CN107165945B - Gear box and bearing sealing mechanism - Google Patents
Gear box and bearing sealing mechanism Download PDFInfo
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- CN107165945B CN107165945B CN201710606072.4A CN201710606072A CN107165945B CN 107165945 B CN107165945 B CN 107165945B CN 201710606072 A CN201710606072 A CN 201710606072A CN 107165945 B CN107165945 B CN 107165945B
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- labyrinth
- bearing
- slinger
- oil
- sealing
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/80—Labyrinth sealings
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The application discloses a gear box and a bearing sealing mechanism, wherein the bearing sealing mechanism comprises a bearing seat, a labyrinth ring and a labyrinth end cover, the labyrinth end cover is connected to the bearing seat, the labyrinth ring is provided with a labyrinth oil slinger, and a labyrinth sealing structure is formed between the labyrinth oil slinger and the labyrinth end cover; the outer peripheral surface of the labyrinth ring is provided with a first oil retainer; the inner peripheral surface of the bearing seat is provided with a second oil retainer, and the inner peripheral surface of the second oil retainer is in close contact fit with the outer peripheral surface of the first oil retainer; and a space for yielding is formed between the outer peripheral surface of the labyrinth oil slinger and the inner peripheral surface of the bearing seat, the labyrinth oil slinger is used for axially moving into the labyrinth oil slinger along the bearing seat, and the axial moving distance of the labyrinth oil slinger is larger than the distance between the radial plane of the sealing ring and the outer end surface of the gear box body. Because the second oil slinger can axially move into the abdication space, the labyrinth oil slinger does not limit the axial outward movement of the bearing seat, and the sealing ring can be exposed out of the gear box body, so that the gear box is convenient to replace the sealing ring in a narrow space.
Description
Technical Field
The invention relates to the technical field of bearing sealing, in particular to a bearing sealing mechanism. And also relates to a gear box using the bearing sealing mechanism.
Background
The gear box is an important transmission device of the vehicle, the gear box is arranged on an axle, one end of the gear box is close to wheels, and the other end of the gear box is connected with a driving motor through a coupler. The gear box is connected with the axle through a bearing, and bearing lubricating oil is sealed through a bearing sealing mechanism, and taking a rail transit gear box as an example, the bearing sealing mechanism adopts non-contact labyrinth sealing due to high running speed and severe running environment working condition of the rail transit gear box so as to prevent high-speed abrasion of the bearing sealing mechanism.
The existing bearing sealing mechanism is shown in fig. 1 and 2, a bearing 04 is fixed on a gear box body 01 through a bearing seat 03, a sealing ring 02 is arranged between the bearing seat 03 and a mounting surface of the gear box body 01, a labyrinth ring 06 and a labyrinth end cover 05 are arranged on the outer sides of the bearing 04 and the bearing seat 03, the labyrinth ring 06 rotates along with an axle, the labyrinth end cover 05 is statically fixed on the outer end surface of the bearing seat 03, a bearing seat oil slinger 031 is arranged on the inner peripheral surface of the bearing seat 03, a labyrinth oil slinger 061 is arranged on the outer peripheral surface of the labyrinth ring 06, and the bearing seat oil slinger 031, the labyrinth oil slinger 061 and the labyrinth end cover 05 are sequentially arranged from inside to outside along the axial direction of the bearing 04, wherein the tail end of the bearing seat oil slinger 031 radially extends to be close to the outer peripheral surface of the labyrinth ring 06, a plurality of annular grooves are arranged on the outer peripheral surface of the labyrinth oil slinger 061, and a return-shaped labyrinth is arranged on the outer peripheral surface of the labyrinth oil slinger 061; the inner end surface of the labyrinth end cover 05 is provided with a second square-shaped sealing structure which is in non-contact rotary sealing fit with the square-shaped labyrinth structure of the labyrinth oil slinger 061. In the bearing sealing mechanism, the bearing seat oil retainer 031 forms a first seal of the bearing 04, and the back-shaped sealing structure of the labyrinth oil retainer 061 and the second back-shaped sealing structure of the labyrinth end cover 05 are mutually matched to form a second seal of the bearing 04, so that the sealing of the bearing 04 is ensured, foreign matters such as external dust, moisture and the like are prevented from entering a gear box body, and meanwhile, leakage of gear box lubricating oil is also prevented.
Although this bearing seal mechanism can achieve a good seal, it presents a number of inconveniences in the actual maintenance of the gearbox. After the sealing ring 02 between the bearing seat 03 and the mounting surface of the gear case 01 is used for a long time, an aging phenomenon occurs, the sealing effect is poor, and the sealing ring 02 needs to be replaced, so that the labyrinth end cover 05 and the labyrinth ring 06 need to be detached from the axle, the bearing seat 03 is moved out of the gear case 01 for a certain distance in the axial direction, and the sealing ring 02 on the bearing seat 03 is exposed out of the gear case 01 and then replaced. However, if the wheel is not disassembled, the labyrinth ring 06 cannot be thermally retracted and thermally assembled from the axle under the condition that the space around the gearbox is insufficient and the labyrinth ring 06 is sleeved on the axle, and the bearing seat 03 cannot be moved only by virtue of the axial clearance between the bearing seat 03 and the labyrinth ring 06, so that the bearing seat 03 cannot obtain enough movement space because the movement of the bearing seat oil slinger 031 is limited by the axial direction of the labyrinth oil slinger 061, and the rubber sealing ring 02 on the bearing seat 03 cannot be exposed out of the gearbox casing 01, so that the sealing ring 02 cannot be replaced. Therefore, the conventional bearing sealing mechanism can replace the sealing ring only by first removing the wheel and removing the labyrinth ring 06. The maintenance of the gear box is complicated, the maintenance is inconvenient, and the safety service life of the wheels can be influenced by frequently disassembling the wheels.
In summary, how to solve the problem of inconvenient maintenance of the gear box under the condition of narrow external space of the gear box becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a bearing seal mechanism that facilitates maintenance of a gear box in a case where the space outside the gear box is small.
Another object of the present invention is to provide a gear box using the bearing sealing mechanism, so as to facilitate maintenance of the gear box in the case of a narrow external space of the gear box.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the bearing sealing mechanism comprises a bearing seat, a labyrinth ring and a labyrinth end cover, wherein the labyrinth end cover is connected to the outer end face of the bearing seat, a labyrinth oil slinger is arranged on the outer peripheral face of the labyrinth ring, and a non-contact rotating matched labyrinth sealing structure is formed between the outer end face of the labyrinth oil slinger and the inner end face of the labyrinth end cover;
the outer peripheral surface of the labyrinth ring is also provided with a first oil retainer, and the first oil retainer is positioned between the labyrinth oil retainer and the bearing;
the inner peripheral surface of the bearing seat is also provided with a second oil retainer, and the inner peripheral surface of the second oil retainer is used for being mutually abutted and matched with the outer peripheral surface of the first oil retainer to form a complete bearing oil retainer;
and a yielding space is formed between the outer peripheral surface of the labyrinth oil slinger and the inner peripheral surface of the bearing seat, the yielding space is used for the second oil slinger to move in along the axial direction of the bearing seat, and the axial moving distance of the second oil slinger is larger than the distance between the radial plane where the sealing ring is positioned and the outer end surface of the gear box body.
Preferably, in the bearing sealing mechanism, an annular oil slinger is arranged on the outer peripheral surface of the labyrinth oil slinger at a position close to the inner end surface of the labyrinth end cover.
Preferably, in the bearing sealing mechanism described above, the slinger is adapted to axially restrain the second slinger from moving outwardly.
Preferably, in the bearing seal mechanism described above, an inner peripheral surface of the second slinger is located between an inner ring and an outer ring of the bearing in a radial direction of the bearing housing.
In the bearing sealing mechanism, preferably, an inner peripheral surface of the second slinger is provided with a flange bent toward the bearing side.
Preferably, in the bearing sealing mechanism described above, the labyrinth sealing structure includes:
one or more first annular seal grooves arranged on the outer end surface of the labyrinth slinger;
and one or more second annular sealing grooves which are arranged on the inner end surface of the labyrinth end cover and are in mutual rotation fit sealing fit with the first annular sealing groove.
The invention also provides a gear box, which comprises a gear box body, a bearing and a bearing sealing mechanism, wherein the outer ring of the bearing is connected to the gear box body through a bearing seat of the bearing sealing mechanism, a sealing ring mounting groove is formed in the peripheral mounting surface of the bearing seat, a sealing ring is embedded in the sealing ring mounting groove, and the bearing sealing mechanism is the bearing sealing mechanism according to any one of the above.
Preferably, in the above gear box, a positioning boss axially positioned with an outer end face of the gear box body is further provided on an outer periphery of the bearing block.
Preferably, in the above gear case, a bearing play adjusting spacer is further provided between an inner end surface of the positioning boss and an outer end surface of the gear case.
Preferably, in the above gear box, the seal ring is an O-ring seal.
Compared with the prior art, the invention has the beneficial effects that:
in the bearing sealing mechanism provided by the invention, the first oil retainer and the labyrinth oil retainer are arranged on the outer peripheral surface of the labyrinth ring, the first oil retainer is positioned between the labyrinth oil retainer and the bearing, the second oil retainer is arranged on the inner peripheral surface of the bearing seat, the inner peripheral surface of the second oil retainer is used for being mutually in close fit with the outer peripheral surface of the first oil retainer, and the first oil retainer and the second oil retainer form a complete bearing oil retainer; and a yielding space is formed between the outer peripheral surface of the labyrinth oil slinger and the inner peripheral surface of the bearing seat, so that the second oil slinger can move into the labyrinth oil slinger along the axial direction of the bearing seat, and the axial moving distance of the second oil slinger is larger than the distance between the radial plane of the sealing ring and the outer end surface of the gear box body. When the sealing ring is replaced, only the bearing seat and the labyrinth end cover need to be moved outwards along the axial direction, and as the second oil slinger can enter the yielding space formed between the labyrinth oil slinger and the bearing seat in the axial movement process, the labyrinth oil slinger can not limit the axial outward movement of the bearing seat any more, and the moving distance of the bearing seat can enable the sealing ring to be exposed out of the gear box body, so that the sealing ring is convenient to replace, and wheels positioned outside the gear box do not need to be disassembled, namely, under the condition that the external space of the gear box is narrow, the maintenance of the gear box is facilitated, the frequent disassembly and assembly of the wheels are avoided, and the safe service life of the wheels is ensured. And the bearing oil retainer consisting of the first oil retainer and the second oil retainer is used as a first seal of the bearing, and a labyrinth seal structure formed between the labyrinth oil retainer and the labyrinth end cover is used as a second seal, so that the tightness of the bearing seal mechanism is ensured.
The gear box provided by the invention adopts the bearing sealing mechanism, so that the sealing ring between the bearing seat of the gear box and the gear box body can be conveniently replaced under the condition that the external space of the gear box is narrow, and the maintenance of the gear box is convenient.
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 required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a prior art bearing seal mechanism;
FIG. 2 is a schematic view of the movement of a bearing housing of a bearing seal mechanism of the prior art;
FIG. 3 is a schematic view of a partial structure of a bearing seal mechanism according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating movement of a bearing seat of a bearing sealing mechanism according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a gearbox according to an embodiment of the present invention.
Wherein 01 is a gear box body, 02 is a sealing ring, 03 is a bearing seat, 031 is a bearing seat oil slinger, 04 is a bearing, 05 is a labyrinth end cover, 06 is a labyrinth ring, 061 is a labyrinth oil slinger;
the gear box comprises a gear box body 1, a sealing ring 2, a bearing seat 3, a second oil retainer 31, a positioning boss 32, a bearing 4, a labyrinth end cover 5, a second annular sealing groove 51, a labyrinth ring 6, a labyrinth oil slinger 61, an oil slinger 611, a first annular sealing groove 612, a first oil slinger 62, a bearing clearance adjusting gasket 7 and a relief space 8.
Detailed Description
The invention provides a bearing sealing mechanism which can be used for conveniently maintaining a gear box under the condition that the external space of the gear box is narrow.
The invention also provides a gear box using the bearing sealing mechanism, which can facilitate maintenance of the gear box under the condition that the external space of the gear box is narrow.
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.
Referring to fig. 3 and 4, an embodiment of the present invention provides a bearing sealing mechanism, which includes a bearing housing 3, a labyrinth ring 6, and a labyrinth end cap 5. The outer ring of the bearing 4 is arranged on the gear box body 1 through a bearing seat 3, and a sealing ring 2 is arranged between the bearing seat 3 and the installation surface of the gear box body 1; the labyrinth end cover 5 is connected to the outer end surface of the bearing seat 3, a labyrinth oil slinger 61 is arranged on the outer peripheral surface of the labyrinth ring 6, and a non-contact rotating fit labyrinth sealing structure is formed between the outer end surface of the labyrinth oil slinger 61 and the inner end surface of the labyrinth end cover 5;
the outer peripheral surface of the labyrinth ring 6 is also provided with a first oil retainer 62, and the first oil retainer 62 is positioned between the labyrinth oil retainer 61 and the bearing 4;
the inner peripheral surface of the bearing seat 3 is also provided with a second oil retainer 31, the inner peripheral surface of the second oil retainer 31 is used for being mutually in close fit with the outer peripheral surface of the first oil retainer 62, the first oil retainer 62 and the second oil retainer 31 can move relatively along the axial direction, and the first oil retainer 61 and the second oil retainer 32 form a complete bearing oil retainer to be used as a first seal of the bearing 4;
a relief space 8 is formed between the outer peripheral surface of the labyrinth slinger 61 and the inner peripheral surface of the bearing housing 3, i.e. a certain distance exists between the outer peripheral surface of the labyrinth slinger 61 and the inner peripheral surface of the bearing housing 3, the relief space 8 is used for the second slinger 31 to move into along the axial direction of the bearing housing 3, i.e. the labyrinth slinger 61 does not block the axial movement of the second slinger 31, the axial movement distance of the second slinger 31 is larger than the distance between the radial plane of the sealing ring 2 and the outer end surface of the gear housing 1, and the axial movement distance of the second slinger 31 is equal to the sum of the axial distance of the relief space 8 plus the distance between the outer end surface of the second slinger 31 and the inner end surface of the labyrinth slinger 61 in the assembled state, i.e. the bearing housing 3 and the second slinger 31 together move axially relative to the labyrinth ring 6, and when the second slinger 31 enters the relief space, the sealing ring 2 can be exposed from the gear housing 1.
The working principle and working process of the bearing sealing mechanism are as follows: in the assembled state of the bearing sealing mechanism, as shown in fig. 3, the outer peripheral surface of the first oil retainer 62 is abutted against the inner peripheral surface of the second oil retainer 31 to form a complete bearing oil retainer, the labyrinth sealing structure formed between the outer end surface of the labyrinth oil retainer 61 and the inner end surface of the labyrinth end cover 5 is in a non-contact rotary sealing fit state, and the sealing ring 2 is positioned between the bearing seat 3 and the mounting surface of the gear housing 1. When the seal ring 2 needs to be replaced, the bearing seat 3 is moved axially toward the outer end of the gear housing 1, as shown in fig. 4, since the second oil slinger 31 is disposed on the bearing seat 3 and the labyrinth end cover 5 is connected to the outer end face of the bearing seat 3, the second oil slinger 31 and the labyrinth end cover 5 move axially toward the outer end together with the bearing seat 3, at this time, the position of the labyrinth ring 6 is fixed, the second oil slinger 31 is gradually staggered from the first oil slinger 62, and since the labyrinth oil slinger 61 does not limit the axial movement of the second oil slinger 31, the second oil slinger 31 can enter a yielding space 8 formed between the labyrinth oil slinger 61 and the bearing seat 3, and after moving in place, the seal ring 2 disposed on the bearing seat 3 is exposed out of the gear housing 1, so that the seal ring 2 can be replaced.
It can be seen that the bearing oil slinger is divided into the first oil slinger 62 and the second oil slinger 31, and the abdication space 8 is formed between the labyrinth oil slinger 61 and the bearing seat 3, so that the axial limit of the labyrinth ring 6 to the bearing seat 3 can be relieved, the axial moving distance of the bearing seat 3 in the bearing sealing mechanism is increased under the condition that the axial lengths of the bearing sealing mechanism and the gear box are not increased, and the sealing ring 2 can be conveniently replaced under the condition of a narrow space outside the gear box. The sealing ring 2 on the side, close to the wheels, of the gearbox can be replaced without disassembling the wheels, so that the safe service life of the wheels is ensured. Meanwhile, the bearing sealing mechanism ensures good sealing of the bearing 4 by taking the bearing oil retainer consisting of the first oil retainer 62 and the second oil retainer 31 as a first seal and taking the bearing oil retainer as a second seal.
Further, in this embodiment, the outer peripheral surface of the labyrinth slinger 61 is provided with an annular slinger 611 at a position close to the inner end surface of the labyrinth end cover 5, and compared with the arrangement of a plurality of annular grooves on the outer peripheral surface of the labyrinth slinger 061 in the prior art, the annular slinger 611 in this embodiment is a single-side annular groove, i.e. the slinger can realize the slinger function, and meanwhile, the axial movement of the second slinger 31 is not limited, and the axial movement distance of the bearing seat 3 is increased. Of course, the oil slinger 61 may not be provided, and only the sealing bearing 4 may be provided.
Still further, in this embodiment, the oil slinger 611 is disposed at a position capable of limiting the axial movement of the second oil slinger 31, and when the second oil slinger 31 enters the relief space 8, the second oil slinger 31 contacts with the oil slinger 611 to limit the movement of the second oil slinger 31 to the outer end. Of course, the position of the oil slinger 611 may not limit the axial movement of the second oil slinger 31, and whether the oil slinger 611 and the second oil slinger 31 can contact and limit the axial movement of the bearing seat 3 by manually controlling the movement distance depends on the axial dimensions of the second oil slinger 31 and the labyrinth oil slinger 61.
As shown in fig. 3 and 4, preferably, in the present embodiment, the inner peripheral surface of the second slinger 31 is located between the inner race and the outer race of the bearing 4 in the radial direction of the bearing housing 3. I.e. from the outside to the inside in the radial direction of the bearing housing 3, the radial position of the inner peripheral surface of the second slinger 31 is higher than the radial position of the outer ring of the bearing 4, which is arranged to determine a suitable level of lubricant oil, ensuring that no excessive or insufficient lubricant is provided to the bearing 4, to increase the service life of the bearing 4.
As an optimization, in this embodiment, the inner peripheral surface of the second oil retainer 31 is provided with an oil retaining flange that is bent toward the bearing 4 side, and an oil retaining groove is formed between the oil retaining flange and the inner end surface of the second oil retainer 31, so that a certain amount of lubricating oil can be contained and stored, thereby further improving the service life of the bearing 4. Of course, the inner end surface of the second oil retainer 31 may have a planar structure, and the first oil retainer 62 may have the same structure as the second oil retainer 31, or may have different structures, so long as the first oil retainer and the second oil retainer are able to be mutually abutted and matched to form a complete bearing oil retainer.
As shown in fig. 3 and 4, the present embodiment provides a specific labyrinth seal structure, which specifically includes: one or more first annular seal grooves 612 are provided on the outer end surface of the labyrinth slinger 61; one or more second annular sealing grooves 51 are arranged on the inner end face of the labyrinth end cover 5, the second annular sealing grooves 51 are in mutual rotation fit and sealing fit with the first annular sealing grooves 612, and the first annular sealing grooves 612 and the second annular sealing grooves 51 are fit together and are not in contact, and can relatively rotate to form a bent labyrinth structure. The labyrinth sealing structure has good sealing performance. Of course, the labyrinth seal structure may be other structures as long as it can achieve non-contact rotary seal, and is not limited to the structural forms listed in the present embodiment.
Based on the bearing sealing mechanism described in any of the above embodiments, the embodiment of the present invention further provides a gear box, as shown in fig. 3-5, where fig. 3 and fig. 4 are partial schematic structural views of a region a in fig. 5, and the gear box includes a gear box body 1, a bearing 4, and a bearing sealing mechanism. The bearing sealing mechanism is as described in any embodiment, bearings 4 are arranged at two ends of the gear box, an outer ring of each bearing 4 is connected to the gear box body 1 through a bearing seat 3 of the bearing sealing mechanism, a sealing ring mounting groove is formed in a peripheral mounting surface of the bearing seat 3, and a sealing ring is embedded in the sealing ring 2 mounting groove.
When the gear box needs to be maintained and the sealing ring 2 is replaced, the bearing seat 3 only needs to be moved to the outer end of the gear box along the axial direction by a certain distance, and due to the adoption of the bearing sealing mechanism in the application, the moving distance of the bearing seat 3 in the bearing sealing mechanism can be increased under the condition that the installation position of the sealing ring 2 is not changed and the axial size of the bearing sealing mechanism is increased, so that the sealing ring 2 is exposed out of the gear box body 1, and the sealing ring 2 is convenient to replace. The gearbox can be used for conveniently replacing the sealing ring 2 under the condition that the external space is narrow, and the wheel can be prevented from being dismounted when the sealing ring 2 is replaced on one side close to the wheel, so that the frequent dismounting and mounting of the wheel are avoided, and the safe service life of the wheel is ensured. In particular, for the rail transit gearbox, the maintenance of the rail transit gearbox with a narrow external space can be conveniently performed.
Further, as shown in fig. 3 and 4, in the present embodiment, the outer periphery of the bearing housing 3 is further provided with a positioning boss 32 axially positioned with the outer end face of the gear housing 1 for positioning the axial positions of the bearing housing 3 and the bearing housing 1 at the time of assembly, facilitating assembly positioning.
Furthermore, in this embodiment, a bearing play adjusting spacer 7 is further disposed between the inner end surface of the positioning boss 32 and the outer end surface of the gear housing 1, and the assembly position of the outer ring and the inner ring of the bearing 4 can be adjusted by the bearing play adjusting spacer 7, so as to facilitate adjustment of the installation accuracy of the bearing 4. Needless to say, the inner end surface of the positioning boss 32 may be directly attached to the outer end surface of the gear housing 1 without providing the bearing play adjusting shim 7, so long as the accuracy of the attachment of the bearing 4 can be ensured.
In the embodiment, the sealing ring 2 is an O-shaped sealing ring, is suitable for static sealing or low-speed relative motion sealing, and has good sealing effect. Of course, the sealing ring 2 may also be other types of sealing rings, such as rectangular sealing rings, etc.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The bearing sealing mechanism comprises a bearing seat (3), a labyrinth ring (6) and a labyrinth end cover (5), wherein the labyrinth end cover (5) is connected to the outer end face of the bearing seat (3), a labyrinth oil slinger (61) is arranged on the outer peripheral face of the labyrinth ring (6), and a non-contact rotating fit labyrinth sealing structure is formed between the outer end face of the labyrinth oil slinger (61) and the inner end face of the labyrinth end cover (5);
the labyrinth structure is characterized in that a first oil retainer (62) is further arranged on the outer peripheral surface of the labyrinth ring (6), and the first oil retainer (62) is positioned between the labyrinth oil retainer (61) and the bearing (4);
the inner peripheral surface of the bearing seat (3) is also provided with a second oil retainer (31), and the inner peripheral surface of the second oil retainer (31) is used for being mutually abutted and matched with the outer peripheral surface of the first oil retainer (62) to form a complete bearing oil retainer;
a relief space (8) is formed between the outer peripheral surface of the labyrinth slinger (61) and the inner peripheral surface of the bearing seat (3), the second slinger (31) is used for entering along the axial movement of the bearing seat (3), the distance of the axial movement of the second slinger (31) is larger than the distance between the radial plane of the sealing ring (2) and the outer end surface of the gear box body (1), and the axial movement distance of the second slinger (31) is equal to the sum of the axial distance of the relief space (8) and the distance between the outer end surface of the second slinger (31) and the inner end surface of the labyrinth slinger (61) in the assembled state;
the outer peripheral surface of the labyrinth oil slinger (61) is provided with an annular oil slinger (611) at a position close to the inner end surface of the labyrinth end cover (5), and the oil slinger (611) is used for axially limiting the second oil slinger (31) to move towards the outer end.
2. Bearing sealing mechanism according to claim 1, wherein the inner circumferential surface of the second slinger (31) is located between the inner ring and the outer ring of the bearing (4) in the radial direction of the bearing housing (3).
3. The bearing seal mechanism according to claim 1, wherein an inner peripheral surface of the second slinger (31) is provided with an oil deflector flange bent toward the bearing (4) side.
4. The bearing seal mechanism of claim 1, wherein the labyrinth seal structure comprises:
one or more first annular seal grooves (612) provided on the outer end surface of the labyrinth slinger (61);
and one or more second annular sealing grooves (51) which are arranged on the inner end surface of the labyrinth end cover (5) and are in mutual rotation fit sealing fit with the first annular sealing groove (612).
5. A gear box, comprising a gear box body (1), a bearing (4) and a bearing sealing mechanism, wherein an outer ring of the bearing (4) is connected to the gear box body (1) through a bearing seat (3) of the bearing sealing mechanism, a sealing ring mounting groove is arranged on a peripheral mounting surface of the bearing seat (3), and a sealing ring (2) is embedded in the sealing ring mounting groove, and the gear box is characterized in that the bearing sealing mechanism is as claimed in any one of claims 1-4.
6. Gearbox according to claim 5, characterised in that the outer circumference of the bearing housing (3) is also provided with a positioning boss (32) axially positioned with the outer end face of the gearbox casing (1).
7. Gearbox according to claim 6, characterised in that a bearing play adjustment shim (7) is also provided between the inner end face of the positioning boss (32) and the outer end face of the gearbox casing (1).
8. Gearbox according to claim 5, characterized in that the sealing ring (2) is an O-ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710606072.4A CN107165945B (en) | 2017-07-24 | 2017-07-24 | Gear box and bearing sealing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710606072.4A CN107165945B (en) | 2017-07-24 | 2017-07-24 | Gear box and bearing sealing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165945A CN107165945A (en) | 2017-09-15 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412319A (en) * | 2018-12-21 | 2019-03-01 | 卧龙电气南阳防爆集团股份有限公司 | The fast heavy-duty motor of a kind of low noise, cooling |
| CN110883603A (en) * | 2019-12-26 | 2020-03-17 | 安徽新诺精工股份有限公司 | Machine tool bearing protection structure |
| CN112145700B (en) * | 2020-10-21 | 2024-06-14 | 张家港市兰航机械有限公司 | Sealing structure of kneader |
| CN112943900B (en) * | 2021-01-28 | 2022-05-31 | 中车青岛四方机车车辆股份有限公司 | Protector for replacing oil scraper ring, disassembling and assembling platform and oil scraper ring replacing method |
| CN113187880B (en) * | 2021-05-07 | 2024-05-07 | 太原重工股份有限公司 | Sealing end cover for tilting device gear box |
| CN114673729B (en) * | 2022-01-30 | 2023-11-24 | 山东省章丘鼓风机股份有限公司 | Combined labyrinth sealing structure for bearing pedestal |
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| TW201437518A (en) * | 2013-03-19 | 2014-10-01 | Harmonic Drive Systems | Wave gear device and hollow rotating actuator |
| CN205639569U (en) * | 2016-04-07 | 2016-10-12 | 北京康为重工机械制造有限公司 | Output shaft end seal structure , high -speed gear box and use its rail vehicle |
| CN205956239U (en) * | 2016-08-23 | 2017-02-15 | 江苏新瑞齿轮系统有限公司 | Track shaft coupling |
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| JP4685248B2 (en) * | 2001-02-05 | 2011-05-18 | 光洋シーリングテクノ株式会社 | Oil seal |
| DE102009055647B4 (en) * | 2009-11-24 | 2019-04-18 | Schaeffler Technologies AG & Co. KG | Installation procedure of a cartridge seal in a radial bearing |
| US8790014B2 (en) * | 2010-04-08 | 2014-07-29 | Ntn Corporation | Bearing device for axle of railway vehicle |
| CN201901158U (en) * | 2010-12-20 | 2011-07-20 | 南车戚墅堰机车车辆工艺研究所有限公司 | Urban rail vehicle gearbox sealing structure |
| CN102954194B (en) * | 2011-08-30 | 2015-04-22 | 常州市瑞泰工程机械有限公司 | Railway vehicle traveling gearbox sealing structure |
| CN103671852B (en) * | 2012-09-13 | 2016-07-06 | 南车戚墅堰机车车辆工艺研究所有限公司 | High gear box seal device and apply the high-speed gear box of this device |
| CN204357952U (en) * | 2014-12-18 | 2015-05-27 | 浙江皇冠电动工具制造有限公司 | Angle grinding machine bearing gland formula labyrinth dustproof construction |
| CN206918094U (en) * | 2017-07-24 | 2018-01-23 | 江苏新瑞齿轮系统有限公司 | A kind of gear-box and bearing sealing device |
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| TW201437518A (en) * | 2013-03-19 | 2014-10-01 | Harmonic Drive Systems | Wave gear device and hollow rotating actuator |
| CN205639569U (en) * | 2016-04-07 | 2016-10-12 | 北京康为重工机械制造有限公司 | Output shaft end seal structure , high -speed gear box and use its rail vehicle |
| CN205956239U (en) * | 2016-08-23 | 2017-02-15 | 江苏新瑞齿轮系统有限公司 | Track shaft coupling |
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| CN107165945A (en) | 2017-09-15 |
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