1、 - - i s- 37- u. - MIL-T-22913C( OS) 6 April 1971 Superseding MIL-T-22913B( Wep) L .j 22 January 1964 MILITARY SPECIFICXIIION TIMER (For Torpedo Mark 37 Mod 2) This specification has been approved by the Naval Ordnance Systems Cornniand, Department of the Navy 1. SCOPE 1.1 Scope. This specification
2、establishes the requirements for the procurement of a timer, N Zinc Chromate, Low Moisture Sensitivity Anodize Coatings for Aluminum and iUundnum Alloys Wire; Electrical (Insulated, High Temperature) -. , - . jr Y, THIS DOCUMENT CONTAINS 2 3 PAGES. Provided by IHSNot for ResaleNo reproduction or net
3、working permitted without license from IHS-,-,- MIL-T-227L3C 13 777770b 0302877 L1 H MIET-22913C( OS) 1-82590 SAIiDARDS bilitary m-sr-129 MIL- SrD-147 DRBwNGS Naval Ordnance Systems Command WVORD D 162545 Environmental Requirements and Tests (For Torpedo Mk 37 Com- ponent s and Assedlies) king for s
4、hipment t%on, kicagb, .ininois 66060 ) American prucking Association, Inc, Publication Motor Freight Clasification RuLes (Application for copies should be addressed to the Issuing Officer, American Trucking Association, nc., 1424 16th Sto, N. W., Washington, D. C. 20036.) 3.1 Ikscri tion. The timer,
5、 mounted in the control unit, NAVORD LD i625*s of a 400 Hertz (Hz), 11$.volt root mean square (rms), three phase motor which drives, through appropriate geasing, six sets of cam-operated switches and two continuous type potentio- met ers . (a) it controls the sequence and duration of application of
6、24 volts (b) It amplitude-modulates a 90 volt rms, 400 Hz signal. (c)“ It anplitude-mduiates a i4 volt rms, 400 Hz si. dc to certain torpedo control circuits on a repeat-cycle basis. All external electrical connections to the timer are made through a single connector mounted on the timer frame. 3.2
7、General requirements 3.2,1 Data required, No data is required by this specification (other than reports accompanying samples submitted far preproduction and periodic .-. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-22913C( OS) production t
8、esting), or by applicable documents referenced in Section 2, unless specified In the contract or order (see 6.2). 3.2.2 Freproduction sanple. UPless otherwise specified in the con- tract or order, preproduction samples of the tWr shall be manufactured using the methods and procedures proposed for th
9、e pl?oduction lot. These units shall be tested as specified in Section 4 herein and are for the purpose of determining, prior to starting prnduction, that the contrac- tor?s production methods axe capable of producing timers that comply with the technical requirements of the contract, See 4.3.1. 3.2
10、.3 Materials, Unless otherwise specified In the contract, requi- sition, or order, all materiab and purchased parts entering into the final assenibly of the timer shU conform to the detailed requirements indicated on NAVORD Drawing 2209073. and to this specification. 3.2.3.1 Hookup wire. Unless athe
11、rwise specified, all hookup wre used in the timer shall conform to MIL-W-16878, 3.2.3.2 Mercury and silicones. Materials capable of giving off either mercury or silicone vapor, when subjected to temperatures within the op- erating range of the timer, shall not be used. 3.2.4 Finishes, coatings, cons
12、truction, and dimensions. Finishes, coatings, construction, and dimensions for the timer shall be in accord- v: ance stk the applicabie drawings, specifications, and publications listed in NAVORD Drawing 22090710 3.2.bl Muiuinm alloy parts. Aluminum and aluminum alloys, if used, 3.2.4.2 Magnesium al
13、loy parts. Magnesium and magnesium alloys, if shall be anodized in accordance with MIL-A-8625, Ty-pe I. used, shall be treated in accordance with MIII-M-, Typ III, followed by two coats of priming per 1-1-8585. 302.5 MoZsture, fungus, and corrosion. The timer shall be rendered moisture, fungus, and
14、corrosion resistant as required by OS 6341. 3.2.5.1 I_ Ferrous metal parts. Electrical sheet steel assemblies shell be processe by accepted comercial niethods to provide protection against corrosione ?here,other noncorrosion resistant ferrous metais must be used, the exposed surfaces shall be zinc p
15、lated in accordasice with QQ-Z-,?5, Type II, Class 3. 3,2.6 Marking. Marking of assemblies, subasseniblies, and parts shaU be in accordance with the applicable drawings listed in NAVORD ?Drawing 220971. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
16、-,-MIL-T-22713C 13 = 777770b 0302880 MIL-T-22913C( OS) 3.2.7 Threads. Unless otherwise specified, all threads shcll be in accordance with the NationaZ Bureau of Standards Handbook -8. class or fit for threads shall be as specified on the applicable drawings. The 3.2.8 Conflicting requirements. In th
17、e event of conflict between the documents referenced herein and the contents of this specifics- - tion, the contents of this specification shall apply. 3.3 Performance requirements and product characteristics, The timer shall meet the following performance requirements arid product character- istics
18、: 3*3.1 Perf ormance requlrement s (a) Voltage, The input voltage shall be 3 phase, US volts rms plus or minus 3 percent average line to line voltage, with the difference be- tween any two line voltages not exceeding l2 volts rms. L (b) Frequency. The input frequency shall be 4420 Hz plus or minus 2
19、 percent . (c) - Power. The input power to the timer motor, when operating the steady state mechanical lo 270 degrees plus or minus 2 de,grees. The end orf the Winding shall be connected to the start of the winding at the zero degrees tap. cal degrees of the starrt of the winding. Zero degrees; 90 d
20、egrees plus or minus 2 dc grees; The end of %he winding sha31 be within two mecani- 8 J Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-lL-T-22Q13C( OS) (e) Linearritz. Pius or 90 degrees plus or minus 2 degrees; 180 degrees plus or minus 2 degrees;
21、270 degrees plus or minus 2 degrees. The end of the winding shall be connected to the start of the winding at the zero degrees tap. The end of the winding shall be within two niechan- ical degrees of the stmt of the winding. (e) Linearityp pius or minus one percent. (f) Resolution. (g) A minimum of
22、1000 turns of wire per potentiometer. The potentiomter shall be capable of withstanding 500 volts rms, 60 Hertz between its terminals and its chassis mount. (h) The potentiometer shall be capable of withstanding any environ- mental condition that may resuit due to testing the timer as specified in 3
23、.4, SIritch circuits 6 and 7 shall be con- There shall be no other electrical connections 3.302.4 internal conditions. nected to the O degree and 180 degrees tap of potentiometer 155 as shown in NAVORD Drawing 2209071. made between the motor circuit, any of the switch circuits, and either of the pot
24、entiometer circ%ts, to the timer frame. No circuit within the timer shall be connected 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MTL-T-22913C( OS) I 3.3.3 Mechanical alignment 1 3.3.3.1 Potentiometer wiper arms. With the two potentiometers ge
25、ared together, the wiperc arms shall be no more than 2.5 degrees out of phase and will not change when subjected to the condi;ions specified in 3.4. Switch circuit 6 shdl break and 3.3.3.2 Switch circuits 6 and 7. switch circuit 7 shall make within those limits specified in Table II, one plus 0.05,
26、minus 0.25 second before the wiper arm in potentiometer 155 reaches 9 degrees, as defined in 4.5.4.3(e), when the repeat cycle time of circuits 6 and 7 meets the requirements of 3.3.1.3.1. circuit 7 shall break and switch circuit 6 sha. make within those linits specified in Table II, one plus 0.05,
27、minus 0.25 second before the wiper arm in potentiometer i55 reaches 270 degrees, as defined in 4.5.4.3( c), when the repeat cycle time of circuits 6 and j meets the requirements of 3.3.1.3.1. There shall be a break-before-make condition in the switching of circuits 6 an 7. Switch 3.4 Environmental r
28、equirements. The timer shall meet the other ap- plicable requirements of this specification during or after the tests defined or specified in 4.5. 3.4.1 Vibration. The timer shall meet the following vibration re- quirement s : d 3.4.1.1 Vibration, nonoperating, The timer shall show no damage and , s
29、hall meet all the performance requirements and product characteristics of this specification afier being tested as in 4.4,1.2. 3.4.1.2 Vibration, operating. !The timer shall show no damage and shall meet all the performance requirements and product chexacteristics of this specification during and af
30、ter the test specified in 4.4.1.3. 3.4.2 Temperature and humidity 3.4.2.1 Eigh temperature and humidity, nonoperating. The timer shall show no damage and shall meet all the performance requirements and product characteristics of this specification after being tested as in 4.4.2.1. 3.4.2.2 High tempe
31、rature, operating. The timer shall be capable of meting all the performance requirements of this specification while undergoins the test specified in 4.4.2.2, 3.4.2.3 Low tmmperature, nonoperating. The timer shall meet all the performance requirements and product characteristics of this specificatio
32、n after being tested as in 4.4.2.3. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- I I MIL-T-22913C 13 9999706 0302886 5 L- XIL-T=22913C( OS) 3.4.2.4 Low temperature, operatini;. The tmer shall be capable of meeting all the performance requireme
33、nts of this specification while undergoiing tne test specified in 4,4.2,4. 3.5 Cleanw. prior to and after final assembly, all parts, components, and the assenibly shell be thoroughly cleaned of loose, spattered, or excess solder, metal chips, and other foreign matter. Burrs and sharp edges, as well
34、as rosin flash, shall be removed. 3.6 Worwnship. The equipment, including all parts and accessories, shall be constructed and finished in a manner to ensure compliance w5th all requirements of this specification. paid to neatness and thoroughness of soldering, wiring, masking of parts, and assenibli
35、es, impregnation of coils, plating, painting, machine screw assemblage, welding, riveting, brazing, and freedom of parts *om aJ-1 burrs and sharp edges. The standards of workmanship exhibited in any approved preproduction sample, subject to any qualification sta%ed in the Governments notice of appro
36、val, shall be determinative of the re- quirements of the contract relative to worhanship insofar as not specifj.cally covered by applicable specifications 4. QUALITY ASSITRANCE PROVISONS Particular attention shall be 4.1 Responsibility for inspection. Unless otherwise specified in the -_ contract or
37、 purchase order, tne supplier is responsible for the perform- ance of all inspection requirements as specified herein, wise specified in the contract or order, the supplier msy use his own or any other facilities suitable for the performance of the inspection re- quirements specified herein, unless
38、disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections we deemed necessary to assure supplies and services conform to prescribed requirements. ESccept as other- 4.2 Classification of inspections. Inspec
39、tion of the timer shell be classified as follows: (a) Preproduction inspection (paragraph 4.4) (b) (c) Quality conformance inspection (paragraph 4.5) Periodic production inspection (paragraph 4.4) 4.3 SampliFg 4.3.1 Preproduction. A preproduction sample of five timers, mu- factured in accordance wit
40、h 3.2.2, shall he svbjected to the preproduction tests detailed in 4.4 at an activity designated by the procuring activity. 11 I- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-227L3C 13 777770b 0302887 7 W - MIL-T-22913C( OS) W I Acceptance o
41、f the preproduction sample skiall be based on no defects in the sample. Further production of the timer by the supplier, prior to the approval of the preproduction sample, shall be at the suppliers risk. 4.3.2 Lot size, Unless otherwise specified in the contract or order, . each shipment of units of
42、 product shall be a separate “inspection lot“ and may differ from the quantity specified in the total order or con- tract. In any event, all units of a single “inspection lot shall be mBde to the same design, with the same materials and manufacturing techniques, and shall be part of one continuous p
43、roduction run. 4,3.3 Periodic production samples. From each succeeding lot or grand lot of 30 or less that have passed the quality confomnance inspection of 4.5, a random sample of five timers will be selected for submission to an activity designated by the procuring activity to determine compliance
44、 of the samples with the requirements of the contract, specification, and drawings. The timers shall be considered satisfactory,if they meet all specification and pertinent drawings requirements and withstand the tests specified in 4.4 and 4.5. Failure of the periodic production sample to comply wit
45、h these requirements will result in the rejection of the lot, as Getermined by the procuring activity. accepted will be applied as part of the quantity specified by the con- tract or order, but shall not be used in any equipment manufactured for the Government. Periodic production samples 4.4 9eprod
46、ilction and periodic production inspection. The preproduction and periodic production samples, after satisfactorily passing the quality conformance inspections detailed in 4.5, shall be subjected to the fol- lowing tests and examinations. results of preproduction and periodic production inspections
47、shall be for- warded to the procuring activity, Certified inspection data covering the 4 4.1 Vibration 4.4.i.i Mounting, The timer, less pack or packaging, sM1 be mounted by means of its mounting holes as shown on NAVORD Dwg 2209071 and tested as specified in 4.4.1.2 and 4.4.1.3. 4.4.1,2 vibration,
48、nenoperating, The timer shall be subjected to the “Vibration, nonoperating“ test of m-82590 and thereafter ahal?. meet the requirements of 3.4.1.1. 4.k1.3 Vibration, operating. The timer shall be subjected to the “Vibration, operating“ test of m-82590 and durEng and thereafter hall meet the requirem
49、ents of 3.4.1.2. V u- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-227L3C 13 E 777770b 0302888 7 - - L MIL-T-22913C( OS) 4.4.2 Temperature and humidity 4.4.2.1 High temperature and humidity, nonoperating, The timer shall be subjected to the “High temperature and humidity, nonoperating“ test of
