302results about How to "Control temperature rise" patented technology

A system includes a catheter including an elongated carrier, a balloon about the carrier in sealed relation thereto, the balloon being arranged to receive a fluid therein that inflates the balloon, and first and second electrodes within the balloon arranged to carry a voltage there-across including an initial high electrical voltage at an initial low current. The initial high electrical voltage causes an electrical arc to form across the first and second electrodes within the balloon. The electrical arc causes a gas bubble within the liquid, a high current to flow through the first and second electrodes, a decrease in the initial high electrical voltage, and a mechanical shock wave within the balloon. The system further includes a power source that provides the first and second electrodes with a drive voltage that creates the initial high electrical voltage at the initial current and that terminates the drive voltage in response to the decrease in the initial high electrical voltage.

The present invention discloses an electric vehicle charging pile cooling cable. The electric vehicle charging pile cooling cable comprises a cable core and a cable outer sheath covering the cable core; the cable core comprises power cables, a ground wire and auxiliary power cables; the cable core further comprises a control cable and / or signal cables; the power cable includes a power cable conductor and a power cable insulation layer; cooling cavity support ribs are arranged between the power cable conductor and the power cable insulation layer; the power cable insulation layer, the cooling chamber support ribs and the power cable conductor enclose cooling cavities for conveying a cooling liquid; the cooling cavities surround the outer periphery of the power cable conductor and are disposed along the length of the power cable conductor; a plurality of metal conductor wires are stranded and bunched so as to form the power cable conductor; and the power cable conductor is provided with a wire harness armoring layer. The electric vehicle charging pile cooling cable has the advantages of good heat dissipation effect, high flexibility and light weight, and can effectively reduce current heat and achieve high-power charging.

The invention relates to a graded composition of heavy oil hydrogenation catalysts. 5 to 55 percent of hydrodemetallization catalyst, 5 to 55 percent of hydrodesulfurization catalyst and 5 to 55 percent of hydrodenitrogenation catalyst are filled into a reactor from the top to the bottom respectively; along the flow direction, the activity of the catalysts is gradually increased, the aperture is gradually reduced, the granularity is gradually reduced and the porosity is gradually reduced; the active metal ingredients and the acid aid concentrations of the demetallization catalyst and the desulfurization catalyst are in non-uniform distribution, the active metal ingredient and the acid aid concentration of the demetallization catalyst are in gradient reduction, and the active metal ingredient and the acid aid concentration of the denitrogenation catalyst are in gradient increment; the active metal ingredient and the acid aid concentration of the desulfurization catalyst are in uniform distribution; the demetallization catalyst, the desulfurization catalyst and the denitrogenation catalyst consist of one or more catalysts respectively; and the demetallization, carbon residue removal, desulfurization and denitrogenation activities and stability of the catalyst graded composition system are high, and the service life is long.

The invention relates to an apparatus and a cultivating method for scaled cultivation of microalgae. The apparatus comprises: an open-type track tank; a liquid outlet arranged on the open-type track tank; a liquid pump connecting to the liquid outlet, wherein a liquid inlet on the bottom of a photobioreactor is connected to the liquid outlet through the liquid pump; a liquid outlet tube on the top of the photobioreactor, wherein culture solution is delivered back to the open-type track tank through the tube. The cultivating method comprises the steps that: part of the culture solution in the open-type track tank is pumped into the bottom of the photobioreactor through the liquid pump; the culture solution is delivered from the top of the photobioreactor back to the open-type track tank, such that a circulation of culture solution is realized; the bottom of the photobioreactor is ventilated, and carbon is filled. With the apparatus and the method provided by the present invention, photosynthetic carbon fixation efficiency of open-type track tank microalgae cultivation is substantially improved, microalgae growth rate and cultivating density are substantially improved, cultivating period is reduced, and apparatus cost and operation cost of scaled microalgae cultivation are reduced.

The invention discloses a programmable intelligent electric spindle. The programmable intelligent electric spindle comprises a front bearing pedestal, a rear bearing pedestal, a spindle body, a motor rotor, a motor stator, a cooling water jacket, an actuation bearing, an annular pressing block, a tool handle, a controller, a cooling liquid input pipeline, a cooling liquid outlet pipeline and a shell of a hollow structure. An annular cavity is formed between the motor stator and the shell, and the cooling water jacket is arranged in the cavity; a plurality of first piezoelectric actuators are evenly arranged between the annular pressing block and the front bearing pedestal in a divided manner in the circumferential direction, and a plurality of grooves are arranged on the inner side of the rear bearing pedestal in the circumferential direction; second piezoelectric actuators are embedded in the grooves; an electromagnetic valve is arranged on the cooling liquid input pipeline; and the output end of the controller is connected with the control end of the electromagnetic valve, and the control ends of the first piezoelectric actuators and the control ends of the second piezoelectric actuators are connected. Vibration and shaft end deformation of the spindle body can be reduced, temperature rising of the spindle body is regulated and controlled, the structure is simple, and the requirements of parts for machining quality diversity can be met.

The invention relates to a large capacity non-salient pole plate fine type synchronous generator, which is characterized in that a main generator is provides with a stator which is sleeved with a motor base split unit and a rotor which is connected with a motor base through an end cover bearing, an exciting end of a rotor rotating shaft is provided with a brushless excitation system with a high pole number, the tail end of the system is provided with a grounding detecting device, and a cooling system comprises a cooling device which is positioned on the main generator, four ducted cooling paths which circulates in multiply return circuits and is formed by a stator ventilating circuit, a rotor ventilating circuit, an air gas ventilating circuit and an exciting dynamo ventilating circuit of the main generator. The generator has the advantages of reasonable design of the whole system, compact structure, complete function of each portion, convenient installation and maintenance, reliable operating property, high quality of voltage and electric current which are produced and the like, which saves manufacturing cost.

A C4 two-stage hydrogenation device in catalytic thermal cracking to ethylene, which includes a hydrogenation reactor, a mixer and a feed heater, and its technical points are: the first-stage hydrogenation reactor and the second-stage hydrogenation reactor The inlet ends are connected to feed mixers, the outlet of the first-stage hydrogenation reactor is connected to the reflux tank through the discharge cooler, the outlet of the reflux tank is connected to the inlet of the reflux pump, and the outlet of the reflux pump is connected to the feed heater and the second-stage feed mixer in parallel. The material heater is connected to the first-stage feed mixer, and the C4 material feed pipe is connected in parallel on the pipeline between the feed heater and the first-stage feed mixer, and on the pipeline between the reflux pump and the second-stage feed mixer. The present invention adopts two-stage selective hydrogenation, which avoids serious coking in the first-stage reactor caused by deep hydrogenation of 1,3-butadiene, and reduces the operation cycle of the device and the service life of the catalyst. In addition, due to the stronger adaptability to raw materials, it is not necessary to separate light and heavy carbon four, and the mixed carbon four can be directly hydrogenated, which improves the utilization rate of raw materials.

The present invention is loading method of hydroprocessing catalyst. Unlike conventional grading loading scheme, The hydrogenating and denitrogenating reaction region is loaded with the catalyst in antitone grading mold, in which the activity of the hydrogenating and denitrogenating catalyst in the downstream bed side is slightly lower than that in the upstream bed side, and the pore size of the catalyst in the downstream bed side is slightly greater than that in the upstream bed side. The said loading method can control the temperature raise of hydrogenating and denitrogenating catalyst bed, reduce cold hydrogen amount to lower the hydrogen consumption of the apparatus, reduce the carbon deposit speed in the catalyst bed to reduce bed pressure drop of bed, and prolong the service life of catalyst.

The invention provides a coal tar hydrogenation system and a coal tar hydrogenation method. The method comprises a hydrogenation refining reactor, a separation unit and a hydrogenation cracking reactor, wherein the hydrogenation refining reactor is an up-flow fixed bed reactor, the hydrogenation cracking reactor is a down-flow fixed bed reactor, and the separation unit is a middle liquid separation tank; gas-liquid separation is performed on raw oil and hydrogen after a hydrogenation refining reaction, a part of liquid-phase heavy fractions is separated, one path is used as circulating oil and returned to perform the hydrogenation refining reaction again, and the other path is used as quenching oil after being cooled and added between catalyst bed layers for the hydrogenation refining reaction to play a role of cooling; and the other part of the liquid-phase heavy fractions is used as refined generated oil and mixed with hydrogen to perform a hydrogenation cracking reaction, and the obtained reaction product is combined with gas-phase light fractions after the gas-liquid separation to form the final product. The system and the method provided by the invention are low in equipment cost, simple to operate, capable of prolonging the life of the catalysts of the hydrogenation refining reactor and the hydrogenation cracking reactor, and suitable for raw oil with worse conditions.

The invention relates to a method preparing a fluidized bed of para-xylene by aromatics alkylation, which mainly solves the problems of single raw material, large temperature increase of a reaction bed layer, poor catalyst stability, frequent side reaction of an alkylation reagent and low utilization rate in the prior art. According to the invention, the method comprises the following steps: mixing and vaporizing benzene and toluene feed to obtain an aromatic mixture I, vaporizing a mixture of methanol or methanol and dimethyl ether to obtain an alkylation reagent feed II; merging 10-90% of alkylation reagent feed II, the aromatic mixture I and hydrogen carrying gas to obtain a reaction mixture III; the rest part of the alkylation reagent feed II forms single stream or a plurality of streams and can be introduced into a reactor from one position or a plurality of positions of the inlet downstream of a fluidized bed reactor. The technical problem better solves the problems, and can be used in the industrial production for preparing para-xylene by aromatics alkylation.

The invention discloses an immersion control device used for a photoetching machine; a circular flow field cushion chamber, a sealing structure and a drying cavity are arranged from an injection cavity and a recovery cavity outwards in sequence; the flow field cushion chamber can carry out compensation to an exposure flow field in real time so as to reduce the occurrence probability and intensity of liquid backflow; the sealing structure adopts a combination mode of surface characteristic processing of hydrophilic and hydrophobic and the structure design of a tension groove; the section of the tension groove is a triangle inclined outwards in the direction vertical to a substrate; liquid which is drawn to move by the substrate forms backflow so as to restrain the liquid leakage; the drying cavity is filled with matters with super absorbent and communicated with negative pressure, and discharges possible residue of droplets in real time; simultaneously, the mode of conveying the liquid adopts positive pressure to feed the liquid and free flowing of recovery side, thus avoiding fluctuation of flow field caused by the incoordination of liquid injection and recovery pressure.

The present invention relates to a receiving member which accommodates a display panel which displays an image. The receiving member includes an insulated body portion having a bottom plate and sidewalls to define a receiving space, and at least one ground metal portion provided at a region of the insulated body portion, the at least one ground metal portion formed integrally with the insulated body portion. Accordingly, the body portion of the receiving member is formed of an insulated material, thereby reducing the weight of the receiving member and improving heat radiation. Further, a local metal portion is provided in the receiving member, thereby improving electromagnetic interference (“EMI”) and electrostatic discharge performances of elements such as a control board.

A gradation filling method of a heavy oil hydrogenation treatment catalyst. A reaction system includes two or more hydrogenation reactors connected in series. From the second reactor, the activity and probable pore size of the catalyst are both gradually decreased according to the sequence of contact with a reaction material flow in the same reactor. Between two adjacent reactors, according to the sequence of contact with the reaction material flow, the activity of the catalyst at the bottom of one reactor is lower than that at the top of the next one reactor, and the probable pore size of the catalyst at the bottom of one reactor is not more than that at the top of the next one reactor. Meanwhile, the activity of the catalyst at the bottom of one reactor is lower than that at the bottom of the next one reactor, and the probable pore size of the catalyst at the bottom of one reactor is large than that at the top of the next one reactor.

The invention discloses a centralized cooling system for a wind turbine generator system. The centralized cooling system comprises a generator, a water pump, a tee, a first radiator, a second radiator, an oil-water heat exchanger and a gearbox, wherein the tee is connected with the water pump, the first radiator and the second radiator respectively; the first radiator, the generator and the water pump are communicated in turn; the second radiator, the oil-water heat exchanger and the water pump are communicated in turn; and the oil-water heat exchanger is connected with the gearbox. The centralized cooling system integrates the generator and a gearbox water cooling system to eliminate the redundancy of the system. Meanwhile, two electric temperature control valves are adopted in the system, and the flow rates of refrigerating media of the generator and the gearbox water cooling system can be respectively adjusted by automatically adjusting the opening of the temperature control valves according to water inlet temperature of the generator and the gearbox, so that temperature rise of the generator and the gearbox can be simultaneously controlled.

The invention relates to a technical method for preparing aromatic hydrocarbon through methanol aromatization. The technical method is characterized by comprising the steps: firstly, reacting methanol in a fixed-bed reactor filled with a methanol hydrocarbonylation reaction catalyst and an olefin aromatization catalyst, enabling the reacted product to enter a reactor filled with a non-aromatic cracking agent, reacting, separating the product to obtain dry gas, C<3+> non-aromatic hydrocarbon and aromatic hydrocarbon, wherein the dry gas and the aromatic hydrocarbon are output from the system as products, the C<3+> non-aromatic hydrocarbon is dehydrogenated after entering a dehydrogenation reactor, the dehydrogenated C<3+> non-aromatic hydrocarbon returns a methanol hydrocarbonylation reactor for continuing reaction. Through the technique, the methanol conversion, olefin aromatization, non-aromatic cracking and alkane dehydrogenation technology are combined, so that no only can the yield and selectivity of aromatic hydrocarbon be improved, but also the separation difficulty of aromatic hydrocarbon can be lowered. Through the technique, the total yield of the aromatic hydrocarbon (based on mass of methanol) can achieve 30-34%.

The invention discloses a low energy consumption propylene production technology, which comprises the following steps of (1) after mixing raw material methyl alcohol and diluent gas, carrying out etherification reaction, after mixing the primary product and the stream of the diluent gas with steam water and refined hydrocarbon and heat exchanging, preparing olefin so as to obtain a secondary product; (2) separating the secondary product so as to obtain propylene, ethylene, C1-C3 alkane, C4-C6 components comprising olefin and alkane, C7 and heavy components comprising arene; and (3) taking the vaporized purified water obtained through separation as part of the steam water and circulating to step (1), taking the products of ethylene, C1-C2 alkane, C4-C6 as the refined hydrocarbon, and returning to an OTP (one time programmable) reactor for preparing olefin continuously. According to the preparation method, the problem that high propylene yield needs a large amount of steam water and the problem of selectivity in the MTP (methanol to propylene) technology are solved, and the purposes of water saving and energy saving are finally realized through comprehensive regulation of diluent gas, refined hydrocarbon and catalyst carbon deposit quantity.

The invention relates to an anti-dumping hand-push electrical mower which is provided with a machine casing, a power mechanism, an upper cover, a handrail, a grass collecting hopper, a front travelling wheel unit and a rear travelling wheel unit, wherein the upper cover and the handrail are connected with the upper part of the machine casing; the grass collecting hopper is connected with the rear part of the machine casing; and the front travelling wheel unit and the rear travelling wheel unit are connected with the bottom of the machine casing. The power mechanism is in a forwards arranged type. A motor can perform a certain whole machine weight balancing function after arranged on the front part. Part of the grass collecting hopper is arranged in the front space of the rear wheel, so that the grass collecting hopper is arranged on the front part as much as possible, the volume of the grass collecting hopper is ensured, and simultaneously, the distance between the rearest end of the grass collecting hopper and the furculum of the rear wheel is shortened. An adjusting handle, a triangular front connecting component and a triangular connecting component form the connecting rod mechanism. When the machine casing is adjusted to the highest position, i.e. the machine is in the highest cutting position, the machine moves forwards and moves backwards relative to the furculum of the rear wheel, thereby being beneficial to balancing the whole machine.

A light emitting diode (LED) lighting unit applied to a fluorescent lighting fixture including a light emitting diode (LED) lighting unit mounted in an existing fluorescent lighting fixture; a source part being disposed in the LED lighting unit; polarity being switched by means of the source part installed in the LED lighting unit depending on the direction of the installation direction of the LED lighting unit; the LED lighting unit being capable of coping with changed polarity resulted from any direction of the installation; a first bridge rectifier and a second bridge rectifier installed in the LED lighting unit functioning to rectify the current supplied from a ballast of the fluorescent lighting fixture and to conduct a light emitting diode (LED) assembled unit connected in series and parallel.

The invention relates to a lithium ion battery, and aims at providing a high-power lithium ion battery system with a laminated battery structure. The battery system comprises at least two single battery structures, adjacent single battery structures are separated by baffle plates, the laminated battery structure is formed by repeated arrangement of the single battery structures; electrolyte anodeand cathode outlet and inlet channels are respectively arranged on the baffle plates on two ends, two sides of the baffle plates arranged at the middle are both provided with an electrolyte flow path, and the flow paths arranged at the two sides are not communicated; and a piezoelectric pump and a radiating fin are respectively arranged between the electrolyte cathode outlet channel and electrolyte anode inlet channel and between the electrolyte anode outlet channel and the electrolyte cathode inlet channel, or the positions of the piezoelectric pump and the radiating fin are exchanged. By virtue of the battery system, the temperature rise of the lithium ion battery can be effectively suppressed during heavy current charging and discharging, the vaporization of an electrolyte is avoided, the explosion of the lithium ion battery duo to the rise of an internal pressure is effectively prevented, and the use safety of the lithium ion battery is improved.

This invention discloses a digital-controlled wire stripping machine characterized by that each step motor is electrically connected with the said step motor corresponding constant current chopper driver separately. after being fitted with constant chopping drive and static and dynamic current adjustment, the step motor has more powerful driving force, quicker rotating speed and more stable operation, and a gripping device is set up at the terminal for orderly and regular operation guided by a single-chip computer to increase the stripping quality.

The invention discloses a coal mine underground locating device and the locating method, which aims to overcome the technical problems of the low-sensitivity and low-precision locating by the locating device and locating method in prior art. The invention provides a locating device and the locating method with high sensitivity and high locating precision, which is safer and more reliable; the locating device in the invention is provided with a shell, on which equipped with a circuit board. The circuit board is mounted with a power source and the switch circuit. The power source and the switch circuit are connected with the interface I / O of the main chip which is connected with a signal amplifier circuit and a warning circuit; the signal amplifier circuit is connected with the technical scheme of antenna; separately calculates the distance between the signal intensity and the two communication base stations according to the signal intensity by testing the signal intensity from at least two communication base stations, and then calculates the locating method which accords with the coordinate point to the distance of the two base stations. The locating device and the locating method provided in the invention has high locating precision and high sensitivity, which is applicable to the safe production of the coal mine underground.

In this laminated ceramic capacitor, a heat radiation conductor is provided on a top face of a rectangular parallelepiped laminated chip where a plurality of first conductor layers and a plurality of second conductor layers are arranged alternatively through each ceramic layer with facing each other. In addition, the heat radiation conductor is connected to the upper edge of each second conductor layer. Therefore, when heat is generated in each first conductor layer and each second conductor layer which play the role of internal electrodes, the heat of each second conductor layer is directly transferred from each second conductor layer to the heat radiation conductor, and is radiated outside from the heat radiation conductor.

The invention discloses a double-stator single-rotor rare earth permanent magnet motor, which relates to the technical field of motors, in particular to a low-voltage high-power rare earth permanent magnet motor. The motor provided by the invention has two stators and a rotor. The rotor is positioned between the two stators. Armature windings are embedded into wire embedding slots of special rotor cores. A plurality of rare earth magnetic steels are embedded into magnetic conducting rings of the rotor, and provide a multipole magnetic field for air gaps on a left side and a right side. A starting winding and a damping winding are arranged in the rotor. Each stator can drive the rotor to rotate. The two stators can be loaded both simultaneously and respectively, also can be unloaded respectively, and can be controlled in both a direct current way and a frequency modulation mode. The two stators are fixed at the two ends of a housing by a front end cover and a rear end cover. A shaft runs through the rotor and connected with the rotor by a key. The rotor rotates to drive the motor shaft to rotate to output mechanical power. The double-stator single-rotor rare earth permanent magnet motor has the advantages that: sectional areas of a live conducting wire and the winding embedding slots of the cores are ensured; the temperature rise of the motor is controlled; the output power and efficiency are improved; and the designing problems of the low-voltage high-power motor are solved.

The invention discloses a permanent magnet synchronous motor consisting of a stator component and a rotor component. The stator component consists of a casing, a stator iron core and a armature winding, wherein a rotor shaft is a hollow shaft, and an internal ventilation hole with two communicated ends are arranged inside the hollow shaft; the rotor shaft is provided with an external ventilation hole communicated with the internal air through hole in the hollow shaft along a radial direction of the rotor shaft; a magnetic shield is provided with a ventilation hole of the magnetic shield along the radial direction; a magnetic pole is provided with a ventilation hole of the magnetic pole along the radial direction; the ventilation hole of the magnetic shield and the ventilation hole of the magnetic pole are communicated with the internal ventilation hole, and the three ventilation holes form a radiant-type radiating structure with the axial direction crossed with the radial direction. Compared with the prior art, the invention excellently controls the temperature rise of the motor in operation, reduces the demagnetization danger of an Nd-Fe-B permanent magnet, and reduces vortex heating and prolongs the service life of the normal operation of the motor at the same time.

The invention discloses a waterproof charging type amphibious high-pressure cleaning machine. The machine comprises a shell; a motor pump unit and a rechargeable battery, wherein the motor pump unit comprises a motor and a mini-pump, wherein the motor comprises a motor shaft, a rotor and a stator iron core arranged in a motor shell, the rotor is arranged on the motor shaft, and the stator iron core is positioned outside the rotor; the mini-pump is provided with a pump water inlet and a high-pressure water outlet which are formed in a pump shell; the motor shell is provided with a sealing cavity I and an inner shell, the rotor and the stator iron core are arranged in the sealing cavity I, and the stator iron core clings to the inner shell to form a heat conduction channel; the motor shell is provided with at least one cooling channel I, a water inlet I and a water outlet I; the water inlet I is connected with an external water source, and the water outlet I communicates with the pump water inlet; and the sealing waterproof grade of the shell is not lower than IPX7. The waterproof charging type amphibious high-pressure cleaning machine has the beneficial effects that the waterproof grade can reach above IPX7, the machine is safer and more reliable, the working pressure of the whole machine reaches 2.5MPa, and higher cleaning capacity is achieved.

The invention discloses a method for preparing activated charcoal by utilizing a coal-made activated charcoal furnace. The method comprises the following steps: briquetting a mixture of brown coal andweakly caking coal, crushing and drying; then supplying heat through electric heating and natural gas combustion to carry out carbonization under a nitrogen gas atmosphere; after carbonization reaction, introducing natural gas and oxygen gas according to the ratio from a natural gas inlet and an oxygen gas inlet; after the oxygen gas passes through an ion generator, mixing the oxygen gas and natural gas in a mixer; after conveying the mixed gas into a combustion chamber and combusting, generating water steam and carbon dioxide; after mixing the generated water steam and carbon dioxide with the introduced nitrogen gas, enabling mixed gas to enter a gas distribution chamber through a gas heat supply chamber; then enabling the gas to enter a reaction unit to be subjected to activation reaction with raw materials; finally, cooling a reaction product under the nitrogen gas atmosphere to obtain the activated charcoal. According to the method disclosed by the invention, carbonization and activation of coal-made activated charcoal is realized; pyrolyzed coal gas, the water steam and the carbon dioxide, which are generated in a carbonization process, are circularly utilized and the qualityof the produced activated charcoal is relatively high.