Water-lubricating single screw compressor

Abstract

The invention provides a water-lubricating single screw compressor, belonging to a machine product. The single screw compressor comprises a screw and two star wheel mechanisms, wherein the screw and the two star wheel mechanisms are mutually meshed, and the two star wheel mechanisms are respectively arranged on the left and right sides of the screw in the opposite directions; cooling water is introduced into a compression cavity formed between the screw and the star wheel for cooling; the two ends of the shaft of the screw are provided with a plurality of reducing ring grooves; a plurality of labyrinth seal cavities are formed by matching the reducing ring grooves with a ring groove and a left bearing seat which correspond to a left sealing socket as well as a ring groove and a right bearing seat which correspond to a right sealing socket, and the seal cavities adjacent to the two ends of bearings are communicated with the outside; a plurality of through ports are formed at the lower part of the high-pressure end of an inner cylinder and are communicated with exhaust ports; a plurality of through ports are formed at the low-pressure end of the inner cylinder and are communicated with air inlets; the air inlets and the exhaust ports are formed at the top of a compressor body; and the axes of two water orifices formed at the top and bottom of the compressor body are vertical to the axis of the screw. The compressor provided by the invention has the advantages of compact structure, no vulnerable parts such as mechanical seals, sliding bearings and the like, long service life, low cost, high reliability and high efficiency, is easy to assemble and maintain and convenient for popularization, and utilizes water instead of oil so as to save resources.

Description

technical field [0001] The invention belongs to an oil-free water-lubricated single-screw compressor among general mechanical products, which can compress various gases and refrigerants such as air, oil and gas, and can be used as an expander for various gases such as steam. Background technique [0002] Oil-free water-lubricated single-screw compressors are widely used in chemical, pharmaceutical, textile, food, electronics, precision spraying, packaging, aerospace and other industries that require oil-free compressed air. Compared with the oil-free dry twin-screw compressor, it has the advantages of simple structure, reliable operation, low noise and low power consumption. The existing oil-free and water-lubricated single-screw compressor is equipped with two sets of mechanical seals on the screw shaft because of the need for water spraying in the inner cavity of the body, such as figure 1 Marks 1 and 2 in the middle; due to the symmetrical structure of the left and right...

AI Technical Summary

Problems solved by technology

The existing oil-free and water-lubricated single-screw compressor is equipped with two sets of mechanical seals on the screw shaft because of the need for water spraying in the inner cavity of the body, such as figure 1 Marks 1 and 2 in the middle; due to the symmetrical structure of the left and right star wheel mechanisms, the space for structural optimization and improvement is limited, and the two star wheel shafts are positioned by sliding bearings, as shown in figure 2 The sliding bearings are marked 3, 4, 5, and 6 in the middle, and the mechanical seal and sliding bearing are vulnerable parts, with a service life of about 8,000 hours. During the entire working life of the compressor, it needs to be transported to a professional factory several times. Overhaul increases the cost of operation and maintenance; at the same time, the system needs to provide a large amount of lubricating and cooling water during the use of mechanical seals and sliding bearings, which reduces the efficiency of the compressor, and also reduces the performance and reliability of the compressor

In addition, the casting of the integral stainless steel water-lubricated compressor main body is very difficult, and the yield is low, which leads to an increase in the cost of the whole machine

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