无油压缩机指的是在压缩机汽缸内不用润滑油的压缩机。全无油压缩机曲轴箱为干式结构，其连杆大、小孔、曲轴前后主轴承一般均采用双端口密封的含脂球轴承。由于在运行中，无润滑油与压缩气源接触，因此排出的气体绝不含油气，故深受用户的欢迎。但密封于轴承内的润滑脂会在长期的运转中由于温度升高而使油脂发生蒸发和氧化分解，...
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