41results about How to "Lower operating temperature" patented technology

The invention discloses a regeneration method and application of an iron-based catalyst. The regeneration method of the iron-based catalyst comprises the following steps: S1, contacting an inactivated iron-based catalyst with a regeneration solution for pretreatment to obtain an intermediate product; the regeneration solution comprises N-methyl pyrrolidone, and the concentration of the N-methyl pyrrolidone is greater than or equal to 3%; s2, roasting the intermediate product to obtain a regenerated iron-based catalyst; the roasting temperature ranges from 250 DEG C to 300 DEG C. The regeneration method of the iron-based catalyst provided by the invention is high in regeneration efficiency, and the prepared regenerated catalyst is good in catalytic performance.

The invention provides a continuous forming and gradient flooding method and device for a spherical energetic material. The method comprises the following steps: forming liquid medicine into uniform micro-drops through a micro-channel device, and sequentially feeding the uniform micro-drops into three stirring kettles which are connected in series: curing and forming in a first stirring kettle at 5-25 DEG C, overflowing into a second stirring kettle, carrying out low-temperature flooding at 40-60 DEG C so as to remove more than 80% of solvent, overflowing into a third stirring kettle, and completing high-temperature deep flooding at 70-90 DEG C, and finally cooling to room temperature through a cooling device. And the three stirring kettles realize continuous transfer through an overflow structure, and manual intervention is not needed. The device comprises a metering pump, a micro-channel device, three stirring kettles connected in series and a cooling device. Through the gradient strategy of low-temperature pre-desolvation and high-temperature deep desolvation, the contradiction between particle softening deformation and solvent residue in the traditional process is solved, the particle size distribution deviation of the spherical energetic material is smaller than or equal to 5%, the deformation rate is smaller than or equal to 2%, the solvent residue is smaller than or equal to 50 ppm, the production continuity is improved by 40% or above, and the method is particularly suitable for continuous production of temperature-sensitive energetic drugs.

The application belongs to the technical field of electric tricycle motors, in particular to an electric tricycle motor protection assembly, which comprises a motor body, the motor body is a permanent magnet synchronous motor, a protection plate is arranged outside the motor body, a connecting block is fixed to one side of the motor body close to the protection plate, an extrusion block is fixed to the side of the connecting block away from the motor body, a buffer spring is fixed between the extrusion block and the protection plate, an extrusion rod is arranged inside the buffer spring, and the extrusion rod is fixedly connected with the protection plate. The protection plate is first contacted with the pit or the protrusion, so that the motor body is protected, and in this process, the protection plate compresses the buffer spring to deform, thereby buffering the impact force. Thus, the motor of the electric tricycle is effectively protected from damage caused by bumps during normal driving, and the service life of the electric tricycle is improved.

This application relates to a motor heat dissipation mechanism for a vacuum cleaner, belonging to the field of mechanical heat dissipation. It includes a stator, a rotor, an air inlet housing, a rotating shaft, an end cover, a moving impeller, and a first stationary impeller. The stator is fixed inside the first stationary impeller, and the moving impeller is located inside the air inlet housing. There is a gap between the outer circumferential wall of the moving impeller and the inner wall of the air inlet housing. The first stationary impeller is fixedly connected to the end cover, and the rotating shaft is rotatably connected to the first stationary impeller. A cooling air duct is provided between the inner wall of the first stationary impeller and the outer wall of the stator. A baffle shell is fixedly provided on the outer circumferential wall of the first stationary impeller and is fixedly connected to the air inlet housing. A second stationary impeller is coaxially fixed at the end of the first stationary impeller near the moving impeller, and the outer circumferential wall of the second stationary impeller is in contact with the inner wall of the air inlet housing. A cover plate for mounting a circuit board is fixedly provided at the end of the end cover away from the first stationary impeller, and the end cover has several ventilation holes. This application has the effect of reducing dust accumulation in the vacuum cleaner motor and achieving simultaneous and efficient heat dissipation.

The utility model belongs to the technical field of cement processing, and particularly relates to an equipment heat insulation structure, which comprises a heat resistance component mounted between a cement mill cylinder and a slide shoe bearing, the heat resistance component comprises a support framework fixedly connected to the outer wall of the cement mill cylinder and an annular frame in sliding connection with a support tile, the supporting framework is fixedly connected with the annular frame, the heat resistance assembly effectively blocks transmission of heat of materials in the cement mill barrel by separating the cement mill barrel from the supporting tile from direct contact, and therefore the operation temperature of the sliding shoe is reduced, and the heat resistance assembly is arranged between the cement mill barrel and the sliding shoe bearing, so that the heat resistance of the cement mill barrel is improved. The cement mill cylinder and the supporting tile are separated from direct contact, so that heat of materials in the cement mill cylinder transferred to the sliding shoe can be effectively reduced, the running temperature of the sliding shoe is reduced, the cement mill is prevented from being shut down due to too high temperature, the production problem is effectively solved, and smooth production is guaranteed.

According to the technical scheme, the embedded network fault diagnosis device is characterized in that the embedded network fault diagnosis device comprises a heat dissipation mechanism; the heat dissipation mechanism comprises a mounting base, two sets of overhead limiting mechanisms are assembled on the upper end face of the mounting base, and a network fault diagnosis equipment body is jointly assembled between the two sets of overhead limiting mechanisms. According to the embedded network fault diagnosis device, the heat dissipation fans installed in the two installation grooves formed in the upper end face of the installation base are matched with the multiple air inlet grooves formed in a penetrating mode to form a complete forced convection heat dissipation system, and the air inlet grooves are distributed around the heat dissipation fans in a surrounding mode, so that the sufficient and uniform air inlet amount is ensured; after external cold air is sucked in from multiple directions of the bottom of the mounting base, the external cold air is blown upwards to the bottom of the network fault diagnosis equipment body through the cooling fan, the operation temperature of the equipment is effectively reduced, a positive and negative tooth screw rod mechanism is matched with a transmission system of a transmission belt, and the accurate synchronous adjustment function of the clamping width is achieved. And network fault diagnosis equipment bodies with different sizes can be adapted.

The utility model relates to the technical field of heat energy recovery of air energy heat pumps, in particular to a waste heat recovery device of a high-temperature air energy heat pump, which comprises a heat pump outer casing, the heat pump outer casing is fixedly mounted outdoors, a through hole is formed in the outer surface of the heat pump outer casing in a penetrating manner, and a heat exchange coil is arranged on the outer surface of a compressor in an inserting manner. According to the waste heat recovery device for the high-temperature air energy heat pump, heat generated during operation of the compressor can be absorbed and exchanged through the heat exchange coil, so that the heat released by the compressor can be transferred into the heating fins, and the water heating exchanger is heated again through the heating fins, so that the efficiency of heating the water heating exchanger by the condenser is improved; and the running temperature of the compressor can be reduced, stable running of the compressor is guaranteed, the stability of the air energy heat pump during running is guaranteed, the service life of the compressor can be prolonged, and waste heat generated during running of the compressor is recycled.

This invention provides an axial flux motor, comprising: a first rotor; a second rotor; a stator located between the first rotor and the second rotor; and a first end cover disposed outside the first rotor. The first rotor includes a first rotor magnet and a first support plate in direct contact with the first rotor magnet. The surface of the first support plate is rough. The first end cover includes: a first oil passage including a first plurality of oil injection holes; and a first oil pipe connected to the first oil passage and an external oil pump. Cooling oil enters the first oil passage from the external oil pump via the first oil pipe and is sprayed from the first plurality of oil injection holes in the first oil passage onto the surface of the first support plate. Furthermore, this invention provides a method for cooling the axial flux motor. This invention effectively solves the heat dissipation problem of the axial flux motor, thereby significantly improving the heat dissipation efficiency of the axial flux motor, reducing the operating temperature of the axial flux motor, and extending the service life of the axial flux motor.

The utility model discloses a transformer oil tank structure with multiple heat exchange modes, and relates to the technical field of transformer cooling. The device structurally comprises a shell, a box cover, a plurality of U-shaped pipes, a buffer tank and a circulating pump, a heat exchange box body extending downwards is arranged in the center of the lower end of the shell; supporting channel steel is fixed to the lower end of the shell and located on the two sides of the heat exchange box respectively; the circulating pump is mounted on one supporting channel steel; an S-shaped coil pipe is fixed between the left wall and the right wall of the heat exchange box body in a penetrating mode. Geothermal cooling is carried out through the U-shaped pipes buried underground, heat exchange is carried out through the low temperature and stability of underground soil, the operation temperature of the transformer is effectively reduced, and the cooling efficiency is improved. The geothermal cooling mode does not need additional refrigeration equipment, only a circulating pump is needed to drive cooling liquid to circulate, and operation energy consumption is low. And the underground soil temperature is relatively stable and is slightly influenced by the external environment, so that the geothermal cooling effect is stable and reliable, and the transformer can normally operate under various environmental conditions.

The utility model discloses a digital monitoring type UPS (Uninterrupted Power Supply), which comprises a main control module, a display module, a battery monitoring unit and an environment sensing assembly, the main control module is a core control unit, the display module is used for displaying operation parameters in real time, the battery monitoring unit collects data through a current and temperature sensor, and the environment sensing assembly monitors the external environment through a humidity and vibration detection element. The communication interface supports remote management, and the heat dissipation fins optimize the heat dissipation performance. According to the invention, comprehensive monitoring of the internal state and the external environment of the UPS can be realized, the reliability and the operation efficiency of equipment are improved, the maintenance cost is reduced, and the system is suitable for various power supply scenes.

A circulating water pump motor for dish-washing machine is convenient for heat dissipation, which comprises a stator core, front and rear machine covers clamped and fixed at two ends of the stator core, bearing holes are formed at central positions of the front and rear machine covers, front butt joints are connected with front end covers through a plurality of front connecting ribs, front heat dissipation holes are formed between adjacent two front connecting ribs, the rear machine cover comprises a rear butt joint and a rear end cover, a rear clamping seat is arranged at an end surface of the rear butt joint, a rear end surface of the stator core is clamped and installed in the rear clamping seat, the rear butt joint is connected with the rear end cover through a plurality of rear connecting ribs, rear heat dissipation holes are formed between adjacent two rear connecting ribs. The front and rear heat dissipation holes constitute direct and effective heat dissipation channels, air convection between the inside and outside of the motor is promoted, and the operating temperature of the motor as a whole, especially the stator core and other heating components, is significantly reduced.

The utility model belongs to the field of material conveying, and relates to a steel sleeve steel straight pipe section for pneumatic conveying of high-temperature materials. The straight pipe section is composed of an outer pipe, an inner pipe, a sealing filler base, a sealing filler gland, a gland bolt, a small-head sealing filler, an inner and outer pipe connecting plate, an inner and outer pipe connecting bolt, an inner and outer pipe connecting pad, a large-head sealing filler, a sealing filler pre-tightening spring, a heat insulation layer and a flange sealing assembly. The inner pipe is a reducer pipe, an inlet large end is in bolted connection with the outer pipe, and an outlet small end can be inserted into a connected pipe section large end. And a heat insulation layer is filled between the inner and outer pipes to reduce heat loss. Double sealing of the sealing filler is achieved through the pre-tightening spring and the gland bolt, and gas is prevented from entering. The design effectively solves the problems of thermal expansion and sealing of the pipeline in pneumatic conveying of high-temperature materials, and the conveying efficiency and safety are improved.

The application discloses an air electrode and application thereof, and belongs to the field of solid oxide batteries. The air electrode is formed by sintering an air electrode precursor in a CO2 atmosphere, and is a composite electrode of microparticles and nanoparticles. The size of the nanoparticles is 10-100 nm, the size of the microparticles is 0.5-2 microns, and the nanoparticles are uniformly dispersed on the surface of the microparticles. The composition of the air electrode precursor is Ba 1‑x N x Co 1‑m‑n Fe m M n O 3‑d , 0 < x < 0.5, 0 < n < 0.2, 0 < m < 0.3, 0 < d < 0.5, N is one or more than two of Sr, Mg, Ca, K and Na, and M is one or more than two of Sc, Zr, Nb, Ce, Y and Yb. The air electrode has excellent oxygen reduction and oxygen evolution reaction activity, and shows outstanding electrochemical performance in fuel cell power generation, hydrogen production by water vapor electrolysis and synthetic gas preparation by electrolysis.

The utility model relates to the field of mechanical engineering, in particular to a bearing seat thin oil sealing waterproof device which comprises a roller body and a bearing seat. The waterproof structure comprises a water retaining ring and a water throwing cover; and the water retaining ring is arranged between the roller body and the bearing seat and is fixedly connected with the end face of the roller body through a bolt. According to the multi-stage waterproof structure design, the water retaining ring with the inclined boss and the split type water throwing cover are arranged between the roller body and the bearing seat, water flow is guided to be discharged through the water outlet by centrifugal force, and external water is effectively prevented from invading the bearing seat in cooperation with an annular gap formed by dynamic rotation; the problem that a traditional sealing structure is prone to failure in a high-pressure flushing environment is solved, through the synergistic effect of dynamic oil control and the sealing assembly, the W-shaped oil grooves which are spirally distributed are formed in the shaft body, the throttling effect of the oil retainer ring and the throttling effect of the oil retainer ring are combined, a small amount of leaked oil liquid is recycled to a lubricating system through centrifugal force and gravity, and oil liquid waste and environmental pollution are reduced.

The application discloses a product separation method of phenylenediamine prepared by a phenol hydroxylation method, which comprises the following steps: (1) sending the phenol hydroxylation reaction liquid into a vacuum dehydration tower for dehydration; (2) sending the mixture in the tower kettle of the vacuum dehydration tower into a thin film scraped blade evaporator for coke removal; (3) sending the gas phase mixture collected from the top of the thin film scraped blade evaporator into a phenol removal tower, and separating phenol; (4) sending the mixture in the tower kettle of the phenol removal tower into an o-phenylenediamine rectification tower for product refining, and separating o-phenylenediamine; (5) washing, filtering and removing coke from the p-phenylenediamine crude product solution in the tower kettle of the o-phenylenediamine rectification tower; and (6) decolorizing and crystallizing the p-phenylenediamine solution after the coke removal, and obtaining p-phenylenediamine. By means of the above-mentioned synergistic effect, the phenol hydroxylation reaction liquid is efficiently and high-quality separated.

The utility model provides a water pump stator structure, which relates to the field of water pump motors, and comprises an iron core, a winding and an insulating frame which are coaxially arranged, the peripheral surface of the iron core is provided with a plurality of axially extending spiral heat dissipation grooves, and a stepped sealing groove is formed between the iron core and a shell. According to the design, a unique collaborative heat dissipation mechanism is formed through the iron core spiral heat dissipation grooves and the stepped sealing grooves. The stepped sealing grooves change the flowing path of hot air in the motor, so that the hot air flows to the spiral heat dissipation grooves more orderly, the air convection intensity in the spiral heat dissipation grooves is enhanced, the overall heat dissipation effect is further improved, the operation temperature of the stator is effectively reduced, and the stability of the motor in high-load operation is guaranteed.

The utility model relates to generator set protection equipment technical field, concretely relates to a construction generator set shell with fire prevention function, including base, top cover and side wall coaming, the side wall coaming is fixed on the base, and the top cover is buckled and is connected with the top of side wall coaming, the side wall coaming adopts double -deck composite structure, including the metal protection board and fire -retardant lining that set gradually from outside to inside, the metal protection board surface is coated with high -temperature -resistant anticorrosive coating, and the back of fire -retardant lining is connected through buckle and metal protection board up and down sliding insertion, the metal protection board inboard is equipped with the flow guide rib that abuts with the back of fire -retardant lining, be equipped with the guide slot that is matched with the buckle shape on the flow guide rib, and form the ventilation interlayer between adjacent flow guide rib, the top cover is composed of the extension plate of triangle and the cover plate of top inclination, be equipped with the radiating window on the extension plate, the radiating window inside integrates multilayer fire -retardant metal net.

The utility model relates to dust removal device technical field, concretely relates to a water cooling integrated cyclone dust collector, and the device structure includes the casing, sets up the air inlet pipe, the air outlet pipe in the casing outside and is penetrated to the casing, the impeller rod is longitudinally and rotationally arranged in the casing, the water pump is arranged in the casing bottom, and the cooling channel is arranged on the casing side wall around, through the impeller rod and water pump axle linkage design, utilize the air intake airflow drive impeller rotation to realize self -supply energy water cooling circulation, through the cooling channel in the casing interlayer cavity and the synergic effect of rotary filter plate, complete gas cooling in the dust removal process simultaneously, integrate dust removal and cooling function in one, have the comprehensive advantage that energy -conserving and cost -reducing, dust removal cooling synchronization, compact structure and maintenance cost are low.

The application relates to a high-concentration wastewater treatment device and method containing free ammonia and ammonium salt, and relates to the technical field of wastewater treatment. The method comprises the following steps: feeding wastewater into an MVR evaporation crystallization system for preheating, feeding the preheated wastewater into a forced circulation heater for heating to obtain a feed liquid with high solid content, and feeding the feed liquid with qualified solid content into a crystallizer for crystallization; feeding ammonia-containing condensate water into the top of a rectifying tower, performing vapor-liquid exchange heat transfer on the ammonia-containing condensate water in the rectifying tower; rectifying the ammonia-containing condensate water, and discharging the feed liquid in the rectifying tower through a kettle liquid pump when the ammonia content of the ammonia-containing condensate water is less than a certain value. When the feed liquid in the rectifying tower is discharged, only a trace amount of ammonia is contained, and the ammonia-containing condensate water is less harmful when recycled.

This utility model discloses an anti-deviation and friction-reducing belt with a wavy groove, belonging to the technical field of material conveying equipment. The belt includes a belt body (1), characterized in that: at least one groove (4) extending along the belt length direction is provided on the non-load-bearing surface (3) of the belt body, and the cross-sectional profile of the groove (4) is a periodically undulating wavy shape, which is composed of alternating and continuously arranged protrusions (41) and depressions (42).

The application relates to the technical field of LED lamps, in particular to an LED lamp which comprises a shell and an LED lamp plate arranged in the inner cavity of the shell, and a gap for air circulation is formed between the panel edge of the LED lamp plate and the inner wall of the shell. The application creates a natural air circulation channel in the lamp shell by reserving the gap between the LED lamp plate edge and the shell inner wall, allows the internally accumulated hot air to naturally convect outward through the gap, and meanwhile, the cooler air outside can also supplement into the gap, forming a passive heat dissipation air duct. This effectively alleviates the problem of internal heat accumulation caused by the closure of the shell, reduces the operating temperature of the LED lamp plate and electronic components, slows down the thermal aging, and significantly improves the service life and light efficiency stability of the lamp in an outdoor closed environment.

The utility model relates to the technical field of wire harnesses, in particular to a multi-core high-efficiency heat dissipation type wire harness, which comprises a plurality of groups of core wires, the core wires adopt conductors with hollow structures, the conductors are made of high-purity oxygen-free copper, the hollow parts of the core wires are filled with heat-conducting silica gel, and a composite insulating layer is wrapped outside the plurality of groups of core wires. The composite insulating layer is formed by an inner polyimide insulating layer and an outer graphene heat dissipation coating, the shielding layer is formed by weaving tinned copper wires with the weaving density not lower than 85% and wraps the composite insulating layer, the outer sheath is made of a silicone rubber material, and longitudinal heat dissipation grooves distributed in a spiral shape are formed in the outer sheath. And heat dissipation holes are formed in the shielding layer and the outer sheath. The beneficial effects of the utility model lie in that the core wire of the hollow structure is matched with the heat conduction silica gel, and a three-dimensional heat dissipation channel formed by the spiral longitudinal heat dissipation grooves and the transverse heat dissipation holes, so that the heat generated by the core wire can be quickly and effectively dissipated, compared with a traditional wire harness, the heat dissipation efficiency is obviously improved, and the operation temperature of the wire harness can be effectively reduced.

The utility model relates to the field of air cooling network chain conveying belts, and discloses an air cooling network chain conveying belt which comprises a fixing frame, a plurality of fans are arranged on one side of the fixing frame, oil conveying mechanisms are arranged at the upper ends of the front positions of the two sides of the fixing frame, and a plurality of conveying mechanisms are arranged in the fixing frame. According to the utility model, through the design of the oil conveying mechanism and the oil brushing mechanism, the chain is automatically lubricated and maintained, in the oil conveying mechanism, the controller can accurately adjust the conveying amount of lubricating oil and automatically supply oil according to the running time or distance, so that the lubricating frequency is matched with the wear requirement of the chain, and the stainless steel net chain obviously improves the corrosion resistance of the equipment; compared with a traditional metal carrier roller, the nylon carrier roller not only can support the network chain, but also can prevent the network chain from being abraded, the service life of the network chain is prolonged, the manual maintenance workload is effectively reduced through automatic lubrication of the chain, the equipment failure risk caused by untimely lubrication is reduced, and the comprehensive operation and maintenance cost of equipment is reduced.

The utility model discloses a special superspeed servo motor double cooling cavity shell for glass polishing, particularly relates to the technical field of servo motor shells, and comprises a shell, one end of the shell is provided with an end cover, the other end of the shell is provided with a protective cover, and the middle part of the shell is provided with a first cooling cavity. According to the utility model, the cooling liquid circularly flows among the second cooling cavity, the first cooling cavity and the heat exchange cavity under the driving of the liquid pump, the double-cooling-cavity structure is combined with the heat conduction strips, the heat conduction rings, the heat dissipation fin rings and other parts to form an all-dimensional and multi-layer heat dissipation system, the first cooling cavity directly cools the core parts of the motor, and the second cooling cavity directly cools the core parts of the motor. The heat conduction strips rapidly conduct heat, the heat exchange cavities achieve heat exchange of cooling liquid, the cooling fin rings and the fan blades enhance the air cooling effect, multiple heat dissipation modes are in synergistic effect, the heat dissipation efficiency is greatly improved, the running temperature of the motor can be rapidly and effectively reduced, and the stability and reliability of the motor in ultra-high-speed running are guaranteed.

The invention relates to the technical field of photovoltaic, in particular to a photovoltaic unit, a photovoltaic air conditioner integrated unit and a control method. The photovoltaic unit comprises a photovoltaic module, an air duct, a fan and a first circulating system, wherein the air duct is arranged on the back surface of the photovoltaic module, and an air cavity is defined by the air duct and the photovoltaic module; the fan is configured to drive air to pass through the air cavity; the first circulating system comprises a liquid collecting disc, a medium pump, an auxiliary heat exchanger and a spraying assembly which are connected through a pipeline, the spraying assembly is arranged in the air cavity, and the liquid collecting disc is arranged at the lower end of the air channel and used for receiving a first medium discharged from the air cavity; and the medium pump is configured to drive a first medium in the liquid collecting tray to enter the spraying assembly after passing through the auxiliary heat exchanger. The first medium can recover waste heat generated by the photovoltaic module in the circulation process, heat directly discharged to the environment is reduced, heat transfer and recycling are achieved through the auxiliary heat exchanger, and the overall energy efficiency of the system is improved.

This invention relates to a shape memory alloy-driven dual-mode thermal management film, composed of a three-layer asymmetric structure: a radiative cooling functional layer, a shape memory driving layer, and a solar energy absorption functional layer. The NiTi alloy sheet can reversibly flatten and roll up within a temperature range of 25℃–35℃, automatically switching between cooling and heating modes without external energy: at high temperatures, the radiative cooling layer faces outwards, with a reflectivity ≥0.94 and emissivity ≥0.95, resulting in a temperature drop of 5–15℃; at low temperatures, the solar energy absorption layer faces outwards, with an absorptivity ≥0.88 and emissivity ≤0.28, resulting in a temperature rise of 8–20℃. The total film thickness is <0.6 mm, allowing for roll production and installation via adhesive or magnetic bonding. It reduces HVAC energy consumption by 20–40% annually and is suitable for applications such as building roofs and agricultural greenhouses.

The utility model discloses a fuel gas booster pump driving device with a radiating fin structure, which comprises a boosting driving unit arranged in a fuel gas booster pump, the boosting driving unit comprises a main piston cylinder and an auxiliary piston cylinder which are fixedly communicated in sequence, the outer wall of the auxiliary piston cylinder is fixedly communicated with two fuel gas pipes, and the two fuel gas pipes are communicated with the main piston cylinder. The pipe walls of the two gas pipes are both sleeved with gas one-way valves, a linear reciprocating motor is fixedly installed at the top of the main piston cylinder, and the output end of the linear reciprocating motor penetrates through the main piston cylinder in a sealed and sliding mode and is fixedly connected with a pressurizing piston assembly. Cold air is guided into the main piston cylinder through the one-way air suction assembly, heated air in the main piston cylinder is exhausted through the one-way exhaust assembly, active exchange of heat in the main piston cylinder is achieved, heat conduction with outside air is continuously conducted through a large number of cooling fins, heat dissipation of the surface of the cylinder body is accelerated, and the service life of the main piston cylinder is prolonged. And the operating temperature of the cylinder body is effectively reduced.

The utility model relates to the technical field of motor end cover structures, in particular to a shaded pole motor end cover structure installed in an embedded mode, which comprises an end cover main body and is characterized in that the end cover main body is formed by combining an upper end cover, an annular base and a lower end cover, and the outer walls of the tops of the upper end cover and the lower end cover are both provided with blade type heat dissipation structures distributed in a radial mode. The side face of the upper end cover is provided with an axially-protruding embedded connection part, a plurality of fixing bolts are evenly distributed at the joint of the upper end cover, the annular base and the lower end cover, and a rotor connection shaft is arranged in the center of the outer wall of the top of the lower end cover. According to the embedded shaded pole motor end cover structure, the assembly flexibility and the maintenance convenience are remarkably improved through the modular layered design (the upper end cover, the annular base and the lower end cover are combined), and damaged parts are allowed to be independently replaced without overall disassembly; efficient airflow circulation is formed through the synergistic effect of the blade type heat dissipation structure and the annular heat dissipation grooves, and the running temperature of the motor is effectively reduced.

The invention relates to the technical field of power cables, in particular to a dynamic heat dissipation low-voltage large-current power cable which comprises a conductor layer, an inner insulating layer and an outer insulating layer. An accommodating cavity is formed between the inner insulating layer and the outer insulating layer; an armor layer is arranged on the inner wall of the accommodating cavity; a thermal expansion unit is arranged in the accommodating cavity; the thermal expansion unit comprises an outer metal expansion layer and an inner metal expansion layer. During low-current operation, the thermal expansion unit is in a non-expansion state, and the cable naturally dissipates heat and keeps good flexibility through the outer insulating layer and the inner insulating layer; during large-current operation, the diameter of the thermal expansion unit is increased, the thermal expansion unit abuts against the inner wall of the containing cavity and the armor layer, a plurality of efficient thermal channels are formed through the high thermal conductivity of metal materials, and internal heat is rapidly conducted out. According to the cable, adaptive adjustment of heat dissipation efficiency and use performance is realized through a dynamic heat dissipation structure, mechanical strength, insulation reliability and laying convenience are considered, and the cable is suitable for various low-voltage large-current transmission scenes.

The present application relates to a kind of byproduct comprehensive utilization preparation anhydrous hydrogen fluoride method, the fluorosilicic acid solution with the concentration of 12%-18% in the byproduct of wet-process phosphoric acid production process and the unqualified product in the production process of Mannheim potassium sulfate are reacted, then vacuum filtration is separated to obtain potassium fluosilicate filter cake and dilute sulfuric acid solution containing KCl, K2SO4 Such salt substances.Fluorosilicate potassium filter cake is added in more than 95% hot concentrated sulfuric acid and is decomposed, vacuum distillation and stirring are carried out during reaction process, SiF4, HF gas and potassium sulfate-containing solution are obtained, and the potassium sulfate-containing solution is recycled after cooling and returns to the first step.The raw materials used in the whole process are byproducts, and the cost is low.The byproduct of Mannheim potassium sulfate used not only can improve the fluorine yield of process system, but also can alleviate the situation that silicon dioxide is converted into silicon gel to block the process system.All substances in the process, waste water, waste gas and waste residue are recycled, and the whole process is safe and energy-saving.