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
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1. Brief introduction of Marine Twin Screw Air Compressor
   The screw air compressor is an air compressor which is a volumetric gas compression machine with working volume for rotary motion. The compression of gas depends on the change of volume, and the change of volume is achieved by turning a pair of rotors of the compressor in the casing.
The screw compressor is composed of a pair of parallel, intermeshing negative and positive screws, which is the most widely used in rotary compressor.
2. Structural characteristics of Marine Twin Screw Air Compressor
     The basic structure of the screw air compressor: in the compressor body, a pair of intermeshing spiral rotors are arranged in parallel, usually the rotor with a convex tooth outside the circle, called the Yang rotor or the sun screw. The rotor with a concave tooth in the circle is called a negative rotor or a negative screw. The General Yang rotor is connected with the original motive, and the last pair of bearings on the rotor rotated by the Yang rotor is axially positioned and the axial force in the compressor is subjected to the axial force. The cylindrical roller bearings at both ends of the rotor enable the rotor to be positioned in a radial direction and bear the radial force in the compressor. At the two ends of the compressor body, a certain shape and size hole is opened. One is for inhalation, the other is air inlet, and the other is called exhaust port.
Marine Twin Screw Air Compressor


SUCTION
      The working process of the screw air compressor is analyzed in detail. When the rotor is rotated, the space of the tooth groove of the Yin and Yang rotor is the largest when it turns to the opening of the intake end wall. At this time, the space of the rotor tooth groove is connected with the air inlet, because the gas of the tooth groove in the exhaust is completely discharged, and the tooth groove is in a vacuum state when the exhaust gas is completed. When transferred to the intake port, the external gas is sucked into the groove of the Yin Yang rotor. When the gas is full of tooth grooves, the inlet end of the rotor is turned away from the air inlet of the casing, and the gas in the groove is closed.

COMPRESS
       The compression process of the working process of the screw air compressor is analyzed in detail: when the Yin and Yang rotor is at the end of the suction, the tooth tip of the Yin and Yang rotor will be closed with the casing, and the gas is no longer outflow in the tooth groove. The meshing surface gradually moves to the exhaust end. The gap between the meshing surface and the exhaust port is gradually smaller, and the gas in the groove is increased by compression pressure.

DISCHARGE
      The exhausting process of the working process of the screw air compressor is analyzed in detail: when the meshing end of the rotor is transferred to the exhaust port of the machine shell, the compressed gas begins to expel until the meshing surface of the tooth tip and the tooth groove is moved to the exhaust end. At this time, the space between the meshing surface of the Yin and Yang rotor and the exhaust port of the engine shell is 0, that is to complete the exhaust process. At the same time, the length of the groove between the meshing surface of the rotor and the air inlet of the casing reaches the longest, and the intake process is carried out again.
3. The Main advantage of Marine Twin Screw Air Compressor
    1. high reliability, less spare parts and no wearing parts, so it has reliable operation and long life. The design life of general screw machine heads is up to 30 years.
   2. the operation and maintenance are convenient and the automation level is high. Operators need not undergo long time professional training to achieve unattended operation.
   3., the power balance is good, and there is no unbalanced inertia force. The machine can work at high speed and smoothly without foundation.
   4. strong adaptability, with the characteristics of forced gas transmission, volume flow is almost free from the influence of exhaust pressure, and can maintain high efficiency in a wide range of working conditions. In the case of no change in the compressor structure, it is suitable for a variety of working conditions, so it is easy to fix the batch production.
  5. multi phase mixing, the rotor tooth surface between the actual clearance, so the liquid impact, can be compressed to liquid gas, containing dust gas, easy to polymerize gas and so on.
   6. spool valve flow regulation, no need to reverse flow, can effectively reduce 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 3.8 0.8 30 air cooling 1180×1100×1470 950 CSPA30
LGFD-4.5/8-C 4.5 0.8 30 air cooling 1180×1100×1470 950 CSPA30
LGFD-3.8/10-C 3.8 1 30 air cooling 1180×1100×1470 950 CSPA30
LGFD-6/8-C 6 0.8 37 air cooling 1180×1100×1470 1000 CSPA37
LGFD-4.5/10-C 4.5 1 37 air cooling 1180×1100×1470 1000 CSPA37
LGFD-6.5/8-C 6.5 0.8 45 air cooling 1180×1100×1470 1050 CSPA45
LGFD-5.5/10-C 5.5 1 45 air cooling 1180×1100×1470 1050 CSPA45
LGFD-4.9/12-C 4.9 1.2 45 air cooling 1180×1100×1470 1050 CSPA45
SDW75-C 12 0.8 75 water cooling 2094×1440×1570 2000 CSDW75
CSDW90 12 1 90 water cooling 2094×1440×1570 2100  
CSDW90 14 0.8 90 water cooling 2094×1440×1570 2100  
CSDW110 16.5 0.8 110 water cooling 2600×1550×1600 2600  
SDW132-C 16.5 1 132 water cooling 2600×1550×1600 2800 CSDW132
CSDW132 20 0.8 132 water cooling 2600×1550×1600 2600  
CSDW160 20 1 160 water cooling 2600×1550×1600 2800  
CSDW200 30 0.8 200 water cooling 3500×2000×2000 4500  
CSDW250 30 1 250 water cooling 3500×2000×2000 5000  
CSDW250 36 0.8 250 water cooling 3500×2000×2000 4700  
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