1、MIL-P-17840C(SH)10 March 1986SUPERSEDINGMIL-P-17840B(SHIPS)28 December 1962(See 6.7)MILITARY SPECIFICATIONPUMPS, CENTRIFUGAL, CLOSE-COUPLED, NAVY STANDARD(FOR SURFACE SHIP APPLICATION)This specification is approved for use within the Naval Sea SystemsCommand, Department of the Navy, and is available
2、 for use by allDepartments and Agencies of the Department of Defense.1. SCOPE1.1 Scope. This specification covers electric motor driven. Navy standard,close-coupled , single-stage, centrifugal pumps. .1.1.1 The Navy standard pump numbers under this specification have theletter “C” added (for example
3、, 9C) to distinguish the pumps covered hereinfrom those under the previous editions of this specification.2. APPLICABLE DOCUMENTS2.1 Government documents.2.1.1 Specifications and standards. The following specifications andstandards form a part of this specification to the extent specified herein.Unl
4、ess otherwise specified, the issues of these documents shall be thoselisted in the issue of the Department of Defense Index of Specifications andStandards (DoDISS) and supplement thereto, cited in the solicitation.SPECIFICATIONSFEDERALFF-B-171 - Bearings, Ball, Annular (General Purpose).HH-P-46 - Pa
5、cking; Asbestos, Sheet, Compressed.QQ-C-390 - Copper Alloy Castings (Including Cast Bar).QQ-N-281 - Nickel-Copper Alloy Bar, Rod, Plate, Sheet, Strip,Wire, Forgings, and Structural and Special ShapedSections.Beneficial comments (recommendations, additions, deletions) and any pertinentdata which may
6、be of use in improving this document should be addressed to:Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy,Washington, DC 20362-5101 by using the self-addressed Standardization DocumentImprovement Proposal (DD Form 1426) appearing at the end of this document orby letter.AMSC
7、N/A FSC 4320DISTRIBUTION STATEMENT A Approved for public release; distribution unlimitedProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17840C(SH) FEDERAL (Continued)QQ-N-286 -QQ-N-288 -TT-P-645 -GGG-E-950 -GGG-P-781 -MILITARYMIL-S-901 -MIL-S-1
8、222 -MIL-P-15024 -MIL-P-15024/5 -MIL-M-15071MIL-E-15090MIL-P-15137DOD-P-15328MIL-C-15345MIL-C-15726MIL-T-16420MIL-P-16789MIL-M-17059MIL-M-17060MIL-M-17413MIL-M-17556MIL-C-20159MIL-P-24377DOD-G-24508MIL-S-46163STANDARDSFEDERALFED-STD-H28FED-STD-H28/2 -Nickel-Copper-Aluminum Alloy, Wrought (UNS N05500
9、).Nickel-Copper Alloy and Nickel-Copper-SiliconAlloy Castings.Primer, Paint, Zinc Chromate, Alkyd Type.Extractor, Stuffing Box and Pump Packing (andTamper); and Extractor, Lantern Gland-Puller, Mechanical Puller Attachment, Mechanical,and Puller Set, Mechanical.Shock Tests, H.I. (High-Impact); Shipb
10、oard Machin-ery, Equipment and Systems, Requirements for.Studs, Bolts, Hex Cap Screws, and Nuts.Plates, Tags and Bands for Identification ofEquipment.Plates, Identification.Manuals, Technical, Equipment and Systems ContentRequirements for.Enamel, Equipment, Light-Gray (Formula No. 111).Provisioning
11、Technical Documentation for RepairParts for Electrical and Mechanical Equipment(Naval Shipboard Use).Primer (Wash), Pretreatment (Formula No. 117 forMetals). (Metric)Castings, Nonferrous, Centrifugal-Copper-Nickel Alloy, Rod, Flat products (FlatWire , Strip, Sheet, Bar, and Plate) and Forgings.Tube,
12、 Copper-Nickel Alloy, Seamless and Welded(Copper Alloy Numbers 715 and 706).Packaging of Pumps, Including Prime Movers andAssociated Repair Parts.Motors, 60-Cycle, Alternating-Current, FractionalH.P. (Shipboard Use).Motors , 60-Hertz, Alternating Current, Integral-Horsepower, Shipboard Use.Motors, D
13、irect Current, Integral H.P., NavalShipboard.Motor, Direct-Current, Fractional HP (Shipboard Use).Copper-Nickel Alloy Castings (UNS No. C96200and C96400).Packing Material, Asbestos, Braided, Impregnated withPTFE (Polytetrafluoroethylene), Surface Lubricated.Grease, High Performance, Multi-Purpose. (
14、Metric)Sealing, Lubricating, and Wicking Compounds:Thread-Locking, Anaerobic, Single-Component.Screw-Thread Standards for Federal Services.Screw-Thread Standards for Federal ServicesSection 2 Unified Inch Screw Threads - UN andUNR Thread Forms.2Provided by IHSNot for ResaleNo reproduction or network
15、ing permitted without license from IHS-,-,-MIL-P-17840C(SH)MILITARYMIL-STD-167-1 -MIL-STD-278 -MIL-STD-740 -MIL-STD-777 -MIL-STD-1399, -Section 301DOD-STD-2147 -MS16142MS18229Mechanical Vibrations of Shipboard Equipment(Type I - Environmental and Type 11 - InternallyExcited).Fabrication Welding and
16、Inspection; and CastingInspection and Repair for Machinery, Piping andPressure Vessels in Ships of the United StatesNavy.Airborne and Structureborne Noise Measurementsand Acceptance Criteria of Shipboard Equipment.Schedule of Piping, Valves, Fittings, and Associated Piping Components for Naval Surfa
17、ce Ships.Interface Standard for Shipboard Systems ShipMotion and Attitude.Technical Repair Standards (TRS); Hull, Mechanicaland Electrical (HM however, pumps shall be capable of operation and mountingin a vertical position with the motor above the pump. Pumps shall be suitablefor installation either
18、 fore and aft or athwartship (see 6.2.1).3.2.6.2 Dimension. Pumps shall have mounting dimensions and location ofpiping connections as shown on figure 1.3.2.6.3 Mounting brackets. Mounting brackets shall contain a drip packetfor the collection of leakage from the stuffing box. The size of the tappedh
19、oles shall be as shown on figure 1. Tapped holes shall be tapered thread.Mounting brackets shall be separate from the casings and shall” not include thepump stuffing box or any portion of the pressure boundary.3.2.6.4 Motors shall be assembled to pumps at the pump manufacturersplant.3.2.7 Bearings.3
20、.2.7.1 Size of radial and thrust ball bearings. The size of the radialand thrust ball bearings for each size motor frame shall be as shown on figures2 and 3. The pump end bearing shall be fixed in the housing and shall carrythe pump thrust load. However, on low noise level units, the motor end beari
21、ngmay carry the thrust load. Bearings shall be selected for a B-10 life of 10,000hours calculated in accordance with FF-B-171. Calculations shall be made forthe design point and also for the highest loading conditions over the operatingrange and shall consider both thrust and radial hydraulic loads,
22、 gravity loads,and bearing preloads. Hydraulic thrust due to the use of single inlet impellerswithout balancing rings shall be computed in accordance with the followingformula:T= P(A1 - A0) + 0.05 P(A2-A1)Where:T = Maximum unbalanced thrust in pounds.P = Pressure in pounds per square inch (lb/inz) a
23、t shutoff.A2 = Area of impeller at radius R2 in square inches (see figure 4).A1 = Area of impeller to outside of impeller wearing ring, radius R1in square inches.A0 = Area in square inches to outside of shaft sleeve, radius R0.3.2.7.2 When the axial thrust load calculated by the formula of 3.2.7.1ex
24、ceeds the permissible thrust loads shown in table I, special thrust balancingdevices shall be added.7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17840C(SH)TABLE I. Permission thrust loads.Bearingsize Revolutions per minute (r/rein)305306307
25、3083093103123131150-56060070080017502152802354004705005806702800-37540047053035001602152553003503604254953.2.7.3 Anti-friction bearings shall be type 111, class 2, or type 120 inaccordance with FF-B-171. The sizes used for the various frames shall be asshown on figures 3 and 5.3.2.7.4 For installati
26、ons utilizing the pump end bearing as the thrustbearing, a bearing preload spring shall be provided and shall be installedagainst the outer edge of the outer ring of the front end bearing. Forinstallations using the front end bearing as the thrust bearing, a bearingpreload spring shall be installed
27、against the inner edge of the outer ring ofthe pump end bearing.3.2.8 Lubrication.3.2.8.1 The lubrication of rolling contact bearings shall be in accordancewith FF-B-171.3.2.8.2 The rolling contact bearing lubrication method shall preventbearing failure resulting from over-greasing. Bearing relubric
28、ation proceduresshall be accomplished with the unit secured.3.2.8.3 Grease lubricants shall be in accordance with DOD-G-24508. Thedesign shall be such that any qualified grease under DOD-G-24508 can be usedinterchangeably with any other qualified product to the same specification.Bearings shall be c
29、apable of being relubricated without removing the bearingsand shall not require frequent lubrication if the pump is not operated over anextended period of time.3.2.8.4 Thrust bearing housings shall be so designed that the thrustbearing will be adequately lubricated immediately when the shaft starts
30、to turn.This shall be accomplished by properly locating lubricant supply and drainfittings and by adequate sealing of the bearing housings so that, regardless oflength of time the units are idle, an adequate supply of lubricant will remainin the bearing housings.8Provided by IHSNot for ResaleNo repr
31、oduction or networking permitted without license from IHS-,-,-MIL-P-17840C(SH)3.2.9 Packing and gasket. Packing and gaskets shall be in accordancewith Drawing B-153. Packing shall be of the teflon impregnated type in accord-ance with MIL-P-24377. Gasket compression and tolerances shall not effectbea
32、ring bushing or wearing ring fits to an extent that will adversely affectreliability and performance. Pump casing joints shall be made up using com-pressed asbestos sheet gaskets or 0-rings when approved by the design reviewagency.3.2.10 Threaded fasterners. Threaded parts, such as bolts, studs, and
33、nuts, shall conform to FED-ST-H28, FED-STD-H28/2, and MIL-S-1222. The use oftap-bolts or cap-screws is prohibited unless explicitly discussed and justifiedin a submittal to the design review agency and approved by the design reviewagency and where the use of through bolts or studs is impractical. Fo
34、rtemperatures under 250 degrees Fahrenheit (“F), the setting end of studs shallbe a class 2 fit or preferably a class 3 fit, both with locking resin inaccordance with MIL-S-46163, type I, grade K. The nut end shall be a class 3fit.3.2.10.1 The length of minimum stud engagement shall be computed assp
35、ecified in FED-STD-H28.3.2.10.2 Unless otherwise specified (see 6.2.1), threaded fasteners ofnormally stocked lengths shall be used. Male threads on threaded fasteners,after being installed and tightened, shall protrude at least one thread beyondthe top of the nut or plastic lccking element. Excessi
36、ve protrusion shall beavoided , particularly where necessary clearances, accessibility, and safety areimportant. Where practicable, the number of threads protruding shall not exceedfive; however, in no case shall thread protrusion exceed 10 threads. Washersshall not be used for the sole purpose of l
37、essening thread protrusion.3.2.11 Piping root connections. Root connections for attaching pipesshall be in accordance with Drawing B-214.3.2.11.1 Pumps shall be fitted with flanged connections conforming toMIL-STD-777 for suction and discharge pressure gauges or MS connections inaccordance with MS16
38、142, as specified (see 6.2.1). All pump flanges shall havea face circular lay finish as detailed in the applicable general note ofMIL-STD-777.3.2.11.2 Pressure gauges, when provided with the units, shall be mountedin accordance with Drawing 810-1385850. Gauges shall be positioned for access-ibility
39、of reading and maintenance. Gauges shall be secured on the parentequipment in such a manner as to prevent vibration, breakage, and disconnection.3.2.12 Welding. Welding and welding repair shall be in accordance withMIL-STD-278. Brazed joints shall not be used.3.2.13 Mercury prohibition. When specifi
40、ed (see 6.2.1), pumps, drivers,and auxiliary parts furnished by the pump contractor shall be free of mercurycontamination and free of functional mercury. The manufacturer shall certifythat the pumps, drivers, and auxiliary parts, when shipped, are free frommercury contamination (see 6.2.2).9Provided
41、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17840C(SH)3.2.14 Motors.3.2.14.1 The standardized frame numbers for the various ratings of close-coupled pump motors shall be as specified in tables II and III. Frame flangeand shaft extension dimensions
42、shall be as shown on figures 2, 3, and 5, asapplicable. The mounting bracket between the motor and pump volute shall befurnished by the pump contractor.3.2.14.2 Alternating current (ac) motors. Ac motors shall be in accordancewith MIL-M-17059 for fractional horsepower (hp) or MIL-M-17060 for integra
43、l hp,except as otherwise specified herein, and shall conform to the followingclassification requirements:Service AAmbient temperature 50 degrees Celsius (C)Duty ContinuousType Squirrel-cage inductionDesign (for integral hp motors)BearingsInsulationTemperature riseNumber of phasesFrequencyVoltageEncl
44、osureBBall (see figures 2 and 3)Class B, F, H, or N70C in 50C ambient360 Hertz (Hz)440 voltsTotally enclosed or totallyenclosed fan-cooled (openmotors not permitted)3.2.14.3 Direct current (de) motors.3.2.14.3.1 Dc motors shall be in accordance with MIL-M-17413 for inte-gral hp, or MIL-M-17556 for f
45、ractional hp, except as otherwise specified herein,and shall conform to the following classification requirements:ServiceAmbient temperatureDutyVoltageWindingBearingsInsulationTemperature riseEnclosureA50CContinuous115 or 230 volts as specified(see 6.2.1)Shunt or shunt stabilizedBall (see figures 2
46、and 5)Class B and H (no siliconematerials)70C in 50C ambientTotally enclosed or totallyenclosed fan-cooled (openmotors not permitted)3.2.14.3.2 Speed tolerance. The full load speed of dc constant speedmotors with full FIELD, at ambient temperature (40C) shall be not less than 85percent of the specif
47、ied speed for integral and fractional hp motors. Integral10Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17840C(SH)hp motors at full load and at operating temperature shall be not less than92-1/2 percent nor more than 107-1/2 percent of the s
48、pecified speed: Fractionalhp motors at full load and at operating temperature shall be not less than 90percent nor more than 110 percent of the specified speed.TABLE II. Ac motors 50C ambient, class B, F, H, or N insulation.with 70temperature rise (see 3.2.14.2).See footnotes at end of table.11Provi
49、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17840C(SH)Table II. Ac motor 50C ambient, class B, F, H, or N insulationwith 70C temperature- rise (see 3.2.14.2). - ContinuedAJ and AK dimensions are shown on figure 3.These frame sizes are larger than those shown in MIL-M-17060 to accommodatethe larger bearing, shaft, and mounting dimensions invoked by thi
