Variable-frequency axial flow fan

Abstract

The invention relates to the technical field of axial flow fans, in particular to a variable-frequency axial flow fan. The fan comprises a cylinder, a motor, a supporting rod, fan blades and a protection window. The outer side of the motor is sleeved with a ring sleeve. A cavity is formed in the ring sleeve, and supporting rods are evenly and fixedly connected to the outer side wall of the ring sleeve. The inner wall, close to the motor, of the cavity is evenly and fixedly connected with fixing blocks. The end faces, away from the motor, of the fixing blocks are fixedly connected with supporting springs. Connecting blocks are uniformly and fixedly connected in the cylinder. The cavity is arranged in the ring sleeve, and the ring sleeve is matched with a fixing spring and the fixing blocks in the ring sleeve to fix the motor, so that the purpose that the ring sleeve absorbs the vibration of the motor is achieved, and the output shaft of the motor is prevented from being damaged due to vibration; meanwhile, the variable-frequency axial flow fan has the effect of being capable of adapting to motors with different diameters, and the selectivity of designing the power of the variable-frequency axial flow fan is improved.

Description

technical field [0001] The invention relates to the technical field of axial flow fans, in particular to a variable frequency axial flow fan. Background technique [0002] Axial flow fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas; axial flow fan has the characteristics of low pressure head and large flow, because axial flow fan has small volume and simple installation compared with centrifugal fan, it is widely used in the national economy Various fields, such as electric tools, construction machinery, air conditioners, electric power, metallurgy, energy, medicine and health, etc., have great application value and broad market prospects; the motor and blades of the axial flow fan will vibrate in actual application, The transmission of vibration to the cylinder and the protective net will cause noise and noise pollution; at the same time, the vibration on the motor and fan blades will cause the output shaft of the motor to b...

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Problems solved by technology

[0002] Axial flow fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas; axial flow fan has the characteristics of low pressure head and large flow, because axial flow fan has small volume and simple installation compared with centrifugal fan, it is widely used in the national economy Various fields, such as electric tools, construction machinery, air conditioners, electric power, metallurgy, energy, medicine and health, etc., have great application value and broad market prospects; the motor and blades of the axial flow fan will vibrate in actual application, The transmission of vibration to the cylinder and the protective net will cause noise and noise pollution; at the same time, the vibration on the motor and fan blades will cause uneven stress on the output shaft of the motor and damage it, thereby shortening the service life of the motor

[0003] For example, a Chinese patent with the application number CN201922027337.2 discloses a pipe axial flow fan support; including a pipe, a first shock absorber, a shock absorber support plate and a motor; the inner wall of the pipe is evenly equipped with a plurality of first shock absorbers The shock base and the shock absorbing support plate; the two ends of the pipeline are uniformly provided with connection holes; the first shock absorber includes a lower base, an upper support and a spring; the lower base is connected with the inner wall of the pipeline by screws, and the The two ends of the lower base are symmetrically provided with counterbore holes, the center of the counterbore hole is provided with a fixed rod on the lower base, and the middle part of the lower base is provided with a first sinker groove; Then, a first bump is provided under the upper support, and a plurality of installation holes are evenly provided above the upper support; this technical solution provides a pipeline axial flow fan support, which can eliminate the vibration force generated by the motor itself and noise, avoiding damage to the pipe connecting bolts; however, in this technical solution, there are many parts to be installed, and the installation steps are cumbersome. At the same time, the installation base can only adapt to one type of motor, which causes the limitation of the solution

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