34results about How to "Good noise isolation" patented technology

The housing for a centrifugal compressor consists of at least two plastic housing parts for accommodating a compressor wheel and for defining a helical compressor duct, an annular space being formed in the housing between the compressor wheel accommodating compartment and the compressor duct, said annular space encircling the compressor wheel and at least one stabilizing element being introduced into it.

A two-channel air-cooled small gasoline generator, comprising a case (1), an engine assembly (2), a silencer (3) and a magneto assembly (4) with a fan, wherein the engine assembly (2), the silencer (3) and the magneto assembly (4) are arranged in the case. The gasoline generator further comprises: a first air guiding hood (21), arranged on the engine assembly (2) in a coating mode; an air duct (32), one end of the air duct being connected to the first air guiding hood (21), and the other opposite end of the air duct being communicated with the outside; a second air guiding hood (31), arranged on the silencer (3) in a coating mode and provided with an air outlet (311) communicated with the outside; and a third air guiding hood (41), arranged on the magneto assembly (4) in a coating mode and further communicated with the second air guiding hood (31). In the generator, the engine is cooled at high efficiency, thermal power attenuation of the engine is effectively reduced, and the output of the magneto is efficient; accordingly, high-efficiency operation of the generator is guaranteed, and a good noise isolation effect is achieved with the sealed air duct.

The present invention relates to a floor impact noise isolator for construction and a method for constructing a floor using the same. The present invention provides a floor impact noise isolator for construction, including a noise isolating body; and a reinforcing member formed with an inflow hole which is filled with mortar. In addition, the present invention provides a method for constructing a floor of a building, comprising the steps of installing the floor impact noise isolator according to the present invention; and introducing mortar into the inflow hole formed in the reinforcing member of the noise isolator. According to the present invention, the noise isolating body is supported by the reinforcing member and the inflow hole formed in the reinforcing member is filled with mortar to thereby have excellent strength and prevent a crack from occurring in the mortar layer. Further, a local load distribution is transformed into a surface load distribution, thereby improving a noise isolation property.

The invention relates to a bearing device (10) for a drive unit (1), wherein the drive unit (1) has a drive motor (11) which interacts with a transmission element (15) via a drive shaft (12) with multiple bearings, having a first bearing (18) which is arranged on the opposite side of the drive motor (11) with respect to the transmission element (15), a second bearing (19) which is arranged between the drive motor (11) and the transmission element (15), and a third bearing (20; 20a; 20b; 20c) which is arranged on the side of the transmission element (15) which faces away from the drive motor (11), wherein the third bearing (20; 20a; 20b; 20c) is arranged so as to be movable in a direction perpendicular to the longitudinal axis of the drive shaft (12). According to the invention there is provision that the third bearing (20; 20a; 20b; 20c) is embodied as a single-piece component which both accommodates the drive shaft (12) at its end region (30) and is accommodated in a receptacle (24) of a positionally fixed element, in particular a housing element.

The invention relates to a hot melt waterproof coating mainly used for water proofing of floors such as high-density floors, multilayer solid wood composite floors and solid wood floors. The hot melt waterproof coating is characterized by being prepared from the following raw materials in percentage by mass: 50% of paraffin, 8% of dried grease, 5% of a fatty acid triglyceride mixture, 2% of a silicone oil defoamer, 1.5% of triethylhexyl phosphoric acid, 1.5% of polyacrylamide, 13% of synthetic resin, 12% of polyimide resin, 3% of a toner and 4% of pigment. The hot melt waterproof coating has a remarkable waterproof effect and also has the characteristic of good noise insulation effect; in addition, the hot melt waterproof coating is good in permeability, high in absorption and drying speed, nontoxic and tasteless, can be applied and packaged at the moment, and is suitable for any wax coating equipment.

The invention discloses a transformer partial discharge ultrahigh frequency locating analyzer and a locating analyzing method thereof. The transformer partial discharge ultrahigh frequency locating analyzer comprises a signal conditioning unit (1), a signal processing unit (3), a precise time-delay unit (2), wherein the signal conditioning unit (1) is used for receiving the discharge signals collected by a probe and carrying out conditioning on the received discharge signals, the signal processing unit (3) is used for calculating a discharge distance, the precise time-delay unit (2) is used for carrying out time delay on the conditioned discharge signals, and the refined time-delay unit (2) is further connected with the signal processing unit (3), sends the delayed signals to the signal processing unit (3), and receives the time-delay control signals of the signal processing unit (3). According to the transformer partial discharge ultrahigh frequency locating analyzer and the locating analyzing method thereof, a normal sampling circuit can carry out sampling analysis on high-frequency discharge signals through the time-delay technology, and the transformer partial discharge ultrahigh frequency locating analyzer and the locating analyzing method thereof have the advantages of being low in circuit manufacturing cost, good in stability coefficient, convenient to control and the like.

The invention provides damping paint for an engine. The damping paint comprises raw materials in parts by weight as follows: 290-310 parts of plasticizing acrylic emulsion, 35-45 parts of antimony (III) oxide, 35-45 parts of melamine, 18-22 parts of active magnesium hydroxide and 138-162 parts of functional filler. The damping paint for the engine has good flame retardance, noise isolation property and resistance to acid, alkali and salt spray, and meets application demands of the engine.

The invention relates to an air quality regulation method having fresh air exchange and purification functions and belongs to the field of household air conditioners. The air quality regulation method aims to solve the problems existing in indoor air through two function integration modes of an air conditioner and an indoor air purifier. The air quality regulation method comprises the steps that an axial air compressor pumps in and compresses outdoor air; the fresh air is led into a plate heat exchanger through a guide tube; air temperature adjustment and control are performed therein; then, the air flows into an inner cavity of an air transmission unit, enters an eddy current air multiplication humidifier through a hollow shaft of the air transmission unit and is blown into a room under the action of the eddy current air multiplication humidifier; original indoor foul air is extruded out of the room by the continuous clean air, so the purposes of fresh air exchange and air purification are achieved. Meanwhile, the hollow shaft of the air transmission unit drives the eddy current air multiplication humidifier (2) to rotate, the rotation direction comprises two degrees of freedom, and therefore 360-degree air discharge without dead angles is achieved.

The invention discloses an air conditioner with fresh air exchange and purification functions, belongs to the field of household air conditioners, and aims at solving the problems existing in a way that an air conditioner and an indoor air purifier are adopted in a function integration mode to improve indoor air. The air conditioner with fresh air exchange and purification functions comprises an indoor unit and an outdoor unit, wherein the indoor unit is designed into a robot shape; a central control unit is arranged inside the head of a robot; indoor air index sensor groups are arranged in ears of the robot; two arms of the robot are turbo air multiplication humidifiers respectively; a humidification system water tank is arranged at the back of the trunk of the robot; an air transmission unit is arranged inside the chest of the trunk of the robot; a plate type heat exchanger is arranged at the lower part of the trunk of the robot; an axial flow compressor, a radiating fan, a compressor and a radiator are arranged in the inner cavity of a shell of the outdoor unit; the axial flow compressor sucks air from bottom to top; pressurized air enters the indoor unit; the temperature of the pressurized air is regulated by the plate type heat exchanger; then the pressurized air is transmitted to the two turbo air multiplication humidifiers by the air transmission unit; and rotation outlet air is formed.

The invention relates to an electric power engineering transformer electromechanical installation platform. The platform comprises a base used for placing a transformer and supporting columns locatedon the periphery of the base; the supporting columns are circumferentially distributed around the central axis of the base at equal angles; fixed pulleys are arranged at the top ends of the supportingcolumns and provided with connecting ropes in a striding mode; one end of each connecting ropes are connected with the base, and the other end of the connecting rope is connected with multiple balancing weights; locking pieces abutting against the connecting ropes are arranged on the supporting columns. With the above technical schemes adopted, the base and the transformer are lifted through thebalancing weights, the transformer is separated from the ground, the base and the transformer are in a dynamic balance state by adjusting the balancing weights, and the sliding friction force of the connecting ropes is reduced through the fixed pulleys. Compared with a mode of directly placing the transformer on the ground, the flexible connection mode greatly reduces vibration and noise, therebyfacilitating the improvement of the living comfort of surrounding dwellings. The locking pieces play a role in facilitating adjustment and installation.