dual-path ventilation system for gearbox
By designing a dual-path ventilation device for the gearbox, and using an air dryer and an oil-gas separator to handle the intake and exhaust of the gearbox, the problem of moisture and dust entering is solved, the service life of the oil and gearbox is extended, and maintenance and environmental pollution costs are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU SHIMO INTELLEGENT EQUIP CO LTD
- Filing Date
- 2025-09-29
- Publication Date
- 2026-07-03
AI Technical Summary
The oil tank of the existing gearbox is prone to moisture and dust entering during the intake and exhaust processes, which leads to increased oil impurities, rapid oil aging, reduced unit efficiency and lifespan, and the oil-gas mixture pollutes the environment during exhaust.
Design a dual-path ventilation device for a gearbox, including an intake pipe and an exhaust pipe. An air dryer and an automatic drain air filter are installed on the intake pipe, and an automatic oil-gas separator and a muffler are installed on the exhaust pipe. The device is connected to the oil tank mounting pipe through a tee connector to achieve bidirectional gas treatment.
It effectively reduces the entry of moisture and dust into the gearbox, extends the life of oil and gearbox, reduces the frequency of lubricant replenishment, lowers maintenance costs, and reduces environmental pollution and waste oil disposal costs.
Smart Images

Figure CN224453618U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to gear drive technology, and in particular to gearbox ventilation, specifically a dual-path ventilation device for gearboxes. Background Technology
[0002] The fuel tank ventilation system is an indispensable part of the fuel tank system. Its main function is to maintain the air pressure balance inside and outside the fuel tank and effectively prevent moisture and impurities from entering the fuel tank, thereby ensuring fuel quality and stable system operation. In the operating environment of wind turbine generators, land-based air contains more dust, while sea-based air contains more moisture.
[0003] When a generator set is operating, the fuel tank frequently needs to draw in and expel air as the gears rotate. During intake, moisture and small dust particles in the air can easily enter the fuel tank with the airflow. During exhaust, the air inside the gearbox, containing a large amount of fuel vapor, is also expelled into the air.
[0004] Currently, generator set gearboxes only have an oil tank cover or are equipped with a breather valve, providing basic ventilation. In some cases, the gearbox draws in air, allowing dust and moisture to enter, resulting in increased oil impurities and moisture content, rapid aging and deterioration, and reduced unit efficiency and service life. During exhaust, the oil and gas mixture is discharged into the contaminated compartment.
[0005] Therefore, it is necessary to provide a dual-path ventilation device for gearboxes to solve the above problems. Utility Model Content
[0006] The purpose of this invention is to provide a dual-path ventilation device for gearboxes.
[0007] The technical solution is as follows:
[0008] A dual-path ventilation device for a gearbox is connected to the oil tank mounting pipe of the gearbox, and the oil tank mounting pipe is provided with an intake pipe and an exhaust pipe.
[0009] The intake pipeline includes an intake section pipe, which is equipped with an intake one-way valve and an intake section air treatment module, which is an air dryer and / or an automatic drain air filter.
[0010] The exhaust pipeline includes an exhaust section pipe, which is equipped with an exhaust section check valve and an automatic oil-gas separator.
[0011] Furthermore, the fuel tank mounting pipe is connected to one of the ports of the tee connector, while the intake and exhaust pipes are connected to the remaining two ports of the tee connector.
[0012] Furthermore, a muffler is installed at the outlet of the exhaust pipe.
[0013] Furthermore, the automatic oil-gas separator is equipped with a waste oil tray.
[0014] Furthermore, the automatic drainage air filter is equipped with a water collection tray.
[0015] Furthermore, the fuel tank mounting pipe is connected to the mounting joint installed on the gearbox.
[0016] Compared with existing technologies, this invention effectively reduces the entry of moisture and dust into the gearbox, slows down the oxidation, emulsification and deterioration of gear oil, thereby extending the life of the oil and gearbox, reducing the amount and frequency of lubricant replenishment, thus saving the cost of gearbox maintenance and lubricant replacement; it also reduces the entry of gearbox oil vapor into the air, thus reducing environmental pollution; and it reduces the generation of waste oil, lowering the cost of waste oil treatment and reducing the risk of waste oil pollution to the environment. Attached Figure Description
[0017] Figure 1 This is a schematic diagram illustrating the principle of this utility model.
[0018] Figure 2 This is a schematic diagram of the exhaust gas path.
[0019] Figure 3 This is a schematic diagram of the intake airway.
[0020] Figure 4 This is a schematic diagram illustrating the application of this utility model in a humid environment.
[0021] Figure 5 This is a schematic diagram illustrating the application of this utility model in a dusty environment. Detailed Implementation
[0022] Example: Please refer to Figure 1-3 This embodiment demonstrates a dual-path ventilation device for a gearbox, which is connected to an oil tank mounting pipe 12 of the gearbox 10. The oil tank mounting pipe 12 is provided with an intake pipe and an exhaust pipe.
[0023] The intake pipeline includes an intake section pipe, which is equipped with an intake one-way valve 5, and an intake section air treatment module is also installed on the intake section pipe. The intake section air treatment module consists of an air dryer 6 and an automatic drain air filter 7.
[0024] The exhaust pipeline includes an exhaust section pipe, which is equipped with an exhaust section check valve 3 and an automatic oil-gas separator 2.
[0025] The fuel tank mounting pipe 12 is connected to one of the ports of the tee connector 4, and the intake pipe and exhaust pipe are connected to the remaining two ports of the tee connector.
[0026] A muffler 1 is also installed at the outlet of the exhaust pipe.
[0027] The automatic oil-gas separator 2 is equipped with a waste oil tray 11.
[0028] The automatic drainage air filter 6 is equipped with a water collection tray 8.
[0029] The oil tank mounting pipe 12 is connected to the mounting joint 10 provided on the gearbox 9.
[0030] See Figure 4 , 5 In specific applications, one of the air dryer 6 and the automatic drainage air filter 7 can be used as the air handling module of the intake section.
[0031] Compared with existing technologies, this invention effectively reduces the entry of moisture and dust into the gearbox, slows down the oxidation, emulsification and deterioration of gear oil, thereby extending the life of the oil and gearbox, reducing the amount and frequency of lubricant replenishment, thus saving the cost of gearbox maintenance and lubricant replacement; it also reduces the entry of gearbox oil vapor into the air, thus reducing environmental pollution; and it reduces the generation of waste oil, lowering the cost of waste oil treatment and reducing the risk of waste oil pollution to the environment.
[0032] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.
Claims
1. A gearbox two-way breather device characterized by: An oil tank mounting pipe is connected to the gearbox, and an intake pipe and an exhaust pipe are provided on the oil tank mounting pipe; The intake pipeline includes an intake section pipe, which is equipped with an intake one-way valve and an intake section air treatment module, which is an air dryer and / or an automatic drain air filter. The exhaust pipeline includes an exhaust section pipe, which is equipped with an exhaust section check valve and an automatic oil-gas separator.
2. The dual-path ventilation device for a gearbox according to claim 1, characterized in that: The fuel tank mounting pipe is connected to one of the ports of the tee connector, while the intake and exhaust pipes are connected to the remaining two ports of the tee connector.
3. A dual ventilation device for a gear case as claimed in claim 1, wherein: A muffler is also installed at the outlet of the exhaust pipe.
4. A dual ventilation device for a gear case as claimed in claim 1, wherein: The automatic oil-gas separator is equipped with a waste oil tray.
5. A dual ventilation device for a gear case as claimed in claim 1, wherein: Automatic drainage air filters are equipped with a water collection tray.
6. A dual ventilation device for a gear box according to any one of claims 1-5, characterized in that: The fuel tank mounting pipe connects to the mounting joint installed on the gearbox.