The flow of peristaltic pump is affected by a variety of factors, the following is a detailed analysis:
First, the design parameters of peristaltic pump itself
Pressure cycle diameter: the flow rate of peristaltic pump is positively correlated with the pressure cycle diameter. The larger the diameter of the press wheel, the more liquid is squeezed into the hose at each turn, resulting in a greater flow rate.
Hose inner diameter: The flow of peristaltic pump is also positively correlated with the hose inner diameter. The larger the inner diameter of the hose, the more liquid it can hold, so the flow rate will increase accordingly.
The number of peristaltic apparatus and extrusion pressure: The number of peristaltic apparatus inside the pump head and its extrusion pressure will directly affect the flow rate of the peristaltic pump. The more the number of peristaltics, the more times the unit time extrusion, the greater the flow rate; The greater the extrusion pressure, the more medium mass can be transported per unit time, and the greater the flow rate.
Second, the operating parameters of peristaltic pump
Speed: The flow rate of peristaltic pump is positively correlated with its speed. The higher the speed, the more times the peristaltic inside the pump head squeezes the medium per unit time, thus achieving greater flow output. Therefore, by controlling the speed of the motor, the flow of the peristaltic pump can be adjusted.
Operation parameter setting: such as extrusion speed, pump head extrusion amount, working frequency and other parameters adjustment will affect the flow and pressure stability of peristaltic pump.
Third, the characteristics of the liquid transport
Liquid viscosity: The viscosity of the liquid is an important factor affecting the flow of the peristaltic pump. The higher the viscosity, the greater the flow resistance and the smaller the flow rate.
Liquid specific gravity: The greater the proportion of liquid, the smaller the flow rate.
Liquid temperature: The temperature of the liquid affects its viscosity, which in turn affects the flow rate of the peristaltic pump. Usually the higher the temperature, the viscosity of the liquid is reduced, the fluidity is better, and the flow rate will increase.
Working environment and other factors
Working environment: Changes in environmental conditions such as temperature, humidity and pressure can cause the performance of the peristaltic pump to fluctuate or decrease. Especially in high temperature environments, the material of the pump may be corroded or deformed, affecting the sealing and fluid transfer effect of the pump.
Pipeline design: Reasonable pipeline design can reduce the resistance of the fluid, reduce the pump head pressure and extrusion pressure, so as to improve the flow and pressure stability of the pump. Whether there are bubbles or blockades in the pipeline will also affect the performance of the peristaltic pump.
Suction and head: the higher the suction, the smaller the flow rate; When used in the rated pressure, the head has little effect on the flow rate of the peristaltic pump, but after exceeding the rated pressure and the limit head of the peristaltic pump, the peristaltic pump hose will expand and cause the thickness of the soft tube wall to become thinner, and the peristaltic pump will return.
In summary, the flow of peristaltic pump is related to many factors such as the design parameters of peristaltic pump itself, operating parameters, the characteristics of the conveying liquid and the working environment. In practical applications, appropriate peristaltic pump models and parameter Settings need to be selected according to specific use scenarios and needs to achieve accurate flow control.