143results about How to "Avoid vibration noise" patented technology

The invention provides an improved thin flat linear vibration motor which comprises a protective device, the protective device is positioned between a vibration module and a cover plate or the vibration module and a bottom surface of the machine housing, so as to prevent the vibration module from striking the coil when moving, the coil is protected and noise is greatly decreased accordingly.

A synthetic resin guide for a transmission device comprises an integrally molded, synthetic resin guide body having a shoe with a front surface for sliding contact with a chain, and a support on its back surface, the support having a longitudinal slot, formed between two opposed walls, for receiving a reinforcing plate. Both the guide body and the plate having mounting holes that are coaxial when the plate is incorporated into the guide body. A pressing member, integrally formed on one of the walls of the guide body, includes an eccentric head which uniformly presses against opposite parts of the edge of an opening of a positioning hole in the reinforcing plate.

The invention relates to a storey noise control structure and a method for constructing the same. The interlayer noise control structure is used for controlling direct vibration noise transferred among slabs of the storeys of an apartment, preventing and absorbing indirect resonance noise in vibration and impact noise transmitting systems among the storeys of the apartment. The interlayer noise control structure comprises a noise absorption floor, grid-shaped anti-vibration components, moisture-proof components, rubber sheets, a spongy sheet and a second horny comb sheet; the noise absorption floor is formed by rubber components clung to slabs; the grid-shaped anti-vibration components are arranged on the noise absorption floor to form preset curved noise source channels; the rubber sheets are overlapped on the moisture-proof components; the spongy sheets are overlapped on the rubber sheets; the second horny comb sheets are overlapped on the spongy sheets and used for filling cement mortar or butter in the case that floor heat supply pipelines are provided; non-woven fabrics are stuck to the upper surfaces and the lower surfaces of the moisture-proof components, and first horny comb sheets containing vermiculite are integrated in the middle parts of the moisture-proof components; silver foil sheets are stuck to the bottom surfaces of the second horny comb sheets; and top floor materials are stuck to the top surfaces of the second horny comb sheets.

The invention relates to a hyperspectral image detection system capable of simultaneously acquiring left-hand and right-hand circular polarization components of a target. The system includes a pre-positioned collimation system, a double-refraction beam splitting system, an imaging lens and an image acquisition and processing system that are sequentially arranged in the direction of incoming rays. According to the invention, a double-channel circular polarization detection system is adopted to simultaneously acquire an interference figure of the left-hand and right-hand circular polarization components of a target, the detection system improves the capability of acquiring a difference circular polarization spectral image as compared with the single-channel polarization imaging spectrometer only capable of detecting a single linear polarization component, avoids quiver noise as compared with the sequence acquisition technology adopting a rotary component, can be used for acquiring the circular polarization spectral image of the target within a wide band range from the ultraviolet band to the infrared band, and has potential application values in the fields of space exploration, earth remote sensing, machine vision, biomedical diagnosis and the like.

A rack-and-pinion steering apparatus in which a steering gear box for transmitting an operation of a steering wheel to road wheels includes a pinion operatively connected to the steering wheel, a rack bar which has a rack meshing with the pinion, and which is operatively connected to the road wheels, a housing slidably supporting the rack bar, a cylindrical rack guide slidably fitted into a guide hole formed in the housing, and a spring member causing the rack guide to abut on a rear part of the rack bar opposite to the rack by biasing the rack guide. A reaction force, which the rack guide receives from the rack bar, acts on the rack guide in such a way as to cause a rotational moment of the rack guide about an axis different from an axis of the rack guide.

The invention discloses a method and a system for automatically compensating torque. The method and the system aim to solve the technical problem of fluctuation of the rotation speed of a permanent magnet motor in the prior art. The method is applied to a permanent magnet motor, and includes determining the frequency difference delta f between a specified frequency f<*> and an actual frequency f of the permanent magnet motor; determining a phase angle theta of a rotor of the permanent magnet motor; determining a torque compensation quantity for the rotor of the permanent magnet motor on the basis of the frequency difference delta f and the phase angle theta, and determining a current instruction value I<d><*> of a shaft d of the permanent magnet motor and a current instruction value I<q><*> of a shaft q of the permanent magnet motor by the aid of the torque compensation quantity; controlling and adjusting the torque of the rotor of the permanent magnet motor from a first value to a second value different from the first value on the basis of the current instruction value I<d><*> of the shaft d and the current instruction value I<q><*> of the shaft q.

The present invention relates to a reclining device of a seat for a vehicle, which makes it possible to prevent backlash between an external gear 12 and an internal gear 22 in stop, resulting in preventing a vibration noise due to movement of the seatback. Further, it is possible to obtain sufficient power from even a small-output motor in operation, by minimizing the gear press angle to increase the operational efficiency. In addition, it is possible to design a compact reclining device by simplifying the shape and reduce the size of assemblies of wedge blocks 70, 120 and cams 80, 110, resulting in reducing the weight and the manufacturing cost and making it possible to freely designing the reclining device, depending on a disposing space.

The invention discloses a motor noise-reducing structure of a dust collector. The motor noise-reducing structure of the dust collector comprises a motor inner cover, wherein the motor inner cover is installed at the outer side of a dust collector motor, a first airflow cavity is formed between the motor inner cover and the dust collector motor, and the first airflow cavity is internally provided with a spiral flow guide plate; a motor outer cover, wherein the motor outer cover is installed at the outer side of the motor inner cover, a second airflow cavity is formed between the motor outer cover and the motor inner cover, the motor outer cover is a double-layer structure, the motor outer cover comprises an outer cover inner ring and an outer cover outer ring, a cavity is formed between theouter cover inner ring and the outer cover outer ring, the cavity is internally provided with a plurality of separating plates, and the separating plates are used for separating the cavity to form aplurality of noise-reducing cavities; and a shock ring, wherein the shock ring is circle-shaped, the shock ring is installed between the motor outer cover and a dust collector housing. The solution uses the noise-reducing structure, has the functions of sound insulation, shock absorption and noise reduction, and is capable of solving the technical problem that the noise of a current dust collectoris larger.

Provided is an intake manifold for an engine, including: a plurality of intake distribution pipes arranged in a side-by-side relation to one another along one side wall; an intake inlet pipe provided in one end wall in a direction of arrangement of the intake distribution pipes; a surge chamber provided inside the intake manifold, and providing communication between the intake inlet pipe and the intake distribution pipes; and an intake guide wall provided integrally with the intake manifold, the intake guide wall extending in the direction of arrangement of the intake distribution pipes from an opening end of the intake inlet pipe, which is open to the surge chamber, to an intermediate portion of the surge chamber, and formed to temporarily guide the air, which has been introduced from the intake inlet pipe into the surge chamber, to a middle portion of the surge chamber. In the intake manifold, one of opposite side surfaces of the intake guide wall is formed as a smooth-and-flat surface which is continuous to an inner surface of the intake inlet pipe, and the other side surface of the intake guide wall, which is on the side of the intake distribution pipes, is provided with a plurality of thinned concave parts and a plurality of ribs remaining between the concave parts, the ribs extending in a height direction of the intake guide wall. This configuration achieves both the demands to make the intake guide wall thin and secure its rigidity, and concurrently to reduce resistance of air taken into the engine by smoothly guiding the air to the middle portion of the surge chamber.

The invention provides a safe sewer well lid. The safe sewer well lid is used for solving the problems of lower safety, poor practicability and lower reliability of a well lid in the prior art. According to the technical scheme provided by the invention, the safe sewer well lid comprises a cover plate, a well base and a foundation base, wherein the cover plate is moveably connected with the well base and the well base is arranged on the foundation base. The safe sewer well lid has the beneficial effects that the maintenance cost is lower than that of the traditional well lid; the well lid is fit with the pavement, so that the stress of the well lid can be shared by the pavement, the lower part of the support base of the well lid can be served as a support and the well lid is dually stressed; the antitheft property and the safety are promoted; the practicability is high and the safe sewer well lid is suitable for most road conditions; a filter screen is built-in, so that the dirt on the pavement can be effectively prevented from entering into a sewer, the sewer can be effectively prevented from being blocked and the filter screen can be conveniently exchanged and cleaned.

The invention provides a slaked lime feeding system in a water processing system. The slaked lime feeding system comprises a lime powder bin. An outlet of the lower end of the lime powder bin is provided with a feeding machine. The feeding machine is connected with a metering conveying machine. The metering conveying machine is connected with a feeder though a pipeline made of transparent materials. The feeder is connected with a lime milk solution. The lime milk solution tank is provided with an automatic sand draining valve and communicated with a lime milk feeding water tank through a lime milk chemical feeding pipe. According to the slaked lime feeding system, through the pipeline made of the transparent materials, the whole process of material conveying and flowing can be observed, and dredging can be conducted conveniently and timely once blocking is found; due to the fact that the automatic sand draining valve is arranged, automatic sand draining can be conducted regularly; the labor intensity of workers is lowered, deposition and blocking caused by sand grains are reduced, the concentration of a lime agent prepared through a limb chemical feeding device keeps stable, the error does not exceed +/-0.5%, precise control over the PH value of feeding points can be guaranteed, and the error does not exceed +/-0.3.

The present invention provides a motor shock-proofing device for vacuum cleaner. Its structure includes motor with paddle-wheel cover external shell, the back surface of the motor external shell is equipped with bearing mounting frame. Said shock-proofing device also includes an independent motor support positioned in the self-body shell and separated from upper shell and lower shell. The supporting frames of two ends of said motor support and seal supporting frame can be used for fixing motor, in which the supporting frames are mounted on the exterior of the paddle-wheel cover external shell, and the bearing mounting frame is inserted into the fixing groove fixed on seal supporting frame. Said invention can effectively prevent vibration and vibration noise produced when the motor is rotated, and can raise the trustworthiness of the product.

A high-speed permanent-magnet synchronous drawing machine without gear for elevator's cage is composed of two permanent-magnet synchronous motors with installing bases, drawing wheel installed between said two motors in bridge mode, and installing accessories. Its advantages are simple structure, high load-bearing power and speed, and no vibration and noise.

A control apparatus for a linear compressor driving system is disclosed for stabilizing the behavior of a piston and thereby protecting the increase in noise vibration caused by collision and the reduction in reliability. This control apparatus stabilizes the behavior of the piston by including: an unstableness detecting means, which directly or indirectly detects that the behavior of the piston is unstable and then outputs an unstableness detection signal; and an unstableness avoiding means which is operated in accordance with the unstableness detection signal.

The invention discloses an integrated permanent magnet variable speed transmission, which comprises an input shaft and an output shaft. A conductor rotor synchronously rotating with the input shaft is installed on the input shaft. A regulator is arranged on the input shaft. An adjustment rod is provided, and the regulator is connected to the conductor rotor through the adjustment rod. The corresponding position of the conductor rotor is provided with a first permanent magnet rotor, and the corresponding position of the first permanent magnet rotor is provided with a second permanent magnet rotor. A modulation ring is sleeved between the first permanent magnet rotor and the second permanent magnet rotor, any one of the modulation ring and the second permanent magnet rotor is fixed, and the other is fixedly connected to the output shaft through a flange Achieve power output. The invention has a variety of structural forms, and is suitable for speed-up and deceleration in various occasions; avoids mechanical fatigue, friction loss, vibration noise, etc., does not need to apply lubricating oil, and has high transmission efficiency; The heat is discharged in time, which improves the service life.

The invention discloses a fanless super-silent split air conditioner, which comprises an outdoor unit with an outdoor coolant circuit and an indoor unit with an indoor coolant circuit communicated with the outdoor coolant circuit; the radiator of the indoor unit is an evaporation fin having a radiator structure; the evaporation fin is mounted on the indoor unit case; and one end of the evaporation fin is connected with an air pipe of an adaptor, while the other end is connected with the liquid pipe of the adaptor. The indoor unit adopts a heat exchanger, which is an evaporation fin with a large surface area, to perform heat exchange with the air fully and conduct cooling and heating functions; the indoor unit does not have any fan, so air flow noises are prevented and a super-silent effect is realized; and the structure of the air conditioner is simpler than that of the conventional air conditioner, and the air conditioner is particularly suitable to be used in places with very strict requirements on noises.

The invention provides a thin type flat rectilinear vibration motor which comprises a casing, a cover plate covering the casing and forming mounting space with the casing, and a vibration assembly hung inside the mounting space through being positioned by elastic support pieces positioned on the two opposite side walls of the casing, wherein the vibration assembly comprises a vibration block and permanent magnets mounted on the vibration block, and can perform reciprocating vibration in the direction roughly parallel to the bottom surface of the casing under the action of the magnetic field force; a coil is mounted above the permanent magnets at the specific clearance position away from the permanent magnets inside the mounting space; an insulation support plate is mounted at the upper part of the coil, and is provided with a lug boss protruding out of the mounting space from the side surface; a wiring terminal in plug-in connection with a main board of a user terminal is mounted on the lug boss; a conducting wire is pre-buried inside the insulation support plate; one end of the conducting wire is electrically connected with the leading wire end of the coil, and the other end of the conducting wire is electrically connected with the wiring terminal.