Article number Yang Yudong mechanical science and technology kind of high-pressure large-flow pneumatic differential pressure control valve research Yang Yidong, Li Zhuangyun Huazhong University of Science and Technology, Wuhan structure characteristics. In terms of its performance, the theoretical division and experimental research have adopted the principle of direct-acting diaphragm type amplifying structure and gas static pressure support. The valve has the advantages of responsive sensitivity control, high resilience and high adaptability. Currently, the valve has been used. The pneumatic system of a launching device has the advantages of non-soil response, fast medium and easy access to the medium, and has been widely used in various industrial sectors. However, the elasticity of the compressed air is small and the rigidity is small, especially in the case of high pressure and large flow, in order to obtain higher pressure control accuracy and comparison, the author has developed a working pressure; up to 3 old 1 free air flow up to 20001 Pressure control valve. Due to the adoption of the direct-acting diaphragm type amplifying structure and the gas static pressure supporting principle, the valve has the advantages of high response precision and high adaptability, and has been practically used on a certain launching device. This paper mainly introduces its structural characteristics, and carries out theoretical analysis and experimental research on its performance. 1 Structural features and diaphragms isolate it. When the valve is working, the valve core is subjected to system pressure; 7, above the claws Force 0, and the downward force of the spring to move up and down, so that the valve port opens and closes, and the excess gas in the system is released through the valve port to clamp the system pressure to realize the difference in the body of the dead body. The purpose of control. In fact it is a direct-acting differential pressure relief valve with remote control. The valve mainly has the following structural features. 2 The mathematical model is designed to control the volume of the cavity in the system. According to the equation of energy equation of the gas equation, the dynamic equation of the valve is obtained. The mathematical model of the dynamic analysis of the valve is 1 using a single-stage direct-acting type. Structure, the valve core is directly used as the force comparison component, and the response speed is fast; 2The membrane is used to amplify the structure, and the micro-difference pressure of the upper and lower chambers is amplified by the diaphragm and then connected to the corpse spool, which can improve the precision of the differential pressure control; 3 The gap between the valve core and the valve sleeve is matched, and a small amount of compressed air is formed through the annular gap to form a gas static pressure bearing, which effectively reduces the attachment of the core movement. Improve the core action, the sensitivity of the 4 dragons to achieve higher control accuracy of the differential pressure 40, improve the valve's adaptive ability.
3 Simulation and experiment 3.1 Simulation analysis According to the response speed, and the control precision of the differential pressure 4 is the objective function, and it is considered to be self-changing, and the dynamic performance simulation analysis is performed on the call. Nayongming is in, where, only wait for the parameters to be timed, and vice versa. , the response speed and the difference of the number of 矣 对 对 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The stiffness of the illusion is small within the range of the 桡 以 以 以 计 , , , , , , , , , , 2 2 2 2 2 2 2 , , , , , , , , , , , , 设计 设计 设计 设计 设计 设计 设计 设计 设计 设计3, the differential pressure and control accuracy, the maximum free air overflow of the valve port exceeds the mountain to change the spring pre-compression can get different speed and control accuracy. 3.2 Experimental study to verify the theoretical analysis results and examine the performance of the prototype, The dynamic performance experimental system of 3 is established. The compressed air supplied by the air source 1 is divided into two paths through the filter 21, and the passage through the decompression 42 throttle valve 5.2 reaches the remote pull port of the prototype to simulate the force; the other road is decompressed and called 4.1. The throttle valve 5.1 inflates the volume-defined gas storage tank 7 as a system controlled chamber. First close the ball valve 4. Open 1! The ball is called 3.6, so that the still, =0, 1 contraction curtain gas enters the lower chamber of the prototype, adjusts the pressure reducing valve 4.1 and the pressure regulating spring of the test pressure control valve to make the opening pressure to 0.2, that is, set the differential pressure. =2,81 Then, set the remote control pressure 矣 2.7, and fill the air tank with the pressure still, +0.32, the compressed air closes the ball valve 3.
3. Open the fast-pass valve 8 to allow the compressed air in the gas storage tank to act on the test pressure control valve 9, and pass the pressure sensor dynamic resistance strain gauge to convert the long 12 loader 13 and the printer 14 to detect and record 0 changes with time, used to analyze the performance of the research prototype 1 actual results are different, 27 river set 32; 1 contraction air control, and the imitation of the optimized Nago kiss M better, adjust The pre-pressure 1 shrinkage of the spring can make the fixed-edge jade force 0.22 with only 1. The response speed and the j control precision are unchanged, which can adapt to the application needs of the larger fixed pressure range. Q4圮 Gas storage tank factory=18.2 Initial pressure 4 Actual application of the Carin 5 launching device system in the water launching device bottle The gas is lowered into the launching chamber of the elbow by the launching valve and pushes the elbow to the right. Movement, driving the emitted object to launch. Due to the underwater launch, the object to be launched is submerged into the water, and the piston must be subjected to the force of the water depth during the movement of the piston. The action of the ejected object is obtained at the time of exiting the pipe. Under the condition, the acceleration of the movement must be strictly controlled, that is, the differential pressure of the launching process should be strictly controlled to ensure the effective driving force of the piston. The differential pressure control valve 3 is set in the system to control the difference between the wide range of the launching pressure and the depth of the water. The effect is good. The specific method is to set the airbag at the launching pipe and the deep casting, and convert the environmental water depth into the same air pressure, that is, inside; let the remote control port of the differential pressure control valve 3 be applied, and adjust the pressure regulating spring. The amount of compression required to match the fixed pressure to the effective pressure of the elbow is such that during the launching process, the differential pressure control valve can be used to greatly reduce the difference between the pressure of the firing chamber and the depth of the water. Stabilize it to 1 to achieve the purpose of controlling the exit velocity of the emitted object. Turn down the unbalanced acceleration on page 453 to get a satisfactory effect. The filtering effect of the two filters is not much different. From the design point of view, Butterworth The design calculation of the filter is easier, but the calculation speed of the latter is designed. The order number 昼2, from the perspective of real-time analysis, it is more appropriate to select =3, which has both faster calculation speed and higher precision. 1 step digital low-pass filter 2; filtering is designed by the above-mentioned finger. The difference equation of the Worth digital filter is as follows: 0.9780309 bound 2 time domain filtering result 43, the mean square error of the reference signal and the filtered signal is 0.1817358. The first-order seven-dimensional digital pool set by the above technical index. The section of the wave filter; 1 is as follows; =6.Ji54 10 +0.98290532 The time-domain filtering result of the four-way filter is 4,894,875, which is slightly larger than the former, which is due to the fluctuation of the top of the Chebyshev filter. It can be seen that the overlap of the filter curve and the reference curve is not ideal, and the filter curve is not smooth.
3 Babu recognizes that the pool wave device Dibo knot phantom å» æ–¹ æ± æ± æ± æ± æ± æ± æ± æ± , , , , , , , æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± æ± The difference equation has the following form: design calculation, the Butterworth digital filter difference equation Chebyshev digital filter difference equation filter curve filter line original 汕 line, flicker also filter 邶 filter knot, å£ åˆ‡ 弋 弋 滤 滤 滤Filter results The results of the two filters are very similar, the filter curve appears smooth, the overlap is better than the order, no need to increase the order to reduce the calculation time.
The process of initial volume allowance, the fluctuation of the back end of about 500, 18 and the horizontal part is the actual time process. The False Sea 36 and the sea test curve test said that (4) the control of the launching chamber pressure is obvious, and the difference between the pressure of the launching chamber and the depth of the water can be controlled to 3,1 within the range of 28 cubits and 3 radii. Internally, the exit pipe speed of a certain device is guaranteed under different depth conditions, which satisfies the design requirements. In general, the differential pressure control valve has a high response speed and high control accuracy, and should be strong, and the remote control pressure changes from 2.7 to 2.7. Condition 5 of 1, the valve can obtain 0 differential pressure in 30,1; and the maximum working pressure reaches 3.0, and the maximum free air overflow flow reaches 20,000, which can adapt to the application of certain specific environments. . Pneumatic transmission system dynamics. Guangzhou South China University of Technology published Yu Zuyao and other Kang type pneumatic relief valve and its dynamic analysis machine I31 1. Ren et al. Pneumatic pressure control valve 1 . 1 test 1. machine fluid 5 conclusions from the above analysis, using Butterworth and Chebyshev function design
Hot Product,hot selling products 2022,hot sale products,hot selling products usa
ZHONGSHAN G-LIGHTS LIGHTING CO., LTD. , https://www.glightsled.com