external gear oil pump的意思|示意

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External gear oil pumps are devices used to deliver oil to components with a rotary motion. They're commonly found in internal combustion engines, transmissions and axles of vehicles, as well as machinery used in manufacturing and other industrial fields.

External gear oil pumps are made up of two gears that are sealed together and turn in opposite directions. One gear is the drive gear, which is connected to a prime mover such as an electric motor or the engine. The other is the driven gear, which is connected to another component such as a bearing housing. As the drive gear turns, the driven gear is forced to turn in the opposite direction. This creates a pumping action which draws oil in at the suction port and pushes it out at the delivery port.

External gear oil pumps are used to maintain lubrication between moving parts, helping to reduce friction and wear. As the pump's gears rotate, they produce cavitation, which helps to break down larger oil particles. This results in a finer oil spray that can more easily penetrate into the smaller spaces between the parts for better lubrication.

The speed of the pump is usually determined by the prime mover, so the pump works with a constant delivery rate at all times. This means the oil pressure created by the pump is also constant, regardless of engine speeds.

External gear oil pumps are also very efficient, with typical operating efficiencies of up to 95%. This means that as much as 95% of the power used to run the pump is converted into fluid flow. Given their efficiency and overall reliability, external gear oil pumps are a popular choice for many applications.