K I N G S B U R Y B E A R I N G S Y S T E M S

CH&C

TABLE OF CONTENTS

INTRODUCTION. . . . . . . . . . . . . 3

ADVANTAGES OF KINGSBURYSCH SYSTEM . . . . . . . . . . . . . . . . . . . 4

GENERAL DESCRIPTION . . . . . . . . 6

HOW THE CH LUBRICATION SYSTEM WORKS . . . . . . . . . . . . 8

BEARING SELECTION . . . . . . . . 10

CH BEARING DIMENSIONAL DATA. . . . . . . . . 12

C BEARING DIMENSIONAL DATA. . . . . . . . . 13

PERFORMANCE DATACURVES . . . . . . . . . . . . . . . . . 14

OPTIONS AND INSTRUMENTATION . . . . . . . . 18

The Kingsbury CH Bearing System integrates a fully self-contained, flange-

mounted, horizontal equalizing double thrust bearing with a self-aligning journal

bearing (CH); and a remote, separately mounted journal bearing (C).

At the heart of every CH unit is a self-contained, load-equalizing thrust bearing.

The system eliminates the need for an electric motor/ pump, emergency pump,

accumulator, rundown tank, or other special arrangements for oil lubrication. No

additional motor control system or any electric power is required to circulate the

oil. And since no separate lube system is required, the cost savings are significant.

System lubrication is autonomous, provided by means of a viscosity pump

driven by shaft rotation. This pump consists of the combination of the built-in

mechanical oil circulator and the rotating collar, which draws oil up from the sump

as soon as the shaft begins to rotate. As long as the shaft rotates, pumping action is

achieved. No priming is necessary since the pump inlets are always submerged.

Pumping action is bidirectional and automatically adjusts with shaft rotation.

The pressure and flow generated by this pump force the oil out through

passages in the housing to lubricate both thrust bearings and the internal journal

bearing. The pressure in the thrust cavity then drives the hot oil through the oil

cooler and then back into the oil sump. The fewer the restrictions in the system,

the more the circulator can pump.

Sufficient flow and pressure are developed by the CH unit that it can be

evaluated for supplying oil to a separate, remote journal bearing: for example, the

system prime mover. Please contact your Kingsbury Sales Engineer if you wish to

have the CH lubricate additional equipment.

3

QUALITY STANDARDS:

KINGSBURY, INC. ISO 9001: 2008 Registered

4ADVANTAGES OF KINGSBURYSCH SYSTEM

Only Kingsburys CH BearingSystem integrates: 1) a non-drive-end (NDE) unitwith a double, equalizing thrustbearing, a journal bearing, and anoil circulator within a single

unified housing; and 2) a drive-end (DE) unit with an integraljournal bearing in a second housing of its own. Other designsnecessitate purchasing thrust andjournal bearings separately, and

then still require additional components, like a machinedhousing and external lubricationsystem.

The Kingsbury CH system is integrated, reliable, and saves

CH UNIT

C UNIT

5initial cost. CH bearing usershave seen the savings first hand,reporting that when all is saidand done, the CH costs consider-ably less to install on high-performance pumps. The CH Bearing Systems simple

design has the same reliabilityas a full API lubrication system. The CH further demonstrates its superioritythrough its low maintenance,reduced weight and smaller footprint.

CH SystemKingsburys complete CH system includes two separatecomponents: the CH unit whichincludes thrust and journal bear-ings and provides the lubrication,and the C unit, with a remotely mounted journal bearing.

CH UnitThrust BearingsKingsbury utilizes equalizingthrust bearings which conform to API 610 requirements. TheKingsbury principle and theworkings of the equalizing thrustbearing are fully described in ourEQH-1 catalog.

Journal Bearing

The CH unit contains an integral, self-aligning journalbearing designed to accuratelylocate the shaft under all loadingconditions. Journal bearing diam-eters are based on the machinesshaft requirements. Each housingwill accommodate a choice ofthree standard journal bearingdiameters listed on pages 12through 15. If the shaft cannot bemachined to one of the standarddiameters, Kingsbury offers at amodest fee the option of a custom-designed journal bearingto accommodate the shaft.

C UnitAlso available are separate self-aligning journal bearings. Thesemodel C bearings are assigned

designations similar to the CHunit. Typically at the inboard(drive) end of the machine, theyare generally of the same designand size as the journal in the CHunit. These bearings depend onthe CH bearing for lubrication.C bearing units may be purchased separately, but requirean external lubrication system if aCH unit is not incorporated. Toensure proper lubrication, thepiping to and from these bearingsshould conform to Kingsburysguidelines as described underOil Piping, page 10.

Oil CirculatorThe oil circulator is the heart ofKingsburys CH system. Workingin concert with the thrust collar toform a self-priming viscositypump, it provides lubrication tothe entire system by means ofshaft rotation. As long as the shaftis rotating, pressurized oil is avail-able, even during power outages orreverse rotation. It may even pro-vide sufficient volume and pressureto lubricate additional, externallymounted equipment such asmotor bearings or couplings.Please consult one of Kingsburyssales engineers for an evaluation ofyour application.

GENERAL DESCRIPTION

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7JOURNAL BEARING

LABYRINTH END SEAL

OIL SEAL RING

THRUST BEARING (OUTBOARD SHOWN,INBOARD BEARINGREMOVED FOR CLARITY)

CoolingStandard oil cooling is providedby means of a plate-style heatexchanger mounted directly onthe CH unit, and requires freshwater typically supplied at a temperature of 30 C (85 F).Standard coolers can be providedto suit any speed within the catalogs published load andspeed ranges. Shell-and-tube heatexchangers are also available for applications with special coolants

such as sea water, as is the option of forced-air cooling. See page 11for additional information on oilcooling.

Standard Sizes/CapacitiesStandard units listed in this catalogcan accommodate thrust loads upto 180 kN (40,000 lbf), shaft sizesup to 190 mm (7.50), and slidingvelocities up to 65 m/s (215 ft/sec)at the mean diameter of the thrustcollar.

Custom DesignsThe self-lubricating system hasbeen incorporated successfully inapplications larger than those listed in this catalog, includingpedestal-mounted housings formarine dredge pumps. Pleaseconsult our Sales Department for information on sizes and/orequipment not listed here.

OIL CIRCULATOR

HOW THE CH BEARING LUBRICATION SYSTEM WORKS

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As the shaft begins to rotate, oil is drawnfrom the reservoir through a port in the oil circulator.

Cool oil travels around both thrust bearings as well a channel toward theintegral journal bearing.

Pressurized oil from the central passage of the circulator enters the thrust bearings to be drawn across the shoes.

At the same time oil passes through the thrust bearings, pressurized oilflows around the journal bearing.

To view oil flow animations online, click on an image below. Animations will open in a new tab/window.

9Hot oil from the thrust bearings returns tothe heat exchanger through a standpipe.

As pressurized oil is supplied to the integral journal in the CH unit, it also travels to the journal in the remote C bearing. Hot oil returns to thereservoir by customer-supplied piping.

As pressurized oil is supplied to the integral journal in the CH unit, it also travels to the journal in the remote C bearing. Hot oil returns to thereservoir by customer-supplied piping.

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BEARING SELECTIONGuidelines for assigning loadcapacities take several factorsinto consideration, includingtheoretical analyses, our fieldexperience, and test results.Thrust bearing rated loads (page14 or 15) have been calculatedbased on the following designconsiderations: on low-speedapplications, the limiting factoris film thickness; on high-speedapplications, the limiting factoris shoe temperature.All the ratings published in thiscatalog have a factor of safety ofat least two.This complies with standardindustry specifications, includingthose of the American PetroleumInstitute.

For most typical applications,the determining factor in selectinga CH unit size is the requiredshaft diameter.

1. Using the shaft size limitsindicated in our catalog draw-ings, determine the smallest CHunit that accommodates yourshaft size.

2. Next, check the bearingthrust capacities versus requiredload demands. The selected unitshould be capable of handling themaximum thrust load. Use thefollowing figures as a guide:

See page 14 or 15 for the Thrust Bearing Rated Load curve for ISO VG 46. See page 16 or 17 for theThrust Bearings Friction Loss curve.3. Finally, confirm the

journal load capacity from

page 16 or 18.Example: Given a thrust load

of 20,000 N (4500 lbsf ), shaftdiameter at the journal of 80mm (3.15), a speed of 3600rpm, and a journal load of 8000N (1800 lbsf ).

Selection: From the tables onpages 12-13, select the smallestunit size with the correct shaftdiameter. The smallest unit capa-ble of handling the given shaft isa CH-1. Next, refer to ThrustBearing Rated Load curve, page14 or 15, to confirm that theCH-1 is acceptable. Note that itis more than adequate for thegiven thrust load. Finally, verifyfrom Journal Bearing RatedLoad curve, page 14 or 15, thatthe journal size is adequate forthe specified load. Therefore, aCH-1 will be the best solution for the given data.

Oil PipingOil piping between the remote Cand the CH is not supplied by

Kingsbury. Piping should bearranged with the C bearingreturn pipe going straight downfar enough to give a continuousrise at a slope of between 5 and8 to the CH unit. As the headpressure on the returning oil isslight, the return pipe must beadequately sized. Please refer toSheet 1 of the C unit drawing(link on page 13) to determinethe proper size. All oil pipingmust be installed well below theoil level. Trace heating on pipesand an oil heater in the CHsump are recommended if ambi-ent temperatures are likely to gobelow 10 C (50 F) at startup.

Oil CoolingThe integral heat exchangersunique design combines a highthermal efficiency with a mini-mal pressure drop. Optionalarrangements include an allbrass/bronze construction forseawater-cooling applications,and an all-ASTM A300-series

stainless-steel construction. Forapplications in which no coolingwater is available, a forced-air oilcooler can be provided. Only thestandard cooler and the all-brasscoolers can be mounted directlyto the CH unit. All other optionsmust be remotely mounted asclose as possible to the CH bear-ing. When the cooling water isthermostatically controlled, theflow rate must be set to maintainthe sump at 50 C (120 F) orthe temperature specified.

Oil SelectionThe charts and tables in this cata-log are based on an oil viscositygrade of ISO VG 46. However,other oil viscosity grades can beused. Their use is based largely onspeed and load considerations. Forexample, ISO VG 32 is better suited for light loads and/or highspeeds, whereas ISO VG 68should be used if the loads arehigher and the speeds slower. Ifunsure of the best oil viscosity foryour application, please consultKingsbury for a recommendation.

Since the Kingsbury CHBearing System is entirely self-con-tained, continuous filtration is notrequired. Initial oil fill is to be fil-tered to 10 microns or better. SeeTable on pages 12 to 13 for CHhousing oil sump capacities. Pleaseadd a sufficient amount of oil tothese capacities to allow for theapplications piping.

Caution: The piping canusually accommodate more oilthan the sump itself.

Flange OptionsKingsburys CH and C units aredesigned to give the customerconsiderable flexibility whenselecting the type of flange forthe application. The flange isdesigned and machined separatelyfrom the housing, and can beeither a half or full circle, withthe bolt circle of your choice. Seeindividual drawings for moredetails on flange selection.

Shaft and Collar DetailsTypically, Kingsbury will supplya separate thrust collar. We rec-ommend that the collars have asliding fit (ANSI Class RC2) onthe shaft. User must provide theshaft nut, nut locking device, and key. Details of the arrangement

are shown on the individualdrawings. Details of the arrangement are on page 13.

PaintAll units come painted on theexterior with a gray metal primerand the internal unmachined oil-containing surfaces painted withan insulating enamel. Attachedcoolers come painted with a styre-nated alkyd enamel. All exteriorsurfaces that are painted can bere-coated.

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12

CH BEARINGDIMENSIONAL DATA

CH Bearing Size 1 PDF60 mm - 70 mm - 80 mm

CH Bearing Size 2 PDF80 mm - 95 mm - 110 mm

CH Bearing Size 3 PDF110 mm - 130 mm - 150 mm

CH Bearing Size 4 PDF150 mm - 170 mm - 190 mm

To view detailed dimension drawings, visithttp://www.kingsbury.com/file_library.shtmlor click on a PDF link below.

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C BEARINGDIMENSIONAL DATA

A

A

B

B

35.0 35.0

90.0

45.0

12X HOLES FULL FLANGE MOUNTING THRU HOLE EQUALLY SPACED(SEE TABLE B)

EYEBOLT FOR HANDLING

152.0 [5.98]

MOUNTING HOLE BOLT CIRCLE(SEE TABLE B)

15

30 12X

C Bearing 1 PDF 60 mm - 70 mm - 80 mm

C Bearing 2 PDF80 mm - 95 mm - 110 mm

C Bearing 3 PDF110 mm - 130 mm - 150 mm

C Bearing 4 PDF150 mm - 170 mm - 190 mm

To view detailed dimension drawings, visithttp://www.kingsbury.com/file_library.shtmlor click on a PDF link below.

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RATED LOAD FOR CH SYSTEM JOURNAL BEARINGS (METRIC)

RATED LOAD FOR CH SYSTEM THRUST BEARINGS (METRIC)

Based on ISO VG 46 oil at 49C sump temperature at the journal mean diameter

Based on ISO VG 46 oil at 49C sump temperature

PERFORMANCE DATA CURVES

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RATED LOAD FOR CH SYSTEM JOURNAL BEARINGS (AMERICAN STANDARD)

RATED LOAD FOR CH SYSTEM THRUST BEARINGS (AMERICAN STANDARD)

Based on ISO VG 46 oil at 120F sump temperature at the journal mean diameter

Based on ISO VG 46 oil at 120F sump temperature

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RECOMMENDED COOLING WATER FLOW FOR CH SYSTEM (METRIC)

TOTAL FRICTIONAL LOSS FOR CH SYSTEM (METRIC)

Based on rated loads, standard cooler, ISO VG 46 oil at 49C inlet, 27C cooling water

Based on rated thrust and journal loads, ISO VG 46 oil, 49C sump temperature

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RECOMMENDED COOLING WATER FLOW FOR CH SYSTEM (AMERICAN STANDARD)

TOTAL FRICTIONAL LOSS FOR CH SYSTEM (AMERICAN STANDARD)

Based on rated loads, standard cooler, ISO VG 46 oil at 120F inlet, 80F cooling water

Based on rated thrust and journal loads, ISO VG 46 oil, 120F sump temperature

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OPTIONS AND INSTRUMENTATION

BASIC MODELStandard CH and C units aresupplied with the option of a halfor full flange, a flat or spigotmount, labyrinth or Inpro endseals, as well as provisions fortemperature detectors, axial andradial vibration probes, and lift-ing bolts. Each housing configu-ration allows for three standardshaft diameters, which can beadapted to accommodate specialcustomer requirements if neces-sary. Please refer to the drawingson pages 12 to 13 for all stan-dardized options.

INSTRUMENTATIONInstrumentation taps can be provided for temperature sensing,vibration monitoring, and phasereference monitoring. Please seethe callouts indicated on the pho-tos for tap options and locations.Kingsbury can also provideinstrumentation, if requested.

RADIAL VIBRATIONTAP (ONE OF TWO)

THRUST BEARING RTD/THERMOCOUPLE TAPS

OPTIONAL HEATERTAP (NOT SHOWN)

AXIAL (THRUST)PROBE TAP(S)

STANDARDOIL COOLER

OIL SUMPTHERMOWELLTAP

JOURNAL BEARINGOIL RETURN

TIMING AND PHASEREFERENCE TAP

RADIALVIBRATIONPROBE TAP

BEARING ISOLATOR

HALFMOUNTINGFLANGESHOWN(FULL FLANGEOPTIONAL)

CH UNIT

C UNIT

RTD/THERMOCOUPLE TAP (IN BOTTOM, NOT SHOWN

10385 Drummond RoadPhiladelphia, PA 19154 USA Telephone: +1 215-824-4000Fax: +1 215-824-4999www.kingsbury.com