Modularized and integrated rigid connection base of marine diesel generating set

Abstract

The utility model provides a modularized and integrated rigid connection base of a marine diesel generator set, and belongs to the technical field of diesel generator bases. The penetrating bottom plate, the penetrating oil tank bottom plate, the penetrating side plate A and the penetrating side plate B are connected according to the positioning size relation to form a modular foundation frame. The modularized foundation frame is divided into three modularized installation areas including a diesel engine installation area, a flywheel installation area and a generator installation area from the front end to the rear end, a main lubricating oil tank is arranged in an inner cavity of the diesel engine installation area, an auxiliary lubricating oil tank is arranged in the flywheel installation area, and the interiors of the oil tanks of the two installation areas are communicated. A lubricating oil system of the rigid connection base of the diesel generating set is formed; and two groups of detachable lifting lugs are respectively arranged at the front end and the rear end of the rigid connecting base. Rigid installation of the marine diesel generating set is achieved, the integration degree of a lubricating oil system is high, and hoisting is rapid; the device is high in modularization degree, simple in structure, short in manufacturing and processing period, low in manufacturing cost, high in field installation efficiency, simple to maintain, low in cost and reliable and stable in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel generator bases, and in particular relates to a modular and integrated rigid connection base for a marine diesel generator set. Background Art

[0002] Marine diesel generator sets are composed of diesel engines, flywheels, couplings, generators, connection bases and automatic control systems, and are typical technology-intensive products. They drive the generator to generate electricity through the combustion of the diesel engine, and finally convert the chemical energy of the fuel into electrical energy. Marine diesel generator sets provide a stable power supply for various electrical equipment on ships and living facilities for crew members with their advantages of good stability, reliable power supply, high efficiency and low emissions.

[0003] As the basic bearing component of the marine diesel generator set, the connecting base must bear the dead weight of the diesel engine and the generator in the non-working state; it must bear the huge overturning moment of the diesel engine and the generator during the starting process; it must bear the simple harmonic vibration load of the diesel engine and the motor during the working process; in order to ensure the stable and reliable operation of the marine diesel generator set, this requires that the connecting base that bears the diesel engine and the generator must have sufficient rigidity and strength, and it should also present a reasonable structural form. Otherwise, it will directly affect the reliability, safety and service life of the marine diesel generator set. At present, elastic installation is mostly used in the design of the connecting base. A symmetrical array of rubber vibration isolation blocks is arranged at the lower part of the bottom plate on both sides of the connecting base, and an array of supporting ribs is distributed on the upper part of the bottom plate. The array of rubber vibration isolation blocks at the lower part of the above-mentioned bottom plate are fastened to the hull.

[0004] The lubrication system of a diesel engine provides the necessary lubricating oil for the lubrication and cooling of various moving parts inside the diesel engine body, ultimately ensuring the stable and reliable operation of the diesel engine. As part of the diesel engine lubrication system, the wet sump lubricating oil system stores the lubricating oil in the oil sump of the diesel engine. When the diesel engine is working normally, its lubricating oil pump draws the lubricating oil in the oil sump to the various lubricating parts inside the diesel engine. After lubrication, the lubricating oil returns to the oil sump by its own gravity. At present, the wet sump lubricating oil system is widely used in marine diesel generator sets, usually in two design structures. Structural form 1: The diesel engine lubricating oil is stored in a wet sump, which is directly connected to the diesel engine crankcase. Finally, the entire diesel engine is connected to the connecting base through the engine foot. Structural form two: the diesel engine lubricating oil is stored in the internal cavity of the connecting base, which is located directly below the crankcase. The diesel engine lubricating oil outlet pipe is distributed inside the connecting base lubricating oil tank, and the corresponding pipe interface flange is arranged on the outside. The lubricating oil level gauge, cleaning window, etc. are all arranged at the crankcase observation hole.

[0005] Marine diesel generator sets need to be hoisted several times during manufacturing, testing, and hull installation. There are two commonly used hoisting schemes. Scheme 1: Install two sets of hoisting ears on the cylinder head of the diesel engine body. Before installing the hoisting ears, the cylinder head nuts must be removed using a special tool, a hydraulic tensioner. Then install the above two sets of hoisting ears on the corresponding cylinder heads, and then use hydraulic nuts to tighten the hoisting ears. Finally, use the hoisting device to hoist the diesel generator set to the corresponding location through the hoisting ears. Scheme 2: Two sets of hoisting ribs are symmetrically designed at both ends of the diesel engine side and the generator side of the marine diesel generator set. The length and width of the hoisting ribs are consistent with the dimensions of other ribs, but the thickness is more than three times that of other ribs. The hoisting device can hoist the diesel generator set to the corresponding location through the hoisting points on the front and rear four hoisting plates.

[0006] Marine diesel generator sets have large tonnage, wide power range, complex unit structure, and high technical requirements. The connection base is the basic bearing part of the entire unit. The internal design has a diesel engine lubricating oil storage tank and lubricating oil pipe system, and the external sides are designed with supporting ribs. The upper panel is the diesel engine and motor installation surface, and the lower bottom plate is designed with a hull installation interface. Based on the above characteristics, stringent requirements are put forward for the design of marine diesel generator sets, so its product design cycle is long, the manufacturing cost is high, and the service life requires reliability and stability.

[0007] Defects of the prior art:

[0008] 1. Defects in the elastic installation scheme of the connection base

[0009] During the cabin installation of the diesel generator set in this scheme, the entire generator set needs to be leveled while considering the compression of the rubber vibration isolation block. The compression of some rubber vibration isolation blocks often exceeds the tolerance, resulting in low on-site installation efficiency. At the same time, the rubber vibration isolation blocks will show aging of rubber materials after a certain period of use, which requires them to be replaced regularly. The replacement operation space inside the cabin is small, resulting in low operation efficiency and high replacement cost of the vibration isolation blocks. In addition, the elastically installed connection base has poor overall stiffness during the start-up and shutdown stages of the diesel generator set. In order to improve the overall stiffness, the thickness and number of the connection base ribs are usually increased, which ultimately leads to a larger overall mass and higher manufacturing cost of the connection base.

[0010] 2. Defects of two design structures of wet sump lubricating oil system

[0011] The lubricating oil level gauge and cleaning window of the above two wet oil pan lubricating oil system structures are both set at the crankcase observation hole. During the daily inspection and regular maintenance of the diesel generator set in the subsequent operation, operators often work in a small space, which affects the operation efficiency; at the same time, because the cleaning window is far away from the lubricating oil tank and the space is small, it is difficult for operators to thoroughly clean the sludge at the bottom of the lubricating oil tank, which is not conducive to the reliable operation of the diesel generator set. In addition, during the warm-up process of the diesel generator set, an external pre-supply lubricating oil pump is required to provide power to pump the lubricating oil inside the lubricating oil tank to the moving parts inside the diesel engine for lubrication. The above two wet oil pan lubricating oil system structures do not have a lubricating oil pre-supply pump and piping system, but use a conventional lubricating oil pre-supply pump and piping system arranged outside the unit. Therefore, the modular integration of the connection base is low and the space utilization rate is poor.

[0012] 3. Defects of two complete machine hoisting solutions for diesel generator sets

[0013] During the actual application of the first lifting scheme, the cantilever on one side of the diesel generator motor sinks, which can easily cause the overall deformation of the diesel generator connection base. At the same time, the alignment result of the unit shaft system is prone to deviation, which ultimately leads to reduced reliability and service life of the marine diesel generator set.

[0014] In the actual use of the second hoisting scheme, due to the small horizontal distance of the hoisting holes, the pipes on both sides of one end of the diesel engine will interfere with the hoisting wire rope each time the hoisting is carried out, and the generator stuffing box body at one end of the generator will interfere with the hoisting wire rope. Before and after each hoisting, a dedicated person will be installed to dismantle and reinstall the interfering pipes and generator stuffing box body, and this operation must be repeated in each hoisting link, resulting in low hoisting efficiency of the diesel generator set and high labor costs. Therefore, it is necessary to propose improvements. Utility Model Content

[0015] The technical problem solved by the utility model is to provide a modular and integrated rigid connection base for a marine diesel generator set. The utility model is designed according to the structural characteristics and use requirements of the connection base of the marine diesel generator set, and can realize the rigid installation of the marine diesel generator set, high integration of the lubricating oil system, and rapid lifting. It has a high degree of modularization, a simple structure, a short manufacturing and processing cycle, a low manufacturing cost, a high on-site installation efficiency, simple and low maintenance cost, and a reliable and stable service life.

[0016] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0017] Modular and integrated rigid connection base for marine diesel generator sets, including diesel engine installation area, flywheel installation area, generator installation area, through-side plate A, through-tank bottom plate, through-side plate B, detachable lifting lugs, and two through-bottom plates;

[0018] The two through-bottom plates are arranged in pairs on the left and right sides and are located at the bottom. A through-tank bottom plate is arranged above the two through-bottom plates. The through-side plate A is located above the left through-bottom plate and contacts the left side of the through-tank bottom plate. The through-side plate B is located above the right through-bottom plate and contacts the right side of the through-tank bottom plate. The through-bottom plate, the through-tank bottom plate, the through-side plate A and the through-side plate B are fixedly connected to each other according to the positioning size relationship to form a modular basic frame of the rigid connection base of the diesel generator set. The modular basic frame is divided into three modular installation areas, namely, a diesel engine installation area, a flywheel installation area and a generator installation area, from the front end to the rear end. The three installation areas are respectively fixedly connected by reinforcing connection parts attached to the basic frame, forming a rigid connection base of the diesel generator set. The internal cavity of the diesel engine installation area is set as a main lubricating oil tank, and the interior of the flywheel installation area is set as an auxiliary lubricating oil tank. The interiors of the oil tanks in the two installation areas are connected to each other, forming a lubricating oil system of the rigid connection base of the diesel generator set. Two sets of detachable lifting ears are respectively provided at the front end and the rear end of the rigid connection base.

[0019] The right side, front end and upper area of ​​the diesel engine installation area are composed of two upper panels 1 on the left and right sides, two upper panels 2 on the front and rear ends, the front end panel, 8 rib plates A, a lifting plate A, a mechanical level gauge oil pipe, an electronic level gauge oil pipe, an overflow pipe, two cleaning hole flanges at the front and rear ends, and an auxiliary oil filling port flange; wherein the front end panel and the inner side surfaces of the through-side panels A and the through-side panels B and the upper surfaces of the two through-bottom plates are angle-jointed and welded together, the two upper panels 2 at the front and rear ends, the two upper panels 1 on the left and right sides and the through-side panels A and the through-side panels B are angle-jointed and welded together, and the 8 rib plates A are distributed in sequence and unequally spaced on the right side of the diesel engine installation area, and at the same time, the rib plate A and the two upper panels 2 at the front and rear ends, the right upper panel 1, the through-side panel B, and the right through-bottom plate They are welded together at different angles. In the welding area of ​​the rib plate A on the right side of the rigid connection base, there are the hoisting plate A, the mechanical level gauge oil pipe, the electronic level gauge oil pipe, the overflow pipe, the two cleaning hole flanges at the front and rear ends, and the auxiliary oil filling port flange. The hoisting plate A is welded together with the right upper panel 1, the through side panel B, and the right through bottom plate at different angles. The mechanical level gauge oil pipe, the electronic level gauge oil pipe, the overflow pipe, the two cleaning hole flanges at the front and rear ends, and the oil filling port flange are welded to the corresponding openings of the through side panel B. In addition, the supercharger oil return port flange, the oil filling flange, the oil separator oil inlet flange, the oil separator oil return port flange, the diesel engine main oil outlet flange, the gravity oil drain flange, and the external oil drain flange are welded to the openings on the front panel.

[0020] The left side area of ​​the diesel engine installation area is composed of 8 rib plates A, a hoisting plate A, a lubricating oil pre-supply pump outlet flange, and a lubricating oil pre-supply pump mounting bracket; wherein the 8 rib plates A, the hoisting plate A and the rib plates and the hoisting plate on the right side of the diesel engine installation area are symmetrically distributed, and the 8 rib plates A, the hoisting plate A and the front and rear end upper panels 2, the left upper panel 1, the through side panel A, and the left through bottom plate are angle-jointed and welded together, and the lubricating oil pre-supply pump outlet flange and the lubricating oil pre-supply pump mounting bracket are distributed between the rib plates A welded on the left side of the diesel engine installation area, the lubricating oil pre-supply pump outlet flange is welded at the corresponding opening position of the through side panel A, and the lubricating oil pre-supply pump mounting bracket is also welded on the through side panel A to maintain a certain appropriate distance from the lubricating oil pre-supply pump outlet flange;

[0021] The main lubricating oil tank in the internal cavity of the diesel engine installation area is welded by two upper panels 1 on the left and right sides, two upper panels 2 on the front and rear ends, a through side panel A, a front panel, a through side panel B, a rib plate B, and a through tank bottom plate. The lubricating oil separator oil inlet flange with pipe, support plate 1, lubricating oil separator oil return port flange with pipe, lubricating oil pre-supply pump oil outlet flange with pipe, support plate 2, rib plate C, rib plate D, rib plate E, rib plate F are distributed inside; wherein, the lubricating oil separator oil inlet flange with pipe and the lubricating oil separator oil return port flange with pipe are corner-welded inside the corresponding openings of the front panel, and the support plate 1 is welded with the oil separator oil inlet flange with pipe and the bottom plate of the oil tank at an angle joint; the oil pre-supply pump oil outlet flange with pipe is welded with an angle joint inside the corresponding opening of the through-side plate A; the support plate 2 is welded with the oil pre-supply pump oil outlet flange with pipe and the bottom plate of the oil tank at an angle joint; the rib plate C and rib plate E are distributed at intervals on the left side of the main oil tank and welded with the through-side plate A, the left upper panel 1, and the bottom plate of the oil tank; the rib plate D and rib plate F are distributed in the middle of the main oil tank and welded with the through-side plate A, the two upper panels 1 on the left and right sides, the bottom plate of the oil tank, and the through-side plate B;

[0022] The diesel engine main lubricating oil outlet flange with pipe, support plate 3 and rib plate E are distributed inside the main lubricating oil tank in the internal cavity of the diesel engine installation area; wherein, the diesel engine main lubricating oil outlet flange with pipe is corner-welded inside the corresponding opening of the front end panel, the support plate 3 and the diesel engine main lubricating oil outlet flange with pipe and the bottom plate of the oil tank are corner-welded together, and the rib plates E are distributed at intervals on the right side of the main lubricating oil tank and the rib plates E are corner-welded together with the upper panel 1 on the right side, the bottom plate of the oil tank and the side plate B.

[0023] Furthermore, the closed cavity inside the flywheel installation area is an auxiliary lubricating oil tank, which is welded by the rib plate B, the through side plate A, the through side plate B, the through oil tank bottom plate, the vertical plate 1, and the flat plate 1 in the diesel engine installation area. At the same time, the asbestos sealing gasket and the square cover plate are fastened to the flat plate 1 by the external hexagonal bolts 2. The rib plate G on the left is welded to the flat plate 1 and the through side plate B, and the rib plate G on the right is welded to the flat plate 1 and the through side plate A. Both ends of the threading tube are welded to the corresponding holes of the through side plates A and B at the same time, and the lap plates on the left and right sides are horizontally welded to the through side plates A and B respectively.

[0024] The left area of ​​the flywheel installation area is composed of a flywheel housing installation plate 1, two rib plates H, and a rib plate I; wherein the two rib plates H are welded to the side of the through-side plate B, and the rib plate I is welded to the through-side plate B and the through-bottom plate at an appropriate distance, and at the same time, the flywheel housing installation plate 1 is horizontally placed and welded to the two rib plates H and the rib plate I;

[0025] The right side area of ​​the flywheel installation area is composed of a flywheel housing mounting plate 2, two rib plates J, an angle steel bracket, a rib plate K, and a junction box bracket; wherein the two rib plates J are welded to the side of the through-side plate A, and the rib plate K is welded to the through-side plate A and the through-bottom plate at an appropriate distance, the flywheel housing mounting plate 2 is kept in a horizontal position and is welded to the two rib plates J and the rib plate K, the angle steel bracket is welded to the side of the flywheel housing mounting plate 2, and the junction box bracket is kept in a vertical direction and welded on the rib plate K.

[0026] Furthermore, the generator installation area is composed of two motor bent plates on the left and right sides, two motor installation plates on the left and right sides, four motor inner rib plates 1 on the left and right sides, four motor inner rib plates 2 on the left and right sides, motor inner rib plates 3, three motor inner channel steels, eight motor outer rib plates 1 on the left and right sides, and two lifting plates B on the left and right sides; wherein, two inner rib plates 1 are distributed in pairs on each side of the left and right sides and are welded together with the through-side plate B and the flat plate 1, the three motor inner channel steels are distributed equidistantly and are welded together with the through-side plate A, the through-side plate B, and the through-oil tank bottom plate, two inner rib plates 2 are distributed in pairs on each side of the left and right sides and are welded together with the motor inner channel steel, the through-side plate A, and the through-side plate B, and each motor inner rib plate 2 is aligned with the motor inner channel steel on one side, The inner rib plate 3 of the motor is welded to the inner channel steel of the motor, the through side plate A, and the through side plate B, and is aligned with the inner channel steel of the motor on one side. The four unequally spaced left and right sides of the outer rib plate 1 of the motor are respectively welded to the through side plate A, the through side plate B, and the through bottom plate. The left and right sides of the hanging plate B are symmetrically distributed between the outer rib plates 1 of the motor and are respectively welded to the through side plate A, the through side plate B, and the through bottom plate. The left and right sides of the motor bent plate are symmetrically distributed and are respectively corner-welded with the inner rib plate 1, the inner rib plate 2, the inner rib plate 3 of the motor, the outer rib plate 1, the hanging plate B, the through side plate A, and the through side plate B. The motor mounting plate maintains a horizontal position and is symmetrically distributed on the left and right sides and is respectively welded to the motor bent plates on the left and right sides.

[0027] Furthermore, the two sets of detachable lifting ears are distributed in pairs at the front and rear ends, and are fastened together with the lifting plates A and B by external hexagonal bolts, round flat washers, and hexagonal nuts. The front and rear detachable lifting ears on the same side are symmetrically distributed at both ends of the center of gravity of the entire diesel generator set to ensure that the entire diesel generator set is in a horizontal posture when it is in the air during lifting.

[0028] Furthermore, the plane size and end face size of the rigid connection base of the marine diesel generator set are composed of the total length of the L1 diesel engine installation area, the total length of the L2 flywheel installation area, the total length of the L3 generator installation area, the total width of the upper plane of the L4 diesel engine installation area, the total width of the bottom plane of the L5 diesel engine installation area, the total width of the upper plane of the L6 generator installation area, the height difference between the upper plane of the L7 diesel engine installation area and the upper plane of the generator installation area, and the center distance of the detachable lifting ears on both sides of the L8 rigid connection base; wherein the total length of the L1 diesel engine installation area depends on the length of the installation surface of the installed marine diesel engine fuselage, the total length of the L2 flywheel installation area depends on the selected flywheel length, and the L3 generator The total length of the installation area depends on the sum of the length of the installed generator body and the length of the extended shaft end of the generator. The total width of the upper plane of the L4 diesel engine installation area depends on the width of the installed marine diesel engine body installation surface. The total width of the bottom plane of the L5 diesel engine installation area depends on the width of the cabin installation surface. The total width of the upper plane of the L6 generator installation area depends on the width of the installed generator body connection surface. The height difference between the upper plane of the L7 diesel engine installation area and the upper plane of the generator installation area depends on the difference between the center height of the generator shaft and the center height of the diesel engine crankshaft. The center distance of the detachable lifting ears on both sides of the L8 rigid connection base depends on the width dimension that does not interfere with the diesel engine piping system during lifting.

[0029] The advantages of this utility model compared with the prior art:

[0030] 1. This scheme adopts an overall modular frame plate and shell welding structure, which is suitable for the production mode of multiple varieties and small batches of rigid connection bases of marine diesel generator sets with detachable lifting ears, with low production cost, convenient processing and manufacturing, and short production cycle;

[0031] 2. This solution realizes the rigid installation of the base of the marine diesel generator set, improves the overall rigidity of the diesel generator set during the starting and stopping stages, prolongs its service life, ensures reliable and stable operation, and reduces the difficulty of on-site installation;

[0032] 3. This solution realizes the integrated embedded design of the wet sump lubricating oil system of the marine generator set in the connection base, which improves the overall internal and external space utilization of the marine diesel generator set, saves manufacturing costs, and reduces the difficulty of daily inspection and maintenance operations;

[0033] 4. This solution realizes the rapid and efficient transportation and hoisting of the marine diesel generator set. The lifting lugs of the marine diesel generator set can be removed after hoisting. The hoisting process is safe and reliable, with low labor costs and also saves installation space for the entire generator set.

[0034] 5. This solution realizes the rapid derivation of the connection base of marine diesel generator sets of the same model but different series in the design stage, reduces the workload of designers, improves product design efficiency, and shortens the product design cycle. It has been verified that the entire product design cycle has been shortened from the original 30 days to 5 days;

[0035] 6. This solution has high modular integration, simple structure, good structural rigidity, reliable fastening connection, convenient transportation and lifting, high space utilization, short design and manufacturing cycle, low production and manufacturing cost, reliable and stable service life, and high efficiency of on-site installation and maintenance;

[0036] 7. This solution has good applicability and versatility, and can meet the production mode of multiple varieties and small batches of rigid connection bases for marine diesel generator sets with detachable lifting ears. It has good practical application effects and promotion value in the design and use of rigid connection bases for marine diesel generator sets with detachable lifting ears. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall structure of the rigid connection base in the utility model;

[0038] Figure 2 This is a schematic diagram of the structure of the rigidly connected base basic frame in the utility model;

[0039] Figure 3 This is a schematic diagram of the structure of the diesel engine installation area in the utility model;

[0040] Figure 4 This is a schematic diagram of the left side structure of the diesel engine installation area in the utility model;

[0041] Figure 5 This is a schematic diagram of the main lubricating oil tank structure inside the diesel engine installation area in the utility model. Figure 1 ;

[0042] Figure 6 This is a schematic diagram of the main lubricating oil tank structure inside the diesel engine installation area in the utility model. Figure 2 ;

[0043] Figure 7 This is a schematic diagram of the structure of the auxiliary lubricating oil tank in the closed cavity inside the flywheel installation area of ​​the utility model;

[0044] Figure 8 This is a schematic diagram of the structure of the left side of the flywheel installation area in the utility model;

[0045] Fig. 9 This is a schematic diagram of the structure of the right side of the flywheel installation area in the utility model;

[0046] Fig.10 This is a schematic diagram of the structure of the generator installation area in the utility model;

[0047] Fig.11 It is a schematic diagram of the structure of the detachable lifting ear in the utility model;

[0048] Fig.12 It is a schematic diagram of the plane dimensions of the rigid connection base in the utility model.

[0049] Fig.13 It is a schematic diagram of the end face dimensions of the rigid connection base in the utility model. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] See also Figure 1-13 , describe the embodiments of the present utility model in detail.

[0052] Example: Modular and integrated rigid connection base for marine diesel generator sets, see Figure 1 As shown, it includes a diesel engine installation area 1, a flywheel installation area 2, a generator installation area 3, a through side plate A4, a through oil tank bottom plate 5, a through side plate B6, a detachable lifting lug 7, and two through bottom plates 11;

[0053] For details, see Figure 1-2 As shown, the two through-bottom plates 11 are arranged in pairs on the left and right sides and are located at the bottom, and the through-tank bottom plate 5 is arranged above the two through-bottom plates 11, the through-side plate A4 is located above the left through-bottom plate 11 and contacts the left side surface of the through-tank bottom plate 5, and the through-side plate B6 is located above the right through-bottom plate 11 and contacts the right side surface of the through-tank bottom plate 5. Based on the through-bottom plate 11, the through-tank bottom plate 5, the through-side plate A4, and the through-side plate B6, the modular basic frame of the rigid connection base of the diesel generator set is formed by mutually fixedly connecting the through-bottom plate 11, the through-tank bottom plate 5, the through-side plate A4, and the through-side plate B6 according to the positioning size relationship; The modular basic frame is divided into three modular installation areas, namely, diesel engine installation area 1, flywheel installation area 2, and generator installation area 3, from the front end to the rear end. The three installation areas are respectively fixedly connected to the basic frame by reinforcing connecting parts, forming a rigid connection base of the diesel generator set; the internal cavity of the diesel engine installation area 1 is set as the main lubricating oil tank, and the interior of the flywheel installation area 2 is set as the auxiliary lubricating oil tank. The interiors of the oil tanks in the two installation areas are interconnected, forming the lubricating oil system of the rigid connection base of the diesel generator set; two sets of detachable lifting ears 7 are respectively provided at the front end and the rear end of the rigid connection base.

[0054] In one embodiment, the right side, front end, and upper area of ​​the diesel engine installation area 1 are shown in FIG. Figure 3 As shown, it is composed of two upper panels 11-1 on the left and right sides, two upper panels 21-2 at the front and rear ends, a front panel 1-3, 8 ribs A1-4, a hanging plate A1-5, a mechanical level gauge oil pipe 1-6, an electronic level gauge oil pipe 1-7, an overflow pipe 1-8, two cleaning hole flanges 1-9 at the front and rear ends, and an auxiliary oil filling port flange 1-10; wherein the front panel 1-3 is connected to the inner side of the through-side panel A4, the through-side panel B6 and the upper surface of the two through-bottom panels 11 The two upper panels 21-2 at the front and rear ends, the two upper panels 11-1 on the left and right sides, the through side panels A4, and the through side panels B6 are mutually angle-welded together. The eight ribs A1-4 are sequentially distributed at unequal intervals on the right side of the diesel engine installation area 1. At the same time, the ribs 1-4 and the two upper panels 21-2 at the front and rear ends, the right upper panel 11-1, the through side panel B6, and the right through bottom plate 11 are mutually angle-welded together. The ribs on the right side of the rigidly connected base The A1-4 welding area is provided with the hanging plate A1-5, the mechanical level gauge oil pipe 1-6, the electronic level gauge oil pipe 1-7, the overflow pipe 1-8, the front and rear two cleaning hole flanges 1-9, and the auxiliary oil filling port flange 1-10. The hanging plate A1-5 is welded with the right upper panel 11-1, the through side panel B6, and the right through bottom panel 11. The mechanical level gauge oil pipe 1-6, the electronic level gauge oil pipe 1-7, the overflow pipe 1-8, the front and rear two cleaning hole flanges 1-9, and the auxiliary oil filling port flange 1-10. The hole flange 1-9 and the oil filling port flange 1-10 are welded at the corresponding openings penetrating the side plate B6; in addition, the openings on the front end panel 1-3 are correspondingly welded with the supercharger lubricating oil return port flange 1-3-1, the lubricating oil filling flange 1-3-2, the lubricating oil separator oil inlet flange 1-3-3, the lubricating oil separator oil return port flange 1-3-4, the diesel engine main lubricating oil outlet flange 1-3-5, the gravity oil drain port flange 1-3-6, and the external lubricating oil drain port flange 1-3-7;

[0055] The left side area of ​​the diesel engine installation area 1, see Figure 4As shown, it is composed of 8 rib plates A1-4, a hanging plate A1-5, a lubricating oil pre-supply pump outlet flange 1-11, and a lubricating oil pre-supply pump mounting bracket 1-12; wherein the 8 rib plates A1-4, the hanging plate A1-5 and the right rib plates and the hanging plate of the diesel engine installation area 1 are symmetrically distributed on the left and right, and the 8 rib plates A1-4, the hanging plate A1-5 and the front and rear end upper panels 21-2, the left upper panel 11-1, the through side panel A4, the left through side panel The bottom plates 11 are mutually corner-jointed and welded together. In addition, the lubricating oil pre-supply pump outlet flange 1-11 and the lubricating oil pre-supply pump mounting bracket 1-12 are distributed between the rib plates A1-4 welded on the left side of the diesel engine installation area 1. The lubricating oil pre-supply pump outlet flange 1-11 is welded at the corresponding opening position of the through-side plate A4. The lubricating oil pre-supply pump mounting bracket 1-12 is also welded on the through-side plate A4 and keeps a certain appropriate distance from the lubricating oil pre-supply pump outlet flange 1-11.

[0056] The main lubricating oil tank in the internal cavity of the diesel engine installation area 1 is shown in FIG. Figure 5 As shown, it is welded by two upper panels 11-1 on the left and right sides, two upper panels 21-2 on the front and rear ends, through-side panel A4, front panel 1-3, through-side panel B6, rib plate B1-13, and through-tank bottom plate 5, and inside it are distributed lubricating oil separator oil inlet flange with pipe 1-3-3-1, support plate 11-3-3-2, lubricating oil separator oil return port flange with pipe 1-3-4-1, lubricating oil pre-supply pump oil outlet flange with pipe 1-11-1, support plate 2 1-11-2, rib plate C1-14, rib plate D1-15, rib plate E1-16, rib plate F1-17; wherein, the lubricating oil separator oil inlet flange with pipe 1-3-3-1, the lubricating oil separator oil return port flange with pipe 1-3-4-1 are corner-welded inside the corresponding openings of the front panel 1-3, the support plate 11-3-3-2 is corner-welded with the lubricating oil separator oil inlet flange with pipe 1-3-3-1 and the through-tank bottom plate 5, the lubricating oil pre-supply pump oil outlet flange with pipe 1-11-1 is corner-welded inside the corresponding openings of the through-side panel A4, the support plate 2 1-11-2 is welded with the flange with pipe 1-11-1 of the oil pre-supply pump outlet and the bottom plate 5 of the oil tank at an angle joint; the ribs C1-14 and E1-16 are distributed at intervals on the left side of the main oil tank and are welded with the side plate A4, the upper panel 1 1-1 on the left side and the bottom plate 5 of the oil tank; the ribs D1-15 and F1-17 are distributed in the middle of the main oil tank and are welded with the side plate A4, the two upper panels 1 1-1 on the left and right sides, the bottom plate 5 of the oil tank and the side plate B6;

[0057] The main lubricating oil tank in the internal cavity of the diesel engine installation area 1 is shown in FIG. Figure 6As shown, the diesel engine main lubricating oil outlet flange with pipe 1-3-5-1, support plate 31-3-5-2, and rib plate E1-16 are distributed inside; wherein, the diesel engine main lubricating oil outlet flange with pipe 1-3-5-1 is corner-welded inside the corresponding opening of the front end panel 1-3, the support plate 31-3-5-2 is corner-welded with the diesel engine main lubricating oil outlet flange with pipe 1-3-5-1 and the oil tank bottom plate 5, and the rib plates E1-16 are distributed at intervals on the right side of the main lubricating oil tank, and the rib plates E1-16 are corner-welded with the upper panel 11-1 on the right side, the oil tank bottom plate 5, and the side plate B6.

[0058] In one embodiment, the closed cavity inside the flywheel installation area 2 is an auxiliary lubricating oil tank, as shown in Figure 7, which is formed by welding the rib plate B1-13, the through side plate A4, the through side plate B6, the through oil tank bottom plate 5, the vertical plate 12-10, and the flat plate 12-9 in the diesel engine installation area 1, while the asbestos sealing gasket 2-7 and the square cover plate 2-8 are fastened to the flat plate 12-9 by the external hexagonal bolts 22-6, the rib plate G2-3 on the left side is welded to the flat plate 12-9 and the through side plate B6, and the rib plate G2-3 on the right side is welded to the flat plate 12-9 and the through side plate A4, and the two ends of the threading tube 2-4 are simultaneously welded to the corresponding holes of the through side plate A4 and the through side plate B6, and the lap plates 2-2 on the left and right sides are horizontally welded to the through side plate A4 and the through side plate B6 respectively;

[0059] The left side area of ​​the flywheel installation area 2 is as follows Figure 8 As shown, it is composed of a flywheel housing mounting plate 12-1, two rib plates H2-11, and a rib plate I2-12; wherein the two rib plates H2-11 are welded to the side of the through-side plate B6, and the rib plate I2-12 is welded to the through-side plate B6 and the through-bottom plate 11 in close proximity and at an appropriate distance, and at the same time, the flywheel housing mounting plate 12-1 is horizontally placed and welded to the two rib plates H2-11 and the rib plate I2-12;

[0060] The right side of the flywheel installation area 2, see Fig. 9 As shown, it is composed of a flywheel housing mounting plate 22-5, two rib plates J2-13, an angle steel bracket 2-14, a rib plate K2-15, and a junction box bracket 2-16; wherein the two rib plates J2-13 are welded to the side of the through-side plate A4, the rib plate K2-15 is welded to the through-side plate A4 and the through-bottom plate 11 at an appropriate distance, the flywheel housing mounting plate 22-5 is kept in a horizontal position and is welded to the two rib plates J2-13 and the rib plate K2-15, the angle steel bracket 2-14 is welded to the side of the flywheel housing mounting plate 22-5, and the junction box bracket 2-16 is kept in a vertical direction and welded on the rib plate K2-15.

[0061] In one embodiment, the generator installation area 3, see Fig.10 As shown, it is composed of two motor bent plates 3-1 on the left and right sides, two motor mounting plates 3-2 on the left and right sides, four motor inner rib plates 13-3 on the left and right sides, four motor inner rib plates 23-4 on the left and right sides, motor inner rib plates 33-5, three motor inner channel steels 3-6, eight motor outer rib plates 13-7 on the left and right sides, and two hanging plates B3-8 on the left and right sides; wherein, two of the inner rib plates 13-3 are distributed in pairs on each side of the left and right sides and are welded together with the through side plate B6 and the flat plate 12-9, the three motor inner channel steels 3-6 are distributed at equal distances and are welded together with the through side plate A4, the through side plate B6, and the through oil tank bottom plate 5, the motor inner rib plates 23-4 are distributed in pairs on each side of the left and right sides and are welded together with the motor inner channel steel 3-6, the through side plate A4, and the through side plate B6, and each motor inner rib plate 23-4 is aligned with the motor inner channel steel 3-6 on one side, and the motor inner rib plate 3 3-5 is welded with the inner channel steel 3-6 of the motor, the through side plate A4, and the through side plate B6, and is aligned with the inner channel steel 3-6 of the motor on one side. The four unequally spaced left and right sides of the outer rib plate 1 3-7 of the motor are respectively welded with the through side plate A4, the through side plate B6, and the through bottom plate 11. The hanging plate B3-8 is symmetrically distributed between the outer rib plates 1 3-7 of the motor on the left and right sides and is respectively welded with the through side plate A4, the through side plate B6, and the through bottom plate 11. The motor bent plate 3-1 is symmetrically distributed on the left and right sides and is respectively welded with the inner rib plate 1 3-3, the inner rib plate 23-4, the inner rib plate 3 3-5 of the motor, the outer rib plate 1 3-7, the hanging plate B3-8, the through side plate A4, and the through side plate B6. The motor mounting plate 3-2 maintains a horizontal position and is symmetrically distributed on the left and right sides and is respectively welded with the motor bent plates 3-1 on the left and right sides.

[0062] In one embodiment, see Fig.11 As shown, the two groups of detachable lifting ears 7 are distributed in pairs at the front and rear ends, and are fastened together with the lifting plates A1-5 and B3-8 by external hexagonal bolts 8, round flat washers 9, and hexagonal nuts 10. The front and rear detachable lifting ears 7 on the same side are symmetrically distributed at both ends of the center of gravity of the entire diesel generator set to ensure that the entire diesel generator set is in a horizontal posture when it is in the air during lifting.

[0063] In one embodiment, the plane size and end face size of the rigid connection base of the marine diesel generator set are as follows: Figure 12-13As shown, it is composed of L1 the total length of the diesel engine installation area 1, L2 the total length of the flywheel installation area 2, L3 the total length of the generator installation area 3, L4 the total width of the upper plane of the diesel engine installation area 1, L5 the total width of the bottom plane of the diesel engine installation area 1, L6 the total width of the upper plane of the generator installation area 3, L7 the height difference between the upper plane of the diesel engine installation area 1 and the upper plane of the generator installation area 3, and L8 the installation center distance of the detachable lifting ears 7 on both sides of the rigid connection base; wherein the total length of the L1 diesel engine installation area 1 depends on the length of the installation surface of the installed marine diesel engine fuselage, the total length of the L2 flywheel installation area 2 depends on the selected flywheel length, and the total length of the L3 generator installation area 3 depends on the selected flywheel length. The sum of the length of the installed generator body and the length of the extended shaft end of the generator, the total width of the upper plane of the L4 diesel engine installation area 1 depends on the width of the installed marine diesel engine body installation surface, the total width of the bottom plane of the L5 diesel engine installation area 1 depends on the width of the cabin installation surface, the total width of the upper plane of the L6 generator installation area 3 depends on the width of the installed generator body connection surface, the height difference between the upper plane of the L7 diesel engine installation area 1 and the upper plane of the generator installation area 3 depends on the difference between the center height of the generator shaft and the center height of the diesel engine crankshaft, and the installation center distance of the detachable lifting ears 7 on both sides of the L8 rigid connecting base depends on the width dimension that does not interfere with the diesel engine piping system during lifting.

[0064] The rigid connection base is first welded as a whole and then the mounting surface is milled. The two upper panels 1 1-1 on the left and right sides of the diesel engine installation area 1 and the two upper panels 2 1-2 on the front and rear ends that contact the diesel engine body are machined with a plurality of threaded holes and the contact surface is cut (surface roughness R a =3.2), the flywheel housing mounting plate 1 2-1 and the flywheel housing mounting plate 2 2-5 in contact with the flywheel mounting area 2 are processed with a plurality of threaded holes and the contact surface is cut (surface roughness R a =12.5), the two motor mounting plates 3-2 on the left and right sides of the generator mounting area 3 that are in contact with the generator are machined with a set of through holes without threads (generator connection holes) and blind holes with threads (generator centering tool mounting holes). The contact surfaces are cut at the same time (surface roughness R a =3.2), and the two through-bottom plates 11 on the left and right sides are processed with a plurality of non-threaded connecting through holes and threaded top screw holes, and the surfaces in contact with the cabin fastening are cut (surface roughness R a =3.2). Based on the above technical design scheme, it is possible to achieve rigid and efficient installation of marine diesel generator sets, high utilization of lubricating oil system integration and rapid lifting during transportation.

[0065] The utility model has the following features:

[0066] 1. The utility model adopts an overall modular frame plate and shell welding design method, which has a simple structure, good rigidity, high system integration, reliable fastening connection, and convenient transportation and lifting; all fastening installation interfaces of the diesel engine installation area 1, the flywheel installation area 2, and the generator installation area 3 use the GB / T193-2003 common threaded connection method, which is convenient for manufacturing and processing, low cost, convenient on-site installation and disassembly, and high efficiency; the three modular functional areas of the diesel engine installation area 1, the flywheel installation area 2, and the generator installation area 3 are all assembled and welded with thin plate panels, among which the diesel engine installation area 1 is internally and externally integrated and nested with pipes and flanges attached to the marine diesel engine lubrication system. The rigid connection base is light in weight, less in material consumption, low in manufacturing cost, and has a short manufacturing cycle. The diesel engine installation area 1, the flywheel installation area 2, and the generator installation area 3 are generally in a three-point bearing mode, and a certain number of supporting ribs are distributed on the outer side of each installation area, so that the load distribution of the contact installation surface is uniform, the rigidity is good, and the service life is reliable and stable; the rigid connection base and the cabin can be quickly installed through an array of non-threaded connection through holes and threaded top screw holes through the bottom plate 11, and the on-site installation operation is efficient. At the same time, since the rigid connection base is directly installed in contact with the cabin, the contact area is large and the load distribution is uniform, so the diesel generator set has good overall rigidity during the starting and stopping stages, reducing the influence of local deformation on the overall shaft alignment result of the diesel generator set, and improving the service life and reliability of the diesel generator set. The detachable lifting lug 7 is fastened and installed on both sides of the front and rear ends of the rigid connection base by external hexagonal bolts 8, round flat washers 9, and hexagonal nuts 10, which can meet the requirements of the rigid connection base for quick installation and removal of the detachable lifting lug 7 before and after operation and lifting, improve the lifting operation efficiency, and increase the space utilization rate after the rigid connection base is installed.

[0067] 2. The rigid connection base basic frame is based on the through-bottom plate 11, the through-tank bottom plate 5, the through-side plate A4, and the through-side plate B6, which are angle-jointed and welded with each other according to the positioning size relationship to form a modular basic frame of the rigid connection base of the diesel generator set. The plate material is ship plate grade B\GB / T712-2022, and the plate yield strength is ≥235MPa. The plate thickness of the through-side plate A4, the through-tank bottom plate 5, and the through-side plate B6 is 12mm, and the thickness of the through-bottom plate 11 is 27mm, so that the rigid connection base basic frame has good supporting strength and light overall weight.

[0068] 3. The right side, front end and upper area of ​​the diesel engine installation area 1 adopts two upper panels 1 1-1 on the left and right sides, two upper panels 2 1-2 on the front and rear ends, the front panel 1-3, 8 rib plates A1-4, hanging plates A1-5, mechanical level gauge oil pipes 1-6, electronic level gauge oil pipes 1-7, overflow pipes 1-8, two cleaning hole flanges 1-9 on the front and rear ends, and auxiliary oil filling port flange 1-10, which are mutually corner-welded with the through side panel A4, through side panel B6, and through bottom plate 11 in the rigid connection base basic frame. The openings on the front panel 1-3 are correspondingly welded with the turbocharger lubricating oil return port flange 1-3-1, lubricating oil filling flange 1-3-2, and lubricating oil separator oil inlet flange 1 -3-3, lubricating oil separator return port flange 1-3-4, diesel engine main lubricating oil outlet flange 1-3-5, gravity oil drain port flange 1-3-6, external lubricating oil drain port flange 1-3-7; the left area of ​​the diesel engine installation area 1 adopts 8 rib plates A1-4, lifting plate A1-5, lubricating oil pre-supply pump oil outlet flange 1-11, lubricating oil pre-supply pump installation bracket 1-12 and the through side plate A4 and through bottom plate 11 in the rigid connection base foundation frame. The main lubricating oil tank in the internal cavity of the diesel engine installation area 1 is composed of two upper panels 1 on the left and right sides. 1-1, the two upper panels at the front and rear ends 2 1-2, the front panel 1-3 and the through side panel A4, the through oil tank bottom plate 5, the through side panel B6 rib plate B1-13 in the rigid connection base basic frame are welded together, and the corresponding positions inside are welded with the oil separator oil inlet flange with pipe 1-3-3-1, support plate 1 1-3-3-2, oil separator oil return port flange with pipe 1-3-4-1, oil pre-supply pump oil outlet flange with pipe 1-11-1, support plate 2 1-11-2, rib plate C1-14, rib plate D1-15, rib plate E1-16, rib plate F1-17; the corresponding positions inside the main oil tank of the internal cavity of the diesel engine installation area 1 are also welded with the diesel engine main oil outlet flange with pipe 1-3-5-1, support plate 3 1-3-5-2, rib plate E1-16. All types of plate materials on the left and right sides of the diesel engine installation area 1 are made of ship plate B grade \ GB / T712-2022, and the plate yield strength is ≥ 235MPa. The thickness of the upper panel 1 1-1 and the upper panel 2 1-2 is 27mm, the thickness of the lifting plate A1-5 is 35mm, and the thickness of the remaining plates is 12mm; the front end and the left and right sides of the oil engine installation area 1 are made of Q235A \ GB / T3274, and the pipe system materials are made of pipes of corresponding specifications in the GB / T8163 standard; the internal ribs and support plates of the main lubricating oil in the internal cavity of the diesel engine installation area 1 are made of ship plate B grade \ GB / T712-2022, the plate yield strength is ≥ 235MPa, the ribs are 12mm thick, and the internal pipe system materials are also made of pipes of corresponding specifications in the GB / T8163 standard. Diesel engine installation area 1 (see Figure 3 , Figure 4) The left and right side ribs A1-4, the hoisting plate A1-5 and the main lubricating oil tank inside the diesel engine installation area 1 (see Figure 5 , Figure 6 ) are symmetrically arranged along the central axis of the rigid connection base and are unequally distributed along the central axis of the rigid connection base, which realizes the integrity of the diesel engine installation area 1 structure and enhances the structural rigidity and strength of the rigid connection base when it is working. At the same time, the ribs A1-4, the hoisting plate A1-5, the ribs C1-14, the ribs D1-15, the ribs E1-16, the ribs F1-17 and the upper panel 1 1-1, the upper panel 2 The threaded holes on 1-2 are kept at a certain safety distance to avoid interference with the fastening bolts during the subsequent installation of the diesel engine, which improves the structural adaptability of the rigid connection base during installation; in addition, the rib plate C1-14 has a U-shaped notch for pipe avoidance, and the rib plate D1-15 has a circular notch for pipe avoidance. The rib plate A1-4, the hoisting plate A1-5, the rib plate C1-14, the rib plate D1-15, the rib plate E1-16, and the rib plate F1-17 are designed with stress relief arc transition angles and blunt edges to effectively solve the stress concentration problem when the diesel engine installation area 1 of the rigid connection base is working. The main lubricating oil tank in the internal cavity of the diesel engine installation area 1 (see Figure 5 , Figure 6 ) The lubricating oil separator oil inlet flange with pipe 1-3-3-1 has two support plates 11-3-3-2 welded at the bottom, the lubricating oil pre-supply pump oil outlet flange with pipe 1-11-1 has a support plate 2 1-11-2 welded at the bottom, and the diesel engine main lubricating oil outlet flange with pipe 1-3-5-1 has a support plate 3 1-3-5-2 welded. The above three specifications of support plates enhance the overall structural rigidity of the corresponding pipes during operation. Diesel engine installation area 1 (see Figure 3 , Figure 4 ) The turbocharger oil return port flange 1-3-1 on the front panel 1-3 is connected to the diesel engine turbocharger oil return pipe, the oil filling flange 1-3-2 is connected to the cabin oil filling pipe, the oil separator oil inlet flange 1-3-3 is connected to the cabin oil separator oil inlet pipe, the oil separator oil return port flange 1-3-4 is connected to the cabin oil separator oil return pipe, the diesel engine main oil outlet flange 1-3-5 is connected to the diesel engine main oil pipe, the gravity drain port flange 1-3-6 is connected with a screw plug, and the external lubricant is connected to the diesel engine. The oil drain port flange 1-3-7 is connected to the oil drain pipe, the right overflow pipe 1-8 is connected to the overflow pipe outside the machine, the two cleaning hole flanges 1-9 at the front and rear ends of the right side are installed with sealing covers, the auxiliary oil filling port flange 1-10 is connected to the spare oil filling pipe, the left lubricating oil pre-supply pump mounting bracket 1-12 is installed with the lubricating oil pre-supply pump, and the lubricating oil pre-supply pump outlet flange 1-11 is connected to the lubricating oil pipe lubricating oil pre-supply pump inlet pipe. The above-mentioned various flanges and connecting pipes on the outside of the diesel engine installation area 1 are connected to the main lubricating oil tank in the internal cavity of the diesel engine installation area 1 (see Figure 5, Figure 6 ) The corresponding internal lubricating oil separator inlet flange with pipe 1-3-3-1, lubricating oil separator return oil flange with pipe 1-3-4-1, diesel engine main lubricating oil outlet flange with pipe 1-3-5-1, and lubricating oil pre-supply pump outlet flange with pipe 1-11-1 together constitute the wet lubricating oil system of the rigid connection base of the diesel generator set. During the operation of the diesel engine, the contaminated lubricating oil after use is recovered, and then filtered by the external lubricating oil separator to continuously provide clean lubricating oil to the diesel engine. In addition, during the hot standby stage of the diesel engine, sufficient clean lubricating oil can be provided to the diesel engine through the pre-supply lubricating oil pump box. This embedded integrated wet lubricating oil system replaces the physical structure of the wet oil pan and the external pre-supply lubricating oil system of the traditional marine diesel engine, which simplifies the overall structure of the entire diesel generator set, maximizes the utilization of internal and external space, and reduces manufacturing costs. The front and right side area of ​​the diesel engine installation area 1 (see Figure 3 ) After the mechanical and electronic level gauges are installed, the two level gauge designs form redundant lubricating oil high and low level alarms for the wet lubricating oil system of the diesel generator set. When the lubricating oil level exceeds the limit height, the excess oil will be automatically discharged through the overflow pipe 1-8. When the lubricating oil level is lower than the limit low level height, the lubricating oil will be automatically injected through the front lubricating oil filling flange 1-3-2, ultimately keeping the lubricating oil level at a reasonable height, improving the reliability and adaptability of the daily operation of the diesel generator set. In addition, the two cleaning hole flanges 1-9 at the front and rear ends of the right side of the diesel engine installation area 1 can facilitate the operator to clean the oil stains in the internal main lubricating oil tank during the maintenance of the diesel generator set, solving the problem of operating in a small space during previous maintenance, improving maintenance efficiency, and saving human resources. The upper area of ​​the diesel engine installation area 1 (see Figure 3 ) The two upper panels 1 1-1 on the left and right sides and the two upper panels 2 1-2 on the front and rear ends are machined with a plurality of threaded holes and the contact surfaces are cut at the same time (surface roughness R a =3.2), the threaded connection method improves the efficiency of on-site diesel generator set installation, and the surface roughness R a =3.2, which can improve the contact stiffness between the rigid connection base and the contact surface of the diesel engine body, and also increase the sealing of the lubricating oil.

[0069] 4. Auxiliary oil tank in the closed cavity inside the flywheel installation area 2 (see Figure 7 ), the left side of flywheel installation area 2 (see Figure 8 ), the right side of flywheel installation area 2 (see Fig. 9) The materials of the plates and ribs of the three parts are all made of ship plate B grade \ GB / T712-2022, the material yield strength is ≥ 235MPa, the thickness of the plates and ribs is 12mm, the materials of the threading tubes 2-4 are steel pipe cold 20-60×4\GB / T8163, and the materials of the angle steel brackets 2-14 are angle steel 40×40×5-GB / T706\Q235A-GB / T700. The closed cavity auxiliary lubricating oil tank inside the flywheel installation area 2 (see Figure 7 ) As an auxiliary oil storage tank of the wet lubricating oil system of the rigid connection base of the diesel generator set, it increases the storage capacity of the diesel generator set's lubricating oil, provides sufficient oil for the lubrication, cleaning and cooling of the moving parts of the diesel generator set, and at the same time improves the internal space utilization of the rigid connection base; during the maintenance of the diesel generator set, the operator can clean the sludge in the auxiliary lubricating oil tank by opening the upper cover plate 2-8 of the flat plate 1 2-9, which improves the maintainability of the rigid connection base of the diesel generator set and provides convenience for maintenance work; the left and right side ribs G2-3 and the flat plate 1 2-9, through-side panels A4 and B6 are welded together, and the lap plates 2-2 on the left and right sides are also horizontally welded on the through-side panels A4 and B6, respectively, increasing the overall rigidity of the structure in this area; the threading tube 2-4 connects the left and right sides of the rigid connection base of the diesel generator set, and can guide the generator control signal cable on the left to the diesel generator set control system in the right area. At the same time, the threading tube 2-4 provides a physical barrier protection for the generator control signal cable, which can avoid damage to the generator control signal cable due to bumps, extrusions, etc. during operation, and improve the reliability of the daily operation of the diesel generator set. The left area of ​​the flywheel installation area 2 (see Figure 8 ) Two ribs H2-11, rib I2-12 and the right side of flywheel installation area 2 (see Fig. 9 ) The two ribs J2-13 and K2-15 are symmetrical on the left and right sides along the central axis of the rigid connection base, which is beneficial to increase the overall structural rigidity of the flywheel installation area 2. At the same time, the flywheel housing mounting plates 1 2-1 and 2 2-5 on both sides are processed with arrays of threaded holes of the same specifications and the surface roughness R after surface cutting a =12.5um, which can meet the requirements of rapid installation and disassembly of the flywheel housing, and has high efficiency in on-site installation and maintenance. At the same time, the rigidity between the contact installation surfaces is high, which is conducive to improving the anti-vibration characteristics of the flywheel housing when the diesel generator set is running. The right side of the flywheel installation area 2 (see Fig. 9 ) Angle steel bracket 2-14 and junction box bracket 2-16 are respectively processed with threaded holes of different array specifications, which can be used to install and fix external pipelines and generator junction box terminals, thereby improving the space utilization outside the rigid connection base of the diesel generator set.

[0070] 5. Generator installation area 3 (see Fig.10), consists of two motor bent plates 3-1 on the left and right sides, two motor mounting plates 3-2 on the left and right sides, four motor inner ribs 13-3 on the left and right sides, four motor inner ribs 2 3-4, motor inner ribs 3 3-5, three motor inner channel steels 3-6, eight motor outer ribs 1 3-7 on the left and right sides, and two lifting plates B3-8 on the left and right sides. The materials of the above plates and ribs are all made of ship plate grade B\GB / T712-2022, and the material yield strength is ≥235MPa. The material specification of the motor inner channel steel 3-6 is channel steel-200×75×9-GB / T706\Q235A-GB / T700, motor bent plate 3-1, motor inner rib 1 3-3, motor inner rib 2 3-4, motor inner rib 3 3-5, motor outer rib 1 The thickness of 3-7 is 12mm, the thickness of the motor mounting plate 3-2 is 30mm, and the thickness of the hoisting plate B3-8 is 35mm; the bottom plate 5 of the oil tank is penetrated and a gap is opened in the generator installation area 3 to form a bottom hollow structure, two motor bent plates 3-1 on the left and right sides, two motor mounting plates 3-2 on the left and right sides, four motor inner rib plates 1 on the left and right sides 3-3, four motor inner rib plates 2 on the left and right sides 3-4, motor inner rib plates 3 3-5, three motor inner channel steels 3-6, eight motor outer rib plates 1 on the left and right sides 3-7, the two lifting plates B3-8 on the left and right sides are symmetrically distributed along the central axis of the rigid connection base of the diesel generator set, which improves the strength and rigidity of the overall structure of the generator installation area 3, increases the vibration resistance of the motor installation area 3 when the diesel generator set is running, and at the same time, the bottom hollow structure also reduces the overall weight of the rigid connection base of the diesel generator set; the motor bent plate 3-1 and the motor installation plate 3-2 on the left and right sides of the motor installation area 3 are processed with 6 generator connection through holes, and at the same time, the motor installation plates 3-2 on the left and right sides are processed with 6 groups of generator centering position adjustment tooling installation threaded blind holes, and the generator is installed on the 6 groups of generator centering position adjustment tooling installation threaded blind holes on the motor installation plates 3-2 on the left and right sides. After the centering position adjustment tool is adjusted, the centering efficiency of the diesel generator set shaft system at the installation site can be greatly improved. In addition, the diameters of the six generator connection through holes on the motor bending plate 3-1 and the motor mounting plate 3-2 on the left and right sides of the motor installation area 3 are larger than the diameters of the connection through holes on the generator connection bottom plate, which solves the problem that the connection bolts cannot be installed due to the non-concentricity of the centers of the six generator connection through holes on the motor bending plate 3-1 and the motor mounting plate 3-2 on the left and right sides of the diesel generator set shaft system after the centering, thereby improving the installation efficiency of the diesel generator set motor connection bolts; in addition, the two surfaces of the two motor mounting plates 3-2 on the left and right sides that contact the bottom surface of the generator connection base are respectively cut (surface roughness R a =3.2), which can improve the contact stiffness of the two contact surfaces, improve the installation position accuracy of the diesel generator set and the rigid connection base, and at the same time reduce the influence of the shape and position dimension tolerance on the centering accuracy of the diesel generator set shaft system.

[0071] 6. With detachable lifting lug 7 (see Fig.11 ), the two pairs of detachable lifting ears 7 on the left and right sides are symmetrically distributed and fastened and installed together with the lifting plate A1-5 and the lifting plate B3-8 by the external hexagonal bolts 8, round flat washers 9, and hexagonal nuts 10, and the front and rear detachable lifting ears 7 on the same side are symmetrically distributed at both ends of the center of gravity of the entire diesel generator set, which is convenient for the horizontal posture adjustment of the entire diesel generator at high altitude during transportation and lifting; the material of the detachable lifting ear 7 is selected from the ship plate grade B\GB / T712-2022, the plate yield strength ≥235MPa, and the plate thickness is 45mm; the detachable lifting ear 7 is processed with 2 rows and 3 columns, a total of 6 through holes, and 1 shackle installation through hole, and is also processed with a stress relief arc transition angle and a blunt edge large slope right angle; through the external hexagonal bolts 8, round flat washers 9, and hexagonal nuts 10, it can be quickly installed and disassembled with the lifting plate A1-5 and the lifting plate B3-8 before and after operation and lifting, saving The invention reduces the occupied space of the rigid connection base of the diesel generator set when it is installed in the cabin, and solves the influence of the traditional lifting of the fuselage cylinder head on the centering accuracy of the shaft system of the entire diesel generator set and the problem of the need to dismantle the peripheral interference pipe system of the diesel generator set when lifting the rib plate position, thereby improving the on-site lifting efficiency of the diesel generator set and saving labor costs; in addition, the detachable lifting ears 7 on the left and right sides are symmetrically distributed along the central axis of the rigid connection base of the diesel generator set, the detachable lifting ears 7 on the front and rear ends are symmetrically distributed along the mass center of gravity of the rigid connection base of the diesel generator set, and the stress relief arc transition angle and blunt edge large slope right angle processed locally on the detachable lifting ears 7 can make the four detachable lifting ears 7 evenly stressed when the diesel generator set is hoisted, and also eliminate the problem of local structural stress concentration of the detachable lifting ears 7, thereby improving the safety and reliability of the rigid connection base of the diesel generator set during hoisting.

[0072] 7. Plane dimensions and end dimensions of the rigid connection base of a marine diesel generator set with a detachable lifting lug (see Fig.12 , 13 ) includes L1 diesel engine installation area 1 total length, L2 flywheel installation area 2 total length, L3 generator installation area 3 total length, L4 diesel engine installation area 1 upper plane total width, L5 diesel engine installation area 1 bottom plane total width, L6 generator installation area 3 upper plane total width, L7 diesel engine installation area 1 upper plane and generator installation area 3 upper plane height difference, L8 rigid connection base on both sides of the detachable lifting lug 7 installation center distance and other design dimensions. The plane size and end face size of the rigid connection base of the marine diesel generator set with detachable lifting lugs (see Fig.12 , 13) is the basis for designers to quickly realize the derivative design of different series of rigid connection bases for the same type of marine diesel engines. Taking a certain type of marine inline 5L cylinder diesel generator set as an example, the generator model has been determined at the initial stage of the rigid connection base design of the marine inline 5 cylinder diesel generator set, the flywheel model has been determined through the shaft system torsional vibration calculation, and the interface width of the cabin installation surface has been determined. Therefore, according to the above known conditions, the specific values ​​of each dimension such as the total length of L1 diesel engine installation area 1, the total length of L2 flywheel installation area 2, the total length of L3 generator installation area 3, the total width of the upper plane of L4 diesel engine installation area 1, the total width of the bottom plane of L5 diesel engine installation area 1, the total width of L6 generator installation area 3, the height difference between the upper plane of L7 diesel engine installation area 1 and the upper plane of generator installation area 3, and the installation center distance of the detachable lifting ears 7 on both sides of the L8 rigid connection base are determined. In the Teamcenter 11.0 product lifecycle management system, a special file package for the project of a rigid connection base for a marine diesel generator set with a detachable lifting lug is created. Three new levels are created in the file package. The top level is the assembly (code: D20AC900XXA), which is the rigid connection base for a marine diesel generator set with a detachable lifting lug (see Figure 1 ), the second top layer is the sub-assembly assembly (code: D20AC800XXA), which is the rigid connection base frame (see Figure 2 ), the bottom layer is various basic parts (code: D20AC100XXA), specifically various plates, ribs, pipes, flanges (properties are special parts) and various fasteners bolts, nuts, washers (properties are standard parts), where XX in the codes D20AC900XXA, D20AC800XXA, and D20AC100XXA increases from 01 in sequence according to the number of new parts created, and the standard parts are directly called from the Teamcenter 11.0 system standard parts library. Based on the above hierarchical relationship and part classification, special part objects and versions (D20AC100XXA, ..., ...) of various plates, ribs, pipes, and flanges are newly created in the special file package of the project of rigid connection base of marine diesel generator sets with detachable lifting ears, and then the NX 11.0 3D software integrated in the Teamcenter 11.0 system is called to create corresponding 3D solid models under the special part versions of the above various plates, ribs, pipes, and flanges. In Teamcenter 11.0 system, NX 11.0 3D software is used to introduce the newly created 3D models of through-side panel A4, through-tank bottom panel 5, through-side panel B6, and through-bottom panel 11, and the rigid connection base frame is completed (see Figure 2) 3D solid assembly. Similarly, Teamcenter 11.0 system calls NX 11.0 3D software to introduce the sub-top-level sub-assembly assembly, namely the rigid connection base frame (code: D20AC800XXA) and various plates, ribs, pipes, flanges (D20AC100XXA, ..., ...) and various fasteners bolts, nuts, washers (attributes are standard parts) 3D solid models according to a certain type of marine inline 5-cylinder diesel generator set, the total length of L1 diesel engine installation area 1, the total length of L2 flywheel installation area 2, the total length of L3 generator installation area 3, and the total length of L4 diesel engine installation area 1, L5, L6, L7, L8, L9, L10, L20, L21, L30, L40, L50, L60, L70, L80, L80, L90, L100, L110, L120, L130, L140, L150, L160, L170, L180, L190, L200, L210, L220, L230, L240, L250, L260, L270, L280, L290, L30 ...Due to the changes in the total length of the L1 diesel engine installation area 1, the L2 flywheel installation area 2, and the L3 generator installation area 3 of the rigid connection base of the marine diesel generator set with detachable lifting lugs caused by different series, and the number and distance of various ribs need to be adjusted appropriately, the integrated NX The 11.0 3D software saves the 3D models of a certain type of in-line 5L marine diesel generator set rigid connection base with detachable lifting ears (D20AC900XXA), the sub-assembly assembly, i.e. the rigid connection base basic frame (code: D20AC800XXA) and some plates and ribs (D20AC100XXA, ..., ...) as new items and names them as (D20AC900XXA2, D20AC800XXA2, D20AC100XXA2, ..., ...) in sequence in the special file package of the project of the marine diesel generator set rigid connection base with detachable lifting ears under the Teamcenter 11.0 system. Then, use the integrated NX 11.0 3D soft opening assembly of a certain type of inline 5L marine diesel generator set rigid connection base (D20AC900XXA2) with detachable lifting lugs, synchronized modeling size constraint adjustment, related rib plate quantity and installation distance adjustment, cutting feature parameter adjustment, and finally use NX 11.0 3D software 2D engineering drawing module to complete the derived design of the marine diesel generator set rigid connection base with detachable lifting lugs and the rapid annotation design of the bottom-level special parts drawings. The plane size and end face size of the marine diesel generator set rigid connection base with detachable lifting lugs (see. Fig.12 , 13 ) as the basis, through the Teamcenter 11.0 system and the integrated NX11.0 3D software, designers can quickly realize the derivative design of the rigid connection base of different series (6L, 7L, 8L, etc.) of the same type of marine diesel engine, shortening the product design cycle and reducing the difficulty of product design. In the design process, dimensional interference checks can be carried out to improve the product design quality.

[0073] 8. End face dimensions of the rigid connection base of a marine diesel generator set with a detachable lifting lug (see Fig.13 ) in the L7 diesel engine installation area 1 and the generator installation area 3, which solves the problem of low efficiency of on-site installation work due to the need to add adjustment pads for on-site shaft alignment when the center line position of the generator drive shaft is lower than the center line position of the marine diesel engine crankshaft. In addition, the center of gravity of the marine diesel engine is lower than the center of gravity of the generator, which avoids the occurrence of shaft resonance and improves the vibration resistance of the rigid connection base when the marine diesel generator set is working.

[0074] 9. Rigid connection base for marine diesel generator sets with detachable lifting lugs (see Figure 1 ) The plates and various rib plates used have welding grooves at the welding positions. The welding method is fillet welding, and the weld fillet height is 8 to 12 mm. The welding heat treatment method adopts weld stress relief annealing, and the weld quality inspection adopts non-destructive radiography (RT) inspection. The above methods are used to increase the welding strength and welding quality of the rigid connection base.

[0075] 10. Finite element strength verification analysis of the rigid connection base of the marine diesel generator set with detachable lifting lugs: ① Under the operation and hoisting conditions of the whole unit, the local stress at the detachable lifting lug 7 is the largest, with a maximum stress of 172MPa; ② Under the working conditions of the whole unit, the stress at the generator installation area 3 is the largest, with a maximum stress of 25MPa; the materials of the plates and ribs of the whole unit are all ship plate grade B\GB / T712-2022, with a yield strength of ≥235MPa. Since the maximum maximum stress under both conditions is less than the yield strength of ship plate grade B\GB / T712-2022, the structural strength and rigidity of the rigid connection base of the marine diesel generator set with detachable lifting lugs are safe and reliable during transportation and hoisting as well as daily operation.

[0076] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0077] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Modular and integrated rigid connection base for marine diesel generator sets, characterized by: It includes a diesel engine installation area (1), a flywheel installation area (2), a generator installation area (3), a through-side plate A (4), a through-tank bottom plate (5), a through-side plate B (6), a detachable lifting lug (7), and two through-bottom plates (11); The two through-bottom plates (11) are arranged in pairs on the left and right sides and are located at the bottom. A through-tank bottom plate (5) is arranged above the two through-bottom plates (11). The through-side plate A (4) is located above the left through-bottom plate (11) and is in contact with the left side surface of the through-tank bottom plate (5). The through-side plate B (6) is located above the right through-bottom plate (11) and is in contact with the right side surface of the through-tank bottom plate (5). Based on the through-bottom plate (11), the through-tank bottom plate (5), the through-side plate A (4) and the through-side plate B (6), the through-bottom plate (11), the through-tank bottom plate (5), the through-side plate A (4) and the through-side plate B (6) are fixedly connected to each other according to the positioning size relationship to form a modular base of a rigid connection base of a diesel generator set. The modular basic frame is divided into three modular installation areas, namely, a diesel engine installation area (1), a flywheel installation area (2), and a generator installation area (3), from the front end to the rear end. The three installation areas are respectively connected to the basic frame by reinforcing connection parts, thereby forming a rigid connection base of the diesel generator set. The internal cavity of the diesel engine installation area (1) is set as a main lubricating oil tank, and the internal cavity of the flywheel installation area (2) is set as an auxiliary lubricating oil tank. The oil tanks of the two installation areas are interconnected, thereby forming a lubricating oil system of the rigid connection base of the diesel generator set. The front end and the rear end of the rigid connection base are respectively provided with two sets of detachable lifting ears (7).

2. The modular and integrated rigid connection base for marine diesel generator sets according to claim 1, characterized in that: The right side, front end and upper area of ​​the diesel engine installation area (1) are composed of two upper panels 1 (1-1) on the left and right sides, two upper panels 2 (1-2) on the front and rear ends, a front end panel (1-3), eight rib plates A (1-4), a hanging plate A (1-5), a mechanical level gauge oil pipe (1-6), an electronic level gauge oil pipe (1-7), an overflow pipe (1-8), two cleaning hole flanges (1-9) at the front and rear ends, and an auxiliary oil filling port flange (1-10); wherein the front end panel (1-3) and the inner side surfaces of the through-side panels A (4) and the through-side panels B (6) are The upper surfaces of the two through-bottom plates (11) are mutually angle-jointed and welded together; the two upper panels 2 (1-2) at the front and rear ends, the two upper panels 1 (1-1) at the left and right sides, the through-side plate A (4), and the through-side plate B (6) are mutually angle-jointed and welded together; the eight rib plates A (1-4) are sequentially distributed at unequal intervals on the right side of the diesel engine installation area (1); the rib plates A (1-4) are mutually angle-jointed and welded together with the two upper panels 2 (1-2) at the front and rear ends, the right upper panel 1 (1-1), the through-side plate B (6), and the right through-bottom plate (11); The welding area of ​​the rib plate A (1-4) on the right side of the base is provided with a hanging plate A (1-5), a mechanical level gauge oil pipe (1-6), an electronic level gauge oil pipe (1-7), an overflow pipe (1-8), two cleaning hole flanges at the front and rear ends (1-9), and an auxiliary oil filling port flange (1-10). The hanging plate A (1-5) is corner-welded with the right upper panel 1 (1-1), the through side panel B (6), and the right through bottom plate (11). The mechanical level gauge oil pipe (1-6), the electronic level gauge oil pipe (1-7), and the overflow pipe (1-8) are connected to the bottom plate. , two cleaning hole flanges (1-9) at the front and rear ends, and an oil filling port flange (1-10) are welded to corresponding openings penetrating the side plate B (6); in addition, the openings on the front panel (1-3) are correspondingly welded with a supercharger lubricating oil return port flange (1-3-1), a lubricating oil filling flange (1-3-2), a lubricating oil separator oil inlet flange (1-3-3), a lubricating oil separator oil return port flange (1-3-4), a diesel engine main lubricating oil outlet flange (1-3-5), a gravity oil drain port flange (1-3-6), and an external lubricating oil drain port flange (1-3-7); The left side area of ​​the diesel engine installation area (1) is composed of 8 rib plates A (1-4), a hanging plate A (1-5), a lubricating oil pre-supply pump oil outlet flange (1-11), and a lubricating oil pre-supply pump installation bracket (1-12); wherein the 8 rib plates A (1-4), the hanging plate A (1-5) and the rib plates and the hanging plate on the right side of the diesel engine installation area (1) are symmetrically distributed on the left and right sides, and the 8 rib plates A (1-4), the hanging plate A (1-5) and the front and rear end upper panels 2 (1-2), the left upper panel 1 (1-1), and the through side panel A (4), the left through-bottom plate (11) is mutually corner-jointed and welded together, and the lubricating oil pre-supply pump outlet flange (1-11) and the lubricating oil pre-supply pump mounting bracket (1-12) are distributed between the rib plates A (1-4) welded on the left side of the diesel engine mounting area (1), the lubricating oil pre-supply pump outlet flange (1-11) is welded to the corresponding opening position of the through-side plate A (4), and the lubricating oil pre-supply pump mounting bracket (1-12) is also welded on the through-side plate A (4) to maintain a certain appropriate distance from the lubricating oil pre-supply pump outlet flange (1-11); The main lubricating oil tank in the internal cavity of the diesel engine installation area (1) is welded together by two upper panels 1 (1-1) on the left and right sides, two upper panels 2 (1-2) on the front and rear ends, a through side panel A (4), a front panel (1-3), a through side panel B (6), a rib plate B (1-13), and a through tank bottom plate (5). The lubricating oil separator oil inlet flange with pipe (1-3-3-1), a support plate 1 (1-3-3-2), and a lubricating oil separator oil return port are distributed inside. The flange with pipe (1-3-4-1), the oil pre-supply pump oil outlet flange with pipe (1-11-1), the support plate 2 (1-11-2), the rib plate C (1-14), the rib plate D (1-15), the rib plate E (1-16), and the rib plate F (1-17); wherein the oil separator oil inlet flange with pipe (1-3-3-1) and the oil separator oil return port flange with pipe (1-3-4-1) are corner welded on the front end panel (1-3). The support plate 1 (1-3-3-2) is welded to the oil separator oil inlet flange with pipe (1-3-3-1) and the oil tank bottom plate (5) at an angle, and the oil pre-supply pump oil outlet flange with pipe (1-11-1) is welded to the corresponding opening of the through side plate A (4). The support plate 2 (1-11-2) is welded to the oil pre-supply pump oil outlet flange with pipe (1-11-1) and the oil tank bottom plate (5) at an angle. The ribs C (1-14) and E (1-16) are distributed at intervals on the left side of the main oil tank and are welded together with the through side panel A (4), the left upper panel 1 (1-1), and the through tank bottom panel (5); the ribs D (1-15) and F (1-17) are distributed in the middle of the main oil tank and are welded together with the through side panel A (4), the left and right upper panels 1 (1-1), the through tank bottom panel (5), and the through side panel B (6); The diesel engine main lubricating oil outlet flange with pipe (1-3-5-1), support plate 3 (1-3-5-2), and rib plate E (1-16) are distributed inside the main lubricating oil tank of the internal cavity of the diesel engine installation area (1); wherein the diesel engine main lubricating oil outlet flange with pipe (1-3-5-1) is corner-welded inside the corresponding opening of the front end panel (1-3); the support plate 3 (1-3-5-2) is corner-welded with the diesel engine main lubricating oil outlet flange with pipe (1-3-5-1) and the through tank bottom plate (5); and rib plates E (1-16) are distributed at intervals on the right side of the main lubricating oil tank and are corner-welded with the rib plates E (1-16) and the upper panel 1 (1-1) on the right side, the through tank bottom plate (5), and the through side plate B (6).

3. The modular and integrated rigid connection base for marine diesel generator sets according to claim 2, characterized in that: The sealed cavity inside the flywheel installation area (2) is an auxiliary lubricating oil tank, which is formed by welding the rib plate B (1-13), the through side plate A (4), the through side plate B (6), the through oil tank bottom plate (5), the vertical plate 1 (2-10), and the flat plate 1 (2-9) in the diesel engine installation area (1). At the same time, the asbestos sealing gasket (2-7) and the square cover plate (2-8) are fastened to the flat plate 1 (2-9) by means of the external hexagonal bolts 2 (2-6). The rib plate G (2-3) on the left side is welded to the flat plate 1 (2-9) and the through side plate B (6). The rib plate G (2-3) on the right side is welded to the flat plate 1 (2-9) and the through side plate A (4). Both ends of the threading tube (2-4) are simultaneously welded to the corresponding holes of the through side plate A (4) and the through side plate B (6). The lap plates (2-2) on the left and right sides are horizontally welded to the through side plate A (4) and the through side plate B (6). The left side area of ​​the flywheel mounting area (2) is composed of a flywheel housing mounting plate 1 (2-1), two rib plates H (2-11), and a rib plate I (2-12); wherein the two rib plates H (2-11) are welded to the side of the through-side plate B (6), and the rib plate I (2-12) is welded to the through-side plate B (6) and the through-bottom plate (11) at an appropriate distance, and at the same time, the flywheel housing mounting plate 1 (2-1) is horizontally placed and welded to the two rib plates H (2-11) and the rib plate I (2-12); The right side area of ​​the flywheel mounting area (2) is composed of a flywheel housing mounting plate 2 (2-5), two rib plates J (2-13), an angle steel bracket (2-14), a rib plate K (2-15), and a junction box bracket (2-16); wherein the two rib plates J (2-13) are welded to the side of the through-side plate A (4); the rib plate K (2-15) is welded to the through-side plate A (4) and the through-bottom plate (11) at an appropriate distance; the flywheel housing mounting plate 2 (2-5) is welded to the two rib plates J (2-13) and the rib plate K (2-15) in a horizontal position; the angle steel bracket (2-14) is welded to the side of the flywheel housing mounting plate 2 (2-5); and the junction box bracket (2-16) is welded to the rib plate K (2-15) in a vertical direction.

4. The modular and integrated rigid connection base for marine diesel generator sets according to claim 3 is characterized in that: The generator installation area (3) is composed of two motor bent plates (3-1) on the left and right sides, two motor installation plates (3-2) on the left and right sides, four motor inner rib plates 1 (3-3) on the left and right sides, four motor inner rib plates 2 (3-4) on the left and right sides, a motor inner rib plate 3 (3-5), three motor inner channel steels (3-6), eight motor outer rib plates 1 (3-7) on the left and right sides, and two hanging plates B (3-8) on the left and right sides; wherein the inner rib plates 1 (3-3) are arranged in pairs on each side and are connected to the through-side plate B. (6), the flat plate 1 (2-9) are welded together, the three motor inner channel steels (3-6) are equidistantly distributed and welded together with the through-side plate A (4), the through-side plate B (6), and the through-tank bottom plate (5), the motor inner rib plates 2 (3-4) are arranged in pairs on the left and right sides and are welded together with the motor inner channel steel (3-6), the through-side plate A (4), and the through-side plate B (6), and each motor inner rib plate 2 (3-4) is aligned with the motor inner channel steel (3-6) on one side, and the motor inner rib plates 2 (3-4) are aligned with the motor inner channel steel (3-6) on one side, and the motor inner rib plates 2 (3-4) are aligned with the motor inner channel steel (3-6) on one side, and the motor inner rib plates 2 (3-4) are aligned with the motor inner rib plates ... The plate 3 (3-5) is welded to the inner channel steel (3-6) of the motor, the through side plate A (4), and the through side plate B (6) and is aligned with the inner channel steel (3-6) of the motor on one side. The motor outer rib plate 1 (3-7) is symmetrically distributed on the left and right sides and is welded to the through side plate A (4), the through side plate B (6), and the through bottom plate (11). The hanging plate B (3-8) is symmetrically distributed on the left and right sides between the motor outer rib plate 1 (3-7) and is aligned with the through side plate A (4), the through side plate B (6 ), through the bottom plate (11) and welded together, the motor bent plate (3-1) is symmetrically distributed on the left and right sides and is respectively welded together with the inner rib plate 1 (3-3), the inner rib plate 2 (3-4), the motor inner rib plate 3 (3-5), the outer rib plate 1 (3-7), the hanging plate B (3-8), the through side plate A (4), and the through side plate B (6) by corner welding, the motor mounting plate (3-2) is kept in a horizontal position and is symmetrically distributed on the left and right sides and is respectively welded together with the motor bent plates (3-1) on the left and right sides.

5. The modular and integrated rigid connection base for marine diesel generator sets according to claim 1, characterized in that: The plane dimensions and end face dimensions of the rigid connection base of the marine diesel generator set are composed of the total length of the L1 diesel engine installation area (1), the total length of the L2 flywheel installation area (2), the total length of the L3 generator installation area (3), the total width of the upper plane of the L4 diesel engine installation area (1), the total width of the bottom plane of the L5 diesel engine installation area (1), the total width of the upper plane of the L6 generator installation area (3), the height difference between the upper plane of the L7 diesel engine installation area (1) and the upper plane of the generator installation area (3), and the installation center distance of the L8 detachable lifting ears (7) on both sides of the rigid connection base; wherein the total length of the L1 diesel engine installation area (1) depends on the length of the installation surface of the marine diesel engine installed, the total length of the L2 flywheel installation area (2) depends on the selected flywheel length, and the L The total length of the generator installation area (3) depends on the sum of the length of the installed generator body and the length of the generator shaft end extending outward, the total width of the upper plane of the L4 diesel engine installation area (1) depends on the width of the installed marine diesel engine body installation surface, the total width of the bottom plane of the L5 diesel engine installation area (1) depends on the width of the cabin installation surface, the total width of the upper plane of the L6 generator installation area (3) depends on the width of the installed generator body connection surface, the height difference between the upper plane of the L7 diesel engine installation area (1) and the upper plane of the generator installation area (3) depends on the difference between the center height of the generator shaft and the center height of the diesel engine crankshaft, and the installation center distance of the detachable lifting ears (7) on both sides of the L8 rigid connection base depends on the width dimension that does not interfere with the diesel engine piping system during lifting.

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