1、MIL-S-L7557D 27 W 7797706 OL91b07 3 W MIL-S-19557D (AS) 29 January 1988 SUPERSEDING MIL-S-19557C (AS) 11 September 1972 MILITARY SPE;CIFICATION STARTERS : AIRCRAFT ENGINE, AIR TURBINE, GENERAL SPEIFICATION FOR !this specification is approved for use within the Naval Air Systems Command, Department o
2、f the Navy, and is available for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE. 1.1 Scope. ?his specification establishes the performance, design, qualification, and quality conformance inspection requirements for air turbine starters for aircraft gas turbine engines.
3、2. APPLICABLE DOCUMENTS 2.1 Government documents 2.1.1 Specifications and standards. ?he following specifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Depart
4、ment of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Cornanding Officer, Naval Air
5、Engineering Center, Systems Ehgineering and Standardization Department (SED) Code 53, Lakehurst, NJ 08733-5100, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 2995 DISTRIBUTION STATEMENT A. App
6、roved for public release, distribution is unlimited. / . THIS DOCUMENT CONTAINS PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SPECIFICATICNS FEDERAL A-A-8 8 4 - Tape, Pressure-sensitive Pdhesive, Box Closure mA-250/1 - Aluminum 1100, Plate a
7、nd Sheet PPP-B-6 3 6 - Boxes, Shipping, Fiberboard PPP-C-8 50 - Cushioning Material, Polystrene Expanded, PPP-S-76 O - Strapping, Nonmetallic (and Connectors) Resilient MILIT-ARY MIL-P-116 MIL-B- 12 1 DOD-D-1000 MIL-D-3 4 6 4 MIL-C-5501 MIL-P-7105 MIL-S-7742 MIL-L-7808 MIL-S-8879 MIL-R-20092 MIL-L-2
8、3699 MIL-P-26514 MIL-C-26861 Preservation, Methods of Barrier Material, Grease-proofed, Water- - Drawings, Engineering and Associated Lists Desiccants, Activated, Bagged, Packaging Use and Static Dehumidification Caps and Plugs, Protective, Dust and Moisture Seal Pipe Threads, Taper, Aeronautical Na
9、tional Form, Symbol ANPT, General Requirements for Screw Threads , Standard, Optimum Selected Series: General Specification for Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number 0-148 Screw Threads, Controlled Radius Root with Increased Minor Diameter; General Specification
10、for Rubber or Plastic Sheets and Assembled and Molded Shapes, Synthetic, Foam or Sponge Open Cell (Framed Latex) Lubricating Oil, Aircraft Turbine Engines, Synthetic Base Polyurethane Foam, Rigid or Flexible, for Packaging Cushioning Material, Resilient type, General proofed, Flexible (See Supplemen
11、t 1 for a list of specification sheets.) MILITARY DOD-STD-100 - Ehgineering Drawing Pract.ices MIL-STD-12 9 - Marking of Shipments and Storage MIL-SID- 13 O - Identification Marking of U.S. Military prOpe*Y E 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
12、 IHS-,-,-f MIL-S-I7557D 27 m 777770b OI7IhII I m MIL-STD-143 MIL-STD- 14 7 MIL-STD-202 MIL-STD-46 1 MIL-STD-462 MIL-STD-794 MIL-STD-8 10 MIL-STD-8 38 MIL-SID-8 8 2 MIL-STD-889 MIL-1523 MIL-STD-2164 Ms33537 MS33540 MS33666 MS33668 Standards and Specifications, Order of Palletized Unit Loads Test Meth
13、ods for Electronic and Electrical Component Parts Electromagnetic Emission and Susceptibility Requirements for the Control of Electro- magnetic interference Electromagnetic Interference Characteristics, Measurement of Parts and Equipment, Prccedures for Packaging of Environmental Test Methods and En
14、gineering Guidelines Lubrication of Military EXpipnent System Safety Program Requirements Dissimilar Metals Age Control of Age-Sensitive Elastomeric Materiel (For Aerospace Application) Bwironmental Stress Screening process for Electronic Equipment Insert, Screw Thread, Helical Coil, Coarse and Fine
15、 Thread, Standard Dimensions for Safety Wiring and Cotter Pinning, General Practices for Packing, Preformed, Aeronautical Elastomeric, Range of Sizes Packing, Preformed, Elastomeric, Tube Fitting, Range of Sizes Precedence for the Selection of (Copies of specifications and standards required by the
16、manufacturers in connection with a specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for speci
17、fication sheets or MS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3.1 Specification sheets. The individual item requirements shall be as specif
18、ied herein and in accordance with the applicable specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.1.1 Model specification. If required, a model specification shall be prepared in the format of thi
19、s specification after integrating the requirements fran the applicable specification sheet. contain the approval date, Navy model number, the manufacturers name and address, and a manufacturer designated model specification nimiber. specification number and approval date shall appear on each,page. e
20、nvelope figure specified on the specification sheet and the drawings of 3.5.5 The first page shall The model The 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-shall be included in the model specification in reduced form. 3.2 ualification. Starter
21、s furnished under this specification shall be products which are authorized by the qualifying activity for listing on the applicable qualified products list (QPL) at the time set for opening bids (see 4.5 and 6.3). 3.3 Characteristics. 3.3.1 Performance ratings. The starter shall be capable of produ
22、cing rated torque and output drive speed, as specified on the specification sheet, when supplied with air at the rated inlet conditions, and when operating with the specified remote air control valve. The control value charateristics shall be as specified of the specification sheet. The manufacturer
23、 shall furnish performance data in the model specification on each model starter proposed. be estimated or calculated until the starter has been tested. After that time, performance data shall be based on test results (see 4.4.4.1, 4.5.2 and 4.5.4). The data shall be in the form shown on figures 1 t
24、hrough 5, and may 3.3.2 Functional requirements. The starter shall be designed and constructed to satisfy the functional requirements below and other requirements as specified on the specification sheet. 3.3.2.1 Cutout speed. The starter cutout speed shall be as specified on the specification sheet
25、(see 4.4.4.1 and 4.5.2). 3.3.2.2 Cutout switch. The starter shall be equipped with a cutout switch that will open a normally closed electrical circuit when the starter output drive attains the cutout speed of 3.3.2.1. designed to withstand a surgeocurrent of 2.5 amperes at 28 volts when the ambient
26、temperature is at -65 F. The drive speed shall be measured at the location specified on the specification sheet (see 4.4.4.1, 4.4.5.1, 4.4.6.1 and 4.5.2). The switch shall be The switch shall not be polarity sensitive. 3.3.2.3 Overrunning. When a spline drive and overrunning clutch-type mechanism is
27、 used, the starter shall not be damaged as a result of overrunning for the time specified on the specification sheet. accomplished at the maximum misalignment specified for the engine accessory drive and without lubrication from the engine. The drag in the overrunning clutch shall be minimized to pr
28、event rotation of starter components (see 4.4.4.2 and 4.5.3). The overrunning shall be 3.3.2.4 Ehgagement. Engagement of the starter drive to the engine accessory drive shall be by means of a jaw, overrunning clutch, or other device. shall be accomplished with a minimum of shock and without damage t
29、o the starter or engine. accessory drive for alignment. the end of a starting cycle. jaw-type drives. damage to starter or engine when the starter or the engine drives or both are rotating frm zero to the cutout speed of 3.3.2.1 (see 4.4.4.3). The engagement shall be autanatic upoil initiation of th
30、e airflow and The starter drive shall not be dependent on the engine Disengagement shall be rapid and complete at There shall be a minimm of ratcheting with Reengagement shall be accomplished rapidly and without 4. Provided by IHSNot for ResaleNo reproduction or networking permitted without license
31、from IHS-,-,-VIL-S-37557D 27 777770b 0373633 5 MIL-S-l9557D(AS) 3.3.2.5 Torque limiting device. The starter shall incorporate slip clutch or shear section to prevent damage to both the starter (except for shear section failure) and the engine in the event of excessive starter torque. parts will be r
32、etained within the starter and engine accessory drive. The output drive shall be designed so that if it fails the resulting 3.3.2.5.1 Shear section. The shear section shall be replaceable without disassembly of the starter. incorporate a means of limiting axial movement of the output drive. maximum
33、permissible static shear torque to be transmitted to the engine by the starter output drive under all operating conditions, including engagement and reengagement, shall not exceed the value specified on the specification sheet (see 4.4.4.4.1). A starter output drive shear section shall The 3.3.2.5.2
34、 Slip clutch. When a slip clutch is provided in lieu of a shear section, it shall prevent torque transmission in excess of the breakaway torque specified on the specification sheet (see 4.4.4.4.2). 3.3.2.6 No load operation. The starter shall be capable of operating without damage with the cutout sw
35、itch inoperative and no load on the output drive shaft for at least the time and the speed specified on the specification sheet (see 4.4.4.5). 3.3.2.7 Consecutive cycles. The starter shall be capable of operating without damage for the number of consecutive endurance test cycles specified on the spe
36、cification sheet (see 4.4.4.6). 3.32.8 Sustained motoring. The starter shall be capable of providing and maintaining rated torque and speed, at rated inlet conditions, for the time specified on the specification sheet (see 4.4.4.7). 3.3.2.9 Direction of rotation. The direction of rotation (as viewed
37、 from the anti-drive pad) shall be as specified on the specification sheet and shall be consistent with the direction of rotation stamped on the nameplate. 3.3.2.10 Lubrication. The starter shall be self-lubricating,. including internal splines, when using any of the approved oils or greases allowed
38、 by MIL-ST-838. entrance of engine oil into the starter and the leakage of lubricants from the starter, except as noted below. the endurance test of 4.4.6.1 and the overrunning test of 4.4.4.2 without changing or adding any lubricant. The starter shall be designed and constructed to prevent the The
39、starter shall be capable of completing 3.3.2.10.1 Oil system. one on each side, and one oil drain port. indicate oil quantity level. the starter is filled tooverflow at the fill port, with the starter in the normal attitude. drain the reservoir using the drain connection provided without the use of
40、an external pressurant. servicing shall be determined during the aircraft mockup of 4.4.3. shall be no greater than 15 percent of the reservoir capacity at the completion of the overrunning test of 4.4.4.2. MIL-L-23699 oil shall not be required when the oil temperature is below that The oil reservoi
41、r shall have two oil fill ports, The oil fill ports shall be used to Oil quantity shall be at the proper level when In the normal attitude, it shall be possible to completely Optimum port location(s) with respect to starter Oil loss Starter operation with 5 Provided by IHSNot for ResaleNo reproducti
42、on or networking permitted without license from IHS-,-,-MIL-S-l9557D(AS) corresponding to a kinematic viscosity of 13,000 centistokes. oil is used, the starter shall also be compatible with MIL-L-7808 oil. liquid lubricant shall issue from any lubrications system vent(s) during any mode of operation
43、. 3.3;3 Ehvironmental conditions. Starter performance shall not be If MIL-L-23699 No adversely affected during or after exposure to the following environmental conditions. 3.3.3.1 Temperature range. The starter shall operate satisfactorily, without impairment of function or change in adjustment, thr
44、oughout the ambient temperature range specified on the specification sheet. The starter shall not be damaged when exposured to the temperature range specified on the specification sheet while not operating, and shall operate satisfactorily when returned to the ambient temperature range (see 4.4.5.1)
45、. 3.3.3.2 External surface temperature. The maximum external surface or skin temperature shall not exceed the value specified on the specification sheet during or following any starter operation. insulating blankets may be used to satisfy this requirement (see 4.4.5.1). torque and speed when supplie
46、d with air at the rated inlet conditions from sea level to the maximum rated altitude specified on the specification sheet. addition, the starter shall operate satisfactorily in the overrunning mode from sea level to the maximum overrunning altitude specified on the specification sheet (see 4.4.5.2)
47、. and after exposure to any of the external loads shown on figure 6 without permanent deformation. after exposure to 1.5 times the figure 6 loads, but need not operate satisfactorily thereafter (see 4.4.5.3). External covering or 3.3.3.3 Altitude. The starter shall be capable of operating at rated I
48、n 3.3.3.4 External loads. The starter shall operate satisfactorily during The starter shall also remain attached to the engine 3.3.3.5 Attitude. The starter shall be capable of producing rated torque and speed when operating in any of the attitudes shown in the clear area of figure 7. overrunning mo
49、de in any of the attitudes shown in the clear and shaded areas of figure 7, and for at least 60 seconds at negative iigll and 30 seconds at zero ligll conditions throughout the envelope (see 4.4.5.4). The starter shall also be capable of operate in the 3.3.3.6 Humidity. The starter shall be resistant to malfunctions and deterioration when subject to 95 percent or higher humidity conditions for extended periods (see 4.4.5.5). 3.3.3.7 Rain. The starter shall be capable of operating
