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361 results about "Mechanical field" patented technology
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Mechanical engineering is a broad field that involves the design and creation of a vast array of products, from regular household items such as kitchen appliances to airplanes or artificial organs.
Pass-type drawing device for multiple large iron molds with different cavities
The utility model relates to a through-type drawing device for a plurality of large iron molds with different cavities, and belongs to the field of machinery. The device comprises movable trolley tracks, a lifting travelling crane, a plurality of movable trolleys, a fixed iron mold and a model drawing separation mechanism, the movable trolleys are all arranged on the movable trolley tracks, the movable trolley tracks are arranged on the two sides of the fixed iron mold and the model drawing separation mechanism, the lifting travelling crane is arranged above the fixed iron mold and the model drawing separation mechanism, and the lifting travelling crane is arranged above the fixed iron mold and the model drawing separation mechanism. Two rails are installed on a base in the fixed iron mold and model drawing separation mechanism, drawing supports are fixed to the two sides of the rails, two lifting drawing hydraulic cylinders are installed in the upper plane of each drawing support, a plurality of clamping mechanisms are fixed to each drawing support, and two drawing beams are fixedly connected through two drawing supporting beams. The device is reasonable in structural design, convenient to install, reliable in operation, low in labor intensity, high in mechanization degree, good in drawing quality of an iron mold casting mold, smooth in technological process and capable of meeting use requirements.
Owner:浙江省机电设计研究院有限公司
Hydraulic hayrake with adjustable amplitude and width
A hydraulic hay rake with an adjustable width belongs to the field of agricultural machinery, and comprises a middle hay raking mechanism and side hay raking mechanisms positioned on two sides of the middle hay raking mechanism, the middle hay raking mechanism is fixed on a rack and is provided with a first cross beam, and the side hay raking mechanisms are provided with second cross beams; second beams of the two side hay raking mechanisms are sleeved with the two ends of a first beam of the middle hay raking mechanism in a penetrating mode, telescopic oil cylinders are arranged between the first beam of the middle hay raking mechanism and the second beams of the two side hay raking mechanisms, and oil inlet pipes of the telescopic oil cylinders are communicated with a hydraulic synchronous flow dividing motor. The hydraulic synchronous shunting motor is communicated with a hydraulic system of the walking machine; and an oil outlet pipe of the telescopic oil cylinder is communicated with the hydraulic system of the walking machine. The hydraulic synchronous shunting motor can enable the two side raking mechanisms to stretch out and draw back synchronously, the adjusting amplitude is unified, and the adjusting precision is high. The two side raking mechanisms can contract inwards through the telescopic oil cylinders, so that the overall width is reduced, and movement and transportation are facilitated.
Owner:JILIN JIALONG AGRI EQUIP TECH CO LTD
Load and environmental corrosion coupled reinforced concrete structure analysis method
ActiveCN121118546ADesign optimisation/simulationComputational materials scienceTime domainStructure analysis
The invention relates to the technical field of civil engineering and computational mechanics, in particular to a load and environmental corrosion coupled reinforced concrete structure analysis method. The method comprises the following steps: carrying out structural finite element modeling; carrying out mechanical field solving; the diffusion characteristics of the crack-driven corrosive medium are updated; solving a corrosive medium diffusion field; the material performance is corrected; carrying out double-time-domain self-adaptive solution; by means of the mode, the coupling effect of complex loads and multiple environmental factors in the reinforced concrete structure can be comprehensively and accurately simulated within the engineering acceptable calculation cost, and reliable prediction of the full life cycle performance is achieved.
Owner:BEIJING JIAOTONG UNIV +1
Pallet fork hydraulic system and forklift loader
The invention belongs to the field of engineering machinery, and discloses a forklift loader and a fork hydraulic system.The fork hydraulic system comprises a first oil cylinder and a second oil cylinder, rod cavities between the first oil cylinder and the second oil cylinder are communicated with each other, a rodless cavity of the first oil cylinder is connected with a first sidesway working oil way, and a rodless cavity of the second oil cylinder is connected with a second sidesway working oil way. A rodless cavity of the second oil cylinder is connected with a second lateral displacement working oil way; and a multi-way valve to which the first side shift working oil path and the second side shift working oil path are hydraulically connected. The two oil cylinders can be driven to generate synchronous transverse movement on the opposite sides, and therefore synchronous lateral movement hydraulic driving is achieved. The distance between the fork knives of the pallet fork is adjusted in a non-manual mode, goods can be conveniently taken by the pallet fork, the left-right position adjustment of heavy goods loaded by the pallet fork on the pallet fork portal frame can be achieved, and the heavy goods can be conveniently and accurately stacked.
Owner:ZOOMLION INTELLIGENT ACCESS MASCH CO LTD
Truss manipulator
The utility model relates to the field of industrial machinery, and particularly discloses a truss manipulator which comprises a truss, an X-axis moving frame and a Y-axis moving frame, the Y-axis moving frame is arranged on the truss, the X-axis moving frame is arranged on the Y-axis moving frame, a lifting arm and a first driving motor for lifting the lifting arm are arranged on the X-axis moving frame, and the first driving motor is arranged on the Y-axis moving frame. A clamping mechanism is arranged at the end, away from the X-axis moving frame, of the lifting arm. The X-axis moving frame and the Y-axis moving frame move the clamping mechanism to the position above a carried workpiece, the first driving motor is started to drive the lifting arm to descend, the clamping mechanism clamps the workpiece, and then the first driving motor is started to drive the lifting arm to ascend; and after ascending is stopped, the workpiece is moved to a designated position through the X-axis moving frame and the Y-axis moving frame, after moving is completed, the first driving motor drives the lifting arm to descend, the workpiece is placed at a proper position, and therefore full-automatic carrying of the workpiece is achieved.
Owner:HUBEI HENGLIDA WELDING EQUIP
Electric vehicle disc brake pump turnover device
The utility model relates to the field of machinery, and discloses an electric vehicle disc brake pump turnover device which comprises a walking machine frame, a support is arranged on the machine frame, and a plurality of disc brake fixing pieces are arranged on the support. The disc brake fixing piece is used for being inserted into a handle connecting ring of the disc brake upper pump, or sleeved on the outer wall of a pump body of the disc brake upper pump, or sleeved on the outer wall of an oil pipe connector pipe of the pump body of the disc brake upper pump; when the disc brake fixing piece is connected with the handle connecting ring, the support provides a supporting face for the pump body. When the disc brake fixing piece is connected with the outer wall of the pump body or the outer wall of the oil pipe connector pipe, the support provides a supporting face for the handle connecting ring. According to the circulating device, workers can count the number conveniently, and scratches caused by collision between the electric vehicle disc brake pumps are avoided.
Owner:GUANGZHOU YADEA LOCOMOTIVE CO LTD
Pumping unit and fluid balancing method
PendingCN121916148ADouble adjustment effectlow operating costConstructionsFlexible member pumpsReduction driveCrank
The invention provides a pumping unit and a fluid balancing method, and belongs to the field of petroleum extraction machinery. The pumping unit comprises a base, a supporting seat is fixedly installed on the base, and a motor, a speed reducer and a support are installed on the supporting seat. The walking beam is connected with the bracket through a bearing seat; an output shaft of the speed reducer is connected with the walking beam through a crank and a connecting rod of the four-rod mechanism; the two ends of the walking beam are connected with a first horse head and a second horse head respectively, the first horse head and the second horse head are communicated through a connecting pipe arranged between the first horse head and the second horse head, an electric valve is arranged on the connecting pipe, and an electric cabinet is further arranged on the supporting seat and electrically connected with the electric valve. The oil pumping unit is used for two oil wells close to each other, the function that one oil pumping unit pumps two oil wells is achieved, the equipment investment of one oil pumping unit can be saved, the running loss of one oil pumping unit is reduced, and fluid balance is used for balancing the load difference of the two oil wells; after the balance box is arranged on the second horse head, the second horse head can be only used for pumping oil of one oil well, and fluid balance is used for weight difference between the oil well and the balance box.
Owner:XINJIANG PETROLEUM ADMINISTRATION BUREAU +1
Garden equipment
The utility model provides garden equipment, and relates to the technical field of garden machinery. The garden equipment comprises a first cavity, a second cavity, a conveying channel, a cutting device and an airflow generating device, and the first cavity, the second cavity and the conveying channel all communicate with a mixing area; the material cutting device is used for cutting or smashing an object to be cleaned, so that material scraps are generated in the first cavity; the airflow generating device is used for generating accelerated airflow in the second cavity, and the airflow flows to the conveying channel through the mixing area; the mixing area is used for mixing the material scraps and the air flow discharged from the second chamber to form a mixture; the conveying channel is used for conveying the mixture. According to the garden equipment, the material scraps can be quickly discharged, so that the condition of material scrap blockage is avoided.
Owner:CHANGZHOU LYMOW TECHNOLOGY CO LTD
Method for discriminating action boundary of hole-shaft part
The invention relates to the technical field of geometric error evaluation of hole and shaft parts in the field of machinery, and discloses a hole and shaft part action boundary discrimination method, which comprises the following steps of: deriving a motion coefficient vector for describing radius change of each measuring point based on a tiny rigid body motion model of a surface measuring point set of a measured part; and the motion coefficients are combined into a motion coefficient matrix. Furthermore, the method establishes a discriminant inequality group based on a mutual exclusion proposition. The judgment process is realized by analyzing the rank of the motion coefficient matrix and iteratively solving an equation set formed by the maximum linear independent matrix of the motion coefficient matrix, and finally, whether the fitting cylinder is the action boundary or not is determined by judging whether the inequality set has a feasible solution or not. According to the method, the problems of complicated geometric discrimination conditions, lack of universality and the like in the existing evaluation method can be solved, and a reliable basis which is easy to realize in a stylization manner is provided for determining the action boundary of the hole-shaft part.
Owner:南宁桂电电子科技研究院有限公司 +1
Graded vibration-limiting ridge pressing device
The utility model belongs to the field of agricultural machinery, and particularly relates to a grading vibration limiting ridge pressing device which comprises a rack, a ridging assembly, a vibration ridge pressing assembly and a vibration limiting assembly, the rack is provided with a first driving part and a mounting frame, the ridging assembly is arranged on the rack and is in transmission with the first driving part, and the vibration ridge pressing assembly is arranged on the mounting frame; the vibration limiting assembly comprises a positioning rod, a cushioning spring and a limiting pin, the lower end of the positioning rod is hinged to the vibration ridge pressing assembly, the mounting frame is hinged to a limiting table, a sliding hole is formed in the limiting table, and the positioning rod is slidably inserted into the sliding hole. The cushioning spring is compressed to generate elastic force for pressing the vibration ridge pressing assembly, the upward vibration amplitude of the vibration ridge pressing assembly is reduced, the loosening degree of the ridge surface of the ridge is reduced along with the reduction of the upward vibration amplitude, the ridge surface becomes more compact, and finally the more compact ridge surface can be pressed out.
Owner:QINGDAO UNIV OF TECH +1
Multifunctional engineering vehicle
The utility model belongs to the field of engineering machinery, and relates to a multifunctional engineering vehicle which comprises a walking mechanism, a hopper, a bucket, two large arms, a large arm pitching mechanism and a large arm telescoping mechanism, the hopper is detachably placed on the walking mechanism, the two large arms are symmetrically arranged on the two sides of the hopper, one end of each large arm is hinged to the walking mechanism, and the other end of each large arm is hinged to the bucket. The other end of the bucket is hinged to the bucket, and the bucket is arranged in front of the hopper; one end of the big arm pitching mechanism is hinged to the walking mechanism, and the other end of the big arm pitching mechanism is hinged to the big arm so as to control the pitching angle of the big arm. The large arm comprises a large arm inner sleeve and a large arm outer sleeve arranged on the large arm inner sleeve in a sliding and sleeving mode, the end, away from the large arm inner sleeve, of the large arm outer sleeve is hinged to the walking mechanism, the end, away from the large arm outer sleeve, of the large arm inner sleeve is hinged to the bucket, a large arm telescopic mechanism is arranged on the large arm outer sleeve, and the output end of the large arm telescopic mechanism is connected to the large arm inner sleeve. And the large arm inner sleeve is driven to axially move in the large arm outer sleeve, so that the length of the large arm is controlled.
Owner:CHONGQING HUASUI INTELLIGENT EQUIPMENT CO LTD
Accessory sales prediction method and system, electronic equipment and storage medium
The invention relates to the field of engineering machinery, in particular to an accessory sales prediction method and system, electronic equipment and a storage medium. The accessory sales volume prediction method comprises the following steps: acquiring a first classification label of a to-be-predicted first accessory and first sales volume related information of the first accessory; the first sales volume related information is input into a target prediction model associated with the first classification label, a prediction result output by the target prediction model is obtained, and the target prediction model is obtained through training of training samples corresponding to accessories belonging to the first classification label; and according to the prediction result, determining a target sales volume parameter of the first accessory in the future time period. According to the accessory sales volume prediction method provided by the invention, the accuracy of accessory sales volume prediction is improved.
Owner:SANY GROUP CO LTD
Boom of concrete pump truck and concrete pump truck
The present invention discloses a pump truck boom and a pump truck, which relate to the field of engineering machinery and are used to make the structure of the pump truck boom more compact and reasonable. The pump truck boom includes a first boom, a second boom and a worm gear drive mechanism. The second boom is rotatably connected to the first boom. The worm gear drive mechanism includes a worm wheel and a worm that mesh with each other, and the worm wheel includes an inner ring and an outer ring that are rotatably connected; the inner ring is fixedly connected to the first boom, and the outer ring is fixedly connected to the second boom. The pump truck boom provided by the above technical solution adopts a worm gear drive mechanism to drive the first boom and the second boom to rotate relative to each other. The worm gear drive mechanism has a reverse self-locking characteristic and can achieve mechanical self-locking, so that the first boom can be safely and reliably stopped at any position relative to the second boom. In addition, the worm gear drive mechanism has a large transmission ratio, a compact structure, and low weight; the meshing tooth surfaces of the two wheels are in line contact, and the load-bearing capacity is large.
Owner:XUZHOU XCMG CONSTR MACHINERY CO LTD BUILDING MACHINERY
Crushing, vibrating and screening device
The utility model relates to the field of engineering machinery, and discloses a crushing and vibrating screening device which comprises a shell, two first rotating shafts are rotationally arranged on the front side of the upper end of the shell, first crushing wheels are fixedly arranged at the ends, away from first gears, of the two first rotating shafts in a sleeved mode, and a mounting groove is formed in the lower end, away from the first crushing wheels, of the shell. First springs are arranged at the four corners of the upper end of the mounting groove, a first vibration plate is fixedly arranged at the lower ends of the four first springs, a vibration motor is fixedly arranged at the end, away from the first springs, of the first vibration plate, second springs are arranged at the four corners of the lower end of the first vibration plate, and a second vibration plate is fixedly arranged at the lower ends of the four second springs. A crushing box is fixedly arranged at the lower end of one side of the shell. According to the utility model, raw materials can be crushed and screened for multiple times, so that the crushing efficiency is improved, the raw materials are ensured to be fully crushed, and the waste of energy and cost is reduced.
Owner:ZHANGYE NEW GREAT BOW AGROCHEM
Space end effector adaptive manipulator and its transmission and control method
The application discloses a kind of space end effector adaptive fingers and its transmission and control method, belong to spaceflight control machinery field, the manipulator tool is sequentially included from top to bottom: finger part, motor layer, drive layer, flange layer;The finger part includes: first mobile finger, second mobile finger, fixed finger;The first mobile finger, second mobile finger, fixed finger all have three knuckles, from top to bottom are far knuckle, middle knuckle and near knuckle, there is a recess on each knuckle for embedding sensor;The structure of first mobile finger, second mobile finger, fixed finger is same;The application realizes multiple finger actions by different contact and cooperation between multiple motor systems, can control a small amount of motor system and drive device to carry out rotating drive two fingers to carry out fixed shaft relative rotation, and single finger alone carries out gripping action and restores multiple actions such as etc.;And the application guarantees efficiency while making space utilization reach maximum.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
External angular displacement synchronizing device and tractor
The utility model relates to an external angular displacement synchronizing device and a tractor, and relates to the field of agricultural machinery, a rack of the external angular displacement synchronizing device is fixedly provided with a measured rod rotating shaft, a measured rod is rotatably connected with the measured rod rotating shaft, the measured rod is in transmission connection with a synchronizing shaft through a transmission mechanism, and an angular displacement sensor is fixedly connected with the rack. And the angular displacement of the synchronizing shaft is detected. The tractor comprises the external angular displacement synchronizing device. The beneficial effects of the utility model are that when the rod to be detected rotates, the transmission mechanism synchronously drives the synchronizing shaft to rotate, and the angular displacement sensor detects the angular displacement of the synchronizing shaft so as to obtain the angular displacement of the rod to be detected. In other words, when the rotating shaft of the rod to be measured does not rotate or the angular displacement sensor cannot be installed, the motion angular displacement of the rod to be measured can be reflected to the synchronizing shaft through the transmission mechanism, so that the angular displacement of the rod to be measured is measured.
Owner:LOVOL HEAVY IND CO LTD
Control system, method, processor, and storage medium for a leg
ActiveCN115788989BFluid-pressure actuator safetyFluid-pressure actuator testingControl systemClassical mechanics
The application relates to the field of engineering machinery, in particular to a control system and method for a support leg, a processor and a storage medium. The method comprises the following steps: acquiring a side load pressure of a vertical support leg through a side load sensor; determining an initial angle between a current luffing oil cylinder and a horizontal direction; determining an execution length of the luffing oil cylinder according to the initial angle and a target angle, wherein the target angle is an angle between the luffing oil cylinder and the horizontal direction when the side load pressure is zero; comparing the side load pressure with a preset threshold value; and controlling the luffing oil cylinder to contract or extend the execution length according to the size between the side load pressure and the preset threshold value, so as to control the vertical support leg to rotate and adjust the side load pressure to zero. According to the side load pressure of the vertical support leg, the luffing oil cylinder is controlled to contract and extend, so that the vertical support leg can rotate relative to the horizontal support leg, thereby offsetting the side load pressure borne by the vertical support leg, effectively reducing the failure risk of the oil cylinder and greatly prolonging the service life of the oil cylinder.
Owner:ZOOMLION INTELLIGENT ACCESS MASCH CO LTD
Batching and feeding mechanism of mixing mill
The utility model relates to the field of material processing machinery, and discloses a batching and feeding mechanism of a mixing mill, which comprises a base, a plurality of baffles are fixedly connected to the top of the base, an anti-blocking mechanism is arranged among the baffles, a feeding tank is fixedly connected to the tops of the baffles, a grinding and mixing mechanism is arranged in the feeding tank, and the grinding and mixing mechanism is arranged in the feeding tank. A hollow box is fixedly connected to the outer side of the feeding tank, a lubricating mechanism is arranged in the hollow box, the grinding and mixing mechanism comprises a main grinding roller and a plurality of auxiliary grinding rollers, and the main grinding roller is arranged among the auxiliary grinding rollers. According to the utility model, after being fed into the feeding tank, ingredients are ground and sheared by the plurality of grinding rollers inside the feeding tank, and are uniformly mixed at the same time. And the treated materials finally fall on the discharging plate, and the whole process is efficient and rapid. According to the design, the tedious steps of respectively mixing and cutting ingredients in the traditional process are effectively simplified, and the working efficiency is greatly improved.
Owner:DALIAN TYRE FACTORY CO LTD
Highway subgrade crushing and leveling all-in-one machine and method based on energy-saving motor
The invention relates to the field of engineering construction machinery, in particular to a highway subgrade crushing and leveling all-in-one machine and method based on an energy-saving motor. The device comprises a mounting frame, an adjusting mechanism, a cutting mechanism and a crushing mechanism. The adjusting mechanism controls the moving frame to move longitudinally through an electric push rod to adjust the cutting height; the cutting mechanism adopts an annular cutter with a notch in the circumferential direction to pre-cut the raised roadbed; the crushing mechanism converts cutting power into rotating motion of a reciprocating lead screw through gear transmission, and the crushing assembly is driven to conduct buffering type impact crushing on a cutting area. The crushing assembly comprises a crushing disc with a buffer groove and sliding crushing teeth and is combined with a variable frequency motor to achieve multi-stage crushing. According to the scheme, a vibration transmission area is isolated through pre-cutting, the problems that traditional equipment is insufficient in crushing precision and a roadbed is loosened are solved, and crushed materials are centrifugally thrown through the annular cutter to achieve roadbed leveling.
Owner:ZHEJIANG HAOYUAN CONSTR CO LTD
Mining trolley
The utility model discloses a mining trolley, and relates to the field of engineering machinery, the mining trolley comprises a frame, a pitching platform, a pitching oil cylinder, a translation platform, an execution mechanism, a four-bar mechanism and a telescopic piece; the four-connecting-rod mechanism is driven to move through pitching of the pitching platform and the telescopic piece, the four-connecting-rod mechanism drives the translation platform to transversely move in the roadway, and then all shot hole work in a fan-shaped range can be smoothly completed on the premise that the mining trolley is not moved in the narrow roadway; the reciprocating motion of the translation platform from the leftmost end to the rightmost end can be realized, so that the structure of the whole vehicle is compact, and the transverse operation range is large.
Owner:HUNAN SIFUMAI INTELLIGENT TECH CO LTD +2
A road pit rapid repair paver
The utility model relates to the field of engineering machinery, concretely is a kind of road pit rapid repair paver, including vehicle body, handrail, mounting seat and adjusting assembly, the upper surface of vehicle body is fixedly connected with handrail, the surface of vehicle body is fixedly connected with mounting seat, adjusting assembly includes scraper one and positive and negative screw rod, the surface of scraper one is slidably connected with mounting seat, the surface of scraper one is fixedly connected with connecting block one, the lower portion of mounting seat is equipped with positive and negative screw rod, the surface of connecting block one is screw-connected with positive and negative screw rod, the side of positive and negative screw rod is rotatably connected with carousel, the surface of mounting seat is slidably connected with scraper two, scraper two and scraper one are symmetrically arranged.The utility model, by setting adjusting assembly, quickly change scraper width, reduce the number of round trips operation, especially in large-area road pit repair significantly improve efficiency, improve overall operation efficiency.
Owner:CHINA CONSTR SECOND ENG BUREAU LTD +1
Cab mounting frame and engineering machinery thereof
ActiveCN222946875ULoading-carrying vehicle superstructuresFrictional coefficientStructural engineering
The utility model belongs to the field of engineering machinery, and discloses a cab mounting frame and engineering machinery thereof. The cab mounting frame comprises a driving bracket, a bearing bracket and a rolling bearing structure; the driving support extends in the first direction and is used for being installed on an engineering machinery platform. The bearing bracket is movably mounted on the driving bracket in the first direction, and the bearing bracket is used for bearing a cab; the rolling bearing structure comprises a rolling wheel, and the rolling wheel is fixedly installed on one of the driving support and the bearing bracket and abuts against the other one of the driving support and the bearing bracket in a rolling mode. According to the cab installation frame, rolling friction is generated between the driving support and the bearing bracket through the idler wheels, the friction coefficient is reduced, and therefore stable movement of the whole cab can be achieved.
Owner:ZHEJIANG SANY EQUIPMENT CO LTD
Mechanical device for automatically taking seedlings
The utility model relates to the field of agricultural machinery, in particular to a mechanical device for automatically taking seedlings. Comprising four supporting feet, each supporting foot is provided with a driving part, the driving parts drive sliding parts to slide up and down through rubber parts so as to drive the seedling taking system to move up and down, and after the sliding parts abut against stop blocks, the driving parts can continue to slide relative to the sliding parts and push horizontal rods to move horizontally through steering devices; the horizontal rod is connected with a plurality of inclined plates, the inclined plates are matched with one another to form a seedling taking groove, and the driving link pushes the horizontal rod to move, so that the seedling taking groove can be opened and closed. By arranging the steering device, the driving link not only can drive the seedling taking system to move up and down, but also can control the opening and closing of the seedling taking groove, so that automatic seedling taking and placing are realized, and the structure is effectively simplified; by arranging a rubber part and a stop block, the seedling taking system can move up and down and the seedling taking groove can be opened and closed in sequence, so that the seedling taking and placing accuracy is improved; a plurality of seedling taking grooves can work at the same time, and the seedling taking and placing efficiency is high.
Owner:CHENGDU TECH UNIV
Control method, processor, working machine and storage medium for a working machine
The application relates to the field of engineering machinery, in particular to a control method for engineering machinery, a processor, engineering machinery and a storage medium. The engineering machinery comprises an operating device, an input piston, a pressure piston, a pressure oil source, an electromagnetic reversing valve, a variable pressure reducing valve and a hydraulic oil source, a pressure cavity is formed between the input piston and the pressure piston, an oil inlet of the electromagnetic reversing valve is connected with the pressure oil source, and the first end and the second end of the variable pressure reducing valve are respectively connected with the electromagnetic reversing valve and the pressure cavity. The method comprises the following steps: in the case that the operating mode of the engineering machinery is a first mode, the electromagnetic reversing valve is controlled to be opened, so that the hydraulic oil of the pressure oil source flows through the variable pressure reducing valve and is introduced into the pressure cavity; the target operating force of the operating device is acquired; the valve opening degree of the variable pressure reducing valve is adjusted, so that the oil pressure of the hydraulic oil flowing through the variable pressure reducing valve and being introduced into the pressure cavity is adjusted, and the operating force of the operating device is the target operating force. The operating force of the operating device is adjusted, so that the operating device meets different operating conditions.
Owner:ZOOMLION EARTHMOVING MASCH CO LTD +1
Combined orchard branch crusher
The utility model relates to the field of agricultural machinery, in particular to a combined orchard branch pulverizer which comprises a walking frame, a pulverizing bin installed above the front portion of the walking frame, a power device installed above the rear portion of the walking frame and connected with a transmission device, a feeding port formed in the upper middle portion of the rear portion of the pulverizing bin, and a discharging port formed in the lower middle portion of the front portion of the pulverizing bin. And the discharge guide plate is arranged at the discharge hole. Fine crushing of branches is achieved through a crushing mode of combining first-stage chopping and second-stage crushing, the crushing granularity of the branches can be controlled, and the crushing efficiency is improved.
Owner:ZIBO AGRI MASCH RES INST
Drilling well wall stability prediction method considering hydrate reservoir creep effect
The invention relates to the technical field of petroleum engineering drilling safety, and discloses a drilling well wall stability prediction method considering a hydrate reservoir creep effect, and the method comprises the following steps: S1, building hydrate reservoir initial heat flow field distribution based on TOUGH + HYDRATE software; s2, establishing an initial mechanical field of the hydrate reservoir by adopting FLAC3D software; s3, the TOUGH + HYDRATE software and the FLAC3D software are subjected to data interface coupling, and a multi-field coupling model is constructed; s4, carrying out a triaxial creep test, obtaining a strain-time curve, carrying out fitting analysis, preferably selecting a creep constitutive model, and carrying out parameter calibration; s5, fitting by utilizing origin software to obtain a function model of the creep parameters changing along with the saturation degree of the hydrate; and S6, well periphery parameter monitoring is conducted in the drilling simulation process. The method is suitable for borehole wall instability risk analysis under the synergistic effect of hydrate decomposition and reservoir creep.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Split mounting type high-temperature-resistant graphite tray capable of preventing metal piece from being fixed
The utility model relates to the field of machinery, in particular to a graphite tray technology. The assembled high-temperature-resistant graphite tray comprises a graphite tray body, a groove is formed in the upper end face of the graphite tray body, and an inner threaded hole is formed in the middle of the groove. An arc-shaped groove with the arc-shaped angle ranging from 120 degrees to 240 degrees is vertically formed in the inner side of the inner threaded hole. A thread is arranged in the arc-shaped groove to form a half screw hole; and the depth of the half screw hole is 1 / 2-3 / 4 of the thickness of the graphite tray. The graphite tray and the matched graphite supporting rod are assembled through threaded connection, the threaded connection position of the graphite tray and the graphite supporting rod is vertically provided with the screw hole, the graphite bolt is screwed into the screw hole to clamp the graphite tray and the graphite supporting rod to achieve fixation, and the problem that a metal piece cannot be used in a high-temperature environment is solved.
Owner:SHANGHAI JINGCHI CARBON
Adjustable chain hoist supporting sliding seat
Owner:SHANGYOU TENGYUE (WUHAN) TECH CO LTD
Mini-tiller
The utility model relates to the field of agricultural machinery, in particular to a mini-tiller. The handheld operation part is fixed above the power part; the device further comprises a connecting arm, an arc-shaped adjusting block, a plug pin, a rotating shaft, two rear walking wheels, a driving wheel, a driven wheel and a belt. The arc-shaped adjusting block is provided with a plurality of adjusting holes; the connecting arm is fixedly connected with the tillage component; the arc-shaped adjusting block is slidably arranged in the connecting arm; the driving wheel is fixedly connected with the tillage component; the driven wheel is fixed on the rotating shaft; the belt is matched with the driving wheel and the driven wheel; the position of the arc-shaped adjusting block is adjusted through the plug pin, the walking state and the tilling state are switched, the belt is kept tensioned in the switching process, when the belt is switched to the walking state, power can be provided for the belt through the power component, climbing, hilly crossing and the like are facilitated, and therefore the problems that an existing mini-tiller is troublesome to disassemble and replace, and time and labor are wasted are solved.
Owner:CHONGQING GUANTENG MACHINERY