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Example 9Horizontal-Moving Load-RotaryDISTANCE FROMPIVOTTO CENTEROF GRAVITY(INCHES)WEIGHTModel Selection: SALD ½ x 1SHOCK ABSORBERMOUNTING RADIUS(INCHES)K = Distance to C.G.from Pivot = 30 in.cW = 900 lbs.A = Rotation angle = 90ºt = Time thru angle = 3 secRs = Shock absorber mtg.radius = 29 in.F = 0S = 1 in. *C = 100/hr.Vs = Vel. @ Rs (ft./sec.)Velocity of Load =(A x K) / [688t] = 90 x 30 / [688 x 3] = 1.31 ft./sec.E 1= .2WV² = .2 x 900 x (1.31)² = 309 in-lbs.E 2= 0E 3= E 1+ E 2= 309 in.-lbs.E 4= E 3x C = 309 x 100 = 30,900 in.-lbs./hr.VS = (A x RS) / [688t] = 90 x 29 / [688 x 3] = 1.26 ft./sec.WE = E 3/ [.2VS²] = 309 in.-lbs. / [.2(1.26)²] = 973 lbs.Example 10Horizontal-Propelled Moving Load-RotaryMOTOR DRIVEW = 900 lbs.E 1= .2WV² = .2 x 900 x 4² = 2,880 in.-lbs.TORQUEK = Distance to C.G.VS = V x Rs / [K] = 4 x 29 / [30] = 3.87 ft./sec.from Pivot = 30 in.(V) VELOCITYF = 1,375 x HP / [ Vs ] = 1,375 x 1 / [3.87] = 355 lbs.V = Linear VelocityDISTANCE FROME 2= F x S = 355 x 2 = 710 in.-lbs.PIVOT TO CENTERSHOCK ABSORBER at C.G. = 4 ft./sec.OF GRAVITYMOUNTING RADIUS(INCHES) Rs = 29 in.E 3= E 1+ E 2= 2,880 + 710 = 3,590 in.-lbsS = 2 in. *E 4= E 3x C = 3,590 x 100 = 359,000 in.-lbs./hr.WEIGHTC = 100/hr.WE = E 3/ [.2VS²] = 3,590 / [.2(3.87)²] = 1,199 lbs.HP = 1 HorsepowerVs = Vel. @ Rs (ft./sec.)Model Selection: SALD ¾ x 2*Note: These items will vary with individual applications and were selected for illustration purposes only.Example 11Horizontal-Rotary Index TableANGULAR VELOCITY(RADIANS/SEC.)(W) TABLEWEIGHTROTARY TABLE DIA.STROKESHOCK ABSORBERMOUNTINGRADIUS (INCHES)W = 900 lbs.V T= 4 ft./sec. at 36 in.from PivotC = 100/hr.F = 0Rs = 30 in.DT = Table Dia. = 72 in.RT = 36 in.Vs = Vel. @ Rs (ft./sec.)E 1= .1WVT² = .1 x 900 x 4² = 1,440 in-lbs.E 2= 0E 3= E 1+ E 2= 1,440 in.-lbs.E 4= E 3x C = 1,440 x 100 = 144,000 in.-lbs./hr.VS = (VT x RS) / [RT] = (4 x 30) / [36] = 3.3 ft./sec.WE = E 3/ [.2VS] = 1,440 / [.2(3.3)²] = 661 lbs.General InformationModel Selection: SALD ½ x 2Example 12Horizontal-Rotary Index Table PropelledMOTOR DRIVETORQUEωANGULAR VELOCITYROTARY TABLE DIA.(W) TABLE WEIGHTRTRSSHOCK STROKE(INCHES)SHOCK ABSORBERMOUNTINGRADIUS (INCHES)W = 900 lbs.w = 2 Radians/sec.T = 1,500 in.-lbs. at tableS = 2 in. *C = 100/hr.Rs = 30 in.RT = Radius of table = 36 in.Vs = Vel. @ Rs (ft./sec.)VT = (w x RT) / [12] = (2 x 36) / [12] = 6 ft./sec.E 1= .1WVT² = .1 x 900 x 6² = 3,240 in-lbs.F = T / RS = 1,500 / 30 = 50 lbs.E 2= F x S = 50 x 2 = 100 in.-lbs.E 3= E 1+ E 2= 3,240 + 100 = 3,340 in.-lbs.E 4= E 3x C = 3,340 x 100 = 334,000 in.-lbs./hr.VS = (w x RS) / [12] = 2 x 30 / [12] = 5 ft./sec.WE = E 3/ [.2VS²] = 3,340 / [.2(5)²] = 668 lbs.Model Selection: SALD ¾ x 2*Note: These items will vary with individual applications and were selected for illustration purposes only.23435 Industrial Park Dr., Farmington Hills, MI 48335 • p: 734-595-4500f: 734-595-6410 • customerservice@enertrols.com • www.enertrols.com14