Diesel engine piston cooling nozzle targeting verification tool

Abstract

The utility model discloses a diesel engine piston cooling nozzle targeting verification tool which comprises a bottom plate and a boss arranged on the inner side face of the bottom plate, a fixing hole is formed in the bottom plate, the boss is embedded into a diesel engine, the inner side face of the boss faces a piston cooling nozzle, and an oil beam target positioning mark is arranged on the inner side face of the boss. In the detection process, the bottom plate is installed on the diesel engine, the piston cooling nozzle faces the inner side of the boss, the nozzle sprays cooling oil, the cooling oil is sprayed to the inner side face of the boss, then the coincidence degree of a drop point of the cooling oil and an oil beam target positioning mark is judged, the higher the coincidence degree is, the higher the qualified grade is, and piston cooling nozzle targeting verification is completed. Through the mode, the piston does not need to be wasted, the detection effect can be directly observed, the detection process is simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine testing, and in particular to a tooling for testing diesel engine piston cooling nozzles by hitting a target. Background Technology

[0002] With evolving user demands, the development trend of marine diesel engines is gradually shifting towards high speed, low carbon emissions, high power, and turbocharging. The harsh environment of high load and high explosion pressure places higher demands on the design of diesel engine components. As a key component of the diesel engine, the piston bears enormous explosion pressure and thermal loads. If the piston temperature exceeds the material's withstand capability, the piston material's strength will be significantly reduced, leading to permanent deformation, fracture, or even localized ablation during long-term operation. To reduce the piston temperature, forced cooling nozzles are typically used for the piston.

[0003] To ensure effective cooling, after the piston cooling nozzles are installed, it's necessary to determine whether the cooling oil can enter the piston's cooling oil passages. The accuracy of the nozzle's aiming position within the piston's cooling oil chamber significantly impacts piston cooling. Current technologies typically involve simulating normal operation after piston installation, running it for a period, and then checking the piston's condition to assess cooling effectiveness and determine the accuracy of the nozzle's aiming position. This method is inefficient and results in wasted components.

[0004] Therefore, how to provide a stable and efficient tooling for calibrating diesel engine piston cooling nozzles is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a tooling for testing diesel engine piston cooling nozzles by targeting. During the testing process, a base plate is installed on the diesel engine, so that the piston cooling nozzles face the inside of the boss. The cooling oil sprayed from the nozzles is judged by the degree of overlap between the landing point of the cooling oil on the boss and the oil jet target positioning mark, thereby determining whether it is qualified and improving the testing efficiency.

[0006] To solve the above-mentioned technical problems, this utility model provides a diesel engine piston cooling nozzle target calibration fixture, including a base plate and a boss disposed on the inner side of the base plate. The base plate is provided with fixing holes, the boss is embedded inside the diesel engine, the inner side of the boss faces the piston cooling nozzle, and the inner side of the boss is provided with an oil jet target positioning mark.

[0007] Preferably, the boss is a transparent plastic platform, and an observation window is provided on the outer side of the base plate corresponding to the position of the boss.

[0008] Preferably, the boss and the base plate are integrally formed and are both made of transparent plastic.

[0009] Preferably, the boss is a cylindrical platform, and the boss is located at the center of the inner side of the base plate.

[0010] Preferably, the base plate has opposing straight edges on its horizontal sides and opposing curved edges on its vertical sides.

[0011] Preferably, it includes four fixing holes, which are respectively disposed at the four corners of the base plate.

[0012] Preferably, the oil jet target positioning mark includes multiple concentric circles with progressively larger diameters.

[0013] Preferably, the concentric circles are spaced apart by grooves or by different colors.

[0014] Preferably, it includes multiple oil jet target positioning marks corresponding to different piston cooling nozzles.

[0015] Preferably, a vision camera facing the outer side of the boss is mounted on the outer side of the base plate.

[0016] This utility model provides a diesel engine piston cooling nozzle target calibration fixture, including a base plate and a boss set on the inner side of the base plate. The base plate is provided with fixing holes, the boss is embedded in the diesel engine, the inner side of the boss faces the piston cooling nozzle, and the inner side of the boss is provided with oil jet target positioning marks.

[0017] During the testing process, the base plate is installed on the diesel engine, with the piston cooling nozzle facing the inside of the boss. The cooling oil sprayed from the nozzle is sprayed onto the inner side of the boss. Then, the degree of overlap between the landing point of the cooling oil and the oil jet target positioning mark is judged. The higher the degree of overlap, the higher the pass level. The piston cooling nozzle target calibration is completed. The above method does not require the waste of pistons and allows direct observation of the test results, simplifying the inspection process and improving the testing efficiency. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of a specific embodiment of the diesel engine piston cooling nozzle target calibration tooling provided by this utility model;

[0019] Figure 2 This is a side view schematic diagram of a specific embodiment of the diesel engine piston cooling nozzle target calibration tool provided by this utility model.

[0020] Among them, the base plate 1, the boss 2, the fixing hole 3, and the oil jet target positioning mark 4. Detailed Implementation

[0021] The core of this utility model is to provide a diesel engine piston cooling nozzle target calibration fixture. During the testing process, the base plate is installed on the diesel engine, so that the piston cooling nozzle faces the inside of the boss. The cooling oil sprayed from the nozzle is judged by the degree of overlap between the landing point of the cooling oil on the boss and the oil jet target positioning mark, thereby determining whether it is qualified and improving the testing efficiency.

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Please refer to Figure 1 and Figure 2 , Figure 1 This is a front view schematic diagram of a specific embodiment of the diesel engine piston cooling nozzle target calibration tooling provided by this utility model; Figure 2 This is a side view schematic diagram of a specific embodiment of the diesel engine piston cooling nozzle target calibration tool provided by this utility model.

[0024] This utility model provides a calibration fixture for a diesel engine piston cooling nozzle, including a base plate 1 and a boss 2 disposed on the inner side of the base plate 1. The base plate 1 has fixing holes 3. During the testing process, the base plate 1 is installed on the diesel engine to be tested, and the fixing holes 3 securely connect the base plate 1 to the diesel engine. The side of each component closest to the diesel engine is the inner side, and the side furthest from the diesel engine is the outer side. The boss 2 is embedded inside the diesel engine, with its inner side facing the piston cooling nozzle. An oil jet target positioning mark 4 is provided on the inner side of the boss 2, corresponding to the position of the piston oil passage.

[0025] During the testing process, the base plate 1 is installed on the diesel engine, with the piston cooling nozzle facing the inside of the boss 1. Cooling oil, or simulated liquid, is sprayed from the nozzle onto the inner side of the boss 1. The degree of overlap between the landing point of the cooling oil and the oil jet target positioning mark 4 is then determined. The higher the degree of overlap, the higher the pass rate. This completes the piston cooling nozzle target calibration. The above method does not require the waste of pistons and allows for direct observation of the testing effect, simplifying the inspection process and improving testing efficiency.

[0026] In the diesel engine piston cooling nozzle calibration fixture provided in this specific embodiment of the invention, the boss 2 is a transparent plastic platform, and an observation window is provided on the outer side of the base plate 1 corresponding to the position of the boss 2. That is, during the testing process, it is not necessary to disassemble the base plate 1, and the landing point of the cooling oil can be directly observed from the outer side, further improving the testing efficiency.

[0027] In Embodiment 1, the boss 2 and the base plate 1 are integrally formed and are both made of transparent plastic. In Embodiment 2, the base plate 1 can be a metal plate with a through hole in the middle. The thickness of the boss 2 is greater than the rear end of the metal plate, and the boss 2 is embedded in the through hole in the middle.

[0028] Specifically, the boss 2 is a cylindrical platform, located at the center of the inner side of the base plate 1. The base plate 1 has opposing straight edges on its horizontal sides and opposing curved edges on its vertical sides. The shapes of the components can also be adjusted as needed, such as the base plate being a rectangular plate and the boss 2 being a cuboid shape, all of which are within the protection scope of this utility model.

[0029] Four fixing holes 3 can be provided, located at the four corners of the base plate 1. The fixing holes 3 are through holes, through which bolts are passed to connect the diesel engine.

[0030] In the diesel engine piston cooling nozzle target calibration fixture provided in this specific embodiment of the utility model, the oil jet target positioning mark 4 includes multiple concentric circles with progressively larger diameters. To clearly distinguish between the different concentric circles, they are spaced apart by grooves or different colors. This is used to differentiate the quality grade of the piston cooling nozzle and is applicable to different grades of diesel engine assembly. Specifically, the closer the landing point is to the center of the concentric circle, the higher the quality grade; the closer the landing point is to the outer perimeter, the lower the quality grade. If the nozzle cannot land within a concentric circle, it indicates that the cooling oil cannot smoothly enter the oil passage, signifying a failure.

[0031] Preferably, multiple oil jet target positioning marks 4 are provided, each corresponding to a different piston cooling nozzle. The same tooling can be used for testing various types of diesel engines, thus improving applicability.

[0032] Based on the diesel engine piston cooling nozzle target calibration fixture provided in the above specific embodiments, a vision camera facing the outer side of the boss 2 is installed on the outer side of the base plate 1. By capturing the impact point position with the vision camera, the pass / fail status is directly determined, improving the level of automation.

[0033] The above provides a detailed description of the diesel engine piston cooling nozzle calibration fixture provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A tooling for testing and calibrating diesel engine piston cooling nozzles, characterized in that, It includes a base plate (1) and a boss (2) provided on the inner side of the base plate (1). The base plate (1) is provided with a fixing hole (3). The boss (2) is embedded inside the diesel engine. The inner side of the boss (2) faces the piston cooling nozzle. The inner side of the boss (2) is provided with an oil jet target positioning mark (4).

2. The diesel engine piston cooling nozzle target calibration fixture according to claim 1, characterized in that, The protrusion (2) is a transparent plastic platform, and an observation window is provided on the outer side of the base plate (1) corresponding to the position of the protrusion (2).

3. The diesel engine piston cooling nozzle target calibration fixture according to claim 2, characterized in that, The boss (2) and the base plate (1) are integrally formed and are both made of transparent plastic.

4. The diesel engine piston cooling nozzle calibration fixture according to claim 2, characterized in that, The boss (2) is a cylindrical platform, and the boss (2) is located at the center of the inner side of the base plate (1).

5. The diesel engine piston cooling nozzle target calibration fixture according to claim 4, characterized in that, The base plate (1) has opposite straight edges on its horizontal sides and opposite curved edges on its vertical sides.

6. The diesel engine piston cooling nozzle target calibration fixture according to claim 5, characterized in that, It includes four fixing holes (3), which are respectively set at the four corners of the base plate (1).

7. The diesel engine piston cooling nozzle target calibration fixture according to claim 2, characterized in that, The oil jet target positioning mark (4) includes multiple concentric circles with progressively larger diameters.

8. The diesel engine piston cooling nozzle target calibration fixture according to claim 7, characterized in that, The concentric circles are spaced apart by grooves or by different colors.

9. The diesel engine piston cooling nozzle target calibration fixture according to claim 8, characterized in that, This includes multiple oil jet target positioning marks (4) corresponding to different piston cooling nozzles.

10. The diesel engine piston cooling nozzle target calibration fixture according to any one of claims 2 to 9, characterized in that, A vision camera facing the outer side of the boss (2) is mounted on the outer side of the base plate (1).

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