18results about How to "Avoid overheating and burning" patented technology

The invention relates to a high-voltage cable accessory and cable corrugated aluminum sheath automatic lead coating machine, which comprises a fixing unit, a rotary positioning unit, an operation system and a control module, and is characterized in that the operation system is mounted on the rotary positioning unit, the rotary positioning unit is mounted on the fixing unit, and the fixing unit fixes and clamps a cable; the control module controls the fixing unit, the rotary positioning unit and the operation system to conduct lead coating on the high-voltage cable accessory and the cable corrugated aluminum sheath, the lead coating quality and efficiency can be improved, and automatic operation of the lead coating process is achieved. The invention further provides a lead enameling process using the automatic lead enameling machine for the high-voltage cable accessory and the cable corrugated aluminum sheath, the operation is simple and convenient, and the defect that the manual lead enameling efficiency of the high-voltage cable accessory and the cable corrugated aluminum sheath is low is overcome; and the defects of poor lead coating and safety accidents caused by uneven levels of cable accessory installation personnel and the influence of the field operation environment on the technology are overcome.

The utility model provides a motor heat dissipation structure and an oil smoke exhaust fan, and relates to the technical field of range hoods, the near end of the motor heat dissipation structure is connected with a motor, the motor heat dissipation structure comprises a heat dissipation inner cavity, a heat dissipation outer cavity, a cooling assembly and an air source, the near end of the heat dissipation inner cavity is open and faces the tail end of the motor; the heat dissipation outer cavity is located on the circumferential outer side of the heat dissipation inner cavity, and the heat dissipation outer cavity and the heat dissipation inner cavity are separated through a heat insulation piece; the cooling assembly is connected with the heat insulation piece and comprises a refrigeration part located in the heat dissipation inner cavity and a heat dissipation part located in the heat dissipation outer cavity. The air source is used for generating airflow flowing from the far end to the near end in the heat dissipation inner cavity.

The utility model discloses a special furnace end for a commercial fuel oil pot furnace, which comprises a furnace end seat, a placing cavity is arranged on the end face of the furnace end seat, an ignition cover is integrally formed on the end face of the furnace end seat, an upper flame arrester, a lower flame arrester and a flame distributor are arranged in the placing cavity, and a rotating mechanism is arranged in the ignition cover. The outer walls of the upper and lower flame arresters are cover bodies, annular flanges are integrally formed on the attached edge surfaces, and the rotating mechanism is used for driving the upper flame arresters to rotate relative to the positions of the lower flame arresters. By means of meshing transmission of the gear and the annular gear disc, the upper slow fire device is driven to rotate relative to the lower slow fire device, the overlapping area of the first fire outlet hole and the second fire outlet hole is dynamically adjusted, accurate control over the flame jetting amount is achieved, and compared with a traditional furnace end, the furnace end can stably output slow fire needed by slow stewing with small fire, and the energy consumption is reduced. The cooking liquor is effectively prevented from boiling and overflowing or food materials are prevented from being locally overheated and scorched, and the cooking quality of soup cooking and porridge cooking is remarkably improved.

A modular charging pile convenient to maintain disclosed by the present invention comprises a charging pile, an electric box and a plurality of charging modules embedded in the electric box, one side of each charging module is provided with a rectification electric plate used for being electrically connected with an external power supply, and the rectification electric plates are fixedly installed on one side of the interior of the electric box. And an inert gas tank for inert gas is fixedly mounted on one side of the rectifying electric plate. During normal work, the electromagnet generates a magnetic field to enable the magnetorheological fluid to keep certain viscosity, the stability of the conducting strip and the piston plate is ensured, and a current path is maintained; by designing an electromagnet, a Venturi tube, a conducting strip and other devices, when the charging module breaks down and the current is sharply increased, a metal diaphragm of the conducting strip is fused, the electromagnet loses excitation, a first spring piece pushes a piston plate to extrude magnetorheological fluid to wrap a clamping groove to cut off electric connection, meanwhile, deionized water is treated to loosen a buckle, fault expansion is prevented, and the system safety is improved; and the damage to the charging module and other equipment caused by short circuit is reduced.

The invention provides a low-noise motor, and relates to the technical field of motors. The low-noise motor comprises a motor shell, a power connection box installed at the top of the motor shell, a stator assembly installed on the inner side wall of the motor shell, rotor bearings arranged at the centers of the front side wall and the rear side wall of the motor shell, and rotor assemblies installed on inner shafts of the two rotor bearings. Variable damping supporting assemblies are installed at the centers of the front side wall and the rear side wall of the motor shell correspondingly, each variable damping supporting assembly comprises a supporting sleeve installed on the outer wall of the motor shell, and the two rotor bearings are installed at the centers of the two supporting sleeves correspondingly. According to the invention, the problems that heat cannot be dissipated due to long-term operation of the motor and the bearing displaces due to the fact that the bearing bears huge pressure and friction force from the rotor assembly are solved, and the possibility of bearing deflection is reduced through the magnetorheological fluid with variable damping, so that the vibration of the shaft lever and the noise generated by the vibration are reduced.

The embodiment of the utility model discloses a self-temperature-limiting heating film, a heating module and a heating device, the self-temperature-limiting heating film comprises a heating layer, a first insulating layer and a second insulating layer, the first insulating layer, the heating layer and the second insulating layer are stacked in sequence, the heating layer is a PTC (Positive Temperature Coefficient) heating layer, the heating layer comprises a plurality of heating film strips, and the heating film strips are connected in parallel. When the temperature of the heating material in the PTC heating layer reaches a certain value, the resistance value of the heating material suddenly changes to be infinite, so that the temperature cannot continuously rise and is maintained within a certain temperature range, and when the temperature drops to a certain value, the heating function is restored, and the PTC heating layer can have an automatic temperature limiting function, so that the heating film is prevented from being overheated and burnt.

The application discloses a kind of over-temperature protection circuit and the power operational amplifier with over-temperature protection function, over-temperature protection circuit includes temperature detection unit, control module and signal output unit, temperature detection unit is used to export corresponding temperature response voltage according to ambient temperature;Control module is used to export the over-temperature opening voltage greater than third voltage threshold when the temperature response voltage is higher than first voltage threshold to signal output unit, and until the temperature response voltage is lower than second voltage threshold, stop outputting over-temperature opening voltage or make over-temperature opening voltage lower than third voltage threshold;Signal output unit is used to export over-temperature protection current signal when over-temperature opening voltage is greater than third voltage threshold.The application can export over-temperature protection current signal to protected device when ambient temperature is too high, and has hysteresis reaction function when ambient temperature decreases, avoid frequently switching working state.

The utility model discloses a kind of electric connection unit and the electric connection structure formed by it, it is related to low-voltage power distribution equipment technical field, electric connection unit includes wiring terminal, electric connection component and connecting row, electric connection component includes contact unit, mouth opening opening and closing limiting mechanism and heat dissipation structure, contact unit one end is electrically connected with wiring terminal, contact unit other end is provided with contact mouth opening, contact mouth opening is used for being pluggable with connecting row in, and in connecting state with connecting row electrical communication;Mouth opening opening and closing limiting mechanism is worn on contact unit, can make contact mouth opening clamp connecting row;Heat dissipation structure is set on mouth opening opening and closing limiting mechanism or contact unit, heat dissipation structure can be heat dissipation to contact unit, heat dissipation is good, improve the operation safety and reliability of equipment.Electric connection structure contains above-mentioned electric connection unit, can be used under the condition of large current, improve the operation safety and reliability of electric connection structure simultaneously.

The invention provides a rotor assembly of a self-starting permanent magnet auxiliary synchronous reluctance motor and a motor, the rotor assembly comprises a rotor iron core and permanent magnets, the rotor iron core comprises an outer layer filling groove, an inner layer filling groove, permanent magnet grooves, a shaft hole and a rotor excircle, the shaft hole is located at the central axis position of the rotor iron core, and the permanent magnet grooves are located in the outer layer filling groove. The permanent magnet grooves are located in the periphery of the shaft hole so that the permanent magnets can be arranged in the permanent magnet grooves, the inner-layer filling grooves are located between the permanent magnet grooves and the outer circle of the rotor, and the outer-layer filling grooves are located between the inner-layer filling grooves and the outer circle of the rotor. The permanent magnet grooves, the inner-layer filling grooves and the outer-layer filling grooves form a magnetic barrier layer in the radial direction of the rotor, and the inner-layer filling grooves and the outer-layer filling grooves are filled with conductive conductors. According to the self-starting permanent magnet auxiliary synchronous reluctance motor, the problem of low starting torque of the self-starting permanent magnet auxiliary synchronous reluctance motor in the prior art can be solved.

The invention provides a power control system, a control method of the power control system and a vehicle, the power control system comprises a vehicle control module and a disconnection control module, the disconnection control module is connected with the vehicle control module and a power disconnection device, the disconnection control module receives a combination instruction or a disconnection instruction from the vehicle control module, and the combination instruction or the disconnection instruction is sent to the vehicle control module. The power disconnecting device is controlled to be combined with or separated from the front axle; when the vehicle is powered off, the disconnection control module controls the power disconnection device to be separated from the front axle. The power control system can enable the power disconnection device to be in a disconnection mode before the vehicle is powered off, so that the problem that the first motor module is overheated and burnt down due to state conflict between the disconnection control module and the whole vehicle control module after the vehicle is powered on is avoided, the service life of the front axle and the first motor module is prolonged, and the service life of the vehicle is prolonged. The use reliability of the front axle and the first motor module is guaranteed, and meanwhile certain safety is improved.

A power supply output protection structure includes a power output port and a working management circuit. The power output port includes multiple power supply pins connected in parallel. The working management circuit individually detects the current of each of the multiple power supply pins and protects the power output port based on the detection results. This prevents uneven current distribution during power output, which could lead to overload on some of the multiple power supply pins and damage to the power output port.

The invention discloses an engine starting protection system which comprises an engine assembly, a whole vehicle control system and a starting motor, the engine assembly comprises a crankcase assembly, and the crankcase assembly is connected with the whole vehicle control system according to the power transmission direction. The crankcase assembly is sequentially provided with an engine starting protection device, a duplicate gear shaft assembly, a driven gear assembly, an overrun clutch assembly, a magneto rotor assembly and a crankshaft assembly, the starting motor drives the engine starting protection device, and the whole vehicle control system comprises a whole vehicle controller and a protection relay. One end of the protection relay is electrically connected with the vehicle control unit, the other end of the protection relay is electrically connected with the starting motor, and the vehicle control system monitors the starting torque of the crankshaft assembly. According to the engine starting protection system, the carbon fiber gaskets are arranged on the two sides of the starting driven gear, when the rotating torque of an engine crankshaft exceeds a set threshold value, the starting driven gear and the intermediate gear slip relative to the carbon fiber gaskets, and the effect of protecting the starting motor is achieved.

The application belongs to the technical field of cable connection fittings, and particularly relates to a shielded separable cable fitting with a temperature measuring function, which comprises the following scheme: a clamping mechanism, a hand holding shell fixedly arranged in the middle of the clamping mechanism, a protective shell fixedly arranged at the end of the clamping mechanism, a neodymium magnet embedded in the middle of the protective shell, a check mechanism arranged at both ends of the clamping mechanism, the clamping mechanism comprising: an insulating shell, the outer surface of the insulating shell fixedly arranged at the end of the protective shell, a metal cylinder, the metal cylinder nested in the middle of the insulating shell, an internal thread, the internal thread open arranged on the inner wall of both ends of the metal cylinder, a metal ring, the metal ring fixedly sleeved on the inner wall of the metal cylinder, and a metal plate, the outer surface of the metal plate fixedly arranged on the inner wall of the metal ring. The worm and gear self-locking clamping is adopted, the worm and gear transmission structure is adopted in the never-loose check mechanism, and the worm and gear transmission structure has the characteristics of one-way driving and reverse self-locking.

The utility model discloses a valve casting dust removal device which comprises a movable seat, a dust removal piece used for removing dust generated during valve casting is arranged at the upper end of the movable seat, and the dust removal piece comprises an air exhauster assembly arranged at the rear end of the upper side of the movable seat and used for guiding the dust; the filter part is arranged at the front end of the upper side of the moving seat and used for filtering and recycling dust, the filter part comprises a machine shell which is respectively connected with the moving seat and the air extractor assembly, a filter plate for filtering dust is arranged on the front side of the machine shell, and the lower side, corresponding to the filter plate, of the moving seat is connected with a recycling box in a sliding mode. According to the dust removal device for valve casting, the dredging piece is arranged in the filter piece, the micro motor is matched with the rotary disc and the traction rod, the dredging plate dredges the filter holes in the filter plate so as to promote the filter holes to fall into the recovery box, dust gathered on the outer side of the filter plate and at the filter hole ends is treated in cooperation with the sweeping piece, and the situation that the dust removal efficiency is affected due to blockage of the filter plate is prevented.

The invention discloses an estimation method for monitoring the junction temperature of an IGBT module, and the method comprises the following steps: 1), building a third-order Foster thermal network model, and obtaining a third-order self-heating thermal resistance constant, a third-order mutual-heating thermal resistance constant and a third-order heat transfer time constant; 2) collecting phase voltage, phase current and junction temperature of each phase; (3) micro switching states of the IGBTs and the FRDs are judged, and the PWM switching frequency and the duty ratio are obtained; 4) calculating turn-on loss, turn-off loss and turn-on loss of each IGBT and reverse recovery loss and turn-on loss of the FRD; calculating the loss of the metal bonding wire; 5) calculating the total loss of each IGBT and each FRD; 6) calculating the total temperature rise of each IGBT and each FRD; 7) calculating the total temperature difference from each phase NTC temperature sensor to the cooling liquid; 8) calculating the cooling liquid temperature of each phase, and estimating the estimated junction temperature of each IGBT and each FRD; and 9) detecting the real-time junction temperature, comparing the real-time junction temperature with the estimated junction temperature, if the estimated junction temperature is within the error range, determining that the estimated junction temperature is the final junction temperature, and if the estimated junction temperature is not within the error range, performing correction, and repeating the steps 3-9) until the estimated junction temperature is within the error range.

The utility model discloses a LED-UV curing system for high -speed rotary machine. The utility model relates to curing system technical field, and this includes frame, control system and at least 1 curing unit of installing on the frame, the curing unit includes first curing module and second curing module, first curing module and second curing module all are provided with LED-UV lamp and cooling system, and first, second curing module is distributed along the L shape transmission path of the printing material before and after, and the LED-UV lamp in each curing module is opposite arrangement with cooling system, and the passage for the printing material to pass through is formed between the two, and the printing material passes through the corresponding passage of first curing module, second curing module in proper order, and the LED-UV lamp of first, second curing module acts on the printing material double face in proper order, and the printing material double face is cured. By setting first, second curing module can be cured in proper order to the printing material double face, and the curing demand of adaptation double -sided printing or permeability material is improved production efficiency significantly.

The smoke exhaust device comprises a smoke exhaust pipe, a motor fan component is arranged on the inner side of the top of the smoke exhaust pipe, a protection frame is arranged on the inner side of the bottom of the smoke exhaust pipe, two fan rotating components are symmetrically arranged at the two ends of the bottom of the smoke exhaust pipe, and a water pump is arranged on one side of the smoke exhaust pipe; movable valve parts are arranged on the sides, close to each other, of the tops of the two fan rotating parts; a water conveying pipe is arranged on the side, close to the smoke exhaust pipe, of the water pump; two springs are symmetrically arranged at the two ends of the top of the movable valve part, and the bottom of one side of the movable valve part penetrates through the smoke exhaust pipe and is provided with a spray pipe part. By means of the structure, water can be sprayed to cool high-temperature smoke extracted by the motor fan component, the motor fan component is prevented from being overheated and burnt, meanwhile, in the cooling process, particulate matter in the motor fan component can be filtered out, the smoke exhaust pipe is prevented from being blocked, water can be sprayed according to the degree of a fire, and water resources are saved.