The usual vacuum system cannot meet the
requirements of clean oil and corrosion resistance, a large number
of oil vacuum system was replaced by oil free clean vacuum system,
dry oil-free vacuum products, clean and environmental protection
would accelerate alternative water ring pump, reciprocating pump,
mechanical pump of oil seal type. Screw vacuum pump belongs to the
type of non-contact dry pump, it is a kind of ideal pump that is
appears in the early ***0s. The advantages are wide range of
pumping speed, simple and compact structure, suction cavity
components without friction, long life, low energy consumption,
without oil pollution, etc. Screw vacuum pump is a studio that composed of
a pair of parallel spiral rotor and the pump body, there is no
friction and keeps a certain gap between the rotors and the pump
body, the two rotors and the pump body formed a sealed cavity. When
the rotors rotate, the gas in the sealing chamber is continuously
pushed to the exhaust port. Screw vacuum pump does not need oil to
lubricate and water to sealed, pump cavity completely without oil,
so the screw vacuum pump is dry vacuum pump oil. It is updated
products of a reciprocating pump, water ring pump, oil seal type
vacuum pump, rotary vane vacuum pumps, roots pump
unit. Screw vacuum pump of a guide process is
equivalent to the level of pump, a plurality of guide screw vacuum
pump the equivalent of multistage pump series, relative to
multistage tandem dry vacuum pump（the claw type vacuum pump, multi-stage Roots
vacuum pump）.The gas pressure of the suction is higher than
that of the discharge source. Such design makes the discharge of
gas will not be mixed with oil material. The power of the motor is
transmitted to the active shaft through the coupling device, and
the main rotation shaft is transmitted to the driven shaft through
the timing gear. 2．Structure
principle and characteristics
●Screw Rotor Rotor is divided into uniform pitch and
variable pitch of two kinds of structure. The type of LG is uniform
pitch. The type of LGP is variable pitch. The rotor is made of five
axis machining center precision machining
center，After machining, the dynamic balance test of
precision G1 level was adopted, to guarantee equipment
performance。Screw rotor material according to different
working condition is composed of the following three
categories： A、High
NI - P alloy plating spherical graphite cast steel surface,
suitable for general gas medium or small acid alkali
medium. B、**6L
and other stainless steel materials, suitable for stainless steel
is not a strong reaction of the acid and alkali
media. C、TA,
TC series of titanium material, suitable for most of the medium of
acid. ●Timing Gears Equal proportional
gearis one of the most important parts of screw
pump，it can make the screw rotor and the rotor to
keep a fixed gap. ●Bearings Fixed end bearing is SKF
double row thrust ball bearing.Extended end bearing is high load roller
bearings.These bearings are able to support high speed
and high load operation. At the same time, it can keep the gap
between gears and rotors. ●Shaft Seal The sealing device is composed of a multi lip
dry stainless steel rotary sealing and sealing
compound.This kind of composite sealing device can
prevent the oil material from the former end plate into the shell,
and prevent the pump from the pump into the bearing lubrication
chamber, and prolong the service life of the pump and reduce the
maintenance and improve the reliability of the
equipment. ●Lubricating Oil Vacuum pump gear box used oil
lubrication, oil should be added to the oil more than half of the
mirror. If the oil is too little，Bearings, gears and mechanical seal will suffer
from abnormal friction.Therefore, when the pump is not in working,
please check the oil quantity and condition of oil pollution,
in order to decide whether to need to increase or replace the
lubricating oil. 3.Features： 1. Clean and environmental
protection：This is dry vacuum pump; in the working chamber
without lubricate oil. It is in favor of recycling medium, so can
acquire the clean vacuum. Without waste oil and waste water to be
discharged in working, it is environmental protection vacuum
pump. 2. High
vacuum：Rotor lines profile optimization
design，The ultimate pressure of one LG
pump≤1pa，LGP≤5Pa.It has large swept volume in the high
vacuum area, high efficiency and lower power
consumption.。 3.
Anti-corrosion（patent
technology）：Material of the flow passage components has
many choices. Such as titanium alloy, stainless steel, nodular cast
iron and so on. Also it can be sprayed by nano ceramic and NIP
alloy anticorrosive coating. 4. It can pump condensable gas and the
gas with little dust 5. The special design to shaft seal. It
can effectively prevent the gear cavity lubricating oil and the
pump cavity medium seepage polluting each other (patent
technology). 6. The type of LGP is energy saving and
low noise (patent technology): When **0L/S screw pump working, the
power just 7.5 KW, and noise is lower than *9 dB without
muffler. 7. Anti overload
design：Variable pitch screw pump with the design of
variable frequency speed control can be started and run at
any pressure。 8. Smooth
operation 9. Highly standard
configuration *0. Accessories
complete *1. Different industries and different
design *2. Quality and sound spare parts
supply 4. Purpose and
scope 1.Electrotechnics：Transformer,
mutual inductor, epoxy resin vacuum casting, capacitor vacuum oil
immersion, Vacuum pressure impregnation. 2.Chemical
industry、pharmacy：Product distillation, dry, degassing, material
handling. 3.Industrial
furnace：vacuum brazing、vacuum sintering, vacuum annealing, vacuum
pressed gas quenching, etc
4.Vacuum coating：Vacuum vapor plating, vacuum magnetron
sputtering deposition, continuous coating film
winding,ion plating, etc 5.Metallurgy：Special steel smelting, vacuum induction
furnace, vacuum desulfurization, degassing.
6.Aviation、spaceflight。 7.Dry：Voltage transformation vacuum dry, wood drying,
Kerosene air box drying, etc.
