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一、压力表的构造图1是一个简单的压力表,把它剖开后,就可以看到它的内部构造,如图2和图3。当流体(水、油)或气体,由管口1到达椭圆形的环形管子2以后,它的内壁受到了压力,使环形管的末端向外伸张,带动连杆3使杠杆4和扇形齿轮5,由于扇形齿轮5的摆动使指针心轴上的正齿轮转动,指针就根据着环形管伸张的程度,指示出管内流体压力的大小。
First, the pressure gauge structure Figure 1 is a simple pressure gauge, cut it open, you can see its internal structure, as shown in Figure 2 and Figure 3. After the fluid (water, oil) or gas reaches the oval ring pipe 2 through the nozzle 1, the inner wall of the ring pipe 2 is subjected to pressure so that the end of the ring pipe is extended outward to drive the rod 3 to move the lever 4 and the sector gear 5 Due to the oscillation of the sector gear 5, the spur gear on the pointer mandrel rotates, and the pointer indicates the magnitude of fluid pressure in the tube according to the degree of extension of the annular tube.