Large reciprocating type oil scraping ring assembly of process compressor

Abstract

The invention provides a large reciprocating type oil scraping ring assembly of a process compressor. The large reciprocating type oil scraping ring assembly comprises a compressor body, wherein a piston rod is arranged in the compressor body; a first oil scraping ring and a second oil scraping ring are arranged on the piston rod; an oil scraping box is arranged at the periphery of each oil scraping ring; a pulsation sealing ring is arranged at one side of the second oil scraping ring; one side, away from the first oil scraping ring, of the second oil scraping ring is equipped with an oil seal; and a dynamic sealing ring is arranged on a position, at one side away from the oil scraping rings of the oil seal, of the piston rod. A nitrogen gas inlet and a nitrogen gas outlet are formed in the surface of the dynamic sealing ring; the nitrogen gas inlet and the nitrogen gas outlet correspond to each other in position; and a distance from the nitrogen gas inlet to the center point of the dynamic sealing ring is equal to that from the nitrogen gas outlet to the center point of the dynamic sealing ring. The large reciprocating type oil scraping ring assembly strengthens the oil scraping effect, is relatively less in leaked amount of lubricating oil, greatly reduces resource waste and process gas pollution, caused by leakage of the lubricating oil, and is very practical.

Description

technical field [0001] The invention relates to a reciprocating process compressor, in particular to an oil scraping ring assembly of a large reciprocating process compressor. Background technique [0002] Domestic large-scale reciprocating process compressors are designed and produced according to the API618 standard of the American Petroleum Institute. The large leakage of the oil scraper ring is mainly caused by two reasons: the number of oil scraper ring groups is too small, and the oil scraping effect is not good; the packing assembly leaks air , the material gas enters the oil scraper ring assembly and the lubricating oil reacts to form a polymer, which leads to the failure of the oil scraper ring, so a large reciprocating process compressor oil scraper ring assembly is needed to solve these problems. Contents of the invention [0003] Aiming at the deficiencies in the existing technology, the invention provides a large-scale reciprocating process compressor oil scra...

AI Technical Summary

Problems solved by technology

[0002] Domestic large-scale reciprocating process compressors are designed and produced according to the API618 standard of the American Petroleum Institute. The large leakage of the oil scraper ring is mainly caused by two reasons: the number of oil scraper ring groups is too small, and the oil scraping effect is not good; the packing assembly leaks air , the material gas enters the oil scraper ring assembly and the lubricating oil reacts to form a polymer, which leads to the failure of the oil scraper ring, so a large reciprocating process compressor oil scraper ring assembly is needed to solve these problems

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