39results about How to "Reduce suction noise" patented technology

The present invention relates to a blower for vehicles, which includes guide walls formed on a bypass passageway formed between a scroll case and an outer case to send the indoor air and the outdoor air to a lower suction opening of the scroll case, thereby reducing suction noise by guiding a uniform flow of air introduced into the lower suction opening, preventing deformation of the outer case, and preventing a droop of the air filter by supporting a lower portion of an air filter when an intake duct injection-molded in a vertically parted mold is applied thereto.

The present invention relates to a blower for vehicles, which includes guide walls formed on a bypass passageway formed between a scroll case and an outer case to send the indoor air and the outdoor air to a lower suction opening of the scroll case, thereby reducing suction noise by guiding a uniform flow of air introduced into the lower suction opening, preventing deformation of the outer case, and preventing a droop of the air filter by supporting a lower portion of an air filter when an intake duct injection-molded in a vertically parted mold is applied thereto.

The invention relates to a drive assembly of a pulsator washing machine. The drive assembly comprises a mounting tray. A spindle and a shaft sleeve sleeved on the spindle are rotatably disposed on the mounting tray. A reduction electromagnetic clutch mechanism is disposed between the spindle and the shaft sleeve. A drive mechanism is disposed on the lower portion of the spindle. The reduction electromagnetic clutch mechanism is an electromagnetic clutch mechanism having a function of electromagnetic clutch planetary gear reduction. The reduction electromagnetic clutch mechanism is provided with a planetary gear component and an electromagnetic clutch component. The drive mechanism is an external rotor direct-drive motor comprising a rotor and a stator. The stator is fixedly connected to the mounting tray. The rotor is fixedly connected with the spindle. The spindle and the electromagnetic clutch and planetary gear reduction mechanism are directly driven by an external rotor motor, and accordingly defects such as complex ratchet and pawl structure, large size and low control accuracy in the prior art are broken through. Electromagnetic clutching is high in transmission efficiency, accurate in transmission and clutching control and low in noise; the whole drive assembly is light in weight, pull-in voltage and holding voltage are less demanded in electromagnetic clutching, and energy consumption is reduced effectively.

The present invention relates to a blower for vehicles, which includes guide walls formed on a bypass passageway formed between a scroll case and an outer case to send the indoor air and the outdoor air to a lower suction opening of the scroll case, thereby reducing suction noise by guiding a uniform flow of air introduced into the lower suction opening, preventing deformation of the outer case, and preventing a droop of the air filter by supporting a lower portion of an air filter when an intake duct injection-molded in a vertically parted mold is applied thereto.

The present invention discloses a method and an apparatus for producing a woven material from tape-like warps and wefts, comprising a warp supply source for tape-like warps; a shed forming device to form a shed by said warps; a weft insertion device for inserting tape-like weft in the shed formed by said warps; and a take-up device for taking-up the produced woven material. Each of the warps extend in warp paths between the warp supply source and the take-up device. Further, the shed forming device comprises an air pressure system arranged to apply pressure on the face of at least some of the warps in an intermediate position of the warp paths, between the warp supply source and the take-up device, the applied air pressure being sufficient to displace said at least some warps in essentially the thickness direction of the tape-like warps.

The invention relates to an intake apparatus for internal combustion engine. The intake apparatus including two intake ducts and a flap mechanism disposed in one of the two intake ducts, the flap mechanism including a main flap, a damper flap, a damper chamber cooperating with the damper flap to form a damper space, and a biasing member biasing the main flap in a closing direction. When the main flap is located in an angular range between the fully closing position and a predetermined opening angle, a peripheral edge of the damper flap is opposed to an inner wall surface of the damper chamber with a fine clearance to thereby render the damper space substantially closed. When the main flap is located with an opening angle larger than the predetermined opening angle, a communication passage to open the damper space is formed between the inner wall surface of the damper chamber and the peripheral edge of the damper flap.

The invention discloses an air suction structure of a rotary cylinder piston compressor and the rotary cylinder piston compressor, belongs to the technical field of compressors, and is designed to solve the problem that the existing structure has a limited muffler effect. The air suction structure of the rotary cylinder piston compressor disclosed by the invention comprises a cylinder liner, wherein a refrigerant inlet pipeline is arranged on the side wall of the cylinder liner; the refrigerant inlet pipe is communicated with the inner chamber of the cylinder liner and a dispenser; a muffler chamber main body is arranged on the upper end surface, the lower end surface and / or the side wall of the cylinder liner; a neck passage is connected between the side wall of the refrigerant inlet pipeline and the muffler chamber main body; a sealing cover is arranged on the outer side surface of the muffler chamber main body. According to the air suction structure of the rotary cylinder piston compressor and the rotary cylinder piston compressor disclosed by the invention, the air suction pressure pulsation is reduced, so that the air suction of the rotary cylinder piston compressor is steadier and smoother; the overall noise level is reduced; the loss of the air suction power consumption is reduced, and the overall efficiency of the rotary cylinder piston compressor is improved.

The invention discloses a gas suction and discharge structure for a compressor. The gas suction and discharge structure comprises a crankcase (1), a valve plate seal gasket (2), a gas suction valve disc (3), a valve plate (5), a gas discharge valve disc (6), a cylinder cover seal gasket (7), a cylinder cover (8), a mounting screw (9) and a gas suction silencer (11). The end face of a cylinder body(17) of the crankcase (1) is provided with a step hole (18), a valve plate locating hole (14) and a first exhaust outlet (12). The rear end face of the valve plate (5) is provided with a round boss (57), a locating column (52) and a fifth exhaust outlet (51). An exhaust cavity (81) and a gas suction cavity (83) are formed in the cylinder cover (8). A gas discharge valve disc limiting column (84)is arranged in the exhaust cavity (81). The bottom face of the gas suction cavity (83) is provided with an oil leakage hole (85) and two gas inlet pipes connected with a gas outlet pipe of the gas suction silencer (11). Through the gas suction and discharge structure, gas leakage can be reduced, gas transfer efficiency of the compressor is promoted, gas suction noise of the compressor is lowered,and the gas suction and discharge structure has wide market prospects.

Provided is an air induction device for an automobile capable of reducing suction noise generated by the suction air to improve stillness in driving. The air induction device for an automobile includes: a main body having a suction manifold mounted on an engine, a throttle body installed in the suction manifold, an air cleaner connected to the throttle body by an air suction duct, an air suction pipe connected to the air cleaner to introduce the external air and having an opening installed at a rear part of a radiator, a suction port formed at a front part thereof, and a space formed therein;a discharge pipe formed at one side of the main body and connected to the suction pipe to be in communication with the space; ; and a resonance part formed inside the main body to remove noise generated during air suction, characterized in that the resonance part is formed of a cylindrical pipe and has a closed end opposite to the discharge pipe and an oval opening formed at the other end toward the discharge pipe, and the opening is formed to be connected to an inlet port of the discharge pipe and installed at a rear surface inside the main body to be opposite to the suction port of the mainbody.

The invention provides an air valve noise suppression system and method for a rail transit oilless air compressor. The air valve noise suppression system comprises an air filter, a cylinder cover, a crankcase and an air inlet pipeline. An air inlet of the crankcase communicates with an exhaust port of the air filter, and an air outlet of the crankcase communicates with the cylinder cover through the air inlet pipeline. The cylinder cover comprises a cylinder air inlet, a cylinder air outlet, a suction cavity and an exhaust cavity. The cylinder air inlet communicates with the suction cavity, and the cylinder air outlet communicates with the exhaust cavity. The suction cavity and the exhaust cavity are both annular inner cavities arranged in the cylinder cover. The suction cavity is arranged between the inner ring side face of the exhaust cavity and the central axis of the cylinder cover. The air valve noise suppression system is simple in structure, the crankcase is used as a buffer tank of the air inlet pipeline through the creative design, and suction noise generated before inlet air flow enters a cylinder can be lowered by absorbing noise on the air valve suction side multiple times in a labyrinth mode. In addition, through the unique design of the cylinder cover, suction noise can be prevented from coming out, and the high-frequency spectrum is lowered.

The invention relates to a secondary air supplying device for a motorcycle to facilitate the maintenance of an air cleaner for a secondary air, to eliminate the necessity of mounting an excess component to connect a suction tube to a frame pipe, and to reduce a cost, in which the part of a passage for supplying the secondary air to an exhaust system of an engine mounted in a body frame having the frame pipe having the frame pipe is formed in the frame pipe. The downstream end of the suction tube 64 is connected to the suction port of the air cleaner 3 for the secondary air supported to the body frame 25 disposed at the outside of the frame 25, and the upstream side of the tube 64 is inserted into the end opening of the frame pipe 30 by interposing a soundproof material 65 between the tube 64 and the inner surface of the pipe 30.

The invention relates to a safety brake of an elevator tractor, which comprises a tank plate of windings, an armature, a compression spring which is positioned on one end of a spring hole of the tank plate and is in contact with one end surface of the armature, a tongue plate installed on the other end surface of the armature, and a friction piece. The safety brake is characterized in that the number of the windings is 2n; and the windings are symmetrically or uniformly distributed on the tank plate, wherein n is a natural number. The invention has high braking performance, low cost and low noise.

Six block rows extending in a tire circumference direction are formed by a central narrow groove, side main grooves and left and right lug grooves in a tread surface, the rotating direction of which is specified to one direction. The average tire circumference direction length of the blocks of the block rows in the center area of the tread surface is 4 to 5 % of the tire full circumference length on the tire center line. Each of the left and right lug grooves is formed as a tapered groove having wider groove width at the tire center line. Left and right main groove portions located between the lug grooves are formed as inclined grooves inclining so as to expand towards the reverse direction to the rotating direction of the tire. Subgrooves crossing the blocks in the tire width direction are formed on the surfaces of the blocks in the shoulder areas.

The invention provides a suction muffler, a compressor, and a refrigerator, wherein the suction muffler includes a casing, the casing is configured with an air inlet and an exhaust port, and the inner cavity of the casing is provided with A baffle, the baffle divides the inner cavity into an upper cavity corresponding to the exhaust port and a lower cavity corresponding to the air inlet, and the baffle is configured with a The multiple through holes of the cavity also include multiple oil-gas separation covers, and the multiple oil-gas separation covers are respectively one-to-one covered on the multiple through holes and are located on the side of the partition facing the upper chamber. On the side, the oil-gas separation cover has a flow hole to pass through the upper chamber and the lower chamber. According to the suction muffler, compressor, and refrigerator of the present invention, the amount of oil carried by the suction of the cylinder can be reduced, and at the same time, the resistance of the suction air flow and the noise of suction can be reduced, so that the suction is more uniform and smooth.