7results about How to "Improve hydraulic performance" patented technology

The pressure vessel comprises a shell, a hanging basket and a vortex suppression piece, in the using process, the hanging basket is used for arranging a reactor core, a coolant enters through an input port in the shell, then flows into an annular descending channel formed between the outer side wall of the hanging basket and the shell, continuously flows downwards along the descending channel, and is cooled to the outside, and the vortex suppression piece is arranged in the shell. And the lower cavity area at the bottom of the shell is reached. After entering the lower cavity at the bottom of the shell, the coolant is changed in flowing direction by the arc-shaped wall surface at the bottom of the shell to flow upwards, is in contact with the vortex suppression piece arranged in the shell and then continuously flows upwards in the area, and the upwards flowing coolant enters and flows through the reactor core lower plate, then enters the reactor core area used in the hanging basket and flows through the reactor core area to form a reactor core. And finally, the coolant flows out of the pressure vessel through the output port in the shell, and the vortex suppression plate can enable the coolant entering the reactor core to be distributed more uniformly, so that the reactor core is effectively cooled.

The electronic water pump comprises a machine shell, a volute, a rear cover and an independent motor stator plastic coating assembly, a containing cavity is formed in the machine shell, the upper end of the machine shell is connected with the volute, the lower end of the machine shell is connected with the rear cover in a sealed mode, the volute is communicated with the containing cavity, and the motor stator plastic coating assembly is arranged in the containing cavity. The motor stator plastic-coated assembly is a module which is assembled in advance and is detachably assembled in the accommodating cavity, the motor stator plastic-coated assembly comprises a stator plastic-coated body, a rotor assembly and a placing plate, the stator plastic-coated body comprises a stator assembly and a plastic-coated layer, the plastic-coated layer is coated outside the stator assembly, and the rotor assembly is detachably assembled in the placing plate. An annular sealing groove used for containing a sealing ring is formed between the outer side face of the stator plastic-coated body and the inner side face of the machine shell, the rotor assembly is arranged in the stator plastic-coated body, and the placing plate is connected with the lower end of the stator plastic-coated body through the fixing assembly. By reducing the gap between the motor stator and the rotor, the product performance is effectively improved, product parts are reduced, and the shell structure is simplified.

This application relates to a hydraulic design method for submersible pumps, and pertains to the technical field of pumps. The meridional streamline function of the impeller satisfies the following relationship: Let the meridional streamline function be F(x), then... When 0 <x<x 1 hour, When x 1 <x<x 2 hour, When x 2 <x<x 3 hour, In the formula: x is the horizontal distance from the impeller inlet; x 1 It is the horizontal distance between the intersection of the inlet arc segment and the straight segment and the impeller inlet; x 2 It is the horizontal distance between the intersection of the arc segment and the straight segment at the outlet and the impeller inlet; x 3 It is the horizontal length of the entire impeller meridional plane; k is a coefficient, and c is a constant. This application has the advantages of reducing wear caused by the impact of silt on the guide shell, and improving the pump's operational reliability and service life.

The application provides a design method for a streamlined space guide vane of a multistage centrifugal pump, and belongs to the technical field of hydraulic machinery. The design method for the streamlined space guide vane of the multistage centrifugal pump directly controls the guide vane profile according to a curve equation, can adapt to various change conditions, significantly improves the guide vane design efficiency under the condition of controlling the direction of the inlet and outlet flow passages, and has extremely important role and value for improving the hydraulic performance of the space guide vane. The positive and negative guide vanes of the design method for the streamlined space guide vane of the multistage centrifugal pump are an integral streamline, have obvious optimization effect, are simple in design calculation, and are high in adaptability.

The invention provides a foldable guide pipe pump and an impeller thereof, the impeller comprises a hub and a plurality of blades, the hub is rotatably and radially supported at the near end part and the far end part of the hub respectively, and the impeller has a compressed state and a natural unfolding state; and when the impeller is in a natural unfolding state, the diameter of the far-end endpoint of each blade is smaller than that of the near-end endpoint of each blade. The impeller can reduce or avoid blood cavitation, reduce blood damage and improve blood compatibility on the premise of maintaining high hydraulic performance.

The utility model discloses an ultrahigh-water-head small-flow pump turbine runner blade. The blade comprises a blade wrap angle, a blade inlet setting angle, a blade outlet setting angle, a high-low pressure side diameter ratio and a guide blade relative height. The runner blade is scientific and reasonable in structural design, meets the design requirement of a runner, has better hydraulic performance, can greatly reduce the water storage capacity scale, is short in construction period, can accelerate the development of pumped storage, and is suitable for large-scale popularization and application, and the ultra-high-water-head small-flow pump turbine is constructed by utilizing the runner blade of the ultra-high-water-head small-flow pump turbine. The problem of in-situ consumption of renewable energy sources is effectively solved, and good social and economic benefits are achieved.

The utility model discloses a kind of double-outlet bifurcated labyrinth flow passage irrigator, including the water inlet pipe being connected with drip irrigation pipe, the water inlet pipe is connected with the water inlet of irrigator body, the water inlet output end both sides are respectively connected with a bifurcated labyrinth flow passage input end, the bifurcated labyrinth flow passage output end is connected with water outlet pipe through water outlet;The flow passage of the utility model's irrigator is bifurcated labyrinth flow passage, hydraulic performance is excellent, with pressure compensation performance, flow passage is divided into main flow passage and bifurcated flow passage, anti-blocking performance is better, and irrigator is provided with left and right two water outlets, can simultaneously irrigate two rows of crops;Secondly, irrigator structure is simple, convenient to prepare, low in cost, it is convenient for large-scale production, more suitable for large area, long distance drip irrigation operation.