摘  要

    液压泵作为液压系统的动力装置，越来越受到人们的关注，因为其工作的可靠性将直接影响整个液压系统的性能。广泛应用于冶金，矿山，锻压，注塑，造船，重型机械和其他设备。但在实际生产中是没有流量脉动的一个好的解决方案，刚性冲击和柔性问题。问题是流量脉动的一个好办法，刚性和柔性冲击设计平衡式径向柱塞泵。通过泵的设计适应现代生产设计2gh30-42双螺杆泵在结构功能的高要求。
螺杆泵是一种容积式转子泵，它是由密封腔体积变化的螺杆和衬套的吸入和排出液体形成。根据螺杆泵螺杆数分为单螺杆泵，双螺杆泵，三和五。螺杆泵的特点是平稳流动，压力脉动小，有自吸能力，噪音低，效率高，工作可靠、寿命长；其突出的优点是传输介质，没有形成一个旋涡，不到中等粘度敏感，可用于输送高粘度介质。双螺杆泵是由驱动轴啮合的螺旋套与泵体形成一密封室套房或李宁量恒定，介质与螺旋轴的旋转分别传送到泵体中，两者结合在一起，最后传递到泵的出口，从而达到泵目的。
本设计是根据对2gh30-42双螺杆泵设计完成的设计参数，主要包括齿轮的结构设计及螺杆泵。参数的确定，并检查投影图，采用泵的结构设计，绘制装配图和零件图，并进行强度校核计算轴。
 
关键词：螺杆泵，双螺杆泵设计，结构设计
 
 

Abstract

The hydraulic pump as the power device of the hydraulic system, more and more attention, because of its working reliability will directly influence the performance of the whole hydraulic system. Widely used in metallurgy, mining, forging, injection molding, shipbuilding, heavy machinery and other equipment. But in actual production is not a good solution of flow pulsation, rigid and flexible impact problem. The problemis a good solution to the flow pulsation, the rigid and flexible impactdesign balanced radial piston pump can. Through the design of the pumpto adapt to modern production design the high requirements of 2GH30-42 twin screw pump in the structure function.
Screw pump is a positive displacement type rotor pump, which is the volume change by the sealing cavity formed by screw and bushing to the suction and discharge of liquid. According to the number of the screw pump screw is divided into single screw pump, double, three and five screw pump. The characteristics of screw pump is smooth flow, pressure pulsation is small, there is self absorption capacity, low noise, high efficiency, long service life, reliable work; and its outstanding advantageis the transmission medium without forming a vortex, is not sensitive to the medium viscosity, can be used for conveying high viscosity medium.Double screw pump is composed of a driven shaft meshed helical sleeveand the pump body to form a seal chamber suite or lining a volumeconstant, dielectric with rotation of screw shaft are respectively sent tothe middle of a pump body, the two together, finally delivered to the outlet of the pump, so as to achieve the purpose of pump.
This design is given according to the design parameters of the completion of 2GH30-42 double screw pump design, mainly includes thestructure design of gear pump, screw. Parameters are confirmed, and check the projection drawing, adopt the structure design of pump,drawing the assembly drawing and parts diagram, and the axle of thestrength check calculation.
 
Keywords:  screw pump, double screw pump design, structure design