Roots blowers principle operation

Roots blower principle

Roots blower is one of the types of positive displacement blower, have two three-blade impeller in the chassis and wallboard relative rotation in the sealed space, because each impeller is involute, or epicycloid envelope, three of each impeller blades are the same, at the same time two impeller is exactly the same, thus greatly reduce the processing difficulty. The impeller in the processing of CNC equipment, to ensure that the two impeller in the center of the case of the same distance, no matter what position the two impeller rotation, can maintain a certain small gap, so as to ensure the gas leakage in the allowable range.

Two opposite rotating impeller, the impeller and impeller, the impeller and casing, impeller and minimum clearance between wall panel, so that the air inlet formed the vacuum state, under the action of atmospheric pressure air into the intake cavity, and then, two of each impeller blade with panels, chassis form a sealed cavity, the air inlet chamber in the process of rotating impeller, seal chamber continuously formed by two blades to exhaust cavity, and because the exhaust chamber impeller are mutually meshing, thus the air squeeze out between the two blades, so running continuously, air is continuously from the inlet to the outlet, This is the whole process of roots fan.

Roots blower composition

Roots fan by: housing, wall board, impeller, fuel tank, muffler five major components.

Housing: the main support (wall board, impeller, muffler) and fixed role.

Wall board: mainly used to connect the housing and impeller, and support the rotation of the impeller, and play the end seal effect.

Impeller: is the rotating part of roots fan, divided into two blades and three blades, but because of the three blades than the two blades of the gas pulsation is smaller, noise

Smaller, more stable operation and many other advantages, has gradually replaced the two-blade roots fan.

Oil tank: mainly used for storing lubricating oil used to lubricate gears and bearings.

Muffler: used to reduce the noise caused by the pulsation of air flow in and out of roots fans.

Roots blower characteristics

Due to the adoption of the three-blade rotor structure and the reasonable structure of the inlet and outlet of the shell, the fan has low vibration and low noise.

Impeller and shaft for the overall structure of the impeller without wear, the fan performance is permanent, can be long-term continuous operation.

The fan volume utilization ratio is large, volume efficiency is high, and the structure is compact, the installation mode is flexible.

The machine type is complete, can satisfy the different user different use need.

Roots blowers principle operation