CN109058463A - A kind of wear-resisting type rotary shaft lip seal device of forced-convection heat transfer - Google Patents
A kind of wear-resisting type rotary shaft lip seal device of forced-convection heat transfer Download PDFInfo
- Publication number
- CN109058463A CN109058463A CN201810989807.0A CN201810989807A CN109058463A CN 109058463 A CN109058463 A CN 109058463A CN 201810989807 A CN201810989807 A CN 201810989807A CN 109058463 A CN109058463 A CN 109058463A
- Authority
- CN
- China
- Prior art keywords
- lip
- spiral
- rotary shaft
- low power
- support frame
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/324—Arrangements for lubrication or cooling of the sealing itself
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
A kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer, include lip-type packing, support frame, gland, end cap and rotary shaft, lip-type packing includes metallic framework, garter springs and rubbery sealed body, and lip-type packing and support frame are bolted on gland.Spiral stream guidance slot is offered in the part of the surface of posterior lip angle lapping inclined-plane and the support frame cooperation of rubbery sealed body；Support frame cross sectional shape is L-type, is located at air side, offers air inlet on the circumferential surface abutted with rotary shaft, open up gas vent on gland and exposed aerial alien invasion；Air inlet and gas vent are respectively positioned in the fluting section on posterior lip angle lapping inclined-plane.Rotary shaft opens up a pair of oppositely oriented spiral very low power on the surface of lip-type packing air side, wherein close to the spiral very low power of lip, its rotation direction is identical as rotary shaft rotation direction, oppositely oriented far from its rotation direction of the spiral very low power of lip and rotary shaft, two beam spiral very low powers are gradually reduced along hand of helix groove depth and groove width.
Description
Technical field
The present invention relates to rubber-plastic sealing field, especially a kind of rotating shaft lip-shaped sealing device installs branch in air side
Support opens up spiral stream guidance slot, air inlet and venthole on support frame, and matched axis surface opens up spiral very low power, can be used for
The rotating machineries such as various compressors, gearbox, pump.
Background technique
Lip packing (abbreviation oil sealing) is a kind of form with self sealing action, for preventing oil leak and prevention
Foreign matter enters the elastomeric seal of sealing area.The advantages that simple, cheap because of its structure, it is widely used in all kinds of rotations
In machinery.The basic structure of lip packing generally comprises the three parts such as rubbery sealed body, metallic framework and banding garter springs, according to
By rubbery sealed body lip portion and pairing shaft between interference fit and medium is sealed, and operating pressure compared with
Gao Shi is easy to make oil sealing waist excessive deformation, and lip and axis contact area is caused to increase, and frictional heat generation aggravation is caused to cause to seal
Failure.
According to statistics, caused by the failure of most of oil sealings is the caused high temperature of oil seal lip friction.Oil seal lip and rotation
Shaft surface contact friction generates a large amount of heat, accumulates in contact site, causes temperature at lip sharply to increase, accelerate lip
Aging is hardened and unstable wear.When oil sealing works normally, the lubricating oil film that oil seal lip has one layer very thin with rotation between centers will
Axis and oil seal lip are kept apart, and are not only avoided that axis and lip directly contact, and reduce frictional heat generation, moreover it is possible to effectively prevent lubricating oil
Leakage.When axis high speed rotation, oil seal lip heat amount is sharply increased, and oil pocket and oil seal lip temperature is caused to increase, excessively high
Temperature may cause oil sealing rubber material accelerated ageing and cause seal failure；The reduction of lubricating oil viscosity, oil film thickness can also be made
Reduce, when oil film thickness is less than critical film thickness, oil sealing will appear lubrication failure, further result in seal failure.
In actual use, often because of the suspended matter in the oil liquid adherency air of air side leakage, along with the height of axis
Speed rotation brings these impurity into sealed lip, forms abrasive wear, to aggravate the abrasion of sealed lip and sealing is caused to lose
Effect.Currently, being usually to find more high temperature resistant, anti abrasive oil for the excessively high solution for causing failure of oil seal lip temperature
Closure material, and optimization lip seal configuration increase dustproof lip and oil sealing are made to adapt to higher lip temperature and abrasive wear situation,
But the lip high temperature occurred in use and impurity adhesion wear problem are not can avoid.
Notification number CN1508437A discloses a kind of easy to operate, low-cost wear-resisting knot of compressor crank shaft lip packing
Structure.The patent is by installing a wear sleeve in compressor crank shaft and the adhesion of lip packing contact zone, though lip shape can be reduced
Friction between sealing and compressor crank shaft prevents crankshaft wear, reduces maintenance cost.But the installation leakproofness of sleeve can not protect
Card, and in the presence of the suspended matter that can not be reduced lip packing lip frictional heat and be adhered in the air of lip, avoid lip height
The defect of temperature and impurity adhesion wear.
Summary of the invention
The present invention will overcome the lip temperature occurred in existing lip packing use process excessively high and impurity adherency is ground
It the shortcomings that grain abrasion, proposes that a kind of structure is simple, lip heat dissipation, reduction impurity adherency can actively be accelerated to enter strengthening for lip
The wear-resisting type rotating shaft lip-shaped sealing device of heat exchange.
The present invention is to be achieved through the following technical solutions:
A kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer includes lip-type packing 4, support frame 3, pressure
Lid 2, end cap 1 and rotary shaft 5, the lip-type packing 4 include metallic framework 41, garter springs 42 and rubbery sealed body 43；Institute
41 side of metallic framework is stated as oily side, the other side is air side；The lip-type packing 4 and support frame 3 are connected by bolt 21
It is fixed on gland 2；It is offered in the part of the surface that the posterior lip angle lapping inclined-plane of the rubbery sealed body 43 cooperates with support frame 3
Spiral stream guidance slot 31；3 cross sectional shape of support frame as described above is L-type, positioned at air side, on the ring inner peripheral surface abutted with rotary shaft 5
Air inlet 32 is offered, gas vent 33, air inlet 32 and row are offered on gland 2 and exposed aerial alien invasion
Stomata 33 is respectively positioned in the fluting section on 43 posterior lip angle lapping inclined-plane of rubbery sealed body；The gland 2 is connected and fixed by screw 11
On end cap 1；The rotary shaft 5 offers oppositely oriented first of a pair on the surface of 4 air side of lip-type packing
Spiral very low power 51 and the second spiral very low power 52, wherein close to first its rotation direction of spiral very low power 51 and rotary shaft 5 of lip
Rotation direction is identical, and second its rotation direction of spiral very low power 52 and rotary shaft 5 far from lip are oppositely oriented, the first spiral very low power
51 and second spiral very low power 52 be gradually reduced along its groove depth of hand of helix and groove width.
Further, the orifice shapes of the air inlet 32 and gas vent 33 are round hole, and diameter is set to dinWith
dout；The dinAnd doutSize it is related with shaft diameter D, relationship is between three: dout=0.6~0.8din, din=
0.03~0.1D.
Further, spiral is offered simultaneously on support frame as described above and the matching surface of lip inclined surface after rubbery sealed body 43
Diversion trench 31, the rotation direction and rotary shaft 5 of spiral stream guidance slot 31 are oppositely oriented.
Further, the cross sectional shape of the spiral very low power 51,52 and spiral stream guidance slot 31 be rectangle, it is triangle, trapezoidal
With it is one of arc-shaped.
The working principle of the invention:
The present invention proposes a kind of spiral very low power and support frame by rotating shaft surface and lip packing rubbery sealed body
Between the spiral stream guidance slot that cooperates it is mating, guidance gas flowing, accelerate to reduce lip temperature and reduce impurity adhesion wear can
The wear-resisting type rotary shaft lip seal device of forced-convection heat transfer specifically describes are as follows: in rotary shaft close to lip packing lip
The air shaft surface at place axially opens up a pair of of spiral very low power, the spiral very low power rotation direction is opposite, along hand of helix its
Groove depth and groove width are gradually reduced；Support frame is installed in lip packing air side, support frame as described above cross sectional shape is L-type, is located at
Cooperation offers spiral stream guidance in the part of the surface of the posterior lip angle lapping inclined-plane cooperation of air side, support frame as described above and rubbery sealed body
Slot；Air inlet is offered on the ring inner peripheral surface that support frame and rotary shaft above a pair of of spiral very low power intersection abut, tightly
Gas vent is offered on gland and exposed aerial alien invasion.When oil sealing works normally, hydraulic oil acts on lip shape
In sealing, rubbery sealed body is made to be adjacent to support frame, so that air inlet, spiral stream guidance slot and venthole is formed closed channel, work as rotation
Shaft high speed rotation, axis surface hot-air at the first spiral very low power disturbance lip of lip side, drives hot-air to big
Gas side movement, the reversed second spiral very low power disturbance outside cold air far from lip move it to oil seal lip side, promote
Two strands of air, which are assembled in groove intersection to air inlet, is moved into spiral stream guidance slot, and air flows in spiral stream guidance slot, band
It walks lip and is conducted through the heat come, therefore the temperature rise of lip can be effectively reduced；In addition, the spiral on the axis surface at lip is micro-
Groove, can accommodate the impurity of adherency, and the air-flow of disturbance is followed to move to the atmospheric side far from lip, and impurity is avoided to enter lip
Cause to wear.
The device have the advantages that being mainly manifested in:
The support frame for offering spiral stream guidance slot with rubbery sealed body waist contact side in the installation of lip packing air side, matches
Air shaft surface of the rotary shaft of set at lip packing lip axially opens up a pair of of spiral very low power, makes the heat at lip
Air moves out and cool ambient air is moved to diversion trench, seals progress heat with lip and exchanges, reduces the temperature rise of lip, lean on simultaneously
The spiral very low power on the axis surface at nearly lip can accommodate the impurity of cleaning adherency, prevent impurity from entering lip and cause to wear, have
Effect extends the service life of lip envelope.
Detailed description of the invention
Fig. 1 is the wear-resisting type rotating shaft lip-shaped sealing apparatus structure schematic diagram of forced-convection heat transfer.
Fig. 2 is support frame structure diagram of the invention.
Fig. 3 is the structural schematic diagram of rotary shaft spiral very low power of the invention.
Specific embodiment
Technical solution of the present invention is described in detail with reference to the accompanying drawing.
Shown in referring to FIG. 1, FIG. 2 and FIG. 3, in which:
1- end cap；2- gland；3- support frame；4- lip-type packing；5- rotary shaft；11- screw；21- bolt；31- spiral
Diversion trench；32- air inlet；33- gas vent；41- metallic framework；42- garter springs；43- rubbery sealed body；51,52- spiral is micro-
Groove.
A kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer includes lip-type packing 4, support frame 3, pressure
Lid 2, end cap 1 and rotary shaft 5, the lip-type packing 4 include metallic framework 41, garter springs 42 and rubbery sealed body 43；Institute
41 side of metallic framework is stated as oily side, the other side is air side；The lip-type packing 4 and support frame 3 are connected by bolt 21
It is fixed on gland 2 together；It is opened in the part of the surface that the posterior lip angle lapping inclined-plane of the rubbery sealed body 43 cooperates with support frame 3
Equipped with spiral stream guidance slot 31；3 cross sectional shape of support frame as described above is L-type, is located at air side, the ring inner periphery abutted with rotary shaft 5
Air inlet 32 is offered on face, and gas vent 33,32 He of air inlet are offered on gland 2 and exposed aerial alien invasion
Gas vent 33 is respectively positioned in the fluting section on 43 posterior lip angle lapping inclined-plane of rubbery sealed body；The gland 2 is fixed on by screw 11
On end cap 1；The rotary shaft 5 offers a pair of the first oppositely oriented spiral shell on the surface of 4 air side of lip-type packing
Very low power 51 and the second spiral very low power 52 are revolved, wherein first its rotation direction of spiral very low power 51 and rotary shaft 5 close to lip are revolved
To identical, second its rotation direction of spiral very low power 52 and rotary shaft 5 far from lip are oppositely oriented, the first spiral very low power 51
It is gradually reduced with the second spiral very low power 52 along its groove depth of hand of helix and groove width.
The orifice shapes of the air inlet 32 and gas vent 33 are circular orifice, and diameter is set to dinAnd dout；Institute
State dinAnd doutSize it is related with shaft diameter D, relationship is between three: dout=0.6~0.8din, din=0.03~
0.1D。
What support frame as described above 3 and 43 posterior lip angle lapping inclined-plane of rubbery sealed body cooperated offers spiral stream guidance slot simultaneously on the surface
31, the rotation direction and rotary shaft 5 of the spiral stream guidance slot 31 are oppositely oriented
The cross sectional shape of the first spiral very low power 51, the second spiral very low power 5152 and spiral stream guidance slot 31 is square
It is shape, triangle, trapezoidal and one of arc-shaped.The hot-air at the first spiral very low power 51 disturbance lip of lip side
It is moved to far from lip atmospheric side, the second spiral very low power 52 disturbance outside cold air far from lip is transported to oil seal lip side
Dynamic, the two crosses aggregation into spiral stream guidance slot 31 at air inlet 32, therefore in support frame 3 and the first of 5 surface of rotary shaft
The conduction of lip heat will be accelerated to exchange under the collective effect of spiral very low power 51 and the second spiral very low power 52.
In the present embodiment, in the higher situation of pressure, meeting excessive deformation causes lip and rotary shaft contact surface for lip packing
Product increases, and causes frictional heat generation to be aggravated, causes to fail.By installing support frame in oil sealing air side, oil sealing excessive deformation is prevented
While, accelerate the heat convection of air at lip, effectively slows down lip temperature rise, while the spiral very low power at lip can hold
The impurity that cleaning of receiving adheres to, prevents impurity from entering lip and causes to wear, and effectively extends the service life of oil sealing.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection model of the invention
Enclosing should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention also includes those skilled in the art
Member according to the present invention design it is conceivable that equivalent technologies mean.
Claims (4)
1. a kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer, comprising lip-type packing (4), support frame (3),
Gland (2), end cap (1) and rotary shaft (5), the lip-type packing (4) include metallic framework (41), garter springs (42) and rubber
Glue seal (43)；Metallic framework (41) side is oily side, and the other side is air side；The lip-type packing (4) and branch
Support (3) is fastened on gland (2) by bolt (21)；The posterior lip angle lapping inclined-plane of the rubbery sealed body (43) and support
Spiral stream guidance slot (31) are offered on the surface of frame (3) cooperation；Support frame as described above (3) cross sectional shape is L-type, is located at air side,
Air inlet (32) are offered on the ring inner peripheral surface abutted with rotary shaft (5), against gland (1) and exposed aerial outer vertical
It is offered on face gas vent (33), air inlet (32) and gas vent (33) are respectively positioned on rubbery sealed body (43) posterior lip angle lapping inclined-plane
It slots in section；The gland (2) is fixed on end cap (1) by screw (11)；The rotary shaft (5) is close to lip-type packing
(4) a pair of oppositely oriented the first spiral very low power (51) and the second spiral very low power are offered on the surface of air side
(52), wherein first spiral very low power (51) its rotation direction close to lip is identical as rotary shaft (5) rotation direction, the second of separate lip
Spiral very low power (52) its rotation direction and rotary shaft (5) are oppositely oriented, and the first spiral very low power (51) and the second spiral are micro-
Groove (52) is gradually reduced along its groove depth of hand of helix and groove width.
2. a kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer according to claim 1, feature exist
In: the orifice shapes of the air inlet (32) and gas vent (33) are circular orifice, and diameter is set to dinAnd dout；Institute
State dinAnd doutSize it is related with shaft diameter D, relationship is between three: dout=0.6~0.8din, din=0.03~
0.1D。
3. a kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer according to claim 2, feature exist
In: spiral stream guidance slot is offered on the surface of support frame as described above (3) and the cooperation of rubbery sealed body (43) posterior lip angle lapping inclined-plane, it is described
The rotation direction of spiral stream guidance slot and the spiral stream guidance slot (31) on the rubbery sealed body posterior lip angle lapping inclined-plane are oppositely oriented.
4. a kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer according to claim 3, feature exist
In: the first spiral very low power (51), the second spiral very low power (52), spiral stream guidance slot (31) and and the rubbery sealed body
(43) cross sectional shape of spiral stream guidance slot is opened up on the surface of posterior lip angle lapping inclined-plane cooperation is rectangle, triangle, trapezoidal and circular arc
One of shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810989807.0A CN109058463B (en) | 2018-08-28 | 2018-08-28 | Wear-resistant rotary shaft lip-shaped sealing ring device for forced convection heat exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810989807.0A CN109058463B (en) | 2018-08-28 | 2018-08-28 | Wear-resistant rotary shaft lip-shaped sealing ring device for forced convection heat exchange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109058463A true CN109058463A (en) | 2018-12-21 |
| CN109058463B CN109058463B (en) | 2019-12-24 |
Family
ID=64756343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810989807.0A Active CN109058463B (en) | 2018-08-28 | 2018-08-28 | Wear-resistant rotary shaft lip-shaped sealing ring device for forced convection heat exchange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109058463B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895094A (en) * | 2020-06-22 | 2020-11-06 | 东风柳州汽车有限公司 | Oil sealing structure for automobile engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202834078U (en) * | 2012-09-14 | 2013-03-27 | 青岛开世密封工业有限公司 | Active heat dissipation sealing ring with dustproof function |
| DE102015224418A1 (en) * | 2015-12-07 | 2017-06-08 | Schaeffler Technologies AG & Co. KG | Seal with protective / centrifugal and sealing washer for sealing multi-row roller bearings for rolling mill stands |
| WO2017109163A1 (en) * | 2015-12-23 | 2017-06-29 | Trelleborg Sealing Solutions Germany Gmbh | Seal arrangement with sealing film |
| WO2017217172A1 (en) * | 2016-06-15 | 2017-12-21 | Ntn株式会社 | Bearing device |
| CN209340507U (en) * | 2018-08-28 | 2019-09-03 | 浙江工业大学 | A kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer |
-
2018
- 2018-08-28 CN CN201810989807.0A patent/CN109058463B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202834078U (en) * | 2012-09-14 | 2013-03-27 | 青岛开世密封工业有限公司 | Active heat dissipation sealing ring with dustproof function |
| DE102015224418A1 (en) * | 2015-12-07 | 2017-06-08 | Schaeffler Technologies AG & Co. KG | Seal with protective / centrifugal and sealing washer for sealing multi-row roller bearings for rolling mill stands |
| WO2017109163A1 (en) * | 2015-12-23 | 2017-06-29 | Trelleborg Sealing Solutions Germany Gmbh | Seal arrangement with sealing film |
| WO2017217172A1 (en) * | 2016-06-15 | 2017-12-21 | Ntn株式会社 | Bearing device |
| CN209340507U (en) * | 2018-08-28 | 2019-09-03 | 浙江工业大学 | A kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895094A (en) * | 2020-06-22 | 2020-11-06 | 东风柳州汽车有限公司 | Oil sealing structure for automobile engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109058463B (en) | 2019-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7946591B2 (en) | Combined labyrinth seal and screw-type gasket bearing sealing arrangement | |
| CN104390020B (en) | Butterfly valve | |
| US20100201075A1 (en) | Isolator sealing device | |
| CA1270026A (en) | Sealing method for bearing assemblies | |
| US20130175763A1 (en) | Lubricated Shaft Seal | |
| US20140301848A1 (en) | Sealing assembly | |
| GB2517573A (en) | Dynamically non contacting seal | |
| CN209340507U (en) | A kind of wear-resisting type rotating shaft lip-shaped sealing device of forced-convection heat transfer | |
| CA2593260C (en) | Bearing housing seal system for centrifugal pumps | |
| CN109058463A (en) | A kind of wear-resisting type rotary shaft lip seal device of forced-convection heat transfer | |
| CN205349836U (en) | Liquid seal structure, water pump and engine | |
| CN104832653A (en) | Sealing device for high-speed rotating shaft | |
| US2192305A (en) | Seal for rotating shafts | |
| CN205136017U (en) | A self -lubricating double seal structure for lobe pump drive end | |
| CN107100881A (en) | Fluid-tight structure, water pump and engine | |
| CN110552889B (en) | Leakage-free centrifugal pump | |
| CN205534171U (en) | Sealed lid of transaxle final drive of area heat dissipation function | |
| CN212564389U (en) | Mechanical sealing element | |
| CN207715338U (en) | The crankshaft seal structure of reciprocating compressor | |
| CN113494609A (en) | Sealing ring | |
| CN220706014U (en) | Self-lubricating structure for fan rotating shaft and fan | |
| CN106050690B (en) | Centrifugal air pump | |
| CN211009898U (en) | Air seal assembly structure | |
| CN221145300U (en) | Centrifugal sealing ring | |
| CN109114036A (en) | A kind of bearing arrangement applied on water pump |
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 |