A blade structure for improving fan blade performance and a vehicle fan thereof

Abstract

A blade structure for improving the performance of a fan blade and a vehicle fan thereof, wherein the blade structure comprises a blade mounted on the fan blade, at least one wingtip sail is mounted on the open end of each blade, the wingtip sail is located at the end face of the blade and is provided with a wingtip sail protruding from the end face of the blade, and the wingtip sails on each blade are not connected to each other. The vehicle fan comprises a housing, two buckle inclined plates with gradually decreasing spacing from top to bottom are provided on the housing, a buckle cone groove is formed between the two buckle inclined plates, the bottom of the buckle cone groove is a stop protrusion, the buckle cone groove is assembled with the conical plate, a conical buckle protrusion is provided on the conical plate, the inner side of the conical buckle protrusion is tightly attached to the end face of the stop protrusion to realize the buckle assembly of the conical plate and the buckle cone groove, and the conical plate is elastic; the conical plate is mounted on a shield, a plurality of through slots are provided on the shield, a fan blade is mounted inside the shield, the fan blade is mounted on the motor shaft of the motor, the motor is mounted on the housing, and a plurality of blades are mounted on the fan blade.

Description

Technical Field

[0001] The invention relates to a vehicle fan, and in particular to a blade structure for improving fan blade performance and a vehicle fan thereof. Background Art

[0002] With the deepening of automobile electrification and intelligence, many electronic components are installed in the whole vehicle. Among them, some control chips or communication chips require a small fan for active air cooling due to their huge computing power and closed installation environment, so that the chip can work in a suitable temperature environment.

[0003] These small fans are used to match the chips of the entire vehicle and are often installed in the passenger compartment. They are the component systems closest to the passengers. In addition, for electrified vehicles, in order to increase the cruising range of such vehicles with equal battery capacity, the current consumption of all electronic components has become very sensitive. In other words, the efficiency requirements for small fans have also been increased.

[0004] Defects and shortcomings of the existing technology:

[0005] Traditional products use ringless fans or ring fans as fluid components, and use motors to drive the fan blades to rotate to drive air flow.

[0006] The rimless fan (the wingtip sail is removed in the attached figure of this case) can run at a very high speed driven by a motor. At the same time, due to the structure of the rimless fan itself, the overall imbalance of the blades of this type is low, so the vibration generated during the rotation process is also low. However, since it is a rimless fan, when the air passes through the side of the blade, vortices will be generated due to the different air pressures on both sides of the blade. The vortices at the wingtips increase the resistance of the fan movement and reduce the operating efficiency of the fan.

[0007] The fan with a ring effectively reduces the wing tip vortex on the side of the fan blade and improves the working efficiency of the fan blade. However, in actual applications, the fan with a ring will produce a circle of material weld lines on the outer ring due to material flow during the manufacturing process (an outer ring is fixed on the outside of the fan blade, and the outer ring is composed of a rectangular strip, and its joints are connected by weld lines). This circle of weld lines is often the place where the structural strength of the parts is relatively weak. Due to the limitation of the weld line, the fan blade has a limited speed without replacing more advanced materials, and it cannot achieve more extensive applications. Summary of the invention

[0008] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a blade structure and a vehicle fan thereof for improving the performance of fan blades, wherein the blade structure can effectively reduce vortex and resistance by adding a wingtip sail.

[0009] To achieve the above-mentioned purpose, the present invention provides a blade structure for improving the performance of fan blades, including blades installed on the fan blades, each blade having at least one wingtip sail installed on the open end, the wingtip sail being located at the end surface of the blade and protruding from the end surface of the blade, and the wingtip sails on each blade are not connected to each other.

[0010] As a further improvement of the present invention, in the direction of the axial orthographic projection of the fan blade, the wing tip sail is in an arc shape, and the contour diameter of the outermost arc is the diameter at the tip of the fan blade.

[0011] As a further improvement of the present invention, the height of the wing tip sail does not exceed 1 / 4 of the length of the blade radius.

[0012] As a further improvement of the present invention, the thickness of the wingtip sail is between 0.5 mm and 3 mm.

[0013] As a further improvement of the present invention, the angle α formed by the inner surface of the wingtip sail and its axial direction is in the range of 0.5 degrees to 3 degrees.

[0014] As a further improvement of the present invention, the wingtip sail is arranged as a whole on the upper part of the blade or along the tip of the blade, occupying half of the upper and lower parts. When the height of the upper half of the wingtip sail is lower than 1 / 10 of the blade radius, it is necessary to adjust the height of the wingtip sail to not exceed 1 / 4 of the blade radius length to ensure the height of the wingtip sail in the upper half of the blade.

[0015] As a further improvement of the present invention, the wing tip sail is injection molded together with the blade and the fan blade to form an integrated structure.

[0016] The invention also discloses a vehicle fan, which is applied with the blade structure.

[0017] As a further improvement of the present invention, it also includes a shell, the shell is provided with two buckle inclined plates with a gradually decreasing spacing from top to bottom, a buckle cone groove is formed between the two buckle inclined plates, the bottom of the buckle cone groove is a stop protrusion, the buckle cone groove is assembled with the conical plate, the conical plate is provided with a conical buckle protrusion, the inner side of the conical buckle protrusion is tightly attached to the end face of the stop protrusion to achieve the buckle assembly of the conical plate and the buckle cone groove, and the conical plate is elastic;

[0018] The conical plate is installed on the shield, and a plurality of through slots are arranged on the shield. The fan blades are installed inside, and the fan blades are installed on the motor shaft of the motor, and the motor is installed on the shell. A plurality of blades are evenly installed on the fan blades along the circumferential direction thereof.

[0019] As a further improvement of the present invention, a mounting snap ring is provided on the outer shell, one end of the mounting snap ring is open and the inner side is a mounting inner ring, and an arc-shaped protrusion is provided on the side wall of the mounting inner ring, and the arc-shaped protrusion is clamped into the mounting seat ring groove of the mounting seat, so that the mounting seat is installed on the mounting snap ring; the mounting snap ring is elastic, so that the arc-shaped protrusion is clamped in the mounting seat ring groove through the elastic force of elastic deformation.

[0020] The beneficial effects of the present invention are:

[0021] The wingtip sail of the present invention can effectively reduce the vortex at the wingtip of the fan blade, thereby reducing the running resistance caused by the vortex and the vibration caused by the vortex, making the overall wind noise performance of the product better. Under the same blade design, the performance curves (simulation results) of the fan without winglets and with winglets are as follows Fig.12 Under similar fluid performance, the current consumed by the fan with winglets is nearly 7% lower than that of the fan without winglets. It can be seen that the fan blades with winglet design improve the operating efficiency of the fan itself.

[0022] At the same time, because the wing tips are not connected, there is no outer ring weld line like a coiled fan, so the fan blades can still be used at high speeds without replacing more solid materials, making lightweight fan blades possible. At the same time, lightweight fan blades also reduce the load on the motor, extending the life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1-Figure 5 It is a schematic diagram of the structure of the present invention. Figure 4 , Figure 5 They are Figure 3 AA and BB section views.

[0024] Figure 6-Figure 7 It is a schematic diagram of the structure of the present invention after the protective cover is removed.

[0025] Figure 8 It is a schematic diagram of the structure of the shield.

[0026] Figure 9-10 It is a schematic diagram of the structure of the fan blade.

[0027] Fig.11 It is a schematic diagram of the improved structure at the wedge-shaped block.

[0028] Fig.12 This is the fan performance curve simulation result diagram. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] See also Figure 1-Figure 10 The vehicle fan of this embodiment includes a housing 110, on which a mounting snap ring 120 is provided. The mounting snap ring 120 has an opening at one end and a mounting inner ring 121 on the inner side. An arc-shaped protrusion 122 is provided on the side wall of the mounting inner ring 121. The arc-shaped protrusion 122 is inserted into the mounting seat ring groove 131 of the mounting seat 130, so that the mounting seat 130 is installed on the mounting snap ring 120; the mounting snap ring 120 is elastic, so that the arc-shaped protrusion 122 is clamped in the mounting seat ring groove 131 through the elastic force of elastic deformation. When the fan needs to be installed, the bolt passes through the mounting seat 130 and is assembled with an external device.

[0032] The housing 110 is also provided with two snap-on inclined plates 140 with a gradually decreasing spacing from top to bottom, a snap-on conical groove 141 is formed between the two snap-on inclined plates 140, the bottom of the snap-on conical groove 141 is a stop protrusion 142, the snap-on conical groove 141 is snap-fitted with the conical plate 220, the conical plate 220 is provided with a conical snap-on protrusion 221, the inner side of the conical snap-on protrusion 221 is tightly attached to the end face of the stop protrusion 142, thereby realizing the snap-on assembly of the conical plate 220 and the snap-on conical groove 141, and the conical plate 220 is elastic.

[0033] The conical plate 220 is mounted on the shield 210, and the shield 210 is provided with a plurality of through slots to facilitate airflow. The housing 110 is provided with a fan blade 300, which is mounted on the motor shaft of the motor, and the motor is mounted on the housing 100. After the motor is started, the fan blade 300 can be driven to rotate in a circle, and the fan blade 300 can generate airflow when rotating in a circle, and the airflow passes through the through slots of the shield 210. The motor and the fan blade 300, how the motor is mounted on the housing 110, input the existing technology, and reference can be made to the existing similar fan structure.

[0034] A plurality of blades 310 are evenly mounted on the fan blade 300 along its circumferential direction, and at least one wingtip sail 320 is mounted on the open end of each blade 310. The wingtip sail 320 is located at both end surfaces of the blade 310 and is respectively provided with wingtips 321 protruding from the blade 310, and the wingtip sails 320 on each blade are not connected to each other. In this embodiment, the geometric shape design of the blade surface of the fan is consistent with the design without wingtips, including the geometric shape of the blades, the number of blades, the distribution of the blades, etc., and the difference lies in the addition of wingtips.

[0035] Preferably, in this embodiment, the geometric dimensions and design requirements of the wingtip sail are:

[0036] The geometric shape of the wing tip sail is an arc shape when viewed from the blade axis, and the outermost circle diameter is the diameter at the tip of the original blade;

[0037] The height of the wingtip sail shall not exceed 1 / 4 of the blade radius, and may be arranged as a whole on the upper part of the blade or along the tip of the blade, each occupying half of the upper and lower portions. Note that in this distribution state, when the height of the upper part of the wingtip sail is lower than 1 / 10 of the blade radius, the height of the wingtip sail shall be adjusted to ensure that the height of the wingtip sail is in the upper part of the blade; in this embodiment, the upper and lower portions are based on the Figure 4 The upper and lower limits shall prevail.

[0038] The thickness of the wingtip sail must be between 0.5mm and 3mm;

[0039] The angle α formed between the inner surface of the wingtip sail and its axial direction is between 0.5 and 3 degrees. This design is easy to manufacture and can also ensure a certain driving force for the air flow.

[0040] The wingtip sail can be injection molded together with the fan blade and requires no additional machining or post-processing.

[0041] See also Fig.11 In order to prevent the shield 220 and the housing 110 from being separated due to the inner side of the conical buckle protrusion 221 being separated from the stop protrusion 142 during use, that is, the shield falling off and loosening, the applicant has also made the following improvements:

[0042] A locking groove 222 is provided on the conical plate 220, and a slant plate slide groove 143 is provided on one of the buckle slant plates 140. The slant plate slide groove 143 is engaged with one end of the locking rod 410 and can be slidably assembled. One end of the locking rod 410 is inserted into the locking groove 222, and the other end passes through the buckle slant plate 140 and is assembled with the pull ring 420. The portion of the locking rod 410 between the pull ring 420 and the buckle slant plate 140 is assembled with one end of the spring sheet 430, and the other end of the spring sheet 430 is assembled with the buckle slant plate 140 or the housing. The spring sheet 430 is elastic and is used to apply an elastic force to the locking rod 410 to push the locking groove to prevent the conical plate 220 from being separated from the buckle conical groove 141. When the conical plate 220 needs to be taken out, the locking rod 420 only needs to be pulled out of the locking groove through the pull ring. In this embodiment, the spring sheet is flexible, so when the locking rod is pulled out, the spring sheet will deform to reduce the corresponding displacement.

[0043] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0044] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A vehicle fan, characterized in that: It comprises blades mounted on the fan blades, each blade having at least one wingtip sail mounted on its open end, the wingtip sail being located at the end surface of the blade and protruding from the end surface of the blade, and the wingtip sails on each blade are not connected to each other; It also includes a shell, on which are disposed two buckle inclined plates with a gradually decreasing spacing from top to bottom, a buckle conical groove is formed between the two buckle inclined plates, the bottom of the buckle conical groove is a stop protrusion, the buckle conical groove is assembled with the conical plate, a conical buckle protrusion is disposed on the conical plate, the inner side of the conical buckle protrusion is tightly attached to the end surface of the stop protrusion to achieve buckle assembly of the conical plate and the buckle conical groove, and the conical plate is elastic; The conical plate is mounted on the shield, and a plurality of through slots are arranged on the shield. A fan blade is mounted in the housing, and the fan blade is mounted on the motor shaft of the motor, and the motor is mounted on the housing. A plurality of blades are evenly mounted on the fan blade along the circumferential direction thereof. A locking groove is arranged on the conical plate, and an inclined plate slide groove is arranged on one of the buckle inclined plates. The inclined plate slide groove is engaged with one end of the locking rod and can be slidably assembled. One end of the locking rod is inserted into the locking groove, and the other end is assembled with the pull ring after passing through the buckle inclined plate. The part of the locking rod located between the pull ring and the buckle inclined plate is assembled with one end of the spring sheet, and the other end of the spring sheet is assembled with the buckle inclined plate or the outer shell. The spring sheet is elastic, and the spring sheet is used to apply an elastic force to the locking rod to push the locking groove to prevent the conical plate from detaching from the buckle conical groove. When the conical plate needs to be removed, it is only necessary to pull the locking rod out of the lock groove through the pull ring. The spring sheet is flexible.

2. The vehicle fan according to claim 1, characterized in that: In the direction of the axial projection of the fan blade, the wingtip sail is in the shape of an arc, and the contour diameter of the outermost arc is the diameter at the tip of the fan blade.

3. The vehicle fan according to claim 1, characterized in that: The height of the wingtip sail shall not exceed 1 / 4 of the length of the blade radius.

4. The vehicle fan according to claim 1, characterized in that: The thickness of the wingtip sail is between 0.5mm and 3mm.

5. The vehicle fan according to claim 1, characterized in that: The angle α formed by the inner surface of the wingtip sail and its axial direction is between 0.5 degrees and 3 degrees.

6. The vehicle fan according to any one of claims 1 to 5, characterized in that: The wingtip sail is arranged as a whole on the upper part of the blade or along the tip of the blade, occupying half of the upper and lower parts. When the height of the upper part of the wingtip sail is lower than 1 / 10 of the blade radius, the height of the wingtip sail needs to be adjusted to not exceed 1 / 4 of the blade radius length to ensure the height of the wingtip sail in the upper part of the blade.

7. The vehicle fan according to claim 6, characterized in that: The wingtip sail is injection molded together with the blades and fan blades to make it an integrated structure.

8. The vehicle fan according to claim 1, characterized in that: A mounting snap ring is provided on the outer shell, one end of the mounting snap ring is open and the inner side is a mounting inner ring, and an arc-shaped protrusion is provided on the side wall of the mounting inner ring, and the arc-shaped protrusion is clamped into the mounting seat ring groove of the mounting seat, so that the mounting seat is installed on the mounting snap ring; the mounting snap ring is elastic, so that the arc-shaped protrusion is clamped in the mounting seat ring groove through the elastic force of elastic deformation.

Images