Double stage double acting reciprocating air/gas compressor | Compressor animation (w english subs)

Introduction

In this section, NK Jain introduces himself and the topic of the video.

• NK Jain introduces himself as a representative of SkillOnTech.com.

• The video will cover double stage double acting reciprocating air or gas compressors made by Howden.

• Howden is a well-known manufacturer of air compressors.

Understanding Double Stage Double Acting Reciprocating Compressors

This section covers the internal components of a double stage double acting reciprocating compressor and how they function.

• The video will demonstrate the internal components of a Howden C series gas compressor.

• The crank case and crank shaft are shown, with an oil pump installed for lubrication.

• A flywheel is installed on one end of the crankshaft, which is rotated through a prime mover such as an electric motor or diesel engine.

• The crosshead connects the connecting rod and piston rod to each other, transferring oscillating motion to reciprocating motion.

• The low pressure cylinder (LP cylinder) is where air or gas is first sucked in, pressurized, and discharged to second stage suction.

• Two main bearings support the crankshaft and are forced lubricated. General bearings are also provided which are white metal lined.

• Big end bearings connect the connecting rod with the crankshaft while small end bearings connect it with crosshead guide.

• An adjustable crosshead shoe can be replaced after wear and tear.

• A stuffing box with gland packings inside prevents leakage from pressurized air along piston rod to atmosphere.

Gland Packings

This section explains why pure teflon gland packings are used in compressors.

• Five gland packings consisting of pure teflon are provided in the stuffing box to prevent leakage of pressurized air along piston rod to atmosphere.

• Pure teflon is used so that it will not give any indentation or scratch on the piston rod. If hard material packing is used, then they can make indentation or scratches on the piston rod.

Overview of Reciprocating Compressor

In this section, the instructor provides an overview of a reciprocating compressor and explains its working principle.

Working Principle of Reciprocating Compressor

• The piston moves to and fro in the cylinder.

• The top side of the piston is called top dead center, and the crank side is called bottom dead center.

• Clearance is provided on both sides to allow for compression and expansion of gases.

• Two suction valves are provided on the top side, while two delivery valves are located at the bottom.

• Air is sucked in through one valve during one stroke and compressed before being discharged through another valve during the next stroke.

Double Stage Double Acting Reciprocating Compressor

In this section, the instructor explains how double stage double acting reciprocating compressors work.

Features of Double Stage Double Acting Reciprocating Compressor

• These compressors are generally horizontal axis and balanced opposed.

• The moments produced by moving pistons are opposed by each other.

Clearance Space Provided in Piston Cylinder

In this section, the instructor explains why clearance space is provided in a reciprocating compressor's piston cylinder.

Importance of Clearance Space

• A clearance space is provided to ensure that the piston does not touch the end cover of the cylinder.

Conclusion

In this section, the instructor concludes by thanking viewers for watching and encouraging them to subscribe to their channel.

Final Thoughts

• Viewers are encouraged to subscribe to their channel.

• Feedback from viewers is welcomed for improvement and new videos.