徑向往復(fù)泵動力端部件的研究
[Abstract]:With the rapid development of science and technology, the automation level of modern equipment is becoming higher and higher. This paper is devoted to the development of a new four-cylinder radial plunger reciprocating pump. The power end of the pump is designed with a new design and simple and compact structure, which replaces the traditional cam mechanism and crank linkage mechanism by using a single crank and double slip mechanism in the power end of the pump. Compared with the traditional pump, it has a series of characteristics such as small volume, low noise, energy saving, beautiful appearance, stable operation, reliable performance, convenient single disassembly and maintenance, wide range of use, etc. Taking the power end of radial plunger reciprocating pump as the research object, this paper discusses the structure principle and deficiency of the traditional cam mechanism reciprocating pump. On this basis, a new type of four-cylinder radial plunger reciprocating pump is designed and its working principle and structure scheme are designed, and the key parts of the power end are analyzed and studied and the structure is improved. The 3D model of the pump body is established by using the 3D modeling software Prop / E, which lays a foundation for further simulation analysis and structural improvement. The virtual prototype of the power end of the pump is established, and the kinematics and dynamic parameters of the parts of the power end are obtained conveniently and quickly by using the Admas software to simulate the power end of the pump. The motion characteristics of four-cylinder radial plunger reciprocating pump are displayed intuitively. The result of dynamic simulation provides a reliable basis for the further design and improvement of four cylinder radial plunger reciprocating pump. The structural dimension design and dynamic balance design of the eccentric shaft of the key parts at the power end are carried out. The strength of the eccentric shaft is checked and calculated by finite element analysis of the shaft body. The uneven distribution of the load on the slide and the load on the slide caused by the torque is studied. The center line of the plunger of the four plunger reciprocating bodies arranged in the original radial symmetry is biased by a certain distance relative to the reverse direction of the main axisymmetric line rotating around the main axis. It greatly reduces the torque on the skateboard and the bending stress caused by the torsion on the skateboard, improves the uneven distribution of the load on the skateboard, and effectively reduces the wear of the skateboard. The innovations of this paper are as follows: 1. The new plunger reciprocating pump adopts single and double slip mechanism to replace the traditional cam mechanism and crank linkage mechanism, which has the bearing capacity of crank and connecting rod mechanism. It also has the simple structure form of cam mechanism. 2. This paper presents a design scheme that the center line of the piston of the four piston reciprocating bodies arranged in the original radial symmetry is offset by a certain distance relative to the reverse direction of the rotation of the main axisymmetric line around the main axis of the reciprocating body. It greatly reduces the torque on the skateboard and the uneven distribution of the load caused by the torque on the skateboard, and effectively improves the reliability of the friction pair of the skateboard.
【學(xué)位授予單位】:武漢理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2011
【分類號】:TH32
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