摘要:
A heat generator has a heating chamber and a pair of heat exchange chambers located adjacent to the heating chamber. The heating chamber includes inner walls and accommodates viscous fluid. A rotor is located in the heating chamber and has shearing surfaces facing the inner walls of the heating chamber. The rotor is rotated for shearing the viscous fluid that occupies the clearance between the inner walls of the heating chamber and the working surfaces thereby generating heat. Each inner wall includes a center region, which is located in the vicinity of the axis of the rotor, and a peripheral region, which surrounds the center region. Heat generated in the heating chamber is transferred to the heat exchange chambers and heats circulating fluid in the heat exchange chambers. Each inner wall includes grooves extending radially from the peripheral region to the center region. Each groove includes a bottom and a pair of side walls. The cross-section of each groove is U-shaped, without sharp corners, to prevent flow disturbances in the groove and to prevent wear of the mold that forms the grooves.
摘要:
Two auxiliary machines are mounted in tandem to an automobile and coupled together by a power transmitting device to transmit power of the engine to both of two auxiliary machines. The power transmitting device includes a rotor, a first hub portion adapted to be operably connected to the rotor and fixed to the drive shaft of the first auxiliary machines and a second hub portion adapted to be operably connected to the rotor and fixed to the drive shaft of the second auxiliary machine First and second hub portions are rotatable simultaneously or separately. An electromagnetic clutch can be inserted in the power transmission device.
摘要:
A cooling and a heating system for a vehicle having a refrigerant compressor of a variable displacement type and a viscous heater of a variable heating capacity, integrated by a common, intermediate housing. A space needed for an installation into an engine compartment of a vehicle is saved, while the production cost is reduced. Furthermore, a requirement for reduction of a fuel consumption efficiency at a low outside air temperature condition and a degradation of a lubricant at a high outside air temperature condition, which are otherwise contradictory, are harmonized.
摘要:
A viscous heater includes a heat generating chamber 10 of a sealed structure. The viscous heater is further provided with a storage chamber SR, which is in communication with the heat generating chamber 10 at its central part, via a recovery hole 3c, a feed groove 3f and a feed hole 3e formed in a rear plate 3 and a rear housing 4. The storage chamber SR can store an amount of the viscous fluid, which exceeds the volume of a heat generating gap between an inner surface of the heat generating chamber and an outer surface of a rotor 16. The speed of degradation of the viscous fluid is slowed, while eliminating the necessity of a strict administration of a charged amount of the viscous fluid.
摘要:
A variable heat generating viscous fluid type heat generator having a housing assembly including movable and fixed plate members arranged to define an axially bounded region in which a heat generating chamber is formed to have an axial width which is changed by the axial movement of the movable plate member with respect to the fixed plate member within the housing assembly by the controlled operation of the moving unit. The change in the axial width of the heat generating chamber causes a change in the gap size of a fluid filled gap between the outer face of the rotor element and the inner wall surface of the heat generating chamber and, accordingly, the heat generating performance of the viscous fluid type heat generator is adjustably varied.
摘要:
A heating apparatus for a vehicle includes a heat exchanger for implementing heat exchange between coolant which has cooled an engine and air directed to a vehicle interior to heat the vehicle interior. A viscous heater has a rotor and a heating chamber containing viscous fluid. The rotor rotates when being subjected to rotational power of the engine. The viscous fluid is subjected to a shear force and is heated when the rotor is subjected to the rotational power. The viscous heater heats the coolant fed to the heat exchanger as the viscous fluid in the heating chamber is heated. A clutch is operative for selectively permitting and inhibiting transmission of the rotational power from the engine to the rotor. A belt transmission device connects the engine and the clutch. A physical quantity detecting device is operative for detecting a physical quantity related to a rotational speed of the rotor. A control device is operative for controlling the clutch to inhibit the transmission of the rotational power from the engine to the rotor when the physical quantity detected by the physical quantity detecting device is equal to or less than a predetermined value.
摘要:
A viscous fluid type heat generator which comprises a housing assembly defining therein a heat generating chamber in which heat is generated, and a heat receiving chamber arranged adjacent to the heat generating chamber for permitting a heat exchanging fluid to circulate therethrough to receive heat transferred from the heat generating chamber. A drive shaft is rotatably supported by the housing assembly and is operationally connected to an external rotation-drive source. A rotor element is mounted onto and driven by the drive shaft for rotation within the heat generating chamber. A viscous fluid is held in a gap defined between the inner wall surfaces of the heat generating chamber and the outer surfaces of the rotor element, for heat generation under shearing stress applied by the rotating rotor element. A temperature sensor is provided to detect a temperature of a part of the viscous fluid flowing in an outer peripheral region of the gap. Heat generation suppressing means is provided for suppressing the heat generation of the viscous fluid under the shearing stress when the temperature of the part of the viscous fluid, detected by the temperature sensor, exceeds a predetermined limit temperature.
摘要:
A viscous fluid type heater is disclosed. The heater has a rotor that is mounted on a drive shaft for integral rotation therewith in a heating chamber. The rotor rotates to shears and heats viscous fluid that is accommodated in a clearance defined between an inner surface of the heating chamber and an outer operation surface of the rotor opposed to the inner surface. The operation surface and the inner surface are formed of different materials. The inner surface and the operation surface has a coating for altering characteristics.
摘要:
A viscous fluid type heater is disclosed. The heater has a front housing and a rear housing secured to each other. The front housing has a space in which a first partitioning plate and a second partitioning plate located immovably fitted. A heating chamber that is defined between the first plate and the second plate accommodates viscous fluid. A rotor is rotatably supported in the heating chamber. The rotor rotates and shears the viscous fluid to generate heat. A heat exchange chamber is defined by the first and the second partitioning plates and disposed adjacent to the heating chamber. The heat exchanging chamber allows circulating fluid to flow therethrough so that the circulating fluid is heated by the heat transmitted to the heat exchanging chamber from the heating chamber. A securing structure secures the partitioning plates to the housing and concaves are formed in the outer peripheral surface of the partitioning plates to decrease a contacting area of the outer peripheral surface and the inner peripheral surface.
摘要:
A viscous fluid type heat generator which includes a housing assembly defining a heat generating chamber and a heat receiving chamber arranged adjacent to the heat generating chamber via a partition wall disposed therebetween. A rotor element is mounted to be rotated by a drive shaft for rotation within the heat generating chamber. A viscous fluid is held in a gap defined between the inner wall surfaces of the heat generating chamber and the outer faces of the rotor element, for heat generation under shearing stress applied by the rotation of the rotor element. A heat exchanging fluid circulates through the heat receiving chamber to receive heat transferred through the partition wall from the heat generating chamber. A plurality of grooves, protuberances or expression are formed on at least one of the inner wall surfaces of the heat generating chamber to increase the total heat transfer surface area in the inner wall surfaces, and thus enhance a heat transfer efficiency through the partition wall. The density of arrangement of the grooves in the outer peripheral area of the inner wall surface is larger than that in the inner peripheral area of the inner wall surface.