Gear pump

A gear pump is a component of a machine lubrication, oil supply or other liquid system, a type of hydraulic pump. It is a rotary type. There are two or more gears engaged in the gearbox, and the fluid is sucked from one side and discharged to the other side under the action of rotation. Its vibration and noise are slightly larger than the screw pump, and it can be used as a screw pump alternative. Its role is to make oil or other fluid medium with a certain pressure and flow and flow direction.

A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to deliver or pressurize the liquid. The two gears, the pump body and the front and rear covers form two closed spaces. When the gear rotates, the volume of the space on the side of the gear disengagement increases from small to large, forming a vacuum, sucking the liquid, and the volume of the space on the gear meshing side changes from large to large. Small, and squeeze the liquid into the pipeline. The suction chamber and the discharge chamber are separated by the meshing lines of the two gears. The pressure at the discharge port of the gear pump is completely dependent on the resistance at the pump outlet.

Pump classification

In terms of the core component gears, mainly the common normal gear pump and the arc gear pump. The common normal gear pump conveys the medium containing impurities more durable than the circular gear pump, while the circular gear pump has a special structure, conveys clean medium, has low noise and long service life, and each has its own advantages.

According to the brand, there are bosch gear pump; rexroth gear pump; vickers gear pump; Kawasaki gear pump; tadem gear pump; eaton gear pump；

Operating feature

Advantages: simple and compact structure, small size, light weight, Good manufacturability, low price, strong self-suction, insensitive to oil pollution, large speed range, impact-resistant load, convenient maintenance and reliable operation.

Disadvantages: radial force imbalance, large flow artery, high noise, low efficiency, poor interchangeability of parts, difficult to repair after wear, can not be used for variable pump.

There are many famous gear pump brands, such as 

Komatsu; Parker; rexroth;stauff;hydac;atos;aeroquip;vickers;moog; hawe; kawasaki; eaton;kyb; sumitomo;nachi; uchida and so on.