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208results about How to "Timely braking" patented technology

Blade fault diagnostic method based on strain energy response of wind-driven generator

The invention relates to a blade fault diagnostic method based on a strain energy response of a wind-driven generator, which comprises the following steps of: (1) obtaining the natural frequencies and the modes of the first M orders of the blade of a wind generator set by performing dynamic modeling and model analytical calculation to the wind generator set; (2) simulating the rotational excitation load of the blade through finite element calculation to the wind generator set to obtain strain energy time domain responses corresponding to the cabin sensor set points of the first M orders of the blade of the wind generator set, and then calculating strain energy frequency domain responses; and (3) obtaining the running state characteristic values of the blade of the wind generator set from the strain energy frequency domain responses corresponding to the cabin sensor set points of the first M orders of the blade of the wind generator set through the strain energy and the rate of change thereof and the method of a support vector machine, and then comparing to obtain a diagnostic result. The blade fault diagnostic method based on the strain energy response of the wind-driven generator related to the invention is simple and easy, high in sensitivity and accuracy and low in diagnostic cost, and can effectively improve the safety and reliability of the blade of the wind generator set and accurately perform fault point positioning, fault qualification and prediction for the blade.
Owner:TIANJIN POLYTECHNIC UNIV

Automotive braking automatic auxiliary system and control method thereof

The invention discloses an automotive braking automatic auxiliary system and a control method thereof. The automotive braking automatic auxiliary system comprises a power supply module and an electronic controller; the electronic controller is connected with a road surface selecting unit, a speed monitoring device, a road surface humidity sensor, a distance measuring sensor, an alarm module and a brake parachute system; the power supply module provides power for the electronic controller and the brake parachute system. The control method includes that the safe driving distance is calculated out through the electronic controller according to the current speed and the road surface driving environment; the relation between the current actual distance and the safe distance is measured out through the distance measuring sensor; an appropriate control instruction is given out through the electronic controller according to the relation between the current actual distance and the safe distance. According to the automotive braking automatic auxiliary system and the control method thereof, real-time all-around monitoring can be performed on the driving environment, the driving pressure of drivers can be reduced, and the safe driving under different environmental road surfaces can be ensured.
Owner:GUANGDONG COMM POLYTECHNIC

Vehicle power control method and system, computer readable storage medium and vehicle

The invention discloses a vehicle power control method and system, a computer readable storage medium and a vehicle. The vehicle power control method comprises the steps that the accelerator pedal opening is obtained and whether an accelerator pedal is stepped on or not is judged; on-off information of a brake pedal is obtained and whether the brake pedal is stepped on is analyzed; a pressure value of a brake master cylinder is obtained; vehicle demand power is explained according to the opening of the accelerator pedal in response to the accelerator pedal not being stepped on; the vehicle demand power is explained according to the opening of the accelerator pedal in response to the accelerator pedal being stepped on and the brake pedal not being stepped on; in response to the acceleratorpedal and the brake pedal both being stepped on, the pressure value of the brake master cylinder is more than a pressure threshold value Prs1, the time of the accelerator pedal and the brake pedal both being stepped on is more than or equal to a threshold value T1, the whole vehicle demand power is analyzed according to the pressure value of the brake master cylinder and the opening of the accelerator pedal, if not, the vehicle demand power is explained according to the opening of the accelerator pedal, but a power threshold value Pwr3 cannot be exceeded. The vehicle power control method guarantees the safety, and has a good driving experience.
Owner:深蓝汽车科技有限公司

Novel crane luffing mechanism

The invention provides a novel crane luffing mechanism which plays the role of double brake protection on a roller and an arm support luffing mechanism and improves the safety of a crane. The novel crane luffing mechanism comprises a motor, a control system, high-speed shaft brakes, a reduction gearbox, a winding drum, a winding drum support and a steel wire rope wound on the winding drum, wherein the high-speed shaft brakes are arranged at the two sides of the high-speed shaft end of the reduction gearbox, at least one end of the winding drum is provided with a disc type low-speed shaft brake, and a brake disc of the disc type low-speed shaft brake is fixed with the winding drum into a whole on the end face of the winding drum. According to the invention, the disc type low-speed shaft brake is additionally arranged at the end part of the winding drum, so that the disc type low-speed shaft brake can brake the winding drum and the arm support luffing mechanism when great faults such as the failure of the high-speed shaft brakes at the high-speed shaft end of the reduction gearbox, the tooth breaking of the reduction gearbox, the shaft breaking and the like, thereby ensuring the safety of the arm support luffing mechanism and the whole machine; and the rotating speed of the winding drum can be detected in real time through the arrangement of a rotating speed detector, and the wind drum can be braked quickly, so that the safety of the equipment can be ensured.
Owner:QINGDAO PORT GRP

Reciprocating dynamic cycling bike

PendingCN110975225ARegulate flow rateRegulating valve to adjust the flow rateMovement coordination devicesCardiovascular exercising devicesHydraulic cylinderDrive wheel
The invention discloses a reciprocating dynamic cycling bike. The reciprocating dynamic cycling bike includes a base, a frame is fixed above the base, a bike head is installed on the front portion ofthe frame, a cushion is mounted in middle of the frame, driving wheels are arranged at the lower part of the frame, the driving wheels is connected with the frame through a rotating shaft, the two ends of the rotating shaft are connected with cranks, pedals are connected to the cranks, a hydraulic damper is further arranged on the base, the hydraulic damper comprises two hydraulic cylinders whichare arranged in a bilateral symmetry mode, the hydraulic cylinders are hinged to the base, a connecting rod is hinged to a piston rod of each hydraulic cylinder, the connecting rod is connected to thecrank in the corresponding direction in a sleeving mode, a flow regulating valve is arranged between the two hydraulic cylinders, the flow regulating valve is arranged on a mounting box, the mountingbox is connected with the base, and the left and right ends of the flow regulating valve are respectively communicated with a liquid in the hydraulic cylinder through hoses. The hydraulic cylinder isadopted to replace a traditional inertia flywheel to serve as a damper of the dynamic cycling bike, damping directly acts on the pedals, so that the transmission efficiency is high.
Owner:LIUZHOU VOCATIONAL & TECHN COLLEGE

Cage stranding machine wire-stranding apparatus with protection mechanisms

The invention belongs to the technical field of a cage stranding machine wire-stranding apparatus, and discloses a cage stranding machine wire-stranding apparatus with protection mechanisms. The cage stranding machine wire-stranding apparatus comprises a main shaft and a winch; the winch is arranged on the outer wall of the main shaft in a sleeving manner; the main shaft is also sleeved with a driving gear; the winch is also provided with un-twisting gears connected with an un-twisting apparatus; un-twisting transmission gears are arranged between the driving gear and the un-twisting gears; the protection mechanisms are arranged on the edges of the left and right side walls of the winch respectively; the protection mechanisms are mounted on a fixed frame; each protection mechanism comprises a protection shell; the inner wall of the protection shell is movably connected with two groups of semi-gears through a rotary shaft; an iron rod with a gear is meshed between the two groups of semi-gears; and the iron rod is sleeved with a limiting ring. By adoption of the cage stranding machine wire-stranding apparatus, the un-twisting apparatus can operate stably and smoothly, noise is lowered, and yield is improved consequently; and in power failure or equipment fault conditions, the protection apparatus can brake in time so as to avoid wire core scattering on the winch.
Owner:CHAOHU JINYE ELECTRIC MACHINERY

Safety gear with easy control of synchronism

The invention relates to a safety gear with easy control of synchronism. The safety gear comprises two car bottom framework steel channels and a middle beam, wherein the middle beam is positioned between the two car bottom framework steel channels, the middle parts of the outer walls of the two car bottom framework steel channels are respectively provided with a lifting assembly and a safety gear assembly, each lifting assembly comprises a lifting rod and a fixing plate, each fixing plate is used for further fixing the corresponding lifting rod and the corresponding car bottom framework steel channel, the two lifting assemblies are connected by a transverse rod and the middle beam in parallel, the two ends of the transverse rod are connected with two sleeve tubes, the inner diameter of each sleeve tube is the same with the outer diameter of the transverse rod, the two ends of the transverse rod are screwed into the sleeve tubes, the connecting part of the transverse rod and the corresponding sleeve tube is fixed by a first positioning pin, and the other ends of the two sleeve tubes are fixedly arranged on the lifting rods at the two sides. The safety gear has the advantages that the synchronism is guaranteed in the manufacturing process, the subsequent inspection and adjusting process is not needed, the time and labor are saved, and the large-scale production of enterprises is convenient.
Owner:JIANGSU CHUANGLI ELEVATOR PARTS

Automatic blanking machine pay-off disc of mining anchor cable

InactiveCN108817128AAvoid cutting inaccurate lengthsAvoid bendingEngineeringRotating disc
The invention relates to an automatic blanking machine pay-off disc of a mining anchor cable, and belongs to the technical field of coal mine machinery. The automatic blanking machine pay-off disc ofthe mining anchor cable is characterized in that when an anchor cable blanking operation is carried out, the bundled anchor cables are placed on a rotating disk above a sliding base, a middle shaft penetrates through the center of the anchor cable bundle, after the anchor cable bundle is placed on the sliding base, the sliding base moves downwards under the action of gravity; a spring seat compresses a reset spring, when the sliding base moves downwards, the spring seat pushes connecting rods through hinge mechanisms, and the connecting rods push sliding blocks to move towards the outer side in sliding grooves; and the anchor cable bundle is tightly pressed by baffles under the action of springs, after blanking of the anchor cable is finished, the gravity of the sliding base disappears, and the reset spring drives the sliding base to move upwards. According to the automatic blanking machine pay-off disc, the rotating disc is arranged on the sliding base, the anchor cable bundle placedon the sliding base can be freely rotated through the rotating disc, the blanking speed is increased, meanwhile, double-brake can timely brake the anchor cable bundle, and the accuracy of blanking andcutting of the anchor cable is effectively improved.
Owner:FOSHAN LINGXIE ENVIRONMENTAL PROTECTION TECH CO LTD

Deviation correcting device for bag making machine

The invention discloses a deviation correcting device for a bag making machine. The deviation correcting device is characterized by comprising an electric circuit, on-off keys, adjustment keys, an operation panel, a display screen, a power line, deviation correcting devices, a manual wheels, a baffle, a heater, a motor, footings, an electric control box, brackets, and a workbench; the electric circuit is connected with the on-off keys, and each of the deviation correcting devices is composed of an inductor, a deviation correcting controller, a stepping motor, a tension controller, a screw, a base, a rack, a supercharger, and a magnetic powder brake; and the inductor is connected with the deviation correcting controller through the power line, the deviation correcting controller is connected with the stepping motor, the tension controller is connected with the screw, the supercharger is connected with a magnetic powder brake, and the workbench is connected with the electric circuit. Thedeviation correcting device for bag making machine is provided with the deviation correcting devices, so that the pressure is increased so that the magnetic powder brake can be braked in time, the original track is maintained, and the deviation correcting reaction and accuracy are improved.
Owner:天津威朗达睿科技发展有限公司

Brake device of electric cleaning and checking vehicle and control method

The invention discloses a brake device of an electric cleaning and checking vehicle and a control method. The brake device comprises a wheel and a mounting block, wherein the mounting block is horizontally arranged above the wheel, brake pads are fixedly sleeved on two sides of the wheel, a cavity is arranged in the mounting block, a processor and an alarm are sequentially arranged in the cavity,the output end of the processor is electrically connected with the input end of the alarm, a vehicle speed sensor is arranged on one side, close to the wheel, of the mounting block. the output end ofthe vehicle speed sensor is connected with the input end of the processor, the bottom of the mounting block is provided with a double-shaft oil cylinder, the double-shaft oil cylinder and the outer wall of the mounting block are fixedly connected through a fixing rod, and the output end of the processor is electrically connected with the input end of the double-shaft oil cylinder. According to thebrake device of the electric cleaning and checking vehicle and the control method, through the arrangement of the vehicle speed sensor and the processor, an automatic control mechanism is arranged inthe device, so that the braking of the vehicle can be automatically reflected and controlled during emergency braking, thereby ensuring the timely braking of the vehicle.
Owner:广州朗晴电动车有限公司

Braking device for wind driven generator

The invention discloses a braking device for a wind driven generator, and relates to the technical field of wind driven generators. The braking device comprises a cabin body, wherein a low-speed shaftpenetrates through one side of the cabin body; an impeller is arranged at one end of the low-speed shaft, and the impeller is arranged outside the cabin body; a transmission is arranged at the otherend of the low-speed shaft; a fixed block is arranged at the bottom of the transmission, and the bottom of the fixed block is fixedly connected with the bottom of an inner cavity of the cabin body; ahigh-speed shaft is arranged on one side of the transmission, and a generator is arranged at one end of the high-speed shaft; the low-speed shaft and the high-speed shaft are both sleeved with a brakedisc; and a motor is arranged on one side of the bottom of the inner cavity of the cabin body, and a rotating shaft is arranged at one end of an output shaft of the motor. According to the brake device for the wind power generator, brake pads can be conveniently arranged on placing discs, the brake pads are convenient to assemble and disassemble, the braking effect of the wind driven generator isimproved, the service lives of the high-speed shaft and the low-speed shaft are prolonged, the maintenance and replacement frequency of the high-speed shaft and the low-speed shaft is reduced, and the working efficiency of the wind driven generator is indirectly improved.
Owner:泰州市扬帆车件有限公司
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