needs oil pipe, filter device and pump, etc. Close attention must be paid to the compatibility of components.
2. Accurate positioning: the electric cylinder is economical, repeatable and has the ability of rigid multiple stops; while the hydraulic cylinder needs position detection and precise electro-hydraulic valve components, which may cause crawling;
3. Control: the electric cylinder controls the complex motion of the equipment automatically through the solid-state processor; while the hydraulic cylinder needs the electronic / fluid interface, in some cases, it needs to adopt the different valve design. Because of the hysteresis effect, static zone, pressure supply and temperature change, the control is very complex;
4. Speed: the electric cylinder is stable and has the ability of variable speed, and the speed range is from 0.5 to 1500 mm / S; while the hydraulic cylinder is difficult to accurately control, it will change with temperature and wear, and there may be adhesion and sliding problems;
5. Reliability: the electric cylinder has repeatable and reproducible performance in the whole service life of the product, and almost does not need maintenance; while the hydraulic cylinder is very sensitive to pollution, the fluid source needs to be maintained, and the seal is easy to leak. If you are diligent in maintenance, you can ensure good reliability;
6. Output: the maximum electric cylinder is 500kN, and the hydraulic force is almost unlimited and the power is the most powerful;
7. Cycle life: the life of electric cylinder can reach hundreds of cycles under rated load, which is easy to predict; while the life of hydraulic cylinder depends on the design and seal wear, which is usually good;
8. Environment: the rated temperature range of the standard model of electric cylinder is from - 20 ℃ to 120 ℃, which has the characteristics of cleanness and high energy efficiency; while the hydraulic cylinder may have serious problems under extreme temperature, the seal may leak, and the problem of waste disposal is becoming more and more difficult;
9. Safe load fixing function: if the electric cylinder is cut off, the optional brake motor, automatic brake and screw rod device will automatically lock; while the hydraulic cylinder must use complex backup safety equipment;
10. Cost: the original cost of electric cylinder is medium, the maintenance and operation cost is very low; the installation and maintenance cost of hydraulic cylinder is high. The cost of the new hydraulic power plant is high.
Electric cylinder is also called electric actuator, servo electric cylinder, electric hydraulic telescopic cylinder, electric sliding table, linear sliding table, industrial manipulator, etc., which is the best substitute for traditional cylinder.