1、- _ - MIL-G-24464A(SH) SUPERSEDING MIL-G-24464 (SHIPS) 20 January 1973 28 April 1972 (See 6.4) MILITARY SPECIFICATION GENERATOR SET, GAS TURBINE, MAGNETIC MINESFIEEPING, 1750 KILOWATT This specification is approved for use.by the Naval Sea Systems Command and is avail- able for use by all Department
2、s and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers a 1750-kilowatt (kw) impulse type, direct current (d.c.) minesweeping generator set and associated control equipment (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents, of the issue i
3、n effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS FEDERAL FF-B-171 - Bearings, Ball, Annular (General Purpose). FF-B-185 - Bearings, Roller, Cylindrical; and Bearings, Roller, Self-Aligning. TT-P-645 - Pri
4、mer, Paint, Zinc-Chromate, Alkyd Type. a e MILITARY MIL-C-104 - Crates, Wood; Lumber and Plywood Sheathed, Nailed and Bolted. MIL-P-116 - Preservation-Packaging, Methods of. MIL-B-117 - Bags, Sleeves and Tubing - Interior Packaging. MIL-R-196 - Repair Parts for Internal Combustion Engines, Packaging
5、 of. MIL-B-233 - Boxes, Repair Parts, Storage. MIL-S-901 - Shock Tests, H.I. (High-Impact); Shipboard,Machinery, Equipment MIL-A-907 - Antiseize Compound, High Temperature. MIL-E-917 - Electric Power Equipment, Basic Requirements for (Naval Shipboard MIL-M-2130 - Motor-Generators, General Purpose (N
6、aval Shipboard Use). MIL-C-2212 - Controllers, Electric Motor, A.C. or D.C. and Associated Switching MIL-G-3111 - Generators, Electric, Direct-Current (Naval Shipboard Use). MIL-E-5607 - Engine, Gas Turbine, Preparation for Storage and Shipment of, MIL-A-8625 - Anodic Coatings, for Aluminum and Alum
7、inum Alloys. MIL-P-15024 - Plates, Tags and Bands for Identification of Equipment. MIL-P-15024/5 - Plates, Identification. MIL-E-15090 - Enamel, Equipment, Light-Gray (Formula No. 111). MIL-P-15328 - Primer (Wash) Pretreatment, Blue (Formula No. 117-B For Metals) MIL-L-15719 - Lubricating Grease (Hi
8、gh-Temperature, Electric Motor, Ball and MIL-C-15730 - Coolers, Fluid, Industrial, Naval Shipboard: Lubricating Oil, and Systems, Requirements.for. Use). Devices, Naval Shipboard. Process for. Roller Bearings). Hydraulic Oil, and Fresh Water. Beneficial comments (recommendatjons, additions, deletion
9、s) and any pertinent data which may be of use in iiziproving-this document should be addressed to: Commander, Naval Ship Engineering Center, SEC 6124, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at th
10、e end of this document or by letter. / al? Y THIS DOCUMENT CONTAINS I -/ PAGES. i* Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I_ MIL-G-24464A LO I 77777Ob 0304333 3 MIL-G-24 464A (SH) a MILITARY (continued) MIL-M-16034 - Meters, Electrical-Indic
11、ating (Switchboard and Portable Types). MIL-1-16165 - Interference Shielding, Engine Electrical Systems. MIL-C-16173 - Corrosion Preventive Compound, Solvent Cutback, Cold Application. MIL-E-16298 - Electric Machines Having Rotating Parts and Associated Repair Parts: Packaging of. MIL-P-17286 - Prop
12、ulsion and Auxiliary Steam Turbines and Gears (Including Repair Parts, Tools, Accessories and Instruments); Packaging of. MIL-E-17341 - Engines, Gas Turbine, Propulsion and Auxiliary, Naval Shipboard. MIL-E-17555 - Electronic and Electrical Equipment, Accessories, and Repair Parts: Packaging and Pac
13、king of. MIL-F-18866 - Fittings, Flared Tube, 37-DegreeI Steel. MIL-C-19836 - Coolers, Fluid, Industrial, Air, Motor and Generator, Naval Shipboard. MIL-F-20670 - Flanges, Pipe, Carbon Steel 150 P.S.I., W.S.P. (For Naval Ship- board Use). MIL-M-24365 - Maintenance Engineering Analysis: Establishment
14、 of, and Proce- dures and Formats for Associated Docmentation; General Speci- fication for. DOD-G-24508 - Grease, High Performance, Multi-Purpose (METRIC). STANDARDS MILITARY MIL-STD-108 - Definitions of and Basic Requirements for Enclosures for MIL-STD-129 - Marking for Shipment and Storage. MIL-ST
15、D-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environ- MIL-STD-242 - Electronic Equipment Parts (Selected Standards). MIL-STD-278 - Fabrication Welding and Inspection; and Casting Inspection and Repair For Machinery, Piping and Pressure Vessels-ih Ships of the United States Navy.
16、MIL-STD-471 - Maintainability Demonstration. MIL-STD-721 - Definitions of Effectiveness Terms for. Reliability , Maintain- ability, Human Factors, and Safety. MIL-STD-749 - Preparation and Submission of Data for Approval of Nonstandard Parts. MIL-STD-781 - Reliability Tests: Exponential Distribution
17、. MIL-STD-1186 - Cushioning, Anchoring, Bracing, Blocking and Waterprdfing with MIL-STD-1552 - Provisioning Technical Documentation, Uniform DOD Requirements MIL-STD-1561 - Provisioning Procedures, Uniform DOD. MS17830 - Nut, Self-Locking, Hexagon-Regular IIeight, 250F (Non-Metallic Electric and Ele
18、ctronic Equipment. mental and Type II - Internally Excited). Appropriate Test Methods. for. Insert) 300 Series Corrosion Resistant Steel. PUBLICATION MILITARY NAVSHIPS 0943-015-6010 - Sliding Surface Bearing Standardization Manual. NAVSEA 0981-LP-052-8140 - Electrical Equipment Small Tray Magnetic F
19、ield Manual for Design of. (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 extent specified herein. Unless otherwi
20、se indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. 2.2 Other publications. The following documents form a part of this specification to UNIFORM CLASSIFICATION COMMITTEE Uniform Freight Classification Ratings, Rules, and Regulations. (Application for
21、 coxies should be addressed to the Uniform Classification Committee, - - Agent, G. F. Earl, Tariff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago; IL 60606.) 2 - . . . . . -. - .r . . . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
22、S-,-,-NIL-G-24qb4A LO m 9979906 0304332 5 - MIL-G-24464A (SH) NATIONAL CLASSIFICATION BOARD National Motor Freight Classification Classes and Rules. (Application for copies should be addressed to the ATA Tariff Section, 1616 P Street, N.W., Washington, DC 20036.) NATIONAL BUREAU OF STANDARDS Handboo
23、k H28 - Screw Thread Standards for Federal Services. (Application for copies should be addressed to the Superintendent of Documents, Govern- (Technical society and technical association specifications and standards are generally ment Printing Office, Washington, DC 20402.) available for reference fr
24、om libraries. They are also distributed among technical groups and using Federal agencies.) 3. REQUIREMENTS 3.1 Generator set and associated control equipment. Generator set shall consist of a gas turbine engine geared to a d.c. generator and a fly wheel all mounted on a comnon subbase. Associated c
25、ontrol equipment shall consist of a motor-generator exciter set, switchboard, an auxiliary controller, contactor panel, transfer panel, synchronizer signal source, and nec- essary appurtenances to constitute a complete electrical system for the generation and con- trol of the magnetic minesweeping p
26、ower specified herein. 3.2 General requirements. 3.2.1 Limitations. 3.2.1.1 Size and weight. Generator set complete with subbase and attached accessories shall not exceedtheollowing: Length - 12 feet (ft) 2 inches (in) Width - 6 ft 6 in Height - 7 ft O in Weight - 25,000 pounds (lbs) 3.2.1.2 Magneti
27、c material limitations. Magnetic materials shall not be used except for necessary magnetic circuits of electrical equipment. as those materials having a permeability o less than 1.2 before fabrication and not greater than 2.0 after fabrication as measured in a 200 Oersted field. Nonmagnetic material
28、s are defined 3.2.1.3 Stray magnetic field limitations. Electric circuits shall be designed for self compensation of stray magnetic fields. is contained in NAVSEA 0981-LP-052-8140. Numerical values of stray magnetic field limits Information on minimizing stray magnetic fields are given in a classifi
29、ed amenbent to this specification. 3.2.1.4 Ea current field limitations. To limit magnetic fields due to eddy currents induced by movement in the earths field, the subbase and large components shall be construc- ted of low conductivity material or shall be assembled with inserts o nonconbucting mate
30、rial, 1 so arranged as to limit the size of any closed loop area to 5 square feet (ft 1. ponents shall be insulated from each other to avoid loop areas greater than 5 ft2 unless they are manufactured of low conductivity material. material having a conductivity not greater than 10 percent of that of
31、copper. shall loop areas exceed 100 ft . from the subbase or shall have nonmetallic inserts so arranged that insulating inserts are not short circuited. Major com- Low conductivity material is defined as In no case 2 Fuel and oil lines and armored cable shall be isolated 3.2.2 Shock resistance. Equi
32、pment shall meet the grade A, class I, type A requirements 3.2.3 Material. . of MIL-S-O. under the extreme conditions of heat, moisture, vibration, and shock encountered onboard ship. Reclaimed materials shall be used to the maximum extent possible, bolts and tapped holes, or other means satisfactor
33、y to the command or agency concerned as are required for lifting and handling. Material shall be such as to insure continued satisfactory operation 3.2.4 Lifting gear. Heavy pieces of equipment shall be provided with nonmagnetic eye- 3 Provided by IHSNot for ResaleNo reproduction or networking permi
34、tted without license from IHS-,-,-MIL-G-ZVVbVA LO m 7999906 030V333 7 II MIL-G-24464A (SH) 3.2.5 Q Inclined operation. Unit shall operate in accordance w$th the requirements herein when inclined permanently up to 15 degrees to either side or 5 degrees on either end from the normal horizontal positio
35、n and with a momentary inclination of 45 degrees to either side simulating the roll of the ship, or by momentary end tilting of 10 degrees. Momentary herein means for a period up to 10 seconds. 3.2.6 Paintin . Surfaces of metallic components, except working surfaces of machined parts, machined surja
36、ces of couplings, shafts and similar items manufactured of corrosion- resistant material and high temperature parts of gas turbines shall be given one pretreatment coating in accordance with MIL-P-15328 and one coat of primer in accordance with TT-P-645 prior to assembly. enamel in accordance with c
37、lass 2, type 1 of MIL-E-15090. After assembly, external surfaces shall be given two finish coats of 3.2.7 Weldinq. Welding shall be in accordance with MIL-STD-278. 3.2.7.1 Where equipment uses silver-brazed piping, face feed fittings may be used only in sizes below 1/2 inch. Only preinserted ring fi
38、ttings shall be used in sizes 1/2 inch and above. 3.2.8 Protection against corrosion. In order to prevent deterioration due to corrosion, bolts, nuts, studs, pins, springs, screws, cap screws, and other fastenings or fittings shall be of a corrosion-resisting material as defined in MIL-E-917, or of
39、a material treated in a manner to render it resistant to corrosion. Unpainted surfaces of alumi.num or aluminum alloys shall be treated in accordance with the requirements of MIL-A-8625. dissimilar aluminum alloys or dissimilar metals shall be avoided. Where assembly of dissimilar metals with alumin
40、um alloy is unavoidable, the alloys shall have their faying surfaces anodized, Where aluminum threaded surfaces or fayinq surfaces may require disassembly in service, an Contact between antiseize compound in accordance with kIL-A-907 shall be used. For the assembly of aluminum alloy parts, through-b
41、olting is preferaed, this applies with particular emphasis to compara- tively high stressed assemblies or those subject to vibrating loads. bolts, stud-bolts, or machine screws is necessary, these shall be threaded into corrosion- resisting steel inserts cast or screwed into the aluminum alloy. Inse
42、rts shall be pinned, prick punched, or otherwise secured in such a manner as to prevent their backing out. alloys of copper such as brass or bronze will be acceptable for use in threaded contact with aluminum alloys. 3.2.8.1 Sea water cooled heat exchangers. Sea water cooled heat exchangers for the
43、generator shall be class 2 in accordance with MIL-C-19836. 3.2.9 Identification information plates. Identification plates of corrosion- resisting steel or nickel-copper alloy in accordance with type B or C of MIL-P-15024 and MIL-P-15024/5 shall be furnished for major items of equipment and shall sho
44、w the NAVSEA number of the equipment service manual. with type E of MIL-P-15024 and MIL-P-15024/5 (clear acrylic plastic may be used) unless information plate location temperature is in excess of that for plastics, then type B will be required. 3.2.10 Ball and roller bearings. Ball and roller bearin
45、gs shall be in accordance with FF-B-171 or FF-B-185. Drawings, specifications, manuals, and repair part cartons shall describe completely the bearing manufacturers part designation and its appropriate National stock number. For the generator portion of the set, double-sealed bearings, prelubricated
46、with grease conforming to DOD-G-24508;are preferred. where bearing temperature exceeds 149OC. Where the temperature of the outer race of bearings exceeds llOC (ambient plus heat rise) the bearings shall be heat stabilized to operate at higher than normal temperatures. Criteria for heat stabilization
47、 will be such that the bear- ing operating temperature will not cause the dimensions to increase as much as 0.0001 inch per inch of dimeter when held at a temperature of 300F for 2500 hours. basic requirements of electrical equipment shall be in accordance with MIL-E-917. vibration lidts of MIL-STD-
48、167-1, type I. on the subbase shall meet the mechanical vibration limits of MIL-STD-167-1, type II. Where the use of tap- No The use of magnesium and magnesium alloys is prohibited. Information plates shall be furnished in accordance Use grease conforming to MIL-L-15719 3.2.11 Electrical equipment b
49、asic requirements. Unless otherwise specified herein, the 3.2.12 Mechanical vibration. Vibration sensitive equipment shall meet the mechanical The complete gas turbine generator set mounted 3.2.13 Threads. Threads shall be in accordance with the requirements of Handbook H28. Taper pipe-thread connections shall not be used. welded, flhged, or by fittings in accordance with MIL-F-18866. Fluid connections shall be direct brazed or 4 Provided by IHSNot for ResaleNo reproduction or networking permitted with
