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44results about How to "Adjust displacement" patented technology
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Power match control equipment, method, system and engineering machinery
ActiveCN103362666AAdjustable speedAdjust displacementEngine controllersPump controlLower limitMotor drive
The invention discloses power match control equipment, a power match control method, a power match control system and engineering machinery comprising the power match control system. The power match control equipment comprises a receiving device for receiving the load rate of a motor, and a controller for adjusting the rotary speed of the motor or the discharge of a hydraulic pump according to the load rate of the motor so as to enable the load rate of the motor to be positioned between the upper limit allowable load rate and the lower limit allowable load rate of the motor, wherein the motor drives the hydraulic pump to work. Through the technical scheme, as the load rate can comprehensively reflect the load change of the motor, the load of the motor can be accurately positioned between the upper limit allowable load rate and the lower limit allowable load rate of the motor by performing power match control according to the load rate, and the efficiency and the stability of the motor can be improved.
Owner:ZOOMLION HEAVY IND CO LTD
Method for reinforcing existing municipal pipe gallery within deep foundation pit excavation range
ActiveCN104674863APlay a supporting roleAvoid deformationFoundation repairBulkheads/pilesSupport pointBuilding construction
The invention relates to a method for reinforcing an existing municipal pipe gallery within a deep foundation pit excavation range, and is particularly applied to the condition of excavating a large-sized foundation pit when a municipal pipe gallery exists in a thick alluvial formation. The method comprises the following steps: constructing ordinary precast piles and pipe gallery reinforcement precast piles, wherein reserved connection devices are arranged on the pipe gallery reinforcement precast piles; excavating a foundation pit soil body from top to bottom until the reserved connection devices on the pile bodies are exposed; simultaneously pouring a pipe gallery support structure taking a soil model as a template below the pipe gallery and beams on two sides of the pipe gallery by taking the reserved connection devices of the pipe gallery reinforcement precast piles as support points; constructing anchor ropes, wherein one end of each anchor rope is anchored onto the corresponding beam, and the other end of each anchor rope is connected with a top beam on the corresponding pipe gallery reinforcement precast pile; continuing excavating the residual foundation pit soil body to a baseline of the foundation pit, constructing air duct structures, and integrally pouring waist beams of the foundation pit and air duct top plates to finish the construction. According to the method, the stability of the soil body around air ducts during the excavation of the air ducts is ensured, and the influence of excavation of the soil body on the lower part on the pipe gallery is reduced, and the pipe gallery is supported in advance.
Owner:JINAN RAILWAY TRANSPORT GRP CO LTD
Clinical adjustable four-limb rehabilitation device for neurology department
InactiveCN110339017AAdjust tractionEasy to adjustChiropractic devicesNeurology departmentPhysical medicine and rehabilitation
The invention belongs to the technical field of medical apparatuses and instruments and particularly relates to a clinical adjustable four-limb rehabilitation device for the neurology department. In order to overcome the defects that the pull force of most existing rehabilitation devices cannot be adjusted, the four-limb rehabilitation devices cannot meet the demands of different patients, the positions of seats of the rehabilitation devices are inconveniently adjusted, and the comfort degree of rehabilitation treatment is influenced, the following scheme is proposed. The device comprises a baseplate, a base is movably installed at the top side of the baseplate, a seat is movably installed at the top side of the base, and a U-shaped rack is fixedly installed at the top side of the baseplate; a fixing rod is fixedly installed at the side, close to the seat, of the U-shaped rack, and a first through hole is formed in the inner wall of the top side of the U-shaped rack. According to the clinical adjustable four-limb rehabilitation device for the neurology department, the traction force of the hands and legs can be adjusted, the four-limb rehabilitation treatment demands of different patients can be met, the height and position of the seat can be conveniently adjusted, the comfort degree of the patients during four-limb rehabilitation treatment is improved, and the device is convenient to use and meets the application demand.
Owner:孙立华
Axial piston variable pump with four oil ports and low-noise parallel distribution structure
ActiveCN107061212AAdjust the tilt angleAdjust displacementPositive displacement pump componentsPositive-displacement liquid enginesLow noiseTop dead center
The invention discloses an axial piston variable pump with four oil ports and low-noise parallel distribution structure. The pump comprises a shell, a front cover, a rear cover, a main shaft, a swash plate cradle, a set plate, a cylinder block, a valve plate, pistons, sliding shoes, a bearing, a variable control mechanism, etc. The cylinder block of the pump is provided with ten piston holes divided into two groups, and each group includes five piston holes located on different reference circles respectively; the pistons are fit to the piston holes of the cylinder block; the center of the cylinder block is provided with a spline hole, and the main shaft penetrates through the cylinder block, and is fit to the spline hole; a friction pair is formed by the distribution end surface of the cylinder block and the valve plate, and another friction pair is formed by the sliding shoes of the pistons in the piston holes of the cylinder block and the swash plate cradle; the upper distribution plane of the rear cover is in static connection with the corresponding end surface of the valve plate; the valve plate adopts a window structure of inner and outer ring distribution, and oil absorption and discharge distribution windows are of parallel double-ring structures which are symmetrical by taking the connecting line passing a top dead center and a bottom dead center as an axis; the rear cover is provided with four oil ports which are independent respectively; and the piston pump has different working modes through combining the four oil ports.
Owner:TAIYUAN UNIV OF TECH
Self-limiting impact type jetting glue-dispensing device
InactiveCN106000778AAdjust displacementControl jet forceLiquid surface applicatorsCoatingsSelf limitingEngineering
The invention relates to the technical field of jetting glue-dispensing devices and particularly relates to a self-limiting impact type jetting glue-dispensing device. The self-limiting impact type jetting glue-dispensing device comprises a valve body with a cavity and a glue supplying base with a jetting cavity, wherein a push rod is arranged in the cavity, and a driver for driving the push rod is arranged in the cavity; a glue inlet and a glue outlet are formed in the jetting cavity of the glue supplying base, an impact rod is arranged above the glue outlet, is mounted in the jetting cavity in a sliding manner by virtue of a limiting nut and is driven by the push rod, and the limit impact position of the impact rod is limited by the limiting nut. When the self-limiting impact type jetting glue-dispensing device is used for jetting glue, the impact rod does not directly collide with a nozzle but collides with the limiting nut, so that particles are not crushed under the impact of the impact rod when liquid with the particles is jet.
Owner:NANJING YITUOSEN PRECISION ELECTRONICS
Cantilever crane type concrete transport pump
InactiveCN1715651AAdjust displacementFlexible moving processPump controlPumpsLoad sensingHydraulic pump
The cantilever crane type concrete transmission pump consists of chassis, pumping system and distributing rods. It features the chassis, which is made by Nissan Isuzu Co., Ltd., reaches to European's II exhaust standard and has highest running speed of 90 km / hr for fast reaching the site; the distributing rods in two section arm double cylinder support structure and with load sensing technology adopted; and the hydraulic pumping system operating in double pump cocurrent technology. The present invention has high distributing rod stability, high hydraulic pump rotation speed and no air sucking trouble.
Owner:上海鸿得利重工有限公司
Application method of cylinder workpiece high-precision drilling fixture
InactiveCN104708411AAdjust displacementAccurately adjust the displacementPositioning apparatusMetal-working holdersEngineeringMachining
The invention relates to an application method of a cylinder workpiece high-precision drilling fixture. The application method comprises the following steps: (1) a baseplate is fixedly connected to a console; (2) a cylinder workpiece is put on a V-shaped support block, and is inserted into a positioning hole, so that the end of the workpiece is pressed against the end part of a screw rod; (3) the screw rod rotates to enable the workpiece to perform the translational motion in the axial direction of the positioning hole in the horizontal direction; and (4) after the position of the workpiece is determined, the workpiece is drilled through a drilling mold. The application method has the advantages of simple structure, flexibility and convenience for use, simple clamping and high machining precision.
Owner:WUXI CHANGXIN MACHINERY MFG
Robot for loading and unloading materials in heating furnace
InactiveCN110239948AEasy to surroundEasy to adjust displacement as neededCharge manipulationConveyor partsLocking mechanismHeating furnace
The invention discloses a robot for loading and unloading materials in a heating furnace. The robot comprises a body part and a clamping part; the body part comprises a chassis, a movable platform, a stand column, a first rotary device, a cantilever and a second rotary device; the clamping part comprises a frame body, a plurality of connecting seats and a plurality of mechanical arms which are in one-to-one correspondence with the connecting seats; each connecting seat comprises a barrel body, a connecting shaft and a locking mechanism; each mechanical arm comprises a seat body connected with the corresponding connecting shaft; and two clamping blocks, a clamp mechanism and a power mechanism are sequentially arranged at the lower end of each seat body from left to right. According to the robot, the body part is arranged, so that the clamping part can be conveniently moved to load and unload the materials according to needs; and the mechanical arms are arranged, and a rod material can be loaded or taken out of each layer in the heating furnace, so that the loading or taking-out efficiency of the rod material is improved.
Owner:CHONGQING UNIV OF ARTS & SCI
Powder feeding device and using method thereof
InactiveCN105803451AHigh flexibilityImprove cladding qualityMetallic material coating processesEngineeringNozzle
The invention relates to a powder feeding device and a using method thereof and belongs to the technical field of laser cladding. The powder feeding device comprises a fixing part and a powder feeding nozzle, wherein a regulation device is arranged between the fixing part and the powder feeding nozzle and is composed of a horizontal regulation part and a vertical regulation part; and the vertical regulation part is arranged in the horizontal regulation part. The powder feeding device is capable of regulating the distance between a powder outlet and the surface of a substrate, has the characteristics of high regulation accuracy, convenience and rapidness in operation, strong practicability and high economic benefit and is beneficial to improving the effective availability of cladding powder and the cladding quality.
Owner:SHANDONG ENERGY HEAVY EQUIP GRP DAZU REMANUFACTURING CO LTD
Urban management garbage solid-liquid separation device
InactiveCN111731708AEasy to handleEasy to pourRefuse receptaclesRefuse cleaningWastewaterRefuse Disposals
The invention provides an urban management garbage solid-liquid separation device. A movable seat is arranged below an extrusion plate and is slidably mounted in a collection tank and a baffle; a water through cavity is formed in the movable seat; a dredging pipe is fixedly connected to the bottom of the water through cavity; and an air bag is arranged on the lower surface of the movable seat. A moving seat moves up and down in a guide rail, when the moving seat moves upwards and a connecting column and an adjusting frame move out of an auxiliary frame, a convex column on the adjusting frame touches the auxiliary frame, the direction of the adjusting frame is changed by combining a compression spring, thus the extrusion plate is driven to turn garbage clockwise by 180 degrees, and waste water in the solid garbage is poured conveniently; and compression is conducted between the extrusion plate and the movable seat, the waste water in the solid-liquid coexisting garbage is extruded intothe water through cavity in the movable seat and conveyed into a settling tank, thus the purpose of separating the solid garbage from the waste water is achieved, and the subsequent garbage treatmentprocedure is conducted conveniently.
Owner:梧州无量科技有限公司
Epoxy resin film
The invention belongs to the technical field of epoxy resin films, and particularly relates to an epoxy resin, film which is prepared from the following raw materials in parts by weight: 40-60 parts of E44 epoxy resin, 30-50 parts of hydrogenated butadiene-acrylonitrile rubber, 3-5 parts of inorganic mixed filler, 6-10 parts of phospholipid molecule solution, 2.5-5 parts of curing agent and 6.5-7-10 parts of polyvinyl chloride paste resin. The preparation method includes following steps: adding a mixture of E44 epoxy resin, hydrogenated butadiene-acrylonitrile rubber, a curing agent and polyvinyl chloride paste resin into an acetone solution to obtain a blended solution; and adding a phospholipid molecule solution and an inorganic mixed filler into the blended solution to obtain a uniformly dispersed solution. A roller rotates back and forth to drive the two ends of the flattening tank body to move upwards and sink intermittently through the pull ropes, and then an epoxy resin solutioncan be uniformly and efficiently spread in the flattening tank body to reach a self-leveling state; a vibration exciter is arranged at the bottom of the flattening tank body, wherein the vibration exciter enables the bottom of the flattening tank body to be in a vibration state, so that the epoxy resin solution is more uniformly spread.
Owner:芜湖桦振新材料科技有限公司
Adjustable constant-shooting-speed rock breaking sprayer
ActiveCN114370235AExtended service lifeAdjust displacementLiquid/gas jet drillingInjection portSprayer
The invention relates to an adjustable constant-shooting-speed rock breaking sprayer which comprises a shell and a spraying pipe, a pressure bearing part is formed at one end of the spraying pipe, the other end of the spraying pipe is provided with a spraying opening communicated with the interior of the spraying pipe, and the spraying pipe is arranged in the shell in a sliding mode. A plurality of drainage holes are formed in the shell; when the flow of the liquid entering the shell in unit time is equal to or smaller than the preset jet flow, the jet pipe blocks each drainage hole, and the liquid entering the shell flows through the jet pipe and is jetted out from the jet orifice; when the flow of the liquid entering the shell in unit time is larger than the preset jet flow, the liquid entering the shell pushes the jet pipe to slide in the direction away from the first opening end, at least part of the drainage holes recover to be communicated with the shell, and part of the liquid in the shell is discharged out of the drainage holes. The injection flow of the injection port to the liquid is equal to the preset injection flow. The technical problem that a nozzle used for jet flow rock breaking cannot provide stable jet speed is solved.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Driving device and displacement transmitting component
The invention discloses a driving device and a displacement transmitting component. The displacement transmitting component comprises a seat body, a thruster, an elastic piece and an actuator. Specifically, an actuating channel is arranged inside the seat body, the thruster is arranged at a first end inside the actuating channel, a part of the thruster stretches out of the actuating channel, the elastic piece is respectively connected with the thruster and the seat body, the elastic piece has force which often pushes the thruster to move towards the inner portion of the actuating channel, the actuator is arranged inside the actuating channel, and the actuator is contacted with the thruster. According to the displacement transmitting component, the amount of displacement which the thruster transmits to a mirror body can be adjusted quickly and accurately, and precision and rapidity of the displacement transmitting component are improved.
Owner:TSINGHUA UNIV
Mining robot omni-directional detection mechanical arm
PendingCN113752270AGuaranteed normal rotationAdjust displacementProgramme-controlled manipulatorArmsGear wheelEngineering
The invention relates to the field of robots, in particular to a mining robot omni-directional detection mechanical arm. The mining robot omni-directional detection mechanical arm comprises a fixing mechanism, a steering mechanism, an extension mechanism and a detection mechanism. Through the clamping effect between a convex cake groove in an adapter sleeve ring and an anti-falling circular plate at one end of a rotating main shaft, it can be guaranteed that the displacement of a rotating main shaft can be adjusted through the driving force of a pneumatic cylinder, meanwhile, angle adjustment of the rotating main shaft is not affected, the anti-falling circular plate at the front end of the rotating main shaft can rotate in the convex cake groove, and the adapter sleeve ring does not rotate along with the rotating main shaft; the position of an inner sleeve sliding rod is controlled through the connection state between a synchronous sleeve and a synchronous bevel gear, and then the length of the extension mechanism is controlled, so that the detection range of the mechanical arm is controlled; when the inner sleeve sliding rod contracts, the mechanical arm is small in overall size, direction adjustment is facilitated, and the detection range is large; and when the inner sleeve sliding rod extends, the detection depth of the mechanical arm is large, detection can be conducted more accurately, and meanwhile the mechanical arm can extend to a narrow space for detection.
Owner:车亮
Double-swashplate plunger pump
PendingCN108869223AChange displacementDisplacement stepless adjustmentPositive-displacement liquid enginesMulti-cylinder pumpsHydraulic cylinderControl valves
The invention belongs to the field of plunger type motor pumps and specifically discloses a double-swashplate plunger pump. The plunger pump comprises a cylinder, a plunger, a first swashplate component and a second swashplate component and is characterized in that the first swashplate component and the second swashplate component are symmetrically arranged on two end faces of the cylinder, a displacement regulating mechanism is connected to at least one swashplate and comprises a connecting rod component, a piston type hydraulic cylinder and a control valve, the swashplate, the connecting rodcomponent and the piston type hydraulic cylinder are sequentially connected, and the piston type hydraulic cylinder is connected with the control valve. The double-swashplate plunger pump has the advantages that the movement of each piston type hydraulic cylinder is controlled through the corresponding control valve so as to drive the corresponding connecting rod component to move, the connectingrod component drives the corresponding swashplate to move to change the dip angle of the swashplate so as to change the displacement of the plunger pump, flow distribution of the plunger pump is achieved through a flow distribution device, stepless displacement regulation is achieved, and high regulation precision and wide regulation range are achieved.
Owner:HUAZHONG UNIV OF SCI & TECH
A stool seat motion controller with a plurality of electric push rods and a motion control algorithm
InactiveCN106155107AGuaranteed uptimeImprove experienceControl using feedbackKinematic controllerControl system
The invention relates to a stool seat motion controller with a plurality of electric push rods and a motion control algorithm. According to the invention, particularly, the precise speed and displacement of the electric push rods can be controlled in a multidimensional mode so as to adjust the height and inclination of the stool seat. The stool seat motion controller with three or four electric push rods comprises a power supply module for supplying power to the entire system; an electric push rod system, in which the three or four electric push rods provide support and assistance for the seat; and a control system controlling the coordinated movement and feedback processing of the three or four electric push rods and precisely controlling the speed and position of the push rods according to input of operation by a user. According to the invention, shortcomings that existing stool seats can not perform multi-dimensional precise movement are overcome; the movement of the stool seat is stable; the control is precise; the structure is simple; and a better experience effect is brought for the user.
Owner:PEKING UNIV SHENZHEN GRADUATE SCHOOL
Variable load adjusting device and seawater desalination system and method
PendingCN106186409ALarge displacementHigh recovery rateWater/sewage treatment by irradiationGeneral water supply conservationWorking capacityPlunger pump
The invention relates to the technical field of seawater desalination, in particular to a variable load adjusting device and a seawater desalination system and method. The variable load adjusting device comprises a water hydraulic axial plunger pump, an energy recycling device, a frequency converter, a double shaft extension motor and a control device. The control device is electrically connected with the frequency converter. The frequency converter is electrically connected with the double shaft extension motor and used for adjusting the rotating speed of the double shaft extension motor. The main shaft extension end of the double shaft extension motor is connected with a driving shaft of the water hydraulic axial plunger pump through a coupler, the auxiliary shaft extension end of the double shaft extension motor is connected with the water hydraulic energy output end of the energy recycling device, and the control device is electrically connected with the water hydraulic axial plunger pump and used for controlling the discharge capacity of the water hydraulic axial plunger pump. The seawater desalination system comprises the variable load adjusting device. The invention further provides a seawater desalination method. The recycling rate of the system can be adjusted, and the continuous working ability and the adaptive capacity of the system for external energy input fluctuation are improved on the premise of lowering energy consumption.
Owner:赛腾机电科技(常州)有限公司
Multi-stage pulp proportioning device for processing and producing molded pulp tableware
PendingCN113186758AAdjust QuantitativeAdjust the movable rangeTextiles and paperRotational axisWorm drive
The invention discloses a multi-stage pulp proportioning device for processing and producing molded pulp tableware, relates to the technical field of pulp processing, and solves the problems that: currently used pulp proportioning devices are not provided with a quantitative adjustment structure convenient for rapid adjustment, and cannot rapidly adjust the displacement of a mold according to the capacity of the mold. The multi-stage pulp proportioning device for processing and producing molded pulp tableware comprises: a base, wherein a transmission belt is rotationally arranged at the top of the base through a stand column; and a loading mold, wherein rotating shafts are fixedly arranged on the two sides of the loading mold, and the rotating shafts are rotationally arranged on the top of the transmission belt. By arranging a nut sliding block, a function of rapidly adjusting the displacement of the mold according to the capacity requirement of the mold is provided for the pulp proportioning device; a worm gear drives a worm rod to rotate through transmission; a lead screw drives the nut sliding block to move through thread transmission; the movable range of an outer shaft is further adjusted; and meanwhile, the movement amplitude of a piston rod is adjusted, and the quantification of the pulp proportioning is adjusted.
Owner:浙江博特生物科技有限公司
Discharger capable of automatically adjusting discharge capacity
PendingCN107726879AWon't leakAdjust displacementSteam/vapor condensersPulp and paper industryGroup level
The invention provides a discharger capable of automatically adjusting the discharge capacity. The discharger comprises a shell, a liquid level floating ball, piston assemblies, a discharge hole assembly and a filter screen, wherein the piston assemblies are arranged on the liquid level floating ball, the liquid level floating ball is arranged in the shell, the discharge hole assembly is arrangedon the lower portion of the liquid level floating ball, the filter screen is arranged on the upper portion of the discharge hole assembly, and the liquid level floating ball is located in the filter screen. By adopting the technical scheme, the discharger has the beneficial effects that when condensate water is discharged, automatic discharge adjusting can be conducted according to discharge capacity changes of the condensate water, and it is guaranteed that not only can steam be not leaked, but also water can not be stored; and a fixed piston assembly and movable piston assemblies are arranged on the liquid level floating ball, vertical position adjusting is conducted according to the principle that the gravity of the liquid level floating ball in liquid and the buoyancy force borne by the liquid level floating ball in liquid are balanced, therefore, pistons and discharge holes can achieve close contact or be separated, then discharging is conducted, and the discharger can achieve discharge capacity adjusting.
Owner:张荣革
One-axis integrated three-dimensional movement printing axis adjustment device
ActiveCN109605912BAdjust displacementRegulating pressureRotary pressesPrinting press partsAxial displacementIndustrial engineering
Owner:GUANGDONG HUASHENG PLASTIC
Control method for constant speed of hydraulic motor of multifunctional spraying vehicle and multifunctional spraying vehicle
ActiveCN108005889BConstant speedAdjust displacementSpraying vehiclesHydro energy generationHydraulic motorControl system
The invention belongs to the technical field of vehicle control and particularly relates to a control method of the constant rotating speed of a hydraulic motor of a multifunctional spraying vehicle and the multifunctional spraying vehicle. The method comprises the following steps that hydraulic system efficiency values under delivery capacities of m different hydraulic pumps and rotating speeds of n different engines are calculated, a system efficiency graph with m*n points is generated, the system efficiency graph is input into a feed-forward controller, under the delivery capacities of thedifferent hydraulic pumps and the rotating speeds of the different engines, the system efficiency graph is searched for determining a new hydraulic pump set delivery capacity, the hydraulic pump finaldelivery capacity is calculated and obtained according to the hydraulic pump set delivery capacity newly determined and a hydraulic pump delivery capacity correction value, and it is ensured that therotating speed of the hydraulic motor is constant. By using the control method of the constant rotating speed of the hydraulic motor of the multifunctional spraying vehicle and the multifunctional spraying vehicle, precision of feed-forward control can be improved effectively, it is ensured that the control system can adjust the hydraulic pump delivery capacity fast and accurately, it is ensuredthat the rotating speed of the hydraulic motor is constant, and uniformity of water flow spraying is ensured.
Owner:WEICHAI POWER CO LTD +1
Valve arrangement
ActiveCN102959293BSave spaceReduce manufacturing costOperating means/releasing devices for valvesServomotor componentsVALVE PORTPressure regulator
Owner:ROBERT BOSCH GMBH
Lifting device of electric submersible piston pump in horizontal wells
ActiveCN100510401CAdjust displacementFlexible member pumpsFluid removalHorizontal wellsPermanent magnet linear motor
A lifting device for an electric submersible plunger pump for a horizontal well. It mainly solves the problem that the existing horizontal well lifting device adopts electric submersible pump and hydraulic jet pump, which leads to high investment and large displacement and cannot meet the needs, while the use of rod pumps cannot solve the problems of eccentric wear between rods and pipes. It is characterized in that: the device also includes a small-diameter high-elastic permanent magnet linear motor (44) and a horizontal lift pump (43), and the small-diameter high-elastic permanent magnet linear motor (44) is mainly composed of a stator and a moving The horizontal lifting oil well pump (43) is composed of a fixed valve, a pump barrel (23), a plunger (22) and two moving valves, the small diameter and high elasticity permanent magnet straight line The stator part of the motor (44) is connected with the pump cylinder (23), and the mover part is connected with the plunger (22). This kind of device has low production cost, can work under small displacement, can solve the problem of eccentric wear between rods and pipes, can produce under any flow pressure, and ensures reasonable flow pressure of horizontal wells.
Owner:DAQING OILFIELD CO LTD +1
A variable displacement double-acting radial piston pump
ActiveCN109826790BAdjust displacementDisplacement can be adjustedRotary piston pumpsRotary piston liquid enginesRadial piston pumpMechanical engineering
The invention relates to a variable double-acting radial plunger pump which comprises a shell, a contraction ellipsoid stator, an axial adjusting ring, a rotor mechanism, a flow distribution shaft andan end cover. According to the variable double-acting radial plunger pump, a fixed stator with an inner curve surface as an ellipsoid in a traditional double-acting radial plunger pump is designed tobe the contraction ellipsoid stator with an inner curve surface as a contraction ellipsoid and capable of moving axially, and the axial movement of the contraction ellipsoid stator is adjusted, so that the aim of adjusting the displacement of the double-acting radial plunger pump is achieved. The pump has the characteristics of high flow, small pulsation coefficient, balanced radial force and capability of adjusting the displacement.
Owner:ANHUI UNIV OF SCI & TECH
Fracturing slickwater and fracturing fluid online continuous mixing device and using method
InactiveCN112452196ATo prevent precipitation and solidificationAdjust displacementTransportation and packagingRotary stirring mixersFracturing fluidEngineering
The invention relates to afracturingslickwater and fracturing fluid online continuous mixing device, which comprises a base, the top end of the base is fixedly connected with a roots pump, the other side of the roots pump is fixedly connected with a leading-in pipe, the other end of the leading-in pipe is fixedly connected with a storage tank, a feeding mechanism is installed in the storage tank,two bearing plates are arranged in the feeding mechanism, and the two bearing plates are connected with the two sides of the storage tank in a welded mode correspondingly. According to the device, mother liquor can be stored through the storage tank, a hydraulic telescopic rod can drive a cover plate to move up and down to block or expose the open end of the storage tank, the mother liquid can beadded through the opening end of the storage tank, after liquid adding is completed, the opening end is blocked, so that dust and impurities can be prevented from entering the storage tank to pollutethe mother liquid and cause blockage of the device, and through a second motor, a stirring paddle can be driven to rotate to stir the mother liquor in the storage tank, and the situation that the mother liquor is precipitated and solidified can be prevented.
Owner:张靓
A reinforcement method for the existing municipal utility gallery within the scope of deep foundation pit excavation
ActiveCN104674863BRealize large area excavationGuaranteed stabilityFoundation repairBulkheads/pilesSupport pointBuilding construction
Owner:JINAN RAILWAY TRANSPORT GRP CO LTD
Power matching control device, method, system and construction machinery
ActiveCN103362666BAdjustable speedAdjust displacementEngine controllersPump controlLower limitMotor drive
Owner:ZOOMLION HEAVY IND CO LTD
Internet-of-things intelligent fire-fighting inspection system and method
ActiveCN114796946APut in smoothlyAdjust the tilt angleFire rescueClosed circuit television systemsElectric machineryStructural engineering
The invention provides an Internet of Things intelligent fire-fighting inspection system and method, a fire-fighting aerial ladder is carried on a fire-fighting truck, a clamping mechanism is fixed at the tail end of the fire-fighting aerial ladder, and an inspection device is clamped by the clamping mechanism; the inspection device comprises a hemispherical base and a sliding rod fixed to the upper portion of the base, a first screw rod is arranged in the sliding rod, the bottom of the first screw rod is rotationally connected with the base through a bearing, and a gap is reserved between the sliding rod and the first screw rod. When the third air cylinder or the fourth air cylinder is independently subjected to air exhaust or air injection operation, the inclination angle of the base can be adjusted; when the third inflator and the fourth inflator are simultaneously exhausted, the inclination direction of the base and the displacement of the base can be adjusted through the first motor; and when air is injected into the third air cylinder and the fourth air cylinder at the same time, the height of the camera on the sliding rod can be adjusted through the first motor, and the protective cover can be cleaned.
Owner:湖南大汉无忧智慧科技有限公司
Well-head hydraulic signal generating device and operating method thereof
The invention relates to a well-head hydraulic signal generating device and an operating method thereof. The well-head hydraulic signal generating device is characterized by comprising a hydraulic oil source, power units, overflow valve banks and pressure test systems. The hydraulic oil source comprises an oil tank, wherein, the side wall of the oil tank is equipped with a temperature sensor and a liquid level sensor, the oil tank is internally equipped with an oil pipeline with a hydraulic oil filter, and the other end of the oil pipeline is connected with the power units; each power unit comprises a hydraulic pump driven by a variable frequency motor, wherein, an input terminal of the hydraulic pump is connected with the oil pipeline, an output terminal of the hydraulic pump is connected with a hydraulic signal pipeline, and the hydraulic signal pipeline is sequentially equipped with a check valve, a pipeline oil filter and a pipeline stop valve; and each overflow valve bank comprises an overflow pipeline, wherein, the overflow pipeline is connected on the hydraulic signal pipeline between the corresponding check valve and pipeline oil filter, an output terminal of the overflow pipeline is connected with a two-position two-way solenoid directional valve and a pilot overflow valve in parallel, an output terminal of the pilot overflow valve is connected with an H-type two-position four-way solenoid directional valve, and an output terminal of the two-position four-way solenoid directional valve is connected with two overflow valves in parallel.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Rotary anti-swing control method of mobile hoisting equipment
ActiveCN112551374AConforms to the real motion trajectoryQuickly return to a stable stateLoad-engaging elementsMechanical modelsControl engineering
The invention discloses a rotary anti-swing control method of mobile hoisting equipment. The rotary anti-swing control method comprises the following steps that S1, a simplified mechanical model of amobile port crane is established; S2, according to the Lagrange equation, kinetic analysis is conducted on swing of the hoisting load, and a kinetic equation of heavy object motion is deduced; S3, thedisplacement of a lazy arm and the swing angle of the hoisting load are calculated according to the kinetic equation of the lazy arm and the hoisting load; and S4, a numerical value of driving torqueis optimized through a PID controller, and the hoisting load rapidly reaching a designated position and anti-swing control over the lazy arm are achieved. According to the dynamic analysis and anti-swing control based on the PID mobile hoisting equipment, when the lazy arm does rotary motion, the hoisting load can run more stably, and swing is eliminated rapidly after the hoisting load reaches the designated position.
Owner:SOUTHEAST UNIV
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