1、Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05M2, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact
2、 information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 3510 INCH-POUND MIL-DTL-23581B(SH) 13 August 2009 SUPERSEDING MIL-T-23581A(SH) 3 August 1992 DETAIL SPECIFICATION TUMBLER, DRYING, LAUN
3、DRY, COMMERICAL (SUBMARINE SERVICE) Reinstated after 13 August 2009 and may be used for new and existing designs and acquisitions. This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Departme
4、nt of Defense. 1. SCOPE 1.1 Scope. This specification covers 16-pound (minimum) capacity commercial laundry drying tumbler machines for use aboard submarines. 1.2 Classification. Drying tumblers are of the following types, as specified (see 6.2). Type I Shock qualified (see 3.7.5) Type II Not shock
5、qualified (see 3.7.5) 1.3 Part or Identifying Number (PIN). PINs to be used for drying tumblers acquired to this specification are created as follows: M 23581 - X Prefix for Military Specification Specification Number Type (see code below) Code Type 1 - Type I: Shock qualified 2 - Type II: Not shock
6、 qualified 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every
7、 effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and h
8、andbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. Provided by IHSNot for ResaleNo reproduction or networking permitte
9、d without license from IHS-,-,-MIL-DTL-23581B(SH) 2 DEPARTMENT OF DEFENSE SPECIFICATION MIL-S-901 - Shock Tests. H.I. (High-Impact) Shipboard Machinery, Equipment, and Systems, Requirements for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Env
10、ironmental and Type II - Internally Excited) MIL-STD-740-1 - Airborne Sound Measurements and Acceptance Criteria of Shipboard Equipment MIL-STD-740-2 - Structureborne Vibratory Acceleration Measurements Acceptance Criteria of Shipboard Equipment MIL-STD-1399-300 - Electric Power, Alternating Current
11、 (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part
12、 of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE) IEEE 45 - Electric Installation on Shipboard. (Copies of this document are available f
13、rom the Institute of Electrical and Electronics Engineers, Inc., 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331 or online at www.ieee.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the referen
14、ces cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspect
15、ion (see 6.3) in accordance with 4.3. 3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements
16、, and promotes economically advantageous life cycle costs. 3.3 Materials. Materials shall be as specified in 3.3.1 through 3.3.6. 3.3.1 Structure. Frame, base, and strength members shall be constructed of malleable iron, ductile iron, or steel and shall be hot dipped galvanized for corrosion protect
17、ion. Gray cast iron or other brittle materials shall not be used for these parts. For Type I drying tumblers, gray cast iron may be used for components other than the frame, base, and strength members provided a machine so equipped meets the shock requirements specified in 3.7.5. 3.3.2 Housing. The
18、housing shall be not less than 18 gauge sheet steel panels. Air guide baffles shall be not less than 22-gauge galvanized sheet steel. 3.3.3 Cylinder. Cylinder shall be galvanized steel sheet of not less than 18-gauge thickness. Provided by IHSNot for ResaleNo reproduction or networking permitted wit
19、hout license from IHS-,-,-MIL-DTL-23581B(SH) 3 3.3.4 Resistance wire. Resistance wire for heating elements shall conform to the following requirements: a. Chemical composition (nominal approximate): Nickel - 76.0 to 79.0 percent Chromium - 19.0 to 21.0 percent Iron - 1.0 (max.) percent Manganese - 2
20、.5 (max.) percent Carbon - 0.25 (max.) percent Silicon - 0.75 to 1.50 (max) percent Sulfur - 0.03 (max) percent b. Mechanical properties: Tensile strength pounds per square inch 100,000 minimum Elongation in 10 inches 15 percent minimum 3.3.5 Insulation. Insulation shall be of the rigid type or of f
21、ibrous glass batt type supported by cover panels. 3.3.6 Restricted materials. The drying tumbler shall be free from asbestos, wood, and cadmium materials. 3.4 Design. 3.4.1 General design. The drying tumbler shall be non-reversing, open end, once through, end loading type arranged so as not to recir
22、culate the heated air. The tumbler shall be electrically heated and provided with a thermostat that can be varied by the operator. The drying tumbler shall meet the following disassembly and reassembly requirements: a. The drying tumbler shall be constructed so that it can be readily disassembled in
23、to sections or parts that can be passed through a 30-inch diameter by 60-inch long cylinder and reassembled with a minimum of effort in the submarine laundry space. b. Cutting of parts by torch or similar means to accomplish disassembly at the site, and reassembly of parts by welding or similar meth
24、od, shall not be permitted. 3.4.2 Capacity. The machine shall accommodate or hold a load of not less than 16 pounds dry weight minimum capacity preload cotton clothing (see 6.2). 3.5 Construction. 3.5.1 Metal joints. Rivets, bolts, screws, nuts, and washers shall be of steel, except when brass or co
25、rrosion-resistant steel is fastened, in which case they shall be of brass or corrosion-resistant steel. Where dissimilar metals are fastened, rivets, bolts, screws, nuts, and washers shall be galvanically compatible with materials being joined. Electrodes or welding rods used for welding parts shall
26、 deposit material similar to the part base metal. Nuts subject to shock or vibration shall be self-locking. 3.6 Details of units or parts. 3.6.1 Frame. When assembled, the frame shall provide a rigid and durable support for the housing, cylinder, heating coils, fan, motor, and driving mechanism. 3.6
27、.2 Housing. The entire unit shall be enclosed in a housing of sheet steel panels. Except for the air inlet, air outlet, door opening and access plates, the housing enclosing the cylinder shall be sealed to prevent air leakage. When closed or in place, door and access plates shall be sealed to preven
28、t air leakage or disruption of air flow when the drying tumbler is in operation. Doors or access plates shall be provided for maintaining machinery and cleaning the machine. The upper and lower front panels of the drying tumbler shall be constructed and secured so that they are readily removable wit
29、hout the use of special tools or the need to disconnect wiring from component parts other than parts with plug type connectors, to facilitate lint removal between the cylinder and the housing and from the heating elements. Provided by IHSNot for ResaleNo reproduction or networking permitted without
30、license from IHS-,-,-MIL-DTL-23581B(SH) 4 3.6.3 Door. A loading door concentric with the cylinder opening shall be provided at the front of the housing. The door shall be insulated and configured to act as a baffle for retaining the load within the cylinder. The door shall be hinged and fitted with
31、a latching handle and an electrical interlock to prevent operation of the cylinder when the door is not latched. 3.6.4 Cylinder. The cylinder shall be circular in shape and formed from perforated galvanized steel sheet. Perforations shall be staggered and not larger than 1132-inch diameter. Perforat
32、ions in the cylinder shall be free from burrs or imperfections that will damage clothing. The back of the cylinder shall be solid and the front end of the cylinder shall have a circular opening to match the recessed section of door in housing. The cylinder shall have an approximate diameter of 24 in
33、ches and a length of 28 inches. Cylinder shall be driven through a steel gudgeon welded to a steel transmitter, which in turn is securely bolted to the rear cylinder head. The cylinder shall be fitted with lifting ribs of adequate number and size to properly tumble the clothing. Through tie-rods sha
34、ll be installed within the lifting ribs to increase the rigidity of the cylinder. 3.6.5 Transmitter. The transmitter shall be made of steel, shall have spiders of sufficient number and length to support the cylinder under full load conditions, and shall be securely bolted to back sheet of cylinder a
35、nd welded to the gudgeon. 3.6.6 Gudgeon. The gudgeon shall be made of steel of suitable strength and hardness to ensure safe and durable operation under full load conditions. The gudgeon shall be machined for proper fit with bearing sleeves at back of machine. 3.6.7 Cylinder bearings. The cylinder s
36、hall be supported at the rear by two widely spaced, heavy duty, ball or roller bearings. The bearings shall be of a readily renewable type and of sufficient capacity and durability to provide vibrationless rotation of the cylinder under full load conditions for not less than 5000 hours. 3.6.8 Fan. A
37、 fan of sufficient capacity to meet the drying requirements of 3.7.1 shall be provided. 3.6.9 Air ducts. Air ducts shall be sized to meet the requirements of 3.7.1. 3.6.10 Exhaust. An exhaust duct opening of ample size shall be provided for exhausting air after passage through the tumbler. The openi
38、ng shall be provided with suitable fittings for connecting an exhaust air duct. The exhaust air flow capacity shall be 355 cubic feet per minute exhausted through a 6-inch diameter vent duct connection. The exhaust duct shall be located on the back left side of the machine, below center, when facing
39、 the back of the drying tumbler. 3.6.11 Drive adjustments. A means shall be provided for adjusting belts or chain drives. 3.6.12 Insulation. Except for external surfaces touched by the operator to operate the drying tumbler (e.g., door handle, control panel), external surfaces shall be insulated fro
40、m the internal heat source so that not more than 15 percent of the outer housing surface exceeds a temperature of 35 F above the ambient air temperature during the test (see 4.3.3.10). External surfaces touched by the operator to operate the drying tumbler shall not exceed 35 F above the ambient air
41、 temperature during the test (see 4.3.3.10). Insulation shall be encased to hold the insulation in place and to prevent settling, crumbling, or flaking within the housing. 3.6.13 Size. Excluding appendages such as the door handle, knobs, etc., the overall maximum dimensions shall not exceed 26 inche
42、s wide by 40 inches deep by 40 inches high. 3.6.14 Electrical requirements. Unless otherwise specified in the contract or order, all electrical equipment shall conform to the requirements in IEEE 45 for electrical shipboard installation. Electrical equipment shall be designed for operation on a Type
43、 I electrical system as required in MIL-STD-1399-300. The control panel shall be dripproof. Pushbuttons and switches shall be arranged for safe and convenient operation. Wiring shall be arranged, protected, or insulated so that temperatures within the tumbler will not result in deterioration of the
44、insulation and cause short circuits to occur. The machine shall operate on 440-volt, 3-phase, 60 Hertz electrical service. Electrical load shall be not greater than 19.5 kilowatts. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23581B(SH) 5
45、3.6.14.1 Heating unit. Heating unit shall be electric and of sufficient capacity to durably and efficiently accomplish the drying requirements of 3.7.1. Heating elements shall be of the enclosed conduction type securely fastened in place to withstand vibration. The elements shall be embedded in a re
46、fractory material, preferably magnesium oxide. The resistance wire and the refractory material shall be enclosed in a seamless tubular corrosion-resisting metal sheath which shall firmly hold the wire and refractory material in place. The sheath material may be a nickel-chromium-iron alloy. The refr
47、actory material shall be tightly packed to prevent the wire from grounding to the sheath when subjected to bending, forming, shock, or vibration at points where connections are made. A length shall be left unheated to prevent damage to the connections and wire by overheating. The ends of the heating
48、 elements shall be effectively sealed and protected to prevent the entrance of moisture. Connections to the elements shall have locknuts and lockwashers or, if plug-in type elements are used, they shall be firmly secured in such a manner that they will not break loose because of heat expansion and c
49、ontraction. 3.6.14.1.1 Heater voltage. Unless otherwise specified (see 6.2), heater elements shall be suitable for operation on 440-volt, 3-phase, 60 Hertz alternating current. Elements capable of operation on 220 volts, are permissible if two elements of equal resistance are wired in series. The use of a transformer to obtain necessary voltage shall be avoided. Heater elements shall be balanced on all three phases at rated voltage; watts input shall be within 5
