31results about How to "Effective control of temperature rise" patented technology

The invention relates to an overall salient type intermediate-frequency brushless excitation synchronous generator, which comprises a main generator, an exciter, an excitation regulating system. The excitation regulating system consists of a compound excitation device, a rotating rectifier and an AVR automatic voltage regulator, wherein the compound excitation device consists of a compound excitation winding, a compound excitation current transformer and a three-phase rectifier bridge, the stator of the main generator adopts a fractional slot type short-range winding, the slot number per pole and per phase q is a fractional value, the rotor of the main generator is formed by lamination of multi-pole rotor core laminated pieces, the rotor core of the main generator is of an overall salient type rotor core structure and is formed by overall punching and lamination of rotor core laminated pieces, each rotor core laminated piece is formed with a magnetic pole and a magnetic yoke integrated, and an axial air-cooling hole is arranged at the magnetic yoke. The generator realizes the brushless excitation intermediate-frequency generation, outputs the single-phase or three-phase intermediate-frequency voltage, and has the advantages of excellent performance, stable and reliable operation and high output power.

The invention discloses a cylindrical diesel pile hammer with a forced cooling function. The cylindrical diesel pile hammer comprises a lower cylinder, wherein a fuel pump and an air sucking and exhausting port are arranged on a lower cylinder body; the fuel pump is communicated with an oil nozzle; the air sucking and exhausting port runs through the wall of the lower cylinder body; a coolant forced flowing device is arranged on the periphery of the lower cylinder body, and is capable of guiding a coolant to flow through the external surface of the lower cylinder body; the coolant flowing device is communicated with a pressure coolant source; and a plurality of radiating plates are arranged on the external surface of the lower cylinder body and corresponds to the coolant forced flowing device in position. The cylindrical diesel pile hammer with the forced cooling function is simple in structure, convenient to maintain and manufacture, capable of quickly and timely radiating and effectively controlling the temperature rise of the cylinder, and can be widely applied to the cylindrical diesel pile hammers of various specifications and types.

The present invention relates to a totally closed internal liquid cooling and external wind cooling type switch reluctance electric machine carried by electrically-propelled vehicle, comprising a sealing machine casing, a stator, a rotor, an internal liquid cooling and external wind cooling heat dispersion mechanism and an electric machine waterproof structure. The present invention is characterized in that the heat dispersion mechanism is capable of making the stator winding obtains the double heat dispersion effect of the internal liquid cooling and the external wind cooling at the same time, thereby solving the problem that the stator winding has a halfway heat dispersion. In addition, dedicated gland seals are arranged at the end cap opening of the electric machine, the ends of the axes and the wiring mouthpiece, achieving the aim of the electric machine with a good waterproof performance. The invention has the advantages of large torque, good dynamic performance, high efficiency, good energy saving effect, low noise and reliable seal. The technique is capable of effectively controlling the temperature rise of the electric machine when running up, in particular to the temperature rise of the end part of the stator winding. The present invention is capable of effectively waterproofing, guaranteeing the safe operation of the electric machine on the wet conditions or the seeper of the road surfaces, thereby increasing the work efficiency, the safety performance and the degree of protection of the electric machine, extending the service time.

This invention relates to an electromotive car carried closed switch reluctance motor including a shell, a stator, a rotor, internal and external air-cooling radiation units and a water-proof unit characterizing that the radiation unit enables the stator winding to get dual radiation of air cooling outside and inside at the same time, besides, special sealing devices are set at the end of the motor, the shaft end and the connection port to prevent water.

The present invention provides a mover module and a linear motor. The mover module comprises a mover iron core, the mover iron core comprises a first tooth portion, a holding cavity is constructed atthe inner side of the first tooth portion, the mover module further comprises a cooling pipeline, and the cooling pipeline comprises a tooth portion pipe section which is arranged in the holding pipe.The mover module and the linear motor can greatly improve the structure compaction of the mover module, can reduce the assembling and manufacturing difficulty of the mover module, can effectively control the temperature rise of the mover module and even the linear motor through targeted cooling of the mover iron core tooth portion and the coil winding and can facilitate ensuring of the performance reliability and the operation stability of the motor.

The invention discloses a generator which comprises an end cover, a generator part, a motor bracket and an induced air shell, wherein the generator part consists of a stator, a rotor, a rotor shaft and a generator cooling fan; the induced air shell is divided into two cavities by a middle clapboard, the front cavity is connected with the motor bracket and is provided with an air inlet in the side wall, and the rear cavity is provided with a fan which is coaxially connected with the rotor and is provided with an air outlet in the side wall; and one side, which is axially opposite to the middle clapboard, of the rear cavity is provided with an exhaust opening. A ventilation channel is arranged in the manner that for the first ventilation channel, cooling air is sucked into the front cavity of the induced air shell from the air inlet in the side wall of the front cavity of the induced air shell, cools the generator and then is exhausted by the generator cooling fan through the air outlet of the generator; and for the second ventilation channel, air is sucked from the exhaust opening in the cavity from the fan in the rear cavity of the induced air shell and is exhausted through the air outlet in the side wall of the cavity. The generator has the advantages of small noise, temperature rise and invariable output power.

The invention discloses a flexible heat pipe used for cooling the surface of a rotating shaft of a high-speed motorized spindle. The flexible heat pipe (7) comprises a substrate (701), a runner plate(702) and a cover plate (703), the substrate (701), the runner plate (702) and the cover plate (703) are sequentially bonded from top to bottom, wherein the runner plate (702) is provided with a heatpipe runner, and a sealed heat transfer fluid is filled in the heat pipe runner. The flexible heat pipe is adhered on the surface of the rotating shaft by bending in use. The temperature of the rotating shaft is obviously increased because of the loss of an internal motor, the generation of heat by friction of front and rear bearings and wind motor of the rotating shaft at the operation state of the motorized spindle. The provided flexible heat pipe has an excellent heat transfer performance at the high centrifugal force, the local temperature rise of the rotating shaft is effectively controlled, the thermal deformation caused by the uneven temperature distribution is reduced, the influence of thermal deformation of the rotating shaft on the machining precision of the high-speed motorizedspindle is effectively controlled, meanwhile, the original structure of the motorized spindle is less changed, and the flexible heat pipe has the advantages of high reliability, low cost, easiness inpromotion and implementation and the like.

The invention discloses a 5-fluorocytosine fluorination reactor with the stirring function. The outer surface of a barrel (1) is sleeved with a cooling jacket (2); the middle of the upper portion of the barrel (1) is provided with a solid material adding device (12); one side of the upper portion of the barrel (1) is provided with a gaseous phase outlet (10) which is internally provided with an electric discharging valve (8); the other side of the upper portion of the barrel (1) is provided with a temperature measuring sleeve (7); the upper portion of the temperature measuring sleeve (7) is located outside the barrel (1); the lower portion of the temperature measuring sleeve (7) is located in the barrel (1); the upper portion of the side face of the barrel (1) is provided with a fluorine and nitrogen inlet pipe (4) which is communicated with the interior of the barrel (1); a gas distributor (5) is arranged at the bottom of the barrel (1); a cooling coil pipe (3) is arranged on the inner surface of the barrel (1); a stirrer (6) is arranged at the center of the barrel (1); a liquid level meter port (9) is formed in the side face of the lower portion of the barrel (1); a liquid phase discharge port (11) is formed in the bottom of the barrel (1).

The invention provides a method for cooling an air leaking flange of a supporting plate of a hot blast valve. The method comprises the following steps: winding an air leaking position by using a thin copper wire strand at first, and fastening and stressing through bolts of the flange; welding a cooling water tank to the lower part of the hot blast valve, and enabling the upper edge of the cooling water tank to be higher than the air leaking flange; respectively welding a water replenishing tube and a water draining tube to the upper part of the cooling water tank; connecting the water replenishing tube to a water tube through a ball valve and a cloth inserted hose, and meanwhile welding an overflow tube to the upper edge of the cooling water tank; then opening the ball valve on the water replenishing tube to carry out water replenishing; after water flows out from the water draining tube, adjusting the open degree of the ball valve, enabling water replenishing and water draining amount to be balanced, and cooling the flange submerged in cooling water through the flowing cooling water. The problem of rising of temperature caused by air leakage of the supporting plate of the hot blast valve can be controlled effectively, burn-through of the supporting plate is prevented, blast stopping accidents of a blast furnace are avoided, consumption of spare parts is reduced, repair costs are reduced, yield loss is avoided, and smooth production of the blast furnace is guaranteed.

The invention discloses a barrel-hammer-following circulating water cooling system which comprises a lower cylinder and a water-cavity outer wall fixedly connected on the lower cylinder. A cooling water cavity is formed between the lower cylinder and the water-cavity outer wall, a cooling water tank and a circulating pump unit are serially connected between a water outlet and a water inlet of the cooling water cavity through a cooling water pipe, the circulating pump unit is electrically connected with a controller, a water outlet of the cooling water cavity is communicated with a pressure sensor and a temperature sensor which are electrically connected with the controller respectively, and at least one section of the cooling water pipe is a soft water pipe. Through circulation of cooling water outside the water cavity, quick dissipation of heat of a lower cylinder of a barrel hammer is realized, so that temperature rise of the lower cylinder is controlled effectively and large-tonnage continuous running of the barrel hammer is realized.

The present invention relates to a hydrate temperature control heat dissipation low-voltage cable. The whole cable is formed by a conductor, a first nano-graphite coating, a rubber insulation layer, an inner shielding layer, a glass fibre protection layer, a hydrate material layer, a second nano-graphite coating, a belting layer, an outer shielding layer, an inner sheath layer, an armor layer andan outer sheath layer. The cable employs the high heat storage density of the hydrate and the good heat-transfer features of nano particles to fill hydrate materials at a twisting gap of a shielding insulation wire, and the nano-graphite coating is added at the inner walls of the conductor outer layer and the belting layer to effectively control the cable temperature rise, improve the carrying capacity and improve the heat dissipation performance. The defects are solved that a traditional low-voltage cable allow the temperature itself to rise caused by heating itself when large-current load work is performed to decrease the insulation level of the cable, shorten the life, increase the device fault rate and increase the fire risk, and therefore, the hydrate temperature control heat dissipation low-voltage cable is especially suitable for buried cables with large heat values caused by an instant peak current and intermittent load.

The invention discloses a method for preparing gasoline by double absorption and desorption of dry gas. The method is characterized in that the raw material dry gas is subjected to first group absorption and desorption to remove part of olefin, and high-value ethylene and propylene are recovered while the olefin concentration in the dry gas feed is reduced; dry tail gas enters the second group for absorption and desorption, part of ethane, propane and butane is separated out and recycled back to the reactor, the olefin concentration in the fed dry gas is reduced, and meanwhile propane, butane and C5 are recycled. The double-absorption desorption reduces the olefin concentration in the fed dry gas from two aspects of separating the olefin in the raw material and recycling the alkane in the tail gas, effectively controls the temperature rise of the reactor, solves the problem that the reaction temperature is difficult to control in the process of preparing gasoline from the dry gas, and is suitable for dry gas raw materials with different sources and different olefin concentrations.

The invention relates to variable frequency controller cooling technology, in particular to a variable frequency controller cooling device for a shutter vehicle used for a coal mine, which is used for effectively cooling the heat produced by a variable frequency controller. The device is provided with a circulating power system, a water tank, and a circulating water channel, the water tank is connected to the circulating water channel of cooling water via a circulating motor of the circulating power system through a pipeline, and the circulating water channel is placed on the bottom of the variable frequency controller. The device takes away the heat produced by the variable frequency controller through the circulating water channel of the cooling water arranged on the bottom of the variable frequency controller, drives a circulating water hydraulic motor to ensure that the cooling water finishes the circulation by means of the power produced by the running driving of a vehicle body, drives a fan through a fan hydraulic motor to make the fan cool a circulating water heat exchanger, stores the cooling water through a cooling water tank, and utilizes the surface of the cooling water tank to assist in heat dissipation. The device can solve the problems such as effective cooling of the variable frequency controller and so on, effectively control the working temperature rise of the variable frequency controller, and ensure that the variable frequency controller normally works within the specified temperature range.

The invention provides a method for determining the pretightening amount of a lead screw based on thermal error and temperature rise weighting, and belongs to the field of numerical control machine tool assembly. First, under different preload states of the lead screw, the thermal behavior test of the feed shaft under typical working conditions is carried out to obtain the maximum thermal error of the lead screw under various preload states and the temperature rise of key temperature measuring points; then, establish The mathematical model of the screw preload, the maximum thermal error and the temperature rise of key temperature measuring points; finally, the weighted function of the maximum thermal error and the temperature rise of each temperature measuring point is optimized as the objective function, and the optimal prediction of the screw is obtained. Tight amount. This method comprehensively considers the thermal error of the feed shaft and the temperature rise of key points to determine the optimal preload of the screw, which solves the problem that the current experience-based screw preload method is difficult to achieve the optimal effect, and can improve the machining accuracy of the machine tool And precision stability, and ensure the service life of moving parts such as bearings.

The invention belongs to the technical field of mechanical sealing, and discloses a mechanical sealing device. The device comprises an upper moving ring, an upper static ring, a lower moving ring, a lower static ring and a ring seat, the upper moving ring is matched with the upper static ring, and the upper moving ring rotates relative to the upper static ring to form first end face sealing; the lower moving ring is matched with the lower static ring, and the lower moving ring rotates relative to the lower static ring to form second end face sealing; a flow channel is arranged in the ring seat, the flow channel is communicated with the first end face seal and the second end face seal and used for conveying lubricating media, a clamping sleeve is arranged in the ring seat, and a cooling flow channel is arranged in the clamping sleeve and used for circularly conveying cooling liquid. By means of the mechanical sealing device, the sealing effect of the mechanical sealing device is improved, and the mechanical sealing device is especially suitable for sealing of a high-cleanliness sterile fermentation tank environment; meanwhile, the lubricating effect and the cooling effect of the rotating part in the sealing device are further improved; in addition, the sealing function and the lubricating function are unified, and the whole device is more compact in structure.