Airtight aerobic?fermentation cylinder area lubricating structure's end cover fixing device

The utility model discloses an airtight aerobic?fermentation cylinder area lubricating structure's end cover fixing device, including the barrel, the barrel includes that the feeding fix the fixed end cover of end cover, middle rotary cylinder and the ejection of compact, and the fixed end cover of feeding and the ejection of compact are fixed the end cover and is passed through end cover fixing device with middle rotary cylinder respectively and is connected, and end cover fixing device includes rotary fixing structure and rotation support structure, rotary fixing structure include middle rotary cylinder both ends insert respectively establish the fixed end cover of feeding and the fixed end cover of the ejection of compact in, middle rotary cylinder 's outer wall respectively and the fixed end cover of feeding and the ejection of compact fix and be equipped with outer thrust ball bearing between the inner wall of end cover, the fixed end cover of feeding and ejection of compact stiff end are covered and are