Blade and fan impeller adopting same

Abstract

The utility model discloses a blade which comprises a blade body, the blade body comprises a main body and a blade handle formed at the rear end of the main body, and an axial concave hole axially extending forwards is formed in the middle of the rear end face of the blade handle; a plurality of reinforcing ribs extending in the axial direction are formed on the inner side wall of the axial concave hole. The axial concave hole formed in the blade handle of the blade body can reduce the weight and the manufacturing cost, meanwhile, the reinforcing ribs formed on the inner side wall of the axial concave hole can improve the strength of the blade handle, the axial concave hole enables the thickness of the connecting portion of the blade handle and the body to be reduced, the shrinkage porosity phenomenon is not prone to occurring, and the service life of the blade body is prolonged. And the strength of the petiole and the main body and the qualified rate are ensured.

Description

Technical field:

[0001] The utility model relates to the technical field of fan equipment, and more specifically to a blade and a fan impeller using the blade. Background technology:

[0002] The existing fan includes a motor, an impeller and a casing, wherein the impeller includes a blade body and a hub.

[0003] For example, a fan hub with Chinese patent application number 201720168670.3 includes a hub body, a mounting groove provided on the hub body for mounting a blade handle, and a mounting slot connected to one end of the hub body axis and for the blade handle to be embedded, the diameter of the mounting slot is larger than the diameter of the mounting slot, the mounting slot is connected to an annular groove with a diameter larger than the mounting groove and for the blade handle to be embedded relative to the other end of the mounting slot, there is an inclined surface between the annular groove and the mounting groove or between the mounting groove and the mounting slot, the inclined surface contacts the blade handle to form a gap between the blade handle and the mounting groove. It utilizes a new mechanical structure to connect the mounting slot and the annular groove at both ends of the mounting groove, and to set the transition between the mounting slot and the mounting groove or between the mounting groove and the annular groove into an inclined surface, thereby improving the clamping force between the hub body and the blade handle.

[0004] However, in this structure, the petiole of the blade body is a solid body, which increases its weight. Moreover, since it is a solid body, this position is relatively thick when aluminum liquid is used for casting. Small holes with a small degree of dispersion, i.e. shrinkage, are easily formed in the thicker sections of the casting, at the junction of thick and thin sections or at hot nodes because the metal solution cannot immediately compensate for the shrinkage. This can easily cause the product to be unqualified, and the shrinkage-prone parts are prone to breakage. Utility model content:

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a blade and a fan impeller using the blade body. The axial recessed hole on the petiole of the blade body can reduce its weight and reduce manufacturing costs. At the same time, the reinforcing ribs formed on the inner wall of the axial recessed hole can improve the strength of the petiole. The axial recessed hole reduces the thickness of the connection between the petiole and the body, making it less likely to shrink, thereby ensuring the strength of the petiole and the body and the qualified rate.

[0006] The solution of the utility model to solve the technical problem is:

[0007] A blade comprises a blade body, wherein the blade body comprises a main body and a petiole formed at the rear end of the main body, and an axial concave hole extending axially forward is formed in the middle of the rear end surface of the petiole;

[0008] A plurality of axially extending reinforcing ribs are formed on the inner side wall of the axial recessed hole.

[0009] All the reinforcing ribs are evenly distributed on the inner side wall of the axial concave hole with the central axis of the axial concave hole as the center.

[0010] The top surface and the bottom surface of the molded part of the front end of the petiole and the rear end of the main body are both molded with reinforcement protrusions, and the outer side walls of the two reinforcement protrusions are conical wall surfaces.

[0011] A tapered hole section extending forward is formed at the front end of the axial recessed hole, and the tapered hole section extends to the inside of the two reinforcing protrusions.

[0012] A first radially extending edge in a ring shape is formed on the outer side wall of the rear end forming portion of the petiole and the main body.

[0013] A ring-shaped thickened extension portion extending radially outward is formed on the outer side wall of the rear end of the petiole.

[0014] The outer side wall of the thickened extension portion is a conical wall surface, and the outer diameter of the front end is large and the outer diameter of the rear end is small.

[0015] An annular groove is formed on the inner side wall of the rear end of the axial recessed hole at the thickened extension portion, and the rear end of the reinforcing rib extends to the inner side wall of the annular groove.

[0016] A fan impeller using the blade body described above, comprising a hub and a plurality of blade bodies;

[0017] The wheel hub is composed of two upper and lower half hub bodies connected by bolts;

[0018] A plurality of arc-shaped mounting grooves corresponding to each other are formed on the relative wall surfaces of the edge portions of the two half-hub bodies, and the outer ends of the arc-shaped mounting grooves extend out of the side walls of the half-hub bodies. An annular raised limiting portion is formed on the inner wall of the front portion of the arc-shaped mounting grooves. The front end face and the rear end face of the annular raised limiting portion are both conical wall surfaces. The petiole is inserted between the two corresponding arc-shaped mounting grooves, and the rear end face of the first radially extending edge is pressed against the front end face of the corresponding annular raised limiting portion, and the front end face of the thickened extension portion is pressed against the rear end face of the corresponding annular raised limiting portion.

[0019] A central mounting through hole aligned and connected to each other is formed in the middle of the two half-hub bodies, and a plurality of middle connecting through holes corresponding to and aligned to each other are formed on the half-hub bodies around the central mounting through hole of the two half-hub bodies, a convex portion extending outward is formed on the top surface of the edge of the half-hub body corresponding to the upper arc-shaped mounting groove, and a convex portion extending outward is formed on the bottom surface of the edge of the half-hub body corresponding to the lower arc-shaped mounting groove;

[0020] A first connection reinforcement rib is formed on the outer end surface of the half-hub body between each two adjacent protrusions, and both ends of the first connection reinforcement rib are formed on the outer side walls of the two adjacent protrusions. Edge connection through holes are formed on the half-hub body at both sides of the protrusions, and the edge connection through holes of the upper and lower half-hub bodies correspond to each other one by one;

[0021] An annular reinforcement portion is formed on the outer end surface around the central mounting through hole of the half hub body, an annular raised reinforcement rib is formed on the middle outer end surface of the half hub body, the annular raised reinforcement rib is between the corresponding raised portion and the annular reinforcement portion, a first reinforcement rib is formed on the outer end surface of the half hub body between the outer side wall of the annular reinforcement portion and the inner end surface of the corresponding raised portion, one end of the first reinforcement rib is formed on the inner end surface of the corresponding raised portion, and the other end is formed on the outer side wall of the annular reinforcement portion, and the middle part of the first reinforcement rib is staggered and formed together with the annular raised reinforcement rib.

[0022] The outstanding effects of the utility model are:

[0023] 1. The axial concave hole on the petiole of the blade body can reduce its weight and manufacturing cost;

[0024] 2. The reinforcing ribs formed on the inner wall of the axial concave hole can improve the strength of the petiole, and the axial concave hole reduces the thickness of the connection between the petiole and the main body, making it less likely to shrink, thereby ensuring the strength of the petiole and the main body and the qualified rate. Description of the drawings:

[0025] Figure 1 It is a schematic diagram of the partial structure between the half hub body and the blade body of the utility model;

[0026] Figure 2 yes Figure 1 Schematic diagram of the angle-changing local structure;

[0027] Figure 3 It is a partial cross-sectional view between two half-hub bodies and a blade body of the utility model;

[0028] Figure 4 yes Figure 3 A partial enlarged view of

[0029] Figure 5 It is a schematic diagram of the local structure of the blade body;

[0030] Figure 6 is a partial cross-sectional view of the blade body;

[0031] Figure 7 It is a partial front view of the blade body;

[0032] Figure 8 It is a front view of the half hub body;

[0033] Fig. 9 yes Figure 1 A partial enlarged view of . Specific implementation method:

[0034] For example, see Figures 1 to 9 As shown, a blade comprises a blade body 10, wherein the blade body 10 comprises a main body 11 and a petiole 12 formed at the rear end of the main body 11, and an axial concave hole 13 extending axially forward is formed at the middle of the rear end surface of the petiole 12;

[0035] A plurality of axially extending reinforcing ribs 14 are formed on the inner side wall of the axial recessed hole 13 .

[0036] All the reinforcing ribs 14 are evenly distributed on the inner side wall of the axial recessed hole 13 with the central axis of the axial recessed hole 13 as the center.

[0037] A first radially extending edge 16 in an annular shape is formed on the outer side wall of the rear end portion of the petiole 12 and the main body 11 .

[0038] A ring-shaped thickened extension portion 17 extending radially outward is formed on the outer side wall of the rear end of the petiole 12 .

[0039] The outer wall of the thickened extension portion 17 is a conical wall surface, and its front end has a larger outer diameter than the rear end.

[0040] An annular groove is formed on the inner side wall of the rear end of the axial recessed hole 13 at the thickened extension portion 17 , and the rear end of the reinforcing rib 14 extends to the inner side wall of the annular groove.

[0041] The front end surface of the thickened extension portion 17 is a tapered wall surface, and the rear end surface of the first radially extending edge 16 is a tapered wall surface.

[0042] In this embodiment, an axial recessed hole 13 extending axially forward is formed in the middle of the rear end surface of the petiole 12; this can reduce its weight and manufacturing cost;

[0043] A plurality of axially extending reinforcing ribs 14 are formed on the inner side wall of the axial concave hole 13. The reinforcing ribs 14 increase the strength of the inner side wall of the axial concave hole 13, so that the strength can be guaranteed while reducing the weight.

[0044] Furthermore, the top and bottom surfaces of the parts formed at the front end of the petiole 12 and the rear end of the main body 11 are both formed with reinforcing protrusions 15, and the outer side walls of the two reinforcing protrusions 15 are conical wall surfaces.

[0045] A tapered hole section 131 extending forward is formed at the front end of the axial recessed hole 13 , and the tapered hole section 131 extends to the inside of the two reinforcing protrusions 15 .

[0046] This reinforcing protrusion 15 increases the connection strength between it and the main body 11. At the same time, due to the increase of the reinforcing protrusion 15, the thickness of the connection end between it and the main body 11 is increased. At this time, a tapered hole section 131 extending forward is formed through the front end of the axial recessed hole 13, and the tapered hole section 131 extends to the inside of the two reinforcing protrusions 15, thereby reducing the thickness of the wall panel connecting the reinforcing protrusion 15 and the main body 11. In this way, the part between the reinforcing protrusion 15 and the main body 11 is not prone to shrinkage problems during casting (due to the thinning of the thickness of the forming part, it is easy to compensate for shrinkage and forming, and it is not easy to have scattered small holes), thereby improving its qualified rate, and this position is not easy to break, thereby ensuring the manufacturing quality.

[0047] A fan impeller using the above blades, comprising a hub and a plurality of blade bodies 10;

[0048] The wheel hub is composed of two upper and lower half hub bodies 20 connected by bolts;

[0049] A plurality of upper and lower corresponding arc-shaped mounting grooves 21 are formed on the relative wall surfaces of the edges of the two half-hub bodies 20. The outer ends of the arc-shaped mounting grooves 21 extend out of the side walls of the half-hub bodies 20. An annular raised limiting portion 22 is formed on the inner wall of the front portion of the arc-shaped mounting grooves 21. The front end face and the rear end face of the annular raised limiting portion 22 are both conical wall surfaces. The petiole 12 is inserted between the two upper and lower corresponding arc-shaped mounting grooves 21. The rear end face of the first radial extension edge 16 cooperates with and presses against the front end face of the corresponding annular raised limiting portion 22, and the front end face of the thickened extension portion 17 cooperates with and presses against the rear end face of the corresponding annular raised limiting portion 22.

[0050] A central mounting through hole 23 aligned and connected to each other is formed in the middle of the two half-hub bodies 20, and a plurality of middle connecting through holes 24 corresponding to and aligned to each other are formed on the half-hub bodies 20 around the central mounting through hole 23 of the two half-hub bodies 20. A convex portion extending outward is formed on the top surface of the edge of the half-hub body 20 corresponding to the upper arc-shaped mounting groove 21, and a convex portion extending outward is formed on the bottom surface of the edge of the half-hub body 20 corresponding to the lower arc-shaped mounting groove 21;

[0051] A first connecting reinforcing rib 25 is formed on the outer end surface of each half hub body 20 between two adjacent protrusions, and both ends of the first connecting reinforcing rib 25 are formed on the outer side walls of the two adjacent protrusions. Edge connecting through holes 26 are formed on the half hub body 20 at both sides of the protrusions, and the edge connecting through holes 26 of the upper and lower half hub bodies 20 correspond to each other.

[0052] An outer groove 27 extending inward is formed on the outer wall at the outer end of the protrusion, an outer reinforcing rib 271 is formed on the inner wall surface of the middle part of the outer groove 27, and two ends of the outer reinforcing rib 271 are formed on the two end surfaces of the outer groove 27;

[0053] An annular reinforcement portion 231 is formed on the outer end surface around the central mounting through hole 23 of the semi-hub body 20, and an annular raised reinforcement rib 28 is formed on the middle outer end surface of the semi-hub body 20. The annular raised reinforcement rib 28 is located between the corresponding raised portion and the annular reinforcement portion 231. A first reinforcement rib 29 is formed on the outer end surface of the semi-hub body 20 between the outer side wall of the annular reinforcement portion 231 and the inner end surface of the corresponding raised portion. One end of the first reinforcement rib 29 is formed on the inner end surface of the corresponding raised portion, and the other end is formed on the outer side wall of the annular reinforcement portion 231. The middle part of the first reinforcement rib 29 is staggered and molded together with the annular raised reinforcement rib 28.

[0054] This structure is pressed and fixed by the tapered wall surface of the front end face and the rear end face of the annular raised limiting part 22 and the rear end face of the first radially extending edge 16 and the front end face of the thickened extension part 17. At the same time, the installation position of the petiole 12 is positioned to ensure its accurate installation and reduce deformation. At the same time, it adopts the tapered wall surface to press and fix, increase its holding force, so that when the edge connecting through holes 26 of the two half-hub bodies 20 are fixed by bolts, that is, when the two corresponding raised parts above and below clamp and fix the petiole 12, the size of the bolt inserted into the edge connecting through hole 26 can be reduced. For example, originally a φ12mm bolt is required, at this time, only a φ10mm bolt is needed for fixing, thereby reducing the cost.

[0055] When the size of the bolt is reduced, the thickness of the two half-hub bodies 20 can be reduced, thereby reducing the manufacturing cost.

[0056] When the thickness of the half hub body 20 is reduced, an annular reinforcement portion 231, an annular raised reinforcement rib 28, a first reinforcement rib 29, etc. are provided on the end surface to ensure the strength of the half hub body 20.

[0057] This embodiment reduces the weight and manufacturing cost of the semi-hub body 20 and the blade body 10 while ensuring their strength, thereby meeting the design requirements.

[0058] At the same time, an upwardly extending positioning protrusion strip 1 is formed on the outer wall of the protrusion near the outer side, and a plurality of positioning alignment protrusions 2 are formed on the annular side wall of the first radially extending edge 16 of the corresponding blade body 10, and the positioning alignment protrusions 2 correspond to the corresponding positioning protrusion strips 1.

[0059] It facilitates the installation of the blade body 10 and the half hub body 20 by aligning the positioning and aligning protrusions 2 with the corresponding positioning protrusion strips 1;

[0060] At the same time, the positioning protrusion strip 1 is located on the outer wall of the protrusion near the outer side, and a plurality of positioning alignment protrusions 2 are also formed on the annular side wall of the first radial extension edge 16. The positioning alignment protrusions 2 and the positioning protrusion strip 1 are both vertically extended on the corresponding side walls. The two side walls of the positioning protrusion strip 1 and the positioning alignment protrusion 2 are inclined toward the middle, thereby facilitating demolding in the vertical direction without interference, thereby ensuring manufacturing through casting molding.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A blade, comprising a blade body (10), characterized in that: The blade body (10) comprises a main body (11) and a petiole (12) formed at the rear end of the main body (11); an axial concave hole (13) extending axially forward is formed in the middle of the rear end surface of the petiole (12); A plurality of axially extending reinforcing ribs (14) are formed on the inner side wall of the axial recessed hole (13).

2. A blade according to claim 1, characterized in that: All the reinforcing ribs (14) are evenly distributed on the inner side wall of the axial concave hole (13) with the central axis of the axial concave hole (13) as the center.

3. A blade according to claim 1, characterized in that: The top and bottom surfaces of the molded parts of the front end of the petiole (12) and the rear end of the main body (11) are both molded with reinforcement protrusions (15), and the outer side walls of the two reinforcement protrusions (15) are conical wall surfaces.

4. A blade according to claim 3, characterized in that: A tapered hole section (131) extending forward is formed at the front end of the axial recessed hole (13), and the tapered hole section (131) extends to the interior of the two reinforcing protrusions (15).

5. A blade according to claim 1, characterized in that: A first radially extending edge (16) in the shape of a ring is formed on the outer side wall of the rear end molded portion of the petiole (12) and the main body (11).

6. A blade according to claim 5, characterized in that: A ring-shaped thickened extension portion (17) extending radially outward is formed on the outer side wall of the rear end of the petiole (12).

7. A blade according to claim 6, characterized in that: The outer wall of the thickened extension portion (17) is a conical wall surface, with a larger outer diameter at the front end and a smaller outer diameter at the rear end; An annular groove is formed on the rear end inner side wall of the axial recessed hole (13) at the thickened extension portion (17), and the rear end of the reinforcing rib (14) extends to the inner side wall of the annular groove.

8. A blade according to claim 6, characterized in that: The front end surface of the thickened extension portion (17) is a tapered wall surface, and the rear end surface of the first radially extending edge (16) is a tapered wall surface.

9. A fan impeller using the blades according to any one of claims 1 to 8, characterized in that: It comprises a hub and a plurality of blade bodies (10); The wheel hub is composed of two upper and lower half hub bodies (20) fixedly connected by bolts; A plurality of upper and lower corresponding arc-shaped mounting grooves (21) are formed on the relative wall surfaces of the edge portions of the two half-hub bodies (20), the outer ends of the arc-shaped mounting grooves (21) extend out of the side walls of the half-hub bodies (20), an annular raised limiting portion (22) is formed on the inner side wall of the front portion of the arc-shaped mounting grooves (21), the front end face and the rear end face of the annular raised limiting portion (22) are both conical wall surfaces, the petiole (12) is inserted between the two upper and lower corresponding arc-shaped mounting grooves (21), the rear end face of the first radially extending edge (16) is pressed against the front end face of the corresponding annular raised limiting portion (22), and the front end face of the thickened extension portion (17) is pressed against the rear end face of the corresponding annular raised limiting portion (22).

10. The fan impeller according to claim 9, characterized in that: A central mounting through hole (23) aligned vertically and communicating with each other is formed in the middle of the two half-hub bodies (20); a plurality of central connecting through holes (24) corresponding vertically and aligned are formed on the half-hub bodies (20) around the central mounting through holes (23) of the two half-hub bodies (20); a top surface of the edge of the half-hub body (20) corresponding to the upper arc-shaped mounting groove (21) is formed with a protrusion extending outward; and a bottom surface of the edge of the half-hub body (20) corresponding to the lower arc-shaped mounting groove (21) is formed with a protrusion extending outward; A first connection reinforcement rib (25) is formed on the outer end surface of the half hub body (20) between each two adjacent protrusions, and two ends of the first connection reinforcement rib (25) are formed on the outer side walls of the two adjacent protrusions. Edge connection through holes (26) are formed on the half hub body (20) at both sides of the protrusions, and the edge connection through holes (26) of the upper and lower half hub bodies (20) correspond to each other one by one. An outer groove (27) extending inwardly is formed on the outer side wall at the outer end of the protrusion, an outer reinforcing rib (271) is formed on the inner wall surface of the middle portion of the outer groove (27), and two ends of the outer reinforcing rib (271) are formed on two end surfaces of the outer groove (27); An upwardly extending positioning protrusion strip (1) is formed on the outer side wall of the protrusion portion near the outer side, and a plurality of positioning alignment protrusions (2) are formed on the annular side wall of the first radially extending edge (16) of the corresponding blade body (10), and the positioning alignment protrusions (2) correspond to the corresponding positioning protrusion strips (1).

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