The Research On The Parts Of The Four-cylinder Radial Reciprocating Piston Pump's Power End

With the development of industrial technology and the era of knowledge-based economy coming, the modern industrial equipments display highly automated, integrated and intelligent trend. Industrial production has Raising higher and higher requirements to performance of the modern equipment. Ordinary and conventional mechanical equipment already can not fully meet the requirements, the piston pump is also facing serious challenges as an important part of the industrial equipment. This paper is committed to design and develop a new four-cylinder radial piston pump and the pump power end uses micro-adjustable circular curved sliding mechanism to replace the conventional crank linkage and cam mechanism. With the many advantages, such as modern design, simple structure, reliable performance, smooth running, low power, low noise, convenient assembly and disassembly and wide application.A series of research and discussion is done in this article, based on radial piston reciprocating pump power end. Investigated the structural principle and disadvantages of the conventional crank linkage and the conventional cam mechanism piston pump and on this basis, developed a new four-cylinder radial piston pump, at that time put two design program forward of the power end. To elaborate on its working principle and structure. Designing and analyzing structural of the key components to improve the performance of the power end.Using Pro/E to establish the power end's3D model of two schemes and analyzing the strengths and weaknesses of the two programs. Selected the advantage program and imported3D model to Adams and established the virtual prototype of the reciprocating pump power end model. To simulate and calculate pump power end of the reciprocating pump after added the boundary conditions and driving. To draw the kinematics and kinetic parameters'curve of the key components of the power end and which can observe kinematic characteristics of the piston pump quickly and easily.Combined with the results of theoretical calculation and multi-body dynamics simulation to comparative and analyze, with this, can provide a theoretical basis for the pump design and improvement. To make structure, dimensions and balancing design of the key components of the pump power end——Eccentric spindle could reduce inertia force effectively which is caused by the centroid of the spindle components and its center of rotation axis could not share a same line. Made a structural analysis and fatigue failure analysis of eccentric spindle with ANSYS and researched stress and strain according to two kinds of analysis, while analyzed the oscillation of the eccentric spindle, and to carry the modal analysis out which considers prestressed influence. To lists the many steps natural frequencies and to examine the stress and strain for preventing the eccentric spindle is damaged when the resonance happened.The innovation of this paper is:1. The new radial piston pump power end used micro-adjustable circular curved sliding mechanism to replace the conventional crank linkage and conventional cam mechanism which Contains advantages of the simple structure of cam mechanism and the carrying capacity of the crank.2. Designed the connection of the piston components to be rotating spherical surface can reduce the moment of arc slider effectively. Used new restoration mechanism to replace the traditional spring and pump restoration mechanism, to make restoration become simple and reliable.