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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Axial positioning of bearings Axial positioning of the bearing
In order to avoid the axial movement of the bearing when receiving the axial load; the bearing should be used in the shaft and the hole in the housing. The positioning of the bearing on the shaft and the hole in the housing; depending on the load on the shaft The size and direction of the bearing; the speed of the bearing; the type of bearing; the orientation of the bearing on the shaft. The greater the axial load; the higher the bearing speed; the more secure the axial positioning. About the different types of bearings; The method should also be different. For example, the diagonal touch ball bearing and the tapered roller bearing can be used to support the shoulder of the shoulder and the outer hole of the housing hole; instead of using special positioning equipment; the axial movement of the ring can be supported by the bearing itself. a radial bearing as a fixed support; the inner and outer rings are fixed to the left support in the axial direction. In the swimming support that is required to compensate for the thermal elongation of the shaft; if the equipment does not have a separate bearing; only one set is required to be fixed therebetween. Circle; the swimming ferrule is not fixed. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
In the swimming support, the equipment is not separate bearing; such as short cylindrical roller bearing, needle bearing; then both ferrules need to be fixed.
The commonly used bearing ferrule bearing orientation method is analyzed as follows:
1. The inner ring of the bearing is positioned on the inner ring of the bearing on the shaft; usually the bearing is fixed on one side by the shoulder; the other side is fixed by a nut, a retaining washer or a retaining ring. The shoulder and the axial fixed The dimensions of the parts and the inner ring of the bearing are somewhat different; they can be determined according to the equipment scale of the various types of bearings listed in the bearing scale table.
.1) The nut is positioned at a high bearing speed and accepts a large axial load; the end face of the nut and the inner ring of the bearing should be straight with the center line of rotation of the shaft. Otherwise, even tightening the nut will damage the bearing orientation of the bearing and The normal working condition of the bearing; the rotation precision and the service life of the descending bearing. Especially when the bearing inner hole and the shaft are loosely matched; more strict control is required.
In order to avoid the looseness of the nut during the rotation process; the need to adopt appropriate technical measures to avoid loosening. Use the nut and the retaining washer to position; insert the inner teeth of the retaining washer into the keyway of the shaft; One of the bends into the incision of the nut.
.2) The retaining ring retaining ring receives the axial load is not large, the rotating speed is not high, the shaft is short and the threading on the journal is difficult; the elastic retaining ring with a rectangular cross section can be selected. The method of loading and unloading is very convenient; the position is occupied.
.3) The thrust washer is positioned when the journal is short and the shaft is machined into a thread; if the bearing speed is high and the axial load is large; the washer can be used for positioning; that is, the washer is used on the shaft end face. More than one screw for positioning; use a retaining washer or wire to screw it; avoid loosening.
.4) Spherical roller bearings with fixed sleeve positioning bearing speed; receiving smooth radial load and small axial load; can be used on the optical axis by means of conical adapter sleeve. Move the washer to position it. Use the nut to tighten the friction of the sleeve to position the bearing.
.5) The bearing with taper in the inner hole is positioned on the taper shaft with the tapered bearing; the axial load is checked against the shaft and the bearing; therefore, the directionality of the taper of the inner hole should be paid attention to when the equipment is located. End and at the shaft end promise to be machined into a thread; can be directly positioned with a nut.
If the bearing is not at the shaft end of the device; and the shaft is not allowed to be machined into a thread. In this case; the threaded ring that is merged with the two halves can be inserted into the groove of the shaft; then the nut is used to position the bearing.
.6) Special positioning in certain special cases; the shoulder and fillet dimensions of the shaft cannot be cut off according to the equipment dimensions listed in this catalogue; transition gaskets can be used as axial supports.
2. When the outer ring of the bearing outer ring is in the equipment of the outer casing hole; the inner side of the outer casing hole usually has the orientation of the shoulder fixed bearing; the other side is positioned with the end cover, the thread ring and the hole with the elastic retaining ring. .
.1) End cap positioning end cap positioning is used for all types of radial bearings and angular touch bearings; in the case of high bearing speed and large axial load. End caps are used to position the outer ring of the compression bearing; The cover can also be made into a labyrinth seal.
.2) Thread ring positioning bearing has higher speed; axial load is larger; it is not suitable for positioning with end cover; threaded ring can be used to position radial bearing and thrust bearing; at this moment can be used to adjust axial clearance of bearing.
.3) Elastic retaining ring positioning The axial position occupied by this positioning method. The 鹦 鹦 鹦 悖 悖 圃旒虻ィ 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 〉 在 在 在 在 在 轴承 轴承Add an adjustment ring; easy to adjust the axial orientation.
.4) Deep groove ball bearings with retaining grooves on the outer ring of the bearing; can be positioned by the stop ring.
This type is used when the retaining shoulder cannot be machined due to conditional constraints in the housing bore; or when it is necessary to reduce the generalized dimensions.
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Axial positioning of the bearing
Source: China Bearing Network Time: 2014-03-14