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Prospects and prospects of electric actuators

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  • Time of issue:2021-08-05 13:37
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(Summary description)The electric actuator is mainly composed of a servo amplifier and an actuator. The operator can be connected in series. The servo amplifier receives the control signal from the controller and compares it with the feedback signal of the output displacement of the electric actuator.

Prospects and prospects of electric actuators

(Summary description)The electric actuator is mainly composed of a servo amplifier and an actuator. The operator can be connected in series. The servo amplifier receives the control signal from the controller and compares it with the feedback signal of the output displacement of the electric actuator.

  • Categories:News Center
  • Author:
  • Origin:
  • Time of issue:2021-08-05 13:37
  • Views:
Information

The electric actuator is mainly composed of a servo amplifier and an actuator. The operator can be connected in series. The servo amplifier receives the control signal from the controller and compares it with the feedback signal of the output displacement of the electric actuator. If there is a deviation, the difference is After the power is amplified, the two-phase servo motor is driven to rotate. Then it is decelerated by the reducer to drive the output shaft to change the angle of rotation. If the difference is positive, the servo motor rotates forward and the output shaft angle increases; if the difference is negative, the servo motor reverses and the output shaft angle decreases. When the difference is zero, the servo amplifier outputs a contact signal to stop the motor, and at this time the output shaft is stabilized at the corner position corresponding to the input signal. This kind of position feedback structure can make the linear relationship between input current and output displacement better.
Valves are products with low profit margins, and the market competition is very fierce. The distribution of the valve market is mainly based on the construction of engineering projects. The largest users of valves are the petrochemical industry, power sector, metallurgical sector, chemical industry and urban construction sector. The petrochemical industry mainly uses API standard gate valves, globe valves and check valves; the power sector mainly uses high-temperature pressure gate valves, globe valves, check valves and safety valves for power stations and some low-pressure butterfly valves and gate valves for water supply and drainage valves; the chemical industry mainly uses Stainless steel gate valves, globe valves, and check valves; the metallurgical industry mainly adopts low-pressure large-diameter butterfly valves, oxygen shut-off valves and oxygen ball valves; urban construction departments mainly adopt low-pressure valves, such as urban tap water pipelines mainly adopt large-diameter gate valves, and building construction mainly adopts mid-line For butterfly valves, metal-sealed butterfly valves are mainly used for urban heating; flat gate valves and ball valves are mainly used for oil pipelines; stainless steel ball valves are mainly used in the pharmaceutical industry; stainless steel ball valves are mainly used in the food industry. Valves are widely used in the water treatment industry, mainly low-pressure valve products, such as butterfly valves, gate valves, and check valves. It is understood that there are currently more than 2,000 valve companies with a certain scale in the market, most of which are located in Jiangsu, Zhejiang and Central Plains. Due to the relatively low requirements for product technology content, the competition is more intense.
The construction of the power station is developing towards large-scale development, so large-caliber and high-pressure safety valves and pressure reducing valves are required, and fast opening and closing valves are also required. For the needs of complete sets of projects, the supply of valves has developed from a single variety to multiple varieties and specifications. There is an increasing trend that the valves required by an engineering project are all provided by a valve manufacturer.
Electric actuators, like pneumatic actuators, are an important part of the control system. It receives the 4-20mA or 0-10mA DC current signal from the controller, and converts it into the corresponding angular displacement or linear displacement, to manipulate the valve, baffle and other control mechanisms to realize automatic control.

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