Two requirements for selecting water ring vacuum pump
Screw rotor profile of oil-free screw vacuum pump
Domestic experts and scholars in the vacuum industry have long recognized that oil-free screw vacuum pump is a dry vacuum pump with broad application prospects and huge market potential. As a kind of low vacuum pump, oil-free screw vacuum pump has the characteristics of no oil pollution, strong ability to remove water vapor and solid dust particles compared with traditional oil seal pumps such as rotary vane pump and slide valve pump; compared with liquid seal pumps such as water ring pump, screw pump has the characteristics of high vacuum degree, low energy consumption, no waste liquid when pumping soluble steam; compared with claw pump and multi-stage roller pump Compared with other dry vacuum pumps, such as z-pump and vortex pump, screw pump has the characteristics of wide pumping speed range, simple and compact structure, no friction of pumping cavity components and long service life.
The screw rotor is the most critical part of the screw vacuum pump, which directly determines the working performance and service life of the pump. Its manufacturing cost accounts for nearly half of the total cost of the whole screw pump. The design and manufacture of screw rotor is one of the key technologies in the production of screw pump. It is also a common technical problem in the development of screw vacuum pump in domestic enterprises. Because the design theory of the screw rotor of the screw vacuum pump is not mature enough, and there are technical confidentiality factors, the public information about the design of the screw rotor of the screw vacuum pump is very rare. Researchers and technicians engaged in the development and research of screw vacuum pump in different units in China mostly start from the most basic principle, carry out research work, find and solve technical problems encountered in the development work, which restricts the development and production speed and level of domestic screw vacuum pump.
