| 摘要 |
PURPOSE:To maintain delivery constant irrespective of rotation of rotor, by containing a rotor rotatably in a tubular cam face of cam ring having adjustable eccentricity and varying the eccentricity of cam ring automatically in accordance to delivery of pump. CONSTITUTION:Upon rotation of rotor 23 in a tubular cam face 26, fluid is delivered through a delivery port 29 to produce differential pressure corresponding to delivery across an orifice 35 in a path 34. It will function on both end faces of piston 31 but it is low in low rotation area of rotor 23 to block sliding of piston 31 by spring 46 force. While under high rotation area, the piston 31 is moved to the right against the spring 46 by increased differential pressure to displace the cam ring 25 around a pin 27. Consequently eccentricity of cam ring 25 against rotor 23 is reduced to reduce delivery per unit rotation of pump. |
