Bearing bush should have a certain strength and stiffness, reliable positioning in the bearing, easy to input lubricant, easy heat dissipation, and convenient assembly and disassembly, adjustment.

 

One, bearing type

 

The type of bearing bush can be classified by construction, size, material and processing. The following are shared according to specific understanding:

 

1. Bearing bush is classified according to structure

 

Bearing bush according to the structure can be divided into integral bearing bush and open bearing bush.

 

1) Integral bearing bush

 

This type of bearing bush needs to be installed and removed from the shaft end and has poor repairability.

 

2) Split bearing bush

 

The split bearing bush can be installed and removed directly from the middle of the shaft and can be repaired.

 

2. Bearing bush is classified according to size

 

Bearing bush according to the size can be divided into thin wall bearing and thick wall bearing.

 

1) Thin-walled bearing bush

 

This kind of thin-wall bearing bush saves material, but the rigidity is insufficient, so the machining precision of the bearing seat hole is required to be high.

 

2) Thick wall bearing bush

 

The thick wall bearing has sufficient strength and stiffness to reduce the machining accuracy requirements of the bearing seat hole.

 

3. Bearing bush is classified by material

 

Bearing bush according to the material can be divided into single material bearing bush and multi material bearing bush.

 

1) Single material bearing bush

 

This single material bearing bushing strength enough material can be directly made into bearing bushing, such as brass, gray cast iron.

 

2) Multi-material bearing bush

 

This kind of multi-material bearing bush lining is not strong enough, so multi-material bearing bush is used.

 

4, bearing bush according to processing classification

 

Bearing bush according to the processing mode can be divided into casting bearing and rolling bearing.

 

1) Casting bearing bush

 

This kind of casting bearing bush casting technology is good, single piece, mass production can be used for thick wall bearing bush.

 

2) Rolling bearing bush

 

This kind of rolling bearing is only suitable for thin wall bearing, with high productivity.

 

Two, the bearing bush positioning method

 

1. Purpose of bearing bush positioning

 

Prevent axial and circumferential relative movement between the bearing bush and the bearing seat.

 

2. Axial positioning

 

Axial positioning can be divided into two cases, one is flange positioning (making a section or two ends of the bearing bush flange), the other is lug (positioning lip) positioning.

 

3. Circumferential positioning

 

Circumferential positioning includes the fixation of setting screws and pins.

 

Three, bearing bush oil hole and oil groove

 

1, function: the lubricating oil into the journal and the movement of the surface of the pair.

 

2, the opening principle

 

1) Try to open in the non-bearing area, and try not to reduce or reduce the bearing capacity of the oil film in the bearing area.

 

2) The axial oil groove cannot be opened to the bearing end, and appropriate oil cover should be left.

 

3. Form:

 

1) According to the direction of the oil groove -- along the axial direction, circumferential direction, oblique direction, spiral line, etc.

 

2) The dividing plane in the bearing is usually arranged perpendicular to or nearly perpendicular to the load.

 

3) Large liquid sliding bearings are often designed to supply oil on both sides, which is conducive to the formation of dynamic oil film and plays a cooling role.