1、- 5 AEril 1972 Superseding 1L-M-82433( OS) io my 1966 MILITARY SPECIFICATION MOTOR, DIRECT CURRENT (For Torpedo Mk 46 Mod 1) This specification has been approved by the Naval Ordnance Systems Gomand, Department of the Navy. 1. SCOPE 1.1 This specification covers requirements for the procurement of o
2、ne type of armature-controlled dc motor (see 6.1.2). 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposals form a part of this specification to the extent specified herein. SPECIFICATIONS Federal PPP-B-636 Box, Fiberboard M
3、ilitary MIL- P- 116 Preservation, Methods of MIL-E-5272 SrANDARDS Militarv Environmental Testing, Aeronautical and Associated Equipment, Gen Spec for MIL-sD- Marking for Shipment and Storage MIL - SrD - 143 Specifications and Standards, Order Of Precedence for the Selection of MIL- SrD-440 Soldering
4、 Techniques for Standard Type Solder Terminals Licensed by Information Handling ServicesMIL-M-82433A 13 11999990bmI MIL-M-824338( OS) KL- -889 MS-i6997 MS-21042-08 Federal Fed. Test Method -151 DRAWINGS Naval Ordnance Systems Command JYAVORD Dwg 2540053 Dissimilar Metals I Screw, Cap, Socket Head, H
5、ex- agon, Alloy Steel, Cadmium Plated NC-3A Nut, Self-Locking, 4-50? F, Reduced Hexagon, Reduced Height, ant Steel Metals; Test Methods Motor, Direct Current, Speci- I (Copies of specifications, standards, drawings, and publications required by contrac-tors in connection with specific procurement fu
6、nc- tions should be obtained from the procuring activity or as directed I specification to the extent specified herein. Unless otherwise in- dicated, the issue in effect on date of invitation for bids or request NAS-620 Washer, Plain I (National Aircraft Standards may be obtained from National Stand
7、- ards Association, Inc., 1321 Fourteenth St. N. W., Washington, D. C. ,1 Preproduction sample. Unless otherwise specified in the contract or order, a preproduction sawple shall be provided and shall: (a) Be manufactured according to procedures proposed for the Licensed by Information Handling Servi
8、cesMIL-M-82433A 13 9 7777706 03bOb37 8 (b) Consist of nine motors. (c) Be tested as specified in Section 4 herein and is for the pur- pose of determining, prior to starting production, that the contractors production methods are capable of yielding items that comply with the technical requirements o
9、f the contract. 3.2 Basic requirements 3.2.1 Contractor-furnished data. No data is required by this specifica- tion or by applicable documents referenced in Section 2 unless specified in the contract or order (see 6.2). 3.2.2 Materials and treatments of materials and parts. Unless other- wise spec2f
10、ied in the contract or order, all materials and treatments of materials and parts used in the manufacture of the motor shall be in accordance with the requirements specified herein and with the require- ments and documents shown on the Specification Control Drawing 2540053. 3.2.3 Inspection and test
11、 equipment and facilities. The supplier shall furnish and maintain all necessary inspection and test equipment facili- ties, and shall provide personnel for performing all quality conformance tests specified herein. The test equipment shall be adequate to permit performance of the required quality c
12、onformance tests for the motor. 3.2.4 Dissimilar metals. Unless suitably protected against electrolyt- ic corrosion, dissimilar metals shall not be used in contact with each other. Dissimilar metals are defined in bEL-SPD-889. 3.2.5 Soldering. All solder connections shall be made in accordance with
13、m- -440. 3.2.6 Fungus proof material. Materials that are nutrients for fungi shall not be used unless necessary. they shall be treated with a fungicidal agent. Where used and not hermetically sealed, 3.2.7 Fuel compatability. The exterior of the motor may be exposed to splashing by the torpedo prope
14、llant, a liquid fuel known as Otto Fuel Composition II. straightchain hydrocarbons. with both silicone and fluoro carbon-based lubricants. The fuel is com- patible with some nonmetals and incompatible, more or less, with others. The approved nonmetallic materials- are listed below. This is a nitrate
15、 ester based propellant diluted with The fuel is compatible with al1 metals and (a) Fluoro carbons (Teflon and Kel-F) (b ) Polyethelene 3 i Licensed by Information Handling ServicesMIL-M-82933A 13 9977906 0360b20 4 111 - MIL -M-8243 3A ( OS) (c) Neoprene (a) Glass In the event that other nonmetals a
16、re proposed for use in the exteri- or structure of the motor, samples of such materials shall be submit- ted to the procuring authority for test and approval. 3.3 Performance and product requirements 3.3.1 Function. The motor drives a control surface through a worm gear actuator in response to the c
17、ontrol voltage which reverses in polarity at approximately 5 Hertz (Hz). an integral gear reduction unit to obtain the required speed and torque. The motor is expected to have 3.3.2 Electrical - requirements 3.3.2.1 Supply voltage. The specification center supply or input The supply voltage range sh
18、all be 35 to voltage shall be 38 volts. 41 volts dc. 3.3.2.2 No-load speed. The output shaft speed at no-load condition and 38 volts input shall be 120 Sr5 rpm, taking the average of two di- rections. exceed 4 rpm. shall be within 50 ir5 percent of the average of speeds obtained with 38 volts input.
19、 The motor shall be at room temperature (65-95 degrees Fahrenheit (F). The difference of speeds in the two directions shall not The average of speeds with 19 volts input at no-load The sampling period shall not exceed 3 seconds. 3.3.2.3 No-load current. The motor current at no-load condition, 38 vol
20、ts input, and at room temperature shall be less than 0.220 ampere. Motor currents, in two directions, shall have an average of less than 0.220 ampere and the difference of the two currents shall be less that i5 percent of the average value. 3.3.2.4 Loading. The rated load shall be 100 ounce-inches.
21、The normal loading is expected to vary from O to 100 ounce-inches. 3.3.2.5 Speed 3.3.2.5.1 Speed at rated load. The output shaft speed in either direction at rated load of 100 ounce-inches, with 38 volts input and with motor initially at room temperature (65-95 degrees F), shall be greater than 83 p
22、ercent of the average no-load speed ( 3 . 3.2.2) 4 Licensed by Information Handling ServicesMIL-M-Zq33A 13 m 99999Ob 0360621 b 9 MIL-M-8243%( OS) 3.3.2.5.2 Speed at overload. The output shaft speed in either direc- tion at an overload of 300 +6 inch-ounces, with 38 volts applied and with the motor i
23、nitially at room temperature (65-95 degrees F), shall be greater than 50 percent of the average no-load speed (3.3.2.2). 3.3.2.6 Stall current. The design stail current at room temperature with 38 volts input shall not exceed 3.0 amperes. 3.3.2.7 Motor Stability. The motor shall be capable of repeat
24、ed sudden This shall reversais of direction of rotation ( tpuggingt) at maxliuum input vo-Eage (41 VdC) without deterioration of the permanent magnet field. be indicated by stability of the no-load speed of the motor, before and after a series of instantaneous reversals of polarity of the input volt
25、age. 3,3.2*8 Motor Time Constant. Under no-load condition, at room tempera- .ture, and with 38 volts step input, .the motor time constant for either direction of rotation shall not exceed 12 milliseconds. is defined as the time required for the motor to accelerate from rest to 63 percent of fina spe
26、ed after application of a step voltage input. The time constant 3.3.2.9 Shaft rotation and terminal marking. One input terminal or lead shall be marked (+) and/or color coded red in such a way that with posi- tive voltage applied a.t this connection the output shaft rotation shall be in the counterc
27、lockwise direction when looking at the shaft end of the mot or. 3.3.2.10 Insuation resistance. The resistance between the motor cir- cuit and .the motor frame shall exceed 100 megohms when tested at 200 vdc potential. 3.3.3 Duty cycle. The duty cycle shall consist of 10 minutes operat- ing time foll
28、owed by a minimum of 30 minutes nonoperating time. lowing conditions shall exist during the operating time: energized by a reversing waveform approximating a square wave at 5.00 40.25 Hertz (Hz) at 38 -t 0-2.0 volts line-to-line. a reversing time of less than LOO microseconds. Load applied to the ou
29、t- put shaft shall increase linearly with angular rotation in each direction fromthe null position at a rate of 2.0 k0.2 ounce-inches per degree. The null position is defined as the point of zero load, or where the load changes direction. The anibient temperature may be a% any temperature within the
30、 operating range O to f200 degrees F. !The fol- the motor is The waveform shall have 5 Licensed by Information Handling ServicesMCL-M-82433( OS) 3.3.4 Operating Life. The motor operating life shall be 25 hours of cumulative operating time through repeated duty cycles, as specif- ied in 3.3.3, for a
31、total of i50 duty cycles. Acceptable perform- ance of operating life is defined: the motor shall satisfactorily complete the 25 hours of operation and, subsequently, the quality conformance tests of 4.7 with the following modifications: (a) Due to expected buildup of brush residue during motor opera
32、tion, the requirement on insulation resistance (4.7.3.1) shall be not less than 10,000 ohms for motors that have been subjected to life test. (b) The requirement on no-load speed (4.7.3.2) for motors that have been subjected to life test shall be 127 rpm maximum and il3 rpm minimum. The speeds in op
33、posite directions, after life test, shall not differ by more than 6 rpm. 3.3.5 Strength of wire or terminal connections. Each of the elec- trical connecting wires or terminals shall be capable of withstand- ing a pull test of five pounds. 3.3.6 Brush fitment. Prior to quality conformance testing, in
34、 order to fit the brushes to the commutator and stabilize motor char- acteristics, each motor shall be operated at 26.0 54.0 vdc for from 10 to 30 minutes in each disection, repeated for a number of such cycles to give a total run-in time of at least 12 hours. 3.3.7 Commutation noise. The ac compone
35、nt of thkkaotor current, when running at no-load and at nominal voltage, shall contain a min- imum of radiofrequency components and shall be relatively free of other sharp discontinuities. exceed 0.75 volt when measured as directed in 4.7.3.10. The commutation noise-level shall not 3.4 Environmental
36、 requirements. The motor shall be capable of meeting all performance and product requirements of this specifica- tion after being exposed to the followhg environments and conditions: NOTE 3.4 . 1 Vibration Licensed by Information Handling ServicesMIL-N-82Lt33A 13 m 7977906 0360b23 T m 1L-M-82433( OS
37、) 3.4. I. 1 Vibration; ready and ready nonoperating condition. The motor, mounted as shown in Figure 1, shall be capable of meeting the performance requirements after being subjected, in the ready condition, to the vibra- tions defined in Table I. each in its longitudinal axis and in two imituaUy pe
38、rpendicular transverse axes a% any temperature within the range of -45F to t-140“F. is defined in 6.3.1. The motor shall be vibrated for i80 minutes Vibration 3.4.1.2 Vibration; packed. The motor shall be capable of meeting the performance requirements after being subjected, in the packed condition
39、(see 5,2), to the vibrations shown in Table I. Table I Vibration Schedule Condition Double Amplitude Acceleration (see 6.3.2) (in.) Minimum (gs) Minimum Packed - 1.0 I I I Ready Nonoper - ating and Ready 0.2 - 0.036 - 3 .o - I lo I ! I ?re quenc y Range (Hz) 5 minimum 5 - 17 17 - 40 40 - 74 74 - 500
40、 3.4.2 ing the shock of being dropped on a nonyielding surface from a height of 36 inches. Additionally, the motor, in the condition shown in Table II, shall withstand shocks specified in Table TI, Shock. The packed motor (see 5.2) shall be capable of withstand- 7 Licensed by Information Handling Se
41、rvicesMIL-M-82433A( OS) X AXIS Y AXIS AFT z AXIS 4 HOLES, O, 175 SPACED ON BOLTCENTER 1 531 DIAMETER TYPICAL TEST STAND CON FI GUR ATION 8 Figure 1. Motor Axis Orientation and Mounting Details Licensed by Information Handling ServicesMIL-M-82433A i13 W 06 0360b25 3 m MIL-M-82433( OS) Table II Shock
42、Schedule I Number Condition Peak Magnitude Minimum Duration Acceleration of (see 6.3.2) (gs). (ms 1 Direction* Impacte Ready nonoperating 60 +io$ 8.0 to 10.0 X, Y or z 9 Axis Ready 45 +lo% 18.0 to 20.0 z his- 3 Forward 85 +io$ 0.5 to 1.5 X, Y or 2 6 Axis . 300 -rio$ 0.5 to 1.5 Z Axis-Aft 3 i *See Fi
43、gure 1 for axes of motor. 3.4.3 Acceleration. The motor shall withstand the accelerations spec- ified in Table III (see Figure 1). Table III Acceleration Schedule c Condit ion Magnitude Acceleration (see 6.3.2) ks) Direction Ready 25 +io$ ZAxis - FOrwmd 35 +I% Z Axis - Aft 3.4.4 Temperature. The mot
44、or shall be capable of withstanding the tem- peratures for the following specified conditions: 3.4.4.1 Nonoperating and ready nonoperating. The motor shall be cap- able of meeti.pg the performance requirements subsequent to withstanding, in the nonoperating condition, environmental temperatures betw
45、een -45F and +140F. Temperature is defined in 6.3.5. 9 Licensed by Information Handling ServicesMIL-M-2433A 13 9 7797706 0360626 5 3.4.4.2 specified in 3.3.3 at mient temperatures from O degrees to +200 degrees F. Operating. The motor shall be capable of operating as 3.4.5 Humidity. The motor shall
46、withstand exposure to 95 percent relative humidity at 110 degrees F for 8 hours without degradation of performance. 3.4.6 Ehclosure. The motor shall have a splashproof .enclosure that is sufficiently watertight to ,withstand the test of 4.5.2.6. 3.4.7 Pressure. The motor shall be capable of withstan
47、ding pres- sures in the ready, nonoperating condition in the range of 2.7 psia to 20 psia; the maximum rate of change of pressure shall be 0.5 psi per second. range i5 to 20 psia. Pressures in the operating condition will be in the 3.5 Workmanship. Workmanship and finish shall be of sufficiently hig
48、h grade to assure satisfactory operation consistent with require- ments of this specification. All parts used in the motor shall be thoroughly clean and free of excess material, chips, and loose or spattered foreign materials. in any approved preproduction smle, subject to any qualification stated i
49、n the Governments notice of approval, shall be determinative of requirements of the contract relative to workmanship insofar as not specifically covered by applicable specifications. Standards of workmanship exhibited 4. QUALITY ASSLTRANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase. order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the suppli- er may use his own or any o
