50results about How to "Low coefficient of sliding friction" patented technology

The invention provides a method for lowering the coefficient of friction of the surface of metal bands with a coating, especially of tin-plated or chromium-plated steel bands (S), which are passed through a coating installation at a band speed (v). To be able to lower the coefficient of friction of the surface of the coating even at high band speeds through the coating installation, according to the invention, an aqueous solution of a tenside is sprayed onto the coated metal band passed at the band speed (v) after the coating process. The invention further provides a device for applying a metallic coating onto a steel band, especially in a band tin-plating installation or band chromium-plating installation.

The invention discloses a titanium alloy high-temperature oxidation-resistant fretting-wear-resistant coating material, a coating and a preparation method of the coating. The titanium alloy high-temperature oxidation-resistant fretting-wear-resistant coating material contains hexagonal boron nitride (h-BN), MCrAlYX alloy powder and a binding agent and is composed of 5-30% of hexagonal boron nitride, 0-5% of a binding agent and the balance of MCrAlYX, wherein M is Co, Ni, Fe or alloy thereof, and X is one or combination of more than one of alloy elements such as Ti, Hf, Ta, Nb, Re, Ti and Si. In the preparation method of the coating, high velocity oxy fuel spraying or atmospheric plasma spraying is adopted. The highest use temperature of the coating can reach 1100 DEG C, and the coating can be applied to protection for tenon-mortise structure connecting parts of titanium alloy and high-temperature alloy parts of a fan, a compressor blade, a turbine blade and the like of an aircraft engine, a ground combustion gas turbine and the like.

A graphitic brush which hardly wears irrespective of temperatures used and which copes with the problem of prolongation of life; and a motor having the graphitic brush. In the graphitic brush for feeding a coil wound on a core provided in the rotor of a motor, the graphitic brush consists of a sintered compact having pores in the surface and in the interior, the pores being impregnated with a liquid having a boiling point higher than that of water.

The invention discloses a method for manufacturing polyurethane bridge support. The method mainly includes dewatering polyhydric alcohol, preparing prepolymer, preparing mixture, performing mixing reaction, pouring for formation, demolding, performing post-vulcanization, and bonding. Compared with conventional rubber bridge support, the bridge support manufactured by the inventive method adopts polyurethane material, adopts large adjustable range of the polyurethane material to meet elastic deformation requirement via adjusting hardness, adopts good mechanical property of the polyurethane material to improve fatigue resistance performance, greatly reduces residual deformation quantity and has long service life; in addition, the invention performs product manufacture by adopting pouring formation method to the polyurethane material, the obtained product has stable quality, low contamination, low energy consumption and greatly saved manufacturing cost; and at the same time, the invention adopts polytetrafluoroethylene material or fills polytetrafluoroethylene material to manufacture sliding anti-wear layer, has small sliding friction coefficient, and is in favor of tightly pressing or bearing sliding between the support and box body during bearing force.

The invention discloses a wide-temperature-range large-suction pushing-pulling electromagnet and a manufacturing method thereof. The electromagnet comprises a shell, a rear sealing cover, a movable iron core, a winding framework, a coil and an electric connector socket, the winding framework is positioned in a first groove in the shell and fixedly connected with the shell through the rear sealing cover for sealing, and the coil is wound in a winding groove of the winding framework and enables two poles of the coil to penetrate the shell to be electrically connected with the electric connector socket. One end of the movable iron core is positioned in a magnetic core hole of the winding framework and connected with the rear sealing cover through a resetting spring while the other end of the same penetrates a first through hole in the shell and extends to the outer side of the shell, the shell, the rear sealing cover and the movable iron core are made of electromagnetic pure iron, and the winding framework is made of aluminum bronze. The electromagnet has the advantages of simple structure, small size, large suction and flexibility, and the electromagnet can work stably in an environment with a wide temperature range and rain and other environments. The manufacturing method has the advantages of simple process, convenience in assembly and high working efficiency.

The invention discloses a ring cooling trolley sealing device, belonging to the technical field of metallurgy, comprising an outer guide rail, an inner guide rail and a ring cooling trolley; Sealing components are respectively provided between the guide rails; the sealing components include a sealing frame body fixedly connected with the ring cooling trolley and a sealing ring with a U-shaped cross section; the opening of the sealing ring faces the side of the ring cooling trolley, and it is respectively connected with the inner guide rail. It is connected with the external guide rail; the seal frame body is provided with a radial seal that slides along the radial direction of the seal ring, and the radial seal is slidably engaged with the inside of the seal ring; there is a radial reset between the radial seal and the seal frame body spring. The radial seal is connected with the sealing frame in radial sliding, and is elastically reset by the radial return spring, which offsets the centripetal force of the ring cooling trolley, so that the radial seal is always tightly sealed with the sealing ring to ensure a good sealing effect and running smoothly. Stability, to ensure the cooling quality of hot ore and the effect of waste heat recovery.

The invention relates to a particle-stabilized nanometer emulsion lubricant for water-based drilling fluids, and a preparation method thereof, wherein the particle-stabilized nanometer emulsion lubricant comprises 30-60% of fatty acids and ester derivatives thereof, 5-25% of a nonionic surfactant, 10-20% of a cationic surfactant, 5-20% of a solid lubricant, and 15-40% of water. According to the present invention, the particle-stabilized nanometer emulsion lubricant has good dispersibility in water-based drilling fluids, can overcome the disadvantages of difficult dispersion and easy oil phaseprecipitation of mineral oil or vegetable oil or other conventional liquid lubricants, can form the stable adsorption film on drill bits, drilling rods and well walls, can effectively reduce the friction coefficient of the friction surface, improve the lubrication performance and reduce the wear, and further can maintain good lubrication performance under extreme pressure or high load.

Provided is a sliding type cable drum device. The sliding type cable drum device comprises an oil cylinder, a guide rail under frame, slide frames, L-shaped slide blocks, a drum support frame, a drum and a motor. The guide rail under frame comprises two parallel guide rails arranged horizontally and two parallel crossbeams. The guide rails are connected with the crossbeams perpendicularly. The oil cylinder is arranged parallel to the guide rails and connected with the crossbeams to push the slide frames to move along the guide rails. The two slide frames parallel to the crossbeams in the longitudinal direction are arranged on the guide rails and can move on the guide rails through the L-shaped slide blocks matched with the slide frames. The drum support frame and the drum are arranged on the slide frames. The motor is used for driving the drum to rotate. According to the sliding type cable drum device, the oil cylinder pushes the cable drum device to move, so that the defect of vehicle unbalanced loading is overcome. In addition, the sliding type cable drum device is scientific and reasonable in whole structure, convenient to install and operate, capable of effectively preventing safety accidents from occurring, easy to use, popularize and promote, and widely applicable to being used in cooperation with various cable drums.