36results about How to "Low processing and manufacturing costs" patented technology

The utility model discloses a differential mechanism half axle gear gap detection device, its characterized in that: including work table, measuring mechanism, compacting mechanism, thrust reset mechanism, open mechanism, with the upper positioning assembly and lower positioning assembly of differential mechanism cooperation. The utility model structure has compact overall structure, and strong compatibility, and convenient and fast operation, and adjustment function is convenient, can be suitable for a variety of model differential mechanism half axle gear gap detection, saves production manufacturing cost, and has higher equipment practicality and comprehensive utilization rate simultaneously.

A cable truss, including upper chord cable, lower chord cable, cable clamp, cable clamp support arm, cable end connecting block; the two ends of the cable clamp support arm are respectively provided with a cable clamp, the cable clamp is a cylindrical structure as a whole, which is composed of upper spiral body, middle spiral body and lower spiral body, the joint of the upper spiral body and the middle spiral body is provided with an upper chord cable through hole, and the joint of the middle spiral body and the lower spiral body is provided with a lower chord cable through hole; a plurality of telescopic locking pin shafts are arranged in the upper spiral body and the lower spiral body in the vertical direction, the middle spiral body is provided with locking pin shaft insertion holes corresponding to the locking pin shafts, and the locking pin shafts are inserted and matched with the locking pin shaft insertion holes. The application solves the design problem of the cable net node, reduces the adverse effect of the unbalanced force between the cable nets on the overall structure, increases the force rationality of the node and the safety of the whole cable net, reduces the processing and manufacturing cost and the construction difficulty, and can be applied to the "sky round place" structure of the "Dream of Red Mansions" drama fantasy garden engineering.

The utility model relates to the field of rod and wire short stress rolling mills, in particular to a transmission shaft and speed reducer connecting shaft sleeve which comprises a shaft sleeve body, one end of the shaft sleeve body is provided with a first round hole used for allowing an output shaft of a speed reducer to be inserted, and the other end of the shaft sleeve body is provided with a boss integrally formed with the shaft sleeve body. And a plurality of counterbores which are used for insertion of connecting pieces and are connected with an output shaft of the speed reducer are formed in the axial direction of the boss. The connecting shaft sleeve can be selectively connected with a standard transmission shaft flange, meanwhile, the stress area of a key between the transmission shaft flange and the connecting shaft sleeve is increased, and the possibility that a connecting bolt of the transmission shaft flange and the connecting shaft sleeve is fractured due to overlarge stress is reduced.

The invention discloses an air tightness detection device for a corrugated pipe compensator. The air tightness detection device comprises a first blind flange, a second blind flange, a fastening assembly, a sealing assembly, an air exhaust connecting pipe, vacuumizing equipment, a vacuum gauge, a vacuum baffle valve, a helium mass spectrometer leak detector and an external helium spray gun. The invention also discloses a bellows compensator air tightness detection method. The method comprises the following steps: S1, assembling and sealing; s2, performing initial inspection; s3, vacuumizing is carried out; s4, maintaining pressure and observing; and S5, judging a result. The technical scheme of combining negative pressure vacuum and helium mass spectrum leak detection is adopted, the characteristics that helium molecules are small in diameter, low in background content and high in response speed are utilized, the leak detection sensitivity is extremely high and is far superior to a traditional bubble method, a negative pressure maintaining method and an SFsniffing method, high-precision detection can be stably achieved, and the leak detection accuracy is greatly improved. The device can meet the requirements of extra-high-voltage GIL pipelines, chemical high-risk medium pipelines and other scenes with extremely high requirements for sealing performance, and the reliability and accuracy of detection results are greatly improved.

The application provides a structure feature driven multi-stage multi-class hierarchical screening bolt automatic sorting system and method, and belongs to the technical field of industrial standard part sorting. The system comprises five core modules, namely, a reciprocating bolt stepping transmission module, a reciprocating bolt stepping thread diameter sorting module, an infrared detection fluid driven bolt length sorting module, a bolt automatic sorting system shell and a bolt classification storage module. When batch bolts are sorted, the reciprocating stepping transmission can realize smooth conveying of bolt sequence, the mechanical structure design can realize primary screening of bolts according to thread diameters, the infrared detection and air knife driving can further realize secondary screening of bolts with the same diameter according to thread lengths, and finally, accurate and efficient sorting of batch bolts can be realized by cooperating with the classification storage device. The application adopts mechanical structure design and automatic control, has the advantages of high sorting precision, stable operation, strong anti-interference ability, low manufacturing cost and the like, and can adapt to the batch continuous sorting needs of small and medium-sized bolt classification plants.

This application discloses a modular seating backrest, including a back cushion unit and a lumbar cushion unit. The bottom of the back cushion unit has a stepped transition, and the back cushion unit includes a downwardly extending splicing portion, with a splicing groove formed at an inwardly recessed position relative to the splicing portion. The top of the lumbar cushion unit also has a stepped transition, and the lumbar cushion unit includes an upwardly extending mounting portion, with a mounting groove formed at an inwardly recessed position relative to the mounting portion. When the back cushion unit and the lumbar cushion unit are combined, the splicing portion fills the mounting groove, and the mounting portion fills the splicing groove. The splicing portion and the mounting portion are connected front to back, and are detachably connected by a quick-release structure. The modular seating backrest provided by this application, by setting the bottom of the back cushion unit and the top of the lumbar cushion unit as a stepped structure, not only makes the two fit more tightly and has higher connection strength, but also has a simple structure and low processing and manufacturing costs; furthermore, after packaging, the splicing portion and the mounting portion will not protrude outwards, ensuring packaging quality.

The utility model provides a kind of electric drive axle tube press fitting device, belong to the technical field of automobile parts processing and manufacturing, it includes upper pressing positioning device, lower positioning device and guiding reset device;The upper pressing positioning device includes upper connecting plate, and upper connecting plate top is provided with upper pressing plate, and upper connecting plate lower is provided with the upper positioning disc with upper positioning pin;Multiple magnets are provided on the upper positioning disc;The lower positioning device includes lower connecting plate, and lower positioning disc is provided on lower connecting plate;The guiding reset device includes guide column, and upper limit plate, guide sleeve, spring pressing block, reset spring, spring limit block, lower positioning seat are respectively provided on guide column;It further includes support seat, and support seat lower is matched with lower connecting plate, and upper is provided with limit block.This device is a kind of more flexible device, can realize the press fitting of different specifications left and right shaft tube assembly, satisfies sample piece submission cycle while ensuring product quality.

A robot joint relates to the technical field of robots and comprises a robot shell and a gear transmission mechanism. The robot shell is provided with a mounting cavity and a mounting hole which communicate with each other. The gear transmission mechanism is mounted in the mounting cavity, an input part of the gear transmission mechanism is used for being in transmission connection with a driver mounted in the robot shell, and an output part of the gear transmission mechanism is exposed to the mounting hole and is used for being in transmission connection with an execution piece rotationally mounted on the robot shell. The integration degree can be improved, the utilization rate of the internal space of the robot shell is increased, the large-speed-ratio transmission target in the limited space is achieved, consumables can be reduced, the cost can be reduced, and the risks of abnormal sounds, radiography and other problems caused by secondary installation of a traditional speed reducer are reduced.

The safety auxiliary tool for the aluminum electrolysis extinguishing effect comprises a fixing rod, the end portion of the fixed end is sleeved with a sleeve, and the section of the fixing rod is of a circular structure. And an effect rod is sleeved in the end part of the sleeve. The diameter of the effect rod is smaller than that of the fixing rod. The diameter of the effect rod is gradually reduced from bottom to top, and the end face of the bottom end of the effect rod is inserted into the sleeve. And the end part of the effect rod can extend into the aluminum electrolysis cell. The device has the beneficial effects of reasonable structural design, convenience in operation, easiness in processing and low processing and manufacturing cost, can be matched with the effect rod for use, assists the effect rod to be inserted into the electrolytic bath for operation, is safer and more reliable in operation, and can play a role in protecting the safety of operators.

This utility model discloses a combustion chamber shell and a combustion heat exchange device, relating to the field of combustion heat exchange technology. The combustion chamber shell includes an outer shell and heat insulation plates; the outer shell has four side walls, and four heat insulation plates are arranged correspondingly to the four side walls, with the thermal conductivity of the heat insulation plates being lower than that of the outer shell. A cooling channel is formed between each heat insulation plate and its corresponding side wall. An air inlet communicating with the cooling channel is provided at the lower part of the side wall, and an air outlet communicating with the cooling channel is provided at the upper part of the heat insulation plate. External cold air enters the cooling channel from the lower part of the side wall and flows upwards, allowing the external cold air to fully contact and exchange heat with the four side walls. The higher-temperature gas formed after the cold air absorbs heat enters the combustion chamber from the upper part of the heat insulation plate. The cooling channel formed by this combustion chamber shell has a simple structure, reduces manufacturing costs, and improves the heat dissipation and cooling effect of the combustion chamber shell.

The utility model discloses a head and tail seat type positioner relates to positioner technical field, and its technical scheme main points are: including underframe, headstock and tailstock, and tailstock and underframe slide fit, and be provided with two support mechanism for supporting rotary workpiece between headstock and tailstock, be provided with the first drive mechanism for driving rotary workpiece rotation in the headstock, and tailstock and support mechanism all are provided with the limiting device for limiting tailstock and support mechanism. The utility model discloses a support mechanism is arranged for, thereby making support mechanism can play the supporting effect to rotary workpiece, greatly reduce the weight load of main shaft to rotary workpiece, make the main shaft have longer service life, and the meshing of driving gear and driven gear can be more accurate through the adjustment of the adjusting plate of first drive mechanism, make the installation and structure of first drive mechanism more simple, thereby effectively reduce the processing manufacture and production cost of first drive mechanism.

The application discloses a fan foundation and a construction method. The fan foundation comprises a concrete foundation, a plurality of gravity cylinders, a tower cylinder and a mounting frame. At least part of the concrete foundation can be pre-buried in a foundation pit. The plurality of gravity cylinders are arranged at the outer circumferential side of the concrete foundation along the circumference of the concrete foundation. The tower cylinder is arranged on the concrete foundation. The tower cylinder is arranged on the mounting frame. The mounting frame has a plurality of mounting portions. The plurality of mounting portions are arranged at the outer circumferential side of the tower cylinder along the circumference of the concrete foundation. At least one mounting portion is arranged on each gravity cylinder. The mounting portion is connected with the gravity cylinder. The fan foundation has the advantages of simple structure, low cost and small size.

A gearbox output assembly, relating to the field of gearbox technology, includes a housing, an output shaft, a planetary carrier, a radial support bearing, and two axial support bearings. The planetary carrier is sleeved around the output shaft, and the planetary carrier and output shaft are fixedly connected. The planetary carrier and output shaft are rotatably fitted to the housing via the radial support bearing and the two axial support bearings. The two axial support bearings are spaced apart along the axial direction of the output shaft. The radial support bearings are supported between the housing and the planetary carrier or between the housing and the output shaft, and their rotation axes are parallel to the axis of the output shaft. The two axial support bearings are respectively supported between the housing and the planetary carrier and between the housing and the output shaft, with each axial support bearing having an angle with the axis of the output shaft. At least one bearing overlaps with the planetary carrier along the axial direction of the output shaft. This design reduces axial dimensions, overall size and weight, and manufacturing costs.

The application discloses a simulation fire extinguishing device and relates to the technical field of fire fighting training. The simulation fire extinguishing device is characterized in that when the screw rod rotates, the fixed cylinder can limit the synchronous rotation of the adjusting block with the screw rod, then the adjusting block is driven to stably move upwards along the axial direction through the screw thread on the outer side of the middle part of the screw rod, at this time, the upper end of the compression spring is limited from moving by the connecting plate, and is gradually compressed with the upward movement of the adjusting block, the elastic reaction force generated by the compression spring acts on the adjusting block, drives the screw rod to move downwards along the axial direction as a whole, pulls the first connecting rod to be close to the connecting plate, and increases the clamping force of the connecting plate and the first connecting rod on the damping ring.

The application discloses a three-stroke cylinder and a pneumatic system, and belongs to the technical field of pneumatic transmission. The three-stroke cylinder comprises an outer cylinder body, an intermediate cylinder body located in the outer cylinder body, and a piston and a piston rod located in the intermediate cylinder body. The outer cylinder body is sequentially provided with a first air port, a second air port, a third air port and a fourth air port. The intermediate cylinder body is provided with a first spacing portion on the side away from the piston rod, and the first spacing portion separates the outer cylinder body into a first cavity and a second cavity. The first spacing portion is provided with a fifth air port. When the intermediate cylinder body is located at a retracted position, the third air port on the outer cylinder body is in communication with the fifth air port of the intermediate cylinder. When the intermediate cylinder body is located at an extended position, the second air port on the outer cylinder body is in communication with the fifth air port of the intermediate cylinder. The application solves the problems of uncontrollable intermediate position and complex air path in the existing multi-stroke cylinder.

According to the embodiment of the utility model, the underground laser orientation instrument for the coal mine comprises a mounting plate, a plurality of connecting pieces and a laser orientation instrument, the mounting plate extends along the horizontal direction, and the upper ends of the plurality of connecting pieces are suitable for being connected with a steel mesh of a roadway, so that the connecting pieces can be mounted on the steel mesh conveniently; the mounting plate is arranged on the multiple connecting pieces in a penetrating mode, the mounting plate can move on the mounting plate in the vertical direction so that the position and angle of the mounting plate can be adjusted, the multiple connecting pieces are arranged in the circumferential direction of the mounting plate at intervals, and the laser orientation instrument is arranged below the mounting plate and connected with the mounting plate. The laser orientation instrument for the underground coal mine has the advantages of being convenient to disassemble and assemble, low in cost and the like.

This invention relates to the field of screw extruder technology, specifically to a modular, counter-rotating parallel twin-screw continuous compounding extrusion apparatus and extrusion method. The extrusion apparatus includes a frame base, with a first support platform and a second support platform sequentially formed along its length. A drive unit is located on the top of the first support platform, and an extrusion unit is located on the top of the second support platform. The extrusion unit includes an upper cylinder and a lower cylinder connected together. Screw mounting seats are located at both the upper and lower cylinders, and multiple liquid guide pipes are provided within the screw mounting seats. Two extrusion screws are arranged parallel to each other at the screw mounting seats. The drive unit drives the two extrusion screws to rotate. Each extrusion screw includes a mandrel with multiple threaded elements fitted onto it. The threaded elements are circumferentially fixed to the mandrel. The extrusion unit also includes a feeding mechanism located on the top of the upper cylinder near the drive unit. An outlet is formed at the end of the extrusion screw away from the drive unit. This invention achieves universality of the extrusion screw through replaceable threaded elements.

A mute floor based on EB curing relates to the technical field of house decoration and comprises an EB curing layer, a polypropylene decorative layer, a first polypropylene base material layer, a first polypropylene mute layer and a second polypropylene base material layer, the EB curing layer is arranged on the upper surface of the polypropylene decorative layer, the lower surface of the polypropylene decorative layer is attached to the upper surface of the first polypropylene base material layer, and the second polypropylene base material layer is arranged on the lower surface of the polypropylene decorative layer. The lower surface of the first polypropylene base material layer is attached to the upper surface of the first polypropylene mute layer, and the lower surface of the first polypropylene mute layer is attached to the second polypropylene base material layer. Through the EB curing technology and the multi-layer composite structure design, the comprehensive performance of shock absorption, noise reduction, wear resistance and durability is improved, and the machining and manufacturing cost is reduced.

This utility model discloses a joint module, a robotic arm, a robot, and a production system. The joint module includes a housing, a power component, and a reduction mechanism. The power component and the reduction mechanism are connected and housed within the housing. Both the power component and the reduction mechanism are connected to the housing via spline connections to fix them within the housing. The spline connection in this embodiment of the utility model enables circumferential positioning of the power component and the reduction mechanism within the housing, effectively preventing rotation of the power component and the reduction mechanism within the housing. This reduces the manufacturing cost of the joint module, simplifies the assembly process, improves the installation and disassembly efficiency of the power component and the reduction mechanism, and reduces maintenance time and costs for the joint module.

This application relates to the field of optical system design technology, and discloses a design method, device, and electronic device for an optical telescope based on a stitched primary mirror. The method includes: determining the current aspherical surface parameters of aspherical stitched sub-mirrors in different layers of the optical system according to the optical system constraints of the stitched primary mirror; iteratively optimizing the current aspherical surface parameters according to a pre-constructed comprehensive evaluation function; obtaining optimized aspherical surface parameters of the aspherical stitched sub-mirrors in different layers that satisfy the design requirements of the comprehensive evaluation function within the target field of view; and the best-fit sphere corresponding to the optimized aspherical surface parameters; and outputting the optimization results. This invention can reduce the manufacturing difficulty and cost of the stitched sub-mirrors, avoid the introduction of complex aberration correction optical elements, and ensure the versatility, multifunctionality, and scalability of the overall system.

The utility model relates to ice maker technical field especially ice making cylinder of ice maker, including outer cylinder and coaxial setting inside inner cylinder of outer cylinder, be provided with the front sealing ring and rear sealing ring of interval distribution along the axial between outer cylinder and inner cylinder, the outer edge of front sealing ring front end surface is welded fixed with the inner side wall of outer cylinder front end part, the inner edge of front sealing ring front end surface is welded fixed with the outer side wall of inner cylinder front end part, the outer edge of rear sealing ring rear end surface is welded fixed with the inner side wall of outer cylinder rear end part, the inner edge of rear sealing ring rear end surface is welded fixed with the outer side wall of inner cylinder rear end part. Through welding fixed to four positions, make the welding device can directly from the outside of this ice making cylinder laser welding, need not to reach into the inside of this ice making cylinder welding head, can weld and manufacture to this ice making cylinder, improved the efficiency of welding procedure.

The utility model provides a novel hinge structure which comprises a fixing part, a first connecting part and a second connecting part, the fixing part comprises an n-shaped first fixing frame, and the first fixing frame is composed of a first left side plate, a first top plate and a first right side plate; the movable part comprises a door-shaped second fixing frame and a front fixing plate, the second fixing frame is composed of a second left side plate, a second top plate and a second right side plate, and a fixing hole is formed in the front fixing plate; a first crankshaft; a second crankshaft; the second fixing frame is located in the first fixing frame, the second fixing frame is rotationally installed in the first fixing frame through the first crankshaft and the second crankshaft, the first crankshaft is located on the front side of the second crankshaft, and the first fixing frame is provided with a notch allowing the second fixing frame to be overturned and clamped. The fixed part and the movable part are connected through the first crankshaft and the second crankshaft which are arranged front and back, the function of a damping hinge is achieved, and meanwhile the damping hinge is simple in structure, low in machining and manufacturing cost, not prone to damage, long in service life and good in economic benefit.

The utility model discloses a scale inhibitor structure which comprises a cylinder body, the cylinder body is provided with a water inlet and a water outlet, an inner cavity of the cylinder body is used for placing a filter material or a scale inhibitor, a first filter screen structure is arranged at the water inlet, and a second filter screen structure is arranged at the water outlet. The first filter screen structure and / or the second filter screen structure are / is a cylindrical filter screen structure, one end of the cylindrical filter screen structure is open, a plurality of elastic through grooves are formed in the open end of the cylindrical filter screen structure at intervals in the circumferential direction, and the open end of the cylindrical filter screen structure is divided into a plurality of elastic petals in the circumferential direction through the elastic through grooves; according to the cylindrical filter screen structure, the whole cylindrical filter screen structure can be installed at the water inlet or the water outlet through the elastic effect of the elastic petals, the cylindrical filter screen structure arranged in this way does not need complex positioning and limiting structures, a user can easily install the cylindrical filter screen structure at the correct position, and the user experience feeling is good.

The invention provides an adjusting method for improving the measurement performance of an autocollimator, is suitable for the field of precision manufacturing and machine tool calibration, and solves the problem of measurement errors of the autocollimator caused by various error sources. The method is based on two core characteristics: 1, the measurement error of the autocollimator has the characteristic of continuous change; and secondly, the positions, horizontally deviating from the optimal focal plane along the optical axis, of the CCD in the autocollimator are different, and the angle error variation trends of the CCD in the autocollimator are different when the CCD measures the same angle and different working distances. And in the full-scale working distance range of the autocollimator, the angle error difference between the nearest working distance and the farthest working distance during maximum angle measurement is enabled to be lower than a preset threshold value by searching a proper defocusing amount. And then fixing the CCD at a position corresponding to the defocusing amount, and recalibrating the autocollimator. According to the method, the overall measurement error of the autocollimator under the working conditions can be reduced, and the measurement performance is improved. The method has good universality and can be applied to all autocollimators.

The application provides a lithium iron phosphate positive electrode material and a preparation method thereof. The preparation method of the lithium iron phosphate positive electrode material comprises the following steps: S1, mixing, grinding and treating an active material composition, a basic carbon source and a composite synergist in a solvent to obtain a slurry; S2, performing spray drying treatment on the slurry to obtain dry materials; S3, performing primary sintering treatment on the dry materials in a protective atmosphere to obtain lithium iron phosphate sintered materials; and S4, performing crushing treatment on the lithium iron phosphate sintered materials to obtain the lithium iron phosphate positive electrode material. The composite synergist is prepared from the following raw materials in mass percentage: 15-50% of an organic dispersant, 20-60% of a titanium compound and 10-50% of a compound of M. The application can reduce the energy requirement for synthesizing the lithium iron phosphate material and reduce the sintering temperature. The application adopts one-time addition and one-time sintering, has low energy consumption and cost, is simple to operate, simple to produce and controllable, and is easy to industrialize. The lithium iron phosphate material has high compaction density.

The application discloses a kind of production high-end noodle equipment of toughness, it is related to noodle processing production technical field, it solves the noodle production equipment of prior art, to improve the taste of noodle, generally increase curing time and the number of calender roll, above-mentioned mode tends to increase very high cost, it is easy to lead to the effect of noodle internal quality is not good, reduces noodle production efficiency technical problem;Including several racks, cutting knife assembly and be set on rack conveyor one, conveyor two, conveyor three, conveyor four, electric slide rail and PLC control system and inductor group;Wherein, electric slide rail and PLC control system are connected;The application adopts the method of analog composite skin calendering, increases dough thickness, reaches to improve dough internal toughness, to improve the taste of noodle, not only can reach to improve the effect of noodle internal quality, while reducing processing and manufacturing cost, simple structure is convenient for installation, simplifies maintenance in later use process.

The utility model relates to a waste heat boiler header turnover frame, and belongs to the technical field of boiler equipment. The container storage rack is used for storing and transferring containers and comprises a single-layer support with an open upper portion, the single-layer support comprises a rectangular bottom frame capable of containing the containers and four stand columns fixed to the four corners of the rectangular bottom frame respectively, lifting lugs are arranged on the upper end face of the rectangular bottom frame, and inserting grooves are formed in the lower end face of the rectangular bottom frame. And the upper-layer single-layer bracket can be spliced with the upright posts of the lower-layer single-layer bracket through the slots. According to the utility model, the space utilization rate of a storage site is obviously improved, the transfer efficiency of the container is improved, and the container has the advantages of lower raw material and processing and manufacturing cost, safety and reliability.

The invention relates to a titanium-containing hot-dip aluminum-zinc alloy coating, a steel plate and a preparation method of the titanium-containing hot-dip aluminum-zinc alloy coating, and the alloy coating comprises the following chemical components in percentage by weight: 55.0% of Al, 1.6% of Si, 0.010%-0.050% of Ti and the balance of Zn. The alloy coating steel plate comprises a steel substrate and a titanium-containing hot-dip alloy coating attached to the surface of the steel substrate. The preparation method comprises the following steps: S1, preparing a plating solution; s2, pretreatment of the steel matrix; s3, carrying out a hot dipping process; s4, carrying out post-treatment; the method has the beneficial effects that the content of Ti in the plating solution is accurately regulated and controlled, hot dipping technological parameter optimization is combined, uniform refining of a plating layer structure is achieved, heterogeneous nucleation of Al-rich phase dendritic crystals can be efficiently promoted, the spangle size is reduced to be within 200 micrometers from 800 micrometers, meanwhile, the side effect that zinc slag is increased due to excessive Ti is avoided, the hardness of the refined plating layer is improved by 30%-50%, grain boundary distribution is uniform, and the plating layer has the good corrosion resistance. The performance is obviously improved.

The application discloses a single-rotor turbofan engine, which comprises a rotating shaft, a fan, a centrifugal compressor, a turbine and a combustion chamber, all of which are located in an engine outer casing shell; the fan rotor, the centrifugal compressor rotor and the turbine rotor are fixedly assembled on the rotating shaft in sequence; a fan airflow channel is formed between the inner wall of the engine outer casing shell and the fan rotor, an inner bypass channel leads to the centrifugal compressor, and an outer bypass channel leads to the exhaust port of the engine; after the inner bypass airflow is discharged from the centrifugal compressor, the inner bypass airflow enters the combustion chamber to be mixed with fuel and combusted to generate high-temperature and high-pressure gas, which drives the turbine rotor to rotate and drives the fan rotor and the centrifugal compressor rotor coaxially arranged with the turbine rotor to rotate to perform work on airflow pressurization; and the high-temperature and high-pressure gas drives the turbine rotor to rotate and is discharged from the exhaust port. The single-rotor turbofan engine has the advantages of less pressurization stages, high pressure ratio, small engine size, simple structure, good reliability and reduced manufacturing cost.

The utility model relates to a multifunctional track sand cleaning vehicle, which comprises a vehicle body, wheels fixedly installed on the bottom surface of the vehicle body, a control chamber arranged at the front end of the vehicle body, control components arranged in the control chamber, a sand discharging auger mechanism fixedly installed on the bottom surface of the vehicle body, a pneumatic sand suction mechanism fixedly installed on the surface of the vehicle body, a hydraulic pump station fixedly installed on one side of the pneumatic sand suction mechanism, the hydraulic pump station being fixedly installed on the surface of the vehicle body, a sand storage tank fixedly installed on the surface of the vehicle body, a generator set fixedly connected to the sidewall of the sand storage tank, and a conveying mechanism fixedly arranged on the sand storage tank. The utility model has the advantages of reasonable structure design, novel conception, convenient operation, easy processing, low processing and manufacturing cost, saving of manpower, saving of sand cleaning time, improvement of sand cleaning efficiency, complete sand cleaning, special use for sand cleaning of railway tracks under harsh environmental conditions, and integration of sand collecting, sand collecting, sand suction and sand discharging.