40results about How to "Axial temperature difference is small" patented technology

The invention discloses a motor multipath series-parallel water cooling system. The motor multipath series-parallel water cooling system comprises a water pipe at the tail end of the stator core yoke portion of the linear portion of an electric generator and a motor end winding external cooling waterway, and a water loop is composed of the water pipe at the tail end of the stator core yoke portion of the linear portion of the electric generator and the motor end winding external cooling waterway; the motor end winding external cooling waterway is composed of a cooling water pipe cooling system loop of a lower winding layer and a cooling water pipe cooling system loop of an upper winding layer; the cooling water pipe cooling system loop of the lower winding layer is composed of at least one set of circumferential water pipes which are communicated in the direction from the linear portion to the nose end, and the cooling water pipe cooling system loop of the upper winding layer is composed of at least one set of circumferential water pipes which are communicated in the direction from the linear portion to the nose end; the inner-diameter pipe wall of the cooling water pipe cooling system loop of the end lower winding layer is laid on the outer-layer surface of the lower winding layer; the outer-diameter pipe wall of the cooling water pipe cooling system loop of the end upper winding layer is laid on the inner-layer surface of the upper winding layer.

The invention relates to the technical field of heat exchangers, and discloses a finned tube heat exchanger and application thereof and an afterheat boiler. The finned tube heat exchanger belongs to a radial heat transfer heat tube, and has the advantages of high heat transfer efficiency, short axial length, small size and light unit heat exchange weight; a sucking core has no need to be arranged in the tube; and inner tube fins of a first layer of inner tubes can be used for guiding condensed water to flow onto the inner walls of outer tubes to absorb heat for evaporation, so that the whole inner walls of the outer tubes become the heat absorption evaporation surface area of phase change liquid. The finned tube heat exchanger is applied to industrial afterheat, can reduce industrial pollution, and also can fully use the industrial afterheat; and the industrial afterheat is secondarily converted to energy for recycling by human. The afterheat boiler adopts the finned tube heat exchanger consisting of heat tubes to recover heat; the finned tube heat exchanger is small in size, and can be flexibly arranged on a flue; and the heat tubes belong to radial heat transfer, so that the heat exchange area with waste smoke in the flue is largely increased, and the heat exchange efficiency is improved.

This invention provides a gas heating and wetting system used in test platforms of small PEM fuel batteries, which applies a method of preheating gas-phase and liquid-phase to a preset temperature for increasing the control accuracy of a small wetting system so as to reduce load of heating of a wetter, in which, deionized water entering into an wetting system and the reactant gas can be pre-designed to a bit higher than saturated temperature by a control system in terms of the flow of the wetted reactant gas, thus, the gas reactant entering into the wetter imbibes by transmitting medium under the temperature closing to saturation so as to reduce axial temperature difference of the wetter.

The invention belongs to the technical field of energy utilization, and provides a method for making an oil product taking methane as a raw material. The method comprises the following steps that (1)the raw material methane serves as virgin gas of reforming reaction after being decontaminated, purified and compressed through a purification compression system; (2) the virgin gas enters into a reforming reaction system and is translated into synthesis gas; (3) the synthesis gas enters a Fischer-Tropsch synthesis system for reaction to generate a Fischer-Tropsch synthesis product; (4) the obtained Fischer-Tropsch synthesis product is subjected to gas-liquid separation in a separation system to obtain a hydrocarbon product, a gas product and synthetic water respectively; (5) the hydrocarbon product enters a hydrocarbon product hydroisomerization system for hydrogenation and quality improvement to obtain the oil product not containing sulfur, nitrogen and arene; and the balance of pressureand material flow between a reforming reactor and a Fischer-Tropsch synthesis reactor is controlled through a pressure flow coupling control system. The method fully develops and utilizes potential value of the methane to achieve that the methane is translated into the oil product.

The invention discloses an efficient and uniform heating device for a motor hot jacket. The device comprises an induction coil capable of matching an inner cavity of the motor hot jacket and an alternating current power supply module connected with the induction coil, and the induction coil is a multi-turn hollow spiral copper coil; the induction coil is wound in a grouping crosstalk mode to form n coil groups which are connected in series, the hollow spiral copper coils in each coil group are uniformly wound, the winding radiuses of the hollow spiral copper coils in the n coil groups are the same, and the longitudinal distance between every two adjacent coil groups is larger than the outer diameter of each hollow spiral copper coil; n is an integer, and n is greater than or equal to 2. According to the invention, the heating efficiency and the heating uniformity can be improved.

The invention discloses a device for improving uniformity of axial temperature distribution of a stator, and belongs to the technical field of electric generators. The device comprises a rotor core and a rotor engine base; the device is characterized by further comprising a stator core, a stator pressing plate I, a stator pressing plate II, a core penetrating screw and an axial annular plate; thestator core comprises a plurality of core sections, and a stator air duct is arranged between any two adjacent core sections; the plurality of core sections are connected with each other through the core penetrating screw; the axial annular plate is fixed between the stator pressing plate I and the stator pressing plate II; circumferential annular plates are fixed on the core sections; a stator-rotor gap is arranged between the stator core and the rotor core; and the stator pressing plate I, the stator pressing plate II, the axial annular plate and the stator core enclose the stator core backspace. According to the device for improving the uniformity of the axial temperature distribution of the stator provided by the invention, the static pressure difference can be kept constant, and theaxial wind speed of the stator air duct is relatively uniform, so that favorable conditions are provided for the axial uniform distribution of a stator coil and the iron core temperature, the axial temperature difference between the stator coil and the core is reduced, the structure is simple, and the adjustment is easy.

The invention discloses a composite heat dissipation structure of a vehicle generator. The composite heat dissipation structure comprises a machine shell, and a generator rotor and a generator statorarranged in the machine shell, and further comprises a fan, a cooling water channel, an electric control water pump, a temperature sensor and a controller; the fan is arranged at the end of the generator rotor and synchronously rotates along with the generator rotor; the cooling water channel is arranged in the outer surface of the machine shell, and the electric control water pump is arranged onthe machine shell and is connected with the cooling water channel; the temperature sensor is installed on the surface of the generator stator; the controller is installed on the machine shell and electrically connected with the electric control water pump and the temperature sensor; the temperature sensor is used for collecting temperature signals in the machine shell in real time and sending thetemperature signals to the controller; and the controller receives the temperature signals sent by the temperature sensor to control the electric control water pump to be opened and closed. The composite heat dissipation structure has the advantages of being high in efficiency, controllable, remarkable in cooling effect and strong in universality.