30results about How to "Reduce the number of impacts" patented technology

The plate forming process and apparatus belongs to the field of laser processing technology. The present invention has CO2 laser for pre-heating plate, infrared thermometer for measuring and controlling the plate heating temperature, neodymium glass laser for providing powerful short laser pulse to induce the generation of laser shock wave as the forming force source in processing plate and plate deformation measuring feedback device. The present invention is superior to laser thermal stress forming process, which has inferior formed surface quality, and laser shock forming process, which has small deformation amount, and can form plate directly in relatively great deformation amount, relatively high size precision and relatively high surface quality.

The invention discloses a working face transferring end fluid pressure brace, which is characterized by the following: comprising with front brace support and back brace support to front back two braces as one group type; setting the front brace and the back brace as left right asymmetric structure and nearly same; setting the working face side as short chassis and single stud; setting another side as long chassis, multiple stud and four joint rod device; connecting the top beam on the back brace working face side and the chassis through cable or ring chain, draw top beam or draw shift jack to the front brace or transfer machine; adapting the front and back space of the back brace single stud to the width between the rear edge transferring machine head and the coal getting machine roller front end face; setting anchor bar tendon avoiding protection device at the top beam and front back beam. This brace can increase protection strength and stability.

The invention relates to a controlled source of pulse codes. The bottom end of a base connection carriage is connected with a lower pressing plate at the lower one-third position of the carriage, a coil cylinder and a coil are arranged between an upper pressing plate and the lower pressing plate, a fastening screw penetrates through a locating sleeve to be connected with the upper pressing plate and the carriage, a code controller is connected with the coil, an adjustable screw support cylinder is installed in the middle of the upper pressing plate, and an adjustable screw is connected with the adjustable screw support cylinder to form the controlled source. Coding impact orders generated by the controlled source of the pulse codes has ideal paseudo-random characteristics, can notably reduce impact times, improves construction efficiency, and has high seismic prospecting resolution ratio and signal to noise ratio due to the fact that codes stimulate obtained original seismographic records which can be equivalent to macro-energy single-pulse source signals after relevant decoding operation. Mechanical parts of the controlled source can be rapidly disassembled and assembled, and is convenient to carry and construct, applicable to earthquake exploration in cities and mountainous regions and superficial layer projects, simple in structure, convenient to carry and high in stability.

The invention discloses an IGBT (Insulated Gate Bipolar Transistor) protection circuit and protection method in a stepping motor driver, relates to the technical field of motors, and aims to solve the technical problems of low judgment accuracy, short circuit overcurrent fault tolerance time, short IGBT service life and poor reliability in the protection of IGBTs in an existing motor driver. The IGBT protection circuit comprises a control circuit, an overcurrent protection circuit, a current transformer, a grid driver 4, a grid driver 5, IGBTs, grid resistors, grid voltage stabilizing diodes and triodes, wherein the control circuit is connected with the grid drivers and the bases of the triodes; the grid drivers are connected with the grids of the IGBTs through the grid resistors; the collectors of the triodes are connected with the cathodes of the voltage stabilizing diodes; the anodes of the voltage stabilizing diodes are connected with the grids of the IGBTs; the current transformer is connected in series to a motor coil; the output end of the current transformer is connected with the input end of the overcurrent protection circuit; and the output end of the overcurrent protection circuit is connected with the control circuit. Through adoption of the IGBT protection circuit and protection method, the protection times of overcurrent are reduced, and the working efficiencies of the drivers are increased.

The embodiment of the invention discloses a method and device for preventing link switching in networking, network equipment and a storage medium. The method comprises the following steps: when it ismonitored that a first ring port is recovered from a fault state to a normal state, configuring a port overhead value of the first ring port; operating the spanning tree protocol, and determining thatthe path overhead value from the first ring port to the root network bridge is greater than the root path overhead value from the second ring port to the root network bridge according to the port overhead value of the first ring port; configuring the port state of the first ring port to be a blocking state, and configuring the port state of the second ring port to be a forwarding state, wherein when the first ring port is in a fault state, the port state of the first ring port is a blocking state, and the port state of the second ring port is a forwarding state. The embodiments of the presentinvention can prevent back-switching of a forwarding link.

The invention discloses a method for manufacturing small-specification bars by continuously rolling a 200 mm*200 mm large-section square billet. The method comprises the step of heating, specifically,the 200 mm*200 mm large-section square billet is heated to 1100 DEG C and subjected to soaking heat preservation; the step of disengagement rough rolling, specifically, the 200 mm*200 mm large-section square billet subjected to heat preservation is sequentially conveyed to a first rough rolling mill and a second rough rolling mill which are alternatively horizontally and vertically arranged for disengagement rough rolling, and a 165 mm*162 mm square billet is obtained; the step of intermediate finish rolling, specifically, the 165 mm*162 mm square billet enters a third rough rolling mill viaa roller way, and is rolled through six passes of rough rolling mills which are alternatively horizontally and vertically arranged, eight to twelve passes of intermediate rolling mills and eight to twelve passes of finish rolling mills, and thus small-specification bars with the diameter being 16-40 mm are obtained; and the step of shearing and cooling, after rolling is completed, the small-specification bars are subjected to multiple-length sectioning through flying shears as well as cooling, and thus the finished small-specification bars are obtained. The method has the characteristics of high operation rate, stable rolling, low rolling damage and high yield.

The invention provides a design method of a synchronous motion transmission error curve and a spiral bevel gear using the transmission error curve. The synchronous motion transmission error curve of the invention has two tooth changing points, which means that the number of tooth changing impact is small; the slope of adjacent transmission error curves is very close to each other at the point of gear change, which means that the angular velocity of gear change is almost the same. The engaging-in and engaging-out points are close to the inflection point of the transmission error curve, and thesecond derivative is zero, which means that the inertial dynamic load is almost zero when the gear is changed. The synchronous motion of the adjacent transmission error curve between the engaging-in and engaging-out points means that the non-uniform coefficient of load distribution between teeth is minimized. The above characteristics will greatly reduce the load on the teeth and vibration and impact caused by gear change, improve the load distribution between the teeth, and further improve the transmission performance of spiral bevel gears.

The invention discloses an intelligent ash removal control method of a bag type dust removing device. According to the method, an ash removal procedure, dust removing device outlet discharge and overall dust removing device resistance are associated; a pressure difference transmitter is arranged to monitor the pressure difference balance condition of a bag chamber, such that the pressure difference of a bag type dust removing device is stable and small in fluctuation, the times of impacting on the filtering bag by compressed air are reduced, and the service life of the filtering bag is substantially prolonged; and according to the concentration of the dust real-timely collected at the air outlet, the upper and lower limit values of the pressure difference and the interval ash removal timeare adjusted so as to avoid the excessive ash removal action, protect the dust layer on the surface of the filtering bag, reduce the escape of ultrafine dust and the system energy consumption, prolongthe service life of the filtering bag, reduce the emission caused by ash removal to the maximum extent, and achieve the ultralow-concentration dust emission at the outlet.

The invention provides a gray code based cam structure and a driver controller. The cam structure comprises four layers of cam and is characterized in that central through holes of the four layers of cam are coaxial, the outer rim of each layer of cam comprises at least one bulge which is used for pushing a contact of a high-speed speed so as to enable the high-speed switch to be switched on, and the bulges of the first layer of cam are located at arcs corresponding to parts, which are from 22.5 degrees to 67.5 degrees, from 112.5 degrees to 157.5 degrees, from 202.5 degrees to 247.5 degrees, and from 292.5 degrees to 337.5 degrees, of the outer rim; the bulges of the second layer of cam are located at arcs corresponding to parts, which are from 45 degrees to 135 degrees, and from 225 degrees to 315 degrees, of the outer rim; the bulge of the third layer of cam is located at an arc corresponding to a part, which is from 90 degrees to 270 degrees, of the outer rim; the bulge of the fourth layer of cam is located at an arc corresponding to a part, which is from 180 degrees to 360 degrees, of the outer rim; and 0 degree references of the four layers of cam are the same. According to the cam structure and the driver controller provided by the invention, the abrasion of the switch and the cam structure can be reduced effectively, and driving is ensured to be stable and safe.

The invention discloses a damping and damper selection method for reducing wheel tread failures in rail transit. A positive non-linear damper is selected, wherein the change rate of the absolute value of damping force F of the positive non-linear damper to the vibration velocity absolute value V is a constant or a progressive increase coefficient; when a damping object is subjected to positive or negative damping relative to the polarity of the vibration velocity V, the polarity of the generated damping force F is always opposite to the polarity of the vibration velocity V. The damping and damper selection method has the advantages that persistent wheel vibration and persistent wheeltrack impact caused and induced by accidental wheeltrack impact can be reduced effectively, vibration amplitude and impact frequency of wheeltrack resonance can be reduced, and accordingly, wheel damage caused by accidental impact is inhibited effectively; particularly, damage 'duplication' caused by induced continuous impact is inhibited, and occurrence and quick development of polygon out-of-round is also inhibited; a solution is provided for solving blindness in current damper selection and damping methods as well as solving the wheel tread failures and the polygon out-of-round which occur frequently in China's rail transit.

The invention provides a method for judging the tail end of faults when multiple faults occur in an open-loop peer-to-peer network. Electric switches meeting the following conditions are judged to be at the tail end of the faults: in terms of a common switch, fault currents flow through the common switch, and at least one electric switch adjacent to the common switch and with the fault currents flowing through exists on one and only one side of two sides of the common switch; in terms of a boundary switch, the fault currents flow through the boundary switch, and electric switches adjacent to the boundary switch have no fault current flowing through; in terms of an end switch, the fault currents flow through the end switch. The method can solve the problem of how to judge multiple faults. When multiple faults occur simultaneously, multiple fault sections can be accurately judged simultaneously, impact frequency of the fault currents on a power grid is reduced, time of power failure caused by the faults is shortened, the influence range of the faults is reduced, and reliability and security of the power grid are improved in the operation process.

The invention relates to a marine photovoltaic platform and an operating method of the marine photovoltaic platform. The marine photovoltaic platform comprises a base body and a plurality of hinges arranged around the base body, wherein the base body comprises a bowl-shaped water collection part, a cylindrical floating part and a cone-shaped gravity part for stabilizing the gravity and adjusting the buoyancy force of the platform from top to bottom; one end of each of the hinges is articulated with the periphery of the water collection part, and the upper surface of each hinge is provided with a plurality of photovoltaic panels; and the hinges can be enclosed with the water collection part after rotating along articulated points to form a sealed cavity. According to the marine photovoltaic platform and the operating method of the marine photovoltaic platform, marine photovoltaic power generation equipment is used for carrying out sealing to be isolated with the outside in the period of time that solar power cannot be utilized for power generation at night, so that the time that the photovoltaic power generation equipment is eroded is reduced; and due to the fact that the night approximately accounts for half of the whole day, the time that the photovoltaic power generation equipment is eroded can be effectively reduced by half, so that the service life of the photovoltaic power generation equipment is greatly prolonged.

The invention relates to a cleaning device for a cutting base. The cleaning device comprises a moving block, a connecting rod, a driving mechanism and a cleaning mechanism, the driving mechanism comprises a connecting plate, a transverse plate, a moving rod, a sliding block and a first spring, and the cleaning mechanism comprises a piston cylinder, a second spring, a pulling rod, a blade and a pulling assembly. According to the cleaning device for the cutting base, the cleaning mechanism and the driving mechanism are matched to clean a main body, the blade impacts a cut product through the restoring force of a second spring, the blade better abuts against the main body through the restoring force of a torsional spring, and therefore the cleaning effect is improved, the impact force of the blade is improved through a third spring, so that the impact frequency is reduced, the working efficiency is improved, the labor intensity of workers is reduced, meanwhile, a movable block is limited through a positioning mechanism, the movable block can better move on the main body, meanwhile, the cleaned main body is swept, and the use practicability is improved.

The invention provides a gear control method and device. The gear control method includes the steps that under the condition of determining a first target position and a second target position of a driven disc of a clutch in a static starting shifting stage, the driven disc is controlled to move between the first target position and the second target position in the static starting shifting stage,then, the rotation speed of an input shaft of a speed changer connected with the clutch is kept within a preset rotation speed range, and when the rotation speed of the input shaft of the speed changer is kept within the preset rotation speed range, the gear is controlled to be switched to a starting gear of the static starting shifting stage; when the gear is controlled to be switched, the inputshaft of the speed changer reaches a certain rotation speed, the speed difference between the rotation speed of the input shaft and a target rotation speed is reduced, therefore, the gear can be controlled to be switched successfully in one time, relative to repeated switching, the number of shocked times of the speed changer is reduced, and the service life of the speed changer can be prolonged;the speed difference between the rotation speed of the input shaft and the target rotation speed is reduced, so that shock is reduced, then vehicle waggling is reduced, and therefore the vehicle performance is improved.

The invention relates to impact resistance detection equipment, in particular to concrete impact resistance detection equipment. The technical problem to be solved is to provide the impact resistance detection equipment for the concrete precast slab, which is less in manual participation and high in detection efficiency. According to the technical scheme, the concrete impact resistance detection equipment comprises table legs, a base, a bottom plate, a support, an impact device, a clamping device and the like. Wherein the base is fixedly arranged on the table legs, a bottom plate is fixedly arranged on the base, the support is fixedly arranged above one side of the bottom plate, the impact device is arranged on the support, the clamping device is arranged above one side of the bottom plate, and the clamping device is arranged below the impact device. An electromagnet, the iron plate and an impact column are additionally arranged, manual participation is reduced through the installation of the electromagnet, the iron plate and the impact column, the detection efficiency is improved, the impact column can control force to impact the center position through the installation of a long plate and a third spring, the impact frequency is reduced, and obtained data are more accurate.

The invention discloses an electric tool, which comprises a casing, a motor housed in the casing, an output shaft driven by the motor to rotate, and a chuck connecting the output shaft and a tool. There is an impact ring that can move axially but cannot rotate in the circumferential direction, a rotatable ring with an inner ring gear and a reduction shaft with large and small gears. The reduction shaft is arranged axially parallel to the output shaft of the motor. The motor The output shaft is sleeved with a guide sleeve that can be disengaged from or connected to the chuck in the axial direction. The guide sleeve is provided with an outer ring gear that meshes with the large gear of the reduction shaft, and the pinion gear of the reduction shaft is connected with the The inner ring gear of the ring is meshed, the impact ring and the opposite end surface of the ring are respectively provided with impactable impact teeth, and a spring is arranged between the impact ring and the casing, and one end of the spring is connected to the The casing is connected, and the other end is connected with the impact ring. The electric tool of the invention can disassemble and assemble the cutting tool conveniently and quickly.

The invention relates to a controlled source of pulse codes. The bottom end of a base connection carriage is connected with a lower pressing plate at the lower one-third position of the carriage, a coil cylinder and a coil are arranged between an upper pressing plate and the lower pressing plate, a fastening screw penetrates through a locating sleeve to be connected with the upper pressing plate and the carriage, a code controller is connected with the coil, an adjustable screw support cylinder is installed in the middle of the upper pressing plate, and an adjustable screw is connected with the adjustable screw support cylinder to form the controlled source. Coding impact orders generated by the controlled source of the pulse codes has ideal paseudo-random characteristics, can notably reduce impact times, improves construction efficiency, and has high seismic prospecting resolution ratio and signal to noise ratio due to the fact that codes stimulate obtained original seismographic records which can be equivalent to macro-energy single-pulse source signals after relevant decoding operation. Mechanical parts of the controlled source can be rapidly disassembled and assembled, and is convenient to carry and construct, applicable to earthquake exploration in cities and mountainous regions and superficial layer projects, simple in structure, convenient to carry and high in stability.

The plate forming process and apparatus belongs to the field of laser processing technology. The present invention has CO2 laser for pre-heating plate, infrared thermometer for measuring and controlling the plate heating temperature, neodymium glass laser for providing powerful short laser pulse to induce the generation of laser shock wave as the forming force source in processing plate and plate deformation measuring feedback device. The present invention is superior to laser thermal stress forming process, which has inferior formed surface quality, and laser shock forming process, which has small deformation amount, and can form plate directly in relatively great deformation amount, relatively high size precision and relatively high surface quality.

The invention discloses a linear robot arm and a robot cooperative blanking system, including a robot unloading system, a frame and a linear robotic arm blanking system. The linear robotic arm blanking system includes a beam, a servo motor, two guide rails, and two sliders , slider seat, transmission mechanism, overturning motor and blank take-off plate, the robot blank unloading system includes the robot and the blank unloading plate installed on the terminal shaft of the robot, the blank unloading position and the blank take-off position are set on the guide rail, the servo motor drives the slide The block reciprocates between the blank unloading position and the blank picking position. When the slider is at the blank unloading position, after the blank unloading plate and the blank taking plate are arranged in parallel to form a blank unloading space between the two, the turning motor drives the blank picking work. The end is turned from horizontal to vertical downward, and the unloading plate is turned over with the blank plate. The drop height of the preform is small, and the instantaneous impact force on the preform is small, which avoids the drop deformation of the preform and effectively guarantees the quality of the preform, especially suitable for the working conditions of heavy weight and long length of the preform.

The invention relates to a decompression pool and belongs to the technical field of decompression of water guiding and conveying pipelines. The pressure reduction pool comprises a pool body, a water inlet pipe and a water outlet pipe, a floating ball valve is arranged on the water inlet pipe and used for opening and closing a water outlet of the water inlet pipe, a partition piece is further arranged in the pressure reduction pool and divides the space in the pressure reduction pool into an energy dissipation pool and a water outlet pool, and a through hole communicated with the energy dissipation pool and the water outlet pool is formed in the partition piece. A water outlet of the water inlet pipe is matched with the energy dissipation pool in position, a floating ball of the floating ball valve is located in the water outlet pool, and the water outlet pipe is communicated with the water outlet pool. When the floating ball valve is closed, the height of the partition piece in the vertical direction is not lower than the highest limit water line corresponding to the highest limit water line of the water outlet tank; when the floating ball valve is completely opened, the highest point of the inner wall of the through hole in the vertical direction is not higher than the lowest limit water line corresponding to the lowest limit water line of the water outlet tank. The device can reduce the risk that the floating ball valve is damaged by the water hammer.

The invention discloses an electric tool which comprises a casing, a motor, an output shaft and a clamping head, wherein the motor is contained in the casing; the output shaft is driven by the motor to rotate; and the clamping head is connected with the output shaft and a cutting tool. The electric tool is characterized in that the casing is provided with first impact teeth; the output shaft is provided with an impact device which can be axially moved to disconnect or connect with the clamping head; and the impact device is provided with second impact teeth which are matched with the first impact teeth of the casing. When the impact device and the clamping head are connected to rotate, the first impact teeth on the casing and the second impact teeth on the impact device form impact. As the automatic impact structure is adopted, the electric tool effectively utilizes the driving force of the motor, and applies the impact force on the clamping head in the clamping or loosening direction, the clamping head automatically loosens or clamps, and then the cutting tool can be conveniently and quickly disassembled or assembled. The invention has the advantages of simple structure, low cost and convenient use.

The invention discloses a damping and damper selection method for reducing wheel tread failures in rail transit. A positive non-linear damper is selected, wherein the change rate of the absolute value of damping force F of the positive non-linear damper to the vibration velocity absolute value V is a constant or a progressive increase coefficient; when a damping object is subjected to positive or negative damping relative to the polarity of the vibration velocity V, the polarity of the generated damping force F is always opposite to the polarity of the vibration velocity V. The damping and damper selection method has the advantages that persistent wheel vibration and persistent wheeltrack impact caused and induced by accidental wheeltrack impact can be reduced effectively, vibration amplitude and impact frequency of wheeltrack resonance can be reduced, and accordingly, wheel damage caused by accidental impact is inhibited effectively; particularly, damage 'duplication' caused by induced continuous impact is inhibited, and occurrence and quick development of polygon out-of-round is also inhibited; a solution is provided for solving blindness in current damper selection and damping methods as well as solving the wheel tread failures and the polygon out-of-round which occur frequently in China's rail transit.

The invention provides an IGBT protection circuit and a protection method in a stepping motor driver, relates to the technical field of motors, and solves the technical problems of low judgment accuracy, short circuit overcurrent fault tolerance time, short IGBT service life and poor reliability in the protection of the IGBT in the existing motor driver. . Including control circuit, overcurrent protection circuit, current transformer, gate drive, gate drive, IGBT, gate resistor, gate zener diode and triode. The control circuit is connected to the gate drive and the base of the triode, the gate drive is connected to the gate of the IGBT through the gate resistor, the collector of the triode is connected to the cathode of the Zener diode, the anode of the Zener diode is connected to the gate of the IGBT, and the current transformer It is connected in series in the motor coil, the output end of the current transformer is connected with the input end of the overcurrent protection circuit, and the output end of the overcurrent protection circuit is connected with the control circuit. The invention reduces the protection times of the overcurrent current and improves the working efficiency of the driver.

The invention discloses a counter balance leveled by using communicating vessels, wherein the communicating vessels are arranged at the two ends of a balance lever, the balance is leveled by using the flowing of liquid in the communicating vessels, and then the flowing of the liquid is blocked. Therefore, the leveling time is shortened, and the service life of the balance can be prolonged due to low manual impact frequency and low strength.

The invention discloses an electric router. The electric router comprises a casing, an electric motor, an output shaft, a grip and a spin device, wherein the electric motor is arranged in the casing; the output shaft is driven by the electric motor to rotate; the grip is sleeved on the output shaft, is used to connect the output shaft with a cutter and can perform axial movement relative to the output shaft; and the spin device is connected with the casing in a fitting manner, is fixedly connected with the grip in a rotating manner and can perform axial movement relative to the output shaft when the output shaft rotates. The electric router of the invention adopts the spin device and utilizes the rotation of the output shaft to ensure the grip to perform axial movement for loosing or clamping, thus the cutter can be convenient and fast to dismount; and the electric router of the invention is characterized by simple structure, low cost and convenient operation.

The invention provides a gear control method and device. The gear control method includes the steps that under the condition of determining a first target position and a second target position of a driven disc of a clutch in a static starting shifting stage, the driven disc is controlled to move between the first target position and the second target position in the static starting shifting stage,then, the rotation speed of an input shaft of a speed changer connected with the clutch is kept within a preset rotation speed range, and when the rotation speed of the input shaft of the speed changer is kept within the preset rotation speed range, the gear is controlled to be switched to a starting gear of the static starting shifting stage; when the gear is controlled to be switched, the inputshaft of the speed changer reaches a certain rotation speed, the speed difference between the rotation speed of the input shaft and a target rotation speed is reduced, therefore, the gear can be controlled to be switched successfully in one time, relative to repeated switching, the number of shocked times of the speed changer is reduced, and the service life of the speed changer can be prolonged;the speed difference between the rotation speed of the input shaft and the target rotation speed is reduced, so that shock is reduced, then vehicle waggling is reduced, and therefore the vehicle performance is improved.

The invention discloses an electric router. The electric router comprises a casing, an electric motor, an output shaft, a grip and a spin device, wherein the electric motor is arranged in the casing; the output shaft is driven by the electric motor to rotate; the grip is sleeved on the output shaft, is used to connect the output shaft with a cutter and can perform axial movement relative to the output shaft; and the spin device is connected with the casing in a fitting manner, is fixedly connected with the grip in a rotating manner and can perform axial movement relative to the output shaft when the output shaft rotates. The electric router of the invention adopts the spin device and utilizes the rotation of the output shaft to ensure the grip to perform axial movement for loosing or clamping, thus the cutter can be convenient and fast to dismount; and the electric router of the invention is characterized by simple structure, low cost and convenient operation.