Explosion-proof roots blower

Abstract

The invention discloses an explosion-proof roots blower, which structurally comprises a machine shell, a first sealing part, wallboards, side plates, a main fuel tank, an auxiliary fuel tank, a support bearing seat, a locating bearing seat, a driving impeller part, a driven impeller part, a driving gear and a driven gear, wherein a second sealing part is arranged between the auxiliary fuel tank and a main shaft where the driving impeller part is positioned; when a first sealing part is sealed with packing, a shaft sleeve sleeves the main shaft, and three layers of forming packing are used between the shaft sleeve and the main shaft to form a seal; the shaft sleeve spans the side plates and the wallboards, wherein the shaft sleeve is in clearance fit with the side plates at the contact parts, and a group of semicircular slot-bottomed labyrinth seals are arranged at the corresponding positions of the shaft sleeve so as to form a dynamic seal; when the labyrinth seals are adopted at the sealed part, the shaft sleeve sleeves the main shaft, an arc-bottomed zigzag labyrinth seal is used between the shaft sleeve and the main shaft, and the shaft sleeve is made from copper alloy. The blower has the advantages of being good in sealing effect, long in sealing service life and stable and reliable in operation, and realizes the 'zero escape' characteristic of a conveying medium.

Description

technical field [0001] The invention relates to a blower, in particular to an explosion-proof Roots blower, which is suitable for conveying flammable and explosive gases. Background technique [0002] Existing Roots blowers are generally suitable for conveying non-flammable and explosive media, or flammable and explosive gases whose gas content is within the non-explosive limit. With the strengthening of environmental protection, the demand for flammable and explosive exhaust fans in the chemical industry is increasing. For the flammable and explosive tail gas discharged by equipment in some areas of the chemical industry, because it is the dynamic discharge of multiple devices, the specific content of various flammable and explosive gases in the dynamic exhaust tail gas cannot be confirmed. In order to avoid unnecessary losses, it is necessary Design an explosion-proof Roots blower. Due to the different treatment methods of chemical tail gas, there are different requireme...

AI Technical Summary

Problems solved by technology

To solve the problem of sparks caused by the contact friction between the impeller and the casing, the impeller and the end plate, and the sealing part of the fan shaft due to the failure of the existing Roots blower, and attention should be paid to the high pressure boost that requires flammable and explosive media in the shaft extension of the fan. Leakage at the end, causing pollution problems to the environment again

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