阅读说明：本技术 回转支承用的新型多道密封装置 (Novel multi-channel sealing device for slewing bearing ) 是由 隗寿宏 樊延良 于 2020-07-07 设计创作，主要内容包括：本发明涉及一种回转支承用的新型多道密封装置,包括外圈和内圈,所述外圈和内圈通过滚珠连接,在所述外圈和内圈的对接处安装有上密封机构和下密封机构,该下密封机构的外部安装在所述的外圈上,内部安装在所述的内圈上；所述的上密封机构安装在下密封机构上部的内圈上,与所述的下密封机构之间形成密封腔。本发明的优点是：通过设置上密封机构和下密封机构,实现了多道密封结构,密封严密,有效防水防尘。可以有效防止第一橡胶密封圈从密封槽中脱出；还设置有润滑油道,既能一直为第一橡胶密封圈和第二橡胶密封圈提供润滑、提高其寿命,也能有效避免外界杂质进入。(The invention relates to a novel multi-channel sealing device for a slewing bearing, which comprises an outer ring and an inner ring, wherein the outer ring and the inner ring are connected through a ball, an upper sealing mechanism and a lower sealing mechanism are arranged at the butt joint of the outer ring and the inner ring, the outer part of the lower sealing mechanism is arranged on the outer ring, and the inner part of the lower sealing mechanism is arranged on the inner ring; the upper sealing mechanism is arranged on an inner ring at the upper part of the lower sealing mechanism, and a sealing cavity is formed between the upper sealing mechanism and the lower sealing mechanism. The invention has the advantages that: through setting up sealing mechanism and lower sealing mechanism, realized multichannel seal structure, it is tight to seal, effective waterproof dustproof. The first rubber sealing ring can be effectively prevented from being separated from the sealing groove; and a lubricating oil passage is also arranged, so that lubrication can be always provided for the first rubber sealing ring and the second rubber sealing ring, the service life of the first rubber sealing ring and the second rubber sealing ring is prolonged, and external impurities can be effectively prevented from entering the rubber sealing ring.)

1. The novel multi-channel sealing device for the slewing bearing comprises an outer ring (1) and an inner ring (2), wherein the outer ring (1) and the inner ring (2) are connected through balls (3), and is characterized in that an upper sealing mechanism and a lower sealing mechanism are installed at the butt joint of the outer ring (1) and the inner ring (2), the outer part of the lower sealing mechanism is installed on the outer ring (1), and the inner part of the lower sealing mechanism is installed on the inner ring (2); the upper sealing mechanism is arranged on an inner ring (2) at the upper part of the lower sealing mechanism, and a sealing cavity (17) is formed between the upper sealing mechanism and the lower sealing mechanism.

2. The novel multi-seal device for the slewing bearing according to claim 1, wherein the lower seal mechanism comprises a first rubber seal ring (7) which is integrally formed, a plurality of upper lips (10) and lower lips (11) are arranged on the inner side of the first rubber seal ring (7), the upper lips (10) are arranged on the upper end surface of the first rubber seal ring (7), each upper lip (10) is obliquely arranged towards the outer side, and a space is formed between two adjacent upper lips (10); the lower end face of the first rubber sealing ring (7) is provided with the lower lips (11), each lower lip (11) is arranged in an inward inclined mode, and a space is formed between every two adjacent lower lips (11); the upper lip (10) and the lower lip (11) are both arranged in the sealing ring groove (5) of the inner ring (2); an annular bulge (12) is further arranged on the upper end face of the first rubber sealing ring (7), and the annular bulge (12) corresponds to the upper sealing mechanism; and a screw (8) vertically penetrates through the first rubber sealing ring (7), and the first rubber sealing ring (7) is fixedly arranged at a sinking groove (4) of the outer ring, and the sinking groove (4) is adjacent to the sealing ring groove (5).

3. The novel multi-seal device for the slewing bearing according to claim 2, wherein the upper end surface of the annular protrusion is higher than the upper end surface of the outer ring, and a height difference is formed between the annular protrusion and the outer ring.

4. A novel multi-seal for use in a slewing bearing according to claim 2 or 3, wherein said upper lip (10) forms a first angle (a) with the horizontal plane, said first angle (a) being acute; the lower lip (11) and the horizontal plane form a second included angle (B), the second included angle (B) is an acute angle, and the upper lip (10) and the lower lip (11) are tightly matched with the sealing ring groove (5).

5. The novel multi-seal device for the slewing bearing according to claim 4, wherein the upper seal mechanism comprises a second rubber seal ring (9), a trapezoidal groove is formed in the middle of the second rubber seal ring (9), the second rubber seal ring (9) is sleeved on the periphery of the inner ring (2), the inner wall (13) of the second rubber seal ring (9) is tightly attached to the outer surface of the inner ring (2), the outer edge (14) of the second rubber seal ring (9) is arranged in an outward inclined manner and pressed on the top surface of the outer ring (1), the outer edge (14) of the second rubber seal ring (9) forms a third included angle (D) with the vertical direction, and the third included angle (D) is an acute angle; the annular bulge (12) and the trapezoidal groove form the sealing cavity (17).

6. A novel multi-channel sealing device for a slewing bearing according to claim 2 or 3, wherein a lubricating oil channel (6) is further arranged in the sealing ring groove (5), a lubricating joint (15) is arranged at the upper part of the inner ring (2), an oil inlet of the lubricating joint (15) is connected to a lubricating system, and an oil outlet of the lubricating joint corresponds to the lubricating oil channel (6).

Technical Field

The invention relates to a novel multi-channel sealing device for a slewing bearing, which is used for sealing a bearing.

Background

The slewing bearing is a large bearing capable of bearing comprehensive loads and can simultaneously bear larger axial and radial loads and overturning moments. The slewing bearing is widely applied to the industries of ship equipment, engineering machinery, light industry machinery, metallurgical machinery, medical machinery, industrial machinery and the like.

At present, most of sealing devices of slewing bearings adopt single-layer dustproof rubber plane sealing strips, have simple structures but insufficient waterproof and dustproof performances, and cannot meet the requirements of the slewing bearings on special environments with severe working conditions and serious environmental pollution.

The slewing bearing often makes the slewing bearing raceway lose sealing protection because the dustproof sealing strip of interior outer lane wears out failure or drops in the use, makes the slewing bearing appear that the clearance enlarges, the oil leak, life seriously reduces a series of problems such as life.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a novel multi-sealing device for a slewing bearing, so as to solve the problems of insufficient sealing performance, easy wear failure and easy falling of the traditional slewing bearing sealing structure provided in the background art. The technical scheme of the invention is as follows:

the novel multi-channel sealing device for the slewing bearing comprises an outer ring (1) and an inner ring (2), wherein the outer ring (1) and the inner ring (2) are connected through a ball (3), an upper sealing mechanism and a lower sealing mechanism are installed at the butt joint of the outer ring (1) and the inner ring (2), the outer part of the lower sealing mechanism is installed on the outer ring (1), and the inner part of the lower sealing mechanism is installed on the inner ring (2); the upper sealing mechanism is arranged on an inner ring (2) at the upper part of the lower sealing mechanism, and a sealing cavity (17) is formed between the upper sealing mechanism and the lower sealing mechanism.

The lower sealing mechanism comprises a first rubber sealing ring (7) which is integrally formed, a plurality of upper lips (10) and lower lips (11) are arranged on the inner side of the first rubber sealing ring (7), the upper lips (10) are arranged on the upper end face of the first rubber sealing ring (7), each upper lip (10) is arranged in an outward inclined mode, and a space is formed between every two adjacent upper lips (10); the lower end face of the first rubber sealing ring (7) is provided with the lower lips (11), each lower lip (11) is arranged in an inward inclined mode, and a space is formed between every two adjacent lower lips (11); the upper lip (10) and the lower lip (11) are both arranged in the sealing ring groove (5) of the inner ring (2); an annular bulge (12) is further arranged on the upper end face of the first rubber sealing ring (7), and the annular bulge (12) corresponds to the upper sealing mechanism; and a screw (8) vertically penetrates through the first rubber sealing ring (7), and the first rubber sealing ring (7) is fixedly arranged at a sinking groove (4) of the outer ring, and the sinking groove (4) is adjacent to the sealing ring groove (5).

The upper end face of the annular bulge is higher than the upper end face of the outer ring, and a height difference is formed between the annular bulge and the outer ring.

The upper lip (10) and the horizontal plane form a first included angle (A), and the first included angle (A) is an acute angle; the lower lip (11) and the horizontal plane form a second included angle (B), the second included angle (B) is an acute angle, and the upper lip (10) and the lower lip (11) are tightly matched with the sealing ring groove (5).

The upper sealing mechanism comprises a second rubber sealing ring (9), a trapezoidal groove is formed in the middle of the second rubber sealing ring (9), the second rubber sealing ring (9) is sleeved on the periphery of the inner ring (2), the inner wall (13) of the second rubber sealing ring (9) is tightly attached to the outer surface of the inner ring (2), the outer edge (14) of the second rubber sealing ring (9) is arranged in an outward inclined mode and pressed on the top surface of the outer ring (1), a third included angle (D) is formed between the outer edge (14) of the second rubber sealing ring (9) and the vertical direction, and the third included angle (D) is an acute angle; the annular bulge (12) and the trapezoidal groove form the sealing cavity (17).

A lubricating oil channel (6) is further arranged in the seal ring groove (5), a lubricating joint (15) is arranged at the upper part of the inner ring (2), an oil inlet of the lubricating joint (15) is connected to a lubricating system, and an oil outlet corresponds to the lubricating oil channel (6).

The invention has the advantages that: through setting up sealing mechanism and lower sealing mechanism, realized multichannel seal structure, it is tight to seal, effective waterproof dustproof. The first rubber sealing ring can be effectively prevented from being separated from the sealing ring groove; and a lubricating oil passage is also arranged, so that lubrication can be always provided for the first rubber sealing ring and the second rubber sealing ring, the service life of the first rubber sealing ring and the second rubber sealing ring is prolonged, and external impurities can be effectively prevented from entering the rubber sealing ring.

Drawings

FIG. 1 is a schematic half-section of the main structure of the present invention.

Fig. 2 is a schematic structural view of the outer ring of fig. 1.

Fig. 3 is a schematic view of the inner ring of fig. 1.

Fig. 4 is a schematic structural view of the lower sealing mechanism in fig. 1.

Fig. 5 is a schematic structural view of the upper sealing mechanism in fig. 1.

Detailed Description

The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.

Referring to fig. 1 to 5, the present invention relates to a novel multi-sealing device for a slewing bearing, which includes an outer ring 1 and an inner ring 2, wherein the outer ring 1 and the inner ring 2 are connected through balls 3, an upper sealing mechanism and a lower sealing mechanism are installed at a butt joint of the outer ring 1 and the inner ring 2, the outer part of the lower sealing mechanism is installed on the outer ring 1, and the inner part of the lower sealing mechanism is installed on the inner ring 2; the upper sealing mechanism is arranged on the inner ring 2 at the upper part of the lower sealing mechanism, and a sealing cavity 17 is formed between the upper sealing mechanism and the lower sealing mechanism.

The lower sealing mechanism comprises a first rubber sealing ring 7 which is integrally formed, a plurality of upper lips 10 and lower lips 11 are arranged on the inner side of the first rubber sealing ring 7, the upper end face of the first rubber sealing ring 7 is provided with the upper lips 10, each upper lip 10 is obliquely arranged towards the outer side, and a space is formed between every two adjacent upper lips 10; the lower end face of the first rubber sealing ring 7 is provided with the lower lips 11, each lower lip 11 is arranged in an inward inclined mode, and a space is formed between every two adjacent lower lips 11; the upper lip 10 and the lower lip 11 are both arranged in the sealing ring groove 5 of the inner ring 2; an annular bulge 12 is further arranged on the upper end face of the first rubber sealing ring 7, and the annular bulge 12 corresponds to the upper sealing mechanism; and a screw 8 vertically penetrates through the first rubber sealing ring 7, and the first rubber sealing ring 7 is fixedly arranged at the position of a sunk groove 4 of the outer ring, and the sunk groove 4 is adjacent to the sealing ring groove 5.

The upper end surface of the annular protrusion 12 is higher than the upper end surface of the outer ring 1, and a height difference C is formed between the annular protrusion and the outer ring 1 to prevent the inflow of outside shower water.

The upper lip 10 and the horizontal plane form a first included angle A which is an acute angle; the lower lip 11 and the horizontal plane form a second included angle B which is an acute angle, and the upper lip 10 and the lower lip 11 are tightly matched with the sealing ring groove 5.

The upper sealing mechanism comprises a second rubber sealing ring 9, a trapezoidal groove is formed in the middle of the second rubber sealing ring 9, the second rubber sealing ring 9 is sleeved on the periphery of the inner ring 2, the inner wall 13 of the second rubber sealing ring 9 is tightly attached to the outer surface of the inner ring 2, the outer edge 14 of the second rubber sealing ring 9 is arranged in an outward inclined mode and pressed on the top surface of the outer ring 1, a third included angle D is formed between the outer edge 14 of the second rubber sealing ring 9 and the vertical direction, and the third included angle D is an acute angle; the upper annular bulge 12 and the trapezoidal groove form the sealing cavity 17.

A lubricating oil channel 6 is further arranged in the seal ring groove 5, a lubricating joint 15 is arranged at the upper part of the inner ring 2, an oil inlet of the lubricating joint 15 is connected to a lubricating system (in the prior art), and an oil outlet corresponds to the lubricating oil channel 6.

The working principle of the invention is as follows: lubricating grease is continuously conveyed into the sealing cavity 17 between the first rubber sealing ring 7 and the second rubber sealing ring 9 through the lubricating system (the lubricating grease enters the sealing ring groove through the lubricating grease channel and then enters the sealing cavity), lubrication can be provided for the first rubber sealing ring 7 and the second rubber sealing ring 9 all the time, the service life of the first rubber sealing ring is prolonged, and external impurities can be effectively prevented from entering the sealing cavity.

The lower sealing mechanism is fixed on the outer ring and the inner ring, and the upper sealing mechanism is provided with the upper lip, the lower lip and the annular bulge, so that multi-channel sealing of the outer ring and the inner ring is realized, external dust and impurities are strictly prevented from entering the roller path 16, and meanwhile, lubricating grease is ensured to smoothly enter and be kept in the sealing cavity 17 between the first rubber sealing ring 7 and the second rubber sealing ring 9, and the lubricating grease is prevented from running off.

This scheme still can be used to on the slewing bearing of mixer or collergang, the effect is showing, and simple structure, with low costs.