| 摘要 |
The invention provides a sealing structure which can prevent backpressure generation. The sealing structure is arranged in a sliding clearance between a cylinder body (1) and a rod (2) in hydraulic pneumatic equipment, and furthermore separates a high-pressure side and a low-pressure side, wherein the sealing structure comprises the components of: a first sealing groove (10A) which is annularly arranged along the circumferential direction of an outer circumferential surface of the rod (2); a second sealing groove (20A) which is annularly arranged along the circumferential direction of the outer circumferential surface of the rod (2) and is arranged at a position that is closer to the high-pressure side than the first sealing groove (10A); a first sealing component (10) which is accommodated in the first sealing groove (10A) and is used for blocking the sliding clearance between the cylinder body (1) and the rod (2); and a second sealing component (20) which is accommodated in the second sealing groove (20A) and is used for blocking the sliding clearance between the cylinder body (1) and the rod (2), wherein the second sealing component (20) comprises a through hole (234) of which one end is communicated with the high-pressure side, and the other end of the through hole is communicated with the low-pressure side. |
