34results about How to "Lower friction temperature" patented technology

The invention discloses a metal repairing agent. Amine curing agent, ammonium sulfate, gum gum, nano silver, polyphenol, low density polyethylene are prepared according to a certain weight. The metal repairing agent prepared by the invention has low production cost, good self-repairing effect and long maintenance time. After the metal repair agent is added to the lubrication system of the mechanical equipment, the lubricating oil (grease) is used as the carrier, and it is transported to the friction and wear surface of the metal parts in the state of no disintegration and non-stop. Under the action of friction energy, The repairing agent and the metal matrix have undergone the processes of ultra-fine grinding, special internal oxidation, deformation structure refinement and strengthening, etc., to form a super-hard and super-smooth nano-crystal protective layer, which automatically repairs friction and wear parts.

The invention belongs to the technical field of metal material machining, and particularly relates to a casting roller design suitable for reducing edge crack of a magnesium alloy cast-rolled plate. For solving the problems of the edge crack and the non-uniform performance caused by cast rolling of the magnesium alloy plate, the invention provides acasting roller shape design capable of effectively inhibiting the edge cracking of themagnesium alloy cast-rolled plate, the design is used for guiding the production of thecast-rolled plate with the thickness of 6-10 mm, an upper roller and a lowerroller are involved and a hole shape is formed through the cooperation of the upper roller and the lower roller, the roller shape of the upper roller is in a dumbbell shape with a groove, the middleof the roller is a cylindrical shape, the two ends of the roller are the cylindrical shapes with the diameter larger than that of the column of the central part, the two ends of the columnin the middle are correspondingly provided with transition arc surface grooves with the depth of H, the lower roller is in the cylindrical shape, the radius of the lower roller is the same as the radius of the columnin the middle of the upper roller, the length of the lower roller is the distance between the two faces of the inner sides of the columns at the two ends of the upper roller, and the transition arc surfaceswith thedepth H which are the same with the roller shape of the upper roller exist at the two ends of the column. In the matching process of the upper roller and the lower roller, thespecialshape rolling hole shape is generated, so that the generation of the edgecrack can be effectively reduced.

The invention provides an oscillating diamond pen dressing grinding wheel device which comprises a driving motor, a transition disc, a support, a diamond pen and a cooling liquid device. The driving motor is provided with a rotary table, the transition disc is installed on the rotary table, the support is installed at the front end of the transition disc, the tail end of the support is also provided with a fixing mechanism, the fixing mechanism is provided with a convex bedplate, the diamond pen is installed on the fixing mechanism, the convex platen is provided with an inclined plane inclinedfrom one end to the other end, the high point of the inclined plane is opposite to the diamond pen, the cooling liquid device comprises a telescopic liquid spraying device, one end of the telescopicliquid spraying device is fixed to the driving motor, the other end of the telescopic liquid spraying device abuts against the inclined plane, and the telescopic liquid spraying device is used for stretching and retracting along with the rotation of the inclined plane so as to spray cooling liquid. The support rotated along with the rotary table and the convex bedplate arranged on the support arerotated to enable the telescopic liquid spraying device to periodically spray cooling liquid, so that the friction temperature between the diamond pen and a grinding wheel in the machining process isreduced, and the deformation degree of the diamond pen is reduced.

The invention relates to a 160km / h express freight car brake pad for preventing thermal cracking of the brake disc and a manufacturing method thereof. The 160km / h express truck brake pads for preventing heat cracking of the brake discs include the following components and weight percentages: boron modified phenolic resin 20%-40%, butyl rubber 10%-18%, reinforcing fiber 6% ‑10%, carbon fiber 10%‑18%, sepiolite fiber 1%‑5%, vermiculite 1%‑8%, fluorite 2%‑8%, magnesium oxide 2%‑9%, clay 2%‑8 %, dispersant 0.2%‑3%. Compared with the prior art, the brake disc of the invention has a lower density, is more convenient to use, and can reduce vehicle quality. The brake pad of the present invention has a microporous structure, and the micropores play the role of heat dissipation, which can effectively reduce the friction temperature, the friction coefficient does not decline at a high temperature of 600°C, and the brake disc has no hot spots and cracks, effectively protecting the couple. The wear of the brake pads is low and the service life is longer than that of similar products.

The invention belongs to the field of solid pumps, and particularly relates to a combined sealing device for a plunger pump for pumping high-viscosity media such as tar residue. The combined sealing device at least comprises a pump cylinder block with a plunger hole, and a plunger part matched with the plunger hole in a splicing manner, wherein the plunger part can reciprocate linearly along the plunger hole; a cavity defined by the front end of the plunger part and a hole wall of the plunger hole forms a pumping cavity for accommodating and squeezing materials; a sealing unit for filling a fit clearance between the plunger part and the plunger hole is sandwiched between a peripheral wall of the plunger part and the hole wall of the plunger hole; the combined sealing device for the plunger pump further comprises a scrape ring for scraping off the viscous materials from the peripheral wall of the plunger part and / or the hole wall of the plunger hole; the scrape ring is embedded into the hole wall of the plunger hole and / or the peripheral wall of the plunger part is sleeved with the scrape ring in a surrounding manner; the scrape ring isolates the sealing unit from the pumping cavity; and the combined sealing device can realize an effect of high-seal conveying of the solid materials in the combined sealing device, and effectively ensure long service lives of sealing parts in the plunger pump simultaneously.

The invention relates to the regulation test of friction temperature which belongs to a method and simultaneously relates to a regulation test and pin sample structure which belongs to the test technology field. The method of the invention comprises the following steps: (1) the pin sample structure is divided into a friction body and a pin body on the back section and the friction body and the pin body are fixed into one integrated structure; (2) the friction body and the pin body are respectively made of materials with different thermal conductivities; (3) temperature measuring holes for placing thermocouples are respectively arranged near to the friction surface of the pin sample in radial direction and axial direction. The combined pin with front and back metal mechanical embedded sections is adopted and the thermal conduction capacity of the front section metal is changed through changing the material of the back section metal to regulate the friction temperature. Temperature measuring points which are distributed in radial direction and axial direction are adopted for measuring temperature simultaneously to monitor the temperature measuring stability of the thermocouples. Realizing the stability for measuring temperature, the regulation test of the friction temperature can obtain reliable friction temperature data, satisfy the requirement for regulating the friction temperature, ensuring the reliability of the regulation test of the friction temperature and is provided with wide application prospect.

The invention belongs to the technical field of bearing pad materials, and discloses a preparation method of an aluminum-tin-copper alloy-based bearing pad material. The material uses endogenous TiB2 particles as a reinforcement, and an aluminum-tin-copper alloy as a matrix alloy; the main element of the matrix alloy is aluminum, and contains tin, copper, zinc, and manganese; the preparation method includes the following steps: (1) melting aluminum ingots, Get aluminum melt, add reactant K TiF6-KBF4 mixed salt, reaction aid Na3AlF6-MgCl Mixed salt, obtain the aluminum melt that contains endogenous TiB2 particle; (2) add aluminum in the aluminum melt that contains endogenous TiB2 particle Copper-zinc-manganese master alloy and tin block to obtain an alloy melt; (3) using NaCl-KCl-CaF2 mixed salt as a refining agent, refining the alloy melt, and pouring it into a mold to obtain the product. The aluminum-tin-copper alloy-based bearing material of the invention has excellent comprehensive performance, low production cost, and is environmentally friendly and pollution-free.

The invention discloses a bearing bush type conductive clutch. The bearing bush type conductive clutch is composed of a sub conductive clutch body and a main conductive clutch body, wherein the sub conductive clutch body comprises fixing bolts, a push-type conductive clutch disc convex column, a sub conductive clutch body flange plate, a reset spring, a spring base and cables; the main conductive clutch body comprises a sucked type conductive contact surface groove, fixing bolt grooves, a base push-type conductive clutch disc convex column mounting hole, electrical wires, a main conductive clutch body flange plate and a base. By means of the effective connection arrangement of all the parts of the sub conductive clutch body and the main conductive clutch body, the problems that the manufacturing cost of the conductive clutch is high, a conductive clutch disc is very hot and is severely burnt in the production process, the service life is short, the later period conductivity declines rapidly, and the smooth running of equipment is affected are solved, the usage range is further widened, and the service life is prolonged.

The invention discloses a powder metallurgical bearing for supporting a motor rotor in a motor, and relates to the technical field of motors. An inner ring is composed of two inner arc-shaped rings, the top ends of the two inner arc-shaped rings are connected and fixed in a clamping mode, the bottom ends of the two inner arc-shaped rings are movably hinged, an outer ring is composed of two outer arc-shaped rings, the top ends of the two outer arc-shaped rings are connected and fixed in a clamping mode, the bottom ends of the two outer arc-shaped rings are movably hinged, and the front face ofthe outer ring is provided with convex ends. According to the powder metallurgical bearing for supporting the motor rotor in the motor, the mode of two-part movable installation is adopted, the bearing is conveniently disassembled, the problem of trouble bearing disassembly is solved, replacement is convenient, later maintenance and preservation are facilitated, the labor intensity is reduced, theaxial preload of the rotor bearing is adjusted by elasticity of the convex ends, the drawback of overweight axial overload is avoided, the badness of axial movement is eliminated, meanwhile the noiseproduced by vibration is reduced, and self-lubrication is realized.