In the past, there was no oil lubrication modification and existing problems. The modification method (1) uses the original stuffing box to prevent the oil of the fuselage from being sucked into the cylinder due to the negative pressure. (2) The piston and the piston rod are unchanged, and the piston ring is changed into a plastic ring. Considering the support strength, the piston ring is correspondingly thickened and widened, and two plastic guide rings are added in the middle of the piston. The oiler is removed and the oil-free lubrication operation is achieved by the wear resistance and low grinding coefficient of the plastic. There are problems (1) using the original packing to seal and support, the oil retaining and sealing effect is poor, especially when the three-valve interface of the sealing ring is aligned in one line, the lubricating oil in the fuselage will be inhaled in a large amount. The cylinder is taken away with the pressure wind, so the fuel consumption is still large. (2) The piston and piston rod still use raw materials (cast iron material), and two plastic guide rings are added. The piston ring also needs to be thickened and widened. When the piston moves back and forth in the cylinder, the contact area between the piston ring and the guide ring and the inner wall of the cylinder is large, the frictional force naturally increases, the cylinder temperature is still high, the running noise of the machine is large, and the fault is more. (3) This modification method can still be used barely on the 20m/min pressure fan, but the machine's operating condition is worse after the change, and the maintenance amount is increased. Not to mention the use on machines of 40m/min and above.
2W series oil-free lubrication technology features (1) Reciprocating air compressor W series oil-free lubrication components are modified with oil lubrication machine, and its multi-channel oil-blocking device can reliably prevent lubricating oil from entering the cylinder. The self-developed composite material is used as the support body of the piston rod, and the strength thereof is large, wear-resisting and durable, and is more favorable for ensuring the sealing and oil-blocking effect of the stuffing box. (2) Both the piston and the piston rod are changed to aluminum alloy material, and the two piston rings use composite products, the width of which is correspondingly narrowed, the machine load is light, and the running sound is good. (3) It can be directly modified on the machine, without the need to move the foundation, the moving fuselage and the original piping, the construction period is short, and the production is hardly affected. (4) The use of the new machine can save more than 10,000 yuan in purchase cost.
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