55results about How to "Avoid fatigue fracture" patented technology

The invention discloses a self-adaptive lubrication worm gear case, and belongs to the technical field of worm gear cases. The self-adaptive lubrication worm gear case comprises a housing and a bottom shell, and further comprises an oil inlet formed in the top of the housing; the oil outlet is formed in the bottom of the bottom shell; a worm gear and a worm are arranged in a worm gear box composed of the cover shell and the bottom shell, and the worm gear and the worm are connected in a meshed mode. The first gear and the worm rotate synchronously, the first gear is arranged in the bottom shell, and a plurality of second gears are connected to the first gear in a meshed mode; the vertical pipe is arranged in the bottom shell, the top end of the vertical pipe is communicated with a taper pipe, an impeller is arranged in the taper pipe, the impeller is fixedly connected with the second gear, and the taper pipe is communicated with a nozzle; accumulated stress at the two ends of the worm can be released, accumulation of internal stress is reduced, fatigue fracture of the worm is avoided, and the service life of the worm gear case is prolonged.

The invention discloses a wind turbine blade root bolt group loosening degree online monitoring and fatigue life prediction method, which belongs to the field of wind power, and comprises the following steps: determining the blade shimmy direction of a monitoring unit; arranging strain gauges; acquiring strain data; setting early warning and alarm rules; establishing a monitoring bolt group K value curve; detecting the most unfavorable bolt axial force; calculating the average axial force of the most unfavorable bolt; calculating the tension increment in the screw under the action of the most unfavorable fatigue load on the bolt; the equivalent stress amplitude and the average stress of the most unfavorable bolt are calculated; and determining the residual fatigue life of the most unfavorable bolt. According to the method, the bolt loosening area and the most unfavorable bolt fatigue life prediction in the area are combined, the accuracy of blade root bolt life prediction is improved, and the blade root bolt loosening problem can be found and treated early and the possibility of fatigue fracture can be eradicated through accurate identification of the local bolt group loosening degree.

The invention belongs to the technical field of crushing and mixing devices, and relates to a horizontal crushing and mixing device which comprises a mixing barrel and a stirrer coaxially mounted in the mixing barrel, the stirrer comprises a stirring shaft as well as a plurality of propeller blades, a spiral blade, a plurality of groups of crushing blades, a plurality of groups of auxiliary stirring blades and a plurality of groups of discharging rods which are fixed on the stirring shaft, and the plurality of propeller blades, the spiral blade, the plurality of groups of crushing blades and the plurality of groups of discharging rods are sequentially arranged along the axial direction of the stirring shaft; the plurality of groups of auxiliary stirring blades are uniformly arranged between the spiral blade and the discharging rod along the axial direction of the stirring shaft; the two side edges of each auxiliary stirring blade are fixedly connected with the supporting rods of the crushing paddles of the two adjacent groups respectively, and the bottom edge of each auxiliary stirring blade is fixedly connected with the stirring shaft. Through the arrangement of the paddle combination mode of each area, the blockage of solid materials is reduced, the quantitative pushing of mixed materials is realized, the crushing and mixing efficiency is improved, the equipment reliability is improved, and meanwhile, the material and processing cost of parts is reduced.

The invention discloses a method, a device and equipment for correcting staggered holes of a flange of a wind turbine generator and a medium, and belongs to the technical field of wind power. The method for correcting the staggered holes of the flanges of the wind turbine generator comprises the steps that under the condition that the wind turbine generator is shut down and an impeller is locked, individual bolts in a plurality of bolts connecting a hub flange and a rotating shaft flange are detached, and the staggered hole directions of the hub flange and the rotating shaft flange are determined according to screw holes corresponding to the detached bolts; the remaining bolts for connecting the hub flange and the rotating shaft flange are loosened, and then preset fastening torque is applied for fastening; and the impeller is controlled to rotate according to the target direction corresponding to the hole staggering direction under the acting force of wind until the hole staggering distance between the hub flange and the screw hole corresponding to the disassembled bolt and the hole staggering distance between the rotating shaft flange and the screw hole corresponding to the disassembled bolt are smaller than the preset error distance. According to the embodiment of the invention, the safety of the wind turbine generator can be improved.

The invention relates to the technical field of medical instruments, and discloses a micro catheter. Wherein the microcatheter is sequentially provided with a lining tube and a high polymer material layer from inside to outside in the radial direction, a variable-diameter section is arranged at the far end of the microcatheter, a small-diameter section is arranged on one side of the far end of the variable-diameter section, and a large-diameter section is arranged on one side of the near end of the variable-diameter section; the high polymer material layer comprises a first hardness area, a second hardness area and a third hardness area which are sequentially arranged from the far end to the near end, the first hardness area is located on a part of the small-diameter section, the second hardness area is located on the other part of the small-diameter section, the variable-diameter section and a part of the large-diameter section, and the third hardness area is located on the other part of the large-diameter section; the hardness of the first hardness area is smaller than that of the second hardness area, the hardness of the second hardness area is smaller than that of the third hardness area, and smooth transition of different hardness materials of the large-diameter section and the small-diameter section of the microcatheter is achieved; the flexural rigidity of the reducing section is reduced, so that the change value of the flexural rigidity is reduced, the stress concentration is reduced, and the reliability of the microcatheter is improved.

The utility model relates to a transverse impedance multidirectional damping steel spring device which comprises a spring outer sleeve (1), a steel spring (5) and a spring inner sleeve, the spring inner sleeve comprises a spring inner sleeve cover (2) and a spring inner sleeve base (6), and a transverse impedance elastic body (3) for transverse limiting is arranged between the spring outer sleeve (1) and the spring inner sleeve base (6). Compared with the prior art, three-direction damping amplification is adopted, besides the main vibration isolation direction, the stability and vibration in the direction perpendicular to the main vibration isolation direction of the spring can be controlled, and meanwhile the problem that the spring is subjected to transverse shearing dynamic load to cause fatigue fracture and failure of the spring is solved; therefore, the transverse stability and reliability are improved, and the service life of parts is prolonged.

The application provides a jacquard needle wire protection structure, and relates to the field of jacquard needles.The jacquard needle body is characterized in that a plurality of FCC wires are connected to one side of the jacquard needle body, a protective net is arranged on the FCC wires, silica gel is filled between the FCC wires and the protective net, a tail wire clamp is arranged on the jacquard needle body, the tail wire clamp covers the protective net, silica gel is filled between the protective net and the tail wire clamp, a rolling belt is connected between the tail wire clamp and the protective net, and a pair of nuts are connected between the jacquard needle body and the tail wire clamp.The application has the following advantages: the structure forms a relatively closed and elastic stress isolation area at the ceramic piece end of the wire, effectively blocks the transmission of external equipment vibration to the wire, avoids internal stress concentration and fatigue fracture of the FCC wire due to resonance, and significantly improves the reliability and service life of the wire in a high-voltage (DC 200V) working environment.

The invention provides an anti-galloping device for an overhead power transmission line, and belongs to the technical field of power transmission system protection circuits, and the anti-galloping device is characterized in that a plurality of through holes are uniformly formed in an annular isolation ring; one ends of the plurality of lead wire clamps are fixedly connected with the plurality of through holes through bolts, and the other ends of the lead wire clamps are fixedly connected to the power transmission lead wire; the equipment box is fixedly connected to the bottom of the annular isolation ring through a connecting rod; a plurality of horizontal shock absorbers and vertical shock absorbers are arranged in the equipment box, the horizontal shock absorbers are evenly distributed and fixedly connected to the inner top face of the equipment box, and the axes of the horizontal shock absorbers are perpendicular to the axis of the connecting rod. A plurality of vertical shock absorbers are uniformly distributed and fixedly connected to the inner bottom surface of the equipment box, and the axes of the vertical shock absorbers are parallel to the axis of the connecting rod; the horizontal shock absorber and the vertical shock absorber are combined to form the integral anti-galloping device, energy of horizontal vibration, vertical vibration and torsional vibration is absorbed at the same time, multi-directional shock absorption is carried out, and vibration of a power transmission wire in any direction can be reduced.

The utility model relates to the technical field of track beam supports, in particular to a straddle type monorail traffic PC track beam support which comprises an upper swing and a lower swing, a single lug plate is arranged at the bottom of the upper swing, a rotating hole is formed in the single lug plate in the transverse bridge direction, a hinged shaft is rotationally arranged in the rotating hole, and a double-lug fork is arranged at the top of the lower swing. A sliding hole is formed in the double-lug fork, the two ends of the hinged shaft are inserted into the sliding hole, a first sliding plate and a second sliding plate which can slide mutually are arranged between the top and the bottom of the hinged shaft and the top and the bottom of the sliding hole, the first sliding plate is fixedly arranged on the hinged shaft, and the second sliding plate is fixedly arranged on the inner wall of the sliding hole. Sliding spaces are formed between the two sides, in the bridge direction, of the hinged shaft and the inner walls of the sliding holes, so that the upper pendulum can slide in the bridge direction relative to the lower pendulum through the first sliding plate and the second sliding plate. The upper pendulum and the lower pendulum of the support longitudinally move through the two sliding blocks, and abrasion of the hinged shaft and the lower pendulum is avoided.

The utility model discloses a self-locking grounding wire clamp for a steel rail, which relates to the technical field of grounding devices and comprises a rod body, a clamping block, a locking nut, a locking mechanism arranged on the clamping block and a locking sleeve matched with the locking mechanism. The locking sleeve is buckled on the outer side of the locking nut and matched with the clamping block, a rotation stopping boss used for clamping a wire nose is arranged on one side, close to the locking nut, of the clamping block, and the wire lug protection shell is arranged on the outer side of the connecting portion of the grounding cable and the wire nose in a covering mode. The clamping block and the locking sleeve are matched to form the wire lug protection shell, the wire lug is clamped on the inner side of the rotation stopping boss, it is ensured that the wire lug does not shake relatively when the nut is screwed or loosened, and fatigue fracture of a cable is avoided; the locking sleeve can completely cover the compression nut, and the nut cannot be loosened in any mode without unlocking, so that the reliability of the grounding wire clamp is greatly improved.

The utility model provides an evaporation and reheating integrated air conditioning unit evaporator. The evaporation and reheating integrated air conditioning unit evaporator comprises an evaporation coil pipe assembly, a reheating coil pipe assembly, a copper pipe assembly and a one-way valve support. The evaporation coil assembly is connected with the reheating coil assembly through a copper pipe assembly, a one-way valve is arranged on the copper pipe assembly, and a one-way valve support is arranged at the bottom of the one-way valve. The expansion valve device is connected with the copper pipe assembly, and the copper pipe assembly is connected with the reheating coil assembly. The compressor exhaust pipe is connected with the reheating coil assembly and connected with the condenser through a branch pipe, and the condenser is connected with the expansion valve device through a pipeline. The evaporation and reheating integrated air conditioning unit evaporator has the advantages that electric heating is replaced by part of condensation heat, consumption of electric heating power is reduced, and energy conservation and environmental protection in the true sense are achieved.

The utility model relates to the technical field of fragrance diffusing equipment provides a fragrance diffuser, the fragrance diffuser includes casing, liquid storage bottle, gas pump and has atomization seat, connecting seat and atomization cover atomization subassembly, atomization subassembly is detachably arranged in casing through atomization seat, and atomization seat includes inner side wall, outer side wall, fixed platform and fixed column. In which, the fixed space is formed between the outer side wall and the inner side wall, the fixed platform is arranged in the fixed space, the fixed platform is hollowly arranged, the fixed column is arranged in the fixed platform, and the atomization cover is connected to the fixed column. The atomization seat provided by the utility model is provided with the hollow fixed platform by setting the inner side wall and the outer side wall on the atomization seat and forming the fixed space between the inner side wall and the outer side wall, so that the structure of the atomization seat is simpler and can realize light weight, the required material can be reduced, the production cost is reduced, the fixed column is arranged on the fixed platform, and the atomization cover is connected to the fixed column, so that the fixed column is more stable and can prevent fatigue fracture between the atomization cover and the fixed column.

The utility model discloses an electrochemical device and electronic equipment, including electrode subassembly, including electrode main part and the first pole lug and the second pole lug of its same side extension, pole post subassembly is used for leading out the polarity of electrode main part, lower casing includes first casing and second casing and both connections form the step of intercommunication, wherein first casing is used for placing electrode main part, and second casing is used for placing pole lug, electrolyte and pole post subassembly, casing insulating part and pole post insulating part, and the connecting portion of pole lug and electrode main part is located at the step, upper cover plate is used for with lower casing connects and forms sealed structure, casing insulating part and pole post insulating part are located between pole post subassembly and lower casing, are used for the insulation of pole post subassembly and lower casing, the utility model discloses can effectively avoid the fatigue fracture of pole lug bending, and the step structure of setting reduces the heat of bending, improves energy density simultaneously.

The invention discloses a spiral compression spring which comprises supporting rings at the two ends and a spring body located between the two supporting rings, the spring body and the supporting rings are sequentially, directionally and spirally wound to form a cylindrical shape, the rings at the two ends of the spiral compression spring are tightened and ground flat or flattened and then tightened and ground flat, and gaps are formed between the rings of the spring body. A contact line compensation ring is additionally arranged on the supporting ring; the contact line compensation ring and the supporting ring are integrally formed, and the contact line compensation ring extends by a certain length from the contact point of the supporting ring and the spring body to the tail tip direction along the spiral line of the supporting ring. According to the method, the contact line of the cylindrical spiral compression spring can be independently compensated, the length of the contact line meeting the standard requirement can be obtained without loading or loading a very small axial load, the properties such as the total number of turns, the number of effective turns, the free height, the compression height and the reserved safety stroke are not changed, the stability and the bearing capacity are improved, and the service life of the spiral compression spring is prolonged. The service life is prolonged.

This application relates to the field of connector technology, disclosing a first electrical connector and a detachable connector device. The first electrical connector includes a base and a terminal assembly. The base has a communicating insertion slot and a receiving slot; the terminal assembly includes a first terminal, which includes a first fixing part, a first soldering part, and a first mating part. The first fixing part and the first mating part are respectively located at both ends of the first soldering part; the first fixing part is connected to the base, and portions of the first soldering part and the first mating part are located in the receiving slot, while a portion of the first mating part is located in the insertion slot. The first terminal is connected to the base through the first fixing part, and the connection between the first soldering part and the first mating part is located in the receiving slot, allowing it to move relative to the base within the receiving slot. In this way, the entire first mating part can move relative to the base, effectively avoiding the fatigue fracture problem at the junction of the first terminal and the base, and effectively extending its service life.

The utility model relates to the field of vehicle accessories discloses rear -view mirror assembly and vehicle. Rear -view mirror assembly, include: support, support is used for with vehicle body is linked together, mirror shell, mirror shell is rotatable with support connection, and the lens is installed on mirror shell, wire harness, one end of wire harness is located in mirror shell, and the other end of wire harness is worn out mirror shell, and passes through support, clamp, clamp is linked with support, and clamp is arranged ring structure, and the ring of clamp is arranged on the outside of wire harness, and the circumferential side wall of clamp is equipped with through -going mouth to supply wire harness to go in and out clamp. Clamp mainly realizes fixed through the mode of ring and is wrapped wire harness, and the risk that will not produce like metal tablet compression joint such as concentrated extrusion, fundamentally eliminates the risk that wire harness is damaged because of compression. Meanwhile, the ring structure that clamp sets up and is equipped with through -going mouth on the circumferential side wall, and this structure design makes wire harness conveniently go in and out clamp, and need not powerful compression joint when assembling, reduces the risk of mechanical damage.

The utility model discloses an outdoor unit condenser mounting assembly relates to air conditioner outdoor unit condenser field, the utility model discloses a condenser main part, the below of condenser main part is with air conditioner outdoor unit box body swing joint through mounting assembly, the mounting assembly includes support work piece, installation slide rail, the support work piece is with connecting portion, the joint portion and is composed, two sets of support work piece mirror image installation in the bottom of condenser main part, the utility model discloses a mounting assembly, and the recess - convex block guide structure of installation slide rail and support work piece makes condenser main part along the predetermined path slip, replaces manual alignment bolt hole position operation, when condenser pushes in, and the joint piece of joint portion is under the slope of guiding inclined plate automatic import card slot under the action of slope, simultaneously, and unilateral self -tapping bolt is screwed in installation slide rail through the straight slot of joint portion, and the engagement of joint piece and card slot is combined and forms double -fixed, and the traditional multi -point bolt fastening is simplified as once push -in and single -point locking, and the repeated adjustment process is eliminated.

The utility model relates to the technical field of scroll compressors, in particular to a spring installation structure of a scroll compressor and the scroll compressor, the spring installation structure of the scroll compressor comprises a fixed disc assembly, and the top of the fixed disc assembly is provided with a fixed disc groove; the sealing assembly is arranged right above the groove of the fixed disc, and the sealing assembly can move in the vertical direction; the spring is arranged in the groove of the fixed disc; and the limiting part is arranged between the sealing assembly and the fixed disc groove, and when the sealing assembly moves downwards to a limit position, the limiting part enables a containing space capable of containing the spring to be formed between the fixed disc groove and the sealing assembly. According to the spring mounting structure of the scroll compressor and the scroll compressor, the problem that in an existing scroll compressor, a spring is prone to failure due to overlarge stress borne by the spring can be solved.

The utility model relates to water route structure technical field, and disclose a water route connecting structure for engine is suitable for the pipeline connection between EGR cooler and temperature regulator seat of high horse power natural gas engine, and provides cooling liquid flow passage, specifically includes first water pipe joint, second water pipe joint, connecting pipe, and the opening end of first water pipe joint and second water pipe joint all has the seat hole of centering arrangement, and the both ends of connecting pipe are connected with first water pipe joint and second water pipe joint respectively through seat hole. The utility model discloses through the interference fit of annular protrusion of sealing sleeve both ends and seat hole inner wall, and then through the hard contact occlusion of seat hole inner wall after the thermal expansion of steel pipe lining temperature, improves the stability of connection, and also can make up the elastic attenuation caused by sealing sleeve aging, thereby realizes double seal, prevents cooling liquid leakage, effectively improves the sealing property of engine water route connection, and convenient to dismount, is convenient for the overhauling and maintenance of later period.

The application discloses a floating type marking needle assembly, which comprises a floating needle head base, an electromagnetic valve, a needle cavity core, a printing needle, a needle outlet air inlet connector, a needle cavity sleeve and a needle return air inlet connector. The electromagnetic valve is fixed on the floating needle head base. The needle cavity core is vertically inserted into a vertical inner cavity on the bottom surface of the floating needle head base, and the printing needle is vertically inserted into the inner cavity of the needle cavity core. The upper part of the printing needle separates the inner cavity of the needle cavity core into an upper air cavity and a lower air cavity which are isolated from each other. The needle cavity sleeve is sleeved outside the needle cavity core, and the needle cavity sleeve is connected with the floating needle head base and makes the upper end of the needle cavity core tightly abut on the top surface of the vertical inner cavity. The space between the needle cavity sleeve and the needle cavity core forms a gas storage cavity, the lower air cavity is communicated with the gas storage cavity, and the needle return air inlet connector is communicated with the gas storage cavity. The floating type marking needle assembly has the technical advantages of good flexibility, more accurate control for each needle, high efficiency, energy saving, small gas consumption and small noise.

This utility model discloses a hook assembly and lifting equipment based on anti-disengagement of steel ingot molds, relating to the field of steel ingot mold lifting. The key technical points are: it includes an installation part and an elastic telescopic part located below the installation part. A hook is installed on the telescopic part of the elastic telescopic part. The elastic telescopic part has a high-strength spring and a damper. The effect is that when the hook lifts the steel ingot mold, the shaking and impact forces generated during the lifting process due to starting and stopping inertia and running vibrations are first transmitted to the elastic telescopic part. The high-strength spring in the elastic telescopic part absorbs some energy through its own elastic deformation, reducing the impact force. At the same time, the damper plays a buffering role, effectively dissipating the remaining energy, reducing the vibration amplitude and frequency, thereby reducing the periodic alternating load borne by the connection between the hook and the steel ingot mold, avoiding hook fatigue fracture, preventing relative displacement or disengagement between the steel ingot mold and the hook, and ensuring lifting safety.

The invention provides a fixing structure, an outdoor unit and an air conditioner, relates to the technical field of air conditioners, and solves the technical problems that a plurality of electronic expansion valves are easy to violently shake in the transportation process, so that pipelines are broken, and after-sales complaints are caused. The fixing structure comprises a first plate body and a second plate body which are arranged in an L shape, and the first plate body is vertically arranged and connected with the partition plate in an attached mode. The second plate body is horizontally arranged and connected with the valve bracket; a fixing groove is formed in the second plate body, and the electronic expansion valve is installed in the fixing groove; the electronic expansion valve further comprises a self-locking assembly, and the self-locking assembly is arranged at the position of the fixing groove so as to lock the position of the electronic expansion valve. The electronic expansion valve is fixed through the self-locking type fixing structure, vibration and noise during operation of the whole machine can be reduced, and then the stress strain of a pipeline is reduced; and meanwhile, the problem that the valve body shakes violently under the severe road condition in the product transportation process, so that a pipeline is stressed and is subjected to fatigue fracture is solved, the product failure rate is reduced, and the product quality is improved.

The utility model provides a battery box and a battery pack, relates to the technical field of batteries, and aims to solve the technical problem that the middle part of a box cover in the prior art is easy to fatigue and fracture. The battery box comprises a box body, a top cover, a pressing strip and a first connecting piece, the box body comprises a frame and a first structural beam, a containing space is defined by the frame, and the first structural beam is located in the containing space and connected with the frame; the top cover is arranged above the accommodating space in a covering manner, and the top cover is provided with a first mounting hole; the pressing strip is arranged on the side, away from the box body, of the top cover, and the pressing strip is provided with a first matching hole; and the first connecting piece penetrates through the first mounting hole and the first matching hole and is connected with the first structural beam.

The invention provides a preparation method of a temperature and pressure integrated sensor, and the method comprises the steps: providing a temperature sensing module which comprises a temperature sensing probe, and the temperature sensing probe comprises a first pin and a second pin which are sufficient in length; performing film coating treatment on the first pin and the second pin; the first pin and the second pin are packaged to form an L-shaped back-to-back structure, and each of the first pin and the second pin comprises a first part, a second part and a bending part connected with the first part and the second part; a base is provided, the base comprises a first protruding column, a second protruding column and a plurality of PIN penetrating holes, the first protruding column, the second protruding column and the PIN penetrating holes penetrate through the base, and the first protruding column and the second protruding column are electrically connected with the second portion of the first pin and the second portion of the second pin respectively; and providing a pressure sensing module which is formed by silk-screen and sintering on the base and is electrically connected with the plurality of PIN through holes. And the function failure of the temperature and pressure integrated sensor caused by the failure of additional welding spots can be fundamentally avoided.

The utility model relates to the technical field of coal mill pull rods, and discloses a medium-speed coal mill pull rod connecting structure which comprises an upper pull rod and a lower pull rod arranged on the lower portion of the upper pull rod. The connecting piece is arranged at the bottom of the upper pull rod and used for connecting the upper pull rod and the lower pull rod; the connecting clamping sleeve is arranged at the bottom of the lower pull rod and used for connecting the lower pull rod; the hydraulic rod is arranged at the bottom of the connecting clamping sleeve; the connecting piece comprises a threaded sleeve arranged between the upper pull rod and the lower pull rod and a threaded rod arranged on the outer side of the upper pull rod and the outer side of the lower pull rod. The upper pull rod and the lower pull rod are connected through the connecting piece with the internal threads, the diameter of the connecting position is not reduced, a 90-degree corner is omitted, loading force and impact force generated by vibration in the running process of the coal mill are not transmitted through a plane at the corner, and stress concentration metal fatigue fracture is avoided.

The application discloses a compressor assembly and an air conditioner. The compressor assembly comprises a compressor, a pipeline connected with the compressor, a buffer assembly and a mounting seat. The buffer assembly is connected with the mounting seat and the compressor and comprises an elastic member. The elastic member is used for buffering the torsion of the compressor around the axis of the compressor. When the buffer assembly is used for buffering the torsion generated by the shutdown of the compressor, the elastic member can generate a reaction force to buffer the torsion of the compressor, thereby, it is beneficial to avoid the swing of the pipeline (the suction pipe and / or the exhaust pipe) connected with the compressor, and further, it is beneficial to avoid the problem that the stress of the pipeline exceeds the standard or even the pipeline is broken due to fatigue. When the buffer assembly is used for buffering the torsion generated by the start of the compressor, the working principle and the role of the buffer assembly are the same as the foregoing, and details are not described herein.

The present invention relates to the field of wind turbine blade design, and mainly discloses a wind turbine blade down conductor system based on metal mesh lightning current conduction and its assembly device, including a root down conductor arranged in a serpentine distribution at the root of the blade, a metal mesh system laid on the outer surface of the blade to replace the cable, a cable arranged at the tip of the blade and connected to multiple lightning receptor systems, and a tip lightning receptor at the tip of the blade for lightning reception, and the metal mesh system is composed of a main metal mesh laid in the middle of the outer surface of the blade and a first grounding metal mesh and a second grounding metal mesh overlapped at both ends of the main metal mesh. The present invention fundamentally avoids fatigue fracture of the down conductor caused by high strain of large-sized blades, and also saves the operation of pouring the down conductor on the web. Even if the down conductor is broken, the present invention only needs to polish and repair the metal mesh on the outer surface of the blade and repair it, saving maintenance time and cost.

The utility model provides a kind of crankshaft and compressor, crankshaft includes the crank, counterweight and main shaft being connected with each other, crank is used to be driven with connecting rod connection, main shaft has cylinder seat cooperation section, the ratio of the axial dimension of crank and the diameter of crank is between 0.98 to 1.2, the length of cylinder seat cooperation section accounts for 59.3% to 69.3% of the length of main shaft.The utility model application solves the stress concentration risk of small shaft diameter crank in prior art, easy to cause crank fatigue fracture, and further causes the problem of equipment failure.

The invention discloses a vibration reduction structure and refrigeration equipment. The vibration reduction structure comprises a vibration reduction barrel and vibration equipment located in the vibration reduction barrel. A plurality of vibration reduction spacers are arranged between the vibration reduction cylinder and the vibration equipment, the vibration reduction spacers divide the area between the vibration reduction cylinder and the vibration equipment into a plurality of vibration reduction spaces, and liquid vibration reduction media are arranged in the vibration reduction spaces. Vibration generated by vibration equipment located in the vibration reduction space is dissipated through a mass-spring system composed of the vibration reduction space and the liquid vibration reduction medium in the vibration reduction space, noise of the vibration equipment is reduced, and therefore the comfort level of a user is improved.