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Improve the high pressure gear pump bearing life

Author : Xiong Date : 10/13/2012 5:37:51 PM
Improve the high pressure gear pump bearing life

1. The reasonable choice of gear parameters to reduce high pressure gear pump gear by radial force
Prior to the analysis, the role of the gear on the radial force and oil pressure, width of tooth addendum circle diameter relevant. Due to the design parameters can't decreases, and so reduce radial force can only reduce the width of tooth addendum circle diameter. If you use the increase of gear modulus, reduce the number of teeth method, can guarantee in the pump flow under a constant decrease addendum circle diameter and width of tooth. So high pressure pump of the number of teeth less, generally in 6 ~ 13; And limit the width of the tooth, general tooth width only (3 ~ 6) bian.

2. Improve the bearing working conditions
Ensure that the oil to bearing with good lubrication, to improve the bearing lubrication and cooling conditions.
At present, in medium and high pressure gear pump, the two kinds of methods to bearing lubrication, namely: the pressure oil lubrication and oil absorption lubrication.
Pressure oil lubrication is the use of pump closed die volume of trapped oil phenomenon, namely when the die is at shut volume from the big change hours, to squeeze out oil to oil injection bearing to achieve lubrication bearing purpose. Pump every turned a tooth, and a bearing lubrication.
Suck oil lubrication is the use of closed die volume of suction empty phenomenon, namely when the die is at shut volume from bigger, produce suction air, make the oil absorption cavity with the oil from the race back flow to the bearing to achieve lubrication bearing purpose. Also, the gear pump every turned a tooth to bearing lubrication a.
Due to the suction of the oil temperature than pressure export of oil temperature is low, so the oil absorption lubrication, to reduce the bearing temperature effect is good.

3. Use specific pressure and velocity value higher sliding bearing material or with belt spacer of high precision thick needle bearing.

The obove: 
High pressure gear pump main fault