A retarder breather valve

Abstract

The utility model relates to a kind of breather valve of speed reducer, comprising: first sealing ring, second sealing ring, center tube integrated upper cover, end cap, filter layer;The center tube integrated upper cover is connected with end cap;The filter layer is set in the side of center tube integrated upper cover, and is clamped in the middle of center tube integrated upper cover and end cap;First sealing ring, second sealing ring are respectively set in annular groove on end cap.The breather valve of speed reducer has the following advantages: using plastic material, high strength, can be die formed, mass production cost is low, maintenance is convenient;Radial double O type sealing ring structure, replace complex end face seal, reduce cost and increase efficiency;Conical tunnel pre-separation design, change airflow direction and disperse airflow, pre-separate oil gas, reduce filter element oil content, prolong the service life of glass fiber filter element, improve market competitiveness.

Description

Technical Field

[0001] This application belongs to the technical field of speed reducer accessories and relates to a speed reducer breather valve. Background Technology

[0002] A speed reducer is a mechanical device that reduces speed and increases torque through transmission components such as gears and worm gears. It is widely used in power transmission scenarios that require "speed reduction and torque increase". The speed reducer breather valve, also known as a breather plug, breather valve, or balancer, is a key component in industrial transmission systems. It is mainly used to balance the air pressure inside and outside the speed reducer, prevent contaminants from entering, and avoid internal oil leakage.

[0003] Traditional mechanical breathing filters use porous materials, such as sintered metals, ceramics, or fibers, as the filter medium. They rely on physical pores to achieve gas exchange while blocking particulate matter. They are simple in structure and low in cost, suitable for general industrial environments, such as those with low dust levels and stable temperature and humidity. Patent CN203239890U provides a basic structural type of breather plug with a sealed bottom and symmetrical elongated or radial perforations on the sides to prevent oil accumulation. Combined with a protective cap and filter assembly, it uses a perforated plate and baffle plate to prevent oil splashing.

[0004] Patents CN211910169U, CN217558954U, and CN202113701U provide filter-enhanced breathable plugs with built-in multi-layer filter components, such as sintered copper filter blocks, micro-perforated plates, and filter screens + adsorption layers; some designs adopt graded filtration, such as micro-perforated plates with gradually smaller pore sizes along the airflow direction.

[0005] Patents CN104964075A and CN221196011U provide a bidirectional ventilated and pressure-balanced vent plug with a dual-valve core design. It achieves bidirectional ventilation via spring drive: exhausting air under positive pressure and drawing in air under negative pressure. It features independent ventilation channels, such as a first cylindrical hole connected to a second / third cylindrical hole via a connecting hole, allowing for separate control of internal and external airflow.

[0006] Patents CN215806203U and CN222416258U provide automated and anti-clogging vent plugs that integrate dynamic structures such as fans and linkage components. For example, the fan rotates with the airflow to cool and liquefy oil vapor; the slider-connecting column structure allows for adjustment of the connection diameter to adapt to different installation requirements; some designs have self-cleaning functions, such as the combination of vent grooves and vent holes, which facilitates the removal of blockages.

[0007] However, filter cartridges have limited filtration accuracy (typically ≥5μm), are prone to clogging, require frequent maintenance, and cannot effectively block water vapor or oil mist. As industrial equipment develops towards high efficiency, long lifespan, and low maintenance, the technology of breathing filter cartridges is also constantly being upgraded. Utility Model Content

[0008] In view of the shortcomings of the prior art, the purpose of this application is to provide a speed reducer breathing valve.

[0009] Based on the above objectives, this application provides the following technical solution:

[0010] One of the technical solutions of this application provides a speed reducer breather valve, including: a first sealing ring, a second sealing ring, a central tube integrated top cover, an end cover, and a filter layer;

[0011] The central tube integrated top cover is snapped into the end cover; the filter layer is disposed on the side of the central tube integrated top cover and is snapped between the central tube integrated top cover and the end cover; the first sealing ring and the second sealing ring are respectively disposed in the annular groove opened on the end cover; the end cover is provided with an air inlet end, the side wall of the central tube integrated top cover is an open structure (i.e., it is provided with a hollow), and the side wall of the central tube integrated top cover is an air outlet end.

[0012] Furthermore, the interior of the central tube integrated cover is a ventilation chamber, which is located above the conical tunnel.

[0013] In some specific embodiments, the ventilation cavity may be filled with a filler, such as steel wool, etc. In other embodiments, the cavity may be left empty without any filler, which does not affect the inventiveness of this invention.

[0014] Furthermore, the air inlet end of the end cap is a conical tunnel; the lower part of the outer side of the end cap is provided with a first annular groove, and a first sealing ring is provided in the first annular groove; the upper part of the outer side of the end cap is provided with a protrusion, the side of the protrusion is provided with a second annular groove, a second sealing ring is provided in the second annular groove, and a first slot is provided on the top of the protrusion.

[0015] Furthermore, the central tube integrated cover is a cylindrical structure with an open bottom. The lower side of the central tube integrated cover is inserted into the first slot, and the central tube integrated cover is engaged with the end cover through a snap-on-slot engagement. The upper edge of the central tube integrated cover has a second slot with its opening facing downwards, and the second slot is opposite to the first slot, with a width and diameter that are approximately equal.

[0016] Furthermore, a filter layer is provided between the second slot and the first slot; the filter layer serves as a filter element, and the material of the filter element is preferably glass fiber; the glass fiber of the filter layer is wound around the outer diameter of the central tube integrated cover, or is fitted as an integrally formed annular structure on the outside of the central tube integrated cover.

[0017] Furthermore, the reducer's breather valve is connected to the reducer by pressing together the first and second O-rings, with the first and second O-rings pressing against the wall surface of the reducer to form a connection and seal.

[0018] Furthermore, the material of the central tube integrating the top cover and the end cover is a rigid plastic material, preferably nylon + glass fiber; the material of the first sealing ring and the second sealing ring is fluororubber.

[0019] Furthermore, the opening structure on the side wall of the central tube integrated cover is square, circular, or a combination of both.

[0020] Furthermore, the working principle of the reducer's breather valve is as follows:

[0021] The oil-gas mixture enters the filter element from the bottom inlet. It undergoes pre-separation through a conical tunnel. Any remaining unseparated oil-gas mixture is carried into the filter element by the airflow. Unseparated oil continues to impact the glass fibers on the inner mesh of the filter element, where small oil droplets coalesce into larger droplets due to polymerization and flow downwards under gravity. Clean gas then passes through the filter layer and exits from the outlet.

[0022] Furthermore, the application of the aforementioned reducer breather valve is not limited to balancing the internal and external air pressure of the reducer, preventing external contaminants from entering the interior, while allowing internal air to freely enter and exit, avoiding pressure buildup due to temperature changes or oil fluctuations.

[0023] Compared with the prior art, the present invention has at least the following improvements and beneficial effects:

[0024] 1) The central tube of the reducer breather valve provided by this utility model integrates the top cover and end cover made of plastic material. It is a low-cost, easy-to-maintain filtration system with high strength. It can be molded by plastic molds, making it suitable for mass production. Its low price enhances its competitiveness in the market. The first and second sealing rings are made of fluororubber. Fluororubber has advantages such as resistance to extreme temperatures, strong chemical corrosion, weather resistance, high mechanical strength, good electrical insulation, and vacuum resistance, and can maintain stable performance in various harsh environments.

[0025] 2) The reducer breather valve provided by this utility model has a radial double sealing structure design and adopts a radial two-point O-ring sealing ring design scheme, which replaces the problem of complex end face sealing structure and high manufacturing cost, thereby reducing costs and enhancing market competitiveness.

[0026] 3) The reducer breather valve provided by this utility model has a conical tunnel pre-separation structure design. This design structure can change the airflow direction and disperse the airflow, so that the oil-gas mixture that just enters the filter element is pre-separated, thereby reducing the oil content of the gas entering the internal cavity of the filter element. This principle extends the service life of the filter element itself which is filtered by glass fiber. Attached Figure Description

[0027] Figure 1 The front view of the speed reducer breather valve provided by this utility model:

[0028] Figure 2 A cross-sectional view of the speed reducer breather valve provided by this utility model:

[0029] Figure label:

[0030] 1. First sealing ring;

[0031] 2. Second sealing ring;

[0032] 3. Central tube integrated top cover; 3-1 Second slot;

[0033] 4. End cap; 4-1 protrusion, 4-2 conical tunnel, 4-3 first annular groove, 4-4 second annular groove, 4-5 first slot;

[0034] 5. Filter layer. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to specific embodiments. It should be noted that the following embodiments will help those skilled in the art to further understand this utility model, but do not limit this utility model in any way. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model. These all fall within the protection scope of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Example 1

[0038] A speed reducer breather valve

[0039] This embodiment provides a speed reducer breather valve, including: a first sealing ring 1, a second sealing ring 2, a central tube integrated upper cover 3, an end cap 4, and a filter layer 5, combined with... Figure 1 and Figure 2 Its structure and connection relationships are as follows:

[0040] The lower end of the end cap 4 is designed as an air intake, with a conical tunnel 4-2 inside. The lower part of the outer side of the end cap 4 has a first annular groove 4-3, and the upper part has a protrusion 4-1. The side of the protrusion 4-1 has a second annular groove 4-4, and the upper part has a first retaining groove 4-5. The end cap 4 is made of hard plastic.

[0041] The central tube integrated cover 3 is a cylindrical structure with an open bottom. The lower side is inserted into the first slot 4-5 and engages with the end cover 4. The upper edge has a second slot 3-1 with the opening facing downwards. The side wall of the central tube integrated cover 3 is hollowed out and is made of rigid plastic.

[0042] The filter layer 5 is disposed between the second slot 3-1 and the first slot 4-5 for oil-gas separation.

[0043] The first sealing ring 1 and the second sealing ring 2 are respectively installed in the first annular groove 4-3 and the second annular groove 4-4, and are made of fluororubber to form a radial double sealing structure.

[0044] The central tube integrated cover 3 is snapped into the end cover 4 by a snap-and-slot engagement, and the filter layer 5 is clamped between the two; the end cover 4 is connected by the first sealing ring (1) and the second sealing ring (2) of the O-ring, and the first sealing ring (1) and the second sealing ring (2) are pressed into contact with the wall surface on the reducer to form a connection and sealing state.

[0045] Working process and sealing principle:

[0046] (1) Oil-gas separation process:

[0047] The oil-gas mixture enters from the bottom inlet of end cap 4, first passing through the conical tunnel 4-2, where the airflow direction changes and disperses, achieving pre-separation. Some oil droplets impact the tunnel wall due to inertia and flow back. The unseparated oil-gas mixture enters the ventilation chamber, impacting the glass fiber filter layer 5. Small oil droplets coalesce into larger droplets on the glass fiber surface and flow downwards into the reducer under gravity. Clean gas passes through the perforated / opening section on the side wall of the central tube integrated cover 3, and is filtered through the filter layer 5 before being discharged.

[0048] (2) Sealing mechanism:

[0049] During the compression connection, the first sealing ring 1 and the second sealing ring 2 are deformed under pressure, tightly adhering to the reducer wall to prevent external contaminants from entering and to prevent internal oil leakage.

[0050] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A speed reducer breather valve, characterized in that, include: First sealing ring (1), second sealing ring (2), central tube integrated top cover (3), end cover (4) and filter layer (5); The central tube is integrated with the upper cover (3) and the end cover (4) and snapped together; The filter layer (5) is disposed on the side of the central tube integrated cover (3) and is sandwiched between the central tube integrated cover (3) and the end cap (4); The first sealing ring (1) and the second sealing ring (2) are respectively set in the annular groove opened on the end cap (4); The end cap (4) is provided with an air inlet, the side wall of the central tube integrated cover (3) is an open structure, and the side walls of the central tube integrated cover (3) are all air outlets.

2. A speed reducer breather valve according to claim 1, characterized in that, The air inlet of the end cap (4) is a conical tunnel (4-2), and the interior of the central tube integrated cover (3) is a ventilation chamber located above the conical tunnel (4-2).

3. A speed reducer breather valve according to claim 1, characterized in that, The lower part of the outer side of the end cap (4) is provided with a first annular groove (4-3); the upper part of the outer side of the end cap (4) is provided with a protrusion (4-1), the side of the protrusion (4-1) is provided with a second annular groove (4-4), and the upper part of the protrusion (4-1) is provided with a first slot (4-5).

4. A speed reducer breather valve according to claim 3, characterized in that, A first sealing ring (1) is provided in the first annular groove (4-3), and a second sealing ring (2) is provided in the second annular groove (4-4).

5. A speed reducer breather valve according to claim 3, characterized in that, The central tube integrated cover (3) is a cylindrical structure with an open bottom. The lower side of the central tube integrated cover (3) is inserted into the first slot (4-5). Through the buckle-slot cooperation, the central tube integrated cover (3) is engaged with the end cover (4).

6. A speed reducer breather valve according to claim 3, characterized in that, The upper edge of the central tube integrated cover (3) is provided with a second slot (3-1) with the opening facing downward. The second slot (3-1) is open opposite to the first slot (4-5), and the width and diameter are similar.

7. A speed reducer breather valve according to claim 6, characterized in that, A filter layer (5) is provided between the second slot (3-1) and the first slot (4-5). The filter layer (5) serves as a filter element and is made of glass fiber.

8. A speed reducer breather valve according to claim 1, characterized in that, The connection between the reducer's breather valve and the reducer is as follows: the first sealing ring (1) and the second sealing ring (2) of the O-ring are squeezed together, and the first sealing ring (1) and the second sealing ring (2) are squeezed and contacted with the wall surface on the reducer to form a connection and sealing state.

9. A speed reducer breather valve according to claim 1, characterized in that, The material of the central tube integrated top cover (3) and end cover (4) is hard plastic.

10. A speed reducer breather valve according to claim 1, characterized in that, The first sealing ring (1) and the second sealing ring (2) are made of fluororubber.

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