1、 i . . TACHCMEXER GENEEWIDR, AC; GENERAL SPM3IETcATIoN FDR MIXI-2 2 821C 28 November 1990 mmmw MIL-Ip-22821B 18 April 1969 mis specification is appraved for use by all Departmentc and Agencies of the Department of Defense. 1. SCOPE 1.1 scow. n-iis cpecification covers the gene.ra1 requirements for t
2、achmeter generators. conjunction with MIGS-81963 which will form an inherent part of this specification. It is not complete in itself, ht should be uced in 1.2 Classification. 1.2.1 Namenclature. The nomenclature consists of the item name, Tachmeter Generator, followed by a type designation and an u
3、ppercase Mification letter. nomenclature should be electrically and mechanically interchargeable for all military applications. canbination of digits arid letters as explained in the follming paragram. Types other than 115 volts should be prefixed by applicable voltage identification followed by the
4、 letter TIPt, such as I26Vt. nie type designation of a 15M4A is illustrate in Table I. Nomenclature for new or modified tadiCrnieter generator tp will be assigned by the Naval Air Systemc cammand, Department of the Navy. All tachmter generators having the same The type designation is made up of a 1.
5、2.1.1 Size. The first two digits designate the maXinnmi diameter in tenths of an inch. tenths, the next higher tenth is use. If the diamter is not aactly a whole number of I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this docum
6、ent should be addressecl to: Systems Engineering and Standardization Department (Code 53), Naval Air Engineering Center, Lakehurst, NJ 08733-5100, by using the self-addressed Standardization Document Improvement Proposal (O0 Form 1426) appearing at the end of this document or by letter. , FSC 6680 A
7、MSC - N/A DISTRiBUION STATENEXT A. unlimited. Approved for public release; distribution is Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-2282LC bb = 7777706 04bb7b 7 MIWF22821C 1.2.1.2 Function. The succeeding letter group indicates one of th
8、e foilawing functions: RG Rate tach-ter generator M Integrating tachmeter generator, heater ccarcpensated IN Integratiq tach-ter generator, network compensated DG Damping tachmeter generator 1.2.1.3 SUDD IV frequency . The succeding digit(s) identifies the frequency of the per supply in accordance w
9、ith the follming code: 60 400 6 4 New codes acsociated with cilpply frequencies not indicated will be assigned as required by the Naval Air Systems Comman, Department of the Navy. 1.2.1.4 Modification. An UPJW case letter l1AI1 following the frequency digit indicates the basic issue of a standard ta
10、chareter generator. dimensions or the electrical characteristicc of the back type should be indicated by the upper case letter I1Bl1. indicated by nlQ1f is prohibited. me first modification that significantly affects the external Succeeding modifications will be , l1DI1 , etc. , except the use of le
11、tters Vn , I1Lf1 , 81011 , and 1.2.2 Illustration. A tachaneter generator classified as a 15IH4A (see Table I) indicatec the original design of a 115 volt, 400 Hz, heater- campensated, integrating tachmeter generator whcse bdy is greater than 1.40 inchec Ixit not greater than 1.50 inches. voltage re
12、qull.ement of 26 volts, the type designation would be 26V-15lH4A. If the unit had an input 1.2.3 Part identifvira number. The part identifying number (FIN) consists of the letter W1, the bacic number of the specification sheet (not including the revision letter), an assigned dash number, and an uppe
13、r case suffix letter designating the latest modification letter in the type designation, as sham in Table II. 2. APmcABLE- 2.1 Govenmient doc=uments. 2.1.1 SDeC ifications and standards. The foilawing specifications and standardc form a part of this specification to the extent specified herein. Unle
14、ss otherwise specified, the issues of these docimientc are 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-m-22821C those listed in the issue of the ikpartment of Defense index of. specifications and standardc (DODISS) and supplement thereto, cited
15、 in the solicitation. SPEKXFICATIONS MIISTKRY MIGC-13924 Coathq, Oxide, Black, for Fe.rrous Metals MIL-S-81963 serv-nents, Precision Instrument, Rotiting, Common Requk-h and Tests; General Specification for MILrT-22821/1 Tachometer Generator, Type 15IH4 MiT-22821/2 Tachomter Generator, Type 15RG4A M
16、L-W-16878/4 Wire, Electrical, Polytetraflouroethylene . (PTFE), Inculated, 2OO0C, 600 Volts, iwtruded insulation ML-W-16878/6 Wire, Electrical, Polytetmflouroethylene (PTFE), Insulated, 2OO0C, 250 Volts, Esrtruded insulation MIISTARY MIGSTD-1186 cushioning, Anchoring, Bracing, Blmkhq, and Waterproof
17、ing, With Appropriate Test Methods Slotted Corrosion Resisting Steed, Passivated, NF-A (Medium) Series MS35276 Screw, Machne-Drilled Fillister Head, MS35338 Washer, mck-spring, Helical, Regular (Unless otherwise indicated, copies of the referenced federal an military specifications, standards, and h
18、andbookc, are available fram the Naval Publications and Forms Center (ATIW: 700 Robbins Avenue, Philadelphia, PA 19111-5094.) of this document to the extent specified herein. specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicit
19、ation. otherwise specified, the issues of documents not listed the issues of the documents cited in the soiicitation. Documents Wer Deck), Bldg. 4D, 2.2 Non-Governmentpublcations. The following documente form a part Unless otherwise unlecc the DODISS are 3 Provided by IHSNot for ResaleNo reproductio
20、n or networking permitted without license from IHS-,-,-NIL-T-22822C bb 77777Ob 04hb770 5 MlId-22821C AMERICAN GEAR MANUFACIXFGRS ASSOCIATION (AGMA) AGWI 207.06 Tooth Proportions for Fine Pitch Involute Spur and Helical Gears AGMA 2000-A Gear Classification and Inspection Handbook Tolerances and Meas
21、uring Methds for Unassembled Spur and Helical Gears (Inchdm Metric Ekpivalents) (Application for copies should be addressed to the American Gear Manufacturers Association, 1500 King Street, Suite 201, Aiexandria, VA 22314. ) (Non-Government standards and other publications are normally available frm
22、 the organizations that prepare or distribute the documentS. These doc=uments may also be available in or through libraries or other infomtional services.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for associate
23、d detail cpecifications, specification sheets or MS standards), the text of this specification takes precedence. Nothing in this specification, however, supersedec applicable laws and regulations unless a specific exemption has been obtained. 3. RE)IzuIREMIIspTs 3.1 Cibec! ification sheets. The indi
24、vidual item requirements shall be as specified herein, in PEGS-81963, and in accordance with the applicable specification sheets. MIGS-81963, this specification, and the specification sheet, the latter shall govern. subjected to first article inspection (see 4.6 and 6.3) . In the event of any confli
25、ct between requirements of 3.2 First article. When specified in the contract, a sample shall be 3.3 Quality conformance. The tachometer generators furnished under this specification shall be inspcted and pass the quality conformance tests specified herein (see 4.7). 3.4 Parts, materials and processe
26、s. 3.4.1 Parts and materials. Tachometer generators shall be constructed of parts and materials in accordance with MIGS-81963. suitable material is not listed, the material used shall be such that the tachometer generator shall conform to all the requirements of this specification. not be construed
27、as a guarantee of the acceptance of the finished prduct. If a Acceptance or approval of any constituent material shall 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILI-22821C 3.4.2 Rotor shafts and housinSc. an must also specify if a black 6.3
28、First article inmenrpe;rature control an campensation networks are integral parts of such generators. group are characterized by high theoretical stall acceleration figures and law null output, and are employed to stabilize the parent system. 6.6.2 Effective resistance. The effective resistance of a
29、ny winding is equivalent to the being meacured, will consum the came per under identical test conditions. it is equal to the impeaance of a circuit consisting of a capacitance in- parallel with the winding being measured when the capacitor is adjusted for unity mer factor or maximum impedance of the
30、 circuit. specified band of speeds within which performance characteristics are applicable. 6.6.4 Calibration meed . ?iie calibration cpeed of a tachmeter generator is a specified speed within the specified speed range used for standardization and reference purposes. 80 percent of the maximum speed
31、in the sped range. the voltage acxcss the output winding. voltage is that portion of the output voltage of the fundamental frequency that is a function of speed only. it is numerically equal to onehalf the sum of the fundamental output voltages measured at the came sped an test conditions in both di
32、rections of rotation as follows: 6.6.1.3 DanU) hl tachmeter generators. Tachameter generators in this resistance which, when substituted for the winding 6.6.3 SK)?ed rame. “he cpeed range of a tachmeter generator is the The calibration speed is usually 6.6.5 Outi3ut voltaqe. 6.6.5.1 SWd -cencitive o
33、utmut voltaqe. The speed-sensitive output The output voltage of a tachmter generator is 22 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIII-22821C where: V is the magnitude of the Euriolamen tal component of the output voltage. .* 6.6.5.1.1 In-ph
34、ase cxeed -sensitive outwt voitacre. nie in-phase speed-sensitive voltage is that capnent of the speed-sensitive output voltage that has a phase which is the came or 180 degrees from the reference phase. the in-phase speed-sensitive output voltages measured at the same speed and test Conditions in b
35、oth directions of rotation as follows: It is equal to one-half the algebraic difference between Vim - Vim 2 where: Vi is the in-phase cpeed-sencitive output voltage. 6.6.5.1.2 Qua drature-phase sl3eed -sensitive oubut voltaqe. me quadrature-w speed-sensitive output voltage is that component of the s
36、peed-sensitive output voltage that has a phase which is 90 degrees or 270 degrees from the reference phase. difference betwen the quadrature-phase speed-sensitive output voltages measured at the same speed and test conditions in both directions of rotation as follawc: It is equal to one-half the alg
37、ebraic where: Vq is the quadrature-phase speed-sensitive output voltage. 6.6.5.2 Zero-smeeii oubut voltaqe. The zero-spee output voltage of a tachometer generator is the voltage present across the output winding that is a function of rotor position only. 6.6.5.2.1 !lbtal nns null voitacre. The total
38、 rms null voltage of a tachanehanges. this specification are the subject of international standardization agreements reached by the NATO Working Group on Analogue and Digital CeYvocamponentc (AC/301(SG/A) (wG/5). cancellation of this specification is proposed wkich affects or violates the internatio
39、nal agreement concerned, the preparing activity will take appropriate reconciliation action through international standardization channels, L-icludirg departmental standardization offices, if required. 6.10 ADD licable hternational documentation. NAT doc=umentc applicable to this specification are A
40、llied standard Publication (Astarip)-3, Volume 6680 Chapter 2, NATO Electronic/El AStanP-4, Volume 6680 Chapter 2, NATO Eleckonic/Eldxical Technical Recommendation, Tachometer Generators, AC; and Astanp-5, Volume 6680 Chapter 2, NATO Quality Assessment Reconmmdation for Electronic/Electrical Parts,
41、Tachometer Generators, AC. 6.9 International standardization acrreementC. Certain provisions of When amendment, revision, or 28 . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLEI. Ncffnenclature Function (1.2.1.2) Ta&-* Generator supply Modif
42、ication Frequency (1.2.1.3) (1.2 *l. 4) Item Name M Military wignation (1.2.1) -01 (3 22820/1 Specification Dash Latect sheet No. Modification Number Letter 15 Size (1.2.1.1) 4l A 29 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2282- TABLE 1
43、11. standard dimensions for tacheter qene.rators. (See Figure 2 or location of lettere dimensions) Dimencion _1/ A B 2/ -c D E +o. O000 +o. O000 -0.0005 -0.0005 +O. 003 TOleranCe - +o. O10 - +0.010 -0.005 Tachmeter Generator O. 540 0.312 1.437 Size 15 1.312 O. 8750 TOleranCe Tachmter Generator Size
44、15 SPR GEAR DATA F No. of Diametral PreCSUre Teeth Pitch Angle 21 12 o 200 Pitch Outside Dianeter Diane- +o O00 +o. O000 -0.001 -0.0005 O. 185 O. 1872 I Dimencion G H I J AS specified applicable TolmanCe in the - +O. 005 - i-O.005 - +O. 005 TachomAer specification Generator sheet. 0.040 0.132 0.093
45、Size 15 Dimension Toler- Tachmter Generator Size 15 I Ilaot( Diameter I +O. 005 O. 078 - i/ unless specified otherwise, dhmsions are in Bnches. - 2/ B is length for full depth of tooth. - 3/ R is applicable for ternuna lblccks only. 30 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
