A shock resistant diesel fuel filter

Abstract

The utility model relates to filter technology field, and disclose a kind of anti-vibration diesel filter, including filter core and shell, the upper end of the filter core is with the upper end cover of the shell between being provided with first axial spring, the lower end of the filter core is with the lower end cover of the shell between being provided with second axial spring;Annular composite elastic support ring is arranged between the side portion of the filter core and the inner wall of the shell;The filter core is internally provided with active energy-absorbing structure for consuming vibration energy.The anti-vibration diesel filter, through the active energy-absorbing structure being arranged in the filter core interior, innovatively converts the vibration energy transmitted to the filter core interior into heat energy dissipation, fundamentally solves the problem that the center tube fatigue cracking and filter material shedding caused by lacking internal energy-absorbing mechanism of existing filter, improves the service life and reliability of diesel filter under harsh working conditions.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to an anti-vibration diesel filter. Background Technology

[0002] A diesel fuel filter is a filtration component in a diesel engine's fuel system. It is used to filter impurities, moisture, and gum from diesel fuel to ensure that the fuel delivered to precision components such as the high-pressure fuel pump and injectors is clean, thereby ensuring stable engine operation and reducing wear and emissions.

[0003] Currently, common spin-on diesel filters on the market typically include a housing, a filter element assembly housed within the housing, and upper and lower end caps for sealing the housing. The filter element assembly usually consists of filter media, a central tube, and upper and lower end caps.

[0004] In existing technologies, filter element assemblies are often secured within the housing using spring clamping or snap-fit ​​structures. For example, a single spring is used between the top cover and the top of the filter element to provide axial clamping force and prevent the filter element from shifting.

[0005] However, this traditional fixing method has obvious shortcomings. First, its axial vibration resistance relies solely on the preload of the spring. When facing diesel engines, especially in applications such as construction machinery and commercial vehicles, the buffering effect is limited when encountering common severe and multi-frequency vibrations, which can easily lead to impact wear between the filter element and the end cap. Furthermore, existing filters generally lack internal energy absorption mechanisms. Under continuous external vibration excitation, the filter element itself will generate alternating stress inside and accumulate continuously, which can easily cause fatigue cracking of the central tube or detachment of the filter material from the end cap, affecting the filtration work and further affecting the safe operation of the engine.

[0006] Therefore, we propose an anti-vibration diesel filter to address the problems mentioned above. Utility Model Content

[0007] This utility model provides an anti-vibration diesel filter, which can solve the problem of filter element fatigue damage caused by the lack of internal energy absorption mechanism in the prior art.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: An anti-vibration diesel filter includes a filter element and a housing. A first axial spring is provided between the upper end of the filter element and the upper end cover of the housing, and a second axial spring is provided between the lower end of the filter element and the lower end cover of the housing. An annular composite elastic support ring is provided between the side of the filter element and the inner wall of the outer shell; The filter element is equipped with an active energy-absorbing structure to dissipate vibration energy.

[0009] Preferably, the upper cover includes an outer cover and an inner locking cover. The outer cover has an inner sleeve in the middle, and the inner locking cover has an outer sleeve in the middle. The outer sleeve is sleeved on the outside of the inner sleeve. The first axial spring is installed between the outer cover and the inner locking cover. A radial gap is provided between the outer sleeve and the inner sleeve, and an elastic buffer rubber ring is provided in the radial gap.

[0010] Preferably, the lower end cover has the same structure as the upper end cover, and the second axial spring is installed between the outer cover and the inner locking cover of the lower end cover.

[0011] Preferably, threaded grooves are provided inside both ends of the outer casing, the outer cover of the upper end cover is threadedly connected to the inner upper end of the outer casing, and the outer cover of the lower end cover is threadedly connected to the inner lower end of the outer casing.

[0012] Preferably, both the outer cover of the upper end cover and the outer cover of the lower end cover are provided with rotating grooves.

[0013] Preferably, both the outer cover of the upper end cover and the outer cover of the lower end cover are fixedly connected with rubber sealing rings.

[0014] Preferably, the annular composite elastic support ring includes a main elastic body layer in the inner layer, a reinforcing skeleton layer in the middle layer, and a wear-resistant layer in the outer layer.

[0015] Preferably, the wear-resistant layer is made of wear-resistant polyurethane, the reinforcing skeleton layer is made of spiral metal wire, and the main elastomer layer is made of hydrogenated nitrile rubber.

[0016] Preferably, the active energy absorption structure includes a central tube, which is fixedly disposed on the geometric central axis of the filter element, and its tube wall is provided with holes for clean fuel to pass through.

[0017] Preferably, a damping cavity is provided inside the central tube. The damping cavity is a closed cavity filled with high-viscosity damping silicone oil and a high-density mass block is suspended in the high-viscosity damping silicone oil.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are: I. This utility model significantly improves the axial vibration resistance of the filter by the synergistic effect of the first axial spring and the second axial spring, effectively avoiding the movement and wear of the filter element caused by axial impact; at the same time, the setting of the annular composite elastic support ring effectively suppresses the radial swing of the filter element and prevents it from being damaged by collision with the outer shell.

[0019] Second, this utility model innovatively converts the vibration energy transmitted to the filter element into heat energy dissipation through an active energy absorption structure set inside the filter element. This fundamentally solves the problems of fatigue cracking of the central tube and filter material detachment caused by the lack of an internal energy absorption mechanism in existing filters, and comprehensively improves the service life and reliability of diesel filters under harsh working conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall external structure of this utility model; Figure 2 This is a side sectional view of the present invention. Figure 3 This is a schematic diagram of the top cross-sectional structure of this utility model; Figure 4 For the present utility model Figure 2 A magnified structural diagram at point A.

[0021] The components are: 1. Outer shell; 2. Filter element; 3. First axial spring; 4. Second axial spring; 21. Outer cover; 211. Inner sleeve; 212. Rotating groove; 213. Elastic buffer rubber ring; 22. Inner clamping cover; 221. Outer sleeve; 5. Annular composite elastic support ring; 6. Central tube; 61. Damping cavity; 62. High viscosity damping silicone oil; 63. High density mass block. Detailed Implementation

[0022] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0023] Example 1: Please see Figure 1-4 This utility model provides a technical solution: An anti-vibration diesel filter includes a filter element 2 and a housing 1. A first axial spring 3 is provided between the upper end of the filter element 2 and the upper end cover of the housing 1, and a second axial spring 4 is provided between the lower end of the filter element 2 and the lower end cover of the housing 1. An annular composite elastic support ring 5 is provided between the side of the filter element 2 and the inner wall of the outer shell 1; The filter element 2 has an active energy absorption structure inside to dissipate vibration energy.

[0024] In the above scheme, when the filter is subjected to external vibration, the first axial spring 3 and the second axial spring 4 set between the upper and lower ends of the filter element 2 and the lower end and the outer shell 1 can effectively buffer the axial impact and prevent the filter element 2 from moving and wearing; at the same time, the annular composite elastic support ring 5 between the side of the filter element 2 and the inner wall of the outer shell 1 can suppress the radial swing of the filter element 2, thereby avoiding its collision with the shell. The active energy absorption structure inside the filter element 2 utilizes internal energy dissipation to convert the vibration energy transmitted to the filter element 2 into other forms of consumption, thereby significantly reducing the fatigue risk of the central tube 6 and the filter material caused by alternating stress, and solving the problem of easy damage to the filter element 2 caused by the lack of an internal energy absorption mechanism in existing filters.

[0025] In a further embodiment, the upper cover includes an outer cover 21 and an inner clamping cover 22. An inner sleeve 211 is provided in the middle of the outer cover 21, and an outer sleeve 221 is provided in the middle of the inner clamping cover 22. The outer sleeve 221 is sleeved on the outside of the inner sleeve 211. A first axial spring 3 is installed between the outer cover 21 and the inner clamping cover 22. A radial gap is provided between the outer sleeve 221 and the inner sleeve 211, and an elastic buffer rubber ring 213 is provided in the radial gap.

[0026] Through the above technical solution, the upper cover provides installation and movement space for the first axial spring 3 through the sliding sleeve structure of the outer cover 21 and the inner clamping cover 22, so that the spring can be smoothly compressed and rebounded when subjected to axial impact. The outer sleeve 221 and the inner sleeve 211 expand and contract relative to each other, thereby more effectively buffering the up and down vibration of the filter element 2.

[0027] The lower end cover has the same structure as the upper end cover, and the second axial spring 4 is installed between the outer cover 21 and the inner clamping cover 22 of the lower end cover.

[0028] Through the above technical solution, the lower end cover adopts the same structure as the upper end cover, so that the second axial spring 4 can also be stably installed and extended, thereby forming an equally effective axial buffer at the bottom of the filter. Together with the upper end, it ensures that the filter element 2 receives balanced elastic support in the axial direction, and is detachable for easy maintenance.

[0029] In a further embodiment, threaded grooves are provided inside both ends of the outer casing 1, the outer cover 21 of the upper end cover is threadedly connected to the upper end of the outer casing 1, and the outer cover 21 of the lower end cover is threadedly connected to the lower end of the outer casing 1.

[0030] Through the above technical solution, the outer shell 1 is fixed to the upper and lower end caps by means of threaded grooves and threaded connections. This method of connection is firm, can withstand fuel pressure and resist vibration, and facilitates the installation and removal of the filter.

[0031] Both the outer cover 21 of the upper end cover and the outer cover 21 of the lower end cover are provided with rotating grooves 212.

[0032] The above technical solution provides a force application point through the setting of the rotating groove 212, which allows the operator to easily tighten or loosen the outer cover 21, thereby smoothly completing the assembly or replacement of the filter.

[0033] Example 2: Please see Figure 1-4 Furthermore, in conjunction with Embodiment 1, it is further found that rubber sealing rings are fixedly connected to both the outer cover 21 of the upper end cover and the outer cover 21 of the lower end cover.

[0034] Through the above technical solution, the rubber sealing ring is compressed at the threaded connection between the outer cover 21 and the outer shell 1 to achieve a static seal between the outer cover 21 and the outer shell 1. It can prevent fuel from leaking from the threaded connection, thereby ensuring the sealing reliability of the filter in a vibration environment.

[0035] In a further embodiment, the annular composite elastic support ring 5 includes an inner main elastic body layer, a middle reinforcing skeleton layer, and an outer wear-resistant layer.

[0036] Through the above technical solution, the main elastic body layer is responsible for absorbing vibration energy and providing elastic restoring force, the reinforced skeleton layer prevents the support ring from undergoing permanent deformation under long-term compression, and the wear-resistant layer reduces frictional loss with the inner wall of the outer shell 1, thereby achieving long-term suppression of the radial sway of the filter element 2.

[0037] The wear-resistant layer is made of wear-resistant polyurethane, the reinforcing skeleton layer is made of spiral metal wire, and the main elastomer layer is made of hydrogenated nitrile rubber.

[0038] Through the above technical solution, wear-resistant polyurethane is used to ensure the durability of the outer layer of the support ring, the spiral metal wire provides the necessary radial support strength, and hydrogenated nitrile rubber ensures the elasticity and oil resistance of the inner layer in the diesel environment, so that the support ring can work stably for a long time under harsh working conditions.

[0039] In a further embodiment, the active energy absorption structure includes a central tube 6, which is fixedly mounted on the geometric central axis of the filter element 2, and its tube wall is provided with holes for clean fuel to pass through.

[0040] Through the above technical solution, the central tube 6 serves as a channel for clean fuel to flow to the outlet. Its robust structure enhances the overall rigidity of the filter element 2 and provides a core carrier for the installation of internal energy-absorbing elements.

[0041] In a further embodiment, a damping cavity 61 is provided inside the central tube 6. The damping cavity 61 is a sealed cavity filled with high-viscosity damping silicone oil 62, and a high-density mass block 63 is suspended in the high-viscosity damping silicone oil 62. The high-density mass block 63 can be a tungsten alloy sphere or a tungsten alloy cylinder.

[0042] Through the above technical solution, when the filter element 2 vibrates, the high-density mass block 63 moves in the damping cavity 61 due to inertia. The high-viscosity damping silicone oil 62 converts the kinetic energy of the high-density mass block 63 into heat energy through viscous resistance and dissipates it, thereby actively absorbing the vibration energy transmitted to the inside of the filter element 2 and effectively protecting the central tube 6 and the filter material.

[0043] The working principle of this anti-vibration diesel filter is as follows: When external vibration is transmitted to the filter, the first axial spring 3 and the second axial spring 4 jointly buffer the axial impact of the filter element 2, while the annular composite elastic support ring 5 suppresses the radial sway of the filter element 2. At the same time, the active energy absorption structure inside the filter element 2 continuously converts vibration energy into heat energy dissipation through the movement of the high-density mass block 63 in the high-viscosity damping silicone oil 62 within its damping cavity 61. Through the synergistic effect of the above three structures, comprehensive protection is achieved from the axial, radial and internal aspects of the filter element 2, ultimately effectively preventing the filter element 2 from being damaged due to vibration fatigue.

[0044] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A vibration-resistant diesel fuel filter, comprising a filter element (2) and a housing (1), characterized in that: A first axial spring (3) is provided between the upper end of the filter element (2) and the upper end cover of the outer shell (1), and a second axial spring (4) is provided between the lower end of the filter element (2) and the lower end cover of the outer shell (1). An annular composite elastic support ring (5) is provided between the side of the filter element (2) and the inner wall of the outer shell (1). The filter element (2) is equipped with an active energy absorption structure for consuming vibration energy.

2. The anti-vibration diesel filter according to claim 1, characterized in that: The upper cover includes an outer cover (21) and an inner clamping cover (22). The outer cover (21) has an inner sleeve (211) in the middle, and the inner clamping cover (22) has an outer sleeve (221) in the middle. The outer sleeve (221) is sleeved on the outside of the inner sleeve (211). The first axial spring (3) is installed between the outer cover (21) and the inner clamping cover (22). A radial gap is provided between the outer sleeve (221) and the inner sleeve (211), and an elastic buffer rubber ring (213) is provided in the radial gap.

3. The anti-vibration diesel filter according to claim 2, characterized in that: The lower end cover has the same structure as the upper end cover, and the second axial spring (4) is installed between the outer cover (21) and the inner clamping cover (22) of the lower end cover.

4. The anti-vibration diesel filter according to claim 2, characterized in that: The outer casing (1) has threaded grooves inside both ends. The outer cover (21) of the upper end cover is threadedly connected to the upper end of the outer casing (1), and the outer cover (21) of the lower end cover is threadedly connected to the lower end of the outer casing (1).

5. The anti-vibration diesel filter according to claim 4, characterized in that: Rotating grooves (212) are provided on the outer sides of both the outer cover (21) of the upper end cover and the outer cover (21) of the lower end cover.

6. The anti-vibration diesel filter according to claim 4, characterized in that: Both the outer cover (21) of the upper end cover and the outer cover (21) of the lower end cover are fixedly connected with rubber sealing rings.

7. The anti-vibration diesel filter according to claim 1, characterized in that: The annular composite elastic support ring (5) includes a main elastic body layer in the inner layer, a reinforcing skeleton layer in the middle layer, and a wear-resistant layer in the outer layer.

8. The anti-vibration diesel filter according to claim 7, characterized in that: The wear-resistant layer is made of wear-resistant polyurethane, the reinforcing skeleton layer is made of spiral metal wire, and the main elastomer layer is made of hydrogenated nitrile rubber.

9. The anti-vibration diesel filter according to claim 1, characterized in that: The active energy absorption structure includes a central tube (6), which is fixedly disposed on the geometric central axis of the filter element (2), and its tube wall is provided with holes for clean fuel to pass through.

10. A vibration-resistant diesel filter according to claim 9, characterized in that: The central tube (6) is provided with a damping cavity (61), which is a closed cavity filled with high viscosity damping silicone oil (62) and a high density mass block (63) is suspended in the high viscosity damping silicone oil (62).

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