A filter mechanism for diesel engine

Abstract

The utility model belongs to the internal combustion locomotive fuel filter technical field, concretely relates to a kind of internal combustion locomotive fuel filter mechanism, comprising: be located in the shell for load protection shell, the shell cover of being sleeved in shell opening, the oil inlet of being arranged in the annular array distribution of shell cover surface, connect in the outer sealing ring for fixed shell cover in shell end part, filter cartridge being located in shell interior, filter paper core being connected in the outer surface of filter cartridge, check valve being connected in the inner wall of shell cover and with filter cartridge sealed abutment, alloy spring being connected in the inner wall of shell and with filter cartridge abutment and safety valve assembly being connected in the inner wall of filter cartridge and with shell inner wall be connected.The utility model, when cover is extruded, can compress spring strip, when cover moves to the outside of second sealing ring, fuel can enter the inside of filter cartridge through the filter hole of cover surface at this time, to accelerate the flow of fuel, to filter large particle impurities when oil pressure exceeds threshold value and leaks.

Description

Technical Field

[0001] This utility model belongs to the field of fuel filtration technology for internal combustion locomotives, and specifically relates to a fuel filtration mechanism for internal combustion locomotives. Background Technology

[0002] The fuel filtration system of an internal combustion engine locomotive is a crucial system for ensuring fuel cleanliness and protecting core engine components. It mainly consists of a two-stage filtration system comprised of a coarse fuel filter and a fine fuel filter. The fuel filter is one type of fuel filtration system in an internal combustion engine locomotive.

[0003] Fuel filters are key components in the fuel systems of internal combustion engines (such as cars, trucks, ships, and construction machinery). Their core function is to filter impurities and moisture from the fuel, ensuring the cleanliness of the fuel entering the engine, thereby protecting the engine's precision components, improving combustion efficiency, and extending its service life.

[0004] In actual operation, existing internal combustion engine fuel filtration systems require pressure regulation via a built-in safety valve to ensure system safety when the internal fuel pressure abnormally rises above the design threshold due to various reasons. However, during this pressure regulation process, fuel bypasses the filter media and flows directly through the safety valve's pressure relief channel, resulting in the fuel failing to filter any impurities during this period. Utility Model Content

[0005] The purpose of this utility model is to provide a fuel filtration mechanism for internal combustion locomotives, which aims to solve the problem in the prior art where, when the internal fuel pressure rises abnormally to exceed the design threshold, the built-in safety valve is needed to regulate the pressure to ensure system safety. During this pressure regulation process, the fuel bypasses the filter medium and flows directly through the pressure relief channel of the safety valve, resulting in the fuel being unable to achieve any impurity filtration effect during this period.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fuel filtration mechanism for internal combustion locomotives, comprising: an outer shell for bearing and protection, an outer shell cover fitted over the opening of the outer shell, oil inlets arranged in a ring array on the surface of the outer shell cover, an outer sealing ring connected to the end of the outer shell cover for fixing the outer shell cover, a filter cartridge disposed inside the outer shell, a filter paper core connected to the outer surface of the filter cartridge, a check valve connected to the inner wall of the outer shell cover and sealingly abutting against the filter cartridge, an alloy spring connected to the inner wall of the outer shell and abutting against the filter cartridge, and a safety valve assembly connected to the inner wall of the filter cartridge and connected to the inner wall of the outer shell; the inner wall of the outer shell is connected to a cleaning component for cleaning the inner wall.

[0007] The safety valve assembly includes a plugging part connected to the inner wall of the filter cartridge, a guide part connected between the plugging part and the filter cartridge, and a sealing part connected between the plugging part and the outer shell.

[0008] As a preferred embodiment of the fuel filtration mechanism for internal combustion locomotives according to this utility model, the sealing part includes a spring strip connected to the inner wall of the filter cartridge, a cap connected to the end of the spring strip and inserted into the opening of the filter cartridge, and a first sealing ring connected to the side surface of the cap and abutting against the inner wall of the filter cartridge.

[0009] As a preferred embodiment of the fuel filtration mechanism for internal combustion locomotives according to this utility model, the end surface of the cover is further provided with filter holes.

[0010] As a preferred embodiment of the fuel filtration mechanism for internal combustion locomotives according to this utility model, the guide portion includes a guide hole formed on the surface of the cover and a guide rod that passes through the guide hole and is connected to the inner wall of the filter cartridge.

[0011] As a preferred embodiment of the fuel filtration mechanism for internal combustion locomotives according to this utility model, the sealing part includes a cylinder connected to the inner wall of the outer shell and a second sealing ring connected to the inner wall of the cylinder and abutting against the cover.

[0012] As a preferred embodiment of the fuel filtration mechanism for internal combustion locomotives according to this utility model, the cleaning component includes an annular plate disposed on the inner wall of the outer shell, two sets of scrapers connected to the side wall of the annular plate and arranged in a spiral shape, a limiting part disposed between the two sets of scrapers and the outer shell, and a connecting plate connected to the other side of the annular plate and arranged in a ring array.

[0013] As a preferred embodiment of the fuel filtration mechanism for internal combustion locomotives according to this utility model, the limiting part includes limiting grooves respectively opened on the surfaces of two sets of scrapers and a limiting ring connected to the inner wall of the outer shell and adapted to the size of the limiting grooves.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the cap can compress the spring strip when it is squeezed. When the cap moves to the outside of the second sealing ring, fuel can enter the interior of the filter cartridge through the filter holes on the surface of the cap, thereby accelerating the flow of fuel and filtering out large particulate impurities when the oil pressure exceeds the threshold and oil is released.

[0016] In this invention, fuel is injected into the interior of the outer casing through the inlet and impacts the connecting plate. When the connecting plate is impacted, it drives the annular plate to rotate. When the annular plate rotates, it drives the scraper to rotate. When the scraper rotates, it can scrape off the impurities attached to the inner wall of the outer casing, thereby cleaning the inner wall of the outer casing. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the present invention.

[0020] Figure 3 This is an exploded cross-sectional view of the safety valve assembly of this utility model;

[0021] Figure 4 This is a cross-sectional view of the connection structure of the cleaning component of this utility model;

[0022] Figure 5 This is a schematic diagram of the cleaning component structure of this utility model.

[0023] In the diagram: 11. Outer shell; 12. Outer shell cover; 13. Outer sealing ring; 14. Filter cartridge; 15. Filter paper core; 16. Check valve; 17. Alloy spring; 18. Oil inlet; 2. Safety valve assembly; 21. Sealing part; 211. Spring strip; 212. Cover; 213. First sealing ring; 214. Filter hole; 22. Guide part; 221. Guide hole; 222. Guide rod; 23. Sealing part; 231. Cylinder; 232. Second sealing ring; 3. Cleaning assembly; 31. Annular plate; 32. Scraper; 33. Limiting part; 331. Limiting ring; 332. Limiting groove; 34. Connecting plate. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-5 The present invention provides the following technical solution: a fuel filtration mechanism for internal combustion locomotives, comprising: an outer shell 11 for bearing and protection, an outer shell cover 12 fitted over the opening of the outer shell 11, oil inlets 18 arranged in a ring array on the surface of the outer shell cover 12, an outer sealing ring 13 connected to the end of the outer shell 11 for fixing the outer shell cover 12, a filter cartridge 14 disposed inside the outer shell 11, a filter paper core 15 connected to the outer surface of the filter cartridge 14, a check valve 16 connected to the inner wall of the outer shell cover 12 and sealingly abutting against the filter cartridge 14, an alloy spring 17 connected to the inner wall of the outer shell 11 and abutting against the filter cartridge 14, and a safety valve assembly 2 connected to the inner wall of the filter cartridge 14 and connected to the inner wall of the outer shell 11, and a cleaning assembly 3 for cleaning the inner wall connected to the inner wall of the outer shell 11;

[0026] The safety valve assembly 2 includes a plugging part 21 connected to the inner wall of the filter cartridge 14, a guide part 22 connected between the plugging part 21 and the filter cartridge 14, and a sealing part 23 connected between the plugging part 21 and the outer casing 11.

[0027] Fuel enters the interior of filter cartridge 14 through inlet 18, then enters the inner wall through filter paper core 15 and through the round hole of filter cartridge 14, and then the filtered fuel is discharged through the outlet in the middle of outer cover 12.

[0028] Preferably, the sealing part 21 includes a spring strip 211 connected to the inner wall of the filter cartridge 14, a cap 212 connected to the end of the spring strip 211 and inserted into the opening of the filter cartridge 14, and a first sealing ring 213 connected to the side surface of the cap 212 and abutting against the inner wall of the filter cartridge 14.

[0029] In practical use, when the oil pressure inside the filter cartridge 14 exceeds the threshold, the cover 212 can be squeezed, and when the cover 212 is squeezed, the spring strip 211 can be compressed.

[0030] Preferably, the end surface of the cap 212 is also provided with filter holes 214.

[0031] In practical use, filter holes 214 are provided on the surface of the cover 212, so that large particulate impurities can be filtered when the oil pressure exceeds the threshold and oil is released.

[0032] Preferably, the guide portion 22 includes a guide hole 221 formed on the surface of the cover 212 and a guide rod 222 that passes through the guide hole 221 and is connected to the inner wall of the filter cartridge 14.

[0033] In practical use, when the cover 212 is subjected to a force, it can drive the guide hole 221 to slide on the surface of the guide rod 222, which can restrict the movement direction of the cover 212.

[0034] Preferably, the sealing part 23 includes a cylinder 231 connected to the inner wall of the outer casing 11 and a second sealing ring 232 connected to the inner wall of the cylinder 231 and abutting against the cap 212.

[0035] In practical use, the second sealing ring 232 can be used to seal with the cover 212.

[0036] Preferably, the cleaning component 3 includes an annular plate 31 disposed on the inner wall of the housing 11, two sets of scrapers 32 connected to the side wall of the annular plate 31 and arranged in a spiral shape, a limiting part 33 disposed between the two sets of scrapers 32 and the housing 11, and a connecting plate 34 connected to the other side of the annular plate 31 and arranged in a ring array.

[0037] In practical use, when fuel is injected through the fuel inlet 18, it can impact the connecting plate 34. When the connecting plate 34 is impacted, it can drive the annular plate 31 to rotate. When the annular plate 31 rotates, it can drive the scraper 32 to rotate. Thus, the impurities attached to the inner wall of the outer casing 11 can be scraped off by the rotation of the scraper 32.

[0038] Preferably, the limiting part 33 includes limiting grooves 332 respectively opened on the surfaces of the two sets of scrapers 32 and a limiting ring 331 connected to the inner wall of the outer shell 11 and adapted to the size of the limiting grooves 332.

[0039] In practical use, when the scraper 32 rotates, it can drive the limiting groove 332 to slide on the surface of the limiting ring 331, which can limit the movement direction of the scraper 32.

[0040] Working principle: When using the fuel filter mechanism of this diesel locomotive, when fuel is injected into the interior of the outer shell 11 through the inlet 18, it can impact the connecting plate 34. When the connecting plate 34 is impacted, it can drive the annular plate 31 to rotate. When the annular plate 31 rotates, it can drive the scraper 32 to rotate. When the scraper 32 rotates, it can scrape off the impurities attached to the inner wall of the outer shell 11.

[0041] When the internal oil pressure of the outer casing 11 exceeds the threshold, the cover 212 can be squeezed. When the cover 212 is squeezed, the spring strip 211 can be compressed. When the cover 212 moves to the outside of the second sealing ring 232, the fuel can enter the interior of the filter cartridge 14 through the filter holes 214 on the surface of the cover 212, thereby accelerating the flow of fuel and filtering large particulate impurities when the oil pressure exceeds the threshold and oil is released.

[0042] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A fuel filtration mechanism for internal combustion locomotives, characterized in that, include: The outer shell (11) is provided on the outside for bearing protection, the outer shell cover (12) is fitted on the opening of the outer shell (11), the oil inlet (18) is provided on the surface of the outer shell cover (12) in a ring array, the outer sealing ring (13) is connected to the end of the outer shell (11) for fixing the outer shell cover (12), the filter cartridge (14) is provided inside the outer shell (11), the filter paper core (15) is connected to the outer surface of the filter cartridge (14), the check valve (16) is connected to the inner wall of the outer shell cover (12) and seals against the filter cartridge (14), the alloy spring (17) is connected to the inner wall of the outer shell (11) and abuts against the filter cartridge (14), and the safety valve assembly (2) is connected to the inner wall of the filter cartridge (14) and connected to the inner wall of the outer shell (11). The inner wall of the outer shell (11) is connected to a cleaning assembly (3) for cleaning the inner wall. The safety valve assembly (2) includes a plug (21) connected to the inner wall of the filter cartridge (14), a guide (22) connected between the plug (21) and the filter cartridge (14), and a sealing part (23) connected between the plug (21) and the outer shell (11).

2. The fuel filtration mechanism for internal combustion locomotives according to claim 1, characterized in that: The sealing part (21) includes a spring strip (211) connected to the inner wall of the filter cylinder (14), a cap (212) connected to the end of the spring strip (211) and inserted into the opening of the filter cylinder (14), and a first sealing ring (213) connected to the side surface of the cap (212) and abutting against the inner wall of the filter cylinder (14).

3. The fuel filtration mechanism for internal combustion locomotives according to claim 2, characterized in that: The end surface of the cap (212) is also provided with filter holes (214).

4. The fuel filtration mechanism for internal combustion locomotives according to claim 2, characterized in that: The guide part (22) includes a guide hole (221) connected to the surface of the cover (212) and a guide rod (222) that passes through the guide hole (221) and is connected to the inner wall of the filter cartridge (14).

5. A fuel filtration mechanism for internal combustion locomotives according to claim 2, characterized in that: The sealing part (23) includes a cylinder (231) connected to the inner wall of the outer shell (11) and a second sealing ring (232) connected to the inner wall of the cylinder (231) and abutting against the cap (212).

6. The fuel filtration mechanism for internal combustion locomotives according to claim 1, characterized in that: The cleaning component (3) includes an annular plate (31) disposed on the inner wall of the outer shell (11), two sets of scrapers (32) connected to the side wall of the annular plate (31) and arranged in a spiral shape, a limiting part (33) disposed between the two sets of scrapers (32) and the outer shell (11), and a connecting plate (34) connected to the other side of the annular plate (31) and arranged in a ring array.

7. A fuel filtration mechanism for internal combustion locomotives according to claim 6, characterized in that: The limiting part (33) includes limiting grooves (332) respectively opened on the surfaces of the two sets of scrapers (32) and a limiting ring (331) connected to the inner wall of the outer shell (11) and adapted to the size of the limiting grooves (332).

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