Cleaning fan and harvester

Abstract

The invention provides a cleaning fan and a harvester, the cleaning fan comprises a turbine fan set, the turbine fan set comprises a plurality of turbine fan bodies and a mounting assembly, the mounting assembly comprises a connecting support and a fan shaft, the multiple turbine fan bodies are arranged on the fan shaft in a sleeving mode, and the connecting support is connected with the turbine fan bodies. And each turbofan body is detachably connected with the connecting bracket. According to the cleaning fan, through the modular design, the appropriate number of turbofan bodies can be selected according to the use requirement and the installation space when the cleaning fan is used, the multiple turbofan bodies are detachably installed on the connecting support, and therefore the overall structure adaptability and universality of the cleaning fan are high; free matching of the turbofan body can be achieved, the defects in an existing design are overcome fundamentally, and the use requirements of larger air output, higher air speed and more uniform wind field distribution can be met.

Description

Technical Field

[0001] The present application relates to the technical field of harvesters, and in particular to a cleaning blower and a harvester. Background Art

[0002] In recent years, as the demand for combine harvester operating efficiency has become increasingly higher, higher requirements have been placed on the cleaning system of combine harvesters. As one of the important components of the cleaning system, the cleaning fan needs to improve its performance to handle more materials. Due to structural and space limitations, the mainstream small and medium-sized feeding harvester models in China need to achieve greater air volume, stronger wind speed and more uniform wind field distribution in a smaller space.

[0003] In the existing solutions, in order to meet the above needs, several design methods are usually adopted. First, the diameter of the impeller and the volute is increased. Although such a design makes the air output large, the volume of the cleaning fan also increases, resulting in a large space occupation and is not suitable for models with small and medium feed volumes. Increasing the diameter will make the air intake on both sides very large, the low-pressure area is large, and it is very easy to inhale straw, etc., and adding a protective net will have a greater impact on the air intake, making the air output uneven. At the same time, the part with increased diameter will also lead to poor adaptability in width; second, adding openings at the tongue. Although such a design has a simple structure, the increase in air output is limited; third, the design of a multi-duct turbine fan is adopted. Although the air output increases, it has a complex structure, high cost and large volume, resulting in a large space occupation, the cleaning chamber needs to increase pre-cleaning, and maintenance is difficult. At the same time, due to its structural limitations, it is difficult to control the air output and wind speed distribution of each duct, the uniformity is poor, and the upper duct is prone to flat blowing, resulting in grain loss.

[0004] In view of the above situation, it is necessary to design a new cleaning fan to solve the above problems. Summary of the invention

[0005] In view of this, in order to overcome the defects of the prior art, the present invention provides a cleaning fan and a harvester, which effectively solves the problem that the existing cleaning fans are limited by structural design and installation space, resulting in the inability to meet larger air output, stronger wind speed and more uniform wind field distribution.

[0006] According to a first aspect of the present invention, a cleaning fan is provided, wherein the cleaning fan comprises a turbine blower group, the turbine blower group comprises a plurality of turbine blower bodies and a mounting assembly, the mounting assembly comprises a connecting bracket and a blower shaft, a plurality of the turbine blower bodies are sleeved on the blower shaft, and each of the turbine blower bodies is detachably connected to the connecting bracket.

[0007] Preferably, the turbine blower body comprises a volute and an impeller, and the impeller is detachably mounted on the volute.

[0008] Preferably, the volute includes an air inlet and an outer shell, the outer shell surrounds the air inlet, and a first disassembly plate and a second disassembly plate are provided on the side of the air inlet, and the first disassembly plate and the second disassembly plate are detachably mounted on the air inlet.

[0009] Preferably, the impeller comprises a spoke plate and a plurality of blades arranged on both sides of the spoke plate.

[0010] Preferably, a socket connector is further provided in the middle of the impeller, and the impeller is connected to the fan shaft via the socket connector; a plurality of the fan blades surround the socket connector; and / or the fan blades are formed into an S-shaped structure.

[0011] Preferably, the first end of the fan blade is close to the socket, and the second end of the fan blade is close to the edge of the spoke plate; the angle between the tangent of the second end of the fan blade and the tangent of the edge of the spoke plate is 35°-50°.

[0012] Preferably, the cleaning fan also includes an air outlet group, the air outlet group includes a plurality of air outlet portions, the plurality of air outlet portions are arranged one-to-one correspondingly to the plurality of turbine blower bodies, and the air outlet portions are detachably connected to the turbine blower bodies; each of the air outlet portions includes an air guide plate, and the air guide plate is arranged on the air outlet portion in an adjustable position.

[0013] Preferably, a flow gap is provided between two adjacent turbine blower bodies.

[0014] Preferably, the mounting assembly further comprises a mounting seat, which is disposed at an end of the turbine fan unit and is detachably connected to the first disassembly plate and / or the second disassembly plate.

[0015] According to a second aspect of the present invention, a harvester is provided, wherein the harvester comprises the cleaning blower as described above.

[0016] The cleaning fan according to the present invention has a simple overall structure and is easy to assemble. Through the modular design, the maintainability and versatility of the whole machine are improved, and the air volume, air speed and air uniformity are correspondingly improved. When using the cleaning fan, a suitable number of turbine blower bodies can be selected according to the use requirements and installation space. Multiple turbine blower bodies can be detachably installed on the connecting bracket, so that the overall structure of the cleaning fan has high adaptability and versatility, and the turbine blower bodies can be freely matched, thereby fundamentally solving the defects in the existing design and meeting the use requirements of larger air volume, stronger wind speed and more uniform wind field distribution; at the same time, the modular design allows the cleaning fan to have multiple air inlet positions, changing the original structure that only takes in air from both ends. The adjacent turbine blower bodies also serve as important air inlet points, sharing the burden of air inlet on both sides and reducing the low-pressure area of ​​air inlet on both sides. The cleaning fan has multiple detachable designs such as between the turbine fan body and the connecting bracket, between the volute and the impeller, and between the turbine fan body and the air outlet, so that the cleaning fan can be used in different scenarios, improving versatility and maintainability. The impeller of the cleaning fan adopts an integrated structure supported by a single spoke plate in the middle, which can support the fan blades without affecting the airflow entering from both ends of the volute, ensuring efficient air outlet; at the same time, due to the design of the first disassembly plate and the second disassembly plate, the impeller and the fan shaft can be removed from the side during maintenance, which is convenient for inspection and maintenance; in addition, due to the modular design, the entire set of cleaning fans can be assembled before installation, and the whole can be installed together in the whole machine, and through the support connection of the first mounting seat and the second mounting seat, it can be sealed with a sponge, which is convenient for assembly and maintenance.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of a cleaning fan according to an embodiment of the present invention is shown;

[0020] Figure 2 A schematic structural diagram showing another perspective of a cleaning fan according to an embodiment of the present invention;

[0021] Figure 3 A schematic structural diagram of a turbine blower body according to an embodiment of the present invention is shown;

[0022] Figure 4 A schematic structural diagram of an impeller according to an embodiment of the present invention is shown;

[0023] Figure 5 A front view showing an impeller according to an embodiment of the present invention;

[0024] Figure 6 A cross-sectional view showing a turbine blower body according to an embodiment of the present invention.

[0025] Figure markings: 1-turbine fan body; 101-volute; 102-impeller; 103-air inlet; 104-casing; 105-first disassembly plate; 106-second disassembly plate; 107-spoke plate; 108-blades; 109-sleeve; 110-air outlet; 2-connecting bracket; 3-fan shaft; 4-air outlet; 401-air guide plate; 5-flow gap; 6-first mounting seat; 7-second mounting seat; 8-adjusting seat; 9-sealing rubber plate; 10-pulley; H1-first distance; H2-second distance; A1-first angle; A2-second angle. DETAILED DESCRIPTION

[0026] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] According to a first aspect of the present invention, there is provided a cleaning fan, such as Figures 1 to 6 As shown, the cleaning fan is used for a harvester, and the cleaning fan includes a turbine fan unit.

[0031] In the following description, reference will be made to Figures 1 to 6 The detailed structure of the turbine blower unit of the cleaning blower is described in detail.

[0032] like Figure 1 and Figure 2 As shown, in the embodiment, the cleaning fan adopts a modular design as a whole, so that each part can be disassembled, which is convenient for the versatility of matching different width models in the later stage, and realizes the free matching of multiple sets of turbine fan bodies 1, so as to solve the problem that the cleaning fan is limited by the structural design and installation space, resulting in the inability to meet the requirements of larger air output, stronger wind speed and more uniform wind field distribution.

[0033] Specifically, the turbine fan group may include a plurality of turbine fan bodies 1 and a mounting assembly, wherein the plurality of turbine fan bodies 1 are connected to each other through the mounting assembly, and the plurality of turbine fan bodies 1 are also mounted on the harvester through the mounting assembly. The mounting assembly may include a connecting bracket 2 and a fan shaft 3, wherein the plurality of turbine fan bodies 1 are sleeved on the fan shaft 3, and each turbine fan body 1 is detachably connected to the connecting bracket 2. When connected, the fan shaft 3 may connect the plurality of turbine fan bodies 1 in series, and when the fan shaft 3 rotates, the plurality of turbine fan bodies 1 may be driven to rotate at the same time. The plurality of turbine fan bodies 1 are detachably connected to the connecting bracket 2, and the detachable connection method may be, for example, bolt connection. In this way, the user may select the appropriate number of turbine fan bodies 1 according to the demand for air volume and the size of the installation space, for example, in the embodiment, four turbine fan bodies 1 are selected, and the four turbine fan bodies 1 are connected to the connecting bracket 2 by bolts to ensure the connection stability.

[0034] The cleaning fan adopts a modular design, so that when using the cleaning fan, a suitable number of turbine fan bodies 1 can be selected according to the use requirements and installation space. Multiple turbine fan bodies 1 can be detachably installed on the connecting bracket 2, so that the overall structure of the cleaning fan has high adaptability and versatility, and the turbine fan bodies 1 can be freely matched, thereby fundamentally solving the defects in the existing design and meeting the use requirements of larger air output, stronger wind speed and more uniform wind field distribution.

[0035] Preferably, if Figures 1 to 3 and Figure 6 As shown, in an embodiment, the turbine blower body 1 may include a volute 101 and an impeller 102, and the impeller 102 is detachably mounted on the volute 101. The detachable volute 101 and impeller 102 can facilitate the disassembly and repair of the impeller 102 of the turbine blower body 1, and facilitate later maintenance.

[0036] Preferably, if Figures 1 to 3 and Figure 6 As shown, in an embodiment, the volute 101 may include an air inlet 103 and an outer shell 104, the outer shell 104 surrounds the air inlet 103, and in an embodiment, the volute 101 is formed in a spiral shape. The end of the outer shell 104 is an air outlet 110, and the air outlet 110 can be connected to the air outlet 4 described below.

[0037] Further, a first disassembly plate 105 and a second disassembly plate 106 are provided on the side of the air inlet 103, and the first disassembly plate 105 and the second disassembly plate 106 are detachably mounted on the air inlet 103. The detachable connection method can be, for example, to open a connection hole and use a fastening bolt. The interior of the volute 101 is provided with an accommodation space, which can be used to accommodate the impeller 102. When the impeller 102 needs to be installed, the first disassembly plate 105 and the second disassembly plate 106 are removed from the housing 104, and then the impeller 102 is placed in the accommodation space, and the impeller 102 is sleeved on the fan shaft 3, and finally the first disassembly plate 105 and the second disassembly plate 106 are installed on the housing 104. Through the provision of the first disassembly plate 105 and the second disassembly plate 106, the user can disassemble the impeller 102 from the side of the volute 101, which is convenient for inspection and maintenance.

[0038] Further, see Figure 6 In order to enable the volute 101 to obtain a larger air volume under the condition of the same size, the diameter of the air inlet 103 of the volute 101 is 280-350mm (the air inlet 103 of the volute 101 is Figure 6 The circular shaded area where the impeller 102 is located), the extended size of the outer shell 104 of the spiral volute 101 is 120-160mm, and the extended size of the outer shell 104 of the spiral volute 101 is Figure 6The first distance H1 in the volute 101 is 180-220 mm in size at the end where the volute 101 is connected to the air outlet 4. The size of the end where the volute 101 is connected to the air outlet 4 (the height of the air outlet) is Figure 6 The second distance H2 in the figure can also be the size of the air outlet 110. The structural design of the volute 101 of this size is smaller in size and has a larger air output than the existing fans. And the second distance H2 is closer to the first distance H1, which can further improve the wind speed and uniformity of the air outlet 110. The first angle A1 is 45-55°, that is, the volute tongue angle (the angle between the connecting line between the tongue and the fan axis relative to the vertical line between the fan axis and the lower plane of the air outlet) is 45-55°.

[0039] Preferably, if Figures 1 to 3 As shown, in the embodiment, the first disassembly plate 105 and the second disassembly plate 106 are combined to form an annular structure, the outer diameter of the annular structure is larger than the diameter of the impeller 102, and the inner diameter of the annular structure is smaller than the diameter of the impeller 102. In this way, the first disassembly plate 105 and the second disassembly plate 106 can make the impeller 102 stable to install and easy to disassemble.

[0040] Preferably, if Figure 4 and Figure 5 As shown, in the embodiment, the impeller 102 includes a spoke 107 and a plurality of blades 108 disposed on both sides of the spoke 107. Specifically, the impeller 102 includes only one spoke 107 and the spoke 107 is disposed in the middle of the impeller 102. The single spoke structure can make the impeller 102 have sufficient support force without affecting the airflow entering from both sides of the volute 101. At the same time, the impeller 102 is an integrated structure, that is, the plurality of blades 108 and the spoke 107 form an integrated structure, which can further increase the strength of the entire structure and improve the airflow entry efficiency and air outlet efficiency.

[0041] Preferably, if Figure 4 and Figure 5 As shown, in the embodiment, a socket 109 is further provided in the middle of the impeller 102, and the impeller 102 is connected to the fan shaft 3 via the socket 109. The socket 109 can be, for example, a clamp, and each impeller 102 is fixedly connected to the fan shaft 3 via the clamp.

[0042] Furthermore, the plurality of blades 108 surround the sleeve 109 , and the plurality of blades 108 surround the sleeve 109 evenly and at intervals, so that the wind is more uniform.

[0043] Preferably, in the embodiment, the fan blades 108 may be made of polypropylene. The fan blades 108 made of polypropylene have the properties of being resistant to aging, high and low temperatures, and impact.

[0044] Preferably, if Figure 4 and Figure 5 As shown, in an embodiment, the first end of the fan blade 108 is close to the socket 109, and the second end of the fan blade 108 is close to the edge of the spoke 107. In an embodiment, the fan blade 108 may have a plurality of bending portions, and the plurality of bending portions make the fan blade 108 form an approximately S-shaped structure. The S-shaped structure can guide the airflow, reduce the intake loss and allow the gas to be quickly discharged.

[0045] Furthermore, the angle between the tangent of the second end of the blade 108 and the tangent of the edge of the spoke 107 is 35°-50° (i.e., the complementary angle of the backward tilt angle of the blade 108), i.e. Figure 5 The second angle A2 is 35°-50°. The outer edge inclination angle of the fan blade 108 is 35°-50°, which can ensure efficient air outlet.

[0046] Preferably, if Figures 1 to 3 As shown, in the embodiment, the cleaning fan also includes an air outlet group, and the air outlet group includes a plurality of air outlets 4, and the plurality of air outlets 4 are arranged one by one with the plurality of turbine fan bodies 1, and the air outlets 4 are detachably connected to the turbine fan body 1, and the detachable connection method can be, for example, opening a connection hole and using a fastening bolt. During assembly, a reasonable assembly sequence can be selected as needed, for example, first assembling the plurality of turbine fan bodies 1 with the connecting bracket 2, and then assembling with the plurality of air outlets 4, or first installing the air outlet 4 on the turbine fan body 1, and then connecting the turbine fan body 1 with the air outlet 4 in series. In addition, since the air outlet 4 is detachably connected to the turbine fan body 1, the user can select the air outlet 4 of suitable size and specification as needed, so as to further improve the versatility and adaptability of the fan.

[0047] Furthermore, each air outlet portion 4 includes an air guide plate 401, and the air guide plate 401 is arranged on the air outlet portion 4 in an adjustable position. Figure 1 An adjustment seat 8 is provided at the side end of the air outlet portion 4. The adjustment seat 8 can connect multiple air guide plates 401 in series through a connecting shaft. The position of the adjustment seat 8 is changed to rotate the connecting shaft, and the multiple air guide plates 401 are driven to change their positions through the connecting shaft, thereby making the air outlet direction of the air outlet portion 4 adjustable.

[0048] Preferably, if Figure 1 and Figure 2As shown, in the embodiment, a flow gap 5 is provided between two adjacent turbine fan bodies 1. Since the cleaning fan adopts a modular design of multiple turbine fan bodies 1 in series, in actual use, wind not only enters from both ends of the series, but also an air inlet, i.e., a flow gap 5, is provided between two adjacent turbine fan bodies 1. The flow gap 5 shares the burden of air intake on both sides, reduces the low-pressure area of ​​air intake on both sides, and can improve air intake efficiency while having little impact on air volume and wind direction when used with a protective net.

[0049] Preferably, if Figure 1 and Figure 2 As shown, in an embodiment, the mounting assembly may further include a mounting seat, which is disposed at the end of the turbine fan unit, and the mounting seat is detachably connected to the first disassembly plate 105 and / or the second disassembly plate 106. Specifically, the mounting seat may include a first mounting seat 6 and a second mounting seat 7, wherein the first mounting seat 6 is detachably connected to the first disassembly plate 105 and / or the second disassembly plate 106, and the detachable connection method is, for example, to open a connection hole and use a fastening bolt. The turbine fan unit can be installed on the harvester through the first mounting seat 6.

[0050] Furthermore, the second mounting seat 7 is disposed at the end of the air outlet group and is detachably connected to the air outlet group, and the detachable connection method is, for example, to open a connection hole and use a fastening bolt. The air outlet group can be installed on the harvester through the second mounting seat 7. The structures of the first mounting seat 6 and the second mounting seat 7 are not limited and can be selected according to the installation position of the harvester.

[0051] Preferably, if Figure 1 and Figure 2 As shown, in the embodiment, a sealing rubber plate 9 is further provided at the upper end of the fan unit, and the fan unit achieves sealing and gas flow direction control through the sealing rubber plate 9.

[0052] Preferably, if Figure 2 As shown, in the embodiment, the fan shaft 3 is driven by the pulley 10 to achieve rotation. The pulley 10 can be driven by an external power source through a belt to achieve rotation, thereby driving the fan shaft 3 to rotate.

[0053] The overall structure of the cleaning fan is simple and easy to assemble. Through the modular design, the maintainability and versatility of the whole machine are improved, and the air volume, air speed and air uniformity are correspondingly improved. When using the cleaning fan, the appropriate number of turbine fan bodies 1 can be selected according to the use requirements and installation space. Multiple turbine fan bodies 1 can be detachably installed on the connecting bracket 2, so that the overall structure of the cleaning fan has high adaptability and versatility, and the turbine fan body 1 can be freely matched, thereby fundamentally solving the defects in the existing design and meeting the use requirements of larger air volume, stronger wind speed and more uniform wind field distribution; at the same time, the modular design allows the cleaning fan to have multiple air inlet positions, changing the original structure that only takes in air from both ends. The adjacent turbine fan bodies 1 also serve as important air inlet points, sharing the burden of air inlet on both sides and reducing the low-pressure area of ​​air inlet on both sides. The cleaning fan has a disassembled design between the turbine fan body 1 and the connecting bracket 2, between the volute 101 and the impeller 102, and between the turbine fan body 1 and the air outlet 4, so that the cleaning fan can be used in different scenarios, improving versatility and maintainability. The impeller 102 of the cleaning fan adopts an integrated structure supported by a single spoke plate 107 in the middle, which can support the fan blades 108 without affecting the airflow entering from both ends of the volute 101, ensuring efficient air outlet; at the same time, due to the design of the first disassembly plate 105 and the second disassembly plate 106, the impeller 102 and the fan shaft 3 can be removed from the side during maintenance, which is convenient for inspection and maintenance; in addition, due to the modular design, the entire set of cleaning fans can be assembled before installation, and the whole can be installed together in the whole machine, and through the support connection of the first mounting seat 6 and the second mounting seat 7, it can be sealed with a sponge, which is convenient for assembly and maintenance.

[0054] In addition, according to a second aspect of the present invention, there is provided a harvester, the harvester comprising the cleaning fan as described above. Since the harvester is equipped with the cleaning fan, the use performance can be improved.

[0055] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A cleaning fan, characterized in that: The cleaning fan includes a turbine fan group, which includes a plurality of turbine fan bodies and a mounting assembly, wherein the mounting assembly includes a connecting bracket and a fan shaft, wherein the plurality of turbine fan bodies are sleeved on the fan shaft, and each turbine fan body is detachably connected to the connecting bracket.

2. The cleaning fan according to claim 1, characterized in that: The turbine blower body comprises a volute and an impeller, and the impeller is detachably mounted on the volute.

3. The cleaning fan according to claim 2, characterized in that: The volute includes an air inlet and an outer shell, the outer shell surrounds the air inlet, and a first disassembly plate and a second disassembly plate are provided on the side of the air inlet, and the first disassembly plate and the second disassembly plate are detachably installed on the air inlet.

4. The cleaning fan according to claim 2, characterized in that: The impeller includes a spoke plate and a plurality of blades arranged on both sides of the spoke plate.

5. The cleaning fan according to claim 4, characterized in that: A sleeve connector is also provided in the middle of the impeller, and the impeller is connected to the fan shaft through the sleeve connector; A plurality of the blades surround the sleeve; and / or The fan blades are formed into an S-shaped structure.

6. The cleaning fan according to claim 5, characterized in that: The first end of the fan blade is close to the sleeve, and the second end of the fan blade is close to the edge of the spoke plate; The angle between the tangent line of the second end of the fan blade and the tangent line of the edge of the web is 35°-50°.

7. The cleaning fan according to claim 1, characterized in that: The cleaning fan further comprises an air outlet group, the air outlet group comprises a plurality of air outlets, the plurality of air outlets are arranged in one-to-one correspondence with the plurality of turbine fan bodies, and the air outlets are detachably connected to the turbine fan bodies; Each of the air outlets comprises an air guide plate, and the air guide plate is arranged on the air outlet in an adjustable position.

8. The cleaning fan according to claim 1, characterized in that: A flow gap is arranged between two adjacent turbine blower bodies.

9. The cleaning fan according to claim 3, characterized in that: The mounting assembly further comprises a mounting seat, which is arranged at an end of the turbine fan unit and is detachably connected to the first disassembly plate and / or the second disassembly plate.

10. A harvester, characterized in that: The harvester comprises the cleaning blower according to any one of claims 1 to 9.

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