A stress-reducing axial blade

Abstract

A stress-reducing axial vane, characterized in that it comprises a vane housing, a connecting part and a mounting head, wherein the vane housing, the connecting part and the mounting head are arranged one after the other, the connecting part is arranged between the vane housing and the mounting head and is connected to each of them, concave holes are provided at both ends of the mounting head, the concave holes are arc-shaped and an arc-shaped surface of the hole extends to the mounting head, inclined surfaces are provided on both sides of the connecting part, one end of the inclined surface extends to the side surface of the mounting head and the other end extends to the side surface of the vane housing, and the thickness of the connecting part decreases from the center of the mounting head to both sides.

Description

Technical area

[0001] The present utility model belongs to the technical field of fans and relates in particular to a stress-reducing axial blade. State of the art

[0002] Segmented fan blades consist of a mounting head and an integral blade housing formed on the mounting head. During operation, such segmented fan blades are subject to significant stress due to the connection between the mounting head and the blade housing. During rotation, excessive stress is generated, which can easily lead to blade damage. Therefore, the limiting speed of such blades is not high, and after prolonged operation, the connection can easily break, posing a safety hazard. Content of the utility model

[0003] The aim of the present utility model is to provide a stress-reducing axial blade to solve the technical problems occurring in the prior art due to significant stresses at the connection between the mounting head and the blade housing, which easily leads to damage to the blade during rotation, low limit speed, breakage of the connection and safety risks.

[0004] To achieve this object, the embodiment of the present utility model provides a stress-reducing axial vane comprising a vane housing, a connecting part, and a mounting head, wherein the vane housing, the connecting part, and the mounting head are arranged one after the other, the connecting part is arranged between the vane housing and the mounting head and is connected to each of them, concave holes are provided at both ends of the mounting head, the concave holes are arc-shaped, and an arc-shaped surface of the hole extends to the mounting head, inclined surfaces are provided on both sides of the connecting part, one end of the inclined surface extends to the side surface of the mounting head and the other end extends to the side surface of the vane housing, and the thickness of the connecting part decreases from the center of the mounting head to both sides.

[0005] In an optional embodiment of the present utility model, the side surface of the blade housing is curved.

[0006] In an optional embodiment of the present utility model, the end of the connecting part facing the blade housing is curved.

[0007] In an optional embodiment of the present utility model, the mounting head comprises a mounting body and a projection ring, wherein the mounting body is fixedly connected to the blade housing and the projection ring, the width of the projection ring is greater than that of the mounting body, and both the mounting body and the projection ring are cylindrical.

[0008] In an optional embodiment of the present utility model, the concave bore has a length of 2 to 50 mm, a width of 5 to 80 mm and a depth of 5 to 100 mm.

[0009] In an optional embodiment of the present utility model, a limiting projection is fixedly attached to the outer side of the projection ring, wherein the limiting projection is polygonal in shape.

[0010] This embodiment of the utility model offers at least one of the following technical effects through one or more of the above-described technical solutions of the stress-reducing axial blade: The stress-reducing axial vane proposed in this application has the following effects: 1. Stress distribution: The concave bore facilitates the even transmission and distribution of load on the blade stem. This concave design more effectively distributes material stress during operation, avoiding stress concentrations and reducing stress as much as possible, thereby increasing the strength and maximum limiting speed of the blade and reducing fatigue and failures. 2. Weight reduction: The concave cut concave bore also contributes to the weight reduction of the entire blade, which reduces the inertial forces and increases the operating efficiency of the fan. 3. Aesthetics and functionality: The concave hole can also be chosen for aesthetic reasons. Figures

[0011] To clarify the technical solutions of the embodiments of the present utility model, some of the drawings used in the description or the prior art are briefly described below. Obviously, the following drawings show only some of the embodiments of the present utility model. Those skilled in the art can obtain further illustrations based on these drawings without any creative effort. Fig. 1: Structural diagram of a stress-reducing axial vane blade according to an embodiment of the present utility model. Fig. 2: Structural diagram of a stress-reducing axial vane blade according to an embodiment of the present utility model. Fig. 3: Structural diagram of a stress-reducing axial vane blade according to an embodiment of the present utility model. Drawing legend:

[0012] 1. Blade housing; 2. Connecting part; 3. Mounting head; 4. Limiting projection; 5. Hub; 21. Concave bore; 31. Mounting body; 32. Lead ring. Embodiments

[0013] The exemplary embodiments of the present utility model are described in detail below. The exemplary embodiments are illustrated in the accompanying drawings, wherein identical or similar reference numerals designate identical or similar elements or elements with identical or similar functions. The exemplary embodiments described with reference to the drawings serve merely to illustrate the invention and should not be understood as limiting the embodiment of the present utility model.

[0014] In the description of the embodiments of the present utility model, it should be understood that terms such as "length," "width," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," etc., indicate directional or positional relationships according to the relationships shown in the drawings and are used only to simplify the description of the embodiments. However, they do not specify or imply that the devices or elements in question must have a particular orientation or be constructed or operated in a particular direction. Therefore, they should not be construed as limiting the present utility model.

[0015] Furthermore, the terms "first" and "second" are for differentiation purposes only and do not indicate the relative importance or a specific number of the technical features mentioned. The features designated "first" or "second" may explicitly or implicitly include one or more of these features. For the purposes of the description of the present utility model, the term "several" means two or more, unless expressly stated otherwise.

[0016] In the embodiments of the present utility model, terms such as "assembly," "connection," "attachment," "attachment," and "fixation," unless otherwise specified or defined, are to be interpreted broadly. This may be a fixed connection, a detachable connection, or a one-piece design; it may be a mechanical or electrical connection; it may be a direct connection or an indirect connection via an intermediate element, as well as internal communication or interaction between two elements. Those skilled in the art can understand the precise meaning of the above terms in the context of the embodiments depending on the situation.

[0017] In an embodiment of the present utility model, as shown in the Fig.1 to 3, a stress-relieving axial flow blade is provided, which comprises a blade housing 1, a connecting part 2, and a mounting head 3. The blade housing 1, the connecting part 2, and the mounting head 3 are arranged in this order, with the connecting part 2 being arranged between the blade housing 1 and the mounting head 3 and fixedly connected to each of them. At both ends of the mounting head 3, a concave hole 21 is provided, which is designed in an arc shape and whose arcuate surface extends to the mounting head 3. The concave hole 21 serves to relieve stress, thereby reducing stress and increasing the service life of the blade according to this application. Inclined surfaces are formed on both sides of the connecting part 2, one end of the inclined surface extending to the side surface of the mounting head 3 and the other end extending to the side surface of the blade housing 1.The thickness of the connecting part 2 gradually decreases from the center of the mounting head 3 to both sides, making the structure of the mounting head 3 and the connecting part 2 more stable and the connection stronger. The stress-reducing axial fan blade proposed in this application has the following effects: 1. Stress distribution: The concavely cut concave hole 21 facilitates the uniform transmission and distribution of the load on the blade stem. This concave design more advantageously distributes the material stress during operation to avoid stress concentration and reduce stress as much as possible, thereby increasing the strength and maximum limiting speed of the blade and reducing fatigue and failures. 2. Weight reduction: The concavely cut concave hole 21 also contributes to the weight reduction of the entire blade, which reduces inertial forces and increases the operating efficiency of the fan.Aesthetics and functionality: The concave hole 21 can also be chosen for aesthetic reasons.

[0018] In a further embodiment of the present utility model, the side surface of the blade housing 1 is curved, which increases the lateral contact area with the air and thus increases the air volume.

[0019] In a further embodiment of the present utility model, the end of the connecting part 2 facing the blade housing 1 is curved.

[0020] In a further embodiment of the present utility model, the mounting head 3 comprises a mounting body 31 and a projection ring 32. The mounting body 31 is fixedly connected to the blade housing 1 and the projection ring 32, respectively. The width of the projection ring 32 is greater than that of the mounting body 31, and both the mounting body 31 and the projection ring 32 are cylindrical.

[0021] In a further embodiment of the present utility model, the length of the concave bore 21 is 2 to 50 mm, preferably 30 mm, the width is 5 to 80 mm, preferably 50 mm, and the depth is 5 to 100 mm, preferably 30 mm. The concave bore 21 serves to relieve stress, preventing stress concentrations in the blade housing 1 and thus fractures, thereby increasing the service life of the blade housing 1.

[0022] In a further embodiment of the present utility model, a limiting projection 4 which is polygonal in shape is fixedly attached to the outside of the projection ring 32.

[0023] The stress-reducing axial blade proposed in this application is firmly attached to the hub 5 of the fan via the mounting head 3.

[0024] The stress-reducing axial-flow blade proposed in this application has the following effects: 1. Stress distribution: The concavely cut concave hole 21 facilitates the uniform transmission and distribution of load on the blade stem. This concave design more advantageously distributes the material stress during operation to avoid stress concentration and reduce stress as much as possible, thereby increasing the strength and maximum limiting speed of the blade and reducing fatigue and failures. 2. Weight reduction: The concavely cut concave hole 21 also contributes to the weight reduction of the entire blade, which reduces inertial forces and increases the operating efficiency of the fan. 3. Aesthetics and functionality: The concave hole 21 can also be chosen for aesthetic reasons.

[0025] The embodiments described above represent only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacement parts, and improvements made within the spirit and principles of the present utility model are also within the scope of the present utility model.

Claims

[1] A stress-reducing axial vane blade, characterized by that it comprises a blade housing, a connecting part and a mounting head, wherein the blade housing, the connecting part and the mounting head are arranged one after the other, the connecting part is arranged between the blade housing and the mounting head and is connected to each of them, concave holes are provided at both ends of the mounting head, the concave holes are arc-shaped and an arc-shaped surface of the hole extends to the mounting head, inclined surfaces are provided on both sides of the connecting part, one end of the inclined surface extends to the side surface of the mounting head and the other end to the side surface of the blade housing and the thickness of the connecting part decreases from the center of the mounting head to both sides. [2] A stress-reducing axial vane blade according to claim 1, characterized bythat the side surface of the blade housing is curved. [3] A stress-reducing axial vane blade according to claim 1, characterized by that the end of the connecting part facing the blade housing is curved. [4] A stress-reducing axial vane according to claim 1, characterized by that the mounting head comprises a mounting body and a projection ring, wherein the mounting body is fixedly connected to the blade housing and the projection ring, the width of the projection ring is greater than that of the mounting body and both the mounting body and the projection ring are cylindrical. [5] A stress-reducing axial vane according to claim 1, characterized by that the concave hole has a length of 2 to 50 mm, a width of 5 to 80 mm and a depth of 5 to 100 mm. [6] A stress-reducing axial vane according to claim 4, characterized bythat a limiting projection is fixedly attached to the outside of the projection ring, wherein the limiting projection is polygonal in shape.

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