14results about How to "Reduce pitting" patented technology

The invention relates to the field of bevel gear pair friction-flash temperature characteristic calculation, and particularly discloses a bevel gear pair friction-flash temperature characteristic calculation method under real machining surface conditions. Comprising the following steps: calculating oil film shear stress, shear modulus and tooth surface micro-bulge contact shear stress in a helical gear meshing process by adopting a non-Newtonian fluid model and a micro-bulge contact model; summing the shearing stress of the oil film and the shearing stress of the micro-bulge, and performing integration to solve the friction force of the contact domain in the meshing process of the bevel gear and the friction coefficient in the single-tooth meshing period of the bevel gear; coupling oil film shear stress, micro-convex body contact shear stress and relative slippage of two interfaces, and solving heat generated by a tooth surface contact domain in the meshing process through a heat distribution model; substituting the obtained heat into a second kind of Volterra integral equation based on a fast moving heat source model, and calculating the interface flash temperature by adopting an iteration method; and the obtained interface flash temperature is reversely brought back to the non-Newtonian fluid model, and repeated iteration is carried out until convergence.

The invention is suitable for the field of cycloidal speed reducers, and provides an RV speed reducer which comprises a shell assembly, an input assembly and a speed reduction assembly and is characterized in that the shell assembly comprises a front supporting shell, a rear supporting shell, a positioning bolt and a positioning shaft, and the front supporting shell and the rear supporting shell are fixedly installed through the positioning bolt; positioning holes are annularly formed in the supporting front shell and the supporting rear shell, the positioning shaft is installed in the positioning holes in a rolling mode, the speed reduction assembly comprises a speed reduction sealing cover, a planet assembly and a main speed reduction assembly, the speed reduction sealing cover is installed in the supporting front shell through a bearing, and the circle center of the speed reduction sealing cover coincides with the circle center of the supporting front shell; and the kinetic energy transmission efficiency and the maximum running speed are improved, so that the joint is more suitable for high-speed robot speed reduction joints. Pitting corrosion, micro pitting corrosion and eccentric wear of the balance wheel are avoided, and the service life of the speed reduction assembly is prolonged.

The invention relates to the technical field of titanium alloy material surface treatment processes, and particularly discloses a pickling method for a titanium alloy implant material. The pickling method of the titanium alloy implant material comprises the following steps that a pickling solution is prepared, specifically, HF, HNO3 and water are mixed according to the volume ratio of (3-10): (3-10): 120 and stirred to be uniform, and the pickling solution is obtained; and acid pickling is conducted, specifically, the titanium alloy implant material is soaked in an acid pickling solution, timing is started when the titanium alloy implant material is completely soaked in the acid pickling solution, and the acid pickling time is controlled to be 80-150 s. According to the pickling method for the titanium alloy implant material, a flaky oxide layer on the surface of the titanium alloy implant material can be effectively removed, meanwhile, the surface pitting phenomenon is reduced, and the hydrophilicity and corrosion resistance of the titanium alloy implant material are improved.

The invention discloses a sanitary ceramic and a preparation method thereof, and belongs to the technical field of ceramics, the sanitary ceramic comprises a ceramic body and a glaze layer, the glaze layer is prepared from the following raw materials in parts by weight: 30 to 35 parts of feldspar, 23 to 26 parts of quartz, 10 to 15 parts of calcite, 5 to 8 parts of dolomite, 6 to 9 parts of zirconium silicate, 3 to 6 parts of zinc oxide, 2 to 3 parts of aluminum oxide, 1 to 3 parts of frit, 0.5 to 2 parts of modified silicon carbide whisker and 0.05 to 0.1 part of dispersing aid. The preparation method comprises the following steps: 1, preparing a sanitary ceramic green body; step 2, carrying out ball milling on the frit in advance according to parts by weight, then adding the rest raw materials, mixing, adding water, continuously carrying out ball milling, and then removing iron and sieving to obtain glaze slip; step 3, uniformly spraying the glaze slip on a sanitary ceramic green body to obtain a glazed green body; and step 4, performing glaze firing on the glazed green body to obtain the sanitary ceramic which is smooth and glossy in appearance and has good anti-pollution and antibacterial effects.

The present invention relates to the technical field of capacitors, and in particular to an electrolyte for aluminum electrolytic capacitors, an aluminum electrolytic capacitor and a preparation method thereof. The aluminum electrolytic capacitor is composed of an anode aluminum foil, an electrolytic paper, a cathode aluminum foil and an electrolyte; wherein the electrolyte comprises the following raw materials in parts by weight: 60 to 90 parts of a solvent, 1 to 5 parts of a modified polycarboxylic acid, 5 to 20 parts of an organic carboxylic acid ammonium salt, 1 to 4 parts of an inhibitor, 2 to 15 parts of a flash voltage enhancer and 1 to 3 parts of a hydrogen absorber. The present invention also provides a preparation method thereof. Compared with the prior art, the aluminum electrolytic capacitor prepared by the present invention has a higher electrostatic capacitance and good corrosion resistance, and also exhibits excellent low temperature performance.

This invention discloses a conveying mechanism and a glass manufacturing apparatus. The conveying mechanism includes a fixed part and a rotatable support part. The support part is equipped with an air jet point, and an opening and closing assembly is installed between the two. When the support part deforms due to heat and deviates from the fixed part, the opening and closing assembly automatically opens the air jet point, and the airflow generates a reverse lifting force to correct the bending. The fixed part has a hollow structure, with bearings at both ends forming a sealed air chamber. The opening and closing assembly consists of a sealing element and an elastic element, which normally closes the air jet point. The support part has a force-bearing element inside, and the airflow impact can provide rotational driving force. Multiple sets of conveying units are arranged synchronously to form a conveying surface. This invention relies on a purely mechanical adaptive structure to correct the deformation of the high-temperature roller shaft, integrates heat insulation, self-cleaning, and auxiliary drive functions, has a simple structure, and can reduce glass conveying deviation and scratch defects. It is suitable for high-temperature conveying conditions in float glass annealing.

The invention relates to a buffer oxidation etching solution for thinning a quartz wafer. The buffer oxidation etching solution comprises 10%-20% of hydrofluoric acid, 15%-35% of ammonium fluoride, 0.1%-5% of an alcohol compound, 0.1%-2% of organic acid and the balance ultrapure water. The etching solution is used for maintaining a proper etching rate for the quartz wafer, the etched quartz wafer has good morphology and etching roughness, and triangular pyramid structure protrusions existing on the surface of the wafer after conventional BOE etching are improved.

The invention relates to the technical field of capacitors, in particular to an electrolyte for an aluminum electrolytic capacitor, the aluminum electrolytic capacitor and a preparation method of the aluminum electrolytic capacitor. The aluminum electrolytic capacitor is composed of an anode aluminum foil, electrolytic paper, a cathode aluminum foil and an electrolyte. Wherein the electrolyte comprises the following raw materials in parts by weight: 60-90 parts of a solvent, 1-5 parts of modified polycarboxylic acid, 5-20 parts of organic carboxylic acid ammonium salt, 1-4 parts of a stopping agent, 2-15 parts of a sparking voltage boosting agent and 1-3 parts of a hydrogen absorption agent. The invention also provides a preparation method of the composition. Compared with the prior art, the aluminum electrolytic capacitor prepared by the invention has relatively high electrostatic capacity and good corrosion resistance, and also shows excellent low-temperature performance.

The utility model belongs to the technical field of ALC wallboard production and processing, and particularly relates to an ALC wallboard corner cutting device which comprises a machine table and a water jet cutter head which are sequentially arranged from bottom to top, a perforated plate is fixed to the middle of the upper surface of the machine table, two left corner protectors and two right corner protectors which are parallel to each other are arranged above the perforated plate, and the two left corner protectors and the two right corner protectors are each of a zigzag structure. The two left angle beads and the two right angle beads are distributed at intervals in the vertical direction, one left angle bead and one right angle bead are connected to the perforated plate, a plurality of first telescopic rods are fixed between the sides, away from the right angle beads, of the two left angle beads at intervals, and the first telescopic rods are parallel to one another; a plurality of second telescopic rods are fixed between the sides, away from the left corner protector, of the two right corner protectors at intervals and are parallel to one another. The four long edges of the ALC wallboard are sleeved with the four long edges of the ALC wallboard to be cushioned, the ALC wallboard cannot be rubbed when the ALC wallboard is moved to a machining station, and pits generated in the edges after corner cutting of the ALC wallboard can be reduced.

The invention provides colored cover glaze, a dark brick and a preparation method of the dark brick, and relates to the technical field of ceramic decorative bricks. The colored overglaze is prepared by the following steps: carrying out color separation treatment on a target design drawing plate to obtain a gray-scale layer; and adjusting the color of the basic cover glaze according to the gray-scale layer to obtain the colored cover glaze. According to the invention, the pigment is added into the cover glaze, so that the color of the cover glaze is matched with the color system of a product, and the cover glaze with a base color is formed before ink-jet printing, so that the ink outlet amount during ink jet can be effectively reduced, the defects of wiredrawing, splicing positions, color edges and the like possibly generated by an ink jet machine are obviously covered, the ink drying speed is accelerated, and the problems of ink discharge and pits are reduced.

A method for preparing a microtextured electroplated coating of nano-silica capsules loaded with corrosion inhibitors is disclosed. This invention addresses the problems of insufficient corrosion resistance, poor water dispersibility of nano-silica, and poor compatibility between corrosion inhibitor loading and electrodeposition in existing microtextured coatings. The preparation method includes: 1. Hydrophilic modification of hollow nano-silica using an aminosilane coupling agent; 2. Adding a corrosion inhibitor to the hydrophilically modified hollow nano-silica dispersion and stirring to prepare nanocapsules; 3. Preparing a composite electroplating solution; 4. Performing electro-cleaning pretreatment on the substrate; 5. Preparing the composite coating on the substrate using an electroplating process. This invention achieves stable dispersion of nano-silica in an aqueous plating solution through hydrophilic modification, facilitating its entry into microtextured cavities. Utilizing the directional loading and responsive release mechanism of the corrosion inhibitor, long-term protection is achieved, significantly reducing the risk of pitting corrosion and interface failure, exhibiting long-lasting corrosion inhibition performance and self-healing ability.

This invention relates to the field of composite coating technology, specifically to a composite coating for an aluminum-silicon wire submerged roll, its preparation method, and its application. The method involves sequentially depositing CoCrW, CoCrW-Ca2SiO4, Ca2SiO4, and Si-SiC, or sequentially depositing Ca2SiO4 and Si-SiC, on the surface of the submerged roll using atmospheric plasma spraying (APS). Subsequent machining then yields a four-layer CoCrW / CoCrW-Ca2SiO4 / Ca2SiO4 / Si-SiC composite coating or a two-layer Ca2SiO4 / Si-SiC composite coating (hereinafter referred to as the composite coating) with a specified surface roughness. The composite coating prepared by the method described in this invention can withstand temperatures up to 900℃ and possesses excellent wear resistance and aluminum-silicon corrosion resistance, significantly improving the lifespan of the submerged roll.

The utility model provides a kind of straddle type monorail split type driving system, bogie and vehicle, it is related to railway vehicle technical field, straddle type monorail split type driving system is set on the frame of vehicle bogie;Straddle type monorail split type driving system includes driving motor, brake device and gear box;The output shaft of driving motor is connected with the input shaft of gear box;Brake device includes brake clamp and brake disc;Brake disc is located between driving motor and gear box, and is installed on input shaft;Brake clamp is installed on the frame of vehicle bogie.Separate by split type structure, brake disc as intermediate node can absorb part of vibration energy, while the heat dissipation space of motor and gear box does not interfere with each other, effectively reduce the mutual interference of internal vibration and heat of driving system, reduce the crack risk of motor winding insulation layer due to vibration, delay the occurrence of gear tooth surface pitting and gluing phenomenon.

The utility model discloses a starting motor for a high-power motorcycle, which relates to the technical field of motors and comprises a casing, two ends of the casing are sleeved with a front end cover and a rear end cover respectively, the rear end cover and the front end cover are respectively provided with two threaded holes, screws are arranged in the four threaded holes in a threaded manner, and the front end cover and the rear end cover are connected with the casing. A magnetic steel support is fixedly arranged in the machine shell. Through the arrangement of the abutting columns, the connecting shafts, the conical blocks, the wedge-shaped rods, the thermal expansion metal rods and the sleeve rods, the internal heat of the machine shell is judged according to the thermal expansion metal rods so as to adapt to expansion, the number of the abutting columns moving upwards is correspondingly adjusted, and therefore the radial internal clearance reduced by heating expansion of the output shaft is compensated; the output shaft can still keep the optimal radial clearance at the high temperature, vibration is reduced, the running stability is improved, the pitting corrosion and abrasion speed is reduced, and therefore the service life of the output shaft and the service life of the bearing are prolonged.