Gear pump oil-locked phenomenon
Gear pumps are widely used in various fields due to their simple structure and low cost. Gear pumps rely on the meshing between the two pumps that rotate in the opposite direction to realize fluid transport. The pressure generated by the oil-locked phenomenon caused by the improper adjustment of the gear pump gap will be difficult for the pump to work, so it must understand the cause of the oil-locked phenomenon and how to adjust the pump gap.
The oil-locked phenomenon of gear pumps is related to the gap between the ring gear and the pinion. After any gear pump is installed, it needs to be adjusted, and the gap between the two gears needs to be adjusted correctly. If the gap is too large, the gear pump will work because there is too little pressure between the two gears and the fluid cannot form a locking effect, which will cause the pump to lose suction and cannot work normally.
On the other hand, if the gap is too small and the pressure between the two gears is too strong, the fluid will be too strongly locked and the fluid will not flow. In addition, the pump gap is too small, there is an overload force on the gear, which will cause tooth failure, involving a greater loss of the gear pump. Therefore, it should be noted that the phenomenon of oil-locked caused by the gap between the gear and the pinion is too large or too small, so the gap setting is very important for the normal work of the gear pump.
The gap adjustment of gear pump includes two methods, one is hydraulic method and the other is manual method. The hydraulic gap adjustment method utilizes the pressure driving by hydraulic electricity. Firstly, the high-pressure oil is supplied to the hydraulic actuator and then the plunger drives the eccentric shaft to rotate, which drive the eccentric sleeve to rotate. When the eccentric sleeve rotates, its surface will be slightly extended and contract, thereby driving the pinion to rotate, and then adjust the gap between the pinion and the ring gear.
The manual adjustment method is to directly adjust the pinion gap and ring gear gap by hand. This adjustment method has better adjustment accuracy by adding a suitable adjustment nut and nut on the pump cover. Manual adjustment of the gap between the ring gear and the pinion is usually used in the case of small gap adjustment.
In summary, the oil-locked phenomenon of gear pumps is caused by the improper adjustment of the gap between the ring gear and the pinion. Therefore, when adjusting the pinion gap, both the hydraulic method and the manual method are needed to adjust the gap correctly.
