3results about How to "Improve cavitation performance" patented technology

This invention discloses a design method and inducer for a liquid rocket engine turbopump. Based on the overall design requirements of the liquid rocket engine, the operating conditions of the inducer are determined. According to the design requirements and empirical formulas, the basic parameters of the inducer are initially determined. Based on the range of core parameters, different combinations of core parameters are used to establish multiple initial three-dimensional models of the inducer. Simulations are performed on each of the established initial three-dimensional models to obtain the cavitation performance of the inducer. Based on the flow analysis results, the inducer with the optimal blade profile among all parameter combinations is obtained. The selected inducer with the optimal blade profile is then optimized and adjusted until the liquid rocket engine turbopump inducer with the best cavitation performance is obtained. This invention can design a liquid rocket engine turbopump inducer with good cavitation performance.

The utility model discloses a flow-limiting orifice plate for a backflow pipeline of a nuclear power plant, relates to the technical field of transportation of fluid in a pipeline, and is used for solving the problems of violent vibration and noise of the pipeline caused by cavitation of an existing flow-limiting orifice plate for a pipeline of a safety facility system. The restriction orifice plate comprises an orifice plate and a handle arranged above the orifice plate, the pore plate is round, the thickness of the pore plate is 1 / 10-1 / 4 of the inner diameter of the pipeline where the pore plate is located, a round hole is formed in the middle of the pore plate, and a chamfer is arranged on one side of the round hole; the size of the chamfer is 1 / 2-2 / 3 of the thickness of the pore plate; and the flow-limiting orifice plate is mounted in the pipeline through an ASME standard flange. The flow state behind the pore plate can be improved by adopting the oblique-angle flow limiting pore plate, the pipe nozzle jet flow of the right-angle pore plate is changed into orifice diffusion flow, the lowest pressure P2 behind the pore plate can be further increased, the cavitation phenomenon behind the pore plate is weakened, and the cavitation performance of the pore plate is improved.

The present application belongs to the technical field of shaft flow pump seal flushing, and particularly relates to a machine seal flushing self-adaptive compensation system for a polyethylene shaft flow pump. The present application comprises a pump body with a pump cavity, and a front end bearing arranged in the pump body. The present application is characterized in that it comprises a compensation type piston cylinder with an axis arranged vertically, and a return cavity of the compensation type piston cylinder is located above a feed cavity. An oil inlet compensation pipeline is connected to the return cavity at one end and to a front end flushing pipeline where a high speed pump is located at the other end. A balance pipeline is connected to the feed cavity at one end and to a lubricating cavity where the front end bearing is located at the other end. The present application realizes an instant online compensation function of flushing liquid after interruption of flushing, thereby ensuring continuous lubrication and cooling effect of the bearing in the pump cavity and ensuring safety and continuity of high density polyethylene production.