Appropriate installation clearance helps taper roller bearings work properly. If the clearance is too large, the equipment will vibrate greatly and the rolling bearing will be noisy; if the clearance is too small, the temperature of the taper roller bearings will rise, which will not work properly, so the rolling elements will be stuck. So what clearance does the bearing have? Or do taper roller bearings only have a radial play? Let's introduce the clearance classification of taper roller bearings by ball bearings suppliers, right?
1. Clearance of taper roller bearings
The clearance of taper roller bearings, also known as bearing clearance, refers to that when the taper roller bearings are not installed on the shaft or bearing housing, one side of the inner ring or outer ring is fixed, and then the side where the bearing clearance is not fixed is made radial Or the amount of movement when moving axially. According to the moving direction, it can be divided into radial clearance and axial clearance. The size of the clearance during operation (called working clearance) has an impact on the rolling fatigue life, temperature rise, noise, vibration, and other properties of the bearing.
2. Clearance classification of taper roller bearings
1. Radial clearance
Radial clearance refers to a tapered roller bearing that can withstand radial loads in a non-preloaded state. In a radially eccentric, limit position, the arithmetic mean of the radial distance moved to the opposite limit position.
2. Axial clearance
Axial clearance refers to a tapered roller bearing that can withstand axial loads in two directions in a non-preloaded state. Its axial internal clearance is: when there is no external load, one ferrule relative to the other, the average value of the axial distance from one axial limit position to the opposite limit position.
3. Clearance classification of taper roller bearings in different states
The clearance of taper roller bearings will change correspondingly in different states. Specifically, it can be divided into original clearance and effective clearance:
1. Original clearance
The original clearance of the taper roller bearings refers to the clearance of the taper roller bearings in a free state before being installed on the machine. It is difficult to know the original clearance without measuring. Therefore, the original clearance is often replaced by the inspection clearance. The inspection clearance is the clearance data obtained by the instrument under the condition of applying the measurement load under the inspection state. Strictly speaking, it is not the same as the original clearance of the taper roller bearings, but in general, the two are in the reading. The difference is not big, so they can be substituted for each other without much error.
2. Installation clearance
The installation clearance is also called the fitting clearance, which is the clearance when the taper roller bearings and the shaft, and the bearing seat are installed but not working. Due to the interference installation, either the inner ring is enlarged, the outer ring is reduced, or both, the installation clearance is smaller than the original clearance.
3. Effective clearance
Effective clearance, also known as working clearance, refers to the large temperature rise and thermal expansion of the inner ring during operation, which reduces the clearance of taper roller bearings; at the same time, due to the action of the load, elastic deformation occurs at the contact between the rolling element and the raceway, so that the bearing clearance increases. Whether the bearing working clearance is larger or smaller than the installation clearance depends on the combined effect of these two factors.
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