5 results about "Adhesive wear" patented technology

This application provides a control method for a stick-slip piezoelectric actuator throughout its entire lifecycle, comprising: obtaining a contact force reference value using the equation of the driving characteristic surface; acquiring contact force data from a database; calculating a contact force compensation value and converting it into a compensation voltage for the vertical piezoelectric stack; acquiring step displacement and actual contact force data; obtaining the total wear volume using the Archard adhesive wear model based on the step displacement and voltage data of the vertical piezoelectric stack; proportionally allocating the total wear volume to the slider and driving foot using a wear distribution method based on material hardness; storing the obtained slider wear data, driving foot wear data, and actual contact force data in a contact force database; and predicting contact force data for non-cyclic working ranges based on slider wear data and driving foot wear data within the cyclic working range, and storing this prediction in the database. This method can effectively improve the driving stability of the stick-slip piezoelectric actuator throughout its entire working stroke and lifecycle.

The application discloses a kind of oxidized coal pitch nanocarbon material modified water-related polymer friction pair materials and preparation method, belong to polymer material technical field.The water-related polymer friction pair material of the present application is made of soluble oxidized pitch nanomaterial of formic acid / hydrogen peroxide oxidation system oxidation coal pitch and ultra-high molecular weight polyethylene matrix.The present application utilizes the gap of polymer molecular chain of soluble oxidized pitch nanomaterial of ultra-small structure, and plastic rheology and adhesive wear of material are reduced in friction process by steric hindrance and interface anchoring effect;Combination of the "nanometer reinforcing network" formed by uniform dispersion can effectively transfer friction stress, avoid the matrix cracking caused by local stress concentration;While the nanometer size of soluble oxidized pitch nanomaterial and carbon-based characteristics give it unique dynamic lubrication function, its surface abundant functional groups can form high density, strong adhesion transfer film, significantly improve the wear resistance and service life of composite material.

This application belongs to the field of wear-resistant and anti-corrosion coating technology, specifically relating to a wear-resistant, friction-reducing, and corrosion-resistant coating, its preparation method, and its application. The wear-resistant, friction-reducing, and corrosion-resistant coating of this application comprises a support layer with gradient porosity, a composite functional layer, a metal layer, a chromium nitride layer, and a diamond-like carbon layer, sequentially stacked. The support layer with gradient porosity is in contact with the substrate, and the porosity of the support layer gradually decreases from the contact surface between the support layer and the substrate to the contact surface between the support layer and the composite functional layer. The composite functional layer comprises Cr3C2-NiCr and NiCrSiB. The beneficial effects of this application include: the wear-resistant, friction-reducing, and corrosion-resistant coating of this application can not only prevent common abrasive wear and adhesive wear, but also prevent impact fatigue wear, three-body wear, and electrochemical corrosion, and has a self-lubricating effect that reduces the coefficient of friction, significantly improving the operating performance and service life of this structure.

This invention discloses a method, system, and apparatus for calculating the wear characteristics of a spring-storage seal ring, comprising: S1: establishing a hybrid lubrication numerical model of the spring-storage seal to obtain a hybrid lubrication factor; S2: deforming a simple adhesive wear model based on the hybrid lubrication factor to obtain a wear calculation formula suitable for the spring-storage seal ring; S3: establishing a finite element model of the seal ring and the liquid slip ring based on the wear calculation formula, the geometric parameters and material properties of the spring-storage seal ring; S4: simulating the finite element model and plotting a wear displacement trend diagram; S5: analyzing the failure performance of the seal ring based on the wear displacement trend diagram and evaluation criteria to obtain the wear resistance performance level of the seal ring. This method for calculating the wear characteristics of a spring-storage seal ring achieves a closed-loop analysis from theoretical modeling to simulation verification, overcoming the problem that traditional empirical methods are difficult to accurately predict the wear behavior of seal rings under complex working conditions.

This application provides a compressor and a refrigeration device, relating to the field of compressor technology. The compressor includes: a cylinder with a compression chamber formed within it, and a vane groove on the cylinder; a piston disposed in the compression chamber; a first hinge portion on the outer circumferential surface of the piston; a vane slidably disposed within the vane groove; a second hinge portion at one end of the vane extending into the compression chamber and hinged to the first hinge portion; the second hinge portion having a second contact surface for contacting the first hinge portion, and the first hinge portion having a first contact surface for contacting the second contact surface; wherein the ratio of the hardness of the first contact surface to the hardness of the second contact surface is in the range of 0.28 to 0.63. This suppresses adhesive wear and controls uneven wear damage, thereby transforming the wear mode between the vane and the piston into uniform, slow, benign wear, thus improving the reliability and lifespan of the compressor and improving its operating conditions.