1) steady water supplying
稳压给水
1.
This paper suggested a steady water supplying method With this method,a water supplying system can be designed of several pumps in parallel The pumps work on the principle of binary system,so the water supplying system works well The water pressure is stead
提出了一种稳压给水方法。
2) steady high pressure fire water supply system
稳高压给水系统
1.
According to pressure relief questions discussion is made in order to perfect the design of steady high pressure fire water supply system for high-rise buildings to promote understanding and application of this water supply system.
研究了稳高压给水系统的特点,详细地介绍了稳高压给水系统的几种稳(增)压措施,探讨了稳高压给水系统的减压问题,以完善高层建筑稳高压消防给水系统的设计,提高人们对稳高压给水系统的认识,从而推广该给水系统。
3) stable high pressure fire water supply system
稳高压消防给水系统
1.
This paper introduced the mechanism of stable high pressure fire water supply system and discussed the main points of design including system model and component; water supply area arrangement, equipment allocation and technical parameters determination; control mode and interlock requirement.
系统地阐述了稳高压消防给水系统的工作原理,探讨了设计要点,包括系统的形式及组成;系统供水范围划分、设备配置及技术参数确定;控制方式及联锁要求。
4) adding pressure
给水增压
5) reducing pressure water supply
减压给水
1.
Based upon comparison of various water supply ways in domestic water supply system of high-rise building in this paper according to practical situations author points out the reducing pressure water supply of elevated water tank or mixed method are more economical and reasonable ways for high-rise building.
通过高层建筑生活给水系统各种给水方式的分析比较 ,指出根据具体情况采用高位水箱减压给水方式或几种给水方式的结合在目前是比较经济合理的给水方式。
6) pneumatic water supply units
气压给水
1.
The work characteristics of pneumatic water supply units with two parallel pumps were discussed in this paper.
文章讨论了双泵并联工作气压给水系统的工作特点。
补充资料:AC-DC-AC-DC型开关稳压电路
AC-DC-AC-DC型开关稳压电路
AC-DC-AC-DC type switching voltage stabilizing circuits
对小功率的AC一DC一AC一IK!型稳压电路,可省去图中的集成驱动器,由集成控制器直接驱动。AC一DC一AC一】兀型稳压电路组成的开关电源及模块,广泛应用于通信和其他电子设备中作为一次电源用。AC DC ACDCx一rlg伙019七Jo了1 wenyod旧z〕JLJAC一OC一AC一OC型开关稳压电路(AC一DC一AC一IX二type switehing voltage stabilizingcircuits)将交流电压通过整流滤波电路及DC一〔X)开关变换器,并借助反馈环节得到稳定直流输出电压的开关型稳压电路。其原理方框图如图所示。图中输人和输出端都加有噪声溥波器。电容滤波的全波整流电路中,开机时有一大的充电电流流过整流管。为了削弱该冲击电流,在AC一DC一AC一IX{型稳压电路中加人软起动电路。又因电容滤波的整流电路中电流失真很大,使功率因数很低。为了提高功率因数,通常采用功率因数校正技术。90年代以前,采用无源校正技术,只能对基波进行相移补偿或抑制某些指定的谐波。实际应用中,还受到体积、质量、价格等因素的限制。9。年代普遍采用高频有源功率因数校正技术。图中的有源功率因数校正电路实质上是一种升压式有源功率因数校正(b oost一PFC)电路(见DC一DC型开关稳压电路)。它可将稳压电路的输入电流波形变换为与输入电网电压同相位的正弦波,变换效率可大于98%。这样,可以降低线路损耗,节约能源,减小电网的谐波污染。┌───┐ ┌────┐┌─────────┐┌──┐│NF │ ┌───┐│ pFC ││ OC~O(: ││ 哪││,噪声│ │_整流 ││功率因数││ 变换器 ││噪声││健波 │ └───┘│ 校正 ││(含高频整流及滤波)││滤波││ │ │ │└─────────┘│ │└───┘ └────┘ └──┘ ┌─────┐ │ SS │ ┌─────┐ │软起动 │ │集成驱动器│ │ │ └─────┘ └─────┘ ┌─────┐ │集成控制器│ └─────┘ AC一1)C一AC一1)C型开关稳压电路原理方框图
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参考词条