47results about How to "Effective power" patented technology

The invention discloses a micro-motion function and hydraulic brake control system of a wheeled dozer, and belongs to the field of wheeled dozers. The micro-motion function and hydraulic brake control system comprises an oil tank, an oil suction filter, a gear pump, a high-pressure filter, a prefilling valve, a micro-motion oil cylinder, a left pedal valve, a pressure switch, a brake valve set, a right pedal valve, a shuttle valve set, a rear axle brake, a front axle brake and a parking brake. Through the left pedal valve (micro-motion function pedal valve), a driver can effectively control tire drive force by combining the condition that the tire drive force ranges from 0 percent to 100 percent, wheel slipping is avoided, tire abrasion is reduced, and therefore engine power can be effectively utilized, oil consumption can be reduced, and circulating speed can be improved. According to the micro-motion function, the tire drive force is effectively controlled, meanwhile, emergency braking can be achieved through a service brake, and the reliability and running safety of a brake system are obviously increased. Main elements of the control system are integrated on the brake valve set, pipe connection is simplified greatly, and pipe arrangement is more reasonable.

The invention provides a longitudinal gallium nitride-based heterojunction semiconductor device and a manufacturing method thereof. The device comprises a substrate, a metal layer and a longitudinal gallium nitride-based heterojunction, wherein the longitudinal gallium nitride-based heterojunction is located at a GaN side of the heterojunction and comprises a longitudinal two-dimensional electron gas; and the longitudinal two-dimensional electron gas serves as a current channel from the surface to the bottom surface when the device is switched on. The method comprises the following steps: depositing unintentionally doped gallium nitride buffer layer on the surface of the substrate; etching the unintentionally doped gallium nitride buffer layer by a lithography mask; depositing an aluminum gallium nitride barrier layer to form the longitudinal gallium nitride-based heterojunction; and forming a metal layer on the surface by the lithography mask. The device chip provided by the invention can provide relatively high and effective power per unit area, so that the product has relatively good cost performance; and the manufacturing method is simple and easy to achieve.

The invention discloses a control method and system for gasoline engine excess air coefficient combustion. The control method for gasoline engine excess air coefficient combustion comprises the steps that the operation condition of an engine is monitored; the current load state of the engine is judged according to the operation condition of the engine, wherein load states of the engine comprise the partial load state, the large load state and the full load state; a matched excess air coefficient combustion mode is selected according to the current load state of the engine, wherein a lean combustion mode with the excess air coefficient being 1.6-2.0 is adopted for the engine when the current load state of the engine is the partial load state; a combustion mode with the excess air coefficient being 1 is adopted for the engine when the current load state of the engine is the large load state; and a combustion mode with the excess air coefficient being 0.8-0.9 is adopted for the engine when the current load state of the engine is the full load state.

The invention provides a method and device for selecting a motor system. The method comprises the following steps of: acquiring a first corresponding relation between various types of power and the rotating speed according to the running condition of an electric automobile; acquiring a second corresponding relation between various torques and the rotating speed according to the running condition of the electric automobile; detecting a first high-efficiency area from the first corresponding relation; detecting a second high-efficiency area from the second corresponding relation; and comprehensively considering selection of the motor system according to the first high-efficiency area and the second high-efficiency area. In the invention, a motor system with a higher matching degree can be selected, so that the motor system can be used for supplying power more effectively in the running process of the entire automobile under different working conditions, more energy is saved, and the driving range of the entire automobile is increased; and under the extreme working condition, motor heating is reduced, so that the service life of a motor battery is prolonged.

The invention discloses a high-voltage and high-power uninterruptible power supply device which comprises a central control unit, a high-voltage switch cabinet, a high-voltage phase shift voltage transformation device, an uninterruptible power supply module unit, a high-voltage inversion transformer and a high-voltage metering control cabinet, wherein the central control unit is connected with the high-voltage switch cabinet, the uninterruptible power supply module unit and the high-voltage metering control cabinet; and the high-voltage switch cabinet, the high-voltage phase shift voltage transformation device, the uninterruptible power supply module unit, the high-voltage inversion transformer and the high-voltage metering control cabinet are sequentially connected with one another. With the high-voltage and high-power uninterruptible power supply device, the effect of uninterruptible power supplying for a key high-voltage and high-power electricity utilization occasion under industrial large production is achieved; and uninterruptible power supplying for 5-15 minutes is supplied to a key industrial load which outputs 10KV high voltage and has 1,250 KVA capacity.

The invention discloses a cable collecting and releasing mechanism of a feed cabin of a radio telescope, wherein the feed cabin is hung at the upper part of an antenna through a plurality of suspended cables, the suspended cables bypass the tops of a plurality of supporting towers and are connected with a cable rolling mechanism; the feed cabin is connected with a cable, and through the driving of the cable collecting and releasing mechanism, the cable can be collected and released while the suspended cables move in and out. The cable collecting and releasing mechanism comprises a plurality of detachable rope clips that can be connected with the suspended cables in a cohesion manner or in a disconnected manner, wherein the cable is fixed with the detachable rope clips; one end of a drawing steel wire rope is fixed with the detachable rope clip which is far from the final end of the feed cabin, and the other end thereof is connected with the feed cabin; the detachable rope clips are sequentially connected in series and fixed on the drawing steel wire rope; a cable storage device is arranged around the periphery of two opposite supporting towers, and the detachable rope clips can be stored in the cable storage device; and the supporting tower is provided with a detaching device. The cable collecting and releasing mechanism can effectively protect the cables in the moving process of the feed cabin, thereby prolonging the service life of the cables and improving the stability and convenient maintenance of the mechanism.

The invention discloses a power circuit which comprises a power detection unit, a control unit and a switching unit, wherein the power detection unit is used for detecting whether a plurality of power supplies, including a green power supply, are provided to the power circuit or not and also detecting a power value provided by the green power supply; in addition, the control unit is electrically coupled to the power detection unit and a load so as to detect the electricity consumption power of the load and output a switching signal to the switching unit according to the electricity consumption power of the load and the detection result of the power detection unit. Therefore, the switching unit can select the green power supply and at least one other power supply to supply the electricity to the load if necessary according to the switching signal.

The invention relates to a parallel fuel cell electric power system. The parallel fuel cell electric power system comprises multiple groups of fuel cell electric power modules and a direct current bus, wherein each fuel cell electric power module includes a fuel cell stack, a current switch and a countercurrent protection component; the direct current bus is in an electric connection with output terminals of the fuel cell electric power modules and makes all the fuel cell electric power modules in parallel to effectively combine fuel cell stacks with a fixed power capacity into fuel cell stack groups so as to provide voltages with different power output for load usage.

The invention discloses a power coupling system integration device. A separation clutch and a motor stator and rotor are highly integrated with an outer clutch hub of a first clutch and a transmissionshaft of a first clutch, and through a casing sealing cover plate, it is ensured that lubricating oil liquid in a whole system is sealed in a sealed chamber composed of the casing sealing cover plateand a transmission front casing. The separation clutch ensures engagement and separation and lubrication through a pressure oil line and a lubricating oil line which are disposed on the transmissionshaft of the first clutch, so that power from an engine is effectively transmitted. The motor stator and rotor are cooled through a cooling water jacket and lubricating oil passing through the separation clutch, the first clutch and a second clutch, and the cooling effect is ensured. According to the power coupling system integration device, through a highly integrated design, a power coupling system device and the double clutches are integrated in the transmission front casing. The axial dimension of the entire transmission is effectively shortened, and all functions required by a hybrid power are achieved. The invention also discloses a hybrid vehicle.

Provided is a manufacturing method of a vertical device with a GaN epitaxial layer growing on a silicon substrate. The method includes following steps: growing an AlN layer, an AlGaN layer, an N+_GaN layer, an N-type GaN epitaxial layer, and a P-type GaN epitaxial layer on a silicon single-crystal substrate in sequence; etching the P-type GaN epitaxial layer to form grooves; injecting silicon-ion N-type doping agent to convert a P-type region to an N-type region; forming an interlayer dielectric at the outermost surface of the epitaxial layer, and forming contact hole mask opening pores in the interlayer dielectric; forming an emitting region metal cushion layer and a terminal region field plate; thinning the silicon single-crystal silicon substrate, and perforating the back surface of the silicon substrate; etching a silicon surface exposed by the silicon substrate to form deep grooves; and filling in the grooves with metal, and metalizing the back surface of the silicon single-crystal substrate as a back electrode of the device. According to the manufacturing method of the vertical device, the device dimension and the manufacturing cost are reduced, and the device with the vertical structure can provide higher and more effective power and better cost performance.

The invention is applicable to the technical field of electric loaders, and provides an electric engineering mechanical hybrid power supply type electric control management system. The system comprises a power generation device, a battery system, a five-in-one controller and a whole vehicle controller, and the battery system comprises a low-voltage power supply system and a high-voltage power supply system; the power generation device comprises an engine, a generator and detection systems, the detection systems are connected with the generator and the whole vehicle controller correspondingly,the detection systems comprise the heavy load detection system, the medium load detection system and the light load detection system, and all the detection systems are connected with the battery system and the generator; the whole vehicle controller is connected with the five-in-one controller, and the generator and the battery system are connected with an oil pump motor and a traveling motor through a motor controller; and the battery system, the five-in-one controller and a pump motor controller are connected with one another through a CAN transmission system and a low-voltage transmission signal. The system can effectively control the traveling motor and the oil pump motor, reduce the power consumption and improve the working efficiency.

The invention discloses a special vehicle power system based on a dual-end output work / traveling driving motor. The special vehicle power system comprises a vehicle control unit, a main driving motor and its controller, a driving / traveling driving motor and its controller, a first clutch transmission device, and a second clutch transmission device; the vehicle control unit controls the coordinating work of the whole power system, and the main driving motor is connected to a main driving shaft walking device; during the work, the driving / traveling driving motor is used as a working driving device; when the vehicle accelerates and climbs, the driving / traveling driving motor can also be used as an assistant driving device; first and second clutch input disks in the first and second clutch transmission devices are respectively installed at both ends of the output shaft of a work / traveling driving motor rotor, a first driven shaft is connected to a working device and a second driven shaft is connected to an assistant driving shaft traveling device; the system can realize the functional conversion of the assistant driving traveling and work of the work / traveling driving motor; on the basis of ensuring the dynamic property of the whole vehicle, the system can reduce the power of the main driving motor and optimize the vehicle energy utilization rate.

The invention discloses a double protective fence in the middle of a road. The double protective fence in middle of the road comprises a plurality of pairs of stand columns, corrugated fence inner plates and corrugated fence outer plates; the lower ends of the stand columns are fixed to a road surface; a buffering frame is connected between each pair of stand columns; buffering blocks are fixedly connected to the side wall of the upper end of each stand column; the corrugated fence inner plates are transversely distributed on the two sides of the pairs of stand columns, and are fixedly connected with the buffering blocks at the same time; the corrugated fence outer plates are arranged on the outer sides of the corrugated fence inner plates side by side; and a plurality of compression springs are connected between the inner side faces of the corrugated fence outer plates and the outer side faces of the corrugated fence inner plates. The double protective fence in middle of the road has high protecting performance, a vehicle cannot directly break the double protective fence in middle of the road easily in a rushing manner, meanwhile, good buffering performance is also achieved, it is guaranteed that no serious damage is caused easily after the vehicle rushes into the double protective fence in middle of the road, and the survival rate of personnel in the vehicle is increased.

The invention provides a lithium battery pack fixing structure, comprising a box body of which upper part is an opening structure. A square lithium battery array is set in the box body. Side frames are fixedly set on circumference side walls of the box body, are inward convex and resist against peripheral faces of the integrated square lithium battery group. The circumference side faces of every two square lithium batteries are set closely, thereby realizing circumference positioning of the square lithium batteries. The two side frames are set up and down in parallel and enclose the upper andlower positions in the height direction of the square lithium battery group. The lithium battery pack fixing structure also comprises an insulated positioning cover plate which covers the upper ends of the square lithium batteries which are set in an array mode. The square lithium batteries are compressed through adoption of a compression frame of which two ends are connected with two inner side walls in the length direction of the box body and the insulated positioning cover plate, thereby realizing upper and lower positioning of the square lithium battery group. The device is simple in structure, is convenient and fast in mounting operation, is convenient for mounting and storage, is reasonable in design and compact in structure and has a good market prospect.

A micro-needle transdermal drug delivery system based on micro-piezoelectric pump thermal driving coupling accurate control comprises a micro-piezoelectric pump, a pipeline, a circular-truncated-cone-shaped hollow micro-needle, a wire, a power source, a first drug storage cavity and a second drug storage cavity. The micro-piezoelectric pump is composed of a piezoelectric vibrator and a micro-piezoelectric pump cavity; a V-shaped liquid inlet hole is formed in the side portion of the micro-piezoelectric pump cavity; and a Y-shaped liquid outlet hole is formed in the bottom of the micro-piezoelectric pump cavity. According to the micro-needle transdermal drug delivery system based on micro-piezoelectric pump thermal driving coupling accurate control, the flow of liquid medicine can be accurately controlled, the conical valveless inlet (V-shaped) outlet (Y-shaped) liquid hole can prevent a large amount of liquid medicine from flowing back, the speed of the liquid medicine entering the micro-needle end can be increased; the circular-truncated-cone-shaped hollow micro-needle is adopted; the needle tip can be prevented from being broken and left in a living body; and the piezoelectric plate and the metal heating structure are matched to control the micro-piezoelectric pump, so that the pump works stably, and the dosing efficiency can be ensured.

The invention provides a fresh air system, further provides a central air conditioner, and further provides a control system and method of the fresh air system. The fresh air system includes an air supply system and an air exhaust system, an inlet of an air inlet duct of the air supply system is provided with a first valve, an electric flame nozzle is arranged in an air flow channel between a fanand an air supply duct or arranged in the air supply duct, and the included angle between the spraying direction of the electric flame nozzle and the air flow direction at a nozzle body of the electric flame nozzle is less than or equal to 90 degrees; and an outlet of the air exhaust duct communicates with the air inlet duct and is provided with a second valve which can be opened and closed. Afterexternal circulation is adjusted into internal circulation, formaldehyde, benzene and the like in the air are oxidized, and bacteria, viruses and the like are further killed in large quantities, so that in addition to the heating function, the fresh air system further integrates the functions such as degradation of the formaldehyde, the benzene and the like and sterilization and disinfection, andthe efficiency of degradation of the formaldehyde is greatly improved by more than one time compared with that of conventional catalytic oxidation. In addition, the central air conditioner further has similar functions.

The invention discloses an industrial tape cutting device. The industrial tape cutting device comprises a baseplate, a No.1 strut and a No.2 strut, wherein the No. 1 strut and the No. 2 strut are fixed to two ends of the top of the baseplate through fixing parts; a tape placing groove is formed between the No.1 strut and the No.2 strut; one side of the tape placing groove is fixed on one side of the No.1 strut through a bearing, and a transmission bar is fixed on the other side of the tape placing groove through a bolt; the outer side of the transmission bar is fixed on one side of the No.2 strut through a bearing; a connecting rod is fixed to one end of the transmission bar through a bolt and located on the other side of the No. 2 strut; and the other end of the connecting rod is connected to a handle through a rotating shaft. The industrial tape cutting device drives a cutting blade to cut by means of a servo motor through a lead screw, is simple in structure and convenient to operate, is endowed with such functions as counting, air purification and the like and is suitable for popularization.

The present invention relates to a home appliance in which an internally provided accommodation space can be observed from the outside through a perspective window without opening a door. In the home appliance of the present invention, a perspective window is mounted to a door, and when a user knocks on the door, the interior of an accommodation space is illuminated by detecting a knocking input by the user, so that the interior of the accommodation space can be observed from the outside through the perspective window. Thus, a user can observe the internal accommodation space through a simple action without opening the door.

The invention discloses a pump body and a double-screw pump. The pump body comprises a sleeve body and a main body, wherein two communicating hole cavities are formed in the sleeve body for installingtwo screws; a rectangular cavity is formed in the main body, and the sleeve body is located in the rectangular cavity; the main body has a rectangular shape; and a liquid inlet, a liquid outlet and avalve mounting port which communicate with the rectangular cavity are formed in the surface of the main body. Due to the fact that the rectangular cavity is formed in the main body, the volume in thecavity is increased, the draft amount of the cavity is increased accordingly, enough liquid flow can be provided under the transmission action of the two screws, and the power of the pump is effectively improved.