Factors Affecting the Price of Screw Air Compressor
Factors Affecting the Price of Screw Air Compressor
The price of a screw air compressor is influenced by various factors, including materials, quality, and other essential components.
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One of the primary factors contributing to the cost of an air compressor is the main engine. Some manufacturers opt for smaller engines to reduce expenses. However, the engine size greatly impacts the air compressor's gas output. To compensate for the reduction in engine cost and size, manufacturers often resort to adjusting the host speed. This approach, while cost-effective, has several drawbacks.
Increasing the size of the screw is one option to maintain production capacity. In such cases, manufacturers may increase the rotation speed, which is intended to meet the air consumption standards required. Nevertheless, this method poses several challenges:
- The performance of mechanical products can become unstable at higher rotational speeds, increasing the risk of premature engine failure.
- High speeds lead to increased temperatures, complicating the oil's ability to dissipate heat, resulting in potential irreversible high-temperature shutdowns.
- Accelerated wear of the screw due to high rotation negatively affects the overall lifespan of the compressor.
- Significant noise generation at elevated speeds can have harmful effects on human health.
- Energy demands increase with speed; hence, costs associated with electricity consumption also rise.
The materials used in the screw air compressor's main engine also play a crucial role in determining its price.
1. The use of forged steel:
Forged steel components demonstrate superior quality compared to steel castings, as they can withstand larger impact forces. Their enhanced plasticity and toughness encourage their use in essential machine parts. Components made of forged steel tend to have a smaller expansion coefficient, resulting in reduced deformation, improved wear resistance, and lower leakage rates, thus enhancing efficiency and longevity.
2. Main engines crafted from ball-milled cast iron:
In this material, carbon precipitates in the form of graphite. If the graphite appears in strips, the cast iron is termed gray cast iron; if in spherical form, it is known as ductile cast iron.
Ductile iron castings often develop small internal voids during processes like heat treatment or machining, attributed to high surface tension in the magnesium-containing iron, which hampers gas discharge. These voids can lead to detrimental defects if not carefully managed.
Additionally, the quality of compressor accessories—such as air filters, oil filters, oil-gas separation cores, and lubricating oil—significantly influences the overall price. When selecting a screw air compressor, it is vital not to solely prioritize low-cost options at the expense of quality.