CN113719602B - Gearbox ventilation device and gearbox - Google Patents
Gearbox ventilation device and gearbox Download PDFInfo
- Publication number
- CN113719602B CN113719602B CN202110787284.3A CN202110787284A CN113719602B CN 113719602 B CN113719602 B CN 113719602B CN 202110787284 A CN202110787284 A CN 202110787284A CN 113719602 B CN113719602 B CN 113719602B
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- China
- Prior art keywords
- sealing
- hole
- gearbox
- sheath
- sealing element
- Prior art date
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Links
- 238000009423 ventilation Methods 0.000 title abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 138
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 239000003595 mist Substances 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/027—Gearboxes; Mounting gearing therein characterised by means for venting gearboxes, e.g. air breathers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention relates to the technical field of gearboxes, in particular to a gearbox ventilation device and a gearbox. The device comprises a sealing element, a sheath, a sealing ball and a first connecting protrusion, wherein a first through hole is formed in the sealing element along the length direction of the sealing element, a groove is formed in the first end of the sealing element, the groove is communicated with the first end of the first through hole, and the second end of the first through hole is used for being communicated with a cavity of a gearbox; the sealing ball is movably arranged in the groove, and can block the first through hole; the sheath is sleeved on the first end of the sealing element in a matching way, a movable gap is arranged between the sealing ball and the sheath, an exhaust gap is arranged between the groove and the sheath, the sealing sleeve is provided with a side plate, and the side plate gap is arranged on the side part of the first end of the sealing element; the first connecting protrusion is arranged between the side plate and the side part of the first end of the sealing piece, and a second through hole is formed in the first connecting protrusion. The gearbox ventilation device and the gearbox provided by the invention can prevent water mist, dust and water flow from being sucked into the gearbox cavity.
Description
Technical Field
The invention relates to the technical field of gearboxes, in particular to a gearbox ventilation device and a gearbox.
Background
The inside sealed cavity that is of gearbox, in gearbox working process, the internal atmospheric pressure of cavity is very high, consequently need set up the air vent on the gearbox, discharge the gearbox to high-pressure gas, keep the inside and air pressure balance of gearbox, avoid the interior excessive pressure of cavity to lead to sealing position damage such as oil blanket, faying face or ooze oil in the gearbox working process, arouse gearbox trouble. Meanwhile, the gearbox oil has strict water content requirements, and if the water content of the gearbox oil exceeds a certain limit value in the use process, the gearbox oil can be emulsified, so that the original lubricating performance is lost, and the reliability and the durability of the gearbox can be affected. Therefore, the vent hole needs to have a water inlet prevention function, and the gearbox vent pipe in the prior art has no effective structural design for preventing water invasion and water mist inhalation, so that when the gearbox cavity is in a negative pressure state, the water mist can not be prevented from being inhaled into the gearbox cavity.
Disclosure of Invention
The application provides a gearbox breather and gearbox, solved among the prior art when gearbox cavity was in the negative pressure state, can't prevent the gearbox cavity to inhale the technical problem of water smoke.
In one aspect, the present application provides a transmission breather device comprising a seal, a boot, a sealing ball, and a first connection boss, wherein:
the sealing element is provided with a first end and a second end which are opposite to each other along the length direction, a first through hole is formed in the sealing element along the length direction of the sealing element, a groove is formed in the first end of the sealing element, the groove is communicated with the first end of the first through hole, and the second end of the first through hole is used for being communicated with a cavity of the gearbox;
the sealing ball is movably arranged in the groove, and the sealing ball can block the first through hole;
the sheath is sleeved on the first end of the sealing element in a matched manner, a movable gap is arranged between the sealing ball and the sheath, an exhaust gap is arranged between the groove and the sheath, the sealing sleeve is provided with a side plate, and the side plate gap is arranged on the side part of the first end of the sealing element;
the first connecting protrusion is arranged between the side plate and the side part of the first end of the sealing piece, a second through hole is formed in the first connecting protrusion, and the exhaust gap is communicated with the second through hole.
Further, a second connecting protrusion is further arranged between the side plate and the side part of the first end of the sealing element, the first connecting protrusion and the second connecting protrusion are sequentially arranged at intervals along the direction from the first end to the second end of the sealing element, a third through hole is formed in the second connecting protrusion, and the third through hole and the second through hole are staggered.
Further, the groove comprises a first limiting ring and a second limiting ring which are oppositely arranged, a limiting space is formed between the first limiting ring and the second limiting ring, the sealing ball is arranged in the limiting space, an exhaust gap is arranged between the first limiting ring and the sheath, and the second limiting ring is in butt joint with the sheath.
Further, the device also includes a seal tube also having opposite first and second ends along a length, the second end of the seal fixedly disposed in the first end of the seal tube, the second end of the seal tube in communication with the gearbox cavity.
Further, the sealing element is further provided with a lap joint part, and the lap joint part is lap-jointed and arranged on the pipe orifice at the first end of the sealing pipe.
Further, the second end of the sealing element is further provided with a labyrinth structure, the labyrinth structure comprises a first stop block, a connecting block and a second stop block, the first stop block, the connecting block and the second stop block are sequentially connected in the direction from the first end to the second end of the sealing element, the first stop block is combined with the second stop block to cover the second end of the sealing element along the projection of the length direction of the sealing element, a first air vent is arranged between the first stop block and the sealing tube, a second air vent is arranged between the first stop block and the sealing tube, a third air vent is arranged between the connecting block and the sealing tube, and the first air vent, the second air vent and the third air vent form an exhaust channel.
Further, a plug is arranged at the second end of the sealing tube, a fourth through hole is formed in the plug, one end of the fourth through hole is communicated with the transmission communication cavity, and the other end of the fourth through hole is communicated with the second end of the sealing tube.
Further, the plug is provided with a communication part, a limiting part and a threaded part in sequence along the direction from the first end to the second end of the sealing element, one end of the fourth through hole is arranged in the communication part, the other end of the fourth through hole is arranged in the threaded part, the communication part is fixedly arranged in the second end of the sealing tube, the limiting part is abutted to the tube orifice of the second end of the sealing tube, and the threaded part is in threaded connection with the gearbox.
Further, a groove is formed in the threaded portion, an O-shaped sealing ring is arranged on the groove in a matched mode, and the O-shaped sealing ring is close to the limiting portion.
In another aspect, the present application provides a gearbox comprising a gearbox breather as described above.
The beneficial effects of the application are as follows:
the gearbox comprises a gearbox ventilation device, when the air pressure in a gearbox cavity is larger than the atmospheric pressure, oil gas in the gearbox cavity can enter a first through hole, high-pressure air flow is formed in the first through hole, the high-pressure air flow can jack up a sealing ball and flows out of an exhaust gap between a groove and a sheath and flows into a second through hole, and because a sealing sleeve is provided with a side plate, the side plate gap is arranged at the side part of the first end of a sealing element, an exhaust port is formed between the opening of the sheath and the sealing element, and the oil gas flowing into the second through hole is discharged from the exhaust port to achieve an exhaust effect; when the air pressure of the gearbox cavity is smaller than or equal to the atmospheric pressure, the sealing ball can return to the initial position again due to the negative pressure of the cavity, so that the first through hole is blocked, the sealing effect is achieved, the through hole and the outside are kept relatively airtight, and accordingly water mist, dust and water flow are prevented from being sucked into the gearbox cavity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention.
Fig. 1 is a cross-sectional view of a transmission breather provided in the present embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The present embodiment provides a gearbox ventilation device, fig. 1 is a cross-sectional view of the gearbox ventilation device provided by the present embodiment, and referring to fig. 1, the gearbox ventilation device provided by the present embodiment includes a sealing element, a sheath 3, a sealing ball 1, and a first connection protrusion 22, the sealing element has a first end and a second end opposite to each other along a length direction, the sealing element is provided with a first through hole 29 along the length direction of the sealing element, the first end of the sealing element is provided with a groove, the groove is communicated with the first end of the first through hole 29, and the second end of the first through hole 29 is used for communicating with a cavity of a gearbox; the sealing ball 1 is movably arranged in the groove, and the sealing ball 1 can block the first through hole 29; the sheath 3 is sleeved on the first end of the sealing element in a matching way, a movable gap is arranged between the sealing ball 1 and the sheath 3, an exhaust gap is arranged between the groove and the sheath 3, the sheath 3 is provided with a side plate, and the side plate gap is arranged on the side part of the first end of the sealing element; the first coupling projection 22 is provided between the side plate and the side portion of the first end of the seal member, and the first coupling projection 22 is provided with a second through hole 26, and the exhaust gap communicates with the second through hole 26.
According to the gearbox ventilation device provided by the embodiment, when the air pressure in the gearbox cavity is greater than the atmospheric pressure, oil gas in the gearbox cavity can enter the first through hole 29, high-pressure air flow is formed in the first through hole 29, the sealing ball 1 is pushed away by the high-pressure air flow and flows out of an exhaust gap between the groove and the sheath 3 and flows into the second through hole 26 of the first connecting protrusion 22, the sheath 3 can be fixed at the first end of the sealing piece by the first connecting protrusion 22, the sheath is prevented from falling off due to the impact of the sealing ball 1, and an exhaust port is formed between the opening of the sheath 3 and the sealing piece because the side plate gap of the sealing sleeve is arranged at the side part of the first end of the sealing piece, so that the oil gas flowing into the second through hole 26 is discharged from the exhaust port, and the exhaust effect is achieved; when the air pressure of the gearbox cavity is smaller than or equal to the atmospheric pressure, the sealing ball 1 can return to the initial position again due to the negative pressure of the cavity, so that the first through hole 29 is blocked, the sealing effect is achieved, the through hole and the outside are kept relatively airtight, and water mist, dust and water flow are prevented from being sucked into the gearbox cavity.
Preferably, the sealing ball 11 may be a rubber ball in this embodiment, and the sealing member may be a cylinder or a rectangular parallelepiped, which is not limited in this embodiment.
Further, since the second through hole 26 is provided in the first connecting protrusion 22, that is, a gap is provided between the first connecting protrusion 22 and the side plate of the sheath 3, in order to ensure the fixing effect of the sheath 3, in this embodiment, a second connecting protrusion 21 is further provided between the side plate and the side portion of the first end of the sealing member, the first connecting protrusion 22 and the second connecting protrusion 21 are sequentially arranged at intervals along the direction from the first end to the second end of the sealing member, a third through hole 25 is provided on the second connecting protrusion 21, and the third through hole 25 and the second through hole 26 are staggered, that is, the second connecting protrusion 21 fills the gap between the first connecting protrusion 22 and the side plate of the sheath 3.
Further, the oil gas flowing out of the exhaust gap flows into the second through hole 26, bypasses the gap between the part between the first connecting protrusion 22 and the second connecting protrusion 21 and the side plate of the sheath 3, enters the third through hole 25, and is discharged from the exhaust port formed between the opening of the sheath 3 and the sealing member.
Preferably, in this embodiment, the cross sections of the first connecting protrusion 22 and the second connecting protrusion 21 are triangular, and the abutting positions of the first connecting protrusion 22 and the second connecting protrusion 21 and the sheath 3 are provided with abutting surfaces, so that the abutting area is increased, and the fixing effect of the sheath 3 is enhanced.
Referring to fig. 1, in this embodiment, the groove includes a first limiting ring 27 and a second limiting ring 28 that are oppositely disposed, a limiting space is formed between the first limiting ring 27 and the second limiting ring 28, the sealing ball 1 is disposed in the limiting space, an exhaust gap is disposed between the first limiting ring 27 and the sheath 3, and the second limiting ring 28 abuts against the sheath 3, so as to further ensure the fixing effect of the sheath 3.
Referring to fig. 1, the ventilation device for a gearbox in this embodiment further includes a sealing tube 4, where the sealing tube 4 also has a first end and a second end opposite to each other along a length direction, and the second end of the sealing element is fixedly disposed in the first end of the sealing tube 4, and the second end of the sealing tube 4 is communicated with the cavity of the gearbox. Preferably, the sealing element is further provided with a lap joint part 7, and the lap joint part 7 is lap-jointed and arranged on the pipe orifice at the first end of the sealing pipe 4 so as to play a limiting role.
Further, the second end of the sealing member is further provided with a labyrinth structure, the labyrinth structure comprises a first stop block 51, a connecting block and a second stop block 52 which are sequentially connected along the direction from the first end to the second end of the sealing member, wherein the first stop block 51 is combined with the second stop block 52 to cover the second end of the sealing member along the projection of the length direction of the sealing member, a first air vent is arranged between the first stop block 51 and the sealing tube 4, a second air vent is arranged between the second stop block 52 and the sealing tube 4, a third air vent is arranged between the connecting block and the sealing tube 4, and an exhaust channel is formed by the first air vent, the second air vent and the third air vent.
When the air pressure in the gearbox cavity is greater than the atmospheric pressure, the oil gas in the gearbox cavity can enter the first through hole 29 of the sealing member through the exhaust passage, and the projection of the first stop block 51 and the second stop block 52 along the length direction of the sealing member covers the second end of the sealing member, namely, the first stop block 51 and the second stop block 52 can block the oil sprayed from the gearbox cavity, so that the sprayed oil is prevented from entering the first through hole 29.
Referring to fig. 1, in this embodiment, a plug is disposed at the second end of the sealing tube 4, a second through hole 61 is disposed in the plug, one end of the second through hole 61 is communicated with the cavity of the gearbox, and the other end is communicated with the second end of the sealing tube 4.
Further, the plug is provided with a communicating portion 62, a limiting portion 63 and a threaded portion 64 in sequence along the direction from the first end to the second end of the sealing member, one end of the second through hole 61 is arranged in the communicating portion 62, the other end is arranged in the threaded portion 64, the communicating portion 62 is fixedly arranged in the second end of the sealing tube 4, the limiting portion 63 is abutted to the pipe orifice of the second end of the sealing tube 4, and the threaded portion 64 is in threaded connection with the gearbox, namely, the ventilation device is fixed on the gearbox.
Further, a groove is formed in the threaded portion 64, an O-shaped sealing ring 65 is cooperatively arranged on the groove, and the O-shaped sealing ring 65 is close to the limiting portion 63, so that the sealing effect of the ventilation device is improved.
Example 2
This embodiment provides a transmission comprising the transmission breather device of embodiment 1. When the air pressure in the gearbox cavity is greater than the atmospheric pressure, oil gas in the gearbox cavity enters the first through hole 29, high-pressure air flow is formed in the first through hole 29, the high-pressure air flow can jack up the sealing ball 1 and flows out of an exhaust gap between the groove and the sheath 3 and flows into the second through hole 26 of the first connecting protrusion 22, the sheath 3 can be fixed at the first end of the sealing element by the first connecting protrusion 22, the sheath 3 is prevented from falling off due to the impact of the sealing ball 1, and an exhaust port is formed between the opening of the sheath 3 and the sealing element because the side plate gap of the sealing sleeve is arranged at the side part of the first end of the sealing element, so the oil gas flowing into the second through hole 26 is discharged from the exhaust port to achieve the exhaust effect; when the air pressure of the gearbox cavity is smaller than or equal to the atmospheric pressure, the sealing ball 1 can return to the initial position again due to the negative pressure of the cavity, so that the first through hole 29 is blocked, the sealing effect is achieved, the through hole and the outside are kept relatively airtight, and water mist, dust and water flow are prevented from being sucked into the gearbox cavity.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. A transmission breather, the device comprising a seal, a boot, a sealing ball, a sealing tube, and a first connection boss, wherein:
the sealing element is provided with a first end and a second end which are opposite to each other along the length direction, a first through hole is formed in the sealing element along the length direction of the sealing element, a groove is formed in the first end of the sealing element, the groove is communicated with the first end of the first through hole, and the second end of the first through hole is used for being communicated with a cavity of the gearbox;
the sealing ball is movably arranged in the groove, and the sealing ball can block the first through hole;
the sheath is sleeved on the first end of the sealing element in a matched manner, a movable gap is arranged between the sealing ball and the sheath, an exhaust gap is arranged between the groove and the sheath, the sealing element is provided with a side plate, and the side plate gap is arranged on the side part of the first end of the sealing element;
the first connecting bulge is arranged between the side plate and the side part of the first end of the sealing piece, a second through hole is formed in the first connecting bulge, and the exhaust gap is communicated with the second through hole;
a second connecting protrusion is further arranged between the side plate and the side part of the first end of the sealing element, the first connecting protrusion and the second connecting protrusion are sequentially arranged at intervals along the direction from the first end to the second end of the sealing element, a third through hole is formed in the second connecting protrusion, and the third through hole and the second through hole are staggered, so that the second connecting protrusion fills a gap between the first connecting protrusion and the side plate;
the sections of the first connecting bulge and the second connecting bulge are triangular, and the abutting positions of the first connecting bulge and the second connecting bulge and the sheath are provided with abutting surfaces;
the sealing tube also has relative first end and second end along length direction, the second end of sealing member fix set up in the first end of sealing tube, the second end of sealing tube with gearbox cavity intercommunication, still be provided with overlap joint portion on the sealing member, overlap joint portion overlap joint sets up on the mouth of pipe of sealing tube first end, the second end of sealing member still is equipped with labyrinth structure, labyrinth structure includes along the first dog, connecting block and the second dog that the direction of first end of sealing member to the second end connected gradually, wherein, first dog combines the second dog is followed projection of sealing member length direction covers the second end of sealing member, first dog with be equipped with first air vent between the sealing tube, first dog with be equipped with the second vent between the sealing tube, be equipped with the third gas vent between the connecting block with the sealing tube, first air vent, second air vent and third tee bend form the exhaust passage.
2. The transmission breather of claim 1, wherein the groove comprises a first stop collar and a second stop collar disposed opposite to each other, a stop space is formed between the first stop collar and the second stop collar, the sealing ball is disposed in the stop space, an exhaust gap is disposed between the first stop collar and the sheath, and the second stop collar is abutted against the sheath.
3. The transmission breather of claim 1, wherein the second end of the sealing tube is provided with a plug, a fourth through hole is provided in the plug, one end of the fourth through hole is communicated with the transmission communication cavity, and the other end is communicated with the second end of the sealing tube.
4. A transmission breather according to claim 3, wherein the plug is provided with a communicating portion, a limiting portion and a threaded portion in this order along the direction from the first end to the second end of the seal member, one end of the fourth through hole is provided in the communicating portion, the other end is provided in the threaded portion, the communicating portion is fixedly provided in the second end of the seal tube, the limiting portion abuts against the orifice of the second end of the seal tube, and the threaded portion is screwed with the transmission case.
5. The transmission breather of claim 4, wherein the threaded portion is provided with a groove, and an O-ring is cooperatively disposed on the groove, and the O-ring is adjacent to the limiting portion.
6. A gearbox comprising a gearbox breather according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110787284.3A CN113719602B (en) | 2021-07-13 | 2021-07-13 | Gearbox ventilation device and gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110787284.3A CN113719602B (en) | 2021-07-13 | 2021-07-13 | Gearbox ventilation device and gearbox |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113719602A CN113719602A (en) | 2021-11-30 |
| CN113719602B true CN113719602B (en) | 2024-01-16 |
Family
ID=78673154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110787284.3A Active CN113719602B (en) | 2021-07-13 | 2021-07-13 | Gearbox ventilation device and gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113719602B (en) |
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2021
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|---|---|
| CN113719602A (en) | 2021-11-30 |
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