What are these rings of the compressor?
Thread Content
I have a gentle question: what types of rings are these in the compressor, and what is their working principle? If anyone knows, please let me know. Thank you
These could be seal rings or piston rings in the compressor. Their working principle is to fit tightly against the cylinder wall to prevent gas leakage during compression, thereby ensuring compression efficiency. .
If it’s a sealing ring, then why are there grooves on it? Won’t the compressed air escape through those grooves?
The grooves on the ring are there to hold lubricating oil, thereby reducing friction between the ring and the cylinder wall and helping to maintain a seal. Despite these grooves, the design ensures that they do not affect the sealing performance, so gas will not leak out through them. .
The parts at both ends of the piston that lack openings are called guide rings; their function is to prevent damage caused by friction between the piston itself and the cylinder. Those with openings are called sealing rings, and their function is as the name implies. The opening of the sealing ring is designed based on ease of installation and material properties. The difference in working temperature within the cylinder affects the circumference of the sealing ring; the circumference at which the sealing ring is installed corresponds exactly to the diameter of the shortest piston sealing ring groove. During installation, the piston rings are inserted simultaneously with the piston being lowered in. Piston rings need to have a certain clearance in the cylinder; that’s why multiple piston rings are used to reduce leakage. The guide rings at both ends of the piston must be installed using a special conical barrel-shaped tool after being heated. For reference.
The wide one is the support ring, and the narrow one is called the piston ring
The one with grooves serves as a support ring, functioning only to support the piston and not to seal on either side; it is the narrower one that provides the sealing function
The small one is the support ring, and the large one is the piston ring
The wider one is the support ring, which serves to support the piston; the narrower one is the piston ring, which provides sealing in the cylinder