A turbo pump is solely a propellant pump which has two main components, specifically a driving gas turbine and a rotodynamic pump, which is mounted on a shaft. Turbopump functions to produce high pressure liquid which is used to feed the combustion chamber.
Two common types of turbopumps are axial flow pumps which have static, reciprocating blades that progressively increase the fluid pressure, and centrifugal pumps in which pumping is achieved by expelling fluid at high velocity.
Centrifugal pumps are much more powerful for high density liquids. However, they require a larger diameter when handling low density liquids. Axial flow pumps do have a smaller diameter and supply a modest increase in pressure. There are several stages of compression required for this sort of pump and they work well with low density liquids.
With that said, here are 5 tips for rebuilding a turbo pump:
- Check Turbo Pump First
Before starting the process of rebuilding a turbo pump, it is crucial that it be inspected for damage, any parts that may be missing, and any accessories included such as fans, valves, adapters, and the like. The pump can even be tested with the proper controller to check for any problems that arise.
The turbo pump should be disassembled to carefully examine the internals for damage. The important things to check are the turbine, motor windings, shaft, coolant connections, rotor and stator.
- Perform Cleaning On Parts
Disassembled turbopump parts can be thoroughly cleaned using standard cleaning methods specifically made for each part. After cleaning is complete, the pump can be reassembled using a new axis, O-rings, lubricating nuts or washers, and ultra-precise ceramic bearings. This must be done at an ABEC precision rating of 7 or higher.
- Do Balancing In Steps
The turbo pump rotor assembly must be gradually balanced. The first step should be low speed balance and then increase to full speed balance while under vacuum. An example of a more precise balance quality level compared to OEM specifications is G-1 (ISO 1940/1 & ANSI S2.19). It is also important to print a pump balance report.
- Install Stator Rings After Balancing
The stator ring on the turbopump must be installed after balancing is finished for safety purposes. After installing it, the pump should be ready to be tested. Testing must be carried out for at least 24 hours. During the test, parameters such as pressure, speed and current should all be monitored to check for deviations from the nominal.
- Rebuilt Turbo Pump Packaging
Once the turbopump is fully rebuilt, it must be bagged in plastic and then packed in a box which has a foam system in place. This foam is formulated in a special way to keep the pump protected from damage.
Conclusion
These five tips go a long way in rebuilding the turbo pump. If you are trying to find a quality pump, here are our recommendations for the best rebuild turbo pump online.
