36results about How to "Severe vibration" patented technology

The invention relates to a spindle motor having a fluid dynamic bearing system, used particularly for driving the storage disks of hard disk drives, having a baseplate, a stationary bearing bush disposed in an opening in the baseplate, a shaft rotatably supported in an axial bore in the bearing bush by means of the fluid dynamic bearing system, a hub connected to the shaft, and an electromagnetic drive system. The invention is characterized in that the shaft has a flange that is fixed in an opening in the hub and whose outside diameter is significantly larger than the smallest outside diameter of the shaft.

The invention relates to a shock-proof electric marine engine e.g. an engine or generator, for a marine (Navy) ship, comprising a stator and a rotor in a housing, whereby the stator and the rotor are connected in such a way that they are rotatably displaceable in a counter direction and in a radial/axial manner with limited slack. Said rotor and stator form a displaceable unit in relation to the housing, which can be displaced away from the housing with a higher vibration overshoot range. Said housing is elastically connected to the marine(navy) ship.

The invention relates to the field of unmanned aerial vehicles and provides an unmanned aerial vehicle resistant to interference in hovering and a control method. The unmanned aerial vehicle resistant to interference in hovering comprises a body and a master control unit in the body, auxiliary propellers and a wing gliding device are arranged around the body, the auxiliary propellers are controlled by the master control unit, and rotation planes of the auxiliary propellers are perpendicular to the horizontal plane and adjustable in direction. The wing gliding device is mounted on a driving device, the driving device operates to drive the wing gliding device to be in an expanding or folding state, and a sensing device is further mounted on the body. By addition of the auxiliary device to the unmanned aerial vehicle, strenuous vibration of the unmanned aerial vehicle in hovering is avoided, so that the unmanned aerial vehicle can be in a stable state. Therefore, the problem that the unmanned aerial vehicle is prone to vibration under influences of external environments is solved, and reliability of the unmanned aerial vehicle in hovering is improved.

A method for pouring concrete into pile hole and compressing and its vibrator are disclosed; including the following steps: (1) according to the work mode of concrete pile to choose the type of vibrator, use shape steel or steel pipe as the structural force-passing element; when there is mud staying in the upper part, use steel pipe; (2) pour concrete into the pile hole; (3) insert the vibrator into the concrete to vibrate and stress. The method suits for CFG pile dry work pouring pile method, wet work circulative pouring method and digging-drilling method etc.

The invention belongs to the field of tea processing, and particularly discloses a tea packaging device. The tea packaging device comprises a rack. The rack is provided with a stirring unit, a vibration unit and a packaging unit from top to bottom in sequence. The stirring unit comprises a stirring barrel fixed to the rack, an end face gear arranged on the inner wall of the stirring barrel and a first rotary shaft located below the end face gear. The end of the first rotary shaft is fixedly connected with a first gear engaged with the end face gear. The vibration unit comprises a first vibration plate and a second vibration plate. The first vibration plate and the second vibration plate are hinged to the two sides of the bottom of the stirring barrel respectively. Both the first vibrationplate and the second vibration plate are electric heating plates. The rack is rotationally connected with a sector gear. The end, away from a first connecting rod, of a second connecting rod is fixedto the end face of the sector gear. The packaging unit comprises a second rotary shaft rotationally connected to the rack. The packaging unit further comprises a conveyer belt used for transferring packaging boxes. By adopting the tea packaging device of the scheme, the problem that tea is not evenly heated when being dried is solved.

The invention discloses a microbubble synergistic dynamic experiment system based on a double frequency superimposed ultrasonic pulse in a viscoelastic medium and a microbubble synergistic dynamic experiment method based on the double frequency superimposed ultrasonic pulse in the viscoelastic medium. The experiment method comprises the following steps 1) according to an actual waveform of a focal region sound field measured by a hydrophone, setting KZK equation parameters and establishing a microbubble nonlinear excitation waveform; 2) constructing a HIFU synergistic model according to viscoelasticity of a biological tissue and vibration characteristics of the microbubble in compressible fluid; 3) establishing a microbubble synergistic dynamic method based on double frequency superimposition; 4) in combination with simulation results of steps above, determining a HIFU waveform phase, sound pressure and frequency parameters to perform a thermal ablation or tissue damage experiment. According to the system and the method provided by the invention, the dynamic characteristics of the microbubble in the biological tissue are used fully to design the sound wave waveform and the phase parameter, maximum vibration of the microbubble is triggered at a focal region, a cavitation effect is enhanced, and safety and efficiency of HIFU thermal ablation and tissue damage are improved.

The invention relates to the technical field of building construction, and discloses a working platform used for a courtyard of a super high-rise building. The working platform comprises a lift truck;the top of the lift truck is fixedly connected with the working platform through a lift; each of the side ends of the working platform is fixedly connected with a guard bar; the upper end of the working platform is fixedly connected with a motor; a lift board is arranged above the motor; threaded holes are symmetrically formed near the two ends of the lift board; two threaded rods are fixedly/rotatably connected with positions, corresponding to the threaded holes, on the upper end of the working platform symmetrically through two first bearings; the two first bearings are fixedly arranged atone end, near the lift board, of the working platform; the two threaded rods are opposite in thread direction; and one end, far away from the working platform, of each threaded rod passes through thecorresponding threaded hole and extends upwards. The working platform used for the courtyard of the super high-rise building can be finely adjusted in a small range without adjusting the lift truck, so that the phenomenon that violent vibration is brought to the working platform due to adjustment on the lift truck is avoided, and meanwhile, time is saved.

The invention relates to solder wire preparation equipment, in particular to a solder wire preparation machine. The solder wire preparation machine comprises a rosin treatment mechanism, an extrusionmechanism and a rosin pen communicating with the rosin treatment mechanism and the extrusion mechanism. The extrusion mechanism comprises a hydraulic cylinder for providing extrusion power, an extrusion rod for extruding a solder column and a solder wire mold for generating a solder wire; the rosin pen communicates with the solder wire mold; the rosin treatment mechanism comprises a fusion cylinder used for fusing rosin at a high temperature, an externally-connected tank communicating with the fusion cylinder, two liquid through pipes, one air through pipe, an internally-connected tank communicating with the rosin pen, and an air pump; the bottom of the fusion cylinder communicates with the bottom of the externally-connected tank through one liquid through pipe; the bottom of the externally-connected tank communicates with the bottom of the internally-connected tank through one liquid through pipe; an extraction opening of the air pump communicates with the top of the externally-connected tank; an air outlet of the air pump communicates with the top of the internally-connected tank; and an extraction opening is formed in the top of the externally-connected tank. The solder wire preparation machine can prepare the solder wire not provided with a hollow cavity.

The invention belongs to the technical field of a vibration adjusting process of a stable structure of a main coolant pipeline of an AP1000 nuclear power plant. By analyzing a vibration adjusting problem, the process comprises the following steps: S1, measuring and recording data before adjustment; S2, removing a rigid bracket: mounting a temporary support right above positions of pipelines mounted on an upper rigid bracket A, an upper rigid bracket B and a lower rigid bracket B, and matching with a hand pulled block to remove the rigid brackets synchronously; and S3, adjusting and back-mounting the brackets. Vibration of an ADS-4 grade pipeline is adjusted, so that the vibration problem of ADS-4 grade B/D column pipelines is solved.

The invention relates to a water purifier and a method for protecting a water pump by using the water purifier. The water purifier comprises a raw water barrel, a water suction pump, a filtering system and a control assembly, wherein a gas-water liquid level control tank is installed on a raw water pipe, raw water in the raw water barrel is sucked by the water suction pump and collected to the gas-water liquid level control tank, and then flows to the filtering system to be filtered to generate purified water, the generated purified water is discharged through a purified water pipe, the generated concentrated water flows back to the raw water barrel through a water return pipe, an inductive switch is arranged on the outer wall of the tank body of the gas-water liquid level control tank, and the control assembly is in control connection with the inductive switch, the water suction pump and the filtering system. The water purifier is matched with the water pump protection method, the gas-water liquid level control tank is utilized for collection and transfer, the water pump and the filtering system are protected by discharging bubbles, the service life of the water pump is prolonged, and the filtering system is prevented from making harsh noise and violent vibration during working.

The invention relates to an ultrasonic exciting hydrogenation reactor, which comprises a reaction container and a hydrogen storage tank. The reaction container is arranged in a swinging cover, and the swinging cover is connected with a swinging mechanism; an adjusting valve and a pressure meter are connected between the reaction container and the hydrogen storage tank, the adjusting valve is respectively provided with an air inlet, an operating port and an exhaust port communicated with the hydrogen storage tank, the reaction container and the outside, and the pressure meter is communicated with an inner cavity of the adjusting valve; the reaction container is provided with a heating device and a temperature control device; and the bottom of the reaction container is provided with an ultrasonic vibrator, and the ultrasonic vibrator is in signal connection with an ultrasonic generator. The invention provides the ultrasonic hydrogenation reactor with high transfer efficiency, strong sealability and correct measurement.

The invention relates to the technical field of conference tables, in particular to an intelligent U-shaped conference table, which comprises a working unit and an adjusting unit, the working unit comprises a U-shaped table body, a working computer, a seat, a working box and a functional control center, working positions are evenly arranged on the U-shaped table body, and the working positions are separated through supporting plates evenly arranged on the lower bottom face of the U-shaped table body. According to the invention, the face activity of a conference participant is captured through the information acquisition camera on the working computer, the face activity of the participant is transmitted to the intelligent control center, the fatigue degree of the conference participant is judged through the intelligent control center, and the motor is controlled to enable the foot rest lever to rotate and act on conference workers; meanwhile, the backrest is pushed through the second air cylinder, so that the conference worker is reminded, and fatigue of the conference worker is relieved.

The invention discloses a steady pressure type high-capacity energy accumulator. The steady pressure type high-capacity energy accumulator comprises a base, a cylinder body, an upper end cover provided with an air supplement device, a limiting assembly with a function of limiting the height of a fuel head, a single-way valve assembly with the function of opening a fuel way between a pressure gageand an energy storage cavity, an overflow valve assembly and the pressure gage. The upper surface of the base, the inner wall face of the cylinder body and the lower surface of the upper end cover form the energy storage cavity. The upper portion of the interior of the energy storage cavity is gas, and the lower portion is hydraulic oil. The limiting assembly is arranged on the portion, in the energy storage cavity, of the base. The steady pressure type high-capacity energy accumulator is simple in structure, can effectively utilize the space, reduces the diameter of the cylinder body of the energy accumulator, and simplifies the structural style of a traditional energy accumulator. Compared with an existing energy accumulator with the same capacity, the size of the steady pressure type high-capacity energy accumulator can be reduced by one quarter, thus the production and manufacturing cost is saved, and the reliability of the structure is improved. In the working process of the steady pressure type high-capacity energy accumulator, special hydraulic oil is not needed, therefore waste of the hydraulic oil cannot be generated, and the operation cost is saved. The steady pressure type high-capacity energy accumulator reduces the workload of maintenance in the later period.

The invention discloses a vibration energy collection device based on piezoelectric stack and electromagnetic induction, and the device sequentially comprises a device pedestal, a device frame, an amplitude amplification mechanism and an energy collection mechanism from the bottom to the top, and the amplitude amplification mechanism comprises a piezoelectric device, a first magnet array and a second magnet array. The energy collection mechanism comprises a cantilever beam, a third magnet array, a fourth magnet array and an electric induction coil, and compared with other energy collection devices, the device has the advantages that vibration is more fully utilized, and more output energy can be obtained.