Large electrical generators rotate in hydrogen to reduce friction losses. Oil flooded, floating ring seals are a part of the pressure boundary to prevent hydrogen leakage. These hydrogen seals, often babbitted and sometimes referred to as “hydrogen (H2) gland seals”, have very precise geometry to maintain proper sealing over a range of operating conditions.
We have more than 35 years of experience in manufacturing new seals for our OEM customers and re-casting worn seals, where feasible, for end users operating a variety of generator designs.
The bracket for hydrogen gland seals on the ends of large electrical generators requires precision machining to achieve the fits and clearances required for reliable sealing of the hydrogen within the generator. With aging and maintenance, the geometry of these brackets may have sufficiently changed to result in excessive leakage or premature seal damage. Pioneer can assist customers in restoring the original fit dimensions, or in adapting a bracket to accommodate journal damage.
By teaming our manufacturing and repair services with a first-rate bearing engineering department, we can help our customers operate turbines and generators more efficiently and reliably over an extended life.