Flow characteristics of variable hydraulic transformer
A new kind of hydraulic transformer, called variable hydraulic transformer(VHT), is proposed to control its load flow rate. The hydraulic transformer evolves from a pressure transducer to a power transducer. The flow characteristics of VHT, such as its instantaneous flow rates, average flow rates, and flow pulsations in the ports, are investigated. Matlab software is used to simulate and calculate. There are five controlled angles of the port plate that can help to define the flow characteristics of VHT. The relationships between the flow characteristics and the structure in VHT are shown. Also, the plus-minus change of the average flow rates and the continuity of the instantaneous flow rates in the ports are presented. The results demonstrate the performance laws of VHT when the controlled angles of the port plate and of the swash plate change. The results also reveal that the special principle of the flow pulsation in the ports and the jump points of the instantaneous curves are th...
上汽通用VT40E变速器介绍(二)
1.从动带轮压力传感器在VT40E变速器的控制阀体上安装有主、从动带轮压力传感器(图22),它们用于监测施加到主从动带轮活塞的液压力。
基于单片机的移动气象监测装置的结构设计
介绍了一种基于单片机设计的多功能智能气象检测装置。该装置主要以单片机为核心,使用压力传感器测量风速,电子罗盘测量风向,并用Zigbee模块进行数据的无线传输。装置运动机构采用异构加装摆动臂的履带机构。并配备自动追光系统的太阳能蓄电系统,可以执行复杂环境无人值守的气象监测。
模型表面测压技术研究
南航研制了小量程薄型压力传感器，厚度０．８ｍｍ左右，量程为±１００００Ｐａ，静校各项精度均小于０．２％。贴在模型表面任何部位可同时测量静态和脉动压力，传感器具有较高的频率响应特性，高达８０ｋＨｚ。在南航ＮＨ－２风洞用薄型传感器研究了圆柱体的静态和脉动压力特性。
瞬变温度流场速变压力测量传感器技术研究
从分析压力传感器的平面膜片结构在变温场中存在的失稳现象入手，突破常规设计方法，采用新颖的球壳状膜片结构，克服了失稳现象，结合采取一系列相应的技术措施，实现了瞬变温度流场速变压力的实时精确测量。