Multi-stage filtering system for speed reducer

Abstract

The utility model belongs to the technical field of speed reducer lubrication, and particularly relates to a multi-stage filtering system for a speed reducer. Comprising a shell, and a rough filtration cavity, an oil pump cavity and a fine filtration cavity are formed in the shell; a rough filtering piece is installed in the rough filtering cavity, an oil pump body is installed in the oil pump cavity, and a fine filtering piece is installed in the fine filtering cavity. One end of the rough filtration cavity is provided with an oil suction hole, and the other end is communicated with the oil pump cavity; the fine filtration cavity communicates with the side wall of the oil pump cavity; a magnetic attraction piece is arranged on the periphery of the oil suction hole in the shell; and the lubricating oil in the shell is effectively and fully filtered, so that the cleanliness of the oil product is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of speed reducer lubrication technology, and specifically relates to a multi-stage filtration system for speed reducers. Background Technology

[0002] In new energy vehicle reducer systems, a large amount of metal or non-metal debris is generated during the processing and production of various components. Subsequent cleaning processes can only remove some of the larger debris; most of the smaller debris is assembled into the reducer assembly along with the parts. Some ferromagnetic impurities are attracted by the magnets inside the reducer, while non-ferromagnetic impurities are washed onto the surfaces of all components along with the reducer's lubricating oil. The reducer operates with precision; the introduction of impurities can lead to noise, causing it to lose its original quietness, and in severe cases, even causing the oil pump to seize or abnormal damage to moving parts such as gears and bearings.

[0003] Most existing technologies use coarse filters in conjunction with magnets. Magnets adsorb ferromagnetic impurities, while coarse filters remove non-ferromagnetic impurities. However, due to the limited adsorption capacity of magnets, some ferromagnetic impurities remain mixed in the lubricating oil. Furthermore, the limited filtration precision of coarse filters prevents effective filtration of small particles. Consequently, most small particles continue to flow with the lubricating oil, circulating among various components. Prolonged operation can cause oil pump jamming, abnormal wear of gears and bearing rollers, ultimately leading to abnormal noise and even damage to gears and bearings.

[0004] Therefore, there is an urgent need for a multi-stage filtration system that can improve the cleanliness of speed reducers. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a multi-stage filtration system for speed reducers, comprising a housing, wherein a coarse filter chamber, an oil pump chamber, and a fine filter chamber are provided inside the housing;

[0006] The coarse filter chamber is equipped with a coarse filter element, the oil pump chamber is equipped with an oil pump body, and the fine filter chamber is equipped with a fine filter element.

[0007] One end of the coarse filter chamber is provided with an oil suction hole, and the other end of the coarse filter chamber is connected to the oil pump chamber;

[0008] The inlet of the fine filter chamber is connected to the side wall of the oil pump chamber, and the outlet of the fine filter chamber is connected to the lubrication system.

[0009] A magnetic suction device is installed inside the housing near the oil suction hole.

[0010] Furthermore, a pre-pump filter is provided at one end of the oil pump body near the coarse filter.

[0011] Furthermore, the coarse filter element is an oil suction filter.

[0012] Furthermore, the fine filter element is a metal mesh filter.

[0013] Furthermore, the magnetic attractor is a magnet.

[0014] Furthermore, the pre-pump filter element is a pre-pump steel mesh, which is a high-strength stainless steel fine-weave mesh.

[0015] Furthermore, an oil passage No. 1 is provided inside the housing. One end of the oil passage No. 1 is connected to the side wall of the oil pump chamber, and the other end of the oil passage No. 1 is connected to the interior of the fine filter chamber.

[0016] Furthermore, the magnet is rectangular in shape and is installed near the oil suction hole.

[0017] Furthermore, the precision of the coarse filter element is ≤100μm.

[0018] Furthermore, the precision of the fine filter element is ≤35μm.

[0019] Beneficial effects

[0020] The advantages of this utility model over the prior art are as follows:

[0021] 1. This application effectively and thoroughly filters the lubricating oil in the housing by using a combination of magnets, coarse filter, pre-pump steel mesh, and fine filter, which significantly improves the cleanliness of the oil, effectively enhances the NVH (noise, vibration, and harshness) characteristics of the reducer, and improves the durability and reliability of gear and bearing moving parts. It has high structural reliability and a wide range of applications.

[0022] 2. By using a multi-stage segmented filtration scheme, this application can significantly reduce the filtration size of each stage of the filtration system, while improving the durability and reliability of each stage of the filtration system.

[0023] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the internal structure of the housing without installation is shown in an embodiment of this utility model.

[0026] Figure 2 A schematic diagram of the structure installed inside the housing in an embodiment of this utility model is shown.

[0027] Figure 3 A schematic diagram of the oil pump body in an embodiment of this utility model is shown.

[0028] In the diagram, 1. Housing; 2. Magnetic suction component; 3. Oil suction hole; 4. Coarse filter chamber; 5. Coarse filter component; 6. Oil pump chamber; 7. Oil pump body; 8. Pre-pump filter component; 9. Oil passage No. 1; 91. Oil passage one; 92. Oil passage two; 10. Fine filter chamber; 11. Fine filter component. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] This application provides a multi-stage filtration system for a speed reducer, referenced... Figure 1 It includes a housing 1, and the housing 1 is provided with a coarse filter chamber 4, an oil pump chamber 6 and a fine filter chamber 10;

[0031] refer to Figure 2 The coarse filter chamber 4 is equipped with a coarse filter element 5, the oil pump chamber 6 is equipped with an oil pump body 7, and the fine filter chamber 10 is equipped with a fine filter element 11.

[0032] One end of the coarse filter chamber 4 is provided with an oil suction hole 3, and the other end of the coarse filter chamber 4 is connected to the oil pump chamber 6.

[0033] The fine filter chamber 10 is connected to the side wall of the oil pump chamber 6;

[0034] A magnetic suction element 2 is provided inside the housing 1 around the oil suction hole 3.

[0035] In one embodiment of this utility model, reference is made to... Figure 3 The oil pump body 7 is provided with a pre-pump filter 8 at one end near the coarse filter 5;

[0036] The coarse filter chamber 4 and the oil pump chamber 6 are located on the same horizontal axis, and the axis of the fine filter chamber 10 is perpendicular to the axis of the oil pump chamber 6. Before entering the coarse filter chamber 4, the lubricating oil passes through the magnetic suction component 2, which adsorbs ferromagnetic impurity particles in the lubricating oil. The lubricating oil enters the coarse filter chamber 4 through the oil suction hole 3 and passes through the coarse filter component 5 to filter out large particles of impurities. The lubricating oil that has passed through the coarse filter chamber 4 flows into the oil pump chamber 6. When the oil pump draws in the lubricating oil, the pre-pump filter component 8 filters the debris generated on the surface of the oil pump body 7 or during the assembly process.

[0037] After the oil pump body 7 draws in the lubricating oil, it pressurizes the oil and pumps it into the oil pump chamber 6. Then, the lubricating oil enters the fine filter chamber 10 from the side wall of the oil pump chamber 6, where it passes through the fine filter element 11 to filter out small particulate impurities. Finally, clean lubricating oil passes through the central hole of the fine filter element 11 (…). Figure 2 As shown in the diagram, the fluid flows to the oil cooler and then into various subsystems that require cooling and lubrication for lubrication.

[0038] This application uses a combination of magnets, coarse filters, pre-pump steel mesh, and fine filters to effectively and thoroughly filter the lubricating oil in the housing 1, significantly improving oil cleanliness, effectively enhancing the NVH characteristics of the reducer, and improving the durability and reliability of the oil pump body 7, gears, bearings, and other moving parts.

[0039] This solution addresses the issue of poor cleanliness in reducer components, preventing NVH problems, oil pump malfunctions, and abnormal damage to moving parts such as gear shafts and bearings caused by poor component cleanliness. It effectively filters impurities in the reducer lubricating oil, significantly improving the NVH performance of the reducer assembly.

[0040] In one embodiment of this utility model, the coarse filter element 5 is an oil suction filter.

[0041] The precision of the coarse filter element 5 is ≤100μm.

[0042] An oil suction filter is installed at the oil suction port of the oil pump body 7 to protect the oil pump body 7 and prevent the intake of large mechanical impurities.

[0043] In one embodiment of this utility model, the fine filter element 11 is a metal mesh filter.

[0044] The precision of the fine filter element 11 is ≤35μm.

[0045] With a precision of 30μm, the filter screen offers higher filtration accuracy.

[0046] In one embodiment of this utility model, the magnetic suction element 2 is a magnet;

[0047] The magnets initially adsorb ferromagnetic impurities.

[0048] In one embodiment of this utility model, the pre-pump filter element 8 is a pre-pump steel mesh, which is a high-strength stainless steel dense mesh.

[0049] The steel mesh in front of the pump is 40 mesh with an actual side length of 0.425mm for the square holes; this prevents assembly debris from passing through the pump body 7; it can effectively intercept the chips introduced by the pump body 7 itself and the assembly process, avoiding cleanliness issues introduced in the intermediate links of the system.

[0050] In one embodiment of the present invention, an oil passage 9 is provided inside the housing 1. One end of the oil passage 9 is connected to the side wall of the oil pump chamber 6, and the other end of the oil passage 9 is connected to the interior of the fine filter chamber 10.

[0051] The first channel includes oil channel 1 91 and oil channel 2 92. Oil channel 1 91 is connected to the oil pump chamber 6, and oil channel 2 92 is connected to the fine filter chamber 10. There is an inclined angle between oil channel 1 91 and oil channel 2 92, which can be 90°.

[0052] In one embodiment of this utility model, the magnet is rectangular and is installed near the oil suction hole 3;

[0053] The magnet can also be made into a ring shape, and the inner diameter of the magnet is larger than the diameter of the oil suction hole 3.

[0054] If the magnets are set in a ring shape and distributed around the oil suction hole 3, the area for adsorbing magnetic impurities in the lubricating oil as a whole can be increased and the adsorption effect can be enhanced.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage filtration system for a speed reducer, characterized in that, Includes a housing (1), and the housing (1) is provided with a coarse filter chamber (4), an oil pump chamber (6) and a fine filter chamber (10). A coarse filter element (5) is installed in the coarse filter chamber (4), an oil pump body (7) is installed in the oil pump chamber (6), and a fine filter element (11) is installed in the fine filter chamber (10). One end of the coarse filter chamber (4) is provided with an oil suction hole (3), and the other end of the coarse filter chamber (4) is connected to the oil pump chamber (6); The input end of the fine filter chamber (10) is connected to the side wall of the oil pump chamber (6), and the output end of the fine filter chamber (10) is connected to the lubrication system; A magnetic suction element (2) is provided inside the housing (1) near the oil suction hole (3).

2. The multi-stage filtration system for a speed reducer according to claim 1, characterized in that, The oil pump body (7) is provided with a pre-pump filter (8) at one end near the coarse filter (5).

3. A multi-stage filtration system for a speed reducer according to claim 1, characterized in that, The coarse filter element (5) is an oil suction filter.

4. A multi-stage filtration system for a speed reducer according to claim 1, characterized in that, The fine filter element (11) is a metal mesh filter.

5. A multi-stage filtration system for a speed reducer according to claim 1, characterized in that, The magnetic chuck (2) is a magnet.

6. A multi-stage filtration system for a speed reducer according to claim 2, characterized in that, The pre-pump filter element (8) is a pre-pump steel mesh, which is a high-strength stainless steel dense mesh.

7. A multi-stage filtration system for a speed reducer according to claim 1, characterized in that, The housing (1) has an oil passage (9) inside. One end of the oil passage (9) is connected to the side wall of the oil pump chamber (6), and the other end of the oil passage (9) is connected to the interior of the fine filter chamber (10).

8. A multi-stage filtration system for a speed reducer according to claim 5, characterized in that, The magnet is rectangular and is installed near the oil suction hole (3).

9. A multi-stage filtration system for a speed reducer according to claim 2, characterized in that, The precision of the coarse filter element (5) is ≤100μm.

10. A multi-stage filtration system for a speed reducer according to claim 1, characterized in that, The precision of the fine filter element (11) is ≤35μm.

Images