35results about How to "Basic structure is simple" patented technology

The invention discloses an ultra-wideband electromagnetic super-surface circular polarizer, which comprises a dielectric substrate, a metal resonance array and a metal grounding plate, wherein the metal resonance array is printed on the top surface of the dielectric substrate; the metal grounding plate is printed on the back surface of the dielectric substrate; the metal resonance array comprises a plurality of micro-crack Jerusalem cross units which are arranged in a periodic matrix; each micro-crack Jerusalem cross unit is equal in structure parameter and comprises two orthorhombic I-shaped metal arms, namely a horizontal I-shaped metal arm extending in the horizontal direction, namely an X axis, of the dielectric surface, and a vertical I-shaped metal arm extending in the vertical direction, namely a Y axis, of the dielectric surface; the center of a horizontal metal wire at the middle part of the horizontal I-shaped metal arm is intersected with the center of a vertical metal wire at the middle part of the vertical I-shaped metal arm; two micro-cracks which run through the horizontal metal wire at the middle part are etched on the horizontal metal wire at the middle part of the horizontal I-shaped metal arm; and the two micro-cracks are symmetrically located at the left side and the right side of the vertical metal wire at the middle part of the vertical I-shaped metal arm. The ultra-wideband electromagnetic super-surface circular polarizer has the characteristic of high working frequency.

The invention discloses a dual-function polarization converter based on graphene DC contact. The substrate comprises a metal bottom layer, a silicon middle layer and a silicon dioxide surface. The artificial structure is unit structures arranged in an array on the substrate surface. Each unit structure comprises an I-shaped graphene arm and an I-shaped metal arm which are mutually orthogonal and whose centers coincide; the graphene arm is pressed below the metal arm; longitudinal graphene arms are mutually connected; gaps exist between transverse metal arms; the center of the unit structure array is located in the central line of the substrate; 10 to 200 unit structures are in longitudinal and transverse directions, and the numbers are the same; and the I-shaped graphene arms and the I-shaped metal arms are bilaterally symmetrical relative to the longitudinal central line, and are vertically symmetrical relative to the transverse central line. Switching of two functions of linear polarization and circular polarization can be realized without changing structural parameters and without changing bias voltage Vg; the graphene arms are connected in an end-to-end mode to form DC contact, and integrated control on graphene bias voltage is facilitated; the structure is simple, and processing and production are easy; and the conversion efficiency is as high as 99%.

The invention discloses a controllable slope type microalgae cultivation system and a microalgae cultivation method thereof. The system mainly comprises a microalgae pretreatment tank, a controllable slope type self-flow automatic temperature raising microalgae cultivation device on which a heat absorption coating is coated, and a microalgae liquid collection and aftertreatment tank; the controllable slope type self-flow automatic temperature raising microalgae cultivation device is arranged on an inclined surface with the slope ratio of 1 to 5 percent; the heat absorption coating is coated on the inner walls of straight pipes and U-shaped pipes, which are near one side of the inclined surface; the straight pipes and the U-shaped pipes form the controllable slope type self-flow automatic temperature raising microalgae cultivation device; each U-shaped pipe is provided with a carbon dioxide air inlet; two ends of each straight pipe are provided with valves; each straight pipe is also provided with an oxygen discharging hole; the tail end of the controllable slope type self-flow automatic temperature raising microalgae cultivation device is provided with a flow controller; primary microalgae liquid in the pretreatment tank is led into the controllable slope type self-flow automatic temperature raising microalgae cultivation device, so microalgae is collected and cultivated for 12 to 24 hours periodically; the system can cultivate the microalgae on scales, has a simple basic structure, is easy to implement, and can meet the industrial cultivation requirement of the microalgae.

This invention relates to centrifugal pump ring sealing device. It includes sealing ring between pump case body and blade; fastening device fixing the sealing ring in rotating direction; closing ring; closing ring groove at internal face of pump case. The closing ring is arranged in the closing ring groove in order to prevent sealing ring moving in axial direction. The fastening device is composed of a fixing key, outer groove and inner groove. The outer groove is set at the internal face of pump case in axial direction. The inner groove is set at the external face of sealing ring in axial direction. The fixing key is set between outer and inner grooves. This invention has small size in radial direction. The sealing device is widely applied. It is convenient to assemble and repair. The service life is long.

The invention discloses an open sleeve antenna. An antenna oscillator is a columnar metal rod, wherein a metal sleeve is a tubular open sleeve which penetrates up and down; the metal sleeve surrounds the outer side of an antenna body; the central axis of the metal sleeve coincides with that of the antenna oscillator; an insulating medium fills the gap between the outer lateral wall of the antenna oscillator and the inner lateral wall of the metal sleeve; the insulating medium fixes the antenna oscillator and the metal sleeve together to form a sleeve antenna structure; and the sleeve antenna structure and an SMA joint are embedded into a metal grounding box. By the open sleeve, the open sleeve antenna adapts to the general dimension of a handheld antenna floor, and partially eliminates the influence on the standing-wave ratio of a low-frequency part of the antenna when utilizing a non-open sleeve; the capacitive reactance of an electronically small antenna is counteracted by loading a lumped-parameter inductor at a feeding port; and the stepped antenna oscillator, equivalent to top loading for overall impedance matching, achieves the characteristics of miniaturization, large bandwidth and the like.

The invention discloses a polyethylene / polybutene thermoplastic elastomer alloy material and a preparation method thereof. The material contains, by mass, 5 to 98.9 parts of polybutene, 1 to 80 parts of polyethylene and 0.1 to 20 parts of an ethylene-butylene copolymer. According to the invention, the polyethylene / polybutene thermoplastic elastomer alloy material is synthesized through multi-stage sequential polymerization in virtue of a titanium and / or vanadium-loaded catalyst; after prepolymerization of ethylene, a section of bulk polymerization is carried out to produce a polyethylene particle with activity so as to continue initiation of polymerization of butylene-1, and a polyethylene shell can prevent adhesion of polymer particles in the process of polymerization of butylene-1; then bulk polymerization of ethylene and butylene-1 are further and successively carried out; and the above-mentioned operations are cyclically carried out. Cyclic operations of sequential polymerization enable good porosity of particles to be maintained, thereby allowing high polymerization activity to be maintained, and the cyclic operations also allow the content of the ethylene-butylene copolymer to be increased; and the prepared polyethylene / polybutene thermoplastic elastomer alloy material inherits the advantages of excellent shock resistance, heat resistance and creep properties of polybutene and high modulus and the like of polyethylene.

The invention discloses a microalgae cultivation system mainly comprising a microalgae pretreatment pond, a black heat absorption pad, a tubular membrane system and an algae liquid collecting and aftertreatment pond, wherein the microalgae pretreatment pond is used for adding nutritive salt and receiving algae seeds; the black heat absorption pad is paved below the tubular membrane system and used for absorbing solar energy to increase water temperature and reduce scattering and diffusion light; the tubular membrane system is composed of a plurality of tubular membranes, one end of the tubular membrane system is connected with a pump membrane connector, the other end of the tubular membrane system is an exhaust port, the pump membrane connector is used for connecting a water pump and the tubular membranes, the exhaust port is arranged at the tail ends of the tubular membranes, is formed by mutually nesting two rings and can be fixed, and the horizontal plane of the port is higher than the tubular membrane system so as to prevent algae liquid from overflowing; the algae liquid collecting and aftertreatment pond is used for the collection and the aftertreatment of the algae liquid; and the large-scale cultivation of the microalgae can be realized under an optimized physicochemical condition through slowly filling the algae liquid to be cultivated in the microalgae pretreatment pond into the tubular membrane system. The microalgae cultivation system has the characteristics of low cost, convenience and flexibility in use, simple structure, easiness in implementation, capability of meeting the requirement for large-scale industrial microalgae cultivation and the like.

The invention discloses a method for producing low-molecular chondroitin sulfate by a catalytic process, which comprises the following steps: (1) boiling with water; (2) steaming; (3) enzymolysis; (4) alcohol precipitation; (5) catalysis; (6) ultrafiltration; (7) alcohol precipitation; and (8) dehydration and drying. By using the catalyst Cu / ZSM-5 molecular sieve to degrade the chondroitin sulfate, the method has the advantages of mild and controllable conditions, fewer residual metal ion impurities in the degraded solution and no need of ion exchange resin removal, is simple to operate in the production process, and is suitable for large-scale production; and the product quality is stable, and the chondroitin sulfate recovery rate is up to higher than 80%.

The invention discloses a multifunctional portable medical trolley. The multifunctional portable medical trolley comprises a trolley body, wherein the trolley body comprises a bottom frame, a main frame and a support, the main frame and the support are hinged to the two ends of the bottom frame, the main frame and the support comprise a main bracket and a branch bracket which are hinged to the two ends of the bottom frame through hinge mechanisms respectively, a leaning frame and a back frame are detachably connected to the main bracket and the branch bracket, a seat plate frame is detachably and rotationally connected to the back frame, and self-locking universal wheels are mounted on the hinge mechanisms at four corners of the bottom frame. The invention aims to provide the multifunctional portable medical trolley which is convenient and quick to disassemble and assemble, low in cost, flexible to deform and multifunctional.

The invention discloses a mobile phone rear cover lock and relates to a lock. In order to prevent a mobile phone from being stolen, a traditional axis type lock cylinder is abandoned, lock codes and key codes are fully distributed in the three dimensions of the space, key code needle rods are directly adopted to push lock code needle rods, high secret key amount which is over trillions is achieved, microminiaturization is achieved, no key groove is needed, and a lock cylinder is high in strength. According to the lock cylinder technology adopted by the invention, a screw lock code sieve and alatch honeycomb are tightly adjacent to each other, many holes are formed in the screw lock code sieve in a two-dimensional arrangement mode, the lock codes different in code number are contained in the holes, and then a three-dimensional layout of the lock codes is formed; many nests are arranged in the latch honeycomb in a two-dimensional mode, and latches and springs are contained in the nests;and a bolt opening is formed in a mobile phone rear cover, a threaded hole and an axial hole are formed in a framework of a mobile phone, the latch honeycomb is polygonal and corresponds to the axialhole, and the outer edge of the screw lock code sieve is in a lead screw shape and is engaged with the threaded hole for locking.

The invention provides a three-dimensional code bolt self-tightening lock and relates to a lock. In order to overcome the defects of low key quantity, low strength of lock cylinder materials and fragile locking tongue modes of existing mechanical locks, traditional axial-core lock cylinders are abandoned, lock codes and key codes are fully distributed in three dimensions of space, and key code needle bars are directly used for pushing lock code pin bars to obtain a lock cylinder with a high key quantity of more than a trillion and high strength. According to an adopted lock cylinder technology, lock code screens are closely attached to embolism honeycombs, a plurality of holes arrayed in a two-dimensional mode are formed in the lock code screens and filled with the lock codes with a plurality of code numbers to form a three-dimensional layout of the lock codes, and a plurality of nests arrayed in a two-dimensional mode are formed in the embolism honeycombs and filled with embolisms andsprings. The lock screens are connected with a screw shaft rod, the screw shaft rod is divided into a shaft rod part and a screw part, the screw part and a screw hole component are engaged and locked, oblique tooth pads are arranged between the shaft rod part and the screw part, the rear ends of the embolism honeycombs are provided with oblique tooth surfaces, and the oblique tooth surfaces are matched with the oblique tooth pads.

The invention relates to a self-governing underwater vehicle and particularly relates to a low-noise separation mechanism for separating an appendage of a self-governing underwater vehicle. The low-noise separation mechanism comprises a machine body, a hot working action mechanism, a connecting buckle, a torsion spring pin shaft, a connecting clamping tongue, an upper wedge block and a lower wedge block, wherein the torsion spring pin shaft is mounted on the machine body, the connecting buckle is hinged to the torsion spring pin shaft, one end of the connecting buckle is hung on one end of the connecting clamping tongue, the other end of the connecting clamping tongue is connected with the appendage through connecting fixing bands, the other end of the connecting buckle is connected with the upper wedge block, and the lower wedge block is located below the upper wedge block; the hot working action mechanism is mounted on the machine body, and the output end of the hot working action mechanism is connected with the lower wedge block to drive the lower wedge block to move back and forth relative to the upper wedge block; and the machine body is connected with a main body of the self-governing underwater vehicle through the connecting fixing bands. According to the low-noise separation mechanism provided by the invention, the hot working action mechanism is small in explosive payload and cannot be broken, so that the fast separation of the appendage and the self-governing underwater vehicle can be realized, and meanwhile, separation noises are greatly lowered.

The invention discloses a simple single crystal furnace and a control method thereof. The simple single crystal furnace comprises a vertical tube furnace and a movement control system, wherein the vertical tube furnace comprises heating components, quartz taper tubes, quartz supports and a vacuum pump; holes for accommodating the quartz taper tubes are formed in the quartz supports, the quartz taper tubes penetrate through the holes in the quartz supports, the vacuum pump is connected with a flange at one end of a furnace tube, and a flange at the other end is connected with other protective gases (containing argon, nitrogen and the like), so that the inside environment of the furnace tube keeps an inert environment (in necessity) and the outside environments of the quartz taper tubes keep the inert environment (in necessity). The provided simple single crystal furnace is low in manufacture cost, occupies a small land area and is simple to operate. The single crystal growth principle is the Bridgeman method. Multiple kinds of large single crystals have been produced by means of the simple single crystal furnace, and the simple single crystal furnace has the effect equivalent to or even superior to the growth effect of a professional single crystal furnace.

The invention provides a mobile phone card holder lock, and relates to locks. In order to prevent a mobile phone from being stolen, the mobile phone card holder lock abandons a traditional axial coretype lock cylinder and has full layout of lock codes and key codes in the three dimensions of space, and a lock code needle bar is directly pushed by a key code needle bar to reach more than a trillion of high secret key amount, miniaturization, no key grooves and a high-strength lock cylinder. A lock cylinder technology is adopted by the mobile phone card holder lock, code locking sieves and latch honeycombs are closely adjacent, a plurality of holes are formed in the code locking sieves according to a two-dimensional arrangement manner, the lock codes with a plurality of code numbers are installed in the holes to form three-dimensional arrangement of the lock codes, a plurality of nests are formed in the latch honeycombs according to a two-dimensional arrangement manner, latches and springs are installed in the nests, screw holes are formed in the frame of the mobile phone, the code locking sieves are connected with a screw shaft lever to lock with the screw holes in a meshing mode,the code locking sieves rotate relative to the latch honeycombs, and the latch honeycombs and a mobile phone card holder can move axially.

The invention discloses a controllable slope type microalgae cultivation system and a microalgae cultivation method thereof. The system mainly comprises a microalgae pretreatment tank, a controllable slope type self-flow automatic temperature raising microalgae cultivation device on which a heat absorption coating is coated, and a microalgae liquid collection and aftertreatment tank; the controllable slope type self-flow automatic temperature raising microalgae cultivation device is arranged on an inclined surface with the slope ratio of 1 to 5 percent; the heat absorption coating is coated on the inner walls of straight pipes and U-shaped pipes, which are near one side of the inclined surface; the straight pipes and the U-shaped pipes form the controllable slope type self-flow automatic temperature raising microalgae cultivation device; each U-shaped pipe is provided with a carbon dioxide air inlet; two ends of each straight pipe are provided with valves; each straight pipe is also provided with an oxygen discharging hole; the tail end of the controllable slope type self-flow automatic temperature raising microalgae cultivation device is provided with a flow controller; primary microalgae liquid in the pretreatment tank is led into the controllable slope type self-flow automatic temperature raising microalgae cultivation device, so microalgae is collected and cultivated for 12 to 24 hours periodically; the system can cultivate the microalgae on scales, has a simple basic structure, is easy to implement, and can meet the industrial cultivation requirement of the microalgae.

The invention relates to an axial positioning structure. The axial positioning structure comprises an annular slot which is arranged on an outer stretching end of a shaft, two half bushing brushes which are embedded in the annular slot, a sleeve ring which is sleeved outside the two half shaft bushings and an elastic retainer ring, wherein a retainer ring slot which is arranged outside and a limiting step which is arranged inside are arranged on outer circumferential surfaces of the two half shaft bushings; the elastic retainer ring is blocked in a retainer ring slot; and the sleeve ring is arranged between the elastic retainer ring and the limiting step. The axial positioning device solves the technical problem that the current axial positioning structure is difficult to mount and dismount, and a locking gasket is easily damaged in a dismounting process, has a small integral axial dimension, a large bearing axial force, a broad application range, high reliability, and is convenient to mount, change and maintain. The axial positioning device is very convenient to mount, change and maintain as the base structure is simple.

The invention discloses an ultra-wideband electromagnetic super-surface circular polarizer, which comprises a dielectric substrate, a metal resonance array and a metal grounding plate, wherein the metal resonance array is printed on the top surface of the dielectric substrate; the metal grounding plate is printed on the back surface of the dielectric substrate; the metal resonance array comprises a plurality of micro-crack Jerusalem cross units which are arranged in a periodic matrix; each micro-crack Jerusalem cross unit is equal in structure parameter and comprises two orthorhombic I-shaped metal arms, namely a horizontal I-shaped metal arm extending in the horizontal direction, namely an X axis, of the dielectric surface, and a vertical I-shaped metal arm extending in the vertical direction, namely a Y axis, of the dielectric surface; the center of a horizontal metal wire at the middle part of the horizontal I-shaped metal arm is intersected with the center of a vertical metal wire at the middle part of the vertical I-shaped metal arm; two micro-cracks which run through the horizontal metal wire at the middle part are etched on the horizontal metal wire at the middle part of the horizontal I-shaped metal arm; and the two micro-cracks are symmetrically located at the left side and the right side of the vertical metal wire at the middle part of the vertical I-shaped metal arm. The ultra-wideband electromagnetic super-surface circular polarizer has the characteristic of high working frequency.

The invention relates to a lock, in particular to a three-dimensional code nut lock. In order to overcome the defects that an existing mechanical lock is low in key scale, and the material of a lock cylinder is low in strength, a traditional axis type lock cylinder is abandoned, lock codes and key codes are fully laid out in three spatial dimensions, a key code needle bar is directly used for pushing a lock code needle bar, and a large key scale of trillions and a high-strength lock cylinder are achieved. According to the lock cylinder technology adopted in the invention, a lock code sieve anda bolt honeycomb are tightly attached, the lock code sieve is provided with a plurality of holes in a two-dimensional arrangement mode, the holes contain lock codes in multiple code numbers, three-dimensional layout of the lock codes is formed, the bolt honeycomb is provided with a plurality of concaves according to a two-dimensional arrangement mode, the concaves contain bolts and springs, a screw hole is formed in the center of the bolt honeycomb, an axial hole is formed in the center of the lock code sieve, one end of a lock beam is provided with an axial portion, the other end of the lockbeam is provided with a screw end, the axial hole is matched with the axial portion, and the screw hole is engaged with the screw end.

The invention discloses a three-dimensional code nut ring latch, and relates to a lock which overcomes the defects of the low key strength of an existing mechanical lock and the small material strength of the lock core. The three-dimensional code nut ring latch gives up a traditional shaft type key cylinder, in three dimensions of a space, a lock code and a key code are fully distributed, and thekey core is directly used for pushing a lock core needle rod to reach more than one trillion high key quantity and high strength lock core. The lock core technology adopted is that a lock core screenattaches tightly with an embolus honeycomb, the lock core is provided with holes in an arrangement mode of two dimensions; the holes are internally provided with multiple lock cores with a variety ofcore numbers to form a three dimensional layout of the lock cores; the embolus honeycomb is provided with multiple nests in an arrangement mode of the two dimensions; the nests are internally providedwith embolus and springs; the center of the embolus honeycomb is provided with a threaded hole; the center of the lock core screen is provided with an axial hole; one end of a lock beam is provided with an axial part, and the other end of the lock beam is provided with a screw end; the axial hole is matched with the axial part; and the screw hole is meshed with the screw end.

The invention provides a photon matrix vector multiplier which solves the problems that an existing photon matrix vector multiplier is sensitive to process errors and is difficult to expand on a large scale. The photon matrix vector multiplier comprises a light source, an input beam splitter, an input modulator array, a first multi-stage diffraction network, an intermediate modulator array, a second multi-stage diffraction network and a detector array which are arranged in sequence, the input modulator array comprises N first modulators; the intermediate modulator array comprises N second modulators; the detector array comprises N detectors; the first multi-stage diffraction network comprises M stages of first photon distribution units, each stage of first photon distribution unit comprises a first optical splitter and a first phase modulator array, the second multi-stage diffraction network comprises M stages of second photon distribution units, and each stage of second photon distribution unit comprises a second optical splitter and a second phase modulator array. The structure provided by the invention has the advantages of being insensitive to process errors, high in realizability, easy to integrate and the like.

The invention provides a three-dimensional code bolt lock and relates to a lock. In order to overcome the defects of low key quantity, low strength of lock cylinder materials and fragile locking tongue modes of existing mechanical locks, traditional axial-core lock cylinders are abandoned, lock codes and key codes are fully distributed in three dimensions of space, and key code needle bars are directly used for pushing lock code pin bars to obtain a lock cylinder with a high key quantity of more than a trillion and high strength. According to an adopted lock cylinder technology, lock code screens are closely attached to embolism honeycombs, a plurality of holes arrayed in a two-dimensional mode are formed in the lock code screens and filled with the lock codes with a plurality of code numbers to form a three-dimensional layout of the lock codes, a plurality of nests arrayed in a two-dimensional mode are formed in the embolism honeycombs and filled with embolisms and springs, the lock screens are connected with a screw shaft rod, the screw shaft rod is divided into a shaft rod part and a screw part, the outer surface of each embolism honeycomb is polygonal to cooperate with a corresponding axial hole component, and the screw part is fixedly meshed with a screw hole component.

The invention discloses a three-dimensional code bolt-external lock, and relates to a lock. In order to overcome the defects that existing mechanical lock secret key amount is small, the lock cylindermaterial strength is small, and the spring bolt manner is weak, a traditional axis type lock cylinder is abandoned, lock codes and key codes are sufficiently distributed, a key code needle rod directly pushes a lock code needle rod, and the high-strength lock cylinder with the higher than trillion high secret key amount is achieved. A lock cylinder technology is adopted, a lock code sieve and a bolt honeycomb are tightly attached, many holes are distributed on the lock code sieve according to a two-dimensional manner, lock codes with multiple code numbers are installed in the holes, and three-dimensional distribution of the lock codes is formed; and many nests are arranged in the bolt honeycomb according to a two-dimensional manner, bolts and springs are installed in the nests, a screw shaft rod is connected to the lock code sieve and is divided into a shaft rod part and a screw part, the outer surface of the bolt honeycomb is polygonal, the screw part and a screw pipe are meshed andlocked in cooperation with a corresponding axial pipe, and fastening pieces can be connected to the outer edges of the axial pipe and the screw pipe.

The invention discloses a novel intelligent omni-directional treadmill, belonging to the field of treadmills. The novel intelligent omni-directional treadmill comprises a driving unit with a universal transmission function and a support platform for supporting a user, wherein a control panel is arranged above the support platform; a detection unit for detecting the foot movement of a runner is arranged on the edge of the support platform; multiple power output holes are formed in the support platform; a driven unit is arranged in the support platform and comprises a support frame and support rods arranged on the support frame; and the top ends of the support rods are positioned in the power output holes. In the invention, the power of the driving unit is transferred to the support platform through the driven unit, and the user can freely change the running direction and increase / reduce the running speed.

The invention provides a sample cell, and the sample cell provides for holding a sample to be placed in the cryogenic cooling environment. The sample cell comprises an airtight, openable and closable housing (101). A sample base (102) for receiving a sample is within the housing. A refrigeration accessory (103) is provided for attaching the sample cell to a refrigeration body of a cryogenic cooling environment. The sample cell includes a thermal connection (104) between the sample base (102) and the refrigeration accessory (103). One or more hermetic connectors (105) are provided for establishing an electrical connection between the interior and exterior of the housing (101).

A wheel type tobacco plant spacing positioner comprises a support, wherein a front wheel is mounted at the front end of the support; a threaded hole is formed in the front wheel, a hole drilling mechanism is in threaded connection with the front wheel through the threaded hole, and the circumference perimeter of the front wheel is 50-55 cm or 55-60 cm. According to the wheel type tobacco plant spacing positioner, fixed spacing markers can be made by mounting the hole drilling mechanism on the front wheel, so that tobacco leaves in a field grow consistently, ripening and harvesting are facilitated, and high-quality tobacco leaves can be produced.

The invention relates to an automatic reset leak-protection air injection system which is capable of settling the technical problems that the pumping speed of the vacuumizing devices of existing common centrifugal pumps is very slow, the size is big, the reliability is poor, the service life is short, the application scope is limited, etc. The system comprises an air inlet pipe through which the compressed air can pass, an exhaust pipe communicating with the exterior environment, a hollow basal body arranged between the air inlet pipe and the exhaust pipe, a negative-pressure device and an automatic reset device arranged inside the basal body and as well as an air inducting device. The utility model has the advantages of small overall radial size, broad application scope of the automatic reset leak-protection air injection system, high reliability, long service life, user-friendly installation and maintenance, etc.

The invention provides a magnetic fluid rheological property test system and method. The test system comprises a motor control part, a torque signal acquisition part, a temperature acquisition part, an excitation part, a shear chamber, a support part, a signal acquisition system and an analysis system. The method includes: adding a to-be-tested fluid into the shear chamber, energizing an excitation coil with direct current to generate a magnetic field so as to change the properties of the to-be-tested fluid; setting the rotation speed of a servo motor, at the same time acquiring the friction torque transferred by the to-be-tested fluid through a torque sensor, collecting the motor rotation speed and torque into an analysis system, and calculating the rheological property parameters of the to-be-tested fluid by means of the shear chamber roller size, the shear chamber gap, the motor rotation speed and the friction torque; and at the same time, testing the properties of the to-be-tested fluid at different temperatures with a temperature sensor mounted in the shear chamber, and feeding back the to-be-tested fluid temperature in real time. The system and the method provided by the invention can measure the properties of some fluid like ferrofluid, magnetorheological fluid and the like under an applied magnetic field condition, and provide the property parameters of the test fluid for analysis, calculation and design.