| 摘要 |
<p>PURPOSE:To prevent vibration, noise, etc., from occurring owing to pulsation without lowering pump efficiency. CONSTITUTION:Pressurized oil remaining in a cylinder 8 on an top dead center side is fed into a cylinder 8 on a bottom dead center side through a second notch groove 20, an intercommunicating path 21, and a first notch groove 19, and released into a casing 1 through a small hole 22. Accordingly pressure inside the cylinder 8 on the bottom dead center side is increased to suppress the pressurized oil inside a discharge pump 16 from flowing in, and the pressure inside the cylinder 8 on the top dead center side is reduced surely to prevent the pressurized oil inside the cylinder 8 on the top dead center side from flowing reversely into a suction port 15. Also the sliding parts, etc., inside the casing 1 can be lubricated by releasing the pressurized oil inside the cylinder 8 on the top dead center side into the casing 1.</p> |
