31results about How to "Consistent friction" patented technology

The invention relates to an oil-resistant paper-base friction plate and a production method thereof. The oil-resistant paper-base friction plate comprises the following materials in parts by weight: 0.8-1.2 parts of compounding agent, 2.5-5.5 parts of sulfur, 44-73 parts of filler, 20-28 parts of adhesive and 10-14 parts of butadiene-acrylonitrile rubber. The method comprises the following steps: S101: plastifying the butadiene-acrylonitrile rubber in a Banbury mixer; S102: adding the compounding agent, sulfur, filler, adhesive and plastified butadiene-acrylonitrile rubber into the Banbury mixer, and compounding to form the compounded rubber; S103: moving the compounded rubber into an open rubber mixing mill to form a rubber plate; and S104: winding a film outside the rubber plate for isolation. The production method can ensure the oil resistance of the friction material. The frictional property of the friction plate subjected to oil impregnation is the same as before oil impregnation, thereby simultaneously ensuring the stable frictional property and higher friction factor of the paper-base friction plate.

The invention relates to the field of wood-plastic production technology, in particular to a wood-plastic door plank micro-foaming forming device and using method thereof. The wood-plastic door plankmicro-foaming forming device comprises an extruder and an extruding mould. The extruding mould comprises a converging module. Core rods are arranged inside the converging module. A separation blade isvertically arranged between the core rods. The upper end face and the lower end face of the separation blade are fixedly connected with the converging module. The device is novel in structure, a wood-plastic material can be cut into a plurality of material units through the separation unit, in this way, the material units do not affect one another, flow crossing among the material units is avoided, balanced material flow and consistent material pressure of the material units are guaranteed, and stable friction force between the material units and the core rods is guaranteed.

The invention discloses a diffusion welding method for a TA2 material micro-channel radiator. The diffusion welding method comprises the following steps: carrying out etching processing on an annealed-state high-precision plate with a roughness of less than Ra0.4; assembling a plurality of stacked micro-channel etching plates and side plates into a micro-channel core body, and then assembling the micro-channel core body on a positioning rod; placing a layer of graphite paper on each of the uppermost layer and the lowermost layer of the assembled micro-channel core body; ensuring that the center of the core body is consistent with the center of a pressurization mechanism of diffusion welding equipment; when the vacuum degree reaches 6*10<-3> Pa, starting heating; pre-pressing a pressing force of 0.5 MPa on the micro-channel core body; when the temperature reaches 890 +/-5 DEG C, adjusting the pressing force to 3.5 Mpa, and carrying out heat preservation for 180 min at the temperature; after heat preservation is finished, keeping the pressing force of 3.5 Mpa for cooling; and when the temperature of the core body is cooled to 400 DEG C, starting an argon filling cooling mode. According to the invention, the problem of diffusion welding when a TA2 titanium alloy micro-channel radiator comprises hundreds of layers of micro-channel plates is solved.

The invention provides a novel multi-shank grinding and polishing machine, which includes a control system, a machine base, several tool clamping tables, a spindle box, a two-dimensional electric displacement platform, and an abrasive belt grinding mechanism. The abrasive belt grinding mechanism includes a fixed The belt wheel bracket on the base, the driving belt wheel fixed on the belt wheel bracket, the driving belt wheel driver fixed on the belt wheel bracket, the driven belt wheel fixed on the belt wheel bracket belt pulley, the abrasive belt matched with the driving abrasive belt wheel and the driven abrasive belt wheel, and several booster wheels that increase the frictional force generated by the abrasive belt on the handle of the knife, and the several tool clamping stations Located between the driving grinding wheel and the driven grinding wheel, the several booster wheels are located between the driving grinding wheel and the driven grinding wheel. Compared with the prior art, the present invention changes the contact between the abrasive belt and the handle from line contact to surface contact, greatly improving the polishing efficiency, and the booster wheel makes the polishing effect of the abrasive belt on each handle consistent.

A warp constant tension device for a ribbon loom comprises a frame, a warp beam rotatably arranged on the frame, a tension stand, a regulating mechanism and two tension ropes arranged symmetrically, wherein the warp beam comprises two disks with the circumferential side provided with grooves, the two disks are fixedly connected through a winding post, the two tension ropes wind the upper ends and the lower ends of the left side and the right side of the tension stand respectively to be wound in the grooves of the two disks; the regulating mechanism can be arranged on the tension stand in a vertically movable mode; a plurality of warps are wound on the winding post; and the plurality of warps are pulled above the regulating mechanism and butted against the upper side of the regulating mechanism and then pulled to the ribbon boom. The warp constant tension device for the ribbon loom can guarantee tension balance at both ends of the warp beam, and achieve constant tension of warps of the warp beam, thus stabilizing quality of woven fabric ribbons. In addition, positions of supporting points of warps can be changed under the vertical action of the regulating mechanism; therefore fine adjustment of constant tension of warps can be achieved. Compared with the prior art, the accuracy is remarkably increased.

The invention discloses a transportation device for a wood movable-type printing plate. According to the technical scheme, the transportation device is characterized in that a first storage groove, asecond storage groove and a third storage groove are included, wherein a storage box surrounds the outer portions of the first storage groove, the second storage groove and the third storage groove; storage cavities for containing movable types and filling blocks are evenly distributed in the first storage groove; the first storage groove is internally provided with a circular groove for containing inkstone, a first square groove for containing a transverse brush, a second square groove for containing a vertical brush and a three-dimension groove for containing a plurality of partition strips;the third storage groove is provided with a containing groove for containing wood boards, a telescopic plate is arranged in the containing groove, the face, opposite to the containing groove, of thetelescopic plate is provided with a telescopic spring, one end of the telescopic spring is fixedly connected with the telescopic plate, and the other end of the telescopic spring is fixedly connectedwith the groove wall of the containing groove; the position, close to the end portion, of the telescopic plate is provided with an auxiliary device for assisting telescopic plate sliding; and by meansof the device, a wood movable-type printing tool can be protected against damage in the transportation process.

The invention provides a one-way clutch and a crank-type continuously-variable transmission. A peripheral part of an end face of a roller applying a force in an axial direction through an axial spring is preventing from being engaged with a side surface of a maintaining frame. Because a frictional force acting on a first end face (25a) of the roller (25) is consistent with a frictional force acting on a second end face (25b) of the roller (25), thereby preventing the roller (25) from being inclined because of the imbalance between the frictional forces of the first and second end faces (25a, 25b) during the movement from a reference point and an engagement point, preventing the inclined roller (25) from being worn caused by the contact of the first and second end faces (25a, 25b) of the roller (25) with a first side surface (36a) and a second side surface (36b) of an inner ring (36). Moreover, the roller (25) can be enabled to be smoothly engaged between an outer peripheral surface of an internal part (23) and an inner peripheral surface (22a) of an external part (22), thereby improving the joint responsiveness of the one-way clutch (21).

The invention relates to a chassis dynamometer. The device comprises a frame, a driving roller and a driven roller, one end of the driving roller in the length direction is in transmission connectionwith a power device; wherein the other end of the frame is fixedly connected with a chain wheel, the outer side of the chain wheel is meshed with a chain, the driven roller is in transmission connection with the driving roller through the chain, a lifting device is arranged between the driving roller and the driven roller and comprises a hydraulic cylinder and a lifting plate which are fixed in the frame, and one end of a piston rod of the hydraulic cylinder is fixedly connected with the lifting plate. An air drying device is arranged on one side of the frame and comprises an air blower and asupporting plate arranged above the air blower, the air blower is fixed in the frame and faces the supporting plate, the supporting plate is detachably and fixedly connected with the frame, and a plurality of ventilation openings are formed in the supporting plate. The strong air exhaust effect of the air blower can blow-dry the tire with water such that the friction force of the wheel is consistent with that during drying, and the detection precision is improved.

The invention discloses an adjustable clamping plate platform for wood sanding, which comprises telescopic supporting legs and a smooth table top, wherein a plate feeding supporting frame, a grindingbelt supporting frame and an outgoing plate discharging supporting frame are arranged on the smooth table top, an incoming plate feeding supporting frame is provided with a fixed flat rod and a sliding flat rod, and each of the fixed flat rod and the sliding flat rod is provided with a wheel hub, a vacuum tire and a first driven belt wheel by means of a wheel shaft; belt rollers are erected between two vertical plates of the grinding belt supporting frame, foaming rubber belts are wound around the upper belt rollers, grinding belts are wound around the lower belt rollers, and the belt rollersare connected with a second driven belt wheel; the first driven belt pulley is connected with a first driving belt pulley, and the second driven belt pulley is connected with a second driving belt pulley; and the vacuum tire is communicated with an air pump by means of an air pipe. The adjustable clamping plate platform adopts the vacuum tire for extrusion as a plate conveying and clamping mechanism, adopts reverse extrusion grinding of the grinding belts and the foaming rubber belts, and achieves the processes of two-way extrusion material conveying and two-way extrusion reverse grinding; andadjustable clamping plate platform has small extrusion force, large friction force and high grinding efficiency.

A wave-shaped spring is characterized in that the number of holes (2) of a wave spring (1), namely the number of wave peaks, can be determined as per the number of steel wires; an outer ring convex arc (3) and an inner ring convex arc (4) corresponding to each hole (2) are formed on the two sides of the corresponding hole (2); the outer ring convex arcs (3) are connected with outer ring arcs (6); the inner ring convex arcs (4) are connected with inner ring arcs (5); the wave spring (1) is wave-shaped along the periphery; due to the characteristics of the stressed wave spring (1), when one steel rope or multiple steel ropes of the group of steel ropes are subjected to oversize or underside force, the wave spring (1) deforms correspondingly; during deformation, the force is transmitted to other steel ropes to cause corresponding change to other steel ropes; therefore, when certain force is applied to the steel ropes, the wave spring (1) can uniformly distributes the force to each steel rope, the stress on the steel ropes can be balanced, and the purpose that all ropes in the group of steel ropes are subjected to equivalent force can be realized.

The invention discloses a radial tire material coiling and conveying device. The device comprises a conveying belt and a coiling device arranged on a conveying line of the conveying belt and used forbearing materials. The coiling device comprises a containing device used for containing the materials, a detecting device used for detecting the diameter of a material roll and an adjusting device connected with the detecting device and used for changing the friction force of the material roll. According to the device, it is guaranteed that the friction force of the material roll is kept consistent in the operation process by adjusting the friction force between the material roll and the conveying belt, the material folding phenomenon is avoided, and meanwhile, a cloth liner roll is controlled, so that the tension difference of a cloth liner is avoided, the materials are located in the center of the cloth liner, and waste materials are reduced.

The invention discloses an electro-hydrostatic brake control device for an unmanned aerial vehicle and a dynamic pressure maintaining method, belongs to the technical field of aircraft brake control systems, and adopts an integrated electro-hydrostatic brake technology, a piston, a hydraulic cylinder structure and a dynamic pressure maintaining strategy to realize rapid and accurate control of the brake pressure of the unmanned aerial vehicle. The functions of slow braking and snub braking are achieved; the characteristics of long-time pressure maintaining and low power consumption are realized; the device has the advantages of short pressure building time and high in-place pressure precision; the response time of the novel brake control device is shortened by more than 30% compared with that of a previous pump type hydraulic brake control device. A traditional EHA hydraulic transmission structure is abandoned, and the problems that an existing electro-hydrostatic actuator is large in size, poor in maintainability, low in reliability and the like are effectively solved.

The invention relates to the technical field of assembly of conveyers and particularly relates to a conveyer installation assisting device. The conveyer installation assisting device comprises a support mechanism; the support mechanism is connected with two inverted first U-shaped brackets; a second permanent magnetic plate capable of sliding up and down is connected between two vertical plates ofthe first U-shaped brackets; the middle of the top of the second permanent magnetic plate is rotationally connected a vertically-arranged threaded shaft; a first pressure sensor is arranged between asecond U-shaped bracket and the first permanent magnetic plate; the surface, far away from a dynamic telescopic cylinder, of a top plate is provided with a second pressure sensor; and the first pressure sensor and the second pressure sensor are each electrically connected with a pressure displayer. According to the conveyer installation assisting device, a shaft base is pressed on a rack by virtue of magnetic force; the values of the pressure applied from the two ends of the shaft base to the rack are ensured to be the same by virtue of the pressure sensors so that friction force between therack and the shaft base is kept consistent basically, thus the accuracy and consistency of tensioning force at the two ends in installation of a belt conveyer are greatly improved; and meanwhile the installation efficiency is improved.