Note: Shrinkfitting a steel mud pump liner
Objective:
Shrink fitting a steel liner into a cylinder to create a mud pump liner used in the oil industry
End Product:
mud pump
Equipment:
Ambrell 250 kW, 10 kHz induction heating system, equipped with a remote workhead containing one 53.6μF capacitor. An induction heating coil designed and developed specifically for this application.
Materials:
Steel cylinder 10.625 in (27 cm) OD with a 2.625 in (6.6 cm) thick wall and 21.75 in (55.2 cm) long, liner 5.5 in (14 cm) OD and 26.375 in (67c m) long
Temperature:
900 °F (482 °C)
Frequency:
7.8 kHz
Testing:
An eleven-turn helical coil is used to heat the cylinder. The cylinder is placed inside the coil and power is applied for 10 minutes to reach the temperature of 900 °F (482 °C). Once the temperature is reached the steel liner slides easily into the cylinder and the assembly is cooled to create the shrink fit
Benefits:
Induction heating provides:
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Faster heat cycle
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Increases production rate versus furnace systems
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No preheat cycle or controlled cooldown required, reduces energy cost
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Even distribution of heating
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