| 1. | 14 npt lead pressure transition joint and back welding lead - pressure tube code c12
A2 . - 14npt引压过渡接头及后部焊接引压管代码“ c12 ” |
| 2. | 1 2 - 14npt lead pressure transition joint and back welded lead pressure tube stainless steel
1 2 - 14npt引压过渡头及后部焊接引压管不锈钢 |
| 3. | 1 2 - 14npt lead pressure transition joint and back welded lead pressure pipe stainless steel
1 2 - 14npt引压过渡头及后部焊接引压管不锈钢 |
| 4. | A2 . 14 npt lead pressure transition joint and back welding lead - pressure tube code c12
A2 . - 14npt引压过渡接头及后部焊接引压管代码“ c12 ” |
| 5. | This paper analysed working principles and controling features of water lifts about the head pressure transition . plc was used to operate controling system so as to work the system well
摘要对水头差压力转换提水装置的工作原理及控制特点进行了分析，使用可编程控制器( plc )控制系统运行，使系统很好的工作。 |
| 6. | Fluid noise mainly comes from out put pulsation of rate of flow , the main reason of out put pulsation of rate of flow is the instant high pressure return flow that obturation cubage produced when the big round curve pressure transition . the v trough on the port plate can reduce the fluid noise . in this paper , the author based on the acting of dam a river and condensability of liquid and used matlab language as tool to calculate the v trough on the original port plate and drew out the p - t diagrammatic curve and analyzed its shortcoming and improved the design of original v trough and got that the best size of its angle was 12 . 3 and its length was 5mm and the cross section was an equilateral triangle
流体噪声主要来源于输出流量脉动，造成输出流量脉动的主要原因是闭死容积在大圆弧段压力切换时产生的瞬时高压回流，在配流盘上开设v型尖槽可降低因高压回流而引起的流体噪声，本文以截流作用和液体的可压缩性为理论依据，以matlab语言为工具，对原配流盘上的v型尖槽进行了理论计算，绘制出p - t图线，分析了它的不足，并对原有v型尖槽进行了优化设计，得出了v型尖槽的最佳几何尺寸：配流盘平面上的v型尖槽的两边的夹角为12 . 3 ，槽长5mm ，槽的横截面为等边三角形。 |
