Fan blade assembly, fan and air conditioner

Abstract

The utility model discloses a kind of fan blade assembly, fan and air conditioner, it is related to fan technical field, wherein, fan blade assembly includes fan blade, pivot and fan blade connecting structure, the fan blade has shaft hole, the pivot is arranged in the shaft hole, the pivot is used to the fan blade output torque, the fan blade connecting structure is arranged in the pivot, the fan blade connecting structure is used to limit the fan blade moves along pivot axial direction, the fan blade connecting structure includes first buffer, second buffer, first connecting piece and second connecting piece, the first connecting piece and second connecting piece are sleeved in the pivot, and respectively located the axial two sides of the fan blade, the first buffer is at least partially located between the fan blade and the first connecting piece, the second buffer is at least partially located between the fan blade and the second connecting piece;The technical scheme provided by the utility model can avoid resonance noise when fan blade assembly operates.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a fan blade assembly, a fan, and an air conditioner. Background Technology

[0002] In the existing technology, during the speed-up process of the motor of the fan used in the outdoor unit of the air conditioner, the electromagnetic excitation force generated by the motor can easily induce resonance in the fan blade structure, resulting in resonance noise problems in the fan blade. Utility Model Content

[0003] The main purpose of this invention is to provide a fan blade assembly, a fan, and an air conditioner, which aims to avoid resonance noise generated during the operation of the fan blade assembly.

[0004] To achieve the above objectives, the present invention provides a fan blade assembly comprising:

[0005] The fan blade has a shaft hole;

[0006] A rotating shaft, passing through the shaft hole, is used to output torque to the fan blade; and

[0007] A fan blade connection structure is provided on the rotating shaft. The fan blade connection structure is used to restrict the fan blade from moving axially along the rotating shaft. The fan blade connection structure includes a first buffer, a second buffer, a first connector, and a second connector. The first connector and the second connector are sleeved on the rotating shaft and are respectively located on both sides of the fan blade along the axial direction. The first buffer is at least partially located between the fan blade and the first connector, and the second buffer is at least partially located between the fan blade and the second connector.

[0008] In one embodiment, the first buffer is disposed between the first connector and the fan blade; and / or, the second buffer is disposed between the second connector and the fan blade.

[0009] In one embodiment, the first buffer and / or the second buffer are sleeved and installed on the rotating shaft;

[0010] And / or, the first buffer and / or the second buffer are configured as vibration damping pads.

[0011] In one embodiment, the first buffer is sleeved and installed on the first connector, and the first buffer has a first buffer portion located between the first connector and the fan blade.

[0012] In one embodiment, the first buffer portion is a damping buffer portion made of damping material; or, the first buffer member is a damping buffer member made of damping material.

[0013] In one embodiment, the second buffer is sleeved and installed on the outer surface of the second connector, and the second buffer has a second buffer portion located between the second connector and the fan blade.

[0014] In one embodiment, the second buffer portion is a damping buffer portion made of damping material; or, the second buffer member is a damping buffer member made of damping material.

[0015] In one embodiment, the first connector is configured as a snap ring, and the second connector is configured as a nut.

[0016] In one embodiment, the first connector is configured as a bushing fitted onto the rotating shaft; or, the first connector is configured as a shoulder step, the shoulder step being integrally formed on the rotating shaft and facing the fan blade.

[0017] This utility model also proposes a fan, comprising:

[0018] The fan blade assembly as described above; and

[0019] An electric motor, the output end of which is connected to the shaft of the fan blade assembly.

[0020] This utility model also proposes an air conditioner, comprising:

[0021] Air conditioner indoor unit;

[0022] Air conditioner outdoor unit; and

[0023] The fan described above is located in the outdoor unit of the air conditioner.

[0024] The technical solution of this utility model is to set a fan blade connection structure on the rotating shaft, and the fan blade connection structure includes a first buffer, a second buffer, a first connector, and a second connector. The first connector and the second connector are sleeved and installed on the rotating shaft and are respectively located on both sides of the fan blade axis to restrict the movement of the fan blade along the rotating shaft axis. The first buffer is at least partially located between the fan blade and the first connector, and the second buffer is at least partially located between the fan blade and the second connector. When the rotating shaft is connected to the motor, it can isolate the electromagnetic excitation force transmitted from the rotating shaft to the fan blade through the first connector, and it can also isolate the electromagnetic excitation force transmitted from the rotating shaft to the fan blade through the second connector, so as to avoid the fan blade resonance caused by the fan blade's fixed frequency and the electromagnetic excitation force being at the same frequency, thereby avoiding resonance noise generated during the operation of the fan blade assembly. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of a fan embodiment provided by this utility model;

[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 for Figure 2 A schematic diagram of another embodiment of the first buffer component;

[0029] Figure 4 for Figure 3 A schematic diagram of the installation angle of the first buffer component in the middle;

[0030] Figure 5 for Figure 3 Another angle installation diagram of the first buffer component;

[0031] Figure 6 for Figure 2 A schematic diagram of another embodiment of the second buffer component;

[0032] Figure 7 A schematic diagram of another embodiment of the fan blade assembly provided by this utility model.

[0033] Explanation of icon numbers:

[0034] 100. Fan; 10. Fan blade assembly; 11. Fan blade; 111. Shaft hole; 12. Rotating shaft; 13. Fan blade connection structure; 131. First buffer component; 131a. First buffer part; 132. First buffer component; 132a. Second buffer part; 133. First connecting component; 133a. Bayonet; 134. Second connecting component; 20. Motor.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] During the acceleration process of the motor in the outdoor unit of an air conditioner, the electromagnetic excitation force of the sixth harmonic frequency can easily induce structural resonance, leading to sixth harmonic noise. There are two common methods to solve this problem: one is to reduce the torque fluctuation of the motor, but this can easily lead to a decrease in performance; the other is to adopt a frequency offset design in the structure, but because the motor has a wide speed range, a completely frequency offset design is very difficult, which will either cause structural strength problems or lead to a significant increase in structural costs.

[0040] This utility model proposes a wind turbine assembly 10.

[0041] Please see Figures 1 to 3In one embodiment of the present invention, the fan blade assembly 10 includes a fan blade 11, a rotating shaft 12, and a fan blade connecting structure 13. The fan blade 11 has a shaft hole 111, and the rotating shaft 12 passes through the shaft hole 111. The rotating shaft 12 is used to output torque to the fan blade 11. The fan blade connecting structure 13 is disposed on the rotating shaft 12 and is used to restrict the fan blade 11 from moving axially along the rotating shaft 12. The fan blade connecting structure 13 includes a first buffer member 131, a second buffer member 132, a first connector 133, and a second connector 134. The first connector 133 and the second connector 134 are sleeved on the rotating shaft 12 and are respectively located on both axial sides of the fan blade 11. The first buffer member 131 is at least partially located between the fan blade 11 and the first connector 133, and the second buffer member 132 is at least partially located between the fan blade 11 and the second connector 134.

[0042] The first connecting member 133 and the second connecting member 134 are located on both sides of the fan blade 11 along its axial direction. Since the first connecting member 133 and the second connecting member 134 can be sleeved and fixed to the rotating shaft 12, the movement of the fan blade 11 along its axial direction can be restricted. The first buffer member 131 can at least partially fit into the first connecting member 133 and the fan blade 11, and the second buffer member 132 can at least partially fit into the second connecting member 134 and the fan blade. The fan blade 11 may include a hub and a plurality of blades disposed around the hub. The shaft hole 111 is opened in the hub. The parts of the fan blade 11 that fit into the first buffer member 131 and the second buffer member 132 may be the two sides of the hub. The first buffer member 131 may be a damping buffer material, or a rubber material, or other material with buffering and vibration isolation functions, which is not specifically limited here.

[0043] In this invention, the rotating shaft 12 can be connected to the output shaft end of the motor 20, or the rotating shaft 12 can be the output end of the motor 20, and the motor 20 can be a three-phase motor 20. When the motor 20 outputs torque to the rotating shaft 12, the periodic electromagnetic excitation force generated by the motor rotor assembly will be transmitted to the fan blade connection structure 13 through the rotating shaft 12, and then transmitted to the fan blade through the fan blade connection structure 13. Based on the structure of the motor 20, the main harmonic frequency of the electromagnetic excitation force will exhibit a characteristic of 6 times the fundamental frequency of the motor. During the acceleration process of the motor 20, the periodic electromagnetic excitation force increases rapidly, which easily produces the same frequency as the natural frequency of the fan blade, thereby exciting the fan blade resonance.

[0044] To this end, the present invention provides a first buffer 131 and a second buffer 132, such that the first buffer 131 is at least partially located between the first connector 133 and the fan blade 11, and the second buffer 132 is at least partially located between the second connector 134 and the fan blade. The first buffer 131 absorbs the electromagnetic excitation force, and the second buffer 132 absorbs the electromagnetic excitation force, isolating the path of the rotating shaft 12 transmitting the electromagnetic excitation force to the fan blade through the first connector 133 and the path of the rotating shaft 12 transmitting the electromagnetic excitation force to the fan blade through the second connector 134. This avoids the resonance caused by the electromagnetic excitation force being at the same frequency as the fan blade, thus avoiding resonance noise.

[0045] The technical solution of this utility model is to set a fan blade connection structure 13 on the rotating shaft 12, and the fan blade connection structure 13 includes a first buffer 131, a second buffer 132, a first connector 133, and a second connector 134. The first connector 133 and the second connector 134 are sleeved and installed on the rotating shaft 12 and are respectively located on both sides of the fan blade axis to restrict the movement of the fan blade along the axial direction of the rotating shaft 12. The first buffer 131 is at least partially located between the fan blade 11 and the first connector 133, and the second buffer 132 is at least partially located between the fan blade 11 and the second connector 134. When the rotating shaft 12 is connected to the motor 20, it can isolate the electromagnetic excitation force transmitted from the rotating shaft 12 to the fan blade 11 through the first connector 133, and it can also isolate the electromagnetic excitation force transmitted from the rotating shaft 12 to the fan blade through the second connector 134, so as to avoid the fan blade resonance caused by the fan blade fixed frequency and the electromagnetic excitation force being at the same frequency, thereby avoiding the generation of resonance noise when the fan blade assembly 10 is running.

[0046] The structure of the first buffer 131 and the second buffer 132 will be described below. Figure 2 Optionally, the first buffer 131 is disposed between the first connector 133 and the fan blade 11. When the first buffer 131 is disposed between the first connector 133 and the fan blade 11, the first buffer 131 can be a gasket, which can be inserted into the gap between the first connector 133 and the fan blade 11 on one side and contact both respectively. Alternatively, the first buffer 131 can be a washer, which can be sleeved onto the rotating shaft 12 during blade installation, and after the blade installation is completed, the washer is located between the first connector 133 and the fan blade 11.

[0047] Alternatively, the second buffer 132 can also be disposed between the second connector 134 and the fan blade 11. Optionally, the second buffer 132 is disposed between the second connector 134 and the fan blade 11. The second buffer 132 can be a gasket inserted between the first connector 133 and the other side of the fan blade 11, or it can be a washer sleeved on the rotating shaft 12 and located between the second connector 134 and the fan blade 11; no specific limitation is made here.

[0048] To ensure a more secure installation of the first buffer element 131 on the fan blade assembly 10, optionally, the first buffer element 131 can be sleeved and installed on the rotating shaft 12. The first buffer element 131 can be configured as a vibration damping pad, and can be sleeved on the rotating shaft 12 during fan blade installation to prevent the first buffer element 131 from falling off the rotating shaft 12. Alternatively, the second buffer element 132 can also be sleeved and installed on the rotating shaft 12. The second buffer element 132 can also be configured as a vibration damping pad, and can be sleeved on the rotating shaft 12 during fan blade installation to prevent the second buffer element 132 from falling off the rotating shaft 12. This ensures the secure installation of the first buffer element 131 and the second buffer element 132 on the fan blade assembly 10.

[0049] Alternatively, to facilitate the installation of the first buffer 131 on the rotating shaft 12, the first buffer 131 can be integrally formed with the first connecting member 133, such as... Figure 3 As shown, in one embodiment, the first buffer 131 is sleeved and installed on the first connector 133. The first buffer 131 has a first buffer portion 131a, which is located between the first connector 133 and the fan blade 11.

[0050] The first connector 133 may have an outer annular surface, a first outer side surface, a second inner side surface, and an inner mounting hole. The outer annular surface is disposed around the inner mounting hole, and the first and second inner side surfaces are located on opposite sides of the outer annular surface. The first outer side surface faces the fan blade, and the second outer side surface faces away from the fan blade. The first buffer 131 may be sleeved onto the outer annular surface and has a first buffer portion 131a located on the first outer side surface. The first buffer portion 131a can respectively conform to the first outer side surface and the fan blade.

[0051] Alternatively, the first buffer member 131a can have a second buffer portion 132a located on the second outer side, which can make the first buffer member 131a more securely installed on the first connector 133.

[0052] In this way, while isolating the first connecting member 133 from transmitting electromagnetic excitation force to the fan blade 11 through the first buffer member 131, the number of actual assembly parts of the fan blade assembly 10 can be reduced by the integrated installation of the first buffer member 131 and the first connecting member 133, the assembly process of the fan blade assembly 10 can be simplified, thereby improving the assembly efficiency of the fan blade assembly 10.

[0053] Optionally, the first buffer part 131a is a damping buffer part made of damping material; or, the first buffer member 131 is a damping buffer member made of damping material. Since the first buffer part 131a needs to play a vibration isolation and buffering role between the first connecting member 133 and the fan blade 11, the first buffer part 131a can be set as a damping buffer part made of damping material to achieve buffering and vibration isolation. Of course, the first buffer member 131 can also be made entirely of damping material, making the first buffer member 131 a damping buffer member, which can simplify the overall production cost of the first buffer member.

[0054] Furthermore, to facilitate the installation of the second buffer 132, the second buffer 132 can also be integrally set with the second connector 134. Optionally, the second buffer 132 is sleeved and installed on the outer surface of the second connector 134. The second buffer 132 has a second buffer portion 132a, which is located between the second connector 134 and the fan blade 11.

[0055] The second connector 134 may also have an outer ring surface, a first outer side surface, and a second outer side surface. The second buffer 132 may be sleeved and installed on the outer ring surface. The second buffer part 132a of the second buffer 132 may be located between the first outer side surface and the fan blade 11.

[0056] In this way, the number of actual assembly parts of the wind turbine assembly 10 can be reduced and the assembly process can be simplified by pre-installing the second buffer 132 and the second connector 134, or by installing the second buffer 132 and the second connector 134 as a whole. When the first buffer 131 adopts the same assembly method, the assembly efficiency of the wind turbine assembly 10 can be further improved.

[0057] Similar to the first buffer 131, when the second buffer 132 adopts the above assembly method, the second buffer part 132a is a damping buffer part made of damping material; in this way, the damping buffer part can realize the buffering and vibration isolation between the second connector 134 and the fan blade 11. Alternatively, the second buffer 132 is a damping buffer part made of damping material. By making the second buffer 132 entirely made of damping material, the overall production cost of the second buffer 132 can be simplified.

[0058] The structure of the first connector 133 and the second connector 134 is described below, such as... Figure 2 , Figure 3 , Figure 5 As shown, the first connector 133 is configured as a snap ring, and the second connector 134 is configured as a nut.

[0059] The rotating shaft 12 may have a radially arranged slot, the retaining spring has a retaining opening 133a, the retaining opening 133a can be engaged in the slot, the rotating shaft 12 may have a threaded groove on the side away from the slot, the nut can be threaded into the threaded groove, and the fan blade 11 is located between the retaining spring and the nut to achieve axial limiting of the fan blade 11.

[0060] When the shaft 12 is mounted on the output end of the motor 20, the nut can be located on the side of the shaft 12 away from the motor 20, and the snap ring can be located on the side of the shaft 12 closer to the motor 20.

[0061] In other embodiments, the first connecting member 133 may be replaced by other connecting members with axial positioning function instead of a retaining ring. Optionally, the first connecting member 133 is configured as a bushing sleeved on the rotating shaft 12. The bushing sleeve may be sleeved and installed on the rotating shaft 12, and the first buffer member 131 may abut against both the bushing sleeve and the fan blade, or the first buffer member 131 may be sleeved on the bushing and have a first buffer portion 131a located between the bushing sleeve and the fan blade.

[0062] Alternatively, the first connector 133 may be configured as a shoulder step, which is integrally formed on the rotating shaft 12 and faces the fan blade 11. When the first connector 133 is configured as a shoulder step, the first buffer 131 may abut against both the shoulder step and the fan blade.

[0063] This utility model also proposes a fan 100, which includes a motor 20 and a fan blade assembly 10. The specific structure of the fan blade assembly 10 is as described in the above embodiments. Since this fan 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The output end of the motor 20 is connected to the rotating shaft 12 of the fan blade assembly 10.

[0064] In this utility model, the output shaft of the motor 20 can be connected to the rotating shaft 12 via a coupling to output torque to the rotating shaft 12, thereby driving the fan blade 11 to rotate. Alternatively, the rotating shaft 12 can be directly set as the output shaft of the motor 20, and the fan blade 11 can be directly installed on the output shaft of the motor 20. The motor 20 can directly output torque to the fan blade through the output shaft. No limitation is made here.

[0065] This utility model also proposes an air conditioner, including an indoor unit, an outdoor unit, and the aforementioned fan 100, wherein the fan 100 is located in the outdoor unit.

[0066] Among them, the fan 100 can be the air supply fan 100 of the outdoor unit of the air conditioner. This setting can reduce the noise generated by the fan 100 during the operation of the outdoor unit of the air conditioner, so that the outdoor unit of the air conditioner can operate with lower noise and reduce the noise disturbance generated during the operation of the air conditioner.

[0067] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A fan blade assembly, characterized in that, include: The fan blade has a shaft hole; A rotating shaft passes through the shaft hole and is used to output torque to the fan blade; as well as A fan blade connection structure is provided on the rotating shaft. The fan blade connection structure is used to restrict the fan blade from moving axially along the rotating shaft. The fan blade connection structure includes a first buffer, a second buffer, a first connector, and a second connector. The first connector and the second connector are sleeved on the rotating shaft and are respectively located on both sides of the fan blade along the axial direction. The first buffer is at least partially located between the fan blade and the first connector, and the second buffer is at least partially located between the fan blade and the second connector.

2. The fan blade assembly as described in claim 1, characterized in that, The first buffer is disposed between the first connector and the fan blade; and / or, the second buffer is disposed between the second connector and the fan blade.

3. The fan blade assembly as described in claim 2, characterized in that, The first buffer and / or the second buffer are sleeved and installed on the rotating shaft; And / or, the first buffer and / or the second buffer are configured as vibration damping pads.

4. The fan blade assembly as described in claim 1, characterized in that, The first buffer is sleeved and installed on the first connector. The first buffer has a first buffer part, which is located between the first connector and the fan blade.

5. The fan blade assembly as described in claim 4, characterized in that, The first buffer part is a damping buffer part made of damping material; or, the first buffer member is a damping buffer member made of damping material.

6. The fan blade assembly as described in claim 1, characterized in that, The second buffer is sleeved and installed on the outer surface of the second connector. The second buffer has a second buffer portion, which is located between the second connector and the fan blade.

7. The fan blade assembly as described in claim 6, characterized in that, The second buffer is a damping buffer made of damping material; or, the second buffer is a damping buffer made of damping material.

8. The wind turbine assembly as described in any one of claims 2 to 7, characterized in that, The first connecting member is configured as a snap ring, and the second connecting member is configured as a nut.

9. The wind turbine assembly as described in any one of claims 2 to 7, characterized in that, The first connector is configured as a bushing fitted onto the rotating shaft; or, the first connector is configured as a shoulder step, which is integrally formed on the rotating shaft and faces the fan blade.

10. A fan, characterized in that, include: The wind turbine assembly as described in any one of claims 1 to 9; as well as An electric motor, the output end of which is connected to the shaft of the fan blade assembly.

11. An air conditioner, characterized in that, include: Air conditioner indoor unit; Air conditioner outdoor unit; as well as The fan as described in claim 10 is located in the outdoor unit of the air conditioner.

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