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

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.

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.

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.