Detailed View: Internal Structure Frontside
Detailed View: Internal Structure Backside
Fundamental Working Principle
In an ideal air compression process, the power required for single-stage pressure transmission equals the sum needed for multi-stage compression. However, in real-world applications, this power increases due to factors like coupling power loss, bearing friction, and the cooling effects of liquid viscosity. To minimize this wasted power, reducing the compression ratio at each stage ensures that the total power for multi-stage compression is less than that for single-stage compression.
The two-stage screw air compressor features a two-stage rotary screw mechanism, with each stage comprising an active and a passive screw. The active screw drives the passive screw through an external power transmission system. The first stage employs a low-pressure rate screw group, while the second stage utilizes a high-pressure rate screw group. A sealing air film surrounds each screw, and during rotation, gas undergoes suction, pressurization, and exhaust.
First Stage Compression: The initial stage of the two-stage screw air compressor utilizes a low-pressure rate screw group. The gas is drawn into the screw compression chamber via the suction valve. Under the rapid rotation of the screw rotor, the gas is gradually compressed and transferred to the second stage.
Second Stage Compression: In the advanced stage, the gas moves into a more confined screw space, experiencing higher temperature and pressure compression. The exhaust valve then opens, releasing high-pressure gases from the system.
Natural air is filtered and drawn into the first stage of compression, where it mixes with a small amount of lubricating oil. This mixture is compressed to interstage pressure and then cooled as it contacts significant amounts of oil mist in the cooling channel. The cooled, compressed gas then enters the second-stage rotor for final compression to exhaust pressure, completing the cycle as it exits through the exhaust valve.
Water-cooled compressors utilize water as the cooling medium, ensuring an efficient heat dissipation process. As the cooling water circulates within the air compressor, it not only cleans but also enhances lubrication, thus prolonging the lifespan of friction-wearing parts. By effectively removing heat from the cylinder and compressed gas during operation, these compressors significantly lower the exhaust temperature and power consumption, leading to reduced operational costs. However, it is crucial to address potential scaling issues within the water cooling system.
1) Superior PM Motor Efficiency: Our permanent magnet motors boast a broader constant torque and weak magnetic range, achieving 20-30% higher efficiency compared to conventional motors. Even when operating away from the rated frequency, the efficiency remains consistently high, ensuring unparalleled motor performance.
2) Maintenance-Free Motor:The ingenious design of the permanent magnet motor, devoid of bearings, eradicates the need for bearing maintenance and replacement, thereby cutting down maintenance costs.
3) Integrated Frequency Converter: Employing China's premier frequency system, our compressors offer a vast speed regulation range with exceptional precision. This ensures energy-efficient operation tailored to the user's actual gas demand, delivering significant energy savings.
4) Zero Transmission Loss: With a direct connection between the permanent magnet motor and compressor via an embedded integrated shaft, the structure is more compact. The elimination of coupling and other transmission parts results in a 100% transmission efficiency.
5) Soft and Variable Frequency Startachieved by our motor reduce impacts on power grid equipment, ensuring the integrity of electrical systems.
6) Energy Consumption Reduction: Our compressors offer a frequency conversion range from 25% to 100%, compared to the 50% to 100% range of ordinary frequency converters. This provides over 30% energy savings compared to fixed-speed compressors and around 5% savings over standard variable frequency compressors. The greater the fluctuation in system gas consumption, the more pronounced the energy-saving benefits.
7) Unique Two-Stage Compression Air End:The innovative design of our two-stage compression screw machine integrates the first and second-stage compression rotors within a single casing. By rotating each stage through gears, it achieves the optimal linear speed for each rotor, thereby enhancing compression efficiency.
8) Advanced Internal Spray Curtain Cooling Method: Our high-energy-saving internal spray curtain cooling technique significantly lowers compressed air temperatures and achieves near-isothermal compression. This method also minimizes pressure loss between stages, reduces the compression ratio, and boosts compression efficiency.
9) Minimized Internal Leakage:Two-stage compression reduces the compression ratio for each stage, decreasing internal leakage from high to low-pressure ends and improving volumetric efficiency.
10) Noise Reduction:The reduced compression ratio in two-stage compression substantially lowers noise levels, particularly during unloading.
11) Simplified Maintenance and Service:While the two-stage compressor unit shares most systems and structures with single-stage units, simplifying maintenance and user convenience, the screw air end remains the primary distinguishing feature.
1. Competitive Pricing
We offer direct ex-factory prices to our customers, empowering them to stay ahead of the competition with more attractive pricing.
2. Direct Transactions
Our products are supplied straight from the factory, ensuring that you receive cost-effective solutions without any intermediaries.
3. Comprehensive OEM & ODM Services
Leveraging our factory's robust production and management capabilities, we provide extensive OEM/ODM services tailored to your needs.
4. Customization Options
We welcome non-standard, export, and tailored orders to meet your specific voltage/power/pressure requirements. Contact us to discuss your customization needs.
5. Small Order Acceptance
Feel free to place a small trial order to evaluate the superior quality of our products.
6. Rapid Delivery
Benefit from our high-quality products with prompt and timely delivery to meet your demands.
7. Full Authorization
Distributors receive comprehensive authorization certificates, empowering you to market and sell our prestigious SANZHI brand products with confidence.
Sanzhi (Henan) Compressor Co., Ltd. is a distinguished manufacturer specializing in screw air compressors and vacuum pumps, boasting over a decade of industry expertise. Our expansive product lineup features normal pressure and low-pressure screw air compressors, permanent magnet frequency conversion models, two-stage compression units, specialized compressors for laser cutting, versatile single-tank and double-tank mobile screw compressors, electric and diesel mobile screw compressors, and advanced screw vacuum pumps.
Our production capabilities are unparalleled, utilizing state-of-the-art multi-air compressor assembly lines that ensure lean, modern manufacturing processes. Driven by a dedicated team of over 50 employees, we continuously refine our management systems, including ERP, to reduce lead times and ensure the swift delivery of high-quality products.
In management, we proudly uphold the ISO9001 quality management system certification. Our commitment to stringent quality control is unwavering, with meticulous inspections at every stage-material, production, and pre-delivery-ensuring each machine meets our rigorous standards.
Our customer service is second to none. Pre-sales, we provide expert guidance to help customers select the perfect air equipment for their diverse needs, offering high levels of customization in appearance and configuration. We also excel in OEM production, crafting unique products to meet dealer specifications. Post-sales, our professional sales and service team stands ready to respond swiftly to any customer inquiries.
At Sanzhi (Henan) Compressor Co., Ltd., we are committed to delivering top-notch, reliable products and fostering long-term relationships with our clients. With our efficient delivery systems, high-quality machines, and competitive pricing, we are your trusted partner for premium compressed air solutions.
Our factory is conveniently situated in Xinzheng City, Henan Province, China. We are pleased to offer transportation from Xinzheng International Airport to our facility, located just 30 kilometers away, approximately a one-hour journey. We warmly welcome you to visit our company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a professional manufacturer of screw air compressors, with more than 10 years of experience.
Q2. How do you control quality?
A: 1. The raw materials are strictly inspected.
2. Installation procedures are strictly controlled.
3. Each machine must pass at least 5 hours of continuous testing before leaving the factory.
Q3. What information must I provide to get the suitable machine?
1. How much air delivery capacity (Unit: CFM or m³/Min)
2. How much working pressure (Unit: PSI, Bar or Mpa)
3. What is the voltage and frequency of my country of residence (V/Hz)
4. Whether I need other accessories such as an air tank, filters, and/or air dryers.
Tell us the answer, we will offer a scheme for you!
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI
1m³/min = 35.32cfm
1KW = 1.34HP
Q5. What is the available voltage air compressor?
A: Sanzhi available voltage include 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, and can be customized according to your requirements.
Q6. How long is the delivery time?
A: For standard voltage,15 working days after the confirmed order. Non-standard, please contact our sales.
Q7. What's the payment term?
A: 30% T/T in advance, 40% T/T before shipment, and 30% T/T against the B/L copy. USD, RMB can be accepted.
Q8. How about your warranty?
A: One year for the whole machine and two years for screw air compressor, except for consumable spare parts.
Q9. What about the maintenance?
A: First maintenance needs to be done after 500 hours, and then every 2000-3000 hours to do the normal maintenance, and consider the actual environment.
Q10. Can machines be run in high-temperature environment?
A: Yes, machines would run in high-temperature environment countries. Working temperature from -20° to 45°(-4ºF-113ºF).
Q11. Do you offer OEM service?
A: Yes, with a professional design team, both OEM & ODM orders are highly welcome.
Q12. How long could your air compressor be used?
A: Generally, more than 10 years.
Q13. Will you provide some spare parts for the machines?
A: Yes, of course.
Q14. How about your after-sales service?
A: Provide customers with installation and commissioning online instructions, and arrange for our engineers to help you with training and installation.
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