235results about How to "Guaranteed working life" patented technology

The invention discloses a novel two-stage bidirectional energy storage converter control system and a control method thereof. An energy storage converter main circuit mainly comprises a three-phase voltage type PWM (Pulse Width Modulation) rectifier, a novel half bridge three-level push-pull bidirectional DC-DC converter, a charging-discharging buffer interface circuit for limiting battery charging current, and a battery pack module. A control system circuit mainly comprises a voltage and current sensor, a driving circuit, a protection circuit, a main controller, an SOC (State of Charge) detection module, a radiator, a buzzer, a man-machine interface, a communication interface circuit and a system auxiliary power supply. The alternating-current micro-grid power or voltage and the states of charge of energy storage batteries can be detected in real time, so that the running modes of each generating set and the energy storage converter in a micro-grid system are controlled flexibly, and the effects of 'filling peaks and clipping valleys' in a power system, smoothening power in a wind-solar hybrid micro-grid system and the like are achieved. Moreover, the control system has the advantages of high power density, small size, high efficiency, low harmonic content, high reliability, high self-control degree and the like.

The invention relates to a floatation type brake pad for a high speed train.. The floatation type brake pad is characterized by comprising a pad rear panel, a dovetail board, friction block bodies, an elastic supporting sheet and a round spring clip; the pad rear panel is in an arc half-sole structure; the elastic supporting sheet is provided with a spherical supporting surface and a center guide hole; the frication block is provided with a spherical supporting surface and a guide connection shaft with a clamping groove; the elastic supporting sheet, the round spring clip and the friction block bodies are in elastic floatation connection with the pad rear panel; the spherical supporting surface of the elastic supporting sheet and the spherical supporting surface at the root of a connection shaft of each friction block body are rotary, so that the balance of a braking force is realized; the three single-arc quadrilateral friction bodies in one group are mutually engaged and locked; and friction bodies of four cylindrical grinding column bodies are mutually engaged and locked in pairs. With the adoption of the floatation type brake pad provided by the invention, a maximum contact friction area can be obtained, so that a braking process is stable, and the functions of damping, vibration attenuation, noise reduction, heat radiation and the like can be achieved. The friction blocks are easy to replace; the operation cost is low; and the floatation type brake pad can be widely used for a braking system of the high speed train.

The invention relates to a floating type train brake lining with replaceable friction blocks. The train brake lining is characterized in that the train brake lining comprises a brake lining back plate, a plurality of brake lining friction block bodies, a plurality of elastic supporting pieces and a plurality of round spring clips; installation holes are arranged on the brake lining back plate; elastic supporting pieces are provided with spherical supporting surfaces and central guide holes; lower portions of friction block bodies are provided with spherical supporting surfaces and positioning connection shafts with clamping grooves, and connection shafts can penetrate through central guide holes of elastic supporting pieces and positioning holes of the back plate and are locked on the back plate by round spring clips to achieve floating connection; and friction block bodies are polygonal block bodies with blind holes in centers, and every three friction block bodies form an interlocking group, so that rotation of friction block bodies during operation of the brake lining is prevented. By the aid of the brake lining, the maximum contact friction area between the brake lining and a braking disk can be obtained during braking of a train, so that the braking process is stable, functions such as damping, vibration absorption, noise reduction and heat dissipation are provided, friction block bodies are easy to replace, the operation cost of the train is reduced, and the brake lining can be widely used in braking systems of high-speed trains.

The invention discloses a high-speed reciprocating type color 3D (Three-dimensional) printer which comprises a spray head component capable of horizontally moving along one direction, preferably the X-axis direction, and a working table capable of vertically moving along the Z-axis direction, wherein a plurality of spray pipes are mounted on the spray head component, and respectively contain various liquid printing materials including a white base material and various color materials. In one moving process, the spray pipes work separately, an image, particularly an area of darker color in the image, is printed out with the white base material, then colors of the image are printed with the color materials, and partial area in the finally formed image is bulged outward, so that the three-dimension effect of the image is improved, and the image is more vivid; the printing speed of the high-speed reciprocating type color 3D printer is world-leading; and the high-speed reciprocating type color 3D printer is quicker and more flexible, is higher in efficiency, and is especially suitable for mass production.

The invention relates to a preparation method for a rhenium-iridium combustion chamber. The preparation method comprises the following steps: preparing a rhenium combustion chamber by adopting a powder metallurgy near-net shape forming technology; preparing iridium coatings at inner and outer surfaces of the rhenium combustion chamber by adopting an electric-arc deposition technology; preparing a platinum-rhodium ring by adopting a spinning technology and assembling the platinum-rhodium ring on the inner wall surface of the combustion chamber; and preparing a metal oxide high-radiation coating on the outer surface of the combustion chamber by adopting a plasma spraying technology. According to the preparation method, by virtue of an optimized design of process methods and process conditions at different stages of a preparation process, the prepared rhenium-iridium combustion chamber is applied to an engine, so that a use and working environment of the engine can be remarkably increased, specific impulse can be improved for the engine, and technical support is provided for prolonging flight life of an aircraft, increasing effective load of the aircraft or increasing range of the aircraft.

The invention relates to a shooting device, in particular to a camera which can still maintain normal working at the complicated environmental temperature. The camera comprises a micro-processor for controlling the whole operation process and also comprises a temperature detection and control unit, wherein the temperature detection and control unit can carry out data exchange with the micro-processor and comprises a temperature detecting unit which can detect the surrounding environmental temperature of the camera and transmit a detecting result to the micro-processor and a temperature control unit which carries out heating or cooling operation under the control of the micro-processor. The invention enables the camera, particularly cameras adopting CCD as a main component to normally work in the complicated external environment and particularly to adapt to the environment with larger external temperature change and ensures the service life of all chips, thereby effectively prolonging the service time of the camera.

A vertical cement pipe forming machine is composed of base, a set of feeding unit consisting of conveying belt and walking mechanism and at least two sets of forming units. Each forming unit consists of machine frame, concentric internal mould, external mould and vibrating mandrel, shaping dies, and die pressing frame.

The invention discloses a rapid color 3D printing device. The device comprises a nozzle assembly capable of moving in the X-axis direction and a workbench capable of moving in the Y-axis direction and the Z-axis vertical direction. A plurality of spraying pipes are installed on the nozzle assembly and contain various liquid printing materials including the white matrix material and the various color materials. When the rapid color 3D printing device moves one time, all the spraying pipes work respectively. Firstly, an image is printed through the white matrix material, in particular, the region, with the dark color, of the image is printed through the color materials, and the partial region of the finally-formed image protrude outwards, so that the third dimension of the image is improved, the image is more vivid, and the rapid color 3D printing device is rapid, efficient and flexible in printing and suitable for mass production.

A mechanical underground vibration-absorption punching drilling tool comprises a spline mandrel, a spline cylinder, a vibration-reducing return spring outer cylinder, and a punching assembly outer cylinder, wherein an upper part matching joint is connected to the top end of the spline mandrel; the spline cylinder is connected with the vibration-reducing return spring outer cylinder and the punching assembly outer cylinder into a whole; the spline mandrel is arranged in the spline cylinder, the vibration-reducing return spring outer cylinder and the punching assembly outer cylinder; the lower end of the spline mandrel is connected with a shunting structure; the spline mandrel is connected with a plunger through the shunting structure; the lower end of the plunger is arranged in a punching cylinder; the lower part of the punching cylinder is arranged in a punching bearing structure; the lower end of the punching bearing structure is connected with a lower part matching joint; and a spacing structure is arranged at the lower end of the punching assembly outer cylinder. According to the invention, the vibration reduction for a drill string is combined with the high-frequency low-punching power of a drill bit, and longitudinal vibration easy to cause fatigue rupture of the drill string is converted into internal energy of a vibration-reducing return spring and punching power providing convenience for improving drilling speed, so as to fulfill rotary punching drilling and improve rock breaking efficiency.

The invention relates to a method for preparing reinforcing coating on the surface of a continuous casting crystallizer, comprising the steps as follow: preprocessing a crystallizer copper plate surface or a copper alloy plate surface, and spray painting the metal ceramic powder directly on the crystallizer copper plate surface or the copper alloy plate surface by exploding spray painting method to form surface reinforcing coating, wherein the metal ceramic powder consists of alloy and carbide, Ni-Cr alloy and Cr3C2 are preferred. The invention overcomes the drawbacks existing in the prior art, which has better integrating performance between the reinforcing coating and the copper or the copper alloy based body, and is adaptable to the work environment of the crystallizer, and avoids the preparation of middle transition coating, so as to simplify manufacture and repair method of the crystallizer and reduces the cost. The invention is widely suitable for reinforcing and repairing the copper surface or the copper alloy surface.

The invention discloses a cooling device of an electric drive bulldozer. The cooling device comprises an engine cooling device which is used for cooling mechanical heat source parts; the cooling device also comprises a circuit cooling device which is used for cooling electronic heat source parts. The circuit cooling device is added on the cooling device of the electric drive bulldozer on the basis of the existing engine cooling device, so that the electronic heat source parts of the electric drive bulldozer can be independently cooled, therefore, the cooling device is not only beneficial to intensifying the heat dissipation capability of the electronic heat source parts with a relative lower working temperature, and simultaneously, is beneficial to ensuring the heat dissipation reliability of the high temperature mechanical heat source parts, such as engine, and further, the cooling effect of the cooling device of the electric drive bulldozer is improved. In addition, the invention also discloses an electric drive bulldozer which comprises the cooling device.

The invention relates to an ingot vacuum furnace which is suitable for making polysilicon with large size and high purity. An insulating cover is designed to be a lifting type. A main body of a lifting mechanism consisting of a servo linear motion mechanism and a continuous-motion bar is arranged on a furnace cover, wherein, one end of the continuous-motion bar is fixedly arranged on the top of the insulating cover. An electrode of a power supply part is a water cooling type. A transmission cable in the furnace is a flexibility water cooling type. As a material platform and a crucible are free from the working interference of the lifting mechanism, a fixed type of the crystallization quality is beneficial to being ensured. The volume size in the crucible is only related to the bearing ability of the material platform; therefore, the crucible with large capacity is easy to be arranged. Furthermore, the water cooling type of the upper and lower electrodes and the water cooling type of the flexibility cable are adopted to ensure the reliable service life, thus ensuring the free lifting of the insulating cover. The ingot vacuum furnace has the advantages of scientific and reasonable structure, reliable working, long service life, stable product quality and high purity, which is suitable for producing polysilicon with large size and high purity and has strong practicability.

The invention relates to the field of power semiconductor devices, and discloses a preparation method of a novel light break-through IGBT device. According to the IGBT device prepared by the preparation method, the structure of an N-type carrier storage layer and a P+ type floating layer is integrated, the IGBT device has advantages of high breakdown voltage, low forward conduction voltage drop and low turn-off loss, and the structure of N+ doping block layers and insulating block layers which are arranged in a staggered and spacing way side by side is arranged between a second P+ doping layer and a gate oxide layer so that the resistance value of an internal emission electrode integrated resistor can be greatly increased, increasing of internal saturation current can be effectively suppressed, the short circuit safe operating area of the IGBT device is expanded, and thus generation of high current impact can be avoided and the operating life of the device can be ensured.

The invention discloses a travelling safe guarantee dispatching method and system for an electric power tunnel routing inspection robot. The method comprises the steps that a dispatching center collects robot position information through a position collecting device mounted on the robot and monitors the position of the robot in real time; when it is found that the robot moves to the position awayfrom a firefighting door by a first set range, the dispatching center collects the open-close state of the current firefighting door through a monitoring terminal; the dispatching center determines the open-close state of the firefighting door for the first time; according to the open-close state of the firefighting door, the dispatching center sends an open-close instruction to the firefighting door through the monitoring terminal, and meanwhile the dispatching center sends an instruction of advancing continuing or stopping to the robot; if the robot continues advancing, when the position collecting device of the robot collects the information that the robot enters into a second set range of the firefighting door, the robot communicates with a controller of the current firefighting door,and the robot determines the open-close state of the firefighting door for the second time; and according to the open-close state of the firefighting door, the robot sends the instruction of advancingcontinuing or stopping to the robot.

The invention belongs to the technology of electric resistance and electric heating, and relates to a non-inductance electric heating resistance device which can be used as a resistor. The non-inductance electric heating resistance device comprises at least one electric heating tube without inductance after electrification. The electric heating tube comprises an outer tube of the electric heating tube, an insulating ring and a fastener which are positioned at two ends of the outer tube of the electric heating tube, wiring terminals inserted to the insulating ring, spiral resistance wires penetrating into the outer tube of the electric heating tube, and a heat-conducting insulating material filled between the resistance wire and the outer tube of the electric heating tube; and the number of the resistance wires is two, the two resistance wires are arranged side by side and connected in parallel between the wiring terminals at two ends, and the spiral directions of the two spiral resistance wires are opposite. The non-inductance electric heating resistance device can be used as the resistor and an electric heater, and does not generate the inductance to circuits during working.

Provided is a short-circuit protection system of an energy-storage bidirectional converter. The short-circuit protection system comprises an AC side short-circuit protection module and a DC side short-circuit protection module, the two modules are designed independently and integrated inside a PCS, modular design is adopted by both protection, the AC side short-circuit protection module mainly comprises a diode three-phase full-bridge rectifier module, a high-power thyristor and resistors, and the DC side short-circuit protection module is formed by a high-power thyristor and resistors. The AC side short-circuit protection module is connected with a power conversion unit of the PCS in parallel, a three-phase supply firstly passes through the diode three-phase full-bridge rectifier module, then after the positive pole of a DC voltage output by a common cathode of the diode three-phase full-bridge rectifier module passes through the high-power thyristor, firstly the positive pole of the DC voltage passes through the resistors and finally flows back to a common anode of the diode three-phase full-bridge rectifier module, and a short-circuit protection loop is formed. The DC side short-circuit protection module is connected on a DC bus capacitor in parallel, the positive pole of a DC bus voltage firstly passes through the high-power thyristor, and then flows back to a DC bus negative pole through an absorption resistor, and the short-circuit protection loop is formed.

The invention relates to a water-cooled motor test platform and a use method. The water-cooled motor test platform comprises a control system, a test workbench and a water-cooled system, wherein the water-cooled system comprises a water tank, a circulating water pump and a heat radiator, a tested motor and a driven motor are respectively provided with a water-cooled casing, the water flowing out of the water tank is respectively received into the water-cooled casings of the tested motor and the driven motor by the circulating water pump, the water flowing back to the tested motor and the driven motor is gathered and received into the heat radiator and then returns back to the water tank, the heat radiator comprises heat radiating pipes and a fan, and water inlet pipes of the tested motor and the driven motor are respectively provided with an adjusting valve. The use method comprises the following steps that the tested motor and the driven motor are fixedly connected and are connected with wires, the water is added into the water-cooled system, and the circulating water pump is started; during test, firstly a controller is adjusted, and the rotation speed of the tested motor is gradually increased to one half of the rated rotation speed and is maintained for one hour; after the rotation speed is normal, the tested motor runs at the 1 / 3 and 1 / 2 of rated power; and only after the water temperatures of the water outlets of the tested motor and the driven motor are respectively below than 60 DEG C, the driving measurement is carried out. The water-cooled motor test platform and the use method have the advantages that the working temperatures of the tested motor and the driven motor are the same, the test data is more accurate, and the service life of the driven motor is also prolonged.

A glass vacuum solar heat collection tube of through two-end type consists of external glass tube, internal tube with corrugated body, absorption coated layer, elastic support and degasser. It is featured as setting space between two said tubes to be vacuum cavity, melt-jointing two ends of two said tubes to be an integral body for sealing two ends with each other and setting circular wave form ledges on internal tube to be distributed in mode of group wave ledges being not continuously set.

The invention is concerned with the fuel cell energy storing controlling assistance equipment, includes: the super capacitor bank, the double direction direct-direct current convertor, the current detective element, the current flow control element, and the voltage control element. It is: the super capacitor bank connects to the direct current busbar of the fuel cell through the double direction direct-direct current convertor; the current detective element passes the sampling loading current to the current control element by filtering, the voltage control element pass the sampling the voltage of the super capacitor bank to the current control element by adjusting, and the current control element conducts charging or discharging to the super capacitor bank after generates the algebraic sum of the two signal mentioned earlier, as the reference current control double direction direct-direct current convertor. The invention insures the operation security and the product life cycle of the fuel cell by changing the current of the fuel cell slowly when the loading disturbing, under the requirement of loading; and it improves the utilance of the super capacitor bank through charging or discharging by the double direction direct-direct current convertor.

The invention discloses a device for salvaging suspended solids in sewage treatment, and relates to the technical field of sewage treatment suspended solid salvaging equipment. The device comprises aworking box, a first cavity, a second cavity, a stirring shaft, a compression spring, an extrusion plate, a connecting channel, a discharging channel, an auger, a crawler belt, a bidirectional motor,a coupler, a first gear, a mounting block, a rotating shaft, a second gear, a turntable, a fixed rod, a push rod, a support plate, a chute, a moving block, a filter plate, a third cavity, a slider, areset spring, acompression roller, a first switch, a fourth cavity, a floating block, a second switch, a servo motor, a filter cavity, a third through groove, a first filter screen, a rubber spring, asecond filter screen, a baffle, a contact and a warning lamp. Sewage on the surface of suspended solids is extruded back into the first cavity to be reused, the suspended solids are extruded and crushed, the treatment difficulty of the suspended solids is reduced, and when the suspended solids on the second filter screen is too many, the warning lamp automatically reminds personnel to conduct cleaning work.

The invention discloses a high-precision movable environment data acquisition device which comprises a movable external enclosure and a circuit board arranged in the movable external enclosure. An environment data acquisition unit, a CPU (Central Processing Unit) module, a data storage unit, a LED (Light-Emitting diode) display unit, a power supply unit, a data download unit and a data communication interface are arranged on the circuit board, wherein the CPU module is used for carrying out quantitative analysis processing on information acquired by the environment data acquisition unit; the LED display unit is controlled by the CPU module and is used for synchronously displaying quantitative analysis results of all monitoring parameters; the data download unit and the data communication interface are respectively connected with the CPU module; and the environment data acquisition unit comprises a sensor group consisting of a plurality of sensors and a data acquisition module connected with the sensor group. The high-precision movable environment data acquisition device has simple structure and reasonable design, is simple and convenient to use and operate, is convenient to move, has high practical value and wide application range. The practical requirement for carrying out processing of synchronously acquiring, storing, downloading and accurately analyzing on environment parameters can be met.

The invention discloses a winch gear-shift clutch, which comprises a shell and a handle, wherein the shell is internally provided with a clutch cam gear shaft; a gear-shift cam shaft and a gear-shift clutch shaft are inserted into the clutch cam gear shaft; the cam curve surfaces on the clutch cam gear shaft and the gear-shift cam shaft are linked to fit in sequence; and a clutch reset spring is arranged between the clutch cam gear shaft and the shell, a gear-shift reset spring is arranged between the gear-shift cam shaft and the shell, the gear-shift clutch shaft is provided with a positioning component sliding on the cam curve surfaces, and the handle is fixedly connected with the gear-shift clutch shaft. The winch gear-shift clutch has the advantages of simple operation and reliable operation, and increases a double-speed function under the conditions that the winch function is not reduced and the ratio of the weight to the pull force of the winch is not reduced. Clutching and gear shifting are integrated, namely gear shifting and clutching share one operating handle; two actions generated by the gear-shift and clutch components are organically combined with the speed reducer; and the winch speed reducer gear automatically carries out separation and mesh. The winch gear-shift clutch has the advantages of convenient and reliable operation, compact structure, low fault rate and long service life.

The invention discloses a shift register unit, a shift register, an array substrate and a display device. The shift register unit comprises a level control module, wherein the level control module is connected with a grid signal generating module and comprises a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor and a fifth thin film transistor; the drain electrode of the first thin film transistor is respectively connected with the source electrode of the second thin film transistor and the grid electrode of the fourth thin film transistor; the grid electrode of the second thin film transistor is connected with the grid electrode of the third thin film transistor; the drain electrode of the third thin film transistor is respectively connected with the source electrode of the fourth thin film transistor and the grid electrode of the fifth thin film transistor; and the source electrode of the fifth thin film transistor is respectively connected with the drain electrode of the second thin film transistor and the source electrode of the third thin film transistor. According to the invention, when the shift register unit is not selected, the level of a grid line can be kept in a low state, and thus the service life of the shift register is ensured.

The invention discloses an electric vehicle waste heat utilization variable-frequency thermal pump air conditioning system and a method thereof. The electric vehicle waste heat utilization variable-frequency thermal pump air conditioning system comprises a low-pressure-stage variable-speed horizontal vortex compressor driven by an internal alternating current motor, a high-pressure-stage compressor, an internal heat exchanger, an external heat exchanger, an internal fan, an external fan, a intercooler, a waste heat recovering loop and the like, wherein the waste heat recovering loop consists of a waste heat recovering radiator, a waste heat discharging radiator, an electric water pump, an electric element water cooling device and the like; the waste heat recovering radiator is arranged in front of the external heat exchanger; in a heating cycle, the temperature around the external heat exchanger is raised through heat discharged by the waste heat recovering radiator, so that the working condition of a thermal pump is improved. By adopting the system, cooling in an optimal way in summer and single-stage heating under a general working condition and dual-stage heating under a low-temperature condition in winter are realized for an electric vehicle; meanwhile, the waste heat of electric elements on the electric vehicle can be used for melting frost on the external heat exchanger, so that the running condition of an air conditioner during heating is improved, and the running efficiency of the air conditioning system is increased.

The invention discloses a high-speed circular type color 3D printer. The printer comprises a workbench and an annular belt arranged on the workbench. Multiple nozzle assemblies are installed on the outer wall of the annular belt and provided with multiple spraying pipes. The spraying pipes contain multiple kinds of liquid printing materials comprising white substrate materials and multiple kinds of colorful materials. During the one-time movement, the spraying pipes work respectively, print an image through the white substrate materials firstly, especially the area in deep color in the image, and then print the colorful part of the image through the colorful materials, the upper part area of the finally formed image protrudes outwards, the stereoscopic impression of the image is improved, and the image is more vivid. Meanwhile, the printing speed is world-leading, printing is more rapid, efficient and flexible, and the printer is especially suitable for large-batch production.

The invention relates to grinding equipment, in particular to finished product grinding equipment for a plastic die and aims at achieving the technical purpose of providing the finished product grinding equipment for the plastic die, wherein the finished product grinding equipment for the plastic die is good in grinding effect, easy and convenient to operate and short in spent time. To achieve theabove technical purpose, the finished product grinding equipment for the plastic die is provided and comprises landing legs and the like. A moving mechanism is arranged on the tops of the left landing leg and the right landing leg, and a first supporting plate is connected to the middle portion between the left landing leg and the right landing leg, and a moving component of the moving mechanismis provided with a grinding mechanism. Through cooperation of the moving mechanism and the grinding mechanism, the surface of a plastic finished product placed on the first supporting plate is ground,and meanwhile a cleaning mechanism is utilized. Through optimization of a fixing adjusting mechanism and an auxiliary mechanism, the effects that the grinding effect is good, operation is simple andconvenient, and spent time is short are achieved.

The invention discloses and provides a wireless palm size color ultrasound instrument, and belongs to the field of medical apparatuses and instruments. The instrument can transmit real-time imaging signals through wireless signals and is clear in imaging, rapid in imaging, precise in imaging and wide in detecting object range on the basis of the instantaneous elasticity imaging technology. The wireless palm size color ultrasound instrument comprises a body and a replaceable probe arranged on the top of the body in a matched mode. An ultrasonic transmitting module and an ultrasonic echo collecting module are arranged inside the replaceable probe. A probe data connecting module, an elastic imaging processing module, a data imaging module and a wireless transmission module which are electrically and sequentially connected inside the body. The probe data connecting module is electrically connected with the ultrasonic echo collecting module. The wireless transmission module is connected with an external displayer through a wireless signal.