Cómo resolver el problema del aceite atrapado en las bombas de engranajes y cómo resolver el problema de la fuerza radial desequilibrada

1. Oil trapped in gear pump

During the working process of the hydraulic gear pump, due to the rotation of the gear, there will be a period of time when the front and rear covers form a closed space. This space is called a trapped oil area. During the formation of the trapped oil area, there will be situations where the oil is trapped and cannot be discharged or the gas is trapped and cannot be released. This phenomenon is called the trapped oil phenomenon of the gear pump.

The trapped oil phenomenon has adverse effects on the work of the gear pump, mainly in the following aspects:

① Oil heating: Since the oil cannot be discharged in time, it will continue to compress and expand in the closed space, causing the oil temperature to rise, thus affecting the working efficiency and service life of the gear pump.

② Noise generation: Because gas is trapped and cannot be released in time, cavitation will occur, thereby generating noise.

③ Vibration and pressure fluctuations: Due to the trapped oil phenomenon of oil or gas, pressure fluctuations and vibrations will occur, affecting the working stability of the gear pump.

2. Methods to solve the problem of oil trapping in gear pumps

In order to solve the problem of trapped oil in gear oil pumps, the following methods are usually used:

① Open an unloading tank: In the structural design of the gear pump, an unloading tank should be opened reasonably so that during the oil trapping period, the closed space can be connected to the oil suction area or oil pressure area through the unloading tank, so that the oil or gas can be discharged in time. the goal of.

② Changing the size of the flow distribution window: By changing the size of the flow distribution window, the size of the trapped oil area can be effectively controlled, thereby controlling the degree of compression and expansion of the oil or gas.

③ Using a floating bushing: By using a floating bushing, the bushing can float with pressure fluctuations during operation of the gear pump, thereby reducing the generation of radial unbalanced forces.

3. Solution to radial unbalanced force

Radial unbalanced force is an important problem during the operation of gear hydraulic pumps, which can lead to bearing wear and pump body vibration. In order to solve the problem of radial unbalanced force, the following methods are usually used:

① Optimize gear design: By optimizing the design of the gear, the offset of the center of gravity of the gear can be reduced, thereby reducing the generation of radial unbalanced force. For example, design methods such as tooth shape modification and tooth side modification can be used.

② Adding a balancing mechanism: In the mechanism design of the variable gear pump, a balancing mechanism can be added, such as a balancing drum or balancing ring. These mechanisms can effectively reduce the generation of radial unbalanced forces.

③ Use elastic support: By using elastic support, the bearing can float with pressure fluctuations during the operation of the gear pump, thereby reducing the generation of radial unbalanced force. For example, structures such as rubber bearings or elastic support bearings can be used.

④ Regular maintenance and replacement of bearings: During the use of high-pressure gear pumps, regular maintenance and replacement of bearings can effectively reduce the generation of radial unbalanced forces. At the same time, when installing the bearing, it should be ensured that the installation accuracy and coaxiality of the bearing meet the requirements.

To sum up, solving the problem of oil trapping and radial unbalanced force in gear pumps requires many aspects, including optimized design, improved structure, use and maintenance. By adopting appropriate solutions, the working efficiency and stability of the gear pump can be effectively improved and its service life extended.