Cooling tower fan blade facilitating angle measurement

Abstract

The utility model discloses a cooling tower fan blade convenient to angle measurement, including blade base body and be located on the blade base body flat boss, the blade base body has the pressure surface and work surface of opposite arrangement, flat boss with the blade base body is integrative forming structure, and this flat boss is located the pressure surface of blade base body, flat boss surface with the tangent line of blade base body pressure surface before and after edge highest point parallel, the utility model discloses can realize quick, accurately measure fan blade angle, and bring great convenience to cooling tower field blade installation angle, greatly reduce manpower and work hours, improve blade installation efficiency and the accuracy of installation angle to provide favorable guarantee for the smooth operation of cooling tower fan.

Description

Technical Field

[0001] This utility model relates to the field of cooling tower fans, and more specifically, to a cooling tower fan blade that is easy to measure angles. Background Technology

[0002] Cooling tower fans are generally composed of components such as impellers, reducers, couplings, oil level gauges, and motors. The impeller is a crucial transmission component in a cooling tower fan, consisting of a hub and a set of blades. When providing an impeller design, the blade installation angle must be determined based on site conditions and performance requirements. Therefore, the blade installation angle directly affects the smooth operation of the fan and its cooling effect.

[0003] Cooling towers operate in harsh environments, placing high demands on fan performance. Accurate blade installation angles are crucial, and blades within the same group must maintain identical angles. Inconsistent blade angles can lead to noise, vibration, and even blade breakage during operation. Therefore, precise blade angle measurement is essential. The traditional method involves first preparing a horizontal angle gauge and adjusting it to the desired angle. Then, the measurement point for the installation angle is located on the aerodynamic surface of the blade (50mm from the blade tip). A straight strip is placed at this point, perpendicular to the blade axis. The horizontal angle gauge is then placed on the strip, and the blade is finely rotated until the bubble on the gauge is centered, indicating the desired angle has been achieved. Finally, the blade fasteners are tightened. However, there are many uncertainties in obtaining measurement points during this process. First, the measuring strip needs to be perpendicular to the blade axis, which is difficult to achieve on-site, relying entirely on the experience and visual inspection of the installers. Furthermore, the strip is prone to slipping on the blade, making it difficult to stably observe the bubble level on the spirit level. Multiple adjustments are required to achieve the required accuracy, significantly increasing the labor intensity and installation time for the installers. Second, due to the tolerances left by the molding process between the blades, a 50mm distance from the blade tip will introduce secondary errors. Additionally, the measuring strip needs to be straight and rigid. Currently, to meet industry demands, cooling tower fans are becoming increasingly larger, with correspondingly wider blades. The measuring strips required for angle measurement need to be longer and heavier, making them inconvenient to carry and requiring more manpower. Therefore, there is an urgent need for a method or structure that can conveniently and accurately locate the measurement position, enabling quick, convenient, and accurate measurement of blade angles during installation. This would reduce the labor intensity of workers, improve installation efficiency, and ensure the operational performance of the fan. Utility Model Content

[0004] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a cooling tower fan blade that is easy to measure the angle. It can realize the rapid and accurate measurement of the fan blade angle, which greatly facilitates the on-site installation angle of the cooling tower blade, greatly reduces manpower and time, improves the blade installation efficiency and the accuracy of the installation angle, and thus provides a favorable guarantee for the smooth operation of the cooling tower fan.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a cooling tower fan blade that facilitates angle measurement, including a blade base and a straight boss provided on the blade base;

[0007] The blade base has a pressure surface and a working surface that are arranged opposite to each other;

[0008] The flat boss and the blade base are integrally formed; the flat boss is located on the pressure surface of the blade base.

[0009] The surface of the flat boss is parallel to the tangents at the highest points of the leading and trailing edges of the pressure surface of the blade base.

[0010] Preferably, the distance between the center of the width of the flat boss and the tip of the blade base is 50-80 mm.

[0011] Preferably, the width of the flat boss is 20-25mm and the length is 200-250mm.

[0012] The present invention has the following beneficial effects:

[0013] 1. The cooling tower fan blade of this utility model, which facilitates angle measurement, allows one person to measure the angle near the blade tip during installation. Simply place the adjusted horizontal angle gauge parallel to any position on the blade boss, while another person rotates the blade near the blade shank to fine-tune the angle. The angle adjustment is complete when the bubble on the horizontal angle gauge is in the center. Then, tighten the blade fasteners. Repeat the same method to adjust the angle of the next blade. Using the cooling tower fan blade of this utility model, which facilitates angle measurement, the adjustment of the blade angle is faster and more convenient. Moreover, since the blades in the same group are made from the same mold, the angle measurement position can be ensured to be the same, thereby greatly reducing the angle error of the blades in the same group and ensuring the normal and efficient operation of the cooling tower fan.

[0014] 2. The cooling tower fan blades of this utility model, which facilitate angle measurement, can quickly and accurately measure the fan blade angle, greatly facilitating the on-site installation angle of the cooling tower blades, significantly reducing manpower and time, improving installation efficiency and the accuracy of the installation angle, and thus providing a favorable guarantee for the smooth operation of the cooling tower fan. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a cooling tower fan blade for easy angle measurement according to the present invention.

[0016] Figure 2 This is a front view of the cooling tower fan blades of this utility model, which facilitates angle measurement.

[0017] Figure 3 In the middle, (a) is Figure 2 Section AA, (b) is Figure 2 Middle BB section view;

[0018] Figure 4 This is a schematic diagram illustrating the angle measurement method for cooling tower fan blades according to the present invention, which facilitates angle measurement.

[0019] In the figure, 1 is the blade base; 2 is the flat boss; 3 is the pressure surface; 4 is the tangent line at the highest point of the leading and trailing edges of the pressure surface of the blade base; 5 is the working surface; 6 is the petiole; 7 is the blade tip; 8 is the horizontal angle ruler; K is the distance between the center of the width of the flat boss and the blade tip of the blade base; L is the length of the flat boss; W is the width of the flat boss. Detailed Implementation

[0020] To better understand the above-mentioned technical solution of this utility model, the technical solution of this utility model will be further described below in conjunction with the embodiments.

[0021] Combination Figures 1-3 As shown, this utility model discloses a cooling tower fan blade for easy angle measurement, comprising a blade base 1 and a straight boss 2 disposed on the blade base 1. The blade base 1 has a pressure surface 3 and a working surface 5 arranged opposite to each other. The straight boss 2 and the blade base 1 are integrally formed, that is, manufactured integrally using the same mold; the straight boss 2 is disposed on the pressure surface 3 of the blade base 1; the surface of the straight boss 2 is parallel to the tangent line 4 at the highest point of the leading and trailing edges of the pressure surface 3 of the blade base 1. The straight boss 2 is the angle measurement position of the blade, and a horizontal angle gauge 8 adjusted to the required angle can be placed at any position on the straight boss 2 for measurement.

[0022] Combination Figure 2 , Figure 3 As shown, the distance K between the center of the width of the flat boss 2 and the blade tip 7 of the blade base 1 is 50-80mm, which effectively avoids the irregular flash and rounded corners caused by the manufacturing process of the blade tip. The width W of the flat boss 2 is 20-25mm and the length L is 200-250mm. The length and width can ensure that the horizontal angle ruler is placed stably on the flat boss 2. The height of the flat boss 2 does not exceed the tangent line 4 of the highest point of the front and rear edges, so as not to affect the performance of the fan.

[0023] The aforementioned cooling tower fan blades, designed for easy angle measurement, eliminate the need to measure each blade individually to determine its installation position during impeller installation and blade angle adjustment in the cooling tower, and also eliminate the need for additional blade strips. During installation, one person can measure the angle near the blade tip (7), simply following the... Figure 4 As shown, adjust the horizontal angle gauge 8 to the desired angle and place it parallel to any position on the flat boss 2 of the pressure surface 3 of the blade base 1. Another person rotates the blade base 1 near the blade handle 6 to fine-tune the angle. When the bubble on the horizontal angle gauge 8 is in the center, the angle adjustment is complete. Tighten the blade fasteners. Repeat the same method to adjust the angles of other blades in the same group. After all blades have been adjusted and installed, measure the angle again. If there is any error, make fine adjustments until the requirements are met, and then tighten the blades again to complete the blade installation. Using the cooling tower fan blades of this utility model that facilitate angle measurement, the angle of the fan blades can be measured quickly and accurately. Moreover, since the blades in the same group are made from the same mold, the position for measuring the angle can be ensured to be the same, which greatly reduces the angle error of the blades in the same group. This brings great convenience to the on-site installation angle of the cooling tower blades, greatly reduces manpower and time, improves installation efficiency and the accuracy of the installation angle, and thus provides a favorable guarantee for the smooth operation of the fan.

[0024] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A cooling tower fan blade that facilitates angle measurement, characterized in that, Includes a blade base and a straight boss provided on the blade base; The blade base has a pressure surface and a working surface that are arranged opposite to each other; The flat boss and the blade base are integrally formed; the flat boss is located on the pressure surface of the blade base. The surface of the flat boss is parallel to the tangents at the highest points of the leading and trailing edges of the pressure surface of the blade base.

2. The cooling tower fan blade for easy angle measurement according to claim 1, characterized in that, The distance between the center of the width of the flat boss and the tip of the blade base is 50-80 mm.

3. The cooling tower fan blade for easy angle measurement according to claim 1, characterized in that, The width of the flat boss is 20-25mm and the length is 200-250mm.

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