61results about How to "Has a modular feature" patented technology

The invention relates to a low-pollution combustion chamber provided with a premixing and pre-evaporating ring pipe, which adopts a single-ring cavity structure and consists of a combustion chamber outer casing, a combustion chamber inner casing, an outer flame tube, an inner flame tube and a combustion chamber head part, wherein air used for combustion completely enters into the flame tubes from the combustion chamber head part; the scheme of fractional combustion can be adopted, and pre-combustion stage and a main-combustion stage are divided; the main-combustion stage comprises the premixing and pre-evaporating ring pipe, a main-combustion stage nozzle and a main-combustion stage swirler; fuel oil is evaporated and mixed inside the premixing and pre-evaporating ring pipe and then enters into the flame tubes after forming even mixed combustible gas, belonging to premixed combustion; a fuel nozzle is used for supplying the fuel oil for the pre-combustion stage and the main-combustion stage; the stable working range of the combustion chamber is mainly controlled by the pre-combustion stage, so that the stable combustion can be ensured to be carried out in the combustion chamber within wider working range, and a stable ignition source can be provided for the main-combustion stage; the pollution emission is mainly controlled by the main-combustion stage, and the equivalent weight ration of the premixed gas of the main-combustion stage can be controlled within the low-pollution combustion range, so that the pollution emission of the whole combustion chamber cam be ensured to be greatly reduced. The premixing and pre-evaporating structure has small size, simple structure and modularized characteristic, can reduce the pollution emission of the combustion chamber of an aircraft engine, and ensures good combustion stability.

The invention discloses an intelligent warehousing system which comprises a warehousing system and a transferring system. The warehousing system has modularization characteristics, a plurality of warehousing units which are stacked together can be spliced to be in different shapes at will so as to adapt to irregular warehousing spaces of workshops, each warehousing comprises a stacking support, parallel roller supports are arranged on the left and right sides of each stacking support, and a rotating roller is arranged between every two corresponding roller supports in a spaced manner and is provided with a warehousing driving mechanism; the transferring system comprises a transferring rail and a transferring walking trolley, the transferring walking trolley is provided with a transferringmechanism, the transferring mechanism comprises a stand column fixedly installed on the transferring walking trolley, the stand column is provided with a sliding barrel in sliding fit with the stand column, and a lifting mechanism is arranged on the stand column; the sliding barrel is fixedly provided with a transferring unit, the transferring unit comprises a transferring base which is provided with a cargo carrying plate, and a cargo carrying driving mechanism is arranged on the transferring base; and a conveyor belt mechanism is arranged on the cargo carrying plate. The invention further discloses a digital twinborn visualization sense control system.

A unit-type external-pressure hollow fibre membrane module used for biological membrane reactor is composed of frame, tree-type membranes, filtered liquid outlet pipe, and air distributing pipe. A single tree-type membrane consists of top and bottom ends, and external-pressure hollow fibre membrane between both ends. Multiple membrane are parallelly connected via water collecting tube to form a tree-type membrane frame. Multiple air distributing pipes are parallelly connected to form an air distributing pipe frame. Both frames are alternatively arranged. Its advantages are high water output, high strength and high resistance to pollution.

The invention provides a premixing pre-vaporization combustion chamber for a main combustible stage of a discrete pipe. The combustion chamber is in a single annulus structure, and consists of a combustion chamber outer case, a combustion chamber inner case, a flame tube outer wall, a flame tube inner wall and a combustion chamber head, wherein combusting air completely enters a flame tube from the combustion chamber head, a staged combustion scheme, namely a pre-combustible stage and the main combustible stage, is adopted; a swirl cup is adopted in the pre-combustible stage which is of a diffusion combustion organization mode; a premixing pre-vaporization device is adopted in the main combustible stage, a main combustible stage nozzle supplies fuel axially, the fuel is vaporized in the premixing pre-vaporization device and blended with air, the uniformly mixed combustible gas enters the combustion chamber to participate in combustion, namely a premixing combustion organization mode. The pre-combustible stage controls the range of stable work of the combustion chamber, and provides a stable ignition source for the main combustible stage; and the main combustible stage controls main pollution emission of the combustion chamber, and lower pollution emission of the combustion chamber is realized by controlling the equivalence ratio of premixed gas of the main combustible stage. The premixing pre-vaporization device has a simple structure, and can realize that the pollution emission of an aircraft engine combustion chamber can be reduced on the basis of not influencing the combustion stability.

The invention provides a three-stage structured pre-mixing and pre-evaporating low-pollution combustor which is in a single annular cavity structure and comprises a diffuser, an outer combustor case, an inner combustor case, an outer combustion liner wall, an inner combustion liner wall and a combustor head, wherein all the air for combustion enters a combustion liner from the combustor head; the combustor head adopts a multi-stage combustion scheme which includes one precombustion stage and two main combustion stages; a premixed combustion mode is used for the main combustion stages; and a diffusion combustion mode with stable cyclone is used for the precombustion stage. The main combustion stage is structurally divided into two stages, thus avoiding the increase of pollutant emissions caused by poor main-stage oil and gas mixing during stage transfer under the condition of one main combustion stage, and simultaneously reducing the pollutant emissions by 30% in the working condition without affecting combustion stability. The combustor has a simple structure; and pollutant emissions generated in the whole landing and take-off (LTO) cycle of the aero-engine combustor is further reduced without affecting combustion stability.

The invention provides a method for understanding and tracking control of a three-dimensional path of an under-actuated autonomous underwater vehicle. The method comprises steps of 1, understating a three-dimensional path obtained by the global path planning is understood as a spatial straight line segment sequence; 2, describing a spatial straight line segment as a target straight line segment of the autonomous underwater vehicle, making the projection in the inertial coordinate system, forming a two-dimensional straight line in the horizontal plane, and forming depth and height coordinate sequences in the vertical direction; 3, performing tracking control of a single horizontal target straight line segment, the controller adopting a hierarchical structure, a guidance controller located at the upper layer converting the position deviation into the reference heading angle, and a state controller at the lower level converting the heading angle deviation into the rotation execution angle of the control surface; and 4, performing replacement of the target straight line segment, completing tracking of each target straight line segment, and finally realizing the three-dimensional path tracking. The method is applicable to under-actuated autonomous underwater vehicle for remote navigation and investigation, and has a certain anti-ocean current disturbance capability.

The preset invention discloses a three-dimensional scanning laser radar based on one-dimensional optical phased array, the radar comprises a transmitting end, a coherent receiving end, and a non-coherent receiving end, all of which are one-dimensional arrays. The radar reduces phase control complexity of a three-dimensional scanning phased array and avoids using costly tunable lasers and grating array antennas with large crosstalk. The radar still has significant advantages in speed and integration level of a pure solid state three-dimensional scanning scheme, and has very high practical value.

The invention relates to a pre-mixing and pre-evaporation low-pollution combustion chamber with a double-oil-way four-rotational-flow pre-film type main combustion stage. The combustion chamber is of a single-ring-cavity structure, and adopts a central staged combustion mode, wherein the head of the combustion chamber is divided into a preliminary combustion stage and a main combustion stage, the preliminary combustion stage adopts a mode of combining diffusive combustion with rotational-flow pre-mixing combustion, and is capable of reducing pollutant discharge under low-flow working conditions while ensuring combustion stability; the main combustion stage adopts a mode of pre-mixing and pre-evaporation combustion, and is capable of effectively reducing combustion pollutants. The oil way of the main combustion stage is divided into two stages, fuel oil in each stage forms an oil film on a pre-film plate, and the oil films are atomized, evaporated and blended under the action of two rotational flows to form a uniform oil-gas mixture, thus facilitating reduction for the combustion pollutants; due to the double-oil-way design, the one-stage working of the main combustion stage under low-flow and medium-flow working conditions such as entrance, and the two-stage working of the main combustion stage under high-flow working conditions such as take-off can be met, thus facilitating the oil-gas matching of the combustion chamber under different working conditions, and further reducing the pollutant discharge level of the whole landing and take-off circulation of the combustion chamber of an aeroengine.

The invention provides a bionic multi-foot walking robot and a robot leg and belongs to the field of leg robots. In order to solve the problem that the existing leg robot is complicated in structure and control, the robot utilizes the characteristic of control of a plurality of pairs of legs on the same side driven by a single motor, so that the robot is simple in structure and control and walks stably. The robot comprises a walking device and a robot main body arranged above the walking device, wherein the walking device is divided into walking unit sets arranged oppositely left and right; each walking unit set comprises a plurality of groups of pairwise robot legs arranged side by side; and a shock-absorbing device is mounted above the walking device and the main body of the robot. The robot is applied to detection, reconnaissance and operation in a hazardous operation environment and is applicable to material transportation and the like in various complicated terrains.

The invention provides a linear type intersected belt type sorting machine. The linear type intersected belt type sorting machine comprises a sorting machine frame, sorting road junctions and a machine body running on guide tracks, wherein the two parallel guide tracks are mounted on two inner sides of the sorting machine frame; the machine body comprises chain plate shells, a miniature electric drum, a common drum, a supporting plate, tensioning bolts, lateral wheels, supporting wheels and a belt driven by the miniature electric drum; the miniature electric drum is mounted on the chain plate shell at one end of the machine body; the common drum is mounted on the chain plate shell at the other end of the machine body; the lateral wheels and the supporting wheels are mounted on the outer sides of the chain plate shells; the supporting wheels roll on the guide tracks; and two ends of the supporting plate are respectively connected with the chain plate shells by bolts. Parcel loading amount of the unit length of the sorting machine can be increased, the components cannot be worn easily, noises are small, the structure is simple, the sorting machine is convenient to repair, the frame is short, and the turning radius in a vertical plane is small.

An LNG and aviation kerosene dual fuel combustor of an aero-gas turbine comprises a combustion area which comprises a precombustion area and a main combustion area, the outer boundary of the combustion area is provided with an inner flame tube wall, the inner boundary of the combustion area is provided with an outer flame tube wall, the front of the combustion area is provided with a combustor head, and the combustor head is connected with the inner flame tube wall through a head end wall. The LNG and aviation kerosene dual fuel combustor of the aero-gas turbine has the advantages that a center staged combustion concept is adopted, two kinds of fuel can be applied simultaneously, a precombustion level which adopts gas fuel provides a stable ignition source and reduces pollutant emissions, low pollution combustion is achieved through a main combustion level, pollutant emission is reduced, and the stability of the aero-gas turbine combustor can be guaranteed simultaneously; a double-ring cavity combustor structure is adopted, air used for combustion is all fed from the head, a flame tube is only provided with a dilution hole and a necessary cooling hole, the modularization feature is achieved, the combustion structure is simplified, and a premixed pre-evaporation loop structure is simpler and easy to process.

The invention discloses a high-power semiconductor laser array wavelength locking and line width compression device and a method. The device comprises a semiconductor laser array, a beam shaping system, a partial reflection mirror and a dispersion optical element. The laser emitted by each bar of the semiconductor laser array is collimated by the corresponding beam shaping system and then output in parallel. The parallel laser beams are respectively incident to the corresponding partial reflectors. One part of light in each laser beam is reflected by the corresponding partial reflector, then is sequentially reflected by other subsequent partial reflectors of the reflection light path and finally enters the dispersion optical element; diffracted light returns along an original path and enters each bar of the semiconductor laser array again after being reflected by each partial reflector, and each bar, the light beam shaping system corresponding to each bar, part of reflectors and the dispersion optical element form an external cavity structure together. According to the method, strict consistency of emergent wavelengths of different light emitting sources can be ensured, and accurate wavelength locking and ultra-narrow linewidth spectrum output are easy to realize.

The invention discloses a vehicle-mounted autonomous charging platform for an unmanned aerial vehicle, belonging to the technical field of unmanned aerial vehicles. The vehicle-mounted autonomous charging platform comprises a roof hangar, a take-off and landing boss and a quad-rotor unmanned aerial vehicle which are mounted in the roof hangar, and a charging interface device matched with the unmanned aerial vehicle and the take-off and landing boss, wherein an electromagnet array is arranged at the bottom of the take-off and landing boss and used for tightly adsorbing landing legs of the unmanned aerial vehicle; and the unmanned aerial vehicle comprises a controller, the controller is divided into a position controller and an attitude controller, and position stabilization and attitude stabilization of the unmanned aerial vehicle are respectively controlled by calculating resultant external force and resultant external torque generated by the unmanned aerial vehicle. The autonomous charging platform is further provided with a circuit system; when the unmanned aerial vehicle is charged, the controller measures voltage every 0.1 s, on-off information of a charging circuit is indirectly obtained, and if the charging circuit is disconnected, the controller controls the unmanned aerial vehicle to adjust posture again until the charging circuit is closed again to continue charging. According to the invention, a requirement on the pose accuracy of the unmanned aerial vehicle is reduced, and the robustness and success rate of autonomous landing are improved.

Provided is a low-pollution combustion chamber adopting forced diversion at a main-combustion-stage outlet. The emission level of LTO circulating pollutants can be lowered, and the ignition performance of the combustion chamber is improved. A fuel nozzle supplies all fuel to the combustion chamber, main-combustion-stage fuel is sprayed into an inner channel of a main-combustion-stage pre-film plate, part of fuel forms main-combustion-stage straight spray oil mist, part of fuel is sprayed to the main-combustion-stage pre-film plate to form an uniform oil film, breaking and atomization are conducted under the two-path rotational flow shear effect of the pre-film plate inner channel and a pre-film plate outer channel to from main-combustion-stage pneumatic atomized oil mist, the oil mist and the air are mixed to form an uniform oil-air mixture, and the oil-air mixture enters a flame tube for pre-mixing combustion; and a main-combustion-stage outlet diversion ring is mounted at the main-combustion-stage outlet, the longitudinal section of the outer side of the outlet diversion ring is in a smooth arc line, the arc line is inward in the radial direction and extends forwards in the axial direction, the radial height of the arc line is not larger than 1 / 2 of the penetration depth of the main-combustion-stage straight spray oil mist so that the main-combustion-stage air flow can form expanding flowing, and a full center backflow region is formed.

The invention discloses a double-pre-film pneumatic nebulization low pollution combustor head structure. Combustion is organized in a combustor head in a center classification mode. The combustor head structure is divided into a main combustion level and a pre-combustion level. The pre-combustion level is of a double-level swirl cup structure, combustion is organized in a partially premixing mode, and the requirements for combustion stability and pollutant discharge of small working conditions are met. The main combustion level is of an axial swirler double-pre-film structure, combustion is conducted in a combustor in a premixing mode, and combustion pollutants can be effectively reduced through premixing combustion. The double-pre-film type main combustion level structure comprises two stages of independent oil collecting rings, two stages of axial swirlers and two stages of pre-film plate structures. Each stage of independent oil collecting ring is provided with a plurality of beveled fuel injection holes. Each stage of fuel is injected out through the fuel injection holes and then strikes the pre-film plates to be expanded into oil films. The structure is beneficial for fuel classification of the whole combustor under different working conditions, ensures reasonable oil-gas distribution, and further reduces the pollutant discharge level in the whole cycle of landing and taking off of the combustor of an aero-engine.

The invention relates to a convolutional neural recognition system and method based on ARM and FPGA, and the system comprises: a convolutional neural network parameter training module which is used for obtaining the model parameters of a convolutional neural network; an ARM chip which is used for receiving and forwarding the model parameters and transmitting an identification result to display equipment; and an FPGA convolutional neural network hardware module which is used for achieving all convolutional neural networks with the model parameters from an input layer, a convolutional layer, a pooling layer, an activation layer to a full connection layer in a hardware circuit mode, performing forward prediction operation on the image flow input in real time, achieving image identification classification and outputting an identification result. Compared with the prior art, the system has the advantages of low cost, low power consumption, high operation speed and the like.

The invention discloses a low-pollution combustion chamber adopting forced diversion at the primary combustion stage outlet, which adopts a single ring cavity structure and comprises a diffuser, a combustion chamber outer casing, a combustion chamber inner casing, a flame tube outer wall, a flame tube inner wall and a combustion chamber head, wherein the combustion chamber adopts a staged combustion scheme, and is divided into a precombustion stage and a primary combustion stage; and the precombustion stage adopts a cyclone-stable diffusion combustion / cyclone premixed combustion combination mode. By adopting the central staged structure, the precombustion stage structure is simple. The primary combustion stage adopts the axial cyclone matched with the prefilming plate structure to enhance the fuel premixing and preevaporation, so that the pollution discharge of the whole landing-takeoff circulation of the aircraft engine combustion chamber is further lowered. Particularly, the primary combustion stage outlet is provided with an air forced diversion ring, so that the primary combustion stage air forms a divergent flow, and a full central backflow region is formed in the combustion chamber, thereby improving the ignition performance of the central backflow region.

The invention relates to a nano-amplified self-reference probe for in-situ imaging of microRNA (miRNA) in living cells and a preparation method thereof. The probe is formed by encapsulating a nucleicacid hairpin modified upper conversion nanoparticle (UNP-H1) and a fluorescent molecule modified hairpin molecule (H2-F) through a liposome. When the probe enters a cell, UNP-H1 and H2-F are released,and only when H1 is hybridized to the miRNA, H2 can replace the miRNA to hybridize with UNP-H1, and the released miRNA starts the next cycle to amplify a signal. Under excitation of near-infrared light, luminescence resonance energy transfer (LRET) occurs between the emission band 1 (EEB1) and F of the UNP. The luminescence intensity ratio of the LRET and EEB2 channels (ILRET / IEEB2) can be used for relative quantification of intracellular miRNA taking emission band 2 (EEB2) channel of the UNP as a self-reference.

The invention relates to a system and method for inkjet manufacturing of a variable Chipless RFID. The system comprises an inkjet printing head, a function ink material, a sintering device, a mark chasing device, an encoder, a control circuit board, an industrial control machine and a data server. According to the method, the Chipless RFID data scheme stored in the data server is transmitted to the industrial control machine, the industrial control machine converts server data into printing signals so as to be transmitted to the control circuit board, the control circuit board determines the position of a printing base material and the transmission speed according to signals fed back by the mark chasing device and the encoder, a spraying head is controlled to print the function material ink on the base material to form a Chipless RFID line type, the resonance characteristic of the Chipless RFID can be achieved through the sintering device, and due to data online transmission and inkjet printing, Chipless RFIDs are different. According to the system and method, the aim that inkjet printing manufacturing has the unique Chipless RFID is achieved, the Chipless RFID can serve as an independent system and also can serve as an embedding structure of a printing or packaging and other machines.

The invention relates to a wind power / marine energy complementary power generation and wave eliminating device comprising a base, a vertical guide pile, floating boxes, a water turbine type breakwaterand a guide rod; the vertical guide pile is fixedly arranged on the base, the water turbine type breakwater is connected with the vertical guide pile through the floating boxes on the two sides, andthe floating boxes can move up and down along the vertical guide pile; and the water turbine type breakwater includes a water turbine power generation system, a wind power generation system and an oscillating float type power generation system. The wind power / marine energy complementary power generation and wave eliminating device has the advantages that the breakwater and the power generating device are skillfully combined, the advantages of avoiding pollution and being easy to assembly, high in energy conversion rate, capable of achieving mass production and the like are achieved, and the wind power / marine energy complementary power generation and wave eliminating device is suitable for use and popularization.

The invention relates to a power-assisted umbrella head for a tent. The power-assisted umbrella head for the tent comprises an upper umbrella head and a lower umbrella head, wherein the lower umbrellahead can be moved axially relative to the upper umbrella head, a tent frame rod is pivotally connected to the upper umbrella head through a connecting piece, one end of a tent support rod is hinged to the connecting piece, and the other end of the tent support rod is hinged to the lower umbrella head to form a triangular support structure. The power-assisted umbrella head for the tent also comprises an independent booster assembly. The booster assembly comprises a sleeve, an elastic member and a clip member, wherein the elastic member is pre-tensioned by the clip member and enclosed in the sleeve, the sleeve is detachably and fixedly connected to the upper umbrella head, the lower umbrella head slidingly sleeves the sleeve, and the lower umbrella head is compressed axially by the elasticmember driven by the clip member. The umbrella head adopts an independent spring sleeve to independently carry the powerful booster assembly, has modularity features, can be independently assembled, integrally assembled and modularly disassembled and replaced, simplifies installation and replacement procedures, reduces difficulty, guarantees installation accuracy and can be used as a common core component; the booster assembly head assists the tent in a process of opening the tent.

The invention relates to a pre-mixing and pre-evaporation low-pollution combustion chamber with a double-oil-way four-rotational-flow pre-film type main combustion stage. The combustion chamber is of a single-ring-cavity structure, and adopts a central staged combustion mode, wherein the head of the combustion chamber is divided into a preliminary combustion stage and a main combustion stage, the preliminary combustion stage adopts a mode of combining diffusive combustion with rotational-flow pre-mixing combustion, and is capable of reducing pollutant discharge under low-flow working conditions while ensuring combustion stability; the main combustion stage adopts a mode of pre-mixing and pre-evaporation combustion, and is capable of effectively reducing combustion pollutants. The oil way of the main combustion stage is divided into two stages, fuel oil in each stage forms an oil film on a pre-film plate, and the oil films are atomized, evaporated and blended under the action of two rotational flows to form a uniform oil-gas mixture, thus facilitating reduction for the combustion pollutants; due to the double-oil-way design, the one-stage working of the main combustion stage under low-flow and medium-flow working conditions such as entrance, and the two-stage working of the main combustion stage under high-flow working conditions such as take-off can be met, thus facilitating the oil-gas matching of the combustion chamber under different working conditions, and further reducing the pollutant discharge level of the whole landing and take-off circulation of the combustion chamber of an aeroengine.

The invention relates to a low-emission combustion chamber with main combustible stage head part multi-point slant oil taking. A single-ring cavity structure is adopted; the combustion chamber is composed of a combustion chamber outer casing, a combustion chamber inner casing, a flame tube outer wall, a flame tube inner wall and a combustion chamber head part; all the air for combustion enters a flame tube from the combustion chamber head part, a classification combustion scheme is adopted, and is divided into a pre-combustion stage and a primary combustion stage; a diffusion combustion organization mode with stable rotational flow is adopted for the pre-combustion stage, and a premixing combustion organization mode with slant oil supplying is adopted for the main combustible stage; the stable working range of the combustion chamber is mainly controlled by the pre-combustion stage, the stable combustion in the combustion chamber within a wider working range can be ensured, and simultaneously a stable ignition source can be provided for the main combustion stage; and the pollution emission of the combustion chamber is mainly controlled by the main combustion stage, and the equivalent weight ratio of the premixing gas of the main combustion stage is controlled in a low-pollution combustion range, thus the great pollution emission reduction of the whole combustion chamber can be ensured. The premixing and pre-evaporation structure provided by the invention is simple, the favorable combustion stability of the combustion chamber is ensured, and simultaneously the pollution emission is reduced greatly.

The invention provides a moon-pool protection device for flow chocking and wave absorbing. The device comprises two buoys, wherein the two buoys are connected by an intermediate structure to constitute a main body structure of the protection device; the main body structure is fixed by an anchor chain; multiple rows of holes are formed in the intermediate structure along the length direction of theprotection device; multiple flaring water inlet holes are formed in a wave facing side of the main body structure and are uniformly distributed along the axial direction of the buoys; round jet holescorresponding to the flaring water inlet holes are formed above the main body structure; and the flaring water inlet holes are directly connected to the round jet holes. The invention also provides asystem constituted by the multiple moon-pool protection devices for flow chocking and wave absorbing. The device and the system provided by the invention have the beneficial effects that the structure main body is transformed and upgraded rationally; a blade-type flow absorbing device is added on the bottom to further flow absorbing, so the ability for flow chocking and wave absorbing is good; and the device has the advantages such as a simple structure, prevention of pollution, easy assembly, good wave absorbing effects and feasibility in batched production and can be promoted for use.

The invention discloses a pressure reduction power generation device suitable for a floating breakwater. The device comprises an outer frame, a pressure reduction mechanism, an electric energy conversion device and an electric energy storage device, wherein one end of the outer frame is deeply arranged in the floating breakwater, and the other end is exposed out of the floating breakwater; the pressure reduction mechanism is arranged at one end, exposed out of the floating breakwater, of the outer frame for converting wave energy to kinetic energy; the electric energy conversion device and theelectric energy storage device are arranged at the end, extending into the floating breakwater, of the outer frame; the electric energy conversion device is connected with the pressure reduction mechanism and converts kinetic energy of the pressure reduction mechanism into electric energy to be stored in the electric energy storage device. Slamming of waves on the breakwater is ingeniously utilized; wave slamming force is converted into electric energy, damage of waves to the breakwater structure is reduced, the safety of the breakwater is improved, the service cycle of the breakwater is prolonged, meanwhile, an electric energy source is provided for the wave absorbing and traveling dual-purpose floating breakwater and nearby islands, and the device has the advantages of being free of pollution, easy to assemble, capable of being produced in batches and the like.

The invention discloses a lean direct injection low-emission combustor adopting effervescent atomizers. A single-ring cavity structure is adopted in the combustor. The lean direct injection low-emission combustor comprises a diffuser, a combustor outer case, a combustor inner case, a flame tube outer wall, a flame tube inner wall and combustor heads. Fuel oil is atomized into liquid mist which is extremely thin and extremely uniform through the multiple effervescent atomizers, and the liquid mist is directly injected into the combustor for combustion. A staged combustion structure is adopted in the combustor. A sinking design is adopted in a center precombustion stage, and the flame stabilizing function is played; and the flame is stabilized depending on the precombustion stage for primary combustion stages of the periphery of the precombustion stage, and the primary combustion stages start to work according to the needs of the working conditions. The lean direct injection technology is adopted in the low-emission combustor, the fuel oil is injected into the combustor through the multiple effervescent atomizers, and the spatial distribution uniformity of the fuel oil is increased; and the fuel oil is injected through the special effervescent atomizers, and therefore the fuel oil has the good atomizing quality, fuel oil atomizing and mixing are facilitated, distribution uniformity of the fuel oil is further increased, and the combustor has the great potential in reducing pollution emission.

The invention discloses a modular oil film damping test device. A cylindrical upper test piece is sleeved in a sleeve from top to bottom. The upper test piece and the contact surface of the sleeve keep clearance fit. Oil is injected into the gap to form an oil film. The sleeve is supported and fixed on a base through peripheral steps. A dynamic force sensor is fixedly arranged at the axis of the upper end face of the upper test piece. The dynamic force sensor goes upward and is fixedly connected with an excitation rod. A first accelerometer is arranged on the upper end face of the upper test piece. A non-contact micro-displacement sensor and a second accelerometer are arranged on the upper end face of the sleeve. The invention further discloses a modular oil film damping test method. The device provided by the invention has the advantages of simple structure and convenient method implementation, and is of great significance for the scientific research of an oil film damping mechanism and the promotion and application of an oil film damper.

The invention discloses a low-pollution combustion chamber in which the main combustion stage adopts an axial two-stage distributed swirler, adopts a single-ring cavity structure, and includes a diffuser, a casing outside the combustion chamber, a casing inside the combustion chamber, the outer wall of the flame cylinder, The inner wall of the flame tube and the head of the combustion chamber, the combustion chamber adopts a staged combustion scheme, and the combustion head is divided into a pre-combustion stage and a main combustion stage. This combustion method reduces the emission of pollutants under small working conditions without affecting stable combustion; the main combustion stage adopts a premixed pre-evaporative combustion method, which is conducive to uniform combustion. The present invention adopts a centrally graded structure, and the structure of the pre-combustion stage is simple; the main combustion stage adopts a unique axial two-stage distributed swirler, which enhances the mixing of the main combustion stage fuel oil and air, and makes the oil mist distribution more uniform. Therefore, the pollution discharge of the entire landing and take-off cycle of the combustion chamber of the aero-engine is further reduced.

A linear motor comprises two slideways which are arranged in parallel, wherein a group of primary modules are respectively fixed on the inner sides of the two slideways, a linear sliding piece is arranged between the two slideways, two groups of secondary modules which are respectively opposite to the two groups of primary modules are fixed on the outer side of the linear sliding piece, the gaps between the two groups of opposite secondary modules and the primary modules are equal, and the gaps between the secondary modules and the primary modules are adjustable. The motor has the characteristic of adjustable motor gap, and the width of the motor air gap can be adjusted according to specific use requirements, so that large-range adjustment of motor thrust is realized; the air gap adjustingdevice has a modular characteristic, is integrally divided into a primary module, a secondary module, a linear sliding piece and a slideway, can conveniently adjust an air gap through an adjusting mechanism on the linear sliding piece, and is convenient to maintain, repair or disassemble and assemble.

The invention discloses a cable-driven series-parallel palletizing robot with the characteristics of light weight and high bearing capacity. The cable-driven series-parallel palletizing robot comprises a base, an upper connecting rod, a lower connecting rod, a connecting plate, a shoulder joint cable-driven branch chain, an elbow joint cable-driven branch chain, a wrist joint cable-driven branch chain and a mechanical grabbing device. A rotary driving assembly is mounted on the base and drives the base to rotate horizontally; the upper end of the upper connecting rod is connected with the base in a swinging manner through a shoulder joint; the upper end of the lower connecting rod is swingably connected with the lower end of the upper connecting rod through an elbow joint; the connecting plate is swingably connected with the lower end of the lower connecting rod through the wrist joint; the shoulder joint cable driving branch chain drives the upper connecting rod to swing around the shoulder joint; the elbow joint cable driving branch chain drives the lower connecting rod to swing around the elbow joint; the wrist joint cable drives the branch chain to drive the connecting plate to swing around the wrist joint; the mechanical grabbing device is connected with the lower surface of the connecting plate and can rotate. The robot is simple in structure, large in movement range, low in cost and capable of achieving high-speed grabbing and sorting.