How much do you know about single suction pumps?
In the selection process of single suction pump, the parameters and pump performance after determining the pump type are the problems that buyers need to confirm and pay attention to. Because each company's single suction pump model is not the same, the parameters and performance are not the same, so it is still necessary to shop around and choose the right open pump.
The principle of a single suction pump is much the same. During the working process, the inlet liquid enters the central area of the impeller at the same time, and the high-speed rotating impeller throws the liquid out under the action of centrifugal force, thus forming a low pressure area in the center of the impeller. Under the action of atmospheric pressure, the inlet liquid continues to flow to the low pressure area, that is, the cycle process of entering the center of the impeller and then being thrown out.
The basic structure of the single suction pump consists of eight parts, namely: impeller, pump body, pump cover, water retaining ring, pump shaft, bearing, sealing ring, stuffing box and axial force balancing device.
The impeller is installed in the pump housing and fastened to the pump shaft, which is connected to the motor by coupling technology, and the motor drives the pump shaft and the impeller to rotate. The middle of the pump has a suction and a suction pipe. The liquid enters the pump through the bottom valve and suction pipe. The drain port on the pump housing is connected with the discharge pipe. When the pump speed is constant, the pressure head and flow rate are related to the impeller diameter. Before starting the pump, the pump shell and suction tube must be filled with water, and then start the motor, so that the pump shaft drives the impeller and water to rotate at a high speed, and the water will have centrifugal movement, be thrown to the outer edge of the impeller, and flow into the pressure tube of the pump through the flow channel of the volute pump shell.
The principle of the single suction pump is similar to that of the ordinary centrifugal pump, but there is not much difference in principle. The single suction pump increases the flow rate of the middle open pump to meet the larger flow requirements. Designers continue to study and improve, the single suction pump will continue to improve the structure and other parts to improve the performance of the pump.
The short suction pipe of the single suction pump is in the shape of a shrink cone and is integrated with the pump cover. Remove the pump cover to clean the inside of the pump body and load and unload the impeller. Replace the big mouth ring. The impeller is installed at one end of the shaft and is secured with a nut. The pump shaft is arranged horizontally and supported by a single row of radial bearings. Lubricate the bearing with thin oil, and the dipstick can detect the oil level in the bearing box. A packing box is arranged at the position where the pump shaft passes through the pump body. A rotating soft packing and a water seal ring are placed in the packing box and pressed by the gland. A channel is cast in the pump body to lead the pressure water in the pump to the water seal ring. The axial thrust of the impeller is balanced by the balance hole. The inner flow channel of the pump body is in the shape of a worm, and the outlet flange is cast into one. It can be rotated relative to the support to change the direction of the pump outlet so that it is arranged upwards or horizontally. The outlet flange of the pump body and the inlet flange of the pump cover are respectively provided with screw holes for assembling pressure gauges and vacuum gauges. The square bolt in the lower part of the pump body is used to drain the water in the pump to prevent the pump body from freezing and cracking when the pump is stopped in winter.
Impeller, pump cover, pump body and support are cast iron. The pump shaft is made of high quality carbon steel.
The single suction pump is small in size, light in weight, simple in structure, and easy to handle and maintain. It's used to treat water at the bottom of Wells. Or as a compressed air station water supply pump, and other auxiliary water supply and drainage facilities.