Issue with replacing the pump oil level sight glass with an automatic oil refilling cup
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This post was last edited by yxmqh on 2010-3-4 at 13:46. In the factory, the oil level viewports of many pump bearing housings are easily covered by lubricating oil on their inner surfaces; as a result, staff cannot see the oil level clearly during inspections, which can lead to low oil levels and subsequent bearing damage. Consider replacing the sight glass with an oil reservoir that auto-fills oil to avoid such problems. But there are a few points I’d like to clarify: 1. What factors should be considered when switching to an oil filler cap with automatic oil refilling? 2. In what situations are pumps equipped with automatic oil refill cups used? In other words, which types of pumps should have automatic oil refill cups? 3. Can it be modified by oneself? Is it necessary to have a professional pump manufacturer conduct an evaluation? I hope everyone can give some suggestions. Thank you.
OP, what you mean is: a constant-level oil cup, that is, an automatic oil-refilling vacuum oil cup. Always maintain a constant level of lubricating oil in the bearing housing. Don’t most centrifugal pumps these days come equipped with such oil cups? It’s possible to modify them, and the user can conduct experiments to determine the appropriate level of oil. As long as the liquid level in the bearing box window is below 1/3, the oil cup will automatically top up the oil.
1. Determine the original oil level line or the oil level line to be achieved. Understand the principle of oil cups–to ensure the required oil level is maintained. 2. Rolling bearings are generally used in pumps with oil immersion lubrication. Automatic refueling, extending the refueling interval. 3. It can be modified by the user. You can also consult the original pump manufacturer at the same time
Thank you to the two people above. Just by looking at the introductions of the two products, it’s not entirely clear as to how the oil reservoirs are refilled; it’s uncertain whether the modification will be complicated, or if there is a risk of oil leakage, etc. Are there any introductory materials I can refer to?
It is recommended to consult the original pump manufacturer first, as I have seen cases where the oil filling cup leaked oil; upon inspection, it was found that the position of the opening in the cup was incorrect. If the position is wrong, the oil in the filling cup will flow into the lubrication chamber, causing the liquid level to rise above that of the bearings and resulting in oil leakage.
The position of the oil cup is crucial; if it is too high, all the oil will flow into the bearing housing, and if it is too low, it won’t serve any purpose in replenishing oil. The oil cup can be purchased directly from the manufacturer; its installation position should be at the same level as the bottom of the oil sight glass, and it can be installed directly on one of the sight glasses.
Ask the manufacturer for a manual; it will be clear once you read it
This post was last edited by llbear on 2010-3-4 at 10:42. Experienced technicians say it’s best not to make any changes; as everyone has said, if the installation location is incorrect, problems are likely to arise. Moreover, the sight glass serves a purpose; if its inner surface gets dirty, it needs to be cleaned regularly during maintenance and refueling. After making the changes, it’s not guaranteed that the oil cup will work properly; I’m not sure. Moreover, the original pumps do not have any openings designed for installing oil cups; if an oil cup is to be installed, either the existing sight glass opening must be replaced (with a shorting), or new holes must be drilled in the bearing housing. There is a great risk. Everyone, please give some advice.
Pumps lubricated with thin oil can be lubricated using oil cups that provide automatic refilling; the modification process is relatively simple. During installation, it is important to ensure that the oil pipes are not blocked (as this can happen due to sealing tapes). The key factor is to choose an appropriate height for the oil cup, otherwise the system will not function properly. Currently, there are automatic level controllers that consist of two separate oil storage tanks, which are effective and easy to adjust; however, they are also more expensive.
The pump operators in our unit have a tough job! If the refueling time is extended or automatic refueling is used, it will save a lot of human resources.
There is a discussion on oil cups here: http://bbs.hcbbs.com/thread-437344-1-1.html 1. What factors should be considered when switching to an oil cup that automatically refills oil? Clarify the working principle of the automatic oil refilling cup ； Installation position and method of the oil cup ； The connection method between the oil cup and the pump body, as well as the preparation of related components ； Adjust the oil level in the oil cup to meet the pump’s operating requirements. 2. In what situations are pumps equipped with automatic oil refill cups used? In other words, which types of pumps should have automatic oil refill cups? Equipment equipped with oil sump (light oil) lubrication can all use automatic oil refilling cups. 3. Can it be modified by oneself? Is it necessary to have a professional pump manufacturer conduct an evaluation? It can be modified by oneself. It’s easy to purchase an oil cup, but one should pay attention to the way it is connected to the pump, whether it leaks easily, and whether the connection is neat and reliable. If possible, have the supplier of the oil cup provide these necessary components according to your actual requirements, and have them handle the installation as well. Will professional pump manufacturers be willing to provide you with an assessment? You can’t make any money, and yet you still have to take responsibility. The automatic refueling oil cup below is really beautiful. The price is also quite high.