1、MLITARY SPECIFICATION STARTER. ENGINE; ELECTRICAL MOTOR (SHIPBOARD USE) This specification is approved for use by the Naval Sea Systems Command and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers electrical motor engine
2、 starters for application in starting internal combustion engines aboard surface ships and for starting internal com- bustion motor boat engines. 1.2 Classification. Starters shall be of the following-types and-classes as specified (see 6.2.1). Type I - For applications requiring a torque limiting c
3、lutch. Type II - For applications not requiring a torque limiting clutch (direct drive). Class 1 - Positive drive solenoid. Class 2 - Inertia drive. 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents, of the issue in effect on date of invitationwids or request for proposal, for
4、m a part of this Specification to the extent specified herein. SPECIFICATIONS FEDERAL FF-E-171 -* Bearings, Ball, Annular (General Purpose). “-1-536 - Insulation Sheet, Electrical, Natural Muscovite Mica. “-1-538 - Insulation, Electrical, Pasted-Mica. QQ-C-390 - Copper Alloy Castings (Including Cast
5、 Bar). 0-1-666 - Iron, Malleable, Ferritic, for Castings. QQ-S-763 - Steel Bars, Wire, Shapes, and Forgings Corrosion-Resisting. QQ-T-390 - Tin Alloy Ingots and Castings and Lead Alloy Ingots and Castings (Antifriction Metal) for Bearing Applications. MILITARY MIL-M-14 - Molding Plastics and Molded
6、Plastic Parts, Thermosetting. ML-S-890 - Steel: Forgings and Bars for Hulls, Engines and Ordnance (Heat MIL-S-901 - Shock Tests H. I. (High Impact), Shipboard Machinery, Equipment MIL-E-917 - Electric Power Equipment, Basic Requirements for (Naval Shipboard MIL-E-2036 - Enclosures for Electric and E
7、lectronic Equipment Naval Shipboard. MIL-C-2212 - Controllers, Electric Motors, AC or DC, and Associated Switching MIL-P-15024 - Plates, Tags and Bands for Identification of Equipment. Treated). and Systems, Requirements for. Use) . Devices, Naval Shipboard. Beneficial comments (recommendations, add
8、itions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Ship Engineering Center, SEC 6124, Departnent of the Navy, Washington, D.C. 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form-1426)
9、 appearing at the end of this document or by letter. F6C 2920 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IIL-S-15371B (SH) MILITARY (continued) MIL-P-15024/5 - Plates, Identification. MIL-P-15037 - Plastic-Sheet, Laminated, Thermosetting DOD-B-i
10、5072 - Batteries, Storage, Lead-Acid, Portable DOD-B-15072/2 - Battery, Storage, Lead-Acid, Portable Resin. For (METRIC). (6V-SBND-205Ahl (METRIC) s Glass-Cloth, Melamine- General Specification Type BB-253/ WD-B-15072/6 - Battery, Storage , Lea-Acid, Portable Type -257/U MIL-E-16298 - Electric Machi
11、nes Having Rotating Parts and Associated Repair MIL-1-24092 - Insulating Varnish, Electrical, Impregnating Solvent Containing. MIL-1-24137 - Iron Castings, Modular Graphitic (Ductile Iron) and Nodular (6V-SBblD-13OAh) (1.lETRIC) . Parts : Packaging Of. Graphitic (Corrosion Resisting, Austenitic, Lou
12、r Magnetic Permeability) (For Shipboard Application). STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I Environ- MIL-STD-749 - Preparation and Submission of Data for Approval of Nonstanda
13、rd mental and Type II Internally Excited). Parts. (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) the extentXi$ied her
14、ein. invitation for bids or request for proposal shall apply. 2.2 Other ublications. The following documents form a part of this specification to Unless otherwise indicated, the issue in effect on date of AtERICAN SOCIETY FOR TESTING AND HATERIALS (ACTM) B438 - Copper-Base Sintered Bearings (Oil Imp
15、regnated). (Application for copies should be addressed to the American Society for Testing and (Technical society and technical association specifications and standards are generally Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) available for reference from libraries. They are also
16、 distributed among technical groups and using Federal agencies.) 3. REQUIREMENTS 3.1 First article. The first starter of each design, type, class, and size produced 3.2 Material. Minimum requirements for materials to be used shall be as specified in under a costororder shall be tested as specified i
17、n 4.3 (see 6.4). table I. All steel and iron shall be corrosion resistant in accordance with MIL-E-917. Reclaimed materials shall be used to the maximum extent possible. Item U Armature cores Ball bearings Ball bearing caps and cartridges Brush holders Brush studs TAE3LE I. Minimum material requir M
18、aterial Steel -_- Steel Malleable iron Nodular graphitic iron Steel Nodular graphitic iron Brass Steel e. Remarks Nonaging low hysteresis FF-B-171 QQ-1-666, Grade I MIL-1-24137 2 c 7 -.- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE I. Item C
19、ommutators: V-rings and shells End brackets Prame Insulation between commutator bars Insulation varnish Segments, commutator Shaf ts Sleeve bearing Springs Yoke MIL-S-15371B (SH) I himum material requirements. (continued) Material Steel CoZiar graphitic iron Mica Grade CA Copper Steel ronze Babbit,
20、antifriction f metal Steel Plastic material Remarks MIL-S-890, class B or c QQ-1-666, Grade I MIL-1-24137 MIL-1-241 3 7 “-1-536 and “-1-538 MIL-1-24092 Harc? drawn rolled or forged MIL-S-890, Alloy NO. 1 QQ-C-390 or ASTM B438 QQ-T-390 QQ-S-7G3 MIL-P-15037 Laminated, type GME , MIL-1.1-14 Molded 3.3
21、Ambient temperature. varying from Oo Celsius (C) to 5OoC. The rating of the equipment shall be based upon an ambient 3.4 Solderinq. 3.5 Design and construction. 3.5.1 Ratings. Starter motors shall be in accordance with figures 1 through G and Any necessary soldering shall be in accordance with MIL-E
22、-917. table II. may be used subject to acceptance by the procuring activity in accordance with procedures specified in MIL-STD-749. practical with figures 1 through 6 and table II. For applications where the use of standard motors is not practical, nonstandard Where nonstandard motors are used they
23、shall conform to the extent The rated voltage of the motors shall be in accordance with table II. 3.5.1.1 Voltage. E F See not TABLE II. Rating of Nominal battery voltage 12 12 24 30 24 24 30 30 30 36 30 36 30 36 at top of nc Navy battery class SBMn 130AH 205AH . 130AH 130AH 130A! 205AIi 130AH 2 O 5
24、AII 205AH 205AH 205AH 205AH 205AH 205AH : page. andardized starters OOC. cranking r/min at amperes 700 1,100 700 700 700 1,100 700 1,100 1,100 1,100 1 ,100 1,100 1 JO0 1,100 1250 800 1400 2000 1000 1300 1450 1900 2300 2700 1150 1350 1050 1250 Minimum torque at pinion 2k0 I 22 3 Provided by IHSNot fo
25、r ResaleNo reproduction or networking permitted without license from IHS-,-,-of a motor of the proper size. starting torque to turn over the engine and the approximate speed and torque at which the engine starts to fire under cold starting conditions. Such information shall include the approximate -
26、 I 3.5.1.2 B. The motor shall be of the varying speed type. The speed of the motor shall be in accordance with the values specified in table II. with a particular engine shall be capable of cranking the engine at a speed of at least 125 percent of the engine starting speed at the beginning of the du
27、ty cycle specified in 3.5.6 and at least 100 percent of engine starting speed at the end of the duty cycle. The motor selected for use 3.5.1.3 Torque. The torque of the rrotors shall be in accordance with the values spec- ified in table II. the torque necessary to crank the engine at starting speed
28、for the duty cycle specified in 3.5.6. The motor selected for a particular engine shall be capable of developing 3.5.1.4 Cuzrent. The rated current of the motor shall be the current drawn by the, I drawn by the motor during the duty cycle test at 5OOC. I and DOD-B-15072/6. The characteristics of the
29、se batteries while operated for 7 duty cycles as specified in 3.5.6 based on a temperature of OC specific gravity of 1,275, are shown in table III. voltage drop in the connecting cable. The motor design should allow for an additional 5 percent of battery terminai I TABLE III. Battery characteristics
30、 OC. - Percent of nominal (2v per cell) battery terminal voltage - Discharge rate (amperes) BB-257/U E-253/U Start Finish Start Finish 500 81.6 76.3 87 84.2 700 75.8 64.5 82.9 78.3 u900 - -. 79.2 72.5 /1.100 - - 75.4 62.9 %t applicable to DE-257U. _ not exceed the value; specified in tabl IV. Field
31、winding (thermocouple or thermometer method) 145OC. Armature wining (thermocouple method) 145OC. show no evidence of burning, charring, loosening, cracking, smoking, rupture or other damage. with the maximum battery voltage applied to the motor terminals. 3.5.5 Overspeed. The motor shall be capable
32、of operating for 5 seconds under no load 3.5.6 Duty cycle. The motor shall be capable of operating at minimum speed and torque, I (a) The engine shall have been at rest, with the oil drained out of the crankcase, for not less than 6 hours. 4 I Provided by IHSNot for ResaleNo reproduction or networki
33、ng permitted without license from IHS-,-,-MI L-S-15 37 1B (SH) (b) (c) Cold water of temperature not exceeding 35OF shall be circulated through the Imecliately before the test, the engine crankcase shall be filled with engine cooling system for 1 hour prior to the test. lubricating oil at 35OF. 3.5.
34、6.1 Insulation resistance. The insulation resistance of starting equipment at the end of the duty cycle test shall be not less than 1 megohm. with MIL-E-2036 as specified, (see 6.2.1). or other sten equivalent physical properties, shall be used for the shaft. pletion of the duty cycle test there sha
35、ll be no distortion of the shaft at the keyway or breakage of the key. so as to prevent either rotati the serial number of manufacturers designation (model, type or part number) sufficient to completely identify the part shall also be stamped on the tooth surface of the armature lamination. 3.5.12.1
36、.2 Alinement. Brush holders shall be so mounted and alined that the brushes 3.5.12.2 Terminal w. A separate terminal screw shall be provided for securing-the 3.5.12.3 Springs. Springs shall not be depended upon to carry current. Care shall be 3.5.12.4 Brushes. Brushes shall be of a type that will gi
37、ve the maximum electrical Brush pigtails shall be composed If the pig- 3.5.13 Prame and armature markin . The manufacturers serial, model, type, or part 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-15371B (SH) 3.5.14 Circuit design. 3.5.15
38、 Connections terminals. 3,5.15.1 Securing connections. Engine starters shall be designed for operation on a two-wire, ungrounded system. All connections likely to become loosened by vibration Connections and leads shall be secured in shall be provided with efficient locking devices. a reliable manne
39、r to prevent their coming in contact with moving parts or being chafed by contact with stationary par%. Excess solder shall be removed from soldered connections. leads are not required to be furnished as a part of the engine starter. Terminal lugs or cupwashers for pilot circuit leads, however, are
40、required to be furnished with each motor starter. faces of enclosures to provide ease in connections and maintenance of electrical connections to the equipment. be in accordance wizh E-E-917 except that for equipment rated not more than 36 volts, sur- face creepage of enclosed parts may be reduced t
41、o 1/4 inch. between terminal and frame. interface with the i the brushes shall be sufficiently seated on the commutator to obtain the required electrical performance and the commutator itself shall have a smooth, uniformly colored surface. Thereafter during the progress of the tests, the brushes and
42、 the commutator shall remain untouched. The observation of commutation will not, in general, require any special tests as such, but will usually be made in conjunction with and during the progress of the duty cycle test. load with madtary voltage applied to the motor terminals. shall be 5 seconds. t
43、he armature to ascertain that the mechanism functions satisfactorily. 4.8.4 Overs eed. Overspeed tests shall be made at maximum attainable speed under no The duration of the test The overspeed test may be made with the engaging mechanism assembled to 4.8.5 Dielectric w. 4.8.5.1 General. The dielectr
44、ic test shall be made after all other tests have been completed. due to dirt or moisture or damage to windings, this shall be remedied before the application of the dielectric test voltage. assembled machine and not upon individual parts; an exception is made in the case of repair parts which requir
45、e dielectric tests. 4.8.5.2 Test volta e. The frequency of the testing voltage shall be not less than 60 It shall eoximat: a true sine wave. 4.8.6 Insulation resistance. The measurement of insulation resistance shall be made Circuits of groups of Test shall be made If the insulation resistance of th
46、e windings is known to be lower than specified, The dielectric test shall be made upon the completely Hz. continuously for a period of 1 minute. with all circuits of equal voltage above ground connected together. circuits of different voltage above gournd shall be tested separately. using a potentia
47、l of 500 volts, direct-current. The temperature of the windings at the time of this measurement shall be recorded. Insulation resistance (hot) shall be taken immediately following temperature readings on duty cycle tests. Insulation resistance (cold) shall be obtained with the equipment at approxima
48、tely the same temperature as the surrounding air. The testing voltage of 750 volts shall be applied 4.8.7 Torque. 4.8.7.1 Crankin torque and speed, The starter shall be mounted on a test stand to simulate actual mountyng in use. direct load shall be applied for no longer than five seconds. Readings
49、shall be taken at a minimum of five points from the performance curve shown on the applicable drawing. necessary, additional readings may be taken to determine conformance to the applicable curve. Between readings, a minimum of five minutes cooling time to permit the frame temperature to return to room temperature shall be allowed. Alternate methods for accomplishing this test may be used providing they have been approved by the Government. brak
