ZJ - The roots vacuum pump applications - 5000

what ZJ had - 10000 the overall structure of the roots vacuum pump is decided by the arrangement of the pump body. At present, the overall structure of the roots vacuum pump at home and abroad generally has three types:

vertical structure of inlet and outlet level Settings, facilitate pipe assembly and connection. However, the pump high center of gravity, high-speed stability, so this type of pump is mainly used for small pump.

, above the entrance to the horizontal pump export below. Sometimes, vacuum system to facilitate pipeline installation and connection, vent can from the horizontal connections, the air intake and exhaust direction perpendicular to each other. At this point, the vent can be opened from the left or the right direction, and in addition to one end of the exhaust pipe, another end is blocked or connected to the bypass valve. When the pump low center of gravity, high-speed stability is good. In general, large and medium-sized pump all adopt the structure.

ZJ - The two 2500 roots vacuum pump rotor axis perpendicular to the horizontal installation. The structure of the assembly clearance is easy to control, the rotor assembly is convenient, pump cover an area of an area small. But the pump high center of gravity, gear, dismantling inconvenient, lubrication mechanism is relatively complex. Only found in the foreign products.

5000 roots vacuum pump drive for two of the roots vacuum pump rotor through a pair of high precision gear relative to run synchronously. The drive shaft through the shaft coupling and motor connection. Basically has the following two types of transmission structure arrangement:

a motor and gear is located in the same side of the rotor is shown in figure. Driven by the end of the motor rotor gear drive directly, so the active rotor shaft torsional deformation is small, the gaps between the rotor will not change by drive shaft torsional deformation is bigger, so the gap between the rotor is uniform in the operation process.

the biggest drawback of this kind of drive are: a. Three shaft bearings, increased the difficulty of processing and assembling of the pump, removal and adjustment of the gear is not convenient; The center of gravity of the overall structure is not symmetrical, pump to motor and gear box.

the other is a motor and drive gear installed on both sides of the rotor, respectively. This form makes the overall structure of the pump is symmetrical, but has a lot to the torsional deformation of the drive shaft. In order to ensure uniform rotor in the process of running clearance, shaft should have enough rigidity, the connection between shaft and rotor should tighten ( At present, the rotor and shaft welding or casting as a body structure) 。 This structure is very easy to tear open outfit therefore has been widely used.

quick start, low power consumption, low running cost of protection, pumping speed, high efficiency and the pumping gas contains a large amount of water vapor and dust is not sensitive, in 100 - 1 Pa pressure range large pumping speed, quickly eliminate the sudden release of gases.

this pressure level between the scattered oil seal mechanical vacuum pump and pump is good. Spread as a result, it often in series between the pump and mechanical vacuum pump oil seal, in order to improve the pumping capacity of the pressure gauge on both ends. At this time it is also known as mechanical booster pump.

in a wide range of pressure inside the larger pumping speed;

good rotor geometry symmetry, small vibration, run the turbulence. Between the rotor and clearance between rotor and shell, these do not need to be smooth clearance and friction loss is small, thus greatly reduces the driving power and achieve the higher speed.

do not need oil seal and smooth pump chamber, thereby increasing the purification of oil on the vacuum system of steam;

pump room without shrinkage valve or exhaust valve. Simple and compact structure, is not sensitive to pumping gas of the dust and water vapor.

contraction low contrast, hydrogen extraction result is poor.

what ZJ had - 300 roots vacuum pump has been in the petroleum, chemical, plastics, pesticides, steam turbine rotor dynamic balancing, aerospace space simulation devices such as the long-term test, should be vigorously promoted application in our country.

at the same time, the roots vacuum pump is widely used in the vacuum metallurgy, vacuum distillation, refining, degassing and rolling in the vacuum concentration.