Adjusting mechanism for inlet guide blades of centrifugal blower

Abstract

The invention discloses an adjusting mechanism for inlet guide blades of a centrifugal blower. The adjusting mechanism comprises an inner volute, an outer volute, a shield cap, a front-section guide blade assembly and a rear-section guide blade assembly. During working, an actuator drives one of rear-section guide blade rotating shafts to rotate through a coupling, the rear-section guide blade rotating shaft rotates to drive a driving ring to rotate, accordingly, all the guide blade rotating shafts are driven to rotate, and the purpose of adjusting the rotating angle of the rear-section guideblades is achieved. According to the adjusting mechanism for the inlet guide blades of the centrifugal blower, a traditional single-blade flow guiding mode is broken through, by adopting the mode thatthe front-section guide blades are fixed and the rear-section guide blades rotate, adjusting of the tandem-cascade-type guide blades is achieved, and flowing separation of an air flow at the guide blades is weakened; and under the situation of ensuring adjustability of the flow direction and the flow amount of the air flow, the aerodynamic loss brought by the guide blades is reduced, the efficiency of the whole mechanism is improved, and energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of blowers, and in particular relates to an adjustment mechanism for inlet guide vanes of a centrifugal blower. Background technique [0002] The high-speed centrifugal blower adjusts the flow direction and flow rate of the airflow by adjusting the angle of the inlet guide vane. The fluid produces aerodynamic loss, which reduces the aerodynamic performance of the whole machine, and noise pollution is caused by the excessive separation of the blade surface. Therefore, it is necessary to weaken the flow separation at the inlet guide vane and improve the efficiency of the centrifugal blower. The existing practice is to change the plate guide vane to an airfoil guide vane, but changing to an airfoil guide vane does not improve the aerodynamic performance much, especially for the centrifugal blower with an S-shaped inlet channel, which reduces the aerodynamic loss at the guide vane Not obvious. Contents of the...

AI Technical Summary

Problems solved by technology

[0002] The high-speed centrifugal blower adjusts the flow direction and flow rate of the airflow by adjusting the angle of the inlet guide vane. The fluid produces aerodynamic loss, which reduces the aerodynamic performance of the whole machine, and noise pollution is caused by the excessive separation of the blade surface, so it is necessary to weaken the flow separation at the inlet guide vane and improve the efficiency of the centrifugal blower

The existing practice is to change the plate guide vane to an airfoil guide vane, but changing to an airfoil guide vane does not improve the aerodynamic performance much, especially for the centrifugal blower with an S-shaped inlet channel, which reduces the aerodynamic loss at the guide vane not obvious

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