Marine Twin Screw Air Compressor

Posted on

Model NO.: LGFD
Type: Twin-Screw Compressor
Casting Material: Cast Iron
Screw Material: Stainless Steel
Shaft Material: Stainless Steel
Discharge Pressure: 0.7-1MPa
Revolution: 950/1450rpm
Weight: 720-5300 Kg
Rate: 11-315kw
Color: Random
Trademark: NANJING COMPRESSOR
Transport Package: Polywood
Specification: 1.4m3/h-36m3/h
Origin: China
HS Code: 8414809090
Thank you for your interest in our pumps. Below is a brief introduction of this product. Feel free to contact us for any technical information or the latest price.

1. Brief Introduction of Marine Twin Screw Air Compressor
   The screw air compressor is a volumetric gas compression machine that uses rotary motion for operation. The compression process depends on changes in volume, achieved by rotating a pair of intermeshing rotors within the casing.
This type of compressor consists of a pair of parallel, intermeshing negative and positive screws, making it one of the most widely used in rotary compressors..
2. Structural Characteristics of Marine Twin Screw Air Compressor
     The basic structure of the screw air compressor includes a pair of intermeshing spiral rotors arranged in parallel. Typically, the rotor with convex teeth is called the Yang rotor or the sun screw, while the one with concave teeth is known as the negative rotor or the negative screw. The Yang rotor is connected to the prime mover, and the bearings at the end of the rotor are axially positioned, bearing the axial force in the compressor. Cylindrical roller bearings at both ends of the rotor provide radial positioning and support the radial forces within the compressor. At the ends of the compressor body, certain shapes and sizes of holes are opened—some for intake and others for exhaust.
Marine Twin Screw Air Compressor


SUCTION
      The working process of the screw air compressor involves the rotation of the rotors. When the rotors rotate, the space between the tooth grooves of the Yin and Yang rotors is largest when they reach the intake end wall. At this point, the space connects to the air inlet, allowing external air to be drawn into the groove of the Yin and Yang rotors. Once the groove is filled, the intake port moves away from the casing's inlet, sealing the air inside.

COMPRESS
      During the compression phase, the Yin and Yang rotors move past the suction end, closing the tooth tips with the casing. This prevents gas from escaping the tooth grooves. As the meshing surface moves toward the exhaust end, the gap between the meshing surface and the exhaust port decreases, increasing the pressure of the gas in the groove.

DISCHARGE
      In the discharge phase, the meshing end of the rotors reaches the exhaust port of the casing. The compressed gas begins to expel until the meshing surface of the tooth tip and groove moves to the exhaust end. At this point, the space between the meshing surface of the Yin and Yang rotors and the exhaust port is zero, completing the exhaust process. Simultaneously, the length of the groove between the meshing surface of the rotor and the air inlet of the casing is maximized, initiating the next intake cycle.
3. Main Advantages of Marine Twin Screw Air Compressor
    1. High reliability, fewer spare parts, and no wearing parts, ensuring reliable operation and long life. The design life of general screw machine heads is up to 30 years.
   2. Easy operation and maintenance with high automation level. Operators don't need long training to achieve unattended operation.
   3. Good power balance, no unbalanced inertia force. The machine can operate at high speed smoothly without foundation.
   4. Strong adaptability, with forced gas transmission characteristics. Volume flow is almost unaffected by exhaust pressure, maintaining high efficiency across a wide range of working conditions. It can be adapted to various working conditions without changing the compressor structure, making it easy for batch production.
  5. Multi-phase mixing, with actual clearance between rotor tooth surfaces, allowing liquid impact and compression of liquid gas, containing dust, easily polymerizing gas, etc.
   6. Spool valve flow regulation, no need to reverse flow, effectively reducing energy consumption.
The screw compressor is composed of a pair of parallel, intermeshing negative and positive screws, which is the most widely used in rotary compressor. There are two kinds of single screw and twin-screw, usually referred to as twin screw compressor.
 
4. Production Line:
MODEL Capacity Pressure Power Cooling External Dimension Weight Remark
 (m³/min)  (MPa) (kW) (mm) (kg)
LGFD-1.4/7-C 1.4 0.7 11 Air Cooling 1130×890×1170 720 CSPA11
LGFD-1.7/8-C 1.7 0.8 15 Air Cooling 1130×890×1170 740 CSPA15
LGFD-1.4/10-C 1.4 1 15 Air Cooling 1130×890×1170 740 CSPA15
LGFD-2.5/8-C 2.5 0.8 18.5 Air Cooling 1130×890×1170 750 CSPA18
LGFD-2.2/10-C 2.2 1 18.5 Air Cooling 1130×890×1170 760 CSPA18
LGFD-3/8-C 3 0.8 22 Air Cooling 1130×890×1170 760 CSPA22
LGFD-2.8/10-C 2.5 1 22 Air Cooling 1130×890×1170 760 CSPA22
LGFD-2.4/12-C 2.4 1.2 22 Air Cooling 1130×890×1170 760 CSPA22
LGFD-3.8/8-C Decoration Furniture Aluminium Profile

Decoration Furniture Aluminium Profile,Aluminium Extruded Profile For Furniture,Aluminium Extrusion Profile For Outdoor Furniture,Aluminium Furniture Profile Extrusion

Foshan Modern Copper & Aluminum Extrusion Co.,Ltd. , https://www.fsmodernaluminium.com