叶片式输油泵的原理是什么?如图,实在是看不懂.

Leaf-centrifugal pump is a typical fluid machinery products.Its characteristics:high-speed,small size,light weight,high efficiency,flow,simple structure,performance,smooth,easy operation and maintenance.In the national economy in many sectors,centrifugal pumps have played an important role.
According to the pump given the technical indicators,using data and information and experience in the design of a large number of examples,the subject of the requirements of section struts multi-stage centrifugal pumps to clear the overall design.One of the impeller hydraulic design is one of the most critical design,the reference design some of the good performance of water pumps,select the appropriate factor to achieve good performance of the water; balance installations in balance disc,the device is simple and reliable,better able to Balance axial force,sealing devices used blankets laps,economical and practical.Finally,the centrifugal pump some parts of the check,including the key slot,spindle,tighten bolts and other key parts and components.In addition,the design of large size have a cushion to ensure that the centrifugal pump with a longer service life and greater room for improvement.
Keywords centrifugal pump; impeller; balance disc; hydraulic design; Checking