Rotor Rotation for Material Conveyance
The core component of a single - head rotary - pump filling machine is the rotary pump. The rotor rotates within the pump cavity. When the rotor turns, a partial vacuum is formed at the inlet of the pump cavity. This is because the space between the rotor and the pump cavity keeps changing. During the rotation, the space increases, causing liquids such as hand sanitizer to be sucked into the pump cavity under the action of atmospheric pressure.
For example, imagine a simple model where the rotor is like a wheel with vanes rotating inside a closed cavity. As the vanes turn, the spaces between adjacent vanes are like small containers. When the space of these containers becomes larger, the liquid is sucked in.
Precise Control of Filling Volume
The rotary pump controls the rotational speed of the rotor through drive devices such as motors. Since there is a direct relationship between the rotational speed of the rotor and the liquid conveyance volume, precise control of the filling volume can be achieved by accurately controlling the rotational speed of the rotor.
For instance, if a certain number of rotations per minute is set for the rotor, based on the design parameters of the pump and the properties of the liquid (such as viscosity), the volume of liquid conveyed per rotation can be calculated, thus enabling the control of specific filling volumes like 250 milliliters. At the same time, some advanced filling machines are also equipped with high - precision sensors to monitor the filling volume in real - time. When the set 250 - milliliter mark is reached, the filling stops in a timely manner.
Implementation of the Filling Process
The hand sanitizer sucked in and precisely measured by the rotary pump is conveyed to the filling head through the filling pipeline under pressure. The filling head is usually located above the bottle, and the liquid flows into the bottle under the combined action of gravity and the pressure of the pump, completing the filling process.
Moreover, to ensure the accuracy and stability of filling, some filling machines are also equipped with a liquid - level control system. For example, when the bottle is nearly full, the system automatically adjusts the liquid flow rate to prevent overflow. At the same time, after filling is completed, an anti - drip device can be used to prevent liquid from dripping at the filling head.
