Oil-cooled screw air compressor coaxial with motor

Abstract

The invention relates to an oil-cooled screw air compressor coaxial with a motor, which comprises an air compressor host and a circulating oil system. The tail part of the air compressor host is provided with a machine body bracket; a motor shell is arranged on the machine body bracket in a centering mode; the motor shell is provided with a cooling interlayer; the inner wall of the motor shell is provided with a motor stator; a motor rotor is arranged in the motor shell; the motor rotor is fastened with a driving shaft of the air compressor host so as to form one whole body; the cooling interlayer on the motor shell is communicated with the circulating oil system by an oil pipe. According to the invention, the rotor of the motor is arranged on the driving shaft of the air compressor host, so that the transmission efficiency of the motor achieves 100 percent; the oil-cooled screw air compressor fulfills the aim of integrating the motor with the air compressor host into one whole body, so that the motor is not provided with a bearing, fault points of the motor are eliminated and no maintenance of the motor is implemented.

Description

technical field [0001] The invention relates to a screw air compressor. Background technique [0002] Energy saving and emission reduction is a long-term goal in the process of my country's national economic development, and it is also a very important part to reduce the noise of the unit and improve the reliability of the product. At present, the air compressor industry basically uses an air-cooled motor to drive the main engine of the air compressor, and the motor and the main engine are integrated; for the direct connection, it is connected through the center bracket and the coupling. It is guaranteed by the manufacturing accuracy of the center bracket and the elastic compensation of the coupling, which not only complicates the assembly and high cost, but also reduces the transmission efficiency and affects the reliability of the product. The air-cooled motor uses the airflow generated by its own fan to dissipate the heat generated during the excitation process, and the ...

AI Technical Summary

Problems solved by technology

At present, the air compressor industry basically uses an air-cooled motor to drive the main engine of the air compressor, and the motor and the main engine are integrated; for the direct connection, it is connected through the center bracket and the coupling. It is guaranteed by the manufacturing accuracy of the center bracket and the elastic compensation of the coupling, which not only complicates the assembly and high cost, but also reduces the transmission efficiency and affects the reliability of the product

The air-cooled motor uses the airflow generated by its own fan to dissipate the heat generated during the excitation process, and the fan speed is synchronized with the motor, so that not only the noise caused by the air flow cannot be avoided, but also the motor bearings will also generate relatively large noise; For variable frequency screw air compressors, due to the limitation of cooling air volume, the unit speed should not be too low, thus limiting the frequency adjustment range of the unit

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