所有缸筒受压时,孔径都会径向地膨胀。膨胀程度取决于工作压力、缸的尺寸大小和缸简材料的弹性。在所有的缸中,除了柱塞缸外,活塞上都有密封件。为了保证缸内活塞密封件切实起作用,特别是对于非金属密封件来说,重要的是要避免发生密封件挤入活塞与缸筒间的间隙中。这种问隙的大小是随工作压力大小而改变的。对于高压场合来说,元件对间隙值的选择则是很严格的。当要求作用在缸上的静载荷偏移很小,或者甚至不允许有偏移时,避 When all cylinders are pressurized, the aperture expands radially. The degree of expansion depends on the working pressure, the size of the cylinder and the elasticity of the cylinder material. In all cylinders, there is a seal on the piston except for the plunger cylinder. In order to ensure the effective functioning of the cylinder piston seal, it is important, especially with non-metallic seals, to prevent the seal from squeezing into the gap between the piston and cylinder. The size of such a gap varies with the size of the work pressure. For high-voltage applications, the choice of component gap is very strict. When it is required that the static load acting on the cylinder should be offset very little or even not allowed