Discussion on multi-stage centrifugal pump issues
Thread Content
In the use of multi-stage centrifugal pumps, a common problem arises: the tie rod bolts can suddenly break while the pump is in operation and shoot out like bullets, which is very dangerous. Do any of you experts have any good ways to handle or deal with this?
I haven’t encountered this situation before. However, as long as the axial play is adjusted properly and the balance of axial forces is taken into account, it should be fine
To address this issue fundamentally, it is necessary to find the cause of the bolt failure; I agree with the view expressed above
The situation described by the original poster definitely should not be something that “happens frequently”! If what the original poster is saying is true, there might be serious defects in the design or manufacturing of the pump; it is recommended to use a pump from a reputable manufacturer! It is also possible that during reassembly after maintenance, the tie rod bolts were not tightened one by one and step by step as required by the instructions, resulting in excessive stress on individual bolts. It shouldn’t be an issue with axial force.
In the use of multi-stage centrifugal pumps, if such problems occur frequently, it becomes a major hassle. I’ve worked in a refinery for over 10 years, and this is the first time I’ve heard of a situation where a tie rod bolt breaks suddenly while the pump is in operation. Whether it was one piece that broke or an individual bolt – it’s like a bullet; it’s terrifying, and it’s highly unlikely to happen.
There is an issue with the description on the first floor: \"In the use of multi-stage centrifugal pumps, a common problem occurs – the tie rod bolts suddenly break off while the pump is in operation and shoot out like bullets, which is very dangerous.\" ”Based on logical reasoning, it’s impossible for a single tie bolt to break free; only when all the bolts break at once can that happen. In such a case, the pump disassembles completely in an instant. This kind of situation occurs frequently. I want to ask: why, after an accident occurs, do people still remain indifferent and allow it to happen again? Are they treating the lives of workers as nothing? The cause has not been identified, no measures to resolve it have been taken, and it continues to operate despite being faulty – this clearly reflects the level of the technical management department.
The problem is very serious. What caused it? It’s not vibration; the bolts that prevent vibration were already loose； Are there any problems in other aspects? Has the pump been disassembled and inspected? This also represents a safety hazard that must be eliminated; there can be no room for carelessness