6results about How to "Solve heat dissipation difficulties" patented technology

This utility model belongs to the field of lubrication and sealing of drive axles in engineering machinery, and in particular, a semi-sealed lubrication structure for the front-stage reduction gearbox of an engineering machinery drive axle. It includes a connecting housing for the front-stage reduction gearbox, the exterior of which is connected to the main reducer via a bearing housing. Inside the connecting housing and the main reducer, a spiral bevel gear pair is installed for power transmission. A bearing is located between the spiral bevel gear pair and the bearing housing, and an internal gear ring is fitted onto the spiral bevel gear pair. An oil retainer ring is provided within the oil reservoir, comprising an annular portion and a cylindrical portion. The annular portion covers the lubricating oil hole, and the cylindrical portion abuts against the gear ring portion of the internal gear ring. This utility model adopts a semi-closed cavity structure, where the axle oil and the primary transmission oil are not completely isolated, achieving a certain heat dissipation effect. Simultaneously, it retains a semi-isolated oil cavity, preserving the fluidity of the lubricating oil. The structure is simple and the cost is low.

The utility model provides a sealing type frequency converter structure with heat radiation applied to the frequency converter field, comprising a frequency converter housing and a heat conduction substrate, one side of the heat conduction substrate is provided with a longitudinal plate, one side of the heat conduction substrate is also provided with an installation substrate, one side of the installation substrate is fixedly provided with heat radiation sleeve plates, and an installation cavity is arranged among the bottoms of the plurality of heat radiation sleeve plates. A guide groove is formed in the heat dissipation sleeve plate, and one end of the longitudinal plate extends to penetrate through the guide groove into the mounting cavity and is fixedly provided with a horizontal pressing plate; a buffering bag is clamped between the horizontal pressing plate and the mounting base plate, buffering pads are fixed to the upper side and the lower side of the buffering bag, and a plurality of buffering springs are fixed between the two sets of buffering pads at equal intervals. Through the combination of the longitudinal plates, the heat dissipation sleeve plates, the side heat dissipation plates and the heat dissipation fins, a multi-path heat dissipation structure is formed, the heat dissipation area is increased, the heat dissipation efficiency is remarkably improved in combination with the circular flow of the heat dissipation liquid in the buffer bag, and the problem of difficult heat dissipation of the sealed type frequency converter is solved.

The utility model relates to the technical field of commutators, in particular to a pear hook type commutator seat with a good wear-resistant effect, which comprises a base, copper sheets, a pear hook frame, a connecting seat and a fixing piece, the outer side of the base is provided with a plurality of groups of copper sheets, and one end of each copper sheet is provided with a hook corner. Compared with a traditional key groove connection mode, the novel structure is provided with the mounting groove, the bearing groove and the like, a certain space is formed between the base and the pear hook frame, channels for air circulation are increased, heat dissipation is facilitated, the problem that heat dissipation is difficult after a commutator is used for a long time is solved, and the commutator is simple in structure and convenient to use. The optimized connecting structure reduces direct friction at the joint of the base and the rotating shaft. And the pear hook frame is connected with the base through the connecting seat, so that disassembly, assembly and replacement are convenient, the fixing piece is stable, abrasion caused by friction is reduced, the service life of the commutator seat is prolonged, and the precision of equipment is ensured.

A kind of waste oil processing device, including oil tank, heat sink and stirring device, oil tank is vertical tank body, the top of oil tank is equipped with waste oil inlet, nitrogen inlet, antistatic agent inlet and torch pipe, the bottom of oil tank is equipped with waste oil outlet, nitrogen and antistatic agent are injected into oil tank by nitrogen inlet and antistatic agent inlet, one hand reduces the generation of static electricity, the other hand excludes air, prevents the appearance of fire source and oxide in oil tank, to prevent waste oil spontaneous combustion.The design not only can prevent the appearance of fire source and oxide in oil tank, to prevent waste oil spontaneous combustion, effectively improve the safety of waste oil processing device, but also can reduce the temperature of liquid in tank body by heat exchange, to prevent the temperature of tank body is too high and leads to waste oil spontaneous combustion.

The utility model discloses a permanent magnet motor with a novel cooling structure, which relates to the technical field of permanent magnet motors and comprises a shell, a plurality of air holes are formed in two ends of the shell, and a base is mounted at the lower end of the shell; an inner container is installed in the shell, and an annular cavity is formed in the inner container. According to the utility model, through cooperation of the fan, the cooling fins and the air holes, external cold air can be conveniently and rapidly introduced into the motor to realize circulating ventilation and heat dissipation, the internal temperature of the motor is effectively reduced, and the cooling effect is improved; through cooperation of the cooling fins and the inner container, heat generated by rotation of the rotor winding and the stator winding can be conveniently and rapidly transmitted to the outside of the shell, and the cooling effect is improved. Through cooperation of the water inlet pipe, the water outlet pipe and the annular cavity, heat absorbed by the inner container can be cooled conveniently, meanwhile, the heat is taken away through water circulation, a multi-dimensional heat dissipation system is formed, cooling efficiency is improved, and finally the problem that heat dissipation in the permanent magnet motor is difficult is solved.

A circuit supporting high-current charging detection, mounted on a circuit board, includes an input source for connecting to an external power supply; a charging detection circuit for detecting the charging current and outputting a charging detection signal to a battery and an MCU, comprising at least a diode module, a sampling resistor module, and an optocoupler; the diode module includes at least multiple first power diodes connected in parallel, with the anodes of all first power diodes connected to the input source and the cathodes connected to the positive terminal of the battery; the sampling resistor module has one end connected to the common terminal of the input source and the diode module, and the other end connected to the first pin of the optocoupler, including multiple sampling resistors connected in parallel; the second and third pins of the optocoupler are grounded, and the fourth pin is connected to the MCU; the battery is used to adjust the charging current according to the charging detection signal. This invention can accurately detect the high-current charging state and flexibly adjust the resistance and power of the sampling resistors to meet the detection requirements of different current ranges.