NAVY MIL-S-21558 A-1973 SEAL OIL PLAIN OR PLAIN ENCASED《平密封或平装密封油》.pdf

1、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2 1558A (OS) SPECIFICATIONS Federal PPP-B-60 1 PPP- B-636 PPP-B- 1055 Mi lit ary MIL-P-116 MIL-B-121 MIL-A- 140 MIL-L-3150 MIL-H-5606 MIL-F-17111 STANDARDS Federal FED-STD- 15 1 Mi lit ary MIL-STD

2、- 105 MIL-STD-129 MIL-STD-1186 Box, Wood, Cleated- Plywood Box, Fiberboard Barrier Material, Waterproofed, Flexible Preservation, Methods of Barrier Material, Greaseproofed, Flexible (Waterproofed) Adhesive, Water-Resistant, Waterproof Barrier- Mat e ri a 1 Lubricating Oil, Preservative, Medium Hydr

3、aulic Fluid, Petroleum Base, Aircraft and Ordnance Fluid, Power Transmission Metals, Test Methods Sampling Procedures and Tab les for Inspection by Attributes Marking for Shipment and Storage Cushioning, Anchoring, Bracing, Blocking, and Waterproofing, With Appropriate Test Methods Provided by IHSNo

4、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-S-2155A 53 9797706 OL032b3 L1 MIL-S-21558A (OS) DRAWINGS Department of the Navy BUORD Sketch No, 94307 Grease and Oil Seal Test Machine (List of Drawings for) (Copies of specifications, standards, drawings, and pu

5、blications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the con- tracting officer. *2.2 Other publications. The following document forms a part of this specification to the extent specified herein. Unless o

6、therwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply, American National Standards Institute, Inc. ANSI B46.1 Surface Texture (Copies of the above publication may be obtained from the American National Standards Institute, Inc., Dept. 1270, 1430 B

7、roadway, New York, N. Y. 10018.) 3. REQUIREMENTS “3.1 First article. Prior to commencing production, oil seals to be furnished under this specification shall be submitted to the activity designated in the contract or purchase order for first article inspection to determine conformance to the require

8、ments of this specification, The first article submitted by a contractor shall be fully representative of the oil seals to be supplied from production facilities and tooling. 3.2 Component parts. Oil seals nent parts. ,- 3.2.1 Sealine element. The sea shall ing e consist of the following compo- “ em

9、ent shall be of a flex ble, It shall be a concentric ring which The sealing ele- tough, homogeneous, nonabrasive, oil ;esistant material capable of with- standing the tests specified herein. will remain firm and resilient during its service life. ment shall be capable of establishing and maintaining

10、 a sealing contact Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2355A 53 I 9799906 0303264 6 I MIL-S-21558A (OS) with minimum frictional drag for operating shaft speeds up to 2,000 feet per minute (fpm) rubbing velocity at the sealing lip of

11、 the sealing ele- ment. the shaft rotation limit of 3,600 revolutions per minute (rpm). Sealing elements which unravel, fray, or become spongy during tests are not acceptable. The sealing element shall be capable of maintaining a mini- mum of leakage (see 3.6) against pressure equivalent to 6 inches

12、 head of hydraulic fluid measured from the centerline of the shaft. This feature will be checked during the torque tests of 4.7.2.1 and the endurance test of 4.7.2.2. Such shaft speed of 2,000 fpm rubbing velocity shall be within 3.2.2 Pressure element. The use of an external pressure element is opt

13、ional with the manufacturer. If used, the pressure element shall exert pressu.re evenly around the sealing lip of the sealing element, insure contact between the sealing lip and the mating surface, and auto- matically take up any wear of the sealing lip under the conditions of speed and eccentricity

14、 specified (see 3.2.1 and 3.3). The pressure ele- ment shall be anchored or secured to the oil seal in a manner which will assure its remaining in position during installation and operation. The pressure element shall be of a corrosion resistant material. pressure elements are not acceptable. Plated

15、 3.2.3 Encasing components. Unless otherwise specified in the contract or order (see 6.21, oil seals shall be furnished with either a metallic case, a nonmetallic case with internal metal stiffener, or a nonmetallic case at the option of the contractor (see figures 1, 2, and 3). encasing component s

16、hall be constructed to retain and anchor the sealing element and act as a sealing member under all conditions of service for which it is intended without misalignment or objectionable distortion. The 3.2.3.1 Metallic case. Unless otherwise specified in the contract or order (see 6.2), metallic cases

17、 shall be made of either plated, plain steel or corrosion-resisting steel at the option of the contractor. mium plated cases are not acceptable. Cad- 3.2.3.2 Nonmetallic case with internal metal stiffener. Nonmetallic cases with internal metal stiffeners shall be made of synthetic compound chemicall

18、y bonded to an internal metal stiffener. ing element shall be made of the same material. The case and the-seal- 3.2.3.3 Nonmetallic case. Nonmetallic cases shall be made of synthetic compound or of a fiber and compound composition chemically bonded to the sealing element. 4 Provided by IHSNot for Re

19、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-21558A 53 m 7777906 0303265 8 m MIL-S- 2 155 8A (OS) Metal FIGURE 1. OIL SEAL, METAL ENCASED CONSTRUCTION Metal Synthetic compound I FIGURE 2. OIL SEAL, SEMIMETALLIC SHELL CONSTRUCTION I x:inthetic compound Fiber and synt

20、hetic 1- - compound composition I FIGURE 3. OIL SEAL, NONMETALLIC SHELL CONSTRUCTION *3.3 General operational requirements. Oil seals shall be self- contained units in which the sealing element and other parts required by the design are suitable for concentric and snug assembly in housing bores, the

21、 diametral tolerances of which are as follows: fO.001 inch for bores up to and including 3.000 inches f0.0015 inch for bores of 3.001 to and including 6.000 inches fO.002 inch for bores of 6.001 inches and larger. Oil seals shall operate without deterioration while in contact with petroleum base flu

22、ids, such as those conforming to MIL-F-17111 or MIL- H-5606 and shall be capable of satisfactory operation with shafts having a surface roughness of 8 to 16 microinches RHR (see ANSI B46.1 for method Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI

23、L-S-21558A (OS) of interpretation), a minimum hardness of 30 Rockwell on the C scale, and eccentricities (total indicator runout) (TIR) not exceeding the following limits : 0.003 inch for shaft diameters up to and including 1.0 inch 0.005 inch for shaft diameters over 1.0 inch to and including 0.008

24、 inch for shaft diameters over 2.0 inches. 2.0 inches 3.4 Shape and dimensions. The detail shape, in cross-section, of oil seals shall be in accordance with the cuts or drawings furnished with the contract or order. in the contract or order (see 6.2). Dimensions and tolerances shall be as specified

25、3.5 Torque. Oil seals submitted for test shall develop friction torque no greater than the torque values specified in table I when tested in the grease and oil seal test machine (BUORD Sketch No. 94307). Values given are for one seal, which is assumed to be one-half of the torque measured for two se

26、als of equal size after correction has been made for the bearing torque of the test machine. Table I OIL SEAL TORQUE VALUES1 Grade Torque values at 70 to 74 F . class (max.) Grade A Class 1 Class 2 Grade B Class 1 Class 2 O, OITD O, 30rD2 O. 457D O. 45nD2 Torque values at -65“ F (max.) O. GOITD - O.

27、 75vD2 - Torque values at -20 F (max.) - O .45.rrD2 - O, 65m-D2 Values are in pound-inch; D is the shaft diameter in inches. *3.6 Leakage. The maximum rate of leakage of hydraulic fluid (MIL- F-17111 or MIL-H-5606) past the sealing lip of any oil seal, at any temperature within its operating range (

28、see 1.2) shall not exceed 0.1 cubic centimeter per circumferential inch of shaft per hour, assembled in a standard bore, any leakage other than past the sealing lip shall be cause for rejection. When Measurements of leakage shall be made 6- -. Provided by IHSNot for ResaleNo reproduction or networki

29、ng permitted without license from IHS-,-,-MIL-S-21558A (OS) in accordance with 4.7.2.3 during the torque tests of 4.7.2.1 and endur- ance test of 4.7.2.2, including stand by as well as running time. “3.7 Volumetric change. The oil seal sealing element, when immersed in fluid conforming to MIL-F-1711

30、1, shall not show an increase in volume exceeding 10.0 percent or a volume decrease exceeding 1.0 percent. Upon exposure to oil, the sealing element shall not break down, soften, or rough en. 3.8 Reaction with metals. The sealing element and the shell or case of the oil seal shall not cause corrosio

31、n or pitting of the metal part with which it is in contact. not be cause for rejecting the oil seal. Slight discoloration of the metal shall 3.9 Adherence to metals. The sealing element and the shell or case of the oil seal shall not adhere or stick to the metal part with which it is in contact. The

32、 material shall be considered as adhering or stick- ing to the metal if particles or pieces of the sealing element, shell, or case remain adhered or stuck to the metallic surface either through operation of the metallic part in the oil seal or upon removal of the oil seal from the assembly. 3.10 End

33、urance. Oil seals shall be capable of withstanding the endurance test of 4.7.2.2 without exceeding the leakage requirement of 3.6. After test, the seals shall be serviceable with no evidence of cracking, flaking, excessive wear, or other malfunctioning. Normal wear shall not be considered as malfunc

34、tioning; however, it shall not include disintegration. with the 70 to 74O F torque requirements of table I. At the conclusion of the test, the seals shall comply 3.11 Salt spray. The exposed metal parts of the oil seal (case and pressure element) shall show no more than slight discoloration followin

35、g the salt spray test of 4.7.1.3, and the sealing element shall not be injuriously affected by contact with the salt spray. 3.12 Workmanship. Sealing surfaces of oil seals shall be smooth and free from blemishes, irregularities, and other defects, Workmanship shall follow standards of high grade com

36、mercial practice and shall be first class in every respect. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- S- 2 155 8A (OS) 4. QUALITY ASSURANCE PROVISIONS AND TEST REQUIREMENTS “4.1 Responsibility for inspection, Unless otherwise specified i

37、n the contract or purchase order, the supplier is responsible for the perfor- mance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspec- tion requir

38、ements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. *4.2 Classification of in

39、spections. The inspection requirements speci- fied herein are classified as follows: (1) First article inspection (4.3) (2) Quality conformance inspection (4.4). “4.3 First article inspection. First article ,nspection shall consist of examinations and tests for all the requirements of this specifica

40、tion. Failure of any oil seal in the sample to meet any requirement shall be cause for rejection of the first article sample. *4.4 Quality conformance inspection. Unless otherwise specified in the contract or purchase order, quality conformance inspection for accep- tance of individual lots shall co

41、nsist of the examinations of 4.6. 4.5 Sampling. 4.5.1 - Lot. For the purpose of sampling, a lot shall consist of all the oil seals of the same type, grade, class, and size offered for inspection at one time. “4.5.2 Sampling for first article inspection. Sample oil seals of the same types, grades, an

42、d classes being submitted for first article inspec- tion shall be of the sizes and in the quantities specified below: Shaft di ame t er Housing diameter No, of seals (inches ) . (inches) in samples 3- 1/2 2-5/8 7/8 4- 1/2 1-1/2 3-5/8 12 12 12 8 Provided by IHSNot for ResaleNo reproduction or network

43、ing permitted without license from IHS-,-,-MdL-S-21558A (OS) The manufacturer shall supply the testing activity with a certified state- ment of prior tests showing that the samples being submitted conform to all requirements of this specification. Samples shall be forwarded to the test laboratory de

44、signated in the contract or purchase order. All packing containers shall be plainly marked as follows: (a) Title, number, and date of this specification (b) (c) (d) Types, grades, classes, and sizes (e) Manufacturers designation or brand name (f) Name of manufacturer and plant address. Sample for fi

45、rst article inspection Applicable drawing number and piece number “4.5.3 Sampling for quality conformance inspection. Unless otherwise specified in the contract or purchase order, sampling for quality confor- mance inspection shall be in accordance with the provisions of MIL-STD- 105. 4.5.4 Sampling

46、 for inspection of filled containers. A random sample of filled containers shall be selected in accordance with the provisions Of MIL-STD-105 4.6 Examinations. 4.6.1 Visual and dimensional. Oil seals shall be visually examined for completeness of manufacture, freedom from defects, proper identifi- c

47、ation, and workmanship, Dimensional and other nondestructive inspec- tions shall be made in accordance with the acceptance inspection instruc- tions provided by the procuring activity. 4.6.2 Packaging, packing, and marking, Each sample filled container shall be examined to determine conformance to t

48、he requirements of sec- tion 5. tion, proper closure, and unsatisfactory marking. Any container in the sample having one or more defects or under required fill shall be rejected and disposition of the lot shall be in accordance with MIL-STD-105. Each sample container shall be examined fordefects of

49、construc- 4.7 Tests. 4.7.1 Physical properties tests. “4.7.1.1 Volumetric change. The oil seal sealing element shall be . tested for volumetric change to determine compliance with the requirements Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1-S-21558A (OS) of 3.7. the 2,625-inch shaft diameter size of oil seal or s