35results about How to "Reduce operating temperature rise" patented technology

The invention discloses a box body of a subway gear box. The box body comprises an upper box body and a lower box body, wherein the inner wall of the upper box body is provided with a large bearing oil collecting groove and a small bearing oil collecting groove, the large bearing oil collecting groove consists of a first box wall section and a first oil groove baffle plate and is positioned at the upper part of a large bearing seat support hole, the bottom of the large bearing oil collecting groove is communicated with the large bearing seat support hole through a large bearing oil inlet hole, the upper part of the large bearing oil collecting groove is provided with an oil baffle plate, the small bearing oil collecting groove consists of a second box wall section and a second oil groove baffle plate and is positioned at the upper part of a small bearing seat support hole, the annular section of the small bearing oil collecting groove is in semicircular extending around the small bearing seat support hole of the upper box body, an included angle alpha between the axial line of an inclined section and the horizontal center line is 15 degrees to 30 degrees, one end of the inclined section is connected with the annular section, the other end of the inclined section extends in the direction towards the large bearing support hole or extends to the large bearing seat support hole, and the small bearing oil collecting groove is communicated to the small bearing seat support hole. The box body has the advantages that a gear box bearing can be effectively and reliably lubricated, and the heat radiation effect is good.

The invention relates to a coreless permanent magnet power generation and electric device. The power generation device comprises a shaft body, a shell and a power generation component. The shell and the shaft body can relatively rotate. The power generation component comprises a rotor component and a stator component. The rotor component comprises a magnet yoke and magnets which are installed on the magnet yoke. The stator component comprises an integrated coil. The magnet yoke comprises at least one cylindrical part which is coaxial with the shaft body and at least one dish-shaped part which is perpendicular to the shaft body. The integrated coil comprises at least one cylindrical part which is coaxial with the shaft body and at least one dish-shaped part which is perpendicular to the shaft body. The cylindrical parts of the magnet yoke and the integrated coil are opposite, and the opposite surfaces of the cylindrical parts of the magnet yoke are provided with magnets. The dish-shaped parts of the magnet yoke and the integrated coil are opposite, and the opposite surfaces of the dish-shaped parts of the magnet yoke are provided with magnets. The coil is integrated so that copper loss can be reduced, damping and iron loss can be eliminated, driving power can be eliminated, thermal loss can be reduced, the size is small, the weight is low, the material can be saved, the speed regulation range is wide and the precision is high.

The invention relates to a double-equal pole double-section stator / rotor reluctance generator, comprising two sections of stators and rotors of a salient pole structure or a non-salient-pole structure formed by laminating silicon-steel plates. A stator salient pole is provided with armature concentrated windings or layer windings; the windings are connected in series or in parallel according to the N-N polarity of the armature windings to form a phase, and the windings are connected in series or in parallel according to the S-S polarity of the armature windings to form the other phase; the rotors are equipped with rotating magnetic poles with the same pole number with the stators, and the adjacent pole windings of the rotors are connected in series or in parallel to form a plurality of N and S groups; the rotors can adopt excitation magnetic poles and permanent magnetic poles in different forms and permanent magnetic and electro-magnetic mixed poles, and a rotor excitation device is arranged on a motor shaft; each rotor can be divided into an inner rotor and an outer rotor; and the armature windings can be arranged on the stators or the rotors. In the invention, by adopting an equal-pole-number stator / rotor technology and series / parallel connection dynamic combination of the windings, output voltage can be regulated conveniently, the utilization ratio of the windings is improved, and power density and efficiency of the generator are enhanced.

The invention relates to disk-type DC motors, particularly to a disk-type coreless permanent-magnetic brushless DC motor. The technical scheme comprises that the disk-type coreless permanent-magnetic brushless DC motor comprises two housings which are connected in a sealed mode, two end covers correspondingly arranged on the housings, and two bearings correspondingly arranged on the end covers. Each end cover is provided with a stop flange which extends to the end surface of the corresponding bearing, and an O-shaped seal ring is arranged between each stop flange and the end surface of the corresponding bearing. The disk-type coreless permanent-magnetic brushless DC motor also comprises an armature winding, the armature winding is in a ring shape and comprises an arc-shaped first part away from the a shaft, an arc-shaped second part close to the shaft, and arc-shaped third parts connected between both ends of the first part and the corresponding ends of the second part; the connection line of the centers of the first part and the second part is disposed in the middle section of the armature winding; the inner diameter of the first part is 1.5-2 times as large as that of the second part. The disk-type coreless permanent-magnetic brushless DC motor has good sealing performance and a high magneto-electricity conversion rate.

The invention discloses a semi-direct drive megawatt-level permanent-magnet windmill generator which relates to the technical field of windmill generators. The semi-direct drive megawatt-level permanent-magnet windmill generator comprises a permanent magnet fixing structure, a cooling ventilation structured bearing insulating structure and a stator core compaction structure, wherein the permanentmagnet fixing structure comprises a magnetic steel fixed mount and a stainless steel bolt, and the magnetic steel fixed mount is used for installing the permanent magnet; the bottom of the magnetic steel fixed mount is closely laminated with the permanent magnet; joint lugs on both ends of the bottom of the magnetic steel fixed mount are provided with through holes which are matched with the stainless steel bolt; and the magnetic steel fixed mount is connected with a rotor cylinder through the stainless steel bolt. In the invention, the defect of unfirm fixation of the prior high-power surface type permanent-magnet rotor permanent magnet on the rotor is overcome, thereby ensuring the reliability and efficiency of the generator, and the defects in the prior ventilation structure is also overcome, thereby increasing the length of the wind path, enhancing the heat elimination efficiency and further effectively lowering the operation temperature rise of the motor.

A capacity increased low voltage frequency variable speed regulation integrated device, which is characteristic of that the output end of high voltage switch cabinet connected with the high voltage input end of transformer whose low voltage output end connected with the incoming line end of input side switch of frequency variator in power frequency / frequency variation switching device, the outgoing line end of switch connected with the input end of low voltage frequency variator. Said invention has advantages of high power, high efficiency, high reliability, sub harmonic, low temperature raising and energy saving etc.

The invention discloses an F-grade heat-resisting solvent impregnated resin suitable for vacuum pressure and normal temperature. The F-grade heat-resisting solvent impregnated resin is prepared by mixing 100 portions of a composition A and 80 to 120 portions of a composition B, wherein, according to weight portion, the composition A is prepared by mixing 60 to 90 portions of I-epoxide resin, 10 to 40 portions of II-epoxide resin and 2 to 4 portions of a stabilizing agent; the composition B is prepared by mixing 80 to 120 portions of fluid estolide and 10 to 20 portions of a plasticizer; and the I-epoxide resin is a bisphenol A-type expoxide resin. The composition A and the composition B are respectively packaged and stored separately and are used by mixing according to the ratio of 1 to 0.8-1.2. The solvent impregnated resin is used together with special dry mica tape and special moderate-resin mica tape which contain a curing accelerating agent and are matched with the solvent impregnated resin specially. The F-grade heat-resisting solvent impregnated resin has the advantages of cleanliness, environment protection, rapid high temperature solidification, small mass loss in the curing process and high purity quotient of each component.

The invention provides a metal thin film filtering capacitor for a frequency converter. The filtering capacitor includes a core assembly which is formed by wrapping at least one group of thin film layer which includes a double face metallization polypropylene thin film or a double face metallization polyester thin film and a medium layer, wherein the double face metallization polypropylene thin film or the double face metallization polyester thin film is provided with a metal layer separately on the upper face and the lower face of the polypropylene thin film or the polyester thin film, and one metal layer is an aluminum metal layer and the other metal layer is a zinc metal layer. The filtering capacitor also includes an encapsulated layer which is wrapped in the peripheral side of the core assembly. The filtering capacitor further includes a pin which is connected to the core assembly and extends beyond the encapsulated layer. According to the invention, the metal thin film filtering capacitor for the frequency converter is characterized by high breakdown electric field intensity, long service life, and excellent self-healing property.