34results about How to "Reduce frontal impact" patented technology

The invention discloses a wave retaining wall for water conservancy dam. The wave retaining wall comprises a plurality of wall units, wherein each of the wall units comprises a base, a first fence wall, a second fence wall, a third fence wall and a water retaining wall, the first fence wall is arranged on the base and comprises a plurality of first wave retaining strips, and a first flow splitting gap is formed between every two adjacent first wave retaining strips; the second fence wall is arranged on the base and is located behind the first fence wall, the second fence wall comprises a plurality of second wave retaining strips, the second wave retaining strips correspond to the first flow splitting gaps, and a second flow splitting gap is formed between every two adjacent second wave retaining strips; the third fence wall is arranged on the base and is located behind the second fence wall, the third fence wall comprises a plurality of third wave retaining strips, and the third wave retaining strips correspond to the second flow splitting gaps; and the water retaining wall is arranged on the base and is located behind the third fence wall. According to the wave retaining wall, the impact force of water waves can be reduced step by step through the first fence wall, the second fence wall and the third fence wall, and therefore the impact of the water waves on the water retaining wall can be reduced, and the service life of the wall element is prolonged.

The invention relates to a back-swept disc turbine impeller, which comprises a disc, blades and a stirring shaft; the blades are arranged along the circumference of the disc; the The blade is divided into an upper part and a lower part with the horizontal plane where the disc is located; the radial extension line of the blade at the junction of the upper part and the lower part is a curved structure; the curved structure includes an arc, a parabola or an elliptical arc ; The liquid-facing surface of the paddle forms a depression inward, and is swept back along the radial extension line of the paddle. The swept-back disc turbine stirring paddle provided by the invention can reduce stirring power consumption, improve gas-liquid mass transfer performance, and enhance gas-liquid mixing effect, and is widely used in the fields of chemical industry, metallurgy, pharmacy, water treatment and the like.

The invention relates to the technical field of die-casting molds, and provides a die-casting mold for producing shells and a production method for shells, including: a movable mold assembly, a fixed mold assembly, and a slider mechanism, a movable mold assembly, and a fixed mold assembly The product cavity is formed between the parts and the slider mechanism, and also includes: the runner assembly, the runner assembly has a feed sleeve and a splitter cone arranged on the movable mold assembly, the upper surface of the splitter cone and the lower surface of the fixed mold assembly A feed channel connected with the product cavity is formed between the surfaces, the feed sleeve is connected with the feed channel, the thickness of the feed channel is gradually smaller from the splitter cone to the product cavity, and the feed channel is connected with The junction of the product cavity is in a straight line. Compared with the prior art, the present invention has the advantage that the connection between the feed channel and the product cavity is arranged in a straight line, thereby increasing the feeding speed of the shell and the speed at which the gas is discharged from the product cavity, and preventing the setting on the shell Die-casting defects such as lack of material, air holes, and fluffy structure appear in multiple positioning columns.

A rotating brush type blueberry harvester mainly comprises an outer framework, an inner framework, a tree height follow-up regulator, a crown diameter follow-up regulator, a hydraulic motor, a rotating brush assembly, a crown guider, a fruit conveyer, and a fruit collector box; in usage, blueberry plants enter the center of the rotating brush assembly through the crown guider; the hydraulic motor drives a rotating brush mandrel to rotate; elastic brush teeth on the rotating brush mandrel brush the blueberry plants, so the mature blueberry fruit can fall on a conveyer belt of the fruit conveyer, and sent to the fruit connector box, thus realizing fruit contentious and automatic harvesting; the harvester uses the brush mode to contentiously harvest the blueberry, is high in harvesting efficiency, and small in mechanical damage on the fruits; the work parameters of the tree height follow-up regulator and the crown diameter follow-up regulator can be adjusted, so the harvester can suit for blueberry plants of different heights and crown diameters of various kinds; the harvest can also harvest other small berries, and is wide in application scope.