SCD Series Single-Unit Two-Stage Screw Refrigeration Compressor

SCD Series Single-Stage Two-Stage Screw Refrigeration Compressor was co-developed by Xinlei and Xi’an Jiaotong University. Featuring a patented 5:7 asymmetric high-efficiency rotor profile, it adopts a dual-motor direct-drive design with dual-V volume ratio control and high-efficiency PMSM technology, ensuring energy-saving, stable, and high-performance operation.

Airflow rate——High-pressure stage: 132–315 m³/h Low-pressure stage: 279–655 m³/hRotational speed—— High-pressure stage: 3000–3900 rpm Low-pressure stage: 2500–3450 rpm

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Features Core Technology Machine structure IOT Technology Application Scenarios

Features

High Efficiency and Energy Saving

Motor efficiency exceeds 95% across all operating conditions, reaching up to 97.5%.

Stable and Reliable

The insulation class for both high-voltage and low-voltage motors is rated as Class H, with a temperature resistance of 180°C, which is one grade higher than Class F.

Core Technology

Bilateral Asymmetric 5:7-Type Line Design

The 5:7 double-sided asymmetrical tooth design significantly reduces the area of the leakage triangle, lowers rotor tooth leakage, and achieves higher energy efficiency;

It can completely achieve “curved surface to curved surface” sealing, which helps form an oil film to reduce lateral leakage of the contact line, further improving volumetric efficiency and reliability.

Permanent Magnet Synchronous Motor

Permanent magnet synchronous motors are smaller in size and 10% more efficient than traditional asynchronous motors;

High-efficiency permanent magnet synchronous motors with 97.5% efficiency at full load and 95% efficiency at partial load;

H-class insulation design with a maximum temperature resistance of 180°C and high reliability.

Swedish SKF Bearings

SKF bearings from Sweden have an ultra-long service life and can operate continuously for more than 50,000 hours;

SKF bearings are manufactured to high precision standards, ensuring stable compressor operation at all times.

Machine structure

Industry-leading frequency converter

High reliability, overall temperature rise testing, long service life design, selection of new-generation IGBT module technology, high junction temperature, high power density;

Integrated motor protection, alarm, communication bus, user programmable, and other combination functions are rich and powerful, with stable performance.

Dual frequency converters independently drive high and low-voltage motors

Dual frequency conversion technology actively and precisely controls the pressure between the high and low pressure stages to achieve higher energy efficiency;

Variable frequency control avoids energy losses generated during partial load operation, further improving the partial load performance of the unit; Spatial vector pulse width modulation technology, real-time accurate and efficient operation, achieving energy savings across the entire load range.

5:7 rotor profile

The 5:7 bilateral asymmetrical tooth design significantly reduces the area of the leakage triangle, lowers rotor tooth leakage, and achieves higher energy efficiency；

Permanent magnet synchronous motor

Permanent magnet synchronous motors are smaller in size and 10% more efficient than traditional asynchronous motors:; High-efficiency permanent magnet synchronous motors, with a full load efficiency of 97.5% and a partial load efficiency of >95%;

H-class insulation design, with a maximum temperature resistance of 180°C and high reliability.

IOT Technology

The cloud platform can record and provide the operating status and operating parameters of the wind turbines bound to the platform, as well as perform fault alarm and data recording analysis. Users can log in to the platform to realize remote monitoring and energy-saving settings management, enabling users to realize real-time equipment management. At present, the IoT cloud platform provides ANDRIOD, IOS, and PC clients, and open interfaces to link with third-party software such as ERP, providing users with more possibilities.

Statistical analysis of gas data to help enterprises make business decisionsStable air pressure, scientific energy saving of the wholeUse gas on demand to avoid wasting energyEquipment operation daily records, maintenance and daily management are more convenientReal-time monitoring of energy consumption, real-time data collectionVisualize equipment running status and view real-time working statusEquipment remote management, intelligent joint control