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US 10,371,172 B2Granted
Reduction of turbocharger core unbalance with balance washer
AssigneeBorgWarner Inc.
InventorDenny King
Life of this patent
Estimating the term…
Abstract
Turbochargers operate at extremely high speed, so balance of the rotating core is of the utmost importance to turbocharger life. A special balancing washer is added to the clamping region between the compressor nut and the nose of the compressor wheel to aid in keeping the wheel, nut, and stub-shaft on the turbocharger axis and to thereby prevent introduction of core unbalance.
Claims13
A rotating assembly, comprising
- a shaft (52) with a turbine end and including a reduced diameter stub shaft (56) part with a threaded end,
- a turbine wheel (51) rigidly connected to the turbine end of the shaft to form a shaft-and-wheel assembly (50),
- a compressor wheel (20) held in position on the stub shaft (56) by the clamp load from a compressor nut (30) threaded onto said threaded end of the shaft, and
- a balance washer (36, 37) provided between the nut and the compressor wheel, wherein the balance washer has a parallelism of ≤0.001″.
1 more element
A rotating assembly, comprising
- a shaft (52) with a turbine end and including a reduced diameter stub shaft (56) part with a threaded end,
- a turbine wheel (51) rigidly connected to the turbine end of the shaft to form a shaft-and-wheel assembly (50),
- a compressor wheel (20) held in position on the stub shaft (56) by a clamp load from a compressor nut (30) threaded onto said threaded end of the shaft, and
- a balance washer (36, 37) provided between the nut and the compressor wheel, wherein the balance washer has a parallelism of ≤0.001″ and a thickness of 0.076 mm to 0.51 mm.
1 more element
A rotating assembly, comprising
- a shaft (52) with a turbine end and including a reduced diameter stub shaft (56) part with a threaded end,
- a turbine wheel (51) rigidly connected to the turbine end of the shaft to form a shaft-and-wheel assembly (50),
- a compressor wheel (20) held in position on the stub shaft (56) by a clamp load from a compressor nut (30) threaded onto said threaded end of the shaft, and
- a balance washer (36, 37) provided between the nut and the compressor wheel, wherein the balance washer has a parallelism of ≤0.001″ and a thickness of from 0.25 mm to 0.38 mm.
1 more element
Dependencies are inferred from the claim text.