33results about How to "Play the effect of sound insulation and noise reduction" patented technology

The invention discloses a silent generator set, which comprises a base and a generator set installed on the base. An inspection door is arranged on one side of the base, and guide rails are symmetrically arranged on the base perpendicular to the direction of the inspection door, and are slidably fitted through the guide rails. A silent cover is installed, and the silent cover is a cavity structure filled with liquid inside. The base is located on both sides of the silent cover and is provided with noise reduction plates. fan, the top of the silent cover is provided with a heat dissipation hole at the position facing the air outlet fan, a protective cover is provided above the heat dissipation hole, and the protective cover is in transmission connection with the adjustment mechanism inside the silent cover. The noise generated during the operation of the generating set can be used for sound insulation and noise reduction to avoid noise pollution.

The invention provides a sound-proof device and a vehicle. The sound-proof device comprises a blocking piece and a protection cover, wherein the blocking piece is connected with a through hole in a metal plate of a vehicle body; the protection cover at least covers the outside of parts of the blocking piece. The protection cover at least covers the outside of parts of the blocking piece, so that the phenomenon that the whole blocking piece is exposed in the air is avoided, the blocking piece is protected by the protection cover to a certain degree, and the service life of the blocking piece is prolonged. In addition, when noise spreads from a noise source to the protection cover, the protection cover can have certain effects of insulating sound and reducing noise, and when the noise spreads to the blocking piece, the blocking piece can have an effect of secondary noise reduction, so that the noise is further reduced, the possibility that the noise interferes with a driver is decreased, and the safe running of the vehicle is guaranteed accordingly.

The invention discloses a 110kV class resin cast insulation transformer with a three-phase integrated structure, which comprises a transformer box body and a sunshade box. A heat dissipation cabinet is installed, a sunshade box is installed on the top of the transformer box, two sets of symmetrically arranged drive boxes are installed on the inner bottom wall of the transformer box, and a metal rod is installed on the top of the drive box. A winding box is installed on the top of the rod, and two sets of explosion-proof oil tanks arranged in parallel are installed on the inner bottom wall of the transformer box, and the explosion-proof oil tanks are located in the middle of the two sets of drive boxes. The present invention is provided with a sunshade box, in addition to providing sunshade and rain-shielding services for the device, it can also regulate the sunshade and rain-shielding device, avoiding the phenomenon that the sun-shading and rain-shielding device is overturned due to wind blowing, and ensuring that the sun-shading and rain-shielding device can Provide continuous and stable sunshade and rain protection services for transformer boxes and cooling cabinets.

The invention discloses a three-dimensional numerical control carving machine. The three-dimensional numerical control carving machine comprises a carving machine body and a carving table. An electromagnetic plate is arranged on the surface of the carving table. Air suction holes are formed on the surface of the electromagnetic plate. A scrap collection box is arranged at the lower end of a rear baffle. A wind guide plate is arranged on the side, away from the rear baffle, of the electromagnetic plate. Wind blowing holes are formed in the surface of the wind guide plate. An air blower is arranged in the carving table. A wind discharging pipe is arranged between the air blower and the wind guide plate. A power box is arranged at the bottom end inside the carving table. A positive wire and anegative wire are connected to the two ends of the power box correspondingly. A fixing frame is arranged above the power box. A sucking pump is arranged in the fixing frame. A sucking pipe is arranged on the sucking pump. According to the three-dimensional numerical control carving machine, waste residue and scraps on the surface of the object being carved can be cleared in time and collected anddisposed when the carving machine is working; the condition that waste residue and scraps influence the carving effect is effectively avoided; moreover, different fixing modes can be applied to different objects carved; and applicability is high.

The invention discloses a new type of automobile sound insulation foam reinforcement material, which relates to the field of automobile technology, in particular to a novel automobile sound insulation foam reinforcement material, comprising a first plate and a second foam sheet, the first plate A first foam sheet is installed below, and a second sheet is installed below the first foam sheet, a third sheet is installed below the second foam sheet, and the second foam The sheet is located below the second sheet. The invention provides a sound-insulating foam reinforcement material, which forms a mixed structure with the first plate, the second plate and the third plate, which not only increases the structural rigidity, reduces the structural weight, but also plays the role of sound insulation The effect of noise reduction, and the raw materials are relatively cheap, mainly chopped carbon fiber is mainly mixed with the foam matrix. Large-scale application can also effectively recycle carbon fiber waste. This new type of automobile sound insulation foam reinforcement material can effectively improve The resulting stiffness.

The invention relates to a bionic automobile tail fin housing manufacturing method, which comprises the steps of (1) collecting the features of a sparrow's mouth: drawing the longitudinal profile outer contour curve of a sparrow's mouth on a coordinate paper; fitting a longitudinal profile upper contour curve quasi - equation of a sparrow's mouth (formula 1-1); (2) establishing a tail fin housing bionic model: importing the longitudinal profile upper contour curve quasi - equation into SolidWorks to form a bionic curve EF; establishing a datum plane X=151 at the position passing the point E vertical to the bionic curve EF; and establishing a first contour line L in the datum plane; establishing a second contour line M in the datum plane Y=0 plane passing the point F; sampling the first contour line L toward the second contour line M along the bionic curve EF and a straight line VY; establishing a cutting contour line in the datum plane Z=0 for cutting; and then shelling to obtain the bionic model; (3) preparing the tail fin housing: using a model or printing with a 3D printer directly. The tail fin prepared thereby can improve fuel economy and integral streamline greatly.