Fan blade structure with adjustable fan blade inclination angle and axial flow fan

Abstract

The present invention provides a fan blade structure and an axial flow fan with adjustable fan blade inclination angle. The fan blade structure is arranged on a rotating shaft, and the rotating shaft is arranged on a shaft seat. The fan blade structure includes a rotating disk, a fan blade, a lifting mechanism and a connecting rod mechanism. The fan blade structure and the axial flow fan with adjustable fan blade inclination angle provided by the present invention use the fan blade structure to adjust the inclination angle of the fan blade, so that the static pressure generated at the fan blade changes, and finally the air volume is adjusted to meet the requirements of different working conditions and different units, increase the adjustment accuracy and the control accuracy of the air volume, and realize stepless adjustment of the fan blade inclination angle, realize the controllability and reliability of the adjustment, simplify the adjustment process, and the rotating table can realize the simultaneous adjustment of all the fan blades, which overcomes the problem in the prior art that the different inclination angles of the fan blades after adjustment affect the air outlet effect of the fan, broadens the air volume control range, improves the versatility of the fan, and reduces the production cost.

Description

Technical Field

[0001] The invention relates to the technical field of fan structures, and in particular to a fan blade structure with adjustable fan blade inclination angle and an axial flow fan. Background Art

[0002] Existing air conditioner outdoor units generally use axial flow fans as condenser heat dissipation devices. The axial flow fans exhaust air outward, allowing air to pass through the condenser fins and take away heat to achieve a heat exchange effect. Due to different ambient temperatures and refrigeration requirements, the air volume of the axial flow fan also needs to change. However, the shape and inclination angle of the fan blades are fixed, and the air volume of the axial flow fan cannot be universal for air conditioner outdoor units with different working conditions and specifications. If blades matching different working conditions are required, frequent mold opening is required, which greatly increases the production cost and is not suitable for small-scale production. Summary of the invention

[0003] In order to solve the technical problem that the shape and inclination angle of the fan blades in the prior art are not fixed and cannot be universally used, a fan blade structure and an axial flow fan with adjustable fan blade inclination angle are provided, which can adjust the air volume according to working conditions and specification requirements.

[0004] A fan blade structure is arranged on a rotating shaft, and the rotating shaft is arranged on a shaft seat. The fan blade structure comprises:

[0005] A rotating disk is disposed on the rotating shaft and rotates together with the rotating shaft;

[0006] A fan blade, wherein the fan blade is arranged on the rotating disk;

[0007] A lifting mechanism is arranged on the shaft seat and has a lifting state that can move freely along the axis direction of the rotating shaft;

[0008] The connecting rod mechanism is arranged between the lifting mechanism and the fan blade, and in the lifting state, the connecting rod mechanism adjusts the inclination angle of the fan blade.

[0009] The connecting rod mechanism includes a connecting rod and a cam, wherein the cam is arranged on the fan blade, one end of the connecting rod is hinged to the cam, and the other end is hinged to the lifting mechanism, and in the lifting state, the connecting rod drives the cam to rotate.

[0010] The lifting mechanism includes a rotating table, a lifting platform and a bearing. The lifting platform is arranged on the shaft seat, the rotating table is arranged on the rotating shaft, and the bearing is arranged between the lifting platform and the rotating table. In the lifting state, the lifting platform drives the rotating table to move freely along the axial direction of the rotating shaft through the bearing.

[0011] The lifting mechanism further comprises a driving member, which is arranged on the shaft seat and drives the lifting platform to move freely along the axis direction of the rotating shaft.

[0012] The driving member includes a lifting motor and a lead screw. The lifting motor is arranged on the shaft seat. The lead screw is directly or indirectly connected to the output end of the lifting motor. A lead screw nut is arranged on the lifting platform. The lead screw nut cooperates with the lead screw for transmission.

[0013] The driving member also includes a coupling, and the output shaft of the lifting motor is connected to the lead screw through the coupling.

[0014] The driving member also includes a guide rail. A guide hole is arranged on the lifting platform. The guide rail is arranged on the shaft seat, and the guide rail slides freely in the corresponding guide hole.

[0015] The axis of the guide rail is parallel to the axis of the rotating shaft.

[0016] The driving member also includes a guide rail upper cover, one end of the guide rail is arranged on the shaft seat, and the other end is arranged on the guide rail upper cover, and the lifting platform moves freely between the shaft seat and the guide rail upper cover.

[0017] The friction force encountered by the rotating platform when it moves along the axis of the rotating shaft is smaller than the air supply resistance encountered by the fan blade structure when it is working.

[0018] A rotation groove is arranged on the circumferential side of the rotating disk, and the end of the fan blade extends into the rotating disk through the rotation groove. In the lifting state, the fan blade can rotate freely along the axis of the rotation groove.

[0019] The rotating disk comprises an upper cover and a lower cover which are buckled with each other. The upper cover and the lower cover are both provided with arc grooves, and two opposite arc grooves jointly form the rotating groove.

[0020] The rotating shaft is provided with a supporting groove, and the end of the fan blade extending into the rotating disk extends into the supporting groove.

[0021] The fan blade structure also includes a motor, and the output shaft of the motor constitutes the rotating shaft or is drivingly connected to the rotating shaft.

[0022] The number of the fan blades is n, and the angle formed by two adjacent fan blades at the axis of the rotating shaft is 360° / n, wherein n≥2.

[0023] An axial flow fan comprises the above-mentioned fan blade structure.

[0024] The fan blade structure and axial flow fan with adjustable fan blade inclination angle provided by the present invention utilize the fan blade structure to adjust the inclination angle of the fan blade, thereby changing the static pressure generated at the fan blade, and finally realizing the adjustment of the air volume to meet the requirements of different working conditions and different units. The linear motion of the lifting mechanism drives the fan blade to adjust the inclination angle through the connecting rod mechanism, and the bearing can isolate the rotation of the rotating platform and the stationary state of the lifting platform, thereby ensuring that the fan blade can be reliably adjusted when performing normal work. At the same time, the lead screw and the lead screw nut cooperate to increase the adjustment accuracy and the control accuracy of the air volume, and realize stepless adjustment of the fan blade inclination angle, realize the controllability and reliability of the adjustment, simplify the adjustment process, and the rotating table can realize simultaneous adjustment of all the fan blades, thereby overcoming the problem in the prior art that the different inclination angles of the fan blades after adjustment affect the air outlet effect of the fan, broadens the air volume control range, improves the versatility of the fan, and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a fan blade structure with adjustable fan blade inclination angle and a fan blade structure of an embodiment of an axial flow fan provided by the present invention;

[0026] Figure 2 A cross-sectional view of a fan blade structure with adjustable fan blade inclination angle and a fan blade structure of an embodiment of an axial flow fan provided by the present invention;

[0027] Figure 3 An exploded view of a fan blade structure with an adjustable fan blade inclination angle and a fan blade structure of an embodiment of an axial flow fan provided by the present invention;

[0028] Figure 4 A cross-sectional view of a rotating disk and a connecting rod mechanism of an embodiment of a fan blade structure with adjustable fan blade inclination angle and an axial flow fan provided by the present invention;

[0029] Figure 5 A diagram showing the matching structure of the fan blade and the rotating disk of the fan blade structure with adjustable fan blade inclination angle and the axial flow fan embodiment provided by the present invention;

[0030] Figure 6 A schematic diagram of the structure of a fan blade structure with adjustable fan blade inclination angle and a driving member of an embodiment of an axial flow fan provided by the present invention;

[0031] In the figure:

[0032] 1. Rotating shaft; 2. Fan blade; 3. Rotating disk; 4. Lifting mechanism; 41. Rotating table; 42. Lifting table; 43. Bearing; 44. Driving member; 5. Connecting rod mechanism; 51. Connecting rod; 52. Cam; 101. Lifting motor; 102. Lead screw; 103. Lead screw nut; 104. Guide rail; 105. Guide rail upper cover; 31. Rotating groove; 32. Upper cover; 33. Lower cover; 6. Motor. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] like Figures 1 to 6 The fan blade structure shown in the figure is arranged on a rotating shaft 1, and the rotating shaft 1 is arranged on a shaft seat. The fan blade structure includes: a rotating disk 3, which is arranged on the rotating shaft 1 and rotates together with the rotating shaft 1; a fan blade 2, and the fan blade 2 is arranged on the rotating disk 3; a lifting mechanism 4, which is arranged on the shaft seat and has a lifting state that can move freely along the axial direction of the rotating shaft 1; a connecting rod mechanism 5, which is arranged between the lifting mechanism 4 and the fan blade 2, and in the lifting state, the connecting rod mechanism 5 adjusts the inclination angle of the fan blade 2. When the fan blade structure works normally, the rotating shaft 1 rotates, and the rotating disk 3 rotates with the rotation of the rotating shaft 1, and at the same time, the connecting rod mechanism 5 adjusts the inclination angle of the fan blade 2. The moving fan blade 2 rotates to achieve the effect of supplying air. At this time, the lifting mechanism 4 and the connecting rod mechanism 5 are in a relatively static state, so as to maintain the inclination angle of the fan blade 2. When the fan blade structure needs to adjust the inclination angle, the lifting mechanism 4 is moved along the axis of the rotating shaft 1, thereby driving the connecting rod mechanism 5 to move at the same time. The connecting rod mechanism 5 converts the linear motion of the lifting mechanism 4 into rotation of the fan blade 2, thereby completing the adjustment of the inclination angle. That is to say, when the lifting mechanism 4 moves in the first direction, the inclination angle becomes larger, and when the lifting mechanism 4 moves in the second direction, the inclination angle becomes smaller. In particular, when the inclination angle is adjusted, the fan structure can perform normal air supply work.

[0035] The inclination angle of the fan blade 2 refers to changing the windward area of ​​the fan blade 2, or in other words, changing the static pressure generated by the fan blade 2, so as to achieve the purpose of changing the final air supply volume of the fan blade structure.

[0036] The connecting rod mechanism 5 includes a connecting rod 51 and a cam 52. The cam 52 is arranged on the fan blade 2. One end of the connecting rod 51 is hinged to the cam 52, and the other end is hinged to the lifting mechanism 4. In the lifting state, the connecting rod 51 drives the cam 52 to rotate. When the connecting rod 51 receives the linear motion of the lifting mechanism 4, it can pull the top of the cam 52, so that the cam 52 rotates along its rotation axis 1, thereby realizing the purpose of converting the linear motion into rotational motion. Because the cam 52 is on the fan blade 2, it can drive the fan blade 2 to rotate to achieve the adjustment of the inclination angle.

[0037] The lifting mechanism 4 includes a rotating table 41, a lifting platform 42 and a bearing 43. The lifting platform 42 is arranged on the shaft seat, the rotating table 41 is arranged on the rotating shaft 1, and the bearing 43 is arranged between the lifting platform 42 and the rotating table 41. In the lifting state, the lifting platform 42 moves along the axial direction of the rotating shaft 1, so that the rotating table 41 is driven by the bearing 43 to move freely along the axial direction of the rotating shaft 1, so as to realize the movement of one end of the pull rod mechanism, so as to use the bearing 43 to separate the rotation of the fan blade 2 or the rotating table 41 from the stillness of the lifting platform 42 or the shaft seat, so as to ensure that the fan blade 2 can perform normal air supply work.

[0038] The lifting mechanism 4 further includes a driving member 44 . The driving member 44 is disposed on the shaft seat, and the driving member 44 drives the lifting platform 42 to move freely along the axis direction of the rotating shaft 1 .

[0039] The driving member 44 includes a lifting motor 101 and a screw 102, wherein the lifting motor 101 is arranged on the shaft seat, and the screw 102 is directly or indirectly connected to the output end of the lifting motor 101, and a screw nut 103 is arranged on the lifting platform 42, and the screw nut 103 cooperates with the screw 102 for transmission, wherein the lifting motor 101 is a stepping motor, and the screw nut 103 and the screw 102 produce relative rotation in a straight line, so that the screw nut 103 moves on the screw 102 along the length direction of the screw 102, thereby realizing the linear movement of the lifting platform 42, when the stepping motor rotates forward, the screw nut 103 moves toward the first end of the screw 102, driving the lifting platform 42 to move in the first direction, and when the stepping motor rotates reversely, the screw nut 103 moves toward the second end of the screw 102, driving the lifting platform 42 to move in the second direction.

[0040] The driving member 44 further includes a coupling, and the output shaft of the lifting motor 101 is connected to the lead screw 102 via the coupling.

[0041] The driving member 44 further includes a guide rail 104 . A guide hole is provided on the lifting platform 42 . The guide rail 104 is provided on the shaft seat, and the guide rail 104 slides freely in the corresponding guide hole, thereby limiting the lifting platform 42 to move only in a set direction.

[0042] The axis of the guide rail 104 is parallel to the axis of the rotating shaft 1 , so that the lifting platform 42 can move along the axis of the rotating shaft 1 .

[0043] The driving member 44 also includes a guide rail cover 105, one end of the guide rail 104 is arranged on the shaft seat, and the other end is arranged on the guide rail cover 105, and the lifting platform 42 moves freely between the shaft seat and the guide rail cover 105, which is convenient for reliable fixation of structures such as the guide rail 104 and the screw 102.

[0044] The friction force encountered by the rotating table 41 when it moves along the axial direction of the rotating shaft 1 is smaller than the air supply resistance encountered by the fan structure when it is working. When the fan structure is placed vertically, the rotating table 41 can be squeezed on only one side of the bearing 43 under the combined action of gravity and air supply resistance, and the bearing 43 can be squeezed on the lifting platform 42. When the lifting platform 42 moves in the direction away from the fan blade 2, the rotating table 41 moves together with the lifting platform 42 under the action of the force.

[0045] A rotating groove 31 is provided on the circumferential side of the rotating disk 3, and the end of the fan blade 2 extends into the rotating disk 3 through the rotating groove 31. In the lifting state, the fan blade 2 can rotate freely along the axis of the rotating groove 31, that is, it can be ensured that the fan blade 2 rotates under the drive of the rotating disk 3, and at the same time, it can be ensured that the fan blade 2 only adjusts the inclination angle during the adjustment of the pull rod mechanism without any changes in other positions.

[0046] The rotating disk 3 includes an upper cover 32 and a lower cover 33 that are interlocked. The upper cover 32 and the lower cover 33 are both provided with arc grooves, and the two opposite arc grooves together form the rotating groove 31, which is convenient for installing the fan blade 2 on the rotating disk 3. In particular, two protrusions are provided on the fan blade 2, and a gap is formed between the two protrusions. The rotating groove 31 is within the gap, thereby ensuring the reliability of the position of the fan blade 2.

[0047] A supporting groove is provided on the rotating shaft 1, and the end of the fan blade 2 extending into the rotating disk 3 extends into the supporting groove, thereby limiting the dimension of the fan blade 2 extending into the rotating disk 3. At the same time, the supporting groove can further drive the fan blade 2 to rotate along with the rotating shaft 1, thereby ensuring the reliability of the installation and operation of the fan blade 2.

[0048] The fan blade structure further includes a motor 6 , and an output shaft of the motor 6 constitutes the rotating shaft 1 or is drivingly connected to the rotating shaft 1 .

[0049] The number of the fan blades 2 is n, and the angle formed by two adjacent fan blades 2 at the axis of the rotating shaft 1 is 360° / n, wherein n≥2, preferably four, and the angle is 90°.

[0050] An axial flow fan comprises the above-mentioned fan blade structure.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A fan blade structure, characterized in that: The fan blade structure is arranged on a rotating shaft (1), wherein the rotating shaft (1) is arranged on a shaft seat, and the fan blade structure comprises: A rotating disk (3) is disposed on the rotating shaft (1) and rotates together with the rotating shaft (1); A fan blade (2), wherein the fan blade (2) is arranged on the rotating disk (3); A lifting mechanism (4) is arranged on the shaft seat and has a lifting state capable of freely moving along the axial direction of the rotating shaft (1); A connecting rod (51) mechanism (5) is arranged between the lifting mechanism (4) and the fan blade (2), and in the lifting state, the connecting rod (51) mechanism (5) adjusts the inclination angle of the fan blade (2); The lifting mechanism (4) comprises a rotating platform (41), a lifting platform (42) and a bearing (43); the lifting platform (42) is arranged on the shaft seat, the rotating platform (41) is arranged on the rotating shaft (1), and the bearing (43) is arranged between the lifting platform (42) and the rotating platform (41); and in the lifting state, the lifting platform (42) drives the rotating platform (41) through the bearing (43) to move freely along the axial direction of the rotating shaft (1); The lifting mechanism (4) further comprises a driving member (44), wherein the driving member (44) is arranged on the shaft seat, and the driving member (44) drives the lifting platform (42) to move freely along the axis direction of the rotating shaft (1); The driving member (44) comprises a lifting motor (101) and a lead screw (102); the lifting motor (101) is arranged on the shaft seat; the lead screw (102) is directly or indirectly connected to the output end of the lifting motor (101); a lead screw nut (103) is arranged on the lifting platform (42); the lead screw nut (103) cooperates with the lead screw (102) for transmission; The driving member (44) further comprises a guide rail (104), a guide hole is provided on the lifting platform (42), the guide rail (104) is arranged on the shaft seat, and the guide rail (104) slides freely in the corresponding guide hole; The axis of the guide rail (104) is parallel to the axis of the rotating shaft (1).

2. The fan blade structure according to claim 1, characterized in that: The connecting rod (51) mechanism (5) comprises a connecting rod (51) and a cam (52), wherein the cam (52) is arranged on the fan blade (2), one end of the connecting rod (51) is hinged to the cam (52), and the other end is hinged to the lifting mechanism (4), and in the lifting state, the connecting rod (51) drives the cam (52) to rotate.

3. The fan blade structure according to claim 1, characterized in that: The driving member (44) further comprises a coupling, and the output shaft of the lifting motor (101) is connected to the lead screw (102) via the coupling.

4. The fan blade structure according to claim 1, characterized in that: The driving member (44) further comprises a guide rail upper cover (105), one end of the guide rail (104) is arranged on the shaft seat, and the other end is arranged on the guide rail upper cover (105), and the lifting platform (42) is free to move between the shaft seat and the guide rail upper cover (105).

5. The fan blade structure according to claim 1, characterized in that: The friction force experienced by the rotating platform (41) when moving along the axis direction of the rotating shaft (1) is smaller than the air supply resistance experienced by the fan blade structure when it is working.

6. The fan blade structure according to claim 1, characterized in that: A rotating groove (31) is provided on the circumferential side of the rotating disk (3), and the end of the fan blade (2) extends into the rotating disk (3) through the rotating groove (31), and in the lifting state, the fan blade (2) can rotate freely along the axis of the rotating groove (31).

7. The fan blade structure according to claim 6, characterized in that: The rotating disk (3) comprises an upper cover (32) and a lower cover (33) which are interlocked, and both the upper cover (32) and the lower cover (33) are provided with arc grooves, and the two opposing arc grooves together form the rotating groove (31).

8. The fan blade structure according to claim 6, characterized in that: The rotating shaft (1) is provided with a supporting groove, and the end of the fan blade (2) extending into the rotating disk (3) extends into the supporting groove.

9. The fan blade structure according to claim 1, characterized in that: The fan blade structure further comprises a motor (6), wherein an output shaft of the motor (6) constitutes the rotating shaft (1) or is in driving connection with the rotating shaft (1).

10. The fan blade structure according to claim 1, characterized in that: The number of the fan blades (2) is n, and the angle formed by two adjacent fan blades (2) at the axis of the rotating shaft (1) is 360° / n, where n≥2.

11. An axial flow fan, characterized in that: The invention comprises the wind blade structure according to any one of claims 1 to 10.

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