Wichita Clutch LKM Clutch User Manual

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Industrial Clutch Products

MODEL LKM

Air Set Marine Clutches

I N D U S T R I A L C L U T C H P R O D U C T S 40

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LKM Clutch Design Features

Rotary air inlet.

Compact multiple disc construction means less overhung weight and minimum gear center requirements.

Clutch designed with total attention given to maximizing ventilation for cool-running operation and the ability to perform high energy engagements with minimum temperature build-up.

Precision machining of all components ensures positive interchangeability of all mating parts.

Outboard quill support bearing cavity machined integral with the clutch cylinder in a steel or cast iron sleeve.

Positive Plate Separation

Separating springs are integral with each clutch disc to positively separate and hold the discs in a fixed disengaged position.

Cylinder/piston made of high strength aluminum alloy to minimize overhung weight.

High strength hardened alloy s

teel drive hub splines coated with a baked-on high temperature solid film lubricant for excellent c

om-patibility and longevity.

Inner disc drive spline length sized for maximum load-carrying capacity.

High quality non-asbestos lining materials and maximum areas ensure excellent heat dissipation and lining life.

High strength hardened alloy steel drive studs ensure free plate motion during engagement and disengagement. The use of drive studs, rather than splines, allows wear particles and other contaminants to exit the clutch as well as provides an excellent path for cooling air flows.

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LKM Clutch Design Features

Model LKM-330-B clutches, each rated 5250 HP @ 500 RPM connect dual engine

inputs to a single propeller on a Falk Model 55 x 20 DMA1-S marine gear.

LKM AIR SET MARINE CLUTCH DEVELOPMENT HISTORY

The Model LKM marine clutch incorporates many of the features found in our Model LK clutch series with some notable exceptions. Cyclic applications, where the LK style finds its most frequent use, contain duty cycles which bear little resemblance to marine main propulsion service. Marine clutches are required to make infrequent, yet in some instances, severe engagements from a heat standpoint. The clutches are also called upon to run for extended periods in the engaged position (ahead clutches) and for extended periods in the disengaged position (reverse clutches).

The Model LK clutches were rugged enough to handle the load duty cycle from a torque and heat standpoint but required modification to their separation systems in order to be suitable for marine service. Industrial Clutch Products was the first to recognize the importance of positive plate separation for marine service and all clutches installed in marine service contained this feature. Disc clutches for marine service without positive plate separation have experienced a sad approval rating from users.

This is particularly true in forward/reverse service where, strangely enough, the unloaded reverse clutch gives the greatest degree of trouble. Because of the gearing arrangement, the outer members of this clutch rotate in

Photo courtesy of Falk Corporation

one direction while the inner member rotates in the other. This gives rise to the term “twice relative rotation.” The cant of the gear to which these clutches are mounted in order to align with the propeller shaft as well as vessel motion due to wave action causes the clutch plates, if not positively separated, to kiss and wear or burn-out. Exactly the same result would occur if one were going down the road in an automobile at a high rate of speed with the brake pedal lightly depressed.

To eliminate this, Industrial Clutch Products designed and patented positive plate separation which has accrued over 30 years of field experience in marine main propulsion service. The separating system is self-adjusting for wear and no adjustments are ever required by the user during regular use or during routine maintenance. No plate contact can occur with this unique positive plate separation system and the many advantages of the disc clutch can be fully realized for marine service.

The incorporation of positive plate separation, a bearing cavity for the outboard quill bearing, and modifications made to increase the load carrying capacity on a continual basis changed the time-proven LK design into the Model LKM marine clutch.

I N D U S T R I A L C L U T C H P R O D U C T S 42

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Model LKM

3/4"-NPT ROTARY AIR INLET

MOUNTING PLATE ADAPTORS AVAILABLE AS AN OPTION

OUBLE DISK LKM CLUTCH

DIMENSIONAL DATA All dimensions in inches

LKM GH N

Model ABCDEFMin.-Max. No.-Size IJKLMMin.-Max.

LKM-213 8.69 7.86 16.63 16.25 14.65 5.25 2-7/8 - 3-1/2 8-15/16 1 .44 1.50 .18 4 3-1/2 - 4-3/8 LKM-313 10.50 9.69 16.63 16.25 14.63 7.06 2-7/8 - 3-1/2 8-15/16 1 .44 1.50 .18 4 3-1/2 - 4-3/8

LKM-218 11.31 10.31 22.63 21.50 20.00 7.75 2-7/8 - 4-1/8 12 - 1-1/16 1 .56 1.38 .18 4 4-1/2 - 5-9/16 LKM-318 14.19 13.19 22.63 21.50 20.00 10.63 2-7/8 - 4-1/8 12 - 1-1/16 1 .56 1.38 .18 4 4-1/2 - 5-9/16

LKM-221 11.06 10.44 25.00 24.50 22.50 6.81 3-3/8 - 5-1/2 12 - 1-1/16 1 .31 2.19 .18 4 4-1/2 - 5-15/16 LKM-321 13.63 13.00 25.00 24.50 22.50 9.38 3-3/8 - 5-1/2 12 - 1-1/16 1 .31 2.19 .18 4 4-1/2 - 5-15/16

LKM-225 14.38 13.63 29.75 29.25 27.00 8.50 4-5/8 - 7-1/2 12 - 1-5/16 1-1/4 .78 3.31 .18 4 4-1/2 - 6 LKM-325 17.63 16.86 29.75 29.25 27.00 11.75 4-5/8 - 7-1/2 12 - 1-5/16 1-1/4 .78 3.31 .18 4 4-1/2 - 6

LKM-230 15.63 13.25 35.50 35.00 32.00 9.00 5-1/4 - 9-5/8 12 - 1-1/4 2 1.06 3.06 .25 4-5/8 5 - 8 LKM-330 18.94 16.56 35.50 35.00 32.00 12.25 5-1/4 - 9-5/8 12 - 1-1/4 2 1.06 3.06 .25 4-5/8 5 - 8

LKM-235 15.63 13.38 41.50 40.75 36.88 7.69 8 - 12 24 - 1-1/4 2 1.13 3.88 .25 3-7/8 6 - 9-1/16 LKM-335 18.06 15.81 41.50 40.75 36.88 10.13 8 - 12 24 - 1-1/4 2 1.13 3.88 .25 3-7/8 6 - 9-1/16

LKM-242 18.27 16.58 48.75 48.00 44.00 10.75 8 - 12 24 - 1-3/4 3 1.00 4.00 .25 3-7/8 6-1/2 - 9-1/16 LKM-342 22.13 20.44 48.75 48.00 44.00 14.63 8 - 12 24 - 1-3/4 3 1.00 4.00 .25 3-7/8 6-1/2 - 9-1/16

LKM-248 21.02 18.77 54.75 54.00 50.00 11.56 9-1/8 - 14 24 - 1-3/4 3 1.38 5.00 .25 2-3/4 10 - 14.50 LKM-348 25.50 23.25 54.75 54.00 50.00 16.00 9-1/8 - 14 24 - 1-3/4 3 1.38 5.00 .25 2-3/4 10 - 14.50

NOTES: 1.) Use certified drawing dimensions only for final layouts.

2.) DXF and IGES files available upon request.

3.) Dimensions subject to change without notice.

4.) Consult factory or refer to application information when selecting units.

43 I N D U S T R I A L C L U T C H P R O D U C T S

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OPERATIONAL DATA

tatic Dynamic

orque @ Torque @ Weight Weight Total WR

LKM 125 PSIG 125 PSIG Outer Inner Weight Outer Inner Speed

Model (lb.-in.) (lb.-in.) (lbs.) (lbs.) (lbs.) (lb.-ft.2) (lb.-ft.2) (RPM)

LKM-213 94,600 82,000 155 65 220 50 7 2100 LKM-313 142,000 123,000 220 90 310 70 9 2100

LKM-218 200,000 173,333 440 135 575 255 24 1600

KM-318 300,000 260,000 480 200 680 284 35 1600

LKM-221 382,000 331,000 430 200 630 320 50 1400

KM-321 572,000 445,733 525 285 810 396 71 1400

KM-225 510,000 442,000 730 360 1,090 775 110 1200

KM-325 765,000 663,000 850 451 1,301 836 158 1200

KM-230 1,000,000 866,666 1,095 475 1,570 1,456 222 1000

KM-330 1,500,000 1,300,000 1,290 710 2,000 1,894 320 1000

KM-235 1,455,000 1,261,000 1,925 675 2,600 3,091 472 850

KM-335 2,183,000 1,892,000 2,088 1,012 3,100 4,580 720 850

KM-242 2,716,000 2,354,000 2,770 1,098 3,868 7,495 990 700

KM-342 4,074,600 3,531,320 3,305 1,565 4,870 9,148 1,458 700

KM-248 2,466,600 3,004,386 3,942 1,535 5,477 13,048 1,752 650

KM-348 5,200,000 4,506,666 4,721 2,205 6,926 15,989 2,584 650

SELECTION CHART – Marine Engine Horsepower (S.F. 2.0 @ 125 PSIG)

Model LKM

aximum

Clutch

RPM

250 500 750 1000 1250 1500 1750 2000 2500 3000 3500 4000 4500 5000 6000 7000 8000 9000 10000

50 318

200 218 221

250

300

350

400 213 218

450 213

500 213

550 213

600 213

650 213

700 213 213

750 213 213

800 213 213

850 213 213

900 213 213

1000 213 213 213

1100 213 213 213

1200 213 213 213

1400 213 213 213 213

1600 213 213 213 213

1800 213 213 213 213 213 313 313 313

2000 213 213 213 213 213 213 313 313 –––––––––––

321 325 225 230 235 235 242 242 248 248

321 325 225 230 225 225 242 242 248 248

313 318 218 221 230 230 225 225 242 242 242 248

313 318 218 221 225 230 230 235 235 242 242 242 248 248

313 218 221 225 230 230 235 235 235 242 242 242 248 248

221 321

221

318

218

318 221 225 225 230 235 235 235 242 242 248 248 248

313 318 318 218 221 221 225 225 230 235 235 235 242 242 248

313

218

218 221 225 230 230 235 235 235 242 242 242 313

218

218 221 221 225 225 230 235 235 235 242 242 242 313

218

218 221 221 225 225 230 230 235 235 242 242 242 313

218 218

218 221 221 225 225 230 230 235 235 242 242 242

313 218 221 221 225 230 230 235 235 235 242 242

313 218 221 221 221 225 225 230 230 230 235 235

313 218 221 221 225 225 230 230 235 235 235

313 218 221 221 221 225 230 230 230 235 235 235

313 313 218 218 221 221 221 225 225 230 230

330 330

230 230

325 325

321

221

318

318 318

218

218 218

313 218 221 221 225 225 230 230

313 218 221 221 225 225

313 313 218 218 221 221 221 225 225

325 325

321

321 321

221

221 221

221

221 221

318 318

318 318 318

318 318

318 318 318

218

218 218

218 218 218

218 218

313 313 218 218 221 221

313 313 313 218 218 218

335 335

330 330 335 335

330 330 335 335 335

230

330 330

230

325 325

321

321 321

221

221 221

318 318

218 218

230

325

230 230

325

321

325 325

225

321

321 321 325 325

321

321 321 325 325 325

221

321 321

221

221 221

318 318

318 318 318

318 318

218 218 318 318 ––––––––

–––––––––––

342 342

242 242

330

330 330 330 335 335 335

330 330 330 335 335

230 230

230

325

230 230

325 325

321

321 321

221

221 221 321 321 321 ––––

42 348 348 ––––

342 342

242 242

335 335 335

330 330 330 335 335

330 330 330 335 335 335

230 230

230 230 230

230 230

325 325

325 325 325

325 325

321

321 321 325 ––––

321 321

348 348 348 ––

342

242

330 330

330 330 335 335 335

330 330 330 335 335

230 230

230

230 230 330 330 330

325 325

321 325 325 –––

342 342 348 348

342 342

242

330

330 330

330 330 330

230 –––

342 348

342 342

342 342 342

242 242

335 335 335

342

242 242

242

335 335

335

330

120001400016000 1800020000

–––– 150

–

––––– 200

––––– 250

348 –––– 300

342 348 ––– 350

342 348 348 –– 400

342

342 348 348 – 450

248 342

248 248 342 342

248 248

242

335 242

335 –––– 750

335 –––– 800

––––– 850

––––– 900

–––––1000

–––––1100

–––––1200

–––––1400

–––––1600

–––––1800

–––––2000

342

342 342 248 248

242 242 342 342 700

342 348 500

342 348 348 550

342 348 600

342 342 650

Clutch

RPM

I N D U S T R I A L C L U T C H P R O D U C T S 44

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Model LKM

Tact = Actual Static Capacity = Cat. Stat. Rating x

Supply Press

Rated Press

Tact = 510000 x = 612000 LBIN

150

125

Actual Serv. Fact. = = = 2.91

Tact

Working Torq

612000 210083

Operating Pressure =

125 x Reqd. Serv. Fact. x Work Torq

Cat. Stat. Torq. Rating

Operating Pressure = = 103 PSIG

125 x 2.0 x 210083

510000

Working Torque = = = 210083 LBIN

HP x 63025

RPM

Minimum Static Torque = Work Torque x Service Factor

= 210083 x 2.5 = 525208 LBIN

3000 x 63025

900

Minimum Catalogue Rating = Static Torque Reqd x

Rated Press

Supply Press

Minimum Catalogue Rating = 525208 x = 437674 LBIN

125

150

LKM Marine Clutch Application Information

The selection chart on the previous page is suitable for forward/reverse main propulsion service at 125 PSI actuation.

For controllable pitch propellers, dredge pumps, winches, and fire pumps use the following service factors.

Service

Machinery Factor

Main Propulsion 1.8 Cont. Pitch Prop.

Winches, Centrifugal 1.65 Fire Pumps

Centrifugal Dredge Pumps 2.5

Main Propulsion Continuous Consult Slip from Engine Idle Factory

Example: Centrifugal dredge pump Disconnect clutch application.

The allowable speed for the Model LKM-225-B is 1200 RPM

nd exceeds the operating speed of 900 RPM. The selection

a is appropriate from a torque and speed standpoint.

Dredge pumps can draw extraneous matter into the pump which may suddenly stall the pump impeller. This places a huge shock on the drive system and the clutch is called upon to act as a fuse in these instances. A review of the magnitude of the actual applied service factor is always required to be certain the drive system components can withstand these overloads. It may be necessary to reduce the clutch service factor which increases the likelihood of clutch damage but saves a more costly drive system repair.

The preferred way to reduce the service factor is to adjust the operating air pressure accordingly and maintain the clutch size as originally selected.

The following procedure may be used to calculate the air pressure required for any desired service factor. In this example, the recommended service factor was 2.5. We selected a Model LKM-225-B clutch since it was the closest unit that met or exceeded the calculated torque requirement of 437,674 LB-IN. Note that the actual service factor is 2.91.

IInnppuutt PPaarraammeetteerrs

The engine is rated 3000 HP and the shaft the clutch is to be mounted on is rotating at 900 RPM. The available air pressure is 150 PSIG.

The Model LKM-225-B (rated at 510,000 LB-IN) is selected from the static torque column shown in the operational data chart on the previous page. This unit is the nearest size that meets or exceeds the value of 437,674 LB-IN required.

If, by way of example, it was decided that a service factor of 2.0 was required, the supply air pressure should be set at 103 PSI.

To summarize, a Model LKM-225-B operating at 103 PSIG will provide a 2.0 service factor for this application.

45 I N D U S T R I A L C L U T C H P R O D U C T S