WO2015009007A1

WO2015009007A1 - Oilless linear sliding bearing

Info

Publication number: WO2015009007A1
Application number: PCT/KR2014/006348
Authority: WO
Inventors: 정희철
Original assignee: Jung Heechul
Priority date: 2013-07-15
Filing date: 2014-07-15
Publication date: 2015-01-22

Abstract

An oilless linear sliding bearing according to the present invention comprises: a cylindrical body provided with an inner space so as to be penetratable by a shaft; first and second fitting grooves formed at a specific depth from two end portions of the body; first and second press-fitted rings respectively fitted into the first and second fitting grooves; a plurality of insertion grooves which are connected from the first fitting groove to the second fitting groove but are formed separated and away at a specific distance from each other; and a plurality of filler members inserted into each of the insertion grooves.

Description

Lubrication free plain bearing

The present invention relates to a non-lubricated linear sliding bearing, and more particularly, to a clean maintenance place that should minimize the generation of thermal power plants, food production equipment, underwater (including seawater), desert wind, cold (winter) or other dust generation It is a technology for oil-free linear sliding bearings that can be safely used and reduce the maintenance cost.

In general, the propulsion shaft of the power transmission system is supported to allow rotation and linear movement through the bearing. The propulsion shaft bearing can be classified into a sliding bearing and a rolling bearing according to the contact state. . The sliding bearing has a shape in which the bearing surrounds all or part of the surface of the journal portion, and lubricant is applied to reduce the friction between the bearing and the contact surface of the journal portion.

Since the sliding bearing maintains contact between the surfaces, it is mainly used when the power transmitted is large because the friction coefficient and the ability to support the load during rotation of the propulsion shaft are large. For example, in the case of relatively large loads such as ships, offshore structures, power plants, etc., the propulsion shaft provided in the power transmission system uses a propulsion shaft bearing in the form of a sliding bearing.

In order to achieve high strength and high wear resistance of the bearing, ferrous metal powder (copper powder is mixed with iron powder as the main component, and other metal powder such as nickel and tin is selectively mixed on the surface of steel base made of carbon steel or steel steel, etc.). Powder), and fine powders of solid lubricants such as graphite, molybdenum disulfide, and tungsten disulfide are cold pressed by a press or rolling roller, etc. Many sliding bearings having a solid-phase sintered layer are introduced as a prior art.

As an example, Korean Patent No. 10-286246 discloses a sliding bearing having a steel-based iron-based sintered solid sintered layer as described above. In addition, Korean Patent No. 10-286246 is a steel back metal, and is bonded to the steel back metal at the same time and sintered at 1065 ℃ ~ 1095 ℃, 10 to 30 parts by weight, the iron-based alloy layer of the remainder of iron, iron It comprises a dry lubricant contained in the small bond layer, and the dry lubricant is a sliding bearing, characterized in that at least any one of 0.1 parts to 6.5 parts by weight of graphite or 0.1 parts to 7.0 parts by weight of molybdenum disulfide. .

As another example, Korean Patent No. 10-707694 discloses a sliding bearing in which a mixed powder of an iron-based metal powder and a solid lubricant powder is coated on a friction side surface of a steel substrate to form a sintered layer, wherein the sintered layer is self-supporting in the sintering furnace. Disclosed is a sliding bearing having a solid sintered layer, characterized in that the solid sintering at a temperature of 600 ℃ ~ 1060 ℃ inside the mold, and molded by pressing in a predetermined pressure range in the mold during the solid sintering process.

These sliding bearings are lubricated by the solid lubricant powder contained in the sintered layer. However, when the sintered layer is formed using the iron-based metal powder as described above, the sintered layer is thin and rusts in a short period of time when used as a device or a machine part operated in water, such as a pumping station, to perform a lubrication function. There is this. In addition, one of the major disadvantages of these sliding bearings is that the bearing inner diameter and the propulsion shaft are directly frictionally rotated, so that the bearings and the propulsion shafts can be subjected to separate precision machining (manufacturing) according to the use location, area, temperature, etc. This is necessary, very difficult to manage, and the risk of damage to the propulsion shaft is very high. As a result, assembly and disassembly are very difficult and difficult.

The present invention has been proposed to solve the above problems, the object of the present invention is to clean the thermal power plant, underwater (including seawater), desert sand breeze, cold area (winter) food manufacturing apparatus or other dust generation to minimize Its purpose is to provide oil-free linear sliding bearings that can be safely used in maintenance locations and reduce maintenance costs.

Another object of the present invention is to provide a non-lubricated linear sliding bearing which is excellent in heat resistance and corrosion resistance, easy to assemble and disassemble, and absorbs external shocks and vibrations, thereby ensuring reliable and predictable life without accidental breakage. Its purpose is to.

In order to achieve the above object, the non-lubricated linear sliding bearing according to an aspect of the present invention, the cylindrical body in which the inner space is formed so that the shaft penetrates, and formed at a predetermined depth (depth) from both ends of the body 1, the second fitting groove, the first and second press-fit ring fitted in the first and second fitting groove, respectively, and a plurality of inserts are formed spaced apart at regular intervals from the first fitting groove to the second fitting groove And a plurality of filler members respectively inserted into the grooves and the plurality of insertion grooves.

In the non-lubricated linear sliding bearing according to another aspect of the present invention, a plurality of grooves are formed on the outer circumferential surface of the body to be spaced apart by a predetermined distance, and the filler member is a teflon filler of a round bar, and the body and the first and second press-fit rings are made of aluminum or stainless steel. It is characterized in that it is implemented in steel (AL & STS).

According to the above configuration, the present invention has the following effects.

First, the oil-free linear sliding bearing of the present invention is implemented so that a plurality of pillar members inserted into a plurality of insertion grooves formed in the body to act as a conventional linear ball bearing, to replace the linear motion and the conventional solid sliding bearing, linear ball bearing It can be used as a bearing of new product standard that can be used.

Second, the oil-free linear sliding bearing of the present invention is required to refuel the oil (OIL) because the friction coefficient (0.07) due to the self-rotation movement is low and the friction coefficient hardly changes with the use time as a plurality of filler members are used. It is economical and easy to maintain.

Third, the oil-free linear sliding bearing of the present invention does not generate dust or rust in the bearing itself during the linear movement, there is no dust or rust does not occur in the food manufacturing apparatus or other clean dust place to be installed in a clean maintenance place to minimize the low speed rotation Can be used on equipment. In addition, the oil-free linear sliding bearing of the present invention does not use oil (OIL), it can be used in a lot of water (including sea water) and wet areas. In addition, the oil-free linear sliding bearing of the present invention is not damaged or deteriorated by dust, sand, iron scrap and the like.

Fourth, the oil-free linear sliding bearing of the present invention does not need a separate seal for preventing the inflow of foreign matters and is designed in such a way that the foreign matters can be immediately discharged. (Keep space on outer filler round bar and shaft)

Fifth, the oil-free linear sliding bearing of the present invention is implemented to have a wide use temperature range of -240 ℃ to +288 ℃ irrespective of the size or load increase, it is excellent in heat resistance.

Sixth, the body of the non-lubricated linear sliding bearing of the present invention and the first and second press-fit rings are made of aluminum or stainless steel (AL & STS), and the plurality of filler members are implemented by Teflon fillers to provide excellent corrosion resistance of the bearings.

Seventh, the oil-free linear sliding bearing of the present invention absorbs shock and vibration relatively well compared to the conventional linear ball bearings and the conventional sliding bearings (e.g., oils), so there is no accidental breakage, resulting in high reliability and predictable life. To ensure.

1 shows the appearance of an oil-free linear sliding bearing according to the present invention.

2 is an exploded view of an oil-free linear sliding bearing according to the present invention.

3 illustrates a process for manufacturing an oil-free linear sliding bearing according to the present invention.

[Description of the code]

100: Lubrication free plain bearing

110: body

111: first fitting groove 112: second fitting groove

113: home

121: insertion groove

130: filler round bar

150: press-fit ring

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

Figure 1 shows the appearance of the lubrication-free linear sliding bearing according to the present invention, Figure 2 is an exploded view of the lubrication-free linear sliding bearing according to the present invention. 1 and 2, the oil-free linear sliding bearing 100 according to the present invention is a cylindrical body 110, the plurality of pillar members 130, the inner space is formed so that the shaft is large through; It is implemented including a press-in ring 150.

The cylindrical body 110 is made of aluminum or stainless steel (AL & STS). The cylindrical body 110 is formed with fitting grooves 112 formed at a predetermined depth from both ends thereof. In addition, the cylindrical body 110 is formed with a plurality of insertion grooves 121 are formed spaced at a predetermined interval. A plurality of grooves 113 are formed on the outer circumferential surface of the cylindrical body 110 by a predetermined distance.

The filler member 130 is inserted into each of the plurality of insertion grooves 121. The filler member 130 serves as a conventional linear ball bearing and is implemented by a round rod teflon filler. Teflon fillers reduce friction during linear motion, provide excellent chemical resistance and prevent static electricity. The press-fit ring 150 is made of aluminum or stainless steel (AL & STS). The press-fit ring 150 is fitted into the first and

second fitting grooves

111 and 112, respectively.

The process of manufacturing the oil-free linear sliding bearing according to the present invention is as shown in FIG. First, as shown in (a) to form a plurality of insertion grooves 121 are formed spaced at regular intervals in the cylindrical body 110 made of aluminum or stainless steel (AL & STS). Thereafter, as shown in (b), the first and

second fitting grooves

111 and 112 are formed at predetermined depths from both ends of the cylindrical body 110.

Then, as shown in (c) is inserted into a plurality of insertion grooves 121 of the cylindrical body 110, the filler member 130 implemented with a Teflon filler of the round bar, and as shown in (d) Insert the press-fit ring 150 into the first and second

fitting grooves

111 and 112, respectively.

Thus far, the present specification has been described with reference to the embodiments shown in the drawings so that those skilled in the art to which the present invention pertains can easily understand and reproduce the present invention. Those skilled in the art will understand that various modifications and equivalent other embodiments are possible from the embodiments of the present invention. Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

Claims

A cylindrical body in which an inner space is formed to penetrate the shaft;

First and second fitting grooves formed at a predetermined depth from both ends of the body;

First and second press-fit rings fitted in the first and second fitting grooves, respectively;

A plurality of insertion grooves connected from the first fitting groove to the second fitting groove and spaced apart at a predetermined interval; And

A plurality of filler members respectively inserted into the plurality of insertion grooves;

Lubrication-free linear sliding bearing comprising a.
The method according to claim 1,

Oil-free linear sliding bearing, characterized in that a plurality of grooves are formed on the outer peripheral surface of the body to be spaced apart by a predetermined distance.
The method according to claim 1,

The body and the first and second press-fit ring is a non-lubricated linear sliding bearing, characterized in that implemented in aluminum or stainless steel (AL & STS).
The method according to claim 1,

The filler member is a non-lubricated linear sliding bearing, characterized in that the round teflon filler.