Novel water-cooling semi-sealed helical-lobe compressor

Abstract

The invention discloses a novel water-cooling semi-sealed helical-lobe compressor. A machine body (10) is internally provided with a male rotor (1) and a female rotor (2) which are mutually engaged with each other; and two ends of the machine body are connected with an air suction end seat (9) and an air exhaust end seat (11). The novel water-cooling semi-sealed helical-lobe compressor is characterized in that two sides of the male rotor (1) and the female rotor (2) are respectively connected with sliding bearings (3); one side, which is adjacent to an air suction end, of the male rotor (1) is connected with a balance piston (4); one side, which is adjacent to an air exhaust end, of the male rotor (1) and one side, which is adjacent to the air exhaust end, of the female rotor (2) are respectively connected with thrust bearings (7); compressor slide valves (13) are arranged below the male rotor (1) and the female rotor (2) in the machine body (10) and the compressor slide valves (13) are connected with an energy indicator (6); the machine body (10) is connected with a water sleeve (8) through a middle body (12) and the water sleeve (8) is internally provided with a motor (5); the water sleeve (8) is provided with a water inlet (16) and a water outlet (17), the male rotor (1) is connected with the motor (5) through a shaft coupler (15) and the middle body (12) is provided with a junction box (14). The novel water-cooling semi-sealed helical-lobe compressor has the advantages that the service life of the bearings is longer and the reliability is higher; and the current load position of the compressor can be really indicated, and the efficiency is very high.

Description

Technical field [0001] The invention relates to a novel water-cooled semi-hermetic screw compressor. Specifically, it is a water-cooled semi-hermetic screw compressor with sliding bearings and balanced pistons and capable of energy indication. Background technique [0002] Semi-hermetic screw compressors are common devices in the compressor field. Its function is to compress the working fluid from a lower suction pressure to a higher discharge pressure. Common semi-hermetic screw compressors use rolling bearings to withstand radial forces, bearing life is low, reliability is poor, and need to be replaced frequently; and without balancing pistons, all axial forces are borne by thrust bearings, resulting in too short thrust bearing life and reduced compression The life and stability of the whole machine; there is no energy indicator, and it can only be judged by the motor current. Due to the continuous change of working conditions and the current, the load position indication i...

AI Technical Summary

Problems solved by technology

Common semi-hermetic screw compressors use rolling bearings to bear the radial force, the bearing life is low, the reliability is poor, and it needs to be replaced frequently; and there is no balance piston, the axial force is all borne by the thrust bearing, resulting in a short life of the thrust bearing and reduced compression The life and stability of the whole machine; there is no energy indicator, which can only be judged by the motor current. Due to the continuous change of working conditions and current changes, the load indicator is very inaccurate, and the output load is mostly the estimated load.

The motor is cooled by the suction working fluid, and the motor heats the working fluid, which reduces the density of the suction gas, reduces the mass flow rate, and reduces the efficiency of the compressor.

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