A breathing cap with oil and gas separation device

Abstract

This utility model discloses a breathing cap with an oil-gas separation device, including a connector; a circular plate is provided on the upper part of the connector; a cap is provided on the top of the circular plate, and a cavity is formed between the cap and the circular plate; an annular inner folding plate is fixed to the lower surface of the circular plate; an outer folding plate is fixed to the outer edge of the circular plate; a circular upper surrounding plate is fixed to the upper surface of the circular plate; a plug is provided on the circular plate corresponding to the position inside the upper surrounding plate; a multi-layer plate-shaped filter element is provided below the plug; because the extended sleeve is long and far from the gearbox, when the oil mist comes into contact with the pipe wall, part of it is liquefied by cooling and flows back to the gearbox; the remaining oil mist enters the interior of the connector after being filtered and separated by the side wall of the cylindrical filter element, and comes into contact with the multi-layer plate-shaped filter element for oil-gas separation. The filter element blocks the oil (oil molecules) but allows gas to pass through, thereby separating gas and oil during the movement of oil mist toward the breathing cap, preventing the spraying of oil mist, and avoiding pollution of the surrounding environment and waste of oil.

Description

Technical Field

[0001] This utility model belongs to the field of oil-gas separation technology, specifically, it relates to a breathing cap with an oil-gas separation device. Background Technology

[0002] A breather cap, also known as an air filter, is mainly used to maintain the pressure balance between the inside of the gearbox and the outside atmospheric pressure during torque converter exhaust, and to prevent external dirt particles from entering the gearbox.

[0003] During transmission operation, the high-speed rotation of gears and other components agitates the hydraulic transmission fluid, causing it to swirl within the transmission and splash towards the breather cap, resulting in oil leakage. Simultaneously, internal friction and heat generation cause the oil temperature to rise, leading to fluid evaporation and the production of water vapor and other gases, increasing internal pressure. When this internal pressure exceeds atmospheric pressure, the gas is expelled through the breather cap. During this expulsion, due to the viscosity of the hydraulic transmission fluid, some fluid is carried away with the gas, forming an oil mist. When this oil mist encounters cooler external air, it condenses into droplets, potentially causing oil leakage at the breather cap's vent.

[0004] Therefore, it is common for breathing caps to leak or spray oil. However, in some demanding applications, oil droplets or sprays are not permitted, as this not only pollutes the surrounding environment but also wastes oil, which is a drawback. Utility Model Content

[0005] To address the technical problem that existing breathing caps spray oil during use and cannot meet the requirements of high-demand usage scenarios, this utility model provides a breathing cap with an oil-gas separation device.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A breathing cap with an oil-gas separation device includes a connector; a circular plate is provided on the upper part of the connector; a cap is provided on the top of the circular plate, and a cavity is formed between the cap and the circular plate; an annular inner folding plate is fixedly connected to the lower surface of the circular plate; an outer folding plate is fixedly connected to the outer edge of the circular plate; a circular upper surrounding plate is fixedly connected to the upper surface of the circular plate; a plug is provided on the circular plate at a position corresponding to the inside of the upper surrounding plate; a multi-layer plate-shaped filter element is provided below the plug; multiple second through holes are opened on the plug; a first through hole is opened on the circular plate at a position corresponding to the inside of the upper surrounding plate; and multiple exhaust holes are opened at positions corresponding to the positions between the inner and outer folding plates.

[0008] Furthermore, the circular plate is provided with an annular filter element at a position corresponding to the inside of the upper enclosure; the outer surface of the upper enclosure is recessed inward and forms a clearance groove with the inner wall of the upper enclosure.

[0009] Furthermore, the annular filter element is located below the plug; the plate-shaped filter element is disposed on the annular filter element.

[0010] Furthermore, the lower circumferential surface of the connector is provided with a threaded portion; an extension sleeve is connected to the threaded portion.

[0011] Furthermore, an annular slot is provided on the lower end face of the connector; a cylindrical filter element is installed inside the extension sleeve via the slot.

[0012] Furthermore, a circular cover is connected to the bottom of the cylindrical filter element.

[0013] Furthermore, the circular plate is expanded to the upper part of the joint through an internal folding plate; the circular plate is expanded to the cap through an external folding plate.

[0014] Furthermore, the oil and gas enter the interior of the connector, enter the cavity formed by the cap and the circular plate through the first through hole, pass through multiple plate-shaped filter elements, and cause the oil to hang on each layer of plate-shaped filter elements. After the oil accumulates, it returns to the oil tank through the first through hole.

[0015] Furthermore, when the plate-shaped filter element becomes clogged, oil and gas automatically enter the upper cavity of the plug from the clearance groove, pass through the annular filter element, and the oil accumulates on the annular filter element before returning to the oil tank through the first through hole.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model's breather cap effectively prevents oil spraying through its cylindrical filter element and extended sleeve structure design. When oil splashes inside the gearbox, the circular cover at the bottom of the cylindrical filter element prevents the oil from directly entering the connector from the bottom. Instead, it allows the oil to enter the cylindrical filter element through the interlayer space between the extended sleeve and the cylindrical filter element, preventing splashed oil from escaping from the breather cap and greatly reducing oil leakage. For oil mist (as an oil-gas mixture) generated by the rise in oil temperature, the oil mist enters the cylindrical filter element through the same interlayer space. Because the extended sleeve is long and far from the gearbox, some of the oil mist liquefies upon contact with the sleeve wall and flows back into the gearbox. The remaining oil mist is filtered and separated by the side wall of the cylindrical filter element and enters the connector, where it contacts the multi-layer plate filter element for oil-gas separation. This filter element blocks oil (oil molecules) but allows gas to pass through, thus separating gas and oil during the movement of oil mist towards the breather cap, preventing oil mist from being sprayed out, and avoiding pollution of the surrounding environment and waste of oil.

[0018] 2. When the layered filter element of this utility model becomes clogged, the gas after oil mist separation cannot be discharged from the second through hole. At this time, since there is an annular filter element below the plug and a clearance groove is formed between the upper outer surface of the plug and the upper enclosure, the oil and gas will automatically enter the upper cavity of the plug from the clearance groove and then be discharged from the exhaust hole. This avoids the generation of high pressure due to the inability to discharge gas in the oil tank, thus achieving the purpose of protecting the oil tank and avoiding pollution of the surrounding environment. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Connector; 2. Threaded part; 3. Cylindrical filter element; 4. Extension sleeve; 5. Circular cover; 6. Slot; 7. Circular plate; 8. External folding plate; 9. Internal folding plate; 10. Upper enclosure plate; 11. First through hole; 12. Plug; 13. Ring filter element; 14. Plate filter element; 15. Second through hole; 16. Clearance groove; 17. Cap; 18. Vent hole. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1 As shown, a breather cap with an oil-gas separation device includes a connector 1 connected to the outer port of a stainless steel pipe on a gearbox; a threaded portion 2 is provided on the lower circumferential surface of the connector 1; an extension sleeve 4 is connected to the threaded portion 2; an annular slot 6 is provided on the lower end face of the connector 1; a cylindrical filter element 3 is provided inside the extension sleeve 4 through the slot 6 to prevent oil from splashing upwards and to initially filter oil-gas; a circular cover 5 is connected to the bottom of the cylindrical filter element 3 to reduce the splashing ability of oil-gas, wherein the cylindrical filter element 3 is a stainless steel wire mesh layer.

[0024] A circular plate 7 is provided on the upper part of the connector 1; a cap 17 is provided on the top of the circular plate 7, and a cavity is formed between the cap 17 and the circular plate 7; an annular inner folding plate 9 is fixedly connected to the lower surface of the circular plate 7, and the circular plate 7 is connected to the upper part of the connector 1 by expansion or threading through the inner folding plate 9; an outer folding plate 8 is fixedly connected to the outer edge of the circular plate 7, and the circular plate 7 is connected to the cap 17 by expansion or threading through the outer folding plate 8.

[0025] A circular upper enclosure plate 10 is fixed to the upper surface of the circular plate 7; a plug 12 and an annular filter element 13 are arranged from top to bottom on the circular plate 7 corresponding to the position inside the upper enclosure plate 10, and the annular filter element 13 is a stainless steel wire mesh layer; multiple layers of plate-shaped filter elements 14 are arranged on the annular filter element 13, and the plate-shaped filter elements 14 are divided from top to bottom into a 100-mesh stainless steel filter screen, a cotton layer filter material, and a 100-mesh stainless steel filter screen.

[0026] The plug 12 has multiple second through holes 15; the circular plate 7 has a first through hole 11 corresponding to the position inside the upper enclosure 10, and multiple vent holes 18 corresponding to the position between the inner folding plate 9 and the outer folding plate 8; the outer surface of the upper enclosure 10 is recessed inward and forms a clearance groove 16 with the inner wall of the upper enclosure 10.

[0027] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of the breathing cap in actual practice will be described in detail below:

[0028] During installation, the cylindrical filter element 3 and the extension sleeve 4 are fitted into the slot 6 and installed on the connector 1, and then connected to the gearbox to achieve the connection between the breather cap and the gearbox.

[0029] In practical use, the high-speed rotation of gears and other components agitates the hydraulic transmission oil, causing it to swirl within the gearbox and splash towards the breather cap, resulting in oil leakage. Furthermore, as the oil temperature rises, the transmission oil evaporates, producing water vapor and other gases, leading to an increase in internal pressure. Due to the viscosity of the hydraulic transmission oil, some of it is carried out with the gases, forming oil mist, which also causes oil leakage. The following methods address both the splashed oil and the sprayed oil mist:

[0030] Splashed oil: When oil splashes, the circular baffle 5 at the bottom of the cylindrical filter element 3 prevents the oil from directly entering the connector 1 from the bottom. Instead, the oil enters the filter element through the interlayer space between the extended sleeve 4 and the cylindrical filter element 3. This effectively prevents oil from escaping from the breather cap and significantly reduces the problem of oil leakage from the breather cap.

[0031] The sprayed oil mist (oil-gas mixture): Oil mist is generated after the oil heats up. The oil mist enters the cylindrical filter element 3 from the interlayer space between the extension sleeve 4 and the cylindrical filter element 3. At this time, because the extension sleeve 4 has a long tube body, it is far away from the high temperature of the gearbox. Therefore, when the oil mist comes into contact with the tube wall of the extension sleeve, part of it will be liquefied due to the cold and flow back into the gearbox. The other part will be filtered and separated by the side wall of the cylindrical filter element 3 and enter the connector 1, contacting the multi-layer plate filter element 14. Because the plate filter element 14 is a multi-layer oil-gas separation filter element, it can separate the gas and oil in the oil mist during the process of the oil mist going to the outside of the breather cap. Since the plate filter element 14 only blocks oil molecules and allows gas to pass through, it prevents the breather cap from spraying oil mist.

[0032] Secondly, when the layered filter element 14 becomes clogged, the gas after oil mist separation cannot be discharged from the second through hole 15. At this time, since the annular filter element 13 is provided below the plug 12, and the upper outer surface of the plug 12 and the upper enclosure 10 form a clearance groove 16, the oil and gas will automatically enter the upper cavity of the plug 12 from the clearance groove 16 and then be discharged from the exhaust hole 18. This avoids the generation of high pressure due to the inability to discharge gas in the oil tank, thus achieving the purpose of protecting the oil tank and avoiding pollution of the surrounding environment.

[0033] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A breathing cap with an oil-gas separation device, characterized in that: Includes a connector (1); a circular plate (7) is provided on the upper part of the connector (1); a cap (17) is provided on the top of the circular plate (7), and a cavity is formed between the cap (17) and the circular plate (7); an annular internal folding plate (9) is fixedly connected to the lower surface of the circular plate (7); an external folding plate (8) is fixedly connected to the outer edge of the circular plate (7). A circular upper enclosure plate (10) is fixed to the upper surface of the circular plate (7); a plug (12) is provided on the circular plate (7) corresponding to the position inside the upper enclosure plate (10); a multi-layer plate-shaped filter element (14) is provided below the plug (12). The plug (12) has multiple second through holes (15); the circular plate (7) has a first through hole (11) corresponding to the position inside the upper enclosure (10), and multiple vent holes (18) corresponding to the position between the inner folding plate (9) and the outer folding plate (8).

2. A breathing cap with an oil-gas separation device according to claim 1, characterized in that: The circular plate (7) is also provided with an annular filter element (13) corresponding to the position inside the upper enclosure (10); the outer surface of the upper enclosure (10) is recessed to the inner side and forms an avoidance groove (16) with the inner wall of the upper enclosure (10).

3. A breathing cap with an oil-gas separation device according to claim 2, characterized in that: The annular filter element (13) is located below the plug (12); the plate filter element (14) is disposed on the annular filter element (13).

4. A breathing cap with an oil-gas separation device according to claim 1, characterized in that: The lower circumferential surface of the connector (1) is provided with a threaded part (2); an extension sleeve (4) is connected to the threaded part (2).

5. A breathing cap with an oil-gas separation device according to claim 4, characterized in that: The lower end face of the connector (1) is provided with an annular slot (6); a cylindrical filter element (3) is provided inside the extension sleeve (4) through the slot (6).

6. A breathing cap with an oil-gas separation device according to claim 5, characterized in that: The bottom of the cylindrical filter element (3) is connected to a circular cover (5).

7. A breathing cap with an oil-gas separation device according to claim 1, characterized in that: The circular plate (7) is connected to the upper part of the joint (1) by an inner folding plate (9); the circular plate (7) is connected to the cap (17) by an outer folding plate (8).

8. A breathing cap with an oil-gas separation device according to claim 1, characterized in that: Oil and gas enter the interior of the connector (1), enter the cavity formed by the cap (17) and the round plate (7) through the first through hole (11), pass through multiple plate-shaped filter elements (14), so that the oil hangs on each layer of plate-shaped filter elements (14), and after the oil accumulates, it returns to the interior of the oil tank through the first through hole (11).

9. A breathing cap with an oil-gas separation device according to claim 1, characterized in that: When the plate filter element (14) is blocked, oil and gas automatically enter the upper cavity of the plug (12) from the clearance groove (16), pass through the annular filter element (13), and the oil accumulates on the annular filter element (13) and returns to the oil tank through the first through hole (11).

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