CN114803368A

CN114803368A - Rolling element with good sealing performance

Info

Publication number: CN114803368A
Application number: CN202210403485.3A
Authority: CN
Inventors: 张晓峰; 马兰英; 亓鹏
Original assignee: Shandong Lingxiyuan Technology Development Co ltd
Current assignee: Shandong Lingxiyuan Technology Development Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-07-29

Abstract

The invention relates to the technical field of material conveying, in particular to a rolling body with good sealing performance, which comprises a shell, a ball and an elastic sealing element, wherein an installation cavity is arranged in the shell, the inner wall of the installation cavity is provided with a supporting surface, and the bottom wall of the installation cavity is provided with an installation hole; the ball is arranged in the mounting cavity, the supporting surface supports the ball, and part of the ball extends out of the mounting hole; the elastic sealing element is arranged in the mounting cavity and is provided with a wear-resisting ring which is abutted with the ball. According to the rolling body, the wear-resistant ring is abutted to the ball, so that impurities can be reduced from entering the mounting cavity, the phenomenon that the ball blocks the mounting cavity is reduced, and the wear-resistant ring has wear resistance, is not easy to wear and has long service life.

Description

Rolling element with good sealing performance

Technical Field

The invention relates to the technical field of material conveying, in particular to a rolling body with good sealing performance.

Background

At present, the existing rolling element generally comprises a shell and a ball, wherein the shell forms a mounting cavity, the ball is mounted in the mounting cavity, and part of the ball extends out of the bottom side of the shell and can roll in the mounting cavity. The rolling elements can be used for material conveying device to reduce the resistance of material conveying device operation, for example the rolling elements can be applied to scraper conveyor, scraper conveyor is the conveyor of transport coal and material, includes the chain and installs the scraper blade on the chain usually, and the chain can drive the scraper blade and slide along the chute. However, scraper conveyors are generally used in coal mines and other scenes with poor environmental cleanliness, and chutes generally contain impurities such as coal dust and sludge. The scraper blade is at the operation in-process, and impurity piles up in the running resistance that the impurity that installs the intracavity can increase the ball in the shell of rolling element easily, makes the ball card even in the installation intracavity and be difficult to rotate.

Disclosure of Invention

In order to solve the technical problems, the invention provides the rolling body with good sealing performance, the wear-resistant ring is abutted to the ball, impurities can be reduced from entering the installation cavity, the phenomenon that the ball blocks the installation cavity is reduced, the wear-resistant ring has wear resistance, is not easy to wear and has long service life, and the problems in the prior art are effectively solved.

In order to solve the problems, the invention provides a rolling body with good sealing performance, which comprises a shell, balls and an elastic sealing element. The inner part of the shell is provided with an installation cavity, the inner wall of the installation cavity is provided with a supporting surface, and the bottom wall of the installation cavity is provided with an installation hole; the ball is arranged in the mounting cavity, the supporting surface supports the ball, and part of the ball extends out of the mounting hole; the elastic sealing element is arranged in the mounting cavity and is provided with a wear-resisting ring which is abutted with the ball.

Further, the installation cavity lateral wall has the first annular muscle of inside extension, and first annular muscle is separated the installation cavity for first cavity and second cavity, and first cavity is located the below of second cavity, and the holding surface is located the second cavity, and elastic sealing element installs in first cavity, and the diapire of first cavity is equipped with the mounting hole.

Further, the shell includes the shell body and installs in the annular bottom of shell body bottom, and the edge of annular bottom inwards extends and forms the second annular muscle, and the second annular muscle forms the mounting hole, and the edge of annular bottom top inwards extends and forms first annular muscle, has first cavity between first annular muscle and the second annular muscle.

Further, the top of the wear ring extends between the balls and the first annular rib, and the top of the wear ring separates the balls from the first annular rib.

Further, the wear ring has a partition portion extending into the mounting hole, the partition portion partitioning the ball and a wall of the mounting hole at the mounting hole.

Furthermore, the wear-resisting ring is also provided with an abutting part which is positioned above the separating part and abuts against the bottom wall of the mounting cavity.

Furthermore, the elastic sealing element further comprises an elastic ring, the elastic ring abuts against the wear-resistant ring, and the inner wall of the installation cavity supports the elastic ring.

Furthermore, at least one elastic ring is abutted against one side of the abutting part close to the separating part.

Furthermore, an annular cavity is formed between the inner side of the wear-resisting ring and the outer side of the ball, and the elastic ring abuts against the position, on the annular cavity, of the wear-resisting ring.

Further, the wear-resistant ring is a polytetrafluoroethylene wear-resistant ring or a polyimide wear-resistant ring or a polyamide-imide wear-resistant ring or a polyether-ether-ketone wear-resistant ring.

The wear-resistant ring has the advantages that the wear-resistant ring is abutted to the ball, impurities can be reduced from entering the mounting cavity, the phenomenon that the ball blocks the mounting cavity is reduced, the wear-resistant ring has wear resistance, is not easy to wear and has long service life. The rolling body with good sealing performance effectively solves the problems in the prior art.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic perspective view of a rolling element according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a rolling element according to an embodiment of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a schematic cross-sectional view of a rolling element in another embodiment of the present invention.

Fig. 5 is a partially enlarged schematic view of a portion B in fig. 4.

Wherein: 1. a housing; 101. a mounting cavity; 1011. a first chamber; 1012. a second chamber; 102. a support surface; 103. mounting holes; 104. a first annular rib; 105. a second annular rib; 106. a shell body; 107. an annular bottom cover; 2. a ball bearing; 3. an elastomeric seal; 301. a wear ring; 3011. a partition portion; 3012. an abutting portion; 3013. an annular cavity; 302. an elastic ring.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected to each other by the intermediate structure but connected to each other by the connecting structure to form a whole. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the present invention, "bottom" and "top" are based on the state in which the balls face downward in the drawings.

In the invention, as shown in fig. 1 and fig. 2, a rolling body with good sealing performance is provided, which comprises a housing 1, a ball 2 and an elastic sealing element 3, wherein a mounting cavity 101 is arranged in the housing 1, the inner wall of the mounting cavity 101 is provided with a supporting surface 102, and the bottom wall of the mounting cavity 101 is provided with a mounting hole 103; the ball 2 is arranged in the mounting cavity 101, the supporting surface 102 supports the ball 2, and part of the ball 2 extends out of the mounting hole 103; the elastic seal 3 is attached to the mounting cavity 101, and the elastic seal 3 has a wear ring 301 that abuts against the ball 2.

In order to prevent the ball 2 from wearing the hole wall of the mounting hole 103 during rotation, a clearance is usually provided between the hole wall of the mounting hole 103 and the ball 2. In the rolling element of the invention, the wear-resistant ring 301 is abutted against the ball 2 in the mounting cavity 101, so that the gap between the hole wall of the mounting hole 103 and the ball 2 can be shielded, and further, the impurities from the outside can be reduced from entering the mounting cavity 101 from the gap. In addition, impurities are easily attached to the portion of the ball 2 extending out of the mounting hole 103, and the impurities are easily moved toward the mounting cavity 101 along with the ball 2 during rolling of the ball 2. The wear-resistant ring 301 can block the balls 2 from bringing impurities into the installation cavity 101, and can also scrape impurities on the surfaces of the balls 2 so as to reduce the impurities from entering the installation cavity 101.

Therefore, the elastic sealing element 3 can improve the sealing effect of the rolling element, reduce the impurities entering the installation cavity 101, reduce the phenomenon that the ball 2 blocks the installation cavity 101, and prolong the service life of the whole rolling element. Moreover, when wear of the wear-resistant ring 301 occurs, the elasticity of the elastic seal 3 can compensate for the wear of the wear-resistant ring 301 to make the wear-resistant ring 301 fit the balls 2.

In addition, owing to set up elastic sealing element 3, can prevent that stereoplasm impurity card from between ball 2 and mounting hole 103 pore wall, consequently reduced the wearing and tearing of stereoplasm impurity to ball 2, mounting hole 103 pore wall under this kind of operating mode to can make wear-resisting ring 301, mounting hole 103 pore wall play relatively stable restraint to ball 2, with the running state that keeps ball 2 stable, prevent because 2 irregular motions of ball that the wearing and tearing of mounting hole 103 pore wall lead to.

Furthermore, the elastic sealing member 3 has elasticity, so that the ball 2 can play a role of vibration reduction to a certain extent when moving. Particularly, the ball 2 has the randomness of circumferential rotation when moving, after partial impurities enter between the ball 2 and the wear-resisting ring 301, when the impact force of the ball 2 towards the impurity direction is large, due to the elastic vibration reduction effect, the direct extrusion force of the ball 2 to the impurities is reduced, and the abrasion of the ball 2 can be reduced. When the impact force of the ball 2 in the opposite direction to the foreign matter is large, the pressure of the ball 2 to the foreign matter is also reduced due to the elastic damping effect of the elastic sealing member 3, and the abrasion of the ball 2 can be reduced.

In a preferred embodiment, more specifically, the side wall of the mounting cavity 101 is provided with a first annular rib 104 extending inwards, the first annular rib 104 divides the mounting cavity 101 into a first chamber 1011 and a second chamber 1012, the first chamber 1011 is located below the second chamber 1012, the supporting surface 102 is located in the second chamber 1012, the elastic sealing element 3 is mounted in the first chamber 1011, and the bottom wall of the first chamber 1011 is provided with a mounting hole 103.

The first annular rib 104 can confine the elastic seal 3 in the first chamber 1011 and prevent the elastic seal 3 from moving toward the support surface 102, so that the elastic seal 3 is closer to the mounting hole 103, and impurities entering the mounting cavity 101 from the mounting hole 103 are reduced. In addition, the balls 2 roll against the bearing surface 102 in the second chamber 1012, and the second chamber 1012 may be provided with a lubricating medium to improve the rolling performance of the balls 2 against the bearing surface 102. For example, a plurality of sub-balls may be disposed in the second chamber 1012, the sub-balls may abut on the supporting surface 102 and roll with respect to the supporting surface 102, and the ball 2 abuts on the sub-balls and rolls with respect to the sub-balls, so as to reduce rolling resistance between the ball 2 and the supporting surface 102, reduce wear of the ball 2 and the supporting surface 102, and prolong service life.

More specifically, the housing 1 includes a housing 106 and an annular bottom cover 107 mounted at the bottom of the housing 106, an edge of the bottom of the annular bottom cover 107 extends inward to form a second annular rib 105, the second annular rib 105 forms a mounting hole 103, an edge of the top of the annular bottom cover 107 extends inward to form a first annular rib 104, and a first cavity 1011 is formed between the first annular rib 104 and the second annular rib 105. The shell body 106 and the annular bottom cover 107 are of a split structure, and the first annular rib 104 and the second annular rib 105 are machined on the annular bottom cover 107, so that machining difficulty can be reduced. Furthermore, the annular bottom cover 107 forms a first chamber 1011 which, while closing the bottom of the housing body 106, is also able to support the elastic seal 3.

It should be noted that the position where the first annular rib 104 is disposed is not limited to the above embodiment, and may be formed on the inner wall of the housing body 106. In addition, the specific structure of the annular bottom cover 107 is not limited in this embodiment, and in a preferred embodiment, the annular bottom cover 107 includes an upper cover body forming the first annular rib 104 and a lower cover body forming the second annular rib 105, and the lower cover body abuts against the upper cover body.

More specifically, the top of the wear ring 301 extends between the ball 2 and the first annular rib 104, and the top of the wear ring 301 separates the ball 2 and the first annular rib 104. During the movement of the rolling body, the balls 2 of the rolling body have a tendency to move transversely while rolling. The top of wear-resisting ring 301 can be horizontal retrain ball 2, prevents that ball 2 direct impact from first annular muscle 104, and buffering ball 2 is to the impact force of first annular muscle 104, can prevent ball 2 direct friction first annular muscle 104 moreover, reduces the wearing and tearing of first annular muscle 104. In addition, the top of the wear ring 301 can seal the second chamber 1012, further reducing the entry of impurities into the second chamber 1012, and improving the sealing performance.

In the preferred embodiment, more specifically, the wear ring 301 has a partition 3011 extending into the mounting hole 103, and the partition 3011 partitions the ball 2 from the wall of the mounting hole 103 at the mounting hole 103. The partition 3011 can restrain the ball 2 in the lateral direction, prevent the ball 2 from directly impacting the hole wall of the mounting hole 103 during operation, and buffer the impact force of the ball 2 on the housing 1. Furthermore, when the ball 2 rotates in the mounting hole 103, the wear ring 301 can prevent the ball 2 from directly rubbing against the hole wall of the mounting hole 103, thereby reducing the wear of the hole wall of the mounting hole 103. In addition, impurities are easily attached to the outer surface of the ball 2 in the operation process, when the ball 2 rolls, the separating part 3011 can scrape the impurities on the outer surface of the ball 2, the blocking phenomenon at the mounting hole 103 is reduced, and the impurities brought into the mounting cavity 101 by the ball 2 are reduced.

More specifically, the wear ring 301 further includes an abutting portion 3012 located above the partition portion 3011, and the abutting portion 3012 abuts against the bottom wall of the mounting cavity 101. During rolling of the balls 2, friction force is generated between the balls 2 and the wear-resistant ring 301, and the wear-resistant ring 301 is easily moved by the friction force. The contact portion 3012 prevents the wear ring 301 from moving toward the mounting hole 103 due to friction, prevents the wear ring 301 from separating from the ball 2, and improves the reliability of mounting the wear ring 301 and the ball 2, thereby improving the sealing effect.

In a preferred embodiment, the elastic sealing element 3 further comprises an elastic ring 302, the elastic ring 302 abuts against the wear-resistant ring 301, and the elastic ring 302 is supported by the inner wall of the installation cavity 101. In the operation process of the ball 2, the wear-resistant ring 301 and the ball 2 are continuously rubbed, and after long-time use, the wear-resistant ring 301 is worn to a certain extent, so that a gap exists between the wear-resistant ring 301 and the ball 2. The elastic ring 302 can apply pressure to the wear-resistant ring 301 through elastic deformation, and the wear-resistant ring 301 is pressed on the outer surface of the ball 2, so that the wear-resistant ring 301 is compensated, the gap between the wear-resistant ring 301 and the ball 2 is reduced, the sealing performance is improved, and the service life of the whole elastic sealing element 3 is prolonged.

The form of the elastic seal 3 is not limited to the above embodiment, and for example, the elastic seal 3 may be integrated, that is, the elastic member of the elastic seal 3 and the wear ring 301 may be integrated.

More specifically, at least one elastic ring 302 abuts against the abutting portion 3012 on the side close to the dividing portion 3011. When the partition 3011 is worn, a gap may occur between the partition 3011 and the ball 2, and the elastic ring 302 hoops the wear-resistant ring 301 to urge the partition 3011 to approach the ball 2, so as to reduce the gap between the partition 3011 and the ball 2 and prevent impurities from entering the mounting cavity 101 from the gap.

More specifically, an annular cavity 3013 is formed between the inner side of the wear-resistant ring 301 and the outer side of the ball 2, and the elastic ring 302 abuts against the portion, on the annular cavity 3013, of the wear-resistant ring 301. The thickness of the wear-resisting ring 301 at the annular cavity 3013 is small, deformation is easy to occur, and the elastic ring 302 is easy to press the wear-resisting ring 301 on the balls 2 at the annular cavity 3013, so that the gap between the wear-resisting ring 301 and the balls 2 is reduced, and the sealing effect is improved.

In a preferred embodiment, the wear-resistant ring 301 is a teflon wear-resistant ring 301 or a polyimide wear-resistant ring 301 or a polyamideimide wear-resistant ring 301 or a polyetheretherketone wear-resistant ring 301. The polytetrafluoroethylene wear-resistant ring 301 has good wear resistance, long service life, low friction coefficient and small resistance to the running of the ball 2. In addition, the teflon wear ring 301 is resistant to high temperature, and when the balls 2 and the teflon wear ring 301 rub to generate heat, the teflon wear ring 301 is not easy to damage. Similarly, the polyimide wear-resistant ring 301, the polyamideimide wear-resistant ring 301, and the polyetheretherketone wear-resistant ring 301 also have wear resistance, and can lubricate the balls 2 and seal the mounting cavity 101.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A rolling element with good sealing performance is characterized by comprising:

the mounting structure comprises a shell, a mounting cavity is arranged in the shell, a supporting surface is arranged on the inner wall of the mounting cavity, and a mounting hole is formed in the bottom wall of the mounting cavity;

the ball is arranged in the mounting cavity, the supporting surface supports the ball, and part of the ball extends out of the mounting hole;

an elastomeric seal mounted to the mounting cavity, the elastomeric seal having a wear ring in abutment with the ball.

2. The rolling element with good sealing performance as claimed in claim 1, wherein the side wall of the mounting cavity is provided with a first annular rib extending inwards, the first annular rib divides the mounting cavity into a first cavity and a second cavity, the first cavity is located below the second cavity, the supporting surface is located in the second cavity, the elastic sealing element is mounted in the first cavity, and the bottom wall of the first cavity is provided with the mounting hole.

3. The rolling element of claim 2, wherein the outer casing comprises a casing body and an annular bottom cover mounted on the bottom of the casing body, the bottom of the annular bottom cover has an edge extending inward to form a second annular rib, the second annular rib forms the mounting hole, the top of the annular bottom cover has an edge extending inward to form the first annular rib, and the first cavity is formed between the first annular rib and the second annular rib.

4. The rolling element of claim 2, wherein the top of the wear ring extends between the balls and the first annular rib, and the top of the wear ring separates the balls and the first annular rib.

5. The rolling element as claimed in claim 1, wherein the wear ring has a partition extending into the mounting hole, the partition separating the ball from a wall of the mounting hole at the mounting hole.

6. The rolling element with good sealing performance as claimed in claim 5, wherein the wear-resistant ring further has an abutting portion located above the partition portion, and the abutting portion abuts against the bottom wall of the mounting cavity.

7. The rolling element with good sealing performance as claimed in any one of claims 1 to 6, wherein the elastic sealing element further comprises an elastic ring, the elastic ring abuts against the wear-resistant ring, and the inner wall of the mounting cavity supports the elastic ring.

8. The rolling element with good sealing performance as claimed in claim 7, wherein at least one elastic ring abuts against one side of the abutting part close to the partition part.

9. The rolling element of claim 7, wherein an annular cavity is formed between the inner side of the wear-resistant ring and the outer side of the ball, and the elastic ring abuts against the wear-resistant ring at the position of the annular cavity.

10. The rolling element with good sealing performance as claimed in claim 1, wherein the wear-resistant ring is a polytetrafluoroethylene wear-resistant ring or a polyimide wear-resistant ring or a polyamideimide wear-resistant ring or a polyetheretherketone wear-resistant ring.