The load distribution analysis plays a significant role in the performance evaluation of cycloid speed reducer. However, current analytical models usually ignore elastic deformation, clearances, or assembly errors. These factors must be considered for realistic This paper proposes an model reducer based on unloaded tooth contact and analyses. proposed can predict loads various components presence clearances eccentricity results are compared with those predicted by theoretical geometry....

UV-sensitive lateral all-two-dimensional (2D) photodetecting devices are produced by growing the large band gap layered GaS between graphene electrode pairs directly using chemical vapor deposition methods. The use of prepatterned on Si wafer enables more than 200 to be fabricated simultaneously. We show that surface chemistry substrate during leads selective growth in gaps, forming heterostructures, rather graphene. graphene/GaS/graphene demonstrated sensitive UV light only, with no...

Abstract Membrane separation technologies, with a broad application prospect in the field of hydrogen separation, are characterized by simplicity devices, high energy efficiency and environmental friendliness. The performance membranes is primary factor that determines separation. Therefore, development always research focus. This paper presents reviews developments features organic membranes, inorganic hybrid matrix for separations. First, characterization methods key index parameters...

Due to their advantages of compact size, high reduction ratio, large stiffness and load capacity, RV reducers have been widely used in industrial robots. The dynamic characteristics terms vibratory response transmission error a significant influence on positioning accuracy service life. However, the current studies are not extensive require deeper study. To bridge this gap, more effective realistic lumped parameter model for is developed, considering tooth profile modification cycloid gears...

Abstract For the submerged high-pressure liquid hydrogen pump, a core piece of equipment transportation, extensive analysis and research were conducted on its components structure during development process. By referencing typical failure probabilities in energy industry statistical data from prototype pump testing, list for each part was compiled, consequences those failures deduced. The nitrogen test experiment verified possibility seal identified fault modes. It confirmed that piston rod...

Abstract Nanoimprinting is a high-throughput, low-cost, and high-precision nanofabrication technology. In this article, we proposed method for fabricating PDMS nano-molds by side etching deposition casting. During the fabrication process, used wet to obtain width, nanogap was formed when process completed, finally, nanochannel obtained lift-off method. Then, casting replicate pattern create polydimethylsiloxane (PDMS) nano-mold. The effect of development time on morphology photoresist...

The passivation of detrimental perovskite‐based defects is critically acknowledged for fabricating highly effective perovskite solar cells (PSCs). presence a high‐quality electron transport layer (ETL) also considered pivotal factor charge extraction and dynamics. Herein, simple small organic molecule, aminomethyl phosphonic acid (AMPA), introduced as multifunctional additive in the SnO2 ETL. ETL are effectively suppressed by passivating oxygen vacancies upon surface. Simultaneously, carrier...

The passivation of detrimental perovskite‐based defects is critically acknowledged for fabricating highly effective perovskite solar cells (PSCs). presence a high‐quality electron transport layer (ETL) also considered pivotal factor charge extraction and dynamics. Herein, simple small organic molecule, aminomethyl phosphonic acid (AMPA), introduced as multifunctional additive in the SnO2 ETL. ETL are effectively suppressed by passivating oxygen vacancies upon surface. Simultaneously, carrier...

The current loaded tooth contact analysis of cycloid drives based on the assumption theoretical positions ring pins ignores deviations caused by manufacturing errors and elastic deformations, which are not in agreement with reality. To fill this gap, an improved load distribution model mismatched cycloid-pin gear pair pin position is presented for a component-level analysis. Firstly, profile geometry defined, unloaded applied as pre-processor to determine potential points, backlash, rotation...

Poly(bis(2-ethylhexyl) phosphoric) methacrylic anhydride-grafted carbon dots (CD-g-PEPMA) have been controllably synthesized and used as multifunctional lubricant additives of poly(ethylene glycol) (PEG200). The polymers on the surfaces CD-g-PEPMA not only endow them with particularly excellent dispersion stability but also enhance their adsorbability steel surface embedded between rubbing surfaces. Hence, an additive showed outstanding rust resistance tribological performance. Among...

This article proposes a new method for optimizing tooth profile modification amounts of cycloidal reducers. By transmission error and ratio fluctuation, the objective optimization function is determined, influence optimized amount on various performances studied. In addition, this also conducted mechanical analysis reducer obtained results contact force. The mathematical model was established, variation law force distribution between internal external gears calculated. indicate that needle...

The Hazelett continuous casting and rolling process represents a leading-edge production method for cold-rolled aluminum sheet strip billets in the world. Its solidification microstructure significantly influences quality of produced cold sheets strips. In this study, employing CAFE (Cellular Automaton—Finite Element) method, we developed coupled computational model to simulate process. We investigated impact nucleation parameters, temperature, speed on microstructural evolution billet....

Cycloid drives are widely used in various mechanical systems due to their high reduction ratio, compact size, and efficiency. Tooth surface wear is a major problem that affects the reliability durability of cycloid drives. However, compared research on involute gears, prediction tooth relatively limited less extensive. To fill this gap, theoretical model cycloid-pin gear pairs proposed based Hertz contact theory Archard’s formula, with consideration profile modifications. Firstly, loaded...