Research on bearing lubrication method of triplex gear oil pumps
Release time:
2020-12-10
In general, the bearing lubrication method is selected correctly or not to determine the conditions of use and life of the triplex gear oil pump bearing, so this is also quite an important part of the gear pump design. Currently three gear oil pump lubrication methods are as follows: the use of high-pressure oil leakage lubrication;
In general, the bearing lubrication method is selected correctly or not to determine the conditions of use and life of the triplex gear oil pump bearing, so this is also quite an important part of the gear pump design. Currently three gear oil pump lubrication methods are as follows: the use of high-pressure oil leakage lubrication; to the bearing continuous or pulse oil supply of high-pressure lubrication; the use of trapped oil volume reduction to the bearing pulse oil supply of high-pressure lubrication; high-pressure oil is directly introduced into the bearing holes in the bearing at the realization of high-pressure lubrication; the use of the trapped oil volume to expand the formation of a vacuum sucking low-pressure self-priming lubrication; spiral oil or suction oil lubrication and low-pressure lubrication and the use of auxiliary pump oil supply. Low-pressure lubrication by using auxiliary pump.
The former type of lubrication is generally used in rolling bearings and other requirements for low oil cleanliness and working oil temperature is not sensitive to the lubrication method, the 2-4 type of lubrication is the use of high-pressure oil lubrication, the loss of part of the high-pressure oil, reducing the volumetric efficiency of the gear oil pump, after the end of the two lubrication methods, one of which reduces the bearing bearing surface bearing capacity, and the other is due to the complexity of the structure, the cost of the high and has not been adopted. The use of trapped oil volume expansion when the formation of the vacuum suction low pressure lubrication due to the structure is simple, low manufacturing costs and high overall performance, widely used in triplex gear oil pump rolling and sliding bearing lubrication.
Vacuum suction low-pressure self-priming lubrication formed when the trapped oil volume is enlarged is utilized, and there is a larger oil channel connected to the low-pressure area on the outside of the bearing, so that the pressure on the outside of the bearing is the same as that in the low-pressure area. Due to the use of DU bearings, it is necessary to design the lubricant groove axially in the non-load-bearing surface of the bearing bore, and form the lubricant groove in the inner chamfer of the bore of the side plate, so as to achieve the purpose of making the lubricant pass through smoothly and stabilizing the pressure of the oil storage.
The low-pressure area on the inner side of the side plate is designed with a rectangular elongated groove, which is connected with the lubricating oil groove of the two bearing holes. In the gear rotation, due to the expansion of the trapped oil volume first in the rectangular groove at the formation of a vacuum, so that at both ends of the bearing has produced an instantaneous pressure difference, so that the low-pressure area has a small part of the oil along the designed oil path into the bearing hole axial oil groove, at this time the oil can be a good lubrication and cooling of the bearings, and then the oil in turn, through the collection of oil grooves and rectangular grooves, and finally filled with the expansion of the intertooth volume, which can form a complete lubrication system. A complete lubrication system.
Triplex gear oil pumps using this lubrication has more advantages: because the low-pressure area of the oil temperature is relatively low, the more conducive to the formation of the sliding bearing pressure oil film, and low-temperature oil can be taken away from most of the bearing heat, play an excellent bearing lubrication and cooling effect. It can be seen that this lubrication method compared with other lubrication methods, not only the structure is simple, small loss, and increase the volumetric efficiency of the three gear oil pump.
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