速啟閥門 的英文怎麼說
中文拼音 [sùqǐfámén]
速啟閥門
英文
quick-opening gate valve-
In the hydraulic transmission systems, after the valve is suddenly open and shut off, there will be a fluid transient in the form of pressure pulsation propagating along the pipeline
液壓系統中，閥門的快速開啟或關閉會在管路中發生壓力瞬態脈動過程。A comparison of the flows with different gate - opening rates shows the causes that opening the gate at a higher rate is favorable to the reduction of cavitation, gate vibration as well as the gate load fluctuation. in addition, a study has been made to show the influence of the high - speed jet flow coming downward from the narrow gate gap on the flow condition in the tunnel downstream to the gate
通過分析比較不同閥門開啟速率對流動特性的影響，闡明了快速開啟閥門不僅有利於減少空化空蝕也有利於減小弧門振動和啟門力的脈動，此外，研究了門楣處狹窄縫隙高速射流對門后流態、壓力脈動和弧門受力等方面的影響。That digital electro hydraulic control system possesses characteristics of quick and precision in governing, modifing speed regulator on line, realizing automatic turbine control and valve manage. are stated
說明了數字電液控制系統具有調節速度快、精度高、可在線修改速度變動率、可實現汽輪機自啟停控制和閥門管理特點。If the valve is too large, the disc will float in a partially open position and may cause fluttering of the disc and rapid wear
如果閥門太大，則閥瓣浮動只能達到部分開啟位置，並且可能導致閥瓣的振動和迅速磨損。Unsteady separated flow, produced during the gate - opening period in the reverse radial gate tunnel of a high - lift shiplock, is characterized by negative pressure and high velocity as well as their intense fluctuations in space and time and could easily result in various harmful phenomena such as cavitation, gate vibration and sonic boom, which have been observed and confirmed by prototype and physical model tests
高水頭船閘輸水反弧閥門開啟過程中，后廊道內發生急變分離流，負壓、高速水流以及壓力與流速的劇烈時空脈動變化容易誘發空化空蝕、門振和聲震等有害現象已被原型觀測和物理模型試驗研究證實。After valve is closed ( press control ) pump will stay at min speed before stopping. during delay stop, pump can be restart or stop immediately
壓力控制中，在閥門關閉后泵不會立即停止，而是低速運行一段時間（可設定）后停止。根據需要，在此期間泵能再次啟動或立即停止。By measuring the differential pressure and using a regulated valve position to balance the flow rate to the same % dfr as the index valve, the next most favored branch can then be proportionally balanced as above and so on - finally after all the branches have been proportionally balanced the branch valves can then be proportionally balanced to each other
通過測量壓差和使用一個將流動速率平衡到與指標閥相同的% dfr的已經調節開啟位置的閥門，次容易分支隨后也可以合上述過程一樣被比例平衡，等等-最後，在所有分支都被比例平衡之後，分支閥門隨后也可以互相比例平衡。Threaded seat rings are easily accessible for repair or replacement. packing swing bolts on most valves simplify packing replacement. all pacific bolted bonnet designs facilitate fast disassembly
螺紋閥座環易於接近進行維修或更換。大多數閥門上的填料旋啟式螺栓簡化了填料的更換。所有美國太平洋螺栓閥蓋結構使得拆卸更加迅速。During unit startup and load is lower than 15 %, drum level is controlled by feedwater control valve, feedwater pump remains at minimum safety speed ; when load is between 15 % and 25 %, feedwater control valve is closing at fixed speed determined by function module, main motor - operated - valve is opened automatically, control mode of drum level is transferred to feedwater pump automatically and bumplessly ; when load is between 25 % and 50 %, control valve is closed fully, and main motor - operated - valve is open fully, drum level is controlled by one pump ; when load is more than 50 %, first pump is kept in operation, second pump is putting into operation automatically and
在機組啟動、沖轉及機組並網至15 %負荷階段，給水泵維持在最低安全轉速下運行，汽包水位由低負荷給水調節閥自動控制; 15 %至25 %負荷階段，給水調節閥由函數模塊按照一定的速率自動平滑關閉，主給水電動門自動打開，汽包水位控制方式自動無擾切換為給水泵自動控制;負荷在25 %至50 %階段時，給水調節閥已完全關閉，主給水電動門已完全打開，水位控制已全由單臺給水泵承擔;負荷大於50 %后，在第一臺給水泵運行的同時，第二臺給水泵自動無擾投入。Quick opening devices for dry pipe valves for fire protection service
防火設施用干管閥門的快速開啟裝置分享友人