Pump mechanical sealThe principle is that the dryers can't get away. The pump you're in charge of, the little circle behind the wheel, it's the most delicate part of the whole pump, and it's decided whether to run quietly for three years or two days. If you don't go to school, you'll be able to figure out what i've been doing for 20 years。
Pumping machinerySeal principlesWhat do you mean
In plain words, it's just two pieces that hang around. One of the rings follows the axleRing; the other one is fixed on the pump shell, calledSilent ringI don't know. The end of the ring is so tight that the water is blocked by a gap of just a few millimeters. It's not enoughSpringThe pressure continues in the direction of the ring with a moving ring, so there is no small jump on the pump axis, and neither side is loose. The logic of sealing is not to block; it is to let the water go only through the passage you have specified。
You know when you take the pump, the o circle, the spring, the roller, on the back of the ring, you look at a few little parts, but any one size is wrong, and the pressure distribution of the patch is crooked. The most typical example i've ever seen is the back of the spring, a little bit of pressure, running for a little oscillation, and when the patrol finds out, the end has burned a ditch, and the whole thing is gone。
What do you think about the mechanical sealing of the pumps
Don't just look at the leak. Early malfunctions are hidden: very slight wet marks in the pump's flange, you wipe them off and seep in half an hour, when the seal is not completely broken, but should not have run away. Backwards, with darker colours, there are areas of metallic light ash, which are traces of overheating。
There's a stupid way to work: it's sealed with a hand back immediately after the pump has stopped, and it feels like it's still warm, which means the end is dry. Under normal conditions, seal one layerLiquid filmLubrication, stop the pump for a few seconds. You're still burning up. The membrane is broken. It's time to change。
What's the fear of a pump mechanical seal
I'm scaredDry turnI don't know. Even if the water is cut off for 30 seconds, the end temperature can go up to 300 or 400 degrees, carbonized graphite is burned to ashes and the entire seal is scrapped. It's a hidden killer, with intense fluctuations in the pressure behind the wheel, the thinness of the liquid membrane in the sealed cavity, which is how slowly it grows, and when you see a visible leak, it's halfway through the lifetime。
It's much more than i thought. The axle thrust, the end plane level, and the o-circle were not distorted, and the seals were white. 60% of the work i do in the store is "new seal, leaking" and going over and over. It's not a problem, it's a trick。
There's no such thing as a mechanical seal. And you understand how many millimeters and how many newtons it is, and how many of them are in daily inspection and maintenance, and it will not be deceived by that。
