CN117847222A - Crankshaft front oil seal, engine and vehicle - Google Patents

Crankshaft front oil seal, engine and vehicle Download PDF

Info

Publication number
CN117847222A
CN117847222A CN202211213815.9A CN202211213815A CN117847222A CN 117847222 A CN117847222 A CN 117847222A CN 202211213815 A CN202211213815 A CN 202211213815A CN 117847222 A CN117847222 A CN 117847222A
Authority
CN
China
Prior art keywords
crankshaft
annular
oil seal
seal
front oil
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.)
Pending
Application number
CN202211213815.9A
Other languages
Chinese (zh)
Inventor
张楠
李丽
陈小池
郭鹏
陈梦园
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYD Co Ltd
Original Assignee
BYD Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN202211213815.9A priority Critical patent/CN117847222A/en
Publication of CN117847222A publication Critical patent/CN117847222A/en
Pending legal-status Critical Current

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
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • 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
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • 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
    • F16J15/3268—Mounting of sealing 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
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The invention relates to a front crankshaft oil seal, an engine and a vehicle, wherein the front crankshaft oil seal is used for sealing a gap between a crankshaft and a crankshaft hole of an engine body and comprises a first annular sealing part, a second annular sealing part, a third annular sealing part and a connecting part, wherein the first annular sealing part is used for being in sealing contact with the outer peripheral surface of the crankshaft, the second annular sealing part is used for being in sealing contact with the inner wall of the crankshaft hole, the third annular sealing part is used for being in sealing contact with a rotating wheel arranged on the front side of the engine body and on the crankshaft; the connecting portion is connected between the first annular seal and the second annular seal, and the third annular seal is connected to the connecting portion. According to the crankshaft front oil seal, the third annular sealing part is in sealing fit with the surface of the rotary wheel, so that a gap between the engine body and the rotary wheel is sealed, and the risk that external muddy water enters the cavity of the engine through the gap between the rotary wheel and the engine body is reduced by combining the sealing effect of the first annular sealing part and the second annular sealing part.

Description

Crankshaft front oil seal, engine and vehicle
Technical Field
The invention belongs to the technical field of engines, and relates to a front crankshaft oil seal, an engine and a vehicle.
Background
The engine generally comprises an engine body, a crankshaft, a rotating wheel and other structures, wherein a cavity is formed in the engine body, the crankshaft is positioned in the cavity, the front end of the crankshaft extends out of a crankshaft hole of the engine body, and the rotating wheel is arranged on the front side of the engine body and connected with the front end of the crankshaft.
In order to avoid the leakage of lubricating oil in the cavity, a crankshaft front oil seal is arranged between the crankshaft and the engine body.
In the prior art, a pressure difference exists between a cavity formed in an engine body and the external environment, and external muddy water can be led to enter the engine cavity through a gap between a rotating wheel and the engine body and a crankshaft front oil seal to a certain extent.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the engine comprises a rotary wheel, a crankshaft, a front oil seal and a vehicle.
In order to solve the technical problems, in one aspect, the invention provides a front oil seal of a crankshaft, which is used for sealing a gap between the crankshaft and a crankshaft hole of an engine body, and comprises a first annular sealing part used for being in sealing contact with the peripheral surface of the crankshaft, a second annular sealing part used for being in sealing contact with the inner wall of the crankshaft hole, a third annular sealing part used for being in sealing contact with a rotating wheel arranged on the front side of the engine body and arranged on the crankshaft, and a connecting part; the connecting portion is connected between the first annular seal and the second annular seal, and the third annular seal is connected to the connecting portion.
Optionally, the third annular seal comprises a wear layer for abutment against the surface of the rotating wheel.
Optionally, the crankshaft front oil seal further comprises a first supporting framework embedded in the wear-resistant layer.
Optionally, the wear layer has a tip formed thereon for insertion into a surface of a rotating wheel; the tip is annular.
Optionally, the crankshaft front oil seal further comprises a second supporting framework embedded in the second annular sealing part.
Optionally, the first support skeleton and the second support skeleton are integrally provided.
Optionally, a sealing lip for sealing contact with the outer circumferential surface of the crankshaft and forming an oil film is provided on the radially inner side of the first annular seal portion.
Optionally, the number of the sealing lips is a plurality.
Optionally, an annular clamping groove is formed in the radial outer side of the first annular sealing portion, the front oil seal of the crankshaft further comprises an annular elastic body, and the annular elastic body is tensioned and clamped in the annular clamping groove so that the sealing lip is clamped on the outer peripheral surface of the crankshaft.
Optionally, a waterproof lip for waterproofing is provided on a radially inner side of the first annular seal portion.
Optionally, the first annular seal portion, the second annular seal portion and the third annular seal portion are integrally formed.
According to the crankshaft front oil seal provided by the embodiment of the invention, the third annular sealing part is in sealing fit with the surface of the rotating wheel, so that the gap between the engine body and the rotating wheel is sealed, and the risk that external muddy water enters the cavity of the engine through the gap between the rotating wheel and the engine body is reduced by combining the sealing effect of the first annular sealing part and the second annular sealing part.
In still another aspect, an embodiment of the present invention provides an engine, including an engine body, a crankshaft, a rotating wheel, and a crankshaft front oil seal described above.
Optionally, a recess is formed on the surface of the rotating wheel, a tip inserted into the recess is formed on the wear-resistant layer, and the tip is in interference fit with the recess on the rotating wheel.
In yet another aspect, an embodiment of the present invention provides a vehicle including the engine described above.
Drawings
FIG. 1 is a schematic diagram of a front oil seal of a crankshaft provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating assembly of a front oil seal of a crankshaft, an engine body and a rotating wheel according to an embodiment of the present invention;
fig. 3 is an enlarged view of assembly of a front oil seal of a crankshaft, an engine body and a rotating wheel according to an embodiment of the present invention.
Reference numerals in the specification are as follows:
10. a crankshaft; 20. an engine body; 21. a crankshaft hole; 30. a crankshaft front oil seal; 40. a rotating wheel; 41. a recess;
31. a first annular seal; 311. a sealing lip; 312. a waterproof lip; 313. an annular clamping groove;
32. a second annular seal;
33. a third annular seal; 331. a wear-resistant layer; 332. a tip;
34. a first support frame;
35. a second support frame;
36. an annular elastomer;
37. and a connection portion.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 3, a crankshaft front oil seal 30 provided in a first embodiment of the present invention for sealing a gap between a crankshaft 10 and a crankshaft hole 21 of an engine block includes a first annular seal portion 31, a second annular seal portion 32, a third annular seal portion 33, and a connecting portion 37; wherein, first annular seal 31, second annular seal 33 are coaxial to be set up, the junction portion 37 connects between first annular seal 31 and second annular seal 32, the third annular seal 33 connects on junction portion 37, first annular seal 31 is used for with the sealed contact of crankshaft 10 outer peripheral face, second annular seal 32 is used for with the sealed contact of crankshaft hole 21 inner wall, third annular seal 33 is used for with locating the front side of engine block's swiveling wheel 40 sealing contact, third annular seal 33 includes the wearing layer 331 used for abutting on swiveling wheel 40 surface.
When the front crankshaft oil seal 30 of the present embodiment is applied to an engine, a cavity is formed in the engine body, the crankshaft is located in the cavity, the front end of the crankshaft extends out of the crankshaft hole 21 of the engine body, the rotating wheel 40 is disposed at the front side of the engine body and is connected to the front end of the crankshaft, the front crankshaft oil seal 30 of the present embodiment is disposed between the inner wall of the crankshaft hole 21 and the outer circumferential surface of the crankshaft, and the third annular sealing portion 33 extends to the front side of the engine body in the axial direction of the crankshaft so that the wear-resistant layer 331 abuts against the rotating wheel 40.
According to the crankshaft front oil seal 30 of the embodiment of the invention, the first annular seal portion 31 abuts on the outer peripheral surface of the crankshaft 10 to be in sealing contact with the outer peripheral surface of the crankshaft 10, the second annular seal portion 32 abuts on the inner wall of the crankshaft hole 21 of the engine body to be in sealing contact with the inner wall of the crankshaft hole 21, and at the same time the wear-resistant layer 331 of the third annular seal portion 33 abuts on the rotating wheel 40 on the front side of the engine body to generate friction with the rotating wheel 40 and be in sealing contact. The crankshaft 10 and the rotating wheel 40 integrally rotate, the crankshaft front oil seal 30 is fixed relative to the engine body, that is, a dynamic seal is formed between the first annular seal portion 31 and the crankshaft 10, a static seal is formed between the second annular seal portion 32 and the engine body, and a dynamic seal is formed between the third annular seal portion 33 and the rotating wheel 40 by friction, so that the third annular seal portion 33 is provided in an annular shape and is used for abutting against the wear-resistant layer 331 on the surface of the rotating wheel 40. In this way, the third annular sealing portion 33 is in sealing engagement with the surface of the rotating wheel 40, sealing the gap between the engine block and the rotating wheel 40, and in combination with the sealing action of the first annular sealing portion 31 and the second annular sealing portion 32, reducing the risk of external muddy water entering the interior of the cavity of the engine through the gap between the rotating wheel 40 and the engine block.
In other embodiments, the wear layer 331 may also be omitted, and the seal between the rotating wheel 40 and the third annular seal 33 may be achieved in other ways, such as by an oil seal arrangement, or by a sealed bearing.
The crankshaft front oil seal 30 is a revolution body around the central axis of the crankshaft 10. Fig. 1 shows a cross-sectional structure of the crankshaft front oil seal 30, fig. 2 shows a cross-sectional structure of the crankshaft front oil seal 30 when applied to an engine, and fig. 3 shows a partially enlarged view of the crankshaft front oil seal 30 when applied to the engine.
In one embodiment, referring to fig. 1 and 3, the crankshaft front oil seal 30 further includes a first support frame 34 embedded in the wear layer 331. The first supporting framework 34 supports the wear-resistant layer 331, so that the wear-resistant layer 331 can always abut against the surface of the rotating wheel 40. Referring to fig. 1 and 3, the wear layer 331 is formed with a tip 332 for being inserted into the surface of the rotating wheel 40; the tip 332 is annular in shape. More preferably, the surface of the rotating wheel 40 has a recess 41 formed therein, the tip 332 is inserted into the recess 41, and the tip 332 is interference-fitted with the recess 41 of the rotating wheel 40 (i.e., the tip 332 is compressed in the recess 41). The provision of the recess 41 can increase the contact area between the tip 332 and the rotating wheel 40, and the sealing effect is better. In addition, when the tip 332 is worn slightly due to long-term use, it can also be interference-fitted with the recess 41, so that the seal between the sealed engine body and the rotary wheel 40 can be maintained for a long time.
Referring to the drawings, the tip 332 extends in the radial direction of the crankshaft 10, and the recess 41 is provided on the radial surface of the rotary wheel 40.
In one embodiment, referring to fig. 1 and 3, the crankshaft front oil seal 30 further includes a second support frame 35 embedded in the second annular seal portion 32. The second supporting frame 35 supports the second annular sealing portion 32, and ensures that the second annular sealing portion 32 can abut against the inner wall of the crank hole 21.
More preferably, the first support frame 34 and the second support frame 35 are integrally provided to further enhance the supporting effect of the abrasion-resistant layer 331 and the second annular seal portion 32. In this embodiment, the first supporting frame 34 and the second supporting frame 35 are integrally formed. The first support frame 34 and the second support frame 35 are formed in the third annular seal portion 33 and the second annular seal portion 32, respectively, by a vulcanization process.
In an embodiment, referring to fig. 1 and 3, a seal lip 311 for forming an oil film with the outer peripheral surface of the crankshaft 10 is provided on the radially inner side of the first annular seal portion 31. Preferably, the number of the sealing lips 311 is plural. Preferably, the sealing lip 311 is provided integrally with the first annular sealing portion 31.
In the first embodiment, referring to fig. 1 and 3, 2 seal lips 311 are provided, which are a first seal lip 311 and a second seal lip 311, respectively. The second seal lip 311 is closer to the first annular seal portion 31 than the first seal lip 311. The first seal lip 311 is in interference fit with the crankshaft 10 (the first seal lip 311 is in a compressed state after being assembled), and the second seal lip 311 is in interference fit with the crankshaft 10 (the second seal lip 311 is in a compressed state after being assembled). Thus, two seals are provided between the crankshaft front oil seal 30 and the crankshaft 10. In this way, even when the third annular seal portion 33 fails, muddy water, dust and the like hardly enter the cavity of the engine through the first seal lip 311 and the second seal lip 311, and engine oil in the cavity of the engine hardly leaks out through the crankshaft front oil seal 30.
In one embodiment, referring to fig. 1 and 3, the first sealing lip 311 is a double lip structure. The double lip structure is equivalent to two seals, further enhancing the sealing performance of the crankshaft front oil seal 30.
Preferably, the first annular sealing portion 31, the second annular sealing portion 32 and the third annular sealing portion 33 are integrally formed.
In an embodiment, referring to fig. 1 and 3, an oil seal lip oil return line is disposed on an inner wall of the first annular seal portion 31, and the oil seal lip oil return line is located radially inward of the second seal lip 311.
In an embodiment, referring to fig. 1 and 3, an annular clamping groove 313 is formed on the radial outer side of the first annular sealing portion 31, and the front oil seal 30 further includes an annular elastic body 36, where the annular elastic body 36 is tensioned and clamped in the annular clamping groove 313 so that the sealing lip 311 is clamped on the outer peripheral surface of the crankshaft 10. The annular elastic body 36 can ensure the interference fit of the first sealing lip 311, the second sealing lip 311 and the oil seal lip oil return line with the crankshaft 10.
The annular elastic body 36 is an annular spring or an annular clamp. Preferably a ring spring, the assembly is simpler.
In one embodiment, the first annular seal 31 is provided on a radially inner side with a waterproof lip 312 for waterproofing.
In this way, the third annular sealing portion 33 is in sealing engagement with the surface of the rotary wheel 40, sealing the gap between the engine block and the rotary wheel 40, and preventing external muddy water from entering the interior of the cavity of the engine through the gap between the rotary wheel 40 and the engine block. The first annular seal portion 31 and the second annular seal portion 32 function as oil seals for sealing between the wall of the crank hole 21 of the engine block and the crankshaft 10. Two seals (a first seal lip 311 and a second seal lip 311) are provided between the first annular seal portion 31 and the crankshaft 10, and a waterproof lip 312 is additionally provided. Like this, combine waterproof lip 312 through three seals, not only guarantee not leak outward of engine oil in the cavity of sealed engine, also can prevent muddy water to get into in the cavity of engine simultaneously, can play the effect of oil-water seal isolation, realize sealing dust, muddy water and engine oil for this bent axle front oil blanket 30 collects waterproof, dustproof and seals oily in an organic wholely, reduces the risk that the engine leads to because of sealed inefficacy, makes this bent axle front oil blanket 30 applicable in engine work occasions such as soaking, has strengthened the security that the vehicle waded.
In addition, an engine according to an embodiment of the present invention is provided, and referring to fig. 2 and 3, the engine includes the crankshaft front oil seal 30, the crankshaft 10, the engine body 20, and the rotating wheel 40 of the above-described embodiment. Wherein the rotating wheel 40 is typically a crank pulley.
In yet another aspect, an embodiment of the present invention further provides a vehicle including the engine of the above embodiment.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (14)

1. The front oil seal of the crankshaft is used for sealing a gap between the crankshaft and a crankshaft hole of an engine body and is characterized by comprising a first annular sealing part, a second annular sealing part, a third annular sealing part and a connecting part, wherein the first annular sealing part is used for being in sealing contact with the outer peripheral surface of the crankshaft, the second annular sealing part is used for being in sealing contact with the inner wall of the crankshaft hole, the third annular sealing part is used for being in sealing contact with a rotating wheel arranged on the front side of the engine body and the crankshaft;
the connecting portion is connected between the first annular seal and the second annular seal, and the third annular seal is connected to the connecting portion.
2. The crankshaft front oil seal according to claim 1, wherein the third annular seal portion includes a wear layer for abutting against a surface of a rotating wheel.
3. The crankshaft front oil seal of claim 2, further comprising a first support skeleton embedded within the wear layer.
4. The crankshaft front oil seal according to claim 2, wherein the wear-resistant layer is formed thereon with a tip for insertion into a surface of the rotary wheel; the tip is annular.
5. The crankshaft front oil seal according to claim 2, further comprising a second support skeleton embedded within the second annular seal portion.
6. The crankshaft front oil seal according to claim 5, wherein the first support frame and the second support frame are integrally provided.
7. The crankshaft front oil seal according to claim 1, wherein a seal lip for sealing contact with an outer peripheral surface of the crankshaft is provided on a radially inner side of the first annular seal portion.
8. The crankshaft front oil seal according to claim 7, wherein the number of the seal lips is plural.
9. The crankshaft front oil seal according to claim 7, wherein an annular clamping groove is formed on the radial outer side of the first annular sealing portion, and the crankshaft front oil seal further comprises an annular elastic body which is tensioned and clamped in the annular clamping groove so that the sealing lip is clamped on the outer peripheral surface of the crankshaft.
10. The crankshaft front oil seal according to claim 7, wherein a waterproof lip for waterproofing is provided on a radially inner side of the first annular seal portion.
11. The crankshaft front oil seal according to claim 1, wherein the first annular seal portion, the second annular seal portion, and the third annular seal portion are integrally formed.
12. An engine comprising an engine block, a crankshaft, a rotating wheel and a crankshaft front oil seal according to any one of claims 1 to 11.
13. The engine of claim 12, wherein the rotating wheel has a recess formed in a surface thereof, and wherein the wear layer has a tip formed therein that is inserted into the recess, the tip being in an interference fit with the recess in the rotating wheel.
14. A vehicle comprising an engine as claimed in claim 12 or 13.
CN202211213815.9A 2022-09-30 2022-09-30 Crankshaft front oil seal, engine and vehicle Pending CN117847222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211213815.9A CN117847222A (en) 2022-09-30 2022-09-30 Crankshaft front oil seal, engine and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211213815.9A CN117847222A (en) 2022-09-30 2022-09-30 Crankshaft front oil seal, engine and vehicle

Publications (1)

Publication Number Publication Date
CN117847222A true CN117847222A (en) 2024-04-09

Family

ID=90527610

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211213815.9A Pending CN117847222A (en) 2022-09-30 2022-09-30 Crankshaft front oil seal, engine and vehicle

Country Status (1)

Country Link
CN (1) CN117847222A (en)

Similar Documents

Publication Publication Date Title
CN103228963B (en) With the dynamic radial shaft seal assembly of the dust-proof thrust pad of combined type
CN105370890A (en) Low-friction dynamic seal
US20150285379A1 (en) Sealing device
DE50010589D1 (en) sealing arrangement
CN1980828A (en) Sealing arrangement and link of a chain with said sealing arrangement
US20190390775A1 (en) Heavy duty wheel seal with dry running resistance
US8573602B2 (en) Radial shaft seal with dust exclusion and hydrodynamic sealing feature
CN2818405Y (en) Sealer of roller bearing seat
CN204985720U (en) A sealing device for driven shaft
CN212959552U (en) Sealing structure of bearing for belt pulley of decoupler built in automobile generator
US6039322A (en) Sealing arrangement
CN210830472U (en) Framework oil seal structure
CN117847222A (en) Crankshaft front oil seal, engine and vehicle
CA2444283A1 (en) Cartridge seal assembly
JP2004263738A (en) Sealing device
CN210118455U (en) Combined oil seal structure
CN106168257A (en) A kind of agricultural machine wheel hub bearing unit sealing device
JP4069435B2 (en) Spindle seal device
CN219388615U (en) Oil seal for motor shaft
CN219221055U (en) IP67 bearing isolator
CN205978105U (en) Agricultural machinery wheel hub bearing sealing device for unit
CN220396471U (en) Oil seal, engine and vehicle
CN218913732U (en) Novel muddy water-proof oil seal
CN217519079U (en) Oil lubrication hub unit
CN220956809U (en) Long-service-life muddy water-proof hub oil seal with V-shaped ring

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