Test bench for marine diesel engine units
Patent Information
- Application Number
- CN202521649891.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-04
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-08-04
AI Technical Summary
但是，水平设置的柴油机机组不够接近实际的船用环境，无法很好地模拟船用柴油机机组的实际船用使用状态，试验效果不够好
[0008]根据本实用新型的船用柴油机机组的试验台，柴油机机组配合安装至第一底座的第一安装平面，使得柴油机机组的输出轴的轴线与第一水平方向具有0°至6.22°的倾斜角度，并且柴油机机组的输出轴通过连接组件连接至输入轴的轴线水平设置的测功器，从而能够对倾斜设置的柴油机机组进行试验测试，从而能够很大程度地模拟柴油机机组的船用使用状态，试验效果好。
Smart Images
Figure CN224667280U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates generally to the technical field of diesel engine test benches, and more specifically to a test bench for marine diesel engine units. Background Technology
[0002] Currently, in existing technologies, the land-based test benches for marine diesel engines are generally horizontally set up, with the engine unit's shaft system connected to the test bench's dynamometer in a horizontal direction. However, the horizontally set diesel engine unit does not closely resemble the actual marine environment and cannot accurately simulate the actual marine operating conditions of the marine diesel engine unit, resulting in unsatisfactory test results. Utility Model Content
[0003] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.
[0004] To at least partially solve the above problems, this utility model provides a test bench for marine diesel engine units, the test bench comprising:
[0005] A dynamometer, the dynamometer being used as the power-consuming load of the diesel engine unit, wherein the axis of the input shaft of the dynamometer is parallel to a first horizontal direction;
[0006] A connecting assembly for connecting to the output shaft of the diesel engine unit and to the input shaft of the dynamometer;
[0007] The base assembly includes a first base and a second base, which are spaced apart along the first horizontal direction. The top of the first base is configured to form a first mounting plane for mounting the diesel engine unit. The first mounting plane has an inclination angle of 0° to 6.5° with respect to the horizontal plane containing the first horizontal direction. The second base is mounted to the connecting assembly.
[0008] According to the test bench for marine diesel engine units of this utility model, the diesel engine unit is installed on the first mounting plane of the first base, so that the axis of the output shaft of the diesel engine unit has an inclination angle of 0° to 6.22° with the first horizontal direction. The output shaft of the diesel engine unit is connected to a dynamometer set horizontally on the axis of the input shaft through a connecting assembly, thereby enabling the test of the inclined diesel engine unit, which can simulate the marine use state of the diesel engine unit to a large extent and achieve good test results.
[0009] Optionally, the tilt angle is configured to be 3.2° to 3.6°, or the tilt angle is configured to be 6° to 6.4°.
[0010] Optionally, the base assembly further includes a first inclined base, the first inclined base including a first base plate, a first upright plate, a first stiffener and a first inclined plate, the first base plate being horizontally disposed, the first inclined plate having the inclination angle with the first horizontal direction; the first upright plate being connected to the first base plate and the first inclined plate in a vertical direction, and the first stiffener being connected to the side wall of the first upright plate;
[0011] The first base is connected to the top surface of the first inclined plate.
[0012] Optionally, the connecting assembly includes a gearbox, an intermediate support, and a universal joint. Along the first horizontal direction from the diesel engine unit to the dynamometer, the gearbox, the intermediate support, and the universal joint are arranged in sequence and connected together. The gearbox is used to connect to the diesel engine unit, and the universal joint is used to connect to the dynamometer.
[0013] Optionally, the second base includes a first base body and a second base body, the first base body being configured to form a second mounting plane that is fitted to the gearbox, and the second base body being configured to form a third mounting plane that is fitted to the intermediate bracket; both the second mounting plane and the third mounting plane are parallel to the first mounting plane.
[0014] Optionally, the first seat and the second seat are connected as one unit.
[0015] Optionally, the base assembly further includes a second inclined base, the second inclined base including a second base plate, a second upright plate, a second stiffener and a second inclined plate, the second base plate being horizontally disposed, the second inclined plate having the inclination angle with the first horizontal direction; the second upright plate being vertically connected to the second base plate and the second inclined plate, and the second stiffener being connected to the side wall of the second upright plate;
[0016] The first seat and the second seat are connected to the top surface of the second inclined plate.
[0017] Optionally, the base assembly includes two first bases, which are spaced apart along a second horizontal direction perpendicular to the first horizontal direction, and are used to be fitted to both sides of the bottom of the diesel engine unit.
[0018] Optionally, the dynamometer is configured as a hydraulic dynamometer.
[0019] Optionally, the test bench further includes at least three guide rails, which are laid on the ground; the first base, the second base, and the dynamometer are all fitted to the guide rails and connected to the ground by fasteners. Attached Figure Description
[0020] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings,
[0021] Figure 1 This is a front view of a test bench for a marine diesel engine unit according to a preferred embodiment of the present invention.
[0022] Figure 2 for Figure 1 A three-dimensional schematic diagram of the first base in the diagram;
[0023] Figure 3 for Figure 1 A front view of the first base in the middle;
[0024] Figure 4 for Figure 1 A three-dimensional schematic diagram of the second base; and
[0025] Figure 5 for Figure 1 The front view of the second base in the image.
[0026] Explanation of reference numerals in the attached figures
[0027] 100: Test bench; 110: dynamometer
[0028] 111: Dynamometer base; 120: Connecting components
[0029] 121: Gearbox 122: Intermediate support
[0030] 123: Universal joint; 124: High-elasticity coupling
[0031] 125: Diaphragm coupling; 126: First transition flange
[0032] 127: Second transition flange; 130: Base assembly
[0033] 131: First base 132: Second base
[0034] 133: First tilted base; 134: First seat body
[0035] 135: Second seat body; 136: Second inclined base
[0036] 137: First base plate 138: First vertical plate
[0037] 139: First stiffening plate; 140: First inclined plate
[0038] 141: Second base plate 142: Second vertical plate
[0039] 143: Second stiffening plate; 144: Second inclined plate
[0040] 145: Third base plate 146: Third vertical plate
[0041] 147: Third stiffening slab; 148: First top slab
[0042] 149: First mounting panel; 150: First mounting plane
[0043] 151: First horizontal panel; 152: Third mounting panel
[0044] 153: Fourth upright board; 154: Fourth stiffening board
[0045] 155: Second horizontal plate; 156: Second mounting panel
[0046] 157: Second mounting plane; 158: Third mounting plane
[0047] 159: Fifth vertical board; 160: Fifth stiffening board
[0048] 161: Third horizontal plate 162: Second top plate
[0049] 170: Diesel engine unit 171: Engine feet
[0050] 180: Guide rail; 190: Mounting hole
[0051] D1: First horizontal direction; D2: Second horizontal direction
[0052] D3: Vertical direction Detailed Implementation
[0053] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.
[0054] In this document, ordinal numbers such as "first" and "second" used in this invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."
[0055] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.
[0056] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.
[0057] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.
[0058] In some special vessels, or where the connection between the diesel engine unit 170 and the propeller shaft requires a certain angle (such as in high-speed boats or V-drive vessels), or in vessels that may be in a tilted state for extended periods during navigation (such as trawlers), the marine diesel engine unit 170 may be designed with an inclination. Since dynamometer equipment generally cannot be used at an inclination, a test bench 100 for the marine diesel engine unit 170, according to this utility model, is proposed to meet the installation requirements for testing such marine diesel engine units 170.
[0059] Figures 1 to 5 A test bench 100 for a marine diesel engine unit 170 is shown. The test bench 100 includes a dynamometer 110, a connecting assembly 120, and a base assembly 130. The dynamometer 110 serves as the power-consuming load of the diesel engine unit 170, and the axis of the input shaft of the dynamometer 110 is parallel to a first horizontal direction D1. The connecting assembly 120 is used to connect to the output shaft of the diesel engine unit 170 and to the input shaft of the dynamometer 110. The base assembly 130 includes a first base 131 and a second base 132, which are spaced apart along the first horizontal direction D1. The top of the first base 131 is configured to form a first mounting plane 150 for mounting the diesel engine unit 170. The first mounting plane 150 has an inclination angle h1 of 0° to 6.5° with the horizontal plane containing the first horizontal direction D1. The second base 132 is fitted to the connecting assembly 120.
[0060] According to the test bench 100 of the marine diesel engine unit 170 of this utility model, the diesel engine unit 170 is installed on the first mounting plane 150 of the first base 131, so that the axis of the output shaft of the diesel engine unit 170 has an inclination angle of 0° to 6.5° (excluding 0°) with the horizontal plane where the first horizontal direction D1 is located. The output shaft of the diesel engine unit 170 is connected to the dynamometer 110, which is horizontally set on the axis of the input shaft, through the connecting assembly 120. Thus, the inclined diesel engine unit 170 can be tested, thereby simulating the marine use state of the diesel engine unit 170 to a large extent, and the test effect is good.
[0061] Reference Figure 1 To ensure that the output shaft of the inclined diesel engine unit 170 is ultimately connected to the input shaft of the horizontally positioned dynamometer 110, the connecting assembly 120 includes a gearbox 121, an intermediate support 122, and a universal joint 123. Along the first horizontal direction D1 from the diesel engine unit 170 to the dynamometer 110 (i.e.... Figure 1 From right to left, the gearbox 121, intermediate support 122, and universal joint 123 are arranged and connected together. The gearbox 121 is connected to the diesel engine unit 170, and the universal joint 123 is connected to the dynamometer 110. This allows the power from the diesel engine unit 170 to be transmitted sequentially through the gearbox 121, intermediate support 122, and universal joint 123 to the dynamometer 110, enabling testing of the diesel engine unit 170. The universal joint 123 ensures that the shaft system for testing power transitions from an inclined state at the output shaft of the diesel engine unit 170 to a horizontal state at the input shaft of the dynamometer 110, thus largely simulating the marine operating conditions of the diesel engine unit 170 and achieving good test results. The intermediate support, as a transitional connection between the gearbox 121 and the universal joint 123, stabilizes the shaft system for testing power.
[0062] Optionally, refer to Figure 1 The connecting assembly 120 also includes a high-elasticity coupling 124 and a diaphragm coupling 125. The high-elasticity coupling 124 is located between the output shaft of the diesel engine unit 170 and the gearbox 121, making the connection between the diesel engine unit 170 and the gearbox 121 elastic, thereby reducing wear at the connection point between the diesel engine unit 170 and the gearbox 121 during testing. The diaphragm coupling 125 is located between the gearbox 121 and the intermediate support 122. The intermediate support 122 has bearings and a shaft system. The two ends of the diaphragm coupling 125 are respectively connected to the output shaft of the gearbox 121 and the shaft system of the intermediate support 122. Through the diaphragm coupling 125, excessive torque transmitted by the gearbox 121 can be prevented from damaging the shaft system and subsequent components (intermediate support, universal joint 123, and dynamometer 110).
[0063] Optionally, refer to Figure 1 The universal joint 123 has a first transition flange 126 and a second transition flange 127 at both ends. The first transition flange 126 is connected to the shaft system of the intermediate support 122 by fasteners, and the second transition flange 127 is connected to the input shaft of the dynamometer 110 by fasteners, thereby changing the shaft system of the test power from inclined to horizontal, so that the dynamometer 110 can test the diesel engine unit 170.
[0064] Optionally, the dynamometer 110 is configured as a hydraulic dynamometer 110, which has a lower modification cost compared to the scheme of using a generator and dry load as the power consumption device, and is suitable for most marine engine unit test benches 100.
[0065] Optionally, combined Figure 2 and Figure 3 As shown, the tilt angle h1 between the first mounting plane 150 and the horizontal plane containing the first horizontal direction D1 can be configured to be 3.2° to 3.6°, and preferably 3.4°. Optionally, in conjunction with... Figure 2 and Figure 3 As shown, the tilt angle h1 between the first mounting plane 150 and the horizontal plane where the first horizontal direction D1 is located can also be configured to be 6° to 6.4°. The tilt angle h1 between the first mounting plane 150 and the horizontal plane where the first horizontal direction D1 is located is preferably 6.22°, which can simulate the installation and use conditions of the marine diesel engine unit 170 to a large extent.
[0066] Optionally, refer to Figure 2 and Figure 3 The base assembly 130 further includes a first inclined base 133, which includes a first base plate 137, a first upright plate 138, a first stiffening plate 139, and a first inclined plate 140. The first base plate 137 is horizontally positioned, and the first inclined plate 140 has an inclination angle with the first horizontal direction D1, and the inclination angle of the first inclined plate 140 is consistent with the inclination angle of the first mounting plane 150. The first upright plate 138 is parallel to the first horizontal direction D1 and the vertical direction D3, and the first upright plate 138 is connected to the first base plate 137 and the first inclined plate 140 along the vertical direction D3. The first stiffening plate 139 is connected to the side wall of the first upright plate 138 to strengthen the structural strength of the first upright plate 138. Optionally, the first stiffening plate 139 is connected to the first floor and the first inclined plate 140 along the vertical direction D3, thereby making the first inclined base 133 more stable.
[0067] Optionally, the first base plate 137, the first upright plate 138, the first stiffening plate 139, and the first inclined plate 140 are welded together to form the first inclined base 133, which has a stable structure, good load-bearing capacity, and low manufacturing cost.
[0068] Optionally, the first base 131 is connected to the top surface of the first inclined plate 140, thereby making the first mounting plane 150 inclined at an angle to the horizontal plane containing the first horizontal direction D1. Furthermore, the first base 131 can be welded to the top surface of the first inclined plate 140 as a whole, resulting in a stable structure.
[0069] Optionally, the first base 131 may also have mounting holes 190 corresponding to the first inclined plate 140, so that the first base 131 can be detachably connected to the first inclined base 133 by fasteners. The first base 131 may be the base of the horizontally arranged diesel engine test bench 100. Thus, by arranging the first inclined base 133, the first base 131 used to install the diesel engine unit 170 is inclined, so that the horizontally arranged diesel engine test bench 100 can be directly used for modification, which greatly reduces the modification cost of the test bench 100 for the marine diesel engine unit 170 according to this utility model.
[0070] Specifically, let's look at the structure of the first base 131.
[0071] Optionally, refer to Figure 2 and Figure 3 The first base 131 includes a third base plate 145, a third upright plate 146, a third stiffening plate 147, a first top plate 148, a first mounting panel 149, and a first horizontal plate 151. The third base plate 145 is connected to the first inclined plate 140. The first top plate 148 is parallel to the third base plate 145 and spaced apart along the vertical direction D3. The third upright plate 146 is parallel to the first horizontal direction D1 and the vertical direction D3, and is connected to the third base plate 145 and the first top plate 148 along the vertical direction D3. The first horizontal plate 151 is parallel to the first top plate 148, and multiple first horizontal plates 151 are spaced apart along the vertical direction D3 between the first top plate 148 and the third base plate 145, and the first horizontal plates 151 are connected to the side wall of the first upright plate 138. The third stiffening plate 147 is perpendicular to the first horizontal plate 151, and multiple third stiffening plates 147 and multiple first horizontal plates 151 form a grid structure between the third bottom plate 145 and the first top plate 148. The third stiffening plate 147 is connected to the side wall of the third vertical plate 146, and also to the third bottom plate 145 and the first top plate 148. The third bottom plate 145, the third vertical plate 146, the third stiffening plate 147, the first top plate 148, and the first horizontal plate 151 are connected together to form the main structure of the first base 131, which is stable, has good load-bearing capacity, and low manufacturing cost. Optionally, the third bottom plate 145, the third vertical plate 146, the third stiffening plate 147, the first top plate 148, and the first horizontal plate 151 can be welded together.
[0072] Optionally, the first mounting panel 149 is disposed above the first top plate 148, and the first mounting panel 149 is connected to the top surface of the first top plate 148, in conjunction with... Figure 1 As shown, the first mounting panel 149 is provided with mounting holes 190 for mounting to the engine mounts 171 of the diesel engine unit 170, thereby securing the diesel engine unit 170. Furthermore, the top surface of the first mounting panel 149 is the first mounting plane 150, combined with... Figure 3 As shown, this results in the first mounting plane 150 having an angle h1 with the horizontal plane where the first horizontal direction D1 is located.
[0073] Optionally, refer to Figure 1 and Figure 2 The base assembly 130 includes two first bases 131, both of which are mounted to a first inclined base 133. The two first bases 131 are spaced apart along a second horizontal direction D2 perpendicular to the first horizontal direction D1. The two first bases 131 are used to cooperate with the engine feet 171 on both sides of the bottom of the diesel engine unit 170, thereby stably supporting and fixing the diesel engine unit 170.
[0074] To be more specific, let's look at the structure of the second base 132.
[0075] Optionally, refer to Figure 1 and Figure 4 The second base 132 includes a first base 134 and a second base 135. The first base 134 is configured to form a second mounting plane 157 that is fitted to the gearbox 121, and the second base 135 is configured to form a third mounting plane 158 that is fitted to the intermediate support 122. Both the second mounting plane 157 and the third mounting plane 158 are parallel to the first mounting plane 150, such that the second mounting plane 157 has an inclination angle h2 with the horizontal plane, the third mounting plane 158 has an inclination angle h3 with the horizontal plane, and the first mounting plane 150 has an inclination angle h1 with the horizontal plane (see...). Figure 3 The gearbox 121 and the intermediate support 122 are kept in alignment with the second base 132 so that the gearbox 121 and the intermediate support 122 can be mounted, and the shaft system of the gearbox 121 and the intermediate support 122 can be tilted at an angle to the horizontal plane where the first horizontal direction D1 is located.
[0076] Optionally, the first base 134 and the second base 135 are connected as one unit, thereby making the installation between the gearbox 121 and the intermediate support more precise, the structural strength of the second base 132 higher, and the power transmission between the gearbox 121 and the intermediate support more stable.
[0077] Optionally, combined Figure 5As shown, the base assembly 130 further includes a second inclined base 136, which includes a second base plate 141, a second upright plate 142, a second stiffening plate 143, and a second inclined plate 144. The second base plate 141 is horizontally positioned, and the second inclined plate 144 has an inclination angle with the horizontal plane containing the first horizontal direction D1, and is arranged above the second base plate 141 along the vertical direction D3. The second upright plate 142 is parallel to the first horizontal direction D1 and the vertical direction D3, and is connected to the second base plate 141 and the second inclined plate 144 along the vertical direction D3. The second stiffening plate 143 is connected to the side wall of the second upright plate 142, and is also connected to the second base plate 141 and the second inclined plate 144, thereby giving the second inclined base 136 good structural strength.
[0078] Optionally, the first base 134 and the second base 135 are connected to the top surface of the second inclined plate 144, so that the second mounting plane 157 and the third mounting plane 158 have an inclination angle with the horizontal plane containing the first horizontal direction D1. The first base 134 and the second base 135 can be welded to the second inclined plate 144, which results in a stable structure and good integration.
[0079] Specifically, regarding the structure of the first seat 134 and the second seat 135.
[0080] Optionally, refer to Figure 4 and Figure 5 The first base 134 includes a fourth vertical plate 153, a fourth stiffening plate 154, a second horizontal plate 155, and a second mounting panel 156. The second horizontal plate 155 is parallel to the second inclined plate 144 and spaced apart from the second inclined plate 144 along the vertical direction D3. The fourth vertical plate 153 and the fourth stiffening plate 154 both extend along the vertical direction D3, and the fourth vertical plate 153 and the fourth stiffening plate 154 are set at an angle and connected together, thereby forming a grid structure on the side of the first base 134. The fourth vertical plate 153 is connected to the second horizontal plate 155 and the fourth stiffening plate 154 respectively, which strengthens the structural strength of the first base 134. The second mounting panel 156 is parallel to the second inclined plate 144 and arranged above the second inclined plate 144 along the vertical direction D3. The fourth vertical plate 153 is connected to the bottom surface of the second mounting panel 156 and the second inclined plate 144 along the vertical direction D3. The second mounting panel 156 is provided with mounting holes 190 for mounting the gearbox 121. The top surface of the second mounting panel 156 is constructed as a second mounting plane 157, thereby creating an inclination angle h2 between the second mounting plane 157 and the horizontal plane.
[0081] Optionally, refer to Figure 4 and Figure 5The second base 135 includes a fifth vertical plate 159, a fifth stiffening plate 160, a third horizontal plate 161, a second top plate 162, and a third mounting panel 152. The second top plate 162 is parallel to the second inclined plate 144 and spaced apart from the second inclined plate 144 along the vertical direction D3. The fifth vertical plate 159 is parallel to the vertical direction D3 and the first horizontal direction D1 and is connected to the second top plate 162 and the second inclined plate 144 along the vertical direction D3. The third horizontal plate 161 is parallel to the second top plate 162 and arranged vertically D3 between the second top plate 162 and the second inclined plate 144. The fifth stiffening plate 160 is perpendicular to the second top plate 162 and is also arranged between the second top plate 162 and the second inclined plate 144. The third horizontal plate 161 and the fifth stiffening plate 160 are connected together to form a grid structure. Both the third horizontal plate 161 and the fifth stiffening plate 160 are connected to the side wall of the fifth vertical plate 159, and the fifth stiffening plate 160 is connected to the second top plate 162 and the second inclined plate 144, thereby strengthening the structural strength of the second base 135. The third mounting panel 152 is connected to the top surface of the second top plate 162, and the third mounting panel 152 is provided with mounting holes 190 for mounting the intermediate support 122. The top surface of the third mounting panel 152 is constructed as a third mounting plane 158, so that the third mounting plane 158 has an inclination angle h3 with the horizontal plane.
[0082] Optionally, the test bench 100 further includes at least three guide rails 180, which are laid on the ground and arranged at intervals along a first horizontal direction D1. A first base 131 is fitted to the guide rail 180 via a first inclined base 133 and connected to the ground via fasteners. A second base 132 (including a first seat body 134 and a second seat body 135) is fitted to the guide rail 180 via a second inclined base 136 and connected to the ground via fasteners. A dynamometer 110 is fitted to the guide rail 180 via a dynamometer base 111 and connected to the ground via fasteners, facilitating installation and ensuring high installation accuracy.
[0083] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.
[0084] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.
Claims
1. A test bench for marine diesel engine units, characterized in that, The test bench includes: A dynamometer, the dynamometer being used as the power-consuming load of the diesel engine unit, wherein the axis of the input shaft of the dynamometer is parallel to a first horizontal direction; A connecting assembly for connecting to the output shaft of the diesel engine unit and to the input shaft of the dynamometer; The base assembly includes a first base and a second base, which are spaced apart along the first horizontal direction. The top of the first base is configured to form a first mounting plane for mounting the diesel engine unit. The first mounting plane has an inclination angle of 0° to 6.5° with respect to the horizontal plane containing the first horizontal direction. The second base is mounted to the connecting assembly.
2. The test bench for marine diesel engine units according to claim 1, characterized in that, The tilt angle is configured to be 3.2° to 3.6°, or 6° to 6.4°.
3. The test bench for marine diesel engine units according to claim 1, characterized in that, The base assembly further includes a first inclined base, the first inclined base including a first base plate, a first upright plate, a first stiffener plate and a first inclined plate, the first base plate being horizontally disposed, the first inclined plate having the inclination angle with the first horizontal direction; the first upright plate being connected to the first base plate and the first inclined plate in a vertical direction, and the first stiffener plate being connected to the side wall of the first upright plate. The first base is connected to the top surface of the first inclined plate.
4. The test bench for marine diesel engine units according to claim 1, characterized in that, The connecting assembly includes a gearbox, an intermediate support, and a universal joint. Along the first horizontal direction from the diesel engine unit to the dynamometer, the gearbox, the intermediate support, and the universal joint are arranged in sequence and connected together. The gearbox is used to connect to the diesel engine unit, and the universal joint is used to connect to the dynamometer.
5. The test bench for marine diesel engine units according to claim 4, characterized in that, The second base includes a first base body and a second base body. The first base body is configured to form a second mounting plane that is fitted to the gearbox, and the second base body is configured to form a third mounting plane that is fitted to the intermediate bracket. Both the second mounting plane and the third mounting plane are parallel to the first mounting plane.
6. The test bench for marine diesel engine units according to claim 5, characterized in that, The first base and the second base are connected as one unit.
7. The test bench for marine diesel engine units according to claim 6, characterized in that, The base assembly further includes a second inclined base, which includes a second base plate, a second upright plate, a second stiffening plate, and a second inclined plate. The second base plate is horizontally arranged, and the second inclined plate has the inclination angle with the first horizontal direction. The second upright plate is connected to the second base plate and the second inclined plate in a vertical direction, and the second stiffening plate is connected to the side wall of the second upright plate. The first seat and the second seat are connected to the top surface of the second inclined plate.
8. The test bench for marine diesel engine units according to claim 1, characterized in that, The base assembly includes two first bases, which are spaced apart along a second horizontal direction perpendicular to the first horizontal direction, and are used to be fitted to both sides of the bottom of the diesel engine unit.
9. The test bench for marine diesel engine units according to claim 1, characterized in that, The dynamometer is configured as a hydraulic dynamometer.
10. The test bench for marine diesel engine units according to claim 1, characterized in that, The test bench also includes at least three guide rails, which are laid on the ground; the first base, the second base, and the dynamometer are all fitted to the guide rails and connected to the ground by fasteners.