Self-priming pump is a self-priming centrifugal pump, because of its compact structure, easy operation, stable operation, easy maintenance, high efficiency, long life and strong self-priming capability, etc., is now available Production plays an important role in life. So what exactly is the classification of each type is how to run the work, the following Xiaobian for everyone one by one answer. Self-priming pump structure and its working principle of a solution, the type and structure of self-priming pump Self-priming pump according to the different self-priming can be divided into external mixed self-priming pump, internal self-priming pump and pump Vacuum-assisted self-priming pump, which is powered by itself, can be divided into the structure of self-priming pump such as self-priming pump, water self-priming pump, self-priming pump with corrosion resistance, self-priming pump with stainless steel, . As shown (outside mixed) Self-priming pump basic structure. The main components are: pump body, pump cover, impeller, shaft, bearings and so on. The pump body has a vortex-shaped flow passage, and a large volume of gas-water separation chamber is arranged around the outer layer of the flow passage. The lower part of the pump body is cast with a seat angle as a fixed pump. Second, the self-priming pump works External self-priming pump working principle and all self-priming pump (external mix) Self-priming pump inlet located above the impeller, each shutdown, the pump can keep some water, as a The next start with. Before starting for the first time, it is necessary to add artificial self-priming water to the pump to make most of the impeller submerged in the water. After the pump is started, the water in the impeller flows to the outer edge of the impeller due to the centrifugal force, and mixes with the gas at the outer edge of the impeller to form a lapped bubble-shaped gas-water mixture. Under the action of the scraping of the tongue, the foam belt enters the gas-water separation chamber through the diffuser pipe. At this point, due to a sudden increase in water area, the flow rate decreased rapidly, the relative density of gas is small, escaping from the water and discharged by the pump outlet, the relative density of water, fell to the bottom of gas-water separation chamber, and Axial return hole back to the outer edge of the impeller, again with the gas mixture. With the continuous circulation of the above process, the degree of vacuum in the suction pipe is continuously increased, and the delivered water continuously rises along the suction pipe. When the pump is fully filled with water, the pump enters the normal working state to complete the self-priming process. Pump inlet and outlet can be hose or flange connection. When equipped with a hose, inlet hose check valve is attached to stop hose backflow. A closed single-stage impeller is installed in the scroll passage of the pump body, and a sealed chamber is formed on the pump cover. The bearing body is internally filled with grease to lubricate the bearing, the V-pulley or the coupling at the rear end of the pump shaft, and the pump or electric motor or internal combustion engine. This article is copyrighted industry interconnect (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: Zeng Fenfen (QQ / micro letter: 2355962927) starting: http: //beng.liuti.cn / (Service Hotline: 400-6030-811)
