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吸入压头
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  “吸入压头”译为未确定词的双语例句
     And the founded cause of vibration and noise was from pump gas failure. A solution of setting up a extra pump at inlet to increase the draw pressure and pump gas amount has been adopted.
     根据装置现有实际情况 ,采取在泵入口设置增能器方法 ,来提高泵的吸入压头 ,进而提高泵装置汽蚀余量。
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     And the founded cause of vibration and noise was from pump gas failure. A solution of setting up a extra pump at inlet to increase the draw pressure and pump gas amount has been adopted.
     根据装置现有实际情况 ,采取在泵入口设置增能器方法 ,来提高泵的吸入压头 ,进而提高泵装置汽蚀余量。
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     GEOMETRICAL EFFECTS OF INDENTER IN PROCESS OF INDENTING ROCK
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  suction head
Cavitation of a centrifugal pump is the result of insufficient net positive suction head (NPSH) and can occur within the entire range of operating conditions.
      
Increases in suction head of the pump that drove the filtration process were measured at impeller speeds of 100 and 200 rpm.
      
Surprisingly, suction head attained at 200 rpm was about 40% higher than at 100 rpm.
      
Soil moisture and suction head in an irrigated orchard were continuously monitored by time domain reflectometry (TDR) probes and gypsum blocks, respectively, during and between successive irrigation events.
      
Uniform suction head profiles are shown to be linearly stable to three-dimensional disturbances.
      
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  net positive suction head
Cavitation of a centrifugal pump is the result of insufficient net positive suction head (NPSH) and can occur within the entire range of operating conditions.
      
Equation 3-19 can be used to calculate the net positive suction head available for a pump.
      
It is possible to ensure that cavitation is avoided during pump operation by monitoring the net positive suction head of the pump.
      
Net positive suction head required to stop a pump from cavitating.
      
Net positive suction head available is the difference between the pump suction pressure and the saturation pressure for the liquid being pumped.
      
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The carbonate pump is the key equipment in galoy plant of Maoming ethylene company. There existed vibration and noise on outlet pipeline and inlet pipeline from August 1996 when this pump started to operate. The extent of vibration was about 18 m at inlet and 8 m at outlet .The maximum vibration value can reach 25~35 mm. The maximum noise can reach 116 decibels. The shaft of some equipment had been affected badly by vibration and noise. The cause of this phenomenon was analyzed through investigating the design...

The carbonate pump is the key equipment in galoy plant of Maoming ethylene company. There existed vibration and noise on outlet pipeline and inlet pipeline from August 1996 when this pump started to operate. The extent of vibration was about 18 m at inlet and 8 m at outlet .The maximum vibration value can reach 25~35 mm. The maximum noise can reach 116 decibels. The shaft of some equipment had been affected badly by vibration and noise. The cause of this phenomenon was analyzed through investigating the design and practical operation of this pump. And the founded cause of vibration and noise was from pump gas failure. A solution of setting up a extra pump at inlet to increase the draw pressure and pump gas amount has been adopted. After the pressure pump was installed the vibration phenomenon was eliminated basically. The noise was reduced to permissible extent. The running period of this pump has reached one year.

茂名乙烯乙二醇装置关键设备碳酸盐泵 ,1 996年 8月投料试车后 ,泵及进出口管线存在异常噪声和振动 ,管线的振动范围入口端约为 1 8m ,出口端约为 8m ,管道最大振幅可达 2 5~ 3 5mm ,噪音最高达到 1 1 6db ,严重影响设备的安全运行。从装置设计、实际操作状况、试验入手分析 ,找出了产生振动的直接原因是泵汽蚀。根据装置现有实际情况 ,采取在泵入口设置增能器方法 ,来提高泵的吸入压头 ,进而提高泵装置汽蚀余量。安装增能器后 ,管线振动基本消除 ,噪音也降到安全环保规定范围内 ,使碳酸盐泵的运行周期由 3个月延长至 1年以上

Based on the working experience, with respect to general feature of pumps used in chemical factories, a set of methods to calculate the parameters, such as flow volume, head, net positive suction head and shutoff pressure, of pumps was summed up. The methods are systematic and object-like, and are suitable to be used in engineering.

在整理以往工作经验的基础上,针对化工厂用泵的一般特点,总结出了一套计算泵的流量、扬程、净正吸入压头和憋压等设计参数的方法。该方法系统、直观,适宜在工程计算中普遍采用。

 
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