Cross-flow fan blade steel shaft disc with burn-proof structure

Abstract

The utility model relates to the field of cross-flow fan blade middle wind wheel welding, especially relates to a cross-flow fan blade steel axle disc with burn prevention structure, including wheel hub disc, a plurality of connecting grooves are arranged on the wheel hub disc, a plurality of connecting grooves are annularly arranged on the wheel hub disc, welding grooves are equipped in the connecting grooves, the bottom of welding groove is equipped with the convex edge structure for welding with the blade root and the burn prevention groove, the burn prevention groove is located the one end of welding groove far from the center of wheel hub disc, by setting up the burn prevention groove at the end of welding groove, the burn prevention groove corresponds the edge position of middle wind wheel blade, avoids the edge position of middle wind wheel blade and the wheel hub disc welding through the burn prevention groove, thereby avoids the burn of middle wind wheel blade, cuts the burn prevention groove on the wheel hub disc, reduces the weight of wheel hub disc, reduces the risk product output, improves the delivery quality of cross-flow fan blade.

Description

Technical Field

[0001] This utility model relates to the field of welding of wind turbines in cross-flow fan blades, and in particular to a steel shaft disc of a cross-flow fan blade with a burn-proof structure. Background Technology

[0002] In the cross-flow fan manufacturing line, the steel shaft disc and the central impeller need to be welded by an ultrasonic welding machine. Before welding, the blades of the central impeller need to be aligned with the welding groove on the steel shaft disc. Then, ultrasonic waves are used to connect and fix the blades to the steel shaft disc, thus assembling the cross-flow fan.

[0003] However, the power of the ultrasonic welding machine is fixed, and the blades are curved on the cross-section where the wind turbine blades connect to the steel shaft disc. The blades are also thinner at the edge, which makes it impossible to ensure both the weld strength and the avoidance of blade burn when the ultrasonic welding machine welds the wind turbine blades to the steel shaft disc as a whole. After welding, there are more risky products produced, making it difficult to guarantee the production quality of the cross-flow wind turbine blades. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing ultrasonic welding machines in welding wind turbine blades and steel shaft discs as a whole, which cannot simultaneously ensure welding strength and prevent blade burns, and to provide a cross-flow wind turbine blade steel shaft disc with an anti-burn structure.

[0005] This utility model provides a cross-flow fan blade steel shaft disc with a burn-proof structure, comprising: A wheel hub disc, wherein a plurality of connecting grooves are provided on the wheel hub disc, and the plurality of connecting grooves are arranged in a ring on the wheel hub disc; The connecting groove is provided with a welding groove. The bottom of the welding groove is provided with a raised ridge structure for welding to the root of the blade and an anti-burn groove. The anti-burn groove is located at the end of the welding groove away from the center of the hub disc.

[0006] Preferably, the welding groove is an arc-shaped groove.

[0007] Preferably, the convex ridge structure includes an arc-shaped convex ridge along the arc-shaped groove and a transverse convex ridge perpendicular to the arc-shaped convex ridge.

[0008] Preferably, the arc-shaped protrusion is spaced apart from the sidewall of the welding groove.

[0009] Preferably, the two ends of the transverse convex ridge are respectively connected to the sidewall of the connecting groove.

[0010] Preferably, the cross-sectional area of ​​the arc-shaped convex ridge gradually increases from the top to the bottom; and the cross-sectional area of ​​the transverse convex ridge gradually increases from the top to the bottom.

[0011] Preferably, the connecting groove is an arc-shaped groove, and the welding groove is located in the middle of the connecting groove.

[0012] Preferably, the edge of the connecting groove to the edge of the welding groove is an arc-shaped curved surface.

[0013] Preferably, the outline of the burn-proof groove coincides with the outline of the end of the welding groove.

[0014] Preferably, the wheel hub disc and the convex rib structure are integrally molded structural components made of polypropylene.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a cross-flow fan blade steel shaft disc with an anti-burn structure. By opening an anti-burn groove at the end of the welding groove, the anti-burn groove corresponds to the edge position of the wind turbine blade. The anti-burn groove prevents the edge position of the wind turbine blade from being welded to the hub disc, thereby avoiding the wind turbine blade from being burned. Cutting the anti-burn groove on the hub disc reduces the weight of the hub disc, reduces the output of risky products, and improves the delivery quality of the cross-flow fan blade. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a cross-flow fan blade steel shaft disk with an anti-burn structure according to the present invention; Figure 2 This is a schematic diagram of the connecting groove structure of a cross-flow fan blade steel shaft disc with an anti-burn structure according to the present invention. Figure 3 This is a top view schematic diagram of a cross-flow fan blade steel shaft disk with an anti-burn structure according to the present invention. Figure 4 This is a schematic diagram of the AA section of a cross-flow fan blade steel shaft disk with a burn-proof structure according to the present invention.

[0017] Marked in the image: 1-Steel shaft, 2-Hub disc, 3-Welding groove, 4-Anti-burn groove, 5-Connecting groove, 6-Protruding rib structure, 61-Arc-shaped protruding rib, 62-Transverse protruding rib. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0019] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0021] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0022] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0023] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0024] Example 1 like Figures 1-4 As shown, a cross-flow fan blade steel shaft disc with an anti-burn structure includes a hub disc 2. Several connecting grooves 5 are formed on the hub disc 2, and the connecting grooves 5 are arranged in a ring on the hub disc 2. A welding groove 3 is provided in the connecting groove 5. The bottom of the welding groove 3 is provided with a protruding ridge structure 6 for welding with the root of the blade and an anti-burn groove 4. The anti-burn groove 4 is located at the end of the welding groove 3 away from the center of the hub disc 2.

[0025] By opening an anti-burn groove 4 at the end of the welding groove 3, the anti-burn groove 4 corresponds to the edge position of the wind turbine blade. The anti-burn groove 4 prevents the edge position of the wind turbine blade from being welded to the hub disk 2, thereby avoiding the wind turbine blade from being burned, reducing the output of risky products, and improving the delivery quality of the cross-flow wind turbine blade.

[0026] In one or more embodiments, the welding groove 3 is an arc-shaped groove; the shape of the arc-shaped groove is adapted to the cross-sectional shape of the wind turbine blade, and multiple wind turbine blades are inserted into the hub disk 2 respectively, thereby ensuring the coaxiality of the wind turbine and the hub disk 2; when the ultrasonic welding machine is used, the blade is welded to the bottom of the welding groove, and the blade abuts against the convex rib structure 6, and is connected to the blade through the convex rib structure 6, thereby avoiding the blade being burned.

[0027] In an optional embodiment, the convex structure 6 includes an arc-shaped convex 61 along the arc-shaped groove and a transverse convex 62 perpendicular to the arc-shaped convex 61; the top of the arc-shaped convex 61 and the top of the transverse convex 62 are both located on the same plane, ensuring that the blade tip can simultaneously abut against the top of the arc-shaped convex 61 and the top of the transverse convex 62, thus avoiding incomplete welding and ensuring welding strength during welding.

[0028] In an optional embodiment, the arc-shaped protrusion 61 is spaced apart from the side wall of the welding groove 3; after the blade is inserted into the welding groove 3, the arc-shaped protrusion 61 is located in the middle of the blade welding surface. During ultrasonic welding, the middle of the blade is welded to the arc-shaped protrusion 61, thereby avoiding the blade edge from being burned and ensuring that the blade is firmly connected to the hub disc 2.

[0029] In an optional embodiment, the two ends of the transverse ridge 62 are respectively connected to the side wall of the connecting groove 5; the transverse ridge 62 serves as a reinforcement position for welding, so that the blade and the hub disk 2 are welded firmly, and the transverse ridge 62 is spaced along the direction of the arc ridge 61 on the arc ridge 61; while reducing blade burn, it ensures that the blade and the hub disk 2 are firmly welded.

[0030] In an optional embodiment, the cross-sectional area of ​​the arc-shaped protrusion 61 gradually increases from the top to the bottom; the cross-sectional area of ​​the transverse protrusion 62 gradually increases from the top to the bottom; specifically, the arc-shaped protrusion 61 is an arc-shaped triangular prism, and the transverse protrusion 62 is a triangular prism.

[0031] In an optional embodiment, the connecting groove 5 is an arc-shaped groove, and the welding groove 3 is located in the middle of the connecting groove 5; the connecting groove 5 is an arc-shaped groove, which facilitates the positioning of the blades of the wind turbine; and facilitates the positioning of the welding probe during ultrasonic welding.

[0032] In an optional embodiment, the edge of the connecting groove 5 to the edge of the welding groove 3 is an arc-shaped surface; the arc-shaped surface is used to guide the welding probe welding operation and reduce stress concentration on the blade.

[0033] In one or more embodiments, the outline of the anti-burn groove 4 coincides with the outline of the end of the welding groove 3. After the blade is embedded in the welding groove 3, the thinner part of the blade edge is suspended, thereby preventing the blade edge from being welded and thus preventing the blade from being burned.

[0034] In one or more embodiments, the hub disc 2 and the rib structure 6 are integrally molded structural parts made of polypropylene. The integral molding of the hub disc 2 and the rib structure 6 can ensure that the wind turbine and the hub disc 2 are firmly connected, and the polypropylene material is easy to weld to the blades.

[0035] Specifically, a steel axle 1 is installed in the middle of the wheel hub disc 2.

[0036] The use of anti-burn groove 4 solves the problem of blade root burn caused by ultrasonic welding. Furthermore, the anti-burn groove 4 is cut from the hub disc 2, which reduces the weight of the hub disc 2 and improves the production efficiency and product qualification rate of the cross-flow fan blade.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cross-flow fan blade steel shaft disc with a burn-proof structure, characterized in that, include: A hub disc (2) is provided with a plurality of connecting grooves (5), which are arranged in a ring on the hub disc (2). The connecting groove (5) is provided with a welding groove (3). The bottom of the welding groove (3) is provided with a convex ridge structure (6) for welding with the root of the blade and an anti-burn groove (4). The anti-burn groove (4) is located at one end of the welding groove (3) away from the center of the hub disc (2).

2. The cross-flow fan blade steel shaft disk with an anti-burn structure according to claim 1, characterized in that, The welding groove (3) is an arc-shaped groove.

3. The cross-flow fan blade steel shaft disk with an anti-burn structure according to claim 2, characterized in that, The convex structure (6) includes an arcuate convex rib (61) along the arcuate groove and a transverse convex rib (62) perpendicular to the arcuate convex rib (61).

4. The cross-flow fan blade steel shaft disk with an anti-burn structure according to claim 3, characterized in that, The arc-shaped protrusion (61) is spaced apart from the sidewall of the welding groove (3).

5. A cross-flow fan blade steel shaft disk with an anti-burn structure according to claim 3, characterized in that, The two ends of the transverse protrusion (62) are respectively connected to the sidewall of the connecting groove (5).

6. A cross-flow fan blade steel shaft disk with an anti-burn structure according to claim 3, characterized in that, From the top to the bottom of the arc-shaped convex rib (61), the cross-sectional area of ​​the arc-shaped convex rib (61) gradually increases; from the top to the bottom of the transverse convex rib (62), the cross-sectional area of ​​the transverse convex rib (62) gradually increases.

7. A cross-flow fan blade steel shaft disc with an anti-burn structure according to claim 2, characterized in that, The connecting groove (5) is an arc-shaped groove, and the welding groove (3) is located in the middle of the connecting groove (5).

8. A cross-flow fan blade steel shaft disc with an anti-burn structure according to claim 6, characterized in that, The edge of the connecting groove (5) to the edge of the welding groove (3) is an arc-shaped curved surface.

9. A cross-flow fan blade steel shaft disc with an anti-burn structure according to claim 1, characterized in that, The outline of the burn-proof groove (4) coincides with the outline of the end of the welding groove (3).

10. A cross-flow fan blade steel shaft disc with an anti-burn structure according to claim 1, characterized in that, The wheel hub disc (2) and the convex rib structure (6) are integrally molded structural parts made of polypropylene.

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