40results about How to "Continuously adjustable speed" patented technology

The invention discloses an active and passive realizing method of a healthy exercise trainer. When a trainer is in passive training, a control motor is in either a position mode or a speed mode, and upper and lower limbs are driven to exercise to finish the passive training through a training device; when the trainer is in active training, the upper and lower limbs of the trainer exert strength, the motor is set to be in a torque mode, and the motor is driven to rotate through the training device; and the trainer is in assisted training, a working mode of the motor is a combination of the torque mode and the position mode or the speed mode in the different time periods, the active and passive trainings can be achieved through the real-time switching of the control motor between the position mode or the speed mode and the torque mode. According to the active and passive realizing method of the healthy exercise trainer, the initiatives of the trainers who take part in the training can be improved, and either body builders or patients can autonomously regulate the training mode, speed and intensity according to their own physical conditions and physical abilities, so that the active and passive realizing method of the healthy exercise trainer can be suitable for the healthy training of different recovery stages and different psychologic statuses.

The invention provides a temperature-control high-speed large-strain membrane two-way stretching device and an experimental method thereof. A servo motor drives four #-shaped guide rails to move, and a membrane sample is stretched through a scissors mechanism. A high-pressure pneumatic clamp quickly clamps the sample and can realize pressure compensation. Two independent temperature control furnaces are respectively used for preheating the device and stretching the sample. A hot air circulating system can be adopted to realize rapid temperature rise of the control furnaces and also can ensure the temperature uniformity of cavities. Tension sensors are respectively mounted in two stretch directions and used for collecting stress-strain information in the membrane stretching process. The servo motor drives a ball screw so as to enable a stretch part to be switched among different stations. The temperature-control high-speed large-strain membrane two-way stretching device can realize two-way synchronous stretching, two-way asynchronous stretching, limited one-way stretching and unlimited one-way stretching, thus being a good device for simulating industrial membrane stretching processing and establishing the relationship between processing parameters and the membrane structure performance.

The present invention relates to the technical field of control of fume exhaust parts in household kitchen, and especially relates to a range hood intelligent control system. The system includes a one-key type touch control device, a main control module, a rotating speed control module, a PWM control module and a time setting module. The main control module is in signal connection with the one-key type touch control device, and is used for receiving operation command from the one-key type touch control device; the main control module is in control connection with the rotating speed control module, the PWM control module and the time setting module; and the rotating speed control module and the PWM control module are respectively electrically connected to a DC motor and a lighting lamp. The one-key type touch control device is provided with a switch button, a time setting button, a illumination brightness touch button, a touch sliding control strip and a display screen. Compared with the prior art, the invention has the advantages of simple structure, convenient operation, various control functions and good appearance. The invention also provides a one-key type range hood with the intelligent control system.

The invention discloses a debinding furnace and relates to the field of industrial furnaces, in particular to a drying debinding furnace for a ceramic ferrule for a photo-communication passive device. A hearth and a heating cavity welded by heat-resistant stainless steel plates are respectively formed in a mechanical frame; the hearth, the heating cavity, a hearth bottom plate and mesh plates on left and right sides of the hearth form an entire circulating air duct; an axial flow circulating fan is arranged inside the circulating air duct and is arranged on the right side of the hearth; and hot wind in the circulating air duct enters the hearth through the mesh plate on the right side of the hearth. The mesh plates are fixed on the left and right sides of the hearth; a slideway is fixed on a vertical steel bar of each mesh plate; the hearth bottom plate, the mesh plates on the two sides and the slideway are detachable; a hot-wind circulating system adopts an extremely-unique and timely air quantity-adjustable hot-wind circulating mode; the axial flow circulating fan regulates the speed by frequency conversion, the speed is continuously adjustable, the heat efficiency is greatly improved and the dead-space region is effectively reduced. A resistance wire has the characteristics of high material purity, stable performance, longer service life, high temperature resistance and corrosion resistance.

The invention discloses a multi-station rotating tooling device for plasma physical vapor deposition, and relates to the field of plasma spraying. The multi-station rotating tooling device consists four parts, including a revolution system, a rotation system, a control system and a supporting rack, wherein the revolution system consists of three parts, including an electric main shaft mechanism, arevolution frame mechanism and a revolution gear mechanism; the rotation system consists of two parts, including a universal joint mechanism and a rotation shaft mechanism. The device can implement single-shaft inputting and multi-shaft outputting, has revolution and rotation functions and can meet the use requirements for preparation of rotating surface coating layers of multiple rotating body parts; through the adoption of the tooling device with an angle, the spraying thickness of a workpiece is substantially improved, and uniform transition of a coating layer of a workpiece having a severely covered region or a region with a relatively large bending moment is achieved; the station setting of the device is reasonable and proper, and the mechanisms work stably and reliably; the thickness uniformity and consistency of a coating layer of a product can be strictly controlled; the multi-station rotating tooling device is particularly applicable to preparation of a coating layer on the surface of a turbine blade of a gas turbine engine; the production efficiency and the productivity are improved.

The invention provides a film bidirectional accurate stretching device. The device comprises a first driving motor, a transverse stretching mechanism, a longitudinal stretching mechanism and a tensionsensor, wherein the transverse stretching mechanism and the longitudinal stretching mechanism are horizontally and vertically arranged, each of the transverse stretching mechanism and the longitudinal stretching mechanism comprises a strip-pressing stretching mechanism and a plurality of point-pressing stretching mechanisms, the point-pressing stretching mechanisms are in relative sliding connection with the strip-pressing stretching mechanisms, the strip-pressing stretching mechanism of the transverse stretching mechanism and the point-pressing stretching mechanisms of the longitudinal stretching mechanism correspond to each other at the same time to act, and the point-pressing stretching mechanisms of the transverse stretching mechanism and the strip-pressing stretching mechanism of thelongitudinal stretching mechanism correspond to each other at the same time to act. According to the device, in the single-direction stretching operation, the defects that a stretched film is wide intwo ends and narrow in middle are avoided, the overall shape of the stretched film is preliminarily ensured, the stretching effect is guaranteed, the tensile thin degree is uniform, and the defect that the stretching point is uneven in thickness due to fixed point stretching by adopting point-pressing fixation in the prior art is avoided.

The invention relates to a high speed dust storm saltation test observation system, characterized in that a pressure regulating valve, an electromagnetic switch valve, a time control switch, a sand blasting gun and a sand supply device are commonly fixed on a work panel; a power device is successively in connection with the pressure regulating valve, the electromagnetic switch valve and the sand blasting gun through a flexible pipe; the time control switch is in connection with a power supply, and is respectively in connection with the power supply and the electromagnetic switch valve through leads; the sand port of the sand supply device is in connection with the sand supply device; a test platform is located between a saltation dust collector and the sand blasting gun. The system can simulate continuously adjustable stable wind conditions with a wind speed greater than 150 m/s, and accurately control wind speed and effect time, and has the characteristics of convenient operation, easy control, portable equipment, simple disassembly and convenient transfer; the system is suitable for test observation such as dust storm saltation observation, wind speed wind pressure, wind erosion and polishing, sediment transport, etc. under heavy wind conditions, and microscopic research such as particle speed, concentration, etc., and provides basic test equipment for dust storm motion rules and process research under special conditions.

The invention relates to a control method of a sectional warping machine. The method comprises the steps that a positioning control module, a speed control module and a tension control module are included, the positioning control module detects position information of a shaft through a shaft encoder on a drum shaft, and a central controller controls the rotation speed of a control servo motor according to the position information; the speed control module detects speed information through a thickness measuring sensor and the shaft encoder, the linear speed of warping is calculated according to the speed information, the linear speed is compared with a preset linear speed, and according to a numerical value obtained after comparison, the rotating speed of a direct-current drum motor is controller by triggering a pulse module. According to the method, accurate positioning and displacement and automatic adjustment of speed and tension can be achieved, fluctuation of yarn tension is lowered, and the phenomenon that due to the fact that warp yarns are mutually wound into knots and the pressure is unbalanced, the yarn quality is affected is avoided.

The invention relates to a method for continuously rolling a copper pipe through a planetary pipe mill, which is characterized in that a roller type feeder or a crawler type feeder is arranged at an inlet of a three-roller planetary pipe mill and is driven by a pipe blank rolled by the three-roller planetary pipe mill to be in a passive rotating state; the roller type feeder or the crawler type feeder passively rotates and continuously provides a feeding force for the pipe blanks at the same time, and the pipe blanks are continuously fed into the three-roller planetary pipe mill one by one in an end-to-end connection mode to be rolled. By the adoption of the technical scheme, the structure is simple, reliable and practical, the requirement for continuously rolling copper pipes is met, the defects in the prior art are overcome, and production efficiency is improved.

The invention discloses a servo stamping speed control method based on a jerking movement degree. The method comprises the following steps of S1, building a three-dimensional model of a component to be stamped and introducing the model into finite element analysis software; S2, setting a material parameter, a boundary condition and a contact condition, and dividing grids; S3, setting a displacement amplitude mathematical expression to be X=At3+Bt2+Ct+D, and determining an initial value range of A to be 0 to 1, the initial value range of B to be 0 to -3, the initial value range of C to be 1 to 3, and the initial value of D to be 0; S4, selecting different values within the initial value ranges of A, B and V to set different displacement amplitude curves, and submitting for computation; and S5, extracting data from computation results for comparative analysis, and determining the optimized value ranges of A, B and C. According to the method provided by the invention, the displacement, speed, acceleration jerking movement degree can be continuously adjustable, and shaping quality of the complex components and the components difficult to shape is enhanced.

The invention discloses a switched reluctance motor noise reduction control method and system, and the method comprises the steps: controlling the operation of a switched reluctance motor through adjusting a commutation angle and voltage; a mode of combining torque control and commutation control of the switched reluctance motor is adopted, and the switch excitation state of each phase of the switched reluctance motor is dynamically adjusted by controlling the total torque output by the switched reluctance motor in real time; the dynamically adjusted commutation torque ripple of each phase switch is reduced, and the air noise and mechanical vibration of the operation of the switched reluctance motor are reduced accordingly, so that the total torque ripple is in a preset range. According to the scheme, the torque control characteristic of the switched reluctance motor is optimized aiming at the inherent commutation torque pulsation problem of the switched reluctance motor, so that the air noise of the operation of the switched reluctance motor is reduced, and the high-frequency mechanical jitter of the operation of the switched reluctance motor is reduced.

The invention belongs to the technical field of application of tablet and chemical production machinery, and particularly discloses a movable pharmaceutical dust collection structure. The movable pharmaceutical dust collection structure is composed of a box frame, universal wheels, a hand push rod positioning plate, an inclined hand push rod, a dust collection assembly and a lifting assembly, wherein the universal wheels are arranged at four corners of the bottom of the box frame, the hand push rod positioning plate is arranged on one side of the box frame, the inclined hand push rod is arranged on the hand push rod positioning plate, the box frame is fastened with the hand push rod positioning plate by a positioning bolt, and the dust collection assembly and the lifting assembly are arranged on the box frame. The movable pharmaceutical dust collection structure has the beneficial effects of reasonable structural design, long service life, small vibration and low noise generated during use, convenience in efficiently discharging dust collection bags by virtue of the lifting of an air cylinder, excellent anti-explosion performance, high safety factor, high efficiency, energy conservation, closeness in operation, standardability and safety in use, attractive appearance, practicability, convenience in flushing, corrosion resistance, low noise, flexibility in movement and continuous adjustability and continuity of the rotating speed, the intelligent control production requirements are met, and the whole structure is made of stainless steel materials.

The invention discloses a brushless DC motor with an asymmetric winding. The brushless DC motor with the asymmetric winding comprises the components of a housing, a front end cap, a back end cap, a stator, a rotor, a circuit board assembly, a sensor rotor, a sensor back cover, a connector base and an electric connector. The stator is bonded in the housing. The stator comprises a stator core and a winding. The stator core is provided with stator trough structures. The winding is inlayed in the stator trough structures asymmetrically. According to the stator winding of the brushless DC motor with the asymmetric winding, a parallel winding manner of a plurality of enameled wires is adopted, thereby greatly enlarging a motor current. Under a precondition that the motor size is unchanged, motor power is remarkably improved. For realizing small-amplitude adjustment on the working rotating speed of the motor in a certain range, the numbers-of-turns of the winding in the troughs are different from one another. The asymmetric winding is equivalent with a fractional number-of-turns winding, thereby realizing continuous and adjustable rotating speed of the motor, and ensuring a fact that the motor satisfies a technical requirement.

The invention relates to an open arc on-line surfacing repair device and method for a grinding roller of a medium-speed mill. The open arc on-line surfacing repair device comprises a PLC welding control box, and an electric welding machine, a welding trolley, a double-drive wire feeder and a limit switch which are connected with the PLC welding control box. A grinding roller driving device is arranged at the bottom of the grinding roller; a welding gun is arranged on the surface of the grinding roller; the rear end of the welding gun sequentially communicates with the double-drive wire feederand a welding wire straightening mechanism through a connecting rod; a welding wire placed on a wire feeding device penetrates into a wire inlet of the welding wire straightening mechanism; and the double-drive wire feeder is mounted on the welding trolley through a welding gun angle adjusting mechanism. On-line surfacing repair is carried out on the grinding roller without disassembling the grinding roller, so that a large amount of manpower and material resources are capable of being saved and the repair period is capable of being shortened. The open arc on-line surfacing repair method mainly ensures that each performance of a surfacing layer meets repair requirements by selecting welding parameters and welding modes.

The present invention relates to a permanent-magnet D.C. incremental motor, which comprises machine seat, stator, armature, output shaft and commutator, one of stator and armature is made of permanent-magnet, and its correspondent another component is made of electromagnet. The electromagnet is formed from coil frame and conductive coil, said conductive coil is connected with two poles of the commutator. Its ouput shaft can output linear movement, also can output rotary movement by means of crank-guide mechanism. The stator can be made of two permanent-magnets or electromagnets, and its correspondent armature comprises one electromagnet or permanent-magnet. Its structure is simple, output power and rotating speed can be continuously regulated so that it can be extensively used in the design and manufacture of electromechanical products.

Disclosed is an intelligent warp-knitting-machine needle-bed headstock speed-range variable motion system which comprises a variable speed motor, a rotating shaft and a needle bed plunger cap. The variable speed motor drives the rotating shaft, the needle bed plunger cap is mounted on the extension end of the rotating shaft through a radial regulating device, and the needle bed plunger cap is radially adjustable along the rotating shaft. Output of kinetic energy is achieved in the motion mode that the variable speed motor drives an eccentric wheel with adjustable eccentric distance to move, sothat traveling trajectory of a needle bed swinging cam of a warp knitting machine is flexibly variable; driving on a plunger does not rely on the travelling cam, so that the plunger does not contactwith the cam directly; lateral force does not exist since the plunger is only subjected to axial force, motion resistance is greatly lowered, abrasion of the plunger is avoided, a plunger driving mechanism does not need to be dipped in an oil groove, and the problem about lubricant pollution commonly existing in the warp knitting machine is solved.