Local ventilator for coal mine application and provided with transmission cases

Abstract

A local fan for coal mines with a transmission box, which is composed of a current collector, a primary main body, a secondary main body and an outlet joint, and bolts are used to connect each part, and it is characterized in that: the primary main body, The secondary main body is composed of an impeller, a main engine casing, a transmission group, and a motor casing. The transmission group is composed of a transmission box, a coupling, and a motor. The motor shaft and the main shaft of the transmission box are connected by a coupling; the transmission box It consists of a main shaft, an outer small cover, an outer bearing, an end cover, an inner small cover of an outer bearing, an outer small cover of an inner bearing, an inner bearing, a support plate, an inner small cover of an inner bearing, and a box; the beneficial effect is that the lubricating performance is significantly improved, The added coupling eliminates the axial force, radial force and unbalanced force when the impeller rotates, avoiding the occurrence of bearing burnout and bearing cage loosening; compared with ordinary direct-coupled fans, its service life The extension is doubled, which effectively guarantees the need for continuous ventilation underground.

Description

technical field [0001] The invention relates to a roadway local ventilator for coal mine excavation, in particular to a coal mine local ventilator with a transmission box. Background technique [0002] Mine ventilation system is an important part of coal mining and the basic guarantee for safe production in mines. The role of local ventilators in coal mines is to continuously deliver fresh air to the underground working face during the mine production process, supplying personnel to breathe and dilute And remove all kinds of toxic and harmful gases and mineral dust underground, create a good working environment, and ensure the health and safety of underground operators. [0003] At present, local fans for coal mines produced and used in China mainly include FBD, FB, FBDC and other series. The impellers of these fans are directly installed on the motor shaft without couplings. and unbalanced force, leading to the deterioration of the working environment of the motor bearing;...

AI Technical Summary

Problems solved by technology

[0003] At present, local fans for coal mines produced and used in China mainly include FBD, FB, FBDC and other series. The impellers of these fans are directly installed on the motor shaft without couplings. and unbalanced force, leading to deterioration of the working environment of the motor bearing; therefore, during the operation of the fan, the phenomenon of bearing burnout and bearing cage falling apart occurs from time to time; affecting the normal ventilation of the mine

In recent years, this problem has become more and more prominent. Although various motor manufacturers have improved the motor bearings to varying degrees, this problem has not been significantly improved.

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