A hot-welded turbine blade and a welding jig

Abstract

The utility model discloses a kind of hot welding turbine fan blades and welding jigs. Including the first substrate made of material that can be hot welded, second substrate and deflector, the injection molding of the first substrate and deflector is integrated, the top surface of the deflector is provided with convex strip, the bottom end surface of the second substrate is provided with the recess corresponding with convex strip. The utility model is additionally provided with convex strip on deflector, and recess is additionally set up on second substrate, rely on convex strip and recess as the part of hot welding, without damaging the end surface of deflector and second substrate, guarantee the integrity of design structure;Meanwhile, rely on the plug of convex strip and recess when hot welding, can play the role of pre-positioning, improve the accuracy of installation, and the same recess can also collect melting product, avoid melting product exosmosis to the side surface of deflector.

Description

Technical Field

[0001] This utility model relates to the field of turbine blade technology, and in particular to a hot-welded turbine blade and welding fixture. Background Technology

[0002] A turbo fan, also known as a centrifugal fan, is a fan device where the gas flow is perpendicular to the rotating shaft (in contrast to axial fans where the gas flow is parallel to the shaft). It is commonly used in enclosed room ventilation, duct ventilation, and computer cooling. It uses a motor to drive the fan blades to rotate, generating centrifugal force that converts kinetic energy into pressure energy as the gas passes through a vortex-shaped casing, achieving continuous exhaust. The turbine blades are the components that act as fan blades in a turbo fan; they are the components that generate airflow through rotation. They are mainly composed of a base plate with multiple curved guide vanes on it; the airflow generated by rotation is achieved through these curved guide vanes.

[0003] Currently, turbine blades are typically manufactured using injection molding, where the base plate and the curved guide vane are integrally injection molded. However, this structure only meets the requirements of small turbine fans. When designing large or high-powered turbine fans, the curved guide vane is only connected to the base plate at one end, while the other end is suspended, leading to end deformation during operation and affecting airflow. Solving this problem is simple: add another base plate to the other end of the curved guide vane to prevent deformation. However, this design cannot be achieved through injection molding. Currently, the common manufacturing method for such turbine blades is to first integrally injection mold a base plate with the curved guide vane, and then thermally weld another base plate to the top of the curved guide vane, essentially fusion-bonding the end of the curved guide vane before inserting it onto the base plate. However, during hot welding, it is found that the arc-shaped flow guide plate and the substrate are connected face to face. When welding with the substrate, on the one hand, because the end face of the substrate and the flow guide plate is melted, it is easy to change the thickness or end face shape of the original structure, resulting in tolerance values ​​between the product and the original design. In fact, after hot welding, it may even deviate from the original design structure and become a defective product. On the other hand, the melted material after hot welding is easy to seep out to the side, which greatly affects the aesthetics and may even affect the airflow.

[0004] Therefore, it is necessary to optimize the existing turbine blade structure and welding fixture. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a hot-welded turbine blade and a welding fixture.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A heat-welded turbine blade includes a first substrate, a second substrate, and a guide plate made of a heat-welding material. The first substrate and the guide plate are injection molded as one piece. The top surface of the guide plate is provided with a protrusion, and the bottom surface of the second substrate is provided with a groove corresponding to the protrusion.

[0008] Preferably, the edges at both ends of the convex strip are provided with chamfered surfaces.

[0009] Preferably, the inner wall of the groove is provided with a slope surface corresponding to the chamfered surface.

[0010] Preferably, the groove has an annular opening at the groove opening.

[0011] A welding fixture for hot welding turbine blades includes an upper mold and a lower mold made of a heat-conducting material. Both the upper mold and the lower mold are provided with receiving blocks whose positions and numbers correspond to those of a guide plate. The top of the receiving block of the upper mold is provided with a hot melt groove corresponding to a protrusion, and the top of the receiving block of the lower mold is provided with a hot melt protrusion corresponding to a groove.

[0012] By adopting the above solution, this utility model provides additional protrusions on the guide plate and additional grooves on the second substrate. The protrusions and grooves serve as the hot welding points, without damaging the end faces of the guide plate and the second substrate, thus ensuring the integrity of the design structure. At the same time, the interlocking of the protrusions and grooves during hot welding can play a role in pre-positioning, improving the accuracy of assembly. Similarly, the grooves can also collect molten material, preventing it from seeping onto the side of the guide plate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the hot-welded turbine blade according to an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure after the hot-welded turbine blades are separated according to an embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the protruding strip in an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the groove structure according to an embodiment of the present invention.

[0017] Figure 5 This is a schematic diagram of the welding fixture according to an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] like Figures 1 to 5 As shown, this embodiment provides a heat-welded turbine blade, including a first substrate 1, a second substrate 2, and a guide plate 3 made of a heat-welding material, such as plastic, which is a material that can be heat-melted and bonded. The first substrate 1 and the guide plate 3 are injection molded as one piece. The top surface of the guide plate 3 is provided with a protrusion 4, and the bottom surface of the second substrate 2 is provided with a groove 5 corresponding to the protrusion 4.

[0022] The main design of this embodiment is to additionally set a protrusion 4 on the flow guide plate 3 and additionally set a groove 5 on the second substrate 2. The protrusion 4 and groove 5 are used as the parts for hot welding. That is, only the protrusion 4 and groove 5 are heated without damaging the end faces of the flow guide plate 3 and the second substrate 2, thus ensuring the integrity of the design structure. At the same time, the interlocking of the protrusion 4 and groove 5 during hot welding can play a role in pre-positioning and improve the accuracy of assembly. Similarly, the groove 5 can also collect molten material and prevent molten material from seeping to the side of the flow guide plate 3.

[0023] Furthermore, in this embodiment, to better facilitate the interlocking of the protrusion 4 and the groove 5, chamfered surfaces 6 are provided at both ends of the protrusion 4. Correspondingly, the inner wall of the groove 5 is provided with a sloped surface 7 corresponding to the chamfered surface 6. This provides a certain guiding effect during hot welding. It should be noted that although hot welding will melt part of the structure of the protrusion 4, the overall hot melting also occurs synchronously along the surface of the protrusion 4, so that the chamfered surface 6 remains after hot melting.

[0024] Furthermore, in order to better collect the melted material, the groove 5 in this embodiment is provided with an annular opening 8 at the groove opening. This annular opening 8 can collect the melted material that still overflows after the protrusion 4 and the groove 5 are inserted.

[0025] This embodiment provides a welding fixture for hot welding turbine blades, specifically including an upper mold 101 and a lower mold 102 made of thermally conductive material. Both the upper mold 101 and the lower mold 102 are provided with receiving blocks 103 whose positions and numbers correspond to the guide plate 3. The top of the receiving block 103 of the upper mold 101 is provided with a hot melt groove 104 corresponding to the protrusion 4, and the top of the receiving block 103 of the lower mold 102 is provided with a hot melt protrusion 105 corresponding to the groove 5.

[0026] When performing hot welding, first heat the upper mold 101 and the lower mold 102 to a suitable temperature, then place the protrusion 4 in the hot melt groove 104, and align the groove 5 with the hot melt protrusion 105. After the protrusion 4 and the groove 5 are both heated to a suitable degree, the protrusion 4 and the groove 5 can be inserted into each other and pressure applied appropriately to complete the hot welding.

[0027] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A hot-welded turbine blade, characterized in that: It includes a first substrate, a second substrate, and a flow guide plate made of a material that can be thermally welded. The first substrate and the flow guide plate are injection molded as one piece. The top surface of the flow guide plate is provided with a protrusion, and the bottom surface of the second substrate is provided with a groove corresponding to the protrusion.

2. The hot-welded turbine blade as described in claim 1, characterized in that: The edges at both ends of the convex strip are chamfered.

3. The hot-welded turbine blade as described in claim 2, characterized in that: The inner wall of the groove is provided with a slope surface corresponding to the chamfered surface.

4. The hot-welded turbine blade as described in claim 3, characterized in that: The groove has an annular opening at the groove opening.

5. A welding fixture for hot welding turbine blades as described in any one of claims 1-4, characterized in that: The device includes an upper mold and a lower mold made of thermally conductive material. Both the upper mold and the lower mold are provided with receiving blocks whose positions and numbers correspond to the guide plate. The top of the receiving block of the upper mold is provided with a hot melt groove corresponding to the protrusion, and the top of the receiving block of the lower mold is provided with a hot melt protrusion corresponding to the groove.

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