First, the origin of the executive body.
Actuator, also known as actuator, is a commonly used electromechanical integration device (device) in the field of automatic control, and it is the actuator in the three major components of automatic instruments (detection device, adjustment device and execution device). Mainly to automatically operate some equipment and devices, control their switches and adjustments, instead of manual operation. According to the type of power, it can be divided into pneumatic, hydraulic, electric and electro-hydraulic types. According to the movement form, it can be divided into straight stroke, angular stroke and rotary (multi-rotary) stroke. Because using electricity as power has incomparable advantages over other kinds of media, electricity has developed fastest and been widely used in recent years. According to different standards, electric type can be divided into: combined structure and electromechanical integration structure; Electrical control, electronic control and intelligent control (with HART and FF protocols); Digital type and analog type; Manual contact debugging and infrared remote control debugging. It develops rapidly with people's requirements for control performance and the development of automatic control technology.
1. In the early industrial field, many controls were manual and semi-automatic. In operation, the human body is in direct contact with dangerous parts and dangerous media (solid, liquid and gaseous chemicals and radioactive substances) of industrial equipment, which is easy to cause harm to people and very unsafe;
2. The equipment is short in service life, easy to be damaged and has a large amount of maintenance;
3. Semi-automatic control, especially manual control, has low control efficiency, large error and low production efficiency.
Based on the above reasons, actuators are gradually produced and applied in industrial and other control fields, which reduces and avoids personal injury and equipment damage, greatly improves control accuracy and efficiency, and also greatly improves production efficiency. With the rapid development of electronic component technology, computer technology and control theory this year, actuators at home and abroad have entered the era of intelligent control.
Second, the English name of the executing agency: ACTUATORS
Thirdly, the application field of actuators.
Actuators are mainly used in the following three areas:
1. power plant
Typical applications include:
① Application in thermal power industry
Air blower air door air door air door air door air door air door air door air preheating air door air flue gas recirculation bypass air door air door air door air door air door air door air door main bellows air door air door burner adjusting lever burner oscillating driver hydraulic push rod driver impeller speed regulating flue gas regulating valve steam regulating valve ball valve and butterfly valve control sliding door gate.
② Application of valve actuator in other electric power industries.
Ball valve dust removal control water jet impeller speed control control large hydraulic valve gas control valve burner ignition start steam control valve condensate recovery, deaerator, boiler feed water, overheating controller, reheat thermostat controller, and other related valve applications.
2. Process control
It is used for production process control in chemical, petrochemical, mold, food, medicine, packaging and other industries. According to established logic instructions or computer programs, valves, knives, pipes, baffles, chutes, platforms, etc. Precise positioning, starting, stopping, opening and closing, and rotating. Real-time parameters such as temperature, pressure, flow, size, radiation, brightness, chromaticity, roughness and density detected by the system are used to control the system.
3. Industrial automation
Widely used in aviation, aerospace, military industry, machinery, metallurgy, mining, transportation, building materials, etc., it regulates and controls the moving points (moving parts) of various automation equipment and systems in various forms.
The main applications of process control and industrial automation are as follows:
① Application in sulfur mine production
Water injection flow control ball valve and disc valve control
② Application of valve actuator in potassium carbonate pipeline.
Sliding door diverter gate valve ball valve and butterfly valve ball control valve
③ Application of water treatment valve actuator
Liquid flow control pressure regulating valve pressure control acid solution flow control
④ Application of valve actuator in limestone/cement plant
Ball valves or butterfly valves control dry cement, gypsum or liquid. Air supply and induced draft fan damper damper bypass damper damper environmental pollution control and dust removal device Sliding doors control the logistics and storage of raw materials in the hopper. The gate controls the raw material flow at the feed inlet. The gas control valve regulates the air intake of the burner on the converter. The steam control valve controls the steam required for the production process.
⑤ Application of actuators in grain processing plants
Gate diverter valve distributor unloader/heater dust removal isolation baffle airflow control (logistics drying) ball valve and butterfly valve control
⑥ Application of damper baffle and valve actuator in steel plant
Ball valves or butterfly valves control cooling water, waste water or other cooling media; Adjustable damper air supply and induced draft fan bypass damper environmental pollution control and dust removal device; The sliding door controls the raw material flow at the feed inlet; Gas control valve The steam control valve regulates the air intake of the burner on the converter to control the steam required in the production process.
⑦ Application of damper baffle and valve actuator in aluminum plant
Air blower air door air door air door air door air door air door air door air preheating air door air flue gas recirculation bypass air door air door air door air door air door air door air door main bellows air door air door burner adjusting lever burner oscillating driver hydraulic push rod driver impeller speed regulating flue gas regulating valve steam regulating valve ball valve and butterfly valve control sliding door gate.
⑧ Application of process control baffle.
Emergency shutdown of hot/cold air mixture by-pass of air supplementary exhaust fan.
Pet-name ruby application in petroleum industry
Water injection process control gas lift pipeline main valve pressure control water injection process control oil well oil quality sampling test/production valve
Attending the application in natural gas production and transportation industry.
Gas lift gas flow control gas pipeline main valve pressure control compressor surge control natural gas pressure control natural gas pipeline main valve pressure control emergency shutdown natural gas pressure regulator control pressure control compressor surge control flow control.
4. What famous companies are there in the world now?
Foreign executive agencies appeared earlier and have always maintained great advantages. Siemens produced the world's first electric actuator in 1905. Since the early 1990s, some foreign electric actuator manufacturers have developed a new generation of products to occupy the market. The famous companies in the world mainly include the following:
1. Rottok, UK
Since the early 1990s, some foreign electric actuator manufacturers have developed new products to occupy the market. Earlier, British ROTORK introduced IQ intelligent electric actuator in 1995. IQ series intelligent electric actuator is an earlier generation of intelligent electric actuator introduced by British ROTORK Company. The basic type of its actuator is ROTORK multi-circle electric actuator. On this basis, microprocessor, peripheral chip circuit and software are added to realize intelligent control. It uses infrared hand operator to set the parameters of the actuator, so it can realize the wiping technology without opening the cover. Its limit mechanism is set by digital signal generated by Hall sensor, and torque protection is obtained by detecting motor current and magnetic field. This is set by digital signal generated by Hall sensor, and torque protection is obtained by measuring motor current and magnetic field. This kind of electronic sensor replaces the traditional counter transmission mechanism and cam switch assembly, which is convenient for on-site working condition monitoring and safety guarantee and simplifies debugging work.
2. Jordan in the United States
Founded in 1955, American Jordan Control Company has been specializing in the production of electric actuators for power station baffles from the beginning to now, especially in harsh working conditions (such as high ambient temperature, limited installation location, difficult maintenance, frequent movements, etc.). ), Jordan's products have always been the first choice of most users in the world, thanks to the manufacturer's 50 years of experience accumulation and advanced design and manufacturing concepts. In this field, especially in the regulation application with high regulation frequency (the number of times that the actuator can move can reach 2000 to 4000 times per hour), the market share in Europe and America exceeds 70%, and the only one that can compete with it is Hartman &; Braun, but the latter price is more than three times.
Jordan's main advantages are high adjustment frequency (2000-4000 times/hour), integration (motor, servo amplifier and transmission mechanism), permanent lubrication and maintenance-free, installation at any position and angle, spur gear and Scottish yoke transmission mechanism, etc. At present, domestic famous brands (such as ROTORK, SIPOS, AUMA, etc. Without exception, they all adopt split design, especially the gearbox has a short life. The adoption of turbine rod transmission mechanism has the advantages of great wear, high calorific value, low transmission efficiency and short service life, and the highest adjustment frequency can only reach 1200 times/hour. Moreover, it should be lubricated and maintained regularly and cannot be installed in any position.
Main series: SM, LA, MV, VA, EH, TA- 1200, MC- 1 100, SM/LA-3300.
3. EMG in Germany
AEG Group of Germany was founded in 1883, and the electric actuator was produced around 1900. 1946 AEG group, the second-ranked electronic equipment group in Europe at that time (its power plant construction department ranked first in Europe), established a wholly-owned subsidiary EMG to take charge of the electric actuator business. 1976 EMG developed a patented eccentric planetary gear transmission mechanism and successfully applied it to its actuator. 1984 AEG power plant construction department was sold to Siemens, becoming the current KWU power group of Siemens. EMG began to establish an independent global sales network. 1992 AEG group, with global employees exceeding100000, was acquired by Daimler-Benz Group, became the Daimler Industry Department, and was split. 1996 EMG industry group is independent. In 2003, EMG Group set up a China office in China and began to explore the China market.
Main series: DREHMO (standard, Matic I, Matic C)
4. Cross wire
1988, the Swedish company Arcia and the Swiss BBC, which were established in 1883 and 189 1 respectively, were merged and established, with their headquarters in Zurich, Switzerland. ABB Group is a global leader in power and automation technology. ABB Group has thousands of enterprises in over 100 countries around the world, with139,000 employees.
The relationship between ABB and China can be traced back to the beginning of this century: as early as 1907, ABB provided a set of steam boilers to the government of China. With the continuous development of business, the Group has set up its China headquarters in Hongkong, tel: 1974. 1At the end of 1994, the headquarters of China District was moved to Beijing. From 65438 to 0995, ABB registered a wholly-owned holding company: Arcia Brown Bofari (China) Investment Co., Ltd., which was responsible for all investment activities in China. At present, ABB China has 23 sales organizations in Shanghai, Guangzhou, Chongqing, Shenyang, Wuhan, Qingdao, Nanjing, Xi 'an, Chengdu, Fuzhou, Harbin, Tianjin, Dalian, Jinan, Hangzhou, Kunming, Nanning, Shenzhen, Zhengzhou, Changchun, Changsha and Hong Kong, and sales offices in Beijing, Shanghai, Guangzhou, Chongqing, Xiamen and Hefei.
Main series: ONTRAC(MOE700, MME 800)
Ontrac series intelligent electric actuator is an intelligent electric actuator product launched by ABB company in recent years. Its actuator is also a multi-turn electric actuator, and its intelligent controller is installed in the actuator, which is directly operated by the operation panel and displayed by LCD. Through menu operation, set actuator parameters. It uses Hall sensor to obtain position signal. The microprocessor calculates the torque according to the motor slip and compares it with the torque overrun value set by the user. Once the overspeed motor is forced to stop moving, the microprocessor will send out an alarm signal. This electronic torque protection method saves the traditional spring and mechanical switch in the process, and the debugging is very convenient. The actuator can also carry out frequency conversion speed regulation and valve characteristic correction. Besides the traditional 4-20mA control signal, it also provides PROFIBUS DP/V 1 and communication interface.
5. Hartman Brown of Germany (Hartman &; Braun)
Main series: PME 120
AUMA, Germany
7. Siemens AG, Germany
Siemens is the "boss" in the world automation industry, and SIPOS is the abbreviation of Siemens positioner. 1905 produced the world's first electric actuator, with nearly a hundred years of experience in research, development, production and sales of electric actuators. SIPOS is the registered trademark of its electric actuator.
SIPOS has been widely used in various industrial production fields around the world. Almost all the actuators used on the bypass of electric steam turbines in China Power Plant are imported SIPOS. Siemens also sold its SIPOS 1 series and SIPOS 3 series production technologies to two manufacturers in China at 1987 and 1992 respectively. Siemens constantly updated its technology and eliminated SIPOS 1 and SIPOS 3 one after another. For the first time in the world, the advanced and mature motor frequency conversion control technology is creatively applied to the electric actuator, and the motor of the actuator is controlled by the built-in integrated frequency converter. 1997, it introduced a new generation of SIPOS 5 series electric actuators to the new century market.
SIPOS 5 entered the China market at the end of 1997, and was favored by the market because of its simple structure, advanced technology, reliable performance, self-diagnosis of faults, high intelligence and moderate price. In just three years, more than 70 domestic users have successively purchased more than 3,000 sets, and their quality, performance and high cost performance have been unanimously appreciated and recognized by all users.
In order to meet the needs of the market, since 1999 1 October1,the electric actuator department of Siemens has become independent from the huge organization of Siemens, and has become a professional electric actuator company with independent legal person status in Germany under the name of SIBOS (SIBOS Electric Actuator Co., Ltd.). Sibos' headquarters and production plant are located in Nuremberg, Germany, and it has set up sales and service agencies in major countries and regions around the world.
Since 1999 10/day, all the business related to electric actuators of Siemens has been transferred to Sibos, and Siemens no longer produces electric actuators. After independence, Sibos still uses SIBOS as the registered trademark of its electric actuator products, but it no longer belongs to Siemens. Siemens is now one of the main users of Sibos, and Sibos continues to provide products and services to Siemens.
Main series: SIPOS 1, SIPOS3 and SIPOS 5 flashlights.
8. Bernard of France
France Bernard Co., Ltd. is a member of France-China Electric Power Association, founded in 1946, and is a world-renowned professional manufacturer of servo motor actuators. Its nuclear-grade valve motor actuators meet international standards. Since 1950, French nuclear power plants have adopted the company's products. More than 60 nuclear power plants in the world use Bernard's electric actuators. From 65438 to 0996, the company's products began to enter the China market, providing equipment for Daya Bay, Ling 'ao, Qinshan and Tianwan nuclear power plants in China. At present, the company has an annual output of more than 35,000 sets of control equipment, 70% of which are sold abroad and widely used in nuclear power, oil, natural gas, water treatment and other fields.
Main series: servo motor
Bifi, Italy
10. Belofran, USA
1 1. Germany PS
12. Glory of Japan (Unic)
Verb (abbreviation for verb) The history of Jordan Company.
1955 was founded by Mr. Chuck Jordan, 1960 introduced the damping and shock-absorbing actuator to power users, 1964 introduced the solid-state circuit controller, 1968 introduced the straight-stroke electric actuator, 1970 introduced the electric actuator of angular stroke and straight-stroke valve,/. 1979 ~ 1990 became the executive branch of Foxboro Company, 1987 first developed the spring-reset electric actuator, 199 1 became an independent company, 199 1 development. 1995 introduces intelligent digital servo controller, 1996 establishes company website (www.jordancontrols.com) through ISO-900 1 demonstration, 1997, 1998 introduces HART &；; Fieldbus interface, 1999 introduced fast and large thrust hydraulic electric actuators, in 2000, SM-6000 series electric actuators with continuous adjustment capability were introduced, and 200 1- became an independent ROTORK company. There are service and spare parts centers in Beijing, Shanghai and Luoyang.
Introduction of intransitive verb Jordan into China.
From 1978, Shandong Shi Heng Power Plant began to enter the China market. Now there are dozens of power users in China, and there have never been any problems. From the domestic market, it is widely used in the baffle of flue gas system (induced draft fan, coal mill, powder exhauster, primary air, secondary air, etc.). ), control valve electronic actuator (water supply, condensate, recirculation, etc.). ) and fuel system quick open valve.
7. What are the main performances of several executive agencies in China and Jordan?
In China, Jordan mainly has the angle line (SM); Straight stroke (la); Performance of short straight bar (MV, VA).
Eight. The main position of China's executive organs
The actuators and servo amplifiers in China were designed in the 1960s, but there has not been much technological innovation for more than 30 years. The earliest models are DTZ and DTJ. However, in recent years (basically during the Ninth Five-Year Plan), with the continuous improvement of domestic control requirements, relevant research institutions and departments have also developed a new generation of intelligent electric actuators, whose performance has been greatly improved, and the price is less than half of that of imported products.
The development organizations mainly include: Shanghai Automation Instrument Co., Ltd., Sichuan Instrument Group Corporation, Haiwanxun Instrument Co., Ltd., Shanghai Ruikai Instrument Co., Ltd., etc.
The main models are: QSL, QSQ, DKZ-Z, ZKJ-Z, ZILJ, IKJ, etc.
At present, in China, there are many brands of executive agencies (including domestic brands and foreign brands), and the market competition is great. Foreign products are mainly concentrated in the high-end market, while domestic products are concentrated in the low-end market. The quality of foreign products is better, but the price is often several times or even ten times that of domestic brands, and the investment and efforts in technology and business are obviously higher than those of domestic enterprises; At present, some domestic products have reached a high cost performance, but in general, it is still necessary to speed up technological progress and industry incentives and increase business efforts.
Domestic actuators have been widely used in various industries. However, from the perspective of industry, import law enforcement agencies are mainly concentrated in the fields of military industry, electric power, petrochemical, chemical industry, metallurgy, building materials, environmental protection and production lines with high automation. From the perspective of investment, the places where import law enforcement agencies are widely used are mainly large and medium-sized enterprises and pillar industries invested by the state, foreign-invested enterprises, and private enterprises with sufficient funds and strong financing ability.
China's economy is taking off. As the largest manufacturing base in the world, the market potential of executive agencies is still great: major national initiatives such as the development of the western region, the development of the central region, and the revitalization of the old industrial bases in Northeast China; Foreign investment continued to grow; The technological renewal and transformation of old enterprises have brought great opportunities.
At present, domestic enterprise users have got rid of their long-term blindness and become rational, neither blindly worshiping foreign things and obsessing foreign things, nor blindly pursuing low prices. Domestic enterprises are catching up with and catching up with international advanced technology, and strive to improve their popularity; On the other hand, foreign manufacturers aim at China's huge market, and constantly strive to reduce prices to improve their competitiveness in the China market.