Some standard content:
China State Shipbuilding Corporation Department Standard
CB1072.2-88
Marine Diesel Engine Assembly Man-hour Quota
B&W Diesel Engine
198808-17 Issued
China State Shipbuilding Corporation Issued
1988-12-01 Implementation
Subject Content
China State Shipbuilding Corporation Department Standard
B&W Diesel Engine
Marine Diesel Engine Assembly Man-hour Quota
This standard specifies the man-hour quota for assembly and final assembly of typical parts of the B&W series low-speed diesel engines. 2 General Finance
CB1072.2-88
Classification number, U02
2.1 This standard labor time quota is given under typical conditions, based on a five-cylinder engine. When used, it can be modified according to the actual difficulty and the increase or decrease in the number of cylinders.
2.2 The labor time quota specified in this standard includes: operation time, work place arrangement time, rest and physiological needs time, preparation and end time.
2.3 The technical level specified in this standard is determined in accordance with the "Technical Level Standard for Shipbuilding Industry Workers" issued by China Shipbuilding Industry Corporation in 1983.
3 Engine base
3.1 The structural type is shown in Figure 1.
1-upper plane; 2-main bearing cover; 3-lower plane; 4-filter screen, 5-cover plate, 6-cover plate; 7-main bearing lining; 8-main bearing burst bolt 3.2 Operation content;
a. Remove burrs on cover plate, filter screen, key machine base and other parts, tap back threads, clean and install machine base cover plate, filter screen, flange, etc., b. Positioning and installation; hoist the machine base on the test bench and adjust the positioning, check the horizontality of the upper plane, grind the confidential adjustment pad, tighten the base bolts, and submit for acceptance
c. Main bearing bolts; clean the main bearing connecting bolts and screw holes, install and tighten on the machine base, China Shipbuilding Industry Corporation approved on August 17, 1888, implemented on December 1, 1988
CB1072.2-88
d. Main bearing; measure the depth of the main bearing base hole, the actual size of each main journal of the crankshaft, check the center of the main bearing seat hole, select the main bearing bushing and install it in the main bearing hole and main bearing cover, check the contact surface with blue oil coloring; measure the gap between the bushings, select the bushing pads; e. Oil retainer: install the oil retainer, check and adjust the clearance between the oil retainer and the crankshaft; install the front and rear screen covers, drill the reamer pin holes, and install the positioning pins. 3.3 The quota is shown in Table 1.
Cylinder diameter D
Technical level
Cover plate, filter
Positioning, installation
Main bearing bolt
Table 1 is based on a five-cylinder engine. If one cylinder is added or subtracted, the working hours will increase or decrease by 10%. 4 Frame
4.1 See Figure 2 for the structural type. www.bzxz.net
Main bearing
Oil retaining ring
1-Frame exhaust side door, 2-stud bolt; 3-screw width; 4-Frame; 5-explosion-proof valve; 6-cover, 7 guide plate; 8 bolt; 9-adjusting pad; 10-explosion bolt, 11-spring pad; 12-walkway bracket, 13-frame fuel side door, 14~end cover 4.2 Operation content;
a, tapping, cleaning, chain repairing frame parts burr , national tapping thread, clean the dimensions of each part of the measuring plate, 2
CB1072.2—88
b, positioning, pre-installation; hoist the frame on the machine base, check whether there is any gap in the contact surface, adjust the positioning and tighten, drill and ream the positioning screw holes, remove the components after pre-installation, apply oil for maintenance, and finally install, c. Guide slide; measure and trim the frame bottom plate surface where the guide slide is installed, check the verticality and longitudinal parallelism, select the guide slide, tap, tighten Stud bolts, hoist the guide slide, install the guide slide adjustment pads, upper and lower spherical pads, and distance sleeves; position the guide slide in the weaving direction and transverse direction according to the technical requirements, check the weaving and transverse position tolerance value, tighten the hydraulic pump, recalibrate the size, submit for acceptance, drill and hinge the guide slide positioning screw holes, and install the positioning channel bolts;
d, door and cover plate: tap the door frames on both sides of the frame, install stud bolts; decompose and wash the explosion-proof valve and install it on the explosion-proof cover, and perform the door opening pressure test; install the frame's two-sided door cover and explosion-proof door cover, position and tighten the door hinge device, drill and hinge the positioning pin holes, and install the pins; install the frame transmission box door, cover plate and accessories
e, bracket, grid; install the frame walkway bracket and grid cabinet; f, install the frame; hoist the frame on the machine, recalibrate the installation position, install the positioning bolts, tighten all bolts and submit for acceptance, 9. Check the levelness; use the measuring plate to check the levelness of the plane on the frame, and grind the local deviation. 4.3 The working hours are shown in Table 2.
Cylinder diameter D Tapping, submerged positioning, pre-installed guide plate mm
Technical level
Gate, benefit plate bracket, grille installation rack inspection levelness Total
4.4 Table 2 is based on a five-cylinder engine. If one cylinder is added or subtracted, the working hours will increase or decrease by 20%. 5 Cylinder block
5.1 The structural type is shown in Figure 3.
CB1072.2—88
1-end cover, 2-connecting cylinder bolts; 3-cooling water ban and air ring sleeve assembly; 4-single cylinder body; 5-connecting bolts 5.2 Operation content;
a, watertight test: repair the burrs of the cylinder body (single body), tap, install the screw fog, and conduct watertight pressure test according to the process requirements) b. plate, stud bolts; clean the screw holes and stud bolts, make cover plate gaskets, install cover plate and stud bolts; c. Connecting cylinder head bolts; install threaded sleeves, clean the connecting cylinder head bolts and cylinder body blasting holes, screw the bolts into the cylinder body according to the requirements of the drawings, check the verticality, and apply filler to the root, d, connect the cylinder body; check the parallelism, verticality and concentricity of the cylinder body and connect the single cylinder Adjust the connection and tighten the cylinder body, intermediate body, end cover and sprocket box according to the technical requirements, drill and hinge the positioning screw holes, and install the fastening bolts; e. Assembly, assemble the cylinder sleeve and water ring, press the cylinder sleeve assembly into the cylinder body, install the lubricating oil check pottery and cylinder body accessories, hoist the cylinder assembly, prepare the water-tightness tools, perform the watertight pressure test of the cylinder body, remove the cylinder head and water pumping tools after submission for acceptance, pull the wire inside the cylinder sleeve, check the verticality of the material, install the telescopic pipe and protective pipe, apply oil and maintain for final assembly, f, pre-installation; adjust the position of the cylinder body on the frame and tighten it, drill and hinge the positioning pin holes, remove the cylinder body for final assembly, 9. Brackets and grids, install the cylinder body platform bracket and grid; h, installation; clean the frame and the red rest calibration surface, hoist the cylinder body on the frame, re-calibrate the installation size, install the elastic pin, and tighten the burst bolt. 5.3 The labor hour quota is shown in Table 3.
Cylinder diameter D
Technical level
Double connection cylinder head
Cover plate,
Cylinder block
5.4 Table 3 is based on a five-cylinder engine. If one cylinder is added or subtracted, the working hours will increase by 20%. 6 Crankshaft
6.1 See Figure 4 for the structural type.
6.2 Operation content:
1072.2—88
1-bolt, 2-front frequency adjustment wheel; 3-crankshaft; 4-sprocket, 5-flywheel.a, remove the oil seal: remove the oil seal of the crankshaft, clean and check the main journal, crank journal size, oil and maintain it for installation; 6. Sprocket; clean the sprocket parts, adjust and install the sprocket and accessories on the crankshaft, and submit for acceptance, c. Front frequency adjustment wheel, clean the front frequency adjustment wheel parts, adjust and install the front frequency adjustment wheel and accessories on the crankshaft, d. Flywheel; punch the non-machined surface of the flywheel, adjust the crankshaft to install the flywheel according to the technical requirements, check the concentricity, machine the tightening screw holes, tighten the tightening bolts, and install the accessories;
e. Shock absorber; clean the oil hole of the oil well, install the shock absorber lower shell, check and adjust the radial gap between the crankshaft main journal and the shell, and the axial clearance of the piston in the shell groove. After the crankshaft is installed, drill the pin hole in the lower body and install the positioning pin. When the crankshaft is finally installed, install the shock absorber seal ring and spring and its upper f. Positioning, installation, pressing the main bearing lower bush, hoisting the crankshaft into the machine base, coloring the main bearing bush with blue oil, scraping and trimming, measuring the crankshaft arm distance, thrust journal bridge gauge, main journal, crankpin concentricity, transmission gear radial runout, checking the crankshaft axial clearance, determining the thickness of the thrust block tray, hoisting the crankshaft, submitting for acceptance, cleaning the main bearing bush and main journal, installing the crankshaft and upper bearing cover, preliminary measuring and adjusting the main bearing clearance.
6.3 The working hours are shown in Table 4.
Cylinder diameter D
Technical level
Remove oil seal
Front frequency adjustment wheel
Wheel shock absorber positioning, installation
CB1072,288
6.4 Table 4 is based on a five-cylinder engine. If one cylinder is added or subtracted, the working hours will increase or decrease by 10%. 7 Turning machine
7.1 See Figure 5 for the structural type.
1- shaft; 2- transmission shaft; 3- flywheel; 4~ clutch, 5 bracket 7.2 Operation content;
a. Test assembly, clean up the parts, install the turning machine bracket and double-headed explosion bolt, test assembly the turning machine, adjust the turning machine center height and tooth side clearance, tighten the turning machine foot connection bolts, install the clutch, connect the power supply for test operation, b.Installation: hoist the turning machine onto the turning machine bracket, check the turning machine center height, check the tooth side clearance, position and tighten, drill the hinge pin
hole, and install the positioning pin.
Working hours quota see Table 5.
Cylinder diameter D
Technical level
Chain transmission device
8.1Structural type see Figure 6.
31072,288
1-chain, 2-sprocket expansion mechanism; 3-camshaft drive wheel, 4-tracking; 5-bracket, 6-intermediate shaft, 7-intermediate sprocket; 8-balance weight 8,2 Operation content:
a, sprocket tensioning device, clean parts and repair chain burrs, measure dimensions, install sprocket shaft sleeve according to process requirements, drill and tap the matching parts between sprocket and drive sleeve, screw in screws, install sprocket shaft, front and rear thrust flanges, adjust and check the clearance, assemble key wheel tensioning device; b, balance sprocket; install balance sprocket according to technical requirements, assemble balance sprocket balance weight, c, cam drive wheel, clean sprocket bearing hole, assemble sprocket drive, install sprocket Position the flange, clean and install the bearing flange, recalibrate the installation device, install the drive shaft according to the technical requirements, and assemble the camshaft drive wheel device; d. Install on the machine, install the camshaft drive device, the intermediate transmission wheel device, the sprocket tensioning mechanism, and adjust and check the clearance of each part, clean the chain guide rail and each component, make preliminary adjustments and installations on the machine, adjust and tighten the chain after installation, recalibrate and check that each sprocket and the crankshaft sprocket are in the same plane, and check the clearance of each installation part; e. Install the chain; wash the chain, measure the length, install the chain on the machine according to the technical requirements, adjust the tensioning device, tighten the chain, check the camshaft rotation angle position, and adjust the clearance between the chain and the guide rail; f. Door panels, cover plates: install door panels, cover plates and accessories. 8.3 The working hours are shown in Figure 6.
Cylinder diameter D
Technical level
9 Connecting rod device
Sprocket combustion
Tightening device
9.1 See Figure 7 for the structural type.
CB1072.2—88
Camshaft
Driving wheel
Installation on machine
Installation chain
Door panel, cover panel
1—crosshead bearing liner, 2—cooling oil bay head, 3—end cover, 4—stop plate, 5—bolt: 6—connecting rod: 7—crankpin bearing assembly; 8—crank bearing cover; 9—crankpin bearing village; 10—slider; 11—eliminating plate; 12—crosshead bearing cover; 13→crosshead bearing; 14 crosshead pin 9.2 Operation content
a. 1. Clean the upper and lower end planes of the connecting rod, measure and check the total parallelism
b, assemble the bearings; clean the crosshead bearing and crankpin bearing parts, tighten the bearing screws, select the bearing bushings, install the upper and lower bearings, tighten the hydraulic pump, measure the inner diameter of the bearing, install the crosshead pin, color the crankpin shaft hole with blue oil, check the contact condition, install the thrust washers on both sides of the crosshead bearing, check the clearance, disassemble the crankpin bearing cover; C. Crosshead pin; measure and check the contact plane between the crosshead pin and the piston rod and the crosshead pin. Parallelism of the outer ring of the crosshead pin shaft, measure and check the thickness of the crosshead slider, parallelism of the two planes, select and install the crosshead slider, install the slide bar and adjustment pad, check the verticality; adjust and install the cooling oil elbow on the crosshead pin shaft, drill and ream the positioning pin hole, and drum mark; assemble the crosshead pin assembly, check the bearing clearance and thrust plate clearance, tighten and install the accessories,
d, installation on the machine:, hang the crankpin bearing cover in the crankcase, install the connecting rod assembly, tighten the hydraulic pump, and install the cooling oil elbow and outlet pipe according to the mark number.
9.3 The working hours quota is shown in capsule 7.
Red diameter D
Technical level
Upper and lower end surfaces
CB1012.288
Assemble bearings
Crosshead pin
Table 7 is based on a five-cylinder machine. If one cylinder is added or subtracted, the working hours will increase or decrease by 20%. 10 Piston
10.1 See Figure 8 for the structural type.
Installation on the machine
1-piston head; 2-piston skirt; 3-screw inspection; 4-stop plate; 5-0-ring, 6-bolt; 7-cooling water buttock; 8-piston rod, 9-stuffing box assembly, 10-connecting flange; 11-piston ring; 12-stop plate, 13-explosion bolt 10.2 Operation content;
a, assemble the piston; clean the piston parts, clean the oil chamber, assemble the piston skirt and piston head, piston rod and cooling water pipe, live cold head and live race rod, and install each stop plate;
b, watertight test, prepare pump pressure tools, install the assembled piston and seal pressure test, c. Assemble the assembly: assemble the crosshead assembly and piston assembly according to the technical requirements, check the horizontality and concentricity of the crosshead slider and the piston rod, drill the reamer pin hole, and install the pin;
CB1072,2-88
d, disassemble, Cleaning: disassemble and clean the crosshead assembly and the piston assembly, apply oil and maintain for the general; e. Install the piston; clean the inner wall of the cylinder sleeve and the piston assembly, hoist the piston, check the contact surface clearance between the piston rod and the crosshead pin, tighten the piston rod screw, and measure and adjust the compression space.
f. Piston centering: center the piston-connecting rod device according to the technical requirements, and adjust the front-to-back clearance between the piston head and the cylinder sleeve, the clearance between the slide bar, the clearance between the piston skirt and the cylinder sleeve, the clearance between the guide slide plate, the crosshead shaft and the connecting rod, and the minimum clearance between the connecting rod and the crank arm. After submission for acceptance, remove the live package,
9. Clean the stuffing box; remove the oil seal of the stuffing box, disassemble and clean it for general assembly; h. Final installation: assemble the stuffing box on the piston rod, install the piston ring on the piston head, clean the inner wall of the cylinder sleeve, apply oil, install the piston on the machine, install the piston rod stuffing box, and knock the cylinder number on the piston rod; align and install the flywheel top dead center indicator device. 10.3 The working hour quota is shown in Table 8.
Technical level
Table 8 is based on a five-cylinder engine. If one xenon is added or subtracted, the working hours will increase or decrease by 20%. 10.4
11 Reversing device
11.1 Operation content;
a, cleaning: remove the oil seal of the reversing device, disassemble, clean, assemble, test, b, installation, positioning, installation and tightening of the reversing device according to the requirements of the drawing. 2 The working hours are shown in Table 9.
Padding bacteriaCrosshead pin; measure and check the parallelism between the plane where the crosshead pin shaft and the piston rod contact and the outer ring of the crosshead pin shaft, measure and check the thickness of the crosshead slider and the parallelism of the two planes, select and install the crosshead slider, install the slide bar and adjustment pad, and check the verticality; adjust and install the cooling oil elbow on the crosshead pin shaft, drill and ream the positioning pin hole, and drum-print the mark; assemble the crosshead pin assembly, check the bearing clearance and thrust plate clearance, and install the accessories after tightening,
d, installation on the machine:, hang the crank pin bearing cover in the crankcase, install the connecting rod assembly, tighten the hydraulic pump, and install the cooling oil elbow and outlet pipe according to the marking number.
9.3 The working hour quota is shown in capsule 7.
Red diameter D
Technical grade
Upper and lower end surfaces
CB1012.288
Assembled bearing
Crosshead pin
Table 7 is based on a five-cylinder engine. If one cylinder is added or subtracted, the working hours will increase or decrease by 20%. 10 Piston
10.1 See Figure 8 for the structural type.
Installation on the machine
1-piston head; 2-piston skirt; 3-screw inspection; 4-stop plate; 5-0-ring, 6-bolt; 7-cooling water buttock; 8-piston rod, 9-stuffing box assembly, 10-connecting flange; 11-piston ring; 12-stop plate, 13-explosion bolt 10.2 Operation content;
a, assemble the piston; clean the piston parts, clean the oil chamber, assemble the piston skirt and piston head, piston rod and cooling water pipe, live cold head and live race rod, and install each stop plate;
b, watertight test, prepare pump pressure tools, install the assembled piston and seal pressure test, c. Assemble the assembly: assemble the crosshead assembly and piston assembly according to the technical requirements, check the horizontality and concentricity of the crosshead slider and the piston rod, drill the reamer pin hole, and install the pin;
CB1072,2-88
d, disassemble, Cleaning: disassemble and clean the crosshead assembly and the piston assembly, apply oil and maintain for the general; e. Install the piston; clean the inner wall of the cylinder sleeve and the piston assembly, hoist the piston, check the contact surface clearance between the piston rod and the crosshead pin, tighten the piston rod screw, and measure and adjust the compression space.
f. Piston centering: center the piston-connecting rod device according to the technical requirements, and adjust the front-to-back clearance between the piston head and the cylinder sleeve, the clearance between the slide bar, the clearance between the piston skirt and the cylinder sleeve, the clearance between the guide slide plate, the crosshead shaft and the connecting rod, and the minimum clearance between the connecting rod and the crank arm. After submission for acceptance, remove the live package,
9. Clean the stuffing box; remove the oil seal of the stuffing box, disassemble and clean it for general assembly; h. Final installation: assemble the stuffing box on the piston rod, install the piston ring on the piston head, clean the inner wall of the cylinder sleeve, apply oil, install the piston on the machine, install the piston rod stuffing box, and knock the cylinder number on the piston rod; align and install the flywheel top dead center indicator device. 10.3 The working hour quota is shown in Table 8.
Technical level
Table 8 is based on a five-cylinder engine. If one xenon is added or subtracted, the working hours will increase or decrease by 20%. 10.4
11 Reversing device
11.1 Operation content;
a, cleaning: remove the oil seal of the reversing device, disassemble, clean, assemble, test, b, installation, positioning, installation and tightening of the reversing device according to the requirements of the drawing. 2 The working hours are shown in Table 9.
Padding bacteriaCrosshead pin; measure and check the parallelism between the plane where the crosshead pin shaft and the piston rod contact and the outer ring of the crosshead pin shaft, measure and check the thickness of the crosshead slider and the parallelism of the two planes, select and install the crosshead slider, install the slide bar and adjustment pad, and check the verticality; adjust and install the cooling oil elbow on the crosshead pin shaft, drill and ream the positioning pin hole, and drum-print the mark; assemble the crosshead pin assembly, check the bearing clearance and thrust plate clearance, and install the accessories after tightening,
d, installation on the machine:, hang the crank pin bearing cover in the crankcase, install the connecting rod assembly, tighten the hydraulic pump, and install the cooling oil elbow and outlet pipe according to the marking number.
9.3 The working hour quota is shown in capsule 7.
Red diameter D
Technical grade
Upper and lower end surfaces
CB1012.288
Assembled bearing
Crosshead pin
Table 7 is based on a five-cylinder engine. If one cylinder is added or subtracted, the working hours will increase or decrease by 20%. 10 Piston
10.1 See Figure 8 for the structural type.
Installation on the machine
1-piston head; 2-piston skirt; 3-screw inspection; 4-stop plate; 5-0-ring, 6-bolt; 7-cooling water buttock; 8-piston rod, 9-stuffing box assembly, 10-connecting flange; 11-piston ring; 12-stop plate, 13-explosion bolt 10.2 Operation content;
a, assemble the piston; clean the piston parts, clean the oil chamber, assemble the piston skirt and piston head, piston rod and cooling water pipe, live cold head and live race rod, and install each stop plate;
b, watertight test, prepare pump pressure tools, install the assembled piston and seal pressure test, c. Assemble the assembly: assemble the crosshead assembly and piston assembly according to the technical requirements, check the horizontality and concentricity of the crosshead slider and the piston rod, drill the reamer pin hole, and install the pin;
CB1072,2-88
d, disassemble, Cleaning: disassemble and clean the crosshead assembly and the piston assembly, apply oil and maintain for the general; e. Install the piston; clean the inner wall of the cylinder sleeve and the piston assembly, hoist the piston, check the contact surface clearance between the piston rod and the crosshead pin, tighten the piston rod screw, and measure and adjust the compression space.
f. Piston centering: center the piston-connecting rod device according to the technical requirements, and adjust the front-to-back clearance between the piston head and the cylinder sleeve, the clearance between the slide bar, the clearance between the piston skirt and the cylinder sleeve, the clearance between the guide slide plate, the crosshead shaft and the connecting rod, and the minimum clearance between the connecting rod and the crank arm. After submission for acceptance, remove the live package,
9. Clean the stuffing box; remove the oil seal of the stuffing box, disassemble and clean it for general assembly; h. Final installation: assemble the stuffing box on the piston rod, install the piston ring on the piston head, clean the inner wall of the cylinder sleeve, apply oil, install the piston on the machine, install the piston rod stuffing box, and knock the cylinder number on the piston rod; align and install the flywheel top dead center indicator device. 10.3 The working hour quota is shown in Table 8.
Technical level
Table 8 is based on a five-cylinder engine. If one xenon is added or subtracted, the working hours will increase or decrease by 20%. 10.4
11 Reversing device
11.1 Operation content;
a, cleaning: remove the oil seal of the reversing device, disassemble, clean, assemble, test, b, installation, positioning, installation and tightening of the reversing device according to the requirements of the drawing. 2 The working hours are shown in Table 9.
Padding bacteria
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