VAF instruments VISCOSENSE 2, Technical Manual

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48
VAF Instruments delivers the ViscoSense
®
2 with housing. Refer to the table below for flow rate
corresponding to the size of housing: VAF
提供之
ViscoSense
®
2
具有专门的探头安放仓室。参见下表
以获得与仓室尺寸相对应之流速：
Fluid flow rate in piping
管路中的流速
(Recommended for correct control function)
（为实现正确的控制功能而推荐）
All at 0-50 mPa.s
黏度均在
0-50mPa.s
范围内
2” - Max 20 m3/h, Min 7m
3
/h
2.5” - Max 34 m3/h, Min 12m
3
/h
3” - Max 51 m3/h, Min 18m
3
/h
4” - Max 80 m3/h, Min 28m
3
/h
For lower flow rates a smaller pipe diameter is
recommended.
对较低流速建议采用更小尺寸的管路
Mixing tank
混油桶
The mixing tank is an important part of the booster system that has several functions.
混油桶系供油
单元中的一个重要部件。它具有如下几项功能。

The mixing of MDO and HFO to a homogeneous emulsion.
混合重油及柴油达到均质状态

The mixing of hot ( +/- 130° C ) with colder (+/- 80 °C ) fuel, to a fuel with a single
temperature
充分混合热油（
±130° C
）及低温油（
±80°C
）达到具有单一温度的燃油

Compensation of pressure pulses
弥补压力波动

Prevention of a thermal shock of the engine when changing over from HFO to MDO.
防止系
统在重油转换至柴油时产生热冲击
Remarks
备注

If hot and cold HFO is not mixed well, it can result in incorrect viscosity measurements, which
will result in an incorrect viscosity control of the system
如果冷热油未充分混合，会导致粘度
测定不准。这样将会引起系统粘度控制的误动作。

High or constant pressure pulses in the system can lead to damage to the ViscoSense
®
2 or
other components of the booster unit.
系统中压力波动较大并持续时，会导致
ViscoSense
®
2
传感器和
/
或单元中其它部件的损坏。
Fuel filters
过滤器
There should be two fuel filters, placed parallel. One should be clean and on standby.
系统中应当采
用两个并行放置之滤器。其中一台应当清洁并调整妥当备用。
Fuel filters should be placed in the HFO supply to the booster.
过滤器应安装于重油供油管路增压推
进泵前

The fuel flow is less; therefore the filter can be smaller.
燃油流速较低时可选用更小的过滤器

The fuel temperature is lower and the fuel is more stable.
燃油温度越低，越稳定。