Screw Air Compressor

Compressors are the most popular device for increasing gas pressure in industry. The screw compressor is a positive displacement compressor that is achieved by a pair of rotors. Use the suction valve to introduce gas into the compressor. It flows into the rotor and is finally released with pressure through the exhaust anix valve usa.

In this article about screw compressors, their structure, functional principles, classifications, strengths and weaknesses, and applications are analyzed in detail.

Working of the Screw Air Compressor

The working of the screw compressor is very similar to other types of the positive displacement compressors. These compressors screws to compress the air or gas. The principle is different when it comes to hydraulic systems, where the medium for compression is liquid – specifically self-lubrications oils. Pneumatic tool compressors use air or gas.

During the suction process, the suction valve of the screw compressor opens to draw in air from the atmosphere.

The air then flows through the space between the female and the male. The rotor pushes air through the narrow spaces that are created during controlled coupling and uncoupling.

When the air reaches the end of the rotor, the volume of the compression chamber continues to decrease. This decrease in volume leads to an increase in the system pressure.

The moving rotor creates an axial flow of air and the volume loss compresses the gas.

The air flow has a radial component and an axial component. In fact, air moves along an inclined path inside the rotor. At the end, the compressed air comes out of the outlet valve.

Components of Screw Compressors

  • Electric Motor
  • Discharge valve
  • Suction Valve
  • Bearings
  • Oil filters
  • Suction air filter at inlet
  • Screw elements or rotors
  • Compression Chamber 

1) Rotor

The screw compressor has an air end that compresses the air. These are precisely constructed and you need to understand your system well.

2) Compression Chamber 

• The screw is stored in a chamber where compression takes place.

• If the pressure in the cavity increases, the cavity must be airtight and operationally safe.

• The number of chambers depends on the type of compressor.

• There can be several numbers.

• The camera cannot shake.

• There is a lubrication system to limit the temperature rise in the cavity during processing.

3) Oil Filters

• Lubricating oil is used to lubricate the system.

• Compression systems require oil on rotating parts.

• Oil filters are used to filter contaminants in the oil.

4) Bearings

Screw compressors use roller bearings and ball bearings,

• The bearings are provided by turning the screws.

• Helps with the right balance.

• Reduce friction and reduce losses.

• It also helps to keep the screw turning freely.

5) Suction Valve

Compressors need to control the flow of air. This procedure uses a suction valve to control the flow of air.

• Works under pneumatic and electrical control. The suction valve is mounted on the air side.

• In compression mode, the suction valve is activated by the control unit.

• When the compressor stops suction, the valve closes to prevent air from escaping.

The suction valves should be checked as they can extend the life of the compressor.

Classification of Screw Air compressors

1) Oil Injected Screw compressors

In these compressors, the oil completely surrounds the rotor. Provides adequate lubrication and easy heat dissipation, but cannot be used when oil-free air is required.

The oil-filled screw compressor uses an oil filter to separate the oil from the air.

2) Oil-Free Screw Compressors

These compressors prohibit the use of oil for lubrication and cooling. They are well suited for low pressure applications and areas that require high purity air.

However, since there is no oil cooling, an intercooler must be used to prevent the air from overheating. In addition, the compression process can only be done in stages.

3) Twin-screw compressor

This screw compressor has two rotating screws. Depending on the drive and shape, these rotor screws can be male or female. Men have blades and another motor drives those rotors. The slaughter of females, on the other hand, has a furrow and is driven by the slaughter of males.