China best Heavy Duty Offshore/ Onshore Skid Mounted Explosion Proof ATEX Certified Zone 2 Stationary Diesel Engine Direct Driven Rotary Screw Air Compressor for Sale air compressor oil

Product Description

 

DENAIR hot sale series diesel portable air compressors
Model Machine Diesel Engine
Free Air Delivery Normal Working Dimensions Weight  Manufacturer  Model Rated
 Pressure (without towbar)         power
  m3/min CFM bar(g) psig L*W*H(mm) kg KW
DACY-3.2/8 3.40  120 8 116 2263*1590*1543 9, China
Our factory is located in  No. 366, YangzhuangBang Street, Pingxing Rd., Xindai Town, HangZhou, ZHangZhoug Province, China

Q3: Warranty terms of your machine? 
A3: Two years warranty for the machine and technical support according to your needs.

Q4: Will you provide some spare parts of the machines? 
A4: Yes, of course.

Q5: How long will you take to arrange production? 
A5: 380V 50HZ we can delivery the goods within 10 days. Other electricity or other color we will delivery within 22 days

Q6: Can you accept OEM orders? 
A6: Yes, with professional design team, OEM orders are highly welcome.
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Lubrication Style: Lubricated
Cooling System: Air Cooling and Water Cooling
Power Source: Diesel Engine
Customization:
Available

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

air compressor

What Is the Role of Oil in Lubricated Screw Compressors?

In lubricated screw compressors, oil plays a crucial role in ensuring optimal performance, reliability, and longevity of the compressor. Here’s a detailed explanation of the role of oil in lubricated screw compressors:

Lubrication: One of the primary functions of oil in screw compressors is to provide lubrication to the moving parts, particularly the screw rotors. The oil forms a thin film between the rotors and the compressor housing, reducing friction and wear. This lubrication minimizes mechanical losses and helps maintain efficient operation by reducing energy consumption.

Sealing: Oil also acts as a sealing medium in lubricated screw compressors. The oil film created between the rotors and the compressor housing helps create a seal, preventing air or gas leakage between the high-pressure and low-pressure sides of the compressor. This sealing action is crucial for maintaining the compressors’ efficiency and preventing losses in compression performance.

Cooling: Oil plays a vital role in cooling various components of the screw compressor. As the compressed air or gas is compressed, it generates heat. The oil absorbs a significant amount of this heat and carries it away from the compression chamber. The oil then circulates through the compressor’s oil cooling system, where it dissipates the heat to the surrounding environment or through an oil cooler. Efficient oil cooling helps prevent overheating of the compressor components, ensuring reliable operation and extending the compressor’s lifespan.

Cleaning: The oil in lubricated screw compressors acts as a cleaning agent. It carries away contaminants, such as dirt, dust, and metal particles, that may enter the compressor during operation. The oil passes through filters and separators, removing these impurities and preventing them from accumulating in the compressor’s internal components. Clean oil helps maintain the integrity of the compressor’s internal parts and reduces the risk of damage or malfunctions.

Sealing Element Lubrication: In some lubricated screw compressors, the oil also serves to lubricate the sealing elements, such as the shaft seals or labyrinth seals. Proper lubrication of these seals helps maintain their effectiveness in preventing oil leakage and maintaining the separation between the oil and the compressed air or gas.

Corrosion Protection: Oil in screw compressors often contains additives that provide corrosion protection to the internal components. These additives form a protective layer on the metal surfaces, preventing corrosion caused by moisture or contaminants present in the compressed air or gas. Corrosion prevention helps maintain the compressor’s performance, efficiency, and reliability over time.

It’s important to note that lubricated screw compressors require regular oil monitoring, oil analysis, and oil changes to ensure optimal performance. The oil level, quality, and viscosity should be regularly checked and maintained within the manufacturer’s recommended specifications.

In summary, oil in lubricated screw compressors serves crucial functions such as lubrication, sealing, cooling, cleaning, sealing element lubrication, and corrosion protection. These functions collectively contribute to the efficient and reliable operation of the compressor, extending its service life and minimizing maintenance requirements.

air compressor

What Is the Impact of Ambient Temperature on Screw Compressor Performance?

Ambient temperature has a significant impact on the performance of screw compressors. Here’s a detailed explanation:

Screw compressors, like other types of compressors, rely on the surrounding environment to dissipate heat and maintain optimal operating conditions. The ambient temperature directly affects the compressor’s efficiency, capacity, power consumption, and overall performance.

Here are the key ways in which ambient temperature influences screw compressor performance:

1. Cooling Efficiency:

The cooling efficiency of a screw compressor is affected by the temperature difference between the compressed gas and the ambient air. As the ambient temperature increases, the temperature difference decreases, making it more challenging to transfer heat effectively. This can lead to higher discharge temperatures and reduced cooling efficiency, potentially impacting the compressor’s overall capacity and performance.

2. Capacity and Power Consumption:

Higher ambient temperatures can decrease the capacity of a screw compressor. Compressors are typically designed and rated based on specific operating conditions, including a defined ambient temperature range. When the ambient temperature exceeds the design limits, the compressor may experience reduced volumetric efficiency, resulting in a decrease in its overall capacity. Additionally, the compressor may require more power to maintain the desired pressure levels, leading to increased power consumption.

3. Heat Recovery:

In some applications, screw compressors are equipped with heat recovery systems to utilize the waste heat generated during compression. The effectiveness of heat recovery is influenced by the ambient temperature. Higher ambient temperatures can reduce the temperature differential available for heat exchange, limiting the potential for heat recovery and decreasing the overall system efficiency.

4. Lubrication and Cooling:

Screw compressors rely on lubrication systems to reduce friction and prevent wear between moving parts. The ambient temperature affects the performance of the lubricant. In high ambient temperatures, the lubricant may experience decreased viscosity, potentially leading to inadequate lubrication and increased wear on compressor components. Similarly, the cooling system of the compressor, including fans and heat exchangers, may be less effective in higher ambient temperatures, impacting the compressor’s ability to dissipate heat.

5. Operating Envelope:

Screw compressors have specified operating envelopes, which define the acceptable range of operating conditions, including ambient temperature. Operating the compressor outside its designed ambient temperature range can result in reduced reliability, increased maintenance requirements, and potential system failures. It is crucial to adhere to the manufacturer’s guidelines and ensure that the compressor operates within the recommended ambient temperature limits.

6. Control and Protection:

Modern screw compressors often feature advanced control and protection systems that monitor various parameters, including ambient temperature. These systems may adjust compressor operation, such as modulation of capacity or cooling strategies, to optimize performance and protect the compressor from operating outside safe limits. Understanding the impact of ambient temperature allows for appropriate adjustments and settings to maintain reliable and efficient compressor operation.

It’s important to note that different compressor models and manufacturers may have specific performance characteristics and operating limits. Therefore, consulting the manufacturer’s documentation and guidelines for the particular screw compressor in use is essential.

In summary, ambient temperature significantly affects the performance of screw compressors. Higher ambient temperatures can reduce cooling efficiency, decrease compressor capacity, increase power consumption, and impact lubrication and cooling systems. Adhering to recommended operating conditions and considering ambient temperature limitations are crucial for ensuring optimal performance, reliability, and longevity of screw compressors.

air compressor

Are There Different Types of Screw Compressors?

Yes, there are different types of screw compressors available, catering to various application requirements. Here’s an overview of the main types:

1. Oil-Injected Screw Compressors:

Oil-injected screw compressors, also known as lubricated screw compressors, are the most common type. These compressors require the injection of a small amount of lubricating oil into the compression chamber. The oil serves multiple purposes, including lubrication, cooling, sealing, and reducing friction between the rotors. Oil-injected screw compressors are widely used in industrial applications where a small amount of oil in the compressed air is acceptable.

2. Oil-Free Screw Compressors:

Oil-free screw compressors are designed to operate without the need for oil lubrication. These compressors incorporate specialized rotor coatings, such as PTFE (polytetrafluoroethylene) or other non-stick materials, to reduce friction and eliminate the need for oil. Oil-free screw compressors are preferred in applications that require oil-free and contaminant-free compressed air. Industries like food and beverage, pharmaceuticals, electronics, and others often rely on oil-free screw compressors to ensure the purity of the compressed air.

3. Variable Speed Drive (VSD) Screw Compressors:

VSD screw compressors, also known as variable frequency drive (VFD) screw compressors, are equipped with a variable speed drive system. This system allows the compressor to adjust the rotational speed of the motor and, consequently, the speed of the screw rotors. By varying the speed, VSD screw compressors can closely match the compressed air or gas demand, resulting in energy savings and improved efficiency. VSD screw compressors are particularly beneficial in applications with varying air demand, as they can adapt their output accordingly.

4. Two-Stage Screw Compressors:

Two-stage screw compressors consist of two sets of rotors arranged in series. The first stage compresses the air or gas to an intermediate pressure, and the second stage further compresses it to the desired final pressure. Two-stage screw compressors are commonly used in applications that require higher discharge pressures. By dividing the compression into two stages, these compressors can achieve higher efficiency and improved performance in high-pressure applications.

5. Water-Injected Screw Compressors:

Water-injected screw compressors, also known as liquid-injected screw compressors, utilize water or a water-glycol mixture as a sealing and cooling medium. The water injection helps in sealing the compression chamber and reduces the discharge temperature, enhancing the compressor’s efficiency. Water-injected screw compressors are often used in applications where oil contamination is a concern, such as in the pharmaceutical and food processing industries.

Each type of screw compressor has its own advantages and is suitable for specific applications. The choice of the screw compressor type depends on factors such as the desired level of air purity, the need for oil-free operation, energy efficiency requirements, and the operating conditions of the application.

China best Heavy Duty Offshore/ Onshore Skid Mounted Explosion Proof ATEX Certified Zone 2 Stationary Diesel Engine Direct Driven Rotary Screw Air Compressor for Sale   air compressor oilChina best Heavy Duty Offshore/ Onshore Skid Mounted Explosion Proof ATEX Certified Zone 2 Stationary Diesel Engine Direct Driven Rotary Screw Air Compressor for Sale   air compressor oil
editor by CX 2024-01-17

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