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本文介绍一种多用途的活塞式压力计。以前使用的活塞式压力计结构原理如图1所示。活塞与活塞缸配合,活塞在活塞缸中,由于底部所加的压力和活塞的重量逐渐平衡而上下移动。活塞与活塞缸之间保持着一微米左右的极小间隙。在这个间隙中流入极微量的从底部供给的空气等流体,活塞由于这种流体的粘性便能在活塞缸内灵活转动。压力供给口是向活塞底部加压用的,它用T形接头与活塞缸连结,能输入、输出压力。承重托盘是为变更测量范围而设置的支架,在它上面可放置各种砝码,用以改变活塞上的重量。外罩是测定绝对
This article describes a multi-purpose piston pressure gauge. The principle of piston pressure gauge used in the past is shown in Fig.1. Piston and piston cylinder with the piston in the piston cylinder, due to the bottom of the pressure and the gradual balance of the weight of the piston and move up and down. Between the piston and piston cylinder to maintain a tiny gap about one micron. In this gap, a very small amount of fluid such as air supplied from the bottom flows into the gap, and the piston can be flexibly rotated in the piston cylinder due to the viscosity of the fluid. Pressure supply port is used to pressurize the bottom of the piston, which is connected with the piston cylinder T-joint, can import and export pressure. Load-bearing tray is set to change the measurement range of the stent, it can be placed in a variety of weights, used to change the weight on the piston. Cover is measured absolutely