35results about How to "Reduce vortex intensity" patented technology

The invention discloses a turbine type stirrer used for molten iron mechanical stirring desulfuration, comprising a rotating shaft, a wheel hub and three stirring vanes, wherein, each stirring vane comprises a stirring vane metal core and is evenly distributed at the periphery of the wheel hub; the surface facing melt iron, the surface deviating melt iron and the side face of the stirring vane are all inclined planes inclining forwards from bottom to top, and the angles of inclination alpha, beta and gamma respectively satisfy the following conditions: alpha is more than or equal to 1 degree and less than or equal to 10 degrees, beta is more than or equal to alpha and less than or equal to 15 degrees, and gamma is more than or equal to 0 degree and less than or equal to 3 degrees; the stirring vane metal core is in eccentric arrangement; the flat surface on which the thickness symmetry plane of the stirring vane metal core is located is a first vertical plane; the flat surface parallel to the first vertical plane and passing the centre line of the rotating shaft is a second vertical plane; the first vertical plane is overlapped with the second vertical plane horizontally moving a distance of L towards the direction of the surface facing melt iron, wherein, L satisfies the condition that L is more than 0 and less than or equal to (d-a)/2; d is the diameter of the metal core of the rotating shaft; and a is the thickness of the stirring vane metal core; by applying the invention, the stirring power consumption of the invention is low, the sticky dregs between the stirring vanes are less; and the dynamical condition of stirring desulfuration is good.

The invention relates to a low specific speed impeller with the function of drag reduction by grooves. The low specific speed impeller provided with a dry three-phase asynchronous motor or a submersible motor is characterized in that series of grooves are made on pressure surfaces and suction surfaces of blades by machining or casting, and the grooves are 60-degree and 2-4mm in depth. The low specific speed impeller has the advantages that vortexes in an impeller passage are less strong, surface turbulent energy loss is reduced for the low specific speed impeller, and positive effects on improving the efficiency of a low specific speed pump, saving energy, absorbing shock and reducing noise are achieved.

The invention discloses a novel variable frequency control radiator device. The novel variable frequency control radiator device comprises an outer shell and a surface cooler, wherein a direct current variable frequency motor is arranged inside the outer shell; the direct current variable frequency motor drives a cross-flow impeller to rotate; the direct current variable frequency motor and the cross-flow impeller are mounted inside a combined guide mechanism inside the outer shell; a variable frequency controller is arranged at one end of the cross-flow impeller; the cross-flow impeller comprises a plurality of blades and a fixing disc used for fixing the blades; the blades are S-shaped structures; one parts of the blades extend out of the edge of the fixing disc; and the other parts of the blades are fixed in arc-shaped holes in the edge of the fixing disc. According to the variable frequency control radiator device, the fan coil radiator at the tail end can be controlled through frequency conversion, the system operation is automatically adjusted according to practical load, the useless energy consumption is reduced, the high energy consumption problem of a household central air conditioner is solved, the air blasting effect is better, the noise is low, and the vortex intensity inside the cross-flow impeller can be reduced.

The present invention is collision atomizing eddy current chamber for internal combustion engine and belongs to the field of mixed gas formation and combustion in internal combustion engine. The colliding stage set inside the eddy current chamber makes the primary oil beam jetted from the oil nozzle form fast even fine secondary oil beam, and the comprehensive effects of the secondary oil beam and air eddy current inside the eddy current chamber form excellent inflammable gas mixture resulting in fast and perfect combustion. The area of the connecting channel between the main combustor and the eddy current chamber is increased to lower the eddy current strength inside the eddy current chamber. The present invention results in raised economic performance, improved cold starting performance and load adaptability and obvious reduced lower-load carbon smoke exhaust, while maintaining the available compression ratio.

The invention discloses a boundary layer suction type propeller adopting large and small two-stage blades. The boundary layer suction type propeller is mounted at the tail part of the aircraft; a large rotor and a small rotor are arranged on the thruster, blades of the large rotor adopt low rotating speed, thrust of a main part is generated, and the requirement for the climbing performance of the aircraft is met. the blades of the small rotor rotate at a higher speed, so that the load of the root can be increased, the load of the blades of the propeller is close to an ideal load, and energy contained in downstream airflow of the propeller is weakened to the maximum extent.

The invention relates to a volute casing of a forward curved multi-blades centrifugal fan, comprising a volute plate, a guide ring arranged on the volute plate and an outlet arranged on the volute plate. The volute casing is characterized in that the guide ring is in a like-ellipsoid shape, wherein the short radius of the elliptic guide ring is slightly smaller than or equal to the inner radius of an impeller, and the short radius is close to a volute tongue area. Because the structure of the volute casing can take both the uniformity of inlet air and the vortex intensity of the impeller close to the guide ring into account, the inlet air condition of the volute tongue area is improved, and an area away from the volute tongue and close to the outlet of the volute casing has a better inlet air condition, thus the vortex intensity and fan noise can be reduced. Because the vortex intensity of the impeller close to the guide ring can be reduced and the circumferential uniformity of air flows of an outlet of the guide ring can be improved, through regulating the position of the elliptic guide ring on the circumference of the volute casing, the requirements of effectively reducing the noise and improving the performance of the fan can be conveniently met.