122results about How to "Avoid large vibration" patented technology

The invention provides a bar conveying device, belongs to the technical field of machinery, and solves the problems that the conventional bar conveying device has large vibration and low feeding precision in the process of conveying. The bar conveying device comprises a machine frame, wherein the machine frame is provided with a guide mechanism used for enabling a bar to move along one direction;the machine frame is also provided with a fixture capable of clamping the bar; and the fixture does linear reciprocating motion under the drive of a driving mechanism, stays in a state of clamping the bar when moving towards the bar moving direction, and stays in a loose state when returning towards the opposite direction. The bar conveying device has the advantages of high feeding precision, high feeding efficiency, little vibration, less noise, long service life and the like.

A damping-rigidness-controllable double-freedom-degree vibration active control platform comprises a cross-shaped beam frame and a square base which are connected through a flexible hinge. A cross-shaped beam of the cross-shaped beam frame is distributed in the diagonal directions of the square base. A structure column is arranged at the center of the cross-shaped beam frame. Sensors and actuators are connected between the lower portions of the diagonal top ends of the cross-shaped beam frame and the square base respectively. Four limiting columns are arranged between the cross-shaped beam of the cross-shaped beam frame and the square base respectively. Prearranged gaps are reserved between the limiting columns and the cross-shaped beam frame. Four balancing weights are fixed on the lower portion of the cross-shaped beam frame between the sensors or the actuators and the limiting columns respectively. Twisting limiting spring pieces are arranged at the symmetrical positions on the lower portion of the cross-shaped beam frame between the limiting columns and the flexible hinge. The electromagnetic type sensors and the electric-damping electric-rigidness actuators are used to achieve detecting of angular speed and actuating, the flexible hinge and the spring piece with changeable thickness are combined to achieve controllable damping and rigidness in a quantifying mode, and double-freedom-degree vibration active control in the x direction and the y direction of the structure is achieved.

The invention provides a vibration electric hammer, wherein a drill sleeve is fixedly mounted at a front end of a cylinder body; an impacting hammer is mounted on a proper position on a rear part of the drill sleeve; a compression spring is mounted the proper position of a drive piston; the drive piston and the compression spring are mounted in the cylinder body at the back of the drill sleeve; an air hole is arranged on an upper surface of an outer circle of the cylinder body; the drive piston can seal the air hole at a free state; large bevel gears are fixedly mounted at the proper position of the cylinder body; the large bevel gears, small bevel gears, large gears, small gears and a motor sequentially form a drive chain relationship; the piston is mounted at the proper position at the back of the cylinder body; a connecting rod iron core is connected with the piston via a pin shaft; and an electromagnet is fixedly mounted in a shell at the proper position at the back of the cylinder body.

The invention relates to a pinch roll guide for guiding rolled pieces into a laying head. A guide groove for the rolled pieces to pass through is arranged in the guide and is communicated with the inlet and the outlet of the guide; a tail guide roll set is arranged at the tail of the guide and comprises a plurality of branched guide rolls; annular grooves are formed along the circumferential directions of the branched guide rolls; the groove surfaces of the annular grooves on each of the branched guide rolls enclose a full circle for the rolled pieces to pass through; the branched guide rolls are fixed on guide roll seats; and the guide roll shafts of the branched guide rolls are rigidly matched with the guide roll seats. The technical scheme shows that the guide roll shafts of the branched guide rolls are rigidly matched with the guide roll seats for fixing the branched guide rolls, thus the closeness of the full circle can be kept all the time, and the elastic change can not occur. The rigid matching can achieve the purpose of forcibly fixing cores of the rolled pieces, has high guide precision, good rigidity and small vibration, avoids impact, surface scratches and scuffing caused by off tracking generated when the rolled pieces enter the full circle, and simultaneously avoids large amplitude vibration of the guide, or distortion and stacking of the rolled pieces and other phenomena.

The invention relates to a bow raising air source system of a railway vehicle. The bow raising air source system of the railway vehicle comprises an installing frame which is provided with an air compressor. One end of the air compressor is connected with a socket through a cable, and the socket is connected with the compressor and supplies power to the air compressor through a plug. The other end of the air compressor is connected with a check electromagnetic valve through an air guiding pipe. The check electromagnetic valve is connected with the air inlet end of a drier and a safety valve through the air guiding pipe. A heater and a pressure switch are installed on the drier. A regenerative opening of the drier is connected with an air storage barrel through the air guiding pipe. The output end of the drier output supplied air through the air guiding pipe. A support is connected with the installing frame. The bow raising air source system of the railway vehicle is compact and reasonable in structure and firm in installation, an assembly is light, the motor burnout phenomenon cannot be caused easily, vibration is small, and the air leakage and electric leakage phenomena cannot be caused easily because vibration is small.

The invention provides a large-span steel truss combined continuous beam structure. The beam structure comprises a concrete deck slab, two steel trusses, a side span fulcrum and a middle fulcrum; thesteel trusses comprise upper chord members and lower chord members, wherein a plurality of web members are connected between the upper chord members and the lower chord members; the upper chord members are of horizontal straight rod structures, an upper parallel-connection structure is arranged between the two upper chord members, and the concrete deck slab is connected with the upper chord members of the steel trusses; and the lower chord members are in parabolic shapes, a concrete bottom plate is arranged between the two lower chord members in a side span overall length area and a middle span negative bending moment area, and a lower parallel-connection structure is arranged between the two lower chord members in a middle span remaining area. According to the beam structure, a steel truss beam is adopted as main stressed structure, the concrete deck slab is combined with the upper chord members, the concrete bottom plate is arranged in the side span and main span partial areas and combined with the lower chord members, so that the light weight and high strength characteristics of a steel structure are fully exerted, the beam structure can adapt to larger bridge spans, the residual creep down deflection value of the combined beam is extremely small, and the structure total height of the combined beam is smaller than that of other concrete combined structure bridges.

The invention relates to a cylindrical impulse-type hydraulic drive special for a fan of a cooling tower, which can effectively solve the problems of low conversion efficiency of energy of a hydraulic turbine, large plane dimension and mismatching rotary speed, the technical proposal thereof for solving the problems is that: a water channeling chamber, a water guide chamber, a turbine and a spindle are included, the water guide chamber below the water channeling chamber is inside provided with an annular axial guide vane, water stream directly enters the guide vane through the water channeling chamber and enters, after the direction thereof is changed by the guide vane, a turbine chamber positioned at the lower part thereof in a non-impact importing manner, the turbine chamber is inside provided with an impulse-type turbine, the water stream is discharged out through a water outlet of a draft tube subsequent to the work of the turbine, the water channeling chamber, the water guide chamber and the turbine chamber have the same diameter and are arrayed cylindrically from top to bottom, the upper part of the turbine chamber passes through the water channeling chamber and is provided with a combined bearing by being sealed on the spindle of the turbine, and the spindle of the turbine is directly connected with the shaft of the fan; the invention is unique in structure, high in efficiency, small in size, weak in vibration, better suitable for being mounted on industrial cooling tower and mainly used for taking the place of former fan drive motor, thus achieving the purposes of saving energy, guaranteeing safety and reducing maintenance.

The invention discloses a telescopic truss structure for field operation, which comprises a power device, a transmission mechanism and a plurality of trusses sequentially sleeved from outside to inside in a sliding manner. Meanwhile, except for a first stage of truss and a truss on the innermost layer, the outer end of each truss on other layers is provided with an extending pulley and the inner end of the truss is provided with a retracting pulley; an extending steel wire rope is arranged on each extending pulley; both ends of each extending steel wire rope are respectively fixed at the inner ends of two trusses adjacent to the truss with the corresponding extending pulley; each retracting pulley is provided with a retracting steel wire rope; and both ends of each retracting steel wire rope are respectively fixed at the outer ends of two trusses adjacent to the truss with the corresponding retracting pulley. The telescopic truss structure adopts the telescopic structure, so as to effectively improve a spraying range of spraying operation for each time, can also stably and reliably bear required field operation tools, and has high operating efficiency.

The invention relates to the technical field of cleaning, and discloses a shoe sole soil cleaning device which comprises a cleaning box, a drawer and a partition plate, the drawer is slidably installed on one side of the cleaning box, the partition plate is fixedly installed in the cleaning box, two sets of cleaning mechanisms and two sets of shaking mechanisms are arranged in the cleaning box, the two sets of cleaning mechanisms and the two sets of shaking mechanisms are located on the two sides of the partition plate correspondingly, each cleaning mechanism comprises a sinking frame, a rubber pull rope, a longitudinal extrusion rod, a supporting plate, an auxiliary air bag, a transverse extrusion rod, a collision block, an extension spring, a collision ball, a connecting rod, a swing spring, a transverse plate, a rotating ball, an auxiliary rod and a memory metal plate, and the sinking frames are located in the cleaning box, the rubber pull rope is fixedly installed in the sinking frame. According to the shoe sole cleaning device, the memory metal plate and the arc-shaped metal plate are used for cleaning shoe sole soil, and meanwhile a better cleaning effect is achieved.

The invention relates to a synchronous-grouting pre-stressed pipe pile. The synchronous-grouting pre-stressed pipe pile comprises a special pile shoe device, a prefabricated pipe pile, a grouting pipedevice and a grouting layer; the special pile shoe device comprises a main grouting pipe, branch pipe joints, branch pipes and grout discharging holes; the upper end of the main grouting pipe is connected with the grouting pipe device; the lower end of the main grouting pipe is connected with the branch pipes via the branch pipe joints; each branch pipe is connected with the corresponding grout discharging hole; the grout discharging holes are uniformly distributed at an equal interval in the outer side of a pipe pile juncture at the edge of a pile shoe; the grouting pipe device is arranged inside a cavity of the prefabricated pipe pile; and the grouting pipe device comprises a four-claw hook, an upper end interface, a grouting pipeline and a lower end interface. The synchronous-groutingpre-stressed pipe pile provided by the invention has the beneficial effects that the synchronous-grouting pre-stressed pipe pile is a novel pile foundation which is formed by adopting a pile jacking-in method and is additionally provided with a special pile shoe based on an original pre-stressed pipe pile; by synchronous grouting, the sidewall of the pipe pile can be lubricated by grouting liquid,so the difficulty of pile pressing is reduced, and the requirements on the bearing capacity of a place and the requirements on pile pressing equipment are reduced.

The invention belongs to the technical field of compressor equipment, and relates to a dynamic balance type internal combustion air compressor, wherein a power cylinder cover component and a machine body are fixedly connected; the sealing of a power piston and a power cylinder sleeve is realized through a piston ring; the power piston component and a connecting rod body are connected by a piston pin, and further constitute a revolution pair; the connecting rod bodies and a spheroidal graphite cast iron crank shaft of bearing bushes installed in the interiors of connecting rod heads constitute the revolution pairs; the connecting rod bodies and the connecting rod heads are connected into a whole body; an air compression cylinder cover component, a steel valve plate and the machine body are connected into an integral structure; an air compression cylinder sleeve and the machine body are connected; the sealing of an air compression piston component and the air compression cylinder sleeve is realized through the other piston ring; the air compression piston component and the other connecting rod body are connected by the other piston pin, and further constitute the revolution pair; and a suction valve block reset spring and an exhaust valve block reset spring are guided through the utilization of a guide shaft. In addition, the dynamic balance type internal combustion air compressor is reliable in principle, simple in structure, low in preparation cost, high energy conversion efficiency, friendly to the environment, strong in balance function and wide in application.

The invention discloses a portable oxygen generator with the Bluetooth data transmission and control functions and relates to the field of medical health care instruments. The portable oxygen generator with the Bluetooth data transmission and control functions aims at achieving the portable, intelligent and data networking functions of the oxygen generator. The portable oxygen generator is mainly and technically characterized in that sound insulating and noise lowering materials, an output oxygen concentration detection sensor and a built-in rechargeable lithium battery are additionally arranged in a machine case, a Bluetooth chip control circuit board is designed so that wireless data transmission can be achieved, a user reads and analyzes oxygen generation data through a terminal device provided with management software and controls the on-off state and gas flow adjustment of the oxygen generator, data are stored in an Internet server, and intelligent analysis and management of personal health data are achieved.

The invention provides a magnetic suspension bearing control parameter adjusting method and device, a storage medium and a controller, and the method comprises the steps: obtaining the current operation frequency of a magnetic suspension rotor of a motor by collecting a rotor displacement signal when the magnetic suspension motor stops; and according to the obtained current operation frequency ofthe magnetic suspension rotor, performing self-adaptive adjustment of control parameters of the magnetic suspension bearing. According to the scheme provided by the invention, the operation stabilityand reliability of the magnetic suspension rotor can be improved.

The invention discloses a tilting mirror vibration suppression method based on an improved disturbance observer. Since mechanical vibrations of an astronomical telescope make the closed-loop performance of a telescope control system decline and these vibrations cannot be well remedied by a classical control structure, the method adopts a tilting mirror to suppress the vibrations. According to themethod, by designing an improved Q filter., a sensitivity function of a tilting mirror control system is optimized, the large-amplitude vibrations are effectively suppressed, and the influence of a water bed effect on the system performance is reduced. Under the case that the system disturbance frequency is known, the control method can achieve optimal correction, and the disturbance suppression capability of the system is effectively improved. According to the method, the system is optimized from a control algorithm, only one image sensor is needed, and the cost is saved. At the same time, the method is clear, the structure is simple, there is no dependence on models, and the method is easy to operate and implement.

A vacuum pump for producing a vacuum in a space which is to be evacuated has a housing (10) having a cylindrical inner space (22). An expeller (26) is arranged eccentrically in the inner space (22). A helical sealing element (34) is provided between the expeller (26) and an inner wall (38) of the housing (10) for forming at least one crescent-shaped conveying space. The housing (10) or the expeller (26) are connected to a drive device (44) for producing a relative rotary movement between the housing (10) and the expeller (26). According to the invention, the vacuum pump is configured as a dry-running vacuum pump.

The invention discloses an oil tank with a shock absorption supporting leg. The oil tank comprises the shock absorption supporting leg and an oil tank body, wherein the shock absorption supporting leg is arranged at the bottom of the oil tank body and made of nylon materials. According to the oil tank, the shock absorption supporting leg is made of the nylon materials which can prevent static and has high fatigue resistance, rigidity and thermal deformation resistance and is embedded into the oil tank; the shock absorption supporting leg has high fatigue resistance and rigidity, and the thermal deformation is small, so that the shock absorption supporting leg is difficult to drop and difficult to deform after being heated; and the oil tank shocks slightly and is easy to manufacture and low in cost.

The invention relates to printing machinery, in particular to an embedded numerical-control printing pressing force adjustment and clearance tolerance elimination device which comprises a printing device and a printing main unit, wherein the printing device is arranged on a base and provided with a multi-station stepping indexing turntable and a die handle, and the printing main unit is arranged on a main unit support and provided with a transfer print large drum wheel. The device is characterized in that a two-dimensional orthogonal sliding seat is arranged on the base, the main unit support is arranged on the two-dimensional orthogonal sliding seat through a main unit seat plate, an embedded controller is provided with a longitudinal moving device for eliminating a clearance and a touch screen and controls the longitudinal moving device for eliminating the clearance, and the longitudinal moving device for eliminating the clearance is arranged between the base and the main unit seat plate, controls the main unit seat plate to move along the direction perpendicular to the axis of the die handle, and eliminates the tolerance clearance. The embedded numerical-control printing pressing force adjustment and clearance tolerance elimination device is convenient to operate and small in vibration and meets the accuracy requirement of high-speed running of a cup printing machine, the cup printing machine prints 450-650 cups per minute, and the cup printing speed is doubled as compared with that of an existing device.

The invention discloses a fresh air system driven by external equipment. The fresh air system comprises a main machine. The main machine comprises a shell and two ventilation fans with opposite air blowing directions. Transmission assemblies capable of driving the ventilation fan to rotate are installed at the upper ends of the left and right sides of the shell. A dust collector capable of drivingthe transmission assembly to work is detachably installed on the side wall of the shell. The dust collector comprises a dust collector shell, a draught fan slidably connected into the dust collectorshell, a dust collection box and a motor driving the draught fan to work. An output shaft of the motor is fixedly connected with a driving turntable in transmission with a transmission gear disc; a fan driving assembly for driving the fan to slide along the axis of the dust collector shell is mounted in the dust collector shell; the front end of the dust collector shell is rotationally connected with a dust collection cover capable of abutting against the open end of a dust collection box. The dust collector is hung on the outer side of the main machine, so that the motor can drive the main machine to work, and meanwhile, the dust collector can be used as a dust collection tool after being taken down.

The invention provides a waste graphite electrode crushing method through photothermal quick-heating pretreatment. The waste graphite electrode crushing method is characterized in by comprising the following steps that 1, a waste graphite electrode is completely immersed in a hydrogen peroxide solution to be soaked for a period of time; 2, the waste graphite electrode is subjected to photothermalquick-heating through a focused light beam; 3, water is sprayed to the waste graphite electrode subjected to photothermal heating for quick cooling; and 4, the cooled waste graphite electrode is overall placed on a crushing device to be overall crushed. According to the waste graphite electrode crushing method, by utilizing quick gasification expansion decomposition of water molecules and hydrogenperoxide molecules in the quick heating process and a small amount of reaction with graphite, the physical and chemical structure inside the waste graphite electrode is destroyed, then by utilizing amethod of water spraying for quick cooling, the destroy degree of the physical and chemical structure of the waste graphite electrode is further increased, more cracks are formed, and thus one-time overall crushing of the graphite electrode under the low pressure is achieved.

The invention discloses a micro spiral pump system. The micro spiral pump system is characterized in that the system comprises a pump head (1) and a pump body (7) connected with the pump head (1) through a connecting pipeline (6), and a spiral rotary shaft (2) is arranged in the pump head (1). Compared with the prior art, the micro spiral pump system has the advantages that a screw rod is replaced with the spiral rotary shaft, water flow is driven by spiral blades, the centrifugal force of the spiral blades is small compared with the action of the screw rod, therefore, vibration is slight, and a universal joint is not prone to damage; besides, a filtering screen is additionally installed at a water inlet end, so that impact of gravel to the universal joint in the pump body is reduced, a good effect is achieved, durability of the pump head is improved, and the service life of the pump head is prolonged; and a motor is provided with a converter which can selectively input two voltages, electricity can be transmitted to a 48-60V socket through a storage battery in case of a power failure, the production requirement that operation continues in case of the power failure is met, and the operating efficiency of the pump body is improved.