CN211649061U

CN211649061U - Box-type oil seal suitable for rotating speed is higher

Info

Publication number: CN211649061U
Application number: CN201922002621.4U
Authority: CN
Inventors: 程珊
Original assignee: Kunshan Mks Oil Seal Industrial Co ltd
Current assignee: Kunshan Mks Oil Seal Industrial Co ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-10-09
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a box-shaped oil blanket suitable for rotational speed is higher, including interior oil seal body, outer oil seal body set up in the outside of interior oil seal body, interior oil seal body includes inner frame and interior seal, outer oil seal body includes outer frame and outer seal, interior seal be equipped with first seal lip, second seal lip, be equipped with third seal lip, fourth seal lip, fifth seal lip, sixth seal lip, main seal lip on the outer seal, the dustproof enclosure space of its formation, grease proofing airtight space cooperate and have formed good dustproof, grease proofing structure.

Description

Box-type oil seal suitable for rotating speed is higher

Technical Field

The utility model relates to a mechanical oil blanket field, especially a box-type oil blanket suitable for rotational speed is higher.

Background

At present, on the design of oil blanket, there are more application scheme, but because the reason of its structure, from the failure analysis that the use takes place, current oil blanket to the higher structure of rotational speed, causes the serious wearing and tearing of seal lip very easily, leads to the leakproofness variation of oil blanket, and its great friction also does not benefit to mechanical structure's rotation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of the oil leak that became invalid easily in the use of current oil blanket product, designed a box-shaped oil blanket that is applicable to the rotational speed is higher.

The technical scheme of the utility model is that, a box-type oil seal suitable for the higher rotational speed, including the interior oil seal body, the outer oil seal body sets up in the outside of the interior oil seal body, wherein, the interior oil seal body includes inner frame and inner seal, the inner seal is attached to the outside with inner frame, the outer oil seal body includes outer frame and external seal, the bending of inner frame, outer frame, and form limit structure with inner frame, outer frame cooperation, the external seal is attached to and outer frame and is located the space that outer frame terminal surface and inner frame terminal surface formed, be equipped with the seal lip on inner seal body, the external seal body, be equipped with first seal lip, second seal lip on the inner seal body, be equipped with third seal lip, fourth seal lip, fifth seal lip, sixth seal lip, main seal lip on the external seal body, first seal lip, second seal lip cross-section are "J" shape, reduction friction area that can be very big, and the third seal lip cross-section is the toper, and toper cusp and contact surface contact, fourth seal lip, fifth seal lip, sixth seal lip cross-section rectangle all contact with 45 degrees angles and contact surface, all can reduce friction area.

Further, first seal lip encloses synthetic first dustproof enclosure space with inner frame and base, first seal lip, second seal lip enclose synthetic second dustproof enclosure space with the inner frame, the second seal lip encloses synthetic third dust prevention enclosure space with the bending part and the outer skeleton of inner frame, synthetic fourth oil-proof enclosure space is enclosed with the inner frame to third seal lip, fourth seal lip, fifth seal lip and inner frame, and synthetic fifth oil-proof enclosure space is enclosed with the inner frame to fourth seal lip, and synthetic seventh oil-proof enclosure space is enclosed with the inner frame to fifth seal lip, main seal lip and inner frame.

The outer framework structure is further explained, the cross section of the outer framework is in a step shape, a U-shaped groove is formed in the bottom end of the outer framework, and the first inner framework is inserted into the U-shaped groove to form a limiting structure with the end face of the inner framework.

Further, the inner frame comprises a first inner frame and a second inner frame, and the second inner frame is arranged at the upper end of the first inner frame and forms a limiting structure with the outer frame in a matching mode.

Further, the sealing lips are all rubber sealing lips.

Further, the outer side of the outer sealing body is provided with a holding spring.

The dustproof and oilproof structure has the advantages that 1, the inner sealing body and the outer sealing body are provided with the sealing lips, the inner framework and the outer framework which are enclosed to form a plurality of dustproof closed spaces and oilproof closed spaces, so that a plurality of dustproof and oilproof barriers are formed, and a large amount of lubricating grease is coated on each structure to be matched with the dustproof closed spaces and the oilproof closed spaces to form an excellent dustproof and oilproof structure;

2. the outer framework or the inner framework is bent and matched with each other to form a limiting structure, so that the assembly is convenient to limit, and a closed dustproof space is formed, so that the oil seal disclosed by the utility model has the characteristic of working under very severe working conditions, is easy to install in place, is suitable for very severe assembly lines, has high installation efficiency, and is not easy to cause the failure of oil seal assembly;

3. first seal lip, second seal lip cross-section are "J" shape, and the contact surface is the side, and frictional force is littleer, and third seal lip cross-section is the toper, and reduction friction area that can be very big, third seal lip, fourth seal lip, fifth seal lip, sixth seal lip all become 45 degrees angles, are difficult for the rupture more, reduce the loss that causes because of the friction more, more be applicable to the higher optical axis of rotational speed.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional configuration of the present invention;

in the figure, 1, an inner oil seal body; 2. an outer oil seal body; 3. an inner skeleton; 301. a first inner skeleton; 302. a second inner skeleton; 4. an inner seal body; 5. a sealing lip; 501. a first seal lip; 502. a second sealing lip; 503. a third sealing lip; 504. a fourth sealing lip; 505. a fifth sealing lip; 506. a sixth sealing lip; 507. a primary seal lip; 6. an outer skeleton; 7. an outer seal body; 801. a first dust-proof enclosed space; 802. a second dust-proof enclosed space; 803. a third dust prevention closed space; 804. a fourth oil-tight space; 805. a fifth oil-tight space; 806. a sixth oil resistant enclosed space; 807. a seventh oil-tight space; 9. a U-shaped groove; 10. tightly holding the spring; 11. and (3) oil.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a technical solution: the utility model provides a box-type oil blanket suitable for rotational speed is higher, including interior oil blanket body 1, outer oil blanket body 2 sets up in the outside of interior oil blanket body 1, wherein, interior oil blanket body 1 includes inner frame 3 and inner seal 4, the attached outside with inner frame 3 of inner seal 4, inner seal 4 sets up a seal lip 5 at least, outer oil blanket body 2 includes outer skeleton 6 and external seal 7, inner frame 3, buckling of outer skeleton 6, and with inner frame 3, the cooperation of outer skeleton 6 forms limit structure, outer seal 7 is attached on and outer skeleton 6 and be located the space that outer skeleton 6 terminal surface and inner frame 3 terminal surface formed, be equipped with main seal lip 507 and at least one seal lip 5 on the external seal 7, this part has wholly introduced the utility model discloses a structure, and the more detailed position relation of introducing each structure.

The inner sealing body 4 is provided with a first sealing lip 501 and a second sealing lip 502, the outer sealing body 7 is provided with a third sealing lip 503, a fourth sealing lip 504, a fifth sealing lip 505 and a sixth sealing lip 506, the first sealing lip 501, the inner framework 3 and the bottom edge thereof enclose a first dust-proof enclosed space 801, the first sealing lip 501, the second sealing lip 502 and the inner framework 3 enclose a second dust-proof enclosed space 802, the second sealing lip 502, the bent part of the inner framework 3 and the outer framework 6 enclose a third dust-proof enclosed space 803, the third sealing lip 503, the fourth sealing lip 504 and the inner framework 3 enclose a fourth oil-proof enclosed space 804, the fourth sealing lip 504, the fifth sealing lip 505 and the inner framework 3 enclose a fifth oil-proof enclosed space 805, the fifth sealing lip 505, the sixth sealing lip 506 and the inner framework 3 enclose a sixth oil-proof enclosed space 806, the sixth sealing lip 506, the main sealing lip 507 and the inner framework 3 enclose a seventh oil-proof enclosed space 807, the position relation and the function of the seal lip 5 are described in detail, when the oil seal works, dust or other pollutants in air can enter the first dust-proof closed space 801, the first dust-proof closed space 801 is filled with oil 11, when the oil seal works, the temperature can rise due to rotation, the oil 11 in the closed space is heated and expands, the first seal lip 501 is subjected to pressure, the pressure of the first seal lip 501 on the inner framework 3 is increased, the tightness of the first dust-proof closed space 801 is improved, the dust or other pollutants in the air is reduced to enter the second dust-proof closed space 802, the second dust-proof closed space 802 and the third dust-proof closed space 803 have the same working principle, a multi-layer dust-proof effect is achieved, when the oil seal works, the main seal lip 507 can prevent the oil 11 from entering the seventh oil-proof closed space 807, the sixth oil-proof closed space 806 is filled with the oil 11, and when the oil seal works, because of the rotation, the temperature rises, the oil 11 in the closed space expands thermally, the sixth sealing lip 506 is pressurized, the pressure of the sixth sealing lip 506 on the inner frame 3 is increased, the tightness of the seventh oil-proof closed space 807 is increased, the oil in the machine is reduced from entering the sixth oil-proof closed space 806, and the fourth oil-proof closed space 804, the fifth oil-proof closed space 805 and the sixth oil-proof closed space 806 have the same working principle and play a role in preventing the oil in the machine from leaking outwards in multiple layers.

The cross sections of the first sealing lip 501 and the second sealing lip 502 are J-shaped, the friction area can be greatly reduced, the cross section of the third sealing lip 503 is conical, a conical tip is in contact with a contact surface, the cross sections of the fourth sealing lip 504, the fifth sealing lip 505 and the sixth sealing lip 506 are cylindrical, the cross sections of the fourth sealing lip, the fifth sealing lip and the sixth sealing lip are in contact with the contact surface at an angle of 45 degrees, the friction area can be reduced, the structural shape of each sealing lip 5 is introduced, the design is carried out in order to be suitable for the optical axis with higher rotating speed, and the loss caused by friction is greatly reduced.

Inner frame 3 includes first inner frame 301 and second inner frame 302, second inner frame 302 sets up in the upper end of first inner frame 301, form limit structure with 6 cooperations of outer skeleton, 6 cross-sections of outer skeleton are the stairstepping, its bottom is equipped with U-shaped groove 9, form limit structure with 3 terminal surfaces of inner frame, seal lip 5 is rubber seal lip 5, the outside of external sealing body 7 is equipped with holds spring 10 tightly, the structural position of the inside skeleton of oil blanket has mainly been introduced to this part, hold spring 10 and push away external sealing body 5 and paste tight inner frame 3, make main seal lip 507 hug closely inner frame 3, guarantee the seal.

The working principle is as follows: when the oil seal works, dust or other pollutants in the air can enter the first dust-proof closed space 801, the first dust-proof closed space 801 is filled with oil 11, the oil seal can be heated up due to rotation when working, the oil 11 in the closed space can be thermally expanded, the first sealing lip 501 is stressed, the pressure of the first sealing lip 501 on the inner framework 3 is increased, the tightness of the first dust-proof closed space 801 is increased, the dust or other pollutants in the air can be prevented from entering the second dust-proof closed space 802, the second dust-proof closed space 802 and the third dust-proof closed space 803 have the multi-layer dust-proof effect with the same working principle, when the oil seal works, the main sealing lip 507 can prevent the oil outside the oil seal from entering the seventh oil-proof sealed space 807, the sixth oil-proof closed space 806 is filled with the oil 11, when the oil seal works, the temperature can be raised due to rotation, the oil 11 in the closed space can be thermally expanded, the sixth sealing lip 506 is pressurized, so that the pressure of the sixth sealing lip 506 on the inner frame 3 is increased, the tightness of the seventh oil-proof closed space 807 is increased, the oil 11 in the machine is prevented from entering the sixth oil-proof closed space 806, and the fourth oil-proof closed space 804, the fifth oil-proof closed space 805 and the sixth oil-proof closed space 806 have the same working principle and play a role in preventing the oil 11 from leaking outwards in multiple layers.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims

1. The utility model provides a box-type oil blanket suitable for rotational speed is higher, its characterized in that, includes interior oil seal body (1), outer oil seal body (2) set up in the outside of interior oil seal body (1), wherein, interior oil seal body (1) includes inner frame (3) and interior seal (4), be equipped with first seal lip (501), second seal lip (502) on interior seal (4), first seal lip (501), second seal lip (502) cross-section are "J" shape, and its friction surface is the side of this seal lip.

2. The box-type oil seal applicable to the higher rotating speed according to claim 1, wherein the inner seal body (4) is attached to the outer side of the inner framework (3), the outer oil seal body (2) comprises an outer framework (6) and an outer seal body (7), the inner framework (3) and the outer framework (6) are bent and matched with the inner framework (3) and the outer framework (6) to form a limiting structure, the outer seal body (7) is attached to the outer framework (6) and located in a space formed by the end face of the outer framework (6) and the end face of the inner framework (3), and seal lips (5) are arranged on the inner seal body (4) and the outer seal body (7).

3. The box type oil seal applicable to higher rotating speed according to claim 2, wherein a third seal lip (503), a fourth seal lip (504), a fifth seal lip (505), a sixth seal lip (506) and a main seal lip (507) are arranged on the outer seal body (7), the section of the third seal lip (503) is conical, the conical tip is in contact with the contact surface, and the sections of the fourth seal lip (504), the fifth seal lip (505) and the sixth seal lip (506) are rectangular, and are in contact with the contact surface in a 45-degree angle arrangement mode capable of reducing friction area.

4. The box-type oil seal applicable to higher rotating speed according to claim 3, wherein the first seal lip (501), the inner frame (3) and the bottom edge thereof enclose to form a first dust-proof enclosed space (801), the first seal lip (501), the second seal lip (502), the inner frame (3) enclose to form a second dust-proof enclosed space (802), the second seal lip (502), the bent part of the inner frame (3) and the outer frame (6) enclose to form a third dust-proof enclosed space (803), the third seal lip (503), the fourth seal lip (504), and the inner frame (3) enclose to form a fourth oil-proof enclosed space (804), the fourth seal lip (504), the fifth seal lip (505), and the inner frame (3) enclose to form a fifth oil-proof enclosed space (805), and the fifth seal lip (505), the sixth seal lip (506), and the inner frame (3) enclose to form a sixth oil-proof enclosed space (806), and a seventh oil-sealing-proof space (807) is enclosed by the sixth sealing lip (506), the main sealing lip (507) and the inner framework (3).

5. The box-type oil seal applicable to the higher rotating speed according to claim 4, wherein the inner frame (3) comprises a first inner frame (301) and a second inner frame (302), and the second inner frame (302) is arranged at the upper end of the first inner frame (301) and is matched with the outer frame (6) to form a limiting structure.

6. The box type oil seal applicable to high rotating speed according to claim 5, wherein the cross section of the outer frame (6) is stepped, and the bottom end of the outer frame is provided with a U-shaped groove (9) which forms a limiting structure with the end surface of the inner frame (3).

7. A box type oil seal suitable for high rotating speed according to claim 6, characterized in that the sealing lips (5) are all rubber sealing lips (5).

8. A box type oil seal suitable for high rotating speed according to claim 7, characterized in that the outer side of the outer sealing body (7) is provided with a holding spring (10).