31results about How to "Reduce cleaning losses" patented technology

The invention discloses a longitudinal-axial-flow combine harvester and belongs to the technical field of agricultural machines. The longitudinal-axial-flow combine harvester comprises a harvesting table, a gap bridge device, a threshing separating device, a cleaning device, a grain collecting device and a barn. The threshing separating device comprises a threshing machine body and a longitudinal-axial-flow roller driven by a power device. The longitudinal-axial-flow roller comprises a feeding-in part and a roller body part, and the roller body part sequentially comprises a threshing section, a separating section and a weed-discharging section. A feeding-in shell is arranged on the portion, corresponding to the feeding-in part, of the threshing machine body, a threshing section roller cover is arranged on the upper portion, corresponding to the threshing section, of the threshing machine body, and a threshing section concave plate is arranged on the lower portion, corresponding to the threshing section, of the threshing section roller cover. A separating section roller cover is arranged on the upper portion, corresponding to the separating section, of the threshing machine body, and a separating section concave plate is arranged on the lower portion, corresponding to the separating section, of the threshing machine body. The diameter of the separating section roller cover is larger than that of the threshing section roller cover. The feed quantity is large in harvesting, the function of returning stalks to the field is achieved, working efficiency is improved, kinds of crops are harvested, and the requirements for earnings of a user are met.

The invention belongs to the technical field of metallurgy, and particularly relates to a control method for corner cracks of boron-containing steel plate slabs. The production procedure of a boron-containing steel plate sequentially comprises molten iron pre-treatment, converter smelting, secondary refining and plate slab continuous casting. In the continuous casting process, the ratio of the water amount of a crystallizer to the product of the casting blank section size and the pulling speed is controlled to be 0.02-0.03; meanwhile, the ratio of the wide face water amount / wide face size of the crystallizer to the narrow face water amount / narrow face size is controlled to be 1-1.5; a full-width coverage spraying manner is adopted as a secondary cooling manner, and the ratio of the total water amount of secondary cooling to the product of the casting blank section size and the pulling speed is controlled to be smaller than or equal to 0.0075; and according to the proportion of the water amount of each segment in the total water amount, the foot roller area accounts for 10%-15%, the zero segment area accounts for 35%-45%, the arc-shaped segment area accounts for 25%-35%, and the straightening area accounts for 5%-10%. According to the control method for the corner cracks of the boron-containing steel plate slabs, the straightening temperature rises, the corner cross cracks are eliminated, and the hot-rolled coiled plate edge portion surface warping defect occurrence rate caused by the corner cross cracks of the plate slabs is reduced to 0.2% or below from 3%.

The invention discloses a net-shaped crack control method of high nitrogen and high strength weathering steel continuous casting billet containing vanadium, the method can not only effectively eliminate net-shaped crack of the continuous casting billet, but also can eliminate the continuous casting billet surface longitudinal crack and surface transverse crack defect. The method synthetically applies following technique measures: presetting cooling water amount of the mold wide face to 2485-2515 L / min, the narrow face cooling water amount is set to 304-306 L / min; the casting pulling rate is stabilized in 0.8-1.0 m / min, the billet casing surface temperature of the casting billet out of the mold lower end is increased to 1050-1120 DEG C, the vibration frequency is 110-130 Hz; reducing Cao mixing amount in the casting powder, the alkalinity of the casting powder is 0.95-1.20, the melting point is 1080-1120 DEG C, when at 1300 DEG C, the viscosity is 0.2-0.5 Pa.s; reducing the second cool segment casting billet cooling water amount, and controlling the continuous casting ratio water amount in 0.60-0.65 L / kg by static or dynamic adjusting method.

The invention discloses a transverse crack control method of high nitrogen steel continuous casting plate billet angle containing vanadium, the method can not only effectively eliminate transverse crack defect of the continuous casting billet surface and skin inferior angle, but also can eliminate the continuous casting billet surface longitudinal crack and surface transverse crack defect. The method synthetically applies following technique measures: presetting the mold cooling water amount, the wide face cooling water amount is 3000-30500 L / min, the narrow face cooling water amount is set to 360-365 L / min; improving casting pulling rate, the casting pulling rate is stabilized in 0.8-1.5 m / min, the vibration frequency is 140-210 Hz; after spruing the casting pulling rate, quickly putting casting powder into the mold, the alkalinity of the casting powder is 1.0-1.40, the melting point is 1100-1160 DEG C, when at 1300 DEG C, the viscosity is 0.10-0.40 Pa.s; reducing the second cool segment casting billet cooling water amount, and controlling the continuous casting ratio water amount in 0.55-0.60 L / kg by static or dynamic adjusting method.

Provided is a threshing cylinder of a combined harvester. According to the threshing cylinder of the combined harvester, the threshing strength is selected according to needs. The threshing device comprises a feeding cylinder, amplitude plates, threshing gear lever welding assemblies, an anti-winding disc and a cylinder main shaft, wherein the feeding cylinder is installed at the foremost end of the cylinder main shaft; the cylinder main shaft penetrates through the center of the feeding cylinder; the amplitude plates are located at the front end, the middle end and the rear end of the cylinder main shaft; the cylinder main shaft penetrates through the centers of the amplitude plates. Each threshing gear lever welding assembly comprises threshing gear levers, finger-shaped teeth, cast flat teeth, rethreshing boards and gear lever connection boards. According to the specific mode of the threshing teeth installed on the threshing gear levers, the front section is welded through the cast flat teeth in a sleeved mode and the rear section is formed by welding the finger-shaped teeth on the threshing gear levers in an inserted mode. The adaptability to crops by the threshing cylinder is high, the threshing performance of the crops is improved, and cleaning losses are reduced.

A vibration-type screening sieve with high efficiency and productivity is composed of a sieve frame, a shaker board consisting of three corrugated boards with different corrugated angles, an upper sieve with longitudinally and segmentally combined structure, a middle sieve chosen from braided sieve and punched sieve, a lower sieve which is a scale sieve, a front axle, an active shaft, an eccentrical block and a slide plate.

A cleaning sieve fish scale sieve detection device and method for detecting the opening of the cleaning sieve fish scale sieve, the cleaning sieve fish scale sieve detection device includes: a frame; the detection mechanism includes two linear sliding frames, symmetrical Installed on both sides of the top of the frame and arranged along the length direction of the frame, each linear sliding frame includes a sliding bracket and a sliding plate, the sliding bracket is installed on the frame, the sliding plate is installed on the sliding bracket and along the The sliding bracket moves synchronously; the driving mechanism is connected with the linear sliding frame; the sliding frame is installed on the sliding plate at both ends; the laser displacement sensor is installed on the sliding frame; the elastic flattening mechanism corresponds to the laser displacement sensor Installed on the sliding frame, it is used to eliminate the movement gap in the adjustment process; and the control display mechanism includes a display and a controller, and the controller is respectively connected with the detection mechanism and the display. The invention also provides a detection method of the detection device.

An all-wheel-drive non-amplitude vibrating screen mechanism comprises a vibrating screen and a vibrating system. The vibrating system comprises a pair of front eccentric wheels, a pair of rear eccentric wheels, a pair of front multi-stage connecting rods and a pair of rear multi-stage connecting rods. The front eccentric wheels and the rear eccentric wheels are driven by a transmission mechanism, and are connected with a frame rotatably; the eccentric distance of the front eccentric wheels is large than that of the rear eccentric wheels. The front multi-stage connecting rods are in three-segment connecting rod structure, and the rear multi-stage connecting rods are in two-segment connecting rod structure. According to the all-wheel-drive non-amplitude vibrating screen mechanism, since the front multi-stage connecting rods adopts the three-segment connecting rod structure, the rear multi-stage connecting rods adopts the two-segment connecting rod structure, by means of driving by the eccentric wheels and interactive effect of structures of the vibrating screen and the like, so that the moving track of the front end of the vibrating screen is in a shape of a transverse 8, the moving track of the rear end of the vibrating screen is elliptical, vibrating directions of the entire screen surface are increased, and better screening effect is achieved.

The present invention discloses a straight-curved type casting machine low-alloy steel slab continuous casting full-rolling section narrow face cooling method, and is aimed at solving the problem of that on the casting blank surface corner portion of low-alloy steel the transverse crack can be easily produced. Said invention belongs to the field of metal continuous casting blank cooling and surface quality control technology. Said method is characterized by that in the full-rolling section of continuous casting straight-curved type casting machine slab said invention utilizes the nozzles which are symmetrically mounted at left side and right side of casting blank pouring direction to cool the narrow face of said casting blank, and adopts rectangular nozzles to symmetrically and simultaneously cool the narrow faces of left and right two sides of casting blank. Said invention also discloses a kind of rectangular nozzle for said method, the water outlet hole of its sprayer is a hole with rectangular section. Said invention can reduce casting blank cooling strength of full-rolling section under the crystallizer and can improve casting blank cooling uniformity, so that it can eliminate casting blank surface corner portion transverse crack defect of continuously-cast high-strength low-alloy steel whose steel quality is P510L, P590L, J55 and X52, etc.

The invention belongs to the technical field of agricultural mechanical equipment, and particularly relates to a material distribution adjusting mechanism of a harvester. The material distribution adjusting mechanism is arranged between an arc-shaped concave plate of the harvester and an upper screen mesh at a lower part, comprises a plurality of adjusting plates and an angle adjusting mechanism,wherein the adjusting plates are arranged along an axial direction of the arc-shaped concave plate, the adjusting plates are used for driving each adjusting plate to swing towards two ends of the arc-shaped concave plate around hanging points of the adjusting plates and the arc-shaped concave plate. The material distribution adjusting mechanism has simple and reasonable structure design, simple and convenient operation, can effectively and conveniently adjust material on a surface of a cleaning screen, reduces cleaning loss, and improves working efficiency of the harvester.

The invention discloses a grain cleaning sieve box welded body detection device and method, which are used for detecting a grain cleaning sieve box welded body. The grain cleaning sieve box welded body detection device includes: a frame, the frame It includes a positioning device and a leveling device; a detection component, which includes two slide rail assemblies, each of which includes a stepping motor and at least one laser ranging sensor; and a control display component, The control and display component includes a display device and a controller, and the controller is signal-connected with the detection component and the display device. The invention can detect the size of the welded body of the grain cleaning sieve box quickly and with high precision.