WO2014134582A2 - Joints étanches aux gaz pour applications d'arbre rotatif à température élevée - Google Patents

Joints étanches aux gaz pour applications d'arbre rotatif à température élevée Download PDF

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Publication number
WO2014134582A2
WO2014134582A2 PCT/US2014/019700 US2014019700W WO2014134582A2 WO 2014134582 A2 WO2014134582 A2 WO 2014134582A2 US 2014019700 W US2014019700 W US 2014019700W WO 2014134582 A2 WO2014134582 A2 WO 2014134582A2
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
drive assembly
oil
proximal end
gas seal
Prior art date
Application number
PCT/US2014/019700
Other languages
English (en)
Other versions
WO2014134582A3 (fr
Inventor
Michael O'brian
Zia Abdullah
Slawomir Winecki
Original Assignee
Battelle Memorial Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Battelle Memorial Institute filed Critical Battelle Memorial Institute
Publication of WO2014134582A2 publication Critical patent/WO2014134582A2/fr
Publication of WO2014134582A3 publication Critical patent/WO2014134582A3/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/303—Parts of ball or roller bearings of hybrid bearings, e.g. rolling bearings with steel races and ceramic rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/762—Sealings of ball or roller bearings by means of a fluid
    • F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/073—Fixing them on the shaft or housing with interposition of an element between shaft and inner race ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C37/00—Cooling of bearings
    • F16C37/007—Cooling of bearings of rolling bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/20—Thermal properties
    • F16C2202/24—Insulating

Definitions

  • a drive assembly for transferring rotational force from an ambient temperature zone to a hot temperature zone, the drive assembly comprising: a shaft comprising a pulley at its proximal end and a rotating equipment element at its distal end, wherein the proximal end of the shaft is oriented in an ambient temperature zone and the disial end of the shaft is oriented in a hot temperature zone; at least one bearing encircling the shaft near its proximal end; at least one ceramic bearing encircling the shaft near its distal end; and a first gas seal encircling the shaft near its proximal end and a second gas seal encircling the shaft near its proximal end, wherein an oil is contained between the first gas seal and the second gas seal.
  • a drive assembly for transferring rotational force from an ambient temperature zone to a hot temperature zone
  • the drive assembly comprising: a shaft comprising an input element at its proximal end and a rotating equipment element at its distal end; at least one bearing encircling the shaft near its proximal end; at least one bearing encircling the shaft near its distal end; and a first gas seal encircling the shaft near its proximal end and a second gas seal encircling the shaft near its proximal end, wherein an oil is contained between the first gas seal and the second gas seal.
  • a drive assembly for transferring rotational force from an ambient temperature zone to a hot temperature zone, the drive assembly comprising: a shaft comprising a pulley at its proximal end and a rotating equipment element at its distal end, wherein the shaft is at least partially hollow, wherein the proximal end of the shaft is oriented in an ambient temperature zone and the distal end of the shaft is oriented in a hot temperature zone; a cooling gas, wherein the cooling gas is injected into the interior of the at least partially hollo section of the shaft; at least one bearing encircling the shaft near its proximal end; at least one ceramic bearing encircling the shaft near its distal end; a first gas seal encircling the shaft near its proximal end and a second gas seal encircling the shaft near its proximal end, wherein an oil is contained betwee the first gas seal and the second gas seal.
  • a drive assembly for transferring rotational force from an ambient temperature zone to a hot temperature zone, the drive assembly comprising: a hollow housing; a shaft comprising a pulley at its proximal end and a rotating equip meni element at its distal end, wherein the shaft extends through at least a portion of the hollow housing, wherein the proximal end of the shaft is oriented in an ambient temperature zone and the distal end of the shaft is oriented in a hot temperature zone; a coolant, wherein the coolant is circulated through the interior of the hollow housing and is in thermodynamic contact with at least a portion of the shaft; at least one bearing encircling the shaft near its proximal end; at least one bearing encircling the shaft near its distal end; a first gas seal encircling the shaft near its proximal end and a second gas seal encircling ihe shaft near its proximal end, wherein an oil is contained between the first gas seal and the second gas
  • a thermal break insert assembly comprising: a shaft comprising a first shaft material and a second shaft material, wherein ihe first shaft material is oriented in a low temperature region and the second shaft material is oriented in a high temperature region; a bearing encircling the shaft longitudinally near a junction between first shaft material and second shaft material; and a thermal break insert disposed radially between the shaft and the bearing.
  • a thermal break insert assembly comprising: a shaft comprising a first shaft material and a second shaft material; a bearing encircling the shaft longitudinally near a junction between first shaft material and second shaft material; and a thermal break insert disposed radially betwee the shaft and the bearing.
  • a drive assembly for transferring rotational force from an ambient temperature zone to a hot temperature zone
  • the drive assembly comprising: a hollow housing comprising a shaft oil inlet and a shaft oil outlet; a shaft comprising a pulley at its proximal end and a rotating equipment element at its distal end, wherein the shaft extends through at least a portion of the hollow housing, wherein at least a portion of the interior of the shaft comprises a shaft cooling channel, wherein the shaft comprises an inlet port at least substantially longitudinally aligned with the shaft oil inlet and in communication with the shaft oil inlet and the shaft cooling channel, wherein the shaft comprises an outlet port at least substantially longitudinally aligned with the shaft oil outlet and in communication with the shaft oil outlet and the shaft cooling channel, wherein the proximal end of the shaft is oriented in an ambient temperature zone and the distal end of the shaft is oriented in a hot temperature zone; an oil, wherein the oil is circulated through the shaft oil inlet, the inlet port,
  • a drive assembly for transferring rotational force from an ambient temperature zone to a hot temperature zone, the drive assembly comprising: a hollow housing comprising a shaft oil inlet and a shaft oil outlet; a shaft comprising a pulley at its proximal end and a rotating equipment element at its distal end, wherein the shaft extends through at least a portion of the hollow housing, wherein at least a portion of the interior of the shaft comprises a shaft cooling channel, wherein the shaft comprises an inlet port at least substantially longitudinally aligned with the shaft oil inlet and in communication with the shaft oil inlet and the shaft cooling channel, wherein the shaft comprises a coolant pumping tab oriented adjacent to the inlet port, wherein the shaft comprises an outlei port at least substantially longitudinally aligned with the shaft oil outlet and in communication with the shaft oil outlet and the shaft cooling channel, wherein the proximal end of the shaft is oriented in an ambient temperature zone and the distal end of the shaft is oriented in a hot temperature zone;
  • a drive assembly for transferring rotational force from an ambient temperature zone to a hot temperature zone
  • the drive assembly comprising: a hollow housing comprising a shaft oil inlet and a shaft oil outlet; a shaft comprising a pulley at its proximal end and a rotating equipment element at its distal end, wherein the shaft extends through at least a portion of the hollow housing, wherein at least a portion of the interior of the shaft comprises a shaft cooling channel, wherein the shaft comprises an inlet port at least substantially longitudinally aligned with the shaft oil inlet and in communication with the shaft oil inlet and the shaft cooling channel, wherein the shaft comprises an outlet port at least substantially longitudinally aligned with the shaft oil outlet and in communication with the shaft oil outlet and the shaft cooling channel, wherein the inlet port comprises an inlet port axis, the outlet port comprises an outlet port axis, and the shaft comprises a central longitudinal axis, and wherein the inlet port axis and outlet port axis do not intersect the central
  • a drive assembly for transferring rotational force from an ambient temperature zone to a hot temperature zone, the drive assembly comprising: a hollow housing comprising a shaft oil inlet and a shaft oil outlet; a shaft comprising an input element at its proximal end and a rotating equipment element at its distal end, wherein the shaft extends through at least a portion of the hollow housing, wherein at least a portion of the interior of the shaft comprises a shaft cooling channel, wherein the shaft comprises an inlet port at least substantially longitudinally aligned with the shaft oil inlet and in communication with the shaft oil inlet and the shaft cooling channel, wherein the shaft comprises an outlet port at least substantially longitudinally aligned with the shaft oil outlet and in communication with the shaft oil outlet and the shaft cooling channel; an oil, wherein the oil is circulated through the shaft oil inlet, the inlet port, the shaft cooling channel, the outlet port, and the shaft oil outlet.
  • FIG, 1 illustrates an example arrangement of a gas seal.
  • FIG. 2 illustrates an example arrangement of a gas seal.
  • FIG. 3 illustrates an example arrangement of a gas seal.
  • FIG. 4 illustrates an example arrangement of a thermal break insert assembly.
  • FIG. 5 illustrates an example arrangement of a thermal break insert assembly.
  • FIG. 6 illustrates an example arrangement of a gas seal.
  • FIG. 7 illustrates an example arrangement of a gas seal.
  • FIG. 8 illustrates an example arrangement of a shaft cooling system.
  • FIG. 9 illustrates an example arrangement of a gas seal.
  • FIG. 10 illustrates an example arrangement of a shaft cooling system.
  • FIG. 1 illustrates an example arrangement of a drive assembly 180.
  • Drive assembly 100 may comprise a housing 101 at least partially surrounding a shaft 102.
  • Shaft 102 may be operativeiy connected at its distal end to a rotating equipment element 104.
  • Shaft 102 may be operativeiy connected at its proximal end to an input element, such as a pulley 106.
  • Pulley 106 may be driven by any power input device, including a belt 108.
  • Shaft 102 may be operativeiy connected to any of a variety of input elements and/or power input devices configured to cause rotational movement, including a cog, a gear box, or the like.
  • Shaft 102 may extend into a hot temperature zone 110 at the distal end of shaft 182.
  • rotating equipment element 104 may be oriented at least partially in hot temperature zone 118.
  • Shaft 102 may extend into an ambient temperature zone 112 at the proximal end of shaft 102.
  • An input element such as pulley 106 and a power input device such as belt 108 may be oriented at feast partially in ambient temperature zone 112.
  • hot temperature zone 110 comprises temperatures in the range of about 200 °C to about 1 ,000 °C. In another embodiment, hot temperature zone 110 comprises temperatures in the range of about 300 °C to about 900 °C. In another embodiment, hot temperature zone 118 comprises temperatures in the range of about 400 °C to about 800 °C.
  • ambient temperature zone 112 may comprise any temperatures naturally encountered within earth's atmosphere. In another embodiment, ambient temperature zone 112 comprises temperatures in the range of about -45 °C to about 95 °C. In another embodiment, ambient temperature zone 112 comprises temperatures in the range of about -30 °C to about 80 °C. in another embodiment, ambient temperature zone 112 comprises temperatures in the range of about -10 °C to about 60 °C.
  • assembly 100 comprises at least one bearing 114 encircling shaft 102 near the proximal end of shaft 102. At least one bearing 114 may act to support shaft 102 within housing 181 and allow rotation of shaft 102 with decreased rotational friction.
  • Bearing 114 may be any of a variety of bearings, including a spindle bearing, a roller bearing, a tapered roller bearing, a spherical roller bearing, and a plain bearing.
  • bearing 114 comprises an inner race operatively connected to shaft 102 and an outer race operatively connected to housing 101 surrounding shaft 102,
  • shaft 102 is supported by two bearings oriented longitudinally near pulley 106.
  • assembly 100 comprises a seal lubricating and/or cooling oil 116 surrounding at least a portion of shaft 102 and bound by at least one gas seal 118.
  • oil 116 can be any of a variety of oils as commonly used in industry to at least one of lubricate and cool moving and/or heated parts.
  • an oil 116 is bound within a volume defined at its upper and lower edges by a first and second gas seal 118, at its radially outer edge by housing 101, and at its radially inner edge by shaft 102.
  • Seal lubricating oil and/or cooling oil 116 may comprise any of a variety of liquids, oils, or other fluids capable of reducing friction and/or transferring heat.
  • seal lubricating and/or cooling oil 116 may be circulated through a cooler (not shown) to minimize the amount of heat retained within seal lubricating and/or cooling oil 116.
  • At least one gas seal 118 may comprise any seal configured to substantially prevent a gas, liquid, or other fluid from traveling longitudinally along a shaft contained within a housing, such as shaft 102 and housing 104.
  • Gas seal 118 may comprise any of a variety of materials, including poiytetrafluoroethylene, nitrile rabber, or other material having similar properties.
  • seal lubricating oil and/or cooling oil 116 and at least one gas seal 118 are configured to at least substantially reduce the transfer of heat from hot temperature zone 110 to ambient temperature zone 112.
  • assembly 1(50 comprises a bearing, such as ceramic bearing 120, encircling shaft 102 near its distal end in hot temperature zone 111).
  • Ceramic bearing 120 may support shaft 102 within housing 101 and allow rotation of shaft 102 with decreased rotational frication.
  • Ceramic bearing may comprise an inner race operatively connected to shaft 102 and an outer race operatively connected to housing 101 surrounding shaft 102.
  • ceramic bearing 120 is oriented longitudinally near rotating equipment element 104.
  • ceramic bearing 12(5 is not sealed such that gases, liquids, or other fluids may pass along shaft 102 through or by ceramic bearing 12(5.
  • assembly 10(5 comprises a dust seal 122 at least partially encircling shaft 102.
  • Dust seal 122 may be oriented in hot temperature zone 110 near rotating equipment element 104, In another embodiment, dust seal 122 is oriented on shaft 182 between rotating equipment element 104 and ceramic bearing 128. Dust seal 122 may- comprise any of a variety of seals configured to prevent particulate matter from passing along shaft 102 and encountering ceramic bearmg 120.
  • shaft 102 passes through an aperture in an insulated enclosure 124.
  • Insulated enclosure 124 may be a container configured to at least substantially contain hot temperature zone 110.
  • insulated enclosure 124 is a reactor.
  • insulated enclosure 124 is a reactor within which biomass pyrolysis or gasification is conducted.
  • insulated enclosure 124 comprises insulation 126 oriented about at least a portion of its interior and configured to at feast substantially contain heat in hot temperature zone 110.
  • FIG, 2 illustrates an example arrangement of a drive assembly 200.
  • Drive assembly 200 may comprise a housing 281 at least partially surrounding a shaft 202, Shaft 202 may be operativeiy connected to a rotating equipment element 204 and a pulley 206, which pulley 206 may be driven by a belt 208.
  • Shaft 202 may extend between a hot temperature zone 210 and an ambient temperature zone 212.
  • Shaft 202 may be supported at its proximal end by at least one bearing 214.
  • Shaft 202 may be in contact with a seal lubricating and/or cooling oil 21 bound within a volume defined by at least one gas seal 218.
  • Shaft 202 may be supported at its distal end by at least one ceramic bearing 220, which may be adjacent to a dust seal 222. Shaft 202 may pass through an aperture into an insulated enclosure 224 including insulation 226 configured to at least substantially reduce the passage of heat from hot temperature zone 210 to ambient temperature zone 212.
  • shaft 202 is at least partially hollow. In another embodiment, shaft 202 is hollow about the majority of its length. In another embodiment, shaft 202 is hollow from its proximal end to at least the longitudinal point of shaft 282 at which ceramic bearing 220 is oriented. In one embodiment, shaft 202 is cooled using a cooling gas 228 injected at its proximal end. Cooling gas 228 may be an external air or other gas source at a temperature at least substantially lower than that in hot temperature zone 218.
  • FIG, 3 illustrates an example arrangement of a drive assembly 300.
  • Drive assembly 300 may comprise a housing 381 at least partially surrounding a shaft, 302.
  • Shaft 382 may be operativeiy connected to a rotating equipment element 304 and a pulley 386, which pulley 306 may be driven by a belt 308.
  • Shaft 302 may extend between a hot temperature zone 310 and an ambient temperature zone 312.
  • Shaft 302 may be supported at its proximal end by at least one bearing 314.
  • Shaft 382 may be in contact with a seal lubricating and/or cooling oil 316 bound within a volume defined by at least one gas seal 318.
  • Shaft 302 may be supported at its distal end by at least one bearing 320, which may be adjacent to a dust seal 322. At least one bearing 328 may be any of a variety of bearings as outlined above. Shaft 302 may pass through an aperture into an insulated enclosure 324 including insulation 326 configured to at least substantially reduce the passage of heat from hot temperature zone 318 to ambient temperature zone 312.
  • assembly 308 comprises a coolant 330 configured to be circulated within at least a portion of housing 301 and in thermodynamic contact with at least a portion of shaft 302.
  • coolant 330 is configured to at least substantially reduce the transfer of heat from hot temperature zone 310 to ambient temperature zone 312.
  • Coolant 330 may be utilized in a circuit wherein coolant 330 is passed into housing 301 via an inlet, circulated within housing 301, and directed out of housing 301 via an outlet.
  • Coolani 338 may be passed Profough a cooler (not shown) after which it is circulated back into housing 381.
  • coolani 338 comprises a low melting temperature salt, such as a nitrate salt.
  • coolant 338 comprises at least one of compressed air, steam, or another suitable gas.
  • coolant 330 comprises of a liquid product such as an oil.
  • FIG, 4 illustrates an example arrangement of a thermal break insert assembly 400 comprising a shaft 402 comprising a first shaft material 483 and a second shaft material 484.
  • Shaft 402 may extend from a low temperature region 406 to a high temperature region 408.
  • Lo temperature region 406 may be similar to ambient temperature region 112 described in FIG. 1, while high temperature region 408 may be similar to hot temperature zone 110 described in FIG. 1.
  • Assembly 400 may comprise a thermal break insert 410 at least
  • At least one bearing 412 may be disposed about at least a portion of thermal break insert 410,
  • Assembly 400 may be oriented substantially within a zone comprising elevated temperatures in the range of hot temperature zone 110 described in FIG. 1.
  • bearing 412 is configured to operate only to a temperature of about 200 °C.
  • first shaft material 403 comprises a material having a relatively high thermal conductivity (relative to second shaft material 404).
  • first shaft material 483 is any of a variety of materials, including carbon steel or stainless steel.
  • second shaft material 404 comprises a material having a relatively low thermal conductivity (relative to first shaft, material 403).
  • second shaft material 404 is any of a variety of materials, including Inconel®.
  • first shaft material 403 extends into low temperature region 406 to an input element, such as a pulley (not shown).
  • second shaft material 484 extends into high temperature region 408 to a rotating equipment element (not shown).
  • thermal break insert 410 is oriented over shaft 402 and first shaft material 403.
  • thermal break insert 410 comprises a serrated ring.
  • thermal break insert 410 comprises a splined ring.
  • thermal break insert 410 comprises a grooved ring.
  • the serrations, splines, or grooves may extend about thermal break insert 410 in a direction substantially parallel to the longitudinal axis of shaft 402. In another embodiment, the serrations, splines, or grooves may extend circumferentialiy about thermal break insert 410.
  • thermal break insert 410 comprises an interior surface contacting at least a portion of shaft 402, and an exterior surface contacting at least a portion of an inner race of bearing 412.
  • thermal break insert 410 comprises serrations, splines, or grooves oriented about one or both of its interior surface and exterior surface.
  • thermal break insert 410 comprises at least one shoulder configured to prevent thermal break insert 410 from translating axially relative to one or both of shaft, 402 and bearing 412.
  • thermal break insert 410 is comprised of an insulating material configured to tolerate the iemperature, stresses, or both found in high temperature region 488.
  • thermal break insert 410 is comprised of a ceramic material or Inconel ⁇ material.
  • thermal break insert 410 is comprised of a material configured to operate at a temperature of at least 100 °C.
  • thermal break insert 410 is comprised of a material configured to operate in a range between about 400 °C and about 800 °C.
  • the low thermal conductivity of second shaft material 404 relative to first shaft material 403 will create a higher temperature gradient in second shaft material 404. Such gradient may reduce the temperature of shaft 402 in the region of shaft 482 where bearing 412 is located.
  • the serrations, splines, or grooves of thermal break inert 410 are configured to reduce energy (e.g., heat) transfer from shaft 402 to the inner race of bearing 412. As a result, the inner race of bearing 412 may be maintained at a temperature that is lower than the temperature of shaft 402 in high temperature region 408.
  • FIG. 5 illustrates another example arrangement of thermal break insert assembly 400.
  • Assembly 400 may comprise shaft 402, first shaft material 403, second shaft material 404, low temperature region 406, high temperature region 408, thermal break insert 410, and bearing 412.
  • FIG. 6 illustrates an example arrangement of a drive assembly 600.
  • Drive assembly 600 may comprise a housing 681 at least partially surrounding a shaft 602, Shaft 602 may be operatively connected to a rotating equipment element 604 and an input element, such as a pulley 606, which pulley 606 may be driven by a belt 608.
  • Shaft 602 may extend between a hot temperature zone (not shown) and an ambient temperature zone (not shown).
  • Shaft 602 may be supported at its proximal end by at least one bearing 614.
  • Housing 601 may comprise a seal lubricating and cooling oil inlet 616 extending from the interior of housing 681 to the exterior of housing 601. Housing 601 may additionally comprise a seal lubricating and cooling oil outlet 617 extending from the interior of housing 601 to the exterior of housing 601. At least one gas seal 618 may be oriented within housing 601 adjacent to at least one of shaft oil inlet 616 and shaft oil outlet 617. In one embodiment, a first gas seal 618 is oriented within housing 601 proximal to at least one of shaft oil inlet 616 and shaft oil outlet 617, while a second gas seal 618 is oriented within housing 601 distal to at least one of shaft oil inlet 616 and shaft oil outlet 617. In one embodiment, shaft oil inlet 616 and shaft oil outlet 617 are both oriented between a first and second gas seal 618. In one embodiment, a third gas seal 618 is oriented longitudinally between shaft oil inlet 616 and shaft oil outlet 617.
  • shaft 602 comprises a shaft cooling channel 628, which may comprise a substantially hollow internal channel within shaft 602.
  • Shaft cooling channel 620 may be in fluid communication with an inlet port 622 and an outlet port 624,
  • inlet port 622 is at least substantially longitudinally aligned with shaft oil inlet 616 and in communication (e.g., fluid communication) with shaft oil inlet 616 and shaft cooling channel 620.
  • outlet port 624 is at least substantially longitudinally aligned with shaft oil outlet 617 and in communication (e.g., fluid communication) with shaft oil outlet 617 and shaft cooling channel 620.
  • shaft coolmg channel 620 is a substantially hollow internal channel extending from inlet port 622, distaily along at least a portion of shaft 602, across the width of at least a portion of shaft 602, and proximally along at least a portion of shaft 602 to outlet port 624.
  • inlet port 622 and outlet port 624 are both oriented longitudinally between a first and second gas seal 618.
  • a third gas seal 618 is oriented longitudinally betwee inlet port 622 and outlet port 624.
  • three gas seals 618 create two coolant chambers around shaft 682, wherein the two coolant chambers are connected via shaft cooling channel 620.
  • an oil is circulated through shaft oil inlet 616, inlet port 622, shaft coolmg channel 628, outlet port 624, and shaft oil outlet 617.
  • the oil is cooled using a cooler (not shown) and recirculated into assembly 600.
  • the oil may be circulated under pressure via a pump apparatus (not shown).
  • FIG, 7 illustrates an example arrangement of a drive assembly 700.
  • Drive assembly 700 may comprise a housing 781 at least partially surrounding a shaft 702, Shaft 702 may be operativefy connected to a rotating equipment element 704 and a pulley 706, which pulley 706 may be driven by a belt 708.
  • Shaft 702 may extend between a hot temperature zone (not shown) and an ambient temperature zone (not shown).
  • Shaft 702 may be supported at its proximal end by at least one bearing 714.
  • Housing 701 may comprise a shaft oil inlet 716 and a shaft oil outlet 717, wherein at least a first and second gas seal 718 may be oriented proximally and distaily, respectively, of shaft oil inlet 716 and shaft oil outlet 717, In one embodiment, a third gas seal 718 may be oriented longitudinally between shaft oil inlet 716 and shaft oil outlet 717.
  • Shaft 702 may comprise a shaft cooling channel 720 extending longitudinally along at least a portion of shaft 702.
  • Shaft 702 may comprise an inlet port 722 and an outlet port 724 providmg for the circulation of an oil from shaft oil inlet 716, into inlet port 722, along shaft cooling channel 720, to outlet port 724, and out shaft oil outlet 717,
  • shaft 782 comprises a coolant pumping tab 726 oriented adjacent to inlet port 722, In one embodiment, rotation of shaft 782 within housing 701 causes coolant pumping tab 726 to force oil into inlet port 722.
  • FIG, 8 illustrates a cross-sectional view of the shaft cooling system in assembly 700 illustrated in FIG, 7, including shaft 702, shaft cooling channel 728, inlet port 722, outlet port 724, and coolant pumping tab 726, Clockwise rotation of shaft 782 may cause coolant pumping tab 726 to force oil to circulate through shaft cooling channel 728.
  • FIG. 9 illustrates an example arrangement of a drive assembly 980.
  • Drive assembly 988 may comprise a housing 981 at least partially surrounding a shaft 982, Shaft 982 may be operatively connected to a rotating equipment element 904 and a pulley 986, which pulley 906 may be driven by a belt 908, Shaft 902 may extend between a hot temperature zone (not shown) and an ambient temperature zone (not shown). Shaft 982 may be supported at its proximal end by at least one bearing 914,
  • Housing 901 may comprise a shaft oil inlet 916 and a shaft oil outlet 917, wherein at least a first and second gas seal 918 may be oriented proximaily and distaliv, respectively, of shaft oil inlet 916 and shaft oil outlet 917.
  • a third gas seal 918 may be oriented longitudinally between shaft oil inlet 916 and shaft oil outlet 917.
  • Shaft 902 may comprise a shaft cooling channel 920 extending longitudinally along at least a portion of shaft 902.
  • Shaft 902 may comprise an inlet port 922 and an outlet port 924 providmg for the circulation of an oil from shaft oil inlet 916, into inlet port 922, along shaft cooling channel 920, to outlet port 924, and out shaft oil outlet 917.
  • inlet port 922 comprises an inlet port axis
  • outlet port 924 comprises an outlet port axis
  • shaft 902 comprises a central longitudinal axis extending along the length of shaft 982 about its cross-sectional center point.
  • the inlet port axis and the outlet port axis are angled (that is, the inlet port axis and outlet port axis are not oriented normally to shaft 902) and do not intersect the central longitudinal axis of shaft 902. In another embodiment, at least one of the inlet port axis and the outlet port axis may be angled and do not intersect the central longitudinal axis of shaft 902.
  • the angled orientation of the inlet port axis and the outlet port axis results in oil to be forced into inlet port 922 as shaft 902 rotates.
  • FIG, 18 illustrates a cross-sectional view of the shaft cooimg system in assembly 980 illustrated in FIG. 9, including shaft 902, shaft cooling channel 920, angled inlet port 922, and angled outlet port 924. Clockwise rotation of shaft 902 may cause oil to be forced into angled inlet port 922 and circulated tlirough shaft cooling channel 920.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Sealing Devices (AREA)
  • Mechanical Sealing (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

Divers modes de réalisation de l'invention concernent des systèmes et des appareils de joint étanche aux gaz à utiliser dans un ensemble transmission afin de transférer une force de rotation d'une zone à température ambiante à une zone à température chaude.
PCT/US2014/019700 2013-02-28 2014-02-28 Joints étanches aux gaz pour applications d'arbre rotatif à température élevée WO2014134582A2 (fr)

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US201361770416P 2013-02-28 2013-02-28
US61/770,416 2013-02-28

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WO2014134582A3 WO2014134582A3 (fr) 2014-10-23

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