1. Differences in working principle:

（1）气体增压泵工作原理：

(1) Working principle of gas booster pump:

气体增压泵是以压缩空气为动力源的活塞式增压泵，进气时，增压气控阀的阀芯往复切换进行工作，控制增压阀活塞以极快的速度作往复动作，随着输出压力增大一直到恒定，活塞往复速度减慢直到停止。输出压力到达恒定后，能量消耗到达低，各个部件停止工作。当保压回路压力下降时，增压阀会自动启动，补充泄漏的压力，无论什么原因导致的压力下降，增压发始终会保持回路压力恒定。

A gas booster pump is a piston type booster pump that uses compressed air as the power source. When entering the air, the valve core of the booster gas control valve switches back and forth to work, controlling the booster valve piston to reciprocate at an extremely fast speed. As the output pressure increases and remains constant, the reciprocating speed of the piston slows down until it stops. After the output pressure reaches a constant level, energy consumption reaches a low level and various components stop working. When the pressure in the pressure maintaining circuit drops, the booster valve will automatically start to supplement the leaked pressure. Regardless of the pressure drop caused by any reason, the booster engine will always maintain a constant circuit pressure.

（2）气液增压泵工作原理：

(2) Working principle of gas-liquid booster pump:

气液增压泵是一种往复式柱塞泵，以气体为动力源，增压比决定泵的大输出压力，它是利用大面积活塞端的低压气体驱动面转换为小面积活塞端的高压液体。

Gas-liquid booster pump is a reciprocating piston pump that uses gas as the power source, and the boost ratio determines the pump's large output pressure. It uses the low-pressure gas driving surface at the large piston end to convert it into high-pressure liquid at the small piston end.

当驱动活塞向后运行时，增压泵将液体吸入泵内，入口处的单向阀此时打开，出口单向阀关闭。活塞向前运行时，在液体一侧会形成一定压力，此时入口处单向阀关闭，出口处单向阀打开，高压液体就从出口处流出。

When the driving piston runs backwards, the booster pump sucks the liquid into the pump, and the one-way valve at the inlet opens and the outlet one-way valve closes. When the piston moves forward, a certain pressure will be formed on one side of the liquid. At this time, the one-way valve at the inlet is closed, and the one-way valve at the outlet is opened. High pressure liquid will flow out from the outlet.

气液增压泵能够实现自动循环，当出口压力升高时，泵就会减速运行，并对活塞产生一定的阻力；当力平衡时，泵会自动停止运行，此时高压活塞端压力与液体压力达到平衡；活塞保持静止，此时能量消耗低，无油温之困扰，各部件停止工作。当出口压力降低或气体驱动压力增加时，液泵会自动启动运行。

The gas-liquid booster pump can achieve automatic circulation. When the outlet pressure increases, the pump will slow down and produce a certain resistance to the piston; When the force is balanced, the pump will automatically stop running, and at this time, the pressure at the high-pressure piston end reaches equilibrium with the liquid pressure; The piston remains stationary, with low energy consumption and no oil temperature issues, and all components stop working. When the outlet pressure decreases or the gas drive pressure increases, the liquid pump will automatically start running.

2、种类上的区别：

2. Differences in types:

虽然两者都是气动增压泵，但前者是活塞式泵，增压介质是气体，如压缩空气、氮气、二氧化碳、水蒸气、天然气等，后者是柱塞式泵，增压介质是液体，如水、煤油、液压油、石油、乳液等。

Although both are pneumatic booster pumps, the former is a piston pump, and the booster medium is gas, such as compressed air, nitrogen, carbon dioxide, water vapor, natural gas, etc. The latter is a plunger pump, and the booster medium is liquid, such as water, kerosene, hydraulic oil, petroleum, lotion, etc.

气体增压泵，气液增压泵驱动组件的工作原理是相同的，但是压力不一样，因为气体是可压缩的，液体的压缩性可以忽略。

The working principle of gas booster pump and gas-liquid booster pump drive components is the same, but the pressure is different, because the gas is compressible, and the compressibility of the liquid can be ignored.