A fan impeller

Abstract

The present application discloses a fan impeller, comprising a central base and blades arranged around the central base, wherein the blades have a first blade surface and a second blade surface, the first blade surface and the second blade surface are mutually opposite, the first blade surface is provided with a first guide vane for realizing air supply of the fan, and the second blade surface is provided with a second guide vane for guiding the gas to flow from the center of the second blade surface to the surrounding. In addition to the first guide vane provided on the first blade surface, the fan impeller is also provided with a second guide vane on the second blade surface, when the second guide vane rotates with the blade, the second guide vane can generate a fan effect near the second blade surface, which can prevent fibers and short fibers from entering between the second blade surface and the installation wall plate of the impeller, and can also drive the fibers or short fibers that occasionally enter between the second blade surface and the installation wall plate of the impeller to be discharged in time, thereby effectively preventing the fan impeller from catching fire and improving the operation safety of the fan impeller.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a fan impeller. Background Art

[0002] The fan impeller is one of the important components of the fan.

[0003] Taking the cotton conveying fan as an example, the fan impeller of the cotton conveying fan generates wind when it rotates. This wind is used in the cotton opening and cleaning process or the cleaning and combing process to transport fibers. At present, cotton conveying fans mainly include two types: non-direct-connected cotton conveying fans and direct-connected fans. Due to the defects of non-direct-connected cotton conveying fans, such as complex structure, large size, large floor space, low reliability, and time-consuming and labor-intensive fan speed adjustment, the direct-connected cotton conveying fan has a simple and compact structure, is easy to operate, and occupies a small area, so direct-connected cotton conveying fans are needed in many occasions.

[0004] The impeller 01 of the direct-connected cotton conveying fan can be referred to Figures 1 to 4 , with 6 raised blades evenly distributed on the front, and 1 to 4 circular weight-reducing grooves 02 on the back, which are smooth and can be provided with 1 to 4 circular weight-reducing grooves 02. When working, the back of the impeller 01 is spaced about 4 mm from the installation wallboard of the impeller 01. The above-mentioned impeller 01 has the following defects when in use: fibers, especially short fibers, are easy to enter the narrow gap between the impeller 01 and the installation wallboard. At the same time, eddies are easy to form in the weight-reducing grooves on the back of the impeller 01. Under the combined influence of the eddies and the friction between the fibers, the fibers or short fibers will accumulate more and more on the back of the impeller 01 (especially around the impeller shaft), which is easy to cause the fibers or short fibers to burn and cause a large-scale fire, bringing great hidden dangers to the safe production of enterprises.

[0005] In summary, how to improve the operating safety of the impeller has become an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0006] The purpose of the present application is to provide a fan impeller that can significantly reduce or even prevent the accumulation of fibers or short fibers on the back of the impeller, thereby preventing the fibers or short fibers from catching fire.

[0007] To achieve the above-mentioned objectives, the present application provides a fan impeller, comprising a central base and blades arranged around the central base, the blades having a first blade surface and a second blade surface, the first blade surface and the second blade surface being the front and back surfaces of each other, the first blade surface being provided with a first guide vane for realizing air supply by the fan, and the second blade surface being provided with a second guide vane for guiding the gas to flow from the center of the second blade surface to the surrounding area.

[0008] In some embodiments, the second blade surface is provided with a plurality of second guide vanes; all the second guide vanes are distributed around the central base, and the height of any second guide vane relative to the second blade surface gradually increases from the center of the second blade surface toward the periphery.

[0009] In some embodiments, all the second guide vanes are far away from the center of the second blade surface and are adjacent to the outer peripheral edge of the second blade surface.

[0010] In some embodiments, the height of any second guide vane relative to the second blade surface is no more than 6 mm; the height of any first guide vane relative to the first blade surface is any value between 90 mm and 150 mm.

[0011] In some embodiments, the center of the second blade surface is concave toward the first blade surface, and the center of the first blade surface is convex toward a direction away from the second blade surface.

[0012] In some embodiments, the root of any second guide vane is connected to the second blade surface, and the top of any second guide vane is away from the second blade surface; the thickness of the second guide vane gradually decreases from the root to the top.

[0013] In some embodiments, the first blade surface is further provided with grooves, and at least part of the grooves are dynamic balancing deweighting grooves.

[0014] In some embodiments, the first blade surface is provided with a plurality of dynamic balancing deweighting grooves; all the dynamic balancing deweighting grooves are arranged around the center of the first blade surface.

[0015] In some embodiments, any one of the grooves has a smooth, curved inner wall.

[0016] In some embodiments, the diameter of any groove gradually decreases from the groove opening to the groove bottom.

[0017] Compared with the above-mentioned background technology, the fan impeller provided in the present application includes a central base and blades arranged around the central base, the blades having a first blade surface and a second blade surface, the first blade surface and the second blade surface are the front and back surfaces of each other, the first blade surface is provided with a first guide vane for realizing air supply of the fan, and the second blade surface is provided with a second guide vane for guiding the gas to flow from the center of the second blade surface to the surrounding area.

[0018] The fan impeller provided in the present application is provided with a second guide vane on the second blade surface in addition to the first guide vane on the first blade surface. The fan effect generated when the second guide vane rotates is used to prevent fibers and short fibers from entering between the second blade surface and the mounting wall panel of the impeller. The fibers or short fibers that occasionally enter between the second blade surface and the mounting wall panel of the impeller can also be guided to be discharged in time, which can effectively prevent fibers and short fibers from accumulating between the second blade surface and the mounting wall panel of the impeller, thereby preventing the impeller from catching fire and improving the operating safety of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 It is a structural schematic diagram of a direct-connected cotton conveying fan in the prior art;

[0021] Figure 2 for Figure 1 The local structural intention of the direct-connected cotton conveying fan at the impeller is shown;

[0022] Figure 3 for Figure 2 Cross-sectional view at BB;

[0023] Figure 4 for Figure 2 Cross-sectional view at CC;

[0024] Figure 5 A schematic diagram of the structure of a fan impeller provided in an embodiment of the present application;

[0025] Figure 6 for Figure 5 Sectional view at DD;

[0026] Figure 7 for Figure 5 Cross-sectional view at EE;

[0027] Figure 8 for Figure 7 Cross-sectional view at FF.

[0028] Among them, 01-impeller, 02-circular weight reduction groove, 1-center base, 2-blade, 201-first blade surface, 202-second blade surface, 21-first guide vane, 22-second guide vane, 23-groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Please refer to Figures 5 to 8 , Figure 5 A schematic diagram of the structure of a fan impeller provided in an embodiment of the present application; Figure 6 for Figure 5 Sectional view at DD; Figure 7 for Figure 5 Cross-sectional view at EE; Figure 8 for Figure 7 Cross-sectional view at FF.

[0032] Please refer to Figures 5 to 7 The present application provides a fan impeller, comprising a central base 1 and blades 2; the central base 1 can be connected to a rotating shaft such as a motor shaft, and the blades 2 are arranged around the central base 1; the blade 2 has a first blade surface 201 and a second blade surface 202, and the first blade surface 201 and the second blade surface 202 are the front and back surfaces of each other. In other words, one of the first blade surface 201 and the second blade surface 202 is the front side of the blade 2, and the other of the first blade surface 201 and the second blade surface 202 is the back side of the blade 2; the first blade surface 201 is provided with a first guide vane 21 for realizing the fan air supply, and the second blade surface 202 is provided with a second guide vane 22 for guiding the gas to flow from the center of the second blade surface 202 to the surrounding area.

[0033] In this embodiment, the shape of the blade 2 is related to the number of the blades 2. For example, the blade 2 can be in the shape of a ring or a disc, and the central base 1 can be set at the center of the aforementioned blade 2. Obviously, the number of the aforementioned blade 2 can be set to one. For another example, the blade 2 can be in the shape of a strip or a block, and a plurality of the aforementioned blades 2 are arranged around the central base 1. Regardless of the specific setting of the blade 2, in this embodiment, the first blade surface 201 and the second blade surface 202 are arranged on both sides of the blade 2 along the rotation axis of the blade 2, so the first blade surface 201 and the second blade surface 202 are respectively adjacent to the air inlet and the air outlet of the fan impeller. For example, the first blade surface 201 is the front side of the blade 2, which is adjacent to the air inlet of the fan impeller, and the second blade surface 202 is the back side of the blade 2, which is adjacent to the air outlet of the fan impeller. Among them, since the blade 2 rotates with the central base 1, the rotation axis of the blade 2 is often also the rotation axis of the central base 1.

[0034] The first blade surface 201 of the fan impeller is provided with a first guide vane 21. The first guide vane 21 has a fan blade feature, which can realize the fan air supply. In other words, the function of the fan impeller is mainly undertaken by the first guide vane 21. The specific shape, structure and installation method of the first guide vane 21 can be referred to. Figure 5 and Figure 6 , and reference may also be made to the relevant settings in the prior art.

[0035] The second blade surface 202 of the fan impeller is provided with a second guide vane 22. The second blade surface 202 may be provided with a plurality of second guide vanes 22, and the spacing between the second guide vanes 22 and the installation wall plate of the impeller is 1 to 2.5 mm. When the blade 2 rotates, all the second guide vanes 22 rotate accordingly, and the gas on the side where the second blade surface 202 is located can be guided to flow from the center of the second blade surface 202 to the periphery of the second blade surface 202. It can be seen that, on the one hand, the distance between the fan impeller and the impeller mounting wall plate in this embodiment is shortened, which can reduce the probability of fibers or short fibers entering the gap between the second guide vane 22 and the impeller mounting wall plate; on the other hand, when the fan impeller rotates at high speed, the second guide vane 22 arranged on the second blade surface 202 can also rotate rapidly, which can drive the gas around the second guide vane 22 to flow rapidly, so that the gas near the second blade surface 202 flows from the center of the second blade surface 202 toward the periphery of the second blade surface 202, forming an "electric fan" effect, preventing fibers or short fibers from entering the gap between the second guide vane 22 and the impeller mounting wall plate, and can also promptly bring out fibers or short fibers that accidentally enter between the second guide vane 22 and the impeller mounting wall plate.

[0036] In this embodiment, the shape of the second guide vane 22 can be the same as that of the first guide vane 21, or can be different from the shape of the first guide vane 21; the size of the second guide vane 22 is often much smaller than that of the first guide vane 21, so as to avoid the driving effect of the second guide vane 22 on the gas from significantly interfering with the driving effect of the first guide vane 21 on the gas.

[0037] In summary, the fan impeller provided in the present application is provided with a first guide vane 21 and a second guide vane 22 on the first blade surface 201 and the second blade surface 202 respectively. The first guide vane 21 is used to realize fan delivery, and the rotating second guide vane 22 is used to prevent fibers or short fibers from accumulating between the second blade surface 202 and the impeller mounting wall panel. In addition, the fibers or short fibers that occasionally enter between the second blade surface 202 and the impeller mounting wall panel can be guided to be discharged in time, which can effectively prevent the impeller from catching fire and improve the operating safety of the impeller.

[0038] The fan impeller provided in the present application is further described below in conjunction with the accompanying drawings and implementation methods.

[0039] In some embodiments, the second blade surface 202 is provided with a plurality of second guide vanes 22; all the second guide vanes 22 are arranged around the circumference of the central base 1, and any second guide vane 22 extends from the second blade surface 202 in a direction away from the first blade surface 201, or in other words, any second guide vane 22 extends along the thickness direction of the blade 2, for example, each second guide vane 22 extends toward Figure 6The dimension of the second guide vane 22 in the thickness direction of the blade 2 can be regarded as the height of the second guide vane 22. In addition, the second guide vane 22 often extends in the radial direction of the rotation surface of the blade 2, and the dimension of the second guide vane 22 in the radial direction of the rotation surface of the blade 2 can be regarded as the length of the second guide vane 22.

[0040] For reference Figure 6 and Figure 7 In the above embodiment, the height of the second guide vane 22 relative to the second blade surface 202 gradually increases from the center of the second blade surface 202 toward the periphery. In other words, the closer to the center of the second blade surface 202, the smaller the height of the second guide vane 22. Conversely, the closer to the circumferential edge of the second blade surface 202, the greater the height of the second guide vane 22. The above arrangement of the second guide vane 22 can form an air pressure difference between the center and the circumferential edge of the second blade surface 202, which is conducive to guiding the fibers and short fibers to be discharged out of the circumferential edge of the second blade surface 202.

[0041] like Figures 5 to 7 As shown, all the second guide vanes 22 are far away from the center of the second blade surface 202. At the same time, all the second guide vanes 22 are close to the peripheral edge of the second blade surface 202. This can form an air pressure difference between the center and the peripheral edge of the second blade surface 202, which is beneficial to guide the fibers and short fibers to be discharged outside the peripheral edge of the second blade surface 202.

[0042] In some embodiments, the height of any second guide vane 22 relative to the second blade surface 202 is not greater than 6 mm. For example, the height of one end of each second guide vane 22 close to the center of the second blade surface 202 is 2 mm, and the height of one end of each second guide vane 22 close to the circumferential edge of the second blade surface 202 is 6 mm. In addition, the height of any first guide vane 21 relative to the first blade surface 201 can be set to any value between 90 mm and 150 mm. It can be seen that the height of the first guide vane 21 is often 15 to 25 times the height of the second guide vane 22. Therefore, the air pressure generated by the second guide vane 22 near the second blade surface 202 has an extremely weak effect on the air pressure generated near the first blade surface 201, which can ensure that the first guide vane 21 can effectively play the air supply function of the fan impeller, and at the same time ensure that the driving effect of the second guide vane 22 on the gas will not cause obvious interference to the first guide vane 21.

[0043] exist Figure 6In the embodiment, the center of the second blade surface 202 is concave toward the first blade surface 201, and the center of the first blade surface 201 is bulging in the direction away from the second blade surface 202. Since the first blade surface 201 and the second blade surface 202 can be respectively regarded as the front and back of the blade 2, it can be seen that the center of the first blade surface 201 is bulging toward the front of the blade 2, and the center of the second blade surface 202 is concave toward the front of the blade 2, so that the center of the entire blade 2 is bent toward one side of the blade 2. The above-mentioned arrangement can enhance the structural strength of the blade 2, is also conducive to exerting the gas conveying ability of the first guide vane 21, and is also conducive to guiding the gas to flow along the second blade surface 202 according to a preset path.

[0044] For reference Figure 5 , Figure 7 and Figure 8 In some embodiments, any second guide vane 22 includes a root and a top, wherein the root is connected to the second blade surface 202 and the top is away from the second blade surface 202 . The height of the second guide vane 22 relative to the second blade surface 202 is the distance between the top of the second guide vane 22 and the second blade surface 202 .

[0045] The root of any second guide vane 22 is connected to the second blade surface 202, and the top of any second guide vane 22 is away from the second blade surface 202; the thickness of the second guide vane 22 gradually decreases from the root to the top. In other words, the root of the second guide vane 22 is relatively thick, and the top of the second guide vane 22 is relatively thin, which makes the two side surfaces of the second guide vane 22 have a certain slope. For example, the angle between each surface of the second guide vane 22 and the normal plane of the second blade surface 202 is 9.5°. This slope can make the two side surfaces of the second guide vane 22 easier to mold, and can also reduce the probability of fiber and short fibers accumulating and hooking here, which is conducive to the discharge of fibers and short fibers in the center of the second blade surface 202.

[0046] In addition, please refer to Figure 5 and Figure 6 In some embodiments, the first blade surface 201 is further provided with grooves 23, at least part of which is a dynamic balancing deweighting groove, which helps to improve the rotation performance of the blade 2 while reducing the weight of the blade 2. In addition to the dynamic balancing deweighting groove, the blade 2 can also be provided with grooves 23 on the first blade surface 201 for other functions, including but not limited to the grooves 23 for guiding flow.

[0047] Typically, the first blade surface 201 is provided with a plurality of dynamic balancing deweighting grooves, which are arranged around the center of the first blade surface 201. The distribution positions of the dynamic balancing deweighting grooves on the first blade surface 201 can be specifically set according to the specific shapes and sizes of different blades 2, ensuring that the dynamic balancing deweighting grooves can effectively maintain the dynamic balancing effect of the corresponding blade 2. Typically, each groove 23 is spaced a certain distance from the center of the blade 2.

[0048] like Figure 5 and Figure 6 As shown, any one of the grooves 23 has a smooth, curved inner wall of the groove 23; usually, various parts of the inner wall of the groove 23 are smoothly connected, and the inner wall of the groove 23 is also smoothly connected with the first blade surface 201, which can prevent the blade 2 from generating stress concentration at the groove 23, and can also effectively prevent fibers and short fibers from hooking and accumulating there, thereby reducing damage to the fibers and short fibers.

[0049] In the above embodiment, the diameter of each groove 23 gradually decreases from the groove mouth to the groove bottom. For example, any groove 23 is bowl-shaped, with its bowl mouth located at the first blade surface 201 and its bowl bottom located between the first blade surface 201 and the second blade surface 202.

[0050] In summary, the fan impeller provided by the present application utilizes the second guide vane 22 to drive the gas flow near the second blade surface 202, preventing fibers and short fibers from entering between the second blade surface 202 and the installation wallboard of the impeller, and driving the fibers and short fibers that accidentally enter between the second blade surface 202 and the installation wallboard of the impeller to be discharged in time; the fan impeller provided by the present application also adjusts the dynamic balance deweighting groove to the first blade surface 201 of the blade 2, so that the dynamic balance deweighting groove and the second guide vane 22 are arranged on both sides of the blade 2, in other words, the dynamic balance deweighting groove is located on the front of the blade 2, effectively preventing the fan impeller from generating eddy currents on the back of the blade 2, and reducing the probability of fibers and short fibers entering the back of the blade 2. The fan impeller provided by the present application has a simple and novel structure, and the design principle conforms to the characteristics of the law of air flow movement. It can be used as an impeller of a cotton conveying fan, and can effectively overcome the fire accident caused by the accumulation of cotton on the back of the impeller of the cotton conveying fan, and eliminate the safety production hidden dangers of enterprises using cotton conveying fans.

[0051] The above is a detailed introduction to the fan impeller provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A fan impeller, comprising a central base (1) and blades (2) arranged around the central base (1), the blades (2) having a first blade surface (201) and a second blade surface (202), the first blade surface (201) and the second blade surface (202) being opposite to each other, the first blade surface (201) being provided with a first guide vane (21) for realizing air supply by the fan, characterized in that: The second blade surface (202) is provided with a second guide vane (22) for guiding gas to flow from the center of the second blade surface (202) toward the periphery.

2. The fan impeller according to claim 1, characterized in that: The second blade surface (202) is provided with a plurality of second guide vanes (22); all of the second guide vanes (22) are distributed around the periphery of the central base (1), and the height of any second guide vane (22) relative to the second blade surface (202) gradually increases from the center of the second blade surface (202) toward the periphery.

3. The fan impeller according to claim 2, characterized in that: All of the second guide vanes (22) are far away from the center of the second blade surface (202) and are closely adjacent to the outer peripheral edge of the second blade surface (202).

4. The fan impeller according to claim 3, characterized in that: The height of any one of the second guide vanes (22) relative to the second blade surface (202) is not greater than 6 mm; and the height of any one of the first guide vanes (21) relative to the first blade surface (201) is any value between 90 mm and 150 mm.

5. The fan impeller according to claim 3, characterized in that: The center of the second blade surface (202) is concave toward the first blade surface (201), and the center of the first blade surface (201) is convex in a direction away from the second blade surface (202).

6. The fan impeller according to claim 3, characterized in that: The root of any second guide vane (22) is connected to the second blade surface (202), and the top of any second guide vane (22) is away from the second blade surface (202); the thickness of the second guide vane (22) gradually decreases from the root to the top.

7. The fan impeller according to any one of claims 1 to 6, characterized in that: The first blade surface (201) is further provided with a groove (23), and at least a portion of the groove (23) is a dynamic balancing deweighting groove.

8. The fan impeller according to claim 7, characterized in that: The first blade surface (201) is provided with a plurality of the dynamic balancing deweighting grooves; all of the dynamic balancing deweighting grooves are arranged around the center of the first blade surface (201).

9. The fan impeller according to claim 8, characterized in that: Any one of the grooves (23) has a smooth, curved inner wall.

10. The fan impeller according to claim 9, characterized in that: The diameter of any one of the grooves (23) gradually decreases from the groove opening to the groove bottom.

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