Multi-station diesel engine test system

Abstract

The application discloses a multi-station diesel engine test running system, which is applied to the technical field of diesel engine test running and comprises a test running production line and a test running system. The test running production line comprises a conveying belt, a first station, a plurality of second stations, a controller, a first detection mechanism, a second detection mechanism and a diesel engine. The test running system is arranged in the controller. The first detection mechanism comprises a dynamometer, a plurality of vibration sensors, a plurality of noise sensors and a plurality of cylinder three. The dynamometer drives the diesel engine to idle without combustion in the cold running-in stage. The vibration sensors are used for acquiring vibration amplitudes at different positions of the diesel engine during test running. The noise sensors are used for acquiring sound decibel values at different positions of the diesel engine during test running. The test running system comprises an acquisition module, an analysis module and a warning module. The acquisition module is electrically connected with the first detection mechanism and the second detection mechanism. The application can improve the test running efficiency of the diesel engine.

Description

Technical Field

[0001] This invention relates to the field of diesel engine testing technology, specifically a multi-station diesel engine testing system. Background Technology

[0002] A diesel engine test system is an integrated set of equipment and facilities specifically designed for comprehensive performance testing, verification, and adjustment of diesel engines. Its core purpose is to simulate various operating conditions of the engine in real-world applications in a controllable, measurable, and repeatable environment to evaluate its performance, reliability, emissions, fuel consumption, and other key indicators, ensuring that it meets design specifications, factory quality requirements, or post-repair performance standards.

[0003] However, the existing diesel engine test process generally adopts the "cold break-in-hot break-in" series mode. The cold break-in relies on manual use of a listening stick to identify abnormal noises and then on experience to judge the abnormality. When the ambient noise exceeds a certain decibel, the missed detection rate increases exponentially. The detection method is primitive, slow to respond, and inefficient.

[0004] Therefore, it is necessary to provide a multi-station diesel engine test system to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-station diesel engine test system to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-station diesel engine test system, including a test production line and a test system, wherein the test production line includes a conveyor belt, a station one, several stations two, a controller, a testing mechanism one, a testing mechanism two, and a diesel engine, and the test system is set inside the controller;

[0007] The testing mechanism includes a dynamometer, several vibration sensors, several noise sensors, and several cylinders. During the cold break-in period, the dynamometer drives the motor to drive the diesel engine to idle without combustion. The vibration sensors are used to obtain the vibration amplitude at different positions during the test run of the diesel engine, and the noise sensors are used to obtain the sound decibel value at different positions during the test run of the diesel engine.

[0008] The test system includes a data acquisition module, an analysis module, and an alarm module. The data acquisition module is electrically connected to detection mechanism one and detection mechanism two. The data acquisition module is used to acquire relevant data such as sound decibels, vibrations, and temperatures detected by detection mechanism one and detection mechanism two. The analysis module is used to determine and analyze the abnormal points of the diesel engine test based on the sound decibels, vibration data, and temperature acquired by the data acquisition module. The alarm module is used to provide alarm prompts after the abnormal points are determined.

[0009] According to the above technical solution, the first workstation includes a frame and a support component. The support component is disposed inside the frame, and a side support is fixedly connected to the side of the frame. Several second workstations are disposed on the side of the first workstation that has the side support.

[0010] The side support is fixedly connected to the top of the single-axis moving base two, the dynamometer is fixed to the top of the single-axis moving base two, and the output end of the dynamometer is fixedly connected to the chuck.

[0011] According to the above technical solution, the support assembly includes two sets of cylinder one, a support plate, a top plate and cylinder two. A lifting frame is provided between the two sets of cylinder one. The top of the two sets of cylinder one is fixedly connected to the lifting frame. The top of the lifting frame is fixedly connected to the support plate. The support plate is provided with four sets of limiting holes.

[0012] According to the above technical solution, four sets of limiting parts are fixedly connected to the side of the lifting frame. Each limiting part includes two sets of limiting wheels and a limiting rod. The two sets of limiting wheels are vertically fixed to the side of the lifting frame, and the limiting rod is fixed to the inner wall of the frame. The limiting wheel is in contact with the limiting rod, and the outer ring of the limiting wheel is provided with a groove that matches the diameter of the limiting rod.

[0013] According to the above technical solution, the top plate is fixed to the top of the frame, the second cylinder is fixed to the top of the top plate, the output end of the second cylinder is fixedly connected to the lifting plate through the top plate, two sets of guide rods are fixedly connected to the top of the lifting plate, the guide rods are slidably connected to the top plate through the top plate, and the four corners of the top plate are fixedly connected to the second guide rods, the guide rods are slidably connected to the lifting plate through the lifting plate, the four sets of second guide rods correspond to the positions of the four sets of limiting holes on the support plate, and the lower ends of the four sets of second guide rods are slidably connected to the bottom plate.

[0014] According to the above technical solution, the top of the base plate is fixedly connected to support seat one and support seat two, the bottom of the lifting plate is fixedly connected to support seat three, support seat one is located on the side of the single-axis moving seat one away from the dynamometer, and support seat two is located on the side of the single-axis moving seat one away from the conveyor belt.

[0015] Two sets of cylinders are fixed to the side of the support base one near the single-axis moving base one, part of the cylinders are fixed to the side of the support base two near the single-axis moving base one, and the remaining part of the cylinders are fixed to the bottom of the support base three. The two sets of cylinders on the support base one are respectively fixedly connected to a vibration sensor and a noise sensor. The output end of the cylinders on the support base two is fixedly connected to a vibration sensor, and the output end of the cylinders on the support base three is fixedly connected to a noise sensor.

[0016] According to the above technical solution, a single-axis movable seat is fixedly connected to the top of the base plate, and a fixed seat is adsorbed above the single-axis movable seat using a negative pressure adsorption device. A groove is provided on the top of the fixed seat.

[0017] A temperature sensor is also fixedly connected above the side of the second support base facing the first single-axis moving base.

[0018] A camera is fixedly connected to the side of the frame closest to the dynamometer.

[0019] According to the above technical solution, the structure and connection relationship of workstation two are the same as those of workstation one;

[0020] The second testing mechanism is located within the second workstation. The second testing mechanism has the same structure and connection relationship as the first testing mechanism.

[0021] According to the above technical solution, the number of vibration sensors and noise sensors is at least the same as the sum of the number of cylinders and the number of ends of the diesel engine to be tested, and the vibration sensors and noise sensors are set at least one-to-one.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are: by setting vibration sensors and noise sensors, the present invention can ensure full coverage of key points, and at the same time, the vibration points and noise points are spatially mapped and correlated with each other, thereby improving the accuracy of fault correlation analysis.

[0023] By setting up a dynamometer and a single-axis moving base, automatic alignment with the diesel engine shaft can be achieved. Combined with a chuck, it can further be compatible with different shaft diameters, solving the problem of rapid adaptation to multiple diesel engine models.

[0024] By setting up station one and multiple stations two, and using a conveyor belt in series, a production line-style automated test run can be achieved. At the same time, by utilizing the time difference between cold break-in at station one and hot break-in at station two, the test run effect of the diesel engine can be improved. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of a portion of the workstation structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the support component structure of the present invention;

[0029] Figure 4 This is a rear view schematic diagram of a portion of the workstation structure of the present invention;

[0030] Figure 5 This is the invention Figure 2 Enlarged structural diagram of region A in the middle;

[0031] Figure 6 This is a schematic diagram of the test system operation process of the present invention;

[0032] Figure 7 This is a schematic diagram of the test system for determining abnormal points according to the present invention;

[0033] In the picture: 1. Conveyor belt;

[0034] 2. Workstation 1; 21. Frame; 22. Side support; 23. Cylinder 1; 24. Lifting frame; 25. Limiting wheel; 26. Limiting rod; 27. Support plate; 28. Top plate; 29. ​​Cylinder 2; 210. Guide rod 1; 211. Guide rod 2; 212. Lifting plate; 213. Base plate; 214. Single-axis moving seat 1; 215. Fixed seat;

[0035] 3. Workstation 2; 4. Controller;

[0036] 5. Testing mechanism one; 51. Dynamometer; 52. Vibration sensor; 53. Noise sensor; 54. Single-axis moving base two; 55. Chuck; 56. Support base one; 57. Support base two; 58. Support base three; 59. Cylinder three; 510. Temperature sensor; 511. Camera;

[0037] 6. Testing agency two; 7. Diesel engine; 8. Vibration point; 9. Noise point; 10. Verification ball. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1-7This invention provides a technical solution: a multi-station diesel engine test system, including a test production line and a test system. The test production line includes a conveyor belt 1, station 1 2, several stations 2 3, a controller 4, a testing mechanism 1 5, a testing mechanism 2 6, and a diesel engine 7. The conveyor belt 1 is used to transport the diesel engine 7. Station 1 2 is used for cold break-in of the diesel engine 7, during which the diesel engine 7 uses external drive and operates without combustion. The several stations 2 3 are used for hot break-in of the diesel engine 7, during which the diesel engine 7 is in combustion operation. The test system is located inside the controller 4. The controller 4 is used by the operator to manually control the diesel engine 7 at stations 1 2 and several stations 2 3 for test runs. At the same time, the test system acquires relevant test data, identifies abnormal points in the diesel engine 7 test runs, and provides abnormal feedback.

[0040] Specifically, such as Figure 2 and Figure 3 As shown, station 1 2 includes a frame 21 and a support assembly. The support assembly is located inside the frame 21 and is used to support and fix the diesel engine 7 to be tested. A side support 22 is fixedly connected to the side of the frame 21. Several stations 2 3 are located on the side of station 1 2 where the side support 22 is located.

[0041] Furthermore, such as Figure 2 and Figure 3 As shown, the support assembly includes two sets of cylinders 23, a support plate 27, a top plate 28, and a second set of cylinders 29. A lifting frame 24 is provided between the two sets of cylinders 23. The tops of the two sets of cylinders 23 are fixedly connected to the lifting frame 24. The top of the lifting frame 24 is fixedly connected to the support plate 27. Four sets of limiting holes are provided on the support plate 27.

[0042] Four sets of limiting parts are fixedly connected to the side of the lifting frame 24. The limiting parts include two sets of limiting wheels 25 and limiting rods 26. The two sets of limiting wheels 25 are vertically fixed to the side of the lifting frame 24, and the limiting rods 26 are fixed to the inner wall of the frame 21. The limiting wheels 25 are in contact with the limiting rods 26. The outer ring of the limiting wheels 25 is provided with a groove that matches the diameter of the limiting rods 26. When the cylinder 23 starts to extend and retract, it drives the lifting frame 24 to rise and fall synchronously. At this time, the limiting rods 26 are located in the grooves of the limiting wheels 25, and the limiting wheels 25 are in contact with the limiting rods 26. Thus, the limiting wheels 25 can roll along the setting direction of the limiting rods 26. Without affecting the normal lifting and lowering of the lifting frame 24, the limiting of the lifting frame 24 is achieved, ensuring the stability of the lifting frame 24 during lifting and lowering.

[0043] The top plate 28 is fixed to the top of the frame 21. The second cylinder 29 is fixed to the top of the top plate 28. The output end of the second cylinder 29 passes through the top plate 28 and is fixedly connected to a lifting plate 212. Two sets of guide rods 210 are fixedly connected to the top of the lifting plate 212, passing through the top plate 28 and slidably connected to it. Guide rods 211 are fixedly connected to the four corners of the top plate 28, passing through the lifting plate 212 and slidably connected to it. The positions of the four sets of guide rods 211 and the four sets of limiting holes on the support plate 27 are aligned. The lower ends of the four sets of guide rods 211 are slidably connected to the base plate 213. Under the action of its own weight and the weight of the components placed above it, the base plate 213 is located at the bottom of the guide rods 211. When the cylinder 23 starts to extend, it drives the lifting frame 24 to rise, which in turn drives the support plate 27 to rise, so that the guide rods 211 enter the through holes on the support plate 27. Gradually, the support plate 27 comes into contact with the base plate 213 and drives the base plate 213 to rise synchronously, thereby driving the components on the base plate 213 to rise synchronously, so as to achieve the effect of adjusting the height.

[0044] A single-axis movable seat 214 is fixedly connected to the top of the base plate 213. A fixed seat 215 is attached above the single-axis movable seat 214 using a negative pressure adsorption device. A slot is provided on the top of the fixed seat 215. The diesel engine 7 is fixed in the slot of the fixed seat 215 by fasteners, so that the diesel engine 7 remains stable during the test run.

[0045] It should be noted that sound insulation panels are provided on the three sides of the frame 21 that are not adjacent to the conveyor belt 1, which reduces the impact on the test results of the diesel engine 7 at the adjacent workstation, thereby improving the accuracy of the test results; the conveying direction of the single-axis moving seat 214 is perpendicular to the transmission direction of the conveyor belt 1.

[0046] Specifically, such as Figure 2 , Figure 4 and Figure 5 As shown, the testing mechanism 5 includes a dynamometer 51, several vibration sensors 52, several noise sensors 53, and several cylinders 59. During the cold break-in stage, the dynamometer 51 drives the motor to run the diesel engine 7 without combustion. During the hot break-in stage, a gradual load is applied to verify the combustion stability. The several vibration sensors 52 are used to obtain the vibration amplitude at different positions of the diesel engine 7 during the test run, and the several noise sensors 53 are used to obtain the sound decibel value at different positions of the diesel engine 7 during the test run.

[0047] It should be noted that the vibration sensor 52 adopts contact detection. The number of vibration sensors 52 and noise sensors 53 is at least the same as the sum of the number of cylinders and the number of ends of the diesel engine 7 under test. The vibration sensors 52 and noise sensors 53 are set at least one-to-one. One noise sensor 53 can correspond to multiple different vibration sensors 52. That is, when the diesel engine 7 is a three-cylinder diesel engine, the sum of the number of cylinders and the number of ends of the diesel engine 7 is five, and the number of vibration sensors 52 and noise sensors 53 is at least five each.

[0048] Furthermore, such as Figure 4 As shown, a single-axis moving seat 24 is fixedly connected to the top of the side support 22. The dynamometer 51 is fixed to the top of the single-axis moving seat 24. A chuck 55 is fixedly connected to the output end of the dynamometer 51. The chuck 55 is used to conveniently connect the shaft of the diesel engine 7 to be tested, and is suitable for diesel engines 7 of different sizes and shaft diameters. The conveying direction of the single-axis moving seat 24 is the same as the conveying direction of the conveyor belt 1.

[0049] like Figure 3 and Figure 5 As shown, the top of the base plate 213 is fixedly connected to support seat 1 56 and support seat 2 57, and the bottom of the lifting plate 212 is fixedly connected to support seat 3 58. Support seat 1 56 is located on the side of the single-axis moving seat 1 214 away from the dynamometer 51, and support seat 2 57 is located on the side of the single-axis moving seat 1 214 away from the conveyor belt 1.

[0050] Two sets of cylinders 59 are fixed to the side of support base 56 near the single-axis moving base 214. Some cylinders 59 are fixed to the side of support base 27 near the single-axis moving base 214. The remaining cylinders 59 are fixed to the bottom of support base 58. The two sets of cylinders 59 on support base 56 are respectively fixedly connected to a vibration sensor 52 and a noise sensor 53. The output end of the cylinders 59 on support base 27 is fixedly connected to the vibration sensor 52. The output end of the cylinders 59 on support base 58 is fixedly connected to the noise sensor 53. The vibration sensor 52 is used to detect the vibration at different positions of the diesel engine 7. The noise sensor 53 is used to detect the sound decibel value at different positions of the diesel engine 7 during the test vehicle.

[0051] A temperature sensor 510 is also fixedly connected above the side of the support base 2 57 facing the single-axis moving base 1 214. The temperature sensor 510 is used to detect the temperature change of the diesel engine 7 during the test vehicle.

[0052] A camera 511 is fixedly connected to the side of the frame 21 near the dynamometer 51. The camera 511 is used to obtain the position and size parameters of the diesel engine 7 during the process of the single-axis moving seat 2 54 driving the diesel engine 7 to the test position, and then can control the extension and retraction of cylinder 1 23, the extension and retraction of cylinder 2 29, the extension and retraction of several cylinders 3 59, the movement of the single-axis moving seat 2 54 driving the dynamometer 51, and the opening and closing of the chuck 55.

[0053] Specifically, such as Figure 1 As shown, station 2 (3) and station 1 (2) have the same structure and connection relationship;

[0054] Testing mechanism 2 6 is located within workstation 2 3. Testing mechanism 2 6 has the same structure and connection relationship as testing mechanism 1 5. Testing mechanism 2 6 is located within workstation 2 3.

[0055] The test system includes a data acquisition module, an analysis module, and an alarm module. The data acquisition module is electrically connected to the first detection mechanism 5 and the second detection mechanism 6 to acquire relevant data such as sound decibels, vibrations, and temperatures detected by the first detection mechanism 5 and the second detection mechanism 6. The analysis module is used to determine and analyze the abnormal points of the diesel engine 7 test based on the sound decibels, vibration data, and temperature acquired by the data acquisition module. The alarm module is used to provide alarm prompts after the abnormal points are determined.

[0056] Operation mode of the test system:

[0057] Step 1: The acquisition module acquires the sound decibel and vibration data obtained by the detection mechanism 5 at workstation 2.

[0058] Specifically, the acquisition module records the point detected by the vibration sensor 52 as vibration point 8 and the point detected by the noise sensor 53 as noise point 9.

[0059] The acquisition module records the vibration amplitude detected by the vibration sensor 52 at 8 vibration points through contact as follows: , n represents the actual number of vibration sensors 52. Several vibration sensors 52 are sequentially arranged clockwise along the diesel engine 7 to be tested, starting from the side closest to the dynamometer 51. Therefore, the vibration amplitude acquired by the first vibration sensor 52 on the side closest to the dynamometer 51 is... The vibration amplitude obtained by the last vibration sensor 52, which is set clockwise along the diesel engine 7 to be tested, is ;

[0060] The acquisition module records the sound decibel data obtained by the noise sensors 53 at 9 noise points as follows: , m represents the actual number of noise sensors 53. Since one noise sensor 53 can correspond to multiple different vibration sensors 52, i.e. Several noise sensors 53 are arranged sequentially in a clockwise direction from the side closest to the dynamometer 51 along the diesel engine 7 to be tested. Therefore, the sound decibel data obtained by the first noise sensor 53 on the side closest to the dynamometer 51 is [insert value here]. The sound decibel data obtained by the last noise sensor 53, which is set clockwise along the diesel engine 7 to be tested, is: .

[0061] Step 2: The analysis module compares and judges the sound decibel data and vibration data to determine the abnormal points during the test run of diesel engine 7.

[0062] Step Two-One: The analysis module performs data analysis;

[0063] Specifically, such as Figure 6 and Figure 7 As shown, the analysis module is set with the maximum permissible vibration amplitude and maximum sound decibel during the cold break-in test of diesel engine 7. The maximum permissible vibration amplitude is denoted as... The maximum permissible sound level in decibels is denoted as .

[0064] exist At that time, the diesel engine 7 was running normally during cold break-in test, and the vibration amplitude was within the allowable range;

[0065] when At that time, the diesel engine 7 was running abnormally during cold break-in test, and the vibration amplitude exceeded the allowable range. At the same time, the analysis module counted, and the count value was N.

[0066] exist At that time, the diesel engine 7 was running normally during the cold break-in test, and the decibel level of the sound produced was within the allowable range;

[0067] when At that time, the diesel engine 7 was running abnormally during cold break-in test, and the noise level exceeded the allowable range. At the same time, the analysis module counted the noise level, and the count value was M.

[0068] Step 2-2: The analysis module identifies abnormal locations.

[0069] Specifically, when When N is the count value when the vibration exceeds the limit, N is not 0. At this time, vibration point 8 is an abnormal vibration point, and the area it is located in is an abnormal vibration area. If multiple abnormal vibration points exist, and these points are adjacent, it indicates that the abnormal vibration amplitude is caused by the interaction of multiple abnormal points within the adjacent area. If the abnormal vibration points are not adjacent, it indicates that the abnormal vibration amplitude is caused by multiple abnormal points independently, and the warning module will issue an alarm.

[0070] The method for determining the count value M is the same as the method for determining the count value N. When M is the count value when the sound decibel level exceeds the limit, M is not 0. At this time, noise point 9 is an abnormal sound point, and the area it is located in is an abnormal sound area. If multiple abnormal sound points exist, and these points are adjacent, it indicates that the abnormal sound points in the adjacent area interact with each other, and this area is the region where the abnormal sound points are located. If the multiple abnormal sound points are not adjacent, it indicates that the abnormal sound points are generated independently, and the warning module will issue an alarm.

[0071] like Figure 7 As shown, once the abnormal vibration area and the abnormal sound area are determined, if only the abnormal vibration area or the abnormal sound area exists, then the corresponding area is a single abnormal area.

[0072] If both abnormal vibration and abnormal sound regions exist simultaneously, the region with the largest abnormal vibration should be considered the one with the largest abnormal sound. The corresponding vibration point 8 is identified as the core of the vibration anomaly. The analysis module uses this point as the center and defines a verification sphere 10 with a radius of r. If all noise points 9 within the sound anomaly area are within the range of this verification sphere 10, then the vibration anomaly and sound anomaly are interacting, and vibration point 8 is considered a single vibration anomaly point. The analysis module performs continuous counting on the vibration points 8 corresponding to the identified vibration anomaly point, and the count value is... Meanwhile, the analysis module is set to use this count value. The set counting threshold K.

[0073] exist When the vibration anomalies are scattered and the causes of vibration are not fixed, the warning module will issue an alarm.

[0074] exist When the abnormal vibration point and the cause of the vibration are fixed, the warning module will issue an alarm indicating that the vibration is caused by an abnormality in the same type of component or an installation abnormality in the same part. This will facilitate targeted maintenance and subsequent process improvements by the staff at that point.

[0075] If not all noise points 9 within the abnormal sound area are within the range of the verification ball 10, then the vibration abnormality and the sound abnormality are generated independently, and there are multiple vibration points 8 or multiple noise points 9. The warning module will issue an alarm.

[0076] It should be noted that the vibration and sound decibel detection during the hot break-in stage is the same as that during the cold break-in stage. The difference is that during the hot break-in stage, the temperature sensor 510 can detect the temperature of the diesel engine 7 and issue an alarm when the temperature exceeds the limit. The specific temperature limit is determined manually, thereby separating the cold break-in and hot break-in. This prevents the wear debris generated during the cold break-in from entering the hot break-in system with the lubricating oil, causing injector sticking. During the hot break-in, the temperature rises rapidly, while the cold break-in requires a low-temperature environment, which leads to temperature control lag, abnormal wear of the piston rings, and thus causes systematic errors, increasing the probability of detection abnormalities.

[0077] The above method enables simultaneous testing of diesel engines 7 at multiple workstations, simplifying the testing process, improving the accuracy of results, and thus increasing the testing efficiency of diesel engines 7.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0079] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-station diesel engine test system, comprising a test production line and a test system, characterized in that, The test production line includes a conveyor belt (1), station one (2), several station two (3), controller (4), testing mechanism one (5), testing mechanism two (6) and diesel engine (7). The test system is set inside the controller (4). Station one (2) is used for cold running-in of the diesel engine (7), and several station two (3) are used for hot running-in of the diesel engine (7). The testing mechanism (5) is set in the workstation (2). The testing mechanism (5) includes a dynamometer (51), a number of vibration sensors (52), a number of noise sensors (53) and a number of cylinders (59). The dynamometer (51) drives the motor to drive the diesel engine (7) to run without combustion during the cold break-in stage. The vibration sensors (52) are used to obtain the vibration amplitude at different positions of the diesel engine (7) during the test run. The noise sensors (53) are used to obtain the sound decibel value at different positions of the diesel engine (7) during the test run. The test system includes a data acquisition module, an analysis module, and an alarm module. The data acquisition module is electrically connected to the first detection mechanism (5) and the second detection mechanism (6). The data acquisition module is used to acquire the sound decibels, vibrations, and temperatures detected by the first detection mechanism (5) and the second detection mechanism (6). The analysis module is used to determine and analyze the abnormal points of the diesel engine (7) test based on the sound decibels, vibration data, and temperature acquired by the data acquisition module. The alarm module is used to provide an alarm prompt after the abnormal point is determined. The operation mode of the test system: Step 1: The acquisition module acquires the sound decibel and vibration data obtained by the detection mechanism 1 (5) on the workstation 1 (2): The acquisition module records the point detected by the vibration sensor (52) as the vibration point (8) and the point detected by the noise sensor (53) as the noise point (9). The acquisition module records the vibration amplitude detected by the vibration sensor (52) at several vibration points (8) through contact as follows: , n is the actual number of vibration sensors (52) set; The acquisition module records the sound decibel data obtained by the noise sensor (53) at several noise points (9) as follows: , m is the actual number of noise sensors (53) set; Step 2: The analysis module compares and judges the sound decibel data and vibration data to determine the abnormal points during the test run of the diesel engine (7); Step 2-1: Data analysis using the analysis module: The analysis module is set with the maximum allowable vibration amplitude during the cold break-in test of the diesel engine (7). and maximum sound decibel ; when At that time, the analysis module performs a count, and the count value is N; when At that time, the analysis module performs a count, and the count value is M; Step Two: The analysis module identifies abnormal locations: Based on the quantity and continuity of N and M, the abnormal vibration area is determined. When both abnormal vibration and abnormal sound areas exist simultaneously, the area with the largest abnormal vibration point is selected. The corresponding vibration point (8) is determined as the core of the vibration anomaly. The analysis module uses this point as the center to determine a verification sphere (10) with a radius of r. Based on the situation of the noise point (9) in the sound anomaly area within the verification sphere (10), a spatial mapping relationship is established between the vibration point (8) where the vibration sensor (52) is located and the noise point (9) where the noise sensor (53) is located. Based on this mapping relationship, a correlation analysis is performed on vibration anomalies and sound anomalies that exceed the threshold to further determine the anomaly points.

2. The multi-station diesel engine test system according to claim 1, characterized in that, The first workstation (2) includes a frame (21) and a support component. The support component is located inside the frame (21). A side support (22) is fixedly connected to the side of the frame (21). Several second workstations (3) are located on the side of the first workstation (2) where the side support (22) is located. The top of the side support (22) is fixedly connected to a single-axis moving seat two (54), the dynamometer (51) is fixed to the top of the single-axis moving seat two (54), and the output end of the dynamometer (51) is fixedly connected to a chuck (55).

3. The multi-station diesel engine test system according to claim 2, characterized in that, The support assembly includes two sets of cylinders (23), a support plate (27), a top plate (28), and a second set of cylinders (29). A lifting frame (24) is provided between the two sets of cylinders (23). The tops of the two sets of cylinders (23) are fixedly connected to the lifting frame (24). The top of the lifting frame (24) is fixedly connected to the support plate (27). The support plate (27) has four sets of limiting holes.

4. The multi-station diesel engine test system according to claim 3, characterized in that, The lifting frame (24) is fixedly connected to four sets of limiting parts on its side. Each limiting part includes two sets of limiting wheels (25) and limiting rods (26). The two sets of limiting wheels (25) are vertically fixed to the side of the lifting frame (24), and the limiting rods (26) are fixed to the inner wall of the frame (21). The limiting wheels (25) are in contact with the limiting rods (26), and the outer ring of the limiting wheels (25) is provided with a groove that matches the diameter of the limiting rods (26).

5. The multi-station diesel engine test system according to claim 4, characterized in that, The top plate (28) is fixed to the top of the frame (21), the second cylinder (29) is fixed to the top of the top plate (28), the output end of the second cylinder (29) passes through the top plate (28) and is fixedly connected to the lifting plate (212), the top of the lifting plate (212) is fixedly connected to two sets of guide rods (210), the first guide rod (210) passes through the top plate (28) and is slidably connected to the top plate (28), the four corners of the top plate (28) are fixedly connected to the second guide rod (211), the second guide rod (211) passes through the lifting plate (212) and is slidably connected to the lifting plate (212), the four sets of the second guide rods (211) correspond to the positions of the four sets of limiting holes on the support plate (27), and the lower ends of the four sets of the second guide rods (211) are slidably connected to the bottom plate (213).

6. The multi-station diesel engine test system according to claim 5, characterized in that, The top of the base plate (213) is fixedly connected to support seat one (56) and support seat two (57), and the bottom of the lifting plate (212) is fixedly connected to support seat three (58). Support seat one (56) is located on the side of the single-axis moving seat one (214) away from the dynamometer (51), and support seat two (57) is located on the side of the single-axis moving seat one (214) away from the conveyor belt (1). Two sets of cylinders (59) are fixed to the side of support base one (56) near the single-axis moving base one (214), part of cylinders (59) is fixed to the side of support base two (57) near the single-axis moving base one (214), and the remaining part of cylinders (59) is fixed to the bottom of support base three (58). The two sets of cylinders (59) on support base one (56) are respectively fixedly connected to a vibration sensor (52) and a noise sensor (53). The output end of cylinders (59) on support base two (57) is fixedly connected to the vibration sensor (52), and the output end of cylinders (59) on support base three (58) is fixedly connected to the noise sensor (53).

7. The multi-station diesel engine test system according to claim 6, characterized in that, The top of the base plate (213) is fixedly connected to a single-axis moving seat (214), and a fixed seat (215) is adsorbed above the single-axis moving seat (214) using a negative pressure adsorption device. The top of the fixed seat (215) is provided with a slot. A temperature sensor (510) is also fixedly connected above the side of the second support base (57) facing the first single-axis moving base (214). A camera (511) is fixedly connected to the side of the frame (21) near the dynamometer (51).

8. The multi-station diesel engine test system according to claim 7, characterized in that, The structure and connection relationship of workstation 2 (3) are the same as those of workstation 1 (2); The second testing mechanism (6) is located in the second workstation (3). The second testing mechanism (6) has the same structure and connection relationship as the first testing mechanism (5).

9. The multi-station diesel engine test system according to claim 8, characterized in that, The number of vibration sensors (52) and noise sensors (53) is at least the same as the sum of the number of cylinders and the number of cylinders at both ends of the diesel engine (7) to be tested, and the vibration sensors (52) and noise sensors (53) are provided at least one-to-one.

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