Patent ID: 9556883
Date: 2017-01-31
CPC Classifications: F04D,F05D

Claim:
1. An inlet guide vane device having a central axis and comprising: a first base having at least one first support groove and at least one guide groove, the at least one first support groove extending along a radial direction of the central axis, and the at least one guide groove being located in the first support groove; a guide sleeve disposed on the at least one first support groove in a manner that the guide sleeve is capable of moving along the radial direction, wherein the guide sleeve has a sliding sleeve, an upper guide post and a lower guide post, the sliding sleeve has a through hole extending along the radial direction, the upper guide post and the lower guide post pass through the sliding groove, and the lower guide post is movably disposed on the guide groove; a blade, wherein one end of the blade is connected to a shaft, the outer surface of the shaft has two spiral grooves, the blade is rotatably disposed through the through hole of the guide sleeve, the two spiral grooves match the upper guide post and the lower guide post respectively, and the blade extends from the shaft to the central axis; a second base disposed on the first base and having an annular groove surrounding the central axis, wherein the blade is between the second base and the first base; a transmission disk disposed between the annular groove and the guide sleeve, wherein the transmission disk has a guide groove, the distance between one end of the guide groove to the central axis is different from the distance between the other end of the guide groove to the central axis, and the upper guide post is movably disposed on the guide groove; and an actuator connected to the transmission disk for driving the transmission disk to rotate and thus driving the guide sleeve to move back and forth, so that the upper post and the lower post drive the blade to rotate in order to open or close the blade.