What are the bellows mechanical seal solutions for high temperature hot oil pumps? -

What are the bellows mechanical seal solutions for high temperature hot oil pumps?
　2020-05-08　　
Bellows mechanical seal solution for high temperature hot oil pump:
For the bellows mechanical seals for high temperature hot oil pumps, the API682 standard provides two flushing and cooling auxiliary measures, Plan 21

Figure 9-2 Hot oil pump seal self-flushing measures

Figure 9-3 The external flushing measures of the hot oil pump seal

Scheme 21 is a self-washing and rapid cooling measure on the back of the static ring. Self-flushing means that the high-temperature oil pressurized at the pump outlet is cooled and cooled and then led to the sealed cavity to directly cool the seal; at the same time, the back of the static ring is generally injected with cooling water to rapidly cool it, and the leakage Exclude in time to avoid accumulation in the sealed area. This scheme is suitable for high-temperature oil with relatively clean conveying medium.
Plan 32 is an external flushing and rapid cooling on the back of the static ring. External flushing is to inject low-temperature clean cooling oil that is compatible with the pumped medium from the outside world into the sealed cavity, directly cool the seals, and remove the solid particles in the medium in time to avoid entering the seal end surface or gathering around the seal to cause abrasion. Grain wear.　　1132.html,

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