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198results about How to "Avoid shock" patented technology

Method for controlling locking clutch of hydraulic torque converter under situation that accelerator is emergently released

ActiveCN106246762AAvoid shockPrevents overadjustment or increased latch-up process timeClutchesGearing controlDriver/operatorOil pressure
The invention relates to a method for controlling a locking clutch of a hydraulic torque converter under the situation that an accelerator is emergently released. When a car runs by normally stepping on the accelerator, the turbine rotation speed of the hydraulic torque converter is smaller than the pump impeller rotation speed, and it is detected that a driver suddenly releases the accelerator at the time point T3 in the locking clutch oil pressure increasing stage after oil pressure of the locking clutch is built, all situations are set up, and all stages of control operates are completed in sequence, specifically, in the first stage, the control oil pressure value of the locking clutch drops from the oil pressure value A of the time point T3 to the oil pressure B of the half engagement point of the locking clutch, in the process, the pump impeller rotation speed is decreased slowly under the action of the suddenly decreased engine torque, dropping of the control oil pressure of the locking clutch can buffer the effect of clutch locking acceleration caused by sudden release of the accelerator, and impact caused by rapid engagement of the clutch is avoided; the second stage and the third stage have the effect of completely limiting the pump impeller rotation speed in a timely response mode so that the pump impeller rotation speed can be prevented from being excessively adjusted or duration of the locking process can be prevented from being prolonged.
Owner:SHENGRUI TRANSMISSION

Water purifying technology for large-scale floating plant cultivation project of lake river mouth surface

InactiveCN101153484AAvoid shockAchieve isolationWater cleaningRiver pollutionStorm
The invention discloses a maturity process and a packaged technology for purifying water in a lake-river-mouth on-scale floating plant cultivation project. The main body comprises an outside protective cloth water barricading, a floating blanket type wave absorption zone, a floating plant purification area, an inboard water distribution barricading, an aeration deodorization reoxygenation zone and a submerged plant purification area. By the outside protected water distribution barricading and the floating blanket type wave absorption zone, boundaries of a project area are controlled, the water flow exchange between the water body in the project area and the lake surface is obstructed and storms is resisted; by the outside protected water distribution barricading and the inboard water distribution barricading, the inflow and outflow of the water of the project area are controlled, thereby even water distribution and uniform water power residence time are achieved; the main process unit for water purification is formed through cultivating floating plants on scale on large cage carriers with the biserial emplacement and the elastic mooring at the bottom of the lake; through deodorization and reoxygenation in the aeration zone, and oxygenation and purification in the submerged plant purification area, the odor in the water is eliminated and the water is resumed to the oxygenation state, the effects of the floating plant purification area to the downstream water body and surrounding environment are eliminated. The maturity process and the packaged technology can be used to control the related pollution among water bodies including rivers flowing into lakes pollution control, water flow flowing out of lakes pollution control, water purification of lake coastwise sewage discharge points, water purification of lake coastwise intake points (water resources area) and others, and have the remarkable efficacies of eliminating alga, nitrogen, phosphorus.
Owner:NANJING INST OF GEOGRAPHY & LIMNOLOGY

Output differential feedback based adaptive control method of virtual synchronizer

ActiveCN108418256AAvoid repeated charging and discharging processAvoid shockSingle network parallel feeding arrangementsAc network voltage adjustmentVirtual synchronyVoltage amplitude
The invention discloses an output differential feedback based adaptive control method of a virtual synchronizer. The method comprises the steps that 1) an output current, an output voltage and a power-grid voltage of a three-phase full-bridge inverter are collected and converted into digital quantities respectively; 2) excitation of the virtual synchronizer is output via reactive voltage regulation control, and an output voltage amplitude and a power-grid voltage amplitude are calculated; 3) active power, reactive power and excitation electromotive force of the system are calculated; 4) speedfeedback control is realized, and an initial value of a speed feedback coefficient is calculated; 5) active frequency modulation control is realized, virtual synchronizing angular velocity and phase are output, and a rotating speed difference and an angular acceleration of the virtual synchronizer are calculated; 6) adaptive regulation rules of the virtual inertia moment and speed feedback coefficient are set; 7) CLARK transformation is carried out to obtain a voltage quantity in an alpha-beta static coordinate system; and 8) spatial vector modulation is carried out to obtain six paths of control switch pulses of the three-phase full-bridge inverter, and thus, three-phase AC feedback power grid is realized.
Owner:XIAN UNIV OF TECH

Supervoltage magnetic-controlled shunt reactor excitation equipment

The invention relates to an extra high pressure magnetron type shunt reactor excitation device, including a power system, a rectification system, a monitor system and an overvoltage protection system, wherein the power system is powered by a double-transformer; the rectification system includes two sets of independent sub-rectification systems connected with the power system through a diverter switch; the output end is provided with an output isolating switch and the two sub-rectification systems are respectively connected with the monitor system including a main monitor system with two parallel sub-monitor systems; the output signals on the output end of the rectification system are respectively input into the two sub-monitor systems, while the data of the overvoltage protection system are input into the main monitor system; the overvoltage protection system is arranged on the output end of the rectification system, with one end connected with the output bus of the rectification system, and the other end grounded. The invention adopts the double structure configuration, advances the reliability of the device, avoids the decommissioning of the shunt reactor and the whole circuit caused by the failure of part device of the excitation device, which is convenient to overhaul and maintain.
Owner:CHINA ELECTRIC POWER RES INST +1

Expressway tunnel fire rescue device

PendingCN109499033AAvoid shockStrong shockAircraft componentsFire rescueWater pipeFire detection
The invention discloses an expressway tunnel fire rescue device. The expressway tunnel fire rescue device comprises a guide rail, a power supply rod, a flying fire fighting vehicle, a fire fighting trolley, a water pipe, a three-way pipe, a water valve, fire detection devices, a control system and a display device. The water pipe is installed in a tunnel to serve as a fire fighting water source ofthe tunnel. When the fire fighting trolley enters the tunnel where a fire happens, firefighters guide the water in the water pipe into the fire fighting trolley, and the fire fighting trolley moves forwards to find out the position of a fire source, rapidly pumps out the water in the water pipe and sprays the water to the fire source. The display device is adopted to remind drivers located outside the tunnel not to enter the tunnel where the fire happens, and therefore the phenomenon that the rear-end collision happens due to the fact that vehicles located outside the tunnel enter the tunnelblindly, or the unnecessary trouble is caused due to the fact that the vehicles run to the fire source is avoided. The flying fire fighting vehicle flies above a green belt, the medical personnel, thefirefighters and the fire fighting trolley are rapidly sent to the position where the fire happens, and therefore the victim rescue time is greatly saved.
Owner:胡军

Photovoltaic grid-connected inverter with stored energy management and load-power-based output functions

The invention discloses a photovoltaic grid-connected inverter with stored energy management and load-power-based output functions. The photovoltaic grid-connected inverter is characterized by comprising a solar array, a maximum power point tracking (MPPT) module, a power control module, a charging/discharging management module, an energy storage device, an inversion grid-connection module and a load monitoring module, wherein the MPPT module acquires the electric energy of the solar array through an MPPT algorithm; and the load monitoring module detects power parameters and the total current of load operation. The invention has the advantages that 1, according to the photovoltaic grid-connected inverter, the MPPT module is used for acquiring the generated energy of the solar array, and solar energy can be utilized to the greatest extent for power generation; 2, the load monitoring module is used for detecting the power parameters and the total current of the load operation, so impact on a power grid is avoided, and the energy storage device is managed; and 3, in a mode of connecting the grid-connected inverter and the power grid, the capacity of the energy storage device is effectively reduced, the utilization efficiency of the electric energy is improved, and load power is not limited by inverter power.
Owner:江苏辉伦太阳能科技有限公司

Supporting pressure closed-loop control system and method for hydraulic forging press

ActiveCN105458141AStable support pressureAvoid shockForging press drivesPid control algorithmLoop control
The invention discloses a supporting pressure closed-loop control system and method for a hydraulic forging press. The supporting pressure closed-loop control system comprises a pressure sensor, a programmable logic controller and a proportional servo valve. The pressure sensor is used for collecting a sliding block supporting pressure datum in a sliding block oil cylinder lower cavity. The programmable logic controller compares the input oil cylinder pressure datum with a set supporting pressure datum and outputs a control instruction through a modified proportion integration differentiation (PID) control algorithm. The proportional servo valve is used for receiving the control instruction to achieve control over the supporting pressure of the sliding block lower cavity of the hydraulic forging press. An input port of the programmable logic controller is in electric connection with the pressure sensor. An output port of the programmable logic controller is in electric connection with an input terminal of the proportional servo valve. According to the supporting pressure closed-loop control system and method, the modified PID control algorithm is led into the pressure closed-loop control system of forging, so that the stability of the sliding block supporting pressure of the hydraulic forging press at different tonnage and working speed is improved.
Owner:TIANJIN TIANDUAN PRESS CO LTD

Automatic locking method for battery replacement station of flexible direct-current transmission system

ActiveCN104092232AShorten the lock-up processAvoid shockElectric power transfer ac networkTransmission systemControl pattern
The invention discloses an automatic locking method for a battery replacement station of a flexible direct-current transmission system. The automatic locking method includes the steps of firstly, judging the control mode of the station, the running state of the station and the running states of other stations; secondly, judging the current running state when the flexible direct-current system runs if the station is judged to have the direct-current voltage control mode, the station is in the unlocked state and meanwhile other stations are all in the locked state; thirdly, starting the locking process of the station according to a received system locking control instruction if all the conditions are met, and conducting reactive power reduction control; fourthly, sending a window signal to complete the locking process if the reactive power of the convertor station is zero at present. By means of the automatic locking method, a control and protection system is automatically locked, the locking process of the flexible direct-current transmission system is shortened, impact which is caused by control and protection system incorrect operation generated due to man-made incorrect operation and the like to an alternating-current system is effectively avoided, time consumption of the whole locking process of the flexible direct-current system is lowered, and the complexity in the locking process is lowered.
Owner:STATE GRID CORP OF CHINA +2

Multi-station fixing device used for medium-scale electromechanical device transportation

The invention discloses a multi-station fixing device used for medium-scale electromechanical device transportation. For the problem that it is not easy to solve electromechanical device shaking, thefollowing scheme is put forward. The multi-station fixing device comprises a box body. Multiple buffer shock absorption mechanisms are arranged on the inner wall of the bottom of the box body. The topouter walls of the buffer shock absorption mechanisms are fixedly connected with a supporting plate. A fixed frame is fixed to the outer wall of one side of the box body through bolts. A storage battery is connected to the bottom inner wall of the fixed frame in a clamping manner. Two motor frames are fixed to the position, close to the top, of the outer wall of one side of the box body through bolts. The two motor frames are located above the fixed frame. A motor is fixed to the inner wall of one side of each motor frame through bolts. One end of an output shaft of each motor is connected with a transmission shaft. According to the multi-station fixing device, a gas pump is started to make vacuum pads tightly attached to the surface of an electromechanical device to conduct fixation, then a vertical plate is squeezed on the other side of the electromechanical device to conduct pressurization and fixation, and a rubber pad and a soft pad are further arranged on the two sides to sufficiently protect the electromechanical device.
Owner:大连赢得科技有限公司

Method for controlling direct-current (DC) frequency conversion air condition compressor

The invention discloses a method for controlling a direct-current (DC) frequency conversion air condition compressor. The method comprises two position estimation methods, namely a position estimation method A and a position estimation method B. The two position estimation methods are used and changed over as follows: in the process of starting and accelerating of the compressor, the position estimation method A is adopted when the compressor starts, after being started, the compressor starts to accelerate, when the revolving speed of the compressor is less than and equal to V1, the position estimation method A is still adopted, and when the revolving speed of the compressor is greater than V1, the position estimation method B is adopted; after the compressor runs at an intermediate speed or a high speed for a period of time, demands for system cooling or heating are reduced, at the moment, the compressor starts to speed down, in the process of speeding up, the revolving speed of the compressor is greater than and equal to V2, the position estimation method B is adopted, and when the revolving speed of the compressor is less than V2, the position estimation method A is adopted, wherein V1 is greater than and equal to 360 rpm (revolutions per minute), and less than and equal to 1200 rpm, and V2 is greater than and equal to 180 rpm, and less than and equal to 600 rpm. The DC frequency conversion air condition compressor has the characteristics of flexibility in operation and good comfort.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD

Automobile engine and engine warming control method and device of same

The invention discloses an automobile warming control method of an automobile engine, wherein the engine comprises an EGR valve and an EGR cooler, and the EGR valve is located between the EGR cooler and a vent pipe of the engine. The method comprises the steps that engine warming calibration values corresponding to each parameter which respectively stand for an engine working condition, an engine state and an environment state are stored; each of the current parameters which respectively stand for the engine working condition, the engine state and the environment state under a current state is obtained; a precondition of engine warning is that each of the current parameters is less than the corresponding engine warming calibration values, and an opening degree of the EGR valve is adjusted according to the current engine working condition in order to realize the engine warming; and the engine warming is completed when a current engine temperature exceeds a preset engine temperature. The method realizes the quick engine warming by an EGR system installed in the engine and will not influence parts and normal work of the engine during the engine warming. The invention also discloses an automobile warming control device of the automobile engine and the automobile engine with the device.
Owner:WEICHAI POWER CO LTD

Wire spacer for preventing wind-induced vibration of high-voltage power transmission line

InactiveCN102170101AAvoid shockReduce frequencyMaintaining distance between parallel conductorsDevices for damping mechanical oscillationsEngineeringWind speed
The invention discloses a wire spacer for preventing wind-induced vibration of a high-voltage power transmission line. The wind spacer comprises a frame and a plurality of cable clamps evenly distributed on the circumference of the frame, wherein the cable clamps consist of wire blocking claws, vibration damping rods and socket sleeves; each vibration damping rod consists of a step shaft, two springs respectively sleeved at two ends of the step shaft and a spring sleeve; the front section and the rear section of the step shaft are different in length; one end of the sleeve is a tightening hole, the sleeve is sleeved on the long shaft rod and is in clearance fit with the long shaft rod, the other end of the sleeve is fixedly connected with the socket sleeve; the long shaft rod end of the step shaft is connected with the handle part of the wire blocking claw; the short shaft rod end of the step shaft has a section of axial movement clearance in the sleeve; the tail end of the socket sleeve is hinged with the edge of the frame. The wind spacer can resist high wind in different directions, prevent wires from vibrating, and also can effectively reduce the vibration frequency and intensity of wires, even if the wind speed reaches about 25m/s.
Owner:HANZHONG QUNFENG MACHINERY MFG

Suspended particle-system solar thermochemical reactor having function of preventing particle from blocking and adhering to optical window

InactiveCN104474993AAvoid leakage of metal oxide particlesAvoid shockSolar heating energySolar heat devicesPhysicsSpray nozzle
The invention discloses a suspended particle-system solar thermochemical reactor having a function of preventing particles from blocking and adhering to an optical window, belongs to the technical field of solar thermochemical conversion, and is used for solving the problems that metal oxide particles of a conventional suspended particle-system solar thermochemical reactor are leaked, block a gas inlet and a gas outlet, and adhere to an optical window. A shell of the reactor and a shell of a thermal collector are arranged from bottom to top, the optical window is arranged on the shell of the thermal collector in a covering mode, the shell of the reactor is internally provided with a thermal-insulation heat-preservation layer, the upper end of the thermal-insulation heat-preservation layer is provided with a through hole, the through hole communicates a thermal collecting chamber and a reaction chamber, and metal oxide particles are filled in the reaction chamber; one end of each gas inlet pipe and one end of each gas outlet pipe are inserted into the reaction chamber, and one end, located in the reaction chamber, of each of the gas inlet pipes and the gas outlet pipes is provided with a gas cap; gas outlet gas cap structures and gas inlet gas cap structures are respectively provided with gas flow outlets and gas flow inlets; window cleaning spray nozzles are inserted into the thermal collecting chamber from the upper end of the side wall of the shell of the thermal collector. The suspended particle-system solar thermochemical reactor is used for solar thermochemical conversion.
Owner:HARBIN INST OF TECH AT WEIHAI
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