船舶上检测重油粘度

     A Greenwich, Connecticut-based shipping company has purchased a VISCOfuel 2000 viscosity control system from Cambridge Viscosity.The VISCOfuel viscometer was installed on board one of their cargo ships this fall to monitorthe viscosity of heavy fuel oil (HFO) combustion.

Prior to the VISCOfuel, the cargo vessel had been running with a malfunctioning OEM viscometer.Without consistent viscosity control, the vessel had a number of maintenance issues including blocked injectors and inefficient combustion.The new VISCOfuel directly replaced the

original OEM viscometer without any modifications to the plumbing.Thechiefengineer and port engineer had worked with Cambridge’sVISCOpro system in the past,and came to Cambridge first because of their first-hand experience with the dependability,accuracyand robustness of the product.The upgrade was the first ofthe fleet, with additional upgrades planned in the near future.

     ''Cambridge Viscosity viscometers were selected because of their reputation in the industry as a superior productand the company’s rapid response tothe shipping company's installation schedule,''saysCambridge President Robert Kasameyer.The shipping company will integrate the VISCOfuel 2000 into a third-party controller alreadyon board the vessel to maintain the viscosity of marine fuel for proper combustion.

     Controlling the viscosity of heavy fuel oils has long been a challenge for the industry. In the past, machine operators maintained proper viscosity by controlling fuel oil temperature. This required establishing the proper temperature control set point toyield the correct viscosity for a given grade of fuel oil. Oil manufacturers developed viscosity vs. temperature tables for the various grades of fuel to assist operators in determining theproper set point.Theproblem with this method was that fuel oil viscosity/temperature tables were based on expected values for the various blends of heavy fuel, not the actual fuel oil batch that was to be burned.

    In reality, the viscosity index for heavy fuel blends varies considerably from batch to batch. These batch-to-batch variations of viscosity index make it impossible to maintain proper viscosity control with one specific temperature set point.The difficulties caused by the inconsistency of fuel can include emissions problems,excessive maintenance and the overall inefficiency of burning.

    The industry realized that not all heavy fuel oils are created equal and that in order to achieve optimal combustion, the variability of heavy fuel viscosity needed to be controlled. The result has been the successful use of inline viscometers, the‘cruise control’ of heavy fuel viscosity management.

   Operators simply enter a control set point and the viscometer maintains it even if the viscosity index of the fueloil supply increases (up hill) or decreases (down hill) compared to the specification.The Cambridge viscometer used by the shipping company operates on patented electromagnetic-based sensor technology that analyzes the piston's two-way travel time to provide a direct measure of fuel oil viscosity. The VISCOfuel 2000 also features software designed specifically for fuel oil combustion applications.

About Cambridge Viscosity

Cambridge Viscosity, a leader in advanced laboratory and production viscometer systems, provides automated viscometers used worldwide by pharmaceutical and medical device companies to optimize their product andprocess performance. Cambridge's global reach is important for providing application engineering support andservice wherever and whenever needed.Cambridge Viscosity's sensors and viscometer systems conform toASTM,DIN, JIS and ISO standards, with a range of models designed to meet specific industry and application needs. Certifications include ATEX, CE, and FM. CSA certification is available upon request.

（来源：苏州泰恩机电设备有限公司）

粘度是液体流动时流体的内阻力，也就是油品的内摩擦力，是表示油品油性和流动性的一项指标。黏度越大，油膜强度越高，而流动性越差。一般所讲润滑油膜的厚薄就是指黏度的大小。黏度越高的油品，所形成的油膜会越强，但液体流动阻力亦会增加。

润滑油的黏度对润滑的效果影响很大，而温度则是影响黏度的一个Z重要的参数。温度变化时，润滑油的黏度也随著变化，温度升高则黏度变小，温度降低则黏度变大。为了使机器得到良好的润滑，就需要润滑油在机器的工作温度范围内保持合适的黏度。需要说明的是， 黏度指数也不是一个的表示油品黏温特性的参数。例如它只能表示润滑油从40℃到100℃之  间黏 温曲线的平缓度，不一定能说明实用上极为重要的40℃以下、100℃以上的黏温特性。 

  山东盛泰仪器厂家推出的SH112C全自动运动粘度仪适用，可测量透明及不透明液体到同样精度，包括原油、轻重质燃料油、润滑油、添加剂、废油的运动粘度。也适用于测量含蜡量高样品，或含有在室温下不溶化成分样品的运动粘度。全自动进样、恒温、粘度测试、清洗、干燥粘度计，不需人员随机操作，操作员在放样后，可以离开现场，仪器可以自动完成全部任务。

仪器手动模式可以使用普通品氏粘度计，或用于测试难检测试样，同时可以使用手动点击计时，自动计算，自动打印，自动清洗，自动烘干等功能。

  具有粘度计参数存储功能，可存储10支粘度计系数。

 可存储80组实验数据，可方便查找测试记录，并可随时打印和删除结果。