Gear box oil leakage prevention ventilation device

Abstract

The utility model relates to mechanical engineering technical field discloses a gear box anti -infiltration oil's aerator, including transmission case, the top right side fixed connection of transmission case has the condensation cylinder, the inner wall of condensation cylinder is provided with oil gas separation mechanism, the top fixed connection of condensation cylinder has the protective tube, the inner wall of protective tube is provided with dustproof mechanism, the top rotatory connection of transmission case has the overhaul cover, the inner wall of condensation cylinder is provided with fixed mechanism, the bottom of condensation cylinder is provided with anti -infiltration mechanism, the oil gas separation mechanism includes two protective plates, in the utility model, through the protective plate fixed spiral gas pipe, and the oil gas rotation is guided by the guide vane, and the oil mist condensation is through centrifugal force, and the outer wall fin and water cooling accelerate liquefaction, the bottom vortex generator promotes liquefaction efficiency, finally through the top activated carbon adsorption residual oil mist, make the device can high -efficient purification oil gas.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, and in particular to a venting device for preventing oil leakage in a gearbox. Background Technology

[0002] A gearbox is a mechanical device used to transmit power and change speed. It achieves the conversion of speed and torque through the precise meshing of gear sets. However, during the operation of the gearbox, the temperature inside the gearbox rises, causing the air pressure to rise. If the pressure is not balanced in time, it will cause the seals to fail and cause oil leakage. To address this, people have developed a venting device to prevent oil leakage in gearboxes.

[0003] The venting device for preventing oil leakage in gearboxes is an important auxiliary component for ensuring the normal operation of gearboxes. It is used to balance the air pressure inside and outside the gearbox, preventing the seals from failing due to increased temperature and air pressure inside the gearbox, which could lead to oil leakage. In addition, it can effectively block the entry of external dust and moisture, reduce the pressure on the seals, and thus ensure the stable operation of the equipment.

[0004] In the venting device for preventing oil leakage in gearboxes, the oil-gas mixture generated by oil splashing during gearbox operation is discharged through the venting device. However, the traditional structure lacks an efficient oil-gas separation design, and a large amount of lubricating oil evaporates with the gas, which not only causes waste but also forms oil sludge accumulation near the vent, affecting the cleanliness of the equipment. The existing solution is to use a packing separator to condense and recover the oil mist in the discharged gas. However, when the porosity of the packing layer in the packing separator is too large, the oil mist separation efficiency will decrease, while when the porosity is too low, the ventilation flow rate will be significantly reduced, which cannot meet the ventilation requirements during high-speed operation. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a venting device for preventing oil leakage in gearboxes, aiming to improve the problem of difficulty in controlling the porosity of the packing layer in the existing packing separator.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a venting device for preventing oil leakage in a gearbox, comprising a transmission box, a condenser cylinder fixedly connected to the top right side of the transmission box, an oil-gas separation mechanism provided on the inner wall of the condenser cylinder, a protective cylinder fixedly connected to the top of the condenser cylinder, a dustproof mechanism provided on the inner wall of the protective cylinder, a maintenance cover rotatably connected to the top of the transmission box, a fixing mechanism provided on the inner wall of the condenser cylinder, and an anti-backflow mechanism provided at the bottom of the condenser cylinder;

[0007] The oil-gas separation mechanism includes two protective plates. The outer walls of both protective plates are fixedly connected to the inner wall of the condenser cylinder. The same spiral gas delivery pipe is fixedly connected to adjacent sides of the two protective plates. Multiple guide vanes are fixedly connected to the inner wall of the spiral gas delivery pipe, and multiple heat dissipation fins are fixedly connected to the outer wall of the spiral gas delivery pipe. A vortex generator is fixedly connected to the bottom end of the bottom protective plate, and an adsorption net is fixedly connected to the top of the top protective plate. A water-cooling assembly is provided on the front side of the transmission box, and a recovery assembly is provided on the inner wall of the condenser cylinder.

[0008] As a further description of the above technical solution:

[0009] The dustproof mechanism includes a filter screen, the outer wall of which is fixedly connected to the top of the inner wall of the protective cylinder. Two fixing brackets are fixedly connected to the inner wall of the protective cylinder. The same limiting ring is fixedly connected to the adjacent side of the two fixing brackets. A rotating shaft is rotatably connected to the inner wall of the limiting ring. A limiting groove is formed in the middle of the outer wall of the rotating shaft. A spiral blade is fixedly connected to the bottom end of the rotating shaft. A cleaning brush is fixedly connected to the top end of the rotating shaft.

[0010] As a further description of the above technical solution:

[0011] The fixing mechanism includes an outer magnetic ring, the outer wall of which is fixedly connected to the top of the inner wall of the condenser cylinder, and an inner magnetic ring is fixedly connected to the bottom of the protective cylinder.

[0012] As a further description of the above technical solution:

[0013] The anti-backflow mechanism includes a funnel bottom plate, the top of which is fixedly connected to the bottom of the condenser cylinder, a rubber pad is fixedly connected to the inner wall of the funnel bottom plate, and a gravity ball is fixedly connected to the inner wall of the funnel bottom plate.

[0014] As a further description of the above technical solution:

[0015] The water-cooling assembly includes a water tank, the rear side of which is fixedly connected to the front side of the transmission box. A water pump is fixedly connected to the top of the water tank, and a water supply pipe is connected to the top of the water pump. A return pipe is connected to the top right side of the water tank.

[0016] As a further description of the above technical solution:

[0017] The recovery assembly includes two fixed rings, the outer walls of which are fixedly connected to the bottom of the inner wall of the condenser cylinder, and the same adsorption net is fixedly connected to the adjacent side of the two fixed rings.

[0018] As a further description of the above technical solution:

[0019] The top of the protective cylinder is fixedly connected to multiple connecting blocks, and the top of each of the multiple connecting blocks is fixedly connected to the same protective cover.

[0020] As a further description of the above technical solution:

[0021] A fixing block is fixedly connected to the top of the inspection cover, and a threaded groove is opened on the inner wall of the fixing block. A threaded sleeve is fixedly connected to the outer wall of the condenser cylinder.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the spiral gas delivery pipe is fixed inside the condenser cylinder by two protective plates. The guide vanes on the inner wall of the gas delivery pipe guide the oil and gas to rotate. Centrifugal force is used to throw the oil mist toward the pipe wall and extend the airflow path. The heat sink and water cooling components on the outer wall accelerate the liquefaction of the oil. The bottom vortex generator further improves the separation efficiency, and the activated carbon adsorption mesh at the top filters the residual oil mist, enhances the condensation effect, significantly reduces oil loss, and makes the oil and gas purification more efficient.

[0024] 2. In this utility model, the filter screen intercepts dust in the gas entering and exiting the protective cylinder to achieve preliminary purification. When the gearbox is ventilated or the external air flows, the airflow impacts the spiral blades to generate rotational force. The rotating shaft, under the constraint of the limiting structure, transmits the power to the top, driving the cleaning brush to rotate. The cleaning brush cleans the dust on the surface of the filter screen through mechanical friction, which not only ensures ventilation efficiency but also extends the service life of the filter screen and improves the overall reliability of the device. Attached Figure Description

[0025] Figure 1 This is a perspective view of a venting device for preventing oil leakage in a gearbox, as proposed in this utility model.

[0026] Figure 2 This is a front view of a venting device for preventing oil leakage in a gearbox, as proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the protective cover of the venting device for preventing oil leakage in a gearbox, as proposed in this utility model.

[0028] Figure 4 This is a split view of the protective plate of a venting device for preventing oil leakage in a gearbox, as proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the condenser cylinder of a venting device for preventing oil leakage in a gearbox, as proposed in this utility model.

[0030] Figure 6 This is a split view of the filter screen of a venting device for preventing oil leakage in a gearbox, as proposed in this utility model.

[0031] Legend:

[0032] 1. Transmission box; 2. Condenser; 3. Oil-gas separation mechanism; 301. Protective plate; 302. Spiral gas conveying pipe; 303. Guide vane; 304. Heat sink; 305. Vortex generator; 306. Adsorption net one; 307. Water cooling assembly; 3071. Water tank; 3072. Water pump; 3073. Water delivery pipe; 3074. Return pipe; 308. Recovery assembly; 3081. Fixing ring; 3082. Adsorption net two; 4. Protective cylinder; 5. Dustproof machine 501. Filter screen; 502. Fixing frame; 503. Limiting ring; 504. Limiting groove; 505. Rotating shaft; 506. Spiral blade; 507. Cleaning brush; 6. Fixing mechanism; 601. Outer magnetic ring; 602. Inner magnetic ring; 7. Inspection cover; 8. Anti-backflow mechanism; 801. Funnel bottom plate; 802. Rubber pad; 803. Gravity ball; 9. Connecting block; 10. Protective cover; 11. Fixing block; 12. Threaded groove; 13. Threaded sleeve. Detailed Implementation

[0033] 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.

[0034] Reference Figure 3 , Figure 4 and Figure 5 An embodiment of this utility model provides a venting device for preventing oil leakage in a gearbox, comprising a transmission box 1, a condenser cylinder 2 fixedly connected to the top right side of the transmission box 1 for venting, an oil-gas separation mechanism 3 provided on the inner wall of the condenser cylinder 2 for oil-gas separation, a protective cylinder 4 fixedly connected to the top of the condenser cylinder 2 for protecting the condenser cylinder 2, a dustproof mechanism 5 provided on the inner wall of the protective cylinder 4 for dust prevention, a maintenance cover 7 rotatably connected to the top of the transmission box 1, a fixing mechanism 6 provided on the inner wall of the condenser cylinder 2, and an anti-backflow mechanism 8 provided at the bottom of the condenser cylinder 2;

[0035] The oil-gas separation mechanism 3 includes two protective plates 301, which fix and protect the spiral gas delivery pipe 302. The outer walls of both protective plates 301 are fixedly connected to the inner wall of the condenser cylinder 2. The same spiral gas delivery pipe 302 is fixedly connected to adjacent sides of the two protective plates 301. The spiral gas delivery pipe 302 allows air to pass through the gearbox and increases the oil-gas movement distance. Multiple guide vanes 303 are fixedly connected to the inner wall of the spiral gas delivery pipe 302. The multiple guide vanes 303 can extend the airflow path and agitate the mixing. Multiple heat sinks 304 are fixedly connected to the outer wall of the spiral gas delivery pipe 302. 304 increases the heat dissipation rate of oil and gas in the spiral gas pipe 302. The bottom of the bottom protective plate 301 is fixedly connected to the bottom of the vortex generator 305. The vortex generator 305 causes the oil and gas to generate a rotating vortex, which, together with the spiral flow of the spiral pipe, enhances the centrifugal force. The top of the top protective plate 301 is fixedly connected to the top of the adsorption net 306, which is made of activated carbon and is used to absorb the residual oil in the oil and gas. The front side of the transmission box 1 is provided with a water cooling component 307, which condenses and liquefies the oil in the oil and gas. The inner wall of the condenser cylinder 2 is provided with a recovery component 308, which is used to recover the water condensed due to water cooling.

[0036] The water-cooling assembly 307 includes a water tank 3071 for storing cooling water. The rear of the water tank 3071 is fixedly connected to the front of the transmission box 1. A water pump 3072 is fixedly connected to the top of the water tank 3071. The water pump 3072 draws in clean water and pressurizes it. The top of the water pump 3072 is connected to a water supply pipe 3073, which transports the clean water to the inner wall of the condenser cylinder 2 and flows in from the bottom of the condenser cylinder 2. This allows the clean water to cool the oil and gas in the spiral gas supply pipe 302. The top right side of the water tank 3071 is connected to a return pipe 3074, which is connected to the top of the condenser cylinder 2. This allows the clean water that has played a condensing role to flow back to the water tank 3071 for cooling again.

[0037] The recovery assembly 308 includes two fixing rings 3081, which are used to fix the second adsorption net 3082. The outer walls of the two fixing rings 3081 are fixedly connected to the bottom of the inner wall of the condenser cylinder 2. The same second adsorption net 3082 is fixedly connected to the adjacent side of the two fixing rings 3081. The second adsorption net 3082 can absorb water in the oil and gas, but does not absorb oil.

[0038] Specifically, by fixing two protective plates 301 to the inner wall of the condenser cylinder 2, and clamping the spiral gas delivery pipe 302 on the adjacent sides of the two protective plates 301, the spiral gas delivery pipe 302 extends in a spiral shape, and multiple guide vanes 303 are welded to the inner wall. The guide vanes 303 are spirally distributed at a specific angle, causing the oil and gas to rotate. Through centrifugal force, the oil mist is thrown towards the pipe wall, while extending the airflow path and enhancing the collision and condensation effect of the oil mist with the pipe wall. Multiple heat dissipation fins 304 fixed on the outer wall of the spiral gas delivery pipe 302 increase the heat dissipation rate of the oil and gas. At the same time, the water pump 3072 in the water cooling assembly 307 draws water from the water tank. Water is pumped from 3071 and sent to the bottom of the condenser cylinder 2 through the water pipe 3073. It flows along the outer wall of the spiral gas pipe 302 and absorbs the heat of the oil and gas inside the pipe through the heat sink 304, accelerating the condensation of the oil. The vortex generator 305 fixed on the bottom protective plate 301 forms a rotating airflow at the inlet of the gas pipe, which superimposes with the spiral flow of the spiral gas pipe 302 to further enhance the centrifugal separation effect. The top of the spiral gas pipe 302 is equipped with an adsorption net 306 made of activated carbon, which can adsorb the oil mist particles remaining after condensation, forming a multi-stage separation system to achieve efficient separation of oil and gas and reduce oil loss.

[0039] Reference Figure 2 , Figure 3 and Figure 6 The dustproof mechanism 5 includes a filter screen 501, which filters the incoming and outgoing gas. The outer wall of the filter screen 501 is fixedly connected to the top of the inner wall of the protective cylinder 4. Two fixing brackets 502 are fixedly connected to the inner wall of the protective cylinder 4. The same limiting ring 503 is fixedly connected to the adjacent side of the two fixing brackets 502. The fixing brackets 502 and the limiting ring 503 restrict the position of the rotating shaft 505. The inner wall of the limiting ring 503 is rotatably connected to the rotating shaft 505. The rotating shaft 505 is used to transmit power. A limiting groove 504 is opened in the middle of the outer wall of the rotating shaft 505. The limiting groove 504 is slidably connected to the limiting ring 503. A spiral blade 506 is fixedly connected to the bottom end of the rotating shaft 505. The spiral blade 506 absorbs the power of the oil and gas flow, thereby providing power for the rotation of the cleaning brush 507. The cleaning brush 507 is fixedly connected to the top end of the rotating shaft 505. The cleaning brush 507 cleans the top end of the filter screen 501.

[0040] Specifically, the filter screen 501 first intercepts dust in the air entering and exiting the protective cylinder 4, completing the initial filtration. When the airflow generated by the gearbox or the external airflow passes through the protective cylinder 4, the airflow impacts the spiral blades 506, and the spiral blades 506 generate rotational power under force. Since the rotating shaft 505 is fixedly connected to the spiral blades 506, it smoothly transmits power under the constraint of the limiting ring 503 and the limiting groove 504. The cleaning brush 507 at the top of the rotating shaft 505 rotates with the rotating shaft 505, continuously cleaning the surface of the filter screen 501 to prevent dust accumulation and blockage of the filter screen, ensuring smooth airflow and dust prevention effect.

[0041] Reference Figure 1 , Figure 2 and Figure 3 The fixing mechanism 6 includes an outer magnetic ring 601, the outer wall of which is fixedly connected to the top of the inner wall of the condenser cylinder 2. An inner magnetic ring 602 is fixedly connected to the bottom of the protective cylinder 4. The protective cylinder 4 is fixed to the top of the inner wall of the condenser cylinder 2 by the magnetic attraction between the outer and inner magnetic rings 601 and 602. The anti-backflow mechanism 8 includes a funnel bottom plate 801, the top of which is fixedly connected to the bottom of the condenser cylinder 2. A rubber pad 802 is fixedly connected to the inner wall of the funnel bottom plate 801. The rubber pad 802 can dampen the vibration when the gravity ball 803 falls. A gravity ball 803 is fixedly connected to the inner wall of the funnel bottom plate 801. The gravity ball 803 restricts the entry and exit of oil and gas and the liquid after condensation. Multiple connecting blocks 9 are fixedly connected to the top of the protective cylinder 4. The top of the multiple connecting blocks 9 is fixedly connected to the same protective cover 10. The protective cover 10 is used to prevent rainwater from entering the protective cylinder 4. A fixing block 11 is fixedly connected to the top of the inspection cover 7. The inner wall of the fixing block 11 is provided with a threaded groove 12. A threaded sleeve 13 is fixedly connected to the outer wall of the condensing cylinder 2. The fixing of the condensing cylinder 2 is controllable through the threaded groove 12 and the threaded sleeve 13.

[0042] Specifically, during installation, the inner magnetic ring 602 at the bottom of the protective cylinder 4 is brought close to the outer magnetic ring 601 at the top of the condenser cylinder 2. The magnetic attraction between the inner and outer magnetic rings 602 and 601 quickly fixes the protective cylinder 4 to the top of the inner wall of the condenser cylinder 2. During disassembly, applying external force to overcome the magnetic force allows for easy separation, facilitating maintenance. When the gearbox is running, the pressure generated by the internal oil and gas pushes open the gravity ball 803, allowing the oil and gas to escape smoothly. Simultaneously, the rubber pad 802 reduces the impact of the gravity ball 803 as it rises. When the gearbox stops, the gravity ball 803 falls due to its own weight, and together with the rubber pad 802, it tightly seals the bottom plate 801 of the funnel to prevent external water vapor from flowing back in, and at the same time intercepts the backflow of condensed liquid. When installing the maintenance cover 7, the threaded groove 12 on the inner wall of the fixing block 11 is screwed into the threaded sleeve 13 on the outer wall of the condenser cylinder 2 and tightened. When disassembling, it is rotated in the opposite direction. The protective cover 10 is fixed to the top of the protective cylinder 4 by the connecting block 9. The arc-shaped structure of the protective cover 10 can effectively guide rainwater to flow outward and prevent rainwater from entering the protective cylinder 4.

[0043] Working principle: The spiral gas delivery pipe 302 is fixed inside the condenser cylinder 2 by two protective plates 301. The guide vanes 303 on the inner wall of the spiral gas delivery pipe 302 are spirally distributed at a specific angle to guide the oil and gas to rotate. Centrifugal force is used to throw the oil mist towards the pipe wall, while extending the airflow path and enhancing the collision and condensation effect of the oil mist with the pipe wall. The heat dissipation fins 304 on the outer wall of the spiral gas delivery pipe 302 and the water cooling component 307 work together to dissipate heat. Water is drawn from the water tank 3071 by the water pump 3072 and flows along the outer wall of the spiral gas delivery pipe 302 through the water delivery pipe 3073. The heat dissipation fins 304 absorb the heat of the oil and gas in the pipe, accelerating the condensation and liquefaction of the oil. The vortex generator 305 fixed by the bottom protective plate 301 forms a rotating airflow at the gas delivery pipe inlet, further enhancing the centrifugal separation effect. Finally, the adsorption net 306 made of activated carbon at the top of the spiral gas delivery pipe 302 adsorbs the oil mist particles remaining after condensation. Through multi-stage separation, efficient separation of oil and gas is achieved, reducing oil loss.

[0044] Furthermore, the filter screen 501 is fixed to the top of the inner wall of the protective cylinder 4 to physically intercept dust particles in the incoming and outgoing air, achieving preliminary purification. When the gearbox is ventilated or external air flows, the airflow passes through the protective cylinder 4 and impacts the spiral blades 506. The flow of the air causes the blades to generate rotational force. The rotating shaft 505 is rigidly connected to the spiral blades 506. Under the sliding constraint of the limiting ring 503 and the limiting groove 504, the rotation process is ensured to be stable and without deviation, and the power is efficiently transmitted to the top, so that the cleaning brush 507 rotates synchronously with the rotating shaft 505. Through mechanical friction, the surface of the filter screen 501 is continuously cleaned, preventing dust from accumulating and clogging the mesh. This ensures both ventilation efficiency and extends the service life of the filter screen.

[0045] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ventilation device for preventing oil leakage from a gear box, comprising a transmission case (1), characterized in that: A condenser cylinder (2) is fixedly connected to the top right side of the transmission box (1). An oil-gas separation mechanism (3) is provided on the inner wall of the condenser cylinder (2). A protective cylinder (4) is fixedly connected to the top of the condenser cylinder (2). A dustproof mechanism (5) is provided on the inner wall of the protective cylinder (4). An inspection cover (7) is rotatably connected to the top of the transmission box (1). A fixing mechanism (6) is provided on the inner wall of the condenser cylinder (2). An anti-backflow mechanism (8) is provided at the bottom of the condenser cylinder (2). The oil-gas separation mechanism (3) includes two protective plates (301). The outer walls of the two protective plates (301) are fixedly connected to the inner wall of the condenser cylinder (2). The same spiral gas delivery pipe (302) is fixedly connected to the adjacent side of the two protective plates (301). Multiple guide vanes (303) are fixedly connected to the inner wall of the spiral gas delivery pipe (302). Multiple heat sinks (304) are fixedly connected to the outer wall of the spiral gas delivery pipe (302). A vortex generator (305) is fixedly connected to the bottom end of the bottom protective plate (301). An adsorption net (306) is fixedly connected to the top of the top protective plate (301). A water cooling component (307) is provided on the front side of the transmission box (1). A recovery component (308) is provided on the inner wall of the condenser cylinder (2).

2. The venting device for preventing oil leakage in a gearbox according to claim 1, characterized in that: The dustproof mechanism (5) includes a filter screen (501). The outer wall of the filter screen (501) is fixedly connected to the top of the inner wall of the protective cylinder (4). The inner wall of the protective cylinder (4) is fixedly connected to two fixing brackets (502). The same limiting ring (503) is fixedly connected to the adjacent side of the two fixing brackets (502). The inner wall of the limiting ring (503) is rotatably connected to a rotating shaft (505). A limiting groove (504) is opened in the middle of the outer wall of the rotating shaft (505). A spiral blade (506) is fixedly connected to the bottom end of the rotating shaft (505). A cleaning brush (507) is fixedly connected to the top end of the rotating shaft (505).

3. The venting device for preventing oil leakage in a gearbox according to claim 1, characterized in that: The fixing mechanism (6) includes an outer magnetic ring (601), the outer wall of which is fixedly connected to the top of the inner wall of the condenser cylinder (2), and the bottom end of the protective cylinder (4) is fixedly connected to an inner magnetic ring (602).

4. The venting device for preventing oil leakage in a gearbox according to claim 1, characterized in that: The anti-backflow mechanism (8) includes a funnel bottom plate (801), the top of which is fixedly connected to the bottom of the condenser cylinder (2), a rubber pad (802) is fixedly connected to the inner wall of the funnel bottom plate (801), and a gravity ball (803) is fixedly connected to the inner wall of the funnel bottom plate (801).

5. A venting device for preventing oil leakage in a gearbox according to claim 1, characterized in that: The water-cooling assembly (307) includes a water tank (3071), the rear side of which is fixedly connected to the front side of the transmission box (1), a water pump (3072) is fixedly connected to the top of the water tank (3071), a water supply pipe (3073) is connected to the top of the water pump (3072), and a return pipe (3074) is connected to the top right side of the water tank (3071).

6. The venting device for preventing oil leakage in a gearbox according to claim 1, characterized in that: The recovery assembly (308) includes two fixing rings (3081), the outer walls of the two fixing rings (3081) are fixedly connected to the bottom of the inner wall of the condenser cylinder (2), and the same adsorption net (3082) is fixedly connected to the adjacent side of the two fixing rings (3081).

7. A venting device for preventing oil leakage in a gearbox according to claim 1, characterized in that: The top of the protective cylinder (4) is fixedly connected to a plurality of connecting blocks (9), and the top of each of the plurality of connecting blocks (9) is fixedly connected to the same protective cover (10).

8. A venting device for preventing oil leakage in a gearbox according to claim 1, characterized in that: The top of the inspection cover (7) is fixedly connected to a fixing block (11), the inner wall of the fixing block (11) is provided with a threaded groove (12), and the outer wall of the condenser cylinder (2) is fixedly connected to a threaded sleeve (13).

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