579 results about "Contact friction" patented technology

The invention discloses a cable installation protection device and a cable installation method, relates to the technical field of cable installation and laying, and solves the problems that a cable is in direct contact friction with a wellhead of a cable well, a cable sheath is possibly abraded in the friction process, the insulating property of the surface of the cable is reduced, and the service life of the cable is affected. Comprising a mounting frame, a guide wheel is rotatably mounted on the mounting frame, a first hollow pipe is mounted on the left side of the mounting frame, the first hollow pipe is fixedly connected with the mounting frame, the outer side of the first hollow pipe is movably sleeved with a second hollow pipe, and a plurality of limiting blocks are fixedly mounted on the outer side of the first hollow pipe; by installing the guide wheel, the limiting assembly, the guide wheel, the first half wheel, the second half wheel and the second roller to conduct the cable, in the cable laying process, the contact friction between the cable skin and the cable well mouth and the cable well side wall can be avoided, and the situation that the cable is directly rubbed with the cable well, and consequently the skin of the cable is abraded is prevented.

The invention relates to the field of electro connecting pressure gauges, in particular to an electro connecting pressure gauge with an alarm function, which comprises an external pipeline connected with an external pressure pipeline, the outer end face of the external pipeline is fixedly connected with a dial plate, and a transparent shield is embedded and matched on the dial plate; the pointer adjusting mechanism is used for adjusting the position of the pointer, and the pointer adjusting mechanism is arranged in the center of the transparent shield; the pointer mechanism is used for carrying out alarm processing when an upper limit is exceeded or a lower limit is lower, and the pointer mechanism is arranged on the dial plate and is protected by the transparent protective cover; wherein the pointer adjusting mechanism comprises a circular groove, the circular groove is formed in the top of the transparent protective cover, and according to the electric contact pressure gauge with the alarm function, a friction damper (such as metal sheet contact friction) is arranged on a reset path, vibration energy is consumed through friction, and impact and residual vibration of the second bourdon tube in the reset process are reduced.

The invention discloses an air floatation lifting rotating platform, and belongs to the technical field of precise instruments, the platform comprises a base, a slide block and an objective table, the slide block maintains a suspension state in the base through gas power and can respond to an external load in the vertical direction to carry out position adjustment, and the objective table and the slide block are in isolated contact through a gas film. The objective table can rotate in a plane parallel to the surface of the sliding block, the sliding block comprises a shell, a thrust bearing is arranged on the upper portion of the shell, a radial bearing is arranged on the inner side of the thrust bearing, the objective table is in clearance fit with the upper surface and the lower surface of the thrust bearing to form a cavity, and the objective table is in clearance fit with the inner side of the radial bearing to form a cavity. The thrust bearing is provided with an air path for releasing high-pressure air to the cavity, and the objective table is connected with a motor. According to the invention, the contact friction is reduced, the lifting precision and the rotating precision are improved, and the wafer detection alignment efficiency is improved.

The invention belongs to the technical field of aircraft manufacturing, and discloses a pressure-adjustable flexible blank pressing loading deep drawing die and a using method thereof.The deep drawing die comprises a female die, a blank pressing ring and a male die, the molded surface of the female die is partially matched with the outer surface of a part, and the upper surface of the blank pressing ring is provided with a sunken surface matched with an unfolded blank in shape; the working surface of the male die is matched with the lower surface of the inner side area of the root fillet of the part; the pressure-adjustable fluid medium is tightly pressed on the upper surface of the unfolded blank in a sealed mode through the female die and the blank holder, and part drawing forming is carried out on the male die. And the technical problem of mutual contradiction of edge pressing load concentration during traditional deep drawing load increase is solved. A fluid medium flexible edge pressing mode is adopted, contact friction does not exist between the female die and the flange edge of the part, and the edge pressing load uniformity is not affected when the die bears deformation; the lubricating device has the remarkable advantages of good lubricating effect, low mold processing cost, high technical universality and the like.

The invention discloses a capacitance method measuring device and method for the thickness of a lubricating oil film between mechanical friction pairs based on a dynamic correction model, and belongs to the technical field of electrical measurement. Wherein the point contact ball disc testing machine comprises a point contact friction pair formed by a conductive disc and a steel ball; the conductive disc is electrically isolated by arranging insulating rubber pads on the upper surface and the lower surface of the conductive disc, and the steel ball is electrically isolated by arranging an insulating ceramic ball bearing in a transmission mechanism where the servo motor is connected with the steel ball. The two independent servo motors respectively drive the steel ball and the conductive disc to rotate, so that test working conditions at different speeds can be realized. According to the invention, the capacitance distribution in the Hertz contact area can be effectively calculated, the problem of measurement errors caused by peripheral capacitance interference of the Hertz contact area in a traditional capacitance method is solved, and accurate measurement of the oil film thickness between common metal friction pairs in engineering is realized.

The invention discloses an in-situ observation sliding electric contact frictional wear test bed and a test method. A load assembly, an observation assembly and a transposition assembly of the test bed are fixedly mounted on an air floating type vibration isolation platform; the load assembly is used for realizing stable loading of a force load and an electric load during a frictional wear test and realizing adjustment of the height position of the sample during frictional wear observation; the observation assembly is used for measuring and recording the surface morphology of the contact area of the friction pair; the transposition assembly is used for rotating the friction disc to a position where the friction disc rubs with a sample during a friction wear test, and rotating the sapphire disc to an observation position during friction wear observation; the control unit is used for controlling the load assembly, the observation assembly and the transposition assembly. The test bed can perform in-situ observation on the morphology and the abrasion evolution process of the contact area, and the change rule of physical quantities such as the actual contact area and the abrasion loss of the friction pair along with time is obtained.

The utility model discloses a door and window hovering supporting component which comprises a base, four coil spring pieces which are movably connected in a sleeved mode through rotating shafts are arranged on the surface of the base at equal intervals, and two positioning blocks which are used for preventing coil spring pieces on the coil spring pieces from being clamped and positioning the coil spring pieces on the upper end face of the base are symmetrically arranged between the coil spring pieces. When the movable window frame is used for pulling the coil spring pieces in the coil spring pieces to change the angle and position hovering of the movable window frame, the coil spring pieces in the four coil spring pieces are pulled out in a concentrated mode through the arc-shaped faces in the positioning blocks, and the coil spring pieces make contact with balls in the arc-shaped faces while being pulled out; therefore, the phenomenon that the coil spring pieces are clamped due to contact friction between the coil spring pieces and the arc-shaped surfaces in the positioning blocks due to inertia expansion, diameter increase and diameter increase generated when the coil spring pieces are pulled out and rolled up is avoided, the movable window frame can be suspended more smoothly and freely through the movably connected fixing blocks, and the window can be opened and closed more stably by increasing the number and the weight of the coil spring pieces.

The present invention relates to the field of exploration and sampling technology, specifically to a mineral resource exploration and sampling device, including a frame, wherein a sampling component is provided inside the frame for rotation, and the sampling component includes two arc-shaped sampling tubes, and the two arc-shaped sampling tubes are both arranged in a semi-cylindrical shape. The two arc-shaped sampling tubes are separated, so that the inner wall thereof is separated from the outer wall of the sampled rock core, and the rock core falls off from the bottom of the two arc-shaped sampling tubes, which is convenient for detection personnel to sample the rock core, and improves the convenience of use, and the connecting action of the torsion bar will stretch the two elastic bandages and the friction strip, and the two elastic bandages are stretched to gradually reduce the arc, and the two friction strips are contracted toward the middle, so as to abut against the outer wall of the rock core, and due to the contact friction between the two friction strips and the outer wall of the rock core, the speed of the rock core falling is slowed down, and it is ensured that the rock core will not be broken due to the impact, so as to better survey the distribution of mineral texture.

The invention provides a winding anti-loosening and unfolding orienting device for a flexible stretching rod and a using method thereof.The winding anti-loosening and unfolding orienting device comprises wedge blocks, wedge block seats, a winding cylinder, the flexible stretching rod, an adapter shaft, a connecting rod and a guide wheel, the multiple wedge block seats are symmetrically arranged on the two sides of the winding cylinder, and the flexible stretching rod is arranged on the winding cylinder from inside to outside in a winding mode; a plurality of wedge blocks are symmetrically installed on the two sides of the flexible stretching rod, and the wedge blocks on the wound flexible stretching rod are stacked layer by layer and locked on the wedge block base to form a wedge block set. The wedge blocks and the wedge block bases are interlocked in the tangential direction and the transverse direction, the tangential displacement and the transverse displacement between the rings are limited, and disordered expansion and scattering of the flexible stretching rods under the action of the elastic energy of the flexible stretching rods and mutual contact friction of flexible stretching rod bodies between the rings are prevented; orderly fixation of folding and winding and orientation of unfolding of the flexible stretching rod are ensured; the structure is simple and reliable, the additional mass is small, and the usability and reliability of the flexible stretching rod serving as a stretching mechanism are improved.

The utility model discloses a double-layer drill rod structure of a drill rod, which relates to the technical field of drill rods and comprises a first drill rod, a female end connector is arranged at the top end of the first drill rod, a male end connector is arranged at the bottom end of the first drill rod, a distance adjusting mechanism is arranged in the first drill rod, and the distance adjusting mechanism is used for adjusting the unfolding distance of a second drill rod. A limiting mechanism is arranged on the outer side of the second drill rod, the friction force of the second drill rod is increased through internal parts of the first drill rod, and meanwhile the outer end of the second drill rod is prevented from directly shaking and rubbing with the inner end of the first drill rod. An operator can pull the limiting ring, adjust the position of the limiting ring and position and limit the outer side of the second drill rod, the overall length of the double-layer grouting drill rod can be freely adjusted according to needs, and therefore use flexibility is improved, friction force of the drill rod in the displacement process is increased through the sealing ring pad, and the service life of the drill rod is prolonged. And direct contact friction between the first drill rod and the second drill rod is avoided.

The invention discloses a polishing device and a polishing method for a blue glass optical filter, and relates to the field of polishing equipment. The upper polishing disc and the lower polishing disc are used for polishing the upper face and the lower face of a workpiece at the same time, the two faces of the workpiece can be polished at the same time, the polishing efficiency of the workpiece can be improved, the workpiece is positioned through the positioning grooves in the jig disc, and the situation that the workpiece moves disorderly under the friction force effect during polishing is prevented; during polishing, the jig disc can be driven by the planetary driving unit to drive the workpiece to do circular motion and self-rotate, it can be ensured that the two faces of the workpiece are evenly stressed, excessive abrasion of the single face of the workpiece is avoided, and therefore the polishing effect of the workpiece is further improved; during polishing, the lifting frame drives the jig disc to move upwards, so that the bottom surface of the jig disc is separated from the top surface of the lower polishing disc, abrasion of the jig disc and the lower polishing disc caused by continuous contact friction between the bottom surface of the jig disc and the lower polishing disc during polishing is prevented, and the service life of the jig disc and the service life of the lower polishing disc are prolonged.

The invention relates to the technical field of petroleum equipment, and particularly discloses an oil and gas well spherical milling head and a using method thereof.The oil and gas well spherical milling head comprises a milling head body, and the outer side surface of the milling head body is fixedly connected with first milling blocks distributed in an annular array; the upper surface of the milling head body is fixedly connected with a mounting block which is coaxially arranged; the mounting block is provided with a supporting and moving mechanism which is elastically supported towards two sides, free ends of two sides of the supporting and moving mechanism are provided with first sliding balls which are in rolling contact with a well wall, the mounting block is provided with pneumatic supporting mechanisms which are distributed towards the outer side in a divergent shape, and the free ends of the pneumatic supporting mechanisms are provided with second grinding and milling blocks. The radial grinding and milling block can be pneumatically supported and adjusted according to the construction pipe diameter, so that the radial grinding and milling block is suitable for construction of various pipe diameters, the application range is wide, the contact friction between the radial grinding and milling block and the well wall when the radial grinding and milling block moves in the well is reduced in an elastic supporting and righting mode, and the radial grinding and milling block has the advantage of protecting the well wall.

A selectively frictionally engaged hole cover for a bore hole cored from a paved surface that includes a cover plate configured to cover the bore hole and support vehicular traffic. An engagement mechanism is attached to the cover plate and extends down into the bore hole. The engagement mechanism is configured to be actuated by a user torque input that causes an engagement plate selectively shiftable relative to the cover plate to thereby shift an engagement member along a engagement member stop and thus radially outwardly or inwardly, causing the engagement mechanism to selectively engage or disengage the wall of the bore hole. When the engagement member is in frictional contact with the hole, unintentional extraction of the engagement mechanism is prevented. The selectively frictionally engaged hole cover effectively provides a temporary cover for a bore hole in a road, parking lot, or other paved surface.

The utility model discloses a delivery device for vascular intervention consumables and a vascular intervention surgical robot, and the delivery device comprises a driving roller, a driven roller and a driving assembly, wherein the driving assembly is in transmission connection with the driving roller and used for driving the driving roller to rotate; the driving roller and the driven roller are oppositely arranged, the rim of the driving roller and the rim of the driven roller are both provided with grooves used for clamping the vascular intervention consumables, each groove at least comprises two oppositely distributed contact surfaces, and the contact surfaces are used for abutting against the surfaces of the vascular intervention consumables. The purpose that at least two contact lines are formed between the driving roller and the vascular intervention consumable and between the driven roller and the vascular intervention consumable after the driving roller and the driven roller clamp the vascular intervention consumable is achieved, and therefore when the vascular intervention consumable is clamped and driven, the contact friction force of the rollers to the vascular intervention consumable is increased; and the risk of slipping in the delivery process is reduced.

The invention discloses a friction in-situ self-sensing method and a friction in-situ self-sensing device for a magnetic-sensitive rubber polymer, relates to the field of rubber friction sensing detection, and comprises a magnetic-sensitive rubber polymer friction self-sensing principle, a self-sensing array design technology and a three-dimensional force detection principle. The device comprises a loading driving module, an electromagnetic regulation and control module and an acquisition control module. The device has the capability of autonomously sensing interface contact friction and the characteristic of autonomously regulating and controlling friction by a magnetic field, normal stress and shear stress in the magnetic-sensitive rubber and the accurate position of a stress point can be detected in real time through the flexible array sensor in the magnetic-sensitive rubber, and then a beam-spring model is established to deduce a stress-friction force relationship; and calculating the magnitude and direction of the surface friction force of the magnetic-sensitive rubber so as to realize in-situ self-sensing of the interface friction of the magnetic-sensitive rubber. The method and the device are effectively combined with a computer system, friction force can be directly measured and regulated without the help of an external sensor, the structure is simple, and the method and the device have wide prospects in the field of rubber friction.

A random orbital sanding tool includes a power motor, a driving spindle connected to the power motor, an eccentric block connected to the driving spindle, a tool holder disposed on the eccentric block, and a sanding pad connected to the tool holder and indirectly driven by the power motor. The random orbital sanding tool includes a friction ring disposed on the tool holder, the friction ring contacts a surface of the eccentric block facing the sanding pad, the friction ring stops rotation of the tool holder and the sanding pad by a friction force exerting on the surface of the eccentric block when the power motor stops operation, the friction ring includes a base part protruding into a gap between the tool holder and the eccentric block, a sleeve part diverged and extended from the base part.

The invention provides a cable dragging anti-friction device for power construction, and belongs to the technical field of cable protection devices.The cable dragging anti-friction device comprises a supporting frame, a rotating roller is arranged on the supporting frame, a drawing frame is slidably installed on the supporting frame, a supporting plate is arranged on the drawing frame, two arc-shaped limiting grooves are formed in the supporting plate, and a corner auxiliary part is installed on the supporting plate; the corner auxiliary part comprises four first U-shaped supporting plates, two of the four first U-shaped supporting plates are fixedly installed on the supporting plate, the other two of the four first U-shaped supporting plates are slidably arranged in the two arc-shaped limiting grooves correspondingly, and rotating rollers and inclined rollers are installed on the first U-shaped supporting plates correspondingly. A cable can be supported and limited through the rotating rollers and the inclined rollers, contact friction between the cable and a building or other objects is prevented, an operator can prolong or shorten the overall length of the supporting frame according to actual needs through the design of the drawing frame so that the supporting frame can adapt to cables of different lengths, and the practicability of the device is improved.

The utility model discloses an anti-scraping logistics appliance for a fender in the technical field of packaging boxes, and aims to solve the technical problems that in the prior art, the fender is easy to deform due to uneven stress in the packaging, storing and transporting processes, a bright paint surface is easy to generate scratches due to contact friction with a packaging box, oil coating lubrication is uneven, and pollution is generated. The anti-scraping logistics appliance comprises at least two appliance bodies distributed in the longitudinal direction, supporting assemblies matched with the back face of a fender body of the fender are arranged on the top faces of the appliance bodies, and the bottom faces of the appliance bodies are concaved inwards to form containing grooves matched with the front face of the fender body.

The invention discloses a near-net forming friction welding method for a dissimilar metal stud based on a middle layer, which comprises the following steps of: pre-processing a similar T-shaped boss with a thread or a circular truncated cone-shaped boss without a thread section on the end surface of a workpiece with high hardness, and pre-processing a corresponding similar T-shaped groove or a circular truncated cone-shaped groove on the end surface of a workpiece with low hardness; and before welding, middle-layer alloy is placed at the upper end and the bottom of the T-like groove or the bottom of the circular-truncated-cone-shaped groove, and the welding steps comprise rotary pressing, rotary pressing and friction, sudden stop and upsetting. The intermediate layer alloy is used as a medium, direct contact friction of a welded workpiece is avoided, surface oxidation films of adjacent base metal are broken and gaps are filled through severe plastic deformation of the intermediate layer under rotary extrusion of the workpiece, and effective welding under the conditions of low upsetting friction pressure and no obvious deformation of the workpiece is achieved. And a dissimilar metal welding interface is prevented from being overheated to generate an overthick intermetallic compound, subsequent machining is omitted, near-net forming of a friction welding joint is achieved, and the production efficiency is improved.

The invention relates to the field of foundation detection, in particular to an impact-controllable foundation strength detection device and method for building construction, and the device comprises a steel chisel main body, an annular transmission block, a piercing hammer and a coaxial release mechanism; the coaxial releasing mechanism comprises a coaxial connecting ring, a plurality of force applying structures and a buffering assembly, the coaxial connecting ring is coaxially connected with the steel chisel body, a plurality of lifting lugs are arranged on the coaxial connecting ring at equal intervals, the force applying structures are arranged on the lifting lugs correspondingly, the force applying structures are used for applying radial acting force to the piercing hammer, and the buffering assembly is used for buffering the piercing hammer. The acting force applied to the piercing hammer by the force application structures is the same in magnitude, and the buffer assembly is connected with the coaxial connecting ring and the steel chisel body and used for reducing vibration borne by the coaxial connecting ring. The steel chisel is provided with the steel chisel body, the piercing hammer and the coaxial release mechanism, so that energy loss caused by eccentricity or contact friction of the piercing hammer is avoided, and the impact amount of the piercing hammer is precisely controllable.

The utility model belongs to the technical field of welding robots, and particularly relates to a welding robot moving track which comprises a base, a first telescopic rod is fixedly connected to the left side of the upper end of the base, a lug plate is fixedly connected to the right side of the first telescopic rod, and a sliding plate is fixedly connected to the upper end of the lug plate. The lower end of the sliding block is in rolling connection with the balls, the balls support the sliding block to prevent the lower end of the sliding block from generating surface contact friction with the upper end of the base, the balls are in rolling connection with the interior of the arc-shaped groove, and therefore surface friction sliding between the sliding block and the base is converted into rolling contact sliding, and the contact area of the friction position is reduced; friction resistance is reduced, sliding of the workbench is facilitated, the contact face is protected, the lower end of the workbench is connected through a motor shaft, the workbench is conveniently driven to rotate, and therefore a robot at the upper end of the workbench is conveniently driven to rotate, and welding work can be conveniently conducted on different positions of the robot at one position.

To provide a vibration type actuator capable of improving wear resistance and being stably driven in a vacuum environment such as cosmic space and a vacuum device.SOLUTION: A vibration type actuator includes: a vibrating body having a rectangular elastic body and an electromechanical energy conversion element; and a contact body in contact with the elastic body, and is configured such that the contact body and the vibrating body relatively move by vibration of the vibrating body. With the elastic body, a flat plate portion and a protruding portion having a top portion and a wall portion are integrally formed, and both ends or the entire circumference of the top portion is supported by the wall portion. A friction material different from the elastic body is provided on the top portion so as to come into contact with the contact body. The friction material is a sphere or a cylinder. The friction material is supported with respect to a slope formed on the top portion.SELECTED DRAWING: Figure 3

A method for improving the casting time of thin strip continuous casting and a side sealing device thereof, comprising: 1) side sealing plates which can move upward or downward in one direction or in two directions are arranged on the end faces of both sides of a crystallization roller; when the side sealing plates move upward, the length of the side sealing plates is greater than twice the distance between the upper and lower intersection points where the upper and lower sides of the side sealing plates contact the arc surface of the crystallization roller; when the side sealing plates move downward, the length of the side sealing plates is greater than twice the distance between the upper intersection point formed by the contact between one side edge of the side sealing plate and the upper part of the arc surface of the crystallization roller and the lower intersection point formed by the contact between the extension line of the side edge and the lower part of the arc surface of the crystallization roller; 2) the side sealing plates which are closely attached to the end faces of the crystallization roller as the crystallization roller rotates contact and rub against the end faces of the crystallization roller to form a groove on the inner side face thereof, when the displacement amount L of the side sealing plates is greater than or equal to (1 / 10 to 1 / 2) d, d is the thickness of the side sealing plates, in mm, and L is in mm; the side sealing plates are moved outward along the axis of the crystallization roller to make the end faces of the crystallization roller separate from the groove on the surface of the side sealing plates; and then the side sealing plates are moved upward or downward until the groove on the side sealing plates completely separates from the end faces of the crystallization roller.

The utility model discloses a conveying device for lead frame processing, which belongs to the technical field of lead frame processing and comprises a conveying frame, a plurality of rotating shafts are rotatably arranged in the conveying frame, a protective shell is arranged on the outer side of the conveying frame, one end of each rotating shaft penetrates into the protective shell and is sleeved with a chain wheel, and the other end of each rotating shaft is sleeved with a chain wheel. The multiple chain wheels are in transmission connection through a chain, the outer sides of the multiple rotating shafts are symmetrically sleeved with rolling wheels, the rolling wheels are fixedly connected with the rotating shafts through bolts, bosses used for bearing the lead frame are arranged on the inner sides of the rolling wheels, and an adjusting assembly used for adjusting the installation distance between the rolling wheels on the rotating shafts is arranged in the conveying frame. The lead frame conveying device has the advantages that the lead frame is placed on the boss to be conveyed by arranging the rotating shaft, the idler wheel and the boss, a silver plating area of a product is in a suspended state and does not make contact with the boss and the rotating roller, contact friction of the silver plating area is avoided, and the percent of pass of the product is further improved.

A selectively frictionally engaged hole cover for a bore hole cored from a paved surface that includes a cover plate configured to cover the bore hole and support vehicular traffic. An engagement mechanism is attached to the cover plate and extends down into the bore hole. The engagement mechanism is configured to be actuated by a user torque input that causes an engagement plate selectively shiftable relative to the cover plate to thereby shift an engagement member along a sloped wall and thus radially outwardly or inwardly, causing the engagement mechanism to selectively engage or disengage the wall of the bore hole. When the engagement member is in frictional contact with the hole, unintentional extraction of the engagement mechanism is prevented. The selectively frictionally engaged hole cover effectively provides a temporary cover for a bore hole in a road, parking lot, or other paved surface.

The utility model relates to a high-stability security lifting guide rail suitable for multiple scenes, which aims to solve the technical problems of larger friction force and larger loss caused by larger contact surface when the current lifting guide rail is connected with a corresponding moving mechanism, and comprises a track, a connecting plate and an L-shaped plate, the two rails are symmetrically connected through a cross beam; the connecting plate is arranged between the two rails; wherein guide wheels are arranged at the two ends of the connecting plate respectively, and the guide wheels are in rolling fit with the rails; the rear end of the top of the longitudinal section of the L-shaped plate is fixedly connected with the connecting plate; wherein the rear end of the longitudinal section of the L-shaped plate is provided with a hydraulic cylinder body, the hydraulic cylinder body is connected with a hydraulic press body, and the outer end of a piston rod of the hydraulic cylinder body is fixedly connected with the connecting plate. Therefore, the loss is reduced.

The utility model belongs to the technical field of chimneys, and particularly relates to a self-standing steel chimney damper which comprises symmetrically-arranged fixing rings, a winding shaft is rotationally connected between the fixing rings at the top end, the fixing rings at the lower portion are fixedly connected through a sliding rod, the two fixing rings are fixedly connected through a friction plate, and the friction plate is fixedly connected with the winding shaft. A shell is slidably connected to the outer surfaces of the friction plate and the sliding rod, a friction block is slidably connected into the shell and makes contact with the friction plate, a traction rope is fixedly installed at the top end of the friction block, the traction rope penetrates through the shell and extends to the outer side of the shell, and the end, away from the friction block, of the traction rope is wound and fixed to the outer surface of the winding shaft. According to the self-standing steel chimney damper, the pulling rope is arranged to pull the friction block and increase the pressure between the friction block and the friction plate, so that the friction force between the friction block and the friction plate can be increased, the damping force can be increased, and the damping can be changed through the arrangement.

The utility model relates to an aluminum disc flywheel ring assembly for a steel cord double-twisting machine, which comprises two aluminum discs and a flywheel ring, only one flywheel ring is arranged between the two aluminum discs; a mounting groove is formed at the mounting bulge on the aluminum disc, and the mounting groove is matched with the flywheel ring in size; the mounting groove is formed in the outer side of the mounting bulge of the aluminum disc; the two ends of the flywheel ring are embedded in the mounting grooves of the aluminum discs correspondingly, and the flywheel ring synchronously rotates at a high speed along with the two aluminum discs. A pressing plate is mounted on the mounting groove through a fastener, and is used for pressing and fixing the end part of the flywheel ring in the mounting groove of the aluminum disc; two thread guide holes are formed in the flywheel ring, and the core strand and the upper thread correspondingly penetrate through the two thread guide holes respectively; a balancing weight is arranged on the side, away from the flywheel ring, of the aluminum disc. The number of the flywheel rings between the aluminum discs is reduced to be one, so that parts which are in high-speed contact friction with air are reduced, air resistance is further reduced, and in the operation process of the steel cord double-twisting machine, the rotation driving power for driving the cradle device is lower, and more energy is saved.

The application relates to a friction build-up welding repair method for metal parts and relates to the technical field of welding repair of metal materials. The main technical scheme is that in the process of adopting a raw material rod to perform friction build-up welding treatment on a metal part, a set type of cooling medium is applied to the raw material rod and the metal part in a set mode, heat generated in the friction build-up welding process is timely conducted, excessive softening and deformation of the raw material rod are inhibited, and the top forging pressure and the friction force of the raw material rod acting on the surface of the metal part are improved. The application is mainly used for improving the stability of the contact friction force and the top forging pressure of the raw material rod and the surface of the metal part in the friction build-up welding process, thereby promoting metallurgical combination of a build-up welding layer and a metal part interface, and thereby solving the problems of poor interface combination, poor surface forming quality, high repair cost and low material utilization rate of the existing friction build-up welding repair.

The utility model relates to a kind of coating device with antiskid conveying structure, core improvement is to replace the first over roller of traditional metal over roller of winding guide roller group with plastic material and the first over roller of surface being equipped with antiskid structure, to solve traditional technical defects.Plastic material friction coefficient is higher than metal, can naturally promote and the contact friction of flexible copper-clad plate substrate, surface antiskid structure is matched, can further increase effective contact area, make friction force multiple level promotion, ensure that flexible copper-clad plate substrate is stably and uniformly conveyed to winding mechanism.Meanwhile, plastic thermal conductivity is far lower than metal, surface temperature is little by environmental temperature and humidity fluctuation, not easy to reduce to dew point temperature below, reduce the condensation of over roller surface water vapor from the source, greatly reduce the probability of dewing, both eliminate the negative influence of water droplet on friction coefficient, consolidate antiskid effect, prevent flexible copper-clad plate substrate from being damp and deforming, improve the reliability and service life of final product.