Gear pump based on high oil performance of trapped oil

In order to fully alleviate the impact hazard of gear pump oil trapping from the design, the new trapped oil flow multiplied by the trapped oil area is minimized as the design goal, and an optimization model based on the trapped oil performance is constructed.

The results of the example show that: the conventional lightweight design of the pump will bring a lot of oil trapping power; although the conventional flow non-uniformity coefficient and radial force minimization design can improve the oil trapping performance overall, but the trapping oil is the smallest Chemical energy can further improve the performance of trapped oil; the conventional design of trapped oil flow minimizes the formation of a large crest area, which in turn weakens the performance of trapped oil, and draws trapped oil power as a better assessment. Quantitative indicators of oil hazards.

The external gear pump (referred to as the gear pump) is a power component for pumping oil and is widely used. As the gear pair of the core component of the pump, its tooth profile is directly related to the performance of the pump.

In this regard, a large number of optimization studies have been carried out at home and abroad, mainly involving low pulsation rate, light weight, small radial force, etc. However, the trapped oil phenomenon determined by the structure of the pump is a serious hazard and a sharp fluctuation of the oil pressure. It will trigger a strong impact load, causing damage such as vibration and friction pair failure.

At present, the related research mainly focuses on two aspects of pressure simulation and verification and mitigation measures: On the one hand, it mainly focuses on the innovation of unloading groove type to maximize the unloading area; on the other hand, through the optimization and adjustment of the tooth profile parameters, the oil is trapped. Minimize traffic.

In fact, the impact load caused by the trapped oil pressure is simply referred to as the trapped oil force. The hazard depends not only on the peak value of the trapped oil pressure, but also on the size of the trapped oil pressure acting area, which is exactly what is currently available. The relevant research institute ignores it, only the extreme value of the trapped oil pressure is used as a measure of the performance of the trapped oil. To this end, this study aims to minimize the trapping of oil in order to obtain the best tooth shape parameters.

Sleepy oil performance

Since the peak of the oil pressure on the side of the wheel is the largest, and the position of the unloading groove is about to close, the research is aimed at the stage of the oil-tight compression from the wheel side.

The main and driven wheels of the pump without the backlash gear pair have the same basic parameters, the wheel cores are respectively recorded as o1, o2, and only the rectangular unloading groove is opened on the oil discharge side.

in conclusion

(1) The weight of the gear pump will bring a lot of oil and oil, and it is necessary to combine the unloading tank innovation to relieve the impact of oil trapping;

(2) The flow non-uniformity coefficient and the radial force minimization design can always improve the performance of the trapped oil, and the trapped oil force is minimized to further promote the performance of the trapped oil;

(3) The minimization of trapped oil flow weakens the performance of trapped oil as a whole; the static index of minimizing oil trapping overcomes the evaluation limitations of current peak indicators.