CN111219417A

CN111219417A - Conductive oil seal with conductive rubber for railway bearing

Info

Publication number: CN111219417A
Application number: CN202010097873.4A
Authority: CN
Inventors: 周慧; 王亮燕; 周麟; 尹士涛; 郑兆杰; 康鑫
Original assignee: Nanjing Orientleader Technology Co Ltd
Current assignee: Nanjing Orientleader Technology Co Ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-06-02

Abstract

The invention discloses a conductive oil seal with conductive rubber for a railway bearing, which comprises conductive rubber, a conductive adhesive, a metal inner framework and a metal outer framework, wherein the conductive rubber is bonded with the metal outer framework through the conductive adhesive to form an outer oil seal, and a rubber sealing lip of the conductive rubber is tightly contacted with the metal inner framework through pressing; the outer oil seal is tightly matched with the metal inner framework in a press-fitting mode to form a conductive oil seal, the conductive oil seal is arranged in the bearing in a press-fitting mode, the metal inner framework is tightly matched with the bearing inner ring, and the metal outer framework is tightly matched with the bearing outer ring. The invention can lead out the current generated by the rolling in the bearing in time, greatly reduces the damage of the electric corrosion to the bearing, and prolongs the maintenance-free period and the service life of the bearing.

Description

Conductive oil seal with conductive rubber for railway bearing

Technical Field

The invention relates to a conductive oil seal with conductive rubber for a railway bearing, and belongs to the field of bearing sealing.

Background

When the bearing which runs for a long time is disassembled, continuous periodic grooves are generated in the running direction of the rolling surface, and almost all damaged surfaces are obviously densely covered with pits and um-level welding spots through a Scanning Electron Microscope (SEM). The formation of such pits and welds is caused by the occurrence of current discharges between the raceways and the tiny contact points on the surfaces of the rolling elements.

In the process of high-speed running of the railway bearing, friction between the raceway and the rolling body generates electricity, the current breaks down the weak point of an oil film in a full-fluid lubrication state, and the energy generated by electric sparks instantly melts the surfaces of adjacent metals. As the bearing continues to run, the welding spots and pits are also ground flat. The melting and solidification process is repeated multiple times on adjacent surfaces under the action of the continuous current. After a certain period of time, the race track is filled with electroerosion grooves over the entire circumferential direction. This can cause relatively significant bearing vibration, ultimately leading to overall bearing failure.

At present, railway bearing oil seals used at home and abroad do not have the function of guiding current accumulated inside a bearing to the outside, so that the surfaces of rolling bodies of the bearing cannot be prevented from generating electric corrosion pits and welding spots, and the surfaces of the rolling bodies are prevented from generating heat and vibrating due to the pits and the welding spots.

Disclosure of Invention

The invention aims to provide a conductive oil seal with conductive rubber for a railway bearing, which can meet the requirements of the railway bearing for conductive use while meeting the requirements of the bearing for sealing use of railway wagons, common trains, high-speed motor cars, high-speed rails and locomotives, has the surface resistance of less than 0.1 omega, can lead out current generated by rolling in the bearing in time, greatly reduces the damage of electric corrosion to the bearing, and prolongs the maintenance-free period and the service life of the bearing.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a take conductive rubber's conductive oil seal for railway bearing, its includes conductive rubber, conductive adhesive, metal inner frame and metal exoskeleton, conductive rubber through conductive adhesive with the metal exoskeleton bonds and forms outer oil seal together to conductive rubber's rubber seal lip with the tight contact of metal inner frame through the pressure equipment.

Furthermore, the outer oil seal is tightly matched with the metal inner framework through press fitting to form a conductive oil seal.

Furthermore, the conductive oil seal is arranged in the bearing in a press-fitting mode, wherein the metal inner framework is tightly matched with the bearing inner ring, and the metal outer framework is tightly matched with the bearing outer ring.

The invention has the beneficial effects that: the conductive oil seal can lead out the current inside the bearing in time, so that the electric corrosion of the bearing is prevented or greatly reduced, the service life of the bearing is prolonged, the maintenance-free period of the bearing is prolonged, and the maintenance and use cost of the bearing is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic sectional structure of a conductive oil seal.

Fig. 2 is a schematic view of the assembly of the conductive oil seal.

Labeled as: 1-conductive rubber, 2-conductive adhesive, 3-metal inner framework, 4-metal outer framework, 5-outer oil seal, 6-rubber sealing lip, 7-conductive oil seal, 8-bearing, 9-bearing inner ring and 10-bearing outer ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the conductive oil seal with conductive rubber for the railway bearing comprises conductive rubber 1, a conductive adhesive 2, a metal inner framework 3 and a metal outer framework 4, wherein the conductive rubber 1 is bonded with the metal outer framework 3 through the conductive adhesive 2 to form an outer oil seal 5, and a rubber sealing lip 6 of the conductive rubber 1 is in tight contact with the metal inner framework 3 through pressing.

In the invention, the outer oil seal 5 is tightly matched with the metal inner framework 3 through press fitting to form a conductive oil seal 7; the conductive oil seal 7 is arranged in the bearing 8 in a press-fitting mode, wherein the metal inner framework 3 is tightly matched with the bearing inner ring 9, and the metal outer framework 4 is tightly matched with the bearing outer ring 10.

In the invention, the current in the bearing 8 is transmitted to the metal inner framework 3 through the bearing inner ring 9, then transmitted to the conductive rubber 1, then transmitted to the metal outer framework 4 through the conductive adhesive 2, and finally transmitted to the bearing outer ring 10 to lead out the current.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution methods fall within the scope of the present invention.

The parts not involved in the present invention are the same as or can be implemented using the prior art.

Claims

1. The conductive oil seal with the conductive rubber for the railway bearing is characterized by comprising conductive rubber, a conductive adhesive, a metal inner framework and a metal outer framework, wherein the conductive rubber is bonded with the metal outer framework through the conductive adhesive to form an outer oil seal, and a rubber sealing lip of the conductive rubber is in tight contact with the metal inner framework through press fitting.

2. The conductive oil seal with the conductive rubber for the railway bearing as claimed in claim 1, wherein the outer oil seal is tightly fitted with the metal inner frame by press fitting to form the conductive oil seal.

3. The conductive oil seal with the conductive rubber for the railway bearing as claimed in claim 1 or 2, wherein the conductive oil seal is installed in the bearing in a press-fitting manner, wherein the metal inner framework is tightly fitted with the bearing inner ring, and the metal outer framework is tightly fitted with the bearing outer ring.