Adjusting Fan Blade Pitch

The trial pitch is the calculated setting for design conditions (water rate , heat load, air density, and brake horsepower). The trial pitch is provided (see page 2).

1–Select a position on the fan circumference and rotate each blade to this common location when setting or checking blade pitch. Sup- port the blade tip to maintain a common rotation plane while setting the fan pitch. The pitch is set within 2″ (51mm) of the blade tip by placing a bevel protractor on top of a parallel sided straight edge that extends across blade width as shown in Figure 6.

2–Pull the blade outward so the safety shoulder is in contact with the blade clamp, then set the pitch. See Figure 5. Blades should be within ± 1/4° of the desired pitch angle. After the de- sired setting is obtained, progressively tighten the 3/4″ hex nuts to 120 ft·lbƒ (163 N·m) torque. Recheck the pitch angle. If required, loosen the hex nuts and reset the pitch as necessary until the proper pitch angle is obtained with the 3/4″ hex nuts at 120 ft·lbƒ (163 N·m) torque.

3–Repeat step 2 for all blades.

4–Check the vertical blade-tip track variation. The allowable verti- cal variation from a reference plane is ±1″ (25mm). If a blade’s tip track is out of tolerance, loosen the 3/4″ hardware and change the blade tip support location higher or lower as required to adjust the tip track. Recheck blade pitch angle.

Figure 6

BLADE

STRAIGHT

BEVEL

TIP

EDGE

PROTRACTOR

 

 

PITCH ANGLE

2"

8

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Image 8
SPX Cooling Technologies HP700 user manual Adjusting Fan Blade Pitch, Tip
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HP700 specifications

SPX Cooling Technologies HP700 is a state-of-the-art cooling tower designed to meet the demanding needs of modern industrial and commercial applications. With its robust construction and innovative design, the HP700 offers reliable performance while minimizing energy consumption and operational costs.

One of the main features of the HP700 is its high-efficiency fan design, which significantly enhances air flow and cooling capacity. The use of advanced aerodynamics in the fan blade design reduces energy consumption while maintaining optimal cooling performance. Additionally, the variable frequency drive (VFD) technology allows for adjustable fan speeds, ensuring that the cooling tower can respond effectively to fluctuating thermal loads.

The HP700 also boasts a unique, patented fill design that maximizes water distribution and contact time. This enhanced fill enhances heat transfer efficiency, allowing for more effective cooling in a compact footprint. The fill material is constructed from durable, corrosion-resistant materials, ensuring longevity and reduced maintenance needs.

Energy efficiency is a priority for the HP700, which incorporates the latest technologies in terms of heat exchange and water management. The design includes advanced drift eliminators that reduce water loss, while specially designed nozzles ensure optimal water distribution across the fill. This innovative approach not only preserves water resources but also enhances overall system performance.

In terms of construction, the HP700 is built with high-strength materials, including fiberglass-reinforced plastic and stainless steel. These materials offer superior resistance to corrosion and wear, making the HP700 suitable for a variety of environments, including those with harsh chemical exposure or varying weather conditions.

Another noteworthy characteristic of the HP700 is its modular design, which allows for easy installation and scalability. This feature enables facilities to expand their cooling capabilities as their requirements grow, ensuring long-term operational flexibility. Additionally, SPX Cooling Technologies provides comprehensive support services, including installation assistance and ongoing maintenance, further enhancing the value of the HP700.

In summary, the SPX Cooling Technologies HP700 is a highly efficient, durable, and flexible cooling solution that stands out in the competitive market. Its cutting-edge features, including advanced fan technology, optimized fill design, and energy-efficient operation, make it an excellent choice for a wide range of industrial and commercial cooling applications. With its commitment to quality and performance, SPX Cooling Technologies continues to lead the way in innovative cooling solutions.
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