1.丝杆在机械机构中,丝杆是最重要的机构之一,丝杆种类繁多,其中应用最广的是滑动丝杆,结构简单,加工方便。作为传动机构应用场合由于内、外螺纹的滑动摩擦阻力大,运动传递效率不佳。为了克服这一缺点,固体间的相互滑动摩擦改为滚动摩擦的滚珠丝杆机构,或者为了防止固体间直接接触,研制了一种在内、外螺纹间隙间充满流体的静压丝杆机构。图1表示静压丝杆原理,在螺母上加工 1. Screw In mechanical institutions, the screw is one of the most important agencies, a wide range of screw, which is the most widely used sliding screw, simple structure, easy processing. As a transmission mechanism applications, due to internal and external thread sliding friction resistance, poor motion transfer efficiency. In order to overcome this shortcoming, the mutual sliding friction between solids was changed to rolling friction ball screw mechanism or a static pressure screw mechanism filled with fluid between male and female threads was developed in order to prevent direct contact between solids. Figure 1 shows the principle of hydrostatic screw, the nut on the processing