385results about How to "Control vibration" patented technology

The invention discloses a variable damping shock absorber and a drum washing machine using the shock absorber. The shock absorber disclosed by the invention comprises a shock absorber barrel, a piston rod and a piston, wherein the shock absorber barrel comprises a damping cavity and a buffering cavity; the piston rod is inserted into the barrel; the piston is fixedly arranged on the piston rod in the damping cavity; the buffering cavity is communicated with the outside; the damping cavity is filled with magnetic fluid; an electric magnet and a throttling orifice for the magnetic fluid to pass through are arranged in the piston; the electric magnet is connected with a master controller through a wire in the piston rod; and the master controller changes the liquidity of the magnetic fluid by controlling the magnitude of current and utilizing the magnetism variation of the electric magnet, thereby realizing the purpose of adjusting the damping in real time. In the washing machine disclosed by the invention, the real-time damping adjustment can be realized according to the rotating speed of a motor through the shock absorber. The variable damping shock absorber and drum washing machine disclosed by the invention have the advantages of simple structure, high sensitivity and obvious shock absorption effect, and are suitable for being popularized and used.

An idling stop control of the invention attains an auto start and an auto stop of an engine. At a time point t1, pre-set stop conditions are met to cut off a fuel supply to the engine. Preset starting conditions may be met at a time point t2 when the engine still continues rotating in a normal direction by the inertial force. In this state, the idling stop control starts cranking the engine. The preset starting conditions may be met at a time point t4 when a piston does not complete a compression cycle immediately before a stop of the engine but is pressed back by the compressed air to rotate the engine in a reverse direction. In this state, the idling stop control waits until cancellation of the reverse rotation of the engine and then starts cranking the engine. The arrangement of the invention desirably ensures a quick start of the engine, while effectively preventing an excess stress from acting on a gear mechanism, which connects a starter motor to the engine.

A controller and a method for use in a vehicle to limit noise, vibration, and harshness (NVH) by controlling torque matching between a first power source and a second power source. A first and a second torque estimate are made for the first power source. The torque matching comprises calculating a correction factor based upon a comparison of the torque estimates made during steady-state operating conditions of the vehicle. The first torque estimate is based on operating parameters for the first power source and the second torque estimate is based on operating parameters for the second power source.

The inventive vibration absorber comprises an execution unit, a control unit and a sensor. The execution unit consists of a magnetic inductor, a coil, a magnetic rheological elastic body, a vibration-absorbing mass block and a base. The above magnetic inductor consists of inner and outer sleeves, or a U-shaped iron-core and an armature or top and bottom plates and a column iron-core. Between inner and outer sleeves, the U-shaped iron-core and the armature or the top and bottom plates are filled the magnetic rheological elastic bodies. By regulating the voltage on the coil, the rigidity and the elasticity of the magnetic rheological elastic body are regulated to make its vibration frequency change, so as to make the vibration frequency of the vibration absorber execution unit is the same as that of the vibration-damping object.

The invention discloses a driving-driven hybrid vibration isolator which comprises an air bag vibration isolator, wherein the air bag vibration isolator comprises an upper cover plate, a lower cover plate and an elastic bag body arranged between the upper cover plate and the lower cover plate. An electromagnetic actuator is arranged in the elastic bag body and comprises an armature, an iron core matched with the armature and a coil winding on the iron core, the armature is fixed on the upper cover plate, the iron core is fixed on the lower cover plate, an air gap is reserved between the armature and the iron core, a radiating sheet is arranged on the coil, and the bottom of the radiating sheet is connected with the lower cover plate. An air hole and a line hole respectively leading to the elastic bag body are arranged on the lower cover plate, an air sealing socket is arranged at the outlet position of the line hole, and a vibration sensor connected with a work state control end of the electromagnetic actuator is arranged on the lower cover plate. The driving-driven hybrid vibration isolator has the advantages of being high in reliability, small in energy consumption, low in cost, small in occupied space, good in adaptability and the like, can be adjusted adaptatively along with load changing of a vibration isolating device, and can achieve synchronous and effective control of broadband vibration and line spectrum vibration.

A drill bit comprises a bit body having a plurality of upstanding main blades formed thereon. The main blades have a plurality cutting elements mounted thereon, and they are shaped such that a cutting profile of the bit includes a nose portion, an inner cone region located radially inwards of the nose portion and an outer region located radially outwards of the nose portion. The bit further has at least one additional blade. The additional blade carrying cutting elements located radially inwards of the outer region of the cutting profile, but being substantially free of cutting elements located in the outer region of the cutting profile.

The invention discloses a tuning quality damper vibration reduction control device used in a wind turbine, which relates to tuning quality damper vibration reduction control technology. The invention is arranged inside a tower arranged at an upper end of a wind generator and comprises a platform, rotation adjusting devices, a power device, a quality block assembly and a damper arranged on the platform; the platform is fixed on the internal wall of the tower; the key design points of the invention are characterized in that: the power of the power device drives the quality block assembly to rotate through the rotation adjusting devices so that the components on the platform can rotate synchronously along with the yaw of the wind turbine. Opposite direction adjustment can be realized forwardly along with wind directions by the invention, thus controlling vibration amplitude to the utmost extent. Furthermore, based on MTMD vibration reduction mechanism, the invention also provides an MTMD technical proposal with a plurality of single TMDs arranged from top to bottom in sequence; the power device coaxially drives varied rotation adjusting devices, thus guaranteeing the synchronous rotation speed of each turntable and controlling the vibration of the tower within a frequency band scope caused by the rotation of wind wheels.

Provided is an exhaust turbine equipped with an exhaust control valve (waste gate valve) which can reduce wear of the contact surfaces between the shaft and the bushing or the turbine casing that support the moving components of the valve in the entire operating range of the exhaust control valve. The exhaust turbine is equipped with the exhaust control valve for opening/closing an exhaust bypass passage which extends from an exhaust passage leading the exhaust turbine being driven by exhaust gas output from an engine to an exhaust outlet passage while bypassing the exhaust turbine, wherein the exhaust control valve comprises a shaft which is supported rotation-freely by a bushing or a turbine casing and supports a valve element for controlling the opening of the exhaust bypass passage, an arm equipped with a connecting part with a drive source and turning the shaft about the axis thereof by the reciprocating motion of the connecting part produced by the drive source, and a weight attached to an end on the side opposite to the connecting part with the drive source with respect to the axis of the shaft.

The invention relates to an air conditioning line vibration control system and method. A vibration sensor used for monitoring vibrational amplitude of a line is disposed on the line between a compressor of an air conditioner and a condenser thereof, a value of the vibrational amplitude of the line is transmitted to an outdoor unit master control panel, and the outdoor unit master control panel adjusts running frequency of the compressor according to the value of the vibrational amplitude. The value of the vibrational amplitude of the line is monitored to control the running frequency of the compressor, the system monitors vibration of the line in real time and auto-adjusts the running frequency of the compressor according to pre-set rules, the influence of other factors upon vibrational frequency is eliminated, the vibration of the line can be effectively controlled in a certain range, effective control of line vibration is achieved, and system reliability is improved.

It is the object of the present disclosure to provide an improved end mill that can be easily manufactured, reduces cutting forces on the driving tool, limits chatter at high rotation speeds, has better stability, produces smoother cutting surfaces, and has less natural resonating frequencies while in use to permit operation of the end mill over a wider range of operating conditions. The end mill is equipped with a series of sinusoidal cutting edges with a single long pitch arranged regularly or irregularly along the circumferential cutting surface. In another embodiment, the pitch, the cutting angle of the datum line of the sinusoidal cutting edges and the amplitude of the sinusoidal function can be varied.

The invention provides a novel vibration control device with vibration isolation and absorption functions. The novel vibration control device comprises an outer corrugated pipe, an inner corrugated pipe, an upper end plate, a lower end plate and a mass block; the upper end plate and the lower end plate are in bolted connection with mechanical equipment and an installation base by the aid of through holes; the outer corrugated pipe is fixedly connected with the upper end plate and the lower end plate in a welded manner and realizes effects of a vibration isolator; and two ends of the inner corrugated pipe are respectively fixedly connected with an inner cover and the mass block, and the axial rigidity of the inner corrugated pipe and the mass of the mass block are adjusted, so that effects of a vibration absorber can be realized. Accordingly, the novel vibration control device has the vibration isolation and power vibration absorption functions, has the advantage of compact structure, and can easily solve the problem of difficulty in controlling vibration of mechanical equipment which is arranged at a small spatial position and is incapable of being simultaneously provided with vibration isolation and absorption devices.

The invention discloses a magneto-rheological pipeline dual-dynamic damping absorber. The mode of combining dynamic vibration absorption and damping dissipation energy vibration damping is adopted for controlling vibration of a pipeline. A magneto-rheological damper is adopted as a mass block and a leaf spring to form a first-order dynamic vibration damping structure, when the pipeline vibrates, the mass block and the leaf spring vibrate along with the pipeline and generate inertia reactive force, and vibration of the pipeline is lowered. A piston body, a spring, magneto-rheological fluid and a cylinder tube of the magneto-rheological damper form a second-order dynamic damping vibration damping structure. When the magneto-rheological damper vibrates along with the pipeline, the piston body compresses the piston to generate reactive force for the magneto-rheological damper under the inertia effect, and when the piston body and the cylinder tube move relatively, the piston body dissipates vibration energy under the damping force effect of the magneto-rheological fluid. The controller adjusts the damping force according to the vibration acceleration of the pipeline, and the energy dissipation efficiency of the damper is improved. One way, radial, axial and fixing frames can be flexibly assembled according to the pipeline vibration phenomenon, and vibration of the pipeline in any direction is controlled.

This invention relates to a rig using for the tunnel anchor below the coal mine. This invention resolves the problem of the existing technology. It supplies an airborne anchor pole rig that can locate more precise and assurance the quality of anchor hole. It includes hydraulic motors, tanks, fixation agencies, supporting agencies, feed and drilling sector. The front bracket inserts the sliding chute of back bracket. The supporting guide pole installed in the front bearer penetrates the guide hole of the back bracket. The guide plate connecting to feed tank is installed feed guide pole of the front bracket. The guiding hole on the hydraulic motor bed is installed on the feed guiding pole. Thus, all expanding components move along the guide pillar and the sliding chute, so the locating is more precise, the anchor hole has the high quality.

The invention relates to a gear eccentric cycloidal roller pin reduction gear, in particular to a reduction gear with the combination of a gear change structure and an eccentric cycloidal roller pin gear change structure. A composite 2-level reduction gear with the combination of a planetary gear structure and an eccentric roller pin structure is designed. The reduction gear is composed of an input part, a speed reduction part and an output part. The reduction gear is characterized in that a spur gear planetary mechanism without an outer gear ring is used for first level speed reduction, a sun gear on the input shaft drives three planetary gears to be used for achieving first level speed reduction, a pair of double-eccentric structure which is misplaced by 180 degrees is arranged on the three planetary gears, and two bearings, namely rotating arms, are arranged on each segment of eccentric cylinders to be used for driving two cycloidal gears to rotate. The reduction gear has the advantages of being high in reduction ratio and high in efficiency, the single-level transmission can reach the reduction ratio of 1:3, the efficiency reaches 90%, and if multi-level transmission is adopted, the reduction ration will be greater.

The present invention discloses a dehydration control apparatus and method for a washing machine. The dehydration control apparatus for the washing machine includes: a storing unit for storing reference unbalance quantities according to each load quantity; and a control unit for detecting a load quantity and an unbalance quantity by accelerating or decelerating a motor of the washing machine, comparing a reference unbalance quantity from the stored reference unbalance quantities that correspond to the detected load quantity with the detected unbalance quantity, and determining dehydration completion according to the comparison result.

Embodiments of the present invention disclose a screen sound production control method and apparatus, and an electronic device. The method comprises the following steps: detecting a touch operation acting on a display screen, and taking a region which detects the touch operation action as a target region; configuring vibration parameters corresponding to the target region; and controlling a plurality of exciters to vibrate based on the configured vibration parameters. According to the method, under the condition that the display screen and the plurality of exciters for driving the display screen to produce sound are included, and the plurality of exciters corresponding to different regions of the display screen respectively, the obtained region which detects the touch operation action as the target region, and then the vibration parameters corresponding to the target region are obtained so as to control the plurality of exciters to vibrate based on the parameters, thereby achieving thegoal of adjusting the vibration parameters of the plurality of exciters by touching different regions, and improving the flexibility of screen sound production.

The invention discloses a method of large-proportion coal slime blending combustion of a circulating fluidized bedboiler. The method comprises the steps of (1) coal slime screening; (2) coarse slime unloading; (3) coarse slime airing and drying; (4) conveying of humidity-qualified coarse slime to a coal handling system; (5) coal conveying of the coal handling system; (6) coal feeding of the circulating fluidized bedboiler; and (7) combustion of fuel coal in the circulating fluidized bedboiler. The method of large-proportion coal slime blending combustion of the circulating fluidized bedboiler has the advantages that after low bed pressure operational optimization is implemented, the boiler efficiency reaches up to 91.9% and is increased by 1.9% when compared with a design value, the vibration of a material return device is effectively controlled, and the abrasion of a boiler heating surface is reduced; by means of implementation of low oxygen combustion optimization, the cost can be reduced by 4,800,000 RMB annually, and the standard coal can be saved by approximately 5,120 tons annually; and the generation of part of nitric oxide can be inhibited from the angle of combustion, and the urea usage amount of an SNCR system can be reduced.

The invention relates to an anti-dumping hand-push electrical mower which is provided with a machine casing, a power mechanism, an upper cover, a handrail, a grass collecting hopper, a front travelling wheel unit and a rear travelling wheel unit, wherein the upper cover and the handrail are connected with the upper part of the machine casing; the grass collecting hopper is connected with the rear part of the machine casing; and the front travelling wheel unit and the rear travelling wheel unit are connected with the bottom of the machine casing. The power mechanism is in a forwards arranged type. A motor can perform a certain whole machine weight balancing function after arranged on the front part. Part of the grass collecting hopper is arranged in the front space of the rear wheel, so that the grass collecting hopper is arranged on the front part as much as possible, the volume of the grass collecting hopper is ensured, and simultaneously, the distance between the rearest end of the grass collecting hopper and the furculum of the rear wheel is shortened. An adjusting handle, a triangular front connecting component and a triangular connecting component form the connecting rod mechanism. When the machine casing is adjusted to the highest position, i.e. the machine is in the highest cutting position, the machine moves forwards and moves backwards relative to the furculum of the rear wheel, thereby being beneficial to balancing the whole machine.

The invention discloses a terminal control method and a mobile terminal. The mobile terminal comprises a screen and a piezoelectric material layer stacked on the screen. The method comprises the stepsthat when the piezoelectric material layer or the screen is touched, a touch region is determined according to a first voltage output by the piezoelectric material layer; and/or, a second voltage isoutput to the piezoelectric material layer, and the piezoelectric material layer is controlled to vibrate and/or produce a sound. According to the terminal control method and the mobile terminal, thevoltage is transmitted through the piezoelectric material layer stacked on the screen, the touch region can be accurately detected, the piezoelectric material can be controlled to vibrate and/or produce a sound, and therefore the sensitivity and stability of human-computer interaction are improved.