Variable frequency motor cooling fan capable of preventing motor burnout

Abstract

The invention relates to the technical field of cooling fans, and discloses a variable frequency motor cooling fan capable of preventing motor burnout. The variable frequency motor cooling fan comprises a shell, a support column, a mounting block, fan blades and a protection assembly; the inner wall of the shell is fixedly connected with the support column; the outer wall of the mounting block is fixedly connected with the support column; the right side of the mounting block is movably connected with the protection assembly; and the fan blades are movably connected with the right side of the protection assembly. According to the variable frequency motor cooling fan capable of preventing motor burnout and a method provided by the invention, when a driving motor normally stops running and gradually decelerates until the driving motor stops running, an output shaft of the driving motor rotates reversely to enable a ball to enter a chute from an annular groove, so that an inner column moves leftwards, and a convex block is separated from a special-shaped block, therefore, the driving motor is protected, when the fan blades are blocked, an inner rod is blocked, at the moment, a connecting sleeve still bears rotating force from the driving motor, then the connecting sleeve overcomes the acting force of a jacking spring and continues to rotate, and the driving motor is prevented from being overloaded and burnt due to the fact that the fan blades are blocked.

Description

technical field [0001] The invention relates to the technical field of cooling fans, in particular to a cooling fan for a variable frequency motor and a method for preventing motor burnout. Background technique [0002] Cooling fans have a wide range of uses. With the rapid development of industry, the number of industrial production rooms in various places has increased sharply, and industrial production rooms are mostly subjected to heavy mechanical processing, and high-intensity mechanical equipment will generate a lot of heat, and it is cooled. has become an essential step. [0003] However, when industrial cooling fans use variable frequency motors to work, the phenomenon of motor burnout often occurs. This is because industrial cooling fans are mostly used in heavy machinery processing occasions. The friction of the blade shaft will cause the blade to be stuck in serious cases, so that the motor will be overloaded and burned. Moreover, the output shaft of the motor of...

AI Technical Summary

Problems solved by technology

[0003] However, when industrial cooling fans use variable frequency motors to work, the phenomenon of motor burnout often occurs. This is because industrial cooling fans are mostly used in heavy machinery processing occasions. The friction of the blade shaft will cause the blade to be stuck in serious cases, so that the motor will be overloaded and burned. Moreover, the output shaft of the motor of the existing cooling fan is directly connected to the blade, so that when the fan stops running, whether there is gravel It is not known that other substances will block it, so that once the fan is running, the motor will be overloaded, causing it to burn out

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