真空的

Vacuum valve types: solenoid valve, butterfly valve, valve, flashboard valve, damper valve, fine-tuning valve, ball valve vacuum, vacuum regulating valve and so on, were used to drive manual, electric, pneumatic, electro-magnetic action, etc., caliber from 0.8-1200, leakage rate from 6.7 10-2-1.3 10-7PaL / S, the application of temperature -30 ~+400 , apply pressure range 1 105-1 10-7Pa (low, high, ultra-high vacuum system), is widely used in aerospace, electronics, energy, environmental protection, food, machinery, refrigeration, medicine, scientific research and other fields, the vacuum in the domestic industries enjoy a high reputation.

真空阀门类：电磁阀、蝶阀、隔膜阀、插板阀、挡板阀、微调阀、真空球阀、真空调节阀等，驱动装置分别采用手动、电动、气动、电磁动等方式，口径从0.8-1200、漏率从6.7×10-2—1.3×10-7PaL/S，适用温度-30℃～+400℃，适用压力范围1×105—1×10-7Pa，广泛应用于航天、电子、能源、环保、食品、机械、制冷、医药、科研等各领域，在国内真空行业享有较高的声誉。

In this study,TGA and self-made vacuum pyrolysis apparatus were used to detect the characteristics of biomass pyrolysis liquation and the rules of preparation of activated carbon under vacuum.The seven kinds of common agricultural and forestry waste biomass were from Yiyang. The main contents studied are as follows:(1) TGA was used to detect the influence of biomass species and heating rate on the pyrolysis reaction.

本研究采用真空热重分析仪和自制的真空热解实验装置，对益阳地区7种农林废弃生物质进行了真空热重、真空热解液化和真空化学活化等实验研究，以探讨生物质真空热解特性行为和生物质真空化学活化法制备活性炭的规律等，主要内容包括以下几个方面：(1)对7种生物质进行了真空热重分析，考察了不同生物质原料、升温速率对生物质真空热解反应的影响。

Some key part is ameliorated to meet the demands of working. This thesis mainly includes:(1) Analysing the working principle of the spring operateing mechanism, expatiating the character of the mechanism;(2) With the design aim of the spring operating mechanism, accomplishing the design of ZW□-12/630-20 outdoor HV vacuum breaker based on the systemic design theory of the spring operating mechanism, which includes spring mechanism of open-close switch; cam mechanism based on the principle of power balance; buckle-off mechanism with force-minished device; ratchet wheel mechanism with number-increased detent;(3) In the design on the spring operating mechanism for the outdoor vacuum breaker, using the air cushion device with speed controller to ensure the steady working of the spring operating mechanism;(4) Accoding the problem of daily maintenance for HV circuitbreaker, giving some effective steps of daily maintenance.

论文工作主要包括以下几个方面：(1)从真空断路器弹簧操动机构的功能原理出发，详细分析了该机构的工作原理，阐述了机构工作的基本特性；(2)根据工程实际提出了真空断路器弹簧操动机构的设计目标，在系统分析弹簧操动机构设计理论的基础上，完成了ZW□-12/630-20型户外真空断路器弹簧操动机构的设计工作，其中包括真空断路器弹簧操动机构的分合闸弹簧机构的设计；以输出力特性曲线设计机构理论演化出的功率平衡原则为基础的凸轮机构的设计；带有减力机构的滚动摩擦扣结方式的脱扣机构设计；根据实际情况增加了棘爪数量的棘轮机构设计；(3)在真空断路器弹簧操动机构的设计中，引入了速度控制模式空气缓冲器，对惯性负载起到了良好的自动缓冲效果，从而保证了真空断路器弹簧操动机构稳定、有效地运行，保证了真空断路器的动作质量；(4)针对目前真空断路器运行过程中存在的问题，提出了有效的日常维护措施。

The research work done is presented as follows:Compound dewatering technique of vacuum tube well is an effective technology for solving the dewatering problems of aquitard and interface relict water according to physical simulation test and field test. The variation laws, such as degree of vacuum, pore water pressure in different strata, have been studied. The results show that there is a certain scope of influence of vacuum in strata, and the vacuum degree in the horizontal direction decreases gradually with the increase of the distance from the main well; the change law of degree of vacuum in the vertical direction increases firstly and then decreases with the depth of soil strata, and changes with different soil nature and depth; changes of pore water pressure in soil strata has also shown a similar law of degree of vacuum.

主要研究工作如下：通过室内物理模拟试验和现场试验均证明了真空管井复合降水技术用于解决弱透水层和界面残留水疏干难题的有效性；并且对不同地层中真空度、孔隙水压力等变化规律进行了研究，发现地层中真空度均有一定的影响范围，且真空度在水平方向上随距主井距离的增加而逐渐降低；在垂直方向上真空度随深度总的规律是先增加后降低，并随土层性质及深度的不同而变化；土层内孔隙水压力也呈现出与真空度类似的变化规律。

Schmalz founded in 1910, with proud tradition offers innovative and efficient vacuum solution to customers from different industries: automotive industries, packaging industries, solar industries, etc.

施迈茨的真空产品，包括真空元器件、真空搬运系统、真空夹具系统等，广泛应用于汽车、包装、太阳能、金属加工等众多领域。

Vacuum partial pressure control system is composed of computer system, vacuum modulation valve and partial pressure pump, of which the valve is one of key parts of the equipment.

真空偏压控制系统由计算机系统、真空调节阀、真空偏压泵等部件构成，其中真空调节阀是设备的关键部件之一。

The main product comprises silp-valve vacuum pumps, root vacuum waterring vacuum pumps, series roary vance vacuum pumps and various kinds of vacuum pumps system,Our products are widely used in areas,covering metallurgy, chemical industry,medical and pharmaceutical appliction, light and textile industry, electrical industry, defence scientifice researches etc,.

我厂主要产品有：滑阀真空泵、罗茨真空泵、往复真空泵、水环真空泵、旋涡泵各类真空机组、及真空应用设备，与供氧设备，其也通用设备制造、加工、修理。真空浸渍我厂产品广泛应用于冶金、化工、医药、经纺、电子、国防、科研等部门。特别H-8B型泵，在原有基础上经过改进，获得了更高的真空度和使用寿命。

Japanese companies will play an AE Pawa of technology, management and manufacturing advantage, using the Great Wall of Tianshui successful experience in marketing, development, production and marketing of a new generation of high-voltage switchgear.

公司将主要生产40.5kV C-GIS气体绝缘开关柜、12kV真空断路器及126kV高压真空断路器等产品。40.5kV C-GIS气体绝缘开关柜是日本AE帕瓦研发的符合中国标准的最新产品；12kV真空断路器是综合日本AE帕瓦和天水长城的产品开发能力合作开发的新一代真空断路器产品；126kV高压真空断路器是日本AE帕瓦开发的、将真空断路器技术运用于高压领域的独有技术产品。

At lot of industrial production processes, such as vacuum filter, vacuum water, vacuum feed, vacuum evaporation, vacuum concentration, vacuum and vacuum degassing resurgence and so on, multi-stage pumps have been widely used.

在工业生产的许多工艺过程中，如真空过滤、真空引水、真空送料、真空蒸发、真空浓缩、真空回潮和真空脱气等，多级泵得到广泛的应用。

Based on the theory of aerothermodynamics for rarefied gas, discusses the principle of compound heat transfer in the vacuum layer.

应用稀薄气体分子热运动理论，研究了真空层复合传热机理，提出了真空层当量导热系数计算方法，分析了不同真空层压力和热媒温度对真空层传热量的影响以及导热、对流和辐射传热量在真空层总传热量中所占比例和变化规律，提出优化真空保温管道保温性能的方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。