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

The invention relates to an overflowing fanning strip for strengthening cooling of a motor stator. The novel overflowing fanning strip is arranged between stator core sections in a whole-circle way to form a stator ventilation channel, and fluid flowing through the stator ventilation channel can cool a stator coil and a stator core. The ventilation channel forms a plurality of overflowing areas with alternate compression and expansion at a tooth part through broken line overflowing channel steel. Local fluid whirl generated in the overflowing areas is utilized to strengthen the cooling effect of the stator coil and the stator core, the fluid can take away more consumed heat, and the temperature of each heating component is reduced. In addition, the broken line overflowing channel steel enables the wind resistance of the ventilation channel to be higher, so that the total wind volume declines, the ventilation consumption is reduced, and the efficiency of a motor is improved. Through improvement of the cooling effect, the cooling demand of the motor can be met greatly, and greater economic benefits are brought to users through the efficiency improvement.

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.

A vehicle air-conditioning apparatus in which supercritical refrigerant passing through a refrigerant heat releasing passage of a heat releasing device exchanges heat with refrigerant cooling air introduced from an air introduction surface of a heat releasing device to be cooled, and the cooled refrigerant exchanges heat with air to be introduced into a passenger compartment by an evaporator. Since at least a part of discharge air discharged from an inside of a passenger compartment is introduced from an air introduction surface of the heat releasing device as a ventilation loss utilizing air, ventilation loss utilizing air can be used as a part of refrigerant cooling air. The ventilation loss utilizing air is introduced to the downstream side area of the refrigerant heat releasing passage in an air introduction surface of the heat releasing device.

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.

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 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.

The invention discloses a control method of a heat dissipation system of a high-capacity generator set. The method comprises the following steps: when a rotating wheel drives a rotor to rotate to generate electricity, a rotating shaft on the rotor driving centrifugal fan blades to rotate, so that cold air at the air inlet end is sucked in, flows out in the radial direction through vent holes in amagnet yoke, is sprayed to a stator to absorb heat to become hot air, and is exhausted outwards through the air outlet end; detecting a temperature difference delta T between the air outlet end and the air inlet end, and comparing the temperature difference -T with a set temperature difference delta T; when -T is less than or equal to 0.95[delta]T, reducing the friction force between the rotatingshaft and the centrifugal fan blades to reduce rotating speed of the centrifugal fan blades, and when -T is larger than or equal to 1.05 [delta T, increasing the friction force between the rotating shaft and the centrifugal fan blades to increase the rotating speed of the centrifugal fan blades, and when -T is larger than or equal to 0.95 [delta]T and smaller than 1.05 [delta]T, keeping the friction force unchanged. Ventilation loss can be remarkably reduced, the heat dissipation and cooling efficiency is improved, uniform heat dissipation of the generator set is ensured, and the complex structure of a heat dissipation system is avoided.

The invention discloses an efficient heat dissipation system for a pole coil of a hydro-generator. The system comprises a stator, a rotor and a cooling system. The rotor comprises a rotating shaft, amagnet yoke, a bracket for connecting the rotating shaft and the magnet yoke, a plurality of iron cores, and a plurality of layers of copper bars arranged on the iron cores. The magnet yoke, the ironcore and the stator are respectively provided with a plurality of radial ventilation holes. The middle part of the outer side of the stator is an air outlet end. The cooling system is connected with the air inlet end and the air outlet end through pipelines. A ventilation turn is arranged between every two adjacent layers of copper bars, axial ventilation holes which extend in the axial directionof the rotor and penetrate through the air inlet ends of the two ends are formed in the ventilation turns, a plurality of radial heat dissipation holes which penetrate through the axial ventilation holes are formed in the outer sides of the ventilation turns, and the areas of the radial heat dissipation holes are gradually increased from the two ends of the rotor to the middle of the rotor. According to the invention, the heat dissipation effect of the rotor magnetic pole can be effectively improved, the ventilation loss is reduced, the heat dissipation and cooling efficiency is improved, andthe complex structure of a heat dissipation system can be avoided.

The invention discloses a testing device and method for the flow of a multistage axial-flow fan of a turbine generator. The testing device comprises a body, wherein the shape of the body is identical with the shape of each blade of the fan to be tested. The front edge and the back edge of the body are provided with at least one first pressure measuring hole and at least one second pressure measuring hole correspondingly. Each pressure measuring hole is connected with a pressure measuring pipe of a pressure measuring instrument through a respective measuring pipeline in the body. The testing method comprises the steps that at least one measuring device is adopted, the measuring device is installed on one side of any one blade of the fan to be tested in parallel, and the fan is switched on for testing; and according to the data measured by the pressure measuring instrument, a relevant calculation formula is adopted to calculate the total flow of the fan to be tested. According to the testing device and method for the flow of the multistage axial-flow fan of the turbine generator, the flow of the fan and the wind direction of an inlet are measured through a plurality of measuring points, in the blade height direction, of the testing device, and therefore an important function is achieved on the further improvement of the pneumatic performance of the fan, the improvement of the ventilation efficiency and temperature rising level of a generator and the decrease of the draft loss of the 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 rotor for a rotary electric machine is provided, the rotor including a pack of plates mounted on a shaft, the pack having a plurality of main plates mounted alternately with another plurality of spacer plates and the spacer plates having a base plate with a plurality of spacer profiles, the spacer plate having a crown region close to the shaft and a peripheral region with slots, wherein the plurality of spacer profiles includes at least one guiding spacer profile that has a first end portion arranged radially in relation to the shaft in the crown region of the spacer plate and a second end portion arranged radially in relation to the shaft in the peripheral region of the spacer plate, and the second end portion is offset angularly in relation to the first end portion.