In Roots fan, sealing means is an indispensable. In a sense, a Roots fan seal is good or bad, determines the quality of this Roots fan good and fast. And how is the sealing of the Roots fan.

Roots fans are divided into many kinds of seals, now mainly mechanical seals. Mechanical seals are similar to ordinary seals in the form of seals, sealing devices are also based on the different parts of the use of different sealing means. In Roots fans, there are three main types of mechanical seals: closed wall plate - single mechanical seal, closed wall plate - four mechanical seals and open wall plate - four mechanical seals.

The sealing device of the closed wall panel-single mechanical seal is mainly as follows: the shaft end part uses the traditional mechanical seal, the rear part of the bearing seat uses the oil return groove or the skeleton oil seal, and the shaft end part mainly uses the labyrinth seal. The main features of the closed wall panel-single mechanical seal are: the conveyed gas may leak into the oil tank, but rarely leak to the atmosphere. When vacuum is drawn, oil may leak into the housing.

The main sealing device of the closed wall plate-four mechanical seal: the shaft end part uses the skeleton oil seal, the end of the bearing housing uses the mechanical seal, and the shaft end part mainly uses the labyrinth seal. Closed wall plate - four mechanical seal of its main features are: gas leakage is very small, mechanical seal can be a bearing lubricant cooling. Vacuum, oil is also difficult to leak into the casing.

The main sealing device of the open wall plate-four mechanical seal: the shaft end part uses the skeleton oil seal, the rear part of the bearing housing uses the oil return groove, and the shaft end part mainly uses the labyrinth seal. The main features of open wall panels - four mechanical seals are: gas leakage is very small, will not leak into the oil tank. The oil will not leak into the casing either.