Water jet propelling device guide blade processing method

Abstract

The invention relates to a method for processing the blades of injection propulsion unit, wherein it controls the process allowance of casting element, to improve the check and machine on each shaping surface of blade 2; it uses ultrasonic wave detector to detect the wall thickness of oil hole 25, improve the accuracy of curvature of blade 2 in double-phase stainless blade 1, and the control ability of blade 2; the processing accuracy of long lubricant hole of blade 2 is improved, to improve the process efficiency and accuracy of blades 1, 2. The invention's quality can reach international standard.

Description

technical field [0001] The invention relates to a processing method for blade supporting elements or blades of a non-variable fluid propulsion device. Specifically, it is a processing method for a guide vane body of a water jet propulsion device. Background technique [0002] The water jet propulsion device is a new type of ship propeller. Its working method is to use the reaction force of the sprayed water flow of the mixed-flow propulsion pump to propel the ship forward, and realize the steering and reversing of the ship's course through the steering and reversing device. Compared with the propeller, it has many advantages such as strong anti-cavitation ability, small attachment resistance, low underwater noise, good protection performance, simple transmission mechanism, strong ability to adapt to variable working conditions and high ship maneuverability. It is used in many high-performance ships. began to be widely used. The guide vane body is an important part of the w...

AI Technical Summary

Problems solved by technology

This processing method is difficult to meet the requirements of the guide vane 2 blade shape and wall thickness from thick to thin smooth transition and guide vane 2 position accuracy

Since there are four oil cylinder ear seats 14 distributed outside the guide vane body 1, there is a relative positional relationship between the guide vane 2 and the outer wall surface 15 of the flow channel, the four oil cylinder ear seats 14, the inner wall surface 16 of the flow channel, and the cone bearing seat. , the shape and positional relationship of the guide vane 2 has a great influence on the operation of the guide vane body 1 and even the propulsion device. The blade shape deviation of the guide vane 2 will directly affect the efficiency of the jet pump, and in serious cases, the guide vane body 1 will be scrapped

And because oil through hole 25 is to carry out deep hole processing on the thin wall of guide vane 2, the position of oil through hole 25 is difficult to justify, it is difficult to guarantee the wall thickness requirement from oil through hole 25 to guide vane 2 outer wall in drilling process After the oil hole 25 is processed, it needs to pass the pressure test under the pump pressure of 0.8MPa for 2 hours. If the wall thickness of the oil hole 25 is not enough, it will easily cause leakage, which will easily lead to the casting of the guide vane body 1 due to leakage. scrapped

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