CN218207508U

CN218207508U - Microfluidic bionic bearing double-lip rubber sealing part

Info

Publication number: CN218207508U
Application number: CN202222007333.XU
Authority: CN
Inventors: 何强; 宁梦遥; 王晓森; 孟亚伟; 万恒诚; 王明武; 许泽华
Original assignee: Civil Aviation Flight University of China
Current assignee: Civil Aviation Flight University of China
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2023-01-03
Anticipated expiration: 2032-08-01

Abstract

The utility model discloses a microfluidic bionic bearing double-lip rubber sealing element, which comprises a metal framework, foamed fluororubber, basal body fluororubber and a storage structure; the foamed fluororubber is bonded on the upper side of the metal framework, and a micro-channel structure is arranged in the foamed fluororubber; the basal body fluororubber is bonded to the lower side of the metal framework; the metal framework is formed by mutually bonding and wrapping foamed fluororubber and matrix fluororubber to jointly form a storage structure, the surfaces of the matrix fluororubber and the foamed fluororubber are provided with scaly bionic structures, and micropores are arranged at the lower concave positions of the scaly bionic structures. The utility model discloses can realize the storage and the release of lubricating oil or lubricating grease according to temperature variation in the course of the work, carry lubricating oil or lubricating grease, guarantee high-efficient lubrication, utilize surface structure to be used for reducing the wearing and tearing in the course of the work simultaneously, avoid sealed inefficacy.

Description

Microfluidic bionic bearing double-lip rubber sealing element

Technical Field

The utility model relates to a bearing seal technical field, concretely relates to bionical bearing of micro-fluidic lips rubber seal spare.

Background

A bearing is a common component in mechanical systems and plays an important role in mechanical operation. In order to improve mechanical efficiency, the bearings need to be lubricated, and further, in order to protect the inside of the bearings from leakage of grease and lubricating oil and prevent foreign matters in the external environment from entering the inside of the bearings, the bearings need to be sealed. The effect of sealing the bearing by adopting the sealing element is often influenced by the temperature, and the effect of sealing the bearing under the high-temperature condition is often unsatisfactory. To improve mechanical efficiency, bearings are often lubricated with lubricating oil or grease.

At present, the double-lip sealing elements adopted by mechanical sealing are mostly simple structures and are single, and lubricating oil or lubricating grease is easy to oxidize, has strong fluidity and is easy to overflow in a high-temperature environment. Over extended periods of rotary operation, wear of the seal surfaces can occur, resulting in seal failure.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model provides a bionical bearing of micro-fluidic lips rubber seal can realize the storage and the release of lubricating oil or lubricating grease according to temperature variation in the course of the work, carries lubricating oil or lubricating grease, has guaranteed high-efficient lubrication, utilizes surface structure to be used for reducing the wearing and tearing in the course of the work simultaneously, avoids sealed inefficacy, has solved the problem of mentioning among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a microfluidic bionic bearing double-lip rubber sealing element comprises a metal framework, foamed fluororubber, matrix fluororubber and a storage structure; the foamed fluororubber is bonded on the upper side of the metal framework, and a micro-channel structure is arranged in the foamed fluororubber; the basal body fluororubber is bonded to the lower side of the metal framework; the metal framework is formed by mutually bonding and wrapping foamed fluororubber and matrix fluororubber to jointly form a storage structure, the surfaces of the matrix fluororubber and the foamed fluororubber are provided with scaly bionic structures, and micropores are arranged at the lower concave positions of the scaly bionic structures.

Preferably, the cross section of the micro-channel structure is in an irregular pore shape, and the micro-channel structures are staggered with each other and criss-cross in the foamed fluororubber.

Preferably, the micro-channel structure is micron-sized, criss-cross, mutually communicated, and communicated with the storage structure.

Preferably, the cross-sectional diameter of the reservoir is greater than 1/3 of the seal cross-sectional dimension and less than 2/3 of the seal cross-sectional dimension; the cross-section of the storage structure is circular.

The utility model has the advantages that: in the utility model, with the rise of temperature, the lubricating oil or the lubricating grease can be partially oxidized, the fluidity is enhanced with the rise of temperature, the change of air pressure difference caused by the temperature can make the lubricating oil or the lubricating grease enter a micro-channel in the foaming fluororubber, and the micro-channel can absorb and release the overflowing lubricating oil or the lubricating grease; the storage structure temporarily stores lubricating oil or lubricating grease; and the rubber surface of the sealing element is of a fish-scale bionic structure, so that the influence of friction and abrasion on the sealing performance can be reduced.

Drawings

FIG. 1 is a diagram illustrating the sealing effect of the sealing member of the present invention;

FIG. 2 is a partial enlarged view of the fish-scale bionic structure of the present invention;

FIG. 3 is a cross-sectional view of the seal;

FIG. 4 is an enlarged view of the seal and bearing roller contact surface;

in the figure, 1-metal skeleton; 2-a foamed fluororubber; 3-base fluororubber; 4-a storage structure; 5-micro flow channel structure; 6-fish scale bionic structure; 7-roller bearings; 8-middle retainer ring; 9-a rubber seal; 10-roller.

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 efforts all belong to the protection scope of the present invention.

The bearing is a common part in mechanical systems, and the present embodiment takes a self-aligning roller bearing as an example, and as shown in fig. 1, the self-aligning roller bearing 7 includes rollers 10 inside, a middle retainer ring 8 for restraining the rollers, and a rubber seal 9 for sealing the bearing.

The utility model provides a microfluidic bionic bearing double-lip rubber sealing element, which can reduce the influence of friction and abrasion on the sealing performance, and as shown in figure 3, the rubber sealing element specifically comprises foamed fluororubber 2, a metal framework 1, a matrix fluororubber 3 and a storage structure 4; the foaming fluororubber 2 is bonded on the upper side of the metal framework 1 through a vulcanization technology, a special micro-channel structure 5 is arranged inside the foaming fluororubber, the size of the micro-channel is micron-sized, and the foaming fluororubber and the surface of the matrix fluororubber have a fish scale-shaped bionic structure 6 as shown in figure 2. The micro-channel with store the structure and be linked together, base member fluororubber bonds at the metal framework downside through vulcanization technique, base member fluororubber with foaming fluororubber bonds mutually, metal framework by foaming fluororubber reaches base member fluororubber parcel, store the structure, 4 by metal framework 1, foaming fluororubber 2 and base member fluororubber 3 form jointly.

Furthermore, the foamed fluororubber and the matrix fluororubber are respectively bonded with the surface of the metal framework by a hot melting technology.

Furthermore, the micro-channels in the interior of the foamed fluororubber are criss-cross and communicated with each other as shown in fig. 4, and the micro-channels can contract and expand to transport lubricating oil or grease with the change of temperature, and in the interior SEM of the foamed fluororubber shown in fig. 4, the areas where small arrows are located are part of the micro-channels. The micro flow channels are distributed uniformly. The direction indicated by the arrow may be the flow direction of the lubricating oil. And sucking the overflowing lubricating oil or lubricating grease under the high-temperature condition, flowing into the storage structure for temporary storage, and continuously and slowly outputting the stored lubricating oil or lubricating grease through the micro-channel after the temperature is reduced, so that the lubricating effect is realized.

The internal storage structure penetrates through three parts of the foamed fluororubber, the metal framework and the matrix fluororubber.

Furthermore, the surfaces of the foamed fluororubber and the fluororubber matrix are pressed into a scaly bionic microstructure by a hot-press molding technology, so that friction is effectively reduced when the bearing roller and the sealing ring are in contact operation.

The lower concave part of the fish scale-shaped bionic structure 6 is provided with micropores.

Further, the cross-sectional diameter of the reservoir 4 is greater than 1/3 of the seal cross-sectional dimension and less than 2/3 of the seal cross-sectional dimension; the storage structure 4 is circular in cross-section.

The lubricating oil or the lubricating grease can be partially oxidized along with the rise of the temperature, the fluidity is enhanced along with the rise of the temperature, the change of the air pressure difference caused by the temperature can enable the lubricating oil or the lubricating grease to enter a micro-channel in the foaming fluororubber, and the micro-channel can absorb and release the overflowing lubricating oil or the overflowing lubricating grease; the storage structure temporarily stores lubricating oil or lubricating grease; and the rubber surface of the sealing element is of a fish-scale bionic structure, so that the influence of friction and abrasion on the sealing performance can be reduced.

Further, the substrate fluororubber 3 comprises the following components in parts by weight: rubber raw material100～1203 to 4 portions of active light magnesium oxide, 5 to 7 portions of calcium hydroxide, 2 to 3 portions of bisphenol AF, 0.5 to 1 portion of triphenyl phosphorus chloride BPP, 30 to 50 portions of N990 carbon black and 3 to 6 portions of silicon dioxide.

Further, the foamed fluororubber 4 comprises the following components in parts by weight: 20 to 30 portions of fluororubber, 40 to 60 portions of molecular sieve, 15 to 30 portions of white carbon black and CaCO ₃ 4 to 6 portions of high-density polybutene, 3 to 6 portions of zinc oxide, 1 to 2 portions of stearic acid, 3 to 5 portions of resin C, 4 to 6 portions of sulfur, 2 to 4 portions of dicumyl peroxide (DCP) and 2 to 6 portions of foaming agent, wherein the total amount is 100 portions.

A preparation method of a microfluidic bionic bearing double-lip rubber sealing element comprises the following steps:

s1, preparing a substrate fluororubber:

heating the open mill to 30 ℃, mixing the fluororubber raw material for 5min, sequentially adding magnesium oxide, calcium hydroxide, bisphenol AF, BPP and carbon black, and thinly passing for 10 times; adding silicon dioxide filler, mixing uniformly and standing for 2h;

s2, preparing the foamed fluororubber:

crushing fluororubber on an open mill, thinly passing through for 5 times, and sequentially adding zinc oxide, stearic acid, resin C5, molecular sieve, white carbon black and CaCO ₃ High density polybutene; then adding sulfur and dicumyl peroxide (DCP) for uniform mixing, and then adding 3-6 parts of foaming agent for uniform mixing;

the roll-milling sequence for preparing the foamed fluororubber has certain influence on the foamed fluororubber, most of particle fillers which are difficult to mix uniformly are added firstly, and the uniformity of the particle fillers can be improved by preferentially adding the particle fillers. And secondly, a vulcanizing agent, a foaming agent and the like are added, the acting time interval of the substances is short, and if the rubber is added too early and vulcanization is carried out without rolling, foaming pores are generated, and the quality of the foamed fluororubber is influenced.

S3, polishing the two sides of the metal framework until the surface is smooth and has no obvious concave-convex;

s4, putting the foamed fluororubber, the matrix fluororubber and the metal framework into a vulcanizing machine for hot melt adhesion, and vulcanizing the fluororubber;

and S5, trimming the vulcanized fluororubber, and then carrying out secondary vulcanization.

Further, the mixing temperature of the step S2 is 25-35 ℃; the vulcanization parameters of step S4 are set as follows: the vulcanizing temperature is 175-180 ℃, the time is 8-12 min, and the vulcanizing pressure is 50-75 MPa.

Further, the temperature of the secondary vulcanization in the step S5 is 225-235 ℃, and the vulcanization time is 15-20 h.

Compared with the prior art, the utility model discloses can realize the storage and the release of lubricating oil or lubricating grease according to temperature variation in the sealing member working process, when the inside temperature of bearing is higher, the inside miniflow of sealing member says and stores the structure inflation, absorbs lubricating grease and lubricating oil, and when the inside temperature of bearing reduced, the inside miniflow of sealing member says and stores the structure shrink, releases the lubrication that lubricating grease and lubricating oil realized the bearing. Meanwhile, the rubber surface of the sealing ring in contact with the bearing roller is of a fish scale-shaped bionic structure, so that the friction between contacts can be effectively reduced, and the wear resistance of the sealing piece is improved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A microfluidic bionic bearing double-lip rubber sealing element is characterized by comprising a metal framework (1), foamed fluororubber (2), matrix fluororubber (3) and a storage structure (4); the foamed fluororubber (2) is bonded on the upper side of the metal framework (1), and a micro-channel structure (5) is arranged in the foamed fluororubber; the basal body fluororubber (3) is adhered to the lower side of the metal framework (1); the metal framework (1) is formed by mutually bonding and wrapping foamed fluororubber (2) and substrate fluororubber (3) to jointly form a storage structure (4), the surfaces of the substrate fluororubber (3) and the foamed fluororubber (2) are provided with fish-scale bionic structures (6), and micropores are arranged at the lower recesses of the fish-scale bionic structures (6).

2. The microfluidic bionic bearing double-lip rubber seal according to claim 1, characterized in that: the cross section of the micro-channel structure (5) is irregular hole shape, and the micro-channel structures are staggered with each other and criss-cross in the foamed fluororubber (2).

3. The microfluidic bionic bearing double-lip rubber seal according to claim 1 or 2, characterized in that: the micro-channel structures (5) are micron-sized, criss-cross, mutually communicated and communicated with the storage structures (4).

4. The microfluidic bionic bearing double-lip rubber seal according to claim 1, characterized in that: the cross-sectional diameter of the storage structure (4) is larger than 1/3 of the cross-sectional dimension of the sealing element and smaller than 2/3 of the cross-sectional dimension of the sealing element; the cross section of the storage structure (4) is circular.