1. Wear of the fitting parts of the piston, piston ring and cylinder wall. After wear, the fitting gap between them increases, and the compressed air leaks from the fitting parts. From the surface Resulting in insufficient cylinder pressure.
2. At the joint surface of the cylinder gasket, cylinder head, and cylinder block, due to uneven warping of the joint surface or damage to the cylinder gasket, air will leak outward from the joint surface.
3. The sealing cone surface of the valve and valve seat ring is worn or ablated, causing the valve to not be tightly sealed and causing air leakage. Secondly, the valve guide is worn and the clearance is too large, the valve spring has insufficient elasticity or the valve clearance is improperly adjusted, which will also cause the valve to not close tightly and cause air leakage.
When it comes to the shortcomings of pneumatic components, they can be summarized into three aspects:
First, the compressibility of air makes the cylinder's operating speed susceptible to changes in load. However, this defect can be overcome by using gas-liquid linkage.
Secondly, when the cylinder moves at low speed, friction accounts for a large proportion of thrust. The low-speed stability of the cylinderis not as good as that of the hydraulic cylinder.
Thirdly, although the output force of the cylinder can meet the work requirements in many applications, its output force is smaller than that of the hydraulic cylinder.
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