Gearbox oil spill prevention ventilation device and gearbox

Abstract

The utility model provides a gear box oil spill prevention ventilation device and a gear box, and relates to the technical field of gear box oil spill prevention, the gear box oil spill prevention ventilation device comprises a ventilation pipe assembly, a ventilation cap and a damping adsorption piece, the ventilation pipe assembly comprises a ventilation pipe and a plurality of damping bodies, the ventilation pipe is used for being connected with the gear box, and the damping bodies are arranged in the ventilation pipe to form a zigzag ventilation channel; airflow carrying oil mist in the gearbox sequentially passes through the ventilation channel and the damping adsorption part, the flow speed can be reduced and the condensation backflow effect can be improved when the airflow passes through the ventilation channel, the flow speed of the airflow can be further reduced when the airflow passes through the damping adsorption part, the oil mist in the airflow is further adsorbed, and finally the airflow is exhausted through the ventilation cap. From the two aspects of reducing the airflow speed and enhancing oil backflow, the situation of oil overflow leakage of the gear box is reduced on the premise that the normal ventilation function is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-oil spill of gearboxes, in particular to an anti-oil spill ventilation device for a gearbox and a gearbox. Background Art

[0002] A gearbox is a common component in the power transmission process. During the high-speed operation of the internal gears, the temperature of the gearbox and its internal oil will rise. At the same time, the internal lubricating oil will also be stirred up by the rotating gears and atomized. The air temperature inside the gearbox rises, the volume expands, and the atomized oil and gas are quickly discharged from the ventilation plug. The oil and gas gradually cool during the discharge process, re-condense into small oil droplets, adhere to the inner wall of the ventilation plug and the outlet, and a large number of small oil droplets converge to form oil droplets that slide off, causing oil leakage in the gearbox. In view of the above defects, this application is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to provide an anti-oil spill ventilation device for a gearbox and a gearbox, which reduces the problem of oil leakage in the gearbox on the premise of ensuring the normal ventilation function.

[0004] To solve the above problems, the utility model provides an anti-oil spill ventilation device for a gearbox, which includes a ventilation pipe assembly, a ventilation cap and a damping attachment. The ventilation pipe assembly includes a ventilation pipe and a number of damping bodies. The ventilation pipe is used to connect with the gearbox. The damping bodies are arranged in the ventilation pipe to form a tortuous ventilation channel in the ventilation pipe. The airflow carrying oil mist in the gearbox passes through the ventilation channel and the damping attachment in sequence. When passing through the ventilation channel, the flow rate will be reduced, and the condensation and reflux effect will be improved. When the airflow passes through the damping attachment, the flow rate of the airflow will be further slowed down, and the oil mist in the airflow will be further adsorbed. Finally, the airflow is discharged through the ventilation cap.

[0005] According to an embodiment of the utility model, the damping body is in a sheet shape, arranged alternately and inclinedly installed on the inner wall of the ventilation pipe.

[0006] According to an embodiment of the utility model, the inclination angle of the damping body is 30° to 60°, preferably 45°.

[0007] According to an embodiment of the utility model, the number of the damping bodies is not less than 5 pieces.

[0008] According to an embodiment of the utility model, the projected area of the damping body occupies 60% to 90% of the cross-sectional area of the inner diameter of the ventilation pipe, preferably 80%.

[0009] According to an embodiment of the utility model, the damping attachment adopts damping cotton.

[0010] According to an embodiment of the utility model, the damping attachment is arranged in the ventilation pipe and is arranged close to the outlet end of the ventilation pipe.

[0011] According to an embodiment of the present utility model, the ventilation pipe and the ventilation cap are threadedly connected.

[0012] According to an embodiment of the present utility model, the end of the ventilation pipe connected to the gearbox is provided with a thread.

[0013] A gearbox includes the above-mentioned anti-overflow oil ventilation device for the gearbox.

[0014] The beneficial effect of the present utility model is that by arranging a damping body in the ventilation pipe, a tortuous ventilation channel is formed under the action of the damping body. After the air flow with oil mist enters the ventilation pipe, each damping piece in the pipe reduces the air flow speed to increase the residence time of the oil mist in the ventilation pipe assembly. As the flow speed and the external temperature decrease, the oil mist re-condenses into oil droplets, adheres to the damping body, and returns to the gearbox along the damping body and the pipe wall after the oil droplets increase. At the same time, damping cotton is installed at the outlet end of the ventilation pipe assembly to slow down the flow speed of the expanding air flow and further adsorb the oil mist in the air flow; the oil and gas after multiple adsorptions are finally discharged through the ventilation plug, so as to reduce the air flow speed and strengthen the oil liquid return. On the premise of ensuring the normal ventilation function, the situation of oil leakage from the gearbox is reduced. Description of the Drawings

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 It is a schematic structural diagram of the anti-overflow oil ventilation device for the gearbox installed on the gearbox;

[0017] Figure 2 It is a schematic overall structural diagram of the anti-overflow oil ventilation device for the gearbox;

[0018] Figure 3 It is a schematic structural diagram of the ventilation pipe assembly;

[0019] Figure 4 It is a schematic structural diagram of the ventilation cap. Detailed Embodiments

[0020] The following description is only used to disclose the present utility model so that those skilled in the art can implement the present utility model. The embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other schemes that do not depart from the spirit and scope of the present utility model.

[0021]

Embodiment 1

[0022] An anti-overflow oil ventilation device for a gearbox, as Figures 2 - 4, including a vent pipe 12 assembly, a vent cap 11, and a damping and adsorption component 14. The vent pipe assembly 12 includes a vent pipe 15 and a number of damping bodies 13. In this embodiment, the damping body 13 is in the form of a sheet, using the form of a damping sheet. In other embodiments, it can also be in a block shape, or the damping body can be integrally formed on the inner wall of the vent pipe 15 directly.

[0023] One end of the vent pipe 15 is used to connect to the gearbox. A thread is provided at the end of the vent pipe 15 connected to the gearbox, and it is screwed onto the gearbox through the thread. It can also be connected by means such as clamping, welding, or bonding. The other end of the vent pipe 15 is used to connect to the vent cap 11, and the connection method can also be a threaded connection, welding, bonding, or clamping method.

[0024] Such as Figure 2 , Figure 3 , the damping body 13 is arranged in the vent pipe 15. The setting quantity is set according to parameters such as the length of the vent pipe 15. In this embodiment, it is preferably not less than 5 pieces, arranged staggeredly and installed obliquely on the inner wall of the vent pipe 15. In the vertical direction, the connecting end of each damping body 13 is higher than the open end, and the inclination angle A is 30° to 60°, preferably 45°. The open ends of two adjacent damping bodies are staggered from each other. At the same time, the projected area of the damping body 13 occupies 60% to 90% of the cross-sectional area of the inner diameter of the vent pipe, preferably 80%, so as to increase the length of the ventilation channel and the contact area between the airflow and the damping body 13. The damping and adsorption component 14 is arranged in the vent pipe 15 and is arranged near the outlet end of the vent pipe 15. In this embodiment, the damping and adsorption component 14 uses damping cotton, and the damping cotton is installed at the position of the vent pipe near the air outlet after being infiltrated by the oil liquid. The damping and adsorption component 14 can also be in the form of multiple layers of filter screens, metal meshes, etc.

[0025] During operation, the air in the gearbox 1 will heat up and expand, and the expanded hot air will carry the oil mist into the air inlet of the vent pipe. Each damping sheet in the pipe will reduce the airflow velocity to increase the residence time of the oil mist in the vent pipe assembly. As the flow velocity and the external temperature decrease, the oil mist will re-condense into oil droplets, attach to the damping sheet, and return to the gearbox along the damping sheet and the pipe wall after the oil droplets increase. The damping cotton is installed at the outlet end of the vent pipe assembly after being infiltrated by the oil liquid to slow down the flow velocity of the expanded airflow and further adsorb the oil mist in the airflow; the oil and gas that have been adsorbed multiple times are finally discharged through the vent plug, starting from two aspects of reducing the airflow velocity and strengthening the oil liquid return, and reducing the situation of gearbox oil leakage on the premise of ensuring the normal ventilation function.

[0026] A gearbox, such as Figure 1 , includes the above-mentioned gearbox anti-oil-leakage ventilation device 1, and the gearbox anti-oil-leakage ventilation device 1 is installed at the ventilation port of the gearbox 2.

[0027] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may have any deformation and modification without departing from the said principle.

Claims

1. An oil spill prevention and ventilation device for a gearbox, characterized in that: It includes a vent pipe assembly (12), a vent cap (11) and a damping and adsorption accessory (14). The vent pipe assembly (12) includes a vent pipe (15) and a number of damping bodies (13). The vent pipe (15) is used to connect with the gearbox. The damping bodies (13) are arranged in the vent pipe (15) to form a zigzag vent passage. The airflow carrying oil mist in the gearbox sequentially passes through the vent passage and the damping and adsorption accessory (14). When passing through the vent passage, the flow rate will be reduced and the condensation and reflux effect will be improved. When the airflow passes through the damping and adsorption accessory (14), the flow rate of the airflow will be further slowed down and the oil mist in the airflow will be further adsorbed. Finally, the airflow is discharged through the vent cap (11). The damping body (13) is sheet-shaped, arranged in a staggered manner and installed obliquely on the inner wall of the vent pipe (15). The projected area of the damping body (13) occupies 60% - 90% of the cross-sectional area of the inner diameter of the vent pipe.

2. The gearbox anti-oil-spill ventilation device according to claim 1, characterized in that: The inclination angle of the damping body (13) is 30° - 60°.

3. The gearbox anti-oil-spill ventilation device according to claim 1, characterized in that: The number of the damping bodies (13) provided is not less than 5 pieces.

4. The gearbox anti-oil-spill ventilation device according to claim 1, characterized in that: The damping and adsorption accessory (14) is made of damping cotton.

5. The gearbox anti-oil-spill ventilation device according to claim 4, characterized in that: The damping and adsorption accessory (14) is arranged in the vent pipe (15) and is arranged near the outlet end of the vent pipe (15).

6. The gearbox anti-oil-spill ventilation device according to claim 1, characterized in that: The vent pipe (15) and the vent cap (11) are in threaded connection.

7. The gearbox anti-oil-spill ventilation device according to claim 1, wherein: One end of the vent pipe (15) connected to the gearbox is provided with a thread.

8. A gearbox, characterized in that: It includes the gearbox anti-oil-spill vent device according to any one of claims 1 - 7.

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