64results about How to "Reduce speed loss" patented technology

The invention discloses an electrical locomotive auto-passing neutral section control system. In the control system, a signal generator used for transmitting passing neutral section anticipating signal is arranged on a vehicle mainframe of an electrical locomotive, wherein the vehicle mainframe comprises a signal receiver used for receiving the passing neutral section anticipating signal, a memory unit used for storing the required time of locomotive neutral section operation, a clock, a speed sensor used for providing the current speed of the electrical locomotive for a controller, the controller used for outputting passing neutral section control signal and restoring the control signal and a contact network connection controller used for controlling a contact network electrical connection device. The timing that the invention executes the auto-passing neutral section operation is accurate and the reliability of the auto-passing neutral section control is high.

The invention is applicable to the railway electric locomotive field, and provides an automatic neural section passover control method of an electric locomotive, a device thereof, and the electric locomotive. An RF locator card is arranged on an overhead contact, an RFID location reader is arranged on a roof and used for identifying the RF locator card, a vehicle host computer calculates and calibrates distance between the locomotive and a front section card or a phase point prediction card according to location information of the RF locator card collected by the RFID location reader on the top and kilometer post data read by the vehicle host computer from a TAX box as well as current speed of the locomotive, and performs on/off blockout control with the location information of the RF locator card as main means and the kilometer post data as supplementary means in a neural section passover area so as to ensure optimal blockout position from calculation output and reduce speed loss, meanwhile, the dual locating technology also ensures safety and reliability of the automatic neural section passover of the electric locomotive, avoid missed neural neutral section detection, and provide convenient installation and maintenance.

The invention relates to a boost phase generalized standard miss distance analysis guidance method. The method comprises steps that 1, boost phase guidance problem modeling is carried out, including standard ballistic movement modeling, guidance correction first-order perturbation modeling and terminal constraint modeling; 2, boost phase standard ballistic regular perturbation solution modeling is carried out; 3, boost phase standard ballistic zero-order item analysis solution on the basis of regular perturbation is carried out; 4, boost phase standard ballistic first-order item analysis solution on the basis of regular perturbation is carried out; and 5, boost phase optimal guidance instruction solution on the basis of the standard miss distance is carried out. Through the method, zero-incidence is taken as boost phase ballistic standard control, analysis solution is carried out by employing a regular perturbation method, and thereby an analyzed standard miss distance is acquired; an optimal control method is employed to solve a guidance instruction of the correction standard miss distance, and thereby a non-linear analysis optimal guidance method satisfying boost phase task demands is acquired.

The invention discloses a comprehensive compensation system for a Vv wiring traction substation with out-of-phase and in-phase compatibility. On the secondary side of a traction substation, both a leading phase (T1-N) and a lagging phase (T2-N) supplies a traction load with power. The direct current sides of a first static var generator (SVG1) and a second static var generator (SVG2) are arranged in a back-to-back way, the alternating current sides of the SVG1 and the SVG2 are respectively connected with the leading phase (T1-N) and the lagging phase (T2-N) of a Vv traction transformer, the comprehensive compensation system which is compatible with out-of-phase and in-phase structures and easily develops and transforms from an out-of-phase mode to an in-phase mode is formed so as to generate a negative sequence power flow opposite to the traction load, and reactive compensation and harmonic suppression are combined through reasonable control. The application of the system is flexible, in-phase power supply is easy to realize, power phase splitting at the exit part of the traction substation is cancelled, and power supply bottleneck is eliminated.

The invention provides an atomization apparatus capable of lessening the unevenness of the entire patterned region at the time of spraying and accordingly making the coating thickness distribution uniform in the coated face and easily forming a smooth coating free from disorder of the coating face in an air atomizing spray gun. The air cap is to be used in an air spray gun for atomization with compressed air and has a center air port composing a circular air port in the outer peripheral part of a center coating material jetting port, a pair of corner parts formed symmetrically in the outside of the center air port, and side air ports for forming spraying patterns by jetting air through the corner parts. In the air cap, the surface area of inlet parts of vertical holes formed in the respective corner parts and communicating with the side air ports is made smaller than the surface area of the side air ports. To make the inlet surface area narrower than the vertical hole surface area by narrowing the flow channel surface area, a bush is fitted or caulking is carried out in the circumference of the vertical hole inlets.

The invention provides a lubricating oil filtration system used for filtering and producing high-cleanness lubricating oil. According to the invention, comprehensive consideration is taken upon filtration device lubricating oil filtering core dirt holding amount, breakdown pressure and filtration area, and the properties are adopted as filtration material selection standards, such that lubricating oil filtering core incoming and outgoing flow rate decreasing range is controlled at 5-60%. Therefore, lubricating oil speed loss when the lubricating oil is being filtered is reduced, and lubricating oil filtering core filtration effect and efficiency are substantially improved.

The invention relates to an analytical guidance method for a standard control miss distance of a terminal guidance section. The analytical guidance method comprises the following steps: firstly, modeling the terminal guidance section; secondly, dividing a standard control trajectory at the terminal guidance section into a zero-order standard control trajectory and a first-order standard control trajectory according to a canonical perturbation theory; thirdly, performing analytic solution on a zero order item of the standard control trajectory at the terminal guidance section; fourthly, performing analytic solution on a first order item of the standard control trajectory at the terminal guidance section; and fifthly, acquiring a complete analytical solution of the standard control trajectory, and calculating a guidance command. The analytical guidance method disclosed by the invention has the advantages that firstly, an idea of taking a zero attack angle as standard control over the terminal guidance section of a homing missile is put forward, and a motion equation of the standard control trajectory is simplified; in addition, an attack angle required by guided correction is enabled to be located near zero, and speed loss brought by the guided correction is reduced; secondly, analytic solution is performed on a longitudinal trajectory at the terminal guidance section by adopting a canonical perturbation method, and high-precision analytical solutions of firing range, height, speed and trajectory inclination angle are obtained; and thirdly, a guidance method based on a generalized standard control miss distance is provided, and normal acceleration of the missile is greatly reduced; and meanwhile, the terminal attack angle is enabled to be converged to be zero.

The invention relates to a pantograph detection circuit, a ground split-phase passing device and a control method. The pantograph detection circuit comprises a boosting cable and a sensor. The boosting cable is used for sending current of a steel rail corresponding to the position where a pantograph is located into a return cable when the pantograph draws electricity through a contact line. The sensor is electrically connected with the boosting cable and is used for outputting a detection signal to the ground split-phase passing device when detecting that the electric signal in the boosting cable exceeds a signal limit value, the detection signal is used for indicating the position information of the pantograph. The sensor is connected into the boosting cable to detect the electrical signal in the boosting cable and output the corresponding detection signal to the ground split-phase passing device. The aim that the ground split-phase passing device can know the specific position of thepantograph is achieved, shortening the length of a neutral section is facilitated, the phase change power-off time of a train is shortened, the speed loss is reduced, and the running efficiency of the train is improved.

The invention relates to a wing for an axial-flow fan with tail-edge jetting in the technical field of impeller, which comprises an inputting pipe for the controlling gas, tail-edge jetting holes, a main gas passageway, branch gas passageways, diversion components, and the wing body. The inner of the wing body is a cavity, the main gas passageway and the branch gas passageways are in the cavity; the inputting pipe for the controlling gas is located outside the wing body; one end of the inputting pipe for the controlling gas is communicated with the main gas passageway, another end is communicated with the branch gas passageways; between the branch gas passageways, diversion components are provided. The tail-edge jetting holes are located at the tail edge of the wing body in equi-spaced way, the diameters of the tail-edge jetting holes are arranged in arithmetic progression along the tail edge of the wing body from the end with an inputting pipe for the controlling gas of the wing body to another end of the wing body. The invention fills the speed loss of the tail edge of the wing body, reduces the speed pulse at the tail area, reduces the interference from the downstream blades, and drops the interference noise.

A multi-group transmission of a vehicle is arranged in a drivetrain and includes traction force support during gearshift operations. A clutch mechanism, including a frictional clutch and two shifting clutches is arranged between a drive motor with a driveshaft and a transmission input shaft, such that the driveshaft can be connected to the transmission input shaft by one shifting clutch in a first shift position in combination with the frictional clutch or in a second shift position with bridging of the frictional clutch, such that the driveshaft can be directly connected to a main transmission shaft by the other shifting clutch in a shift position in active combination with the frictional clutch. In a method for operating the transmission, the frictional clutch is controlled and operated in combination with the first shifting clutch as a starting clutch and with the second shifting clutch as an intermediate-gear clutch.

A vehicle transmission having first and second transmission input shafts (GE1, GE2) and having at least three planetary gear sets (PG1, PG2, PG3). A sub-transmission (TG1, TG2) is allocated to each of first and second transmission input shafts (GE1, GE2) and one of first and second sub-transmissions (TG1, TG2) comprises at least the first planetary gear set (PG1), and the other of first and second sub-transmissions (TG1, TG2) comprises at least the second planetary gear set (PG2). To ensure that the vehicle transmission is economically manufactured and useful for both conventional and hybrid drive trains, a provision is that the transmission input shafts (GE1, GE2) be effectively connected or effectively connectable with the planetary gear sets (PG1, PG2, PG3), that it be possible to variably activate first and second sub-transmissions (TG1, TG2) for implementing multiple gears, and that one of the gears be shiftable as a direct-drive gear.

The invention discloses a quenching system and method for box-type workpieces, and belongs to the technical field of heat-treatment quenching equipment. According to the quenching system and method for the box-type workpieces, the quenching system comprises a quenching pool body, a stirring system and a hoisting system capable of hoisting the workpieces back and forth. Stirring devices are symmetrically mounted on the two sides of the interior of the quenching pool body from above. A guide device is arranged between the stirring devices and comprises a plurality of layers of guide plates whichare distributed symmetrically, and a liquid flow in a quenching pool is controlled by means of the thrust of propeller blades in the stirring system and quenching liquid channels formed between the multiple layers of guide plates. A circulating and cooling system is connected to the outside of the quenching pool. When the temperature of a quenching medium is higher than an upper limit of the optimal service temperature, the circulating and cooling system is started to realize circulation and cooling of the quenching liquid.

A foreship arrangement for a vessel of the displacement type. The foreship consists of the part of the ship in front of the vessel's midship mark and the vessel has a transversely symmetrical hull form about its center line and a substantially conventional bow form below its design water line, characterized in that the stem line of the vessel turns substantially backwards in relation to the length direction of the ship from a transition point at or immediately above the design water line.

The present invention provides a blowing device which can restrain the noise generated by the blades of a blowing fan. The blowing fan 4 is arranged in a shell 6 possessing an inlet 6a and an outlet 6b and is equipped with a plurality of fan blades 4a around a fan boss 4b. The front concave flanges 85 and the back concave flanges 86 are respectively formed at the blade front edges and the blade back edges of the fan blades 4a to reduce the fan noise. The adjacent spacing P1 of the concave parts 85a of the front concave flanges 85 is set to be greater than the adjacent spacing P2 of the concave parts 86a of the back concave flanges 86.

The invention provides a hybrid power high-speed rice transplanter and a steering method thereof. The hybrid power high-speed rice transplanter comprises a rice transplanter main machine, a power system and a walking system, wherein the power system is arranged on the rice transplanter main machine and drives the rice transplanter main machine to conduct rice transplanting operation; the power system comprises at least one engine and at least one electric energy generating device, wherein the engine drives the electric energy generating device to generate electric energy; the walking system isarranged on the rice transplanter main machine and comprises at least four vehicle wheels and at least four electric motors, wherein the electric motors drive the vehicle wheels to walk; and the electric motors drive the vehicle wheels on the left side and the right side to rotate at different kinematic velocity, and thus the steering of the walking system is realized.

The invention discloses a multifunctional transformer used for a traction transmission system. The multifunctional transformer comprises a high-voltage stage assembly connected into a traction network, wherein n stages of identical bridge-type power sub-modules are cascaded to form the high-voltage stage assembly; an isolation stage assembly, wherein the isolation stage assembly comprises more than one high-frequency modulation circuit and more than one high-frequency transformer, the high-frequency modulation circuits modulate a direct voltage converted by the high-voltage stage assembly into a high-frequency square-wave voltage, and the high-frequency square-wave voltage is coupled to two windings on a secondary side through the high-frequency transformers and is sent to an output stage assembly; and the output stage assembly, wherein the output stage assembly comprises a high-frequency H-bridge rectification circuit and restores the high-frequency square-wave voltage coupled by the high-frequency transformers to a high quality direct voltage for output, and the high quality direct voltage is output for providing energy to a traction inverter and an auxiliary inverter. According to the invention, the weight of a train is reduced, the size of the train is reduced, the vehicle operation performance and the rail capacity are improved, and the power grid electric energy quality and the electric energy utilization rate are increased.

The invention relates to a smoke dust suction device applied to laser surface decontamination. The smoke dust suction device comprises a shell and a rotating shaft, wherein a circular cavity is formed in the shell, and a first flow guide groove, a second flow guide groove and an air outlet are formed in the middle of the top, the middle of the front side and the middle of the bottom of the shell correspondingly; a plurality of first tangential air inlets and second tangential air inlets are formed in the air outlet ends of the first flow guide groove and the second flow guide groove at intervals correspondingly, the first tangential air inlets and the second tangential air inlets deviate from the axis part of the cavity, the rotating shaft is arranged in the cavity, and the two ends of the rotating shaft are rotationally connected with the shell correspondingly; and a first spiral brush and a second spiral brush are arranged at the two sides of the rotating shaft respectively, and the rotating directions of the first spiral brush and the second spiral brush are opposite. According to the smoke dust suction device, through the cooperative design of the shell and the rotating shaft, the problems that because dust in an existing adsorption pipe cannot be effectively removed, the suction capacity is reduced and the dust collection effect is affected are effectively solved.

The invention relates to the technical field of signal positioning monitoring, in particular to a positioning drift data filtering system and method for a vehicle, and the system comprises a data extraction module, a speed calculation module, an acceleration calculation module, a first judgment module, a second judgment module, a track generation module and a data collection module. A signal position drift point is judged according to the numerical relationship between the acceleration and a preset acceleration threshold value, or the actual situation of the position point is judged according to the change degree of the gyroscope and the comparison of the acceleration ax and ay of the triaxial accelerometer along the X axis and the Y axis, the state of the position point is judged, and finally a judgment result is sent. When the GSP position drift point is judged, the GSP position drift point is directly abandoned; and when a non-signal position drift point is judged, reporting is carried out, and data of the driving condition is collected. The method is used for accurately filtering the signal drift point and judging the actual driving condition corresponding to the data of the signal drift point.

The invention discloses an impeller type energy feedback suspension frame. The impeller type energy feedback suspension frame comprises an energy feedback turbine, buffers and a damping liquid oil way, wherein the buffers are arranged on suspension frame bodies on the two sides of a vehicle body correspondingly. The energy feedback turbine is internally provided with a tower-shaped impeller which is connected to a motor. The damping liquid oil way comprises a damping oil tank. A liquid drainage outlet of the energy feedback turbine is connected with the bottom of the damping oil tank through a guide pipe. Each buffer comprises a damping oil inlet and a damping oil outlet. Each damping oil outlet is connected with a liquid inlet of a liquid flow cavity through a one-way valve A. Each damping oil inlet is connected to the damping oil tank through a one-way valve B. According to the impeller type energy feedback suspension frame, traditional interconnection type energy feedback suspension frame oil ways are improved, the oil ways of the buffers on the two sides of the suspension frame are changed into a parallel structure, and meanwhile, energy feedback and resistance increasing control is conducted on the buffers on the two sides through the energy feedback turbine, so that energy feedback interconnection of the buffers on the two sides is achieved; and in addition, the invention further changes a traditional blade type impeller into a compression type impeller, the blade area is larger, and the conversion efficiency of the damping oil driving force is higher.