CN107725610A - A kind of sealing ring and the bearing using the sealing ring - Google Patents
A kind of sealing ring and the bearing using the sealing ring Download PDFInfo
- Publication number
- CN107725610A CN107725610A CN201710947891.5A CN201710947891A CN107725610A CN 107725610 A CN107725610 A CN 107725610A CN 201710947891 A CN201710947891 A CN 201710947891A CN 107725610 A CN107725610 A CN 107725610A
- Authority
- CN
- China
- Prior art keywords
- hole
- annular base
- annular
- sealing ring
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
-
- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A kind of bearing the invention provides sealing ring and using the sealing ring, wherein sealing ring includes annular base, the close outward flange opening position of the annular base be provided with axially through through hole, hole curtain also is provided with opening position corresponding with through hole on the medial surface of annular base, the exhaust passage between hole curtain and annular base with through hole described in radial communication.The sealing ring of the present invention is provided with hole curtain in through hole, pass through blocking for hole curtain, the lubricant grease being thrown on sealing ring is stopped by hole curtain, it is back in bearing bore body, high temperature, gases at high pressure can discharge from exhaust passage and through hole, and gas outlet realizes oil, vapour separation function, add lubricating life, bearing internal external remains good and breathed freely that bearing cooling effect is notable, and temperature rise is low simultaneously.
Description
Technical field
The present invention relates to field of bearings, more particularly to a kind of sealing ring and the bearing using the sealing ring.
Background technology
High speed and ultrahigh speed sealed bearings use conventional contactless sealing structure at present, as Authorization Notice No. is
A kind of sealed bearings disclosed in CN205331239U Chinese utility model patent, have small between sealing ring and inner ring groove
Seal clearance（About 0.02mm）, the inner ring contact of sealing ring and rotation at a high speed is avoided, is advantageous to bearing and runs at high speed, but this moistens
Problems be present in sliding mode：（1）Bearing runs at high speed, and under the action of the centrifugal force, lubricating grease is largely thrown to sealing ring and axle
The space position between inner ring is held, it is most of to be flowed out by the seal clearance of sealing ring and bearing inner race part, form lubricating grease and let out
Dew, substantially reduces lubricating life；（2）When bearing is stopped, the lubricating grease of partial failure is deposited at seal clearance through cooling,
Or be strongly adhered on inner ring, seal clearance is blocked, friction is formed when bearing operates again, or seal clearance is reduced,
It is unfavorable for high-speed bearing radiating；（3）This sealing structure, seal clearance be both air inlet, were also gas outlets, and air-flow exchanges slowly,
Bearing heating is not easy to spread out of, and cooling effect is bad；（4）This sealing result, in the space between sealing ring and the inside and outside circle of bearing
High pressure is formed, high-pressure area is concentrated near rolling element, and lubricating grease is difficult sufficient lubrication rolling element, reduces bearing lubrication effect
Fruit.
In addition, the Chinese utility model patent that Authorization Notice No. is CN206377157U discloses the axle with degassing function
Sealing ring is held, this bearing sealed ring is connected by outer lip with bearing outer ring, is coordinated by interior sealing lip and bearing inner race sealing,
Be additionally provided with the middle part of sealing ring axially through passage, bearing internal pressure pressure balance is realized by passage.It is but this logical
Stomata is arranged in the middle part of sealing ring, typically small, during bearing operation, is easy to when lubricant grease is thrown on sealing ring
To be ventilated hole plug, and cause that passage can not be well is ventilative.
The content of the invention
It is an object of the invention to provide one kind to seal the preferable seal ring of shaft bearing of air permeable effect；Meanwhile the present invention is also
Provide a kind of bearing using the sealing ring.
To achieve the above object, the technical scheme 1 of sealing ring of the invention is：A kind of sealing ring, including annular base, institute
State annular base close outward flange opening position be provided with axially through through hole, on the medial surface of annular base also with through hole pair
The opening position answered is provided with hole curtain, has the exhaust passage of through hole described in radial communication between hole curtain and annular base.
The sealing ring of the present invention is provided with hole curtain, by blocking for hole curtain, the lubricating oil being thrown on sealing ring in through hole
Fat is stopped by hole curtain, is back in bearing bore body, and high temperature, gases at high pressure can discharge from exhaust passage and through hole, outlet cause for gossip
Show oil, vapour separation function, add lubricating life, while bearing internal external remains good ventilative, bearing cooling effect
Significantly, temperature rise is low.
On the basis of technical scheme 1, can further limit to obtain technical scheme 2, i.e., described through hole have it is multiple, and around
The center circular array arrangement of annular base, bearing is so enabled to uniformly to be vented in circumferential direction, Homogeneouslly-radiating.
On the basis of technical scheme 2, it can further limit to obtain technical scheme 3, i.e., the inner side of described annular base
The annular shirt rim radially to overhang is connected with face, there is interval between annular shirt rim and annular base medial surface, annular shirt rim will
Through hole blocks in the axial direction, and the part corresponding to each through hole of annular shirt rim forms the hole curtain, annular shirt rim and ring-type
Interval between matrix medial surface forms the exhaust passage.The hole curtain of multiple through holes is formed by annular shirt rim, it is simple in construction,
It is easily manufactured.
On the basis of technical scheme 3, it can further limit to obtain technical scheme 4, i.e., described annular shirt rim is from through hole
The outer peripheral side of close annular base radially-inwardly overhang.
On the basis of technical scheme 3 or 4, it can further limit to obtain technical scheme 5, i.e., described exhaust passage is curved
Passage is rolled over, so can effectively avoid the lubricant grease of Bearing inner from leaking outside.
On the basis of technical scheme 5, it can further limit to obtain technical scheme 6, i.e., described exhaust passage is in axial direction
Direction is bent, and is so easy to the setting of exhaust passage.
On the basis of technical scheme 6, it can further limit to obtain technical scheme 7, i.e., the inner side of described annular base
Annular gear edge, the side towards annular base of annular shirt rim are also provided with face in the side of the close annular base inward flange of through hole
Face is in the side of the close annular base inward flange on annular gear edge towards annular base evagination so as to forming the bent passage.
On the basis of technical scheme 3 or 4, can also further limit to obtain technical scheme 8, i.e., described annular base with
Annular shirt rim is wholely set.
The technical scheme 1 of bearing of the present invention is：A kind of roller between bearing, including inner ring, outer ring and Internal and external cycle,
Sealing ring also is being installed at endface position on the medial surface of the outer ring, the sealing ring includes annular base, described
The close outward flange opening position of annular base be provided with axially through through hole, also corresponding with through hole on the medial surface of annular base
Opening position be provided with hole curtain, between hole curtain and annular base have through hole described in radial communication exhaust passage.
Sealing ring is provided with hole curtain in through hole used by the bearing of the present invention, by blocking for hole curtain, is thrown to sealing
Lubricant grease on circle is stopped by hole curtain, is back in bearing bore body, and high temperature, gases at high pressure can be arranged from exhaust passage and through hole
Go out, gas outlet realizes oil, vapour separation function, adds lubricating life, while bearing internal external remains good ventilative, axle
It is notable to hold cooling effect, temperature rise is low.
On the basis of technical scheme 1, can further limit to obtain technical scheme 2, i.e., described through hole have it is multiple, and around
The center circular array arrangement of annular base, bearing is so enabled to uniformly to be vented in circumferential direction, Homogeneouslly-radiating.
On the basis of technical scheme 2, it can further limit to obtain technical scheme 3, i.e., the inner side of described annular base
The annular shirt rim radially to overhang is connected with face, there is interval between annular shirt rim and annular base medial surface, annular shirt rim will
Through hole blocks in the axial direction, and the part corresponding to each through hole of annular shirt rim forms the hole curtain, annular shirt rim and ring-type
Interval between matrix medial surface forms the exhaust passage.The hole curtain of multiple through holes is formed by annular shirt rim, it is simple in construction,
It is easily manufactured.
On the basis of technical scheme 3, it can further limit to obtain technical scheme 4, i.e., described annular shirt rim is from through hole
The outer peripheral side of close annular base radially-inwardly overhang.
On the basis of technical scheme 3 or 4, it can further limit to obtain technical scheme 5, i.e., described exhaust passage is curved
Passage is rolled over, so can effectively avoid the lubricant grease of Bearing inner from leaking outside.
On the basis of technical scheme 5, it can further limit to obtain technical scheme 6, i.e., described exhaust passage is in axial direction
Direction is bent, and is so easy to the setting of exhaust passage.
On the basis of technical scheme 6, it can further limit to obtain technical scheme 7, i.e., the inner side of described annular base
Annular gear edge, the side towards annular base of annular shirt rim are also provided with face in the side of the close annular base inward flange of through hole
Face is in the side of the close annular base inward flange on annular gear edge towards annular base evagination so as to forming the bent passage.
On the basis of technical scheme 3 or 4, can also further limit to obtain technical scheme 8, i.e., described annular base with
Annular shirt rim is wholely set.
On the basis of technical scheme 1 or 2 or 3 or 4, it can also further limit to obtain technical scheme 9, i.e. sealing ring
Between inside edge and inner ring there is gap to coordinate, the gas outlet that the gap is formed as the through hole on air inlet and sealing ring
Coordinate, Bearing inner is formed convection current, the high temperature and high pressure gas of Bearing inner are discharged from gas outlet, outer low temperature low-pressure gas from
Air inlet enters Bearing inner, sealing ring is formed local decompression, edge Bearing inner grease leakage, in axle with inner ring gap location
Hold and grease circulation is formed in inner space, add bearing lubrication effect.
On the basis of technical scheme 1 or 2 or 3 or 4, it can also further limit to obtain technical scheme 10, i.e. outer ring
Both ends are mounted on the sealing ring.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment one of the bearing of the present invention；
Fig. 2 is the schematic diagram of structure at the display through hole and exhaust passage of sealing ring；
Fig. 3 is the schematic diagram of the gas flow direction of the bearing of the present invention；
Fig. 4 is the schematic diagram of the circulation lubrication of the bearing of the present invention.
In figure：1st, outer ring；2nd, inner ring；3rd, retainer；4th, roller；5th, sealing ring；6th, lubricant grease；7th, air inlet；8th, it is close
Seal space；9th, exhaust passage；10th, through hole；11st, outer low temperature low-pressure gas；12nd, internal high temperature gases at high pressure；13rd, annular skirt
Side；14th, annular gear edge.
Embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment of the bearing of the present invention, as shown in Figures 1 to 4, including inner ring 2, outer ring 1 and inside and outside circle
Between roller 4, roller 4 pass through retainer 3 keep relative spacing.It is separately installed with the inside of the close end positions of outer ring 1 close
Seal 5, the outer peripheral face gap of sealing ring 5 and bearing inner race 2 coordinate.
Sealing ring 5 includes annular base, on annular base close to outward flange opening position be provided with axially through through hole 10.
Through hole 10 has multiple and uniform intervals are set in a circumferential direction, around the center circular array arrangement of annular base.Cyclic group
The annular shirt rim 13 radially to overhang is additionally provided with the medial surface of body, the outer ledge of annular shirt rim 13 is integrally set with annular base
Put, and radially-inwardly overhang from the outer peripheral side of close annular base of through hole 10.Annular shirt rim 13 is interior with annular base
There are certain intervals, and annular shirt rim 13 blocks each through hole 10, forms the hole curtain corresponding to each through hole between side.Ring
Interval between shape shirt rim 13 and annular base medial surface forms the exhaust passage 9 on the inside of communication seals circle with through hole 10.
So, by hole curtain the blocking to through hole 10 formed by annular shirt rim 13, the lubrication being thrown on sealing ring 5
Grease 6 will not enter through hole and block through hole, and can be back to along hole curtain in bearing bore body, otherwise Bearing inner sealing space 8
Interior high temperature and high pressure gas can discharge from exhaust passage and through hole 10 to Bearing outer, and through hole realizes oil and gas with exhaust passage
The function of separation, the high temperature water gas mixture for avoiding being formed after high-speed bearing internal lubrication fat effectively lubricating can not exclude in time and
Pair also it is not engaged in lubricating the influence of the lubricating grease of work, adds lubricating life.Bearing internal external remains good simultaneously
Ventilative, bearing cooling effect is notable, and temperature rise is low.
Further, exhaust passage 9 is bent passage, so can effectively avoid the profit in Bearing inner sealing space 8
Lubricating oil fat 6 leaks outside.Specifically when setting, exhaust passage can be bent in the axial direction.In the present embodiment, the medial surface of annular base
On annular gear is also provided with the side of the close annular base inward flange of through hole 10 along 14, annular shirt rim towards annular base
Side is in side of the annular gear along 14 close annular base inward flange towards annular base evagination so as in annular base and ring
Shape forms bent passage between shirt rim.Certainly, in other embodiments, being also not excluded for exhaust passage can be in radial directions
Bending, but forming this exhaust passage can cause the annular base of sealing ring and annular shirt rim structure complex, be manufactured into
Originally will greatly improve.
Gap between the bearing inner race and sealing ring of the present invention is as air inlet 7, and exhaust passage and through hole are as outlet
Mouthful, both make Bearing inner form good airflow circulating at cooperation.As shown in figure 3, the high temperature and high pressure gas 12 of Bearing inner from
Gas outlet is discharged, and outer low temperature low-pressure gas 11 enters Bearing inner from air inlet, makes sealing ring and inner ring gap location formation office
Portion's negative pressure, so as shown in figure 4, Bearing inner is in the lubricating oil that the gap of sealing ring inward flange and bearing inner race lateral surface goes out
The gas that fat 6 will be entered in bearing inwardly drives, and avoids lubricant grease from being leaked outside from the gap, the shape in bearing interior space
Circulated into grease, add bearing lubrication effect.
Present invention also offers the embodiment two of bearing, the difference of embodiment two and embodiment one is, annular base
The independent flange radially extended is provided with each through hole on medial surface, the flange blocks through hole, forms hole curtain.Wherein,
Spacing between flange and annular base medial surface forms the exhaust passage for connecting through hole.The mode of this single setting of hole curtain,
Also the manufacture difficulty of sealing ring can be increased, it is more troublesome especially in flange and annular base integrally connected.Such case compares
The manufacture that flange is subsequently connected with annular base is adapted to, such as after annular base has been manufactured, by flange bonding or heat
Melt on annular base.
In above two embodiment, hole curtain is either formed by annular shirt rim or flange, the entrance of exhaust passage by
Its interval between annular base is formed, and it is cavernous structure to be also not excluded for exhaust passage in other embodiments, such as
During using hole curtain of the independent flange as each through hole, the both sides of the width of hole curtain can integrally connect with annular base
Connect.
In above-described embodiment, exhaust passage is bent passage, and in other embodiments, exhaust passage can also be straight line
Passage；In above-described embodiment, bent passage is surrounded by the evagination side on annular gear edge and annular shirt rim, in other embodiment
In, the opposite flank of annular shirt rim and annular base can all be waveform, and two wave shaped sides form waveform bent passage.
In above-described embodiment, through hole has multiple and circular array to arrange, is also not excluded for through hole in other embodiments
Although have multiple but not circular array, for example, each through hole surround positive direction centered on the center of annular base, prismatic,
Ellipse, spiral shape etc..
In other Special use occasions, bearing only can also install sealing ring in one end of outer ring.
The embodiment of the sealing ring of the present invention, its concrete structure and the ring structure phase in the embodiment of above-mentioned bearing
Together, here is omitted.
Claims (10)
1. a kind of sealing ring, including annular base, it is characterized in that, the close outward flange opening position of the annular base is provided with axially
The through hole of insertion, be also provided with hole curtain in opening position corresponding with through hole on the medial surface of annular base, hole curtain and annular base it
Between have through hole described in radial communication exhaust passage.
2. sealing ring according to claim 1, it is characterized in that, the through hole has multiple, and is in around the center of annular base
Annular array is arranged.
3. sealing ring according to claim 2, it is characterized in that, it is connected with the medial surface of the annular base and radially overhangs
Annular shirt rim, there is interval between annular shirt rim and annular base medial surface, annular shirt rim blocks through hole in the axial direction,
The part corresponding to each through hole of annular shirt rim forms the hole curtain, the interval between annular shirt rim and annular base medial surface
Form the exhaust passage.
4. sealing ring according to claim 3, it is characterized in that, the annular shirt rim is outside the close annular base of through hole
The side of edge radially-inwardly overhangs.
5. the sealing ring according to claim 3 or 4, it is characterized in that, the exhaust passage is bent passage.
6. sealing ring according to claim 5, it is characterized in that, the exhaust passage is bent in the axial direction.
7. sealing ring according to claim 6, it is characterized in that, also in the close of through hole on the medial surface of the annular base
The side of annular base inward flange is provided with annular gear edge, and the side towards annular base of annular shirt rim is in the close of annular gear edge
The side of annular base inward flange is towards annular base evagination so as to forming the bent passage.
8. the sealing ring according to claim 3 or 4, it is characterized in that, the annular base is wholely set with annular shirt rim.
9. the roller between a kind of bearing, including inner ring, outer ring and Internal and external cycle, also close to end on the medial surface of the outer ring
Face opening position is provided with sealing ring, and the sealing ring includes annular base, it is characterized in that, the close outward flange of the annular base
Opening position be provided with axially through through hole, be also provided with hole curtain, hole in opening position corresponding with through hole on the medial surface of annular base
There is the exhaust passage of through hole described in radial communication between curtain and annular base.
10. bearing according to claim 9, it is characterized in that, the through hole has multiple, and is in ring around the center of annular base
Shape array is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947891.5A CN107725610B (en) | 2017-10-12 | 2017-10-12 | A kind of sealing ring and the bearing using the sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947891.5A CN107725610B (en) | 2017-10-12 | 2017-10-12 | A kind of sealing ring and the bearing using the sealing ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725610A true CN107725610A (en) | 2018-02-23 |
| CN107725610B CN107725610B (en) | 2019-05-31 |
Family
ID=61210378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710947891.5A Active CN107725610B (en) | 2017-10-12 | 2017-10-12 | A kind of sealing ring and the bearing using the sealing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107725610B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008304035A (en) * | 2007-06-11 | 2008-12-18 | Nsk Ltd | Bearing lubrication mechanism and multistage rolling mill |
| JP2009068581A (en) * | 2007-09-12 | 2009-04-02 | Ntn Corp | Bearing |
| CN103629246A (en) * | 2013-09-27 | 2014-03-12 | 浙江蓝翔轴承有限公司 | Double-sealing bearing |
| CN203770416U (en) * | 2014-04-12 | 2014-08-13 | 浙江大裕轴承有限公司 | Bearing dustproof cover |
| CN206246541U (en) * | 2016-12-12 | 2017-06-13 | 人本集团有限公司 | Automobile dual-mass flywheel high sealing is breathed freely bearing |
-
2017
- 2017-10-12 CN CN201710947891.5A patent/CN107725610B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008304035A (en) * | 2007-06-11 | 2008-12-18 | Nsk Ltd | Bearing lubrication mechanism and multistage rolling mill |
| JP2009068581A (en) * | 2007-09-12 | 2009-04-02 | Ntn Corp | Bearing |
| CN103629246A (en) * | 2013-09-27 | 2014-03-12 | 浙江蓝翔轴承有限公司 | Double-sealing bearing |
| CN203770416U (en) * | 2014-04-12 | 2014-08-13 | 浙江大裕轴承有限公司 | Bearing dustproof cover |
| CN206246541U (en) * | 2016-12-12 | 2017-06-13 | 人本集团有限公司 | Automobile dual-mass flywheel high sealing is breathed freely bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107725610B (en) | 2019-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204805344U (en) | Sealed bearing is with sealing washer of taking aerating system | |
| CN204647014U (en) | A kind of inner chamber and the internal diameter Novel double-row tapered roller bearing all with sealing | |
| CN221195766U (en) | Sealing ring structure for improving air pressure in bearing grease lubrication | |
| CN102011746B (en) | Automobile water pump bearing sealing device | |
| CN204403151U (en) | Lift machine is used light and thin type bearing | |
| CN210859602U (en) | Non-maintaining universal joint seal structure with combination formula exhaust hole | |
| CN107725610A (en) | A kind of sealing ring and the bearing using the sealing ring | |
| CN111043160B (en) | Lubricating and dustproof structure and method for spherical bearing | |
| CN209510713U (en) | Labyrinth seal system | |
| US9163558B1 (en) | Complex path design of the flinger and insert | |
| CN201836104U (en) | Automobile water pump bearing sealing device with water thrower | |
| CN107575381A (en) | Screw compressor and air conditioner | |
| CN203285841U (en) | Self-aligning roller bearing | |
| CN208719348U (en) | A kind of anti-beat static seal device of row's epoxy-type | |
| CN201057270Y (en) | Packless seal device | |
| CN202833629U (en) | Rolling bearing with high-property sealing structure | |
| CN202374096U (en) | Sealing structure for motor bearing | |
| CN207513827U (en) | Screw compressor and air conditioner | |
| CN203517250U (en) | Anti-oil-leakage lubricating mechanism applied to bearing | |
| CN207093774U (en) | A kind of divided bearing protects labyrinth gland | |
| CN210068335U (en) | Sealed combined piston ring, piston assembly and internal combustion engine | |
| CN221568835U (en) | Roots vacuum pump with shielding motor | |
| CN103791646A (en) | Drainage-balanced type top-entry embedded gas wave refrigerating machine | |
| CN221824307U (en) | Agricultural machinery unit sealing device | |
| CN204573043U (en) | A kind of combined type ring gear seal arrangement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |