93results about How to "Reduce sliding frictional resistance" patented technology

A coupling structure of a variable length shaft, comprises a pipe member having an end formed with a plurality of slits elongated in the axial direction to be capable of expanding and diminishing in diameter, an intermediate shaft spline-fitted in the end of the pipe member, and a ring member fitted on an outer periphery of the end of the pipe member, the intermediate shaft being fastened by the end of the pipe member. A holder is releasably attached to an end of the ring member to expand a diameter thereof and thereby reduce a slide frictional resistance of the pipe member against the intermediate shaft. When the holder is released, the ring member diminishes in diameter, and a fastening force of the pipe member on the intermediate shaft is increased.

The invention relates to a pure titanium two-step plastic deformation processing method in the technical field of metallic material plastic deformation; the method comprises the following steps: level-3 industrial pure titanium block is taken as the raw material, after being coated with graphite lubricant, the material is extruded on a 300KN hydraulic pressure universal experimental machine and then is subjected to rolling treatment at liquid nitrogen temperature to carry out deformation treatment on submicron crystal industrially pure titanium block, thus obtaining the superfine crystal pure titanium. The superfine crystal pure titanium of the invention features a tensile strength of 1218MPa and a specific elongation of 12.6%.

The invention provides an electric valve, which can be used to reduce the sliding friction resistance close to the compression spiral spring during the opening and closing of the valve possibly, even when the decentration of the compression spiral spring and the shaft deviation of the valve occur. A coiling end of a lower side of the compression spiral spring (24) is clipped by a spring supporting member (26), and a spherical-shaped object (40) having two parts and the spring supporting member (26) as well as the valve core (25) in a point-contact manner is disposed between the same two members. A concave part (26c) used for adjusting the valve core is formed by a spherical-shaped surface, an ellipsoid-shaped surface, and a cone-shaped surface. The deepest part of the concave part is disposed on an centre of the lower surface of the spring supporting member (26) approximately. By using the concave part (26c) used for adjusting the valve core and the spherical-shaped object (40), the sliding friction resistance can be reduced.

The invention is a manufacturing method for a kind of micron tiny crystal titanium nickel-niobium shape memorizing alloy block materials, 45%-50% titanium, 40%-45% nickel, 5%-10% niobium are melted and produced into titanium nickel-niobium alloy cast ingot, and cuts the titanium nickel-niobium alloy block material into blank, and carries on surface finish process, and paints with glass lubricate, uses isometric curved squeezing mould with 90-120 degrees channel angle, the mould cavity surface is painted with black lead lubricate, the blank and mould are heated and carries on temperature reservation, and takes them out to be squeezed at the same time, finally gets the product. The invention solves the problem that the bad plastic property of titanium nickel-niobium shape memorizing alloy in room temperature, enhances the alloy mechanical performance, and lowers the cost.

The invention provides an aluminum or aluminum alloy conductor twisting and compressing process for cables. The aluminum or aluminum alloy conductor twisting and compressing process comprises the following steps of: twisting aluminum or aluminum alloy single wires along the traction direction of the aluminum or aluminum alloy single wires; and compressing the twisted aluminum or aluminum alloy single wires by a compression roller, wherein a layer of twisting layer is formed after the aluminum or aluminum alloy single wires are twisted once and compressed by means of the compression roller, the subsequent twisting layer is twisted on the basis of the fore twisting layer, and the twisting direction of the last twisting layer is the same as that of the second last twisting layer. According to the aluminum or aluminum alloy conductor twisting and compressing process, the twisting directions of the outermost two layers of twisting layers are the same, the compression roller is combined with a nano diamond composite coating compression die, the phenomena of surface burrs of compressed round aluminum conductors, more aluminum scraps and wire fracture are prevented, the influence of alcohol which is continuously dripped for lubricating and cooling on the residual water inside or on the surface of the conductors is eliminated, the volume resistivity of the twisted and compressed cables is reduced by 0.5 to 2.0 percent, the production cost is saved, and the social benefit is higher.

A disk device according to the present invention includes a mechanism unit having a rotational drive unit for driving a disk, a clamp mechanism for clamping the disk to the rotational drive unit, and a conveying mechanism for conveying the disk toward the rotational drive unit. The mechanism unit further includes an attitude set-up member, which is directly connected to the clamp mechanism and the conveying mechanism and rotates about an axis parallel to the surface of the disk mounted in the mechanism unit, and a drive mechanism for applying a rotational force to the attitude set-up member. When the attitude set-up member rotates in a predetermined direction, the clamp mechanism is operated to cancel the clamping of the disk, and the conveying mechanism is set to be able to convey the disk by the rotational force of the attitude set-up member. When the attitude set-up member rotates in a direction opposite to the predetermined direction, the clamp mechanism is set to clamp the disk, and the conveying mechanism is set not to apply a conveying force to the disk by the rotational force of the attitude set-up member. Thereby, the load for driving the clamp mechanism and the conveying mechanism can be reduced and these mechanisms can be timely operated.

A mixed mix of a lightweight inner wall was mixed with the following weight ratio: 30-35 of ordinary silicate cement; 4-5 cooked lime; 5-10 light materials; 5--fineness is 5--The 25th purpose is 50-60 waste sand for heavy materials; 1.0 antibacterial and mold-proof composite agent provided by Guangzhou Synthetic Trade Company, 0.4 kg of antibacterial mold and mold per kilogram, 0.1 kg of water retention, 0.3 kg of diversified latex powder and diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and divergent latex powder and 0.3 kg of divergent latex powder.The composition of the air induction agent is mixed with 0.2 kg; the light collection is the fine -grade -based inorganic vival and short -hole material below 100 destinations.The diluted weight ratio during construction is the inner wall plastering mortar: water = 100: 30-50.The mortar uses waste sand in the construction waste as the mortar. It uses materials to recycled, and the crack resistance is good.The adhesion intensity meets the requirements. It can be used with lightweight walls to prevent air drums, cracking, falling off, and ensuring the quality of the project; low unit area cost; can reduce mold and bacterial breeding.

The invention relates to a nano film-embedded emulsion lubricant and mainly solves the problems about high frictional resistance of a horizontal well, serious backing pressure and poor lubricating effect of drilling fluid. The nano film-embedded emulsion lubricant comprises the following components in percentage by weight: 10 to 30 percent of modified paraffin, 3 to 11 percent of a compound emulsifier, 0.5 to 3 percent of an alkalinity modifier, 0.5 to 2 percent of nano graphite powder and the balance of water. The nano film-embedded emulsion lubricant provides an emulsion lubricant which has low fluorescence, is provided with a nano ball material and has capability of forming an anti-adhesion lubricating film between the stratum and a drilling tool; a prepared drilling fluid system has a good lubricating property; a mud cake is fine; the filter loss is low; the class of florescence is low; the nano film-embedded emulsion lubricant has excellent thermal stability and cold-resisting stability; drilling efficiency of the horizontal well is greatly improved.

A device for reducing the frictional resistance between the shield machine shield body and tunneling wall applied in the technical field of tunnel driving; the device comprises shield body, steel pipe, valve, lubricant pipeline, distributor, pipeline, first control valve, second control valve, foam system pipeline, bentonite slurry system pipeline, tunnel wall and lubricant; one end of the valve is connected with the steel pile welded in the inside of the shield body and communicated with the tunneling wall; the other end of connected with the lubricant pipeline; the lubricant pipeline is communicated with the foam system pipeline and bentonite slurry system pipeline of the shield machine through the distributor, pipeline, first control valve and second control valve; the steel pipe is communicated with the tunneling wall through the hole of the shield body; the lubricant is injected between the tunnel wall and the shield body; when needs to injecting the lubricant, the valve is opened to inject the lubricant between the shield body and the tunneling wall. The conception of the device is novel and scientific; the device for injecting the lubricant between the shield body and the tunneling wall is able to effectively reduce the sliding friction resistance between the shield body and tunneling wall.

The invention discloses a preparation method of an aluminum alloy with excellent comprehensive properties. The preparation method comprises the following steps of cutting the aluminum alloy in the cast state, rolled state or forged state into a blank, wherein the cross section of the blank can be cut into a circular shape or a square shape according to practical demands; carrying out surface machining treatment on the blank; coating a lubricant on the surface of the blank; carrying out equal channel corner extrusion treatment by using an equal channel corner extruding die which is accordant to the cross section of the blank in shape; after each extrusion treatment, carrying out the surface machining treatment again on the surface of the blank; after more than four times of the equal channel corner extrusion treatment, cleaning the surface of the blank; carrying out surface laser fusing treatment, wherein working parameters in the surface treatment can be changed through the laser fusing treatment according to practical application demands; and finally obtaining the aluminum alloy block material of which a substrate has high mechanical property and the surface has high friction property. By utilizing the preparation method, the mechanical property and the friction property of the aluminum alloy can be remarkably improved, the application range of the alloy is widened, and the requirements of practical production on the high-performance aluminum alloy are met better.

A reciprocating engine (1) includes a cylinder (2); a piston (3) reciprocating in the cylinder (2) in a direction X; a connecting rod (5) rotatably coupled at its small end portion (4) to the piston (3) through a piston pin (4a); ring grooves (7, 8) disposed adjacent to each other in the direction X and formed in a peripheral side surface (6) of the piston (3); piston rings (9, 10) respectively fitted in the ring grooves (7, 8); partitioning means (14) for partitioning an annular space (11) between the piston rings (9, 10) into a thrust side semiannular space (12) and an anti-thrust side semiannular space (13); and communicating means (16) for allowing the space (12) to communicate with a combustion chamber (15) where a fuel-air mixture is burned.

A reciprocating engine comprises: a piston ring; a piston ring which defines an annular gas chamber in cooperation with the piston ring and which is adjacent to the piston ring such that a pressure-receiving area of a side surface of a piston in the annular gas chamber becomes greater on a thrust side than on a counter-thrust side of the piston; and gas passages for allowing the annular gas chamber to communicate with the combustion chamber.

The invention relates to the field of permanent-magnet linear motors, and discloses a low-resistance coreless unilateral permanent magnet synchronous linear motor that includes a linear guide rail, wherein permanent magnets are laid on the linear guide rail at intervals in the axial direction. The motor also comprises a mover seat that is in sliding fit with the linear guide rail; a first rail anda second rail are symmetrically arranged on the linear guide rail in parallel in the axial direction. A first guide groove and a second guide groove of which the groove walls are cavities are correspondingly formed in the mover seat; at least one long steel magnet is arranged on at least one axial side wall of each of the first rail and the second rail in the vertical direction; the groove bottoms of the first guide groove, the second guide groove and the long steel magnets on the same side are connected with piezoelectric ceramics; coils are arranged in adjacent groove wall cavities, and thecoils are connected with the piezoelectric ceramics through wires. The guide effect of the guide rail is reserved; when the mover seat bears load and is pressed, the positive voltage effect of piezoelectric ceramic is used for providing current for the coil, so upward lifting force is generated on the mover seat under cutting of a symmetric magnetic field of the long steel magnets, thrust fluctuation is restrained, and the robustness of an advancing system is improved.

A drive transmission system for a sheet-like structure movable in relation to a vehicle section, with at least one flexible drive cable which can transmit tensile and/or compressive forces, and with at least one stationary dimensionally stable conduit in which the drive cable is laid. The drive cable is guided in a slidably movable manner in a flexible plastic hose which is arranged in the conduit and which is held stationarily in relation to the conduit, the plastic hose having on the inside low sliding friction with respect to the drive cable.

A film composed of grease, or a film composed of a thickener for grease, is formed on a portion of the surface of each of components constituting a bearing, the portion being opposed to a polymeric lubricant, whereby sliding frictional resistance between the bearing components and the polymeric lubricant is reduced. In the formation of the film, the assembled bearing in which the film has not yet been formed is immersed into a liquid which is obtained by diluting the grease or the thickener for grease with a solvent, and the solvent is then dried, thereby to highly reproducibly form the film of uniform thickness. In an assembled double-row self-aligning roller bearing wherein an outer race is swingable in a direction perpendicular to the center axis of the bearing, raw materials of a polymeric lubricant are poured into and solidified in two regions of an annular space between the inner and outer races.

The invention discloses a microcrystal nickel aluminum-manganese shape memory alloy block material preparation method which comprises, preparing the raw materials by the atom percentage of nickel 50%, aluminum 16-20%, manganese 30-34%, smelting under vacuum condition, obtaining nickel-aluminium-manganese alloy cast ingot, cutting the nickel-aluminium-manganese alloy into blanks, carrying out surface smoothness treatment, and coating glass lubricant, using equal diameter curved corner compression die with extruding channel angle being 90-120 degrees, coatint the die molding volume surface with graphite lubricant, subjecting the blank and die arrangement respectively to heating and heat preservation, carrying out equal diameter curved corner extrusion simultaneously after being taken out of the heating-furnace.

A wire harness includes an electrical pathway and a pipe like exterior member that covers the electrical pathway. The exterior member includes a low rigidity portion which is flelxible and a high rigidity portion which is unflexible and has a rigidity higher than the low rigidity portion, and the low rigidity portion and the high rigidity portion are successively arranged in an extending direction of the electrical pathway.

The invention discloses a six-degree-of-freedom spatial position regulating system of a rotary shaft. The six-degree-of-freedom spatial position regulating system comprises a substrate plate with a central shaft, wherein a rotary bottom plate which is matched with the central shaft is arranged above the substrate plate, and the rotary bottom plate can rotate around the Z axis; the rotary bottom plate is matched with an X bottom plate; the rotary bottom plate and the X bottom plate can slide along the X axis; a pair of first jacking oil cylinders which are perpendicular to the X bottom plate and a pair of second jacking oil cylinders are connected on the upper surface of the X bottom plate; a Y bottom plate is connected above the two pairs of the jacking oil cylinders, so that upper perpendicular lifting and pitching around the X axis are realized; a Y sliding bottom plate on a Y bottom plate can slide along the Y axis; a Y rotary mechanism, a bearing frame and a tray are connected on the Y sliding bottom plate; and the tray can be driven by the Y rotary mechanism to rotate around the central shaft thereof. The six-degree-of-freedom spatial position regulating system adopts the oilcylinders to bear main sliding, rotating and jacking drive without middle transmission links, is high in efficiency and is great in load; and through six-degree-of-freedom regulation, rotary parts such as an electric wheel are more flexible, safer and are more reliable in mounting.

The invention provides a temporary filling device for pit pavement for municipal road construction, which comprises a push rod, a blanking device, a baffle, a swing handle, a spring fixing buckle, a rotating shaft and a rotating square insertion rod, wherein four supporting frame plates are arranged in equal distance on the intermediate positions of the supporting plates around the supporting frame, and the four rows of supporting frame plates are respectively welded and fixed with the four-side inclined outer wall of the soil holding bucket; The left end of the rotating shaft is welded with aswing handle; The push rod is tilt welded and supported on the rear side of the device body; The blanking device is composed of an insertion sleeve and a plurality of earth-scraping teeth supported on the circumferential surface of the insertion sleeve by equidistant welding in an annular array, and a square shaft hole is formed through the center of the insertion sleeve, that four springs are arranged, the support frame can smoothly slide up and down with the hammering rod under the auxiliary support of the four spring rebound pushing force, the output force of the hand lifting the hammeringrod during the upper and lower reciprocating sliding hammering process is effectively reduced, and the pile hammer is convenient to carry out the hammering operation.