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53results about How to "Increased idle time" patented technology

Impeller optimized design method capable of prolonging running down time of reactor coolant pump

InactiveCN106015082AImprove Nuclear Safety PerformanceIncreased idle timeGeometric CADPump componentsImpellerProcess engineering
The invention relates to an impeller optimized design method capable of prolonging running down time of a reactor coolant pump. According to the impeller optimized design method, firstly, a main objective function for improving running efficiency under a running down working condition by optimizing main parameters of an impeller is established; then the main parameters are divided into three groups which are taken as design variables respectively, three subordinate objective functions are optimized respectively with a complex method for running down efficiency under initial constraint conditions, and the optimum points, guaranteeing the highest efficiency, of main geometric parameters of the impeller are obtained respectively; and a new constraint is determined in a small range nearby the optimum points, optimized solution is performed on the main objective function under the reduced new constraint with a feasible direction method, and the final optimized result is obtained. By means of design of the impeller of the reactor coolant pump, the problem of lower running down efficiency of the impeller can be improved, the running down time is prolonged, and the nuclear safety is improved. Meanwhile, with innovative application of the step-by-step optimization design method adopting constraint range reduction for subordinate objectives and optimum point searching for the main objective, the optimization speed is increased, and the effectiveness of the optimized result is guaranteed.
Owner:JIANGSU UNIV

Main pump electromagnetic flywheel of PWR (Pressurized Water Reactor) nuclear power station

The invention discloses a main pump electromagnetic flywheel of a PWR (Pressurized Water Reactor) nuclear power station, aiming to provide a main pump electromagnetic flywheel of the PWR nuclear power station, substituting the coupling of an electromagnetic field for the mechanical connection between a flywheel and a main pump shafting, greatly improving the main pump running down time by separating a main pump shaft from a flywheel shaft, lowering the manufacture requirements on the main pump shafting, reducing the vibration energy of the main pump shafting, shortening the start time of a main pump and lessening the influence of the main pump start process on peripheral equipment. The main pump electromagnetic flywheel of the PWR nuclear power station comprises a mechanical flywheel, a synchronous motor, a DC start motor, a start control unit and a synchronous control unit, wherein the mechanical flywheel and the synchronous motor are mechanically connected with the rotating shaft ofthe DC start motor, the synchronous motor is connected in parallel with the main pump motor through a switch and a lead, the DC start motor is controlled by the start control unit, the electromagnetic flywheel is started by the DC motor, the synchronous motor keeps synchronous rotation, and the mechanical flywheel, the synchronous motor and the main pump motor jointly provide the main pump with running down energy. The invention is suitable for all PWR nuclear power stations.
Owner:WEIHAI CREDITFAN VENTILATOR

Guide vane optimized design method capable of prolonging running down time of reactor coolant pump

InactiveCN106015102AIncreased idle timeImprove Nuclear Safety PerformancePump componentsPumpsProcess engineeringEngineering
The invention relates to a guide vane optimized design method capable of prolonging running down time of a reactor coolant pump. According to the guide vane optimized design method, firstly, a main objective function for improving running efficiency under running down by optimizing main parameters of a radial guide vane is established; then the main parameters are divided into three groups of subordinate design variables, subordinate objective functions are optimized respectively with running down efficiency, optimized solution is performed under initial constraint conditions, and the optimum points of the performance of the parameters are obtained; and the optimum points serve as centers for determination of new constraint conditions, optimized solution is performed on the main objective function under the new constraint conditions, and the final optimized result is obtained. By means of the design of the radial guide vane of the reactor coolant pump, the problems of lower efficiency and production of secondary backflow in a running down process can be improved, the running down time is prolonged, sufficient flow passes through to cool a reactor core, and the nuclear safety is enhanced. With application of step-by-step optimization design method adopting a subordinate objective constraint random direction searching method for reduction of a constraint range and a main objective exterior penalty function method for search of the optimum points, the effectiveness of the optimized result is guaranteed, and the optimization speed is increased.
Owner:JIANGSU UNIV

Bidirectional intelligent automobile clutch driven disc with composite sleeve core

ActiveCN105257724AOvercome technical shortcomingsReduce usageFriction clutchesLathe faceplateThrust bearing
A bidirectional intelligent automobile clutch driven disc with a composite sleeve core comprises a rotating shell made of bearing steel and a force transmission frame formed by punching an alloy steel plate. The spline face of the rotating shell is connected with a spline hole of the force transmission frame. The diameter of each auxiliary spring steel wire is larger than the diameter of each main spring steel wire. Each auxiliary spring is mounted in an inner hole of a corresponding main spring, and locating core columns are mounted in holes of the auxiliary springs. The two ends of each locating core column are riveted to the edges of a corresponding fan-shaped hole of the force transmission frame. The main springs are placed in clamping grooves of a right disc chuck and a left disc chuck. A cavity core is arranged in the rotating shell and an inner cavity of a rotating shell cover, and the surface of the cavity core is provided with multiple sections of reducing curved surfaces. Two pairs of thrust bearings are composed of ball grooves of the rotating shell, ball grooves of the rotating shell cover, ball grooves in the two end faces of the cavity core, a plurality of ceramic balls and separation columns with the same number with the ceramic balls, and the metal separation columns are hollow cylinders and are filled with lubricating grease. The right disc chuck and the left disc chuck are connected through pins. According to the bidirectional intelligent automobile clutch driven disc, gear shifting operation is simplified, when an automobile goes down a slope, good braking performance is achieved, and the service life of an engine and the service life of a gearbox can be prolonged.
Owner:帅晓华

Self-adaptive integrated sewage treatment system and adjusting method

The invention provides a self-adaptive integrated sewage treatment system and an adjusting method, and relates to the field of sewage treatment. The system comprises a reaction tank and an adjusting tank, and further comprises a flow control device, a stirring device, an aeration device, a liquid discharge device, a liquid level monitoring device, a water quality monitoring device and a control device electrically connected with the devices. The flow control device, the liquid level monitoring device and the water quality monitoring device transmit water quantity, liquid level height and water quality signals to the control device, and the control device controls the speed and time of the stirring device and the ventilation capacity and time of the aeration device. The water quality monitoring device transmits signals to the control device after monitoring that the water quality reaches the standard, and the control device controls the liquid discharge device to discharge up-to-standard sewage, so that self-adaptive integrated sewage treatment is realized. The adjusting method comprises a water quantity and water quality self-adaptive adjusting method. The problem that treated sewage does not reach the standard due to the fact that existing rural sewage treatment equipment is poor in adaptability to water quantity and water quality changes is solved.
Owner:重庆阁林环保科技有限公司 +1
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