High cavitation-resistant water-spraying propelling pump perforated at rim of impeller

Abstract

The invention discloses a high cavitation-resistant water-spraying propelling pump perforated at the rim of an impeller. The pump comprises a water-absorbing bend, a suction straight tube, the impeller, a guide vane, a nozzle, a guide vane caudal vertebra and a main shaft. The outlet of the water-absorbing bent is connected to the inlet of the suction straight tube, the outlet of the suction straight tube is connected to the inlet of the impeller, the outlet of the impeller is successively connected to the guide vane and the nozzle, the guide vane caudal vertebra is connected to the tail portion of the guide vane, and the impeller is fixed on the main shaft through a key; a hole in the rim of the impeller is formed in the outer wall of the impeller at the rim of an impeller blade of the impeller of the impeller blade, the hole in the rim of the impeller is a hole in the rim of the outer wall surface of the impeller at the rim of the impeller blade, and the hole in the rim of the impeller is in a shape of an annular runner which is formed by rotatable sweeping of a meridional flow channel according to a rotary shaft. According to the pump disclosed by the invention, a local high pressure fluid at the rim of the impeller is imported to the front edge, close to the rim, of the impeller blade through the hole at the rim, so that the pressure of an impeller blade inlet region is increased to inhibit cavitation, the high cavitation-resisting problem of the high-speed efficient water-spraying propelling pump is solved, and meanwhile, the structure meets the design space limitation of the spray pump.

Description

technical field [0001] The present invention relates to the technical field of water-jet propulsion pumps, in particular to a highly anti-cavitation water-jet propulsion pump with openings in the rim of the impeller. Strong corrosion resistance, low vibration and noise and other special requirements. Background technique [0002] With the continuous development of the shipbuilding industry, especially the continuous challenges brought by war to military technology, propeller technology has become the key to determining maritime warfare. Stealth technology and precision guidance technology require propellers not only to have high speed, but also to have low noise . In terms of military applications, water jet propulsion technology has been used in high-speed attack boats, high-speed car-passenger ferries, naval high-speed transport ships, frigates, corvettes, amphibious armored vehicles and quiet nuclear submarines. special advantage. The water-jet propulsion pump uses the...

AI Technical Summary

Problems solved by technology

Another way is to increase the speed to improve the efficiency of the propulsion pump, but increasing the speed will cause cavitation in the impeller accompanied by noise and hydraulic vibration, which will seriously affect the safe and stable operation of the propulsion pump

Images