1、 MIL-PRF-bZ331A W 9Ob 2045335 455 I INCH-POUND I MIL-PRF-6233 lA(AT) 15 August 1997 SUPERSEDING 30 March 1984 MTL-P-6233 l(AT) PERFORMANCE SPECIFICATION PUMP ASSEMBLY, BILGE, ELECTRIC MOTOR DRIVEN, DIRECT CURRENT This specification is approved for use by U.S. Army Tank-automotive and Armaments Comma
2、nd, 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 the performance and design requirements for an electric motor driven pump assembly which evacuates water from M60 series tanks. 2. APPLICAB
3、LE 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 cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to
4、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 specification, whether or not they are listed. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be
5、of use in improving this document should be addressed to: U. S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-E/BLUE, Warren, MI 48397-5000, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. AMSC N/A FSC 4320 D
6、ISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling ServicesMIL-PRF-623 3 1 A(AT) 2.2 Government documents. 2.2.1 Specifications. standards. and handbooks. The following specifications, standards, and handbooks form a part of this documen
7、t 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). STANDARDS DEPARTMENT OF DEFENSE MIL-STD-4
8、62 - Electromagnetic Interference Characteristics MIL-STD-810 Measurements of - Environmental Test Methods and Engineering Guidelines. (Unless otherwise indicated, copies of the above specifications, standards, and handbooks are available from the Standardization Document Order Desk, 700 Robbins Ave
9、nue, Building 4D, Philadelphia, PA 191 11-5094.) 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 specified, the issues are those cited in t
10、he solicitation. DRAWINGS ARMY 7059833 - Bilge Pump Assembly (Interface). (Copies of these drawings are available from the U. S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-E/BLUE, Warren, MI 48397-5000.) 2.3 Non-Government publications. The following documents form a part of this doc
11、ument to the extent specified herein. 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 cite
12、d in the solicitation (see 6.2). 2 Licensed by Information Handling ServicesMIL-PRF-6233 lA(AT) AMERICAN NATIONAL STANDARD INSTITUTE (ANSI) ANSUASQC 21.4 - Sampling Procedures and Tables for Inspection by Attributes OD Adopted). (Application for copies should be addressed to American National Standa
13、rd Institute (ANSI), 11 West 42nd Street, New York, NY 10036.) NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA) MG1-4.21 - Method of Measuring the Motor Vibration (Dynamic Balance) OD Adopted). (Application for copies should be addressed to the National Electrical Manufacturers Association, 2101
14、 L Street, NW, Washington, DC 20037.) 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 specific exe
15、mption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified, a sample shall be subjected to first article inspection in accordance with 4.3 (see 6.2). 3.2 Materials. Materials shall be in accordance with the manufacturers materials specifications for pumps. Materials shall be capable
16、 of meeting all operational and environmental requirements specified herein and shall be fkee of defects which adversely affect performance or serviceability of the finished product. Asbestos and cadmium materials shall not be used in any form in any part of the pump. No item, part or assembly shall
17、 contain radioactive materials in which the specific activity is greater than 0.002 microcuries per gram or activity per item equals or exceeds 0.01 microcuries (see 4.5.1). 3.2.1 Metals and finishes. Exposed functional parts shall be fabricated from suitable corrosion resistant material or treated
18、to prevent corrosion. Exposed nonfunctional parts shall be painted white in accordance with the manufacturers standard (see 4.5.1). 3.2.2 Fungistatic materials. All non-metallic materials shall be inherently fungistatic or treated to resist fungus growth except when used for components of potted or
19、otherwise moisture sealed assemblies (see 4.5.1). 3 Licensed by Information Handling Services MIL-PRF-62331A 9999906 2045338 164 MIL-PRF-623 3 1 A(AT) 3 2.3 Recvcled. recovered. or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to th
20、e maximum extent possible provided that the materials meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Design and construction. Pump assemblies shall conform to the envelope dimension, inletloutlet port locations and dimensio
21、ns, and the electrical and mounting interfaces as shown in drawing 7059833 (see 4.5.1). 3.3.1 Interchangeability. All similar parts including repair parts of the motor assembly funriished on the same order or built to the same drawings shall be completely interchangeable without further machining se
22、lective assembly or hand fitting of any kind (see 4.5.1). 3.4 Performance. Unless otherwise specified, the pump assembly shall meet the performance requirements under the following conditions: a. Air temperature 73 i 18 degrees Fahrenheit (“F) b. Pressure 28.5 (+2.0, -4.5) inches of mercury (Hg) c.
23、Humidity 50 30 percent (“A) d. Voltage 27.5 ? 0.5 volts (V) direct current (dc) 3.4.1 Voltage range. The pump assembly shall operate between 18 and 30 Vdc. The output at 18 Vdc shall be not less than 30 gallons per minute (gdmin) minimum at 12 foot (fi) total discharge head (TDH) and at 30 Vdc not l
24、ess than 115 gdmin at a 12 A TDH (see 4.5.2). 3.4.2 Current draw. The current draw of the pump assembly shall be as shown in figure 1 (see 4.5.3). 3.4.3 Efficiency. The pump assembly shall have an efficiency as shown in figure 1 (see 4.5.4). 3.4.4 Flow rate. The pump assembly shall have a free flow
25、rate of 130 gdmin, a flow rate of 125 gdmin at a 6 R TDH, and a 30 A minimum stall TDH (see figure 1 and 4.5.5). 3.4.5 Durability. The pump assembly shall show no evidence of performance degradation condition and form of electrodes; fkequency, waveform, rate of application, and duration of test volt
26、age; geometry of the specimen; position of the specimen (particularly oil-filled components); mechanical stresses; and previous test history. Unless these factors are properly selected as required by the type of dielectric, or suitable correction factors can be applied, comparison of the results of
27、individual dielectric withstanding voltage tests may be extremely difficult. 22 Licensed by Information Handling ServicesMIL-PRF-623 3 1 A(AT) APPENDIXA A.4 APPARATUS A4.1 High-voltage source. The nature of the potential (ac or dc) shail be as specified. When an alternating potential is specified, t
28、he test voltage provided by the high-voltage source shall be nominaily 60 hertz in frequency and shail approximate, as closely as possible, a true sine wave in form. other commercial power frequencies may be used for in-plant conformance testing, when specified. All alternating potentials shail be e
29、xpressed as root-mean-square values, unless otherwise specified. The kilovolt-ampere rating and impedance of the source shall be such as to permit operation at ail testing loads without serious distortion of the waveform and without serious change in voltage for any setting. When the test specimen d
30、emands substantial test source power capacity, the regulation of the source shall be specified. When a minimum kilovolt-ampere rating is required, it shall be specified. When a direct potential is specified, the ripple content shall not exceed 5% rms of the test potentid. When required, a suitable c
31、urrent-limiting device shall be used to limit current surges to the value specied. A.4.2 Voltage measuring device. A voltmeter shall be used to measure the applied voltage to an accuracy of at least 5%, unless otherwise specified. When a transformer is used as a high-voltage source of alternating po
32、tential, a voltmeter connected across the primary side or across a tertiary windmg rnay be used provided it is previously determined that the actual voltage across the test specimen will be within the dowable tolerance under any normal load condition. A.4.3 Leakage current measuring; device. When an
33、y leakage current requirements is specified, a suitable method shail be used to measure the leakage current to an accuracy of at least 5% of the specied requirement. A.4.4 Fault indicator. Suitable means shall be provided to indicate the occurrence of disruptive discharge and leakage current in case
34、 it is not visually evident in the specimen. The voltage measuring device of A.4.2, the leakage current measuring device of A.4.3, or an appropriate indicator light or an overload protective device may be used for this purpose. A.5 SUMMARY. The following details are to be specified in the individual
35、 specification: a. Special preparations or conditions, if required (see A.3.1). b. Magnitude of test voltage (see A.3.2). 1. Test voltage, and duration for in-plant conformance testing, if different than for qualification testing (see A.3.5). c. Nature of potential (ac or dc) (see A.4.1). 23 License
36、d by Information Handling ServicesMIL-PRF-6233 lA(AT) APPENDIX A d. Duration of application of test voltage for qualification testing if other than 60 seconds (see k3.5). e. Points of application of test voltage (see A.3.3). 1. Method of testing specimens with movable parts (see A.3.5). f Method of
37、connection of test voltage to specimen, if significant (see A.3.3). g. Regulation, when applicable (see A.4.1). h. Minimum kilovolt-ampere rating of high-voltage source, if required (see A.4.1). i. Limiting value of surge current, if applicable (see A.4.1). j. Maximum leakage current requirement, if
38、 applicable (see A.4.3). k. Measurements after dielectric withstanding voltage test, if required (see A.3.6). 24 Licensed by Information Handling Services MIL-P9F-b2331A 9999906 2045359 999 MIL-PRF-6233 lA(AT) APPENDIX B INSULATION RESISTANCE B.l SCOPE B. 1.1 Scope. The appendix details the procedur
39、e for measuring the resistance offered by the insulating members of a component part to an impressed direct voltage tending to produce a leakage of current through or on the surface of these members. A knowledge of insulation resistances is important, even when the values are comparatively high, as
40、these values may be iimiting factors in the design of high-impedance circuits. Low insulation resistances, by permitting the flow of large leakage currents, can disturb the operation of circuits intended to be isolated, for example, by forming feedback loops. Excessive leakage currents can eventuall
41、y lead to deterioration of the insulation by heating or by direct-current electrolysis. Insulation-resistance measurements should not be considered the equivalent of dielectric withstanding voltage or electric breakdown tests. A clean, dry insulation may have a high insulation resistance, and yet po
42、ssess a mechanical fault that would cause failure in the dielectric withstanding voltage test. Conversely, a dirty, deteriorated insulation with a low insulation resistance might not break down under a high potential. Since insulating members composed of different materials or combinations of materi
43、als may have inherently Werent insulation resistances, the numerical value of measured insulation resistance cannot properly be taken as a direct measure of the degree of cleanliness or absence of deterioration. The test is especially helpful in determining the extent to which insulating properties
44、are affected by deteriorative innuences, such as heat, moisture, dirt, oxidation, or loss of volatile materials. B.2 APPLICABLE DOCUMENTS (This section is not applicable to this appendix.) B.3 PROCEDURE B.3.1 Preparation and measurement. When special preparations or conditions such as special test f
45、ixtures, reconnections, grounding, isolation, low atmospheric pressure, humidity, or immersion in water are required, they shall be specified. Insulation-resistance measurements shall be made between the mutually insulated points or between insulated points and ground, as specified. When electrifica
46、tion time is a factor, the insulation-resistance measurements shall be made immediately after a 2-minute period of uninterrupted test voltage application, unless otherwise specified. However, if the instrument-reading indicates that an insulation resistance meets the specified limit, and is steady o
47、r increasing, the test may be terminated before the end of the specified period. When more than one measurement is specified, subsequent measurements of insulation resistance shall be made using the same polarity as the initial measurements. 25 Licensed by Information Handling ServicesKIL-PRF-bZ33LA
48、 U =?9999b 2045360 600 MIL-PRF-6233 lA(AT) APPENDIX B B. 3.2 Factors afEecting use. Factors affecting insulation-resistance measurements include temperature, humidity, residual charges, charging currents of time constant of instrument and measured circuit, test voltage, previous conditioning, and du
49、ration of uninterrupted test voltage application (electrification time). In connection with this last-named factor, it is characteristic of certain components (for example, capacitors and cables) for the current to usually fall f?om an instantaneous high value to a steady lower value at a rate of decay which depends on such factors as test voltage, temperature, insulating materials, capacitance, and external circuit resistance. Consequently, the measured insulation resistance will increase for an appreciable time as test voltage is applied uninterruptedly. Because of this pheno
