12results about How to "Reduce diffuse" patented technology

This utility model relates to a noise reduction structure for a DC motor, wherein the noise reduction structure (1) is disposed within a cavity for accommodating a commutator (2) and close to the sound source. The noise reduction structure (1) can be a honeycomb structure, a square structure, a circular structure, or a regular polygonal structure, and can be disposed on the bottom surface of the cavity, or simultaneously on the sidewalls and bottom surface of the cavity. The noise reduction structures (1) can be evenly distributed on the bottom surface and sidewalls of the cavity, or staggered. In addition, the noise reduction structure (1) can also be disposed within the cavity of a gearbox (5), including at the bottom of the gearbox cavity (6), or simultaneously on the bottom and cavity walls of the gearbox cavity (6). Using this noise reduction structure for a DC motor, the sound waves generated by the sound source are effectively reflected and canceled out by the noise reduction structure, thus reducing the noise of the DC motor and possessing certain practical value.

The invention relates to the field of peanut protein powder feeding, in particular to a peanut protein powder feeding device capable of preventing powder from flying, which comprises a support table, and a feeding pipe is obliquely mounted above the support table. The handle is rotated to drive the rotating frame to rotate, so that the opening degree of the baffle is controlled to accurately adjust the feeding amount. In the process, the rotating frame synchronously drives the material guiding plate, the first dust blocking plate and the second dust blocking plate to cooperatively act through the connecting arm, and dynamic matching of the dust suppression structure and the discharging state is achieved. The inclination angle of the material guide plate is automatically adjusted according to the feeding amount, material impact is effectively relieved, and powder flying is restrained from the source; the dust blocking plate set is adjusted in a self-adaptive mode according to the angle of the material guiding plate, so that a reasonable distance between the air suction cover and falling materials is kept, and meanwhile diffused dust is efficiently collected. According to the linkage system, while the feeding efficiency is guaranteed, dust diffusion is remarkably reduced, the working environment is improved, raw material waste is reduced, and operation safety and overall coordination are improved.

The utility model discloses a cutting device for glass fiber board production, which belongs to the technical field of glass fiber board production equipment and comprises a cutting support box for supporting a glass fiber board, and the inner top wall of the cutting support box is communicated with an air outlet box for dust to enter during glass fiber board processing. Cross-shaped grooves used for sliding are formed in the two sides of the interior of the air outlet box, springs are connected to the inner bottom walls of the two cross-shaped grooves, one ends of the springs are connected with cross-shaped plates, the cross-shaped plates are arranged in the cross-shaped grooves in a sliding mode, and second filter plate frames used for supporting are installed on the peripheries of the cross-shaped plates. According to the cutting device for glass fiber board production, the dust treatment capacity can be improved, the situation that dust pervades in a workshop is reduced, the health of operators is guaranteed, normal operation of equipment is guaranteed, tool abrasion is reduced, and the cutting precision and the product quality are improved.

The invention provides an epitaxial method for improving the width of a transition region of a double-layer low-resistance silicon epitaxial wafer of an overweight B-doped substrate and the epitaxial wafer obtained by the epitaxial method. The method mainly comprises the step of sequentially arranging a P-type epitaxial inner layer, an N-type buffer layer and a P-type epitaxial outer layer on the B-doped substrate. The method has the advantages that compared with an existing direct epitaxial process, the phenomenon that impurities such as B in the overweight B-doped substrate are diffused to the epitaxial layer can be remarkably reduced by optimizing the epitaxial structure and the process design, and the electrical parameter stability of the epitaxial layer is improved; compared with a traditional epitaxial scheme adopting a P-type buffer layer or an intrinsic Si buffer layer, the epitaxial structure has the advantages that the width of the transition region is greatly reduced, the transition region is steeped, and the voltage resistance and the electrical parameter consistency of the component are improved.

The utility model discloses a kind of anti-fogging guide wheels, belong to wire cutting equipment field.The anti-fogging guide wheel includes: bearing seat, guide wheel and anti-fogging outer sleeve, guide wheel and anti-fogging outer sleeve are installed in bearing seat, anti-fogging outer sleeve is set in guide wheel, for making cutting fluid on guide wheel splash to anti-fogging outer sleeve.The utility model makes cutting fluid on guide wheel be splashed to anti-fogging outer sleeve and gather, reduce atomization diffusion situation, solve the problem that guide wheel of prior art does not prevent and control cutting fluid atomization diffusion.

The application provides a preparation method of a single crystal thin film with low defects, and at least comprises the following steps: step S1, providing a substrate and placing the substrate in a reaction cavity; the pressure in the reaction cavity is less than 20 tor, and the process temperature of the substrate is lower than 900 DEG C; step S2, introducing a first deposition gas into the reaction cavity to form an N-type single crystal thin film on the surface of the substrate; the first deposition gas comprises a raw material gas and an N-type doping gas; step S3, switching to introduce a second deposition gas into the reaction cavity to form a P-type single crystal thin film on the surface of the N-type single crystal thin film; the second deposition gas comprises a raw material gas and a P-type doping gas; and the raw material gas is a silicon source precursor or a germanium source precursor. The preparation method can reduce the defects of the single crystal thin film and improve the film quality.

The utility model discloses a needle warming moxibustion device which comprises a moxibustion tank of a semicircular tank body structure, an opening is formed in the upper end of the moxibustion tank, a mounting frame is connected to the upper end of the moxibustion tank, and the moxibustion tank and the mounting frame form a main external structure of the needle warming moxibustion device. A base is installed at the bottom end of the moxibustion tank, and moxibustion holes are evenly formed in the base. According to the needle warming moxibustion device, through installation of the moxibustion tank and the installation frame, conditions are provided for a regulation and control space of the placement height of a moxa stick, the moxa stick is clamped by a limiting sleeve arranged in the installation frame and anti-skid sleeve teeth arranged in the installation frame, and the anti-skid sleeve teeth are inserted into and attached to the surface of the moxa stick along with the moxa stick, so that the moxa stick is fixed to the height position in the moxibustion tank; the moxibustion pot can well fix moxa sticks and moxibustion parts in the moxibustion applying period, the moxa sticks are prevented from shaking or shifting in the combustion process, therefore, the accuracy and stability of moxibustion are guaranteed, and the risk of potential safety hazards such as fire disasters caused by falling of the moxa sticks is reduced.

The blanking dustproof structure comprises a blanking hopper, a stock bin is arranged below the blanking hopper, a plurality of blanking openings are formed in the stock bin at intervals in the length direction of the stock bin, heightening walls are arranged at the positions, on the two sides of the blanking openings, above the stock bin, and automatic reset plates are hinged to the upper portions of the heightening walls. The tops of the automatic reset plates on the two sides are closed, the blanking hopper enters the position between the two automatic reset plates from the side face and opens the automatic reset plates, and materials fall into the stock bin from the blanking opening. According to the utility model, the heightening walls are arranged on the two sides of the stock bin, so that materials are effectively prevented from being thrown during the reciprocating motion of the blanking hopper. And an automatic reset plate is arranged on the heightening wall, so that when the blanking hopper carries out blanking, the periphery of the blanking hopper can be effectively shielded, and the phenomena of material splashing and dust diffusion are obviously reduced. A plurality of independent automatic reset plates are adopted, during blanking operation, the blanking hopper only needs to open the automatic reset plates at the corresponding positions, the automatic reset plates at the other positions are still closed, and dust can be prevented from flying to the maximum extent.

A bondless phase-order tracking method based on deep time-frequency refinement includes: 1) constructing several non-stationary simulated vibration signals; 2) constructing an ideal time-frequency binary mask; 3) constructing a multi-scale one-dimensional complex-valued convolution module to perform generalized time-frequency transformation on the non-stationary simulated vibration signals to obtain an initial two-dimensional time-frequency representation; 4) constructing a deep time-frequency refinement model, using the initial two-dimensional time-frequency representation as input and the ideal time-frequency binary mask as supervision labels to construct a dataset; 5) inputting the initial two-dimensional time-frequency representation into the deep time-frequency refinement model to obtain prediction data, and back-optimizing the deep time-frequency refinement model based on a loss function until a trained deep time-frequency refinement model is obtained; 6) acquiring one-dimensional vibration signals during the actual operation of rotating machinery and inputting them into the trained deep time-frequency refinement model to obtain a refined time-frequency representation, thereby obtaining the order tracking result. This invention provides a more stable and efficient signal analysis method.

The utility model belongs to the technical field of machining tools, particularly relates to a grinding tool for machining, and provides the following scheme aiming at the problem that the grinding shape of a workpiece is relatively fixed due to the fact that the position of a part of grinding discs is fixed in the machining process of a mechanical workpiece by a part of existing machining grinding tools. Comprising a machine frame, a supporting frame fixedly installed above the machine frame and a top column fixedly installed on the inner side of the supporting frame. A hydraulic cylinder is arranged on the installation frame, a sliding block and a sand disc are arranged on the sliding block, a bearing frame is fixedly installed on one side of the supporting frame, and a grinding mechanism is arranged in the bearing frame. The hydraulic cylinder pushes the installation frame, so that the driving motor and the threaded rod which are located on the installation frame and the sliding block and the sand disc which are located on the threaded rod move vertically; and the driving motor and the screw rotate to drive the sliding block and the abrasive disc to move transversely, so that the abrasive disc can machine the workpiece more precisely.

The invention discloses a self-adaptive heat preservation and shock absorption cell transport case and a use method, the self-adaptive heat preservation and shock absorption cell transport case comprises a cover body and a shell, the shell is internally provided with a sample chamber of a honeycomb briquette type structure, the sample chamber is internally provided with a plurality of sample cavities, the inner side walls of the sample cavities are symmetrically provided with clamping assemblies, and sample tubes filled with cells are placed in the sample cavities; each sample cavity is sequentially provided with a fluff layer, a vacuum layer and a compression-resistant thermal insulation layer from inside to outside, the compression-resistant thermal insulation layer is water-containing small balls or silica gel balls filled in the outer wall of the sample chamber, the vacuum layer is an ultra-micro bubble layer formed by filling a foaming material along the inner wall of the sample chamber, and a metal coating is arranged on the outer wall of the vacuum layer. The villus layers are arranged on the inner side wall of the metal coating and wrap the sample tube, the clamping assemblies are dispersed between the villus layers, the villus layers comprise long villus and short villus, and the short villus is densely distributed between the adjacent long villus to form an air layer. Through the synergistic effect of multi-layer heat preservation and self-adaptive clamping, accurate protection in the whole process of cell transportation is achieved.

The present application relates to the field of lighting technology, and provides a composite reflector lampshade, comprising: a lens, which is provided with an opening at the bottom and surrounds a light-emitting area for surrounding a light source, light emitted by the light source passes through the lens in a direction away from the opening of the lens, and the light emitted by the light source forms different light arc widths corresponding to different beam angles after being refracted by the lens with different beam angles; a reflecting cup, which is arranged around the outer periphery of the lens, and the inner surface of the reflecting cup is distributed with multiple groups of reflecting protrusions, the surface of the reflecting protrusions is provided in a curved surface, and is used for reflecting the light emitted by the light source and refracted by the lens, so that the light passing through the lens with different beam angles respectively forms different light arc widths corresponding to the beam angles. The present application also provides a lighting lamp, which solves the defect that the actual light arc width of the wall washing lamp does not correspond to the beam angle in the prior art, realizes the mutual correspondence of the light arc width and the beam angle, and improves the lighting effect and user experience of the wall washing lamp.