Briefly describe the structure, model and application of tandem thrust cylindrical roller bearings

Tandem thrust cylindrical roller NSK bearings are a kind of bearings, which are widely used in the rubber industry and mechanical equipment. Today, the editor will introduce to you the knowledge of the structure and model of tandem thrust cylindrical roller bearings, hoping to help everyone in the understanding of tandem thrust cylindrical roller bearings.

1. Structure type

1. Basic tandem thrust cylindrical roller bearings

The basic type tandem thrust cylindrical roller bearing connects the shaft washer, seat washer and roller with the cage assembly through elastic spacers. This type of bearing has a separable structure with detachable parts. It is recommended to install and disassemble carefully in accordance with the numbering sequence provided in the following table when using it.

2. Tandem thrust cylindrical roller bearing with sleeve

Sleeve-type tandem cylindrical roller bearings are bearings with sleeves on the outside of the basic tandem cylindrical roller bearings, which can be assembled and disassembled as a whole during use.

3. Tandem thrust cylindrical roller bearing with shaft

The shaft-type tandem cylindrical roller bearing is a kind of modified structure bearing. A shaft is inserted into the inner hole of the basic tandem cylindrical roller bearing, and the bearing is fixed on the shaft with an elastic lock ring. This type of bearing parts are inseparable, and the overall assembly and disassembly are very convenient.

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Tandem thrust cylindrical roller bearings

2. Structural features

Tandem thrust cylindrical roller bearings have a limited radial section, a relatively large axial load carrying capacity, a long working life and the smallest possible friction loss.

3. Model

Ordinary tandem cylindrical roller bearings (d=4～420), with shaft type tandem cylindrical roller bearings

(D=4～34), sleeve type tandem thrust cylindrical roller bearing.

Four, use requirements

When using tandem bearings, the following requirements should be observed:

1. Preload: add 1% of the basic rated dynamic load of the bearing, and the basic rated dynamic load of each tandem bearing

Load, see the following table.

2. Radial guide: Full complement cylindrical roller bearings or needle roller bearings can be used.

3. Elimination of tilt: In the machining of supporting parts, any tilt must be eliminated, that is, the tilt of the supporting surface.

4. Tolerance of fit: In order to ensure correct operation, the recommended tolerance of fit: shaft f6, seat hole F7.

5. Bearing lubrication: Tandem bearings must always be lubricated with dilute lubricating oil.

6. Bearing installation: Do not hit the bearing parts with hammers or other heavy objects during bearing installation and disassembly.

Five, application

Application example of tandem bearings: Because tandem thrust cylindrical roller bearings have limited radial cross-section, relatively large axial load capacity, long-term working life and relatively small friction loss, parallel twin screws in the rubber and plastic industry The extruder gear transmission box has been extremely successfully applied, and it will also be popularized and applied in other mechanical equipment.