CN201041196Y

CN201041196Y - Electrical insulation roller bearing

Info

Publication number: CN201041196Y
Application number: CNU2007200689185U
Authority: CN
Inventors: 周高峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-12
Filing date: 2007-04-12
Publication date: 2008-03-26
Anticipated expiration: 2017-04-12

Abstract

The utility model discloses an electric insulation rolling bearing which comprises a metal outer ring (1), a rolling body (2) and an inner ring (3), wherein, a ceramic insulating layer (4) is arranged on the outer surface of the outer ring (1). Through the spraying of the ceramic insulating layer on the outer surface of the metal outer ring, the utility model realizes the electric insulation to the outer ring, to effectively avoid the electrical erosion phenomenon, to greatly lengthen the service life of the rolling bearing under the electrical erosion state, the using cost of the rolling bearing in the enterprise is reduced, and the utility model is advantageous for the enhancement of the production benefit of an enterprise.

Description

The electrical insulation rolling bearing

Technical field

The utility model relates to a kind of bearing, especially a kind of electrical insulation rolling bearing.

Background technique

The rolling bearing that we use mostly is metal material greatly, for being applied in heavy current, rolling bearing in the particular surroundingss such as the high voltage rolling bearing of rail truck main motor (as be used for), when electric current flow through rolling bearing in, when outer ring and rolling element, can be between the rolling surface of rolling element and outer ring, or between the rolling surface of rolling element and inner ring, spark, produce the electro erosion phenomenon, this electro erosion is easy to burn out the outer ring of rolling bearing or the rolling surface of inner ring, cause whole rolling bearing to damage, shortened the working life of rolling bearing, not only increase the cost of production of enterprise, also reduced the manufacturing efficiency of enterprise simultaneously.At present, generally only be 2～5 months the working life of rolling bearing under the electro erosion state.

Summary of the invention

The purpose of this utility model is: provide a kind of heavy current of can effectively avoiding that rolling bearing is caused the electrical insulation rolling bearing of electro erosion, thereby improve the working life of rolling bearing in the heavy current environment, overcome the deficiencies in the prior art.

The utility model is to constitute like this: it comprises metallic outer ring (1), rolling element (2) and inner ring (3), and the outer surface of (1) has ceramic insulating layer (4) in the outer ring.

In above-mentioned, the thickness of ceramic insulating layer (4) is 0.25～0.35mm.

Rolling element in aforementioned (2) is spherical rolling element, or cylinder rolling element, circular cone rolling element and spherial rolling body.

Ceramic insulating layer in aforementioned (4) is the aluminium oxide sprayfused coating.

Compared with prior art, the utility model is the ceramic insulating layer of 0.25～0.35mm by the outer surface coating thickness in existing metal material outer ring, realized electrical insulation to the outer ring, blocked heavy current by outer ring flow through rolling element and inner ring, effectively avoid the electro erosion phenomenon, prolonged the working life of rolling bearing under the electro erosion state greatly.Electrical insulation rolling bearing of the present utility model can reach 12～30 months the working life under the electro erosion state, not only greatly reduces the cost that enterprise uses rolling bearing, also helps improving the manufacturing efficiency of enterprise.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is the structural representation of the rolling bearing of cylinder rolling element;

Accompanying drawing 3 is the structural representation of the rolling bearing of circular cone rolling element;

Accompanying drawing 4 is the structural representation of the rolling bearing of spherial rolling body.

Embodiment

Embodiment of the present utility model: as shown in Figure 1, it comprises outer ring 1, inner ring 3 and spherical rolling element 2.Outer ring 1, rolling element 2, inner ring 3 all adopt stainless steel or other metal materials to be made.Rolling element 2 also can be made cylinder rolling element (as shown in Figure 2), circular cone rolling element (as shown in Figure 3) or spherial rolling body (as shown in Figure 4).To spray a layer thickness be that the ceramic insulating layer 4 of 0.25～0.35mm gets final product to 1 outer surface in the outer ring.Ceramic insulating layer 4 adopts the aluminium oxide spraying to form.

Claims

1. electrical insulation rolling bearing, it comprises metallic outer ring (1), rolling element (2) and inner ring (3), it is characterized in that: the outer surface of (1) has ceramic insulating layer (4) in the outer ring.

2. electrical insulation rolling bearing according to claim 1 is characterized in that: the thickness of ceramic insulating layer (4) is 0.25～0.35mm.

3. electrical insulation rolling bearing according to claim 1 is characterized in that: rolling element (2) is spherical rolling element, cylinder rolling element, circular cone rolling element or spherial rolling body.

4. electrical insulation rolling bearing according to claim 1 and 2 is characterized in that: ceramic insulating layer (4) is the aluminium oxide sprayfused coating.