Fan blade capable of reducing unbalance amount of rotor and fan

Abstract

The utility model discloses a fan blade capable of reducing unbalance of a rotor and a fan, and belongs to the technical field of fan blades, the fan blade capable of reducing unbalance of the rotor comprises a blade and a non-injection-molded magnetic sleeve, the magnetic sleeve comprises a sleeve body with one end open and the other end sealed, and the edge of the opening of the sleeve body extends towards the circumferential side to form a bottom edge. Each blade comprises a blade body and a bottom ring which are integrally formed through injection molding, the bottom ring is a ring body wrapping the edge of the bottom edge, and the bottom ring is connected with the multiple blade bodies; a plurality of glue adding holes are annularly formed in the bottom ring and used for containing balance glue. A fan includes blades that reduce the amount of rotor imbalance. The rotor dynamic balance effect is improved, and the overall strength of the fan blade is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan blades, and in particular relates to a fan blade and a fan that reduce the unbalance of a rotor. Background Art

[0002] The fan rotor includes blades, fan shaft and magnetic ring, such as Figure 1 As shown, the fan blades include a magnetic sleeve and several blades surrounding the sleeve. The magnetic sleeve includes a plastic outer sleeve integrally molded with the blades and a metal inner sleeve. One end of the plastic outer sleeve is sealed and covers the outside of the metal inner sleeve. The plastic outer sleeve and blades are both produced by injection molding. During the injection molding process, the horizontality of the molded product cannot be controlled. Most fan blades are injection molded structures, resulting in a large initial imbalance of the rotor. The fan generates noise and vibration during operation, reducing the fan's operating efficiency and accelerating the wear of various components.

[0003] In the prior art, the fan is adjusted to a balanced state through a fan dynamic balancing test. That is, during the fan dynamic balancing test, the method of adding balancing glue is adopted to offset the imbalance. Because the initial imbalance of the rotor is large, the volume of the added balancing glue is large, resulting in insufficient space or position on the rotor to install the balancing glue. Utility Model Content

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a fan blade that reduces the unbalance of the rotor, including a blade and a non-injection molded magnetic sleeve;

[0005] The magnetic sleeve comprises an opening at one end and a sealed sleeve body at the other end, wherein the edge of the opening of the sleeve body extends outwardly to form a bottom edge;

[0006] The blade includes a sheet body and a bottom ring formed by injection molding. The bottom ring is a ring body covering the edge of the bottom side, and the bottom ring connects a plurality of the sheet bodies.

[0007] The upper ring of the bottom ring is provided with a plurality of glue holes for accommodating balancing glue.

[0008] Specifically, the magnetic sleeve is made of steel.

[0009] Specifically, the blade further includes a top ring, and the blade body includes a top edge and a bottom edge that are oppositely arranged, the top edge is connected to the top ring, and the bottom edge is connected to the bottom ring.

[0010] Specifically, the top ring is provided with grooves, and the grooves and the sheet bodies are staggered.

[0011] Specifically, the bottom ring includes an upper limit edge that fits the upper surface of the bottom edge and a lower limit edge that fits the lower surface of the bottom edge, and the glue adding hole is opened on the lower limit edge.

[0012] Specifically, several first limiting pieces are annularly arranged inside the upper limiting edge, and several second limiting pieces are annularly arranged inside the lower limiting edge. Both the first limiting pieces and the second limiting pieces are attached to the bottom edge.

[0013] Specifically, several glue injection holes are formed in the bottom edge. During the injection molding process of the blade, the glue injection holes provide channels for the glue-like raw material to flow into the mold cavity.

[0014] A fan includes a fan blade that reduces the rotor unbalance.

[0015] The technical solution provided by the present utility model has the following advantages compared with the prior art:

[0016] 1. Extend the magnetic sleeve, and use the bottom edge formed by the extension as the part connecting the blade. There is no plastic structure on the top and the circumferential side of the magnetic sleeve, which improves the heat dissipation performance of the fan, reduces the plastic structure on the fan blade, improves the forming accuracy of the central area of the fan blade, reduces the initial unbalance of the rotor, and improves the dynamic balance effect of the rotor.

[0017] 2. When the blade is injection molded, the bottom ring wraps the bottom edge, and the magnetic sleeve and the blade are an integrated structure, with a firm connection between the two, ensuring the overall strength of the fan blade and meeting the requirements of the centrifugal force generated during the rotation of the fan blade.

[0018] 3. Set glue injection holes to accommodate the balancing glue, provide a space for the balancing glue, and increase the constraint on the balancing glue, so that the balancing glue does not shift due to the centrifugal force, further improving the dynamic balance effect of the rotor. Description of the Drawings

[0019] Figure 1 is the structural diagram of the fan blade in the embodiment of the present utility model;

[0020] Figure 2 is the axial sectional view of the fan blade in the embodiment of the present utility model

[0021] Figure 3 is the structural diagram of the magnetic sleeve in the embodiment of the present utility model;

[0022] Figure 4 is the structural diagram of the blade in the embodiment of the present utility model;

[0023] Figure 5 is the distribution diagram of the glue injection hole positions of the blade in the embodiment of the present utility model;.

[0024] As shown in the figure: 1. Magnetic sleeve; 11. Sleeve body; 12. Bottom edge; 13. Top; 14. Glue injection hole; 15. Shaft hole; 2. Blade; 21. Blade body; 22. Bottom ring; 221. Upper limit edge; 222. Lower limit edge; 223. First limit piece; 224. Second limit piece; 225. Glue adding hole; 23. Top ring; 231. Groove. Detailed implementation mode

[0025] For the convenience of understanding, the following describes the fan blade and the fan for reducing the rotor unbalance amount in conjunction with the embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation and positional relationship shown in the drawings. It is 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 of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] As Figure 1 shown, in this embodiment, the fan blade for reducing the rotor unbalance amount includes a steel magnetic sleeve 1 and a blade 2 arranged on the outer periphery of the magnetic sleeve 1.

[0029] As Figure 2 and Figure 3 shown, the magnetic sleeve 1 is in a cylindrical shape. The magnetic sleeve 1 includes a sleeve body 11 and a bottom edge 12. The sleeve body 11 has a top end and a bottom end arranged oppositely. Among them, the top end is closed to form a top 13. An axis hole 15 is opened at the center of the top 13. The axis hole 15 is used to insert the fan shaft. The bottom end is open, and a bottom edge 12 is extended outward to the circumferential side at the edge of the opening. Four glue injection holes 14 are arranged in a ring on the bottom edge 12. During the injection molding process of the blade 2, the glue injection holes 14 provide a channel for the glue-like raw material to flow into the mold cavity.

[0030] As Figure 4As shown in the figure, the blade 2 includes a blade body 21, a bottom ring 22 and a top ring 23 which are integrally formed by injection molding. The blade body 21 includes an inner edge and an outer edge which are oppositely arranged. The inner edge has an inner edge apex angle and an inner edge bottom angle, and the outer edge has an outer edge apex angle and an outer edge bottom angle. The apex angles of the outer edges of several blade bodies 21 are connected to the top ring 23, and the bottom angles of the inner edges of several blade bodies 21 are connected to the bottom ring 22.

[0031] Continuing as Figure 4 shown, the top ring 23 is provided with a groove 231 with an upward opening. The groove 231 and the blade body 21 are staggered, that is, there is a groove 231 between adjacent blade bodies 21.

[0032] As Figure 1 and Figure 4 shown, the bottom ring 22 is parallel to the top ring 23, and the centers of the two rings are the same. The inner side wall of the bottom ring 22 is in mutual fit with the outer side wall of the bottom edge 12. The height of the inner side wall of the bottom ring 22 is higher than that of the outer side wall of the bottom edge 12. There is a part of the upper end of the inner side wall of the bottom ring 22 that is not in fit with the outer side wall of the bottom edge 12, and this part extends inward to form an upper limit edge 221 that covers the upper surface of the bottom edge 12. There is a part of the lower end of the inner side wall of the bottom ring 22 that is not in fit with the outer side wall of the bottom edge 12, and this part extends inward to form a lower limit edge 222 that covers the lower surface of the bottom edge 12. That is, the bottom ring 22 covers the edge of the bottom edge 12 in a circle, and the connection between the blade 2 and the magnetic sleeve 1 is firm; several first limit pieces 223 are annularly arranged inside the upper limit edge 221, and several second limit pieces 224 are annularly arranged inside the lower limit edge 222. The first limit pieces 223 and the second limit pieces 224 are both in fit with the bottom edge 12, and the positions of the first limit pieces 223 and the second limit pieces 224 overlap in the axial direction of the fan blade. The first limit pieces 223 locally extend the upper limit edge 221, and the second limit pieces 224 locally extend the lower limit edge 222, enhancing the covering of the bottom ring 22 on the bottom edge 12 and further improving the connection tightness between the magnetic sleeve 1 and the blade 2.

[0033] As Figure 5 shown, several glue adding holes 225 are arranged on the lower limit edge 222 in an annular array. The glue adding holes 225 are used to accommodate balance glue, so that the balance glue will not be affected by centrifugal force and shift its position during the dynamic balance test of the fan rotor due to incomplete solidification.

[0034] The injection molding method of the fan blade in this embodiment includes the following steps:

[0035] S1: Produce the magnetic sleeve 1 with steel as the raw material;

[0036] S2: Place the magnetic sleeve 1 into the mold cavity of the mold. The space in the mold cavity not occupied by the magnetic sleeve 1 has the same shape as the blade 2;

[0037] S3: Inject plastic raw material into the mold cavity through the glue injection hole 14 on the magnetic sleeve 1;

[0038] S4: After the plastic raw material is cooled and molded, it is demolded to obtain the fan blade.

[0039] In this embodiment, the fan includes a fan blade for reducing the rotor unbalance amount, and also includes a fan shaft, a fan frame and a motor. One end of the fan shaft is connected to the magnetic sleeve 1, and the other end is inserted into the motor, and the motor is assembled in the fan frame.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fan blade for reducing the rotor unbalance amount, characterized in that It includes a blade and a non-injection-molded magnetic sleeve; The magnetic sleeve includes a sleeve body with one end open and the other end sealed. An edge at the open end of the sleeve body extends outward to the circumferential side to form a bottom edge; The blade includes a sheet body and a bottom ring formed by integral injection molding. The bottom ring is a ring body that wraps the edge of the bottom edge, and the bottom ring connects several of the sheet bodies; Several glue adding holes are provided on the bottom ring for accommodating balancing glue.

2. The blade for reducing rotor imbalance according to claim 1, characterized in that: The magnetic sleeve is made of steel.

3. The fan blade for reducing the rotor unbalance amount as claimed in claim 1, wherein The blade further includes a top ring. The sheet body includes a top edge and a bottom edge arranged oppositely. The top edge connects the top ring, and the bottom edge connects the bottom ring.

4. The fan blade for reducing the rotor unbalance amount as claimed in claim 3, wherein A groove is formed on the top ring, and the groove and the sheet body are staggered.

5. The fan blade for reducing the rotor unbalance amount as claimed in claim 1, wherein The bottom ring includes an upper limiting edge that fits the upper surface of the bottom edge and a lower limiting edge that fits the lower surface of the bottom edge. The glue adding holes are formed on the lower limiting edge.

6. The fan blade for reducing the rotor unbalance amount according to claim 5, wherein, Several first limiting pieces are arranged on the inner side of the upper limiting edge in a ring shape, and several second limiting pieces are arranged on the inner side of the lower limiting edge in a ring shape. The first limiting pieces and the second limiting pieces both fit the bottom edge.

7. The fan blade for reducing the rotor unbalance amount as claimed in claim 1, wherein Several glue injection holes are formed on the bottom edge. During the injection molding process of the blade, the glue injection holes provide channels for the glue-like raw material to flow into the mold cavity.

8. A fan, characterized in that, It includes the fan blade for reducing the rotor unbalance amount according to any one of claims 1-7.

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