简要介绍了高度表测量系统用射频前端收发组件的设计方案。详细阐述了主要功能单元电路和重要技术指标的设计考虑。该射频前端达到的指标为:输出发射功率大于16 W,输出功率全温稳定性小于0.1 d B/10℃,收发隔离大于112 d Bc,端口泄漏小...简要介绍了高度表测量系统用射频前端收发组件的设计方案。详细阐述了主要功能单元电路和重要技术指标的设计考虑。该射频前端达到的指标为:输出发射功率大于16 W,输出功率全温稳定性小于0.1 d B/10℃,收发隔离大于112 d Bc,端口泄漏小于34 d BμV等。展开更多
The current research of seawater hydraulic motor mainly focused on piston motor and vane motor, but seldom regarded low speed high torque seawater hydraulic motor. Low speed high torque seawater hydraulic motor as a k...The current research of seawater hydraulic motor mainly focused on piston motor and vane motor, but seldom regarded low speed high torque seawater hydraulic motor. Low speed high torque seawater hydraulic motor as a kind of energy conversion device and actuator plays an important role in seawater hydraulic transmission system. However, the physical and chemical properties of seawater, such as low viscosity, high causticity and poor lubrication, result in numerous problems. In this paper, the flow distribution characteristics of port plate pairs for the seawater hydraulic motor are investigated, and the leakage flow and power loss models of port plate pairs are established. Numerical simulations are carried out to examine the effects of water film, inlet pressure and rotating speed on the pressure distribution and leakage flow. And the friction and wear tests of port plate pairs are also carried out. Moreover, the test system of the seawater hydraulic motor is constructed and the performance of prototype with no-load or loading is conducted. The results indicate that the clearance of port plate pairs and inlet pressure have a significant effect on distribution characteristics, but the effect of rotating speed is not very obvious. The experimental results show that the minimum error rate can be maintained within 0.3% by the proposed flow model and the counter materials of 316 L against carbon-fiber-reinforced polyetheretherketone(CFRPEEK) are suitable for the port plate pairs of seawater hydraulic motor. Finally, based on the seawater hydraulic experiment platform, the volumetric efficiency of no-load and loading are obtained that the maximum can achieve 94.71% and 90.14%, respectively. This research work may improve the flow distribution performance, lubrication and the friction and wear properties, enhance energy converting efficiency of port plate pair and provide theoretical and technical support for the design of highperformance water hydraulic components.展开更多
利用CAESARⅡ软件,综合考虑通用型浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)在海洋环境中受到风浪载荷及温度变化和船体变形产生的附加位移等对管道的作用,根据设计的压载水管路系统建立三维模型,给出建模...利用CAESARⅡ软件,综合考虑通用型浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)在海洋环境中受到风浪载荷及温度变化和船体变形产生的附加位移等对管道的作用,根据设计的压载水管路系统建立三维模型,给出建模过程中对泵口的模拟方法,并对玻璃钢管道泵口载荷及法兰泄漏进行分析校核。经验证,该压载水管路系统中压载泵及法兰的设置是合理的,可排除安全隐患,为通用型FPSO管路系统的设计与优化提供技术支撑与数据参考。展开更多
基金Supported by National Natural Science Foundation of China(Grant Nos.51505111,51805125)Zhejiang Provincial National Natural Science Foundation of China(Grant No.LQ16E050003)+1 种基金Hebei Provincial National Natural Science Foundation of China(Grant No.E2015203006)Open Foundation of State Key Laboratory of Fluid Power and Mechatronic Systems(Grant No.GZKF-201519)
文摘The current research of seawater hydraulic motor mainly focused on piston motor and vane motor, but seldom regarded low speed high torque seawater hydraulic motor. Low speed high torque seawater hydraulic motor as a kind of energy conversion device and actuator plays an important role in seawater hydraulic transmission system. However, the physical and chemical properties of seawater, such as low viscosity, high causticity and poor lubrication, result in numerous problems. In this paper, the flow distribution characteristics of port plate pairs for the seawater hydraulic motor are investigated, and the leakage flow and power loss models of port plate pairs are established. Numerical simulations are carried out to examine the effects of water film, inlet pressure and rotating speed on the pressure distribution and leakage flow. And the friction and wear tests of port plate pairs are also carried out. Moreover, the test system of the seawater hydraulic motor is constructed and the performance of prototype with no-load or loading is conducted. The results indicate that the clearance of port plate pairs and inlet pressure have a significant effect on distribution characteristics, but the effect of rotating speed is not very obvious. The experimental results show that the minimum error rate can be maintained within 0.3% by the proposed flow model and the counter materials of 316 L against carbon-fiber-reinforced polyetheretherketone(CFRPEEK) are suitable for the port plate pairs of seawater hydraulic motor. Finally, based on the seawater hydraulic experiment platform, the volumetric efficiency of no-load and loading are obtained that the maximum can achieve 94.71% and 90.14%, respectively. This research work may improve the flow distribution performance, lubrication and the friction and wear properties, enhance energy converting efficiency of port plate pair and provide theoretical and technical support for the design of highperformance water hydraulic components.
文摘利用CAESARⅡ软件,综合考虑通用型浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)在海洋环境中受到风浪载荷及温度变化和船体变形产生的附加位移等对管道的作用,根据设计的压载水管路系统建立三维模型,给出建模过程中对泵口的模拟方法,并对玻璃钢管道泵口载荷及法兰泄漏进行分析校核。经验证,该压载水管路系统中压载泵及法兰的设置是合理的,可排除安全隐患,为通用型FPSO管路系统的设计与优化提供技术支撑与数据参考。
