CN214742324U

CN214742324U - Composite mixed flow cooling fan for motor

Info

Publication number: CN214742324U
Application number: CN202120326847.4U
Authority: CN
Inventors: 胡朝鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-16
Anticipated expiration: 2031-02-05

Abstract

The utility model provides a compound mixed flow radiator fan for motor, including axle sleeve, mounting disc and a plurality of blade, the middle part of mounting disc with the axle sleeve cooperation installation, the axle sleeve is installed with the main shaft cooperation of motor, can drive the mounting disc is followed the motor rotates, and is a plurality of the blade about the center of mounting disc is the array distribution, one side of blade with the internal surface of mounting disc is perpendicular to be connected, and follows the radial direction of mounting disc is stretched out by it, the opposite side of blade is gradually to being on a parallel with the bending of mounting disc internal surface direction. The utility model discloses radiator fan's blade root is centrifugal straight blade, and the outside is crooked gradually, and the transition is the axial-flow type, makes it combine in an organic whole with the big advantage of axial-flow type fan amount of wind high with the centrifugal fan amount of wind, guarantees sufficient amount of wind and wind pressure, improves the radiating efficiency of motor.

Description

Composite mixed flow cooling fan for motor

Technical Field

The utility model belongs to the technical field of radiator fan technique and specifically relates to a compound mixed flow radiator fan for motor is related to.

Background

An electric machine is an electrically powered device that converts electrical energy into mechanical energy. In the process of converting electric energy into mechanical energy, the motor always has a part of loss, which is expressed in the form of heat, so that the surface temperature of the motor is increased. Since the motor is not suitable for working at high temperature for a long time, manufacturers can equip the motor with a cooling fan when producing the motor. The used heat radiation fans are divided into the following parts according to the air flow direction of the blades: centrifugal fans and axial fans.

Centrifugal fans, whose blades are straight blades, arranged radially, are suitable for use with motors that are rotatable in both counterclockwise and clockwise directions. The blades of the centrifugal fan rotate at a high speed in the fan cover to drive the air around to move at a high speed, and due to the action of centrifugal force, the air rotating at a high speed is thrown to the periphery, meets the blocking of the volute fan cover and shunts along two sides in the axial direction, and because the fan cover only has an air outlet on one side of the motor shell, the air is thrown out from a heat dissipation rib, and the other part of air flows back after being blocked, so that work doing waste is caused. The velocity of the air can be lost too much due to the change of direction by the strong obstruction of the fan housing. When load is great, under the not good condition of ventilation, the heat dissipation is bad, arouses easily that motor temperature is too high, will make the coil age for a long time, burns out the motor coil even under the severe condition.

The axial flow fan generates thrust when rotating due to the airfoil angle of the helical blades, and pushes air to the front from the rear of the blades to generate continuous air flow. The axial flow fan shaft is generally small in diameter, wide in fan blade and easy to concentrate blown air. However, if such a fan is directly mounted on the rear shaft of the motor, most of the air is directly blown onto the rear end cover due to the special structure of the rear end of the motor, so that air rebounds, and the effect is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compound mixed flow radiator fan for motor aims at solving the problem that provides among the above-mentioned background art.

The utility model provides a compound mixed flow radiator fan for motor, including axle sleeve, mounting disc and a plurality of blade, the middle part of mounting disc with the axle sleeve cooperation installation, the axle sleeve is installed with the main shaft cooperation of motor, can drive the mounting disc is followed the motor rotates, and is a plurality of the blade about the center of mounting disc is the array distribution, one side of blade with the internal surface of mounting disc is perpendicular to be connected, and follows the radial direction of mounting disc by the border of mounting disc stretches out, the opposite side of blade is gradually to being on a parallel with the bending of mounting disc internal surface direction.

Preferably, two adjacent blades are bent towards the same side, and the bent parts of the blades are continuous cambered surfaces.

Preferably, the number of the blades is an odd number.

Preferably, the blades are integrally connected with the inner surface of the mounting plate by welding.

Preferably, the included angle between the tangential direction of the cambered surface and the inner surface of the mounting disc is not more than 45 degrees.

Preferably, the vanes are gradually curved from their 2/3 vane height from the inner surface of the mounting plate, forming the cambered surface.

Preferably, the bending direction of two adjacent blades faces the same side.

Preferably, the number of blades is at least 5.

Preferably, the number of the blades is 13-17.

Preferably, a cylindrical protective cover is sleeved on the outer side of the blade.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the shape of the blade is improved, so that the inner side of the blade is a centrifugal straight blade, the outer side of the blade is gradually bent and transited to an axial flow type, the blade has the characteristic of high air pressure of a centrifugal fan and the characteristic of large air volume of an axial flow fan, the advantages of the two fans are combined into a whole, sufficient air volume and air pressure are ensured, and the heat dissipation efficiency of a motor is improved;

2. the cooling fan can quickly reduce the temperature of the motor, can better protect the bearings embedded in the small covers at the two ends of the motor, and can ensure that lubricating grease always keeps certain viscosity, thereby ensuring the lubrication of the bearings, and avoiding the situations that the viscosity of the lubricating grease of the bearings is reduced due to overhigh temperature, and the bearings are dry-ground even lose lubrication in serious cases, so that the motor is damaged in short time;

3. the number of the blades is designed to be odd, the number of the blades can be increased or decreased according to the size and the air volume of the fan, the blades are prevented from being symmetrically arranged, and the situation that the blades cannot bear fatigue caused by resonance for a long time and are easy to break and the like due to the fact that the fan generates larger resonance during high-speed operation is avoided;

4. the air flow direction is changed through the structural design of the blades, even if no protective cover is arranged, the wind can be blown to the motor heat dissipation shell, and the protective cover can be arranged for protection and further flow guiding.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front schematic view of a composite mixed flow heat dissipation fan for an electric machine according to the present invention;

fig. 2 is a front schematic view of the middle shaft sleeve of the present invention.

Description of reference numerals:

1: a shaft sleeve; 2: mounting a disc; 3: a blade; 4: and (4) riveting.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, the utility model provides a compound mixed flow radiator fan for motor, including axle sleeve 1, mounting disc 2 and a plurality of blade 3, mounting disc 2 is circular, and its middle part rivets the installation through 6M 8's rivet 4 with the terminal surface of axle sleeve 1, and axle sleeve 1 and the main shaft cooperation installation of motor can rotate under the drive of motor, and then drives mounting disc 2 and blade 3 and rotate together.

The number of the blades 3 is odd number, the number is not less than 5, and the number can be increased or decreased according to the size of the fan and the requirement of the air volume, 13, 15 or 17 blades are preferred in the actual production, and in the embodiment, 13 blades 3 are selected for illustration. 13 blade 3 is array evenly distributed about the center of mounting disc 2, and a side surface of blade 3 and the internal surface of mounting disc 2 pass through welding mode body coupling, and perpendicular connection between root and the mounting disc 2 of blade 3, and the outer peripheral face of axle sleeve 1 is pressed close to the inboard of blade 3 arranges, and the outside of blade 3 stretches out 2 surface ranges of mounting disc along the radial direction of mounting disc 2, and top one side of blade 3 is bent to the plane direction that is on a parallel with 2 internal surfaces of mounting disc by 2 planes of perpendicular to mounting disc gradually.

Wherein, the 1/3 height range near the root of the blade 3 is in the plane vertical to the mounting disc 2, the height range from this to 2/3 height range of the top of the blade 3 is gradually curved, the curved part of the blade 3 forms a continuous smooth cambered surface, and the maximum included angle between the tangential direction of the cambered surface and the inner surface of the mounting disc 2 is 45 degrees. The bending direction of each blade 3 is along the rotation direction of the mounting disc 2, i.e. in accordance with the rotation direction of the motor.

In practical production application, most working motors only rotate in one direction once being put into operation, and steering is not frequently adjusted. Under the condition of not considering the steering, the double-steering advantage of the centrifugal fan can be ignored, but the defect of small air volume can be amplified, so that poor heat dissipation and overhigh temperature rise of the motor can be caused.

And in this embodiment, through redesign to above-mentioned blade 3 structure, make the root department of blade 3 be centrifugal straight blade, the top is crooked gradually, and the transition is axial-flow type blade, makes it both have the high characteristics of centrifugal fan wind pressure, has the big characteristics of axial-flow type fan amount of wind again to combine the advantage of two kinds of fans in an organic whole, guarantee sufficient amount of wind and wind pressure, and then reach the purpose that improves the radiating efficiency of motor. The motor temperature descends fast, and the bearing of inlaying in the protection motor both ends tegillum that can be better makes lubricating grease remain certain viscosity throughout to guarantee the lubrication of bearing, avoid because of the high temperature, make bearing lubricating grease viscosity reduce, lose the lubrication even when serious, cause the bearing dry grinding, cause the condition of motor damage to take place in the short time.

In addition, in this embodiment, the number of the blades 3 is designed to be odd, so that the blades can be prevented from forming a symmetrical arrangement, and the situation that the blades cannot bear fatigue caused by resonance for a long time and are easy to break due to the fact that the fan generates larger resonance when the fan runs at a high speed can be avoided. In order to ensure the air volume and the air pressure, the number of the blades 3 is kept above 5, 7, 9, 11, 13, 15, 17 and the like can be selected, and the blades can be increased or decreased according to the size of the fan and the requirement of the air volume.

In this embodiment, the air flow direction is mainly changed by the structural design of the blades 3, and the wind can be blown to the heat dissipation shell of the motor without a protective cover to dissipate the heat. In another embodiment, a protective cover can be arranged outside the blade 3, the protective cover is cylindrical and is sleeved outside the blade 3, the blade 3 can be protected, meanwhile, part of air can also be guided along the inner surface of the protective cover, and the heat dissipation efficiency is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a compound mixed flow radiator fan for motor, its characterized in that, includes axle sleeve, mounting disc and a plurality of blade, the middle part of mounting disc with the axle sleeve cooperation installation, the axle sleeve is installed with the main shaft cooperation of motor, can drive the mounting disc is along the motor rotates, and is a plurality of the blade is about the center of mounting disc is the array distribution, one side of blade with the internal surface of mounting disc is perpendicular to be connected, and follows the radial direction of mounting disc by the border of mounting disc stretches out, the opposite side of blade is gradually to being on a parallel with the internal surface direction of mounting disc is crooked.

2. A compound mixed flow radiator fan for motor as claimed in claim 1 wherein two adjacent said blades are curved to the same side and the curved portion of said blades is a continuous arc.

3. A compound mixed flow radiator fan for an electric machine as claimed in claim 1, wherein the number of said blades is an odd number.

4. The compound mixed flow radiator fan for electric machine according to claim 1, wherein said blades are integrally connected with the inner surface of said mounting plate by welding.

5. A compound mixed flow radiator fan for motor as claimed in claim 2 wherein the tangential direction of said cambered surface is at an angle of no more than 45 ° to the inner surface of said mounting plate.

6. A compound mixed flow radiator fan for an electric motor as claimed in claim 2, wherein said blades are gradually curved from 2/3 blade heights from the inner surface of said mounting plate to form said arc surface.

7. A compound mixed flow radiator fan for an electric motor as claimed in claim 2, wherein the direction of curvature of two adjacent blades faces the same side.

8. A compound mixed flow radiator fan for an electric machine as claimed in claim 3 wherein said number of blades is at least 5.

9. The compound mixed flow heat dissipation fan for the motor as claimed in claim 8, wherein the number of the blades is 13-17.

10. The compound mixed flow radiator fan for motor of claim 1 wherein the outside of said blades is sleeved with a cylindrical shield.