Stainless steel explosion-proof centrifugal pump impeller structure and structure diagram
The centrifugal pump uses the impeller to rotate to make the water produce centrifugal movement to work. Before starting the stainless steel explosion-proof centrifugal pump, the pump casing and suction pipe must be filled with water, and then the motor is started, so that the pump shaft drives the impeller and water to make high-speed rotation. The water generates centrifugal movement and is thrown to the outer edge of the impeller. The flow channel of the shell flows into the pressurized water pipeline of the water pump. Water pump impeller is also called working wheel or runner. It is a part that converts energy. Its geometry and size have a decisive influence on the performance of the centrifugal pump, which is determined by hydraulic calculation. When choosing impeller material, in addition to considering the mechanical strength under the action of centrifugal force. Also consider the wear and corrosion resistance of the material. At present, most centrifugal pump impellers are made of cast iron, cast steel and bronze.
Stainless steel explosion-proof centrifugal pump impeller is divided into single suction type and double suction type according to the structure. The single-suction impeller is shown in Figure 2-3. It absorbs water on one side, and the front and rear covers of the impeller are asymmetrical. The single-suction impeller is used for single-suction stainless steel explosion-proof centrifugal pumps. The double-suction impeller absorbs water on both sides as shown in Figure 2-4, and the impeller cover is symmetrical. The double-suction impeller is used for double-suction stainless steel explosion-proof centrifugal pumps.
The centrifugal pump impeller is divided into three types: closed, open and semi-open according to its cover. An impeller with two cover plates is called a closed impeller, as shown in Figure 2-5(a). Between the cover plates, there are 6 to 12 blades that are bent backward. This kind of impeller has high efficiency and is not widely used. The impeller with only the rear cover plate and no front cover plate is called a semi-open impeller, as shown in Figure 2-5(b). An impeller with only blades and no cover is called an open impeller, as shown in Figure 2-5(c). Half-open and open impellers have fewer blades, generally only 2 to 5 blades. It is mostly used to transport sewage pumps containing solid, fibrous and suspended matter.
