36results about How to "Reduce ventilation loss" patented technology

An exhaust apparatus includes a lower side exhaust duct and an upper side exhaust duct which are branched vertically, and in that the lower side exhaust duct is extended toward the lower side of the vehicle from an exhaust outlet portion of the air-cooled fuel cell stack, and the downstream end portion of the lower side exhaust duct is opened at a lower portion of the front compartment, while the upper side exhaust duct is extended toward the upper side of the vehicle from an upper portion of an outer wall of the lower side exhaust duct, the outer wall extending toward the lower side of the vehicle, and the downstream end portion of the upper side exhaust duct is opened between the rear end portion of the front hood and the front end portion of the front window.

The invention is directed to a vehicle air-conditioning apparatus in which supercritical refrigerant passing through a refrigerant heat releasing passage P of a heat releasing device 2 exchanges heat with refrigerant cooling air introduced from an air introduction surface F of a heat releasing device 2 to be cooled, and the cooled refrigerant exchanges heat with air to be introduced into a passenger compartment by an evaporator 5. Since at least a part of discharge air discharged from an inside of a passenger compartment is introduced from an air introduction surface F of the heat releasing device 2 as a ventilation loss utilizing air, ventilation loss utilizing air can be used as a part of refrigerant cooling air. It is constituted such that the ventilation loss utilizing air is introduced to the downstream side area f of the refrigerant heat releasing passage P in an air introduction surface F of the heat releasing device 2. Thus, in a vehicle air-conditioning apparatus having a supercritical refrigerant refrigeration cycle, ventilation loss can be reduced while improving refrigeration performance.

In a turbine for an exhaust gas turbocharger having a turbine housing which has a first and a second spiral channel with the second spiral channel extending over a wrap angle range of less than 360 degrees of a turbine wheel of the turbine, and the first spiral channel having a larger wrap angle range than the second spiral channel and the spiral channels being arranged adjacent each other in at least one angular range which includes the wrap angle ranges, the nozzle has an overall nozzle width via which exhaust gas is admitted to the turbine wheel over a respective partial nozzle width of the spiral channels wherein the partial nozzle width of the first spiral channel is greater than the partial nozzle width of the first spiral channel in the first angular range, at least in a further angular range of the wrap angle range which is different from the at least one angular range.

The invention provides a wind driven generator, comprising a rotor and a stator frame which are mutually matched, wherein a communicated circular air gap is formed between the rotor and the stator frame; the external circumference surface of the stator frame is provided with a circle of annular groove; the two sides of the annular groove are respectively provided with a baffle; the interior of the annular groove is axially provided with vertical rib plates along a stator; the vertical rib plates divide the annular groove into a plurality of ventilating cavities; the ventilating cavities are cold air cavities or hot air cavities; the cold air cavities and the hot air cavities are alternately arranged on the external circumference surface of the stator frame; and the bottoms of each cold air cavity and each hot air cavity are respectively connected with a cold air inputting channel and a hot air outputting channel. According to the wind driven generator provided by the invention, each cold air area channel and each hot air area channel are distributed crosswise, have clear and definite functions and do not interfere with each other; the cooling effect is good, the needed cooling airquantity is greatly reduced, and the work efficiency of the generator is improved; and the wind driven generator has a compact structure, is convenient to structurally design, and has good promotion value.

The invention relates to a large air-cooled turbo-generator with a circumferential mixed ventilation cooling structure, which belongs to the technical field of motors. The large air-cooled turbo-generator can solve the problem that the existing cooling technology of the turbo-generator and the improvement technology of the single unit capacity can not be simultaneously integrated. The large air-cooled turbo-generator comprises a stator, a rotor and a housing, wherein an air gap is arranged between the surface of an outer circle of the rotor and the surface of an inner circle of the stator, the stator is covered in the housing, the large air-cooled turbo-generator further comprises four axial rubber separators and a cooler, the four axial rubber separators are uniformly arranged between the surface of the inner circle of the housing and the surface of the outer circle of the stator along the circumferential direction, two opposite cold air areas and two opposite hot air areas are formed, and the two opposite hot air areas are communicated with an inlet of the cooler. The large air-cooled turbo-generator with the circumferential mixed ventilation cooling structure is used for cooling the large air-cooled turbo-generator.

The invention discloses a ventilation adjustable hydraulic generator rotor bracket. The ventilation adjustable hydraulic generator rotor bracket comprises an inner central body and an outer central body; the inner central body is composed of a lower flange surface of the inner central body, a cylinder of the inner central body, a rib plate of the inner central body and an upper flange surface of the inner central body in an installing and welding manner; the outer central body is composed of an inner wind-blocking annular plate, a cylinder of the outer central body and a rib plate of the outer central body in an installing and welding manner; the inner wind-blocking annular plate, the lower flange surface of the inner central body and the upper flange surface of the inner central body are in splice welding; an inclined web plate and a straight web plate are arranged outside the cylinder of the outer central body; an outer annular plate and a middle annular plate are welded on the straight web plate; the parts of the outer annular plate and the middle annular plate extending out of the straight web plate are welded on the inclined web plate; and the outer annular plate, the straight web plate and the middle annular plate are welded on a large vertical rib. The ventilation adjustable hydraulic generator rotor bracket disclosed by the invention has the active effects that: the problem that the traditional structure is poor in ventilation adjustability can be overcome; the ventilation loss of a generator can be reduced; the efficiency of the generator is increased; adverse effects on oil mist pollution are reduced; and simultaneously, mechanical strength requirements of the structure are satisfied.

A rotating electric machine (1) having a stator (2) provided with windings and a rotor (4) provided with windings and with salient poles (10) forming pole gaps (9) between the pole shoes (12) of the poles (10), which rotor (4) is arranged to be cooled by air flowing axially through the pole gaps (9) of the rotor (4), wherein each pole gap (9) between the pole shoes (12) is covered by at least one covering member (14) and that the air gap (15) is equipped with a sealing ring (16) to limit axial air flow.

The invention discloses a method for controlling the heat dissipation system of a large-capacity generator set, which comprises the following steps: when the runner drives the rotor to rotate to generate electricity, the rotating shaft on the rotor drives the centrifugal fan blades to rotate, thereby inhaling the cold air at the air inlet end, and the cold air passes through The ventilation holes on the yoke radially flow out and spray onto the stator to absorb heat and become hot air, and then discharge out through the air outlet; detect the temperature difference ∆T between the air end and the air inlet end, and compare it with the set temperature difference δT For comparison; when ∆T≤0.95δT, reduce the friction between the shaft and the centrifugal fan blades to reduce the speed of the centrifugal fan blades; when ∆T≥1.05δT, increase the friction between the shaft and the centrifugal fan blades Force to increase the rotational speed of centrifugal fan blades, when 0.95δT<∆T<1.05δT, keep the above friction constant. The invention can significantly reduce the ventilation loss, improve the heat dissipation and cooling efficiency, ensure the uniform heat dissipation of the generating set, and avoid the complex structure of the heat dissipation system.

A ventilating duct structure of a stator core comprises a plurality of repetitive structural units, wherein each repetitive structural unit is formed by a channel which is defined by an upper ventilating slot piece, a lower ventilating slot piece and two adjacent ventilating duct supporting components; one end of each ventilating duct supporting component is connected with the upper ventilating slot piece, and the other end of each ventilating duct supporting component is connected with the lower ventilating slot piece; the upper ventilating slot piece or the lower ventilating slot piece is provided with at least one protuberance which extends in the radial direction of the stator core; the protuberance is positioned in the channel; the protuberance of the upper ventilating slot piece and a stator core fan-shaped piece adjacent to the upper ventilating slot piece define a ventilating path; the protuberance of the lower ventilating slot piece and a stator core fan-shaped piece adjacent to the lower ventilating slot piece define a ventilating path; the protuberances divide the channel into a plurality of ventilation and heat exchange spaces. By improving the ventilating duct structure of the stator core, the cooling effect of a stator is remarkably improved, the flow of cooling gas and loss of ventilation are also greatly reduced, and accordingly, the efficiency of a motor is improved.

The invention discloses a reciprocating hydrogen inner-cooling end ventilating and cooling device of a steam-turbine generator. An inner-core copper shield and an outer copper shield are arranged, the inner-core copper shield is arranged in a cavity of the outer copper shield, reciprocating air channels are formed between the inner-core copper shield and the outer copper shield, a vacuum cavity and multiple radial air channels are arranged in a pressing ring, and a heat reflection layer is arranged on the inner wall of the vacuum cavity. Therefore, highest temperatures of the copper shields and the pressing ring are reduced effectively, the cooling effect of components in a steam-turbine generator end area is improved, the stable operation capacity of the generator is improved, the cost is reduced, and the device is simple in structure and easy to implement.

The invention discloses a methanol-high-pressure oxygen composite two-stroke engine, which is composed of one or more than one cylinder group, each cylinder group includes a main cylinder and a corresponding auxiliary cylinder, the main cylinder is provided with a starting fuel nozzle, The methanol nozzle, the oxygen nozzle and the exhaust valve of the main cylinder do not have an intake valve. There is a connecting channel between the exhaust port of the main cylinder and the auxiliary cylinder. The connecting channel has a one-way valve at the entrance of the auxiliary cylinder. The one-way valve can only The gas in the main cylinder flows into the auxiliary cylinder. The auxiliary cylinder does not have a fuel nozzle, but is equipped with an inlet valve of the auxiliary cylinder and an exhaust valve of the auxiliary cylinder. Control the amount of oxygen injected by the main cylinder, control the degree of fuel combustion, introduce the high-temperature active gas that has not been completely burned in the main cylinder into the auxiliary cylinder to continue burning, realize the cycle of separate cylinders, reduce the emission of harmful gases, and realize the full combustion of fuel.

An air-conditioning control system includes: an air-conditioning device; and a control device configured to: acquire weather information; detect a boarding event; determine whether an amount of moisture brought in due to an external environment of a vehicle, which is an amount of moisture brought into the vehicle by the occupant at the time of the boarding event, is greater than a predetermined level on the basis of the weather information when a boarding event is detected by the boarding event detecting unit; and change the control information to a second state when it is determined that the amount of moisture brought in while the control information indicates a first state is greater than the predetermined level; control the air-conditioning device; and set a ventilation capacity of the air-conditioning device to be higher when the control information indicates the second state than when the control information indicates the first state.

The invention relates to a multi-link crank-and-rod mechanism (10) of an internal combustion engine (1), which has a plurality of connecting-rod journals (6) rotatably supported on a crankshaft (2). ) on the coupling (11) and a plurality of articulated links (15) supported on the connecting rod journal (19) of the eccentric shaft (8) in a rotatable manner, wherein each coupling (11) It is connected in a pivotable manner to a piston connecting rod (4) of a piston (3) of an internal combustion engine (1) and to one of the hinged connecting rods (15). It is stipulated here that, in order to reduce the second-order free inertial force, the multi-link crank linkage (10) is designed or adjusted in such a way that the range of the crankshaft rotation angle in the intake stage is greater than 180 degrees; the crankshaft rotation angle in the compression stage The range is less than 180 degrees; the crank angle range of the expansion stage is greater than 180 degrees; and the crank angle range of the exhaust stage is less than 180 degrees. The invention also relates to a method for operating a multi-link crankshaft (10) of an internal combustion engine (1).

The invention discloses a method for district cooling of internal cooling and external cooling of a rotor magnetic pole. A cooling gas flows into a channel between two magnetic pole coils through a ventilating partitioning device on air inlet ends of the two magnetic pole coils to form an external cooling ventilating air path for cooling the external part of the magnetic pole coils, flows into the interiors of the magnetic pole coils through a gap between magnetic pole iron cores and magnetic pole coils to form an internal cooling ventilating air path for cooling the interiors of the magnetic pole coils, and finally flows into the channels between the two magnetic pole coils from the interiors of the magnetic pole coils, so that the ventilating partitioning device is used for mutually separating the external cooling ventilating path from the internal cooling ventilating path which flow in the channel. According to the method, through simultaneously performing internal cooling and external cooling on the magnetic pole coils, and separating the internal cooling ventilating air path and the external cooling ventilating air path in the channel between the two magnetic pole coils, the internal cooling ventilating air path and the external cooling ventilating air path are in mutual noninterference, the cooling gas ventilating inside smoothly flows in the channel between the two magnetic pole coils, and thus the cooling effect of the whole magnetic pole is improved.