Filtering structure of suction filter

Abstract

The utility model discloses a suction filter filtering structure which comprises an upper shell, a lower shell, a first filtering layer and a second filtering layer, the first filtering layer and the second filtering layer are stacked between the upper shell and the lower shell, the second filtering layer is arranged away from a liquid inlet, the first filtering layer is arranged close to the liquid inlet, a liquid guide hole is formed in the first filtering layer, and the liquid guide hole is communicated with the liquid guide hole. A flow blocking area is arranged on the first filter layer, and the liquid guide holes are at least distributed in one side of the first filter layer. According to the filter structure of the suction filter, the liquid guide holes formed in the first filter layer can accelerate the flow speed of hydraulic oil near the liquid guide holes, so that the hydraulic oil flows close to the liquid guide holes and quickly passes through the first filter layer through the liquid guide holes, and therefore, bubbles can be prevented from staying and accumulating in the first filter layer to form large bubbles; according to the oil pump, bubbles staying between the first filter layer and the second filter layer can be reduced, accumulation of the bubbles is reduced by dispersing and guiding hydraulic oil, and defects and abnormalities such as noise and cavitation caused by the bubbles during working of the oil pump are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of suction filter production, and particularly relates to a suction filter filtering structure. Background Technique

[0002] In an automobile transmission, an oil pump is usually used to pump engine oil to lubricate gears, bearings, etc. When the gears in the transmission rotate, the engine oil in the transmission will be disturbed, causing air to be drawn in when the oil pump pumps the engine oil, so that part of the air is dissolved in the transmission oil.

[0003] According to the utility model patent application with the publication number: CN217029892U and the publication date of July 22, 2022, a transmission suction filter is disclosed, belonging to the technical field of suction filters. It includes a housing, the housing includes a bottom shell, a shell cover is covered on the bottom shell, a filter paper is arranged between the bottom shell and the shell cover, an oil inlet is opened on the bottom shell, an oil suction pipe is arranged on the shell cover, and the oil suction pipe is communicated with the inside of the shell cover; a gear baffle is also installed on the shell cover, and the gear baffle is used to isolate the transmission gears from contacting the engine oil. Its main technical effect is: by installing a gear baffle on the shell cover, the gear baffle isolates the engine oil in the transmission from the gears in the transmission, reduces the agitation of the engine oil by the rotation of the gears in the transmission, and avoids air being mixed into the pumped engine oil when the oil pump pumps the engine oil, thereby avoiding damaging the oil pump and causing the vehicle gears to malfunction.

[0004] During the transmission process, the hydraulic oil inside is stirred and contains some air dissolved in it, that is, the hydraulic oil contains some bubbles. In the prior art, a single-layer filter paper is provided inside the suction filter, and the hydraulic oil is sucked from the input end through the single-layer filter paper to the output end of the suction filter by a negative pressure pump for filtration. During the filtration process, the hydraulic oil can easily pass through the single-layer filter paper, while the bubbles will be left on one side of the single-layer filter paper. A large number of small bubbles will accumulate to form large bubbles. When the large bubbles quickly pass through the single-layer filter paper, noise will be generated, resulting in abnormal noise during use. Therefore, a suction filter filtering structure is proposed, aiming to solve the problem that in the prior art, a large number of small bubbles accumulate to form large bubbles in the suction filter structure with a single-layer filter paper, and noise is generated when the large bubbles quickly pass through the single-layer filter paper. Content of the Utility Model

[0005] The purpose of the utility model is to provide a suction filter filtering structure, aiming to solve the problem that in the prior art, a large number of small bubbles accumulate to form large bubbles in the suction filter structure with a single-layer filter paper, and noise is generated when the large bubbles quickly pass through the single-layer filter paper.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A suction filter filtering structure comprises an upper shell and a lower shell, wherein the upper shell is provided with a liquid outlet, and the lower shell is provided with a liquid inlet, and further comprises a first filter layer and a second filter layer, wherein the first filter layer and the second filter layer are stacked and arranged between the upper shell and the lower shell, the second filter layer is arranged away from the liquid inlet, and the first filter layer is arranged close to the liquid inlet, liquid guide holes are opened on the first filter layer, a flow blocking area is provided on the first filter layer, and the liquid guide holes are distributed on at least one side of the first filter layer.

[0008] Preferably, the diameter of the liquid conducting holes located in the first filter layer close to the flow blocking area is smaller than the diameter of the liquid conducting holes away from the flow blocking area.

[0009] Preferably, a positioning column is provided on the lower shell, and a positioning hole is provided on the first filter layer and the second filter layer.

[0010] Preferably, a guide block is provided on the inner wall of the upper shell, and a guide channel is formed between a plurality of the guide blocks.

[0011] Preferably, the diameter of the liquid guide hole is 1 mm-5 mm.

[0012] In the above technical solution, the utility model provides a suction filter filtering structure, which has the following beneficial effects:

[0013] In the utility model, the first filter layer and the second filter layer arranged inside the upper shell and the lower shell can filter the internal hydraulic oil in steps, and the flow rate of the hydraulic oil near the liquid guide hole can be accelerated through the liquid guide hole opened on the first filter layer, so that the hydraulic oil flows close to the liquid guide hole and quickly passes through the first filter layer through the liquid guide hole, thereby preventing bubbles from staying in the first filter layer and accumulating to form large bubbles. At the same time, since the flow rate of the hydraulic oil is accelerated when passing through the liquid guide hole, it can quickly pass through the second filter layer, reducing the number of bubbles staying between the first filter layer and the second filter layer. By dispersing and guiding the hydraulic oil, the accumulation of bubbles is reduced, and the noise, cavitation and other abnormal defects caused by bubbles when the oil pump is working are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall three-dimensional structure provided for an embodiment of the utility model;

[0016] Figure 2A schematic diagram of an assembly structure provided for an embodiment of the utility model;

[0017] Figure 3 A schematic diagram of an explosion structure viewed from above provided by an embodiment of the utility model;

[0018] Figure 4 A schematic diagram of the three-dimensional structure of the first filter layer provided in an embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of a liquid guide hole provided in the flow blocking area according to an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Upper shell; 11. Liquid outlet; 12. Guide block; 2. Lower shell; 3. First filter layer; 31. Liquid guide hole; 32. Flow blocking area; 4. Second filter layer; 5. Positioning hole. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] See also Figure 1 —4. A suction filter filtering structure, comprising an upper shell 1 and a lower shell 2, wherein the upper shell 1 is provided with a liquid outlet 11, and the lower shell 2 is provided with a liquid inlet 21, and further comprising a first filter layer 3 and a second filter layer 4, wherein the first filter layer 3 and the second filter layer 4 are stacked between the upper shell 1 and the lower shell 2, the second filter layer 4 is arranged away from the liquid inlet 21, the first filter layer 3 is arranged close to the liquid inlet 21, a liquid guide hole 31 is opened on the first filter layer 3, a flow blocking area 32 is provided on the first filter layer 3, and the liquid guide holes 31 are distributed on at least one side of the first filter layer 3.

[0024] The upper housing 1 and the lower housing 2 are connected by hot melt welding to ensure the overall sealing performance. An outlet 11 is provided on the upper housing 1, and an inlet 21 is provided on the lower housing 2. A suction pump is connected to the outlet 11. The hydraulic oil enters the interior of the lower housing 2 through the inlet 21. Through the suction action of the suction pump, the hydraulic oil is sucked from the inlet 21 towards the outlet 11. The first filter layer 3 and the second filter layer 4 are stacked between the upper housing 1 and the lower housing 2, that is, the first filter layer 3 is located below the second filter layer 4. The first filter layer 3 is arranged close to the inlet 21, and the second filter layer 4 is arranged close to the outlet 11. It should be noted that the order of the first filter layer 3 and the second filter layer 4 can be adjusted according to actual usage requirements. The liquid guide holes 31 can be opened on the second filter layer 4. When the hydraulic oil enters the filter from the inlet 21, it first passes through the first filter layer 3, then through the second filter layer 4, and finally flows out through the outlet 11 to complete the filtration. Liquid guide holes 31 are provided on the first filter layer 3, and the liquid guide holes 31 are at least distributed on one side of the first filter layer 3. As a specific embodiment provided by the present invention, the number of the liquid guide holes 31 is several, and several liquid guide holes 31 are all distributed on both sides of the first filter layer 3. The liquid guide holes 31 located between both sides of the first filter layer 3 form a flow blocking area 32. Among them, the liquid guide holes 31 located on one side of the first filter layer 3 are evenly distributed, that is, the distance between adjacent liquid guide holes 31 is equal.

[0025] As another embodiment provided by the present utility model, the liquid guide holes 31 located on one side of the first filter layer 3 are randomly distributed, that is, the distance between two adjacent liquid guide holes 31 is not equal.

[0026] It should be noted that diversion holes 31 can be opened on the flow blocking area 32 according to actual tests to ensure the effect of guiding and dispersing bubbles.

[0027] As an embodiment provided by the present invention, during use, after the hydraulic oil enters the interior of the lower housing 2, since the liquid guide holes 31 opened on the first filter layer 3 are located on both sides of the first filter layer 3 and the flow blocking area 32 is located in the middle of the first filter layer 3, after the hydraulic oil enters the interior of the lower housing 2, due to the small hydraulic oil resistance at the liquid guide holes 31 on the first filter layer 3 and the large hydraulic oil resistance in the flow blocking area 32, therefore, the hydraulic oil at the liquid guide holes 31 can quickly flow through the liquid guide holes 31 to the second filter layer 4, and the hydraulic oil in the flow blocking area 32 can flow towards the liquid guide holes 31. The hydraulic oil on the first filter layer 3 is quickly and evenly guided to the second filter layer 4 through the uniformly arranged liquid guide holes 31, and is secondarily filtered through the second filter layer 4, thereby being able to ensure the filtration effect of the hydraulic oil while eliminating bubble noise.

[0028] The flow blocking area 32 needs to be designed according to the internal oil path direction of the filter to block part of the hydraulic oil from quickly passing through the first filter layer 3.

[0029] As an embodiment provided by the present utility model, the shape of the liquid guide hole 31 is circular, and the diameter is 1 mm - 5 mm. It should be noted that the specific shape of the liquid guide hole 31 can be redesigned according to the size of the suction filter to ensure the filtering and diversion effects.

[0030] As other embodiments provided by the present utility model, the shape of the liquid guide hole 31 can be square, rhombus, triangle or other plane geometric figures.

[0031] In this utility model, the first filter layer 3 and the second filter layer 4 arranged inside the upper housing 1 and the lower housing 2 can filter the internal hydraulic oil step by step. By means of the liquid guide holes 31 opened on the first filter layer 3, the flow rate of the hydraulic oil near the liquid guide holes 31 can be increased, so that the hydraulic oil flows close to the liquid guide holes 31 and quickly passes through the first filter layer 3 through the liquid guide holes 31. Thereby, it can prevent air bubbles from staying and accumulating in the first filter layer 3 to form large air bubbles. At the same time, since the flow rate of the hydraulic oil is increased when passing through the liquid guide holes 31, it can quickly pass through the second filter layer 4, reducing the air bubbles staying between the first filter layer 3 and the second filter layer 4. By dispersing and guiding the hydraulic oil, the accumulation of air bubbles is reduced, avoiding defects such as noise and cavitation caused by air bubbles when the oil pump is working.

[0032] As an embodiment provided by the present utility model, as Figure 4 shown, the liquid guide holes 31 located on one side of the first filter layer 3 are evenly distributed, and the diameter of the liquid guide holes 31 close to the flow blocking area 32 is smaller than the diameter of the liquid guide holes 31 away from the flow blocking area 32, so that during filtration, the hydraulic oil is more likely to flow towards the edge of the first filter layer 3, and can better guide the air bubbles in the hydraulic oil.

[0033] As an embodiment provided by the present utility model, as Figure 2 shown, positioning posts 22 are provided on the lower housing 2, and positioning holes 5 are opened on both the first filter layer 3 and the second filter layer 4. During installation, both the first filter layer 3 and the second filter layer 4 can be positioned through the positioning holes 5 and the inner edge of the lower housing 2. It should be noted that the shapes of the first filter layer 3 and the second filter layer 4 are adapted to the inner shape of the lower housing 2, so that the first filter layer 3 and the second filter layer 4 can be embedded into the lower housing 2, facilitating the positioning of the first filter layer 3 and the second filter layer 4.

[0034] As an embodiment provided by the present utility model, flow guiding blocks 12 are provided on the inner wall of the upper housing 1, and flow guiding channels are formed between several flow guiding blocks 12. The setting of the flow guiding channels can facilitate the flow of the hydraulic oil from the liquid inlet 21 to the liquid outlet 11. At the same time, after the upper housing 1 and the lower housing 2 are hot melt welded, the flow guiding blocks 12 arranged inside the upper housing 1 can extrude the second filter layer 4 and the first filter layer 3, making the second filter layer 4 and the first filter layer 3 fit more closely to the inner wall of the lower housing 2.

[0035] As an embodiment provided by the present utility model, both the first filter layer 3 and the second filter layer 4 are integrally made of non-woven fabric to ensure the filtering effect on hydraulic oil.

[0036] As an alternative embodiment provided by the present utility model, the first filter layer 3 can be made of materials such as metal plates, plastic plates, wire meshes, etc., and the second filter layer 4 can be made of other filter materials.

[0037] Those skilled in the art can understand that other similar connection methods can also implement the present utility model. For example, methods such as welding, bonding, or screwing.

[0038] Only some exemplary embodiments of the present utility model have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A suction filter structure, comprising an upper housing (1) and a lower housing (2). An outlet (11) is provided on the upper housing (1), and an inlet (21) is provided on the lower housing (2). It is characterized in that, The invention also comprises a first filter layer (3) and a second filter layer (4), wherein the first filter layer (3) and the second filter layer (4) are stacked between an upper shell body (1) and a lower shell body (2), wherein the second filter layer (4) is arranged away from the liquid inlet (21), and the first filter layer (3) is arranged close to the liquid inlet (21), wherein the first filter layer (3) is provided with liquid guide holes (31), and wherein the first filter layer (3) is provided with a flow blocking area (32), wherein the liquid guide holes (31) are distributed at least on one side of the first filter layer (3).

2. The filtering structure of a suction filter according to claim 1, wherein, The diameter of the liquid conducting holes (31) located in the first filter layer (3) close to the flow blocking area (32) is smaller than the diameter of the liquid conducting holes (31) away from the flow blocking area (32).

3. The filtering structure of a suction filter according to claim 1, characterized in that, The lower shell (2) is provided with a positioning column (22), and the first filter layer (3) and the second filter layer (4) are both provided with positioning holes (5).

4. The filtering structure of a suction filter according to claim 1, characterized in that, A flow guide block (12) is provided on the inner wall of the upper shell (1), and a flow guide channel is formed between a plurality of the flow guide blocks (12).

5. The filtering structure of a suction filter according to claim 1, wherein, The diameter of the liquid guide hole (31) is 1 mm-5 mm.

Images