Powder lubricator of spinning machine rubber ring

The utility model discloses a powder lubricator for aprons of spinning machines. The powder lubricator 5 includes a hollow tube with both ends sealed, the hollow tube is filled with lubricating powder 54, the tube is horizontally placed on the inside ring of each hollow apron 1 of the bearing seat of the mid roller 1. The tube has powder outlet corresponding to the position of each apron 1. Such design can reduce sliding friction force between the apron 1 and metal parts, make revolving of the apron 1 smooth and stable, eliminate torsion vibration of the mid roller 2, reduce number of spindles without bobbin, improve quality of yarn evenness, improve spin quality, reduce energy consumption, reduce production cost, and greatly improve production efficiency of spinning process. The chosen lubricating powder 54 is cheap with low friction coefficient. The lubricator is featured with simple structure, convenient installation and obvious effect of load reduction. The utility model can be widely used in draft mechanism of spinning machines or roving machines.