1、ML“86WB 26 JULY 1965 Superseding 19 July 1957 MILM-8609A (Am) KILITARY SPECIFICATION NOTORS, DIRECT-CURRENT, 28-VOLT SYSTEM, AIRCRAFT, GENEBAL SPECTFICATION .FOR This specification is mandatory for useby all Departments and Agencies of the Department of Defense. 1, SCOPE 1.1 Scope.- This specificati
2、on covers the general requirements for two classes of aircraft electric motors and, together with a detail Specification or standard con- taining equivalent information as described in 3.kr2, forms the complete apecifieation for procurement of aircraft electric motors operable from 28V dc eystems, 1
3、.2 Classification,- Motors shall be of the following clames, as specified (see 6,2): Class A - Motors that are operable under temperature-altitude conditions of curve II of MS33543. Class B - Motors that are operable under temperature-altitude conditions of curve I of YS33543. 2, APPLICABLE DOCWNTS
4、2.1 The following documents, of the issue in effect on date of invitation for bids or reauest for proposal, form a part of this specification to the extent speci- fied hereirk “ SPEGIFICATIONS Federal QQ-P-416 Ydlitarx MILP-116 WIL-M-3i71 Plating, Cadmium (Electrodeposited) Preservation, Methods of
5、Magnesium Alloy, Frocesses for Corrosion Protection of Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL“8609B “3-5272 MIL-C-5541 MIL-T.-6lll MIL-L6880 MIL-S-7742 MIL-A-8625 116298 MILD-70327 STANDARDS Military MIL-STD-130 MIL-STD-3.43 MIL-STD-195
6、MIL-STD-202 MIGSTD-704 B33543 MS33568 MS33569 MS33570 B33571 W33586 Environmenta Film Materials for Interference Control Requirements, Aircraft Equiwnt Lubrication of Aircraft, General Specification for Screw Threads, Standard, Optinnam Selective Series: Anodic Coatings, for Aluminum and Aluminh All
7、oys Eleckric Machines.Having Rotating Parts and Associated Drawings, Engineering and Associated Lists Equipmen%, .Gweral $peci.ticai%on for Ahninun and Aluminum Alloys General Specification for Repair Parts: Packaging of Identification Marking of ,US Ydlitary Property Specifications and Standards, O
8、rder of Precedence Marking of Connections for Electric Assemblies Test Methods for Electronic and Electrical Electric Power, Aircraft, Characteristics and Criteria-Temperature and Altitude Range Self Drive, Square Mounting Flange With Involute Drive, Round Mounting Flange With Involute Drive, Square
9、 Mounting Flange lith Round Shaft Drive, Round Mounting Flange With Round Shaft Metals, Definition of Dissimilar for the Selection of Component Parts Utilization of Cooled Electric Equipment Spline-Pinion Spline-Pinion and Key and Key (Copies of specifications, standards, drawings, and publications
10、required by suppliers-in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer. ) 2.2 Other publications. - The following document forms a part of this specifica- tion to the extent specified herein. Unless otherwise i
11、ndicated, the issue in effect on date of invitation for bids or request for proposal shall apply: Uniform Classification Committee Uniform Freight Classification Rules (Application for copies should be addressed to the Uniform Classification Cormnittee, 202 Chicago Union Station, Chicago, Ill, 60606
12、.) 3. REQUIREMENTS 3.1 General.- The requirements specified in the detail specification or atand- ard are applicable as detail requirements of this specification. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.9 Materials.- Materials used in the
13、 manufacture of motors shall be of high quaUty, suitable for the purpose intended, and shall conform to applicable Government specifications wherever practicable. The requirements of this paragraph will be con- sidered as having been met if the preproduction tests have been passed. 3.3.1 Selection s
14、f materials.- Specifications and standards for all materials, parts, and Government certification and approval of processes and equipment, which are not specifically designated herein and which are necessary for the execution of this specification, shall be selected in accordance with MIESTD”l43, ex
15、cept es provided in the following paragraph. 3.3.1.1 Standard parts.- Military Standard (M) parts shall be used wherever they are suitable for the purpose, and shall be identified on- the drawing by their part numbers. Commercial utility parts such as screws, bolts, nuts, and cotter pins may be used
16、, provided they possess suitable properties and are replaceable by the M3 parts without alteration, and provided the corresponding standard part numbers are referenced in the parts list and, if practicable, on the contractors draws. In the event there is no suitable corresponding standard part in ef
17、fect on date of invitation for bids, commercial parts may be used provided they conform to all require- ments of this specification. 3.3.2 Corrosion resistance.- Materials shall e corrosion resistank or suitably processed to resist corrosion. 3.3.3 Dissimilar metals.- Unless suitably protected, metl
18、s such as brass, copper, or steel shall not be used in intimalie contact with magnesium, aluminup, or their alloys. When protection is used it shall be such type that a low impedance path is affered to radio-frequency currents, Dissimilar metals are defined in MS33586, 3.4 Design and construction,-
19、3.4.1 Duty cycle. - The duty cycle shall be specified in the detail specifica- tion. 3.4.2 Detail requirements.- The detail requirements shall be specified in the detail specification or standard and shall include all the applicable data shown in 6.5. 3.4.3 Simplification.- Simplicity of design, res
20、ulting from use of the same part for as mn, applications as possible in a given motor and in motors of different ratings,. 3s hgghly d6sfrble. 3.4.4 Mounting flange.- The mounting flange, when required, and clearance for mounting studs shall be in accordance with the applicable motor standard or det
21、ail specification. Flanges in accordance with MS33568, 33569, MS33570, or W33571 are preferred in the applicable motor sizes. 3 ” I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-sh or MW571 are-preferred in the applicable motor sises. 3. k.6 Lubric
22、ation.- Normally, lubrioation shall not be allowed during the servicre life of the motori When lubrication ia allowed during the service life by the standard or detail specification, it shall be .in accordance with MILL-6880, 3.4.7 Electrical connections.- External termination of the notor wiring sh
23、all be in aceordance with MIL-STD-195, desa otherwise ahown on the applicable standard or detail specification. The motor mounting provisions shall provide a low-impedance path for radio Anterference currents, but shall not be used to complete motor electri- cal. circuits in lieu of a lead, Wherever
24、 practicable, positive connections which do not depend upon insulation in compression shall be used. Suitable shielding shall be provided for remote filtering if specified in the detail specification. . 3.4.8 Armature.- Motors shall be so constructed that the armate is readily removed without the us
25、e of special tools. 3.b.9 Brushes.- 3.4.9.1 Brush life.- The usefullife of brushes at specified altitudes shall be as follows: Class A motor: 1,OOO hours Sea level to 35,000 feet 500 hours 35,000 to 50,000 feet Class B motors: (a) Intermittent duty motor: 1,ooO hours Sea level to 35,000 feet 500 hou
26、rs 35,000 to 65,000 feet 500 hours Sea level to 65,000 feet (b) Continuous duty motor: 3.4.9.2 Brush accessibility.- Brmshes shall be accessible for replacement when brush access covers . are removed. It shall be possible to change the brushes with- out the aid of special tools. 3 ,ard. The protecti
27、ve system must not be automatically reset and both motor and protector system are considered expended after one operation. 3.4.13.1.3 Hethod III.- Protection shall be provided to permit average rated torque capability under all operable environmental power and load conditions and attain a substantia
28、l portion of the rated life of the motor under overload conditions which cause cycling of the thermal protedtive device, The motor and protector shall provide a minimum of 25 hours of intermittent or continuous locked rotor protection at rated voltage.-. 3.b.13.2 Thermal protection tm.- 3.4.13.2.1 D
29、irect acting.- A protector within or on the motor enclosure shall interrupt the motor power supply and shall be of sufficient rating to interrupt the maximum locked-rotor current and perform in aocordanoe with the appropriate thermal protection method specified herein (see 3.Jhen exposed to fungus p
30、oywbh as encountelwl (f) Operating position: When installed in any position. (g) Input power: The input power shall be in accordance wi$h MIL-STD-7. 3.5 Interchangeability.- All parts having the same manufacturers part number shall be directly and completely interchangeable with respect to installat
31、ion and performance. Changes in manufacturers part numbers shall be governed by the drawing number requirements of MILD-.70327. 3.6 Finish.- 36. I Anodizing,- When used, . When used as a sole protective ooating, cadmium plating shall be Sn aocordance with QQ-P-06, type I OP II, a8 applicable, and of
32、 a olass that is ade- quate to achieve the degree of proteotion required. 3.7 Screw threads.- Screw threads shall conform to MIL-S-7742, 3#8 Safety wiring and staking.- Accidental loosening of 8orews, BCW parts, and other connections shall be prevented by aafety wiring (0.032-inoh min. OD where prao
33、ticable), staking, OP other approved methods. Washers and aotter pins, where used, shall be assenibled in a manner which prevents rotation of washers and movement of cotter pins under conditions of vibration, 3#.9 Perfomrice.- The motor shall aatfefy any natural combination of the tests specified in
34、 section 4, 3.10 Markin%. - 3,lQ.l Terahalse- Marking8 of terminals shall be in accordance with MIL-STD-195 unless otherwise shown by the applloable motor standard or detail specification. Idhen deviations from MIL-STPl95 exist, a diagram or ohart of the terminals shall be affixed to the motor. 3.10
35、.2 Rotation marking.- The direction of rotation of the output shaft shall be plainly and permanently indicated by an arrow for both unidirectional and revers- ible motors. 3.lQ.3 Internal capacitors.- The presence of internal capacitors which may be damaged by dielectric strength test of the motor s
36、hall be plainly and permanently indioated on the surface of the motor near the nameplate. 3.11 Identification of product.- Equipment, assemblies, and parts shall be marked in accordance with MIL-STD-130. The identification data applied to the motor shall. be as follows: Nomnclatm (as shown on applic
37、able standard) HP 9 m.M , Volts 9 Amp* For use on 2SV dc system DUtY (continuous or intermittent, and if intermittent , state duty cycle as II minutes at full load, followed by minutes at load, followed by qhutgs. rest,“) .- 7 Provided by IHSNot for ResaleNo reproduction or networking permitted with
38、out license from IHS-,-,-MS Part No. Federal Stock No. ManufacturerIs part No. Manufacturer 1s serial No , Contract or order No, Manufacturer 18 name or trademark Inepectorls stamp us Any additional nameplates with proprietary data shall be attached to the plotor by means of easily removable scrmI 3
39、.12 work mans hi.- All machined surfaces shall have a finish suitable for the purpose.ntended, and all details of manufactiwe, including the preparation of parte and accessories, shall be in accordance with the best practice for high-quality elec- trical equipment. Particular attention ahall be give
40、n to neatness and thoroughness of soldering, wiping, impregnation of coils, marking of parts, plating, lacquering, riveting, clearance between soldered connections, removal of burrs and sharp edges, and ruggedness. 4. QUALITY ASSURANCE PROVISIONS 4.2 Classification of inspections.- The examination a
41、nd testing of motors shall be. classified as: (a) Preproduction inspec tion (4.3 1 (b) Quality conformance inspection (4.4) 4.3 Preproduction inspection.- 4.3.1 SamrAina instructions,- The preproduction samples shall consist of four motors representative of production motors, .Each mlrbd accompded.b
42、y a set of spare brushes. 4.3.2 Tests.- The preproduction tests shall consist of all the tests specified under 4.6, with the exception of the load test specified in 4.6,3. On each of the Pour motors, tests shall be conducted essentially in the order listed for each motor. 8 Provided by IHSNot for Re
43、saleNo reproduction or networking permitted without license from IHS-,-,-MIL”-8609B (b) Dielectric strength (c ) Perf ormane e (d) Overspeed (e) High ambient temperature (f) LOW ambient temperature (g) StafijW? (h) Commutator and brush wear (i) Fungus Motor No, 2 -nation of product Dielectric streng
44、th Performance Overspeed Ripple voltage (when specified) Radio interference Acceleration Operating position Comtator and brush wear Humidity Explosion-proof (when specified) Thermal protection Methods 2 and.3 (when specified) Motor No. 3 Examination of product Dielectric strength Perf ormance Oversp
45、eed Inw ambient temperature Shock Brake performance (motors with Vibration Salt spray Thermal protection Methods 1 and 2 stopping devices only) (when specified) Motor No 4 Examination of product Melectric strength Performance Overspeed Fluid resistanke (when specified) Life_ and for inter- mittent-d
46、uty motors, when the difference between the maximum rise at the end of sue- cesive duty cycles is no more than Po C, I The ability of the motsr to deliver rated torque at rated input voltage for con- tinuous- or rated duty cycle operation shall be demonstrated, Immediately following the above run, t
47、he ability of the motor to deliver:. the rated torque for both mfifrmun and maximum continuous input voltage shall be d-nstrated. When specified by the detatl specification or standard, motor operation at reduced horsepower output for emergency or ground stmt low-voltage limits of MILSTD-701, shall
48、be demonstrated. The final temperature attained by the motor shall not be cause for rejection, provided the motor meets all other“ requirements of the specification. When specified,.the temperature of exposed parts shall be limitedl to a maxhum of 199. C , and shall not be exceeded for any temperatu
49、re-altitude eonditfon within the requirements of this specification. be determined. T? 4.6,2,2 Speed,- At rated voltage and rated torque, the speed of the mtor shall le speed of continuous-duty motors shall be within 10 percent of rated speed with the internal temperature of the motor as near as practiczable to the .“ . ,. - . . - . . temperature recorded duping heat5 motors shall be within 10 percent .ng v of t est sate 4060201 I speed .lo The with th I
