CN202149141U - Magnetic rolling bearing - Google Patents

Abstract

The utility model discloses a magnetic rolling bearing, which is composed of an outer ring, an inner ring, a cage and a rolling body installed in the cage; the inner ring is a magnetic inner ring; the rolling body is a magnetic rolling body ; The space surrounded by the outer ring, the magnetic rolling element and the magnetic inner ring is filled with magnetic fluid or grease containing magnetic particles. The magnetic inner ring is a magnetic inner ring or a monolithic magnetic inner ring formed by connecting end-to-end magnetic poles of different names of a plurality of arc-shaped magnets. The magnetic rolling elements are rolling elements of ferromagnetic material. When the utility model is in operation, the magnetic inner ring and the rolling body in rotary motion bring the magnetic fluid into the contact area to increase the lubricating effect. Due to the magnetic force between the rolling elements and the magnetic inner ring, the friction torque of the rolling bearing increases slightly, but it is more stable and the range of change is reduced, so the stability of the friction torque of the bearing is good.

Description

A magnetic rolling bearing

technical field

The utility model relates to a rolling bearing, in particular to a magnetic rolling bearing.

Background technique

Rolling bearings are well known in the prior art and are an important mechanical basic part widely used in various fields of national economy and national defense. During the use of existing bearing designs, there are generally two types of failure phenomena of rolling bearings. One is that the bearings fail due to fatigue due to poor lubrication, and the other is that there is noise during the operation of the bearings. Excessive bearing temperature and bearing noise will affect the bearing life, and the reasons for these failures are not only insufficient design and assembly, but also largely due to insufficient lubrication of the bearing and insufficient adaptability of the bearing to load changes during the working process of the bearing. It is mainly manifested in the change of bearing friction torque. The fluctuation of the friction torque of the rolling bearing determines the motion accuracy of the rolling bearing support, affects the accurate control of the position of the moving parts, and is an important performance parameter of the bearing. In view of this situation, the existing bearings are improved by using Lenz's law of magnet action, in order to obtain a bearing with remarkable lubricating effect and good adaptability to load changes.

Contents of the invention

The purpose of this utility model is to provide a magnetic rolling bearing, which solves the problems of insufficient lubrication and large variation of bearing friction torque existing in existing bearings, in order to obtain a bearing with remarkable lubricating effect and good stability of friction torque.

The technical scheme that the utility model adopts is:

The utility model is composed of an outer ring, an inner ring, a cage and a rolling body installed in the cage; it is characterized in that: the inner ring is a magnetic inner ring; the rolling body is a magnetic rolling body ; The space surrounded by the outer ring, the magnetic rolling element and the magnetic inner ring is filled with magnetic fluid or grease containing magnetic particles.

The magnetic inner ring is a magnetic inner ring or a monolithic magnetic inner ring formed by connecting end-to-end magnetic poles of different names of a plurality of arc-shaped magnets.

The magnetic rolling elements are rolling elements of ferromagnetic material.

The beneficial effect that the utility model has is:

1. The magnetic inner ring or magnetic rolling body that rotates with the shaft brings the magnetic fluid into the contact area to increase the lubrication effect.

2. Due to the magnetic force between the magnetic rolling element and the magnetic inner ring, the friction torque of the magnetic rolling bearing increases slightly, but it is more stable and the range of change is reduced, so the stability of the bearing friction torque is good.

3. There is a magnetic force between the magnetic roller and the inner ring and outer ring of the steel bearing, and the friction torque of the bearing is more stable.

Description of drawings

Figure 1 is a schematic diagram of the magnetic bearing structure.

Fig. 2 is a partial enlarged view of the magnetic bearing structure.

In the figure: 1. Magnetic inner ring, 2. Magnetic rolling element, 3. Outer ring, 4. Arc magnet, 5. Magnetic fluid or lubricating grease containing magnetic particles.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 1 and Fig. 2, the utility model is composed of an outer ring, an inner ring, a cage and a rolling body installed in the cage; the inner ring is a magnetic inner ring 1; the rolling body It is a magnetic rolling body 2; the space surrounded by the outer ring 3, the magnetic rolling body 2 and the magnetic inner ring 1 is filled with magnetic fluid or lubricating grease 5 containing magnetic particles.

The magnetic inner ring is a magnetic inner ring surrounded by a plurality of arc magnets 4 with different magnetic poles connected end to end or an integral magnetic inner ring.

The magnetic rolling element 2 is a rolling element of ferromagnetic material.

The utility model takes the deep groove ball bearing 6208 as an example, the outer ring D is 80mm, and the inner ring d is 40mm. Improvements are made on the basis of this bearing. The inner ring of the deep groove ball bearing is magnetic, and it is composed of an integral magnetic inner ring or spliced by seven arc-shaped magnets 4 . The seven arc-shaped magnets 4 are respectively connected end to end, and the magnetic fields at the joints are opposite, thereby enclosing the annular magnetic inner ring 1 of the bearing. The magnetic rolling body 2 is a rolling ball made of ferromagnetic material. The space enclosed by the magnetic inner ring 1 , the magnetic rolling element 2 and the outer ring 3 is filled with magnetic fluid or lubricating grease 5 containing magnetic particles. When the magnetic rolling bearing is working, rotating the magnetic inner ring 1 at an angular velocity ω _i or the magnetic rolling element 2 rotating at a speed ω _b will bring the magnetic fluid or the grease 5 containing magnetic particles into the contact area, the magnetic inner ring 1 and the magnetic The magnetic field generated by the rolling body 2 will have a magnetic effect on the magnetic fluid or the grease 5 containing magnetic particles, so that the lubricant is distributed more evenly and the lubrication effect is increased; at the same time, due to the magnetic force between the magnetic rolling body 2 and the magnetic inner ring 1 , according to Lenz's law, the friction torque of the rolling bearing increases slightly, but it is more stable, and the range of change decreases, so the friction torque of the bearing is stable, and there is a magnetic force between the roller and the inner ring and outer ring of the steel bearing effect, the friction torque of the bearing is more stable.

The above-mentioned specific embodiments are used to explain the utility model, rather than to limit the utility model. Within the spirit of the utility model and the scope of protection of the claims, any modifications and changes made to the utility model fall into the scope of the utility model. scope of protection.

Claims (3)

1. magnetic rolling bearing is made up of outer ring, inner ring, retainer and the rolling element that is installed in the retainer; It is characterized in that: described inner ring is a kind of magnetic inner ring; Described rolling element is a kind of magnetic rolling element; Be filled with magnetic fluid in the space that outer ring, magnetic rolling element and magnetic inner ring surround.

2. according to a kind of magnetic rolling bearing described in the claim 1, it is characterized in that: described magnetic inner ring is magnetic inner ring or the all-in-one-piece magnetic inner ring that the synonyms pole end-to-end by many arc-shaped magnets surrounds.

3. according to a kind of magnetic rolling bearing described in the claim 1, it is characterized in that: described magnetic rolling element is the rolling element of ferromagnetic substance.

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