379results about How to "Realize stepless speed regulation" patented technology

The invention relates to a high-speed dynamic simulation test method used for an electric mainshaft bearing. The electric mainshaft bearing comprises a frame, a main body pedestal, an axial loading cylinder, a test head assembly, a main body gland, a radial loading cylinder, a shaft coupling, a protecting hood, an electric mainshaft, a lubricating oil pipe, an axial loading oil pipe, a vibration sensor, a radial loading oil pipe and a temperature sensor and also a final assembly of all the parts. A hydraulic loading system is started to provide pressure oil to the axial loading cylinder and the radial loading cylinder, the electric mainshaft drives a test mainshaft to rotate, the radial loading cylinder exerts radial force on a first test accompanying bearing and a second test accompanying bearing through a radial loading sleeve, and the radial loading cylinder exerts axial force on a first test bearing and a second test bearing through an axial loading sleeve. The entire test is controlled by a computer to display parameters of the rotating speed, the axial load and the radial load, the oil pressure, the cooling water temperature, the bearing temperature, the bearing vibration, the power current of the electric mainshaft and the test time, and the parameters are saved in a computer database and analyzed.

The invention discloses an all-electric driven concrete laser leveler. The all-electric driven concrete laser leveler comprises a vibrating plate module, a scraping plate module, a pull rod module, a walking mechanism, a central control box, a horizontal sensor, a protective shell, a frame, a control panel, a power generator unit, a caster, a power generator unit bottom plate, a pull rod pin, an electric cylinder pin, a motor protective plate, an electric cylinder, a first connecting rod pin, a second connecting rod pin, a connecting rod welding body, an electric push rod, a third connecting rod pin, an electric cylinder connecting rod, a laser transmitter, a vibrating scraping plate module, a laser receiver and other main parts. As an advanced laser control technology and a computer controlled servo driving technology are adopted in the whole machine and the original hydraulic driving system is replaced with an all-electric driving system, the all-electric driven concrete laser leveler disclosed by the invention has the advantages of high automation degree, high construction efficiency, high accuracy, light weight, simplicity in operation, less construction personnel, low construction cost and so on, and is suitable for places with comparatively small loads, such as terraces laid with double-layer reinforcing meshes, floor terraces and so on.

The invention provides a cooling device of a fracturing truck. A support of the integrated cooling device of the fracturing truck is connected with a connection base and a chassis crossbeam connection frame through a shock pad by means of a bolt, a control device and a lubrication oil tank provided with a lubrication oil temperature sensor are arranged below the chassis crossbeam connection frame, a fuel tank provided with a fuel temperature sensor is arranged at the lower portion a truck crossbeam, the upper front portion of the truck crossbeam is provided with a hydraulic oil tank provided with a hydraulic oil temperature sensor, an electrically-controlled volume adjustable hydraulic pump is arranged at the lower portion of the hydraulic oil tank, the electrically-controlled volume adjustable hydraulic pump is connected with an engine provided with a water temperature sensor, and the other side of the engine is provided with a transmission tank provided with a transmission tank oil temperature sensor. A horizontal heat sink is respectively provided with an engine water-cooling device, a power end cooling device, a hydraulic cooling device, a fuel cooling device and a transmission tank cooling device. According to the cooling device of the fracturing truck, a horizontal structure and a concentrated heat dissipation mode are adopted, a pipeline of a cooling system is arranged reasonably, and the requirements for the weight and installation space of vehicle-mounted fracturing equipment are met.

The invention discloses a digital electric-hydraulic synchronous control system, which comprises a hydraulic actuating mechanism, a digital synchronous control mechanism for performing synchronous control on the hydraulic actuating mechanism, an electric-hydraulic power source for providing power oil for the hydraulic actuating mechanism and the digital synchronous control mechanism, and an electric-hydraulic control system for controlling the power source and the synchronous control mechanism. The hydraulic actuating mechanism is a hydrocylinder; the electric-hydraulic power source comprises an oil storage tank, a double-acting hydraulic oil pump and a driving motor; the electric-hydraulic control system comprises a detector for detecting the oil pressure of the hydraulic oil pump and the rotating speed of the motor respectively and a variable frequency speed regulator and a controller for controlling the motor; and the digital synchronous control mechanism comprises a digital synchronization valve, a digital synchronization controller and a displacement transducer for detecting the displacement of an output shaft of the hydrocylinder. The digital electric-hydraulic synchronous control system has the advantages of simple structure, simple and convenient use and operation, good use effect, energy conservation and no oil leakage, and can achieve the aims of stepless speed regulation and high-precision synchronization according to operating characteristic requirements of different types of controlled objects.

The invention relates to a high-temperature high-speed test method for a sealed bearing, which comprises the following steps of: firstly designing a testing device, installing two sets of testing accompanying bearings on a testing main shaft, and pretightening through a set of spring and a pressure ring; installing the two sets of testing bearings at the left end and the right end of the testing main shaft, connecting an electric main shaft through a shaft coupling and additionally covering a shield; starting cooling circulating water, adding cooling water into a loading sleeve, starting a hydraulic station, an electric main shaft variable-frequency driving system and a computer control system, applying 20-30 percent of the maximum axial test load and 20-30 percent of the maximum radial test load to the testing bearings, starting the electric main shaft to reach 15-20 percent of the highest rotational speed and running for 15-25 minutes after the heating temperature reaches a set value, and then sequentially adding axial loads and radial loads and increasing the rotational speed of the electric main shaft so as to reach the highest rotational speed when the power consumption current of the electric main shaft tends to be steady; and carrying out computer data processing for the data and images in different time periods of the whole testing process and working out a test conclusion.

A precise dual-surface polishing machine is composed of machine frame, mainshaft and its drive mechanism, upper polishing disc and its drive unit, lower polishing disc, internal and external toothed rings, planetary gear for holding workpiece, 4 coaxial frequency-conversion motors fro respectively driving coaxial upper and lower polishing discs and external and internal toothed rings, pressure regulating sensors, and pressure regulating valves.

The invention relates to analogue synthesis to gas hydrate in seabed and opposite device as well as the kettle in device system. Wherein, the reaction kettle as the core part can bear pressure and temperature of 3000m water depth, and has high visualization degree and capacity. The system needs low cost, has sufficient monitor method, can take analysis to analogue synthesis and decomposition for gas hydrate in seawater and sand in sea bed, and plays an important role in prospecting gas hydrate. The opposite device comprises: an analogue gas-distribution system for natural gas, a high-pressure pressurizing system for natural gas, a high-pressure visual reaction kettle, a temperature control system for cooling and bath, a parameter control desk, a computer data acquisition system, and a magnetic-force stir system.

The invention relates to an erosion corrosion test device of a seawater piping system metal member, comprising a fluoroplastic centrifugal pump and a water storage tank, wherein the inner side wall of the water storage tank is provided with a cooling system; the inlet of the fluoroplastic centrifugal pump is connected with the water storage tank, and the outlet main line of the fluoroplastic centrifugal pump is connected with a plurality of parallel-connected working pipelines; each working pipeline is sequentially connected in series with a flow regulating valve, a vortex street flowmeter and a working pipe section; the outlet ends of the plurality of parallel-connected working pipelines are communicated with the water storage tank through loops; the outlet main line of the fluoroplastic centrifugal pump is also provided with a by-pass; the by-pass is communicated to the water storage tank; and the working pipe section is also electrically connected with an electrochemical test device. The erosion corrosion test device can realize the erosion corrosion resistant property tests of different pipe samples under approximately completely consistent test conditions of a same medium, same temperature, same flow velocity, and the like and can also be used for researching the erosion corrosion resistant property of a same material under the conditions of different mediums and flow velocities.

The invention relates to an intelligent robot capable of high-speed feeding and discharging. An existing feeding and discharging device is complicated to operate. Accordingly, the intelligent robot capable of high-speed feeding and discharging comprises a stand column and a cross arm, wherein the stand column s provided with a vertical linear guide rail, a lifting block is arranged on the vertical linear guide rail, the cross arm is fixed to the lifting block, the lifting block is driven by a ball screw pair, lead screws of the ball screw pair are driven by a lifting servo motor and sleeved with nuts of the ball screw pair, and the nuts and the lifting block are fixed together. The cross arm is provided with a horizontal linear guide rail provided with a slide block, a telescopic arm is fixed to the slide block, a sucker rack or a manipulator grabbing device is fixed to the front end of the telescopic arm, the slide block is driven by a ball screw pair, lead screws of the ball screw pair are driven by a telescopic serve motor and sleeved with nuts of the ball screw pair, and the nuts and the slide block are fixed together. The intelligent robot has the advantages of being convenient to use, safe and efficient, thereby being suitable for various production enterprises needing workpiece carrying.

The invention discloses a magnetic coupler which comprises a power input shaft, connecting flanges, permanent magnet outer rotor assemblies, cage type inner rotors, a power output shaft and a mechanical speed adjustment device, wherein the permanent magnet outer rotor assemblies have hollow cup-shaped structures, are sleeved outside the cage-type inner rotors and realize transmission of torque under the coupling action of an air gap magnetic field between the permanent magnet outer rotor assemblies and the cage-type inner rotors; the mechanical speed adjustment device can change axial air gap areas between the permanent magnet outer rotor assemblies and the cage-type inner rotors according to a lever theory, thus realizing stepless speed variation for load rotating speed. According to the magnetic coupler, a method for designing the number of pole pairs of the permanent magnet outer rotor assemblies is provided on the basis of a minimum torque ripple rule, so that the thickness of yokes and the rotating inertia of the coupler are reduced. The cage-type inner rotors can adopt structures which are the same as or similar to that of the conventional motor cage rotor iron core. The magnetic coupler disclosed by the invention can be coaxially connected with a load and can be used as a belt wheel adapter matched with a belt wheel.

The invention provides a wind direction tracking wind power generation simulating device, which can solve the problem that the prior art lacks a wind power generation test device used for experimental teaching. The invention has the technical scheme that the wind direction tracking wind power generation simulating device comprises a wind power generation system and a wind source system which are controlled by a control system, wherein the wind power generation system comprises a fixed column, the column is provided with a cross beam which can rotate around the column, and the cross beam is provided with a generator set consisting of impellers and a generator; and the wind source system comprises a windmill and a fan, and the windmill drives the fan to rotate around the wind power generation system. The invention simulates the actual wind power generation device via a lab device, can detect the coming direction of the wind in real time, automatically regulates the direction of the windward side of the generator blade according to the existing wind direction so as to make the blade always face the coming direction of the wind, transfers the existing wind energy into electric energy to the maximum extent, and fills the gap in the market when being used as a teaching instrument.

A magnetic rheology polishing solution rheology testing device comprises a computer, a bracket, a torque measuring device fixed on the bracket, a magnetic field generating device, a shearing mechanism and an actuating device, the torque measuring device, the magnetic field generating device and the actuating device are connected with the computer, the shearing mechanism arranged in the magnetic field generating device comprises a shearing ring and a fixed ring, the shearing ring is fixed on the upper side of the fixed ring, the shearing ring and the external circumference on the fixed ring are respectively arranged with a shearing ring edge and a fixed ring edge which have a certain height, a liquid storing groove which is used for storing the magnetic rheology polishing solution is formed between the shearing ring edge and the fixed ring edge, the upper side of the center of the shearing edge which is discal is arranged with a rotation axis connected with the actuating device, and the lower side of the center of the fixed ring is arranged with a connecting axis connected with the torque measuring device. The invention has the advantages of simple and compact structure, low cost, convenient controlling, stable testing, high precision and the like.

The invention discloses a modulation type brushless permanent magnet dual-rotor motor for a hybrid electric vehicle. The modulation type brushless permanent magnet dual-rotor motor comprises a machine base, wherein a stator, an adjustable magnetic ring rotor, a permanent magnet rotor, an internal stator and an output shaft are arranged in the machine base from outside to inside in sequence; the adjustable magnetic ring rotor is connected to the output shaft of the adjustable magnetic ring rotor to directly drive vehicle wheels; the permanent magnets in the permanent magnet rotor are radially magnetized, and the polarities of the adjacent permanent magnet are opposite; the windings placed on the stator and the internal stator are all three-phase distributed type or concentrated windings; and the adjustable magnetic ring rotor comprises a magnetic conducting material and a non-magnetic-conducting material which are uniformly staggered in a circumferential direction. The modulation type brushless permanent magnet dual-rotor motor provided by the invention is combined with the concentric type magnetic gear design based on magnetic field modulation; a modulation type motor is introduced to a hybrid power synthetic system; the coupling and distribution of the hybrid power, and the stepless speed change of the vehicle are realized; a combination of an electric brush and a collecting ring is omitted, and a part of mechanical gears in the existing system are replaced; due to the radial concentric type arrangement structure, the space utilization ratio is improved; and meanwhile, the power density of the motor, and the transmission efficiency and operational reliability of the system are improved.

The invention relates to a windscreen wiper control system, in particular relates to an intelligent stepless speed change control system for a windscreen wiper, and belongs to the technical field of windscreen wiper control. The intelligent stepless speed change control system for the windscreen wiper mainly comprises a raining monitoring sensor module, a rainfall detecting sensor and a windscreen wiper; the raining monitoring sensor module and the windscreen wiper are mounted on the surface of a windscreen of a car; the rainfall detecting sensor is mounted in a rainwater leaking part below the windscreen; the raining monitoring sensor module is connected with a single chip AT89S5S2; the rainfall detecting sensor is connected with the single chip AT89S5S2 through a chip ADC0809; the windscreen wiper is connected with the single chip AT89S5S2 through a chip LMD 18200; and the power of the intelligent stepless speed change control system for the windscreen wiper is provided with a car storage battery. According to the intelligent stepless speed change control system for the windscreen wiper provided by the invention, the raining monitoring sensor module and the rainfall detecting sensor are adopted for detecting, therefore, high detecting precision is achieved; and moreover, the sensors are unique in design and low in cost; the single chip performs PWM (Pulse Width Modulation) control to a motor of the windscreen wiper, so that real stepless speed change can be achieved; and the manual control and automatic control are combined, thus high humanization is embodied.

The invention relates to an upper-supply and upper-return type air purification system which comprises a gym air exhaust and ventilation integrated cabinet, an air supply ceiling and an exhaust port, wherein the gym air exhaust and ventilation integrated cabinet is used for inputting fresh air and air to be exhausted, treating the fresh air and the air to be exhausted and outputting the fresh air and the air to be exhausted; the air supply ceiling is used for evenly mixing the induced fresh air and returned air, filtering the induced fresh air and the returned air and outputting the induced fresh air and the returned air into a room; and the exhaust port is used for outputting the air to be exhausted in the room to the outside through the gym air exhaust and ventilation integrated cabinet. Through the air purification system, a plurality of treatment functions including ventilation, exhaust, dehumidification, temperature adjustment, purification and the like are achieved at a time, and waste heat/waste cold is utilized so that energy saving can be achieved, the fresh air treatment function and the returned air treatment function are completely separated, and energy saving is achieved; through a fan filter unit (FFU) installed in the position of the air supply ceiling, fresh air is input into the room (upper supply), returned air is sucked through an air return port in the position of the air supply ceiling (upper return), and an independently arranged air return treatment device, an air return pipeline and a passageway are completely omitted; and the returned air and the fresh air can be evenly mixed, and the outlet air quality is improved.

The invention provides an intelligent control system for pig house environment, which belongs to the technical field of pig farm breeding equipment, including STM32 single-chip microcomputer, operation panel, sensor, input module, output module, frequency converter, variable frequency fan contactor, variable speed fan, wet curtain contact device, cooling pad, constant speed fan contactor and constant speed fan. The temperature, humidity and ammonia control parameters of the pig house environment automation control system of the present invention can be adjusted by themselves, and different houses can adjust the control range of temperature, humidity and ammonia according to the needs, so as to give pigs a suitable growth environment, Guarantee the health and growth speed of pigs, and increase the economic benefits of the farm; the system of the present invention adopts highly intelligent and humanized design, fully automatic operation control according to the set parameters, no need for on-site personnel, 24-hour all-weather operation, one-time input, benefit for ten years.

The invention discloses an electromagnetic piston propeller, and relates to ship power. The electromagnetic piston propeller has the advantages that a piston can do work in a reciprocating manner by the aid of electromagnetic force, so that water which flows into a piston barrel can be discontinuously drained, and reacting force can be generated; one end of the piston barrel is closed by an umbrella-shaped cap, the other end of the piston barrel is connected with a barrel which comprises a necked nozzle, and the inside of the piston barrel is divided into two portions for a linear motor and the piston by a partition plate; a rotor of the linear motor can reciprocate via a combination of a shaft and the piston under the effect of movable electromagnetic fields generated by an electrified stator coil, so that the piston can discontinuously carry out water suction and pressurization operation; water flow is constrained in the piston barrel, and accordingly the electromagnetic piston propeller is low in energy loss and high in water pressure.

The invention discloses an upper alternating current draught fan speed regulating system of a gas water heater. The upper alternating current draught fan speed regulating system of the gas water heater comprises a controller, a single phase alternating current program guidance (PG) motor, a controllable transwitch circuit, a motor speed feedback circuit and a zero cross detection circuit, wherein the controllable transwitch circuit, the motor speed feedback circuit and the zero cross detection circuit are respectively connected with the controller. The upper alternating current draught fan speed regulating system of the gas water heater aims at achieving stepless speed regulating of the single phase alternating current PG motor through controlling the size of an electrical angle between the controllable transwitch circuit which is connected with the single phase alternating current PG motor and an alternating current zero crossing point, a well-matched state of gas and air is achieved, and the defects of a draught fan with fixed gears has limited gears are overcome, and problems that burning instability and flameouts of a water heater when air quality is too large or too small and the like are solved.

The invention discloses an electromagnetic lead screw driving type precise-punching presser which comprises a presser body, a working platform, a controller and a stand, wherein the presser body is fixed on the working platform; the stand is arranged above the working platform, and is movably connected with the stand through a connecting plate. The stand is provided with an electromagnetic lead screw system which comprises an electromagnetic nut and a punch shaft. The electromagnetic nut is fixed on the stand, and comprises two circular cores. Each circular core is divided into two parts by a coil. A circular permanent magnet is clamped between the two cores. The punch shaft penetrates through the stand and the electromagnetic nut, and has a gap with the electromagnetic nut. Threads which have the same pitch are processed at the inner hole side of the circular core and the part of the punch shaft. The controller is used for controlling the density, the frequency and the phase of the current in the coil. The invention has the advantages of adjustable speed and punch force, quick response, high guiding and positioning precision, simple structure, convenient control, less component consumption, low noise, convenient maintenance and long service life.

The invention discloses a mechanical mechanism which converts reciprocating motion power into rotary power for output and can realize stepless speed regulation. A power source pulls a rope; the rope pulls a rope drum to rotate; and the rope drum drives a power output shaft to rotate through an overrunning clutch; or the power source drives an oscillating bar to oscillate; a rope tractor on the oscillating bar pulls the rope; the rope pulls the rope drum to rotate; and the rope drum drives the power output shaft to rotate through the overrunning clutch. Because the position of the rope tractor on the oscillating bar can be adjusted, the rotating ratio of the moment to the speed between the power source and the power output shaft can be adjusted by adjusting different positions of the rope tractor on the oscillating bar. The mechanical mechanism has the advantages of high efficiency and simple structure, and capacity of realizing the stepless speed regulation; and the power source can be a cylinder or human power or animal power. The mechanical mechanism can be applied to internal combustion engines, bicycles, and other machinery, or can be applied to equipment needing the stepless speed regulation.