73results about How to "Uniform service life" patented technology

The invention discloses a wind farm economy-based active power adjusting method and system. The method comprises the following steps: (A) dividing controllable priorities of all wind generator sets in a wind farm cluster according to the electricity price, and setting the wind generator set with low electricity price to be preferentially controlled high-priority set; (B) when an execution cycle T1 is reached, distributing stand-alone expected output power to all wind generator sets in the current controllable priority; (C) setting the minimum expected output power, and labeling the sets as controllable shutdown sets when the expected output power of the sets reaches the value; and (D) when an execution cycle T2 is reached, determining the shutdown order of the controllable shutdown sets according to the accumulated use frequencies of grid-connected switches of the sets and preferentially shutting down the set of which the grid-connected switch is low in accumulated use frequency. Active power adjusting control is carried out based on the wind farm economy; and the maximum profits of the wind farm and the minimum capital investment into wind turbine components can be achieved.

The invention relates so an impregnated tooth applicable to a high-abrasiveness hard formation and a preparation method of the impregnated tooth. The impregnated tooth comprises an impregnated matrix and a diamond which is arranged in the impregnated matrix in an impregnated mode. The impregnated matrix comprises, by weight, 60% to 70% of tungsten carbide, 10% to 25% of cobalt powder, 5% to 10% of copper powder, 2.5% to 5% of nickel powder and 2.5% to 5% of manganese powder. The preparation method comprises the steps that the components for preparation of the impregnated matrix are evenly mixed, and then granulation is carried out on the mixture and diamond particles which are wetted by a glycerol alcoholic solution so that balls can be formed, wherein the concentration of the diamond ranges from 110% to 150%; the prepared balls are placed into a mold to be processed through sintering forming so that the impregnated teeth applicable to the high-abrasiveness hard formation can be obtained, wherein the sintering temperature ranges from 1080 DEG C to 1100 DEG C, the sintering pressure ranges from 40 MPa to 50 MPa, and the temperature holding time ranges from 5 min to 10 min. The impregnated tooth is high in strength, abrasive resistance and drilling efficiency, and long in service life.

The present invention relates to crusher technology, and is especially feeding mechanism of crusher. The feeding mechanism includes one feed port with tilted tangent flow passage comprising casing and sliding plate, feed baffle capable of masking the tangent flow passage, horizontal cylindrical casing in the end of the tangent flow passage possessing two axial opening separately to the end of the tangent flow passage and the crushing chamber; and one feeding wheel inside the cylindrical casing and comprising central shaft for power input and radial blades on the shaft. During operation, the central shaft rotates in homogeneous speed for homogeneous feeding to form thin-layer linear feeding flow, and the material may obtain high kinetic energy for fast crushing. The present invention may be applied in hammer crusher.

The invention discloses a wing variable pitch type vertical shaft wind generating set. A hinge device and a spring device are arranged between each fan blade unit and a corresponding rotary sleeve spindle, the fan blade units and the rotary sleeve spindles can rotate vertically and relatively through the hinge devices, when strong wind comes, the fan blade units lift and rotate to be under the suspension and fast turning state along with the increasing of the rotation speed of wind wheels, the stability is better, the stability of the wing variable pitch type vertical shaft wind generating set is not affected by the increasing of the wind speed, the output power is stable, and the service life of an electric generator is prolonged. The spring devices are arranged on the rotary sleeve spindles and located below the hinge devices and can assist in adjusting the included angle between supporting rods and the horizontal plane, and fan blades are stressed evenly when a wind wheel set rotates at a high speed. Each fan blade unit comprises fan blades, connection rods and two or more supporting rods which are parallel, wherein one ends of the supporting rods are fixedly connected with the connection rods, and the other ends of the supporting rods are hinged to the fan blades. When the fan blades are pushed to rotate by the wind power, the fan blades rotate relative to the supporting rods, the output power is adjusted, and the output power is stable.

The invention relates to a method and device for writing data in a memorizer and an intelligent card. The method includes the steps of selecting a power failure page from two or more pages according to a verification value to serve as a backup page, judging whether the backup page needs to be replaced according to the number of write-in times of the backup page, if it is judged that the backup page needs to be replaced, selecting a replacing page from two or more pages according to the number of write-in times, writing data of the replacing page in a data unit of the backup page, updating an information unit of the backup page, making the replacing page serve as a new backup page, writing data, needing to be written in, in a data unit of the new backup page, and updating an information unit of the new backup page, and if it is judged that the backup page does not need to be replaced, writing data, needing to be written in, in the data unit of the backup page, and updating the information unit of the backup page. The method and device are used for prolonging the service life of the memorizer and can conduct power failure protection when data are written in.

The invention relates to a control method for staggered defrosting of multiple units. The control method for the staggered defrosting of multiple units comprises the following steps of presetting the defrosting cycles of N units, respectively being T+(1-1)a, T+(2-1)a...T+(N-1)a; electrifying the N units for running, correspondingly presetting one defrosting cycle for each unit, and enabling the N units to separately carry out defrosting according to respective defrosting cycles; and when the duration that the units run according to the preset defrosting cycles reaches a rotating cycle K, presetting the defrosting cycles corresponding to the N units again according to the N defrosting cycles, wherein the former preset defrosting cycles of at least two units are not equal to the corresponding defrosting cycles reset in this time. The control method for the staggered defrosting of multiple units can regulate the accumulative defrosting duration of the units in a balancing manner under the condition of meeting the heat supply requirements of users, and at the same time, can regulate the running duration of each unit in a balancing manner.

The invention discloses a display panel, a preparation method and a display device, the display panel comprises a main display area and an auxiliary display area, and the boundary of the main displayarea and the auxiliary display area is a folding line; the display panel including a functional layer, the functional layer comprises an anode layer, a hole transport layer, a light emitting layer, anelectron transport layer and a cathode layer which are stacked in sequence. The proportion of the longitudinal section of the electron transport layer of the main display area to the longitudinal section of the functional layer of the main display area is larger than the proportion of the longitudinal section of the electron transport layer of the auxiliary display area to the longitudinal section of the functional layer of the auxiliary display area. The end, away from the folding line, of the main display area and the end, away from the folding line, of the auxiliary display area are in thelongitudinal section direction, the service life of the main display area is effectively prolonged, the service life of the main and auxiliary display areas is balanced, and brightness difference ofthe main and auxiliary display areas after long-term use is avoided.

The invention discloses a wear-resistant lining plate for a large self-grinding machine / a large semi-self-grinding machine. The wear-resistant lining plate is characterized in that the bottom platesof a feeding end inner ring lining plate body, a feeding end middle ring lining plate body and a feeding end outer ring lining plate body of the wear-resistant lining plate are provided with first lifting strips which are increased in height correspondingly, and are provided with long strip bosses for increasing the wear resistance of the bottom plates correspondingly; a feeding end barrel liningplate body, a middle section barrel lining plate body and a discharging end barrel lining plate body are provided with second lifting strips with the sections of asymmetric structures; an outer ring ore pulp lifter is provided with large arc-shaped third lifting strips, long bolts and short bolts; a grid plate is provided with large arc-shaped fourth lifting strips, and an inner ring ore pulp lifter is provided with fifth long lifting strips and sixth short lifting strips which are arranged at intervals; and a discharging device is of an integral structure and is provided with seventh short lifting strips. According to the wear-resistant lining plate, the problem that in the prior art, the service life of a feeding end lining plate body is relatively low, the discharging efficiency of a grinding machine is low and the number of the lining plates is too large are effectively solved.

The invention relates to a piston applied in a reciprocating piston type engine. The piston (2) defines a working chamber (5) and can move inside a cylinder sleeve (3). A piston ring group (9) is applied for covering a gap (13) between the piston and the cylinder sleeve. The piston ring group comprises a plurality of piston rings (6, 7, 8) arranged in a front-back manner and respectively equipped inside a corresponding piston ring groove (10, 11, 12) of the piston (2). The piston rings can be loaded by the air inside the working chamber. In this way, a significant decrease in power loss and a basic balance in the service lifetime of each piston ring are realized. The gap between the piston and the cylinder sleeve is sealed by one piston ring farthest away from the working chamber in an airtight way. Controllable leakage is allowed on piston rings (6, 7) in front of each piston ring arranged farthest away from the working chamber. The pressure of the leaked air is reduced by the expansion of at least one expansion chamber (17) before the air reaches the piston ring arranged farthest away from the working chamber.

The invention discloses a depressed center flat car for urban rail vehicle maintenance, and relates to the technical field of rail vehicles. The depressed center flat car comprises a chassis, a wind braking device, a manual braking device, an electrical device, a vehicle coupler buffering device and a bogie, wherein the electrical device arranged on the end part of the chassis comprises an illuminating element and a power source of the illuminating element; the chassis comprises an end beam, a sleeper beam, a drawing beam, grids, a floor, a lower cover plate and two opening covers or more; the drawing beam of a knife-holder-type hollow frame structure comprises a dovetailed external end part, a middle part and a bending part; the dovetailed external end part is connected with the vehicle coupler buffering device; the middle part is connected with the sleeper beam; the bending part is connected with the grids; the lower end surface of the middle part is higher than lower end surfaces of the external end part and the bending part; each of the sleeper beam, the drawing beam and the grids is internally and vertically provided with web plates at intervals. The depressed center flat car disclosed by the invention has the advantages that the features of simple structure, convenience in use, large loading capacity, high overall strength, high applicability and the like are obtained; the flat car is suitably applied to the operation on standard gauge lines, and is mainly used for the maintenance of subway rail lines; cargoes loaded by the flat car are equipment mainly used for maintaining the subway rail lines.

The invention discloses a laminated filter pressing device. The device comprises a cloth stacking assembly, a sludge distribution device and a squeezing device, the squeezing device comprises a pressing head capable of moving vertically and a lifting supporting plate located in a squeezing frame below the pressing head and capable of moving vertically. The cloth stacking assembly comprises a clothstacking rack and a cloth stacking device which can be installed on the cloth stacking rack in a reciprocating mode through a first telescopic driving device. The cloth stacking device comprises a frame body, an upper filter cloth operating assembly, a lower filter cloth operating assembly, upper filter cloth and lower filter cloth, wherein the upper filter cloth operating assembly and the lowerfilter cloth operating assembly are installed on the frame body, the upper filter cloth is arranged on the upper filter cloth operating assembly, and the lower filter cloth is arranged on the lower filter cloth operating assembly, so that the upper filter cloth and the lower filter cloth are correspondingly operated through the upper filter cloth operating assembly and the lower filter cloth operating assembly to clamp materials to move towards the squeezing device, and the first telescopic driving device can drive the cloth stacking device to move towards the squeezing device. The laminated filter pressing device aims to solve the technical problem of low sludge dewatering efficiency of a filter pressing mode in the prior art.

The invention relates to a method for controlling multiple units to enter a preset state in a staggered manner. The method comprises the following steps: presetting target temperatures, which are R+ (1-1) b, R+ (2-1) b and the like, R+ (M-1) b respectively, of M units; enabling each unit to correspond to the corresponding target temperature in a running process of the M units, and enabling the units to enter a preset running state respectively according to the respective target temperatures; and presetting the target temperatures corresponding to the M units again according to the M target temperatures when running time of the units at the preset target temperatures reaches a rotating period P, wherein last preset trigger temperatures of at least two units are not equal to the reset trigger temperatures corresponding to the units. By the method for controlling the multiple units to enter the preset state in the staggered manner, under the condition that heating demands of users are met, the running time of the units is adjusted in a balanced manner, resource waste is reduced, and the service lives of all the units are balanced as much as possible.

The invention provides an intelligent cooling control method for a transformer. The method comprises the steps of setting an operation temperature range for achieving the maximum utilization value of the transformer, taking the temperature range as a control target of a cooling system, enhancing the cooling intensity when the load of the transformer is increased and the temperature is increased, and weakening the cooling intensity when the load of the transformer is reduced and the temperature is reduced. Dynamic control over the cooling system is achieved, what is guaranteed is that the transformer is within the operating temperature range, meanwhile, resource waste is reduced, the service life of each cooling device is balanced, and the utilization value of the cooling system is maximized. Meanwhile, before the load of the transformer is increased, the cooling intensity of the cooling system is increased in advance, for example, the flow speed of fluid is increased, the situation that when the load is suddenly increased, the hot-spot temperature of the winding exceeds the highest temperature borne by the normal operation service life, and consequently the service life of the winding is lost is prevented, and the maximum utilization value of the transformer is achieved on the premise that the normal service life is guaranteed.

The invention discloses an installation of a new structure of an air-gun combined dredging machine, comprising a conical stock bin with larger upper part and smaller lower part, an air gun is arranged outside the stock bin, the air nozzle of the air gun is obliquely arranged downwards in the stock bin, the inner wall of the stock bin is provided with a dredger and a hydraulic cylinder which is arranged above the dredger, and the piston of the hydraulic cylinder and the top end of the dredger are connected in a driving mode; the air gun and the dredger are installed in the same stock bin and share one control cabinet; when the stock bin is blocked, a feed breaking signal displays, the air gun begins to work, and the dredger begins to carry out cyclic motion up and down after one second, until the feed breaking signal disappears; thus, the optimum blockage cleaning and dredging effect is performed on blocking phenomenon, such as materials jamming, bin wall bonding, bridging and the like; the effect of the invention is multiplied many times over that of single operation for the air gun or the dredging machine, and the invention is especially suitable for the dredging operation for blockage of damp or easily-bonding materials.

The invention discloses an air compressor performance identification and group preference joint control system and method. Multiple types of sensors are adopted to test the vibration signal, current signal, temperature signal and acoustic emission signal of each air compressor in a group; the multi-sensing information fusion technology is adopted to fuse the vibration signal, current signal, temperature signal and acoustic emission signal in the operating process of the air compressor to effectively identity the current performance of each air compressor; and according to the high and low degree of the performance of each air compressor, the start-stop preference sequence and the operating duration of each air compressor, equalizing regulation of the performance of each air compressor in the group is ensured, and the situation that long-term operation of a single air compressor to cause that the performance of the air compressor is seriously lowered and the service life is seriously shortened is avoided, so that the working efficiency of the air compressor group is greatly improved and the service life of each air compressor is greatly prolonged.

The invention discloses a processing method of catalytic diesel oil. A catalytic diesel oil material is cut into a light component and a heavy component; the light component is subjected to hydrofining and hydroupgrading reactions and gasoline and diesel oil components are obtained; the obtained heavy component is subjected to hydrofining and hydroconversion, and a gasoline component and a dieseloil component are obtained; a gasoline product is obtained after the two parts of gasoline are mixed, and a diesel oil product is obtained after the two parts of diesel oil components are mixed. Through reasonable separation and processing processes, different types of raw materials can be selectively and independently processed, so that qualified gasoline and diesel oil products can be produced by reasonably utilizing inferior catalytic cracking diesel oil .

The invention discloses a shock-resistant flame-retardant reinforced PBT (polybutylene terephthalate) composite material and a preparation method thereof. The shock-resistant flame-retardant reinforced PBT composite material comprises the following components in percentage by mass: 45-60% of PBT, 13-20% of polymer flame retardant, 3-10% of antimony trioxide, 0.5-3% of impact modifier, 5-40% of alkali-free glass fiber, 0.5-4% of surface treating agent, 0.2-0.5% of antioxidant, 0.5-5% of toughener and 0.1-1% of lubricant. The composite material well balances the shock resistance, flame retardancy, weather resistance, compatibility, dispersibility, service life and the like of the PBT, thereby providing a PBT composite material with excellent comprehensive properties, and widening the application range of the PBT. The preparation method disclosed by the invention is simple and easy to operate.

A parallel generator system (20) having at least one controller (22, 26) using selective load reduction for load share balancing, and a method for using selective load reduction for load share balancing in a parallel generator system (20).

The invention discloses small waterwheel equipment for hydroelectric power generation. The small waterwheel equipment for the hydroelectric power generation structurally comprises a transmission, a transmission case, a generator, two bases, a spindle and an impeller. The transmission is vertically welded to the front end of the transmission case, a gear in the generator is mechanically connected to an internal component in the transmission, the spindle horizontally penetrates through the top of the transmission case and is movably connected with an axis of the impeller, the bases are arrangedat the bottom of the transmission case, and the impeller is installed at the rear end of the generator and is in clearance fit with the generator. The transmission is connected with the spindle to change speed, the improved small waterwheel equipment for the hydroelectric power generation can adjust the internal transmission ratio to protect the generator and prolong the service life in case of increased precipitation.

The invention discloses an electrode type water level switch, a water heater and a water level detection method thereof. The switch comprises an obtaining device, an electrode (106) and an electrode detection circuit (108); the obtaining device is used for obtaining an alternating weak current signal; the electrode (106) is used for using the alternating weak current signal as a signal source to conduct water level detection; the electrode detection circuit (108) is used for outputting a corresponding water level detection result according to water level detection of the electrode (106). According to the electrode type water level switch, the water heater and the water level detection method thereof, the defects that in the prior art, the degree of electrode corrosion and scaling is nonuniform, the service life is short, and the difficulty of maintenance is big can be overcome, and the advantages of being uniform in degree of electrode corrosion and scaling, long in service life and small in difficulty of maintenance are achieved.

The invention belongs to the field of organic semiconductor materials and discloses an organic electroluminescent device and a preparation method thereof. The organic electroluminescent device comprises a substrate, an anode layer, a hole transmission layer, an electronic barrier layer, a luminescent layer, a hole barrier layer, an electronic transmission layer and a cathode layer which are successively stacked. The hole transmission layer is made of a three-element doped mixing material prepared by doping a metal oxide and a metal doping agent to a hole transmission matrix material. According to the organic electroluminescent device, the hole transmission layer is made of the three-element doped mixing material mixed by doping the metal oxide and the metal doping agent to the hole transmission matrix material, and the metal oxide can improve the conductivity of the hole transmission layer and remarkably reduce hole injection barrier so that the starting voltage of the organic electroluminescent device is reduced, and the service life of the device is prolonged.

The invention discloses an intelligent control method for a stirrer, which comprises the following steps of: acquiring data signals of a stirrer under the working of different stirring tools, and constructing a sample database; constructing a fusion recognition model, obtaining a stirring tool performance recognition result, and determining a stirring tool start-stop switching sequence and operation time according to the stirring tool performance recognition result; collecting the environment temperature, the power supply temperature and the power supply working time of the power supply, and switching the power supply according to the environment temperature, the power supply temperature and the power supply working time, so that the safety of the power supply is ensured by switching the power supply while the normal work of the stirrer is ensured; and based on the performance identification result of the stirring tool, enabling the stirring machine to uniformly dispatch different stirring tools by using a control device. The technical problem of stirring tool switching of the stirrer with the multiple stirring tools is solved, and a new technical thought is provided for an intelligent control scheme in the technical field of stirrers.

The invention discloses a detection device for safe use on a machine tool, which includes an automatic suspension oil collecting pan, a pipeline, a primary filter chamber, a secondary filter chamber, a suction plate, an ultrafine filter chamber, a decompression chamber, a liquid regeneration box, Electronic liquid discharge control box, carrying frame, liquid level detection tube, separation turntable, qualified detection tube, sterilization tube, waste liquid collection tank, upper cover plate, first side plate, rear cover plate, second side plate, lift Casters, electric box, flow detection tube and control panel. The beneficial effect of the present invention is: by setting a primary filter chamber, a secondary filter chamber and an ultra-fine filter chamber inside the device, high efficiency and high purification rate can be realized. By installing a qualified detection tube inside the liquid regeneration box, the loss of product scrapping caused by excessive cutting fluid particles and the labor cost of replacing the cutting fluid can be reduced. By connecting the sterilization pipe on the side of the waste liquid recovery tank, it is possible to eliminate the skin allergies and other diseases of the staff caused by the deterioration of the cutting fluid.

The invention discloses a novel rolling bearing. The novel rolling bearing comprises an inner ring, an outer ring and a retainer, the retainer is provided with a plurality of pockets used for containing rollers, the pockets are connected through beam bodies, and the novel rolling bearing is characterized in that the inner walls of the pockets are provided with open grooves, movable blocks are arranged in the open grooves, one ends of the movable blocks are fixedly connected with the inner walls of the open grooves, grease scraping cottons are arranged at the other ends of the movable blocks, the movable blocks are made of shape memory alloys, the movable blocks have a first form at the first temperature, the movable blocks have a second form at the second temperature, the movable blocks extend in the first form to enable the grease scraping cottons to be exposed out of the open grooves to make contact with the rollers in the pockets, and the movable blocks contract in the second form to enable the grease scraping cottons to retract into the open grooves. According to the novel rolling bearing, the phenomena of grease throwing and grease leakage in the bearing caused by excessive grease in the bearing are avoided, and the service life of the bearing is further ensured not to be reduced due to grease loss.

The invention relates to an adjusting method and an adjusting device of a methanol synthesis system. At the early stage of a catalyst, a part of a process gas at the inlet of a primary methanol synthesis reactor is directly led into the inlet of a secondary methanol synthesis reactor without a reaction, so that the secondary reaction load can be increased, one-reaction temperature exceeding is avoided, the service life of the catalyst of two reactors can be balanced, and the overall service life of the catalyst can be prolonged; at the tail stage of the catalyst, a part of a high-temperature gas at the outlet of the primary methanol synthesis reactor is directly led into the inlet of the secondary methanol synthesis reactor without a reaction, so that the initialization temperature of the catalyst and requirements of reactor heat exchange can be met; and a part of a fresh gas is directly led into a part between the outlet of the primary methanol synthesis reactor and the inlet of the secondary methanol synthesis reactor without passing through the primary methanol synthesis reactor, so that reactions can be delayed, the primary reaction load can be reduced, the secondary reaction load can be reduced, and reaction yields can be ensured.

The invention relates to a well lid for a smart pipe rack with a congestion preventing function and long service life. The well lid comprises the well lid, two well frames and two connecting pipes, and further comprises a congestion cleaning mechanism, two light ray sensors, two dredging mechanisms and two support mechanisms; the congestion cleaning mechanism comprises a driving module and two congestion cleaning modules; the congestion cleaning modules comprise gears, driving wheels, support rods, driving rods and driven plates; the support mechanisms comprise support modules, pressure bearing modules and buffer modules; and the support modules comprise fixed blocks, swing rods, connecting blocks and support blocks. In the well lid for the smart pipe rack with the congestion preventing function and long service life, support force is provided to the center of the well lid through the support mechanisms, so that the support force suffered by the bottom of the well lid is more uniform,the bending deformation probability of the well lid is reduced, and the service life of the well lid is prolonged; and accumulated matters in a water inlet of the well lid are removed through the congestion cleaning mechanism, so that water currents flow through the well lid more smoothly, and the practicability of the well lid is improved.

The invention provides a multi-system air conditioner dispatching method and device and an air conditioner, and relates to the technical field of air conditioner systems.The multi-system air conditioner dispatching method is characterized by comprising the following steps that the accumulated running time and the historical fault frequency of each air conditioner system are obtained; the loss coefficient of each air conditioning system is obtained according to the accumulated operation time and the historical fault frequency; determining the starting priority of each air conditioning system according to the loss coefficient; and when the system starting conditions are met, the corresponding air conditioning systems are started according to the starting priority sequence. According to the method, the starting priority of the multi-system air conditioner is obtained by referring to the three parameters of the accumulated operation time, the historical fault frequency and the system fault occurrence possibility of all the different air conditioner systems and combining the corresponding weight coefficients, and the different air conditioner systems are sequentially started according to the priority and the time sequence; and the service life of the multi-system air conditioning unit is prolonged on the premise of ensuring that the unit can be stably and continuously started and operated.

The invention relates to a balanced box opening method for an intelligent delivery cabinet, storage equipment and processing equipment. According to the balanced box opening method for the intelligentdelivery cabinet provided by the invention, counting processing of the number of times of box opening is continuously carried out on all grids of the intelligent delivery cabinet; when box opening iscarried out according to the box opening request, the box opening counts of all the grids are obtained, the current box opening counts of all the grids are sorted, one of the grids with the smallestbox opening count value is selected as a to-be-opened grid, then the grid is controlled to be opened to store articles, and meanwhile the box opening count of the current grid is increased once. Compared with the prior art, the invention has the advantages of prolonging the service life of each grid, reducing the damage probability of the grid and the like.

The invention discloses an anti-impact environment-friendly flame-retardant polybutylene terephthalate composite material, comprising the following components by mass percent: 45-60% of polybutylene terephthalate, 18-25% of halogen-free flame retardant, 0.5-3% of anti-impact modifier, 5-40% of alkali-free glass fiber, 0.5-4% of silane coupling agent, 0.2-0.5% of antioxidant, 0.5-5% of flexibilizer, and 0.1-1% of lubricant. By adopting the anti-impact environment-friendly flame-retardant polybutylene terephthalate composite material, the impact resistance, the flame retardant property, the weatherability, the compatibility, the dispersing performance and the service life of polybutylene terephthalate are well balanced; the composite material is halogen-free and flame-retardant, free of poison, low in smoke and good in environmental protection property. Thus, the polybutylene terephthalate composite material with excellent overall performance is provided; the application field of polybutylene terephthalate is expanded.