pressure balance

Auto control of soil pressure balance for pressure inserted tube excavator

顶管掘进机土压平衡的自动化控制

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Technical difficulties and Countermeasures of carbonate reservoir under-balance pressure drilling

碳酸盐岩储层欠平衡钻井技术难点与对策碳酸亚乙烯酯的合成

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Under balance pressure drilling of Bo-601 well

渤601井欠平衡钻井技术

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The earth pressure balance ( EPB) shield tunneling machine is an important technical equipment for infrastructure projects, resource development and national defense.

土压平衡盾构机是国家基础建设、资源开发和国防建设急需的重大技术装备。

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Earth pressure balance ( EPB ) shield is used most extensively in shield construction.

土压平衡式 盾构 机是盾构法施工中应用最为广泛的盾构机.

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The main types of shield machines used recently in tunnel construction are earth pressure balance ( EPB) shield tunneling and slurry shield tunneling.

减小盾构刀具磨损，是保证土压平衡盾构长距离掘进的重要措施。

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Computer Aid Design for the Earth Pressure Balance Tunnel Boring Machine

土压平衡盾构机的计算机辅助造型设计

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Combining the soil pressure balance TBM selected in certain tunnel construction, the paper makes check calculation to the key parameters.

并结合某隧道施工中选用的土压平衡盾构机，对关键参数进行了校核计算。

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Combining with projected region which be spontaneous combustion, then carrying out measures of pressure balance, looking for air leakage channel, into sand and air stopping for plugging at possible self-ignition region, finally, achieved good results.

最后结合预测的自然危险性区域对可能自燃的区域进行了均压措施、寻找漏风通道、注砂和密闭堵漏等防灭火措施，取得了较好的效果。

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Under balance pressure drilling technology and coalbed gas development

欠平衡钻井技术与煤层气开发

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The guide valve control the pressure oil to drive the main vale so as to accomplish the pressure fluid in the sealing space to be on and off, which can assure the shutter BOPs to take action at the condition of pressure balance during the working time.

工作时，先导阀控制液压油驱动主阀实现井口密封空间中压力液体的开通和关断，从而实现闸板防喷器在其上下压力平衡的条件进行开关操作。

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Construction Technique of Shielding the Sand Bed with Soil Pressure Balance

砂层地段土压平衡盾构施工技术探讨

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Under balance pressure drilling techniques of the horizontal well and high

塔里木轮南奥陶系碳酸盐岩高压油气藏水平井及大斜度井欠平衡钻井技术

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To determine dust catalyst density in the smoke of refinery set by pressure balance system.

采用动压平衡采样系统测定炼油厂催化装置再生烟气中的催化剂粉尘,结果表明,该系统比预测流速法自动化程度高,故障率低,操作简便,数据准确可靠.

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Second, this paper came up with an optimal control strategy based on BP neural network to achieve the shield capsule multiple-point earth pressure balance control by adjusting the screw conveyor speed.

继而，本文提出采用BP神经网络、通过调节螺旋输送机转速实现对盾构机密封舱多点土压平衡控制的最优控制策略。

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Experimental results show that the feeding rate of liquid into the moving-bed column, liquid rising velocity of riser and height of particles in the moving-bed column have important influence on particles transport velocity, and the reason is given to the system pressure balance.

实验结果表明，密实移动床的进液量、提升液表观操作流速和密实移动床中的交换剂高度是影响固体颗粒提升速率的因素，并从压力平衡的角度对实验现象进行了解释。

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In visible experiment, the time of pressure balance decrease with the initial pressure of PRZ and temperature of CMT.

在可视化实验中随着PRZ初始压力的增加，以及CMT初始温度的增加，压力平衡响应时间减小。

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The pressure in this model is determined by mass balance, energy balance and phase equilibrium.

该模型中压力由物料平衡 、 热量平衡及相平衡联解求得.

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Based on careful analysis, it is considered that the root causing the complex accident is the pressure difference between the balance pressure needed and the actual water static pressure down hole.

本文通过分析得出，造成大26井井壁坍塌及其后的井下复杂情况的根本原因是起钻所需平衡压力与实钻井底水静压力之间存在压差。

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This alloy is easy to be activated, balance pressure is moderate and flat, and the difference of balance pressure between the hydrogen absorbing and releasing is little.

在气态储氢方面，合金活化容易、平衡压力适中且平坦、吸放氢平衡压力差小等特性。

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The experimental results indicate that the system pressure balance is kept stabilization by the total resident material in the second dipleg.

实验结果表明：双级料腿循环流化床压力平衡主要依靠第二级循环料腿中物料的停留量来维持。

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When a vehicle is braked, brake outlet port pressure is measured by a pressure censor and two high-speed valves controled by PWM signal, adjusting to brake balance, front-to-rear, to ideal in time.

实施制动时，由压力传感器检测制动器出口压力，由PWM信号控制的两个高速开关阀，适时调节前、后制动分泵中的压力，跟踪标准制动力分配曲线。

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All BX gaskets incorporate a pressure balance hole to ensure equalization of pressure that may be trapped in the grooves.

所有BX垫圈均带有一压力平衡孔，以确保垫圈两槽底间隙处的压力上下平衡。

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Construction technology of earth pressure balance shield in watery sandy stratum

土压平衡盾构穿越富水砂层施工技术探讨

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Technique and technology for under balance pressure drilling with foam fluid

欠平衡泡沫流体钻井工艺技术

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When the pressure balance broken, supercharger automatic start work next a balance.

当压力平衡打破后，增压器自动开始工作到下一个平衡。

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Study on Electro-hydraulic Simulation System of Earth Pressure Balance of Tunnel Boring Machine

盾构土压平衡电液模拟系统的研究

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The Shield Tunneling Machine Experiment System for the Earth Pressure Balance Control Mechanism

盾构土压平衡控制机理实验系统设计

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At the same time, establish the pressure balance model of every stage during the failure shut-down reverse rotation process.

与此同时，建立了故障停机反转过程中压缩机各段压力平衡模型。

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