How to reduce the temperature of the centrifugal pump seal

1. The domestic centrifugal pump is provided with a cooling water jacket around the sealed chamber, and is cooled by cold water, so that the temperature of the sealed chamber can be lowered to 200~250 °C.
2. For single-end seals, injection flushing is used to clean the wax oil at a temperature of about 100 °C (usually without diesel, because diesel is a finished product), which not only reduces the temperature but also improves the working environment. Way.
3. The outside of the gland is made of quench water; in addition to lowering the temperature, it can prevent the sewer line from being blocked.

The sealing structure used is:

1. Single-end seal: It adopts injection-type flushing, and the rinse liquid is reduced by about 2 °C at about 100 °C, and the pressure is 0.05~0.15Mpa higher than that in the sealed cavity. The outside of the gland is hot water (soft water) for quenching. Generally one cycle (ten months) can be used.
2, metal bellows machine seal: compact structure, easy to install, in the same auxiliary system, the life is 2 to 3 times the ordinary seal.
3, double-face machine seal: using cycle flushing, plus external cooling, the life is 1.5 ~ 2 times the single end.
4. The friction pair is hard and hard (YG6/YG8, SiC/SiC, etc.), which has a good effect on a medium with high viscosity, a small amount of solid particles or a medium produced by crystallization.