Diaphragm pump manufacturer: flow control of diaphragm pump dosing machine
The flow control of the diaphragm pump is controlled by using a rotating control mechanism to change the piston stroke. The working principle is: rotate the main shaft of the control mechanism (you can see the position change on the dial), and use the control shaft and rolling shaft to change the shaft diameter. This kind of operation uses the slide rail on the rolling shaft to convert the axial deflection of the rack, and uses the crankshaft connecting rod to push the piston rod, thereby achieving the purpose of flow control due to the change of the piston stroke.
Diaphragm pump manufacturers: Total flow characteristics of diaphragm pumps
The flow characteristics of the diaphragm pump refer to the relationship between the corresponding flow rate of the medium flowing through the valve body and the exhaust volume (the corresponding opening of the valve body). The ideal flow characteristics actually include vertical and equal percentages (logarithm) , parabola and quick opening. Common ideal flow characteristics are vertical, equal percentage (logarithmic) and rapid opening. Parabolic flow characteristics are close to the middle between vertical and equal percentage, and can be replaced by equal percentage characteristics, while the quick opening characteristic is actually used With two-position regulation and system control, the choice of diaphragm pump characteristics is actually the choice of vertical and equal percentage flow characteristics.
The selection of flow characteristics of diaphragm pump dosing machines can be calculated theoretically, but the commonly used methods and equations are relatively complicated. At present, experience standards are mostly used, and the following aspects are actually considered:
① Analyze and select from the adjustment quality of the adjustment system;
②Consider the processing technology pipeline;
③Load change analysis.
Choosing the flow characteristics of a diaphragm pump doser can determine the shape and structure of the valve core according to its flow characteristics. However, due to their structural characteristics, it is impossible to change the spherical shape of the valve core to achieve the required flow characteristics. This This can be accomplished by changing the feedback camshaft shape of the valve positioner.
