Cross-flow fan with hyperbolic blades

Abstract

The utility model provides a hyperbolic curve blade cross-flow fan blade, which relates to the technical field of cross-flow fan blades, and comprises a fan blade body, one side of the fan blade body is fixedly provided with a first connecting part, the other side of the fan blade body is fixedly provided with a second connecting part, the surface of the first connecting part is provided with an annular caulking groove, and the surface of the second connecting part is provided with a second caulking groove. And a positioning groove is formed in the inner side of the first connecting part. According to the hyperbolic-curve-shaped fan blade, the hyperbolic-curve-shaped design is adopted for the fan blade body, airflow streamlines can be effectively optimized, air can flow in the fan blade more smoothly, the airflow separation and turbulence phenomena are reduced, the air flowing resistance is remarkably reduced, and the aerodynamic efficiency of ventilation equipment is improved; the fan blades are convenient to assemble and disassemble, the installation efficiency is improved, the installation difficulty and cost are reduced, maintenance and replacement of the fan blades are facilitated to a certain extent, and the maintainability of equipment is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to cross-flow fan blade technical field especially relates to a hyperbolic blade cross-flow fan blade. BACKGROUND

[0002] The cross-flow fan blade is mainly applied to split air conditioner, automobile air conditioner and warm air blower, has the characteristics such as wear resistance, high temperature resistance and corrosion resistance, and is the main component of the cross-flow fan blade balance machine. The cross-flow fan blade is widely used in the split indoor unit of the wall-mounted air conditioner, and its working characteristics include: when the impeller makes stable rotary motion, the gas exists twice flow in and out of the blade row, the relative velocity of the gas when entering and exiting the blade row for the first time is in deceleration, the relative velocity of the gas when entering and exiting the blade row for the second time is in acceleration, and the absolute velocity of the gas is in acceleration during the whole movement process. The first entering and exiting of the blade row is called the air inlet area, and the second entering and exiting of the blade row is called the air outlet area. Therefore, the blade row can be divided into the air inlet blade row and the air outlet blade row according to the similar area.

[0003] In the prior art, for example, the cross-flow fan blade with patent No. CN220337129U includes a middle plate and a blade arranged in a ring shape on one side of the middle plate. A blade groove is arranged in a ring shape on the other side of the middle plate corresponding to the position of the blade. A plug-in connector is arranged at one end of the blade corresponding to the blade groove. The plug-in connector is inserted into the blade groove of another cross-flow fan blade. A recessed wave tooth part is arranged on the blade groove. A wave tooth tip part is arranged on the plug-in connector. The surface of the wave tooth tip part and the surface of the recessed wave tooth part are in contact with each other when the middle plate is matched with the product. The wave tooth line of the wave tooth tip part is melted by the rapid vibration of the ultrasonic welding machine. The sol directly enters the recessed wave tooth part. The product is connected by rapid cooling. The strength of the product can be improved. The overall strength of the product can be improved. The torsional and compressive resistance of the product can be strengthened. The welding strength of the product can be strengthened. The product is not easy to be welded out of position and to be virtual welded.

[0004] Although the cross-flow fan blade has the effect of not being easy to be welded out of position and to be virtual welded, the shape of the blade of the product is mainly composed of a simple circular arc or a straight line segment. In the air flow process, the blade cannot well adapt to the change of the streamline of the airflow. Therefore, a large resistance and turbulence are generated when the airflow flows in the fan blade. The aerodynamic efficiency of the ventilation equipment is affected. Moreover, the cross-flow fan blade is an integral whole and cannot be disassembled. Therefore, different lengths of the air duct need to be matched with different lengths of the cross-flow fan blade. The use is not convenient. Improvement is needed. UTILITY MODEL CONTENTS

[0005] The purpose of this invention is to solve the problems in the existing technology where the blade shape is mostly composed of simple arcs or straight lines, which cannot adapt well to the changes in airflow streamlines, and the cross-flow fan blade is a non-detachable whole, which requires different lengths of cross-flow fan blades to match different lengths of air ducts. Therefore, a hyperbolic blade cross-flow fan blade is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hyperbolic blade cross-flow fan blade, comprising a fan blade body, a first connecting part fixedly installed on one side of the fan blade body, and a second connecting part fixedly installed on the other side of the fan blade body. The surface of the first connecting part is provided with an annular groove, the inner side of the first connecting part is provided with a positioning groove, and the surface of the first connecting part is provided with a connecting groove. An annular insert is fixedly installed on the surface of the second connecting part, and a positioning block is fixedly installed on the inner side of the annular insert. A connecting block is slidably connected inside the second connecting part, a guide rod is fixedly installed inside the second connecting part, and a tension spring is fixedly connected to the inner side of the second connecting part. A limit groove is provided on the side of the connecting block, and a tension spring is provided inside the first connecting part, with one end of the tension spring fixedly connected to the limit block.

[0007] Preferably, the fan blade body is hyperbolic in shape, with a curvature of 0.1-0.3 at the inlet and 0.4-0.6 at the outlet.

[0008] Preferably, the annular insert and the annular groove are fitted together, and the positioning block and the positioning groove are engaged together.

[0009] Preferably, the connecting block and the guide rod are slidably connected, and the tension spring is fixedly connected to the side of the connecting block.

[0010] Preferably, the connecting block and the connecting groove are slidably connected, the limiting block and the limiting groove are slidably connected, and the limiting block and the first connecting part are slidably connected.

[0011] Preferably, the fan blade body has reinforcing ribs inside.

[0012] Preferably, the reinforcing ribs have a mesh-like structure.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. The utility model discloses a fan blade body adopts hyperbolic shape design, can effectively optimize airflow streamline, make the air flow in the fan blade more smooth, reduce airflow separation and turbulence phenomenon, significantly reduce the air flow resistance, improve the aerodynamic efficiency of ventilation equipment, and through the connecting structure of first connecting portion and second connecting portion, the assembly and disassembly of fan blade are convenient, improve the installation efficiency, reduce the installation difficulty and cost, and to a certain extent, it is favorable to the maintenance and replacement of fan blade, enhance the maintainability of equipment.

[0015] 2. The utility model discloses a fan blade body inside is equipped with grid reinforcing rib, greatly enhanced the structural strength of fan blade, make it can bear greater centrifugal force and air pressure, not easy to deform or damage when high -speed rotation, prolong the service life of fan blade, reduce the maintenance and replacement cost of equipment, especially suitable for long -time high -load operation's ventilation equipment. DRAWINGS

[0016] Figure 1 A hyperbolic blade tubular fan blade three-dimensional structure schematic diagram is provided for the utility model;

[0017] Figure 2 A fan blade body, first connecting portion and second connecting portion schematic diagram of hyperbolic blade tubular fan blade are provided for the utility model Figure 1 ;

[0018] Figure 3 A fan blade body, first connecting portion and second connecting portion schematic diagram of hyperbolic blade tubular fan blade are provided for the utility model Figure 2 ;

[0019] Figure 4 A hyperbolic blade tubular fan blade side sectional view is provided for the utility model;

[0020] Figure 5 A fan blade body sectional view of hyperbolic blade tubular fan blade is provided for the utility model

[0021] Legend: 1, fan blade body;2, first connecting portion;3, second connecting portion;4, annular embedding groove;5, positioning groove;6, connecting groove;7, annular embedding block;8, positioning block;9, connecting block;10, guide rod;11, tension spring;12, limit groove;13, tension spring;14, limit block;15, reinforcing rib. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above -mentioned purpose, feature and advantage of the utility model, the utility model is further explained below with the help of drawings and examples. It needs to be explained that the embodiment of the application and the feature in the embodiment can be combined mutually in the case of no conflict.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Example 1: As Figures 1-5 As shown, this utility model provides a technical solution: a hyperbolic blade cross-flow fan blade, including a fan blade body 1, a first connecting part 2 fixedly installed on one side of the fan blade body 1, and a second connecting part 3 fixedly installed on the other side of the fan blade body 1. An annular groove 4 is formed on the surface of the first connecting part 2, a positioning groove 5 is formed on the inner side of the first connecting part 2, and a connecting groove 6 is formed on the surface of the first connecting part 2. An annular insert 7 is fixedly installed on the surface of the second connecting part 3, a positioning block 8 is fixedly installed on the inner side of the annular insert 7, a connecting block 9 is slidably connected inside the second connecting part 3, a guide rod 10 is fixedly installed inside the second connecting part 3, and a tension spring 11 is fixedly connected to the inner side of the second connecting part 3. A limiting groove 12 is provided on the side of the connecting block 9. A tension spring 13 is provided inside the first connecting part 2. One end of the tension spring 13 is fixedly connected to the limiting block 14. The fan blade body 1 is in the shape of a hyperbola. The curvature of the fan blade body 1 at the inlet is 0.1-0.3, and the curvature of the fan blade body 1 at the outlet is 0.4-0.6. The annular insert 7 is fitted and connected to the annular groove 4. The positioning block 8 is engaged and connected to the positioning groove 5. The connecting block 9 is slidably connected to the guide rod 10. The tension spring 11 is fixedly connected to the side of the connecting block 9. The connecting block 9 is slidably connected to the connecting groove 6. The limiting block 14 is slidably connected to the limiting groove 12. The limiting block 14 is slidably connected to the first connecting part 2.

[0025] In this embodiment, the hyperbolic shape design of the fan blade body 1 effectively optimizes the airflow streamline, making the air flow more smoothly within the fan blade, reducing airflow separation and turbulence, significantly reducing airflow resistance, and improving the aerodynamic efficiency of the ventilation equipment. Furthermore, the connection structure between the first connecting part 2 and the second connecting part 3 facilitates the assembly and disassembly of the fan blade, improving installation efficiency, reducing installation difficulty and cost, and to a certain extent, facilitating the maintenance and replacement of the fan blade, thus enhancing the maintainability of the equipment.

[0026] Example 2: As Figures 1-5 As shown, the inside of the blade body 1 is provided with reinforcing ribs 15, which have a grid-like structure.

[0027] In the embodiment, the grid-shaped reinforcing ribs 15 arranged in the fan blade body 1 greatly enhance the structural strength of the fan blade, so that the fan blade can withstand greater centrifugal force and air pressure, is not easy to deform or damage during high-speed rotation, prolongs the service life of the fan blade, reduces the maintenance and replacement cost of the equipment, and is especially suitable for ventilation equipment operating for a long time under high load.

[0028] The working principle of the embodiment is as follows: when the hyperbolic blade cross-flow fan blade works, air flows into the fan blade body 1 from the inlet, and because the fan blade body 1 is in a hyperbolic shape and the curve rate at the inlet is 0.1-0.3, the air flow is guided to enter smoothly, and as the air flows in the fan blade, the hyperbolic profile enables the air flow to smoothly move along the blade surface, reduces separation and turbulence, and is efficiently discharged at the outlet due to the outlet curve rate of 0.4-0.6, thereby reducing flow resistance and improving aerodynamic efficiency. When the fan blades are assembled, the second connecting part 3 of one fan blade is first butted against the first connecting part 2 of another fan blade, the annular embedding block 7 of the second connecting part 3 is embedded into the annular embedding groove 4 of the first connecting part 2, and the positioning block 8 is clamped into the positioning groove 5 to complete preliminary positioning and fixation. Then, the connecting block 9 connected with the guide rod 10 in sliding connection in the second connecting part 3 is pulled, and the tension spring 11 connected therewith is stretched. After the connecting block 9 slides away from the connecting groove 6, the fan blade is pushed to align the connecting groove 6 with the connecting block 9, the connecting block 9 is loosened, the tension spring 11 makes the connecting block 9 slide into the connecting groove 6, at this time, the limiting block 14 in the first connecting part 2 is pushed by the tension spring 13 to slide into the limiting groove 12 of the connecting block 9, and connection locking is realized. The grid-shaped reinforcing ribs 15 in the fan blade body 1 are integrally formed with the fan blade by a specific process, and when the fan blade rotates at high speed to withstand centrifugal force and air pressure, the grid-shaped structure uniformly disperses stress according to the design difference of different regions, ensures the stability of the fan blade structure, prevents deformation and damage, prolongs the service life, and reduces the maintenance cost.

[0029] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A double-curved vane cross-flow fan blade comprising a fan blade body (1), characterized in that: The side of the fan blade body (1) is fixedly installed with a first connecting part (2), the other side of the fan blade body (1) is fixedly installed with a second connecting part (3), the surface of the first connecting part (2) is provided with an annular embedding groove (4), the inner side of the first connecting part (2) is provided with a positioning groove (5), the surface of the first connecting part (2) is provided with a connecting groove (6), the surface of the second connecting part (3) is fixedly installed with an annular embedding block (7), the inner side of the annular embedding block (7) is fixedly installed with a positioning block (8), the inside of the second connecting part (3) is slidably connected with a connecting block (9), the inside of the second connecting part (3) is fixedly installed with a guide rod (10), the inner side of the second connecting part (3) is fixedly connected with a tension spring (11), the side of the connecting block (9) is provided with a limiting groove (12), the inside of the first connecting part (2) is provided with a tension spring (13), one end of the tension spring (13) is fixedly connected with a limiting block (14).

2. The double-curved vane-type through-flow fan blade according to claim 1, characterized by: The fan blade body (1) is in a hyperbolic shape, the curve rate of the inlet of the fan blade body (1) is 0.1-0.3, and the curve rate of the outlet of the fan blade body (1) is 0.4-0.

6.

3. The double-curved vane-type through-flow fan blade according to claim 1, characterized by: The annular embedding block (7) and the annular embedding groove (4) are embeddedly connected, and the positioning block (8) and the positioning groove (5) are clampedly connected.

4. The double-curved vane-type through-flow fan blade according to claim 1, characterized by: The connecting block (9) and the guide rod (10) are slidably connected, and the tension spring (11) and the side of the connecting block (9) are fixedly connected.

5. The double-curved vane-type through-flow fan blade according to claim 1, characterized by: The connecting block (9) and the connecting groove (6) are slidably connected, the limiting block (14) and the limiting groove (12) are slidably connected, and the limiting block (14) and the first connecting part (2) are slidably connected.

6. The double-curved vane-type through-flow fan blade according to claim 1, characterized by: The inside of the fan blade body (1) is provided with a reinforcing rib (15).

7. The double-curved vane-type through-flow fan blade according to claim 6, characterized by: The reinforcing rib (15) is in a grid structure.

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