| 摘要 |
A reversible pneumatic vane motor comprises a stator housing (10) with a pressure air inlet passage (11) and an exhaust air outlet passage (15), a cylinder (12) supported in the stator housing (10), a vane carrying rotor (16) rotatable in the cylinder (12) and forming a clearance seal portion (37) with the cylinder (12), air communication ports (36,19) located at opposite sides of the seal portion (37) and intended for supplying motive pressure air or scavanging exhaust air from the cylinder (12), a primary outlet (20) diametrically opposite the clearance seal portion (37), and a directional valve (21) for connecting alternatively the air communication ports (36,19) to the pressure air inlet passage (15) and the exhaust air outlet passage (15). There are also provided auxiliary outlet ports (28,29) which are located between the primary outlet (20) and each one of the air communication ports (36,19), and the directional valve (21) comprises control parts (32,33) for opening up and closing, respectively, communication between the auxiliary outlet ports (28,29) and the atmosphere via the exhaust air outlet passage (15). |
