蠕動(dòng)泵就像用手指夾擠一根充滿流體的軟管，隨著手指向前滑動(dòng)管內(nèi)流體向前移動(dòng)。蠕動(dòng)泵也是這個(gè)原理只是由滾輪取代了手指。通過對(duì)泵的彈性輸送軟管交替進(jìn)行擠壓和釋放來泵送流體。就像用兩根手指夾擠軟管一樣,隨著手指的移動(dòng),管內(nèi)形成負(fù)壓,液體隨之流動(dòng)。
A peristaltic pump is like squeezing a hose filled with fluid with your fingers, sliding the fluid inside the tube forward with your fingers. The peristaltic pump is also based on this principle, with the roller replacing the finger. Pump fluid by alternately squeezing and releasing the elastic delivery hose of the pump. Just like squeezing a hose with two fingers, as the fingers move, negative pressure forms inside the tube, and the liquid flows accordingly.
蠕動(dòng)泵就是在兩個(gè)轉(zhuǎn)輥?zhàn)又g的一段泵管形成“枕”形流體?！罢怼钡捏w積取決于泵管的內(nèi)徑和轉(zhuǎn)子的幾何特征。流量取決于泵頭的轉(zhuǎn)速與“枕”的尺寸、轉(zhuǎn)子每轉(zhuǎn)一圈產(chǎn)生的“枕”的個(gè)數(shù)這三項(xiàng)參數(shù)之乘積。“枕”的尺寸一般為常量（泵送粘性特別大的流體時(shí)除外）。
A peristaltic pump is a section of pump pipe between two rotating rollers that forms a "pillow" shaped fluid. The volume of the pillow depends on the inner diameter of the pump tube and the geometric characteristics of the rotor. The flow rate depends on the product of the speed of the pump head and the size of the "pillow", as well as the number of "pillows" produced per revolution of the rotor. The size of a pillow is generally constant (except when pumping fluids with particularly high viscosity).
拿轉(zhuǎn)子直徑相同的泵相比較，產(chǎn)生較大“枕”體積的泵，其轉(zhuǎn)子每轉(zhuǎn)一圈所輸送的流體體積也較大，但產(chǎn)生的脈動(dòng)度也較大。這與膜閥的情形相似。而產(chǎn)生較小“枕”體積的泵，其轉(zhuǎn)子每轉(zhuǎn)一圈所輸送的流體體積也較?。欢?，快速、連續(xù)地形成的小“枕”使流體的流動(dòng)較為平穩(wěn)。這與齒輪泵的工作方式相似。
Compared to pumps with the same rotor diameter, pumps that produce a larger "pillow" volume also transport a larger volume of fluid per revolution of the rotor, but also produce greater pulsation. This is similar to the situation of membrane valves. A pump that produces a smaller pillow volume also delivers a smaller volume of fluid per revolution of its rotor; Moreover, the rapid and continuous formation of small "pillows" makes the fluid flow more stable. This is similar to the working mode of a gear pump.
