20 results about "Friction effect" patented technology

The invention relates to the technical field of grinding equipment, in particular to a wind power flange edge hole grinding device which comprises a base, a plurality of stand columns are fixed to the top of the base, a supporting disc is fixed to the tops of the stand columns, a positioning mechanism is arranged at the top of the supporting disc and used for positioning a flange, and a plurality of spherical grooves are formed in the supporting disc. Balls are slidably connected to the interiors of the spherical groove bodies, the balls protrude out of the upper surface of the supporting disc, the balls are connected with locking mechanisms, and after the flange is positioned, the locking mechanisms are used for fixing the balls; the innovative design of the balls and the locking mechanism is adopted, the spherical grooves formed in the supporting disc are matched with the balls, low-friction flexible supporting is achieved in the positioning stage, the positioning efficiency is greatly improved, meanwhile, direct contact between the wind power flange and the supporting disc can be avoided, damage to the wind power flange due to the friction effect can be avoided, and the service life of the wind power flange is prolonged. And the flange reference surface precision is protected.

The utility model relates to a paint coating mould technical field proposes a kind of paint coating mould automatic aligning device, including frame body: the inside sliding connection of frame body has adjusting slider one, the side fixedly connected with pneumatic telescopic link of adjusting slider one, the extension end fixedly connected with fixed block of pneumatic telescopic link, the inside fixedly connected with motor two of fixed block, the output fixedly connected with rotating round plate of motor two, the rotation of rotating round plate can be realized by the motor two of being set, to be able to realize the rotation of positioning sleeve and threading block under the friction effect of antiskid ring one and antiskid ring two, further realize the rotation of threading body, the rotation of threading body can be limited in fixed position by the L-shaped limit rod and limit turntable of being set, the extension of threading body distance can be realized by telescopic pneumatic telescopic link.

The utility model discloses a deviation correction device of a conveying belt, which relates to the field of glass bottle production and is technically characterized by comprising a conveying frame, two conveying rollers are arranged in the conveying frame, the conveying rollers are sleeved with the conveying belt, and limiting rings are arranged on two sides of each conveying roller. And a plurality of correction bottom plates are arranged at the top of the conveying frame, so that the problems that under the condition of heavy load, the friction force between the conveying belt and the limiting rings is increased, the surfaces of the limiting rings are abraded and even possibly damaged due to the long-term friction effect, and the conveying belt is damaged due to the friction force between the conveying belt and the limiting rings are solved. The technical problems that due to the fact that the limiting ring loses the limiting effect, a conveying belt deviates from a preset track in the operation process, glass bottles incline or turn over in the conveying process due to deviation of the conveying belt, and the risk of bottle breaking is increased are solved.

According to the method for testing the effective prestress of the existing concrete structure considering the reverse friction influence, a plurality of prestressed tendons are pre-buried in concrete to form an in-service prestressed concrete member, and one prestressed tendon at the end part of the concrete is stretched by using a supplementary tensioning tool; in the stretching process, the obtained stretching stress of the prestressed tendon, the corresponding stretching length measured from the failure of friction constraint between an anchorage device and a wedge-shaped clamping piece of the prestressed tendon and the effective stress of the in-service prestressed concrete member are recorded for at least five times, and the obtained stretching stress and the corresponding stretching length are the secondary reverse friction force influence stress; selecting the friction coefficient of local deviation of the length per meter in the pore channel and the friction coefficient between the prestressed tendon and the wall of the pore channel from the anti-friction influence length corresponding to the anti-friction influence stress; finding out an optimal one; and calculating the effective stress of the out-service prestressed concrete member by using any recorded tensile length.

The utility model discloses a kind of pipe material segmented lifting equipment, belong to hoist technical field, its technical scheme main point is: including bunker, hoist and slide, bunker is used to accommodate pipe material, hoist is set in bunker, hoist is used to lift pipe material, slide is obliquely set in bunker, slide is used to guide pipe material in bunker to hoist, further include segmented device, segmented device is located in bunker, segmented device is used to limit the pipe material of bunker bottom to make it away from hoist, when the pipe material in bunker is below certain height, segmented device removes the restriction of pipe material at the bottom of bunker to make pipe material along slide close hoist, this lifting equipment is by segmented lifting pipe material, can effectively reduce mutual collision interference between pipe material, make pipe material keep relatively orderly distribution state, reduce the possibility of cross inclination, and extrusion friction effect between pipe material is weakened, reduce the risk of jamming and damage when feeding.

The present application relates to a kind of powder processing device and method for improving powder sphericity and surface finish, including processing cylinder and multiple rotating mechanism, lower rotating mechanism includes stirring blade, can be rotated in positive direction, upper rotating mechanism includes shaping blade, can be rotated in positive direction or reverse direction.The stirring blade of lower rotating mechanism is a certain obtuse angle with the direction of rotation, can better lift up powder, the shaping blade of upper rotating mechanism includes two inclined planes of positive and negative direction.The rotating direction of upper and lower rotating mechanism is opposite first, the inclined plane of shaping blade towards the direction of rotation is opposite with the direction of movement of the powder lifted up, angle is close to vertical, impact and break up agglomerated powder and satellite ball, then the rotating direction of upper and lower rotating mechanism is same, the inclined plane of shaping blade towards the direction of rotation is close to the direction of movement of the powder lifted up, mainly with friction effect, improve powder surface finish.The stirring blade of lower rotating mechanism makes the friction effect between powder particles in cylinder, can also quickly improve the surface finish of powder.

The application discloses a steel formwork with partially detachable end part of prefabricated long and large box girder, belongs to the technical field of prefabricated concrete beam production, and has a downward detaching mechanism for the bottom die strip in the range of width D close to the end part along the direction of the bridge, and has an outward detaching mechanism for the side die block in the range of height H close to the bottom along the vertical direction, and the surface of the bottom die strip and the side die block after being detached can form a height difference with the surface of the outer formwork, the height difference being h. The use method is as follows: after the concrete is poured and completed, the end part of the outer formwork is subjected to a preset detaching behavior before the prestressed steel strand is tensioned, so that the contact surface provided by the outer formwork can effectively adapt to the upward deflection of the beam body after the prestressed steel strand is tensioned, and thus the phenomenon that the stress is concentrated at the end part of the beam body and the friction effect is remarkable is effectively improved, and the problem that cracks are generated at the edge of the end part of the bottom plate during the prefabrication of the long and large box girder is fundamentally solved.

The invention belongs to the field of iron tower climbing, and particularly relates to an electric iron tower climbing anti-falling device which comprises a sliding rail, the sliding rail is arranged to be in a T shape, a mounting plate is arranged on one side of the sliding rail, a clamping assembly is arranged in the mounting plate, two sliding rods are symmetrically and slidably connected to the inner wall of the mounting plate, and one end of each sliding rod is fixedly connected with a first limiting block; the other ends of the two sliding rods are fixedly connected with second limiting blocks, and adjusting assemblies are arranged at the tops of the sliding rods. According to the climbing anti-falling device for the electric power iron tower, the position of a sliding rod is adjusted through cooperation of a clamping block and a clamping groove, a mooring rope is made to be away from the position of a mounting plate, when a constructor accidentally falls, the constructor can easily pry a second limiting block to move downwards through the weight, a rubber pad is made to tilt upwards and abut against the back face of a sliding rail, and the safety of the constructor is improved. The situation that the friction effect of the rubber pad is affected due to the fact that a linear falling line of constructors is close to a moving line of the falling protector is avoided.

The utility model discloses an electric power construction insulation operating rod which comprises a square tube and a screw rod, a connecting ring is fixedly installed at the bottom end of the outer side wall of the square tube, a bearing is fixedly installed on the inner side wall of the connecting ring, a rotating tube is fixedly installed at the top of the inner ring of the bearing, a nut is fixedly installed at the top end of the rotating tube, and the rotating tube and the nut are both located in the square tube. The bottom end of the square tube is connected with the bearing through the connecting ring, the inner ring of the bearing is connected with the nut through the rotating tube, the inner side wall of the nut is connected with the screw, the screw is connected with the inner side wall of the nut through the rotating tube, and the bottom end of the screw extends to the lower side of the interior of the square tube. During use, the bottom end of the square pipe can be located near the eyes of a worker, then operation is conducted, the height position of the hook can be calibrated conveniently, the limiting sliding block is composed of a square block and limiting wheels on the two sides, traditional sliding limiting is changed into rolling limiting, the friction effect is greatly reduced, and operation of the worker is facilitated.

The utility model relates to the technical field of ground cleaning machines, and discloses a ground cleaning machine adjusting mechanism which comprises a cleaning machine body, the cleaning machine body comprises a machine frame, moving wheels are arranged at the bottom end of the machine frame, an installation cover is embedded in the center of the machine frame, a through hole is formed in the surface of the installation cover, and a dust suction pipe is inserted into the through hole. A dust suction opening is formed in the bottom end of the dust suction pipe, and a movable plate and a fixed plate are arranged on the surface of the dust suction pipe from top to bottom. According to the adjusting mechanism of the ground cleaning machine, in the using process, the buffering adjusting assembly is arranged, a movable plate is slidably installed on the surface of a limiting sliding rod, and the movable plate is driven to move downwards through an abutting spring, so that a sweeping roller can abut against the ground, and the friction effect between the sweeping roller and the ground is ensured; and when rigid collision occurs between the sweeping roller and an external object, the sweeping roller can move upwards to avoid through upward movement of the movable plate, and the effect of avoiding and buffering in the vertical direction is achieved.

The utility model discloses a piezoelectric actuator comprising an elastic tube, two ends of which are respectively provided with a first port and a second port; the first sealing piece is arranged at one end of the elastic pipe and seals the first port; the second sealing piece is arranged at the other end of the elastic pipe and seals the second port, and a sealed cavity is defined by the elastic pipe, the first sealing piece and the second sealing piece; the stack piezoelectric ceramic is arranged in the closed cavity, the two ends of the stack piezoelectric ceramic are connected with the first closed part and the second closed part respectively, and the elastic pipe is always in a stretched state; one of the first sealing piece and the second sealing piece is provided with a wire for electrically connecting the stacked piezoelectric ceramic with an external power supply, and the other one is provided with an actuating end for applying pressure to the outside. According to the application, the elastic tube can be driven to deform along with the deformation of the stacked piezoelectric ceramic by utilizing the characteristic that the elastic tube can be telescopically deformed. Therefore, an existing shaft hole matching structure can be omitted, and the negative influence of the friction effect on the output linearity of the stacked piezoelectric ceramic is avoided.

The utility model discloses an impeller assembly for an impact crusher, which is positioned in an impact cavity and comprises an impeller body and a flexible cleaning structure which is arranged on the impeller body and synchronously rotates along with the impeller body, and a crushing discharge port is formed between the impeller body and a bottom plate of the impact cavity. And the flexible cleaning structure is positioned above the crushing discharge port to clean the crushing discharge port so as to prevent the crushing discharge port from being blocked by crushed materials. The flexible cleaning structure is arranged on the impeller body and rotates along with the impeller body attached to the discharging port, materials are prevented from being stacked at the discharging port, the flexible rope chain rotates along with the impeller, bonding materials on the path are continuously whipped, the material nesting area is reduced, and the effective use size of the impact cavity is increased; and the impact friction effect between the materials is improved, and the shaping and crushing effect of the materials is improved.

Provided are sliding components capable of obtaining a stable low-friction effect under a wide range of conditions of use. A sliding component has a relatively sliding surface. A base material of one of the sliding components is coated with a graphite film, and the sliding surface of the other of the sliding components is made of the graphite film.

The mechanical arm for machining comprises a top plate and a protruding block, the protruding block is fixedly connected to the bottom end of the top plate, four electric telescopic rods and a rotary torsion rod are evenly and fixedly installed on the side wall of the protruding block in the circumferential direction, so that the protruding block can be clamped into two arc-shaped grooves, and unstable material clamping can be prevented; the corresponding torsion bar is rotated to pass through the space between the two connecting plates, then the L-shaped plate can be disassembled, when heavy materials need to be clamped, oil is continuously added into the oil cylinder through a pump, the friction plate is driven to move upwards along with the oil cylinder, the friction effect between the friction plate and the materials is increased, the heavy materials can be clamped, and the work efficiency is improved. When the friction plate moves upwards, the first U-shaped block also moves upwards along with the friction plate, at the moment, under the action of the hinge rod, the base plate is driven to extend out of the collecting groove along the inner bottom face of the collecting groove to be cushioned at the bottom end of materials, the supporting effect is achieved, the materials can be prevented from falling off, and harm to operators is reduced.

The utility model discloses an intelligent material surface wear resistance detector belongs to wear resistance detector technical field, including the feeding table, is installed with the support portal on it, and the transmission frame is slidably installed on the support portal, and the hydraulic cylinder is installed on the support portal simultaneously, and it is used to drive transmission frame to move up and down, and the force measurement presses down the frame, and it is installed in transmission frame downside, and the friction roller subassembly is installed in force measurement presses down the frame downside, and the rotary drive mechanism is used to drive friction roller subassembly rotation. Its technical key points are: in the detection process, because friction roller subassembly always is in conformity with material surface and its applied pressure is almost invariable, can ensure the stability of the friction effect that applied in the test process, and will not cause the deformation of material surface to impact, in addition, when simulating different test conditions, the force that spring force measuring mechanism transmits is adjusted through the stroke control of hydraulic cylinder, and then the wear resistance of material surface is measured under different pressure working conditions.

The utility model discloses a placing rack for copper rod production, which structurally comprises a placing box, a bottom plate and limiting rods, the position of an inner groove is adjusted through connecting screw rods on the inner sides of the limiting rods, so that the distance between the limiting rods is convenient for placing a copper rod, and then the copper rod is placed between the limiting rods. The bottom ends of the copper rods are inserted into bottom positioning holes, and the copper rods can be inserted into different limiting rods for insertion placement under rotation of the center columns, so that the situation that the copper rods are stacked is avoided, the friction effect between the copper rods is reduced, the lifting plate drives the upward center columns to be upward under pushing of the electric push rods, and the copper rods are placed in the center columns. Therefore, the top end of the copper rod makes contact with the top plate to apply acting force, the pressure sensor stops moving upwards after being stressed, the upper end and the lower end of the copper rod are stressed, clamping work of the copper rod is achieved, the situation that the copper rod shakes is avoided, stability is better, mutual collision is reduced, and storage safety is better.

The utility model discloses an anti-skidding type scissor lift which comprises a base and a top seat, a lifting mechanism is arranged in the middle of the top seat and the base, a supporting bottom plate is fixedly connected to the bottom end of the base in a threaded mode, and an anti-skidding bottom plate for increasing supporting friction force is arranged at the bottom end of the supporting bottom plate. Embedding blocks for mounting are fixedly mounted at the bottom end of the supporting bottom plate, the embedding blocks are symmetrically and fixedly mounted at the bottom end of the supporting bottom plate, and embedding grooves are symmetrically formed in the top end of the anti-skid bottom plate; the hydraulic cylinder drives the antiskid plate to press downwards, antiskid strength can be flexibly controlled, different ground conditions can be adapted, universality is enhanced, special texture design of the antiskid plate greatly improves friction force between the antiskid plate and the ground, stable ground gripping is ensured, and a double antiskid structure of the antiskid bottom plate and the antiskid plate not only increases contact area, but also strengthens friction effect. The anti-skid function can be quickly started and relieved, the stability and safety of the elevator during lifting operation are effectively guaranteed, the sideslip risk is reduced, and the operation reliability is improved.

The invention discloses a double-row opposite spanning frame stress analysis method which comprises the following steps: acquiring a wind load based on structure parameters and environmental parameters of a spanning frame; based on the wind load and the pull force of the bearing rope, calculating the pull force of the cable rope by combining the included angle of the cable rope to the ground; based on the accident state wire parameters, calculating wire downforce; calculating a horizontal load based on the lead down force and the friction coefficient; and based on the wind load, the tension of the bearing rope, the horizontal load, the tension of the cable wind rope, the downward pressure of the wire and the structural parameters of the spanning frame, completing the stress analysis of the double-row opposite spanning frame. According to the method, the comprehensiveness and accuracy of stress analysis of the double-row opposite crossing frame can be comprehensively improved, and the limitation of a traditional empirical formula and a simplified model is effectively overcome. By comprehensively considering the coupling influence of multiple factors such as the wind-cable coupling effect, the accident impact load and the friction effect, the reliability of structural safety assessment is remarkably improved.

The utility model belongs to the technical field of constructional engineering, and particularly discloses a high-strength protective device for constructional engineering, which comprises side support beams, cross rods, rope support rings, support ropes and a steel wire protective net, the cross rods are equidistantly arranged on the upper surfaces of the side support beams, the rope support rings are correspondingly arranged on the upper surfaces of the adjacent cross rods, and the support ropes are arranged on the support ropes. The two ends of the supporting rope are inserted between the rope supporting rings on the adjacent cross rods, and damping protruding rings are evenly arranged on the side, located outside the rope supporting rings, of the supporting rope. According to the scheme, the steel wire protection net is adopted, the structural strength is relatively high, heavier falling objects can be supported, and the protection effect on the lower side can be guaranteed. The supporting rope drives the damping convex ring to move in the rope supporting ring, certain impact force is absorbed through the friction effect between the damping convex ring and the rope supporting ring, a certain damping effect is achieved, and then after a heavy object is cleaned, the two ends of the supporting rope are pulled out of the rope supporting ring.