1、Comments, suggestions, or questions on this document should be addressed to U.S. Army Tank-automotive and Armaments Command, ATTN: RDTA-EN/STND/TRANS, MS# 268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or emailed to DAMI_STANDARDIZATIONconus.army.mil. Since contact information can change, you may
2、want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 2940 INCH-POUND MIL-PRF-62284B(AT) 09 November 2009 SUPERSEDING MIL-PRF-62284A(AT) 18 December 1997 PERFORMANCE SPECIFICATION BLOWER ASSEMBLY, AIR CLEANER This specific
3、ation is approved for use by the U.S. Army Tank-automotive and Armaments Command, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a 1/10 horsepower (hp) continuous duty motor directly coupled
4、 to a 60 standard cubic feet per minute (stdft3/min) blower, operating from an 18 to 30 Volts direct current (Vdc) power source. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents
5、cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirement documents cited in sections 3 and 4 of this spe
6、cification, whether or not they are listed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62284B(AT) 2 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a p
7、art of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS DEPARTM
8、ENT OF DEFENSE MIL-DTL-53039 - Coating, Aliphatic Polyurethane, Single Component, Chemical Agent Resistant MIL-DTL-64159 - Coating, Water Dispersible Aliphatic Polyurethane, Chemical Agent Resistant STANDARDS DEPARTMENT OF DEFENSE MIL-STD-461 - Requirements for the Control of Electromagnetic Interfe
9、rence Characteristics of Subsystems and Equipment MIL-STD-810 - Environmental Test Methods and Engineering Guidelines (see 4.2.1). (Unless otherwise indicated, copies of the above specifications and standards are available from Document Automation and Production Service, Building 4/D, 700 Robbins Av
10、enue, Philadelphia, PA 19111-5094 or website: http:/assist.daps.dla.mil/quicksearch/.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise spec
11、ified, the issues are those cited in the solicitation. DRAWINGS ARMY 10905010 - Blower, Air Cleaner (Interface). 12251905 - Strap, Blower Motor (Interface). 12251912 - Support, Blower Motor (Interface). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
12、-MIL-PRF-62284B(AT) 3 (Copies of U.S. Army drawings are available from the U.S. Army Tank-automotive and Armaments Command, ATTN: RDTA-EN, 6501 E 11 Mile Road, Warren, MI 48397-5000.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein
13、. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AIR
14、 MOVEMENT AND CONTROL ASSOCIATION (AMCA) Bulletin 210 - Method of Testing Fans (DoD Adopted). (Application for copies should be addressed to the Air Movement and Control Association, 30 W. University Drive, Arlington Heights, IL 60004.) AMERICAN SOCIETY OF HEATING, REFRIGERATION AND AIR CONDITIONING
15、 ENGINEERS (ASHRAE) Standard 51 - Method of Testing Fans for Rating (DoD Adopted). (Application for copies should be addressed to the American Society of Heating, Refrigeration and Air Conditioning Engineers, 1791 Tullie Circle NE, Atlanta, GA 30329.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM
16、) ASTM B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus (DoD Adopted). ASTM D610 - Standard Test Method for Evaluating Degree of Rusting on Painted Steel Surfaces (DoD Adopted). (Copies of ASTM publications may be obtained from the American Society for Testing and Materials, 100 Bar
17、r Harbor Drive, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a
18、 specific exemption has been obtained. 3. REQUIREMENTS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62284B(AT) 4 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.1.1.
19、 3.2 Design, materials, and manufacturing processes. Unless otherwise specified (see 6.2), the design, materials, and manufacturing process selection shall be the prerogative of the contractor as long as all articles submitted to the Government fully meet the operating, interface, ownership and supp
20、ort, and operating environment requirements specified. Asbestos and Cadmium materials shall not be used in any form in any part of the blower assembly. No item, part or assembly shall contain radioactive materials in which the specific activity is greater than 0.002 microcuries per gram or activity
21、per item equals or exceeds 0.01 microcuries. 3.2.1 Fungistatic materials. All nonmetallic materials shall be inherently fungistatic or treated to resist fungus growth except when used for components of potted or otherwise moisture sealed assemblies. 3.2.2 Dissimilar metals. Dissimilar metals shall n
22、ot be used in intimate contact unless suitably protected against electrolytic corrosion. This restriction does not apply to continuous plating, cast, inserts, or potted assemblies. 3.2.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable
23、materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Operating requirements. The blower assembly shall meet the following performance requirements
24、: 3.3.1 Operating characteristics. The blower shall have the following operating characteristics: a. Rated voltage: 24 0.5 Vdc. b. Blower load current: 8 amperes (A) (max.) with 0 inch (in.) of water at blower inlet and outlet. c. Blower load speed: 11,500 revolutions per minute (rpm) 10 percent (%)
25、 with 0 in. of water at blower inlet and outlet. 3.3.2 Air flow. The blower shall meet the minimum airflow requirements of figure 1. 3.3.3 Electrical characteristics. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62284B(AT) 5 3.3.3.1 Dielec
26、tric strength. There shall be no damage to the dielectric material and insulation sufficient to cause failure of the blower when the blower is subjected to 500 Volts root mean square (V rms) at 60 Hertz (Hz). 3.3.3.2 Insulation resistance. The insulation resistance of the motor windings when used sh
27、all be not less than 50 megohms when tested at 500 Vdc. 3.3.3.3 Transient voltage. Transients are the changing conditions of a characteristic. These usually go beyond the steady-state limits and return to and remain within the steady-state limits within a specified time period. The transient may tak
28、e the form of either a surge or a spike (see figures 2 and 3). The blower shall not be damaged when subjected to a source voltage with reverse polarity. 3.3.3.3.1 Surge. A surge is a variation from the controlled steady-state level of a characteristic, resulting from the inherent regulation of the e
29、lectric power supply system and remedial action by the regulator, except for battery only operation. Surge may also occur due to the application of loads in the battery only condition. 3.3.3.3.2 Spike. A spike is a high frequency oscillatory variation from the controlled steady-state level of a char
30、acteristic. It results from very high frequency currents of complex wave form produced when reactive loads are switched. An individual spike generally lasts less than 50 micro-seconds by may take up to one millisecond to decay to the steady-state level. 3.3.3.4 Starting current. The blower starting
31、current transient shall not exceed 60 A and shall drop to 10 A, or less, within 1 second after application of input voltage. The blower shall meet these starting requirements when operating from a 24 0.5 Vdc power source which has an impedance of 0.13 0.01 ohms. 3.4 Interface requirements. 3.4.1 Ove
32、rall envelope and interfaces. The blower assembly shall fit into the air cleaner system of the M60 series tracked vehicles. The envelope dimensions and the electrical and mechanical interface locations and dimensions shall conform to Drawings 10905010, 12251905, and 12251912. 3.4.2 Weight. The blowe
33、r assembly, without mounting hardware, shall have a maximum weight of 8 pounds (lb). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62284B(AT) 6 3.4.3 Electromagnetic interference. The blower shall meet the requirements for radiated emission
34、s in accordance with figures 4 and 5, and conducted emissions in accordance with figures 6, 7, and 8. 3.5 Ownership and support requirements. The blower assembly shall meet the following logistics requirements. 3.5.1 Endurance. The blower shall show no performance degradation after 800 hours of oper
35、ation in accordance with the endurance life cycle shown in figure 9 at the input voltages in figure 10, and shall withstand random vibration with acceleration level of 0.003 square gravity per Hertz (g2/Hz) 2 decibels (dB) between the frequencies of 10 and 500 Hz. 3.5.2 Safety. The air cleaner shall
36、 be safe to operate, and shall not subject personnel to injuries from rotating parts, burrs, or sharp edges, electrocution, etc. 3.5.3 Interchangeability. All similar parts, including repair parts, of the blower assembly furnished on the same order or built to the same drawings, shall be strictly in
37、terchangeable without the necessity of further machining, selective assembly or hand fitting of any kind. 3.5.4 Marking. Marking shall include, as a minimum, the following information permanently marked, and clearly visible on the outer surface of the assembly: a. Nomenclature “BLOWER ASSEMBLY, AIR
38、CLEANER”. b. Manufacturers identification. c. When required, serial numbers shall be defined (see 6.2). d. Military part number. e. Date of manufacture. f. Contract number. g. Symbol “US”. 3.6 Operating environment requirements. The blower assembly shall operate under the following environmental con
39、ditions, without degradation in performance. 3.6.1 Temperature. The blower shall meet the performance requirements specified herein at any temperature within the range of 185 degrees Fahrenheit (F) to minus (-) 65F. The blower shall not be damaged by storage conditions ranging from -65F to 185F. 3.6
40、.2 Vibration. The blower shall be capable of withstanding the vibration profile of figure 11 for a period of 120 minutes (including up to 4 resonance dwells of 20 minutes each) in each of the three mutually perpendicular axes as shown in figure 12. Provided by IHSNot for ResaleNo reproduction or net
41、working permitted without license from IHS-,-,-MIL-PRF-62284B(AT) 7 3.6.3 Shock (non-operating). 3.6.3.1 Basic intensity. The blower shall be capable of withstanding exposure to three half sine wave shock pulses of 40 4 gravity units (gs) for a duration of 18 3 milliseconds (ms) applied in both dire
42、ctions along three mutually perpendicular axes as shown in figure 12. 3.6.3.2 High intensity. The blower shall be capable of withstanding three half sine wave shock pulses of 100 10 gs for a duration of 1.0 0.2 ms applied in both directions along the three mutually perpendicular axes. 3.6.4 Waterpro
43、ofness. The assembly shall be capable of withstanding 6 pounds per square inch differential (psid) air pressure developed such that the blower internal air pressure exceeds the external pressure while submerged in clear water for 5 minutes without evidence of leakage. 3.6.5 Dust. The assembly shall
44、be capable of operating as specified herein during the coarse dust test for 50 hours. The dust particle size and distribution by weight shall be as specified in table I. TABLE I. Coarse dust test requirements. Dust size (microns) Percent dust of total weight 0 - 5 12 2 5 - 10 12 3 10 - 20 14 3 20 -
45、40 23 3 40 - 80 30 3 80 - 200 9 3 3.6.6 Humidity. The assembly shall meet the requirements specified herein after exposure to humidity conditions of 100% relative humidity. 3.6.7 Corrosion. The assembly shall be capable of operating as specified herein after exposure to a 5% sodium chloride atomized
46、 spray for 48 hours minimum. 3.6.8 Protective finish and color. Unless otherwise specified (see 6.2), the blower assembly shall be cleaned, pretreated and primed in accordance with the manufacturers standard practice (see 6.5). The topcoat color shall be forest green. 4. VERIFICATION Provided by IHS
47、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62284B(AT) 8 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.1.1). b. Conformance inspection (see 4.1.2). 4.1.1 Fir
48、st article inspection. First article inspection shall be performed on the first six assemblies selected from the first ten assemblies produced (or whenever else the contract specifies) when a first article sample is required (see 3.1). This inspection shall include the verifications listed in table
49、II. 4.1.2 Conformance inspection. Conformance inspection shall include those examinations and tests from table II as defined in the contract. 4.2 Verification methods. Acceptable verification methods included in this section are visual inspection, and measurement, sample tests, full-scale demonstration tests, simulation, modeling, engineering evalu
