40results about How to "Frictional stability" patented technology

The invention discloses a lubricating oil containing illite/montmorillonite clay nano powder and a preparation method thereof, belonging to the field of new application of phyllosilicate clay minerals. The lubricating oil is composed of oleic acid modified illite/montmorillonite clay nano powder and III type base oil, wherein the oleic acid modified illite/montmorillonite clay nano powder accounts for 0.5-2.5 wt% of the lubricating oil. The preparation method comprises the following steps: (1) crushing natural illite/montmorillonite clay minerals, and adding water to obtain a slurry; (2) regulating the pH value of the slurry, and dispersing; (3) screening the slurry through a sieve; (4) grinding the undersieve slurry to obtain a nano slurry; (5) adding oleic acid for modification; (6) drying the modified nano slurry to obtain nano dry powder; and (7) mixing the nano dry powder with III type base oil to obtain the lubricating oil containing illite/montmorillonite clay nano powder. By using the illite/montmorillonite clay nano powder as the additive, the lubricating oil has the advantages of favorable friction and wear resistance, environment friendliness and no pollution.

The invention discloses a method for improving the high toughness of a titanium aluminum nitrogen coating on the surface of a hard alloy. The method comprises the following steps of placing a pretreated hard alloy sample onto a double-glow plasma surface alloying furnace sample table, suspending a self-made target material, and placing an auxiliary cathode; feeding argon after vacuumizing, applying high voltage to a cathode and a source electrode, maintaining a certain differential pressure, carrying out tantalum impregnation treatment on the sample after re-sputter cleaning; then taking a tantalum-impregnated sample out, loading onto a substrate table of a magnetron sputtering device, installing a titanium aluminum composite target, adjusting the distance between the target material and the sample, carrying out ion beam sputtering cleaning, then enabling the substrate table to directly face a direct-current pulse magnetron sputtering target, feeding argon and nitrogen, adjusting to acertain proportion, starting a grid bias power supply and a direct-current pulse power supply, and preparing the titanium aluminum nitrogen coating. The titanium aluminum nitrogen composite coating prepared through the method has high fracture toughness and bonding strength.

The invention relates to the field of mining mechanical equipment, in particular to a friction loss experiment device and method under multidirectional vibration of a steel wire rope and a gasket. Thedevice comprises a base, a rack fixed at the upper part of the base, and a friction mechanism fixed on the rack. A steel wire rope is wound on the friction mechanism; friction gaskets are arranged onthe surfaces, making contact with the steel wire rope, of the friction mechanism. One end of the steel wire rope is fixedly connected with a counterweight mechanism; the other end of the steel wire rope is connected with a vibration excitation mechanism for generating three-dimensional vibration at the other end; the rack is provided with a measuring mechanism used for measuring the ultimate friction force between the steel wire rope and the gasket. The vibration excitation mechanism and the measuring mechanism are controlled by the control system. The friction force measurement under different steel wire rope vibrations can be realized, and the rope-gasket limit friction force loss degree under different amplitudes, directions, positions and different pre-tightening forces can be analyzed.

The invention provides a pressure sensor, a preparation method and application thereof, and a wearable intelligent fabric comprising the pressure sensor. The pressure sensor is made of graphene modified polyurethane foam; wherein on the basis that the total mass of the graphene modified polyurethane foam is 100%, the mass percentage of the graphene is 0.8-2.5%. The wearable intelligent fabric prepared by the sensor provided by the invention is a wearable platform completely based on the fabric, and has a wide application value.

The present invention is a cut-off unit with constant chip volume cutting for machine tools. The cut-off unit maintains a constant chip volume during cutting, which stabilizes friction between the blade of the cutting disk, the teeth of the cutting disk and the chips in between the teeth. In this manner, the working life of the blade and the speed metal bars at the cut-off unit can be controlled for extending the working life of the blade and for increasing the efficiency of time required for cutting or shearing at the cut-off unit. Advancement speed of the cut-off unit, which is guided by a logic-control unit, is continuously and regularly adapted, to keep the volume of chip cut away and accumulated in each gap between the teeth of the blade constant. When cutting a bar, the advancement speed will be higher at the beginning and at the end of the cut, and lower in the central part.

A bidirectional pivot structure includes a horizontal rotation axis module, a rotation switching device and a vertical rotation axis module. The rotation switching device is pivotally connected to the horizontal rotation axis module and the vertical rotation axis module. The vertical rotation axis module includes an aligning element, a rotation position limiting element, a stabilizing element, a flexible element and a locking element. The rotation position limiting element has a position limiting convex dot and a position limiting arc fitted to a guide rail and a position limiting protrusion of the aligning element for limiting the rotary angle of the vertical rotation axis module. The stabilizing element has a positioning convex dot and a stabilizing protrusion fitted to the positioning holes of the aligning element to maintain a frictional stability. By the design of the aligning element, rotation position limiting element and stabilizing element, the effect of limiting and positioning the vertical rotation axis module can be achieved.

The invention relates to a nano-silicon carbide fiber modified C/C sealing material and a preparation method thereof, belonging to the technical field of high-performance friction sealing material development. The sealing material designed by the present invention includes the following components in terms of mass percentage: carbon fiber prefabricated body + deposited carbon 86.5-96.99%, nano-Ni0.01-0.5%, nano-silicon carbide fiber 3-13%; the nano-carbonized The silicon fiber is evenly attached to the carbon fiber preform, and the deposited carbon is coated on the surface of the carbon fiber preform, nano-silicon carbide fiber, and Ni to form a dense carbon layer; the Ni is evenly distributed between the dense carbon layer and the carbon In the interval formed by the fiber preform. The preparation method is as follows: first, nano-nickel powder is synthesized in a carbon fiber prefabricated body, and then nano-silicon carbide fibers are obtained by in-situ generation; finally, a finished product is obtained by depositing pyrolytic carbon. The preparation process of the invention is simple, the obtained material has excellent friction performance, and is convenient for industrial application.

The invention relates to an adjusting device (1) having at least one tappet assembly (3, 6). The at least one tappet assembly (3, 6) comprises a tappet (31, 61), at least one guide cylinder (34, 64),and a pole core (44, 74). The tappet (31, 61) is arranged in the guide cylinder (34, 64) in a movable manner along a longitudinal axis (30, 60), and a non-magnetic connection socket (43, 73) is arranged between the guide cylinder (34, 64) and the pole core (44, 74). The guide cylinder (34, 64) and the pole core (44, 74) are arranged at a distance to each other in the longitudinal axis (30, 60) bymeans of the connection socket (43, 73).

The invention discloses intelligent equipment for automatic speed control over an industrial conveyor belt. The intelligent equipment comprises a support shaft. Bearing inclined rods are inserted intothe side surface of the support shaft in a penetrating manner. Return springs are fixedly connected to the reverse sides of the two bearing inclined rods. Support springs are fixedly connected to theinner wall of a bearing wheel. A stress plate is fixedly connected to the opposite sides of the two support springs. Rotating shafts are fixedly connected to the two sides where the bearing wheel isdamaged. A transition wheel is fixedly connected to the interior of the bearing wheel through a connecting rod. Centrifugal rods are inserted in the surface of the transition wheel in a penetrating manner, hollow springs are fixedly connected to the opposite sides of the two centrifugal rods, and a water tank is fixedly connected between the two hollow springs. Concave wheels are arranged in the centrifugal rods. According to the intelligent equipment for automatic speed control over the industrial conveyor belt, through matched use of the bearing inclined rods and the stress plate, the effectof preventing the conveyor belt from being jammed when controlling the speed of the conveyor belt is achieved.

The present invention discloses a crankshaft rotation tool, comprising a locating block and a handle connected with the locating block, wherein the locating block comprises a main locating block and two auxiliary locating blocks arranged at two sides of the main locating block, each auxiliary locating block is provided with an elastic component used for being tightly contacted with an excircle of a big end of a crankshaft, and the main locating block is provided with a locating hole used for cooperating with a locating pin at the end face of the big end of the crankshaft. The present invention aims to provide the crankshaft rotation tool which is simple in structure, convenient and reliable in use, and capable of forwards and reversely rotating the crankshaft, at the same time, the present invention also provides a method for rotating the crankshaft by adopting the crankshaft rotation tool.

The invention discloses a building board cutting device. The device comprises a workbench. A framework is fixed to the top of the workbench. A hydraulic cylinder is fixedly arranged at the bottom of the framework. A cutter is fixedly arranged at the bottom of the hydraulic cylinder. Movable clamping plates are arranged in the positions, corresponding to the two sides of the bottom of the cutter, of the workbench correspondingly. Electric push rods are fixedly arranged on the outer sides of the movable clamping plates correspondingly and fixedly connected with the workbench. Each movable platecomprises a bottom plate and a top plate, wherein the top plate is arranged on the outer side of the top of the bottom plate. Caulking grooves are formed in the tops of the bottom plates, gliding feetare arranged at the four corners of the bottoms of the bottom plates correspondingly, and driving rollers are arranged in the caulking grooves correspondingly. According to the building board cuttingdevice, the width size is input through a touch display screen, accordingly, a PLC controls the whole distance of moving of the movable clamping plates pushed by the electric push rods, whatever thewidth of a board is, the driving rollers can convey the board, the electric push rods only need to be controlled to adapt to boards with different widths, application is convenient, conveying and cutting work can be performed at the same time, and the practicability is higher.

The invention discloses a device for needle core withdrawing together with vacuum suction in one-handed performance for puncture biopsy, including a tube body, a hollow puncture needle, a flexible puncture needle core, a piston rod, a rubber piston sleeve, a piston driving rod and a gear component; a division plate divides the space in the tube body into a piston rod socket and a piston driving rod socket, the puncture needle is mounted on a needle connection tube, the piston rod includes piston rod teeth, the piston driving rod includes piston driving rod teeth, the piston rod is provided with a piston rod needle core socket, the rubber piston sleeve is provided with a rubber piston sleeve needle core socket, a tube body needle core socket and tube body needle core thread holes are arranged on the tube body, tube body needle-core clamping screws are arranged on the tube body needle-core thread holes, and a needle core guide pulley device is arranged on the piston rod. Therefore, lifting and thrusting of the puncture needle can be realized, and the puncture needle core withdrawing together with vacuum suction can be carried out at the same time.

The invention provides a double-disc type movable hand brake fishing line reel. The double-disc type movable hand brake fishing line reel comprises a rocker rotating part, a body part, a line winding part and a brake part, and further comprises a body support part and a wrench part. The body support part is connected with the body part, and the wrench part is connected with the body support part. The wrench part comprises a wrench, a wrench spring, a wrench bolt, a brake drum bolt and a brake drum part, the wrench comprises a pressing part, a supporting hole part, a protruding part and a drum pin hole, the pressing part, the supporting hole part and the protruding part are connected in sequence, and the protruding part and the drum pin hole are connected. The wrench spring is connected with the supporting hole part, the wrench bolt is connected with the supporting hole part in an inserted mode, the wrench bolt is connected with the wrench spring is a penetrating mode, and the wrench spring is limited in the supporting hole part. The brake drum part and the wrench are connected through the brake drum bolt. Supporting spring lines at the two ends of the wrench spring are connected with the supporting hole part and the body support part respectively. The double-disc type movable hand brake fishing line reel is diversified, a soft brake pad is in stable contact and friction with a line reel body, damage to the line reel body can be avoided, and the product service life can be prolonged.

The invention discloses a telescopic conveying mechanism of a pipeline burying device for a water conservancy project. The telescopic conveying mechanism of the pipeline burying device for the water conservancy project comprises a fixing piece, a lead screw, a sliding block, a bottom plate, a supporting device, a pushing device and an oil outlet mechanism. According to the telescopic conveying mechanism of the pipeline burying device for the water conservancy project, the supporting device is installed at the bottom of the bottom plate, an air cylinder is installed in the supporting device, the air cylinder drives a sliding piece at the front end to be pushed out, the supporting piece at the front end can make contact with an external clamping mechanism supporting arm to stably support the external clamping mechanism supporting arm, a guide wheel is installed at the upper end of the supporting device, the guide wheel can slide at the lower end in the bottom plate, the guide wheel is matched with a moving clamping mechanism to slide and continuously support the clamping mechanism, and stability is high; and the oil outlet mechanism is installed at the right end of the top of the fixing piece, the pushing device is installed at the right end of the back face of the fixing piece, an oil outlet mechanism shell stores lubricating oil and discharges the lubricating oil into a lubricating mechanism connected with the front end of the pushing device, the lubricating mechanism makes contact with the lead screw, the lubricating mechanism achieves reciprocating motion under the action of the pushing device, and the screw rod is efficiently and stably lubricated.