fann35六速旋转粘度计(fann35)

Fann35六速旋转粘度计

简介：fann35六速旋转粘度计（进口） 以及我们推荐的35系列粘度计（国产），是质量上乘的粘度计，适合与钻井液行业，压裂液行业，瓜尔胶行业，如果更换专用精密弹簧，特别适合于黄原胶行业，成为黄原胶行业专用的六速旋转粘度计。另外我公司提供常用维修配件及维修服务。

北京科氏力科学仪器有限公司（18514528620）我公司提供：fann35六速旋转粘度计（进口） 以及我们推荐的35系列粘度计（国产）如果需要请和我们联系。

是测试钻井液流变性的***仪器，流变性是指钻井液流动和变形的特性，该特性通常是由不同的流变模式及其参数来确定的，***常用的流变模式为宾汉和幂率模式，其中宾汉模式的参数为塑性粘度和动切力；幂率模式的参数为流性指数和稠度系数。

Fann35系列粘度计是一种直接读数型粘度计，有6速和12速两种型号，使用50Hz或者60Hz电源。标配电源是115V，但是所有的型号在使用过程中需要配备220/230的电源转换器。

外旋同轴圆筒型旋转粘度计将待测泥浆充满内外筒之间的环形空间。当外筒以一定速率旋转时可进行粘度测量。外筒旋转对浆液产生一个粘滞拽力，该力使内筒出现转矩，传递给连接内筒的精密弹簧发生偏转，测量出偏转角度与仪器的测试常量做比较。该测试系统可以真实模拟工业生产过程中遇到的流动工艺过程。

外旋同轴圆筒型旋转粘度计可以测量粘度值，比如Fann35型粘度计，给定剪切速率测剪切力。这是牛顿流体的一种线性关系，也就是剪切力与剪切速率的比值是一条直线。在很多情况下，当非牛顿流体的流变性接近牛顿流体时，也可用这种粘度计测量粘度值。记录下来的粘度值是35型粘度计推荐的一条直线或者是牛顿标准值，这说明如果样品的流变特性是非牛顿直线，就不能使用该计算方法测量。这种情况下Fann35的读数盘和转子-浮子的读数应该用另外一种非线性的剪切力/剪切速率方法计算，可以接近流体的特性。

在仪器使用标准转子、浮子和扭簧以300rpm的转速旋转时，设定牛顿流体的粘度值为百分之一厘泊（或）。其他速率下的粘度值可通过刻度盘读数获得。塑性流体的近似粘度值测试方法见6B部分。

选择不同的转速或使用不同的转子-浮子组合能改变剪切速率的范围。简单更换多种扭簧扩大剪切力的范围，也增加了测试流体的种类。

The FANN® Model 35 viscometer are direct reading instruments which are available in six speed and 12 speed designs for use on either 50 Hz or 60 Hz electrical power. The standard power source is 115 volts but all of the models may be fitted with a transformer which makes operation with 220/230 volts possible.These are true Couette coaxial cylinder rotational is cometer since the test fluid is contained in the annular space (shear gap) between an outer cylinder and the bob. Viscosity measurements are made when the outer cylinder, rotating at a known velocity, causes a viscous drag to be exerted by the fluid. This drag creates a torque on the bob, which is transmitted to a precision spring where its deflection is measured and then compared with the test conditions and the instrument's constants. This system permits the true simulation of many of the significant flow process conditions encountered in industrial  processing.

Viscosity as measured by a Couette type viscometer such as the Model 35 is a measure of the shear stress caused by a given shear rate. This relationship is a linear function for Newtonian Fluids, i.e. a plot of shear stress vs. shear rate is a straight line. In many instances, while the fluid of interest may not be Newtonian, its rheology is near enough to Newtonian that this viscometer can be used and the viscosity calculated as though it were Newtonian. It should be noted that the recommended calibration of the Model 35 is a linear or Newtonian calibration. This means that if the sample fluid characteristics are extremely Non-Newtonian the linear method of calculating the viscosity cannot be used. In this case the Model 35 dial reading and speed along with the dimensional data on the rotor and bob used will have to be calculated

using an appropriate formula for a non-linear shear stress / shear rate relationship that closely fits the characteristics of the fluid.These instruments have been designed so that viscosity in centipoise (or milli-Pascal seconds) of a Newtonian fluid is indicated on the dial with the standard rotor, bob, and torsion spring operating at 300 rpm. Viscosities at other test speeds may be measured by using multipliers of the dial reading. A simple method of close approximation of viscosity in a plastic fluid, such as a drilling fluid is described in Section

6B. The range of shear rates may be changed by selecting rotor speed and using various rotor-bob combinations. A variety of torsion springs are available and designed to be easily interchanged in order to broaden shear stress ranges and allow the measuring of viscosity in a wide variety of fluids.

我公司另外供应：

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化学试剂类：英国评价土；粘度计校正用标准油20cp、50cp、100cp、200cp、500cp、1000cp、2000cp、3000cp、5000cp；凹凸棒土；标准土；钠基准土；钙基准土；堵漏剂；增粘剂；高膨胀量钙基准土；各类标准液；缓冲液；ph缓冲液；加热油；导热油；压力油，振动筛校正用标准颗粒,IMERYS系列材料。