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粗纺梳毛机主机传动的改进
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作者 曲爱军 王学伟 柳建 《山东纺织科技》 2000年第5期38-40,共3页
提出了几种常用粗纺梳毛机主机传动的技术改进措施 ,有利于提高产量、质量 ,开发新产品 ,增加企业效益。
关键词 粗纺梳毛机 主机传动 技术改进 同步传动 变频调速
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NXE—1型锥板式粘度计故障检修分析示例
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作者 梁士坤 叶淑群 +1 位作者 陈权 吕群松 《湛江师范学院学报》 2005年第3期140-141,共2页
关键词 NXE-1型锥板式粘度计 精密检测仪器 液体粘度 故障 检修 采样检测电路 主机传动系统
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CR5116D型立式车削柔性加工单元主要结构特点
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作者 梁吉祥 《机床》 CSCD 1990年第11期22-24,21,共4页
本文通过对以大型立式车削中心为主机的结构特点及工作台自动拖换系统的结构特点,说明CR5116D型立式车削柔性加工单元是一台技术密集型的机电一体化产品。
关键词 立式车削中心 主机传动系统
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意大利RAMELLA BIELLA梳毛机的改进
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作者 曲爱军 梁延爽 《陕西纺织》 2001年第3期52-53,共2页
我厂于1988年引进一台RAMELLA BIELLA梳毛机,同其它机型相比,该机在自动喂毛半和主机传动方面有一定的优点,为进一步适应市场对毛纱产品品种、档次等方面的要求,我们先后对该机在喂毛斗、主机传动等方面作了一些改进。通过两年多... 我厂于1988年引进一台RAMELLA BIELLA梳毛机,同其它机型相比,该机在自动喂毛半和主机传动方面有一定的优点,为进一步适应市场对毛纱产品品种、档次等方面的要求,我们先后对该机在喂毛斗、主机传动等方面作了一些改进。通过两年多的使用,效果明显,改造成功。 展开更多
关键词 意大利 梳毛机 电子毛斗 主机传动 改进
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CRP-Z型舵桨的原理及其管理
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作者 李灵波 《天津航海》 1997年第1期21-23,共3页
主机传动扭矩通过万向轴、中间轴传至Z型推进装置的输入轴,经过上螺旋锥齿轮带动齿型联轴节中间轴、带动下部螺旋锥齿轮驱动螺旋桨旋转,舵桨回转、主机遥控和监视报警3个子系统构成操纵系统,扩大了适用范围。
关键词 船舶 舵桨 CRP-Z型 主机传动 主机遥控 监视报警
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16V240ZJB型柴油机主机油泵传动装置润滑方式改进
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作者 朱多祥 罗维海 臧志强 《内燃机车》 北大核心 2002年第9期40-42,共3页
通过柴油机主机油泵传动装置故障统计分析 ,得出该故障是由于在润滑方式、配件质量及组装工艺等几方面存在问题造成的 。
关键词 柴油机 主机油泵传动装置 润油方式 故障统计 原因分析 机车 润滑系统 技术改进
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Optimized transmission coordination mechanisms for opportunistic routing
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作者 Chen Wei Qin Zhiguang Liu Qiao Jin Jing 《High Technology Letters》 EI CAS 2011年第3期236-244,共9页
The successful rate of transmission coordination of opportunistic routing (OK) is analyzea systematically, and then two efficient transmission coordination mechanisms (TCMs) are proposed for OR: a batch sliding w... The successful rate of transmission coordination of opportunistic routing (OK) is analyzea systematically, and then two efficient transmission coordination mechanisms (TCMs) are proposed for OR: a batch sliding window-based TCM and a bit map-based TCM, to reduce the total number of packet transmissions and improve end-to-end throughput for OR. The batch sliding window-based TCM avoids the oscillation of the successful rate of transmission coordination by transmitting packets in continuous batch mode so as to improve the average successful rate of transmission coordination efficiently, while the bit map-based TCM improves end-to-end throughput of OR by reducing the overhead of transmission coordination. Exhaustive simulations show that the average end-to-end throughput gains of the two proposed TCMs are 15.4% and 6.4% over the batch map-based TCM, respectively. 展开更多
关键词 opportunistic routing (OR) batch sliding window transmission coordination multi-hop wireless networks bit map
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Research on hydraulic wind turbine semi-physical simulation platform 被引量:2
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作者 艾超 Chen Lijuan +2 位作者 Kong Xiangdong Liao Lihui Chen Wenting 《High Technology Letters》 EI CAS 2015年第3期269-275,共7页
According to a research on the 30kVA simulation experimental platform of hydraulic wind tur- bine, its basic structure, composition and operation principle are expounded in this paper. An in- verter motor is used to s... According to a research on the 30kVA simulation experimental platform of hydraulic wind tur- bine, its basic structure, composition and operation principle are expounded in this paper. An in- verter motor is used to simulate the wind turbine, while a similarity calculation method is applied be- tween the small and large wind turbine. A fixed displacement pump-variable motor closed loop is used as the main transmission system, and a self-excited synchronous generator generates electricity through the grid connection. The experiment and simulation study on the speed and power control of the hydraulic wind turbine is conducted, based on the experimental platform, thus correctness and progressiveness of the experiment platform is further verified. The experimental platform study lays a foundation for further research on the characteristics of hydraulic wind turhln~ 展开更多
关键词 wind power generation hydraulic transmission simulation of experimental platform
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Control Strategies and Mechanisms for Active Control of Sound Transmission into a Vibro-acoustic Enclosure
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作者 靳国永 冯娜 杨铁军 《Journal of Marine Science and Application》 2011年第2期206-214,共9页
An analytical study was presented on active control of sound transmission into a vibro-acoustic enclosure comprising two flexible plates. Two types of actuators were used, i.e. acoustic actuator and distributed lead z... An analytical study was presented on active control of sound transmission into a vibro-acoustic enclosure comprising two flexible plates. Two types of actuators were used, i.e. acoustic actuator and distributed lead zirconate titanate piezoelectric (PZT) actuator instead of point force actuator. Using the modal acoustic transfer impedance-mobility matrices, the excitation and interaction in the coupled sound transmission system can be described with clear physical significance. With the control system designed to globally reduce the sound field, different control system configurations were considered, including the structural actuator on the incident plate, actuator on the receiving plate, acoustic actuator on the cavity, and their combinations. The effectiveness and performance of the control strategy corresponding to each system configuration were compared and discussed. The role and control mechanism of each type of actuator were of particular interest. It was shown that the incident plate actuator is effective in controlling the cavity-dominated modes and the structural modes dominated by the incident plate and receiving plate. Two main control mechanisms are involved in this control configuration, i.e., modal suppressing and modal rearrangement. For control system configuration with only acoustic actuator in the enclosure, the mechanism involved in this arrangement is purely modal suppression. Desirable placements of structural actuators in terms of total potential energy reduction were also discussed. 展开更多
关键词 sound transmission active control control mechanism ENCLOSURE piezoelectric (PZT) actuators
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南石机研制出3000m撬装钻机
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《矿山机械》 北大核心 2002年第11期12-12,共1页
关键词 南阳石油机械厂 3000m撬装钻机 主机传动系统 模块结构 安全保护措施
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Genetic Algorithm to Optimize the Design of Main Combustor and Gas Generator in Liquid Rocket Engines 被引量:5
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作者 Min Son Sangho Ko Jaye Koo 《Journal of Thermal Science》 SCIE EI CAS CSCD 2014年第3期259-268,共10页
A genetic algorithm was used to develop optimal design methods for the regenerative cooled combustor and fuel-rich gas generator of a liquid rocket engine. For the combustor design, a chemical equilibrium analysis was... A genetic algorithm was used to develop optimal design methods for the regenerative cooled combustor and fuel-rich gas generator of a liquid rocket engine. For the combustor design, a chemical equilibrium analysis was applied, and the profile was calculated using Rao's method. One-dimensional heat transfer was assumed along the profile, and cooling channels were designed. For the gas-generator design, non-equilibrium properties were derived from a counterflow analysis, and a vaporization model for the fuel droplet was adopted to calculate residence time. Finally, a genetic algorithm was adopted to optimize the designs. The combustor and gas generator were optimally designed for 30-tonf, 75-tonf, and 150-tonf engines. The optimized combustors demonstrated superior design characteristics when compared with previous non-optimized results. Wall temperatures at the nozzle throat were optimized to satisfy the requirement of 800 K, and specific impulses were maximized. In addition, the target turbine power and a burned-gas temperature of 1000 K were obtained from the optimized gas-generator design. 展开更多
关键词 Liquid Rocket Engine Main Combustor Gas Generator OPTIMIZATION Genetic Algorithm
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