OP-769 16" Three Gun Turrets Part 2 - Personal Page of GENE ...

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OP 769 16 INCH THREE GU N TURRETS and 16.5 feet above the axes of the r ollers of the r olle r path. Turret structural supports for the lugs are spaced to locate the s lides and their guns as follows: The axis of the center gun bore is on the turret cent erline. The axes of the right and left gun bores are parallel to that of the center gun and are each spaced 122 inches from it. Components. The main component of each s lide is a large steel for ging with integral trunnions that rest in the deck lug bearings. Attached to this forging is a hydraulic-type r ecoil brake, a hydropneu matic -type counterrecoil system, and the r ear end brackets. other parts attached to the s lide structure are the loader's platform, a cylindrical gun cover, the upper and lower shield plates 1 a yoke locking device, and a slide securing mecnanism. Design features The deck lugs are identical radial roller bearing assemblies, mounted in a bearing block at the top of the gun girder. Heavy caps, which bolt to the gun girder bearing blocks, prevent vertical displacement of the deck lug bearings. The bearings are secured against hor izontal displacement by the rigidity of the gun girder weldment, and by bea ring r etainers that provide nonadjustable spacing of the bearings of each lug. The bearing r etainer design ties the two trunnion bearings together through the integral structure of the s lide and its t runnions. Design differences The three deck lug ass emblies of a turret are virtually identical. The two deck lugs for the out board slides differ in that the outer bearing blocks 4-2 YOK E BALANCING WEIGHTS DEPRESSION BU FFER DIFFERENTIAL CY LIND ER extend further forward than do the inner bearing blocks. This is necess ary to provide for the difference in shape between the str aight , flat turret face plate and the arulUlar gun girder , which forms the outer structural bulkhead within the barbette. In addition, the flat-plate thrust bearings of the outer bearing blocks are r otated to the r ear and upward in their ass embly pOSitions. Both the bearing blocks and bearing assemblies of the deck lug for the center slide are identical. Access arrangements Access to the deck lug bearings 1s provided for by parallel divisional bulkheads that are formed by the gun girder boxes, and by tur r et subdivision bulkheads. The two outer trunnion bearings are accessible through the sight st ation compartments . The remaining t runnion bearings are accessible through the space between the parallel divisional bulkheads . These spaces may be reached fr om the electric deck. Deck lug DETAIL DESCRIPTION The thr ee deck lugs in each tur ret are mounted in a transverse row within the gun house structure at the front of the turret. Each deck lug consists of two trunnion bearings. The common axis for all six t runnion bearings forms a straight line in the forward upper part of the turret gun girder weldments. Each deck lug (fig. 4-3) is composed of two radial r oller bear ing assemblies and two flat thr ust plate bearings ar ranged with a bearing block and bear ing for each trunnion on either SLIDE YOKE ROD UPPER SH I ELD PLATE GUN TRUNNI ON GUN COVER Figure 4-2. 16 -inch Gun :MIt 7 Mod 0 and Slide :MIt 6 Mod 0, General Arr angement, Sectional View GUN WIPI NG RING
side of the gun slide . The deck lugs are rigidly secured beneath heavy caps that are bolted to the bearing blocks of the gun girder weldment. Design features. The turret structural design for gun girders and deck lug seats ties the trunnion bearings together without the use of transverse tie rods. The radial t runnion bearings are of frictionless des ign. Their rings, r ollers, and cages are of noncorrosive materials or are chromium plated. All elements of the six bearing assemblies are fully enclosed and sealed with lubricant retaining devices. Components. Each trunnion bearing of the deck lug IS an asseDibly of the following parts: Radial r oller bearing Thrust plate Bearing r etaine r Outer bearing s eat Cover plate T runnion bearing assembly (fig. 4-4). Radial roller bearing. The radial r oller bearing unit of each deCk lug consists of inner and outer rings, a two-piece bronze cage, 24 cylindrical steel rollers, and 24 cage rivets. Each assembled bearing is 30.0 inches in oute r diameter, 5.8 inches wide across the inner r ing, and the r oller axes form a circular path 25. 00 inches in diamete r . The rollers are solid t rue cylinder s ; each is 3.5 inches long and 2,5 inches in diameter. They are made of special roller bearing steel and a re chromium plated. The r ollers are equally spaced, loosely fitted in the recesses of the bronze cage, and r etained by the riveted assemblage GREASE MANIFOLD BLOCK CAP OUTER BEARING SEAT GREASE PLUG COVER PLATE BEARING CAG E INNER RING BEARING RETAINER DRAIN PLUG TH RUST PLATE TRUNN ION BLOCK OUTER RING Figure 4-3. Deck Lug Mit 7 Mod 0, Gun Mk 7 Mod 0, and Slide Mk 6 Mod 0, Sectional View GREASE MAN IFO LD BLOC K CAP GREASE PLUG GUN GIRDER WELDMENT THRUST PLATE SLIDES OUTER BEARIN G SEAT OUTER RING SLIDE TRU NNION F igure 4-4. Deck Lug and Trunnion Baa·ring Assembly, General Ar rangement of that unit. The inne r and outer rings are special steel, precision ground to provide concentr ic cylindrical races for the rollers. The inner ring seating area is a 3-degree taper ed bor e that provides a fixed wedged s eat on a matching collar of the r etainer. The outer ring is a lso fixed (cannot r otate) in its seat and is described in a following paragraph. 'thrust plate. The bronze thrust plate is secured by four bolts on the inner s ide of each gun trunnion block. Centered beneath the t runnion, the plate forms a 120-degree thrust bearing lubricated thrust s urface for the s ide face of the gun s lide. The plate has a system of radial grease grooves to distribut e lubricant from four grease fittings. With the two bearing plate surfaces parallel to the s ide face of the slide, the thrust clearance between the s lide and each plate 1s 0.002 inch. The thrust bearing and bearing block design includes provision for maintaining this thrust clearance. Excessive s lide thrust clear ance, caused by a gun girder spread, can be corrected by installing oversize thrust plat es. The installation is made without disturbing the radial bearing assemblies. The bearing block seats for the thrus t plates are milled to pe rmit undersized plates to be dropped and new plates to be raised and bolted. This operation c an be perfor med in the limited space beneath the slide. 4-3
Page 1 and 2: CHAPTER 1 - GENERAL DESCRIPTION OF
Page 5: Flanged pipe fitting •......•.
Page 9: 12. Wipe the excess oil from the gu
Page 14: 9. Mount the breech opening buffer
Page 24 and 25: OP 769 - 16 INCH T HREE GUN T URRE
Page 26: Always lubricate the gun slide line
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Page 33 and 34: The gun elevating equipments instal
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Page 47 and 48: Roller path and erosion cor r ectio
Page 55 and 56: 4. F orced t o the right by servo p
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OP 769 16 INCH THl EE GUN TURRETS 3
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OP 769 16 INCH THREE GUN TURRETS Lo
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OP 769 16 INCH THREE GUN TURRETS Re
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OP 769 16 INCH THREE GUN TURRETS To
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8. Operate t he handwheels slowly s
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1. Move the gun order signal s lowl
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OP 769 16 INCH THREE GUN T URRETS T
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OP 769 16 INCH THREE GUN TURRETS Th
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OP 76\J 16 I NCH T HREE G UN TURRET
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Starting Perform the following oper
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O P 7G 16 INCH THREE GUN TURRETS 4.
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OP 769 16 INCH THREE GUN TURRETS 2.
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OP 769 To adjust the main relief va
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