Ventilation device of gear box

Abstract

The invention discloses a ventilation device of a gear box, relates to the technical field of ventilation of gear boxes, and solves the problem that some oil is attached to gas and discharged in the exhaust process of the ventilation device of the gear box. A ventilation device of a gearbox comprises a box base, a lower shell and an upper shell, the upper end of the upper shell is connected with a ventilation pipe in a penetrating mode, an outer tooth groove is formed in the outer surface, close to the upper end, of the ventilation pipe, a ventilation cap is arranged at the upper end of the ventilation pipe, and a plurality of ventilation holes are formed in the outer surface, close to the upper end, of the ventilation cap. And an internal thread ring is fixedly connected to the bottom end of the interior of the ventilation cap, the ventilation cap is in threaded connection with the outer tooth groove through the internal thread ring, and a filter plate is detachably connected to the position, located in the ventilation pipe, below the ventilation cap through a limiting device. Through the staggered baffles, oil attached to gas can be blocked to a certain degree, then the oil is filtered through the filter plate and adsorbed through the sponge mat, and finally the gas is exhausted through the vent holes.

Description

Technical Field

[0001] The invention relates to the technical field of gear box ventilation, in particular to a ventilation device for a gear box. Background Art

[0002] Gearboxes are widely used, for example in wind turbines. Gearboxes are an important mechanical component that is widely used in wind turbines. Their main function is to transfer the power generated by the wind rotor to the generator and make it rotate at a corresponding speed. The gearbox generates heat during operation, which causes the temperature inside the box to rise and the gas to expand. If the box does not have a vent, the internal pressure will increase, which may cause the lubricating oil to leak along other gaps such as the shaft seal. The function of the vent is to allow hot air to be discharged, maintain the pressure balance inside and outside the box, and prevent oil leakage. In addition, the vent can also help dissipate heat and prevent the internal temperature of the gearbox from being too high, thereby protecting components such as gears and bearings from being affected by thermal expansion.

[0003] However, during the exhaust process of some gearbox ventilation devices, some oil will adhere to the gas, and the oil will be wasted after being discharged through the ventilation pipe, which will reduce the oil in the gearbox and further affect the service life of the equipment. In addition, if the filter net inside the ventilation pipe is not cleaned for a long time, it will be clogged by the accumulated oil, thereby affecting the operation of the equipment. Therefore, it does not meet the existing needs, and we have proposed a gearbox ventilation device. Summary of the invention

[0004] The object of the present invention is to provide a ventilation device for a gear box to solve the problem that during the exhaust process of the ventilation device of the gear box proposed in the above background technology, some oil will adhere to the gas, and the oil will be wasted after being discharged through the ventilation pipe, so that the oil in the gear box is reduced, thereby affecting the service life of the equipment, and if the filter net inside the ventilation pipe is not cleaned for a long time, it will be blocked by the accumulated oil, thereby affecting the operation of the equipment.

[0005] To achieve the above object, the present invention provides the following technical solutions: a ventilation device for a gear box, comprising a box seat, a lower shell and an upper shell, wherein the lower shell is fixedly arranged at the upper end of the box seat, and the lower shell and the upper shell are connected by bolts, a low-speed shaft is fixedly arranged between the lower shell and one side of the interior of the upper shell, a large gear is arranged on the outer surface of the low-speed shaft, a high-speed shaft is arranged on one side of the low-speed shaft, a small gear is arranged on the outer surface of the high-speed shaft, and the outer surface of the small gear is meshed with the outer surface of the large gear;

[0006] The upper end of the upper shell is connected with a ventilation pipe, the outer surface of the ventilation pipe near the upper end is provided with an external tooth groove, the upper end of the ventilation pipe is provided with a ventilation cap, the outer surface of the ventilation cap near the upper end is provided with a plurality of ventilation holes, the bottom end of the ventilation cap is fixedly connected with an internal threaded ring, and the ventilation cap is threadably connected to the external tooth groove through the internal threaded ring, and a filter plate is detachably connected to the bottom of the ventilation cap and located inside the ventilation pipe through a limiting device.

[0007] Preferably, a plurality of baffles are staggeredly provided below the filter plate and on the inner wall of the ventilation pipe, and a through hole is formed on the surface of each of the baffles.

[0008] Preferably, each of the baffles is arranged to be inclined downward, and the shape of the baffle is semicircular.

[0009] Preferably, the limiting device includes two fixing seats, and the two fixing seats are fixed on both sides of the outer surface of the ventilation pipe, and movable grooves are opened inside the two fixing seats, and slots are opened on the side where the two movable grooves are close to each other and inside the fixing seats.

[0010] Preferably, the interiors of the two movable grooves are movably connected to limit rods, the ends of the two limit rods that are away from each other extend through the outside of the fixed seat, and the ends of the two limit rods that are close to each other extend through the interior of the slots.

[0011] Preferably, the outer surface of the limiting rod at one end inside the movable groove is fixedly connected to a limiting plate, a spring is fixedly connected between one side of the limiting plate and one side of the inner wall of the movable groove, and the spring is wound around the outer surface of the limiting rod.

[0012] Preferably, a docking groove is provided on one side of the inner wall of the ventilation pipe, the filter plate is inserted into the inside of the docking groove, and the upper and lower inner walls of the docking groove are in sealing contact with the upper and lower outer surfaces of the filter plate through sealing gaskets.

[0013] Preferably, both sides of the outer surface of the filter plate are fixedly connected with connecting plates docked with the fixing seat, and one side of the two connecting plates close to the fixing seat is fixedly connected with plug-in plates, and the plug-in plates are plugged into corresponding slots.

[0014] Preferably, limiting grooves are provided on the sides of the two plug boards that are away from each other, and one end of the limiting rod movably extends through the inside of the slot and is plugged into the corresponding limiting groove.

[0015] Preferably, a connecting column is fixedly connected to the bottom end of the vent cap, and the outer surface of the connecting column is arranged in an arc shape. A sponge pad is fixedly connected to the bottom end of the connecting column, and the outer surface of the sponge pad fits with the inner wall of the vent pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can block the oil attached to the gas by the baffles staggered inside the ventilation pipe. When a certain amount of oil is accumulated at the bottom of the baffle, the oil slides along the inclined surface of the baffle and accumulates together, and finally drips back into the gear box, and passes through the through holes arranged on the surface of the baffle without hindering the discharge of the gas. Then, the gas is filtered by the filter plate and adsorbed by the sponge pad to collect the oil in the gas, and finally the gas is discharged through the vent hole of the vent cap;

[0018] 2. When the filter plate has been filtering and adhering for a long time, the present invention pulls the limiting rods of the two fixing seats to make the limiting rods drive the limiting plate extrusion spring to compress, so that one end of the limiting rod is separated from the plug-in connection with the limiting groove, and the limit of the plug-in plate is released. Then, the plug-in plate can be separated from the inside of the slot, and the filter plate can be removed from the inside of the docking groove for cleaning, so as to prevent the filter plate from being blocked by the accumulated oil, thereby affecting the operation of the equipment;

[0019] 3. The present invention rotates the vent cap so that the internal threaded ring thread inside the vent cap rotates on the external tooth groove of the vent pipe, thereby driving the connecting column and the sponge pad close to the filter plate, and then through the extrusion cooperation between the connecting column and the filter plate, the oil adsorbed in the sponge pad is squeezed out and passes through the filter plate and the baffle to fall into the interior of the gear box again, thereby avoiding waste of oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A front cross-sectional view of the present invention as a whole;

[0022] Figure 3 For the present invention Figure 2 The structural diagram at A in the middle;

[0023] Figure 4 For the present invention Figure 2 Schematic diagram of the structure at B in the middle;

[0024] Figure 5 A top cross-sectional view of the connection between the vent pipe and the filter plate of the present invention;

[0025] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at C in the middle.

[0026] In the figure: 1, box seat; 2, lower shell; 3, upper shell; 4, low-speed shaft; 5, large gear; 6, high-speed shaft; 7, small gear; 8, ventilation pipe; 801, docking groove; 802, external tooth groove; 9, ventilation cap; 901, ventilation hole; 10, baffle; 1001, through hole; 11, limiting device; 1101, fixed seat; 1102, movable groove; 1103, limiting rod; 1104, limiting plate; 1105, spring; 1106, slot; 12, filter plate; 13, connecting plate; 14, internal thread ring; 15, connecting column; 16, sponge pad; 17, plug plate; 1701, limiting groove. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] See also Figures 1 to 6 , an embodiment of the present invention: a ventilation device of a gear box, comprising a box seat 1, a lower shell 2 and an upper shell 3, the lower shell 2 is fixedly arranged at the upper end of the box seat 1, and the lower shell 2 and the upper shell 3 are connected by bolts, a low-speed shaft 4 is fixedly arranged between the lower shell 2 and one side of the interior of the upper shell 3, a large gear 5 is arranged on the outer surface of the low-speed shaft 4, a high-speed shaft 6 is arranged on one side of the low-speed shaft 4, a small gear 7 is arranged on the outer surface of the high-speed shaft 6, and the outer surface of the small gear 7 is meshed with the outer surface of the large gear 5;

[0029] The upper end of the upper shell 3 is connected with a ventilation pipe 8, and the outer surface of the ventilation pipe 8 near the upper end is provided with an external tooth groove 802. The upper end of the ventilation pipe 8 is provided with a ventilation cap 9, and the outer surface of the ventilation cap 9 near the upper end is provided with a plurality of ventilation holes 901. The bottom end of the ventilation cap 9 is fixedly connected with an internal thread ring 14, and the ventilation cap 9 is threadedly connected to the external tooth groove 802 through the internal thread ring 14. Below the ventilation cap 9 and located inside the ventilation pipe 8, a filter plate 12 is detachably connected through a limit device 11.

[0030] Below the filter plate 12, and on the inner wall of the ventilation pipe 8, a plurality of baffles 10 are staggeredly arranged, each baffle 10 has a through hole 1001 extending through the surface thereof, each baffle 10 is arranged to be inclined downward, and the shape of the baffle 10 is semicircular.

[0031] The gas passes through the baffles 10 staggered inside the ventilation pipe 8, which can block the oil attached to the gas to a certain extent. When a certain amount of oil accumulates at the bottom of the baffle 10, the oil slides along the inclined surface of the baffle 10 and accumulates together, and finally drips back into the gear box, and passes through the through holes 1001 set on the surface of the baffle 10, without hindering the discharge of the gas.

[0032] A connecting column 15 is fixedly connected to the bottom end of the vent cap 9, and the outer surface of the connecting column 15 is arranged in an arc shape. A sponge pad 16 is fixedly connected to the bottom end of the connecting column 15, and the outer surface of the sponge pad 16 is fitted with the inner wall of the vent pipe 8. By rotating the vent cap 9, the internal threaded ring 14 inside the vent cap 9 is threadedly rotated on the outer tooth groove 802 of the vent pipe 8, thereby driving the connecting column 15 and the sponge pad 16 close to the filter plate 12, and then through the extrusion cooperation between the connecting column 15 and the filter plate 12, the oil adsorbed in the sponge pad 16 is squeezed out, and passes through the filter plate 12 and the baffle 10, and falls into the interior of the gear box again, thereby avoiding waste of oil.

[0033] The limiting device 11 includes two fixed seats 1101, and the two fixed seats 1101 are fixed on both sides of the outer surface of the ventilation pipe 8, and movable grooves 1102 are opened inside the two fixed seats 1101. The two movable grooves 1102 are close to each other on one side, and slots 1106 are opened inside the fixed seats 1101. The interiors of the two movable grooves 1102 are movably connected with limiting rods 1103, and the ends of the two limiting rods 1103 that are away from each other extend to the outside of the fixed seats 1101, and the ends of the two limiting rods 1103 that are close to each other extend to the inside of the slots 1106. The outer surface of the limiting rod 1103 at one end inside the movable groove 1102 is fixedly connected to a limiting plate 1104, and a spring 1105 is fixedly connected between one side of the limiting plate 1104 and one side of the inner wall of the movable groove 1102, and the spring 1105 is wound around the outer surface of the limiting rod 1103.

[0034] A docking groove 801 is provided on one side of the inner wall of the ventilation pipe 8, and the filter plate 12 is inserted into the inside of the docking groove 801. The upper and lower inner walls of the docking groove 801 are in sealing contact with the upper and lower outer surfaces of the filter plate 12 through sealing gaskets. Both sides of the outer surface of the filter plate 12 are fixedly connected with connecting plates 13 that are docked with the fixing seat 1101. The two connecting plates 13 are fixedly connected with plug plates 17 on one side close to the fixing seat 1101, and the plug plates 17 are plugged into the corresponding slots 1106. Limiting grooves 1701 are provided on the sides of the two plug plates 17 that are away from each other, and the limiting rod 1103 movably extends through one end that extends into the slot 1106 and is plugged into the corresponding limiting groove 1701.

[0035] Pull the limiting rod 1103 of the two fixing seats 1101, so that the limiting rod 1103 drives the limiting plate 1104 to compress the spring 1105, so that one end of the limiting rod 1103 is disengaged from the connection with the limiting groove 1701, and the limiting of the plug plate 17 is released. Then, the plug plate 17 can be disengaged from the inside of the slot 1106, and the filter plate 12 can be removed from the inside of the docking groove 801 for cleaning, so as to prevent the filter plate 12 from being blocked by the accumulated oil, thereby affecting the operation of the equipment.

[0036] Working principle: When the ventilation device of the gear box is used, the gas passes through the baffles 10 staggered inside the ventilation pipe 8, which can block the oil attached to the gas to a certain extent. When a certain amount of oil accumulates at the bottom of the baffle 10, the oil slides along the inclined surface of the baffle 10 and accumulates together, and finally drips back into the gear box, and passes through the through hole 1001 set on the surface of the baffle 10 without hindering the discharge of the gas. Then the gas is filtered by the filter plate 12 and adsorbed by the sponge pad 16 to collect the oil in the gas, and finally the gas is discharged through the vent hole 901 of the vent cap 9;

[0037] After the filter plate 12 has been filtering for a long time, the limiting rods 1103 of the two fixing seats 1101 are pulled, so that the limiting rods 1103 drive the limiting plate 1104 to compress the spring 1105, so that one end of the limiting rod 1103 is disengaged from the plugging of the limiting groove 1701, and the limit of the plug plate 17 is released. Then, the plug plate 17 can be disengaged from the inside of the slot 1106, and the filter plate 12 can be removed from the inside of the docking groove 801 for cleaning;

[0038] When the sponge pad 16 is saturated with adsorption, the vent cap 9 is rotated so that the internal threaded ring 14 inside the vent cap 9 is threadedly rotated on the external tooth groove 802 of the vent pipe 8, thereby driving the connecting column 15 and the sponge pad 16 close to the filter plate 12, and then the oil adsorbed in the sponge pad 16 is squeezed out through the extrusion cooperation between the connecting column 15 and the filter plate 12, and falls into the interior of the gear box again through the filter plate 12 and the baffle 10.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A ventilation device for a gear box, comprising a box seat (1), a lower shell (2) and an upper shell (3), wherein the lower shell (2) is fixedly arranged at the upper end of the box seat (1), and the lower shell (2) and the upper shell (3) are connected by bolts, characterized in that: A low-speed shaft (4) is fixedly provided between one side of the lower housing (2) and the upper housing (3), a large gear (5) is provided on the outer surface of the low-speed shaft (4), a high-speed shaft (6) is provided on one side of the low-speed shaft (4), a small gear (7) is provided on the outer surface of the high-speed shaft (6), and the outer surface of the small gear (7) is meshed with the outer surface of the large gear (5); The upper end of the upper shell (3) is connected to a ventilation pipe (8), and an outer surface of the ventilation pipe (8) near the upper end is provided with an external tooth groove (802). The upper end of the ventilation pipe (8) is provided with a ventilation cap (9), and an outer surface of the ventilation cap (9) near the upper end is provided with a plurality of ventilation holes (901). The bottom end of the ventilation cap (9) is fixedly connected to an internal thread ring (14), and the ventilation cap (9) is threadedly connected to the external tooth groove (802) via the internal thread ring (14). Below the ventilation cap (9) and located inside the ventilation pipe (8), a filter plate (12) is detachably connected via a limiting device (11).

2. A ventilation device for a gear box according to claim 1, characterized in that: Below the filter plate (12), a plurality of baffles (10) are arranged in an interlaced manner on the inner wall of the ventilation pipe (8), and a through hole (1001) is provided on the surface of each baffle (10).

3. A ventilation device for a gear box according to claim 2, characterized in that: Each of the baffles (10) is arranged to be inclined downward, and the shape of the baffle (10) is semicircular.

4. A ventilation device for a gear box according to claim 1, characterized in that: The limiting device (11) comprises two fixing seats (1101), and the two fixing seats (1101) are fixedly arranged on both sides of the outer surface of the ventilation pipe (8), and the inside of the two fixing seats (1101) is provided with a movable groove (1102), and a slot (1106) is provided on the side where the two movable grooves (1102) are close to each other and located inside the fixing seats (1101).

5. A ventilation device for a gear box according to claim 4, characterized in that: The interiors of the two movable grooves (1102) are both movably connected to the limiting rods (1103); the ends of the two limiting rods (1103) that are away from each other extend through the outside of the fixing seat (1101); and the ends of the two limiting rods (1103) that are close to each other extend through the interior of the slot (1106).

6. A ventilation device for a gear box according to claim 5, characterized in that: The outer surface of the limiting rod (1103) at one end inside the movable groove (1102) is fixedly connected to the limiting plate (1104), and a spring (1105) is fixedly connected between one side of the limiting plate (1104) and one side of the inner wall of the movable groove (1102), and the spring (1105) is wound around the outer surface of the limiting rod (1103).

7. The ventilation device of a gear box according to claim 1, characterized in that: A docking groove (801) is provided on one side of the inner wall of the ventilation pipe (8), and the filter plate (12) is inserted into the interior of the docking groove (801). The upper and lower inner walls of the docking groove (801) are in sealing contact with the upper and lower outer surfaces of the filter plate (12) via sealing gaskets.

8. The ventilation device of a gear box according to claim 5, characterized in that: Both sides of the outer surface of the filter plate (12) are fixedly connected with connecting plates (13) docked with the fixing seat (1101), and both sides of the two connecting plates (13) close to the fixing seat (1101) are fixedly connected with plug plates (17), and the plug plates (17) are plugged into corresponding slots (1106).

9. A ventilation device for a gear box according to claim 8, characterized in that: A limiting groove (1701) is provided on one side of the two plug plates (17) that is away from each other, and one end of the limiting rod (1103) movably extends through the inside of the slot (1106) and is plugged into the corresponding limiting groove (1701).

10. The ventilation device of a gear box according to claim 1, characterized in that: The bottom end of the inside of the vent cap (9) is fixedly connected to a connecting column (15), and the outer surface of the connecting column (15) is arranged in an arc shape. The bottom end of the connecting column (15) is fixedly connected to a sponge pad (16), and the outer surface of the sponge pad (16) is in contact with the inner wall of the vent pipe (8).

Images