39results about How to "Offset friction" patented technology

The invention discloses a metallographic grinding and polishing process. The metallographic grinding and polishing process comprises the steps that (1) the surface of a metallographic specimen is cleaned; (2) the surface of the metallographic specimen is ground; (3) the metallographic specimen is polished; and (4) cleaning is conducted. The metallographic specimen is cleaned and polished through vibration of an ultrasonic washing unit, when the metallographic specimen is cleaned, liquid inside the ultrasonic washing unit is industrial pure water, diamond abrasive grains, polishing paste and glycerinum are put into the ultrasonic washing unit for cleaning, resources can be saved, and influence on the subsequent grinding and polishing process can be avoided; a rubber soft bottom is arranged at the bottom of the metallographic specimen, so that the surface is prevented from being scratched in the grinding process, the metallographic specimen is dried for many times, oxidation of easily oxidized metals can be prevented in the operation process, and it is ensured that the surface of the metallographic specimen is even in color and has no water spot; coating of antirust agents is avoided, and the retention time is long in a vacuum environment.

The invention discloses a rotating disc and a card storing mechanism comprising the rotating disc. The rotating disc comprises a rotating disc body. Multiple card storing grooves used for storing intelligent cards are formed in the rotating disc body at an equal distance in the peripheral direction. Groove openings of the card storing grooves are formed in the cylinder face of the rotating disc body. The extending line of the length direction of each card storing groove and the circle center of the rotating disc body are staggered. The card storing mechanism comprises a rack, the rotating discvertically arranged on the rack, a rotating disc drive mechanism and a card storing and taking mechanism. The card storing and taking mechanism is installed on the rack and located on one side of thesecond rotating disc body. A bearing part used for bearing the intelligent cards is arranged below the rotating disc. According to the rotating disc, in the rotating process, the influence of centrifugal force on the intelligent cards in the rotating disc body can be reduced, and the intelligent cards in the rotating disc body can be prevented from moving relatively.

The invention discloses a continuous mechanical arm imitating a snake vertebra. The continuous mechanical arm imitating the snake vertebra comprises a base joint section, a head joint section and a plurality of driving wires. The continuous mechanical has the advantages that 1, load capacity is strong, and the strength and the load capacity of the spherical hinge joint are enhanced due to the arrangement of spherical hinged joints strong; 2, modeling is easy, the control difficulty is reduced, and the elastic force of a flexible supporting rod not only counteracts the friction force between the driving wires and wire guides, but also provides self-restoring force for the mechanical arm; 3, the mechanical arm is flexible for being capable of rotating by 360 DEG C; and 4, the mechanical armis easy to assemble and expand, wherein a space disc and the spherical hinged joints are combined into one and are directly arranged on the flexible supporting rod in series, the requirements can be met only by fixing a head end disc and a tail end disc, the assembly process is simple and effective, the length of a single-joint mechanical arm can be changed by increasing or decreasing the number of the spherical hinged joints which are arranged in series, and therefore, the mechanical arm has high expansibility.

The invention relates to an axis shifting type ballast direct shearing instrument. The direct shearing instrument comprises a counter force application rack and a direct shearing instrument main body arranged on the inner side of the counter force application rack, wherein the direct shearing instrument main body consists of a vertical loading mechanism vertically connected with the counter force application rack, a first shear box arranged below the vertical loading mechanism, a second shear box arranged below the first shear box, a horizontal loading mechanism horizontally connected with the first shear box, a base mechanism for supporting the direct shearing instrument main body, and a data collection mechanism for collecting pressure data and shifting data. The axis shifting type ballast direct shearing instrument is dedicated to performance detection of a railway ballast, and has the characteristics of being simple and convenient to assemble and disassemble, capable of accurately measuring the direct shearing performance of the railway ballast, movement components are connected through beads or rolling shafts so as to offset the friction among the movement components, the measurement precision can be guaranteed to the greatest extent, and the service life is favorably prolonged.

The invention discloses a pushing system and method for a PLC multipoint synchronous three-dimensional hydraulic bridge. The pushing system comprises a pushing monitoring system and multiple groups ofwalking-type three-dimensional hydraulic pushing devices for pushing pushed steel box beams, and each pushing buttress is provided with a left temporary supporting base and a right temporary supporting base which are symmetrically distributed. The pushing method includes the steps of 1, constructing assembly jig frames and temporary buttresses; 2, constructing a three-dimensional adjusting device, the pushing devices and the temporary supporting bases; 3, carrying out steel-box-beam assembling and synchronous pushing; 4, carrying out steel-box-beam pushing. According to the pushing system andmethod for the PLC multipoint synchronous three-dimensional hydraulic bridge, steel box beams are synchronously pushed forwards multiple times through the multiple groups of walking-type three-dimensional hydraulic pushing devices, pushing controlling is easy and convenient, synchronous action of the multiple groups of walking-type three-dimensional hydraulic pushing devices can be easily and conveniently achieved, pushing positions are flexibly distributed, guide beams and sliding rail beams for longitudinal pushing are not required, self-balancing pushing is really achieved, and the pushingprocess is safe and reliable.

The invention discloses a dough kneading machine, relates to food machinery, and is used for solving the problem of low dough kneading efficiency of common dough kneading machines. The machine comprises a machine frame, a material barrel arranged on the machine frame, a stirring paddle arranged in the material barrel and a power assembly which is arranged on the machine frame and used for drivingthe stirring paddle to rotate, wherein the stirring paddle comprises a rotating shaft which is rotatably arranged in the material barrel and spiral stirring blades which are fixed on the rotating shaft through a supporting pipe; the rotating shaft and the spiral stirring blades are all hollow bodies; the rotating shaft, the supporting pipe and cavities in the spiral stirring blades are interconnected with each other; water outlets are arranged and distributed on the spiral stirring blades; a water receiving pipe is arranged on the machine frame; and the rotating shaft is rotationally connectedto the water receiving pipe through a connector. The dough kneading machine has the following advantages and effects that: the dough kneading machine can inject water into flour through the hollow stirring paddle in the dough kneading process and omit the manual water adding process, and can simplify the dough kneading step and shorten the dough kneading time, thereby achieving the purpose of improving the dough kneading efficiency.

The invention belongs to the technical field of bridge expansion devices, and discloses an assembly combination modular expansion device which is convenient to replace and a preparation and maintenance process thereof. The device includes a side beam assembly combination profiled steel and a middle beam assembly combination profiled steel, the bottom of a side beam is provided with a displacementcontrol box with a cross beam, the side beam and a middle beam and an adjacent middle beam are connected by a displacement transmission device, and a waterproof rubber strip is arranged; the displacement transmission device comprises a polyurethane spring and spring tension adjusters, the spring tension adjusters are disposed at the bottoms of each middle beam, the adjusters are provided with screw rods penetrating through the middle beams, the bottoms of the screw rods are provided with two upper and lower separated nuts, the left portions and the right portions of the two nuts are respectively connected by linking rods, one end of the polyurethane spring is hinged to the side beam, and the other end is in bolt connection with the spring tension adjusters. The expansion device can solve the degradation of the tension caused by the long-term use of a spring, and the expansion and deformation of the device are kept uniform at all times. The device can fully assemble all components, provide convenience for replacing partially damaged components and reduce maintenance costs.

The invention discloses a steel box girder incremental launching construction method based on walking type three-dimensional hydraulic incremental launching equipment. The two ends of a construction steel box girder are each supported on a girder end pier, and the construction steel box girder is divided into a first girder body and a second girder body with a midspan pier being the boundary; incremental launching construction includes the steps that 1, temporary piers and midspan temporary piers are constructed; 2, incremental launching is conducted on the girder bodies synchronously throughthe walking type three-dimensional hydraulic incremental launching equipment; 3, midspan closing is conducted. The walking type three-dimensional hydraulic incremental launching equipment is adopted for conducting incremental launching on the two girder bodies synchronously until the two girder bodies of the constructed steel box girder are closed from two sides to the midspand; incremental launching of the walking type three-dimensional hydraulic incremental launching equipment is easy and convenient to control, multiple sets of walking type three-dimensional hydraulic incremental launching equipment can easily and conveniently act synchronously, incremental launching positions are arranged flexibility, a guide beam and a slideway beam used for longitudinal incremental launching are not needed, self-balance incremental launching is really realized, and the process of incremental launching is safe and reliable.

The invention relates to the technical field of printing and dyeing wastewater treatment related equipment, and discloses a belt filter press used for printing and dyeing wastewater treatment. The belt filter press includes a supporting plate. Connection pipes are fixedly mounted to left and right sides of the lower surface of the supporting plates. A vertical column is fixedly mounted on the right side of the upper surface of the supporting plate, and an inclined bar is fixedly connected to the left side of the supporting plate. The middle of the left side of the vertical column is fixedly connected to a connection plate. The left end of the connection plate is fixedly connected to the top end of the inclined bar. According to the belt filter press, through cooperation among a cross bar,limiting slots, a telescopic bar, a pull cap, a blocking bar and a shrinkable spring, a user can pull the pull cap to block the blocking bar in the limiting slots having different heights so that thedistance between upper and lower rotary rollers is changed indirectly, thus increasing pressure between the rotary cylinders and a filter belt, facilitating cleaning of impurities on the external surface of the filter belt by a user, and increasing the sludge conveying speed of the filter belt of the belt filter press.

The invention discloses a gate opening and closing device. According to the technical scheme, the gate opening and closing device comprises a dam body, a drainage channel is formed in the lower end ofthe dam body, and a gate for opening and closing the drainage channel is longitudinally arranged on the dam body in a sliding manner; and opening and closing equipment for controlling the gate to longitudinally reciprocate is mounted on the gate opening and closing device. The gate opening and closing device is characterized in that an opening and closing beam is fixed above the gate, and the opening and closing equipment comprises a winch and traction mechanisms which are used for connecting the winch and the gate and are correspondingly mounted on two sides of the gate, wherein the winch ismounted above the dam body; and each traction mechanism comprises a first traction part used for pulling the gate upwards and a second traction part used for helping the gate to be closed. Accordingto the gate opening and closing device, the problem that the gate cannot be completely closed by means of self weight is effectively solved, and the safety performance of the dam body is improved.

The invention discloses a self-pressure boosting system for a double-end mechanical seal. The self-pressure boosting system comprises a mechanical seal device, a balancing tank and a reaction tank, wherein the upper part of the balancing tank is connected with a sealing liquid inlet of a sealing cavity of the mechanical seal device through a pipeline, and the lower part of the balancing tank is connected with an in-kettle gas communication pipe of the reaction kettle through a pipeline; a piston and a piston rod are arranged in the balancing tank and are matched with each other; the piston is sealed with the cylinder wall of the balancing tank through an O-shaped seal ring; the piston rod slides along the axial direction; a spring is arranged on the piston rod. The self-pressure boosting system is simple in structure; the upper part of the balancing tank is connected with the sealing cavity through the pipeline, and the lower part of the balancing tank is communicated with the reaction kettle through the pipeline, so that the pressure in the kettle is transferred to the sealing cavity through the piston in the balancing tank; the self-pressure boosting system is suitable for occasions where mediums in the kettle cannot be mixed with sealing liquid.

The invention discloses an auxiliary tube drawing device for deep hole karst grouting and a construction method thereof. The device comprises a big drilling rod (1), an external tube (2), a steel sleeve (3) and a small drilling rod (4); the diameter of the big drilling rod (1) is larger than the diameter of the external tube (2), the diameter of the external tube (2) is larger than the diameter of the steel sleeve (3), the diameter of the steel sleeve (3) is larger than the diameter of the small drilling rod (4), the external tube (2) is shorter than the steel sleeve (3), the external tube (2) is arranged outside the steel sleeve (3), and the steel sleeve (3) is arranged under a bed rock face. The construction method comprises the steps that a drilling machine strikes the big drilling rod to be underground, after the big drilling rod is drawn out, the external tube is struck in, the steel sleeve is struck to be under the bed rock face inside the external tube by adopting the drilling machine, and the steel sleeve is left in rock; the small drilling rod is struck to be under the bed rock face or under a bottom karst cave inside the steel sleeve, after the small drilling rod is drawn out, a stop-grouting plug is arranged downwards, then grouting is conducted, after the grouting is completed, the steel sleeve is drawn out in case the steel sleeve needs to be recycled, then the next hole grouting construction is conducted, and the process is recycled.

The invention discloses a ratchet wheel-bevel gear transmission knee joint negative work capturing lower limb exoskeleton. The exoskeleton comprises a thigh supporting plate, a shank supporting rod, a gear train carrying platform and a knee joint gear mechanism, one end of the gear train carrying platform is fixedly connected with the thigh supporting plate, and the other end of the gear train carrying platform is rotationally connected with the knee joint gear mechanism through a first axial rotating piece; and the end, away from the connected gear train carrying platform, of the knee joint gear mechanism is connected with the shank supporting rod, a coil spring is further arranged on the first axial rotating piece, the inner end point of the coil spring is fixedly connected to the first axial rotating piece, and the outer end point of the coil spring is used for being fixedly connected with the gear train carrying platform so that the coil spring can be compressed during knee stretching movement, and resetting is realized during knee bending movement. According to the scheme, negative work in the knee joint stretching process can be effectively absorbed, then impact of the negative work on a knee joint is relieved, and the knee joint is effectively protected.

The invention discloses a permanent magnet contra-rotating propulsion motor and an aircraft. The permanent magnet contra-rotating propulsion motor comprises two sets of stator and rotor assemblies installed in a motor shell, each stator and rotor assembly comprises a stator assembly and a rotor assembly which are matched with each other, and the two rotor assemblies are connected with the shaftless propellers respectively. The inner wall of each stator assembly and the outer wall of the corresponding rotor assembly form a certain included angle with the axis of the motor, the included angles are the same, and the two shaftless propellers are coaxially arranged. The permanent magnet contra-rotating propulsion motor provided by the invention has the advantages of simple and compact structure, low bearing friction loss, high propulsion efficiency, long endurance mileage and the like, is stable in operation performance and long in service life, is suitable for being used in different pressure environments, and has wide application prospects in various aircrafts.

The invention discloses a permanent magnet conical propulsion motor and an aircraft. The permanent magnet conical propulsion motor comprises a stator (2) and a rotor (3) which are installed in a machine shell (1), the stator (2) and the rotor (3) are matched with each other through a bearing (6), the rotor (3) is connected with one end of a transmission shaft (5), and the other end of the transmission shaft (5) penetrates out of the machine shell (1) and is connected with a propeller. The inner wall of the stator (2) and the outer wall of the rotor (3) are parallel to each other and form a certain included angle with the axis of the motor, and an air gap is further distributed between the inner wall of the stator (2) and the outer wall of the rotor (3). The permanent magnet conical propulsion motor provided by the invention has the advantages of simple and compact structure, low bearing friction loss, high propulsion efficiency, long endurance mileage and the like, is stable in operation performance and long in service life, is suitable for being used in different pressure environments, and has wide application prospects in various aircrafts.

The invention discloses pipe degreasing equipment based on an ultrasonic cleaning technology and a using method thereof, and belongs to the field of stainless steel pipe treatment equipment. The pipedegreasing equipment based on the ultrasonic cleaning technology comprises a moving pipe and a pipe, one end of the moving pipe communicates with a water pipe, the end, away from the water pipe, of the moving pipe is sleeved with a contraction body, and the contraction body comprises a stretching pipe which is filled with magnetic fluid. The pipe degreasing equipment can achieve ultrasonic degreasing treatment of an ultra-long pipe, and can be suitable for pipes with different calibers, the degreasing equipment can make adaptive changes according to the calibers of the pipes through the adsorption effect of a magnetic field on the magnetic fluid, and the degreasing equipment in the pipe can move along with the attraction force, so that the operation is simple, rapid and convenient, and thetreatment efficiency is high; and an activated carbon attraction net capable of wiping grease is further arranged behind a sprayed degreasing agent so that grease failing to fall off can be further cleared, the degreasing effect is improved, and the whole equipment is simple in structure, low in cost and easy to operate.

The invention discloses a forage grass chopping and rubbing method and machine and particularly relates to the technical field of forage grass machining. The forage grass chopping and rubbing method comprises the four steps of chopping, feeding , rubbing and discharging. The forage grass chopping and rubbing machine is composed of a chopping chamber, a feeding chamber, a rubbing chamber, a discharging cylinder and an air duct. A chopping assembly is arranged in the chopping chamber. A shaking mechanism is arranged in the feeding chamber. The chopping assembly and the shaking mechanism are connected with the same belt drive wheel set. A rubbing component is arranged in the rubbing chamber. A spiral mixing wheel is arranged in the discharging cylinder. The whole machine integrates the functions of chopping, rubbing, smashing and screening and has high applicability; besides, the machine is simple in structure, good in compactness and small in occupied area; and meanwhile, the arranged shaking mechanism improves the feeding speed, counteracts friction force, prevents blockage and rotation stop problems of the rubbing component in the rubbing chamber, and guarantees normal operation ofthe machine, and the work efficiency of the whole machine is improved.

The invention discloses a simple engineering vehicle ramp parking device and a construction method. The simple engineering vehicle ramp parking device comprises a base and a pressure-bearing beam. The base is provided with a plurality of main keels arranged in parallel, the main keels are perpendicular to the base, the tops of the plurality of main keels are all connected to the pressure-bearing beam. One end of each clamping groove beam is further connected to the connecting point of the pressure-bearing beam and the main keel, the other end of each clamping groove beam is connected to the base, the clamping groove beams are obliquely arranged on the base, and the distance between every two adjacent clamping groove beams is larger than the width of a tire; the areas defined by the pressure-bearing beams, the base and the adjacent clamping groove beams are clamping grooves, and when parking is completed, tires located in the clamping grooves do not make contact with the ground. The device can meet the acting force generated by ramp parking of the engineering vehicle, a good supporting effect is achieved, the safety of ramp parking of the engineering vehicle is greatly improved, and bricks and tiles are added for safety engineering in the construction process.

The invention discloses an auxiliary tube drawing device for deep hole karst grouting and a construction method thereof. The device comprises a big drilling rod (1), an external tube (2), a steel sleeve (3) and a small drilling rod (4); the diameter of the big drilling rod (1) is larger than the diameter of the external tube (2), the diameter of the external tube (2) is larger than the diameter of the steel sleeve (3), the diameter of the steel sleeve (3) is larger than the diameter of the small drilling rod (4), the external tube (2) is shorter than the steel sleeve (3), the external tube (2) is arranged outside the steel sleeve (3), and the steel sleeve (3) is arranged under a bed rock face. The construction method comprises the steps that a drilling machine strikes the big drilling rod to be underground, after the big drilling rod is drawn out, the external tube is struck in, the steel sleeve is struck to be under the bed rock face inside the external tube by adopting the drilling machine, and the steel sleeve is left in rock; the small drilling rod is struck to be under the bed rock face or under a bottom karst cave inside the steel sleeve, after the small drilling rod is drawn out, a stop-grouting plug is arranged downwards, then grouting is conducted, after the grouting is completed, the steel sleeve is drawn out in case the steel sleeve needs to be recycled, then the next hole grouting construction is conducted, and the process is recycled.

The invention belongs to the technical field of bridge expansion devices, and discloses an assembly combination modular expansion device which is convenient to replace and a preparation and maintenance process thereof. The device includes a side beam assembly combination profiled steel and a middle beam assembly combination profiled steel, the bottom of a side beam is provided with a displacementcontrol box with a cross beam, the side beam and a middle beam and an adjacent middle beam are connected by a displacement transmission device, and a waterproof rubber strip is arranged; the displacement transmission device comprises a polyurethane spring and spring tension adjusters, the spring tension adjusters are disposed at the bottoms of each middle beam, the adjusters are provided with screw rods penetrating through the middle beams, the bottoms of the screw rods are provided with two upper and lower separated nuts, the left portions and the right portions of the two nuts are respectively connected by linking rods, one end of the polyurethane spring is hinged to the side beam, and the other end is in bolt connection with the spring tension adjusters. The expansion device can solve the degradation of the tension caused by the long-term use of a spring, and the expansion and deformation of the device are kept uniform at all times. The device can fully assemble all components, provide convenience for replacing partially damaged components and reduce maintenance costs.

The technical solution of the present invention is achieved in the following way: a gate opening and closing device, including a dam body, a drain channel is provided at the lower end of the dam body; a gate for opening and closing the drain channel is longitudinally slid on the dam body, and installed There is an opening and closing device for controlling the longitudinal reciprocating movement of the gate, which is characterized in that an opening and closing beam is fixed above the gate, and the opening and closing equipment includes a winch and a traction mechanism for connecting the winch and the gate and respectively installed on both sides of the gate , the winch is installed above the dam body; the traction mechanism includes a first traction part for pulling up the gate and a second traction part for helping the gate to close; The problem of closure can be improved to improve the safety performance of the dam body.

The invention discloses a dough kneading machine, relates to food machinery, and is used for solving the problem of low dough kneading efficiency of common dough kneading machines. The machine comprises a machine frame, a material barrel arranged on the machine frame, a stirring paddle arranged in the material barrel and a power assembly which is arranged on the machine frame and used for drivingthe stirring paddle to rotate, wherein the stirring paddle comprises a rotating shaft which is rotatably arranged in the material barrel and spiral stirring blades which are fixed on the rotating shaft through a supporting pipe; the rotating shaft and the spiral stirring blades are all hollow bodies; the rotating shaft, the supporting pipe and cavities in the spiral stirring blades are interconnected with each other; water outlets are arranged and distributed on the spiral stirring blades; a water receiving pipe is arranged on the machine frame; and the rotating shaft is rotationally connectedto the water receiving pipe through a connector. The dough kneading machine has the following advantages and effects that: the dough kneading machine can inject water into flour through the hollow stirring paddle in the dough kneading process and omit the manual water adding process, and can simplify the dough kneading step and shorten the dough kneading time, thereby achieving the purpose of improving the dough kneading efficiency.

The respiratory training device comprises a breathing nozzle and a piston cylinder connected with the left end of the breathing nozzle, a training piston is assembled in the piston cylinder in a guiding and moving mode in the left-right direction, and a left-side assistance circulating belt and a right-side assistance circulating belt which are arranged in the left-right direction are arranged in the piston cylinder; the upper side circulating belt part of the left-side power-assisted circulating belt moves from right to left, the upper side circulating belt part of the right-side power-assisted circulating belt moves from left to right, a left-side rubber force transmission block is hinged to the top of the left-side assembling groove, and a right-side rubber force transmission block is hinged to the top of the right-side assembling groove; the left side rubber force transmission block is lapped on the upper side circulating belt part of the left side power-assisted circulating belt in a leftward inclined manner from top to bottom, and the right side rubber force transmission block is lapped on the upper side circulating belt part of the right side power-assisted circulating belt in a rightward inclined manner from top to bottom. The technical problem that in the prior art, due to the fact that the breathing load of a patient is too large, the breathing frequency of the patient cannot be accurately reflected is solved.

The invention discloses a wearable device with a shock absorbing function, comprising a shoe body; the shoe body comprises a sole and a vamp, the vamp is glued to the sole, a plurality of open cavities is arranged on the inner part of the vamp , a stripper plate is connected with the bottom surface of the cavity via a elastic device, and an air bag is arranged between the stripper plate and the bottom surface of the cavity; a first hole is arranged on the stripper plate, the air bag is connected with the first hole through a first airway, the cavity is connected to the lateral surface of the sole through a second hole, and the air bag is connected to the second hole through a second airway, and insoles are arranged between the vamp and the sole; the insoles comprise a upper insole and a lower insole, the upper insole is connected with the side of the lower insole via a elastic belt, a installation position is arranged on the upper surface of the lower insole, a heating wire is set inside the installation position, the heating wire is connected with a power, several elastic pillars are arranged on the upper surface of the lower insole, an elastic harness is arranged on the upper surface of the upper insole and is parallel to the width direction of the upper insole.

The technical solution of the present invention is achieved as follows: a hydraulically assisted gate opening and closing device includes a base, a gate body and opening and closing equipment arranged on the base, an auxiliary well is opened on the base, and the The opening and closing equipment includes a hoisting mechanism, a door opening mechanism and a door closing mechanism. The hoisting mechanism includes a motor and a rotating assembly. The door opening mechanism includes a first force wire rope. The door closing mechanism includes a weighted water tank, a second force wire rope , door-closing wire rope, and the first fixed pulley, the third fixed pulley, and the fourth fixed pulley fixed on the base; the present invention achieves the purpose of opening and closing the gate by switching between the first main force steel wire rope and the second main force steel wire rope, and simultaneously utilizes The weighted water tank balances the friction force when opening and closing the gate, which facilitates the opening and closing of the gate, and at the same time reduces the required kinetic energy, reduces the load on the motor, and improves the service life of the equipment.