35results about How to "Increase spin rate" patented technology

The invention discloses a micro-fluidic chip, which can realize automatic releasing of samples in a plurality of parallel reaction channels and gradient type concentration control. The micro-fluidic chip rotates on a centrifugal force platform and the speed is adjusted, so that the samples in sample rooms enter spiral channels and flow in the spiral channels; the sequence and volume of the samples entering a liquid mixing room are controlled through adjusting the magnitude of a centrifugal force and a size structure of a metering valve. The invention further discloses a method based on the device, and a micro-fluidic chip structure corresponding to a plurality of types of liquid; the micro-fluidic chip structure comprises the plurality of sample rooms and the plurality of spiral channels. By adjusting the magnitude of the centrifugal force on the micro-fluidic chip, a multi-sample automatic releasing and gradient type concentration control device on the micro-fluidic chip is realized; the micro-fluidic chip is simple in structure and convenient to operate.

The invention discloses a cleanable adhesive smearing device, which relates to the technical field of smearing devices and solves the problem that adhesive coating on rollers affects the uniform application of the adhesive. It includes an adhesive storage bottle, a bracket and a roller. The adhesive storage bottle includes a bottle body and a roller. Bottleneck, the bottle body is fixedly connected to the bracket, the bottleneck is located in the bracket, and there is a cock valve inside the bottleneck, the cock valve knob runs through the bracket horizontally, the cock valve knob is located outside the bracket, and the horizontal glue outlet pipe is arranged inside the bracket, and the horizontal glue outlet pipeline Connected with the bottle neck, there are multiple glue outlet holes on the horizontal glue outlet pipeline, the bracket is connected to the roller through the rotating shaft, a piston is installed in the bottle body, the piston is connected to a piston rod, the other end of the piston rod is connected to a push rod, and the bracket is equipped with The water connection pipe is connected with a horizontal water distribution pipe under the water connection pipe, and a plurality of inclined water spray pipes are arranged on the horizontal water distribution pipe. The present invention can clean the rollers in all directions and thoroughly.

The invention discloses a novel cocooning tool. The novel cocooning tool comprises a cocooning frame and support feet, wherein the cocooning frame consists of transverse frame strips, longitudinal frame strips and cocoon dropping posts, a support shaft is arranged at one end of each support foot, and the support shafts and support shaft holes are matched components. The novel cocooning tool is beneficial to improving the spinning rate; the cocooning frame is supported on the ground through the support feet, the overall air permeability of the device is improved, the cocoon dropping posts on the transverse frame strips and the longitudinal frame strips are transversely and longitudinally separately arranged at intervals, the space is fully utilized, the enough cocooning space is reserved while the number of the cocoon dropping posts is ensured to be sufficient, the enter rate is increased, meanwhile, cross sections of the cocoon dropping posts are non-circular and can be polygonal and star-shaped to facilitate silk hanging, and the cocooning rate can be increased.

An object of the present invention is to provide a golf ball which has an increased dry spin rate and wet spin rate on approach shots without sacrificing the processability into the cover. The present invention provides a golf ball cover material having shear loss moduli G1″ (Pa), G2″ (Pa), and G3″ (Pa) that satisfy following equations when measured using a dynamic viscoelasticity measuring apparatus at following conditions.log G1″≦7.09  (1)log G2″≧7.17  (2)log G3″≦7.14  (3)G1″ measuring conditions: shear mode, oscillation frequency: 10 Hz, temperature: 0° C., strain: 0.05%;G2″ measuring conditions: shear mode, oscillation frequency: 10 Hz, temperature: −30° C., strain: 0.05%; andG3″ measuring conditions: shear mode, oscillation frequency: 10 Hz, temperature: 0° C., strain: 5%.

The invention provides a method for pre-polishing a polishing pad by adopting a polysilicon CMP (Chemical Mechanical Polishing) process. The method not only has the capability of achieving a chemical balance state needed by polishing, but also has low cost and short time. The method provided by the invention is characterized in that: a new polishing pad is pre-polished by adopting a bare wafer; the bare wafer is monocrystalline silicon and can generate a Si<->>Si<4+> chemical reaction with a polishing solution in the pre-polishing process; and a Poly film is not needed to be prepared, therefore the time and cost need by preparation of the Poly film in the traditional scheme are saved.

The invention discloses an air conditioner capable of rotating. The air conditioner comprises a base; the top of the base is movably connected with a rotating block; the bottom of the rotating block penetrates through the top of the base, and extends to an inner cavity of the base; the top of the rotating block is fixedly connected with the air conditioner; grooves are respectively formed in the tops of the frontal surface and the back surface of the air conditioner; a circular groove is formed in the bottom of one end, positioned in the inner cavity of the base, of the rotating block; the bottom of the inner cavity of the base is fixedly connected with a fixed block; and the top of the fixed block extends into an inner cavity of the circular groove. The rotating block is fixed at the top of the fixed block for rotation through a bearing, so that the air conditioner can be rotated, and the use direction of the air conditioner can be conveniently adjusted; the space is cooled or heated through the rotatable air conditioner, so that the cooling or heating efficiency is greatly improved, the temperature adjusting time is saved, and the problem of causing huge economic loss for enterprises using the air conditioner is prevented.

A racquet configured with fewer cross strings than main strings is disclosed. The racquet includes polyester, monofilament racquet strings and a frame extending along a longitudinal axis and including a head portion coupled to a handle portion. The head portion includes a hoop having inner and outer peripheral walls. The hoop defines a head size having maximum longitudinal and transverse dimensions, a, and, b, respectively. The dimension a is at least 1.2 times the dimension b. The inner peripheral wall includes string holes. The string has a diameter within the range of 1.10 to 1.55 millimeters. The string forms a string bed of interlaced main and cross string segments. Each of the cross segments transversely extends from one of the string holes to another, and each of the main segments longitudinally extends from one of the string holes to another. The string bed has at least one more main segment than cross segment. At least one of the main segments contacting the tennis ball exhibits a snap back velocity of at least 1 meter per second.

The invention provides a micro stirrer driven by a multi-core fiber, comprising a pyramidal multi-core fiber made of a section of multi-core fibers via fused biconical taper and small particles made from composite materials, wherein the small particles are located at the pyramidal end of the pyramidal multi-core fiber; the non-pyramidal end of the pyramidal multi-core fiber is connected with a light source; a plurality of fiber core emergent lights of the pyramidal multi-core fiber simultaneously act on the small particles in a vertical suspension liquid; the upper body of each small particle is a sphere and a rotating shaft which are made from materials with lower density; and the bottom of the each small particle is of a windmill-shaped structure with a plurality of wings made from materials with higher density. The micro stirrer provided by the invention has the characteristics of small volume, light weight, simple structure, low price, easiness in operation, high mixing efficiency, benefit of the reduction of reagents, and the like and can be widely applied to the fields of biology and chemistry.

The invention discloses a method for raising silkworms. The method comprises the following steps: selecting a variety: selecting a silkworm variety with high survival rate which is suitable for growth; hatching silkworm eggs: guaranteeing successful hatching of young silkworms; brushing newly-hatched silkworms from cards: chopping mulberry leaves into dices or shreds, then, directly spreading thedices or shreds to silkworm egg paper, and overturning mulberry leaves to rearing beds after newly-hatched silkworms fully crawl onto the mulberry leaves; raising the young silkworms: reasonably regulating and controlling temperature and humidity in a silkworm room at a young silkworm stage, so as to create a high-temperature high-humidity raising environment; rearing grown silkworms: keeping thesilkworm room well-ventilated, so as to ensure indoor air flowing; enabling the silkworms to be placed on small straw bundles to spin cocoons and harvesting cocoons: spreading lime on the ground firstly, then, placing partitioned cocooning frames on the lime, placing matured silkworms on the partitioned cocooning frames, and hanging up cocooning frames. According to the method, raising managementis carried out in stages according to physiological characteristic difference of different stages of the young silkworms and the grown silkworms, thus, the healthy and rapid growth and development ofsilkworm bodies can be effectively promoted, the development of silk glands is prompted to thoroughly form fibroin, the spinning rate of the silkworms is increased, and the cocoon production is increased.

An object of the present invention is to provide a golf ball showing a low spin rate on driver shots and a high spin rate on approach shots. The present invention provides a multi-piece golf ball comprising a center and n (n is a natural number of 3 or more) envelope layers covering the center, wherein material hardness of the envelop layers satisfies H2<H0<Hn−1; where the envelope layers formed in order from the center side are referred to as a first envelope layer, a second envelope layer, a third envelope layer, a fourth envelope layer, . . . an n−1th envelope layer and an nth envelope layer (the outmost layer), respectively and H0 is a material hardness (Shore D hardness) of the center, and H1, H2, H3, H4, . . . Hn−1 and Hn are material hardness (Shore D hardness) of the first envelope layer, the second envelope layer, the third envelope layer, the fourth envelope layer, . . . the n−1th envelope layer and the nth envelope layer (the outmost layer), respectively; and the center is formed from a thermoplastic resin composition, and the second envelope layer is formed from a thermoplastic resin composition or a rubber composition.

The invention mainly relates to the technical field of the silkworm breeding, and discloses a method for improving a silking amount of silkworms. The method comprises the following steps: spraying a growth promoting agent; adding fermentation folium mori; and adding a cluster device. The method is simple and convenient for operation. The silking amount of the silkworms is uniformly increased. The diameter of a monofilament is up to 27.6 um, and the silk length of a silkworm cocoon is up to 1934 m, so the economic income of a silkworm raiser is improved by 13.7%. The growth promoting agent solution is sprayed to the folium mori of 2-4 years of the silkworms. The growth promoting agent solution has the balanced nutrition, contains the protein, and is capable of increasing the fragrance and nutrition of the folium mori, improving the food consumption of the silkworms, accelerating the growth of the silkworms, enhancing the disease resistance of the silkworms, reducing the production of the diseases, promoting the digestive absorption, increasing the nutrition accumulation in the silkworm body, and increasing the secreta content in the silk gland.

A racquet includes polyester, monofilament racquet string and a frame extending along a longitudinal axis and including a head portion coupled to a handle portion. The head portion includes a hoop having inner and outer peripheral walls. The hoop defines a head size having maximum longitudinal and transverse dimensions, a , and, b , respectively. The dimension a is at least 1.2 times the dimension b . The inner peripheral wall includes string holes. Each of the cross segments transversely extends from one of the string holes to another, and each of the main segments longitudinally extends from one of the string holes to another. The end of the vertical size a closest to the cross segment and the handle is used to limit the second vertical size c. The ratio between the size a and the size c is at least 6.5. the line bed is provided with vertical segments, which are at least one more than the cross segments.

The invention discloses a double-vertical-shaft and double-rotor tidal current energy water turbine power generation system, and belongs to the technical field of renewable energy sources. The systemcomprises a vertical shaft water turbine rotor power generation device, gear transmission devices and a seabed pedestal. Two rotors are vertically installed in parallel and conduct relative rotation.Blades are arranged along the rotating faces in an equal interval angle mode and connected to rotating shafts through connecting rods. Each rotating shaft is connected with a supporting framework through an upper bearing and a lower bearing. A bottom supporting plate is fixedly connected with pile leg connecting components. The tidal current energy conversion system can be connected with two generators or one generator through the gear devices. When the double generators work, the rotor rotating shafts are connected with different generators through the gear devices and independently work; andwhen the single generator works, the rotor rotating shafts are connected to a double-rotating-shaft generator through the gear devices. The two rotors conduct relative rotation under the action of the incoming flow and have the beneficial influence on each other, the pulsation characteristic of the system is reduced, the rotating speed of each rotor is increased, and the energy conversion efficiency of the power generation device is greatly improved.

The invention discloses an efficient silk drawing method for a silkworm cocoon. The method specifically comprises the following steps: (1) soaking the silkworm cocoon in deionized water, and adding 20-30 g / I of white vinegar solution with 3-5% of concentration for processing; (2) taking out the silkworm cocoon soaked and treated in step (1), washing by clear water and drying; (3) placing the silkworm cocoon washed in step (2) in soaking solution prepared by sodium acetate, sodium dihydrogen phosphate, dietary alkali, polyethylene wax, sodium stearate, sodium metasilicate, carbolic acid and water, soaking for 3-4 h; (4) taking out the silkworm cocoon soaked and treated in step (3) and performing hot-washing treatment, wherein a hot water temperature is 60-70 DEG C, and washing for 15-20 min; (5) placing the silkworm cocoon hot-washed in step (4) in cold water for washing; and (6) finally, performing silk reeling operation on the cold-washed silkworm cocoon by using a silk reeling machine. The method is simple in treatment technology process, rational in soaking treatment design of the silkworm cocoon, and beneficial to remove a sericin layer of the silkworm cocoon, and reinforce toughness of a silk, and beneficial to improve a silk drawing rate, wherein the silk drawing rate can be improved to 10.3-10.7%.

The invention relates to a small hydraulic power generating system and belongs to the technical field of power generating equipment. The small hydraulic power generating system comprises a canal 1 and a water wagon 2 which is connected with a shaft coupling 5 and a generator 6 through a rotating shaft 3; the canal is of a Z-shaped structure; the lower part of the water wagon 2 is tangent with the bottom of the canal 1, or a relatively small gap is formed between the lower part of the water wagon 2 and the bottom of the canal 1, and the width of the water wagon 2 is slightly smaller than that of the canal; and the water wagon 2 is composed of an annular structure, a plurality of V-shaped buckets 2-7 and supporting net racks 2-1, the annular structure is composed of front and rear water wagon side edges 2-9 and a bottom edge 2-10, the plurality of V-shaped buckets 2-7 are mounted in the annular structure, and the supporting net racks 2-1 are radially arranged outside a rotating shaft 3 and are respectively connected to the front and rear water wagon side edges 2-9 through connecting blocks 2-2. The small hydraulic power generating system is simple and compact in structure, small in floor area, low in cost, needless of water storage, capable of generating power at a relatively small water flow, relatively low in water resource demand, free of strict requirements for site selection, capable of implementing at the edge of a relatively small canal and favorable in market prospect.

The invention mainly relates to the technical field of the silkworm breeding, and discloses a method for improving a silking amount of silkworms. The method comprises the following steps: spraying a growth promoting agent; adding fermentation folium mori; and adding a cluster device. The method is simple and convenient for operation. The silking amount of the silkworms is uniformly increased. The diameter of a monofilament is up to 27.6 um, and the silk length of a silkworm cocoon is up to 1934 m, so the economic income of a silkworm raiser is improved by 13.7%. The growth promoting agent solution is sprayed to the folium mori of 2-4 years of the silkworms. The growth promoting agent solution has the balanced nutrition, contains the protein, and is capable of increasing the fragrance and nutrition of the folium mori, improving the food consumption of the silkworms, accelerating the growth of the silkworms, enhancing the disease resistance of the silkworms, reducing the production of the diseases, promoting the digestive absorption, increasing the nutrition accumulation in the silkworm body, and increasing the secreta content in the silk gland.

The invention provides a centrifugal machine for processing aluminum silicate fiber heat preservation cotton, which comprises two centrifugal machines arranged on a base in parallel front and back, and each centrifugal machine comprises a centrifugal machine body, a walking mechanism, a first connecting plate and a second connecting plate, a walking mechanism used for driving the second connecting plate to move front and back on a rail arranged on the base is arranged below the second connecting plate, the walking mechanism is connected with the second connecting plate through a second damping mechanism, and the second connecting plate is connected with the first connecting plate through a first damping mechanism. The first connecting plate is connected with the centrifugal machine body through an angle adjusting mechanism. The centrifugal thread throwing uniformity of the centrifugal machine body is guaranteed, the thread throwing quality is guaranteed, the working efficiency of the centrifugal machine body is improved, and the working yield of the centrifugal machine body is increased.

The invention provides a tap water power generating device. The tap water power generating device comprises a case which is internally provided with an impeller, a power generator, a rectifier and a storage battery; the case is connected with a water feeding three-way pipe and a water discharging three-way pipe which are provided with solenoid valves; blades comprise the six rotary blades, and a plurality of half-moon impact grooves are formed in the rotary blades; an automatic control display device and a wireless charging panel are arranged on the case and are electrically connected with thestorage battery; the automatic control display device comprises a pressure sensor and controllers of the solenoid valves; and the storage battery is provided with a USB interface and a mains supply interface. According to the tap water power generating device, the blades are impacted to rotate through the water feeding three-way pipe and the water discharging three-way pipe so that the power generator can be driven to generate power, when water pressure is insufficient, the power generator can serve as a motor to drive the impeller to rotate so that the water pressure can be increased, electricity can be supplied to external electric appliances through the storage battery and the wireless charging panel, and the mains supply can be connected to the storage battery so that the storage battery can be charged.

The invention provides a gluing method. The gluing method comprises eccentric spraying treatment, centering spraying treatment and film forming treatment. According to the gluing method, the center ofthe bottom of the spraying part is made to right face the first position of the surface of the to-be-treated substrate through the position control part, the linear distance between the first position and the center of the to-be-treated substrate is larger than 0, and then eccentric spraying treatment is carried out; after the eccentric spraying treatment is finished, the center of the bottom ofthe spraying part is aligned to the center of the surface of the to-be-treated substrate; the pattern transfer medium can form annular and central point-like distribution on the surface of the to-be-treated substrate, so that good-uniformity and chromatic aberration-free light resistance can be further formed on the surface of the to-be-treated substrate through the film forming processing.

The invention relates to the technical field of aerospace craft aerodynamic heat ground simulation test devices, in particular to an arc heater rear end cover. The arc heater rear end cover comprises a base body, an auxiliary air channel and a cooling water channel. The base body is of an integrated sheet-shaped disc structure. The auxiliary air channel comprises a plurality of branch air channels, each branch air channel is spirally arranged around the axis, and the branch air channels penetrate through the two end faces of the base body. The cooling water channel is arranged in the base body in a back-to-back disc shape and distributed between the two end faces of the base body. The branch air channels enable cold air injected by the auxiliary air channel to be the same as or similar to the rotating direction of an arc, the auxiliary swirl performance can be improved, the rotating speed of the arc is increased, the residence time of the single-point arc on the inner wall face of an electrode is shortened, and the cooling burden of a heater electrode is relieved. High-pressure cooling water cools the surface of the heated side of the base body through the back-to-back disc-shaped cooling water channel, burning loss of the wall face is reduced, and the cooling performance of the rear end cover is improved.

The invention discloses an energy-saving PBT resin slice continuous production method in the technical field of PBT resin preparation. The energy-saving PBT resin slice continuous production method comprises the following steps that cleaned PBT resin is conveyed to the bottom of a positioning device through a conveyor belt, and the position of the PBT resin is positioned through the positioning device, the movement rate of a cutting head of a cutting device is adjusted according to the stroke position of the PBT resin, when the PBT resin is farthest from the cutting device, the cutting head is in an idling state or a stopping state, the rotation rate of the cutting head is gradually increased through different moving positions of the PBT resin, and when the PBT resin is closest to the cutting device, the cutting head is in a high-speed motion state for cutting the PBT resin. According to the energy-saving PBT resin slice continuous production method, the working state of the cutting head can be adjusted according to the position of the PBT resin, and use of electric power is reduced.

The invention discloses a mining convenient movable wet filtration dust removal system. The system comprises a dust collection assembly, a wet filtration dust removal assembly and a purification assembly which are sequentially mounted on a movable trolley from right to left, wherein the dust collection assembly is used for conveying dust into the wet filtration dust removal assembly; the wet filtration dust removal assembly comprises a dust removal box body and multiple layers of filter plates arranged side by side left and right; the pore diameters of the multiple layers of filter plates are sequentially reduced from right to left, and a spraying assembly rotating with the horizontal axis as the center is arranged in the middle; and the spraying assembly converts water into water mist and sprays dust to the dust, the clean water mist after dust falling penetrates through the filter plate on the left side to be discharged from the left side of the dust removal box body, and the sewage after dust falling falls into a sewage chamber and is conveyed into the purification assembly to be purified and separated. According to the mining convenient movable wet filtration dust removal system, collection, spraying and dust falling and purification of mining dust are integrated, layered filtration can be achieved, the atomization range is wider during spraying and dust falling, dust attached to the surfaces of the filter plates can be effectively removed, and the dust removal effect and the working efficiency are improved.

The present invention relates to an axial flow turbine, comprising: a rotor mounting part; a housing having a fluid supply part surrounding the rotor mounting part; a rotor which is installed at a rotation shaft installed in the housing and has a plurality of blades installed in a circumferential direction; and a plurality of injection nozzles, installed in the fluid supply part surrounding the rotor mounting part, for spraying a high-pressure fluid toward the blades, wherein the fluid collision surface of the blades installed at the rotor is formed to be inclined at an angle in the rotational direction of the rotor with respect to the normal axis of the rotation center axis, and the injection nozzles formed in the fluid supply part are installed at an angle parallel to the normal direction of the fluid collision surface of the blades. Due to the aforementioned configuration, the present invention provides the effect of maximizing the rotation rate of a turbine while smoothing fluid flow by optimizing the angle of the fluid collision surface of the blades.

The invention provides a micro stirrer driven by a multi-core fiber, comprising a pyramidal multi-core fiber made of a section of multi-core fibers via fused biconical taper and small particles made from composite materials, wherein the small particles are located at the pyramidal end of the pyramidal multi-core fiber; the non-pyramidal end of the pyramidal multi-core fiber is connected with a light source; a plurality of fiber core emergent lights of the pyramidal multi-core fiber simultaneously act on the small particles in a vertical suspension liquid; the upper body of each small particleis a sphere and a rotating shaft which are made from materials with lower density; and the bottom of the each small particle is of a windmill-shaped structure with a plurality of wings made from materials with higher density. The micro stirrer provided by the invention has the characteristics of small volume, light weight, simple structure, low price, easiness in operation, high mixing efficiency, benefit of the reduction of reagents, and the like and can be widely applied to the fields of biology and chemistry.

The invention relates to the technical field of computer hardware, and discloses an efficient cooling device capable of eliminating the high-speed rotation noise of a fan. The cooling device comprisesa cooling device body, a wind power induction device is fixedly mounted at the top of the cooling device body, a baffle is fixedly mounted in the wind power induction device, a ball is slidably connected into the wind power induction device, and through holes are formed in the left side and the right side of the wind power induction device. Through the wind power induction device, when the wind power of the fan reaches a certain value, a sphere in the wind power induction device rises,a sliding block in the sliding groove is pulled to move upwards through a rope, so that a water cooling switch is switched on, and a water cooling system performs the cooling of a CPU; due to the fact that the small through holes are formed in the wind power induction device, when the wind power is insufficient, air entering in unit time can be exhausted instantly, and the effects that when the fan operates to generate noise, the temperature of the CPU is lowered, the rotating speed of the fan is lowered, and the noise is eliminated through the water cooling system are achieved.

The invention relates to a roof unpowered fan set for a livestock-raising pigsty. The roof unpowered fan set comprises a wind resistance cover, rotary fans and unpowered fans and is characterized in that a device body is provided with a middle flat top, and six rotary fans are symmetrically arranged at the upper end of the middle flat top; each rotary fan comprises wind accumulation bowls and a rotary shaft; an electricity conversion and storage device is further arranged on one side of the top end of the middle flat top; lateral oblique tops are symmetrically arranged on two sides of the middle flat top; each unpowered fans are symmetrically arranged at the upper end of each lateral oblique top; air collecting tubes are fixedly arranged at the bottom ends of the lateral oblique tops, andthe upper ends of the air collecting tubes are communicated with the unpowered fans. The roof unpowered fan set has the advantages that three hollow semispherical-structured wind accumulation bowls are arranged at the top end of each rotary shaft in an annular arrayed manner, the semispherical structures are beneficial to wind accumulation and rotation, rotation speed is increased effectively by the three wind accumulation bowls arranged on each rotary shaft, and experiments show that wind power can be sufficiently utilized by the three wind accumulation bowls.

The invention belongs to the technical field of wind driven generators, and particularly discloses a resistance and lifting force type wind driven generator. The resistance and lifting force type winddriven generator comprises a main shaft, wherein a motor is arranged at the bottom of the main shaft, an upper supporting disc is arranged at the top end of the main shaft, a lower supporting disc isarranged at the bottom end of the main shaft, the upper supporting disc and the lower supporting disc are connected through a spline and are ring-shaped, each supporting disc is provided with three supports along the circumference uniformly in the horizontal direction, three upper supports are arranged on the upper supporting disc, three lower supports are arranged on the lower supporting disc, the upper supports and the lower supports are parallel, a blade in the vertical direction is arranged between each upper support and the corresponding lower support which are opposite vertically, and starting directions of the three blades are the same. According to the invention, a lifting force type wind driven generator and a resistance type wind driven generator are integrated simultaneously, meanwhile, functions of both the lifting force type wind driven generator and the resistance type wind driven generator are obtained, advantages of both the lifting force type wind driven generator andthe resistance type wind driven generator are integrated, and the utilization efficiency of wind power is high.

The invention belongs to the field of vibration control, and particularly relates to a high-energy-consumption-density torsional eddy current damping device and damping system. The eddy current damping device comprises at least one stage of speed increasing gear set, conducting tubes which are in running fit with each other, and magnets which are arranged in a staggered manner along the annular direction. The output end of the speed increasing gear set is connected with the conducting tubes; and the speed increasing gear set can drive the conducting tubes to rotate relative to the magnets arranged in the staggered manner along the annular direction. According to the high-energy-consumption-density torsional eddy current damping device provided by the invention, the energy consumption density can be greatly improved, the needed damping torque is generated, the damping torque acts on an external structure so as to meet the requirement for the high energy consumption density, and the purpose of restraining structural vibration is achieved.

The invention relates to the technical field of aerodynamic thermal ground simulation test devices for aerospace vehicles, in particular to a rear end cover of an arc heater. The rear end cover of the electric arc heater includes a base body, an auxiliary air channel and a cooling water channel. The air channel is arranged through the two end faces of the base body; the cooling water channel is set inside the base body in a coiled shape and distributed between the two end faces of the base body. The branch air channel makes the cold air injected by the auxiliary air channel the same or similar to the rotation direction of the arc, which can improve the auxiliary cyclone performance, enhance the rotation rate of the arc, reduce the residence time of the single-point arc on the inner wall of the electrode, and reduce the cooling burden of the heater electrode . The high-pressure cooling water cools the heated side surface of the substrate through the back-to-back plate-shaped cooling water channel, reducing the burning loss of the wall surface and improving the cooling performance of the rear end cover.