Anti-blocking Design Of Impeller For Sanitary Centrifugal Pump

The impeller anti-blocking design of Sanitary Centrifugal Pump ensures that the pump is efficient and non-blocking. With the excellent hydraulic model, the efficiency is 3-5% higher than that of general sanitary centrifugal pumps. The self-priming height is 1 meter higher than that of general sanitary centrifugal pumps, and the self-priming time is shorter.
Sanitary centrifugal pumps all adopt the pump body structure of axial liquid return. The sanitary centrifugal pump body consists of suction chamber, liquid storage chamber, vortex chamber, liquid return hole, gas-liquid separation chamber, etc. After the sanitary centrifugal pump is started normally, the impeller sucks the liquid stored in the suction chamber and the air in the suction pipe together, and is completely mixed in the impeller. Under the action of centrifugal force, the liquid entrains the gas to flow to the outer edge of the vortex chamber, forming a white foam belt of a certain thickness and a high-speed rotating liquid ring on the outer edge of the impeller. The gas-liquid mixture enters the gas separation chamber through the diffusion tube. At this time, due to the sudden decrease in flow rate, the lighter gas is separated from the mixed liquid, and the gas continues to rise and discharge through the pump body outlet. The degassed liquid returns to the liquid storage chamber and enters the impeller again through the reflux hole, where it is mixed with the gas sucked from the suction pipe inside the impeller, and flows to the outer edge of the impeller under the action of the high-speed rotating impeller. As this process goes on over and over again, the air in the suction pipe continues to decrease until all the air is sucked out, and the sanitary centrifugal pump completes the self-priming process and is put into normal operation.

The sanitary centrifugal pump is a sewage pump with a certain self-priming ability. Its self-priming height is also limited. How to improve its self-priming height in product technology and how to improve its self-priming ability during installation and use are the focus of our research and analysis.

The sanitary centrifugal pump is known as a vacuum pump product that can pump water. It combines the structural characteristics of a water ring vacuum pump and a sanitary centrifugal pump. It can quickly generate high negative pressure and transport chemical media with high specific gravity. It uses the impeller, pump body and cover plate to form a multi-channel sealed cavity, which can be exhausted quickly. It only takes 2 seconds to fill water at a height of 3 meters and 8 seconds to fill water at a height of 5 meters. It is much more efficient than ordinary sanitary centrifugal pumps and has replaced traditional sanitary centrifugal pumps in many fields. The high suction range of the sanitary centrifugal pump produced by our company is also called high suction range sanitary centrifugal pump. The pump shaft and motor shaft are integrated, and the stability is better. It is more convenient to use than the oil drum pump in barrel loading and conveying. It can not only completely convey the medium at the bottom of the barrel, but also only takes one second to switch between two barrels directly. It can work continuously by making a multi-way joint at the import. The actual use cost is lower than that of the oil drum pump. Multiphase mixed conveying technology is a practical product in the field of conveying high-viscosity and high-specific-gravity chemical media, and sanitary food and beverage industries.
General sanitary centrifugal pumps do not need to install a bottom valve when the suction range is about 5 meters. If it exceeds 5 meters, the suction range can be increased by adding a bottom valve at the end of the inlet, which can generally be increased by about 1 meter. Minimize the horizontal distance and number of elbows at the inlet as much as possible, especially 90-degree angles and continuous turns. Like centrifugal pumps, water infusion can effectively shorten the self-priming time. Now, large-flow sanitary centrifugal pumps have added vacuum auxiliary devices. There is no need to infuse water. Start the vacuum pump to exhaust first, and the suction range is increased to more than 8 meters. The large sanitary centrifugal pumps produced by our company use the latest semi-open impellers and spiral impellers, which have good anti-clogging ability and strong cutting function. Precision CNC machining technology minimizes the gap between the impeller and the inner wall of the pump body (the impeller of the cutting sanitary centrifugal pump is embedded in the mouth ring). Choosing a sanitary centrifugal pump with a suitable suction range according to the working conditions can save costs and meet actual needs.