WO2021012341A1 - 轴流风机、空调室外机及空调器 - Google Patents

轴流风机、空调室外机及空调器 Download PDF

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Publication number
WO2021012341A1
WO2021012341A1 PCT/CN2019/101734 CN2019101734W WO2021012341A1 WO 2021012341 A1 WO2021012341 A1 WO 2021012341A1 CN 2019101734 W CN2019101734 W CN 2019101734W WO 2021012341 A1 WO2021012341 A1 WO 2021012341A1
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WO
WIPO (PCT)
Prior art keywords
motor shaft
axial flow
hub
flow fan
fan according
Prior art date
Application number
PCT/CN2019/101734
Other languages
English (en)
French (fr)
Inventor
高文栋
Original Assignee
广东美的制冷设备有限公司
美的集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201921169879.7U external-priority patent/CN210196088U/zh
Priority claimed from CN201921166355.2U external-priority patent/CN210218178U/zh
Application filed by 广东美的制冷设备有限公司, 美的集团股份有限公司 filed Critical 广东美的制冷设备有限公司
Priority to EP19938280.5A priority Critical patent/EP4001661A4/en
Publication of WO2021012341A1 publication Critical patent/WO2021012341A1/zh
Priority to US17/577,705 priority patent/US11913469B2/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/38—Retaining components in desired mutual position by a spring, i.e. spring loaded or biased towards a certain position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/501—Elasticity

Definitions

  • This application relates to the field of air treatment equipment, and in particular to an axial fan, an outdoor unit of an air conditioner, and an air conditioner.
  • the axial flow wind wheel in the related technology usually adopts the relevant thinning treatment of the blades.
  • the wind wheel and the motor shaft are positioned through the coordination between the motor shaft and the hub. ,
  • the lock nut is tightened. Due to the reduced quality of the wind wheel, the resistance of the wind wheel is large, the blades are subjected to different axial forces during the rotation of the wind wheel, which causes the wind wheel to operate in an unbalanced state, and because the axial flow wheel has weak performance against unbalanced excitation, it leads to The motor shaft is excited by a large unbalance, which in turn causes the motor to be unbalanced, and the motor produces a lot of noise.
  • This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application proposes an axial flow fan, which generates less noise during operation.
  • This application also proposes an air conditioner outdoor unit with the above-mentioned axial flow fan.
  • the application also proposes an air conditioner with the above-mentioned outdoor unit of the air conditioner.
  • the axial flow fan includes: an axial flow wind wheel, the axial flow wind wheel comprising a hub and blades arranged on the outer peripheral wall of the hub, the hub having a shaft hole;
  • a motor that drives the axial flow wind wheel to rotate, the motor includes a motor body and a motor shaft connected to the motor body, the motor shaft is matched with the shaft hole; a resistance piece, the resistance piece is arranged at the On the hub and adjacent to the free end of the motor shaft, the rigidity of the resist is greater than the rigidity of the hub.
  • the axial flow fan of the present application by arranging the resistance member adjacent to the free end of the motor shaft on the hub and the resistance of the resistance member is greater than the rigidity of the hub, the unbalanced excitation of the motor shaft can be reduced, and the noise generated during the operation of the axial flow fan can be reduced Smaller.
  • the stiffness of the resist is greater than the stiffness of the motor shaft.
  • the resistance piece is a metal piece or a ceramic piece.
  • the stiffness value of the resistance member ranges from 0.8 ⁇ 10 7 -1.5 ⁇ 10 7 N/m.
  • the resistance member has a ring shape and is sleeved on the outer peripheral side of the motor shaft.
  • annular mounting groove is formed on the inner peripheral wall of the shaft hole, and the resistance member is accommodated in the mounting groove.
  • the mounting groove penetrates the end surface of the hub adjacent to the free end of the motor shaft in the axial direction.
  • the end surface of the resistance member adjacent to the free end of the motor shaft is flush with the end surface of the hub adjacent to the free end of the motor shaft.
  • the axial flow fan includes: a lock nut, the lock nut is threadedly connected with the free end of the motor shaft, and the lock nut is provided on the free end of the resistance member adjacent to the motor shaft. And the locking nut abuts against the resisting piece.
  • the resistance piece and the lock nut are integrally formed.
  • the projection of the locking nut on the reference plane is a first projection
  • the projection of the resistance member on the reference plane is a second projection
  • the outer contour of the first projection is located on the second projection In the outer contour, the reference plane is perpendicular to the center axis of the motor shaft.
  • the inner peripheral wall of the resisting member is spaced apart from the outer peripheral wall of the motor shaft.
  • the length of the resistance member in the axial direction of the motor shaft is 3-6 mm.
  • the resistance piece is embedded in the hub by injection molding.
  • the air conditioner outdoor unit includes: the axial flow fan according to the embodiment of the first aspect of the present application.
  • the noise generated during the operation of the air conditioner outdoor unit is small.
  • the air conditioner according to the embodiment of the third aspect of the present application includes an air conditioner indoor unit; an air conditioner outdoor unit, and the air conditioner outdoor unit is the air conditioner outdoor unit according to the embodiment of the second aspect of the present application.
  • the noise generated by the air conditioner during operation is small.
  • Fig. 1 is a partial structural diagram of an outdoor unit of an air conditioner according to some embodiments of the present application
  • Figure 2 is a cross-sectional view of the axial fan in Figure 1;
  • Figure 3 is an enlarged view of A in Figure 2;
  • FIG. 4 is a partial structural diagram of an outdoor unit of an air conditioner according to other embodiments of the present application.
  • Figure 5 is a cross-sectional view of the axial fan in Figure 4.
  • Figure 6 is an enlarged view of B in Figure 5;
  • Fig. 7 is a cross-sectional view of the elastic buffer member in Fig. 5.
  • Motor 2 Motor body 21; Motor shaft 22; Free end 221;
  • Elastic buffer 5 first buffer 51; second buffer 52.
  • the axial flow fan 100 according to an embodiment of the present application will be described below with reference to the drawings.
  • an axial fan 100 includes an axial fan 1, a motor 2 for driving the axial fan 1 to rotate, and a resistance member 3.
  • the axial flow wind wheel 1 includes a hub 11 and blades 12 arranged on the outer peripheral wall of the hub 11.
  • the blades 12 may be multiple (multiple refers to two or more) and the multiple blades 12 are along the circumferential direction of the hub 11. They are arranged at intervals, and the hub 11 has a shaft hole.
  • the motor 2 includes a motor body 21 and a motor shaft 22 connected to the motor body 21.
  • the motor shaft 22 is matched with the shaft hole, so that the motor 2 can drive the axial fan 1 to rotate.
  • the motor 2 runs and drives the axial fan 1 to rotate, and the axial fan 100 generates axial airflow.
  • the resistance piece 3 is arranged on the hub 11 and adjacent to the free end 221 of the motor shaft 22, and the rigidity of the resistance piece 3 is greater than that of the hub 11.
  • the resistance member 3 adjacent to the free end 221 of the motor shaft 22 is provided on the hub 11 and the resistance member 3 has a greater rigidity than that of the hub 11, thereby increasing the overall rigidity of the axial flow wind wheel 1, thereby As a result, the force of the axial flow fan 1 against the unbalanced force is increased, and the unbalanced excitation of the motor shaft 22 can be reduced, so that the axial flow fan 100 generates less noise during operation.
  • the stiffness of the resist 3 is greater than the stiffness of the motor shaft 22, which is beneficial to enhance the structural stability of the end of the axial flow fan 100 away from the motor body 21 and reduce the motor shaft 22 Imbalanced incentives received.
  • the resistance member 3 is a metal member or a ceramic member, so that the resistance member 3 has greater rigidity and good structural strength, and is easy to process.
  • the stiffness value of the resist 3 ranges from 0.8 ⁇ 10 7 -1.5 ⁇ 10 7 N/m. If the stiffness value of the resistance member 3 is not within the above range, it is not conducive to reducing the unbalanced excitation of the motor shaft 22, and the connection of the hub 11, the motor shaft 22 and the resistance member 3 is unstable. By limiting the stiffness value of the resistance member 3 within a suitable range, the unbalanced excitation of the motor shaft 22 is effectively reduced, and the connection of the hub 11, the motor shaft 22 and the resistance member 3 is stabilized. For example, the stiffness value of the resist 3 is 1 ⁇ 10 7 N/m.
  • the resistance member 3 is ring-shaped and sleeved on the outer peripheral side of the motor shaft 22, the structure is simple, and the resistance member 3 has a uniform structure to avoid uneven operation of the axial fan 100
  • the resistance piece 3 generates a new unbalanced incentive.
  • make the axial flow wind wheel 1 matched with the resistance piece 3 of uniform structure resist the imbalance force to increase, reduce the unbalanced excitation of the motor shaft 22, and at the same time make the resistance piece 3 and the motor shaft 22 have a higher connection strength .
  • an annular mounting groove is formed on the inner peripheral wall of the shaft hole, and the resist 3 is accommodated in the mounting groove.
  • the mounting groove can position the resist 3 to facilitate the mounting and fixing of the resist 3, and make The resistance piece 3 and the hub 11 have a high connection strength.
  • the mounting groove penetrates the end surface of the free end 221 of the hub 11 adjacent to the motor shaft 22 in the axial direction, which facilitates the processing of the mounting groove and the installation and replacement of the resist 3.
  • the end of the axial fan 1 adjacent to the free end 221 receives the greatest unbalanced force.
  • the mounting groove is adjacent to the free end 221 so that the resist 3 is adjacent to the free end 221, which improves the shaft.
  • the overall stiffness of the end of the flow wind wheel 1 adjacent to the free end 221 increases the force of the axial flow wind wheel 1 against the unbalanced force, which is beneficial to greatly reduce the unbalanced excitation of the motor shaft 22.
  • the end surface of the free end 221 of the resistance member 3 adjacent to the motor shaft 22 is flush with the end surface of the free end 221 of the hub 11 adjacent to the motor shaft 22, which can ensure the contact area of the resistance member 3 and the hub 11 , So that the resistance member 3 and the hub 11 are connected stably, so that the axial flow wind wheel 1 resists the unbalanced force to increase, and the product is beautiful.
  • the axial flow fan 100 includes a lock nut 4, which is threadedly connected to the free end 221 of the motor shaft 22, so that the lock nut 4 is relatively fixed to the motor shaft 22 .
  • the lock nut 4 is arranged on the side of the resistance piece 3 adjacent to the free end 221 of the motor shaft 22, and the lock nut 4 abuts against the resistance piece 3, and through the limiting effect of the mounting groove, the resistance piece 3 is placed on the motor shaft 22 is fixed in the axial direction.
  • the lock nut 4 can provide an axial force to the resist 3 and the hub 11.
  • the axial surface of the hub 11 receives the axial force.
  • the resistance piece 3 and the lock nut 4 are integrally formed, so that the resistance piece 3 and the lock nut 4 have a higher connection strength, and the assembly process is reduced.
  • the projection of the lock nut 4 on the reference plane is the first projection
  • the projection of the resist 3 on the reference plane is the second projection
  • the outer contour of the first projection is located within the outer contour of the second projection
  • the reference plane is perpendicular to the center axis of the motor shaft 22, which ensures the contact area between the resistance piece 3 and the lock nut 4, so that the resistance piece 3 is uniformly and stably stressed, which is beneficial to reduce the unbalanced force received by the hub 11 and prevent locking at the same time
  • the nut 4 and the wheel hub 11 are suspended in the air and it is not convenient to clean the dust.
  • the inner peripheral wall of the resist 3 and the outer peripheral wall of the motor shaft 22 are spaced apart, which reduces the direct unbalanced excitation transmission of the hub 11 to the motor shaft 22, thereby reducing the non-uniformity of the motor shaft 22.
  • Balance incentives are provided.
  • the length H1 of the resistance member 3 in the axial direction of the motor shaft 22 is 3-6 mm. If H1 is too small, it is not conducive to the resistance member 3 to effectively improve the overall rigidity of the axial flow fan 100. If H1 is too large, the cost of resist 3 is too high. By limiting H1 to an appropriate range, the cost of the resistance member 3 is reduced while ensuring that the resistance member 3 effectively increases the overall rigidity of the axial flow fan 100. For example, H1 can be 4mm.
  • the resistance member 3 is embedded in the hub 11 by injection molding, so that the resistance member 3 and the hub 11 are relatively fixed.
  • the resistance member 3 and the hub 11 have a strong connection strength, which is beneficial to reduce the hub. 11 Unbalanced vibration caused by unbalanced excitation.
  • an outdoor unit of an air conditioner according to an embodiment of the second aspect of the present application includes an axial fan 100 according to the embodiment of the first aspect of the present application.
  • the noise generated by the axial fan 100 is reduced, thereby reducing the noise generated by the outdoor unit of the air conditioner.
  • the above-mentioned axial flow fan 100 is provided, so that the noise generated during the operation of the air conditioner outdoor unit is small.
  • the air conditioner according to the embodiment of the third aspect of the present application includes an air conditioner indoor unit and an air conditioner outdoor unit.
  • the outdoor unit of the air conditioner is the outdoor unit of the air conditioner according to the embodiment of the second aspect of the present application.
  • the air conditioner may be a split wall-mounted air conditioner, and the air conditioner may also be a split floor-standing air conditioner.
  • the noise generated by the air conditioner during operation is small.
  • the axial fan 100 includes an axial fan 1, a motor 2 for driving the axial fan 1 to rotate, and an elastic buffer member 5.
  • the axial flow wind wheel 1 includes a hub 11 and blades 12 arranged on the outer peripheral wall of the hub 11.
  • the blades 12 may be multiple (multiple refers to two or more) and the multiple blades 12 are along the circumferential direction of the hub 11. They are arranged at intervals, and the hub 11 has a shaft hole.
  • the motor 2 includes a motor body 21 and a motor shaft 22 connected to the motor body 21.
  • the motor shaft 22 is matched with the shaft hole, so that the motor 2 can drive the axial fan 1 to rotate.
  • the motor 2 runs and drives the axial flow wheel 1 to rotate, and the axial flow fan 100 generates axial airflow.
  • the resistance of the blade 12 is large, so that the blade 12 is unbalanced excitation, and the blade 12 transmits the unbalanced excitation to the hub 11.
  • the hub 11 forms a relative displacement with the motor shaft 22 under the influence of the unbalanced excitation, and transmits the unbalanced excitation to the motor shaft 22.
  • the elastic buffer member 5 is provided on the motor shaft 22, at least a part of the elastic buffer member 5 is located between the outer peripheral wall of the motor shaft 22 and the inner peripheral wall of the shaft hole, and the elastic buffer member 5 is located between the outer peripheral wall of the motor shaft 22 and the inner peripheral wall of the shaft hole.
  • the part between the peripheral walls can be elastically deformed in the radial direction of the motor shaft 22, and the relative displacement between the hub 11 and the motor shaft 22 is reduced by the elastic deformation of the elastic buffer member 5 located between the hub 11 and the motor shaft 22,
  • the elastic buffer member 5 can absorb part of the unbalanced excitation, thereby reducing the unbalanced excitation transmitted from the hub 11 to the motor shaft 22, thereby reducing the unbalanced excitation received by the motor shaft 22 and reducing the noise generated by the motor 2.
  • a part of the elastic buffer member 5 may be located between the outer peripheral wall of the motor shaft 22 and the inner peripheral wall of the shaft hole.
  • all the elastic buffer members 5 may be located between the outer peripheral wall of the motor shaft 22 and the inner peripheral wall of the shaft hole.
  • the elastic buffer member 5 and the portion of the elastic buffer member 5 between the outer peripheral wall of the motor shaft 22 and the inner peripheral wall of the shaft hole can be elastically deformed in the radial direction of the motor shaft 22, As a result, the relative displacement between the hub 11 and the motor shaft 22 is reduced, the elastic buffer member 5 can absorb a part of the unbalanced excitation, and the unbalanced excitation received by the motor shaft 22 is reduced, so that the axial flow fan 100 generates less noise during operation.
  • the elastic buffer member 5 is adjacent to the free end 221 of the motor shaft 22.
  • the free end 221 receives the greatest degree of unbalanced excitation, and arranging the elastic buffer 5 here is beneficial to greatly reduce the unbalanced excitation of the motor shaft 22.
  • the elastic buffer member 5 includes a first buffer portion 51 having a cylindrical shape.
  • the first buffer portion 51 is sleeved on the motor shaft 22, so that the first buffer portion 51 has a uniform structure, and prevents the uneven first buffer portion 51 from generating a new unbalanced excitation during the operation of the axial flow fan 100.
  • at least a part of the first buffer part 51 is located between the outer peripheral wall of the motor shaft 22 and the inner peripheral wall of the shaft hole, so that the structure of the elastic buffer member 5 is simple, it is convenient to process the elastic buffer member 5, and the elastic buffer member 5 can be installed in the motor.
  • the unbalanced excitation of the motor shaft 22 is fully reduced.
  • a part of the first buffer portion 51 may be located between the outer peripheral wall of the motor shaft 22 and the inner peripheral wall of the shaft hole.
  • the entire first buffer portion 51 may be located between the outer peripheral wall of the motor shaft 22 and the inner peripheral wall of the shaft hole.
  • an accommodating cavity for accommodating the first buffer portion 51 is defined between the outer circumferential wall of the motor shaft 22 and the inner circumferential wall of the shaft hole, and the accommodating cavity is adjacent to the motor shaft 22 One side of the free end 221 is open.
  • the radial thickness of the first buffer portion 51 gradually decreases, which facilitates the insertion of the first buffer portion 51 into the accommodating cavity, and This enables the first buffer portion 51 to be in interference fit with the accommodating cavity, which improves the connection stability of the motor shaft 22, the elastic buffer member 5 and the hub 11, and facilitates the first buffer portion 51 to absorb unbalanced excitation.
  • the inner circumferential surface of the first buffer portion 51 extends along the axial direction of the motor shaft 22. In the direction from the motor body 21 to the free end 221 of the motor shaft 22, the outer circumferential surface of the first buffer portion 51 faces away from the motor shaft. Inclined extension in the direction of 22 facilitates the interference fit between the first buffer portion 51 and the receiving cavity, and also reduces the process difficulty of processing the first buffer portion 51.
  • the slope M of the outer circumferential surface of the first buffer portion 51 (refer to FIG. 7, the slope M is the vicinity of the outer circumferential wall of the first buffer portion 51 away from the motor shaft 22 and the first buffer portion 51
  • the range of the tangent value of the included angle ⁇ of the inner peripheral wall of the motor shaft 22 is 1/11-1/8. If the slope M is too small, the interference fit between the first buffer portion 51 and the receiving cavity may not be tight. If the slope M is too large, it is difficult to insert the first buffer portion 51 into the accommodating cavity, resulting in difficulty in assembly.
  • the slope M can be 1/10.
  • the end of the first buffer portion 51 away from the motor body 21 extends beyond the shaft hole to ensure the first buffer
  • the portion 51 has a sufficient contact area with the hub 11 and the motor shaft 22 so that the first buffer portion 51 can normally absorb the unbalanced excitation of the hub 11 to the motor shaft 22.
  • the elastic buffer member 5 includes a second buffer portion 52.
  • the second buffer portion 52 is formed at one end of the first buffer portion 51 away from the motor body 21.
  • the second buffer portion 52 is connected to the outer peripheral wall of the first buffer portion 51 and extends along the circumferential direction of the first buffer portion 51.
  • the buffer portion 52 is connected or abutted with the hub 11, which increases the contact area of the elastic buffer member 5 with the hub 11 and the motor shaft 22 and improves the connection strength between the elastic buffer member 5 and the hub 11 and the motor shaft 22.
  • the axial flow fan includes a lock nut 4, which is threadedly fitted with the free end 221 of the motor shaft 22, so that the lock nut 4 is relatively fixed to the motor shaft 22, And the lock nut 4 presses the second buffer portion 52 on the hub 11 so that the lock nut 4, the second buffer portion 52 and the hub 11 are connected stably.
  • the lock nut 4 is locked, the axial surface of the hub 11 is subjected to an axial force.
  • the hub 11 is subjected to unbalanced excitation, due to the existence of the axial force, the unbalanced excitation received by the hub 11 is reduced, which is then transmitted to the motor shaft The unbalanced incentive on 22 is reduced.
  • the projection of the lock nut 4 on the reference plane is located within the projection of the second buffer portion 52 on the reference plane (for example, the projection of the lock nut 4 on the reference plane is a ring, the second When the projection of the buffering portion 52 on the reference surface is annular, the outer ring radius of the second buffering portion 52 is greater than the outer ring radius of the lock nut 4.
  • the ratio of the axial length H2 of the first buffer portion 51 to the axial length H3 of the second buffer portion 52 is in the range of 2-5. If the ratio of the axial length H2 of the first buffer portion 51 to the axial length H3 of the second buffer portion 52 is too small, if H2 is too small, the performance of the first buffer portion in absorbing unbalanced excitation is reduced and the first buffer portion 51 and the receiving groove The connection strength of is too low; when H3 is too large, the cost of the second buffer portion 52 is too high and affects the appearance.
  • the ratio of the axial length H2 of the first buffer part 51 to the axial length H3 of the second buffer part 52 is too large, when H2 is too large, it is difficult to install the first buffer part 51 in the receiving groove; if H3 is too small, the first The performance of the second buffer part 52 to absorb unbalanced excitation is reduced.
  • the elastic buffer member 5 has good performance in absorbing unbalanced excitation, and facilitates the processing of elastic buffers.
  • Piece 5 and holding tank may be 3.
  • the axial length H3 of the second buffer portion 52 ranges from 5 to 8 mm. If H3 is too small, the performance of the second buffer portion 52 in absorbing unbalanced excitation is reduced. If H3 is too large, the cost of the second buffer portion 52 is too high and the appearance is affected. By limiting H3 to a suitable range, it is possible to reduce the cost of the second buffer part 52 and make the product beautiful while ensuring that the second buffer part 52 normally absorbs the unbalanced excitation. For example, H3 can be 6mm.
  • the elastic buffer member 5 is a rubber member or a plastic member, so that the elastic buffer member 5 has good elasticity and wear resistance.
  • the hardness range of the elastic buffer member 5 is 30-35 HRC. If the hardness of the elastic buffer member 5 is too large, the elastic buffer member 5 has poor elasticity. If the hardness of the elastic buffer member 5 is too small, the structural strength of the elastic buffer member 5 is too low. By limiting the hardness of the elastic buffer member 5 to an appropriate range, the elastic buffer member 5 has good elasticity and structural strength. For example, the hardness of the elastic buffer 5 is 33 HRC.
  • the outdoor unit of the air conditioner according to the embodiment of the fifth aspect of the present application includes the axial fan 100 according to the embodiment of the fourth aspect of the present application.
  • the noise generated by the axial fan 100 is reduced, thereby reducing the noise generated by the outdoor unit of the air conditioner.
  • the above-mentioned axial flow fan 100 is provided, so that the noise generated by the outdoor unit of the air conditioner is small when it works.
  • the air conditioner according to the embodiment of the sixth aspect of the present application includes an air conditioner indoor unit and an air conditioner outdoor unit.
  • the outdoor unit of the air conditioner is the outdoor unit of the air conditioner according to the embodiment of the fifth aspect of the present application.
  • the air conditioner may be a split wall-mounted air conditioner, and the air conditioner may also be a split floor-standing air conditioner.
  • the noise generated by the air conditioner during operation is small.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种轴流风机（100）、空调室外机及空调器，轴流风机（100）包括：轴流风轮（1）、用于驱动轴流风轮（1）转动的电机（2）和抵抗件（3）。轴流风轮（1）包括轮毂（11）和设在轮毂（11）的外周壁上的叶片（12），轮毂（11）具有轴孔，电机（2）包括电机本体（21）和连接在电机本体（21）上的电机轴（22），电机轴（22）与轴孔配合，抵抗件（3）设在轮毂（11）上且邻近电机轴（22）的自由端（221），抵抗件（3）的刚度大于轮毂（11）的刚度。

Description

轴流风机、空调室外机及空调器
相关申请的交叉引用
本申请基于申请号为201921166355.2、201921169879.7，申请日均为2019年7月23日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及空气处理设备领域，尤其是涉及一种轴流风机、空调室外机及空调器。
背景技术
相关技术中的轴流风轮，为了减轻风轮重量，减小电机的负荷，通常采用将叶片进行相关减薄处理等方案，风轮与电机轴之间通过电机轴和轮毂之间的配合定位，锁紧螺母紧固。由于风轮质量降低，风轮阻力大，在风轮旋转过程中叶片受到不同的轴向力，导致风轮在不平衡状态运转，又由于轴流风轮对抗不平衡激励的性能较弱，导致电机轴受到较大的不平衡激励，进而引起电机不平衡，电机产生较大噪音。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请提出一种轴流风机，该轴流风机工作时产生的噪音较小。
本申请还提出了一种具有上述轴流风机的空调室外机。
本申请还提出了一种具有上述空调室外机的空调器。
根据本申请第一方面实施例的轴流风机，包括：轴流风轮，所述轴流风轮包括轮毂和设在所述轮毂的外周壁上的叶片，所述轮毂具有轴孔；用于驱动所述轴流风轮转动的电机，所述电机包括电机本体和连接在所述电机本体上的电机轴，所述电机轴与所述轴孔配合；抵抗件，所述抵抗件设在所述轮毂上且邻近所述电机轴的自由端，所述抵抗件的刚度大于所述轮毂的刚度。
根据本申请的轴流风机，通过在轮毂上设置邻近电机轴的自由端的抵抗件且抵抗件的刚度大于轮毂的刚度，可以减少电机轴受到的不平衡激励，使得轴流风机工作时产生的噪音较小。
根据本申请的一些实施例，所述抵抗件的刚度大于所述电机轴的刚度。
根据本申请的一些实施例，所述抵抗件为金属件或陶瓷件。
根据本申请的一些实施例，所述抵抗件的刚度值范围为0.8×10 7-1.5×10 7N/m。
根据本申请的一些实施例，所述抵抗件呈环形且套设在所述电机轴的外周侧。
进一步地，所述轴孔的内周壁上形成有环形的安装凹槽，所述抵抗件容纳在所述安装凹槽内。
进一步地，所述安装凹槽沿轴向贯穿所述轮毂的邻近所述电机轴的自由端的端面。
可选地，所述抵抗件的邻近所述电机轴的自由端的端面与所述轮毂的邻近所述电机轴的自由端的端面齐平。
可选地，所述轴流风机包括：锁紧螺母，所述锁紧螺母与所述电机轴的自由端螺纹连接，所述锁紧螺母设在所述抵抗件的邻近所述电机轴的自由端的一侧，且所述锁紧螺母与所述抵抗件抵接。
可选地，所述抵抗件与所述锁紧螺母一体成型。
可选地，所述锁紧螺母在参考面的投影为第一投影，所述抵抗件在所述参考面的投影为第二投影，所述第一投影的外轮廓位于所述第二投影的外轮廓内，所述参考面垂直于所述电机轴的中心轴线。
可选地，所述抵抗件的内周壁与所述电机轴的外周壁之间间隔开。
可选地，所述抵抗件在所述电机轴的轴向方向上的长度为3-6mm。
根据本申请的一些实施例，所述抵抗件通过注塑镶嵌在所述轮毂内。
根据本申请第二方面实施例的空调室外机，包括：根据本申请上述第一方面实施例的轴流风机。
根据本申请的空调室外机，通过设置上述轴流风机，使得空调室外机工作时产生的噪音较小。
根据本申请第三方面实施例的空调器，包括空调室内机；空调室外机，所述空调室外机为根据本申请上述第二方面实施例的空调室外机。
根据本申请的空调器，通过设置上述空调室外机，使得空调器工作时产生的噪音较小。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本申请一些实施例的空调室外机的部分结构图；
图2是图1中轴流风机的剖视图；
图3是图2中A处的放大图；
图4是根据本申请另一些实施例的空调室外机的部分结构图；
图5是图4中轴流风机的剖视图；
图6是图5中B处的放大图；
图7是图5中的弹性缓冲件的剖视图。
附图标记：
轴流风机100；
轴流风轮1；轮毂11；叶片12；
电机2；电机本体21；电机轴22；自由端221；
抵抗件3；
锁紧螺母4；
弹性缓冲件5；第一缓冲部51；第二缓冲部52。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
下面参考附图描述根据本申请实施例的轴流风机100。
参考图1和图2，根据本申请第一方面实施例的轴流风机100，包括轴流风轮1、用于驱动轴流风轮1转动的电机2及抵抗件3。轴流风轮1包括轮毂11和设在轮毂11的外周壁上的叶片12，叶片12可以为多个(多个是指两个或两个以上)且多个叶片12沿轮毂11的周向间隔设置，轮毂11具有轴孔。电机2包括电机本体21和连接在电机本体21上的电机轴22，电机轴22与轴孔配合，使得电机2可以驱动轴流风轮1转动。
轴流风轮1工作时，电机2运转并带动轴流风轮1转动，轴流风机100产生轴向气流。
抵抗件3设在轮毂11上且邻近电机轴22的自由端221，抵抗件3的刚度大于轮毂11的刚度。通过设置刚度较大的抵抗件3，使得轴流风机100中远离电机本体21的一端的结构稳定性提高，提高了轴流风轮1的整体刚度，从而使得轴流风轮1抵抗不平衡力作用力增大。轮毂11向电机轴22传递不平衡激励时，由于结构稳定性提高，使得轮毂11受不平衡激励而产生的不平衡振动减少，进而使得轮毂11传递到电机轴22上的不平衡激励减少，电机受到的不平衡激励降低，进而降低不平衡激励引起的电机异音。
根据本申请的轴流风机，通过在轮毂11上设置邻近电机轴22的自由端221的抵抗件3且抵抗件3的刚度大于轮毂11的刚度，提高了轴流风轮1的整体刚度，从而使得轴流风轮 1抵抗不平衡力作用力增大，可以减少电机轴22受到的不平衡激励，使得轴流风机100工作时产生的噪音较小。
参考图2和图3，根据本申请的一些实施例，抵抗件3的刚度大于电机轴22的刚度，有利于增强轴流风机100中远离电机本体21的一端的结构稳定性，减少电机轴22受到的不平衡激励。
参考图3，根据本申请的一些实施例，抵抗件3为金属件或陶瓷件，使得抵抗件3具有较大的刚度和良好的结构强度，且易于加工。
参考图3，根据本申请的一些实施例，抵抗件3的刚度值范围为0.8×10 7-1.5×10 7N/m。若抵抗件3的刚度值不在上述范围内，不利于减少电机轴22受到的不平衡激励，轮毂11、电机轴22及抵抗件3连接不稳定。通过将抵抗件3的刚度值限定在合适范围内，在保证有效减少电机轴22受到的不平衡激励的同时，使得轮毂11、电机轴22及抵抗件3连接稳定。例如抵抗件3的刚度值为1×10 7N/m。
参考图2和图3，根据本申请的一些实施例，抵抗件3呈环形且套设在电机轴22的外周侧，结构简单，且抵抗件3结构均匀，避免轴流风机100工作时不均匀的抵抗件3产生新的不平衡激励。并使得与结构均匀的抵抗件3配合的轴流风轮1抵抗不平衡力作用力增大，减少电机轴22受到的不平衡激励，同时使得抵抗件3与电机轴22具有较高的连接强度。
参考图3，进一步地，轴孔的内周壁上形成有环形的安装凹槽，抵抗件3容纳在安装凹槽内，安装凹槽可以定位抵抗件3，方便抵抗件3的安装固定，且使得抵抗件3与轮毂11具有较高的连接强度。
参考图3，进一步地，安装凹槽沿轴向贯穿轮毂11的邻近电机轴22的自由端221的端面，便于加工安装凹槽，也便于抵抗件3的安装和更换。同时轴流风轮1处于不平衡状态转动时，轴流风轮1邻近自由端221的一端受到的不平衡力最大，安装凹槽邻近自由端221使得抵抗件3邻近自由端221，提高了轴流风轮1邻近自由端221的一端的整体刚度，轴流风轮1抵抗不平衡力作用力增大，有利于大幅减少电机轴22受到的不平衡激励。
参考图3，可选地，抵抗件3的邻近电机轴22的自由端221的端面与轮毂11的邻近电机轴22的自由端221的端面齐平，可以保证抵抗件3与轮毂11的接触面积，使得抵抗件3与轮毂11连接稳定，进而使得轴流风轮1抵抗不平衡力作用力增大，且使得产品美观。
参考图1、图2及图3，可选地，轴流风机100包括锁紧螺母4，锁紧螺母4与电机轴22的自由端221螺纹连接，使得锁紧螺母4与电机轴22相对固定。锁紧螺母4设在抵抗件3的邻近电机轴22的自由端221的一侧，且锁紧螺母4与抵抗件3抵接，通过安装凹槽的限位作用，使得抵抗件3在电机轴22的轴向方向上固定。锁紧螺母4锁紧时，锁紧螺母 4可以对抵抗件3和轮毂11提供轴向力，轮毂11轴向表面受到该轴向力，轴流风轮1在受到不平衡激励时，由于轴向力的存在，不平衡振动降低，电机轴22受到的不平衡激励降低，使得电机2因电机轴22不平衡引起的振动及噪音降低。
参考图3，可选地，抵抗件3与锁紧螺母4一体成型，使得抵抗件3与锁紧螺母4具有较高的连接强度，减少装配工序。
参考图3，可选地，锁紧螺母4在参考面的投影为第一投影，抵抗件3在参考面的投影为第二投影，第一投影的外轮廓位于第二投影的外轮廓内(例如锁紧螺母4在参考面的投影为环形，抵抗件3在参考面的投影为环形时，抵抗件3的外环半径大于锁紧螺母4的外环半径，参考图3中R2大于R1)，参考面垂直于电机轴22的中心轴线，保证了抵抗件3与锁紧螺母4的接触面积，使得抵抗件3受力均匀稳定，有利于减少轮毂11受到的不平衡力，同时防止锁紧螺母4与轮毂11之间悬空设置而不便清理积尘。
参考图3，可选地，抵抗件3的内周壁与电机轴22的外周壁之间间隔开，减少了轮毂11对电机轴22的直接不平衡激励传递，从而减少了电机轴22受到的不平衡激励。
参考图3，可选地，抵抗件3在电机轴22的轴向方向上的长度H1为3-6mm。若H1过小，不利于抵抗件3有效提高轴流风机100的整体刚度。若H1过大，抵抗件3的成本过高。通过将H1限定在合适范围内，使得在保证抵抗件3有效提高轴流风机100的整体刚度的同时，减少抵抗件3的成本。例如H1可以为4mm。
参考图3，根据本申请的一些实施例，抵抗件3通过注塑镶嵌在轮毂11内，使得抵抗件3与轮毂11相对固定，抵抗件3与轮毂11具有较强的连接强度，有利于降低轮毂11受不平衡激励影响产生的不平衡振动。
参考图1，根据本申请第二方面实施例的空调室外机，包括根据本申请上述第一方面实施例的轴流风机100。空调室外机工作时，由于轴流风机100产生的噪音减少，从而减少了空调室外机产生的噪音。
根据本申请的空调室外机，通过设置上述轴流风机100，使得空调室外机工作时产生的噪音较小。
根据本申请第三方面实施例的空调器，包括空调室内机和空调室外机。空调室外机为根据本申请上述第二方面实施例的空调室外机。空调器可以为分体壁挂式空调器，空调器也可以为分体落地式空调器。
根据本申请的空调器，通过设置上述空调室外机，使得空调器工作时产生的噪音较小。
下面参照图4-图7描述根据本发明另一些实施例的轴流风机100。
参考图4及图5，根据本申请第四方面实施例的轴流风机100，包括轴流风轮1、用于 驱动轴流风轮1转动的电机2及弹性缓冲件5。轴流风轮1包括轮毂11和设在轮毂11的外周壁上的叶片12，叶片12可以为多个(多个是指两个或两个以上)且多个叶片12沿轮毂11的周向间隔设置，轮毂11具有轴孔。电机2包括电机本体21和连接在电机本体21上的电机轴22，电机轴22与轴孔配合，从而使得电机2可以驱动轴流风轮1转动。
轴流风机100工作时，电机2运转并带动轴流风轮1转动，轴流风机100产生轴向气流。轴流风轮1旋转过程中，由于叶片12质量低，叶片12受到的阻力大，使得叶片12受到不平衡激励，叶片12将不平衡激励传递到轮毂11上。轮毂11在不平衡激励的影响下与电机轴22形成相对位移，并将不平衡激励传递至电机轴22。
弹性缓冲件5设在电机轴22上，弹性缓冲件5的至少一部分位于电机轴22的外周壁和轴孔的内周壁之间，弹性缓冲件5位于电机轴22的外周壁和轴孔的内周壁之间的部分在电机轴22的径向方向上可弹性变形，通过位于轮毂11与电机轴22之间弹性缓冲件5的弹性变形，使得轮毂11与电机轴22之间的相对位移减少，弹性缓冲件5可以吸收部分不平衡激励，进而减少轮毂11传递至电机轴22的不平衡激励，从而可以减少电机轴22受到的不平衡激励，减少电机2产生的噪音。例如，可以是弹性缓冲件5的一部分位于电机轴22的外周壁和轴孔的内周壁之间。或者，可以是弹性缓冲件5全部位于电机轴22的外周壁和轴孔的内周壁之间。
根据本申请的轴流风机100，通过设置弹性缓冲件5且弹性缓冲件5位于电机轴22的外周壁和轴孔的内周壁之间的部分在电机轴22的径向方向上可弹性变形，使得轮毂11与电机轴22之间的相对位移减少，弹性缓冲件5可以吸收一部分不平衡激励，电机轴22受到的不平衡激励降低，从而使得轴流风机100工作时产生的噪音较小。
参考图6，根据本申请的一些实施例，弹性缓冲件5邻近电机轴22的自由端221。轴流风轮1处于不平衡状态转动时，自由端221受到的不平衡激励程度最大，将弹性缓冲件5设在此处有利于大幅减少电机轴22受到的不平衡激励。
参考图5和图6，根据本申请的一些可选实施例，弹性缓冲件5包括呈圆筒形的第一缓冲部51。第一缓冲部51套设在电机轴22上，使得第一缓冲部51结构均匀，避免轴流风机100工作时不均匀的第一缓冲部51产生新的不平衡激励。且第一缓冲部51的至少一部分位于电机轴22的外周壁和轴孔的内周壁之间，使得弹性缓冲件5的结构简单，便于加工弹性缓冲件5，并使得弹性缓冲件5可以在电机轴22的周向方向上全面减少电机轴22受到的不平衡激励。例如，可以是第一缓冲部51的一部分位于电机轴22的外周壁和轴孔的内周壁之间。或者，可以是第一缓冲部51全部位于电机轴22的外周壁和轴孔的内周壁之间。
参考图5、图6和图7，可选地，电机轴22的外周壁和轴孔的内周壁之间限定出用于 容纳第一缓冲部51的容纳腔，容纳腔的邻近电机轴22的自由端221的一侧敞开。由此，通过在电机轴22的外周壁和轴孔的内周壁之间限定出上述容纳腔，方便第一缓冲部51安装固定在电机轴22的外周壁和轴孔的内周壁之间，并且使得容纳腔的邻近电机轴22的自由端221的一侧敞开，方便将弹性缓冲件5的第一缓冲部51通过上述容纳腔的敞开端插入至该容纳腔内。
参考图7，进一步地，在由电机轴22的自由端221至电机本体21的方向上，第一缓冲部51的径向厚度逐渐减小，便于将第一缓冲部51插入容纳腔内，且使得第一缓冲部51可以与容纳腔过盈配合，提高电机轴22、弹性缓冲件5及轮毂11的连接稳定性，有利于第一缓冲部51吸收不平衡激励。
具体地，第一缓冲部51的内周面沿电机轴22的轴向延伸，在由电机本体21至电机轴22的自由端221的方向上，第一缓冲部51的外周面朝向远离电机轴22的方向倾斜延伸，便于第一缓冲部51与容纳腔过盈配合，也降低了加工第一缓冲部51的工艺难度。
参考图7，进一步地，第一缓冲部51的外周面的斜度M(参考图7中，斜度M为第一缓冲部51的远离电机轴22的外周壁与第一缓冲部51的邻近电机轴22的内周壁的夹角α的正切值)范围为1/11-1/8。若斜度M过小，可能造成第一缓冲部51与容纳腔的过盈配合不紧密。若斜度M过大，难以将第一缓冲部51插入容纳腔中，造成装配困难。通过将斜度M限定在合适范围内，使得在保证第一缓冲部51与容纳腔有效过盈配合的同时，便于第一缓冲部51与容纳腔装配。例如斜度M可以为1/10。
参考图5和图6，根据本申请的一些可选实施例，在电机轴22的轴向方向上，第一缓冲部51的远离电机本体21的一端延伸至轴孔外，保证了第一缓冲部51与轮毂11和电机轴22有足够的接触面积，使得第一缓冲部51可以正常吸收轮毂11对电机轴22的不平衡激励。同时也便于第一缓冲部51与容纳腔的装配，使得更换和清洁第一缓冲部51时第一缓冲部51易于取出。
参考图5、图6和图7，根据本申请的一些可选实施例，弹性缓冲件5包括第二缓冲部52。第二缓冲部52形成在第一缓冲部51的远离电机本体21的一端，第二缓冲部52连接在第一缓冲部51的外周壁上且沿第一缓冲部51的周向延伸，第二缓冲部52与轮毂11相连或抵接，增大了弹性缓冲件5与轮毂11及电机轴22的接触面积，提高弹性缓冲件5与轮毂11及电机轴22之间的连接强度。
参考图4、图5和图6，可选地，轴流风机包括锁紧螺母4，锁紧螺母4与电机轴22的自由端221螺纹配合，使得锁紧螺母4与电机轴22相对固定，且锁紧螺母4将第二缓冲部52压紧在轮毂11上，使得锁紧螺母4、第二缓冲部52及轮毂11连接稳定。在锁紧螺母4锁紧时，轮毂11轴向表面受到一个轴向力，轮毂11在受到不平衡激励时，由于轴向力的 存在，轮毂11受到的不平衡激励降低，进而传递到电机轴22上的不平衡激励降低。
参考图4、图5和图6，进一步地，锁紧螺母4在参考面的投影位于第二缓冲部52在参考面的投影内(例如锁紧螺母4在参考面的投影为环形，第二缓冲部52在参考面的投影为环形时，第二缓冲部52的外环半径大于锁紧螺母4的外环半径，参考图6中R3大于R1)，参考面垂直于所述电机轴22的中心轴线，使得第二缓冲部52在参考面上有较大的面积，有利于第二缓冲部52吸收不平衡激励，同时防止锁紧螺母4与轮毂11之间悬空设置而不便清理积尘。
参考图7，可选地，第一缓冲部51的轴向长度H2与第二缓冲部52的轴向长度H3的比值范围为2-5。若第一缓冲部51的轴向长度H2与第二缓冲部52的轴向长度H3的比值过小，H2过小时第一缓冲部吸收不平衡激励的性能下降且第一缓冲部51与容纳槽的连接强度过低；H3过大时，第二缓冲部52成本过高且影响美观。若第一缓冲部51的轴向长度H2与第二缓冲部52的轴向长度H3的比值过大，H2过大时，难以将第一缓冲部51安装在容纳槽内；H3过小时，第二缓冲部52吸收不平衡激励的性能下降。通过将第一缓冲部51的轴向长度H2与第二缓冲部52的轴向长度H3的比值限定在合适范围内，使得弹性缓冲件5具有良好吸收不平衡激励性能的同时，便于加工弹性缓冲件5及容纳槽。例如，第一缓冲部51的轴向长度H2与第二缓冲部52的轴向长度H3的比值可以为3。
参考图7，可选地，第二缓冲部52的轴向长度H3的范围为5-8mm。若H3过小，第二缓冲部52吸收不平衡激励的性能下降。若H3过大，第二缓冲部52成本过高且影响美观。通过将H3限定在合适范围内，使得在保证第二缓冲部52正常吸收不平衡激励的同时，减少第二缓冲部52的成本并使得产品美观。例如H3可以为6mm。
参考图1-图4，根据本申请的一些实施例，弹性缓冲件5为橡胶件或塑胶件，使得弹性缓冲件5具有良好的弹性和耐磨性能。
参考图4-图7，可选地，弹性缓冲件5的硬度范围为30-35HRC。若弹性缓冲件5的硬度过大，弹性缓冲件5弹性较差。若弹性缓冲件5的硬度过小，弹性缓冲件5的结构强度过低。通过将弹性缓冲件5的硬度限定在合适范围内，使得弹性缓冲件5具有良好的弹性和结构强度。例如，弹性缓冲件5的硬度为33HRC。
参考图4，根据本申请第五方面实施例的空调室外机，包括根据本申请上述第四方面实施例的轴流风机100。空调室外机工作时，由于轴流风机100产生的噪音减少，从而减少了空调室外机产生的噪音。
根据本申请的空调室外机，通过设置上述的轴流风机100，使得空调室外机工作时产生的噪音较小。
根据本申请第六方面实施例的空调器，包括空调室内机和空调室外机。空调室外机为 根据本申请上述第五方面实施例的空调室外机。空调器可以为分体壁挂式空调器，空调器也可以为分体落地式空调器。
根据本申请的空调器，通过设置上述空调室外机，使得空调器工作时产生的噪音较小。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (16)

  1. 一种轴流风机，其特征在于，包括：
    轴流风轮，所述轴流风轮包括轮毂和设在所述轮毂的外周壁上的叶片，所述轮毂具有轴孔；
    用于驱动所述轴流风轮转动的电机，所述电机包括电机本体和连接在所述电机本体上的电机轴，所述电机轴与所述轴孔配合；
    抵抗件，所述抵抗件设在所述轮毂上且邻近所述电机轴的自由端，所述抵抗件的刚度大于所述轮毂的刚度。
  2. 根据权利要求1所述的轴流风机，其特征在于，所述抵抗件的刚度大于所述电机轴的刚度。
  3. 根据权利要求1或2所述的轴流风机，其特征在于，所述抵抗件为金属件或陶瓷件。
  4. 根据权利要求1-3中任一项所述的轴流风机，其特征在于，所述抵抗件的刚度值范围为0.8×10 7-1.5×10 7N/m。
  5. 根据权利要求1-4中任一项所述的轴流风机，其特征在于，所述抵抗件呈环形且套设在所述电机轴的外周侧。
  6. 根据权利要求5所述的轴流风机，其特征在于，所述轴孔的内周壁上形成有环形的安装凹槽，所述抵抗件容纳在所述安装凹槽内。
  7. 根据权利要求6所述的轴流风机，其特征在于，所述安装凹槽沿轴向贯穿所述轮毂的邻近所述电机轴的自由端的端面。
  8. 根据权利要求7所述的轴流风机，其特征在于，所述抵抗件的邻近所述电机轴的自由端的端面与所述轮毂的邻近所述电机轴的自由端的端面齐平。
  9. 根据权利要求7所述的轴流风机，其特征在于，包括：锁紧螺母，所述锁紧螺母与所述电机轴的自由端螺纹连接，所述锁紧螺母设在所述抵抗件的邻近所述电机轴的自由端的一侧，且所述锁紧螺母与所述抵抗件抵接。
  10. 根据权利要求9所述的轴流风机，其特征在于，所述抵抗件与所述锁紧螺母一体成型。
  11. 根据权利要求9所述的轴流风机，其特征在于，所述锁紧螺母在参考面的投影为第一投影，所述抵抗件在所述参考面的投影为第二投影，所述第一投影的外轮廓位于所述第二投影的外轮廓内，所述参考面垂直于所述电机轴的中心轴线。
  12. 根据权利要求5所述的轴流风机，其特征在于，所述抵抗件的内周壁与所述电机轴的外周壁之间间隔开。
  13. 根据权利要求5所述的轴流风机，其特征在于，所述抵抗件在所述电机轴的轴向方向上的长度为3-6mm。
  14. 根据权利要求1-13中任一项所述的轴流风机，其特征在于，所述抵抗件通过注塑镶嵌在所述轮毂内。
  15. 一种空调室外机，其特征在于，包括：根据权利要求1-14中任一项所述的轴流风机。
  16. 一种空调器，其特征在于，包括：
    空调室内机；
    空调室外机，所述空调室外机为根据权利要求15所述的空调室外机。
PCT/CN2019/101734 2019-07-23 2019-08-21 轴流风机、空调室外机及空调器 WO2021012341A1 (zh)

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