What happens if the pump fails to build pressure and continues to run for a long time? ? ?
Thread Content
Once the liquid in the tank truck has been emptied, the pump can no longer generate pressure. What are the consequences of operating in this condition for an extended period of time? What series of problems might arise? What is the main cause of this issue – overheating, or something else? ? ? Recently, I encountered this issue in two situations; at the time I knew it was definitely the wrong approach. What I mean is, where do the problems arising from these oversights originate from? We can resolve the issue as soon as possible.
Can it be understood that the liquid in the tank truck is gone, but the pump is still running? If that’s the case, isn’t the pump running idly? Idle running of the pump causes significant and thorough damage to it. Vulnerable parts will almost certainly wear away through dry friction.
Like machine seals? Thank you very much. Could you please explain in detail which areas they are? It seems that our mechanical seal is leaking. What is meant by \"idle operation\"? Electrical energy is converted into mechanical energy and internal energy; the liquid being transported takes away some of the heat. During idle operation, there is more internal energy, meaning that the heat cannot be dissipated. With too much heat, does the equipment become soft and deform? Is my understanding correct? Thank you. Please help analyze it.
Dry grinding of the mechanical seal results in leakage. Idle operation refers to the pump continuing to work and rotate when no liquid material enters its chamber. It’s just idling; the liquid in the material also serves to cool and lubricate the pump equipment. Without materials, it’s just dry grinding. What I said about taking away some heat can also be understood as a cooling effect.
This is equivalent to the pump running idle; the most direct consequence is the complete destruction of the mechanical seal. It also causes vibration in the pump, and the sealing rings in various parts suffer wear to varying degrees. This applies only to single-stage centrifugal pumps. If it has multiple stages, the entire pump will have to be discarded
If the pump runs idle for a long time, the shaft temperature will rise, causing the bearings to be damaged
When there is no liquid in the pump chamber, dry friction between the mechanical seal components can wear out the seal surface, leading to leaks. In cases where there is a shaft sleeve, that sleeve as well can get worn out. In more severe situations (which has happened to me), if the outlet valve isn’t opened after starting the pump, the pump keeps running idle, and eventually the pump casing (in the case of a fiberglass pump) bursts.
The pump you mentioned is likely to be a regular single-stage centrifugal pump; there should be no problems with the bearings. In the case of a magnetic pump or a canned pump, both the bearings and the impeller are damaged, the shaft of the magnetic pump is also ruined, while in a canned pump the shaft bends and the inducer wheel wears out. Generally, single-stage horizontal centrifugal pumps belong to the AY series. For pumps equipped with single-face bellows seals, when the pump runs without any fluid inside it, the sealing surfaces cannot be lubricated or cooled, and within less than 10 seconds the seal is usually damaged – the sealing surfaces get burned out and the bellows break. This means that the seal will leak whenever the pump is filled with fluid again. It is important to note the following: 1. The pump must not be run without fluid; there should be no gas inside it. 2. The pump must always contain fluid; it is absolutely forbidden for it to run without any fluid. 3. Training on equipment operation is essential; those who have not received proper training should not operate such equipment