CN207111476U - Magneto with low noise efficient fan - Google Patents

Abstract

It the utility model is related to a kind of magneto with low noise efficient fan, including magneto body, the rotation shaft rear end of the magneto body passes the rear end cap of magneto and is connected with axle sleeve, if dry plate internal helicoid fan blade is arranged at intervals with the periphery of the axle sleeve, the periphery of internally positioned spiral fan blade is provided with the first annular skeleton for being fixedly connected with the outer of internal helicoid fan blade and internal air channel being formed between axle sleeve, if dry plate external helicoid fan blade is arranged at intervals with the periphery of the first annular skeleton, the second ring skeleton for being fixedly connected with the outer of external helicoid fan blade and external air channel being formed between first annular skeleton is additionally provided with positioned at the periphery of external helicoid fan blade.The magneto is not only simple in structure, and effectively high compared with low noise, radiating efficiency.

Description

Permanent magnet motor with low-noise high-efficiency fan

technical field

The utility model relates to a permanent magnet motor with a low-noise and high-efficiency fan.

Background technique

The motor belongs to ordinary machinery with mechanical transmission. Due to the high noise of the original motor cooling fan blade, it cannot meet the requirements in many applicable fields, and the original ordinary motor fan blade usually adopts the traditional vertical type, and a fan cover is installed on the motor shell. The area of the blade is large, and when the blade rotates, a large area of turbulent air will be formed inside the wind cover. Most of the wind force is useless, and only a part of it is blown out through the outlet at one end of the wind cover, and the blown air is also in a turbulent state, which can really enter the motor There is very little air in the casing for heat dissipation, that is, there is a large amount of heat dissipation power loss, resulting in low motor efficiency, and because the turbulent air in the windshield and the thin-walled windshield form a blast resonance, there is a roar in the windshield, and the noise is extremely high . For this reason, a permanent magnet motor with a low-noise high-efficiency fan is required.

Contents of the invention

The purpose of the utility model is to provide a permanent magnet motor with a low-noise and high-efficiency fan, which not only has a simple structure, but also has low noise and high heat dissipation efficiency.

The technical scheme of the utility model is: a permanent magnet motor with a low-noise and high-efficiency fan, including a permanent magnet motor body, the rear end of the rotating shaft of the permanent magnet motor body passes through the rear end cover of the permanent magnet motor and is connected with a shaft A sleeve, the circumference of the shaft sleeve is provided with a number of internal spiral blades at intervals, and the outer periphery of the internal spiral blades is provided with a fixed connection with the outer edge of the internal spiral blades and forms an internal air passage between the shaft sleeve. The first ring-shaped frame, the circumference surface of the first ring-shaped frame is provided with several pieces of external spiral blades at intervals, and the outer periphery of the external spiral blades is also provided with a fixed connection with the outer edge of the external spiral blades and connected with the first annular The second ring frame of the external air duct is formed between the frames.

Further, the rear end cover of the permanent magnet motor is provided with ventilation holes at intervals for the wind formed by the internal spiral fan blades to pass through, and the rotor circumference of the permanent magnet motor is provided with axial cooling ventilation holes at intervals. Air outlet holes are also arranged at intervals on the front cover.

Further, the rear end of the permanent magnet motor is detachably connected with a windshield, and the rear end surface of the windshield is arranged with air inlet holes at intervals, and an external The gap of the wind output of the air duct.

Further, cooling fins are arranged at intervals on the periphery of the housing of the permanent magnet motor.

Further, 3 to 5 inner spiral fan blades are arranged at intervals on the circumferential surface of the shaft sleeve, and four outer spiral fan blades are arranged at intervals on the circumferential surface of the first annular frame.

Further, the included angle between the inner helical blade and the axis of the rotating shaft is 60°, and the included angle between the outer helical blade and the axis of the rotating shaft is 73.5°.

Further, the direction of the internal air duct is parallel to the axis of the rotating shaft, and the external air duct is inclined 3-5° towards the direction of the permanent magnet motor.

Compared with the prior art, the utility model has the following advantages:

1. The permanent magnet motor not only has a simple structure and good practical effect, but also effectively reduces noise and improves heat dissipation efficiency;

2. The fan blade of the permanent magnet motor adopts the aircraft propeller structure, so that the fan blade setting area is only 1/3 of the original fan blade with the same power; the inner spiral fan blade and the outer spiral fan blade are respectively equipped with air ducts, and the outer air duct Tilt 3~5° towards the direction of the motor, so that the temperature of the motor casing can be effectively cooled, and the effect is good;

3. The use efficiency of the permanent magnet motor is improved, the running time is greatly increased, and compared with the original 2.2KW motor, the noise is reduced from 73 decibels to 55 decibels, the power consumption of the cooling fan is reduced from 38W to 10W, and the motor efficiency is increased by 1.4%. ;

4. The fan can form a stable laminar flow in the fan hood through the internal spiral fan blade and the external spiral fan blade, which can improve the utilization rate of wind energy and effectively reduce noise.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the fan of the present utility model;

Fig. 3 is the A-A sectional view of Fig. 2 of the present utility model;

Fig. 4 is a schematic diagram of the angle between the outer blade and the axial direction of the utility model;

Fig. 5 is a schematic diagram of the included angle between the inner blade and the axial direction of the utility model;

In the figure: 1-shaft sleeve 2-inner spiral wind blade 21-included angle 3-inner air duct 4-first annular framework 5-external spiral air blade 51-included angle 6-external air duct 7-second annular framework 71 - included angle 10 - permanent magnet motor 11 - rear end cover 12 - front end cover 13 - rotating shaft 14 - wind cover 15 - cooling fin 16 - housing.

Detailed ways

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific examples are given together with the accompanying drawings and described in detail as follows, but the present invention is not limited thereto.

Refer to Figure 1 to Figure 5

A permanent magnet motor with a low-noise and high-efficiency fan includes a permanent magnet motor body 10, the rear end of the rotating shaft of the permanent magnet motor body passes through the rear end cover 11 of the permanent magnet motor and is connected with a shaft sleeve 1, the shaft A plurality of inner spiral fan blades 2 are arranged at intervals on the circumferential surface of the sleeve, and a first annular ring which is fixedly connected with the outer edge of the inner spiral fan blade and forms an inner air duct 3 between the fixed seat is arranged on the outer periphery of the inner spiral fan blade. Skeleton 4, so that the wind formed by the internal helical fan blades can cool down the inside of the permanent magnet motor. Several pieces of external spiral blades 5 are arranged at intervals on the circumferential surface of the first annular skeleton, and a fixed connection with the outer edge of the external spiral blades is also provided on the outer periphery of the external spiral blades and formed between the first annular skeleton. The second ring frame 7 of the external air channel 6, so that the wind formed by the external helical fan blades can cool the shell of the permanent magnet motor.

In this embodiment, the rear end cover 11 of the permanent magnet motor 10 is provided with ventilation holes for the wind formed by the internal spiral fan to pass through, and the rotor circumference of the permanent magnet motor is provided with axial cooling ventilation holes at intervals. The front end cover 12 of the permanent magnet motor is also provided with air outlets at intervals, so that the wind generated by the internal spiral blades can effectively enter the inside of the motor to ensure the cooling effect of the internal components of the motor, thereby improving the service life and power of the permanent magnet motor.

In this embodiment, the rear end of the permanent magnet motor is detachably connected with a windshield 14, and the rear end surface of the windshield is provided with air inlet holes at intervals. A gap is provided for the wind output of the external air duct, and cooling fins 15 are also arranged at intervals around the casing periphery of the permanent magnet motor. So that the wind generated by the external helical fan blades cooperates with the cooling fins and the grooves between the cooling fins to effectively ensure the external cooling of the motor.

In this embodiment, taking the 2.2KW of the 2-stage motor as an example, the internal spiral wind blade and the external spiral wind blade adopt the aircraft propeller structure respectively, so that the installation area of the wind blade is only 1/3 of the original wind blade with the same power, and the wind speed is improved. leaf power.

In this embodiment, 3 to 5 internal spiral fan blades are arranged at intervals on the circumferential surface of the fixing seat, and four external spiral fan blades are arranged at intervals on the circumferential surface of the first annular frame, so as to fully ensure the Structural strength.

In this embodiment, the included angle 21 between the inner helical fan blade and the axis of the rotating shaft is 60°, so as to effectively generate a stable laminar flow and ensure the wind energy supplied to the permanent magnet motor for cooling. The included angle 51 between the external helical fan blade and the axis of the rotating shaft is 73.5°, so as to ensure sufficient unidirectional laminar flow wind energy supply for the cooling of the permanent magnet motor housing.

In this embodiment, the direction of the internal air duct is parallel to the axis of the rotating shaft, and the included angle 71 between the circumferential surface of the second ring frame and the circumferential surface of the permanent magnet motor housing is 3 to 5 °, so that the external air duct is inclined 3~5° towards the direction of the permanent magnet motor, so that the wind generated by the external spiral fan blade can effectively act on the permanent magnet motor shell, preventing the generated wind from reaching the permanent magnet due to diffusion Front of the motor housing.

The working principle of the permanent magnet motor: through the cooperation of the external spiral fan blade and the internal spiral fan blade, it not only satisfies the internal cooling of the motor, but also satisfies the external cooling of the motor. The two-pronged approach ensures that the temperature of the motor is at normal temperature and prevents the motor from working due to high temperature. A case of reduced efficiency.

The above descriptions are only preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the patent scope of the present utility model shall fall within the scope of the present utility model.

Claims (7)

1. A permanent magnet motor with a low-noise high-efficiency fan, comprising a permanent magnet motor body, is characterized in that the rear end of the rotating shaft of the permanent magnet motor body passes through the rear end cover of the permanent magnet motor and is connected with an axle sleeve, A number of internal spiral blades are arranged at intervals on the circumferential surface of the shaft sleeve, and the outer periphery of the internal spiral blades is provided with a first fixed connection with the outer edge of the internal spiral blades and forms an internal air duct with the shaft sleeve. An annular frame, a plurality of external spiral blades are arranged at intervals on the circumferential surface of the first annular frame, and a fixed connection with the outer edge of the external spiral blade is also provided on the outer periphery of the external spiral blade and between the first annular frame. Form the second ring skeleton of the external air duct between them. 2. The permanent magnet motor with low-noise and high-efficiency fan according to claim 1, characterized in that, the rear end cover of the permanent magnet motor is provided with ventilation holes for the wind formed by the internal spiral fan blade to pass through at intervals, The circumference of the rotor of the permanent magnet motor is provided with axial cooling ventilation holes at intervals, and the front end cover of the permanent magnet motor is also provided with air outlet holes at intervals. 3. The permanent magnet motor with low-noise and high-efficiency fan according to claim 1 or 2, characterized in that, the rear end of the permanent magnet motor is detachably connected with a windshield, and the rear end surface of the windshield is arranged at intervals A gap for the wind output of the external air duct is provided between the air inlet hole, the wind cover and the outer surface of the permanent magnet motor housing. 4. The permanent magnet motor with a low-noise and high-efficiency fan according to claim 3, wherein cooling fins are arranged at intervals around the casing of the permanent magnet motor. 5. The permanent magnet motor with a low-noise and high-efficiency fan according to claim 1, 2 or 4, wherein 3 to 5 internal spiral fan blades are arranged at intervals on the circumferential surface of the sleeve, and the first Four external helical fan blades are arranged at intervals on the circumferential surface of a ring frame. 6. The permanent magnet motor with a low-noise and high-efficiency fan according to claim 1, wherein the angle between the inner helical fan blade and the axis of the rotating shaft is 60°, and the outer helical fan blade and the rotating shaft The included angle of the shaft axis is 73.5°. 7. The permanent magnet motor with a low-noise and high-efficiency fan according to claim 6, wherein the direction of the internal air duct is parallel to the axis of the rotating shaft, and the external air duct is inclined to the direction of the permanent magnet motor 3~5°.