CN113074945A - Installation adjusting method and measurement adjusting device for complete machine pre-assembly of marine diesel engine - Google Patents
Installation adjusting method and measurement adjusting device for complete machine pre-assembly of marine diesel engine Download PDFInfo
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- CN113074945A CN113074945A CN202110280946.8A CN202110280946A CN113074945A CN 113074945 A CN113074945 A CN 113074945A CN 202110280946 A CN202110280946 A CN 202110280946A CN 113074945 A CN113074945 A CN 113074945A
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- 238000005259 measurement Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 238000012360 testing method Methods 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000012546 transfer Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram 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 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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Abstract
A marine diesel complete machine pre-assembly installation adjusting method and a measurement adjusting device are disclosed, wherein the measurement 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, the measuring instrument and the adjusting units are arranged on the upper plane and the bottom of a base of a marine diesel, the deflection of bearings of all gears is measured through a water tank arranged on the base, and then the height of the base is adjusted to enable the deflection of the bearings of all gears to meet the mechanical performance requirement of a main; after all parts of the marine diesel engine are completely assembled on the pre-assembly table, the parts are transferred to the assembly test-run table for test run test, and the measurement and adjustment are performed through the measurement and adjustment device, 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 run table and greatly improves the productivity.
Description
Technical Field
The invention relates to the assembly operation of a marine diesel engine, in particular to an installation adjusting method and a measurement adjusting device for the complete machine pre-assembly of the marine diesel engine, 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 manifold and accessories arranged on the scavenging manifold, and the assembly operation flow of a main engine on a test bed position before the test of a bullet train is shown in figure 1. The existing working procedures on the test run bench are generally that a machine base is seated, the machine base is horizontally submitted, a crankshaft is seated, the integrity of the machine base is closed, a frame assembly is folded, a connecting rod assembly is hoisted, a cylinder block scavenging header assembly is folded, a through bolt is tightly pumped, a piston is centered, the gap of a whole machine gear-throwing main bearing is cleaned and submitted, and the like.
The operation flow of the existing marine diesel engine on the test run bench has the following disadvantages:
1) the operation flow sequence of each marine diesel engine cannot be adjusted, and the standard production period occupying the test-run bench is longer;
2) under the condition that the number of the test run stations on the production site is unchanged and the standard production period of a single marine diesel engine is fixed, the capacity of the test run stations is limited, and the capacity cannot be continuously expanded;
3) if a certain host on the test run table is subjected to plan adjustment, and the time for occupying the test run table needs to be prolonged, the host assembly plan subsequently related to the test run table is also affected, and even the submission time is affected.
In view of the above circumstances, a new way for pre-assembling a marine diesel engine has appeared to reduce the operation cycle of the marine diesel engine on a test run bench, that is, each component of the marine diesel engine is completely assembled on the pre-assembling bench, and then the marine diesel engine is transferred to the test run bench by using a lifting tool, and the operation flow of the assembly on the pre-assembling bench is shown in fig. 2.
However, the marine diesel engine needs to be leveled before the motor car, and the purpose of adjusting the SAG of the main engine is to compensate the deformation of the ship after loading; secondly, the thermal deformation of the main engine is compensated, particularly the upper part of the cylinder body; finally, because the alignment of the host is performed on the dock or ship, and some of the ship may be deformed after launch, the alignment data on the dock or ship can only be used as a reference, unless the manufacturer has sufficient experience with the same ship type or host, and compensation should be performed. Because the main engine does not relate to the key points of the factors in the workshop bench test, the whole engine is subjected to gear-throwing and twisting to be used as the basis for checking the horizontal degree of the engine base, the motor train time is short, and if the requirement is met, the subsequent piston centering work is carried out according to the conventional operation flow on the test run bench.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an installation adjusting method and a measurement adjusting device for complete machine pre-assembly of a marine diesel engine, so that after all parts of the marine diesel engine are completely assembled on a pre-assembly bench and transferred to a total assembly test bench for test run, the mechanical properties including the torsion resistance of all gear-throwing gears and all gear-torsion resistances of a shaft system before and after the complete machine is transferred are ensured to be consistent through measurement and adjustment, the requirements are met, the operation period of a main machine on the test run bench is shortened, and the productivity is improved.
The technical scheme for solving the technical problems of the invention is as follows:
a measurement adjusting device for the complete machine pre-assembly of a 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 a base of the marine diesel engine, the deflection of each gear of the bearing is measured through a water tank arranged on the base, and the measuring instrument is used for measuring the height between the tensioning steel wire and the water level in the water tank; the adjusting units are arranged at the bottom of the engine base and used for adjusting the height of the engine base so that the deflection of each gear of the bearing meets the mechanical performance requirement of the main engine of the marine diesel engine.
Furthermore, the elastic steel wire tensioning device comprises a base and a screw rod; 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 wedge and an adjusting stud, wherein the adjusting base and the adjusting wedge are of wedge-shaped structures, and the height is adjusted through the adjusting stud.
The other technical scheme of the invention is as follows:
the mounting and adjusting method for the complete machine pre-final assembly of the marine diesel engine, which is realized by adopting the measuring and adjusting device, is characterized by comprising the following steps of: after all parts of the marine diesel engine are completely assembled on the pre-assembly table, the parts are transferred to the assembly test-run table for test run test, and the measurement and adjustment are performed through the measurement and adjustment device, so that the mechanical properties of the whole diesel engine before and after transfer are kept consistent.
Furthermore, the mechanical properties comprise the torsion resistance of the whole gear throwing and all gears of the shaft system.
Further, the operation steps of the installation and adjustment method are as follows:
1) after the host is assembled on the pre-assembly bench until the whole machine is complete, measuring the swing gear of each cylinder of the whole machine and recording the measurement data, and meanwhile, performing horizontal pre-adjustment on an iron stool on the pre-assembly test run bench;
2) the whole machine hoisting is transferred from the pre-assembly bench to the test run bench, foundation bolts of the machine base are fastened, the gear-throwing of each cylinder of the whole machine is measured, the measured data is recorded, and the measured data is compared with the gear-throwing data recorded on the pre-assembly bench before the transfer, so that the deviation of the front data and the rear data is ensured to be within a standard range;
3) after the lifting tool is dismantled, measuring the gear-throwing of each cylinder of the whole machine again, if the gear-throwing is within the standard range, performing the step 6), and if the gear-throwing is not within the standard range, performing the step 4);
4) measuring the deflection of each bearing of the whole machine by adopting the measuring and adjusting device, comparing the result with standard data, and adjusting the position of each bearing of the whole machine by using the measuring and adjusting device until the deflection of each bearing of the whole machine reaches the standard;
5) re-measuring the gear throwing of each cylinder of the whole machine, if the gear throwing is within the standard range, performing the step 6), and if the gear throwing is not within the standard range, returning to perform the step 4);
6) and performing the working procedures of piston centering, whole machine gear throwing, main bearing clearance and cleaning.
Further, the step 4) of measuring the deflection of each gear of the whole machine by using the measuring and adjusting device refers to:
the method comprises the steps of communicating water troughs on two sides of a marine diesel engine and injecting water into the water troughs, installing an elastic steel wire tensioning device at the rear end of the engine base on the same side, installing an elastic steel wire fixing device at the front end of the engine base, installing distance devices on main bearing measuring points of the engine base, installing a measuring instrument and an elastic steel wire on the distance devices, and measuring the height of the elastic steel wire and the water level in the water troughs through the measuring instrument and recording the height.
Further, the adjusting the position of each bearing of the whole machine by using the measuring and adjusting device in the step 4) refers to:
and 2 adjusting units are padded below each main bearing seat below the machine base, and the height of each main bearing position is adjusted by adjusting the height of each adjusting unit.
Compared with the prior art, the pre-assembly adjusting device has the advantages that part of assembly processes finished on the test run platform are performed on the pre-assembly platform in advance, so that the production period of the test run platform is shortened, the utilization rate and the production capacity of the test run platform are effectively improved, and the mechanical performance of the whole machine before and after transfer is kept consistent and meets the requirements by adjusting through the pre-assembly adjusting device.
Drawings
Fig. 1 is a flow chart of an assembly process of a conventional marine diesel engine on a final assembly test stand.
Fig. 2 is a flow chart of the assembly of the prior marine diesel engine on a pre-final assembly test run bench.
Fig. 3 is an assembly flow diagram 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 adjustment unit.
The device comprises an elastic steel wire tensioning device, a spacing device, a fixing device, a measuring instrument and an adjusting unit.
The specific implementation mode is as follows:
the invention is described in further detail below with reference to the figures and the examples, which should not be construed as limiting the scope of the invention.
The invention provides a mounting and adjusting method and a measuring and adjusting device for the complete machine pre-final assembly of a marine diesel engine, aiming at the marine diesel engine pre-final assembly operation process.
Referring to fig. 2, after the marine diesel engine is completely assembled on the pre-assembly bench according to the operation flow, a whole machine hoisting tool is installed, the assembly gear-throwing is measured and recorded, and then the whole machine is transferred to the assembly test run bench.
Please refer to fig. 3 for the operation flow after the complete machine is transferred to the final assembly test run station, the anchor is fastened after the complete machine is transferred, then the gear throwing and the torsion resistance are measured, the recorded data is compared with the measured data before the transfer, the hoisting tool is removed, and the host machine is installed in an integrity way; and then carrying out whole machine gear-throwing measurement, if the standard requirement is met, carrying out next operation, and if the standard requirement is not met, adopting the measurement adjusting device to carry out measurement and adjustment on the SAG (bearing deflection) 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 stand of the marine diesel engine, and the deflection of each grade of bearing is measured through a water tank arranged on the stand; the adjusting units e are arranged at the bottom of the machine base to adjust the height, so that the deflection of each grade of bearing of the machine base meets the mechanical performance requirement of the host machine. The elastic steel wire tensioning device a comprises a base and a screw rod; the elastic steel wire fixing device c is of a square structure; the measuring instrument d can measure the height between the tensioning steel wire and the horizontal plane in the water tank of the machine base. Referring to fig. 6, the whole of the adjusting unit is a rectangular structure, and includes an adjusting base, an adjusting wedge and an adjusting stud. The adjusting base and the adjusting wedge are two wedge-shaped blocks with the same inclination, the tail part of the upper wedge-shaped adjusting wedge is provided with an adjusting stud, and the lower adjusting base is provided with a locking stud; when the adjusting inclined iron is pulled out outwards, 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 inclined iron is pushed 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 positions of the two wedge-shaped adjusting bases and the adjusting wedge are fixed by using the locking stud, so that the height of the adjusting unit is kept unchanged.
The measurement and adjustment of the SAG (bearing deflection) of the whole machine comprises the following steps:
injecting water into water tanks of a base of the marine diesel engine, and communicating the water tanks on two sides of the marine diesel engine by adopting water pipes to ensure that the water in the water tanks on the two sides are 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 of the same side, a distance device b is installed at each main bearing measuring point of the machine base, after installation is completed, the elastic steel wire tensioning device a is used for tensioning the elastic steel wire, 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 the main bearing corresponding to a certain gear is larger, the adjusting unit e of the gear is used to adjust the position of the main bearing of the machine base of the gear higher, and if the measured data of the main bearing corresponding to the gear is smaller, the adjusting unit e of the gear is used to adjust the position of the main bearing of the machine base of the gear lower.
The following specific operation steps of the present invention are described as follows:
1. referring to fig. 2, the pre-assembly station sequentially performs the steps of base seating, base horizontal submission, crankshaft seating, base integrity, frame folding, connecting rod hoisting, cylinder block assembly folding, through bolt pumping and the like according to the assembly process of the marine diesel engine; and then installing a complete machine lifting tool, measuring and recording the complete machine gear-throwing, and preparing to transfer the complete machine to a final assembly test run bench.
2. Referring to fig. 3, performing bench position iron stool pre-adjustment on a general assembly test bench, transferring a complete machine to the test bench position, fixing a host machine anchor bolt, measuring the whole machine gear-throwing and torsion resistance, comparing and keeping the whole machine gear-throwing measurement data consistent with the data measured on the pre-general assembly bench position, removing a lifting tool, performing complete machine integrity installation, measuring the whole machine gear-throwing again and recording the data, determining whether the design standard requirements are met, and performing piston centering adjustment, complete machine gear-throwing, centering, main bearing clearance and clean submission if the requirements are met; and if the complete machine gear-throwing measurement does not meet the design standard requirement, the complete machine SAG measurement is required.
3. Referring to fig. 4, when SAG measurement is performed on the whole machine, water is injected into water tanks of a machine base of the marine diesel engine, the water tanks on two sides of the marine diesel engine are communicated by using water pipes, liquid levels in the water tanks on two sides are in the same horizontal plane, 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 of the same side, and distance devices b are installed at n main bearing measurement points of the machine base; after the devices are installed, 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 position of the measuring point of each main bearing, the height of the elastic steel wire and the height of the horizontal plane in the water tank are measured and recorded, the height of the elastic steel wire is compared with standard data, and the height of each main bearing is 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 machine base, the machine base anchor bolts are loosened by pumping, 2 adjusting units e are installed below each gear of the main bearing seat below the machine base, and the height of the main bearing position of each gear is adjusted by adjusting the height of the adjusting unit e.
5. Referring to fig. 6, an adjusting unit e of the pre-assembly adjusting device is a cuboid and is composed of two wedge-shaped blocks with the same inclination, the tail of the upper wedge-shaped block is provided with an adjusting stud and a locking stud, when the adjusting stud is pulled out outwards, 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 of the corresponding main bearing position can be adjusted; after the heights of the wedge-shaped blocks are adjusted, the positions of the two wedge-shaped blocks are fixed by using the locking studs, so that the height of the adjusting unit e is kept unchanged.
6. And after the position of each gear of the main bearing is adjusted by the adjusting unit e, measuring the SAG of the whole machine again, confirming that the design standard requirement is met, and then pumping down the foundation bolt.
7. And after SAG adjustment and measurement, continuing to perform whole machine gear-throwing measurement, and after confirming that the standard requirements are met, performing subsequent operation flows such as piston centering adjustment and the like.
Claims (7)
1. The utility model provides a marine diesel engine complete machine measurement adjusting device of final assembly in advance which characterized in that: 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 a base of the marine diesel engine, the deflection of each gear of the bearing is measured through a water tank arranged on the base, and the measuring instrument is used for measuring the height between the tensioning steel wire and the water level in the water tank; the adjusting units are arranged at the bottom of the engine base and used for adjusting the height of the engine base so that the deflection of each gear of the bearing meets the mechanical performance requirement of the main engine of the marine diesel engine.
2. The device for measuring and adjusting the complete machine preassembly of the marine diesel engine according to claim 1, characterized in that: the elastic steel wire tensioning device comprises a base and a screw rod; 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 wedge and an adjusting stud, wherein the adjusting base and the adjusting wedge are of wedge-shaped structures, and the height is adjusted through the adjusting stud.
3. A mounting and adjusting method for pre-assembly of a complete marine diesel engine by adopting the measuring and adjusting device of claim 1 is characterized by comprising the following steps: after all parts of the marine diesel engine are completely assembled on the pre-assembly table, the parts are transferred to the assembly test-run table for test run test, and the measurement and adjustment are performed through the measurement and adjustment device, so that the mechanical properties of the whole diesel engine before and after transfer are kept consistent.
4. The mounting and adjusting method for complete marine diesel engine complete machine preassembly according to claim 3, characterized by comprising the following steps of: the mechanical properties comprise the torsion resistance of the whole machine gear throwing and each gear of the shafting.
5. The mounting and adjusting method for complete marine diesel engine complete machine preassembly according to claim 3, characterized by comprising the following steps of: the operation steps of the installation and adjustment method are as follows:
1) after the host is assembled on the pre-assembly bench until the whole machine is complete, measuring the swing gear of each cylinder of the whole machine and recording the measurement data, and meanwhile, performing horizontal pre-adjustment on an iron stool on the pre-assembly test run bench;
2) the whole machine hoisting is transferred from the pre-assembly bench to the test run bench, foundation bolts of the machine base are fastened, the gear-throwing of each cylinder of the whole machine is measured, the measured data is recorded, and the measured data is compared with the gear-throwing data recorded on the pre-assembly bench before the transfer, so that the deviation of the front data and the rear data is ensured to be within a standard range;
3) after the lifting tool is dismantled, measuring the gear-throwing of each cylinder of the whole machine again, if the gear-throwing is within the standard range, performing the step 6), and if the gear-throwing is not within the standard range, performing the step 4);
4) measuring the deflection of each bearing of the whole machine by adopting the measuring and adjusting device, comparing the result with standard data, and adjusting the position of each bearing of the whole machine by using the measuring and adjusting device until the deflection of each bearing of the whole machine reaches the standard;
5) re-measuring the gear throwing of each cylinder of the whole machine, if the gear throwing is within the standard range, performing the step 6), and if the gear throwing is not within the standard range, returning to perform the step 4);
6) and performing the working procedures of piston centering, whole machine gear throwing, main bearing clearance and cleaning.
6. The mounting and adjusting method for complete marine diesel engine complete machine preassembly according to claim 5, characterized by comprising the following steps of: the step 4) of measuring the deflection of each bearing of the whole machine by using the measuring and adjusting device refers to:
the method comprises the steps of communicating water troughs on two sides of a marine diesel engine and injecting water into the water troughs, installing an elastic steel wire tensioning device at the rear end of the engine base on the same side, installing an elastic steel wire fixing device at the front end of the engine base, installing distance devices on main bearing measuring points of the engine base, installing a measuring instrument and an elastic steel wire on the distance devices, and measuring the height of the elastic steel wire and the water level in the water troughs through the measuring instrument and recording the height.
7. The mounting and adjusting method for complete marine diesel engine complete machine preassembly according to claim 5, characterized by comprising the following steps of: the step 4) of using the measurement adjusting device to adjust the position of each bearing of the whole machine refers to:
and 2 adjusting units are padded below each main bearing seat below the machine base, and the height of each main bearing position is adjusted by adjusting the height of each adjusting unit.
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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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| 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 (en) | 2024-04-05 |
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