The development history of air compressor

The development history of air compressor

A device used to increase air pressure. We call it an air compressor. There are thousands of types. The most common ones are piston air compressors, screw air compressors, scroll air compressors, and sliding vane air. Compressors, centrifugal air compressors, etc., among which the well-known ones should be piston and screw air compressors, which are also the two with the largest market share. The screw air compressor has been upgraded to many types, including single screw air compressor, water-lubricated oil-free single screw air compressor, twin screw air compressor, variable frequency twin screw air compressor, permanent magnet variable frequency twin screw air compressor Machines, dry oil-free screw air compressors, two-stage compression screw air compressors, permanent magnet variable frequency two-stage compression screw air compressors and more! The following is a brief introduction to the screw air compressor with the largest market share:

　　 One, the market

　　 (1), the international market

　　 In recent years, China's manufacturing industry has continued to grow and develop, from the previous import of complete machines to today's export of complete machines, and the domestic technology and materials are constantly improving! However, the reputation of made in China abroad and even in the world is not very good. At present, the domestic screw air compressors are mainly targeted at the Middle East, Africa and Southeast Asia. As for Europe and the United States, it is difficult for Chinese manufacturers to enter the country, mainly because of their own national conditions. Decided. The foreign markets we face all belong to economically backward areas, so the profits of exported screw air compressors are often not very impressive, so there is still a lot of space in the foreign market that is worth our competition.

　　 (two), domestic market

The prospects of the air compressor industry are good. According to the "2016-2021 China Air Compressor Industry Market Outlook and Investment Planning Analysis Report" of the Prospective Industry Research Institute, 　In recent years, with the rapid advancement of electronic technology, the application field of air compressor technology It has been rapidly expanded and has been widely used in various automated production lines. The development of pneumatic manipulators and flexible automatic technology, the combination of air compressor technology, microelectronics technology, and modern control theory, has enabled air compressor technology to enter the closed-loop-proportional-servo control system from the switch control system, so that the control accuracy has been qualitatively Improvement. Today, air compressor technology has become one of the key technologies to realize industrial transmission and control.

　　 With the rapid development and maturity of China's large-scale machinery industry in recent years, as an important part of large-scale machinery, air compressors have also entered a stage of rapid development. The output of the domestic air compressor industry is growing at an annual rate of more than 20%.

　　Foresight Industry Research Institute report shows that in 2013 my country's air compressor products reached 2.609.5 billion yuan, a year-on-year increase of 37.58%; the industry's total industrial output value was 43.276 billion yuan, a year-on-year increase of 26.00%. In 2010, the market capacity of my country's air compressors was about 20 billion yuan, and by 2015, the market capacity has exceeded 30 billion yuan, and it is expected to maintain steady growth in the future.

　　 From the perspective of corporate competition, the current competition among Chinese air compressor manufacturers mainly relies on price competition, while competition in technology and brands is relatively small. This is related to the corporate structure of the Chinese air compressor industry. With increasing competition in the field of air compressors, competition in technology and brands will play a more important role in the field of air compressors.

　　1, online

　　Online mainly refers to online sales, such as bidding promotion, Taobao mall, e-commerce, etc.! Now we are in a world of cyber craziness. People are used to buying all kinds of products without going out. Taobao Mall’s price wars, whoever buys cheaply, are favored by small businesses and private self-employed people. What they consider is Simple and affordable, no high requirements! Bidding promotion is mainly for manufacturers or designated agents and OEM manufacturers. The main target groups are medium and large enterprises and engineering projects. Customers consider a lot of things, such as technology, pre-sale inspections, after-sales service response time, etc. This part is currently the dominant sales method in the Chinese market, and profits mainly exist in this part, as do high-tech and good products!

Bidding promotion businesses rely on the Internet. These businesses have a certain degree of strength. E-commerce is now a new type of business model, and it is also the direction of future social development. Manufacturing companies move to second and third categories of cities. The city retains e-commerce trading companies, and trading companies are specifically responsible for helping manufacturing companies sell individual products. Therefore, profits are earned by intermediate trading companies. They suppress the purchase price of manufacturers. Get the most benefits from customers! But now the e-commerce is blooming everywhere. A search engine is doing bidding and promotion. A few hundred yuan is invested in the Internet a day. The amount of information is still enough. However, the market is like this. Once one person has done a good job, a group of people will come and rush to do it with you. Therefore, the way of online promotion is getting more and more difficult. Especially after the Wei Zexi incident this year, the state began to rectify the "exaggerated and false promotion" of online promotion. The major online companies changed their models. In the end, they increased the cost of e-commerce, and the cost of trading companies went up. with customer! At the same time, it is also the promotion and competition between various trading companies. It depends on the comprehensive strength of the salespersons. How to win through communication with customers through the phone or the Internet is another challenge!

　　2, offline

　　 (1), "sweeping street style" blindly door-to-door sales. This is a traditional sales model, with low input costs, generally low return rates, a wide audience and few customers in demand. However, often such a sales model can obtain greater profits and make customers feel the real existence. At the same time, it can also tailor various price plans for customers according to customer needs. The transaction rate of high-end products is the most impressive . However, under this model, it is commonplace to eat closed doors. Some people cannot bear the pressure and quit their jobs one after another. Therefore, the sales industry is also the industry with the highest turnover. Sales clerk has become the thing that the company lacks most!

　　 (2) Brand coverage. It relies on agents all over the world, and each region develops different agents, allowing agents to sell their own products, thereby increasing their sales. As for the agency, there is no absolute loyalty, whoever gives a big discount, I will do it. Because from the agent's point of view, I have a problem. You have to actively cooperate, and you have to give me z*excellent prices, and the year-end rebates have to be sufficient before I can do the market for you. Otherwise, I will be fishing for three days and drying the net for two days, and I will do everything. The other aspect is the division of regions. If there is no forced control, serious "internal injuries" will be caused between the agent and the agent, and they will eventually break up without shooting!

　　 2. Development

　　 The (mechanical) vacuum pump made in Germany in 1640 is the originator of modern air compression machinery.

　　 Around 1800, the first single-stage (reciprocating piston) air compressor was made in the UK, and its discharge pressure was 1.38MPa (gauge pressure).

　　 In 1829, the first two-stage reciprocating air compressor with intercooling was designed in the UK.

　　 In 1878, Burckhardt Maschinenfadrik AG, Switzerland, produced the company's s* air compressor with a control slide valve for air distribution.

　　 In 1878, the German H. Krihar first proposed the concept of an air compressor without internal compression. This air compressor is the screw air compressor in the future. However, due to the limitations of the process technology at that time, there was only an idea, and it could not be manufactured.

　　 In 1888, the compressed air station in the pneumatic system of Paris, France, had 14 reciprocating air compressors with a total power of 1500kw.

　　 In 1902, Ingersoll-Rand Co. made the first mobile reciprocating air compressor.

　　In 1904, Atlas Sweden developed the first piston air compressor

　　 In 1907, the Swedish Atlas Company produced the company's first mobile reciprocating air compressor. The internal combustion engine and the single-stage air compressor were both horizontal and shared a crankshaft. This is the world's first integral motorcycle compressor.

　　 In 1930, a mobile air compressor named Monodloc came out. It is essentially a diesel motorized air compressor: vertical, 4-cylinder without crosshead, two-stroke, diesel-powered cylinder, which directly drives the vertical on the same fuselage through the same crankshaft, 2-cylinder, two-stage, single-acting, There is a crosshead compression cylinder.

　　 In 1931, the American Morthington Corp. (Morthington Corp) produced the company's first opposed air compressor, which later developed into today's BDC symmetrical balanced air and gas compressor series.

　　 In 1931, the American Morthington Corp. (Morthington Corp) produced the company's first opposed air compressor, which later developed into today's BDC symmetrical balanced air and gas compressor series.

　　 In 1934, the reciprocating cylinder non-lubricated air compressor of Germany KSB company was made. In the same year, the first reciprocating cylinder non-lubricated air compressor produced by the Wurzen Machinery Manufacturing and Casting Plant in Germany used graphite rings as the material for the reciprocating sealing element.

　　 In 1934, Professor Alf Lysholm of the Royal Institute of Technology in Sweden was the first person to design a screw air compressor and its rotor tooth profile. Since then, screw air compressors have been produced and applied. The screw engine at this time, although theoretically already possesses some of the advantages he needs, it must have a very large displacement to meet the requirements of the gas turbine. Therefore, the screw machine has not been applied in this field. Until 1937, Alf Lysholm successfully developed two types of screw compressor test prototypes at SRM Company, and obtained satisfactory test results.

　　 In 1946, James Howden, a British company located in Scotland, was the first company to obtain a license to produce screw air compressors from SRM in Sweden. Subsequently, many companies in Europe, the United States and Japan have successively obtained such licenses from SRM in Sweden to engage in the production and sales of screw air compressors.

　　In 1957, the oil-injected screw air compressor was introduced, which further improved the shortcomings of the previous screw air compressor, and therefore it has been widely used. In the same period, Atlas, Ingersoll Rand and Sullair successively purchased air compressor parts from q* and assembled them into screw air compressors of their own brands.

　　 In 1960, the famous DT4 short-stroke air compressor and ER8 low-power air compressor from Atlas Company of Sweden came out.

　　 In 1960, French B. Zimmern proposed the idea of ​​a single screw compressor and obtained the patent right. In 1962, the first prototype was trial-produced, and it was officially produced and put on the market by the French Peugeot in the early 1970s. In the late 1970s, countries such as the Netherlands, the United Kingdom, and Japan successively developed and produced single-screw compressors for refrigeration and air-conditioning, with two types: open type and semi-closed type. At the end of the 1980s, technology was advanced to develop and manufacture single-screw compressors for compressing various gases (including air, flammable, explosive and toxic gases) used in petroleum, chemical, mining and other industries. At present, manufacturers in Britain, France, the United States, Japan, the Netherlands and other countries can produce single screw compressors of different specifications.

　　Subsequently, the continuous basic theoretical research and product development test, through the continuous improvement of the rotor profile and the successful development of special rotor processing equipment, the superior performance of the screw air compressor has been continuously brought into play. Since then, various screw air compressors have continued to appear.

　　 In the past two decades, especially in the 15 years that have entered the 21st century, various new technologies of screw air compressors have continuously appeared, processing precision has been continuously improved, and auxiliary equipment has also been improved. These factors make the performance of the screw air compressor more and more affirmed by more and more people, so its scope of use is also expanding. It has become the most popular type of air compressor and has replaced the piston air compressor, becoming the most used A wide range of air compressors.

　　The current market requires energy-saving and environmentally friendly, stable and energy-saving screw air compressors and oil-free air compressors will be the vane of the future

　　 Three, technology

　　 In recent years, with the vigorous implementation of the national energy-saving policy, the screw air compressor industry has also ushered in a new "spring". Whether it is the initial frequency conversion, or the permanent magnet frequency conversion, the two-stage compression of the permanent magnet frequency conversion that is now popular is to meet the market demand. So, how does an air compressor achieve energy saving? Is it really energy saving? This problem seems to plague the majority of users.

　　>>>> 　　 Power frequency energy-saving air compressor:

　　 When it comes to power frequency energy-saving technology, one has to talk about the specific input power of the unit. What is the specific input power of the unit? Simply put, it is the ratio of unit power to the amount of gas produced. The smaller the specific power, the greater the amount of gas produced per unit power, and the more energy-saving naturally. So the question is, how to change the specific power? The most direct and effective method currently used is to work hard on the motor and the nose. If the motor is more efficient, the head should be one size larger. In this way, it won't work if you don't want to save energy. Of course, the electronic control part should not be underestimated. A good electronic control also has the effect of energy saving. 　　>>>>

　　 Frequency conversion air compressor:

　　 Frequency conversion energy-saving technology, in short, is actually through the installation of a frequency converter to adjust the motor speed to meet the changes in the air consumption of the terminal equipment, and then achieve the ultimate energy saving.

　　>>>> 　　 Permanent magnet variable frequency air compressor:

　　 When it comes to permanent magnet frequency conversion, as the name suggests, it is a fuss on the motor, using permanent magnets as the magnetic effect medium. To a certain extent, work efficiency is naturally higher and specific power is smaller. It is not nonsense to realize energy saving with lower specific power.

　　>>>>

　　Permanent magnet variable frequency two-stage compression air compressor:

　　As the terminator of energy-saving technology, permanent magnet variable frequency two-stage compression is to add two-stage compression on the premise of integrating the two major energy-saving technologies of frequency conversion and permanent magnet to achieve a higher level of energy saving.

　　 In fact, no matter what energy-saving technology you use, you need a prerequisite, that is, the unit loading rate. If the unit exceeds 90% or is running at full load, energy saving is almost empty talk.

　　 Therefore, it is particularly important for our customers to choose the models. Before helping customers select models, they must fully understand the usage of the client group, and based on the information provided by the customer, determine whether the client group is running at full capacity in the future. If the client group is running at full capacity, you will blindly push energy-saving machines to customers and tell them how to save energy in order to get a commission for the performance. Wait until the customer turns on