How to design the size of axial positioning sleeve forging

In order to prevent axial movement of bearing sleeve forgings under axial load, axial positioning devices are applied to bearings on the shaft and in the outer Nanning hole.

But how should axial positioning sleeve forging size be designed? The following mainly to tell you.

The positioning method of the commonly used bearing sleeve forgings is described as follows:

When the bearing inner ring is installed on the shaft, the bearing position is generally fixed by the shaft shoulder on one side, and the other side is fixed with nuts, stop washers or spring retainers. The dimensions of the contact part between the shaft shoulder and the axial fixed parts and the bearing inner ring can be determined according to the installation dimensions of various types of bearings listed in the bearing size table.

(1) The nut is positioned in the case of high speed of bearing sleeve forging and large axial load, and the end face of the nut and the inner ring of the bearing should be perpendicular to the rotation center line of the shaft. Otherwise, even if the nut is tightened, the installation position of bearing sleeve forgings and the normal working state of bearings will be destroyed, and the rotation accuracy and service life of bearings will be reduced. In particular, when the inner hole of bearing sleeve forgings and the shaft fit loosely, it is more necessary to strictly control. In order to prevent the nut from loosening during rotation, appropriate technical measures should be taken to prevent loosening. Using the nut and stop washer for positioning, insert the inner key teeth of the stop washer into the keyway of the shaft and bend one of the teeth on the outer ring into the cut of the nut.

(2) Spring ring positioning in bearing bearing axial load is not large, speed is not high, the shaft is short and it is difficult to process threads on the journal, the elastic ring positioning with rectangular section can be used. This method is convenient to load and unload, occupies a small position, and is simple to manufacture.

(3) thrust washer positioning in the journal is short, the journal processing into threads is difficult, bearing speed is higher, axial load is larger, can use the washer positioning, that is, the washer on the shaft end face with two or more screws for positioning, with a stop washer or wire screw to prevent loosening.

(4) The speed of the sleeve forgings of the fixed sleeve bearing is not high, and the self-aligning roller bearings bearing the stable radial load and small axial load can be installed on the optical shaft with the help of the tapered fixed sleeve. Set with nut and stop washer for positioning. Use the friction force of the nut lock to tighten the sleeve to position the bearing.

(5) the orientation of the bearing with taper in the inner hole the bearing with taper in the inner hole is installed on the taper axis. It is necessary to make the axial load check the jacking shaft and bearing. Therefore, attention should be paid to the orientation of the taper of the inner hole during installation. If the bearing is located at the shaft end and is allowed to be threaded at the shaft end, it can be directly positioned with a nut. If the bearing is not mounted on the shaft end, and the shaft is not allowed to be threaded. In this case, two combined threaded rings can be clamped into the groove of the shaft, and the bearing sleeve forgings can be positioned with nuts.

(6) Special positioning In some special cases, when the size of the shoulder and round corner of the shaft cannot be determined according to the installation size listed in this catalog, the transition gasket can be used as the axial support.

this is open die forgings produced by tongxin precision forging company