空气压缩机, 无油润滑, 摇摆活塞, 气缸偏置, 活塞侧隙进气

This paper proposed a new type wobble piston oil-free air compressor, in which the side gap between piston and cylinder, formed by the piston swing to the cylinder, was used as inlet port for the compressor and the cavity of crankcase was used as the intake silencer.The new compressor has abandoned damageable part suction reed valve and expanded the volume of the intake muffler, so that the compressor has increased trouble-free working life by about 11% and reduced noise by about 5-6dB(A),compared with traditional models.The results show that when the cylinder offsets appropriately toward compression stroke side, and supplement the larger values of crank radius-connecting rod length ratio λ at the same time, suction can be realized through the side gap,thus ensuring the tightness of the seal ring toward the cylinder on the compression stroke and reducing the volume of the compressor. However, in order to decrease the impact strength of the piston to the cylinder, it is necessary to set a buffer device,and to strengthen the cooling and insulating for connecting rod to reduce the temperature rise of bearing.

air compressor, oil free, wobble piston, cylinder offset, suction through side gap