WB type vortex pump is a low flow (minimum 0.36m3/h) high head (maximum 180m) chemical pump used to transport liquids without solid particles at temperatures ranging from -20 ℃ to+300 ℃, with viscosity not exceeding 5 ° E, corrosive and non corrosive (depending on the material). The main characteristics are high working pressure and use for corrosive organic solvents.
At present, similar products in the WB type vortex pump market generally use external (internal) large spring or corrugated tube mechanical seals for mechanical seals. The former uses a fluorine rubber ring with poor corrosion resistance in its structure, while the latter is prone to slipping when working under high pressure, making its usage situation very unsatisfactory.
In order to avoid the defects in the pump structure (mechanical seal installation form) in the above aspects, our factory has established a technical research group led by the factory director, and successfully developed the MS series internal self cooling silicon carbide mechanical seal. The sealing structure is a corrugated tube with an enlarged spring outside, and the pump structure has been modified (see attached mechanical seal structure diagram). The assembly method: first assemble the bracket assembly and pump shaft, fix the sealing dynamic ring-2 on the pump shaft with thrust screws, install the static ring-4 on the sealing base-3, then assemble the pump body-1, and connect the sealing seat with the static ring to the pump body with screws. This sealing form has the advantages of compact structure, good safety performance, high pressure resistance, and long service life. If there is inevitable dehydration, a water cooling device can be added to the sealing end cover according to user requirements. After adding cooling water, the user can use the product at a temperature of up to 250 ℃. The modified product has been on the market for nearly three years, and the user feedback has been very good. The service life of this product is 3-5 times that of similar products, and it basically does not need maintenance during use. It not only improves production efficiency but also eliminates the phenomena of "running", "emitting", "dripping", and "leaking" in the production process of chemical enterprises. It is a new type of energy-saving and environmentally friendly product.