Patent CA-3091120-A1 (CA)
Title: Method for heat transfer across rotary joint
Inventor: MILLER KIRK A
IPC: H02K5/173
Filed: 2019-01-25
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY  (PCT) (19) World Intellectual Property         0      1 11111 1 111111 11 111111 1 Organization     -----International Bureau                                (10) International Publication Number (43) International Publication Date      ...0"")      WO 2019/240843 Al 19 December 2019 (19.12.2019) WIPO I PCT (51) International Patent Classification:       AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, H02K 9/22 (2006.01)         HO2K 7/08 (2006.01)    CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, HO2K 1/27 (2006.01)         H02K 21/02 (2006.01)    DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, H02K 5/173 (2006.01)     H02K 21/24 (2006.01)    HR, HU, ED, EL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (21) International Application Number: MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, (22) International Filing Date:    SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, 25 Januaiy 2019 (25.01.2019)    TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (25) Filing Language:                                                               English (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, (26) Publication Language:                English GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, (30) Priority Data:             UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 16/009,0'73        14 June 2018 (14.06.2018)    US    TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, EE, IS, IT, LT, LU, LV, (71) Applicant: RAYTHEON COMPANY [US/US]; 8'70    MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, Winter Street, Waltham, Massachusetts 02451-1449 (US).    TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, (72) Inventors: MILLER, Kirk A.; 44'76 Royal Ln., Dallas,    KM, ML, MR, NE, SN, TD, TG). Texas '75229 (US). GRAUE, Brian M.; 3609 Sequoia Ln., Melissa, Texas '75454 (US). BOGERT, William T.; 6'724 Published: ¨    Bellehaven Dr., Plano, Texas '75023 (US).    ¨ with international search report (Art. 21(3)) = (74) Agent: DOYLE, David M. et al.; Munck Wilson Mandala, .    LLP, 600 Banner Place Tower, 12'7'70 Coit Road, Dallas, Texas '75251 (US). = - (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, = (54) Title: METHOD FOR HEAT TRANSFER ACROSS ROTARY JOINT (57) Abstract: A torque motor (100) includes a large area rotor (101), a stator (102) sur-. rounding at least a portion of the rotor (101), and a small air gap (103) separating the rotor *WM iii m                100    (101) from the stator (102) to allow frictionless thermal coupling between the rotor (101) N II .                             r"    and the stator (102). Heat from the rotor (101) is transferred to the stator (102) by conduc-FAPAIAW il r aamil 4.         tion. The stator (102) contacts an inner surface for a housing (105) of the torque motor . ¨ (100) for conductively coupling to a cold environment air flow exterior to the torque motor 101- I 441. , --A14  11,4 !!    housing (105). The air gap (103) may have a dimension of about 0.002 to 0.003 inches. The 1               i't-1.    1 stator (102) may be conductively coupled to the torque motor housing (103) by one of a =    102 , ,,,,,A =           - ,    ,      thermal gap pad or high conductivity thermal gap filling compound. Heat conduction from 103          A r',.>    -1 r ,    1 .     the rotor (101) to the stator (102) preferably occurs without rotation of the rotor (101). 105                  d I I               =- !LI    '    :. '    ' %     .    =1 16 , ''.".  _ _ r ' f tkrI i r 1 t 1 re)             1)r 1 11411.-. '     ' Ire    102 .    i. : =    ,    1 C     /7 ii- ...     :.    r ie e Ire                 1103 ..t1:410 4 / i r -......     GT                  '4074 kAlo 0          FIG. 1 el c