41results about How to "Reduce backflow velocity" patented technology

The invention discloses a motorcycle engine crankcase. The motorcycle engine crankcase comprises a crankcase body, a lubricating oil return opening is formed in the position, close to a cylinder body, of the inner lateral wall of the crankcase body, and a lubricating oil pump oil inlet is formed in the side, close to the cylinder body, of the bottom of the crankcase body. The motorcycle engine crankcase is characterized in that a box body strengthening transverse bar is arranged in the crankcase body and is located below the lubricating oil return opening, the interior of the crankcase body is divided through the box body strengthening transverse bar into upper space and lower space, and an oil via opening is formed in the side, far away form the lubricating oil return opening, of the box body strengthening transverse bar. In the engine running process, the engine oil backflow speed is decreased, heat of the cylinder body and a cylinder head is effectively brought away, and the overall engine performance is improved; as the engine oil backflow speed is decreased, impurities deposited at the bottom of a box body cannot be brought away, abrasion of parts of an engine is reduced, and the reliability of the engine is improved. The lubricating oil pump oil inlet of the box body is optimized, the oil pumping capacity cannot be reduced after the oil level is inclined, the overall engine cooling effect is improved, and the reliability of the engine is further improved.

The invention discloses a pool bottom structure for producing ultra clear glass. The pool bottom structure comprises a feed port part (7) and a clarification part (8); a first step (1), a second step (2), a third step (3) and a fourth step (4) which are sequentially higher are arranged at the right side of the feed port part (7), a bubbling device (5) is arranged in the middle of the second step (2), a furnace ridge (6) is arranged at the right side of the fourth step (4), and the clarification part (8) is arranged at the right side of the furnace ridge (6). The pool bottom structure for producing the ultra clear glass can accelerate discharging of microbubbles and lower the hot spot temperature and has the advantages of accelerating clarification, blocking reflux of clarified and homogenized glass liquid and stabilizing glass liquid flow.

The invention provides an oil cylinder structure of a hydraulic upright conveyer, and belongs to the technical field of conveying equipment. The cylinder structure of the hydraulic upright conveyer comprises a jacket, a top cap, an oil cylinder, a piston rod and an oil return valve, wherein a gas feeding and discharging screw is arranged in the jacket in a screwed manner; the top cap is fixed with the upper end of the jacket; an oil return passage is formed in the top cap; the oil cylinder is arranged in the jacket; an oil cylinder cavity is communicated with the oil return passage; an oil storage cavity is formed between the outer wall of the oil cylinder and the inner wall of the jacket; the piston rod is arranged in the oil cylinder cavity and is matched with the top cap at the upper end of the piston rod; the oil return valve is arranged on the top cap and corresponds to the oil return passage; and a threaded matching hole of the gas feeding and discharging screw in the jacket is communicated with the oil storage cavity. The oil cylinder structure of the hydraulic upright conveyer is characterized by also comprising an oil return pipe which is arranged in the oil storage cavity; and the upper end of the oil return pipe is connected with the top cap at a position corresponding to the oil return passage. The speed of hydraulic oil flowing to the storage cavity from the oil cylinder cavity can be obviously reduced, the loading piston rod can slowly move towards the oil cylinder cavity, and the hydraulic oil in the oil storage cavity can be prevented from spraying outwards from a matching gap between the gas feeding and discharging screw and the threaded matching hole of the gas feeding and discharging screw.

The invention discloses a sand-fixing and wave-breaking hydraulic-filled island-reef revetment made of a basalt fiber. The revetment comprises fixing vertical columns, a solidification layer, porous wave-breaking pipes, a basalt tied rebar grid layer and crisscross water-blocking rods, wherein the porous wave-breaking pipes are vertical hollow pipes; symmetrical wave-breaking holes are formed in the pipe walls of the vertical hollow pipes; and the fixing vertical columns, the solidification layer, the porous wave-breaking pipes and the crisscross water-blocking rods are all formed by pouring cement onto basalt fiber tied rebars and then coating the cement-poured basalt fiber tied rebars with basalt impermeable geotextile. The revetment disclosed by the invention is environmentally friendly, modular in production, light in weight, resistant to corrosion, short in construction period, convenient to construct and strong in anti-wave capability; the revetment is made of a basalt fiber composite, and the basalt fiber is not only relatively high in mechanical property but also strong in corrosion resistance, relatively high in cost performance, long in service life and free of secondary pollution; and therefore, not only is the surrounding ecological environment protected from damage, but also the apposition growth of oysters, corals and other sea creatures is facilitated.