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1、Ricardo Port Flow Bench 里卡多气道试验台2010-02-08 20:41:02 View:0 RicardoPortFlowBench里卡多气道试验台Introduction:介绍：The accurate evaluation of engine port characteristics in terms of flow capacity and the developed “in cylinder” air motion properties are of increasing importance in both the product improvement p
2、rocess and for production conformance testing.The “in-cylinder” air motion pattern develops as a “swirl” characteristic where the rotational axis is about the centreline of the cylinder or may be dominated by a “tumble” effect in which the body of rotation is perpendicular to the cylinder bore.对于发动机
3、在气道空气流通能力和缸内气体运动方面的气道特性的精确评估在产品改进过程和产品一致性测试中发挥越来越重要的作用。气体缸内流动模式分涡流（旋转中心线为气缸轴线），或者滚流（旋转中心线与气缸轴线垂直）。Ricardo and its supply partner have supplied equipment to undertake this form of testing for many years comprising the flow measurement and swirl detection systems packaged as a self-contained testing f
4、acility. The swirl or rotational flow component is measured using a transducer system. In this technique the “momentum” of the rotating air pattern is directly monitored through the torque reaction exerted on a flow straightening matrix restrained by a precision load cell installed on the axis of th
5、e flow stream.里卡多和其供应商已经在气流测试和涡流检测方面研究了多年，形成了独立的测试系统。涡流或旋转气流的检测使用一个传感器系统。在该技术下，通过安装在气流旋转轴线上的扭矩仪对旋转气体由于变成直线运动而在蜂窝片产生的扭矩测量，从而对旋转气体的动量进行直接监控。And also Ricardo method for the air flow coefficient, the swirl and tumble evaluation is one of the mostly used methods in the world.同时，里卡多对于空气流通系数和涡流，滚流的评估方法是世界上
6、使用最多的几种方法之一。Hardware configuration:硬件配置：1. Air flow system 空气流量系统Including a two direction blower, a large flow conditioning plenum chamber包括一个可用于吸风或吹风模式的可变速可逆向的鼓风机，一个大稳压箱2. Main flow bench carrying the cylinder head and measurement system 主测试台，用于安装测试用的气缸盖和测量系统Including one test bench, a dummy cylin
7、der, one swirl meter and L.F.M. air flow meter包括一个测试台，一个模拟气缸套，一个涡流动量计，一个L.F.M. 空气流量计。The bench is constructed from mild steel hollow sections of varying thickness. The mounting plate on the bench is supported on four ball transfer units and outboard roller guides for easily installation and position
8、ing for each cylinder of the cylinder head. The dummy cylinder is fixed under the bench which connected to the right test cylinder with a swirl meter inside. A spacer adaptor is then required to position the cylinder head face at the specified dimension from the upper surface of the swirl meter.测试台用
9、低碳钢制造的空心型管，有不同的厚度。测试台上的安装盘由4个滑轮单元支撑和一个外置滚轮导轨支持，以方便安装和定位气缸盖上每个气缸。模拟缸套安装在测试台下部，在测试时与对应气缸位置对接。涡流动量计安装于气缸套内，它使用一个垫片调节器去定位气缸盖底面到涡流动量计之间的距离。3. Valve actuator system and lift measurement 气门执行机构和升程测量Including two set of systems, each contains one stepper motor, one lift measurement transducer, a supporting
10、shaft for motor and transducer mounting, also a setting gauge for zero datum valve lift position.包含两套系统，每套系统包括一个步进电机，一个升程传感器，一个支承轴用于支撑步进电机和传感器，同时还提供一个塞尺用于升程零位回复。The standard flowbench configuration is supplied with two independently operated actuators and lift measurement transducers, the mechanisms
11、 are both mounted on the main support shaft but may be individually adjusted for position across the fixture and inclination in two planes.The complete support shaft assembly carrying the actuator/lift transducer units is mounted on a vertical slide plate rigidly attached to the face of the flowbenc
12、h, the shaft housing being secured by quick action screw clamps and a vertical height adjustment feature.标准的气道试验台配置是有着两套独立的执行机构和气门升程测量传感器。这两套装置都安装在主支承轴上，但是可以单独调整到气缸盖固定机构上方和在相对可以有一定倾斜角度。装有执行器和升程传感器的主支承轴组件安装在一个可垂直滑动的面板上，该面板刚性连接到测试台面板上（垂直面板）。支承轴外壳依靠快速螺旋夹具和一个垂直高度调节器紧固。Contact with the engine valve is ty
13、pically through a “finger” type attachment to the actuator bearing directly on the valve stem or valve follower as most convenient.通常气门与执行器轴承的接触类似手指接触，连接处最为方便的是直接接触气门阀杆或者阀推杆。4. Rig measurement control and data system 测试操作系统和数据系统Swirl and Tumble measurement method:涡流和滚流测量方法：The momentum of the rotati
14、onal component of the induced in-cylinder air motion characteristic is measured directly by an “Impulse Swirl Meter” mounted rigidly on the attachment face of the flowbench.The test cylinder head is mounted either directly above the swirlmeter for “swirl” measurement or perpendicular to the meter us
15、ing an extended tube fixture for “tumble” evaluation.系统使用一个涡流动量计直接测量缸内气体运动的动量。由于该动量计固定安装在与测试台接触处，因此测量涡流时被测气缸盖直接安装在涡流动量计上，而测量滚流时使用一个延长的管路固定器使其垂直于涡流动量计。Contact:联系：021-33675858, Ricardo Shanghai021-33675858，里卡多上海Ricardo，founded by Sir Harry Ricardo with about 100 years history， is a leading independent provider of technology， product innovation， engineering solutions and strategic consulting to the worldwide automotive industries.里卡多是由Harry Ricardo出资成立，迄今已有近100年历史，是世界汽车行业技术，产品创新，工程解决方案和战略咨询的领先的独立的供应商。http:/
