A ventilator impeller with drainage holes

Abstract

The utility model belongs to ventilator component improvement technical field relates to a ventilator impeller with drainage hole, including ventilator impeller, airfoil blade, condensate water drainage component and drainage hole, install several airfoil blades in ventilator impeller, several airfoil blades are annularly arranged with the axis of ventilator impeller as the center, be equipped with condensate water drainage component in airfoil blade inner chamber, open several drainage holes on the leeward surface of airfoil blade, condensate water drainage component is connected with drainage hole. The utility model discloses through the synergetic effect of drainage hole and condensate water drainage component, forms complete and efficient drainage system, orderly leads to the specified drainage position with condensate water, ensures that condensate water can smoothly discharge airfoil blade inner chamber, avoids the disorder and reflux of water flow in airfoil blade inside, reduces the trouble repair rate, ensures that fan will not vibrate because of waterlogging, guarantees fan stable operation.

Description

Technical Field

[0001] This utility model relates to the field of ventilation component improvement technology, and in particular to a ventilation impeller with drainage holes. Background Technology

[0002] In practical applications of ventilation equipment, some gaseous media have a high water content (such as humid air, process exhaust gas, or wet gas in specific industrial environments). When the operating temperature is lower than the dew point temperature of the gaseous media, the water vapor in the gas will condense on the windward side of the blades in the fan impeller and adhere to the surface of the metal parts. Under the pressure generated by the operation of the fan, it will flow along the metal surface.

[0003] For ventilators using airfoil impeller designs, airfoil blades typically mimic the streamlined structure of aircraft wings, featuring hollow internal cavities to optimize aerodynamic performance. These blades are generally formed by welding together multiple steel plates, resulting in a large number of densely distributed welds. However, due to limitations in welding processes (such as insufficient weld filling, welding deformation, or local lack of fusion), the weld area often contains tiny gaps or microscopic defects. When condensate flows along the blade surface to the weld location, moisture can easily seep into the hollow cavity of the blade through these gaps on the windward side of the blade.

[0004] The hollow cavity of an airfoil impeller is usually not designed with drainage requirements in mind. Water seeps in and gradually accumulates in the cavity, forming water accumulation. This water accumulation will disrupt the dynamic balance of the impeller, causing the fan to vibrate. Severe vibration can damage the fan equipment and affect production. Utility Model Content

[0005] To solve the above-mentioned existing technical problems, this utility model provides a fan impeller with drainage holes.

[0006] The technical solution of this utility model is achieved through the following scheme: a fan impeller with drainage holes, including a fan impeller, airfoil blades, a condensate drainage assembly and drainage holes, wherein a plurality of airfoil blades are installed inside the fan impeller, the plurality of airfoil blades are arranged in a ring around the axis of the fan impeller, a condensate drainage assembly is provided in the inner cavity of the airfoil blades, and a plurality of drainage holes are opened on the leeward side of the airfoil blades, and the condensate drainage assembly is connected to the drainage holes.

[0007] Through the above technical solutions, a complete and efficient drainage system is formed by the synergistic action of the drain holes and condensate drainage components. This system guides the condensate to the designated drainage location in an orderly manner, ensuring that the condensate can be smoothly discharged from the airfoil blade cavity. This avoids turbulence and backflow of water inside the airfoil blade, reduces the failure and maintenance rate, and ensures that the fan will not vibrate due to water accumulation, thus guaranteeing the stable operation of the fan.

[0008] Preferably, the airfoil blade includes an upper wing fan and a lower wing fan, which are welded together. A condensate drainage assembly is installed on the inner arc surface of the upper wing fan, and several drainage holes are provided on the lower wing fan.

[0009] Through the above technical solutions, the special shape of the inner arc surface of the lower blade fan combined with the condensate drainage component is conducive to guiding the flow of condensate and avoiding backflow of condensate due to excessive flow speed caused by the rapid rotation of the impeller.

[0010] Preferably, the condensate drainage assembly includes a guide plate, a drainage arc plate, and a flow-blocking plate, wherein the drainage arc plate is located between the guide plate and the flow-blocking plate, and the guide plate, the drainage arc plate, and the flow-blocking plate are all disposed on the inner wall of the windward side of the airfoil blade.

[0011] Preferably, the guide plate, the diversion arc plate, and the flow-blocking plate are integrally constructed.

[0012] Preferably, the guide vane is located at the head of the inner wall of the airfoil's windward side, and the deflector is located at the tail of the inner wall of the airfoil's windward side, with the deflector abutting against the leeward side of the airfoil.

[0013] Preferably, the flow-blocking plate is arc-shaped and connected to the drain hole.

[0014] Through the above technical solutions, the guide vane, with its straight plate shape and tilt angle, guides the condensate into the flow channel formed by the subsequent guide arc plate and the inner arc surface of the lower wing fan. The arc-shaped protruding structure of the guide arc plate can effectively reduce the resistance during the rapid flow of condensate and disperse the impact force of condensate, avoiding turbulence of condensate in the inner cavity of the airfoil blade; the arc-shaped baffle plate allows the condensate to flow naturally along the arc surface to the drain hole after reaching the baffle plate, reducing condensate backflow.

[0015] In summary, this utility model has the following beneficial effects: 1. This utility model forms a complete and efficient drainage system through the synergistic action of the drain hole and the condensate drainage component. It guides the condensate to the designated drainage position in an orderly manner, ensuring that the condensate can be smoothly discharged from the inner cavity of the airfoil blade. This avoids the turbulence and backflow of water inside the airfoil blade, reduces the failure and maintenance rate, ensures that the fan will not vibrate due to water accumulation, and guarantees the stable operation of the fan.

[0016] 2. The special shape of the inner arc surface of the lower blade fan, combined with the condensate drainage component, facilitates the flow of condensate and prevents backflow caused by excessive flow speed due to the rapid rotation of the impeller.

[0017] 3. The guide vane, with its straight plate shape and tilt angle, guides the condensate into the flow channel formed by the subsequent guide arc plate and the inner arc surface of the lower wing fan. The arc-shaped protrusion of the guide arc plate can effectively reduce the resistance during the rapid flow of condensate and disperse the impact force of the condensate, preventing the condensate from becoming turbulent in the inner cavity of the airfoil. The arc-shaped baffle plate allows the condensate to flow naturally along the arc surface to the drain hole after reaching the baffle plate, reducing the turbulent backflow of condensate and effectively protecting the inner wall of the airfoil.

[0018] 4. The integrated construction makes the entire condensate drainage assembly a whole, enhancing structural strength and stability. The condensate drainage assembly can also evenly distribute stress, avoiding excessive local stress in the upper fan and extending its service life. Attached Figure Description

[0019] Figure 1 This is a side view of the impeller structure of the ventilation fan of this utility model; Figure 2 yes Figure 1 A schematic diagram of the structure from the A-direction view; Figure 3 yes Figure 2 A schematic diagram of a single airfoil blade from the P-direction perspective; Figure 4 This is a three-dimensional structural diagram of the airfoil blade of this utility model; Figure 5 This is a schematic diagram of the airfoil blade structure from the main view of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Fan impeller; 2. Airfoil blade; 21. Upper wing fan; 22. Lower wing fan; 3. Condensate drainage assembly; 31. Guide vane; 32. Drainage arc plate; 33. Baffle plate; 4. Drain hole. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] 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. The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] A fan impeller with drainage holes, such as Figures 1-5As shown, the fan includes a fan impeller 1, airfoil blades 2, a condensate drainage assembly 3, and drain holes 4. Several airfoil blades 2 are installed inside the fan impeller 1, arranged in a ring around the axis of the fan impeller 1. The condensate drainage assembly 3 is located inside the airfoil blades 2. Several drain holes 4 are opened on the leeward side of the airfoil blades 2, and the condensate drainage assembly 3 connects to the drain holes 4. Preferably, there are two drain holes 4, which are square holes. The airfoil blades 2 are formed by welding together two single blades, namely the upper blade 21 and the lower blade 22, forming a shape that is thicker in the middle and thinner at both ends. The method of opening square holes on the airfoil blade 2 is to drain accumulated water. The airfoil blade 2 has high pressure on the windward side, and opening holes on the windward side can easily allow dust and impurities to enter. Therefore, the drain hole 4 is opened on the leeward side of the airfoil blade 2, which is not easy for dust to enter. The condensate drainage component 3 guides the water accumulated in the inner cavity of the airfoil blade 2, optimizes the water flow path, and uses the position and shape design of the drain hole 4 to guide the water to flow in a specific direction, so that the water will not accumulate disorderly in the inner cavity of the blade or flow around, ensuring that the water can be discharged efficiently even when rotating. This avoids the condensate in the inner cavity not being able to be discharged smoothly in the drain hole 4 due to the excessive speed when rotating at high speed.

[0024] like Figure 2 , Figure 4 and Figure 5 As shown, the airfoil blade 2 includes an upper fan 21 and a lower fan 22, which are welded together. A condensate drainage assembly 3 is installed on the inner arc surface of the upper fan 21, and several drainage holes 4 are opened on the lower fan 22. The upper fan 21 is the windward side of the airfoil blade 2, and the lower fan 22 is the leeward side of the airfoil blade 2. The upper fan 21 and the condensate drainage assembly 3 are integrally formed. As the windward side, the upper fan 21 will bear a large airflow pressure during the operation of the ventilator. At the same time, water vapor in the air is also easy to condense here. The condensate drainage assembly 3 is installed on the inner arc surface of the upper fan 21. The shape of the inner arc surface of the upper fan 21 is used to optimize the drainage path, accurately capture and guide the condensate on the inner arc surface of the upper fan 21, and make it flow along the preset path to avoid disorderly accumulation of water in the upper fan 21 and prevent water from causing local corrosion or affecting its aerodynamic performance.

[0025] Together with the drainage hole 4 on the lower wing fan 22, they form a complete drainage system.

[0026] like Figure 4 and Figure 5As shown, the condensate drainage assembly 3 includes a guide plate 31, a drainage arc plate 32, and a baffle plate 33. The drainage arc plate 32 is located between the guide plate 31 and the baffle plate 33. The guide plate 31, the drainage arc plate 32, and the baffle plate 33 are all installed on the inner wall of the windward side of the airfoil blade 2. The guide plate 31, the drainage arc plate 32, and the baffle plate 33 are integrally constructed. This integral construction strengthens the structure. When the fan rotates at high speed and the upper fan 21 bears a load, the baffle plate 33 can... Stress is dispersed to the lower wing fan 22, rather than only through the weld between the upper wing fan 21 and the lower wing fan 22, reducing the stress level at the weld. The flow guide arc plate 32 is an outwardly convex arc plate, which can withstand and disperse the impact force generated by the centrifugal force of the rotating condensate. The impact force is evenly distributed along the curved surface of the convex arc plate to prevent the component from deforming or being damaged. Its arc structure and the inner arc surface of the lower wing fan 22 form a smooth transition flow channel to ensure that the condensate can flow stably and continuously.

[0027] The guide vane 31 is an oblique straight plate located at the head of the inner wall of the airfoil blade 2 on the windward side. It can quickly guide the condensate on the head of the airfoil blade 2 at a preset angle, so that the condensate flows in a specific direction, avoiding disorderly diffusion or accumulation of water at the head, and laying a good foundation for the subsequent diversion process.

[0028] The flow deflector 33 is arc-shaped, semi-C-shaped, and connected to the drain hole 4. The flow deflector 33 is located at the rear of the inner wall of the windward side of the airfoil blade 2. The flow deflector 33 abuts against the leeward side of the airfoil blade 2 and against the lower wing fan 22. The abutting end is adapted to the inner arc surface of the lower wing fan 22. Its arc-shaped structure can effectively block the condensate from continuing to flow backward and gather the water flow together. When the condensate flows along the guide plate 31 and the guide arc plate 32 to the flow deflector 33, the arc design will cause the water flow to concentrate along the arc surface of the flow deflector 33, forming a larger water flow bundle. The condensate gathered at the flow deflector 33 is directly discharged through the drain hole 4.

[0029] Even when the fan rotates at high speed and generates a large centrifugal force, the baffle plate 33 can ensure that the water flows accurately to the drain hole 4, avoiding the problem of water accumulating in the inner cavity of the blade or flowing back.

[0030] Working principle: When the fan is running, the airflow enters from the impeller inlet, flows out along the impeller channel and exits at the outlet. During this process, water will enter the inner cavity through the gap at the head of the airfoil blade 2 and accumulate inside the cavity. Due to the rotation of the impeller, there is centrifugal force. Under the action of this force, the water is guided by the condensate drainage component 3 to move towards the tail of the blade until it reaches the drain hole 4, and then is discharged at the drain hole 4, thus solving the problem of water accumulation in the inner cavity of the airfoil blade 2.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A fan impeller with drainage holes, characterized in that: The device includes a fan impeller (1), airfoil blades (2), a condensate drainage assembly (3), and drain holes (4). Several airfoil blades (2) are installed inside the fan impeller (1). The airfoil blades (2) are arranged in a ring around the axis of the fan impeller (1). The condensate drainage assembly (3) is provided in the inner cavity of the airfoil blades (2). Several drain holes (4) are opened on the leeward side of the airfoil blades (2). The condensate drainage assembly (3) is connected to the drain holes (4).

2. The fan impeller with drainage holes according to claim 1, characterized in that: The airfoil blade (2) includes an upper wing fan (21) and a lower wing fan (22). The upper wing fan (21) and the lower wing fan (22) are welded together. A condensate drainage assembly (3) is installed on the inner arc surface of the upper wing fan (21). Several drainage holes (4) are opened on the lower wing fan (22).

3. The fan impeller with drainage holes according to claim 1, characterized in that: The condensate drainage assembly (3) includes a guide plate (31), a drainage arc plate (32), and a flow-blocking plate (33). The drainage arc plate (32) is located between the guide plate (31) and the flow-blocking plate (33). The guide plate (31), the drainage arc plate (32), and the flow-blocking plate (33) are all installed on the inner wall of the windward side of the airfoil blade (2).

4. The fan impeller with drainage holes according to claim 3, characterized in that: The guide plate (31), the flow-guiding arc plate (32), and the flow-blocking plate (33) are integrally constructed.

5. A fan impeller with drainage holes according to claim 4, characterized in that: The guide vane (31) is located at the head of the inner wall of the airfoil blade (2) on the windward side, and the deflector (33) is located at the tail of the inner wall of the airfoil blade (2) on the windward side. The deflector (33) abuts against the leeward side of the airfoil blade (2).

6. A fan impeller with drainage holes according to claim 5, characterized in that: The flow-blocking plate (33) is arc-shaped and is connected to the drain hole (4).

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