32results about How to "Prevent flying car" patented technology

The invention provides a method for preventing a wind generating set from runaway. After a fan master control system sends a variable pitch instruction for certain time, a pitch control system cannot be tracked in real time and is considered as failure when the rotating speed of a wind wheel exceeds a given value. According to the method, under the condition that the pitch control system of the fan fails, the fan is controlled to yaw for 90-degree crosswind, accordingly, the wind energy absorption of the wind wheel is maximum, the rotating speed of the wind wheel is rapidly reduced, and the fan can be protected from being damaged to the greatest extend after failure of variable pitch of the fan.

The invention discloses an anti-runaway protection system and method for a downward belt conveyor. The protection system comprises a damping device, a hydraulic execution subsystem and a control subsystem, wherein the damping device is used for braking running of the belt conveyor mounted on a downward inclined surface in parallel; the hydraulic execution subsystem is used for driving the damping device to move; the control subsystem is used for detecting and controlling the running state of the belt conveyor in real time; and the system is convenient to mount and operate. The protection method comprises steps as follows: 1, working condition information of the belt conveyor is acquired in real time, and the acquired information is stored and uploaded synchronously; 2, the revolving speed of a motor of the belt conveyor is analyzed and processed; 3, whether a power supply module of a power grid is powered off or not is judged; 4, the belt conveyor is controlled to brake and slow down intermittently; 5, the belt conveyor is controlled to shut down. The system is novel in design, the runaway phenomena of the belt conveyor can be detected and controlled, the belt conveyor can be protected to shut down stably under the condition of the power failure, the condition of runaway of the belt conveyor due to the dead weight of materials during the power failure can be avoided, and the use effect is good.

A brake machine for a belt conveyor in a coal mine roadway comprises a machine frame, the top of the machine frame is provided with a top beam in the front-and-back horizontal direction, a plurality of jacks or oil cylinders are arranged below the top beam, the axes of the jacks or the oil cylinders are located in the vertical direction, a base of each jack or a base of a cylinder body of each oil cylinder is hinged to the lower end of a beam in a connected mode, each jack or a piston rod of each oil cylinder is fixedly connected with the top end of an upper belt clamping plate, and an upper soft cushion is fixed at the bottom end of the upper belt clamping plate. A lower belt clamping plate is arranged below the upper belt clamping plate, the plane of the lower belt clamping plate is located in the horizontal direction, a lower soft cushion is fixed at the top end of the lower belt clamping plate, the lower belt clamping plate is fixed on the top of a bottom beam, and the bottom beam is fixed on the machine frame. The brake machine for the belt conveyor in the coal mine roadway has the advantages that the belt conveyor can be fast braked before belt flying or during the belt flying process, the serious fault of the belt conveyor can be avoided, and the normal operation of coal mine production can be ensured.

The invention provides an electric vehicle controller with an automatic transmission function and a voice speaker device. A single chip microcomputer circuit with an automatic transmission function program, a drive circuit, a Hall sensing signal input wiring terminal, a back electromotive force collecting and processing circuit, a speed regulating signal input wiring terminal, a brake signal input wiring terminal and a gear signal input wiring terminal are arranged on a controller electronic circuit board. The single chip microcomputer circuit with the automatic transmission function program is used for detecting the signals fed back or output by the above function circuits to identify the difficulty and the demand for increasing power of abrupt slope climbing under the different speed conditions of vehicle pushing and riding or overload traveling or acceleration starting or overtaking, and a large-power gear is switched in an automatic transmission mode. After an abrupt slope is crossed, or overloads are released, or acceleration starting is conducted, or braking is conducted during overtaking gear traveling, an economic gear is switched in an automatic transmission mode. When a breakdown happens to an electric vehicle circuit, a low-speed gear is switched in an automatic transmission mode to continue safe traveling. The voice speaker device is matched with the controller in use for voice prompt.

The invention discloses a transmission of a mandrel thrust trolley of a perforating machine, relating to steel rolling machinery. By means of the invention, the potential security hazard of the mandrel thrust trolley of the perforating machine can be solved. The transmission disclosed by the invention comprises a power system, a gear and gear rack mechanism and a mandrel trolley. The power system is composed of a motor, a coupling with a brake disc, a decelerator and a coupling. A small gear and a long gear rack are meshed so as to form the gear and gear rack mechanism. The mandrel trolley is connected with the long gear rack. The output shaft of the decelerator is connected with the small gear through the coupling. Wherein the tooth surface of the long gear rack is upward; the lower part of the long gear rack is provided with a full-length sliding plate; the sliding plate is positioned above a roller way and is capable of sliding along the roller way; the roller way is composed of a plurality of rollers; each roller is fixed on a roller way base through a bearing base; and the tail part of the long gear rack is supported on two guide rails of the roller way base through an idler wheel. The transmission disclosed by the invention is used for the perforating machine in the seamless steel tube production. Unsafe hidden troubles are eliminated. The transmission has the advantages of low moving inertia, steady operation, non-deformed gear rack and the like.

The invention discloses a wind turbine generator set overspeed protection auxiliary control method including torque control, and the method specifically comprises the steps: judging whether the rotating speed of a wind turbine generator set in the operation process is in a normal range or not, and starting an overspeed protection auxiliary control mode if the rotating speed is not in the normal range; and reducing the rotating speed of the wind turbine generator set in a mode of combining a normal shutdown mode, a torque control mode and an emergency yaw mode. As redundancy protection, multiple protections can be provided for overspeed faults of the wind turbine generator set, so that the operation safety risk of the wind turbine generator set is reduced, and serious accidents such as galloping and tower falling of the wind turbine generator set are prevented.

The invention provides a glass recycling system. The recycling system comprises a detection device, a drying device, a dust removal device, a crushing device, an adjusting device, a screening device and a processor, wherein the detection device is configured to detect the shape of a glass product; the drying device is configured to dry the glass product and cooperate with the dust removal device to clean impurities adsorbed in the glass product; the crushing device is configured to crush the glass product; the strength of the crushing device is adjusted through the adjusting device; and the screening device is configured to detect glass fragments and perform secondary treatment on the fragments. The adjusting device is configured to be arranged on a rotating barrel of the crushing device and crush the glass product, so that the adjusting device can perform adjustment according to data acquired by the detection device, the crushing device can efficiently crush the glass product in the crushing process, and the crushing effect is optimal.

Embodiments of the invention disclose a waste heat utilization generator set and a galloping prevention device and method thereof. The galloping prevention device of the generator set comprises a converter and a brake loop, wherein the converter comprises an alarm branch; the generator set is electrically connected to an energy consumption resistor through the converter; the converter controls thedisconnection between the generator set and the energy consumption resistor when the output voltage of the generator set exceeds the threshold voltage, and controls the alarm branch to be powered onat the same time; the generator set is electrically connected to the energy consumption resistor through the brake loop; the brake loop is connected to the alarm branch in parallel; and the brake loopcontrols the connection between the generator set and the energy consumption resistor according to the electrification of the alarm branch. During the process of closing an air inlet valve of an expander and opening an exhaust valve of the expander, the generator set is kept connected to the energy consumption resistor, the energy consumption resistor serves as a brake resistor to release the rotating speed of the generator set, and galloping of the generator set in the process of closing the air inlet valve of the expander and opening the exhaust valve of the expander is effectively prevented.

The invention discloses a permanent magnet synchronous motor. The motor comprises a rotating shaft, an end cover, a base and a rear cover, the two ends of the base are detachably connected with an endcover and a rear cover correspondingly. The rotating shaft is inserted into the base; the transmission output end of the rotating shaft protrudes out of the end cover; a winding stator, a permanent magnet and a rotor iron core are installed in the base. According to the permanent magnet synchronous motor, the motor is light in weight, high in release efficiency, good in motor stability and heat dissipation performance and large in starting torque, electric energy can be generated spontaneously under the condition of no external force energy, certain energy recovery is guaranteed, and therefore the effective endurance mileage is increased. On the basis of a traditional motor, one battery pack is reduced, the same continuous mileage is achieved, after matching of the motor and the controller is completed, the cost of the whole vehicle is reduced, and the performance of the whole vehicle is improved.

A downward transport belt conveyor energy-saving braking system which comprises a low-power electromotor, a worm and gear speed reducer, a belt driving roller and a braking device, wherein a motor shaft is connected with a worm of the worm and gear speed reducer, and a driving roll is connected with a worm wheel of the worm and gear speed reducer; a pulling stress sensor is arranged in the axial direction of the worm, the system further comprise a control module, and the control module is respectively connected with the pulling stress sensor and the braking device. According to the downward transport belt conveyor energy-saving braking system, combination of the low-power electromotor, the worm and gear speed reducer and the pulling stress sensor is adopted, low-speed starting and low-speed operating of a downward transport belt can be achieved, and galloping effects are avoided.