ASTM F555-2001(2016) Standard Test Method for Motor Life Evaluation of an Upright Vacuum Cleaner《评估立式真空吸尘器发动机寿命的标准试验方法》.pdf

1、Designation: F555 01 (Reapproved 2016) An American National StandardStandard Test Method forMotor Life Evaluation of an Upright Vacuum Cleaner1This standard is issued under the fixed designation F555; the number immediately following the designation indicates the year of originaladoption or, in the

2、case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers motor life evaluation of house-hold or commercial single and dual mo

3、tor upright vacuumcleaners (uprights with separate motors for creating thevacuum and driving the floor brush). Self-propelled or power-assist cleaners are not within the scope of this test method.1.2 This test method is limited to evaluation of the uprightvacuum cleaner electric motor(s).1.3 This te

4、st method provides a test to determine operatinglife of the motor(s), before servicing is needed, by an acceler-ated laboratory procedure. Motor(s) are tested while mountedand operated in the upright vacuum cleaner.1.4 The values stated in inch-pound units are to be regardedas standard. The values g

5、iven in parentheses are mathematicalconversions to SI units, which are provided for informationonly and are not considered standard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establ

6、ish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D75 Practice for Sampling AggregatesE337 Test Method for Measuring Humidity with a Psy-chrometer (the Measurement of Wet- and Dry-Bulb Tem-p

7、eratures)F431 Specification for Air Performance Measurement Ple-num Chamber for Vacuum CleanersF608 Test Method for Evaluation of Carpet Embedded DirtRemoval Effectiveness of Household/CommercialVacuum CleanersF655 Specification for Test Carpets and Pads for VacuumCleaner Testing3. Terminology3.1 De

8、finitions of Terms Specific to This Standard:3.1.1 motor lifelimited by failure of motor. Failure ismotor stoppage. In the case of a dual motor upright, the testwill be continued until both motors (vacuum motor and floorbrush motor) have failed. The motor that fails first will bereplaced so that the

9、 test may continue on the other motor. Themotor life of each motor will be recorded separately.3.1.1.1 DiscussionAny failure integral with the motor,such as armature assembly, field assembly, housing(s),bearings, motor cooling fan or primary air moving fan, brushassemblies, motor mounted nonresettab

10、le thermal protectiondevices, or any other component judged to be integral with themotor, shall be judged as motor stoppage.4. Significance and Use4.1 The test results provide an indication of the motor life ofan electric upright vacuum cleaner. End of motor life will bejudged in accordance with Sec

11、tion 3.5. Apparatus and Materials5.1 Voltage Regulator System, to control the input voltage tothe vacuum cleaner. The regulator system shall be capable ofmaintaining the vacuum cleaners rated voltage 61 % andrated frequency 61 Hz, having a wave form that is essentiallysinusoidal with 3 % maximum har

12、monic distortion for theduration of the test.5.2 Voltmeter, to provide measurements accurate to within61%.5.3 Timer and Switch, having the capacity to control theoff/on duty cycle of the cleaner during the life test.5.4 Sharp Edge Orifice Platea114-in. (32-mm) diameterorifice shall be in accordance

13、with Fig. 2 of Specification F431.5.5 Wattmeter, to provide measurements accurate to within1%.5.6 Plenum Chamber, conforming to the plenum chamberdescribed in Specification F431.5.7 Water Manometer, or equivalent instrument measuringin increments of 0.1 in. (2.54 mm).1This test method is under the j

14、urisdiction ofASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.30 on Durability-Reliability.Current edition approved Oct. 1, 2016. Published October 2016. Originallyapproved in 1985. Last previous edition approved in 2011 as F555 01 (2011).DOI: 10.1520/F0555-

15、01R16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO

16、 Box C700, West Conshohocken, PA 19428-2959. United States15.8 Barometer, to provide measurements accurate to 60.05in. Hg (1.27 mm Hg), with scale divisions 0.02 in. (0.51 mm)or finer.5.9 Thermometer, having a range of at least 18 to 80F (8to +27C) and graduated in 1F (0.5C) increments.5.10 Psychrom

17、eter, meeting the requirements of TestMethod E337 for thermometers, graduated in increments of1F (0.5C).5.11 Test Carpet, conforming to the level loop carpetdescribed in Specification F655.Acarpet that provides equiva-lent nozzle loading results may be used.5.12 Carpet Padding (optional), if used, t

18、he test carpetpadding will conform to the padding described in SpecificationF655.5.13 Test Fixture, a moving surface covered by the testcarpet supported on the test pad, which moves with a horizon-tal reciprocating motion, for a stroke distance of 27 in. (686mm) in each direction at the average rate

19、 of 1.8 ft/s (0.55 m/s),which results in 24 cycles (forward and back) per minute. Thismotion shall be generated by rotating a 13.5-in. (343-mm)radius arm, which shall be connected to the platform with anarm at least 24 in. (610 mm) long or equivalent. This deviceshall provide means to hold the clean

20、er fixed by its handlestationary in the operating position while it is in contact withthe reciprocating surface (see Fig. 1). Optionally, the cleanercan be moved through the same cycle as stated above while thecarpeted platform is held stationary (see Fig. 1). For eitheroption, the reciprocating mot

21、ion shall follow the same dutycycle as specified for the vacuum cleaner in 7.7. For theoptional test fixture of Fig. 1, the reciprocating arm must be ateither end of its horizontal motion at the start of each “on”portion of the cycle.5.14 Test Dirt, Wedron sand/talc mixture. See Annex A1.6. Sampling

22、6.1 Test a minimum of three units (or a larger sample size ifdesired) of similar models using the same motor style andamperage. Select all samples at random in accordance withgood statistical practice. Results shall provide an 80 % confi-dence level within 610 % of the mean value. If not, testadditi

23、onal samples or reduce the results by the penalty factor ascalculated in 7.10.7. Procedure For Motor Life Evaluation7.1 Determine initial performance as follows:7.1.1 Seal the nozzle opening to the plenum chamber with amanometer (or equivalent) connected to the chamber and witha114-in. (32-mm) diame

24、ter sharp-edge orifice in the holder.For the test, connect the agitator drive belt and a clean filter orfilter bag to the cleaner. The agitator shall be operating freelywith the handle in the operating position as shown in Fig. 1.7.1.2 With the cleaner sealed to the plenum chamber andwithout an orif

25、ice plate in the holder, energize the cleaner atrated voltage 61 % and rated frequency 61 Hz for 5 min tostabilize motor temperatures.7.1.3 With the cleaner operating at a constant rated voltage,insert the 114-in. (32-mm) diameter sharp-edge orifice into theholder on the orifice box.7.1.4 Record the

26、 manometer reading as soon as the readingstabilizes.7.1.5 Record the wattage of the cleaner on the plenumchamber. The wattage reading is used to monitor the cleanerload.7.1.6 Measure the airflow and wattage reading every 168 hto determine if some component has failed and degradedperformance, reducin

27、g the load on the cleaner during the lifetest. If degradation exceeds 40 % see 7.9.1 7.9.3.7.1.7 Monitor the suction of the cleaner during the test inaddition to the weekly measurement on the plenum chamber tomaintain loading and to ensure that no mechanical problemsexist.7.2 Use a new section of ca

28、rpet and padding without holes,tears, or other signs of wear when the test is started. Tautlysecure the carpet. The lay of the carpet pile shall be such thatduring the forward stroke, the cleaner moves in the direction ofthe lay of the carpet pile. See Fig. 1.7.3 Install the cleaner on the test fixt

29、ure as shown in Fig. 1.7.4 If various settings are provided, set the motor speedsetting, suction regulator, nozzle height, or a combinationthereof, in accordance with the manufacturers specified settingfor using the cleaner on the level loop test carpet. The settingshall be the same as that used for

30、 Test Method F608.7.5 Keep the load within limits by controlling changes in thecarpet, agitator brush, drive belt, and airflow as determined in7.5.1 7.5.4.FIG. 1 Test FixtureF555 01 (2016)27.5.1 Replace the carpet when one fourth of the pile heightis worn away, except at the beginning and end of the

31、 strokepath.7.5.2 During the life test, change the agitator brush(es)every 168 h of cycling time.7.5.3 Change the drive belt every 168 h of cycling time, orif it ceases to drive the agitator on the test carpet prior to 168h.7.5.4 During the life test, change the disposable filter(s) orclean the reus

32、able primary and secondary filters every 168 h ofcycling time, or when the airflow decreases 40 % due to filterclogging.To determine if the filters must be changed or cleanedprior to the 168 h period, conduct an initial dust clogging testin accordance with the procedure described in Annex A4.7.6 Per

33、form all tests in a controlled ambient atmospherewith a dry bulb temperature of 68 to 81F (20 to 27C) and arelative humidity of 30 to 50 %.7.7 Operate the cleaner at rated voltage 61 % and ratedfrequency 61 Hz from a remote on/off switch and timer witha duty cycle of 8 min of operation followed by 2

34、 min off.During the test, bypass the switch on the cleaner.7.8 Spread 10 g of the standard dirt mixture (Annex A1)atthe start of the test and once every 24 h of cycling time on thetest carpet. Spread evenly over the area traversed by the nozzleopening.7.9 Test for degradation of performance every 16

35、8 h ofcycling time.7.9.1 Airflow LossIn accordance with the procedure inAnnex A2, use the suction at the start of the test in 7.1.4 as thebase for determining the 40 % degradation of performance.7.9.2 Measure suction in the operating position to serve as abase line to determine if degradation has oc

36、curred.7.9.3 If degradation is present, determine and correct thecause. Replace any part, except the motor, to bring the systemwithin performance limits and continue the test.7.10 Judge the end of the test in conformance with Section3. Express life in terms of “on” (hours) only.7.11 Calculate an est

37、imate of the population mean in accor-dance with the following procedure:7.11.1 Calculate the sample mean for units tested and theconfidence interval half-width:x 5(i51nxi(1)h 5ts=n(2)where:x = mean of sample,n = sample size,xi= life, in hours of “on” time, for each sample tested,h = half-width of c

38、onfidence interval,t = value from t distribution table for 80 % (t0.90) confi-dence level and degrees of freedom = n 1 (seebelow), ands = standard deviation of sample.Percentiles of the t DistributionDegrees of Freedom t0.901 3.0782 1.8863 1.6384 1.5335 1.4766 1.4407 1.4158 1.3979 1.38310 1.37211 1.

39、36312 1.35613 1.35014 1.34515 1.3417.11.2 Compare the sample mean and confidence intervalhalf-width to determine whether a penalty factor is required:(1) If h 0.1 x, use x as the published value.(2) If h 0.1 x, test additional units to meet the confidencelevel, or use the following penalty factor ()

40、: 5 h 2 0.1 x (3)Use x as the published value.8. Precision and Bias8.1 PrecisionA meaningful precision statement cannot bemade due to the number of components in the motor, each ofwhich could constitute failure of the motor.8.2 BiasA bias statement cannot be applied to this testmethod because there

41、is no standard reference for comparison.9. Keywords9.1 durability; upright vacuum cleanerF555 01 (2016)3ANNEXES(Mandatory Information)A1. DIRT MIXTUREA1.1 Test DirtA1.1.1 Ten grams of the test dirt consists of the following:90%(wt)9gofsilica sand310%(wt)1gofunscented commercial grade talcum4A1.2 Ana

42、lysis of Silica SandSieve Range(U.S. No.)Particle Size (m) Amount Used (g)30 to +40 600 to 425 0.0940 to +50 425 to 300 3.1550 to +70 300 to 212 4.1470 to +100 212 to 150 1.35100 to +140 150 to 106 0.27A1.3 Analysis of Unscented Commercial Grade TalcumDistribution by Weight (%) Particle Size Range (

43、m)0.5 4412.5 20 to 43.927.0 10 to 19.923.0 5 to 9.920.0 2 to 4.98.0 1 to 1.99.0 0.36 h1,the test requirement for airflow/suction load is maintained.A2.2 Derivation:Q15 21.844D2K =h1(A2.2)Since D2and K are constants, then Q1/Q25=h1/=h2andQ2= 0.6 Q1at the point when servicing may be required.Therefore

44、, Q2/0.6Q15=h1/=h2, or =h250.6 =h1, or h250.36 h1at the servicing point.A2.3 Terms:Q1= initial airflow,Q2= airflow at servicing point,h1= initial suction,h2= suction at failure point, andD = orifice diameter.3The sole source of supply of the silica sand known to the committee at this timeis Wedron S

45、ilica Co., Customer Service Dept., P.O. Box 119, Wedron, IL 60557. Ifyou are aware of alternative suppliers, please provide this information to ASTMInternational Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.Th

46、e test dirtmust be sieved to ensure conformance with the analysis limits. Use Practice D75.4The sole source of supply of the silica sand known to the committee at this timeis Luzenac America, Inc., 9000 E. Nichols Ave., Suite 200, Englewood, CO 80112.If you are aware of alternative suppliers, please

47、 provide this information to ASTMInternational Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.F555 01 (2016)4A3. CORRECTION OF DATA TO STANDARD CONDITIONSA3.1 Air Density RatioThe density ratio, Dr, is the ratio

48、of the air density at the time of test, test, to the standard airdenstiy, std= 0.0750 lb/ft3(1.2014 kg/m3). It is used to correctthe vacuum and wattage readings to standard conditions. Findtest(lb/ft3or kg/m3) from standard psychrometric charts orASHRAE tables and calculate Drfrom the following equa

49、tion:Dr5teststd(A3.1)where:test= the air density at the time of test, lb/ft3, andstd= the standard air density, 0.0750 lb/ft3.As an alternate use the following equation:17.68 Bt2 0.001978 Tw21 0.1064 Tw(A3.2)Dr510.002475BtTd2 Tw! 2 2.741Td1459.7!where:Bt= barometric pressure at time of test (absolute), in. Hg,Td= dry-bulb temperature at time of test, F, andTw= wet-bulb temperature at time of test, F.NOTE A3.1This equation is intended for use in correcting the ambientconditions where the barometric pressure exceeds 27