风囊泵与隔膜泵区别

　　气动风囊泵与气动隔膜泵在多个方面存在显著的区别，主要包括工作原理、结构、性能特点以及适用场景等。

一、工作原理

　　气动风囊泵：利用压缩空气作为动力源，通过换向阀精确控制压缩空气的流向，使两个气相工作腔交替工作。风囊泵中的风囊在压缩空气的作用下发生形变并往复移动，从而驱动液体的输送。风囊泵的两个风囊将泵腔明确划分为两个独立的工作腔，每个工作腔又进一步细分为气相和液相部分，通过液相腔的交替吸液排液，实现对液体的有效输送。

　　气动隔膜泵：同样采用压缩空气为动力源，但其工作原理是压缩空气通过进气口进入泵壳体时产生负压，将液体从放气口抽出。气动隔膜泵依靠隔膜片的来回鼓动来改变工作室容积，从而吸入和排出液体。其构造主要包括气马达、液流体盖和隔膜组件等部分。

二、结构差异

　　气动风囊泵：采用风囊结构，风囊之间用连接轴连接，每个工作腔分为气相工作腔和液相工作腔两部分。这种结构使得风囊泵在连续工作情况下具有更长的使用寿命，且液体脉动较小。

　　气动隔膜泵：主要由气马达、液流体盖和隔膜组件等部分组成，其中隔膜是核心部件。隔膜泵的结构相对简单，但隔膜的材质和性能对泵的整体性能有较大影响。

三、性能特点

　　气动风囊泵：

　　耐腐蚀性、耐高温性更强，好高使用温度可达到210℃。

　　输送的液体脉动较小，如在管路中加装脉冲缓冲器，脉动将会大幅度减小。

　　在流体路径中没有任何叶轮部件，不会产生微型气泡、粒子和离子污染，适合半导体等洁净度要求较高的行业使用。

　　使用寿命长，更适用于连续工作情况。

　　气动隔膜泵：

　　具有自吸功能，可空转运行。

　　无机械密封，不会产生颗粒及污染。

　　适用于中高粘度的流体。

　　接地后不产生火花，工作中无热量产生，可在易燃易爆的环境中使用。

　　可通过含颗粒液体。

　　通过调整进气压力和流量可调整液体输出压力。

　　成本较低。

四、适用场景

　　气动风囊泵：由于其耐腐蚀性、耐高温性和低脉动等特性，更适用于对介质要求高纯度、不允许污染的行业，如半导体、电子、制药等。

　　气动隔膜泵：由于其广泛的适用性和较低的成本，适用于各种腐蚀性液体、带颗粒的液体、高粘度、易挥发、易燃、剧毒的液体的输送。在化工、石油、制药、食品等行业有广泛应用。

　　综上所述，气动风囊泵与气动隔膜泵在工作原理、结构、性能特点和适用场景等方面均存在显著差异。选择哪种泵需要根据具体的使用环境和需求进行权衡。

　　Pneumatic airbag pumps and pneumatic diaphragm pumps in a number of aspects there are significant differences, mainly including the working principle, structure, performance characteristics and applicable scenes.

　　First, the principle of work

　　Pneumatic airbag pump: the use of compressed air as a power source, through the reversing valve to accurately control the flow of compressed air, so that the two air-phase working chamber work alternately. The airbag in the airbag pump under the action of compressed air deformation and reciprocating movement, so as to drive the liquid transportation. The two airbags of the airbag pump will clearly divide the pump cavity into two independent working chambers, and each working chamber is further subdivided into the gas phase and liquid phase part, through the liquid phase cavity of the alternating suction and discharge of liquid, to realize the effective transportation of liquid.

　　Air-operated diaphragm pump: the same compressed air as a power source, but its working principle is compressed air through the air inlet into the pump casing when the negative pressure is generated, the liquid from the discharge port to pump out. Air-operated diaphragm pumps rely on the diaphragm piece of the drum back and forth to change the studio volume, so as to inhale and discharge the liquid. Its structure mainly includes air motor, liquid body cover and diaphragm assembly and other parts.

　　Second, the structural differences

　　Pneumatic airbag pump: the airbag structure, the airbag is connected with a connecting shaft, and each working chamber is divided into two parts: the gas-phase working chamber and the liquid-phase working chamber. This structure makes the airbag pump have a longer service life in continuous work, and the liquid pulsation is smaller.

　　Air operated diaphragm pump: mainly composed of air motor, liquid fluid cover and diaphragm assembly, of which the diaphragm is the core component. The structure of diaphragm pump is relatively simple, but the material and performance of the diaphragm have a greater impact on the overall performance of the pump.

　　Third, the performance characteristics

　　Pneumatic air bladder pump:

　　Corrosion resistance, high temperature resistance is stronger, good high use temperature can reach 210 ℃.

　　Conveyance of liquid pulsation is small, such as the addition of pulse buffer in the pipeline, pulsation will be greatly reduced.

　　In the fluid path without any impeller parts, will not produce micro-bubbles, particles and ion pollution, suitable for semiconductor and other cleanliness requirements of the industry use.

　　Long service life, more suitable for continuous work situation.

　　Air operated diaphragm pump:

　　With self-priming function, can be idle running.

　　No mechanical seal, will not produce particles and pollution.

　　Suitable for medium and high viscosity fluids.

　　No sparks after grounding, no heat generation in work, can be used in flammable and explosive environment.

　　Can pass liquids containing particles.

　　Liquid output pressure can be adjusted by adjusting inlet pressure and flow rate.

　　Lower cost.

　　Fourth, the applicable scene

　　Pneumatic air bladder pump: Because of its corrosion resistance, high temperature resistance and low pulsation, it is more suitable for industries that require high purity of medium and do not allow contamination, such as semiconductor, electronics and pharmaceuticals.

　　Air operated diaphragm pump: due to its wide applicability and low cost, it is suitable for the transportation of all kinds of corrosive liquids, liquids with particles, liquids with high viscosity, volatile, flammable and highly toxic. It is widely used in chemical, petroleum, pharmaceutical, food and other industries.

　　In summary, there are significant differences between pneumatic airbag pumps and pneumatic diaphragm pumps in terms of working principle, structure, performance characteristics and applicable scenes. Which pump to choose needs to be weighed according to the specific use of the environment and demand.