Excavator bearing device and disassembly method

Source: China Bearing Network Time: 2013-09-24

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';

Excavator bearing device and disassembly method; should be based on the layout of the excavator bearing, the size of the scale and the cooperation with the bearing components of the excavator. The pressure of the device and disassembly should be directly added to the tightly engaged excavator bearing ring. On the end face; the pressure cannot be transmitted through the excavator bearing tumbling body; as this will form an indentation on the outer surface of the excavator bearing work; affect the normal operation of the excavator bearing; and even damage the excavator bearing. The excavator bearing retainer and seal ring Parts such as dust caps are easily deformed; the pressure of the device or the bearing of the excavator cannot be added to these parts.
.1) The inner ring of the excavator bearing is tightly engaged with the shaft; the outer ring of the excavator bearing is loosely cooperating with the casing; the excavator bearing can be press-fitted on the bearing first by the press; then the shaft is loaded together with the excavator bearing Into the casing; a device sleeve (copper or soft steel pipe) of soft metal material is placed on the end face of the excavator when pressing. The inner diameter of the casing of the device should be slightly larger than the diameter of the journal; the outer diameter should be smaller than the excavator The diameter of the rib of the inner diameter of the bearing; avoid pressing on the holder. When a large number of excavator bearings are used, a handle can be added to the sleeve.
The excavator bearing device should make the excavator bearing hole and the center line of the shaft coincide. The excavator bearing is not only difficult to be tilted relative to the shaft; and it will form indentation, journal bending and even cracking of the inner ring of the excavator bearing.
In the local area where the press is short or not available; the casing and the hammer device can be used to excavate the bearing. The hammering force should be evenly transmitted to the entire circumference of the end face of the excavator bearing ring; thus the device casing is hammered. The end face should be made into a sphere.
.2) The outer ring of the excavator bearing is tightly cooperated with the housing hole; the inner ring and the shaft are loosely coupled; the excavator bearing can be pressed into the housing first; then the outer diameter of the device sleeve should be slightly smaller than the housing The diameter of the hole.
.3) the inner ring and the shaft of the excavator bearing; the outer ring and the housing hole are tightly cooperated; the end face of the device sleeve should be made into a ring that can press the end face of the outer ring of the excavator bearing together; or use a disc and The device casing; the pressure is transmitted to the inner and outer rings together; the excavator bearing is pressed into the shaft and the casing. This device method is uniquely applicable to the device capable of actively aligning the centripetal spherical bearing.
.4) heating device; the force required for the excavator bearing is related to the size of the excavator bearing and the amount of cooperation interference; the method of hot charging for medium and large excavator bearings with large interference. Before hot loading Put the excavator bearing or the excavator bearing ring into the fuel tank or special heater and heat it evenly to 80~100Â°C (not to exceed 100Â°C).
Hot-loaded excavator bearings require skilled operation skills. When the excavator bearings are removed from the heating tank or the heater; immediately clean the oil and attachments on the bearing surface with a clean cloth (not cotton yarn); In front of the cooperation appearance; push the excavator bearing to the position of the shoulder in one operation. It should be pushed all the way during the cooling process; or use a small hammer to tap the excavator bearing through the device casing to make it tight. The device should be slightly rotated when the device is installed; to prevent the device from being skewed or stuck.
When the outer ring of the excavator bearing and the hole of the housing are tightly engaged, the housing can be heated and then loaded into the excavator bearing. The unique excavator bearing seat made of light metal is in tight cooperation; it can be pressed by the outer ring of the excavator bearing Into the damage of its cooperation appearance; at this time should heat the bearing housing

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