The working principle of Jieheng peristaltic pump The peristaltic pump is also called constant flow pump and hose pump, and its mechanical principle is very simple. It pumps fluid by alternately squeezing and releasing the pump tubing. Just like using two fingers to squeeze a hose filled with liquid, as the finger moves, a negative pressure is created inside the tube, and the liquid flows with it!
The peristaltic pump is to pump the hose between the rotor and the stator to achieve the purpose of pumping. However, we use stable motors, standard pump heads and modern control technology. In operation, a section of the pump tube between the two rollers forms a pump chamber, the size of which depends on the inner diameter of the pump tube and the size of the rotor. The theoretical flow is the product of the volume of the pump chamber, the number of pump chambers within 360°, and the pump speed. Comparing pumps with the same diameter of rotation, the pump that produces the larger pump chamber has a larger volume of fluid delivered per revolution of the rotor, but the generated pulse is also larger. Conversely, pumps that produce smaller pump chambers have a smaller volume of fluid delivered per revolution of the rotor, but produce smaller pulses, but fast, continuous pumping can ideally reduce the pulse, so For small flow and very small pulse requirements, the choice of pump head is critical.
Working principle diagram
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The peristaltic pump is to pump the hose between the rotor and the stator to achieve the purpose of pumping. However, we use stable motors, standard pump heads and modern control technology. In operation, a section of the pump tube between the two rollers forms a pump chamber, the size of which depends on the inner diameter of the pump tube and the size of the rotor. The theoretical flow is the product of the volume of the pump chamber, the number of pump chambers within 360°, and the pump speed. Comparing pumps with the same diameter of rotation, the pump that produces the larger pump chamber has a larger volume of fluid delivered per revolution of the rotor, but the generated pulse is also larger. Conversely, pumps that produce smaller pump chambers have a smaller volume of fluid delivered per revolution of the rotor, but produce smaller pulses, but fast, continuous pumping can ideally reduce the pulse, so For small flow and very small pulse requirements, the choice of pump head is critical.
Working principle diagram
| The peristaltic pump head is divided into two parts: the rotor and the pump casing. The pump tube is fixed between the rotor and the pump casing, so the pressure tube clearance is very important. | |
| The rollers on the rotor are run through the pump tube in sequence to create a negative pressure! After the roller is over, the pump tube is restored by its own elasticity, and a vacuum is formed at the suction end of the pump tube, and the liquid flows accordingly. | |
| There is a distance between the rollers, which will cause the pump tube to form a closed space, that is, the pump chamber. The volume of the pump chamber is related to the inner diameter of the pump tube and the diameter and number of revolutions of the runner. The flow rate depends on the speed of the pump head and the volume of the pump chamber. | |
| In-depth explanation: 1. The negative pressure and liquid suction of the peristaltic pump are generated by the elastic force of the pump tube itself. The rebound speed and time of the pump tube are fixed, and the resilience of the pump tube is also fixed. Because of this characteristic, it is determined that the suction stroke generated by the peristaltic pump is affected by the hardness of the pump tube. The common experimental peristaltic pump cannot quickly transport the liquid with poor fluidity and slow flow, and it is necessary to transport these fluidity and high viscosity. The liquid requires a higher pressure, higher resilience pump with a higher resilience. 2. Each revolution of the peristaltic pump will produce a constant amount of liquid. Therefore, the peristaltic pump can change the flow rate by adjusting the rotation speed of the pump, and the precision of the delivery is also very high. | |
| Advantages of Jieheng peristaltic pump: 1. No pollution: the fluid only contacts the pump tube and does not touch the pump body. 2, high precision: repeatability, high stability accuracy 3, low shear force: is the ideal tool for conveying shear sensitive and aggressive fluids 4, good sealing: with good self-priming ability, can be idling, can prevent backflow 5, peristaltic pump maintenance is simple: no valves and seals, the hose is the only wearing parts 6, can pump liquid, gas, solid or multiphase mixture |
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