閥門的水錘效應
陜西航天泵閥科技集團有限公司是以研發(fā)、生產(chǎn)、銷售及服務為一體的高新技術型化工閥門生產(chǎn)企業(yè)，專業(yè)生產(chǎn)鍛造球閥、三通球閥、清管閥、料漿閥、石油化工設備等產(chǎn)品，閥門品種齊全,在行業(yè)內率先通過ISO9001,CE國際認證等，并在各領域投入使用，用戶對我公司閥門產(chǎn)品高度認可，咨詢熱線:400-1800-803。
“水錘效應”（Water hammer effect )
是指當打開的閥門突然關閉，由于壓力水流的慣性，產(chǎn)生水流沖擊波，并產(chǎn)生破壞作用，這就是水利學當中的“水錘效應”，也就是正水錘。
It refers to that when the open valve is suddenly closed, due to the inertia of pressure water flow, water flow shock wave is generated and destructive effect is generated. This is the "water hammer effect" in hydraulics, that is, positive water hammer.
相反，關閉的閥門在突然打開后，也會產(chǎn)生水錘，叫負水錘，也有一定的破壞力，但沒有前者大。
On the contrary, after the closed valve is suddenly opened, it will also produce a water hammer, called negative water hammer, which also has a certain destructive force, but it is not as big as the former.
水錘效應就好像是追尾，最前面的車突然停車了，為后面的車未及時發(fā)現(xiàn)，從而造成了連環(huán)追尾事故，致使最前面的車破壞嚴重。水錘效應就是與這個類似。
The water hammer effect is like a rear end collision. The front car suddenly stopped because the rear car was not found in time, resulting in a series of rear end accidents and serious damage to the front car. The water hammer effect is similar to this.
通常，在閥門接近關閉時閉合元件突然吸入閥座，稱為溶缸閉鎖效應。
溶缸閉鎖效應是由低推力執(zhí)行機構所造成的，該執(zhí)行機構沒有足夠的推力以保持在接近閥座的位置，導致泵的突然關閉或閥門的突然關閉，從而產(chǎn)生水錘效應。對于控制閥，在某些情況下，快開型流量特性的閥門也能導致水錘效應。
Usually, when the valve is close to closing, the closing element suddenly sucks into the valve seat, which is called the cylinder locking effect.
The locking effect of the dissolving cylinder is caused by the low thrust actuator, which does not have enough thrust to keep close to the valve seat, resulting in the sudden closure of the pump or the sudden closure of the valve, resulting in water hammer effect. For control valves, in some cases, valves with fast opening flow characteristics can also cause water hammer effect.
雖然水錘產(chǎn)生很大的噪音，但真正的損害是由機械失效造成的。因為由動能急劇地變化成靜態(tài)的管線壓力，水錘會沖破管線或損傷管子支架和損害管線接頭。對于閥門，水錘能夠通過閥芯產(chǎn)生嚴重振動，它可能導致閥芯、墊片或填料的失效。
Although the water hammer makes a lot of noise, the real damage is caused by mechanical failure. Because of the sharp change from kinetic energy to static pipeline pressure, water hammer will break through the pipeline or damage the pipe support and pipeline joint. For valves, water hammer can produce serious vibration through the valve core, which may lead to the failure of the valve core, gasket or packing.
對于閥門，防止水錘的辦法是防止系統(tǒng)任何突然的壓力變化。
For valve,the way to prevent water hammer is to prevent any sudden any pressure changes in the system.
包括放慢閥門本身的關閉速度或當閉合元件接近閥座時提供較大程度的拉力和剛性。為防止壓力波動，閥門應以均勻變動的速度進行關閉。在某些情況下，當使用快開特性，可以要求改變?yōu)榈劝俜直忍匦浴τ谠诮咏y座時必須節(jié)流的控制閥，應當使用輸出推力足夠大的執(zhí)行機構，如活塞式氣動執(zhí)行機構或液壓執(zhí)行機構，或在手動旋轉的操作器的行程套管上設置特殊缺口，將減少或防止溶缸閉鎖效應。在管線系統(tǒng)上設置某種類型的防波動措施也能減少水錘?？墒褂脡毫π狗砰y或緩沖桶完成。此外氣體可被注入系統(tǒng)內，氣體的注入能減少流體的密度并提供某些壓縮性以處理任何突然的波動。
This includes slowing down the closing speed of the valve itself or providing a greater degree of tension and rigidity when the closing element approaches the valve seat. In order to prevent pressure fluctuation, the valve shall be closed at a uniform change speed. In some cases, when the quick open feature is used, it can be required to change to the equal percentage feature. For the control valve that must be throttled when approaching the valve seat, an actuator with sufficient output thrust, such as piston pneumatic actuator or hydraulic actuator, or a special notch shall be set on the stroke sleeve of the manually rotating operator, which will reduce or prevent the cylinder locking effect. Setting some type of anti fluctuation measures on the pipeline system can also reduce water hammer. This can be done using a pressure relief valve or a buffer drum. In addition, gas can be injected into the system, which can reduce the density of the fluid and provide some compressibility to deal with any sudden fluctuations.
陜西航天泵閥科技集團有限公司堅持為客戶提供滿意的產(chǎn)品和服務,如果您有相關產(chǎn)品需求或者技術疑問，請撥免費熱線，陜西航天泵閥科技集團竭誠為您服務！
航天泵閥——40年行業(yè)經(jīng)驗沉淀閥門品牌，您身邊的閥門專家!為您提供最優(yōu)質的產(chǎn)品與最有效的閥門問題解決方案，航天泵閥以“品質和產(chǎn)品”對待每個客戶，為您服務!免費熱線：400-1800-803、029-86033698（轉739）。
公眾號二維碼