Impeller attach mechanism
AssigneeProgress Rail Locomotive Inc.
InventorsGary R. SVIHLA, Xinmin Xu
Life of this patent
Estimating the term…
Abstract
An impeller attach mechanism for a turbocharger including a stud extending from a central bore of a compressor impeller toward a turbine wheel, the stud having a first threaded region and a second threaded region; a shaft coupled to the turbine wheel and extending toward the compressor impeller, the shaft having a leading portion, the leading portion having a threaded interior configured to engage the second threaded region of the stud; and an insert having an internal portion and an external portion, the internal portion having a threaded external surface to engage the compressor impeller, the internal portion having a threaded internal surface to engage the first threaded region of the stud, the external portion configured to surround the leading portion of the shaft.
Claims20
An impeller attach mechanism for a turbocharger, the impeller attach mechanism comprising:
- a stud extending from a central bore of a compressor impeller toward a turbine wheel, the stud having a first threaded region and a second threaded region;
- a shaft coupled to the turbine wheel and extending toward the compressor impeller, the shaft having a leading portion, the leading portion having a threaded interior configured to engage the second threaded region of the stud;
- and
- an insert having an internal portion and an external portion, the internal portion having a threaded external surface to engage the compressor impeller, the internal portion having a threaded internal surface to engage the first threaded region of the stud, the external portion configured to surround the leading portion of the shaft.
An impeller attach mechanism for a turbocharger, the impeller attach mechanism comprising:
- a stud extending from a central bore of a compressor impeller, the stud having a first threaded region and a second threaded region;
- a shaft coupled to a turbine wheel, the shaft having a leading portion with a threaded interior configured to engage the second threaded region of the stud;
- an insert having an internal portion and an external portion, the internal portion housed within the compressor impeller, the internal portion having a threaded internal surface to engage the first threaded region of the stud, the external portion configured to engage an external surface of the leading portion of the shaft;
- a thrust washer having a washer bore;
- and
- an impeller collar having a turbine side extension radially disposed in the washer bore between the shaft and the thrust washer.
A turbocharger, the turbocharger comprising:
- a turbine wheel;
- a compressor impeller having a central bore, the compressor impeller including a hub extension protruding toward the turbine wheel;
- a stud extending from the central bore of the compressor impeller, the stud having a first threaded region and a second threaded region;
- a shaft coupled to the turbine wheel, the shaft having a leading portion, the leading portion having a threaded interior configured to engage the second threaded region of the stud;
- and
- an insert having an internal portion and an external portion, the internal portion having a threaded internal surface to engage the first threaded region of the stud,
- the internal portion of the insert dimensioned to radially encase the first threaded region of the stud, the hub extension dimensioned to radially encase the internal portion of the insert, the leading portion of the shaft dimensioned to radially encase the second threaded region of the stud, and the external portion of the insert dimensioned to configured to radially encase the leading portion of the shaft.
Dependencies are inferred from the claim text.