Fully-closed horizontal oil-injection scroll compressor

Abstract

The invention discloses a fully-closed horizontal oil-injection scroll compressor, which is an oil circulating system which can guarantee tightness of the compressor and lubrication of a bearing stress surface and the like and unifies lubrication of the bearing stress surface and oil-injection cooing of a compression cavity by a pressure difference at the same time. Under the action of the pressure difference, lubricating oil enters a central oil hole of a rotation shaft through an oil injection pipe, and then is supplied to the position to be lubricated through an oil hole, an oil guide channel inside a dynamic scroll, and other mechanisms, and finally falls back into an oil pool at the bottom of a shell under the action of the gravity after lubrication. Part of air inlet guide pipes with a porous structure are immersed into the oil pool at the bottom of the shell, and the lubricating oil enters the air inlet guide pipe through small holes, and is carried into the compression chamber, and the mixture of the lubricating oil and gas is discharged after the lubricating oil cools the compression chamber. After the mixture is subjected to gas-oil separation and the lubricating oil is cooled, the lubricating oil is injected into the central oil hole of the rotation shaft by the oil injection pipe for recycling. As the compression chamber is internally cooled by injecting oil on the premise of a fully-closed structure, the fully-closed horizontal oil-injection scroll compressor is particularly suitable for gases (such as natural gas, helium gas and the like) which have strict requirements on compression tightness and of which compression heat is high due to high isentropic indexes.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and relates to a fully-enclosed horizontal oil-injection scroll compressor, in particular to a fully-enclosed horizontal oil-injection scroll compressor for an associated gas recovery device in an oil field. Background technique [0002] Scroll compressors have the advantages of small size, light weight, simple structure, few wearing parts, high operational reliability, small clearance volume, and high efficiency, and have been widely used in the field of refrigeration. In view of the above advantages and the relatively mature scroll compression technology, the use of scroll compressor technology to increase the pressure of natural gas, helium and other gases to achieve high-efficiency compression has been highly concerned. [0003] The refrigerant and lubricating oil of ordinary scroll refrigeration compressors have good mutual solubility. When the refrigerant enters the scroll compression chamber...

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Problems solved by technology

[0011] The invention aims to solve the problem of internal cooling of the oil injection in the compression chamber when the scroll compressor compresses gas with strict airtightness and high isentropic index

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