低噪聲閥 的英文怎麼說
中文拼音 [dīzàoshēngfá]
低噪聲閥
英文
low noise valve-
After simulating the model of water hydraulic valves, the velocity distribution, pressure distribution, energy distribution can be obtained and relations between the valve channel and the energy loss, the negative pressure distribution can be analyzed, which offers the theory foundation for designing water hydraulic valves with the high efficiency, low energy loss and low noise
通過對水壓閥模型的cfd穩態和瞬態解析，可以得到水壓閥內流場的速度分佈、壓力分佈及能量分佈，據此定性分析流道結構（速度、壓力、流動的分離與再附壁，旋渦的產生與消失等）與能量損失、負壓分佈等的關系，從而為設計出高效率、低能耗、低噪聲的水壓閥提供理論依據。Abstract : “ high pressure oil shock ” has been found to be the major source of shock noises in the rotary piston vacuum pumps. recently, we found that the oil shock may shift forward. here, the high pressure oil - shock and the formation mechanism of three other types of shock were analyzed so as to reduce the vacuum pump noises
文摘: 「高速油液沖擊」是滑閥真空泵沖擊噪聲的主要激勵源，通過試驗發現了這一沖擊的前移現象，並進一步分析了高速油液沖擊和其他三種沖擊的形式，為降低滑閥真空泵噪聲提供了可靠的依據。Characters including : fuel atomization device replaced by gas sprayer, gas supply controlled by gas flux valve ; separate fuel supply from combustion - supporting air, regulate air supply through changing the electioneering voltage to make the fully burning and improve efficiency and reduce fuel consume ; arts and crafts are simple, the modification of the oil heater ' s configuration is little and the heating power is not below the oil heater ' s level ; because of falling the voltage of electioneering, greatly descend the noise of the sample machine compared with the original
其特點是：以燃氣噴頭替代原機燃油霧化裝置；以燃氣流量控制閥控制燃氣的供給；燃氣的供給與助燃空氣的供給相分離；通過改變主電機的電壓，調整空氣的供給量，使燃燒更加充分完全，並進一步提高了熱效率，降低了燃料消耗；工藝簡單，對原機型改動較小；樣機的加熱功率不小於原機型水平；此外，由於主電機電壓的降低，使樣機的整機噪聲比原機大大下降。The process of noise elimination based on wavelet is to eliminate disturbed noise of enterprise signals which produced when it bored, conveyed and processed. the elimination noise process is to use the valve filter method to filter the high frequency coefficient, and reconstruct the low frequency and high frequency which noise have been eliminated, the signal after noise eliminated is more glossy and it is helpful to do the trend forecast it can analyze and do trend forecast to the total trend, periodic and sudden change of signals when do the trend forecast to the enterprise signals
基於小波方法對企業數據信號展開的消噪過程，主要是對經濟數據在生成、傳遞和加工過程中產生的干擾噪聲進行消除，消噪的方法主要是採用高頻系數的閥值過濾法，通過對低頻和過濾后的高頻的重構可以還原出消噪后的信號，該信號的光滑性更好從而有益於對企業數據信號進行進一步的趨勢預測。In order to reduce the noise emitted from the compressor, some ways were given to change the structures of the suction and discharge valves in a compressor
並給出了幾種通過改善吸、排氣閥結構來降低壓縮機噪聲的方法。The jet noise theory is used to analyze noise produced during the opening period of the suction or discharge valves in a similar way, theoretical calculations are made
根據噪聲產生原理，指出降低噪聲的根本途徑是降低氣流通過氣閥前後的壓力損失，並給出降低氣流噪聲的主要途徑是：提出減小閥片剛性、厚度以及擴大排氣孔孔徑等。Besed on wavelet " s well localized characterizes in time frequency and space frequency, we can exactly depict events of nonnoise by decomposing to signal using binary - wavelet transform. for events of noise, local max can be found at singular points of signal by using wavelet transform norm of signal, so adopting multiscale wavelet analysis the maximal point of wavelet transform norm, which risen by the noise, with increasing of scale, which rien by the fault appeared. gived a properly threshold and compared the relation of data that have been transformed not only find the fault in the low noise signal but also resume the signal by filtering noise, which have good power of examining singular signal being unexpectedly change
對于噪聲中的事件點，利用信號的小波變換的模在信號的突變點取得局部最大值，採用多尺度（多分辨）小波分析，則隨著尺度的增大，噪聲引起的小波變換模的極大值點迅速減少，而故障引起的小波變換模的極大值點得以顯露，我們給出一個適當的閥值，比較閥值和變換后數據的關系，不但可以在低信噪比的信號中監測到故障信號，而且可以濾去噪聲恢復原信號，對突變的奇異性信號具有良好的監測能力，能夠有效地找出噪聲中的事件點。Low noise valve
低噪聲閥分享友人