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US3821569A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric machine rotor

Assignee: Individual
•
Filing: 1972-11-16
•
Granted: 1974-06-28
•
Expires: 1992-11-16
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Abstract

Abstract The rotor structure of an electric machine rated at up to 2,000 mV and above, the rotor having a winding made up of pipes or hollow conductors through which a cooling liquid is passed. The rotor structure is characterized in a construction to provide the feed of a liquid coolant to the hollow conductors of the rotor winding from the shaft grooves as well as the discharge of the liquid coolant from the hollow conductors of the rotor winding into the shaft grooves. It employs a hydraulic manifold mounted on an overhanging retainer ring and comprising a pressure chamber and an overflow chamber as well as longitudinal channels, the pressure and overflow chambers being disposed intermediate of the longitudinal channels and the manifold surface facing the rotor shaft, which longitudinal channels communicate with the chambers by way of channels lying in the radial planes of the manifold. The hydraulic manifold is connected with the rotor winding conductors by means of endpieces fixed on each pair of conductors and fitting into the longitudinal channels of the manifold, and with the rotor shaft via longitudinal mounted pipes. One end of each pipe fits into one of the shaft grooves at the base of the steel housing of the rotor shaft, whereas the other end fits into that manifold orifice which communicates with either the pressure chambers, or the overflow chamber.

Inventors

  • 👤 N Sippol
  • 👤 A Saly

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 04:37
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/22; H02K9/00

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 164 words
An electric machine rotor comprising a shaft with longitudinal bores therein, a winding on said shaft including hollow conductors through which a liquid coolant is to be passed, and a hydraulic manifold rigidly secured to said shaft and having a surface facing said shaft, said manifold comprising at least one pressure chamber and at least one overflow chamber, communicating with the hollow conductors of the winding by the provision of at least two longitudinal channels in the manifold, said manifold having an end surface which serves as the end surface of the rotor, said longitudinal channels extending to said end surface, said manifold having radial channels connecting the longitudinal channels with said manifold chambers, said pressure chamber and said overflow chamber being disposed between the longitudinal channels and said surface of the manifold which faces the rotor shaft, said longitudinal channels having open orifices at said end surface of the manifold, and removable stopper elements in said channels at said orifices closing said channels.
Claim 2
Dependent Claim 164 words
An electric machine rotor comprising a shaft with longitudinal bores therein, a winding on said shaft including hollow conductors through which a liquid coolant is to be passed, and a hydraulic manifold rigidly secured to said shaft and having a surface facing said shaft, said manifold comprising at least one pressure chamber and at least one overflow chamber, communicating with the hollow conductors of the winding by the provision of at least two longitudinal channels in the manifold, said manifold having an end surface which serves as the end surface of the rotor, said longitudinal channels extending to said end surface, said manifold having radial channels connecting the longitudinal channels with said manifold chambers, said pressure chamber and said overflow chamber being disposed between the longitudinal channels and said surface of the manifold which faces the rotor shaft, said longitudinal channels having open orifices at said end surface of the manifold, and removable stopper elements in said channels at said orifices closing said channels.
Claim 3
Dependent Claim 19 words
An electric machine rotor as claimed in claim 1, wherein said removable stopper elements are threaded in said channels.
Claim 4
Dependent Claim 58 words
An electric machine rotor as claimed in claim 1, wherein said pressure chamber and said overflow chamber in the manifold communicate with the bores in said shaft by at least two longitudinally mounted pipes, each pipe having one end fixed in said manifold and the other end fixed at the base of a steel housing of the shaft.
Claim 5
Dependent Claim 21 words
An electric machine rotor as claimed in claim 3 wherein said pipes are disposed within slots provided in the rotor shaft.
Claim 6
Dependent Claim 20 words
An electric machine rotor as claimed in claim 3 comprising sealing means at each of said ends of the pipes.
Claim 7
Dependent Claim 30 words
An electric machine rotor as claimed in claim 1 comprising a cantilever ring having one end secured to said shaft and a free end to which said manifold is fixed.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-06-27 1977-12-27 1978-06-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-27 1981-12-27 1982-06-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-27 1985-12-27 1986-06-28 $7700.00 Window Closed / Lapsed

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