Fan and compressor housing for an air cycle machine
First Claim
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1. A housing for an air cycle machine, the housing comprising:
- a housing with a first end and a second end opposite the first end;
a first duct adjacent the first end of the housing with an air inlet and an air outlet;
a second duct adjacent the second end of the housing with an air inlet and an air outlet; and
a collar in the housing extending from a center of the housing towards the first end of the housing, the collar comprising;
a first annular surface facing radially inward and configured to engage a journal bearing;
an annular recess in the first annular surface that is configured to receive a seal ring; and
a second annular surface facing radially inward and configured to engage a rotating shaft, wherein the second annular surface is a uniform, cylindrical surface extending from a first end adjacent a first end of the collar to a second end adjacent the first annular surface, wherein the second annular surface is configured to directly engage the rotating shaft to provide a sealing surface that is monolithic with the housing;
wherein a diameter of the first annular surface is larger than a diameter of the second annular surface; and
wherein the second annular surface is disposed between the first annular surface and the first end of the housing.
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Abstract
A housing for an air cycle machine includes a housing with a first end and a second end opposite the first end, a first duct adjacent the first end of the housing with an air inlet and an air outlet, a second duct adjacent the second end of the housing with an air inlet and an air outlet, and a collar in the housing extending into the second duct. The collar includes a first annular surface facing radially inward and configured to engage a journal bearing and a second annular surface facing radially inward and configured to engage a rotating shaft, wherein the second surface is monolithic with the housing.
27 Citations
15 Claims
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1. A housing for an air cycle machine, the housing comprising:
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a housing with a first end and a second end opposite the first end; a first duct adjacent the first end of the housing with an air inlet and an air outlet; a second duct adjacent the second end of the housing with an air inlet and an air outlet; and a collar in the housing extending from a center of the housing towards the first end of the housing, the collar comprising; a first annular surface facing radially inward and configured to engage a journal bearing; an annular recess in the first annular surface that is configured to receive a seal ring; and a second annular surface facing radially inward and configured to engage a rotating shaft, wherein the second annular surface is a uniform, cylindrical surface extending from a first end adjacent a first end of the collar to a second end adjacent the first annular surface, wherein the second annular surface is configured to directly engage the rotating shaft to provide a sealing surface that is monolithic with the housing; wherein a diameter of the first annular surface is larger than a diameter of the second annular surface; and wherein the second annular surface is disposed between the first annular surface and the first end of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An air cycle machine comprising:
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a tie rod that is configured to rotate about an axis; a fan section with a fan rotor mounted to the tie rod; a compressor section with a compressor rotor mounted to the tie rod; a first turbine section with a first turbine rotor mounted to the tie rod; a first turbine housing; and a fan and compressor housing connected to the first turbine housing, wherein the fan and compressor housing comprises; a first end; a second end adjacent to the first turbine housing and opposite of the first end; a fan duct adjacent to the first end of the fan and compressor housing, wherein the fan rotor is positioned in the fan duct; a compressor duct adjacent to the second end of the fan and compressor housing, wherein the compressor rotor is positioned in the compressor duct; and an annular collar in the fan and compressor housing and extending towards the first end of the fan and compressor housing, wherein the annular collar comprises; a first annular surface facing radially inward to engage a journal bearing; an annular recess in the first annular surface that is configured to receive a seal ring; and a second annular surface facing radially inward to engage a rotating shaft, wherein the second annular surface is a uniform, cylindrical surface extending from a first end adjacent a first end of the collar to a second end adjacent the first annular surface, wherein the second annular surface is configured to directly engage the rotating shaft to provide a sealing surface that is monolithic with the fan and compressor housing; wherein a diameter of the first annular surface is larger than a diameter of the second annular surface; and wherein the second annular surface is disposed between the first annular surface and the first end of the fan and compressor housing. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification