CN211039669U

CN211039669U - Oil seal suitable for rotating shaft with higher rotating speed

Info

Publication number: CN211039669U
Application number: CN201922005214.9U
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: 2020-07-17
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses an oil blanket suitable for rotation axis 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, third seal lip (503), first seal lip (501), second seal lip (502), third seal lip (503) cross-section are the rectangle, all with 45 degrees angles and contact surface contact, all can reduce friction area.

Description

Oil seal suitable for rotating shaft with higher rotating speed

Technical Field

The utility model relates to a mechanical oil seal field, especially an oil blanket suitable for rotation axis rotational speed is higher.

Background

At present, in the design of oil seals, a plurality of application schemes exist, but due to the structure of the oil seals, the existing oil seals are easy to cause serious abrasion of sealing lips for the structure with higher rotating speed, so that the sealing performance of the oil seals is poor, and the larger friction of the oil seals is not beneficial to the rotation of a mechanical structure.

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 an oil blanket that is applicable to the rotation axis rotational speed is higher.

The technical scheme of the utility model is that, the oil seal suitable for the rotation axis rotation speed is higher, including the inner oil seal body, the outer oil seal body sets up in the outside of the inner oil seal body, wherein, the inner oil seal body includes inner frame and inner seal body, the inner seal body attaches the outside with inner frame, the outer oil seal body includes outer frame and outer seal body, the bending of inner frame, outer frame, and cooperate with inner frame, outer frame to form spacing structure, the outer seal body attaches on with 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 outer seal body, be equipped with first seal lip, second seal lip, third seal lip of inner seal body, be equipped with fourth seal lip, fifth seal lip, sixth seal lip, seventh seal lip on the outer seal body, the fourth seal lip cross-section is the toper, and the toper tip contacts with the contact surface, first seal lip, second seal lip, third seal lip, fourth seal lip, fifth seal lip, sixth seal lip, seventh seal lip cross-section are the rectangle, all contact with 45 degrees angles and contact surface, all can reduce friction area.

Further, the seal lip encloses each other with seal lip, inner frame, exoskeleton and forms first dustproof enclosure space, second dustproof enclosure space, third dustproof enclosure space, fourth oil-proof enclosure space, fifth oil-proof enclosure space, sixth oil-proof enclosure space, seventh oil-proof enclosure space.

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 explaining the structure of the outer framework, the section of the outer framework is in a step shape, the bottom end of the outer framework is provided with a U-shaped groove, and the U-shaped groove and the end surface of the inner framework form a limiting structure.

Preferably, the second inner frame is designed to be a convex top and is suitable for an optical axis and a stepped shaft.

Further, the sealing lips are all rubber sealing lips.

The dustproof and oil-proof 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 oil-proof closed spaces, so that a plurality of dustproof and oil-proof barriers are formed, and a large amount of oil is coated on each structure to be matched with the dustproof closed spaces and the oil-proof closed spaces to form a good dustproof and oil-proof 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. the section of the fourth sealing lip is conical, the conical tip is in contact with the contact surface, the sections of the first sealing lip, the second sealing lip, the third sealing lip, the fourth sealing lip, the fifth sealing lip, the sixth sealing lip and the seventh sealing lip are rectangular and are in contact with the contact surface at an angle of 45 degrees, the friction area and the pressure of the sealing lips are reduced, and the loss caused by friction is reduced.

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 seventh sealing 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 dust-tight enclosure; 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. 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 an oil blanket suitable for rotation axis 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 and be located the space that outer skeleton 6 terminal surface and inner frame 3 terminal surface formed on outer skeleton 6, be equipped with 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, a second sealing lip 502 and a third sealing lip 503, the outer sealing body 7 is provided with a fourth sealing lip 504, a fifth sealing lip 505, a sixth sealing lip 506 and a seventh sealing lip 507, the first sealing lip 501, the inner framework 3 and the bottom edge of the inner framework enclose a first dustproof closed space 801, the second sealing lip 502 and the inner framework 3 enclose a second dustproof closed space 802, the second sealing lip 502, the third sealing lip 503 and the inner framework 3 enclose a third dustproof closed space 803, the third sealing lip 503, the fourth sealing lip 504, the inner framework 3 and the outer framework 6 enclose a fourth dustproof closed space 804, the fourth sealing lip 504, the fifth sealing lip 505 and the inner framework 3 enclose a fifth dustproof closed space 805, the fifth sealing lip 505, the sixth sealing lip 506 and the inner framework 3 enclose a sixth oil-proof closed space 806, the sixth sealing lip 506, the fifth sealing lip 505, the seventh sealing lip 507 and the inner framework 3 enclose a sixth oil-proof closed space 806, The seventh sealing lip 507 and the inner framework 3 enclose a seventh oil-proof sealed space 807, the position relation and the function of the sealing lip 5 are described in detail, when the oil seal works, dust or other pollutants in the air can enter the first dust-proof sealed space 801, the first dust-proof sealed space 801 is filled with oil 10, when the oil seal works, the temperature is raised due to rotation, the oil 10 in the sealed space is thermally expanded, the first sealing lip 501 is subjected to pressure, the pressure of the first sealing lip 501 on the inner framework 3 is increased, the tightness of the first dust-proof sealed space 801 is increased, the dust or other pollutants in the air is reduced from entering the second dust-proof sealed space 802, the third dust-proof sealed space 803 and the fourth dust-proof sealed space 804 have the same working principle, a multilayer dust-proof function is achieved, when the oil seal works, the seventh sealing lip 507 can prevent the oil 10 from entering the seventh oil-proof sealed space 807, oil 10 has been filled with in the sixth grease proofing enclosure 806, the oil blanket is at the during operation, because of rotatory can the intensification, make the oil 10 thermal expansion in the enclosure, sixth seal lip 506 receives pressure, make the pressure grow of sixth seal lip 506 to inner frame 3, the leakproofness of increase seventh grease proofing enclosure 807, reduce the inside oil of machine and enter into sixth grease proofing enclosure 806, fifth grease proofing enclosure 805, sixth grease proofing enclosure 806 is with theory of operation, play the effect that the inside oil of multilayer is prevented leaking outward of machine.

The cross section of the fourth sealing lip 504 is conical, a conical tip is in contact with a contact surface, the cross sections of the first sealing lip 501, the second sealing lip 502, the third sealing lip 503, the fourth sealing lip 504, the fifth sealing lip 505, the sixth sealing lip 506 and the seventh sealing lip 507 are cylindrical, and are in contact with the contact surface at an angle of 45 degrees, so that the friction area can be reduced, the structural shape of each sealing lip 5 is introduced, the design is suitable for an 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, second inner frame 3 sets up to the design of protruding top, be applicable to optical axis and step shaft, seal lip 5 is rubber seal lip 5, the structural position of the inside skeleton of oil blanket has mainly been introduced to this part.

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 the oil 10, when the oil seal works, the temperature of the oil seal rises due to rotation, the oil 10 in the closed space is 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 third dust-proof closed space 803 and the fourth dust-proof closed space 804 have the same working principle, the multi-layer dust-proof effect is achieved, when the oil seal works, the seventh sealing lip 507 can prevent the oil 10 from entering the seventh oil-proof sealed space 807, the sixth oil-proof closed space 806 is filled with the oil 10, when the oil seal works, the temperature of the oil seal rises due to rotate, the oil seal in the closed space 10 is thermally expanded, the pressure on the sixth sealing lip 506 is increased, so that the pressure on the inner frame 3 by the sixth sealing lip 506 is increased, the tightness of the seventh oil-proof closed space 807 is increased, the oil in the machine is prevented from entering the sixth oil-proof closed space 806, and 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.

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 an oil blanket suitable for rotation axis rotational speed is higher, its characterized in that, including 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), interior seal (4) be equipped with first seal lip (501), second seal lip (502), third seal lip (503), first seal lip (501), second seal lip (502), third seal lip (503) cross-section are the rectangle, all with 45 degrees angles and contact surface contact, all can reduce friction area.

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

3. The oil seal applicable to the high rotating speed of the rotating shaft according to claim 2, wherein a fourth seal lip (504), a fifth seal lip (505), a sixth seal lip (506) and a seventh seal lip (507) are arranged on the outer seal body (7), the section of the fourth seal lip (504) is conical, the conical tip is in contact with the contact surface, the sections of the fourth seal lip (504), the fifth seal lip (505), the sixth seal lip (506) and the seventh seal lip (507) are rectangular, the contact angles of the fourth seal lip, the fifth seal lip (505), the sixth seal lip (506) and the seventh seal lip are all 45 degrees, and the friction area can be reduced.

4. An oil seal suitable for a rotating shaft with a high rotating speed according to claim 2, wherein the sealing lip (5), the inner frame (3) and the outer frame (6) mutually enclose to form a first dust-proof enclosed space (801), a second dust-proof enclosed space (802), a third dust-proof enclosed space (803), a fourth oil-proof enclosed space, a fifth oil-proof enclosed space (805), a sixth oil-proof enclosed space (806) and a seventh oil-proof enclosed space (807).

5. The oil seal applicable to the high rotating speed of the rotating shaft as claimed in claim 2, 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. An oil seal suitable for a rotary shaft with a high rotation speed according to claim 2, wherein the cross section of the outer frame (6) is stepped, and a U-shaped groove (9) is formed at the bottom end of the outer frame to form a limiting structure with the end surface of the inner frame (3).

7. An oil seal suitable for high rotation speed of a rotating shaft according to claim 5, wherein the second inner frame (302) is configured in a convex design suitable for an optical axis and a stepped axis.

8. An oil seal suitable for high rotation speed of a rotating shaft according to claim 2, wherein the sealing lips (5) are all rubber sealing lips (5).