Energy-saving type mine main ventilator diffuser

Abstract

The diffuser of mine ventilator solves the problems in existing diffusers that internal eddy current area is too large and there is back air-suction phenomenon at inner side of outlet section. The streamline type internal and external outline of the diffuser meets a specific equation and is tangent to the lead line of the external outline and the extended line of the internal and the external outline. The length of the extended line of the internal and the external outline makes the section enlargement coefficient reach 2.361. The invention can ensure that it will not produce back air-suctionphenomenon at outlet section in range of 6m / s- 33m / s of inlet rated wind speed of a fan, which can ensure higher energy recovering efficiency to realize energy-saved operation of mine ventilator.

Description

Energy-saving mine main ventilator diffuser technical field The invention belongs to the technical field of mine ventilation, and in particular relates to a mine main ventilator diffuser. Background technique The current mine main ventilator diffusers mainly include vertical diffusers, 60-degree inclined diffusers, 45-degree inclined improved diffusers, and traditional streamlined diffusers. There are two main problems in these types of mine main ventilator diffusers: on the one hand, the vortex area inside the diffuser is too large, which increases the structural resistance of the diffuser and reduces the recoverable kinetic energy value of the main ventilator; On the one hand, there is a back-suction phenomenon on the inner side of the diffuser outlet section. For example, a 60-degree inclined diffuser has about 1 / 3 of the air suction area on the air outlet section, which relatively reduces the air outlet section of the diffuser. The inhaled air increases the wind speed...

AI Technical Summary

Problems solved by technology

There are two main problems in these types of mine main ventilator diffusers: on the one hand, the vortex area inside the diffuser is too large, which increases the structural resistance of the diffuser and reduces the recoverable kinetic energy value of the main ventilator; On the one hand, there is a back-suction phenomenon on the inner side of the diffuser outlet section. For example, a 60-degree inclined diffuser has about 1 / 3 of the air suction area on the air outlet section, which relatively reduces the air outlet section of the diffuser. The inhaled air increases the wind speed of the effective air outlet section, and the kinetic energy loss at the outlet is large, which reduces the energy recovery efficiency of the diffuser and even increases the energy consumption of the main ventilator

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