| 摘要 |
A density control system for a square baler that uses pneumatic pressure, namely an air spring ( 1 ) in conjunction with an air tank ( 13 ), to maintain constant pressure on bale tensioning rails ( 7 & 8 ) as material passes through. The air spring ( 1 ) expands and contracts to take up changes in the position of the bale tensioning rails because it is connected directly to the air tank ( 13 ) allowing air to flow freely in and out of the air spring ( 1 ). This holds the pneumatic pressure in the system nearly constant at all times-which is key to maintaining consistent bale density.
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