Double-layer composite hydraulic filter

Abstract

The utility model discloses a double-layer composite hydraulic filter, which belongs to the technical field of hydraulic filters, and comprises an inner filter cartridge and an outer filter cartridge, the top surface and the bottom surface of the outer filter cartridge are sealed through end covers, a filter paper layer is arranged on the outer side of the cartridge wall of the outer filter cartridge, and the filter paper layer is arranged on the outer side of the cartridge wall of the outer filter cartridge. The inner-layer filter cartridge is arranged on the inner side of the outer-layer filter cartridge, a filter interlayer is further arranged between the outer-layer filter cartridge and the inner-layer filter cartridge, and an oil port is formed in the inner-layer filter cartridge. The hydraulic filter is arranged to be of a double-layer structure with the outer-layer filter cylinder and the inner-layer filter cylinder, the use strength of the hydraulic filter is improved through double supporting, the service life of the hydraulic filter is prolonged, the filter paper layer and the filter interlayer are arranged on the outer side of the outer-layer filter cylinder and the outer side of the inner-layer filter cylinder respectively, the filter paper layer is used for first filtration, and once the filter paper layer is damaged, the filter paper layer is not damaged. The filtering interlayer can effectively intercept entering impurities, the filtering effect of hydraulic oil is guaranteed, and the use stability is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic filters, and in particular relates to a double-layer composite hydraulic filter. Background Art

[0002] The hydraulic filter is a filtering device used in hydraulic systems to filter out particulate debris and rubber impurities in the system to ensure the cleanliness of the hydraulic system. The traditional hydraulic filter is a single-layer structure, that is, a combination of a skeleton and a filter paper layer. The impurities in the hydraulic oil are filtered through the filter paper layer to ensure the cleanliness of the hydraulic oil. The traditional single-layer hydraulic filter, because the filtering structure only passes through one layer of filter paper, once the filter paper layer is damaged, it will seriously affect the filtering effect of the hydraulic filter. At the same time, the strength of the single-layer composite hydraulic filter is general, and the service life of the filter paper layer is low, which requires frequent replacement of the hydraulic filter, seriously affecting the use effect. Utility Model Content

[0003] The utility model aims to provide a double-layer composite hydraulic filter to solve the problems of the existing hydraulic filter in the use process mentioned in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-layer composite hydraulic filter, comprising an inner filter cartridge and an outer filter cartridge, the top surface and the bottom surface of the outer filter cartridge are sealed by end covers, a filter paper layer is arranged on the outer side of the cylinder wall of the outer filter cartridge, the inner filter cartridge is arranged on the inner side of the outer filter cartridge, and a filter interlayer is also arranged between the outer filter cartridge and the inner filter cartridge, and an oil passage opening is opened on the inner filter cartridge.

[0005] Preferably, the filter interlayer is made of PP cotton.

[0006] Preferably, oil holes are formed on the walls of the inner filter cartridge and the outer filter cartridge.

[0007] Preferably, a metal mesh cover is provided on the outer side of the filter paper layer, and metal wires are woven inside the filter paper layer.

[0008] Preferably, the inner filter cartridge and the outer filter cartridge are both made of stainless steel.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The hydraulic filter is set as a double-layer structure of an outer filter cartridge and an inner filter cartridge. The double support improves the use strength of the hydraulic filter and increases the service life of the hydraulic filter. Filter paper layers and filter interlayers are respectively set on the outsides of the outer filter cartridge and the inner filter cartridge. The filter paper layer is used for the first filtration. Once the filter paper layer is damaged, the filter interlayer can effectively intercept the incoming impurities, thereby ensuring the filtering effect of the hydraulic oil and improving the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the vertical section structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0013] In the figure: 1. Outer filter cartridge; 2. Filter paper layer; 3. Metal mesh cover; 4. Inner filter cartridge; 5. Filter interlayer; 6. Oil outlet. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] Reference Figure 1-2 A double-layer composite hydraulic filter comprises an inner filter cartridge 4 and an outer filter cartridge 1. The top and bottom surfaces of the outer filter cartridge 1 are sealed by end covers. A filter paper layer 2 is arranged on the outer side of the cylinder wall of the outer filter cartridge 1. The inner filter cartridge 4 is arranged on the inner side of the outer filter cartridge 1, and a filter interlayer 5 is arranged between the outer filter cartridge 1 and the inner filter cartridge 4. An oil passage 6 is opened on the inner filter cartridge.

[0016] In view of the problems that the existing single-layer hydraulic filter has low strength and short service life during use, and once the filter layer of the hydraulic filter is damaged, it directly affects the filtering effect of the hydraulic filter, this scheme proposes a double-layer composite hydraulic filter, the hydraulic filter includes an inner filter cartridge 4 and an outer filter cartridge 1, a filter paper layer 2 is arranged on the outer side of the outer filter cartridge 1 as the first filtration, which effectively filters impurities and particulate matter, and a filter interlayer 5 is arranged between the inner filter cartridge 4 and the outer filter cartridge 1. Once the filter paper layer 2 is damaged, the filter interlayer 5 can effectively intercept impurities entering from the damaged part, fully ensure the cleanliness of the hydraulic oil, and improve the filtering effect; at the same time, the structure of the double-layer filter cartridge makes the hydraulic filter stronger, has good impact resistance and deformation resistance during use, and has higher durability.

[0017] Furthermore, the filter interlayer 5 is made of PP cotton.

[0018] Through this technical solution, the filter interlayer 5 is made of PP cotton material, which has good permeability. Therefore, during normal filtering use, the filter interlayer 5 has little effect on the filtering speed of the hydraulic oil, thereby ensuring the filtering speed of the hydraulic oil; the filter interlayer 5 is arranged in the gap between the inner filter cartridge 4 and the outer filter cartridge 1, and the inner filter cartridge 4 and the outer filter cartridge 1 can effectively shape and protect the filter interlayer 5, thereby avoiding deformation of the filter interlayer 5 made of PP cotton during use, thereby ensuring the durability of the hydraulic filter.

[0019] Furthermore, oil holes are provided on the walls of the inner filter cartridge 4 and the outer filter cartridge 1 .

[0020] Through this technical solution, oil holes are opened on the walls of the inner filter cartridge 4 and the outer filter cartridge 1, and the oil holes are used to pass the filtered hydraulic oil. The oil holes on the outer filter cartridge 1 have a larger aperture to facilitate the passage of hydraulic oil, and the oil holes on the inner filter cartridge 4 are denser and have a smaller aperture to facilitate the penetration of hydraulic oil.

[0021] Furthermore, a metal mesh cover 3 is provided on the outside of the filter paper layer 2 , and metal wires are woven inside the filter paper layer 2 .

[0022] In this solution, the metal mesh cover 3 is used to improve the impact resistance of the hydraulic oil, and the filter paper layer 2 can also be woven with metal wires to ensure strength, thereby preventing the filter paper layer 2 from deformation and damage and improving the use effect.

[0023] Furthermore, the filter cartridge and the outer filter cartridge 1 are both made of stainless steel.

[0024] Through this technical solution, the strength and corrosion resistance of the hydraulic filter are guaranteed, thereby increasing the service life of the hydraulic filter.

[0025] Working principle: This scheme proposes a double-layer composite hydraulic filter, which includes an inner filter cartridge 4 and an outer filter cartridge 1. A filter paper layer 2 is arranged on the outside of the outer filter cartridge 1 as the first filtration to effectively filter impurities and particulate matter. A filter interlayer 5 is arranged between the inner filter cartridge 4 and the outer filter cartridge 1. Once the filter paper layer 2 is damaged, the filter interlayer 5 can effectively intercept impurities entering from the damaged part, fully ensuring the cleanliness of the hydraulic oil and improving the filtering effect. The structure of the double-layer filter cartridge makes the hydraulic filter stronger, has good impact resistance and deformation resistance during use, and has higher durability.

[0026] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present invention and features of different embodiments or examples without contradiction.

[0027] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer composite hydraulic filter, characterized in that: It includes an inner filter cartridge and an outer filter cartridge. The top and bottom surfaces of the outer filter cartridge are sealed by end covers. A filter paper layer is arranged on the outer side of the cartridge wall of the outer filter cartridge. The inner filter cartridge is arranged on the inner side of the outer filter cartridge. A filter interlayer is also arranged between the outer filter cartridge and the inner filter cartridge. An oil passage is opened on the inner filter cartridge.

2. A double-layer composite hydraulic filter according to claim 1, characterized in that: The filter interlayer is made of PP cotton.

3. A double-layer composite hydraulic filter according to claim 1, characterized in that: The inner filter cartridge and the outer filter cartridge have oil holes on their walls.

4. A double-layer composite hydraulic filter according to claim 1, characterized in that: A metal mesh cover is arranged on the outer side of the filter paper layer, and metal wires are woven inside the filter paper layer.

5. A double-layer composite hydraulic filter according to claim 1, characterized in that: The inner filter cartridge and the outer filter cartridge are both made of stainless steel.

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