10results about How to "Reduce operating temperature rise" patented technology

The application provides a crosslinked polyethylene insulated cable and a preparation process thereof, and belongs to the technical field of cables, and comprises the following steps: step S1, preparing UiO-66-F4 masterbatch; step S2, preparing hexagonal boron nitride masterbatch and nano-alumina masterbatch; step S3, preparing insulation granules; step S4, performing three-layer co-extrusion on a copper core conductor to form a conductor shielding layer / insulation layer / insulation shielding layer, and then performing CV crosslinking, cooling, degassing, and then coating a metal braided shielding layer and an outer sheath to obtain the crosslinked polyethylene insulated cable. The application can improve the DC breakdown strength and long-term insulation stability of the crosslinked polyethylene insulated cable.

The application is suitable for the field of robot technology, and provides a high-torque-density axial flux brushless motor and a robot joint module.The high-torque-density axial flux brushless motor comprises a high-torque-density axial flux brushless motor body; a speed reducer is arranged on one side of the high-torque-density axial flux brushless motor body, and an input shaft of the speed reducer is fixedly connected with an output shaft of the high-torque-density axial flux brushless motor body through a shaft coupling; the high-torque-density axial flux brushless motor body comprises an outer shell; a cooling mechanism is arranged on the outer shell, the cooling mechanism is used for reducing the temperature of the high-torque-density axial flux brushless motor body, and the cooling mechanism is integrated with an air inlet, an air outlet, a heat conduction and heat dissipation mechanism and an auxiliary cleaning mechanism, so that efficient heat dissipation and temperature regulation of the motor body are realized, the motor operating temperature rise can be significantly reduced, and the risk of demagnetization of a permanent magnet and aging of a winding is reduced.

The invention relates to a capacitive high-voltage insulated bus and a manufacturing method thereof, and belongs to the technical field of high-voltage insulated buses, and the manufacturing method comprises the following steps: S1, conductor pretreatment: carrying out oil removal, oxide layer removal and sand blasting roughening treatment on the surface of a central conductor; s2, multi-layer material co-extrusion: pulling the preheated central conductor to pass through a multi-layer co-extrusion head at a constant speed; s3, synchronous cross-linking and forming: immediately guiding the multi-layer blank into a closed synchronous cross-linking and forming pipeline; and S4, post-processing and assembling: performing appearance detection, partial discharge test and withstand voltage test on the cross-linked bus. According to the capacitive high-voltage insulated bus and the manufacturing method thereof, an integrated composite capacitor structure composed of the inner semiconductor layer, the stepped capacitor layer and the outer semiconductor layer is designed, so that the potential between the high-voltage conductor and the grounding shell is linearly and uniformly distributed, and the phenomenon of electric field concentration is thoroughly eliminated; and the long-term insulation life and the operation voltage grade are obviously improved.

This utility model belongs to the field of fan blade technology and discloses a multi-blade noise-reducing blower fan blade, including: a fan blade assembly comprising 53 forward-curved fan blades evenly distributed along the circumference of a hub, with a motor mounting cavity at the center of the hub; the axial end face of the hub has several heat dissipation holes, arranged equidistantly along the circumference to form an annular heat dissipation channel; a motor assembly comprising a thickened silicon steel sheet frame, the silicon steel sheet thickness being 0.5-0.8mm; the ratio of the fan blade diameter D to the fan outer diameter D0 is 75%-78%; this utility model, by using 53 forward-curved fan blades with an optimized bending angle of 15°-25°, and a chord length ratio of the leading edge to the trailing edge of the blades of 1:0.8-1:0.9, effectively suppresses turbulence and eddy noise. An arc-shaped transition section with a transition radius R = 3-5mm is provided at the connection between the hub and the fan blades to reduce airflow separation noise.

The invention provides a conductive loop of a molded case circuit breaker, which mainly solves the problems of insulation protection and quick action in the fault current breaking process of the molded case circuit breaker, and comprises a contact piece, a contact, a rotating shaft, a shell, a protective cover, a flexible connector, a conductive piece, a fixed piece and an elastic piece. The contact is tightly attached and fixed to one end of the contact piece, the other end of the contact piece is fixedly conducted with one end of the flexible connector, the other end of the flexible connector is fixedly conducted with the conductive piece, and the contact, the contact piece, the flexible connector and the conductive piece are sequentially connected and conducted to jointly form a conductive loop of the molded case circuit breaker. The flexible connector is provided with an upper flexible section and a lower flexible section, and the space between the upper flexible section and the lower flexible section is hollow, so that circulation of heat dissipation air in the middle is facilitated, and related heat is taken away. Through the electromagnetic force between the upper flexible section and the lower flexible section, the speed of the upward overturning action of the contact piece is increased, and the molded case circuit breaker can cut off current more quickly. A conductive section protective tongue arranged on the protective cover is coupled with the limiting block, so that the contact piece is isolated from the arc extinguishing cavity in the shell, and the contact piece is prevented from being damaged by high-temperature metal particles and non-metal particles in the arc extinguishing cavity when the molded case circuit breaker breaks current.

The invention provides a crosslinked polyethylene insulated cable and a preparation process thereof, and belongs to the technical field of cables, and the preparation process comprises the following steps: step S1, preparing UiO-66-F4 master batch; s2, preparing a hexagonal boron nitride master batch and a nanometer aluminum oxide master batch; s3, preparing insulating granules; and S4, carrying out three-layer co-extrusion on the copper core conductor to form a conductor shielding layer / an insulating layer / an insulating shielding layer, then carrying out CV crosslinking, cooling and degassing, and then coating a metal braided shielding layer and an outer sheath to obtain the crosslinked polyethylene insulated cable. The direct-current breakdown strength and the long-term insulation stability of the crosslinked polyethylene insulated cable can be improved.

The utility model discloses a multi-wind-zone forced heat radiation motor casing, which relates to the field of generators and comprises a casing main body, and a generator stator and a generator rotor are arranged in the casing main body. A ventilation air path system used for guiding air to flow and discharging heat of the generator stator and the generator rotor is further arranged in the machine shell body. The ventilation air path system comprises a hot air area and a cold air area; the hot air areas and the cold air areas are symmetrical along the center line of the machine shell body and are arranged in a staggered mode, and the number of the hot air areas is larger than that of the cold air areas. The hot air areas and the cold air areas are alternately arranged, so that air can flow more effectively in the heat dissipation process; meanwhile, the generator stator and the generator rotor are subjected to forced heat dissipation by adopting the multi-wind-area casing, so that the heat dissipation effect of the generator stator and the generator rotor is improved.

The utility model relates to a direct cooling system installed on an air-air cooling generator, which comprises an air filtering unit, a dehumidification unit, an air outlet unit, an air outlet channel and an air inlet channel, the air outlet unit is connected with the dehumidification unit through one end of the air outlet channel, and the other end of the air outlet channel is used for being connected with an air outlet of an air-air cooler. The air filtering unit is connected with the dehumidification unit through one end of an air inlet channel, the other end of the air inlet channel is used for being connected with an air inlet of the air-air cooler, and the air inlet of the air-air cooler and an air outlet of the air-air cooler are formed in the diagonal positions of the dehumidification unit. Under the condition that the original air-air cooling mode of the generator is not changed, after a set of direct cooling system is added, heat generated in the generator can be directly eliminated, the running temperature rise of the generator is rapidly reduced, unit shutdown caused by high temperature of the generator is effectively avoided, and the generating capacity of a wind turbine generator is improved.

The application discloses an integrated water ring vacuum pump with a crushing function, and relates to the technical field of water ring vacuum pumps.The device integrates the functions of crushing, pumping, sealing and cooling in the same pump body.The bearing part is sequentially bolted with a transparent observation plate and a multistage shell to form a front crushing cavity and a rear working cavity.The transmission part adopts an outer rotor structure, the rotor suspends an arm fixed cutter and a spiral pump blade, and coaxially sleeves a fixed cutter.The sewage containing sundries enters the crushing cavity through an inlet pipe, is axially and radially sheared and ground by the passive cutter and the fixed cutter, is immediately pumped into the working cavity by the spiral pump blade to establish a water ring vacuum, and is finally discharged through an outlet pipe.The rotor is directly immersed in water for cooling, and an external fan or a circulating water circuit is not needed.The application cancels the traditional split arrangement of a pump, a coupling, a motor and a front crusher, has the advantages of compact structure, small occupation, anti-winding, anti-clogging, low temperature rise, small vibration and noise, convenient maintenance and the like.

The invention discloses a mining flame-proof wiring terminal which comprises an insulating seat body, a conducting rod arranged in an axial through hole of the insulating seat body in a penetrating mode, and a pressing assembly. An independent explosion-proof joint surface is not formed between the conducting rod and the insulating seat body; the insulating seat body is directly fixed on the equipment separator through screws, so that only a joint surface between the outer cylindrical surface of the insulating seat body and the inner wall of the separator mounting hole is formed. The upper connecting part of the conducting rod can select a pre-embedded screw rod type or an insert nut type, and the lower connecting part can select a flat copper bar type or an internal thread cylinder type, so that various wiring schemes are combined. Through the integrated structure, the number of parts is greatly reduced, assembly procedures are greatly simplified, and the material cost and the manufacturing cost are greatly reduced; the intrinsic safety is improved from the source due to the design of a single explosion-proof joint surface; the overall structure is compact and the size is obviously reduced; the installation mode is simple and fast; the modular wiring form is high in adaptability, and a flexible, reliable and economical mining explosion-proof connection solution is provided for users.