The result shows that the size of the stand crown cover performs negative correlation with the density of Oncomelania hupensis on the beach land.
林分郁闭度大小是改变林下生态环境的主导因素,通过对林下草本植物分布变化以及林下温度、湿度、光照及地下水位等因子的调查分析研究,结果表明:滩地林分郁闭度大小与钉螺密度呈负相关关系。
Optimization of spiral seal applied to mechanical driven shaft in flue gas desulphurization system of dense flow absorber;
密相干塔烟气脱硫除尘系统机械传动轴用螺旋密封的优化
Through an analysis of structural failure of dual-end-face, mechanical seal and soft packing seal parts of centrifugal oil pumps, a suggestion of improving the pump seal structure with spiral seal made of engineering plastic material is proposed and practiced with satisfactory effect.
通过对离心式油泵端面密封和软填料密封的结构失效分析,提出端面密封改进措施,采用工程塑料制 造螺旋密封来改进离心式油泵的密封结构,取得满意的效果。
Comparing former design of seal structure-stuffing seal,the new sealing structure-spiral seal was reslndied and introduced.
对某钢厂烧结工艺过程中产生的废气与熟石灰反应的密相干塔烟气脱硫除尘系统中出现矿粉泄露的现象进行分析,比较了先前的机械传动轴与壳体的密封结构——填料密封,发现此结构存在设计选型上的缺陷,重新研究分析采用新的密封结构——螺旋密封,利用Matlab进行优化,确定出轴与壳体之间最优密封结构尺寸。
This paper briefly introduces the sealing principle of the screw sealing feed water pump, and deals with its frequent trip problem arising from inadequate pressure difference of seal water.
在对螺旋密封式给水泵的密封原理作简要介绍的基础上 ,针对其因密封水压差小而导致频繁跳泵的问题进行了讨论。
Problems in the construction design of screw seals;
螺旋密封结构设计应注意几个问题
Research And Optimizing of Sealing Capability For Screw Seal;
螺旋密封封液能力的探讨及其优化
In this paper,sealing capability of screw seal for different construction type and different slot shape is discussed theoretically from the viewpoint of engineering application better practicality theoretical formula on sealing capability are proposed.
从工程应用的角度，对不同结构型式和不同槽形的螺旋密封的封液能力进行了理论探讨，并提出了实用性较好的螺旋密封封液能力计算式。
Application and Dissemination of Double-Vortex Seal in Pipeline Pump.
双螺旋密封在长输油泵上的推广应用
Numerical Simulation Study of Helical Seal on Water-lubricated Hydrostatic Bearings
水润滑轴承螺旋密封性能的仿真分析
Finite Element Analyse of the Distortion of Sealing Ring of Spiral Groove Gas Face Seals;
螺旋槽气体端面密封密封环变形有限元分析
Research on Performance of Dry Gas Seal with Single-row Bidirectional Spiral Grooves
单列双向螺旋槽干气密封的性能研究
Research on the Sealing and Transportation Characteristics of Screw Conveyor in EPBS
盾构螺旋输送机密封及输送特性研究
Analysis and Overhaul of Contra-Rotating Propellers Mechanical Seal Malfunction
对转螺旋桨机械密封故障分析及检修
Class 300-600: Fully-encased spiral wound graphite-filled stainless steel gasket.
600磅级：全封闭螺旋缠绕石墨填充不锈钢密封垫。
Numerical Simulation and Optimum Groove Geometric Parameters for Spiral Groove Dry Gas Seal;
螺旋槽干气密封数值模拟及其槽形参数优化
Three-Dimensional Numerical Analysis of Spiral Groove Dry Gas Seals;
螺旋槽气体端面密封的三维稳态数值分析
Theoretical and experimental study of fluid dynamic mechanical face seals with deep spiral grooves;
深螺旋槽流体动压机械密封性能理论研究
The Research on Steady-state and Dynamical Characterization of Hubricating Gaseous Film in the Sprial Grooved Gas Seals;
干气密封螺旋槽润滑气膜的稳、动态特性研究
Discussion about the Calculation Methods of the Gas Film Pressure of the Spiral Groove Dry Gas Seals
螺旋槽干气密封端面气膜压力计算方法讨论
Performance Analysis of the Spiral Groove Floating Ring Seal Based on CFD Analysis
基于CFD方法的螺旋槽浮环密封性能分析
Numerical Simulation and Parameters Research on Spiral Groove Gas Face Seals Fluid Field;
螺旋槽干气密封端面流场的数值模拟及参数研究
The Research on Gas-Film Spiral Groove Face Seal in Rich Gas Compressor of Coking Unit;
焦化富气压缩机螺旋槽干气密封参数研究及应用
Performance Research on a Spiral-Groove Dry Gas Seal with an Inner Annular Groove
带内环槽的螺旋槽干式气体端面密封的性能研究
calculation for bolt load of double-cone seal
双锥密封的螺栓力计算
United States standard dry seal thread
美国标准干密封螺纹
