查询词典 heat shield

The invention relates to a heat shield arrangement (5) for a hot gas conducting structure, in particular a metal component of a gas turbine unit or combustion chamber (10), with heat shield elements (20) anchored adjacently on a support structure (15) to cover a surface.

本发明涉及一种用于导引热燃气的部件、尤其用于导引燃气轮机的结构件的隔热装置以及制造此类装置的方法。

Given the same total flow effusion from holes, the results show that the heat shield gets a higher average cooling effectiveness when the opening ratio is 3% compared with 6%; cooling effectiveness is sensitive to the height of ripple board, the heat shield gets the highest cooling effectiveness when the dimensionless height of ripple board is 1% compared with 2% and 3.33%; but there is a little influence on the cooling effectiveness of the liner with the change of the diameter of holes and the height of cooling passage.

研究表明：在气膜孔出流总量相同的情况下，3%开孔率比6%开孔率的隔热屏平均冷却效率较高；波纹板高度对隔热屏冷却效果影响较大，波纹板无量纲高度为1%比波纹板无量纲高度为2%和3.33%的隔热屏平均冷却效率高；孔径和冷却通道高度的改变对隔热屏冷却效果几乎没有影响。

It is shown that the friction force and bulkhead thrust are the main factors of shield thrust setting, while the friction between the cutterhead and soil is the main factors of cutterhead torque setting. Friction force between shield and soil would make front soil of shield upheave, and subsidence of surface soil is induced by ground loss when the friction force between the cutterhead and soil results in the surface settlement asymmetrical distribution.

通过计算发现，盾构施工中盾壳摩擦和正面推力是盾构推力设置的主要因素，而刀盘与土体摩擦是刀盘扭矩设置的主要因素，盾构前方土体隆起主要由盾壳摩擦引起，刀盘摩擦作用主要引起地表沉降的非对称分布，地表沉降主要由盾尾空隙产生。

Based on a series of signal process and noise source identification techniques, especially the major noise source identification methods, such as expurgation method, sound intensity analysis, spectrum analysis vibro-acoustic correlation analysis and so on, the pass-by noise control of SC7080A and SC6360B are studied in detail. By the roadway and dais experiments, the major noise and radiating parts are identified and some economical controlling methods are made. For the SC7080A, to control the emissing noise from the intake and shell vibration of air cleaner, a intake muffler is installed between the air cleaner and intake valve. Based on the theory of Helmholtz resonator, One three-parallel-connected resonant silencer is designed and trial-manufactured. For the SC6360B, the attenuation performance of exhaust muffler in high frequency region is improved. To reduce the vibration noise of shell part, the structure of oil sump tank, exhaust manifold shield and exhaust manifold shield are analyzed and improved. At the same time, some measures, such as sound absorption, sound insulation, are taken to reduce the noise of engine surface emissivity and a sound shield is designed.

本文首先综述了目前国内外汽车加速噪声控制的现状、主要方法和技术措施，在此基础上，结合SC7080A和SC6350B汽车的车外加速噪声水平及现状，综合运用分别运行法、声强法、频谱分析法、声振相干函数法等现代噪声源识别方法，对SC7080A和SC6360B汽车进行了准确详细的车外加速噪声源识别并提出了经济可行的控制方案，针对SC7080A，主要在空气滤清器和进气阀门之间的进气管道上加装进气消声器，抑制空气滤清器壳体表面和进气口两处的噪声辐射，根据Helmholtz共振腔原理设计了三腔并联旁支型共振消声器，并进行了工程化设计和试制；针对SC6360B，主要改善了排气消声器在高频段的消声性能，对罩壳类零件进行了结构改进，降低了其表面噪声的辐射，并对发动机舱进行了吸声、隔声处理，设计了发动机隔声罩。

From describing the controlling anchor amount and shield thickness of the Kao-Tang Railway Tunnel Ⅳ class rock wall segment initial protecting shield, the article analyses the function theory of New Austria Tunneling Method initial protecting shield and its use in the flabbiness wall rock protecting.

结合铁路考塘隧道中的Ⅳ级围岩地段初期支护中的锚杆数量与喷层厚度控制，分析了新奥法初期支护的作用原理以及此类支护在软弱围岩中的应用。

Based on the sectional shield tunnels of metro in China, mechanical behavior of segment structure of shield tunnel under the different erection methods has been studied with geometric proportion of 1:12 through the simulated model tests of 3D 'ground-shield tunnel' in which joint effects of segments and mutual action effects between segments and ground are considered.

以我国城市地铁区间盾构隧道为对象，采用几何比 1/12、同时考虑盾构隧道管片接头效应和管片与土体相互作用效应，用三维土-盾构隧道相似模型试验对盾构隧道管片结构在不同拼装方式下的力学行为进行了研究，并将研究结果与梁-弹簧模型的理论分析结果进行了比较，得出的结论可为盾构隧道的设计提供参考。

This article introduced the antijamming in the NC system design,from the shield (including electric field shield ,magnetic screen and electromagnetic field shield ) designs mentions,added the absorbing circuit to the perceptual load to suppress the transient state noise to give the specify,might avoid the NC system which disturbed creates softly breakdown.

本文介绍了抗干扰在数控系统中的设计，从屏蔽(包括电场屏蔽、磁场屏蔽和电磁场屏蔽)设计谈起，对感性负载加吸收电路来抑制瞬态噪声做了详细说明，可避免干扰造成的数控系统的"软"故障。

This paper brings the method of the internal magnetic shield mainly from the principal of magnetic shield, the choice of shield material and the determination of its thickness.

主要从磁屏蔽原理、磁屏蔽材料的选择以及屏蔽层厚度确定等方面进行阐述。

The shielding effectiveness of cylindrical shield and the influence of the shield on the magnetic field in the solenoid are calculated by using finite element method. The curves of the shielding effectivencess and magnetic field in the solenoid against the shield dimension are obtained.

采用有限元方法计算了圆柱形屏蔽体的屏蔽效能和屏蔽体对螺线管内部磁场的影响，得到屏蔽效能和螺线管内部磁场随屏蔽体尺寸变化的曲线。

At present company's products mainly include: precision machinery Dustproof Series: rubber protective cover, oil shield, shield plate, screw shields, flexible organ-style guard rail, multi-use type shields, welding shields, stainless steel armor-type shield machine, the overall telescopic organ shields, steel plate, stainless steel guard rail machine tools, special steel products produced by telescopic guard.

目前公司产品主要有：精密机械防尘罩系列：橡胶防护罩、耐油防护罩、钢板防护罩、丝杠防护罩、柔性风琴式导轨防护罩、多用型护罩、焊接护罩、不锈钢盔甲式机床防护罩、整体伸缩式风琴护罩、钢板、不锈钢板机床导轨防护罩、特殊钢材制作的伸缩式护罩。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。