Hydrogen Circulation Pump

The hydrogen circulation pump is responsible for continuously providing high-purity hydrogen with a certain pressure and flow rate to the fuel cell stack to ensure the normal electrochemical reaction in the fuel cell stack. For the heart of the fuel cell engine, whether the hydrogen as the "blood" can circulate and react efficiently is the key to whether the power can be smoothly output. The hydrogen circulation pump is like a "pacemaker", responsible for allowing the hydrogen as the "blood" to normally provide power for the machine.

Mechanical pumps for hydrogen circulation include Roots pumps, claw pumps, vortex pumps and centrifugal pumps.

Four types of mechanical pumps for hydrogen circulation

Roots pump

The cam pump is commonly known as the roots pump.The two rotors are driven by shaft-end gears and rotate synchronously in opposite directions.

Vortex pump

The vortex pump is also called side flow pump, friction pump,regenerative pump, turbo pump and circumferential pump. The vortex pump is a vane pump, and it is a kind of small flow, high-head pump.

Claw pump

The claw HCP has two mutually conjugated claw-shaped rotors that rotate in opposite directions.The rotor is driven by a pair of synchronized high-precision gears to rotate and fix the phase.

Centrifugal pump

The basic principle of the centrifugal pump is to use the high-speed rotating impeller to drive the gas to rotate together and produce centrifugal force, thereby transferring energy to the gas, increasing the gas pressure and speed, and the gas obtains pressure energy and kinetic energy.