56results about How to "Performance matching" patented technology

The invention discloses silver paste used for a grapheme touch screen, and a preparation method thereof. The silver paste is prepared from flake-like silver powder, spherical silver powder, inorganic electric conduction additive, organic carrier, accessory ingredient and diluent of residual percentage by weight. The preparation method comprises the following steps of: firstly, preparing the organic carrier; adding the flake-like silver powder, the spherical silver powder, the inorganic electric conduction additive, the accessory ingredient and the diluent into the organic carrier; fully and evenly mixing; finally, grinding by a three-roller machine, and carrying out vacuum defoaming. The silver paste disclosed by the invention has the advantages of good overall performance, convenience in printing, good adhesion property, good bending resistance, good weather resistance, good stability and good electrical conductivity and insulating oil performance and can pass a long-time high-temperature high-moisture aging test and thermal shock tests for more than hundred times, and the requirement on the conductive silver paste by the grapheme touch screen can be satisfied.

The invention provides a wrapping machine. A vertical installation plate is arranged at the lower half portion of the wrapping machine, a fixed box body is arranged at the upper half portion of the wrapping machine, the installation plate and the fixed box body are installed on a wrapping machine frame, and a wire plate is arranged at the lower portion of the wrapping machine. By means of the wrapping machine, performance of functional devices is matched and balanced, and strap moving of straps can be monitored and adjusted timely so that running speed of the wrapping machine can be increased, and working stability and wrapping quality of the wrapping machine can be guaranteed simultaneously.

A model-based tuning method for tuning a first lithography system utilizing a reference lithography system, each of which has tunable parameters for controlling imaging performance. The method includes the steps of defining a test pattern and an imaging model; imaging the test pattern utilizing the reference lithography system and measuring the imaging results; imaging the test pattern utilizing the first lithography system and measuring the imaging results; calibrating the imaging model utilizing the imaging results corresponding to the reference lithography system, where the calibrated imaging model has a first set of parameter values; tuning the calibrated imaging model utilizing the imaging results corresponding to the first lithography system, where the tuned calibrated model has a second set of parameter values; and adjusting the parameters of the first lithography system based on a difference between the first set of parameter values and the second set of parameter values.

The invention discloses an autoclaved aerated concrete plate repairing agent and belongs to the technical field of building materials. The autoclaved aerated concrete plate repairing agent is composed of, by mass, 40-60% of coal ash, 10-30% of gypsum, 5-15% of cement, 10-30% of sand, 0.01-2.0% of fiber, 0.01-1.05 of water retaining agent and 0.01-1.5% of setting retarder. The coal ash is coal ash for silicate building products meeting JC / T, the gypsum is semi-hydrated gypsum, and the cement is universal silicate cement meeting GB. By the autoclaved aerated concrete plate repairing agent, the problem that an existing repairing agent and an autoclaved aerated concrete plate have chromatic aberration and are low in binding strength and long in setting time.

Disclosed in the present invention is a wrapping machine, a vertical installation plate (400) is arranged at the lower half portion of the wrapping machine, a fixed box body (800) is arranged at the upper half portion of the wrapping machine, the installation plate (400) and the fixed box body (800) are installed on a wrapping machine frame (700), and a wire plate (200) is arranged at the lower portion of the wrapping machine. The performances of functional devices of the wrapping machine are matched and balanced, and strap moving of straps can be monitored and adjusted timely so that running speed of the wrapping machine can be increased, and working stability and wrapping quality of the wrapping machine can be guaranteed.

The invention provides a PC alloy material and a preparation method thereof. The PC alloy material is prepared by mixing the following components in parts by weight: 100 parts of PC resin, 18-25 parts of aluminium coated modified magnesium oxide powder, 12-16 parts of surface modified aluminum oxide powder, 5-8 parts of rutile type titanium dioxide, 6-12 parts of modified graphene, 3-8 parts of a composite toughing agent, 3-6 parts of a composite flame-retardant agent, 8-20 parts of a compatilizer, 1.5-2.5 parts of a silane coupling agent, 0.5-1.5 parts of an oxidation inhibitor, 0.5-1.2 parts of an anti-dripping agent and 1.5-2 parts of an ultraviolet absorber. According to the PC alloy material, the PC resin and the various kinds of powder are fused; the powder is modified so that the powder can be fused in the PC resin fused body well; and the composite flame-retardant agent and the composite toughing agent are innovated, so that the prepared PC alloy material has good mechanical property, thermal property, optical property and electrical property, belongs to a brand-new PC alloy material, and has wide market popularization and application prospects.

The invention discloses a lightweight surface glass Ti metal plane reflector, comprising Ti metal substrate, special type glass layer and reflecting film, where the Ti metal substrate is of pure Ti (TA1,TA2 or TA3), or Ti alloy (TC1, TC2, TC3, TC4, or TC6), and is of a plate structure or of a cellular structure with lightweight design, and the Ti substrate surface is processed by machining or laser method and has roughness of 0.8-15 mu m, and the special type glass layer is 0.2-2.5mm thick and comprises SiO2 25-40wt%, PbO 50-70wt%,R2 O1-5wt%,RO 0-2wt%, and As2O3 0.2-0.5wt%, and has expansion coefficient of 80-90*10-7 / deg.C; the reflecting film is a metal reflecting film vacuum-plated on the special type glass layer and having high reflection ratio. And its advantages: properties of special type glass and Ti metal match, its structure is simple, convenient to install and debug, and applied to optical systems in various fields of spaceflight, aviation, weapon, etc.

The invention relates to a method for controlling the crystal grain size and adjusting the mechanical properties of a GH4698 disc forging. Normally, the production of GH4698 plate forgings needs to go through several processes of upsetting, die forging, secondary solid solution and aging heat treatment, among which the billet making and die forging processes include forging heating and deformation processes. Each superalloy should formulate a heating process according to its structure change characteristics during heating. The quality of the heating process can directly affect the grain size and mechanical properties of GH4698 alloy forgings. The present invention focuses on setting different heating parameters of GH4698, explains how different heating parameters affect the grain size of the structure, and purposely adjusts the grain size of the structure, so as to meet the mechanical performance requirements required by the standard.

The invention discloses a hot-rolling work roll with micron-grade tungsten carbide enhancement layers. The hot-rolling work roll comprises a hot-rolling work roll body. The surface of the hot-rolling work roll body is provided with multiple sunken pipe-like bodies. The surface of the hot-rolling work roll body is provided with the micron-grade tungsten carbide enhancement layer. The inner surface of each pipe-like body is provided with one micron-grade tungsten carbide enhancement layer. According to the manufacturing method of the hot-rolling work roll, surface treatment is carried out on the hot-rolling work roll body; then laser drilling, acid pickling and ultrasonic cleaning are carried out; the cleaned hot-rolling work roll body with the sunken pipe-like bodies is subjected to carburizing in a vacuum carburizing furnace, and a composite body with the micron-grade tungsten carbide enhancement layers is obtained; finally, aftertreatment is carried out to obtain the hot-rolling work roll with the micron-grade tungsten carbide enhancement layers. The hot-rolling work roll solves the problem that roll surface spalling of an existing hot-rolling work roll occurs under the severe working condition, the overall mechanical property, the heat-resisting property and the wear-resisting property of the composite material are improved, and the manufacturing method is simple and easy to implement.

The invention discloses a method for testing time series data of a standard unit. The method comprises the following steps that: an external clock signal CLK_IN and an external clock selection signal OSC_sel are connected with a clock self-generating module respectively; an output end CLK_out of the clock self-generating module is connected with a clock end LOGIC_clk of a test logic circuit; a test stimulus TEST_in generated by a testability structure design module is connected with the test logic circuit; and the test logic circuit outputs result data TEST_out generated according to the test stimulus TEST_in to the testability structure design module so as to determine the working correctness of the test logic circuit. By the method, the limit working frequency of the circuit is tested by designing a self-generating frequency-modulated clock so as to capture a method of key routes.

The invention discloses a production technology for a 345MPa-level hot-rolled plate roll. The 345MPa-level hot-rolled plate roll comprises the components in percentage by weight: 0.14-0.18 percent of C, 0.20-0.30 percent of Si, 1.35-1.50 percent of Mn, less than or equal to 0.10 percent of S, less than or equal to 0.20 percent of P, 0.015-0.045 percent of Als, 0.015-0.030 percent of Ti and the balance of iron and residual impurities. The production technology for the 345MPa-level hot-rolled plate roll comprises liquid iron pretreatment, RH refining, LF refining, continuous casting, heating through a heating furnace, rolling and coiling. According to the production technology for the 345MPa-level hot-rolled plate roll, the content of sulfide inclusions in the Q345B plate roll is reduced, the metallographic structure of the plate roll is improved, the matching property of the intensity and the extending rate performance is improved, the influence, which is caused by fluctuation of rolling parameters, on the performance of the Q345B plate roll is alleviated, and the stability of the quality of a product is guaranteed.

The invention discloses an Al-Fe-Cu-Mg-Be alumium alloy for an automobile wire and a preparation method thereof, and an automobile wiring harness prepared by the preparation method. The Al-Fe-Cu-Mg-Be alumium alloy for the automobile wire comprises the following components: 0.2-1.4wt% of Fe, 0.01-0.5wt% of Cu+Mg, 0.001-0.2wt% of Be, and the balance of Al and inevitable impurities. According to the invention, Fe element is added so that the mechanical strength and the tensile property of the alloy can be improved; Fe is also capable of obviously improving the high-temperature creep resistance and the fatigue resistance of the alloy; the addition of Cu+Mg is capable of improving the strength and the high-temperature creep property and the fatigue resistance of the alloy; Be is capable of improving the smelting quality of the alloy and the compactness of the surface oxide film, so that good-quality castings good in surface smoothness, high in strength and improved in ductility can be obtained; Be is also capable of improving the fluidity of the alloy so that the fluidity of the melt is improved, and can further improve the tensile strength and the limit of yielding of the alloy.

The invention discloses a hydraulic buffering protection device for an automobile damper. A piston rod assembly is arranged in a working cylinder; a limiting clamp spring is arranged in a piston rod limiting groove; a limiting base, a limiting cushion and a floating piston assembly which can move in a reciprocating way along the axial directions of the piston rod and the working cylinder are arranged on the piston rod of the piston rod assembly; the limiting cushion is in interference fit with the piston rod of the piston rod assembly, and is fixed on the end part of the limiting base; a guide sleeve and a positioning sleeve are sleeved on the piston rod of the piston rod assembly, and are fixed on the inner cavity of the working cylinder; and a reset spring is arranged between the floating piston assembly and the positioning sleeve. Due to the innovative adoption of the structure, the extreme buffering stroke is longer, the impact on damper parts at extreme positions can be effectively reduced, and the service life of the damper is prolonged. The floating piston is buffered by adopting a hydraulic small through hole throttling way, the buffering resistance can change along with the change of the speed, and the extreme damping performance can be adjusted according to different overall automobile parameters to match with overall automobile movement, so that the riding comfort is improved greatly, and meanwhile, oil in the upper cavity of the floating piston can be supplied immediately through a small through hole in the compressing process of the damper.

The invention provides a control method and device, a vehicle remote control and a vehicle. After the fingerprint of a user is collected through the vehicle remote control, a control command is generated, vehicle components are controlled according to the control command, the situation that all the vehicle components are sequentially adjusted and controlled manually by the user is avoided, and the technical problem that in the prior art, operation is complex is solved. For users, when the vehicle is driven by a certain user, control over the vehicle components can be completed through the vehicle remote control only by collecting the fingerprint of the user, so that the overall performance of the vehicle is made to better meet the requirements of the user, and accordingly convenient user operation is guaranteed while the driving experience of the user is improved.

The invention discloses a sectional travel characteristic pneumatic actuator device of a turbocharger, which includes an upper casing and a lower casing, wherein a rubber diaphragm is arranged between the upper and the lower casings, and divides a cavity between the upper and the lower casings into two cavities, namely a first cavity and a second cavity, that are not communicated; a diaphragm seat is arranged in a position inside the second cavity and near to the rubber diaphragm; an auxiliary core bar is connected onto the diaphragm seat; and springs with different elasticity coefficients are mounted on the auxiliary core bar. The sectional travel characteristic pneumatic actuator device can realize the matching of different travel characteristics, so that the performance of the supercharger is adjusted to the optimum as far as possible.

The invention relates to a work allocation method for special device detection items and the method comprises the following steps: building an employee skill database, wherein the employee skill database creates a personal file which comprises the basic information of an employee and skill proficiency information for each employee; tracking the data of each employee completing the detection behavior in the detection item, and correspondingly updating the skill proficiency information of the employee according to the data of the employee completing the detection behavior; receiving a target detection item, and inputting item parameters containing one or more pieces of necessary capability information for completing the target detection item; comparing the skill proficiency information of each employee with item parameters of the target detection item to obtain an item matching score of each employee; and setting a score threshold, screening out the employees whose item matching scores are greater than the score threshold to generate a candidate employee list, listing the disadvantages of the candidate employees, and allocating the employees of the target detection item by a manager according to the item matching scores and the disadvantages of the candidate employees.

The invention discloses a lightweight surface glass Ti metal plane reflector, comprising Ti metal substrate, special type glass layer and reflecting film, where the Ti metal substrate is of pure Ti (TA1,TA2 or TA3), or Ti alloy (TC1, TC2, TC3, TC4, or TC6), and is of a plate structure or of a cellular structure with lightweight design, and the Ti substrate surface is processed by machining or laser method and has roughness of 0.8-15 mu m, and the special type glass layer is 0.2-2.5mm thick and comprises SiO2 25-40wt%, PbO 50-70wt%,R2 O1-5wt%,RO 0-2wt%, and As2O3 0.2-0.5wt%, and has expansion coefficient of 80-90*10-7 / deg.C; the reflecting film is a metal reflecting film vacuum-plated on the special type glass layer and having high reflection ratio. And its advantages: properties of special type glass and Ti metal match, its structure is simple, convenient to install and debug, and applied to optical systems in various fields of spaceflight, aviation, weapon, etc.

The invention discloses a device and method for preparing a bimetal composite material through rapid electromagnetic induction heating. The device comprises a combining device, a heat preservation device, an automatic temperature measurement and control device, a cooling device and a traction device which are sequentially arranged from front to back. The combining device comprises a sealed box body, a mold filling device, a medium-frequency smelting furnace, a high-frequency induction heating coil and an argon protection device, and through grooves allowing steel plates to penetrate through are formed in the two longitudinal ends of the sealed box body. The lower end of the mold filling device is located in the sealed box body, a melt outlet in the lower end of the medium-frequency smelting furnace is connected with the upper end of the mold filling device, the high-frequency induction heating coil is located in the sealed box body and located on the front side of the mold filling device, and the argon protection device is mounted on the sealed box body. Compared with the prior art, the quality of the steel backing-antifriction copper alloy composite material can be effectively improved by regulating and controlling the temperature and time at different stages in the preparation process.

The invention discloses an Al-Fe-Cu-Mg-Ca alloy for an automotive wire, a preparation method thereof and a prepared automotive wiring harness, wherein the Al-Fe-Cu-Mg-Ca alloy for the automotive wire comprises the following components: 0.2-1.4wt% of Fe, 0.01-0.5wt% of Cu and Mg, 0.001-0.2wt% of Ca, and the balance of Al and inevitable impurities. The mechanical property and the tensile property of the alloy can be improved by adding an Fe element; the high-temperature creep resistance and the fatigue resistance of the alloy also can be obviously improved by the Fe; the strength and the high-temperature creep property of the alloy can be improved and the fatigue resistance can be improved by adding the Cu and Mg; the conductivity of the aluminum alloy can be improved by adding the Ca; meanwhile, the cutting property of the aluminum alloy can be improved, and removal of hydrogen in molten aluminum is facilitated.

The invention discloses a high-speed steel cold-extrusion male die provided with micron-grade tungsten carbide reinforcing layers; the high-speed steel cold-extrusion male die includes a high-speed steel cold-extrusion male die body; the surface of the male die body is provided with a plurality of sunken tubular bodies; the surface of the male die body and the inner surfaces of the tubular bodies are each provided with the micron-grade tungsten carbide reinforcing layer. A preparation method for the high-speed steel cold-extrusion male die comprises the steps: carrying out surface treatment of the male die body; then carrying out laser drilling, pickling, and carrying out ultrasonic cleaning; carburizing the obtained cleaned male die body provided with the sunken tubular bodies in a vacuum carburizing furnace, to obtain a composite body provided with the micron-grade tungsten carbide reinforcing layers; and finally, post-treating the composite body to obtain the high-speed steel cold-extrusion male die provided with the micron-grade tungsten carbide reinforcing layers. The problems that conventional high-speed steel cold-extrusion male dies are easy to permanently deform, rupture and damage are solved, the whole mechanical properties and heat resistance and abrasion resistance properties of the composite material are improved, and the preparation method is simple and is easy to implement.

The invention discloses high chrome alloy steel with a chromium carbide reinforced layer. The high chrome alloy steel with the chromium carbide reinforced layer comprises a matrix. The surface of the matrix is provided with a plurality of sunken tube-shaped bodies. The surface of the matrix and the inner surfaces of the tube-shaped bodies are both provided with the chromium carbide reinforced layers. The matrix is composed of the high chrome alloy steel. A preparation method of the abovementioned composite material comprises the following steps of (1) conducting surface treatment on the matrix; (2) conducting laser drilling, acid pickling and ultrasonic cleaning; (3) carburizing the obtained cleaned matrix with the sunken tube-shaped bodies in a vacuum carburizing furnace to obtain a complex with the micron-grade chromium carbide reinforced layer; and finally (4) conducting aftertreatment to obtain the high chrome alloy steel with the chromium carbide reinforced layer. According to the high chrome alloy steel and the method, the problems that in the prior chromium carbide reinforced steel matrix composite material, chromium carbide particles are easy to fall off and uncontrollable of size and distributing mode can be solved, the overall mechanical properties, the heat resistance and the wear resistance of the composite material can be improved and the preparation method is simple and easy to implement.

The invention discloses an Al-Fe-Cu-Mg-Sb aluminum alloy for an automotive wire, a manufacturing method of the aluminum alloy, and a wiring harness made of the aluminum alloy. The Al-Fe-Cu-Mg-Sb aluminum alloy for the automotive wire comprises the following ingredients in percentage by weight: 0.2-1.4wt% of Fe, 0.01-0.5wt% of Cu and Mg, 0.001-0.2wt% of Sb, and the balance of Al and inevitable impurities. The mechanical strength and the tensile properties of the alloy can be improved by adding an Fe element; the high temperature creep resistance also can be obviously improved by Fe; the anti-fatigue performance of the alloy is improved; the strength and the high-temperature creep properties of the alloy can be improved by adding Cu and Mg; the anti-fatigue performance can be improved; the yield limit of the alloy can be improved by adding Sb; meanwhile, the alloy has superplasticity, so as to be drawn into a very thin alloy wire.

The invention discloses an Al-Fe-Cu-Mg-Sb aluminum alloy for an automotive wire, a manufacturing method of the aluminum alloy, and a wiring harness made of the aluminum alloy. The Al-Fe-Cu-Mg-Sb aluminum alloy for the automotive wire comprises the following ingredients in percentage by weight: 0.2-1.4wt% of Fe, 0.01-0.5wt% of Cu and Mg, 0.001-0.2wt% of Sb, and the balance of Al and inevitable impurities. The mechanical strength and the tensile properties of the alloy can be improved by adding an Fe element; the high temperature creep resistance also can be obviously improved by Fe; the anti-fatigue performance of the alloy is improved; the strength and the high-temperature creep properties of the alloy can be improved by adding Cu and Mg; the anti-fatigue performance can be improved; the yield limit of the alloy can be improved by adding Sb; meanwhile, the alloy has superplasticity, so as to be drawn into a very thin alloy wire.

The invention discloses a natural gas engine test system for exhaust gas-fuel catalytic reforming and catalyst regeneration, and a control method. Partial exhaust gas waste heat is utilized to carry out an exhaust gas reforming hydrogen production reaction, the hydrogen-rich mixed gas generated by reforming is introduced into an engine to explore an influence rule of working parameters of a reformer on the engine performance and emission, and the matching of the reformer and the engine performance is realized. Meanwhile, for the catalyst deactivation problem in the reformer, a catalyst can bereduced online; in addition, after an experiment is finished, N2 is inflated into the reformer by a rack, an inert atmosphere is formed to protect the catalyst, and the problem of the catalyst deactivation caused by oxidation of residual exhaust gases inside the reformer in the cooling process is avoided.

The invention provides a resin composition and a preparation method of the resin composition. The resin composition comprises a component A, a component B and a component C, wherein the component A comprises the following substances in parts by weight: 70-200 parts of vinyl ester resin composition, 0-20 parts of active diluting agent, 0-50 parts of non-rubber toughening agent, 0-30 parts of rubber toughening agent, 0-20 parts of catalyst, 0-5 parts of ultraviolet absorber, 0-5 parts of light stabilizer, 0-5 parts of antioxidant, 0-5 parts of coupling agent and 0-50 parts of thixotropic agent; the component B comprises the following substance in parts by weight: 1-100 parts of peroxide initiator; the component C comprises the following substances in parts by weight: 120-500 parts of quartz sand and 0-200 parts of rubber particle; and the vinyl ester resin composition comprises vinyl ester resin polymer. The resin composition is matched with a CA mortar layer in performance and is previously prepared, a line with subgrade differential settlement of being over 30 mm can be conveniently and quickly maintained within actual maintenance skylight time, and the original line track structure is restored after the skylight is finished, and the traffic safety is guaranteed.

The invention discloses a method for group matching of power lithium-ion rechargeable batteries. The method comprises the following steps: one-step charge and discharge detection is conducted to the power lithium-ion rechargeable batteries and the batteries with capacities larger than lower limit capacity are taken as acceptable batteries; the acceptable batteries are charged to a state with 50-90 percent of rated capacity and the rechargeable batteries with acceptable voltage drop are sorted; the obtained acceptable batteries are fully charged and are connected in parallel for at least 4 hours to enable the voltage difference between any two rechargeable batteries to be less than or equal to 1mV; the obtained rechargeable batteries are connected in series to discharge, the voltage of each rechargeable battery during discharge is acquired and recorded, and the discharge is stopped when the voltage of any battery reaches cutoff voltage; and a voltage difference standard is set according to the number of series batteries required for group matching and the battery voltage at the moment of discharge cutoff, and the batteries with voltage differences within the preset range are matched into a group. Since the parameters of the batteries are measured and sorted under the simulated battery use conditions and the single rechargeable batteries with close characteristics are sorted, the quality of the group matching is improved.

The invention discloses a sectional travel characteristic pneumatic actuator of a turbocharger. The sectional travel characteristic pneumatic actuator comprises an upper housing and a lower housing, wherein a rubber diaphragm is arranged between the upper housing and the lower housing; a cavity between the upper housing and the lower housing is divided into two hollow chambers through the rubber diaphragm, and the two hollow chambers are respectively a first hollow chamber and a second hollow chamber which are not intercommunicated; the second hollow chamber is internally provided with a diaphragm seat at a position close to the rubber diaphragm; a mandrel is connected to the diaphragm seat; two springs with different elastic coefficient are arranged on the mandrel, which are respectively an internal spring and an external spring; the external spring is sleeved outside the internal spring; and an internal spring locking mechanism is arranged on the mandrel. With the adoption of the sectional travel characteristic pneumatic actuator of the turbocharger provided by the invention, various travel characteristics can be matched, therefore, the performance of a turbocharger can be adjusted to achieve the best state as far as possible.

The invention relates to the technical field of power communication and particularly relates to an optical phase conductor (OPPC). The optical phase conductor is used for the updating reconstruction engineering of a 10kV rural power line so as to finish the construction of a communication channel required by a matched system for power utilization information acquisition and failure indication. The exterior of an optical fiber unit is wrapped by a hard-drawn aluminum wire, and a conductor shielding layer and an insulating layer are sequentially arranged outside the hard-drawn aluminum wire. The optical phase conductor has the advantages that power transmission and optical fiber communication can be combined; resources are saved; when the OPPC is used for the updating reconstruction of an original line, the original line is free from a hidden danger caused by the addition of an extra load; the corrosion resistance is high, and the service life is long; the thermostability is great; the hidden accident dangers such as lightning stroke strand breakage and overheat short-circuit current cannot occur; and an extra load cannot be added to a line pole tower. Besides, through the utilization of the power transmission line, the construction of the communication channel required by the system for power utilization information acquisition and failure indication is finished, and the intelligent reconstruction of a rural power grid can be finished.

The invention discloses a sectional travel characteristic pneumatic actuator device of a turbocharger, which includes an upper casing and a lower casing, wherein a rubber diaphragm is arranged between the upper and the lower casings, and divides a cavity between the upper and the lower casings into two cavities, namely a first cavity and a second cavity, that are not communicated; a diaphragm seat is arranged in a position inside the second cavity and near to the rubber diaphragm; an auxiliary core bar is connected onto the diaphragm seat; and springs with different elasticity coefficients are mounted on the auxiliary core bar. The sectional travel characteristic pneumatic actuator device can realize the matching of different travel characteristics, so that the performance of the supercharger is adjusted to the optimum as far as possible.

The invention discloses silver paste used for a grapheme touch screen, and a preparation method thereof. The silver paste is prepared from flake-like silver powder, spherical silver powder, inorganic electric conduction additive, organic carrier, accessory ingredient and diluent of residual percentage by weight. The preparation method comprises the following steps of: firstly, preparing the organic carrier; adding the flake-like silver powder, the spherical silver powder, the inorganic electric conduction additive, the accessory ingredient and the diluent into the organic carrier; fully and evenly mixing; finally, grinding by a three-roller machine, and carrying out vacuum defoaming. The silver paste disclosed by the invention has the advantages of good overall performance, convenience in printing, good adhesion property, good bending resistance, good weather resistance, good stability and good electrical conductivity and insulating oil performance and can pass a long-time high-temperature high-moisture aging test and thermal shock tests for more than hundred times, and the requirement on the conductive silver paste by the grapheme touch screen can be satisfied.