71results about How to "Avoid meshing" patented technology

The invention discloses an aircraft full-automatic aerodynamic optimization method based on reinforcement learning and transfer learning. The method is used for solving the problem that an existing pneumatic optimization method is prone to falling into local optimization or low in convergence speed, manual intervention is excluded in the final high-precision optimization stage through the optimization method, and the optimization efficiency is further improved. According to the technical scheme, firstly, a reinforcement learning environment based on semi-empirical estimation and high-precisionfluid simulation is established; a reinforcement learning neural network is constructed; a reward function is set, the global optimization capability of reinforcement learning is utilized; in the network training process, optimization experience is extracted from a semi-experience estimation method and stored in network parameters; then, another reinforcement learning neural network is constructed, migration learning is used for migrating the extracted optimization experience to the network, then the network is applied to aerodynamic optimization based on high-precision fluid simulation, andfinally, high-precision design parameters with excellent aerodynamic performance are obtained by training the network. Compared with a background technology method, the method has the advantages thatthe convergence speed is increased, the strong global optimization capability is realized, and the engineering value for high-precision pneumatic optimization is very high.

A drive unit equipped with an electric motor including an input shaft that is connected to an engine, an electric motor shaft, a counter output shaft, and a planetary gear set, wherein the input shaft and the counter output shaft are connected respectively, on one side of the planetary gear set, to two other elements which are different from an element with which the electric motor shaft is connected, an outer circumference of both edge portions of the counter output shaft is supported by a drive unit case, and an outer circumference of the input shaft is supported by an inner circumference of the counter output shaft by the drive unit case through the counter output shaft.

The invention provides a double-shaft balance device of an engine, which belongs to the technical field of mechanical engineering and resolves the technical problems of engine vibration and noise caused by vibration of the existing automobile. The double-shaft balance device of the engine comprises a driving gear fixed on a crank shaft and a first balance shaft and a second balance shaft which are arranged on the lateral side of the crank shaft and are parallel relative to a main journal of the crank shaft. The first balance shaft and the second balance shaft are respectively provided with a tooth portion, a shaft portion and a balance portion. The balance portion is arranged between the tooth portion and the shaft portion, and the weight of an area on one side of the balance portion relative to a radial line of the tooth portion is smaller than the weight of an area on the other side. The tooth portion of the first balance shaft is meshed with the tooth portion of the second balance shaft, and the tooth portion of the first balance shaft is meshed with the driving gear. The balance portion of the first balance shaft and the balance portion of the second balance shaft are symmetrically arranged relative to the meshing face of the first balance shaft and the second balance shaft. The double-shaft balance device facilitates integral machine arrangement and has the advantages of being compact in structure and small in size and saving cost.

The invention provides a converter transformer electric-thermal coupling field calculation method based on an improved meshless method. The method includes the steps that a mathematical nonlinear model of extreme high voltage converter transformer insulating oiled paper materials is determined, and a two-dimensional axial symmetric nonlinear electric-thermal coupling field calculation model is determined; the improved meshless method is used for calculating a converter transformer electric-thermal coupling field, modes of model point distribution are adjusted through self-adaption according tosizes, and the electric field and temperature field of a converter transformer are calculated respectively; the sizes of local sub-fields are adjusted in the vicinity of calculation boundary areas toprevent the local sub-fields from intersecting with global boundaries, and the point distribution method is used for calculation on the global boundaries; in the coupling data transmission process between the electric field and the temperature field, when a thermal load of the temperature field needs to be calculated, the gauss integral points of the local sub-fields of the temperature field andthe local sub-fields in an electric field calculation model are searched for according to geometric coordinates, and the thermal load is obtained according to the node number interpolations in the local sub-fields; electric field material properties are updated, and the iterative calculation and the distribution law acquisition of the converter transformer electric-thermal coupling field are obtained. The method improves calculation time and accuracy.

The invention discloses a polishing machine. The polishing machine comprises a machine shell (7) and a head shell (1) arranged at the top end of the machine shell (7), wherein a high-power-density brushless motor is arranged in the head shell (1); a controller (5) of the high-power-density brushless motor is arranged in the machine shell (7); the high-power-density brushless motor comprises a rotor shaft (2) rotationally arranged on the head shell (1), and the rotor shaft (2) and a driving shaft of a polishing rotary disc (6) of the polishing machine are coaxially arranged and are of an integrated structure. The axis of the rotor shaft (2) is perpendicular to the operation surface of the polishing rotary disc (6) and passes through the circle center of the polishing rotary disc (6). According to the polishing machine, the service life of the device is prolonged, generation of carbon powder is avoided, and environmental pollution is avoided. A transmission device is arranged in the machine shell, the service life is prolonged, energy consumption is lowered, output efficiency is improved, and noise and vibration are lowered. The trouble of engagement installation of transmission gears is omitted, the size and weight of the polishing machine are effectively reduced, and the polishing machine can be assembled conveniently.

The invention discloses a percussion drill. The percussion drill comprises a case; a supporting part and a high power density brushless motor erected on the supporting part are arranged in the case; a controller of the high power density brushless motor is arranged in the case; the high power density brushless motor comprises a rotor shaft rotationally arranged in the supporting part; a chuck of the percussion drill is fixed at one end of the rotor shaft; an impact movable gear is arranged at the other end, far from the chuck, of the rotor shaft; and an impact static gear, arranged corresponding to the impact movable gear, is arranged in the case. According to the percussion drill provided by the invention, the service life of the percussion drill is prolonged; the generation of carbon powder is avoided, and environmental pollution is avoided; and a transmission apparatus arranged in the case is avoided, so that the service life of the percussion drill is prolonged, the energy consumption is reduced, the output efficiency is improved, the noise and the vibration are reduced, the trouble in engagement installation of the transmission gears is avoided, the volume and the weight of the percussion drill are effectively reduced, and convenience is brought for the assembling of the percussion drill.

The invention discloses a method for removing magnetic resonance head image motion artifacts.. Non-reference image qualitative assessment indexes QITV in the method are used for reflecting image quality. The method comprises the steps of constructing k space data after sampling each time through contraction perception, calculating QITV value of reconstructed images, by observing the change trend of the image QITV value, finding the time when patients make motion in the magnetic resonance screening process, and using k space data without motion to reconstruct contraction perception so as to optimize fully-collected motion artifact images. The image quality of the magnetic resonance motion artifacts can be effectively improved, so that clinical application of magnetic resonance images can bepromoted.

The present invention relates to a transmission device for circuit breakers for transmitting a torque from a manually operated manually activate, deactivate and / or induction of actuating means on a driven transmission shaft to activate, deactivate and / or induction of the compact circuit breaker, wherein the transmission device includes the drive shaft and at least two transmission devices meshed together, and the first transmission device the first rotatable drive shaft is arranged in the delivery device and the second transmission connects with the drive shaft during transmitting the torque and is movable relative to the first transmission is arranged in a trennposition. The present invention also relates to a operating gear to enable, disable and / or cause a compact circuit breaker and circuit breakers.

The present invention relates to a gear-change device ( 1 ) comprising a transmission housing ( 2 ), at least two neighboring gear shafts ( 3, 4 ) arranged in the transmission housing, and a respective gear-change sleeve ( 5, 6 ) per gear shaft ( 3, 4 ), wherein at least one locking element ( 7; 8 ) is arranged on a guide means ( 9 ) supported on the transmission housing ( 2 ), and by displacement of one ( 5 ) of the gear-change sleeves ( 5, 6 ) the respectively other one ( 6 ) of the gear-change sleeves ( 5, 6 ) is locked against an axial displacement on the gear shaft ( 4 ) thereof out of the neutral position.

The invention relates to a washing machine speed reducing clutch control method, a speed reducing clutch and a washing machine. The control method includes that step 1, a mainboard receives a washing or dewatering signal, and a clutch motor is controlled to drive a clutch to move axially; step 2, whether the clutch is meshed in place or not is detected, after the clutch motor runs in place, if a signal indicating that the clutch is meshed in place is detected by the mainboard, a driving motor is controlled to change rotating speed to washing or dewatering rotating speed, and if the signal indicating that the clutch is meshed in place is not detected by the mainboard, the driving motor is controlled to be in forward-backward reciprocating motion within a set rotating speed range to promote meshing of the clutch.

The invention relates to a rib rolling machine, and in particular relates to an automatic rib rolling machine which belongs to the field of manufacturing of filter devices. The automatic rib rolling machine is characterized in that a first transmission shaft (4) and a second transmission shaft (7) are fixedly arranged through fixed plates (6) installed on a base (5); the end, far from a second gear (8), of the second transmission shaft (7) is connected with a convex die (9), and the end, far from a first gear (3), of the first transmission shaft (4) is connected with a concave die (10); and the convex die and the concave die correspond to each other. The concave die is in a secondary advanced cam-like structure. With the adoption of a motor, through gear reduction, the two transmission shafts drive the convex and concave dies to rotate, and manual regulation is replaced by changing the radius of the concave die. In the anticlockwise rotating process, the convex and concave dies pass through a first semi-circle and a second semi-circle in sequence, a workpiece is prevented from being torn due to excessive rolling at one time. The two transmission shafts are fixedly arranged, so that the gear engagement problem is effectively avoided, the time is saved, and the labor intensity of workers is greatly reduced.

The invention discloses a marble cutting machine comprising a housing (7) and a motor casing (1) arranged in the housing (7) and fixed on the side wall of the housing (7); a high power density brushless motor is arranged in the motor casing (1), and a controller (5) thereof is arranged in the housing (7); the high power density brushless motor comprises a rotor shaft (2) arranged in the motor casing (1) in a rotary manner; the rotor shaft (2) is coaxially arranged with a drive shaft of a marble cutting blade (6) of the marble cutting machine so as to form an integrated structure; the axis of the rotor shaft (2) is perpendicular to the plane on which the marble cutting blade (6) is located, and penetrates the center of the marble cutting blade (5). The marble cutting machine can prevent carbon dust generation and environment pollution, can improve life and reduce energy cost, can improve output efficiency and reduce noises and vibration, can prevent transmission gear engagement installation complexity, can reduce size and weight, and the marble cutting machine can be conveniently assembled.

The invention relates to a disc type overload protection anti-impact speed reducer. The disc type overload protection anti-impact speed reducer comprises a box body, a worm wheel, an output shaft anda worm. A hollow shaft cavity is formed in the input end of the worm, the outer circumference of the hollow shaft cavity is supported on the box body through a bearing, the outer end of an input shaftis supported on the box body through a bearing, the inner end of the input shaft is coaxially rotationally supported in the hollow shaft cavity through a shaft sleeve or a bearing, multiple parallelcopper friction plates penetrate through the inner wall of the hollow shaft cavity through splines, multiple parallel steel friction plates penetrate through the input shaft through splines, the copper friction plates and the steel friction plates are sequentially attached alternately, an opening of the hollow shaft cavity is in threaded screwed connection with a pressure adjusting nut penetratingthrough the input shaft, and a disc spring abuts against the position between the inner end of the pressure adjusting nut and the steel friction plate or the copper friction plate at the outermost end. The disc type overload protection anti-impact speed reducer is compact in structure and convenient to adjust, protection of input impact and drive overload can be effectively taken into consideration, and the service safe life of the structure is guaranteed.

The invention relates to a rotatable fixing device for lighting equipment. The lighting equipment is provided with a fixedly arranged assembling ring (1) and a rotatable ring (2) which rotates relative to the assembling ring (1). The rotatable fixing device is provided with a first disc (3) which is connected with the rotatable ring (2) in an anti-torsion way and a second disc (4) which is connected with the assembling ring in an anti-torsion way, wherein the first disc (3) and the second disc (4) is respectively provided with a first tooth part (5) and a second tooth part (6). The locking of the rotating angle of the lighting equipment is realized through the engagement between the first tooth part (5) and the second tooth part (6), and the adjustment of the rotating angle of the lighting equipment is realized through the disengagement between the first tooth part (5) and the second tooth part (6). By using the rotatable fixing device, the lighting equipment can be reliably fixed at a preset illumination angle and the service life of the entire lighting equipment is not reduced when the times of angle adjustment are increased. Besides, the invention additionally relates to the lighting equipment with the rotatable fixing device.