Working principle and characteristics of gear oil pump
2020/08/02 16:23:42
Gear oil pump relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport liquid or pressurize it. The structure of the externally meshing double gear pumps. A pair of meshing gears and pump cylinders separate the suction chamber from the discharge chamber. When the gear rotates, the volume between the teeth where the teeth on the suction cavity side disengage from each other gradually increases, the pressure decreases, and the liquid enters the teeth under the action of the pressure difference. As the gear rotates, the liquid between the teeth is brought to the discharge chamber. At this time, the volume between the teeth of the gear teeth on the discharge cavity side gradually decreases, and the liquid is discharged. Gear oil pumps are suitable for transporting lubricating liquids that do not contain solid particles, are non-corrosive, and have a large viscosity range. The flow of the pump can reach 300m3/h, and the pressure can reach 3×107 Pa. It is usually used as a hydraulic pump and conveying various oil products. The gear oil pump has simple and compact structure, easy manufacture, convenient maintenance, self-priming capability, but large flow and pressure pulsation and high noise. The gear oil pump must be equipped with a safety valve to prevent damage to the pump or prime mover due to some reasons such as blockage of the discharge pipe causing the pump outlet pressure to exceed the allowable value. (1) Working principle The magnetic drive pump is a type of positive displacement pump. It consists of two gears, a pump body, and front and rear covers forming two enclosed spaces. When the gears rotate, the volume of the space on the side where the gears are disengaged becomes larger, forming a vacuum, and sucking in liquid. The volume of the space on the gear meshing side changes from large to small, and liquid is squeezed into the pipeline. The suction cavity and the discharge cavity are separated by the meshing line of the two gears. The pressure at the outlet of the gear pump depends entirely on the resistance of the pump. (Two) operation and maintenance (1) Check the tightness of all pipeline flanges and joints before starting. (2) Rotating coupling, no friction and collision sound. (3) The pump should be filled with delivery liquid when it is started for the first time. (4) Fully open the valves in the suction and discharge pipelines before starting, and it is strictly forbidden to start with closed valves. (5) After verifying the rotation direction of the motor, start the motor Structural features:
This series of gear pumps are mainly composed of gears, shafts, pump bodies, pump covers, bearing sleeves, and shaft end seals. The gear has higher hardness and wear resistance after nitriding treatment. It is installed together with the shaft and runs in a replaceable sleeve. The lubrication of all parts in the pump is automatically achieved by using the conveying medium when the pump is working.
This series of pumps has a simple and compact structure, and is easy to use and maintain. The stainless steel gear pump can transport edible oil, beverages, etc.
