Air volume adjustable draught fan based on fan blade angle adjusting

Abstract

The invention discloses an air volume adjustable draught fan based on fan blade angle adjusting. An impeller is included, and a plurality of fan blades are connected to the impeller through connectionpieces; the impeller forms a cavity with a left side opening; a plurality of bosses which are uniformly distributed along the circumference are formed on the outer wall of the impeller; cone holes communicating with the cavity are formed in the bosses; each fan blade comprises a blade body and a cone table; step holes with the exterior large and the interior small are formed in the cone tables; the cone tables are inserted in the cone holes in a sleeved manner; each connection piece comprises a base table; a plurality of step through holes which are through in the radial direction are formedin the base tables; step columns are connected in the step through holes in a sleeved manner; a threaded hole with an opening in the outer side is formed in the small end portion of each step column;the threaded holes are in screwed connection with one end of screws; and the other end of each screw passes through a stretch-out end of a small end hole of the step hole of the corresponding flan blade to be fixedly provided with an eccentric round table, and the eccentric round tables are eccentrically arranged at the other ends of the screws. According to the air volume adjustable draught fan based on fan blade angle adjusting, by adjusting the angle of the fan blades, the ventilating amount of the draught fan is changed, and fan blade angle adjusting is easy and fast.

Description

technical field [0001] The invention relates to the technical field of fans, in particular to a fan with adjustable air volume based on adjusting the angle of fan blades. Background technique [0002] The fan has a wide range of uses and is often used in various places that require cooling and ventilation. The impeller in the existing fan has a fixed blade angle and cannot be adjusted, so one impeller can only meet the requirements of one working condition. In the actual use process, due to the complex working environment, the required ventilation volume and wind pressure are also different. In order to ensure that the fan is in the best working state, it is necessary to use the impeller with appropriate parameters. Not only the equipment replacement It is troublesome, and it also increases the cost burden and reduces the effective utilization rate of the machine. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of th...

AI Technical Summary

Problems solved by technology

[0002] The fan has a wide range of uses and is often used in various places that require cooling and ventilation. The impeller in the existing fan has a fixed blade angle and cannot be adjusted, so one impeller can only meet the requirements of one working condition.

In the actual use process, due to the complex working environment, the required ventilation volume and wind pressure are also different. In order to ensure that the fan is in the best working state, it is necessary to use the impeller with appropriate parameters. Not only the equipment replacement Trouble, but also increases the cost burden, reduces the effective utilization of the machine

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