Air-cooled and water-cooled options for pumps
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Are rinsing and cooling the same thing? Shaft seals and flushing plans are generally matched, so what should I do if there is no seal? No need to rinse? And how to choose between air cooling and water cooling? Version 11 recommends air cooling, so under what conditions can air cooling be selected?
Flushing generally refers to sealing. 1. It is used to take away the heat generated by seal friction, 2. to lubricate the seal! The air cooling or water cooling you mentioned should refer to cooling the bearings. Generally, there are two types. Water cooling has good cooling effect and fast speed, but will cause water consumption and increase auxiliary equipment. ! Although the air cooling effect is not as good as that of water cooling, it does not have the disadvantages of water cooling. It does not require auxiliary equipment and consumes less! The cooling effect is much worse than water cooling! There will be a certain amount of power consumption!
So when can I choose air cooling? Is water cooling necessary?
When the temperature is not too high and there is no condition for water cooling on site!
Flushing generally refers to mechanical seals, because corrosion will double for every 10 degrees increase in temperature, so the temperature of the seal cavity must be controlled. For the 23 and 53B solutions, air-cooled heat exchangers can be selected. Generally used when there is no cooling water supply. Air cooling can be forced cooling with a fan. The choice mainly depends on the site conditions and the heat exchange power.
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Flushing is for the mechanical seal. Air cooling and water cooling are for bearing boxes. The reason why API610 11th edition recommends the use of air cooling is: 1. The cooling effect of water cooling will become worse and worse as time goes by, such as the decrease in cooling efficiency caused by internal scaling. 2. If the cooling coil leaks, it will cause fatal damage to the bearing box bearings. Therefore, air cooling is the first choice when the temperature of the bearing box can be met. If air cooling cannot achieve the corresponding effect, then water cooling is still needed. Therefore, the use of air cooling or water cooling has nothing to do with whether there is cooling water nearby, but is directly related to the operating temperature of the pump.
This operating temperature refers to,,, for example, if I have a clean water pump that pumps liquid with a maximum temperature of 45 degrees, does it require water cooling?
At the temperature you mentioned, there is no need to add any bearing cooling. The reason for adding cooling to the bearing box is to consider that under high temperature conditions, the temperature will be transmitted to the bearing box and have an impact on the lubricating oil (the lubricating oil will coke or reduce the viscosity under high temperature conditions, which will harm the use of the bearing.
But when the bearing rotates at high speed, the temperature generated is not only as high as the operating temperature of the liquid in the pump. In this case, what is the basis for judging whether to use water cooling?