| 摘要 |
FIELD: machine building. ^ SUBSTANCE: air with specified pressure Pspecified is supplied simultaneously to both control cavities of pneumatic actuator, and leakages Q1 and Q2 are recorded in external seals from the first and the second cavities to atmosphere; then, air is supplied alternatively with pressure Pspecified to the first cavity, and the second cavity is connected to atmosphere and vice versa. Leakages Q12 and Q21 are recorded. Leakages in internal seal from the first cavity to the second one Q' and from the second one to the first one Q" are determined by the following formulae: Q' = Q12-Q1 and Q" = Q21-Q2, where: Q' - air leakages in internal seal from cavity 1 to cavity 2; Q12 - sum of external leakages from cavity 1 to atmosphere and internal leakages from cavity 1 to cavity 2 (when cavity 2 is connected to atmosphere); Q1 - external air leaks to atmosphere from cavity 1; Q" - air leakages in internal seal from cavity 2 to cavity 1; Q21 - sum of external leakages from cavity 2 to atmosphere and internal leakages from cavity 2 to cavity 1 (when cavity 1 is connected to atmosphere); Q2 - external air leakages to atmosphere from cavity 2. ^ EFFECT: leakages are rather accurately determined in each of the seals of pneumatic actuator. ^ 1 dwg |
