CN211039028U

CN211039028U - Sliding bearing

Info

Publication number: CN211039028U
Application number: CN201922230248.8U
Authority: CN
Inventors: 黄红涛; 徐文博
Original assignee: Zhengzhou Research Institute of Mechanical Engineering Co Ltd
Current assignee: Zhengzhou Research Institute of Mechanical Engineering Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-07-17
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses a sliding bearing, including bearing body and lubricated runner, be equipped with the drainage groove on the terminal surface of bearing body, lubricated runner is located on the bearing body hole, lubricated runner sets to reverse spiral shell form and end and is equipped with and has seted up the drainage mouth, lubricated runner head end with the drainage groove links to each other. Lubricated runner becomes reverse heliciform and sets up on the hole of bearing body, can increase the fuse-element memory space, under complicated operating modes such as high viscosity, also can guarantee lubricated effect, has prevented local sliding contact, appears the emergence of phenomenon such as local dry friction or sintering. Namely, the utility model discloses the lubricated effect of slide bearing, the life-span of having improved slide bearing have been strengthened.

Description

Sliding bearing

Technical Field

The utility model relates to a bearing, in particular to a slide bearing for melt pump.

Background

In the melt gear pump for conveying high-temperature, high-pressure and high-viscosity melt in the plastic industry, a bearing of the melt gear pump cannot be lubricated in a lubricating oil or lubricating grease mode, an inner hole of the bearing arranged in the melt gear pump is in clearance fit with the outer peripheral surface of a shaft neck of a gear shaft, and the inner end surface of the bearing is in clearance fit with the end surface of a gear shaft, proper lubricating flow channels are needed among the matching surfaces to ensure that proper melt is used as a lubricating medium between the matching surfaces which run relatively, and dry friction, sintering or gluing between the matching surfaces are avoided.

At present, the lubricated runner that domestic melt gear pump bearing adopted is mostly the cylindrical groove that has a certain contained angle with the gear shaft axis, the groove structure of this kind of runner, the holding surface at gear shaft bearing position has been reduced to a certain extent, and the effective length of lubricated runner is limited by the width of bearing, but abundant fuse-element is not many in the lubricated runner on the bearing internal diameter, under complicated operating modes such as high viscosity, when being insufficient to guarantee lubricated effect, local sliding contact easily produces in the fitting surface of the two, the emergence of phenomena such as local dry friction or sintering appears, reduce the reliability of melt gear pump. Therefore, there is a need for improvement of the prior art to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a fuse-element gear pump and slide bearing thereof realizes through following technical scheme particularly:

a slide bearing, including bearing body and lubricated runner, be equipped with the drainage groove on the terminal surface of bearing body, lubricated runner is located on the bearing body hole, reverse spiral shell form and terminal the opening of having seted up of lubricated runner is set to, lubricated runner head end with the drainage groove links to each other.

According to the prior scheme, the end face of the bearing body is further provided with an unloading groove, and the unloading groove and the drainage groove are arranged at a distance to block connection of the unloading groove and the drainage groove.

According to the prior scheme, the end face of the bearing body is provided with a plurality of shallow grooves.

Preferably, the plurality of shallow grooves are radially arranged on the end face of the bearing body.

Preferably, the diameter of the discharge port is 1-3 mm.

According to the prior scheme, a platform parallel to the axis of the bearing body is arranged on the outer circumference of the bearing body, and a fixing groove is formed in the platform.

The utility model has the advantages that: lubricated runner becomes reverse heliciform and sets up on the hole of bearing body, can increase the fuse-element memory space, under complicated operating modes such as high viscosity, also can guarantee lubricated effect, has prevented local sliding contact, appears the emergence of phenomenon such as local dry friction or sintering. Other advantageous effects of the present invention will be further described with reference to the following embodiments.

Drawings

The invention will be further described with reference to the following figures and examples:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a detailed view at a.

Detailed Description

As shown in the figure: a slide bearing, including bearing body 1 and lubricated runner 2, be equipped with drainage groove 3 on the terminal surface of bearing body, lubricated runner 2 is located on the bearing body hole, lubricated runner 2 sets to reverse spiral shell form and end and is equipped with and has seted up drainage mouth 4, lubricated runner 2 head end with drainage groove 3 links to each other. Lubricated runner 2 head end with drainage groove 3 links to each other, through drainage groove 3 with the melt introduce reverse spiral form in, guaranteed bearing body hole and the continuous supply of axle cooperation department fuse-element, can set reverse spiral to a plurality of rings or a round partly, lubricated runner 2 storage has sufficient fuse-element, produce certain frictional resistance under the effect of frictional force, prevent that the high pressure fuse-element in high pressure region passes through the lubricated runner 2 of reverse spiral of bearing inner wall and excessively reveals the low pressure chamber of fuse-element gear pump, can improve the volumetric efficiency of fuse-element pump to a certain extent. Furthermore, the end of the lubricating flow channel 2 on the bearing body inner hole on the back of the bearing of the sliding bearing is provided with a small leakage port 4 to guide the lubricating melt to flow into a low-pressure cavity of the melt gear pump, so that a slow and complete melt lubricant circulation channel is formed, and the denaturation caused by long-time stagnation of the melt is avoided. Further, the backward spiral shell form lubrication flow channel 2 in the fuse-element is more easily brought into the cooperation region of the hole of axle journal and bearing body, very big improvement the lubricated effect of melt pump. The inventor develops through long-term practice and long-term experiments that the leakage effect is good when the diameter of the leakage port 4 is 1-3mm, and the favorable residence time of the melt in the matching area can be ensured to be leaked before the melt is deteriorated.

In this embodiment, the end surface of the bearing body is further provided with an unloading groove 5, and the unloading groove 5 and the drainage groove 3 are arranged at a distance from each other to block the connection therebetween. The end face drainage groove 3 of the sliding bearing is not directly communicated with the unloading groove 5, pressure fluctuation caused by pressure pulsation caused by gear meshing change to a melt filled as a lubricating medium in a lubricating area is reduced, and the stability of the thickness of a lubricating medium film is improved.

In this embodiment, the end surface of the bearing body is provided with a plurality of shallow grooves 6. Preferably, the plurality of shallow grooves 6 are radially arranged on the end face of the bearing body. The end face of the sliding bearing is provided with a plurality of radiating shallow grooves 6, so that a certain lubricating melt can be stored, the lubricating effect of the end face is improved, and the phenomena of dry friction, burning or gluing of the end face are reduced.

In this embodiment, a platform 7 parallel to the axis of the bearing body 1 is disposed on the outer circumference of the bearing body 1, and a fixing groove 8 is disposed on the platform 7. When the sliding bearings are assembled together with the shaft in pairs, appropriate fixing pins or key bars (not marked in the figure) are arranged in the fixing grooves 8, so that the installation and adjustment positions of the two sliding bearings which are installed in pairs can be fixed, the sliding bearings cannot be skewed and rotated in work, the working positions of the unloading grooves are stabilized and not changed, the local unbalance loading of the tooth surface caused by the deviation of the axes of the gears from the parallel state is effectively avoided, the risk of increasing gluing or pitting is also effectively avoided, and the reliability of the melt gear pump is improved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A sliding bearing comprises a bearing body and a lubricating flow passage, and is characterized in that: the end face of the bearing body is provided with a drainage groove, the lubricating flow channel is arranged on an inner hole of the bearing body, the lubricating flow channel is arranged into a reverse spiral shape, the tail end of the lubricating flow channel is provided with a drainage port, and the head end of the lubricating flow channel is connected with the drainage groove.

2. A plain bearing according to claim 1, characterized in that: the end face of the bearing body is also provided with an unloading groove, and the unloading groove and the drainage groove are arranged at a distance to block the connection of the unloading groove and the drainage groove.

3. A plain bearing according to claim 1, characterized in that: the end face of the bearing body is provided with a plurality of shallow grooves.

4. A plain bearing according to claim 3, wherein: the plurality of shallow grooves are arranged on the end face of the bearing body in a radiation mode.

5. A plain bearing according to any one of claims 1 to 4, characterized in that: the diameter of the discharge opening is 1-3 mm.

6. A plain bearing according to any one of claims 1 to 4, characterized in that: the bearing is characterized in that a platform parallel to the axis of the bearing body is arranged on the outer circumference of the bearing body, and a fixing groove is formed in the platform.