Mounting method of marine generator with vibration isolator based on laser measurement

Abstract

The invention discloses a laser measurement-based installation method for a marine generator with a vibration isolator, and the method comprises the following steps: S1, welding a power generation welding the power generation base at the installation position of the generator; welding cushion blocks at four corners of the power generation base are ground; s2, according to the measured height value of each welding cushion block, processing the adjusting cushion block; s3, the generator set is jacked up, the machined adjusting cushion block is placed on the welding cushion block, then the generator set is placed below the welding cushion block and stands for 48 hours, and whether the compression amount of each vibration isolator is within the standard range or not is measured; s4, according to the positions of base screw holes of the vibration isolators, connecting screw holes of the adjusting cushion blocks and the welding cushion blocks are drilled; and S5, center bolts of all the vibration isolators are adjusted to the middle positions, and installation of the generator is completed. According to the method, the gaskets are measured through the laser measuring instrument, and the gaskets are subjected to pre-compression measurement after being subjected to one-time standing for 48 hours after being machined and formed, so that the construction period is shortened, and the construction cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to an installation method for a marine generator with vibration isolators based on laser measurement. Background Technology

[0002] Modern marine generator set installation designs commonly employ flexible vibration isolators to connect and fix the generator set to the base. Depending on the generator set's weight and center of gravity, several flexible vibration isolators are installed, and they are not evenly distributed. During installation, it is essential to ensure that each flexible vibration isolator experiences uniform stress to guarantee the overall service life of the isolators.

[0003] The traditional installation process involves measuring deformation, which means that after installing the vibration isolator, the generator set is placed directly on the welded pads of the base. It is necessary to wait until the generator set is hoisted into place before pre-compression installation, and then leave it to stand for 48 hours multiple times and make multiple adjustments. Each adjustment requires lifting the entire generator set, which results in a long construction period and high labor intensity. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an installation method for a marine generator with vibration isolators based on laser measurement. The method of this invention measures the shims using a laser measuring instrument, and after processing each shim into shape, it performs a one-time 48-hour pre-compression measurement. This avoids the traditional installation method which requires multiple 48-hour pre-compression of the vibration isolators, multiple measurements of the compression value of the vibration isolators, and multiple adjustments of the compression amount. This shortens the construction cycle and reduces the construction cost.

[0005] To achieve the above-mentioned objectives, the technical solution provided by this invention patent is as follows: A method for installing a marine generator with vibration isolators based on laser measurement, wherein the marine generator is mounted on a generator base via a frame, and multiple vibration isolators are installed between the generator base and the frame, the method specifically includes the following steps: S1, Welding of the generator base: According to the installation location of the marine generator, weld the generator base to the location where the generator is installed; grind the welding pads at the four corners of the generator base to make the surface of the welding pads at the four corners flat. S2. Use a laser measuring instrument to measure the height of each welding pad at the four corners of the power generation base, and adjust the processing of the pads according to the measured height of each welding pad. S3, install the finished welding pads on their respective generator bases, install vibration isolators on the generator frame, place the marine generator with external vibration isolators on the pads, lift the generator set, place the processed adjustment pads on the welding pads, then place the generator set under the ground and let it stand for 48 hours, and measure whether the compression of each vibration isolator is within the standard range. S4. Drill the connecting bolt holes of the adjusting shims and welding shims according to the position of the base bolt holes of each vibration isolator, and install the connecting bolts. S5. Adjust the center bolts of each vibration isolator to the middle position, check whether the crankshaft cranking value of the generator diesel engine meets the requirements, and complete the installation of the generator.

[0006] Furthermore, the measurement accuracy of the laser measuring instrument is 0.05 mm.

[0007] Furthermore, the vibration isolator includes an upper casting, a lower casting, a rubber component, a central bolt, a bushing, and a protective cover. The upper and lower castings are connected at their midpoints by a central bolt. A bushing is provided at the midpoint of the lower casting, and a central bolt is provided inside the bushing. A rubber component is provided between the upper and lower castings, and a protective cover is provided at the midpoint of the upper end of the upper casting.

[0008] Furthermore, the adjustment pad is processed by machining the four corners of the adjustment pad according to the measured height deviation of each welded pad at the four corners of the power generation base, so that the four corners of the upper surface of the adjustment pad are on the same horizontal plane.

[0009] Furthermore, the generator set lifting process specifically involves: screwing lifting bolts into the lifting threaded holes at the four corners of each vibration isolator, connecting the bottom of the lifting bolts to the welding pads, lifting the generator set by tightening the lifting bolts, so that the distance between the lower end of the vibration isolator and the welding pad is greater than the height of the adjusting pad, and then installing the adjusting pad on the welding pad.

[0010] Furthermore, the compression amount of each vibration isolator is the change in the vertical distance between the upper and lower castings of the vibration isolator.

[0011] Based on the above technical solution, the installation method of a marine generator with vibration isolator based on laser measurement, as described in this invention patent, has achieved the following technical advantages through practical application: 1. The present invention discloses an installation method for a marine generator with vibration isolators based on laser measurement. The method uses a laser measuring instrument to measure the shims, and after processing each shim into shape, it performs a one-time 48-hour pre-compression measurement. This avoids the traditional installation method which requires multiple 48-hour pre-compression of the vibration isolators, multiple measurements of the compression value of the vibration isolators, and multiple adjustments of the compression amount. This shortens the construction cycle and reduces the construction cost. Attached Figure Description

[0012] Fig. 1 This is a cross-sectional view of the vibration isolator in the installation method of a marine generator with vibration isolator based on laser measurement according to the present invention.

[0013] Fig. 2 This is a diagram of the vibration isolator installation structure in the installation method of a marine generator with vibration isolator based on laser measurement according to the present invention.

[0014] Fig. 3 This is a diagram of the generator set lifting structure in the installation method of a marine generator with vibration isolator based on laser measurement according to the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided with reference to the accompanying drawings. The invention is described using specific examples shown. However, it should be understood that these descriptions are merely exemplary. This description is intended not to limit the scope of the invention. Furthermore, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the invention.

[0016] like Figs. 1-3 As shown, a method for installing a marine generator with vibration isolators based on laser measurement is described. The marine generator is mounted on a generator base 11 via a frame 7, and multiple vibration isolators 8 are installed between the generator base 11 and the frame 7. The method specifically includes the following steps: S1, Welding of the generator base 11: According to the installation position of the marine generator, the generator base 11 is welded to the location where the generator is installed; Grind the four corner welding pads 10 on the generator base 11 to make the surface of the four corner welding pads 10 flat. S2, use a laser measuring instrument to measure the height of each welding pad 10 at the four corners of the power generation base 11, and adjust the processing of the pad 9 according to the measured height of each welding pad 10; S3, install the finished welding pads 10 on their respective generator bases 11, install the vibration isolators 8 on the generator frame 7, place the marine generator with external vibration isolators 8 on the pads, lift the generator set, place the processed adjustment pads 9 on the welding pads 10, then place the generator set under the ground and let it stand for 48 hours, and measure whether the compression of each vibration isolator 8 is within the standard range. S4. Drill the connecting bolt holes of the adjusting shim 9 and the welding shim according to the position of the base bolt holes of each vibration isolator 8, and install the connecting bolts. S5, adjust the center bolts 2 of each vibration isolator 8 to the middle position, check whether the crankshaft deflection value of the generator diesel engine meets the requirements, and complete the installation of the generator.

[0017] This invention changes the traditional installation method of Type 8 marine generators with external vibration isolators. Traditional methods require multiple 48-hour pre-compression cycles of the vibration isolators after the generator set is hoisted into place, repeated compression measurements of the vibration isolators, and multiple adjustments to the compression amount. This results in a long construction period and high labor intensity. Instead, high-precision laser measurement provides accurate data, and the machine tools in the workshop directly process each gasket into shape. A single 48-hour pre-compression measurement is then performed, and after passing the measurement, holes are drilled and bolts are secured. This effectively improves work efficiency, reduces labor intensity, and saves production costs.

[0018] The laser measuring instrument has a measurement accuracy of 0.05 mm.

[0019] The vibration isolator 8 includes an upper casting 5, a lower casting 1, a rubber component 4, a central bolt 2, a bushing 3, and a protective cover 6. The upper casting 5 and the lower casting 1 are connected in the middle by the central bolt 2. The lower casting 1 is provided with a bushing 3 in the middle, and the bushing 3 is provided with the central bolt 2 inside. The rubber component 4 is provided between the upper casting 5 and the lower casting 1, and the protective cover 6 is provided in the middle of the upper end of the upper casting 5.

[0020] The adjusting pad 9 is processed by machining the four corners of the adjusting pad 9 according to the measured height deviation of the welding pads 10 at the four corners of the power generation base 11, so that the four corners of the upper surface of the adjusting pad 9 are on the same horizontal plane. The welding pads 10 are welded and fixed to the power generation base 11.

[0021] The generator set is lifted by screwing in lifting bolts 12 into the lifting threaded holes at the four corners of each vibration isolator 8, so that the bottom of the lifting bolts 12 is connected to the welding pads. The generator set is lifted by screwing in the lifting bolts 12, so that the distance between the lower end of the vibration isolator 8 and the welding pads is greater than the height of the adjusting pads 9. Then the adjusting pads 9 are installed on the welding pads 10.

[0022] The compression amount of each vibration isolator 8 is the change in the vertical distance between the upper casting 5 and the lower casting 1 of the vibration isolator 8.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, the scope of the invention is not limited to this. Those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solution claimed in the present invention.

Claims

1. A method for installing a marine generator with vibration isolators based on laser measurement, wherein the marine generator is mounted on a generator base via a frame, and multiple vibration isolators are installed between the generator base and the frame, characterized in that... The method specifically includes the following steps: S1, Welding of the generator base: According to the installation location of the marine generator, weld the generator base to the location where the generator is installed; grind the welding pads at the four corners of the generator base to make the surface of the welding pads at the four corners flat. S2. Use a laser measuring instrument to measure the height of each welding pad at the four corners of the power generation base, and adjust the processing of the pads according to the measured height of each welding pad. S3, install the finished welding pads on their respective generator bases, install vibration isolators on the generator frame, place the marine generator with external vibration isolators on the pads, lift the generator set, place the processed adjustment pads on the welding pads, then place the generator set under the ground and let it stand for 48 hours, and measure whether the compression of each vibration isolator is within the standard range. S4. Drill the connecting bolt holes of the adjusting shims and welding shims according to the position of the base bolt holes of each vibration isolator, and install the connecting bolts. S5. Adjust the center bolts of each vibration isolator to the middle position, check whether the crankshaft cranking value of the generator diesel engine meets the requirements, and complete the installation of the generator.

2. The installation method of a marine generator with vibration isolator based on laser measurement according to claim 1, characterized in that, The laser measuring instrument has a measurement accuracy of 0.05 mm.

3. The installation method of a marine generator with vibration isolator based on laser measurement according to claim 1, characterized in that, The vibration isolator includes an upper casting, a lower casting, a rubber component, a central bolt, a bushing, and a protective cover. The upper and lower castings are connected at the middle by a central bolt. A bushing is provided at the middle of the lower casting, and a central bolt is provided inside the bushing. A rubber component is provided between the upper and lower castings, and a protective cover is provided at the middle of the upper end of the upper casting.

4. The installation method of a marine generator with vibration isolator based on laser measurement according to claim 3, characterized in that, The adjustment pad is processed by machining the four corners of the adjustment pad according to the measured height deviation of each welded pad at the four corners of the power generation base, so that the four corners of the upper surface of the adjustment pad are on the same horizontal plane.

5. The installation method of a marine generator with vibration isolator based on laser measurement according to claim 4, characterized in that, The generator set lifting process involves screwing lifting bolts into the lifting threaded holes at the four corners of each vibration isolator, connecting the bottom of the lifting bolts to the welding pads, lifting the generator set by tightening the lifting bolts, so that the distance between the lower end of the vibration isolator and the welding pad is greater than the height of the adjusting pad, and then installing the adjusting pad on the welding pad.

6. The installation method of a marine generator with vibration isolator based on laser measurement according to claim 1, characterized in that, The compression of each vibration isolator is the change in the vertical distance between the upper and lower castings of the vibration isolator.

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