Vacuum pump is a enormous quantity wide range of products, production is very big, the output value is not high, but it is really a directly affect the vacuum equipment performance quality indispensable based products.Vacuum pump according to the needs of users and the market dynamics.Market growth of the main driving force comes from the rapid development of semiconductor industry and dry pump and molecular pump application field of widening.
At present, the annual sales of about $2 billion of global vacuum pump market, at around 7% annual growth rate.
There have many vacuum pump manufacturers in china , all of the vacuum pump with annual sales of about 150 million yuan, equivalent to the American Kinney company annual sales of a vacuum pump.Through the analysis of global vacuum pump market we can see that all types of vacuum pump market and application fields are constantly changing and developing.Vacuum pump manufacturing industry in China has a long history and strong foundation, domestic vacuum pump has been applied in many different fields and proven, some pumps also exports abroad, recognised by users abroad and well received, it should be said that vacuum pump manufacturing industry at home and abroad market in China still has a huge space for development.
1. The water ring vacuum pump
Although water ring vacuum pump belongs to rough vacuum pump, but in our country’s petroleum, chemical, electric power, textile, papermaking, medicine and other fields still has very big market. in Abroad, water ring pumps sales account for 14% of all vacuum pump market, second only to dry vacuum pumps, so Nash, Seimems and Kinney companies invest in China or to establish a sales network, expanding market share in China.Because water ring pumps are mostly casting, processing requirements is not high also, belongs to the labor-intensive products, so the domestic water ring pump on price competitive advantage, the key is to improve design, reduced volume, lose weight, improve efficiency, reduce energy consumption.
2. The rotary piston vacuum pump
Rotary piston vacuum pump is a kind of oil seal type vacuum pump.Because rotary piston pump is durable, reliable, domestic and international various kinds of vacuum furnace, coating machine and drying, impregnation equipment is done with plunger pump as the backing pump, but plunger pump casting, processing workload is bigger, so each vacuum factory abroad looking for partners in China.In order to make homemade rotary piston pump can enter the international market, must further reduce pump vibration noise, to eliminate fuel injection and oil spills, improve the rotary piston pump long-running reliability.
3. Direct drive rotary vane vacuum pump
With the expansion of the vacuum technology in various application domains, the demand of direct drive rotary vane pumps is growing.
Because of this vacuum pump quantity is very large , processing and assembling workload is very big, the price is very low, so some foreign vacuum manufacturers set up plants in China.Domestic small and medium sized straight league rotary vane pump technically already pass, prices are far cheaper than foreign pump, so domestic pump has a competitive advantage, the key is to solve the shaft seal leakage and rotary vane materials and vacuum pump oil performance quality problems, ensure that straight league pump in high speed, high temperature performance is stable and reliable operation, and to further improve the domestic straight league rotary vane pumps besides water vapor ability.
4. The roots vacuum pump
Roots vacuum pump production from abroad, several large companies abroad, such as Leybold, Balzers, Alcatell, Edwards and ULVAC, their roots pump sales account for the proportion of global roots pump sales are not more than 5%, the five totaled 20%, roots pump production is not big, but foreign roots pump price is much higher than domestic pump.At present, almost all large or small, high vacuum and vacuum system, in order to shorten the extraction time, increase the production efficiency are equipped with roots pump, so domestic roots pump must be based on the occupation of the domestic market to enter the international market, thus to further reduce the domestic roots pump vibration noise, completely solve the problem of shaft seal leakage, improve the appearance quality of the pump, improve the roughness and cleanliness within the pump.Also consider to some countries and regions, the power frequency is 60 hz, the more sure Paul, in the case of raising speed pump long-running reliability.
At present, the domestic air-cooled in-line atmospheric roots pump progress quickly, technology is ripe.Because of this pump at the bottom of the vent is equipped with gas cooler, some of the cooled gas through the pipeline to return to the pump chamber to cool the rotor, so that the compression heat balance, so this kind of pump can be in-line atmosphere.In order to meet the requirements of different ultimate vacuum, this pump can be used in series, usually add an air-cooled straight in front of the row of atmospheric roots pump, have reached the limit of high vacuum pump before than an order of magnitude.This kind of pump due to out of work in the pump cavity medium, is actually belong to dry the pump.At present, this kind of air-cooled in-line atmospheric roots pump and crew have in petroleum, chemical, plastics, pesticides, steam turbine rotor dynamic balancing, aerospace space simulation device got long running test, so should be promoted and applied in China.
5. Molecular vacuum pump
Many technology of molecular vacuum pump in the field of foreign semiconductor occasion is used instead of centrifugal pump, especially the devices such as sputtering, etching and LCVD adopts compound molecular pump and drawing as the main pump.
Due to the pumping speed of molecular pump for water vapor was only about a quarter with diameter of low-temperature pump pumping speed, so the molecular pump exhaust time is longer than cryogenic pumps.Abroad in order to improve the pumping speed, on the entry side of the molecular pump with a – 130 ℃ ~ 150 ℃ low temperature cold plate, called molecular pump at low temperature, water vapor is captured by the plate at low temperature, the molecular pump away other gases.This kind of low molecular pump in the vacuum coating device application, improved the production efficiency and improve the coating quality.With China’s semiconductor industry, film industry and the rapid development of scientific research career, molecular pump should be the focus of the vacuum pump manufacturing industry development in our country.First of all, since the childhood molecular pump will build a complete series, and research and development of compound molecular pump, traction and low molecular pump, to meet the needs of different occasions.
6. Dry vacuum pump
Foreign dry vacuum pump market growing, the main drive from the semiconductor industry, chemical industry, the rapid development of the film industry.In Japan, the semiconductor industry has fully use dry vacuum pump instead of oil sealed mechanical vacuum pump , more than 45% in Europe and the semiconductor industry with dry vacuum pump instead of mechanical pump oil seal type, greatly improving the product performance and quality.In order to meet the requirements of different applications and different working condition, abroad have multilevel roots vacuum pump, multistage rotary type vacuum pump, roots vacuum pump, the liquid type vacuum pump, reciprocating piston vacuum pump and turbine type oil-free vacuum pump, etc.Extreme pressure from 10 pa ~ 10-2 pa, pumping speed from 20 m3 / h ~ 500 m3 / h.According to statistics, at present the domestic application of dry pump, less than 1% of the domestic semiconductor industry with all dry pump imported from abroad, the price is very expensive.Therefore, our country should vigorously dry pump is developed, and the dry pump as a new economic growth point vacuum industry in China.