CN113074945B - Installation and adjustment method and measurement and adjustment device for complete machine pre-assembly of marine diesel engine - Google Patents
Installation and adjustment method and measurement and adjustment device for complete machine pre-assembly of marine diesel engine Download PDFInfo
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- CN113074945B CN113074945B CN202110280946.8A CN202110280946A CN113074945B CN 113074945 B CN113074945 B CN 113074945B CN 202110280946 A CN202110280946 A CN 202110280946A CN 113074945 B CN113074945 B CN 113074945B
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- 238000005259 measurement Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 17
- 238000009434 installation Methods 0.000 title claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000012546 transfer Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000002000 scavenging effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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- Chemical & Material Sciences (AREA)
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- Combustion & Propulsion (AREA)
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- General Physics & Mathematics (AREA)
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Abstract
The measuring and adjusting device comprises an elastic steel wire tensioning device, an elastic steel wire fixing device, a distance device, a measuring instrument and a plurality of adjusting units, wherein the measuring and adjusting device is arranged on the upper plane and the bottom of a base of the marine diesel engine, and deflection of each gear of bearing is measured through a water tank arranged on the base, so that the height of the base is adjusted to enable the deflection of each gear of bearing to meet the mechanical performance requirement of a host of the marine diesel engine; after all parts of the marine diesel engine are assembled completely on the pre-assembly station, the parts are transferred to the final assembly test station for test run, and the measurement and adjustment device is used for measuring and adjusting, so that the mechanical properties of the whole diesel engine before and after transfer are kept consistent. The invention shortens the operation period, improves the utilization rate of the test bed and greatly improves the productivity.
Description
Technical Field
The invention relates to assembly operation of a marine diesel engine, in particular to a method for installing and adjusting complete machine pre-assembly of the marine diesel engine and a measuring and adjusting device, and belongs to the technical field of diesel engine manufacturing.
Technical Field
The marine diesel engine is mainly formed by assembling a base, a frame, a cylinder body, a scavenging header and accessories arranged on the scavenging header, and the assembling operation flow of a main engine on a test bed before a motor train test is shown in a figure 1. The existing working procedures on the test bench generally comprise seat seating of a machine seat, horizontal submitting of the machine seat, seat integrity of a crankshaft, folding of a machine frame assembly, hoisting of a connecting rod assembly, folding of a cylinder block scavenging manifold assembly, pumping of a through bolt, piston centering, clearance of a main bearing of a gear throwing main bearing of a whole machine, clean submitting and the like.
The operation flow of the prior marine diesel engine on the test bed has the following defects:
1) The operation flow sequence of each marine diesel engine cannot be adjusted, and the standard production period of occupying the test station is longer;
2) Under the condition that the number of test seats is unchanged in a production field and the standard production period of a single marine diesel engine is fixed, the productivity of the test seats is limited and the productivity cannot be continuously enlarged;
3) If a certain host computer on the test station is subjected to plan adjustment, the time for occupying the test station needs to be prolonged, and the subsequent assembly plan of the host computer related to the station can be influenced, even the submitting time is influenced.
In view of the above, a new way of pre-assembling the marine diesel engine is presented to reduce the working period of the marine diesel engine on the test bed, that is, the components of the marine diesel engine are assembled completely in advance on the pre-assembly bed, and then the marine diesel engine is transferred to the test bed by using a lifting tool, and the assembly operation flow on the pre-assembly bed is shown in fig. 2.
However, the marine diesel engine needs to be leveled before the motor car, and the purpose of adjusting the main engine SAG is to compensate the deformation of the ship after cargo loading; secondly, compensating the thermal deformation of the main machine, in particular to the upper part of the cylinder body; finally, because the host adjustment is performed on the slipway or dock, and the ship is deformed in the post-launch part, the adjustment data on the slipway or dock can only be used as a reference, and compensation should be performed unless the manufacturer has sufficient experience with the same ship type or host. Because the main machine does not relate to the key points of the factors in the workshop bench test, the whole machine is used for throwing the gear and twisting as the basis for checking the horizontal degree of the machine base, the motor train time is short, and if the motor train time is required to meet the requirement, the subsequent piston centering work is carried out according to the conventional operation flow on the test bed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a mounting and adjusting method and a measuring and adjusting device for the complete machine pre-assembly of a marine diesel engine, which ensure that the mechanical properties including the swing gear of the complete machine and the torsion degree of each gear of a shafting are kept consistent through measuring and adjusting when all parts of the marine diesel engine are transferred to a final assembly test stand for test run after being completely assembled on the pre-assembly stand, thereby meeting the requirements, reducing the working period of a host machine on the test stand and improving the productivity.
The technical scheme for solving the technical problems is as follows:
the measuring and adjusting device for the complete machine pre-assembly of the marine diesel engine comprises an elastic steel wire tensioning device, an elastic steel wire fixing device, a distance device, a measuring instrument and a plurality of adjusting units; the elastic steel wire tensioning device, the elastic steel wire fixing device, the distance device and the measuring instrument are arranged on the upper plane of the base of the marine diesel engine, deflection of each gear of bearing is measured through a water tank arranged on the base, and the measuring instrument is used for measuring the heights of the tensioning steel wire and the water plane in the water tank; the adjusting units are arranged at the bottom of the engine base and are used for adjusting the height of the engine base to ensure that the deflection of each gear of bearing meets the mechanical performance requirement of the main engine of the marine diesel engine.
Further, the elastic steel wire tensioning device comprises a base and a screw; the elastic steel wire fixing device is of a square structure; the adjusting unit is of a rectangular structure and comprises an adjusting base, an adjusting inclined iron and an adjusting stud, wherein the adjusting base and the adjusting inclined iron are of wedge structures, and the height is adjusted through the adjusting stud.
Another technical scheme of the invention is as follows:
the installation and adjustment method for the complete machine pre-assembly of the marine diesel engine by adopting the measurement and adjustment device is characterized by comprising the following steps of: after all parts of the marine diesel engine are assembled completely on the pre-assembly station, the parts are transferred to the final assembly test station for test run, and the measurement and adjustment device is used for measuring and adjusting, so that the mechanical properties of the whole diesel engine before and after transfer are kept consistent.
Further, the mechanical properties include the degree of torsion of the whole machine in the gear throwing and the shafting.
Further, the installation adjustment method comprises the following operation steps:
1) After the main machine is assembled to be complete on the pre-assembly bench, the gear throwing of each cylinder of the complete machine is measured, the measured data are recorded, and meanwhile, the horizontal pre-adjustment of the iron stool is carried out on the final assembly test bench;
2) The whole machine hoisting is transferred from the pre-assembly station to the test station, foundation bolts of the machine base are fastened, the gear throwing of each cylinder of the whole machine is measured, measured data are recorded, and compared with gear throwing data recorded on the pre-assembly station before transferring, so that the deviation of front and rear data is ensured to be in a standard range;
3) After the hoisting tool is removed, measuring the swing gear of each cylinder of the whole machine again, if the swing gear is within the standard range, performing the step 6), and if the swing gear is not within the standard range, performing the step 4);
4) Measuring the deflection of each gear of the whole machine by adopting the measuring and adjusting device, comparing the result with standard data, and adjusting the position of each gear of the whole machine by using the measuring and adjusting device until the deflection of each gear of the whole machine reaches the standard;
5) Re-measuring the swing gear of each cylinder of the whole machine, if the swing gear is within the standard range, performing the step 6), and if the swing gear is not within the standard range, returning to the step 4);
6) And performing piston centering, complete machine gear throwing, main bearing clearance and clean submitting procedures.
Further, the measuring the deflection of each gear of the bearing of the complete machine by adopting the measuring and adjusting device in the step 4) means:
the water tanks on two sides of the marine diesel engine are communicated, water is injected into the water tanks, the elastic steel wire tensioning device is installed at the rear end of the same side of the engine base, the elastic steel wire fixing device is installed at the front end of the engine base, the distance devices are installed on the measuring points of the main bearings of each gear of the engine base, the measuring instrument is installed on the distance devices, the elastic steel wire is tensioned, and the heights of the elastic steel wire and the water level in the water tanks are measured through the measuring instrument and recorded.
Further, the adjusting the position of each gear bearing of the complete machine by using the measurement adjusting device in the step 4) means:
and 2 adjusting units are arranged under each gear of main bearing seat below the machine base in a cushioning manner, and the height of the main bearing seat of each gear is adjusted by adjusting the height of the adjusting units.
Compared with the prior art, the invention not only carries out part of the assembly procedures completed on the test bed on the pre-assembly bed in advance, thereby reducing the production period occupying the test bed, achieving the effect of effectively improving the utilization rate and the production capacity of the test bed, but also ensures that the mechanical properties of the whole machine before and after the transfer are consistent and meet the requirements by using the pre-assembly adjusting device for adjustment.
Drawings
Fig. 1 is a flow chart of the assembly of a prior art marine diesel engine on a final assembly rig.
Fig. 2 is a flow chart of the assembly of a prior art marine diesel engine on a pre-assembly test bench.
Fig. 3 is an assembly flow chart of the present invention.
Fig. 4 is an installation view of the device of the present invention.
Fig. 5 is an installation diagram of the adjustment unit.
Fig. 6 is a schematic structural diagram of the adjusting unit.
Wherein, a-elastic steel wire tensioning device, b-distance device, c-fixing device, d-measuring instrument, e-adjusting unit.
The specific embodiment is as follows:
the invention will now be described in further detail with reference to the drawings and the specific examples, which are not intended to limit the scope of the invention.
The invention provides a method for installing and adjusting the complete machine pre-assembly of a marine diesel engine and a measuring and adjusting device aiming at the pre-assembly operation flow of the marine diesel engine.
Referring to fig. 2, after the marine diesel engine is assembled completely according to the operation flow on the pre-assembly station, a complete machine hoisting tool is installed, the assembly gear is measured and recorded, and then the complete machine is transferred to the final assembly test station.
Referring to fig. 3, the operation flow after the whole machine is transferred to the general assembly test station is shown, the whole machine is fastened by feet after being transferred, then the swing gear and the torsion degree are measured, the recorded data are compared with the measured data before being transferred, the lifting tool is removed, and the host is integrally installed; and then, carrying out whole machine gear-shifting measurement, if the standard requirement is met and the next operation is carried out, and if the standard requirement is not met, adopting the measurement adjusting device to measure and adjust the SAG (deflection of the bearing) of the whole machine.
Referring to fig. 4 and 5, the measuring and adjusting device includes an elastic wire tensioning device a, an elastic wire fixing device c, a distance device b, a measuring instrument d and a plurality of adjusting units e. The elastic steel wire tensioning device a, the elastic steel wire fixing device c, the distance device b and the measuring instrument d are arranged on the upper plane of the base of the marine diesel engine, and deflection of each gear of bearing is measured through a water tank arranged on the base; the adjusting units e are arranged at the bottom of the machine base and are used for adjusting the height, so that the deflection of each gear of bearing of the machine base meets the mechanical performance requirement of the main machine. The elastic steel wire tensioning device a comprises a base and a screw; the elastic steel wire fixing device c is of a square structure; the measuring instrument d can measure the height of the tensioning steel wire and the water level in the water tank of the machine base. Referring to fig. 6, the adjusting unit has a rectangular structure, and includes an adjusting base, an adjusting chute, and an adjusting stud. The adjusting base and the adjusting wedge iron are two wedge-shaped blocks with the same inclination, the tail part of the upper wedge-shaped adjusting wedge iron is provided with an adjusting stud, and the lower adjusting base is provided with a locking stud; when the adjusting chute is pulled out, the height between the upper plane and the lower plane of the two wedge-shaped blocks of the whole adjusting unit can be reduced, and when the adjusting chute is pushed in inwards, the height between the upper plane and the lower plane of the two wedge-shaped blocks of the whole adjusting unit can be increased, so that the height of the corresponding main bearing position can be adjusted. After the height of the adjusting unit is adjusted, the two wedge-shaped adjusting bases and the adjusting chute are fixed by utilizing the locking studs, so that the height of the adjusting unit is kept unchanged.
The measurement and adjustment of the integral SAG (bearing deflection) comprises:
water is injected into the water tanks of the engine base of the marine diesel engine, and the water tanks at the two sides of the marine diesel engine are communicated by adopting water pipes, so that the water in the water tanks at the two sides is in the same horizontal plane; referring to fig. 4, an elastic steel wire tensioning device a is installed at the rear end of the same side, an elastic steel wire fixing device c is installed at the front end, a distance device b is installed at each main bearing measuring point of the machine base, after the installation is completed, an elastic steel wire is tensioned by the elastic steel wire tensioning device a, a measuring instrument d is installed on the distance device b at each main bearing measuring point position, the heights of the elastic steel wire and the water level in the water tank are measured and recorded, and then the heights are compared with standard data; referring to fig. 5, if the measured data of a certain gear main bearing is larger, the position of the gear main bearing is adjusted to be higher by the adjusting unit e of the gear, if the measured data of the corresponding main bearing is smaller, the position of the gear main bearing is adjusted to be lower by the adjusting unit e of the gear.
The following specific operational steps of the present invention are set forth as follows:
1. referring to fig. 2, the steps of seat seating, horizontal submitting of the seat, seat integrity of the crankshaft, frame folding, connecting rod hoisting, cylinder block assembly folding, through bolt pumping and the like are sequentially performed on the pre-assembly bench according to the assembly flow of the marine diesel engine; and then installing a lifting tool of the whole machine, measuring and recording the swing gear of the whole machine, and preparing the whole machine to be transferred to a final assembly test stand.
2. Referring to fig. 3, a bench is pre-adjusted on a final assembly test bench, a complete machine is transferred to the test bench, a host anchor bolt is fixed, a complete machine swing gear and torsion degree are measured, the complete machine swing gear measurement data are consistent with the data measured on the pre-final assembly bench in comparison, a lifting tool is removed, then complete machine integrity installation is carried out, the complete machine swing gear is measured again, the data are recorded, whether the design standard requirements are met or not is confirmed, and if the requirements are met, piston centering adjustment, complete machine swing gear, centering, main bearing clearance and clean submitting operation are carried out; if the whole machine swing gear measurement does not meet the design standard requirement, the whole machine SAG measurement is needed.
3. Referring to fig. 4, during integral SAG measurement, water is injected into the water tanks of the engine base of the marine diesel engine, the water tanks at two sides of the marine diesel engine are communicated by using water pipes, so that the liquid levels in the water tanks at two sides are in the same horizontal plane, an elastic steel wire tensioning device a is arranged at the rear end of the same side, an elastic steel wire fixing device c is arranged at the front end of the same side, and a distance device b is arranged at the measuring points of n main bearings of the engine base; after the installation of the devices is completed, the elastic steel wire is tensioned by the elastic steel wire tensioning device a, the measuring instrument d is installed on the distance device b at the measuring point position of the main bearing of each gear, the heights of the elastic steel wire and the water level in the water tank are measured and recorded, and then the heights of the main bearing of each gear are compared with standard data, and the positions of the main bearings of each gear are adjusted according to the measured data.
4. Referring to fig. 5, the height of the main bearing position of each gear is adjusted by adjusting an adjusting unit e located below the frame, the foundation bolts of the frame are loosened by pumping, 2 adjusting units e are installed below each gear main bearing seat below the frame, and the height of the main bearing position of each gear is adjusted by adjusting the height of the adjusting units e.
5. Referring to fig. 6, an adjusting unit e of the pre-assembly adjusting device is integrally rectangular and consists of two wedge-shaped blocks with the same inclination, wherein the tail part of the upper wedge-shaped block is provided with an adjusting stud and a locking stud, when the adjusting stud is pulled out, the height between the upper plane and the lower plane of the two wedge-shaped blocks of the whole adjusting unit e can be reduced, and when the adjusting stud is pushed inwards, the height between the upper plane and the lower plane of the two wedge-shaped blocks of the whole adjusting unit e can be increased, so that the height corresponding to the position of the main bearing is adjusted; after the heights of the wedge blocks are adjusted, the positions of the two wedge blocks are fixed by utilizing the locking studs, so that the height of the adjusting unit e is kept unchanged.
6. After the positions of the main bearings of each gear are adjusted through the adjusting unit e, the integral SAG is measured again, the design standard requirements are confirmed to be met, and then the foundation bolts are pumped.
7. After SAG adjustment and measurement, the whole machine gear-throwing measurement is continuously carried out, and after the standard requirement is confirmed to be met, the subsequent operation flows such as piston centering adjustment are carried out.
Claims (3)
1. A method for installing and adjusting the complete machine pre-assembly of a marine diesel engine is characterized by comprising the following steps of: after all parts of the marine diesel engine are assembled completely on the pre-assembly station, the parts are transferred to the assembly test station for test run, and measurement and adjustment are carried out through a measurement and adjustment device, so that the mechanical properties of the whole diesel engine before and after transfer are kept consistent, and the mechanical properties comprise the swing degree of the whole diesel engine and the torsion degree of each gear of a shafting;
the measuring and adjusting device comprises an elastic steel wire tensioning device, an elastic steel wire fixing device, a distance device, a measuring instrument and a plurality of adjusting units; the elastic steel wire tensioning device, the elastic steel wire fixing device, the distance device and the measuring instrument are arranged on the upper plane of the base of the marine diesel engine, deflection of each gear of bearing is measured through a water tank arranged on the base, and the measuring instrument is used for measuring the heights of the tensioning steel wire and the water plane in the water tank; the adjusting units are arranged at the bottom of the engine base and are used for adjusting the height of the engine base to ensure that the deflection of each gear of bearing meets the mechanical performance requirement of a main engine of the marine diesel engine;
the installation and adjustment method comprises the following operation steps:
1) After the main machine is assembled to be complete on the pre-assembly bench, the gear throwing of each cylinder of the complete machine is measured, the measured data are recorded, and meanwhile, the horizontal pre-adjustment of the iron stool is carried out on the final assembly test bench;
2) The whole machine hoisting is transferred from the pre-assembly station to the test station, foundation bolts of the machine base are fastened, the gear throwing of each cylinder of the whole machine is measured, measured data are recorded, and compared with gear throwing data recorded on the pre-assembly station before transferring, so that the deviation of front and rear data is ensured to be in a standard range;
3) After the hoisting tool is removed, measuring the swing gear of each cylinder of the whole machine again, if the swing gear is within the standard range, performing the step 6), and if the swing gear is not within the standard range, performing the step 4);
4) Measuring the deflection of each gear of the whole machine by adopting the measuring and adjusting device, comparing the result with standard data, and adjusting the position of each gear of the whole machine by using the measuring and adjusting device until the deflection of each gear of the whole machine reaches the standard;
the adoption of the measuring and adjusting device to measure the deflection of each gear of the bearing of the whole machine means that: the water tanks at two sides of the marine diesel engine are communicated, water is injected into the water tanks, the elastic steel wire tensioning device is arranged at the rear end of the same side of the engine base, the elastic steel wire fixing device is arranged at the front end of the same side of the engine base, the distance devices are arranged on the measuring points of the main bearings of the engine base, the measuring instruments are arranged on the distance devices, the elastic steel wires are tensioned, and the heights of the elastic steel wires and the water level in the water tanks are measured through the measuring instruments and recorded;
5) Re-measuring the swing gear of each cylinder of the whole machine, if the swing gear is within the standard range, performing the step 6), and if the swing gear is not within the standard range, returning to the step 4);
6) And performing piston centering, complete machine gear throwing, main bearing clearance and clean submitting procedures.
2. The installation adjustment method of the complete machine pre-assembly of the marine diesel engine according to claim 1, wherein the installation adjustment method comprises the following steps: the adjusting the position of each gear bearing of the whole machine by using the measuring and adjusting device in the step 4) means:
and 2 adjusting units are arranged under each gear of main bearing seat below the machine base in a cushioning manner, and the height of the main bearing seat of each gear is adjusted by adjusting the height of the adjusting units.
3. The installation adjustment method of the complete machine pre-assembly of the marine diesel engine according to claim 1, wherein the installation adjustment method comprises the following steps: the elastic steel wire tensioning device comprises a base and a screw; the elastic steel wire fixing device is of a square structure; the adjusting unit is of a rectangular structure and comprises an adjusting base, an adjusting inclined iron and an adjusting stud, wherein the adjusting base and the adjusting inclined iron are of wedge structures, and the height is adjusted through the adjusting stud.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110280946.8A CN113074945B (en) | 2021-03-16 | 2021-03-16 | Installation and adjustment method and measurement and adjustment device for complete machine pre-assembly of marine diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110280946.8A CN113074945B (en) | 2021-03-16 | 2021-03-16 | Installation and adjustment method and measurement and adjustment device for complete machine pre-assembly of marine diesel engine |
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| CN113074945B true CN113074945B (en) | 2024-04-05 |
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| CN113074945A (en) | 2021-07-06 |
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