A diesel engine starting load loading device

Abstract

The utility model relates to a diesel engine starting load loading device relates to the field of diesel engine, it includes six direction adjustable base, six direction adjustable base is equipped with threaded propulsion adjusting device, threaded propulsion adjusting device is equipped with friction ware fixed piece, and the friction ware moving piece is connected with the diesel engine flywheel through the universal shaft, and the torque check device is linked with the friction ware moving piece, can adjust the friction ware fixed piece and friction ware moving piece pressure compactness through threaded propulsion adjusting device, realizes diesel engine starting load loading. The utility model is favorable to overcome the defect of traditional hydraulic dynamometer loading mode in loading capacity, work efficiency, torque stability and environmental adaptability etc.

Description

Technical Field

[0001] This utility model relates to the field of diesel engines, and in particular to a diesel engine starting load loading device. Background Technology

[0002] With the continuous development of diesel engine technology, the requirements for its performance testing are becoming increasingly stringent. Whether in the research and development, production, or maintenance stages, it is necessary to simulate various load conditions to accurately test key indicators such as the diesel engine's starting performance, output power, and fuel economy. Starting load application devices can provide accurate and controllable loads, which are crucial for evaluating the diesel engine's ability to operate under different conditions and provide a scientific basis for diesel engine design optimization and performance improvement.

[0003] Currently, the industry commonly uses the pre-loading method of hydraulic dynamometers for relevant tests, and the specific operation procedure is as follows:

[0004] 1. Send the diesel engine into the hydraulic dynamometer test chamber and install it precisely to ensure that the alignment error between the diesel engine and the hydraulic dynamometer is controlled within ±0.5mm.

[0005] 2. Connect the power supply and control switch of the diesel engine starter motor to prepare for the subsequent starting operation.

[0006] 3. Open the water gate regulating valve of the hydraulic dynamometer in advance to make the applied torque close to the target torque, thus creating the initial conditions for starting the test.

[0007] 4. Start the diesel engine, record the load torque data during the actual start-up process, compare it with the target torque, and calculate the difference.

[0008] 5. After stopping the machine, adjust the water gate opening according to the difference to get closer to the target torque.

[0009] 5. Repeat steps 4 and 5 until the target torque is reached to complete the entire test process.

[0010] However, this traditional method of preloading hydraulic dynamometers has many limitations and drawbacks: 1. The hydraulic dynamometer has limited loading capacity and is mainly suitable for testing small diesel engines. It is inadequate for testing large diesel engines.

[0011] 2. The installation of the diesel engine on the test bench requires a lot of manpower, which increases the physical burden on employees and reduces work efficiency.

[0012] 3. Adjusting the water gate opening requires repeated adjustments to approach the target value, which not only leads to low work efficiency but also results in large errors throughout the process, and there is a lack of effective calibration methods.

[0013] 4. Due to the influence of changes in water supply pressure and water flow, torque fluctuations may occur during the load loading process, which may affect the stability of the test results. Utility Model Content

[0014] The present invention aims to provide a high-efficiency, accurate and adaptable diesel engine starting load loading device to overcome the shortcomings of traditional hydraulic dynamometer loading methods in terms of loading capacity, working efficiency, torque stability and environmental adaptability.

[0015] To achieve the above objectives, the present invention provides a diesel engine starting load loading device, comprising a six-way adjustable base, a threaded push adjustment device on the six-way adjustable base, a friction fixed plate on the threaded push adjustment device, a friction moving plate connected to the diesel engine flywheel via a universal joint, and a torque verification device connected to the friction moving plate. The clamping force between the friction fixed plate and the friction moving plate can be adjusted through the threaded push adjustment device to achieve diesel engine starting load loading.

[0016] Preferably, it includes a height adjustment device, which is responsible for vertical adjustment and together with the bracket guide rail, forms an all-round adjustment system in three-dimensional space to ensure that the fixed friction plate can accurately align with the moving friction plate and meet the installation accuracy requirements.

[0017] Preferably, the six-way adjustable base is mounted on the bracket guide rail of the base plate to provide stable foundation support for the friction plate and to achieve flexible adjustment of its spatial position.

[0018] Preferably, the bracket guide rail is used for left-right and front-back adjustment.

[0019] Preferably, the threaded advance adjustment device is connected to a spring and is used to precisely control the clamping force between the fixed friction plate and the moving friction plate, thereby adjusting the applied load.

[0020] Preferably, the universal joint can effectively transmit torque and allows for a certain degree of angular deviation, ensuring smooth and reliable power transmission between the diesel engine flywheel and the friction plate.

[0021] Preferably, the torque verification device adopts a structure of a boom and weights. By loading a preset weight on the boom, a standard gravitational torque is generated, providing a precise reference for adjusting the clamping force of the fixed and moving plates of the friction device.

[0022] Preferably, the side of the moving plate of the friction device is connected to the torque verification device.

[0023] Preferably, the XYZ three-axis adjustment of the friction device can be achieved by moving the six-way adjustable base, so that the fixed friction plate can be accurately aligned with the moving friction plate.

[0024] In summary, this utility model has the following beneficial technical effects: This invention utilizes a mechanical-gravity composite calibration method to construct a highly reliable load loading system. Its modular design allows for rapid adaptation to the testing requirements of different diesel engine models. The core innovation lies in replacing traditional hydraulic loading with mechanical friction loading, significantly improving control accuracy under low-speed, high-torque conditions. This device is adaptable to various testing environments, including high and low temperatures, overcoming the shortcomings of hydraulic dynamometers such as low loading torque, large errors, and poor environmental applicability. It can operate stably in various complex environments, ensuring the accuracy and reliability of test results.

[0025] This device reduces the number of operators to a single person, resulting in high efficiency. Through optimized structural design and operating procedures, it enables rapid loading and precise adjustment of the diesel engine's starting load by a single operator, significantly reducing labor costs and operational complexity, improving work efficiency, and providing a more convenient and efficient solution for diesel engine testing and research and development.

[0026] This device boasts high load-bearing accuracy and is unaffected by external environmental conditions. Thanks to its precise mechanical structure and calibration methods, it enables accurate control and adjustment of the load, unaffected by external environmental factors such as temperature and humidity. This ensures the consistency and stability of the load under different environmental conditions, providing strong technical support for diesel engine performance evaluation and contributing to improving the overall R&D level and market competitiveness of diesel engines. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a diesel engine starting load loading device according to the present invention; Figure 2 This is a side view of the structure of a diesel engine starting load loading device according to the present invention; Figure 3 This is a top view schematic diagram of a diesel engine starting load loading device according to the present invention; Figure 4 This is a side view of the diesel engine starting load loading device of this utility model during operation; Figure 5 This is a top view of the diesel engine starting load loading device of this utility model during operation.

[0028] Reference numerals in the attached diagram: 1. Six-way adjustable base; 2. Threaded push adjustment device; 3. Friction unit stationary plate; 4. Torque verification device; 5. Friction unit moving plate; 6. Universal joint; 7. Diesel engine flywheel; 8. Spring displacement adjustment screw; 9. Spring; 10. Engine connecting flange; 11. Connecting transition block; 12. Height adjustment; 13. Stepper motor guide rail; 14. Bracket guide rail; 15. Height adjustment device; 16. Original position of friction unit stationary plate; 17. Original position of friction unit moving plate; 18. Working positions of friction unit stationary and moving plates. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] This utility model discloses a diesel engine starting load loading device, which has an ingenious structural design and all components cooperate with each other to achieve efficient and safe diesel engine starting load loading function. The friction plate 3 is installed via a six-way adjustable base 1 and a threaded push adjustment device 2. The six-way adjustable base 1 provides a stable foundation support for the friction plate 3 and can flexibly adjust its spatial position to meet the installation requirements under different working conditions. It is fixed to the base plate bracket guide rail 14 with screws to ensure the stability of the overall structure.

[0031] After the threaded push adjustment device 2 is connected to the friction spring 9, it is also fixed to the six-way adjustable base 1 by screws. Its function is to precisely control the clamping force between the fixed friction plate 3 and the moving friction plate 5, thereby adjusting the load size.

[0032] The moving friction plate 5 is connected to the diesel engine flywheel 7 via a universal joint 6. The universal joint 6 can effectively transmit torque and allows for a certain degree of angular deviation, ensuring smooth and reliable power transmission between the diesel engine flywheel 7 and the moving friction plate 5. The front of the moving friction plate 5 is connected to the universal joint 6 by screws, and the universal joint 6 is then connected to the diesel engine flywheel 7 by screws, forming a complete and stable transmission chain. At the same time, the side of the moving friction plate 5 is connected to the torque calibration device 4 by screws. The torque calibration device 4 adopts a structure of a boom and weights. By loading a preset weight on the boom, a standard gravitational torque is generated, providing an accurate reference for adjusting the clamping force between the fixed friction plate 3 and the moving friction plate, thereby ensuring that the loaded load meets the actual test requirements.

[0033] The bracket guide rail 14 is used for left-right and front-back adjustment, providing flexible spatial adjustment capabilities for the entire device to adapt to the installation and commissioning needs of diesel engines and other related components of different sizes and specifications. The height adjustment device 15 is responsible for vertical adjustment, forming a three-dimensional all-round adjustment system together with the bracket guide rail 14. This ensures that the friction plate 3 can accurately align with the friction plate 5 and meet the installation accuracy requirements, namely, the concentricity error between the diesel engine flywheel 7 and the friction plate is controlled within ±0.5mm, and the angular compensation is within ±5°, thereby ensuring the operational stability of the entire loading device and the accuracy of the test results.

[0034] During the installation of the device, the fixed friction plate 3 is first fixed to the six-way adjustable base 1 with screws. Then, the threaded push adjustment device 2 is connected to the friction spring 9 and fixed to the six-way adjustable base 1 with screws. Next, the six-way adjustable base 1 is fixed to the base plate bracket guide rail 14 with screws, forming a stable installation foundation. At the same time, the front of the moving friction plate 5 is connected to the universal joint 6 with screws, and the universal joint 6 is then connected to the diesel engine flywheel 7 with screws, realizing the key connection for power transmission. In addition, the side of the moving friction plate 5 is connected to the torque calibration device 4 with screws, completing the installation of the torque calibration device 4 and preparing for subsequent calibration work.

[0035] The calibration process of the device is a crucial step in ensuring loading accuracy, and its specific steps are as follows: 1. Load a preset weight of weight onto the boom of the torque calibration device 4 to generate a standard gravitational torque, providing a benchmark for subsequent friction torque adjustment; 2. The pre-tightening thread of the threaded advance adjustment device 2 is used to achieve initial contact between the moving and stationary plates of the friction unit, ensuring that a preliminary contact state is established between the two, thus creating conditions for precise adjustment; 3. The six-way adjustable base 1 is moved to achieve the spatial positioning of the friction device, that is, the XYZ three-axis adjustment, so that the fixed plate 3 of the friction device can be accurately aligned with the moving plate 5 of the friction device, which meets the installation accuracy requirements and reduces the measurement error and unstable operation caused by position deviation. 4. Operate the fine-tuning thread of the threaded advance adjustment device 2 to make the frictional torque exactly equal to the weight torque, satisfying the torque balance relationship expressed by the formula M_f=W×L, thereby completing the precise calibration of the device, ensuring that the loaded load is accurate, and providing a reliable measurement basis for subsequent tests.

[0036] The experimental usage steps for the device are as follows: 1. Remove the torque verification device 4 to avoid it interfering with the actual test process; 2. Maintain the adjusted contact state of the friction plates to ensure that there is an appropriate clamping force between the fixed friction plate 3 and the moving friction plate 5, thereby achieving a stable load loading effect; 3. Control the diesel engine to start at idle speed and fuel level. During the diesel engine start-up process, the flywheel torque is transmitted to the friction system through the universal joint 6, causing the friction moving plate 5 to rotate accordingly, thereby simulating the load conditions under actual working conditions and conducting a comprehensive test on the starting performance of the diesel engine. 4. Throughout the test, the stability and torque balance of the friction system are monitored in real time. Relevant operating data are collected through various sensors and monitoring equipment to analyze the dynamic response and stability of the friction system under load, as well as the transmission and balance of torque. 5. The conclusions on the starting state of the diesel engine after applying a preset load during the starting process are obtained, providing important data support and technical basis for diesel engine design optimization, performance evaluation and fault diagnosis.

[0037] The innovation of this device lies in its optimized combination of structural design and operation method. It enables single-person operation of diesel engine starting load adjustment, significantly improving work efficiency and reducing labor costs and operational complexity. Simultaneously, the tight connections between components, flexible adjustments, and stable operation effectively guarantee work quality, ensuring accurate and reliable test results, and providing strong technical support for diesel engine research and development and production. Furthermore, the device has given full consideration to personnel safety during operation. Through reasonable layout and protective design, it reduces the risks that operators may face during testing, ensuring the safety and reliability of the entire operation process, meeting the dual requirements of safety and efficiency in modern industrial production.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A diesel engine starting load loading device, characterized in that, The system includes a six-way adjustable base (1), on which a threaded push adjustment device (2) is provided. The threaded push adjustment device (2) is provided with a friction plate (3), and the friction plate (5) is connected to the diesel engine flywheel (7) via a universal joint (6). A torque verification device (4) is connected to the friction plate (5). The clamping force between the friction plate (3) and the friction plate (5) can be adjusted by the threaded push adjustment device (2) to achieve diesel engine starting load loading.

2. The diesel engine starting load loading device according to claim 1, characterized in that, Includes a height adjustment device (15), which is responsible for adjusting in the up and down direction. Together with the bracket guide rail (14), it forms an all-round adjustment system in three-dimensional space to ensure that the fixed friction plate (3) can accurately dock with the moving friction plate (5) and meet the installation accuracy requirements.

3. A diesel engine starting load loading device according to claim 2, characterized in that, The six-way adjustable base (1) is mounted on the bracket guide rail (14) on the base plate, which provides a stable foundation support for the friction plate (3) and enables flexible adjustment of its spatial position.

4. A diesel engine starting load loading device according to claim 3, characterized in that, The bracket guide rail (14) is used for left-right and front-back adjustment.

5. A diesel engine starting load loading device according to claim 4, characterized in that, The threaded push adjustment device (2) is connected to the spring (9) and is used to precisely control the clamping force between the fixed friction plate (3) and the moving friction plate (5), thereby adjusting the load size.

6. A diesel engine starting load loading device according to claim 5, characterized in that, The universal joint (6) can effectively transmit torque and allow a certain degree of angular deviation, ensuring smooth and reliable power transmission between the diesel engine flywheel (7) and the friction plate (5).

7. A diesel engine starting load loading device according to claim 6, characterized in that, The torque verification device (4) adopts a structure of boom and weight. By loading a weight of preset weight on the boom, a standard gravitational torque is generated, which provides an accurate reference for adjusting the clamping force of the fixed plate (3) and the moving plate of the friction device.

8. A diesel engine starting load loading device according to claim 7, characterized in that, The side of the friction plate (5) is connected to the torque verification device (4).

9. A diesel engine starting load loading device according to claim 8, characterized in that, The friction device can be adjusted in three axes (XYZ) by moving the six-way adjustable base (1), so that the fixed friction plate (3) can be accurately aligned with the moving friction plate (5).

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