Motor fan blade

Abstract

The utility model relates to a motor fan blade, which is arranged on a rotor iron core, the rotor iron core is coaxially connected with a commutator, the motor fan blade comprises a first connecting ring, the first connecting ring is coaxially arranged with the commutator and is positioned on the periphery of the commutator, the inner ring of the first connecting ring is provided with a bulge, and the bulge is propped against the commutator along the radial direction of the first connecting ring; the first connecting ring is in interference fit with the commutator through the bulge, and a viscous colloid is filled between the inner ring and the commutator; the second connecting ring and the first connecting ring are coaxially arranged, and the second connecting ring is bonded with the rotor iron core; the blades are distributed in the circumferential direction of the first connecting ring in an annular array mode, and the blades are connected with the first connecting ring and the second connecting ring. The fan blade can be continuously and stably fixed on the rotor core for a long time, the position deviation of the fan blade is reduced, the air volume is obviously increased, and the temperature rise of the motor is prevented from being too fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially is a motor fan blade. BACKGROUND

[0002] When the motor is running for a long time under high load, the heat generated by copper loss, iron loss and mechanical friction is easy to accumulate. Once the winding temperature exceeds the tolerance limit of the insulation material, the insulation material will age, the permanent magnet will demagnetize, and the bearing lubrication will fail, which will greatly affect the service life of the motor. With the development of industrial equipment intelligence and high power density, modern motors are facing more severe working conditions.

[0003] Currently, the market requires the motor to run stably for more than 500 hours, so the temperature rise generated inside during operation is strictly limited. As the core component of motor active heat dissipation, the fan blade design directly affects the motor airflow organization efficiency and temperature rise level. The current motor fan blade has the problem of insufficient number and area of blades, which leads to insufficient air volume of the fan blade, resulting in rapid temperature rise of the motor. Moreover, the fan blade cannot be fixed on the rotor core for a long time, and the position offset of the fan blade will change the angle of the blade, reduce the aerodynamic efficiency, and further reduce the heat dissipation effect of the fan blade. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the motor fan blade cannot be stably fixed on the rotor core for a long time, the angle of the blade changes after the fan blade is offset, the air volume of the fan blade decreases, and the motor heats up quickly. Therefore, a motor fan blade is provided, which can be stably fixed on the rotor core for a long time, reduces the position offset of the fan blade, and significantly increases the air volume to avoid rapid temperature rise of the motor.

[0005] To solve the above technical problems, the utility model provides a motor fan blade which is arranged on a rotor core, the rotor core is coaxially connected with a commutator, and the motor fan blade comprises,

[0006] A first connecting ring is coaxially arranged with the commutator and located at the periphery of the commutator. The inner circle of the first connecting ring is provided with a protrusion which abuts against the commutator along the radial direction of the first connecting ring. The first connecting ring is in interference fit with the commutator through the protrusion, and viscous glue is filled between the inner circle and the commutator.

[0007] A second connecting ring is coaxially arranged with the first connecting ring, and the second connecting ring is bonded with the rotor core.

[0008] A plurality of blades are arranged in a circumferential annular array along the first connecting ring, and the blades are connected with the first connecting ring and the second connecting ring.

[0009] In one embodiment of the utility model, still include with the first connecting ring coaxial arrangement third connecting ring, a plurality of the vane still connect third connecting ring.

[0010] In one embodiment of the utility model, the diameter of the first connecting ring is smaller than the diameter of the third connecting ring.

[0011] In one embodiment of the utility model, the vane is connected to the first connecting ring and the third connecting ring respectively along the radial direction of the first connecting ring.

[0012] In one embodiment of the utility model, the second connecting ring is uniformly distributed with a plurality of inserts along its circumferential direction, and the plurality of inserts are inserted into the rotor slot of the rotor core along the axial direction of the second connecting ring, and the inserts are in interference fit with the rotor slot.

[0013] In one embodiment of the utility model, the middle part of the vane is connected to the second connecting ring through a connecting strip, and the connecting strip extends along the axial direction of the second connecting ring.

[0014] In one embodiment of the utility model, the vane is recessed to form an arc-shaped recess on the side close to the rotor core, and the two ends of the arc-shaped recess extend to the connecting strip and the first connecting ring.

[0015] In one embodiment of the utility model, a plurality of the protrusions are arranged in an annular array along the inner ring, and the protrusions are provided with arc surfaces abutting against the commutator.

[0016] In one embodiment of the utility model, the second connecting ring abuts against the rotor core along its axial direction, and the second connecting ring is bonded at the abutting position with the rotor core.

[0017] In one embodiment of the utility model, the vane is provided as a flat plate-shaped vane, the flat plate-shaped vane extends along the radial direction of the first connecting ring, and the flat plate-shaped vane is provided perpendicular to its rotation plane.

[0018] In one embodiment of the utility model, the commutator is contracted along its radial direction to form a contraction part and a step, the first connecting ring is located at the periphery of the contraction part, and the step abuts against the viscous colloid along the direction in which the rotor core is arranged.

[0019] In one embodiment of the utility model, part of the protrusions and part of the vanes are arranged one by one in radial direction of the first connecting ring.

[0020] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0021] The motor fan blade, the first connecting ring is filled with viscous colloid in the gap between the inner ring of the first connecting ring and the commutator, so that the fan blade and the commutator are fixed; the second connecting ring is bonded with the rotor core, so that the fan blade and the rotor core are fixed, and the stability of the fan blade is improved; the blade is connected with the first connecting ring and the second connecting ring, the strength of the blade is greatly improved, the bending phenomenon of the blade in the rotating process is reduced, and the air volume of the fan blade is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the content of the utility model more easily be clearly understood, the following is according to the specific embodiment of the utility model and combining with the drawings, the utility model is further detailed, wherein

[0023] Figure 1 It is the structure schematic view of the motor fan blade, the commutator, the rotor core and the rotating shaft in the preferred embodiment of the utility model;

[0024] Figure 2 It is the structure schematic view of the motor fan blade, the commutator, the rotor core and the rotating shaft in the preferred embodiment of the utility model; Figure 1

[0025] Figure 3 It is the structure schematic view of the motor fan blade, the commutator, the rotor core and the rotating shaft in the preferred embodiment of the utility model; Figure 1

[0026] Description of the Drawings: 1, rotor core;11, rotor slot;2, commutator;21, step;22, contraction part;3, fan blade;31, first connecting ring;311, inner ring;312, protrusion;312a, first protrusion;313, gap;3121, arc surface;32, second connecting ring;33, third connecting ring;34, blade;34a, first blade;341, arc concave part;35, connecting strip;4, rotating shaft;6, plug-in part. DETAILED DESCRIPTION

[0027] The utility model is further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0028] Referring to Figure 1 In one embodiment of the utility model, a kind of motor fan blade is disclosed, it is arranged on the rotor core 1 of motor, the rotor core 1 is coaxially connected with commutator 2, rotating shaft 4, wherein, rotating shaft 4 is coaxially connected with commutator 2, this motor fan blade 3 includes,

[0029] ​​a first connecting ring 31 coaxially arranged with the commutator 2 and located at the periphery of the commutator 2, an inner ring 311 of the first connecting ring 31 being provided with a protrusion 312 abutting against the commutator 2 along the radial direction of the first connecting ring 31, the first connecting ring 31 being in interference fit with the commutator 2 through the protrusion 312, and viscous glue being filled between the inner ring 311 and the commutator 2;

[0030] a second connecting ring 32 coaxially arranged with the first connecting ring 31, the second connecting ring 32 being bonded with the rotor core 1;

[0031] a plurality of blades 34 arranged in a circumferential annular array along the first connecting ring 31, and each of the blades 34 connecting the first connecting ring 31 and the second connecting ring 32.

[0032] The motor fan blade in the embodiment has the first connecting ring 31 in interference fit with the commutator 2 through the protrusion 312, which enhances the axial displacement resistance of the fan blade 3, and the gap 313 between the inner ring 311 of the first connecting ring 31 and the commutator 2 is filled with viscous glue, which is used to enhance the connection strength between the first connecting ring 31 and the commutator 2 and realize the first fixation of the fan blade 3; the second connecting ring 32 is bonded with the rotor core 1, which enhances the connection strength between the fan blade 3 and the rotor core 1 and realizes the second fixation of the fan blade 3, thereby greatly improving the stability of the fan blade 3; the blades 34 simultaneously connect the first connecting ring 31 and the second connecting ring 32, which greatly enhances the strength of the blades 34 and reduces the bending phenomenon of the ends of the blades 34 in the rotating process, so that the design area of the blades 34 can be increased and the air volume of the fan blade 3 is improved; when the rotor core 1 rotates, the fan blade 3 rotates along with the rotor core 1, and the fan blade 3 continuously diffuses the internal heat to the outside of the motor.

[0033] Referring to Figure 1 In an embodiment of the utility model, 12 blades 34 are arranged in a circumferential annular array along the first connecting ring 31.

[0034] Referring to Figure 3 In an embodiment of the utility model, a third connecting ring 33 coaxially arranged with the first connecting ring 31 is further included, and 12 blades 34 are also connected with the third connecting ring 33, and the third connecting ring 33 is used to enhance the structural strength of the ends of the 12 blades 34, suppress the high-frequency vibration of the ends of the blades 34, and prevent the angle of the ends of the blades 34 from greatly changing in the rotating process, so that the design area of the blades 34 can be increased.

[0035] Referring to Figure 1As shown in the utility model, in one embodiment of the utility model, the diameter of the first connecting ring 31 is smaller than the diameter of the third connecting ring 33, which can increase the cross-sectional area of the air duct, reduce air resistance and accelerate air flow.

[0036] Referring to Figure 1 As shown in the utility model, in one embodiment of the utility model, the two ends of the blade 34 along the radial direction of the first connecting ring 31 are connected to the first connecting ring 31 and the third connecting ring 33 respectively, so that the 12 blades 34, the first connecting ring 31 and the third connecting ring 33 form a truss-like structure, which enhances the overall bending resistance of the fan blade 3.

[0037] Referring to Figure 3 As shown in the utility model, in one embodiment of the utility model, the second connecting ring 32 is uniformly distributed with five plug-in parts 6 along its circumferential direction, and the plug-in part 6 is integrated with the second connecting ring 32. The five plug-in parts 6 are inserted into the rotor slot 11 of the rotor core 1 along the axial direction of the second connecting ring 32, and the plug-in part 6 is in interference fit with the rotor slot 11, which is used to suppress the circumferential sliding of the fan blade 3.

[0038] Referring to Figure 3 As shown in the utility model, in one embodiment of the utility model, the middle part of the blade 34 is connected to the second connecting ring 32 through a connecting strip 35, which prevents the middle part of the blade 34 from being deformed inwardly due to centrifugal force. The connecting strip 35 extends along the axial direction of the second connecting ring 32, conducts the load received by the blade 34 to the second connecting ring 32, and reduces the risk of root fracture of the blade 34.

[0039] Referring to Figure 3 As shown in the utility model, in one embodiment of the utility model, the blade 34 is recessed on one side close to the rotor core 1 to form an arc-shaped recessed part 341, and the two ends of the arc-shaped recessed part 341 extend to the connecting strip 35 and the first connecting ring 31. The arc-shaped recessed part 341 can increase the air duct area of the fan blade 3, optimize the local airflow distribution and accelerate the air flow speed.

[0040] Referring to Figure 3 As shown in the utility model, in one embodiment of the utility model, a plurality of protrusions 312 are arranged in an annular array along the inner ring 311, which is used to avoid single-point stress concentration and reduce the bending deformation of the protrusion 312. The protrusion 312 is provided with an arc surface 3121, which abuts against the commutator 2. When the fan blade 3 is assembled, the arc surface 3121 slides along the circumferential side surface of the commutator 2, which can avoid scratching the commutator 2 by the protrusion 312.

[0041] Referring to Figure 3As shown in the utility model in one embodiment, 5 protrusions 312 are distributed along the axial direction of the first connecting ring 31, and each protrusion 312 is provided with a claw extending towards the inside of the first connecting ring 31.

[0042] Referring to Figure 2 As shown in the utility model in one embodiment, the second connecting ring 32 abuts against the rotor core 1 along the axial direction thereof, and the abutting position of the second connecting ring 32 and the rotor core 1 is bonded by glue, thereby enhancing the resistance of the fan blade 3 to the risk of loosening caused by axial sliding.

[0043] Referring to Figure 1 As shown in the utility model in one embodiment, the blade 34 is provided as a flat blade 34 extending along the radial direction of the first connecting ring 31, so that the area of the blade 34 is greatly increased, the heat dissipation effect of the motor is significantly improved, and the flat blade 34 is arranged perpendicular to the rotation plane thereof.

[0044] Referring to Figure 3 As shown in the utility model in one embodiment, the commutator 2 is contracted along the radial direction thereof to form a contraction portion 22 and a step 21, the first connecting ring 31 is located at the periphery of the contraction portion 22, and the step 21 abuts against the viscous adhesive along the direction in which the rotor core 1 is arranged, so that the step 21 can limit the displacement of the adhesive and prevent the adhesive from being separated.

[0045] Referring to Figure 1 As shown in the utility model in one embodiment, part of the protrusions 312 and part of the blades 34 are arranged in one-to-one correspondence along the radial direction of the first connecting ring 31, for example, the first protrusion 312a supports the root of the corresponding first blade 34a along the radial direction, and directly transmits the centrifugal force to the commutator 2, thereby avoiding local stress concentration caused by asymmetric support.

[0046] In one embodiment of the utility model, the viscous adhesive is provided as a structural adhesive having excellent durability and high-strength viscosity.

[0047] The working principle of the motor fan blade of the utility model is as follows:

[0048] After the motor is powered on, the rotor core 1 and the rotating shaft 4 begin to rotate, then the commutator 2 and the fan blade 3 rotate with the rotor core 1, and the fan blade 3 rotates to form a negative pressure in the motor, so that the air in the motor is continuously sprayed to the outside, and the hot air in the motor is also sprayed to the outside, thereby achieving the effect of reducing the temperature of the motor.

[0049] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A motor fan blade, disposed on a rotor core, wherein a commutator is coaxially connected to the rotor core, characterized in that, include, A first connecting ring is coaxially arranged with the commutator and located on the periphery of the commutator. The inner ring of the first connecting ring has a protrusion that abuts against the commutator radially along the first connecting ring. The first connecting ring is interference-fitted with the commutator through the protrusion, and the space between the inner ring and the commutator is filled with an adhesive colloid. The second connecting ring is coaxially arranged with the first connecting ring and is bonded to the rotor core. Multiple blades are arranged in a circumferential ring array along the first connecting ring, and each blade is connected to both the first connecting ring and the second connecting ring.

2. The motor fan blade according to claim 1, characterized in that, It also includes a third connecting ring coaxially arranged with the first connecting ring, and the plurality of blades are also connected to the third connecting ring.

3. A motor fan blade according to claim 2, characterized in that, The diameter of the first connecting ring is smaller than the diameter of the third connecting ring.

4. A motor fan blade according to claim 2, characterized in that, The blade is connected to the first connecting ring and the third connecting ring at its two ends along the radial direction of the first connecting ring, respectively.

5. A motor fan blade according to claim 1, characterized in that, The second connecting ring has a plurality of plug-in components evenly distributed along its circumference. The plurality of plug-in components are inserted into the rotor slots of the rotor core along the axial direction of the second connecting ring, and the plug-in components are interference-fitted with the rotor slots.

6. A motor fan blade according to claim 1, characterized in that, The middle part of the blade is connected to the second connecting ring by a connecting strip, which extends along the axial direction of the second connecting ring.

7. A motor fan blade according to claim 6, characterized in that, The blade has an inwardly recessed arc-shaped portion on the side near the rotor core, and the two ends of the arc-shaped recess extend to the connecting strip and the first connecting ring.

8. A motor fan blade according to claim 1, characterized in that, It also includes a plurality of protrusions, which are distributed in a ring array along the inner ring, and each protrusion has an arc surface that abuts against the commutator.

9. A motor fan blade according to claim 1, characterized in that, The second connecting ring abuts against the rotor core along its axial direction, and the abutment point between the second connecting ring and the rotor core is bonded together.

10. A motor fan blade according to claim 1, characterized in that, The blade is configured as a flat plate blade, which extends radially along the first connecting ring and is arranged perpendicular to its plane of rotation.

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