Peristaltic pump flow calculation method

Peristaltic pump flow and calculation method
How is the flow of the peristaltic pump calculated? A peristaltic pump head can be equipped with a variety of pump tubes. The flow rate generated by each pump tube of different caliber is different. The larger the inner diameter of the same peristaltic pump head, the flow generated per revolution of the peristaltic pump head. The bigger, the smaller the opposite.
Under the premise of not considering the influence of liquid viscosity on the flow rate under ideal conditions, the flow rate generated by each revolution of the peristaltic pump is the same, then if the rotation per minute produces 10ml flow rate, ie 10ml/min, if it rotates N times per minute The traffic is equal to 10 times N.
Of course, the actual situation will be somewhat different from the ideal, mainly in the following aspects:
1. Because the peristaltic pump relies on the rebound of the pump tube to draw in the liquid, the rebound of the peristaltic pump hose takes a certain amount of time. The more viscous the liquid is, the longer it takes to rebound. Therefore, when the rebound time of the pump is less than the displacement time of the peristaltic pump by one track (the rotation of the peristaltic pump is composed of two wheels, the arc of the two-wheel rotation is 180 degrees, and the circular motion made by one wheel rotating half a turn) The time required is a wheel displacement time, the higher the speed, the shorter this time). The relationship between the flow rate of the peristaltic pump and the rotational speed is a linear increase. If the time required for the rebound is greater than the time of the track displacement, that is, if the peristaltic pump hose is not fully rebounded and the wheel is pressed again, the flow generated by the peristaltic pump will rebound completely after the revolution. The resulting flow is small. Of course, if the rotational speed of the peristaltic pump is fixed, then one revolution per revolution is also fixed.
2. The greater the outlet back pressure, the discharge flow will also be affected, because the pressure of the outlet rises, the pump tube will rise, and the liquid at the discharge port will flow back. If the pressure at the discharge port is greater than the pressure generated by the pump, then the liquid Will not be discharged and cause complete reflow.
Conclusion: Therefore, when calculating the flow rate of the peristaltic pump, we must consider the increase in peristaltic pump speed and the effect of liquid viscosity on hose rebound. If the speed of the peristaltic pump is constantly changing during the conveying process, it cannot be calculated completely according to the simple product relationship. Under normal circumstances, experience tells us that a liquid with a low specific gravity of liquid that can be quickly transported, and a pump below four revolutions with a rotational speed of about 300 rpm can be calculated by the product relationship. If the viscosity is very high, consider reducing this experience speed.
Chongqing Jieheng Peristaltic Pump Co., Ltd. Peristaltic pump Constant flow pump Hose pump

Hospital Bed

Hospital Bed, also known as hospital bed, Hospital Equipment, Nursing Bed, etc., is a hospital bed used by patients when they are hospitalized in the hospital.

There are many classifications of medical beds, and the specific classification methods are as follows: According to the material, it can be divided into ABS medical beds, all stainless steel medical beds, semi-stainless steel medical beds, all steel sprayed medical beds, etc.

According to the function, it can be divided into electric medical beds and manual medical beds. Among them, electric medical beds can be divided into five-function electric medical beds and three-function electric medical beds. Manual medical beds can be divided into double-shake medical beds and single-shake medical beds. Medical beds, flat medical beds.

According to whether it can be moved, it can be divided into a wheeled medical bed and a right-angle medical bed. Among them, electric medical beds are generally movable with wheels.

In addition, there are other special function beds, such as: ultra-low three-function electric bed, Hospital Bed For Home, hospital bed with bedpan, scald rollover bed, rescue bed, mother-child bed, crib, child bed, ICU monitoring bed, examination bed, etc.

Hospital Bed,Manual Hospital Bed,Hospital Bed For Home,All Electric Hospital Bed

Haloxylon Ammodendron Medical Equipment Co., Ltd. , https://www.haloxylonhospital.com