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CN-122026668-A - Direct current motor with speed-following temperature control adjusting device

CN122026668ACN 122026668 ACN122026668 ACN 122026668ACN-122026668-A

Abstract

The invention relates to the technical field of direct current motors, in particular to a direct current motor with a speed-following temperature control adjusting device. The direct current motor with the speed-following temperature control adjusting device is characterized in that an upper flow guide chamber and a lower flow guide chamber which are mutually independent are arranged in the lateral strip-shaped radiating fins, flow disturbing convex points in the chambers are matched, so that the heat exchange path of cooling liquid is greatly prolonged, meanwhile, the cooling liquid is in a turbulent state, the heat exchange contact area of the cooling liquid and the radiating fins is increased, the turbulent heat exchange effect is enhanced, and the high-efficiency forced driving of the cooling liquid by combining with the arc-shaped external driving blades with streamline flow guide grooves is realized, so that the cooling liquid forms directional and high-speed closed circulation between the flow guide rings and the chambers of the radiating fins, the heat exchange efficiency is improved, and the high heat dissipation requirement of the direct current motor with high power density and small volume is completely adapted.

Inventors

  • Yao Jiugang
  • CHEN CHUNHUA
  • ZHANG WENJUN
  • ZHANG HAOJIE
  • WU JIAWEI

Assignees

  • 江苏曼淇威电气产品有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (6)

  1. 1. The direct current motor with the speed-following temperature control adjusting device comprises a main machine shell (1), a stator and a rotor shaft (2), and is characterized in that two ends of the outer side surface of the main machine shell (1) are integrally formed with outwards-protruding hollow guide rings (3), dovetail-shaped mounting slots (4) are symmetrically formed in adjacent surfaces of the hollow guide rings (3), a plurality of equidistant lateral strip-shaped radiating fins (5) are arranged on the outer side arc surface of the main machine shell (1), an inner driving ring (6) is movably assembled in the hollow guide rings (3) through annular sliding rails (29), a plurality of arc-shaped external driving blades (7) which are distributed in an annular array are integrally formed in the outer side arc surface of the inner driving ring (6), synchronous driving discs (8) are connected with axial keys on the outer side of the rotor shaft (2), and at least three groups of speed-following adjusting devices (9) are uniformly arranged on the synchronous driving discs (8) along the radial direction; The two ends of the lateral strip-shaped radiating fins (5) are fixedly provided with dovetail assembly seats (17) which are matched with the dovetail mounting slots (4), the lateral strip-shaped radiating fins (5) are inserted into the dovetail mounting slots (4) through the dovetail assembly seats (17) and fixedly communicated with the hollow guide ring (3) in a sealing way, and the matching surfaces of the dovetail assembly seats (17) and the dovetail mounting slots (4) are embedded with high-temperature-resistant sealing rubber rings (31); An embedded first permanent magnet (20) is embedded on the inner arc surface of the inner driving ring (6) at equal intervals, a high-permeability embedded magnetizer (21) is embedded on the inner arc surface of the hollow diversion ring (3) corresponding to the embedded first permanent magnet (20), an embedded second permanent magnet (22) which is in magnetic attraction fit with the embedded first permanent magnet (20) is embedded on the outer end surface of the speed-following control device (9), and the embedded first permanent magnet (20), the high-permeability embedded magnetizer (21) and the embedded second permanent magnet (22) jointly form a magnetic coupling driving mechanism (23) with adjustable magnetic coupling strength; a plurality of built-in telescopic slots (24) with outside openings are formed in the synchronous driving disc (8) in the radial direction, counter-bore type elastic reset slots (25) are symmetrically formed in the inner walls of the two sides of the built-in telescopic slots (24), and guide sliding slots (33) are formed in the inner sides of the counter-bore type elastic reset slots (25); the speed-following control device (9) comprises a telescopic block (26) which is in sliding connection with the built-in telescopic groove (24), guide type lateral extrusion blocks (27) which are fixed on two sides of the telescopic block (26) and are in sliding fit with the guide sliding grooves (33), and variable stiffness extrusion springs (28) which are sleeved on the outer sides of the guide type lateral extrusion blocks (27) and are arranged in the sinking type elastic reset grooves (25), wherein two ends of the variable stiffness extrusion springs (28) are respectively abutted against the inner side walls of the sinking type elastic reset grooves (25) and the guide type lateral extrusion blocks (27).
  2. 2. The direct current motor with the speed-following temperature control adjusting device is characterized in that an arc-shaped outer limiting cover (10) is assembled on the outer side face of the hollow guide ring (3) in a sliding mode, the outer limiting cover (10) is fixedly assembled with the hollow guide ring (3) through flange type lateral bolts (11), a sealed type strip-shaped limiting groove (12) matched with the lateral strip-shaped radiating fins (5) is formed in the outer side face of the main machine shell (1), an outer liquid injection hole (14) with a built-in sealed type detachable plug (13) is formed in the outer side face of the inner driving ring (6), and a high-precision temperature sensor (15) is embedded in the inner driving ring (6).
  3. 3. The direct current motor with the speed-following temperature control adjusting device according to claim 1, wherein horn-mouth type inner guide ports (16) communicated with the inside of the hollow guide ring (3) are formed in the inner walls of the two sides of the dovetail type mounting slot (4) in a staggered mode, and backflow prevention guide valves (30) are embedded in the horn-mouth type inner guide ports (16).
  4. 4. A direct current motor with a speed-following temperature control adjusting device according to claim 3 is characterized in that an upper diversion chamber (18) and a lower diversion chamber (19) which are mutually independent are arranged in the lateral strip-shaped radiating fins (5), two ends of the upper diversion chamber (18) and the lower diversion chamber (19) are respectively communicated with a horn mouth type inner diversion port (16) in a sealing mode, and turbulence convex points (32) are embedded in the two chambers.
  5. 5. The direct current motor with the speed-following temperature control adjusting device according to claim 1, wherein a streamline diversion trench (34) is formed in the outer side face of the arc-shaped external driving blade (7), and chamfering is conducted on the end portion of the arc-shaped external driving blade (7).
  6. 6. The direct current motor with the speed-following temperature control adjusting device according to claim 1, wherein weight-reducing heat dissipation holes (35) are formed in the outer side end face of the synchronous driving disc (8) at equal intervals along the circumferential direction, the weight-reducing heat dissipation holes (35) and the built-in telescopic grooves (24) are arranged in a staggered mode, and the inner walls of the weight-reducing heat dissipation holes (35) are subjected to polishing treatment.

Description

Direct current motor with speed-following temperature control adjusting device Technical Field The invention relates to the technical field of direct current motors, in particular to a direct current motor with a speed-following temperature control adjusting device. Background The DC motor is a rotary driving device for converting DC electric energy into mechanical energy, and consists of a stator, a rotor, a commutator, an electric brush, a casing and other core components, and the working principle of the DC motor is based on the law of electromagnetic induction and the ampere force effect: the stator generates a constant magnetic field, the rotor winding rotates under the action of electromagnetic torque after being electrified, and the current is periodically commutated through the cooperation of the commutator and the electric brush, so that the rotor is ensured to continuously rotate in one direction. The motor has large starting torque, excellent speed regulation performance and quick response, and is widely applied to the fields of precision transmission, industrial automation, rail transit and the like. When the direct current motor operates, the stator winding and the rotor core can continuously generate copper loss and iron loss, if heat cannot be timely dissipated, the internal temperature rise is too high, the insulation structure of the motor is extremely easy to damage, the output efficiency is reduced, and when serious, the permanent magnet demagnetizing failure is also caused, so that the service life and the operation safety of the motor are directly influenced. The existing direct current motor mainly comprises two types, namely natural air cooling and heat exchange by means of natural convection of cooling ribs of a shell and air, the structure is simple, the cooling efficiency is extremely low, the direct current motor cannot be adapted to the application scene of the direct current motor with high power density and small volume at all, liquid cooling heat exchange is carried out between a built-in runner of the shell and cooling liquid, the cooling efficiency is high, the traditional liquid cooling structure is complex in design and high in manufacturing cost, the sealing difficulty of the runner and a motor body is high, the cooling liquid is easy to leak, and the subsequent maintenance operation is complex and the cost is high. Besides the problems, the traditional heat dissipation mode has the core defects that the heat dissipation efficiency is fixed and cannot be adjusted, the heat dissipation effect cannot be automatically adjusted according to the real-time running rotating speed and the power of the direct-current motor, the high heat dissipation power is still maintained during low-load running of the motor, the energy waste is caused, the heat dissipation capability is insufficient and the heat is continuously accumulated during high-load full-power running, meanwhile, the traditional heat dissipation structure is mostly integrated, the heat dissipation components cannot be detached and replaced, when the heat dissipation structure is locally damaged, the whole heat dissipation structure needs to be detached and maintained, the heat dissipation configuration cannot be flexibly adjusted according to the heat dissipation requirement of the practical application working condition, the suitability is poor, in addition, the heat transfer path of the traditional liquid cooling is single, the heat exchange contact area is limited, the whole heat dissipation effect is further restricted, and the comprehensive performance and the working condition adaptability of the direct-current motor are seriously reduced during long-term high-temperature running. Disclosure of Invention The invention aims to solve the technical problems that the traditional heat dissipation mode is difficult to meet the heat dissipation requirement of a direct current motor with high power density and small volume, and the heat dissipation effect cannot be automatically adjusted according to the running power of the direct current motor, so that the internal heat transfer path is single, and the long-term high-temperature running severely restricts the motor performance and the working condition adaptability. The direct current motor with the speed-following temperature control adjusting device comprises a main machine shell, a stator and a rotor shaft, wherein hollow guide rings protruding outwards are integrally formed at two ends of the outer side surface of the main machine shell, dovetail-shaped mounting slots are symmetrically formed on adjacent surfaces of the hollow guide rings, a plurality of equidistant lateral strip-shaped radiating fins are arranged on the outer arc surface of the main machine shell, an inner driving ring is movably assembled inside the hollow guide rings through annular sliding rails, a plurality of arc-shaped external driving blades distributed in an annular array are integrally for