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CN-116418161-B - Permanent magnet motor with sealing and heat dissipation structures

CN116418161BCN 116418161 BCN116418161 BCN 116418161BCN-116418161-B

Abstract

The invention provides a permanent magnet motor with a sealing and radiating structure, which comprises a machine base, a transmission shaft, a transmission end cooling assembly, a positioning end cooling assembly and an electromagnetic driving assembly, wherein the machine base comprises a containing cavity and a cooling channel, the cooling channel is arranged around the containing cavity, the transmission shaft penetrates through the machine base, the transmission end cooling assembly is arranged at one end of the machine base and comprises a first sealing assembly, the first sealing assembly is arranged between the machine base and the transmission shaft, the positioning end cooling assembly is arranged at the other end of the machine base and comprises a second sealing assembly, the second sealing assembly is arranged between the machine base and the transmission shaft, and the electromagnetic driving assembly is arranged in the containing cavity and is connected with the transmission shaft. The permanent magnet motor with the sealing and heat dissipation structure provided by the embodiment of the invention has the advantages that the sealing is reliable, the structure is more compact, the power density of the motor is improved, and the operation efficiency of the motor is improved while the high power and high heat dissipation capacity of the motor are ensured.

Inventors

  • LI XIANGCHENG
  • XUE XIUHUI
  • GUO LANLAN
  • JIANG CHEN
  • Xie Aizheng
  • ZHAO YUKUN
  • WANG JIN

Assignees

  • 中车永济电机有限公司

Dates

Publication Date
20260505
Application Date
20211229

Claims (8)

  1. 1. A permanent magnet motor having a sealing and heat dissipating structure, comprising: The machine base (1) comprises a containing cavity (111) and a cooling channel, wherein the cooling channel is arranged around the containing cavity (111) and is used for cooling air to pass through; the transmission shaft (2) penetrates through the base (1); the transmission end cooling assembly (3) is arranged at one end of the base (1), the transmission end cooling assembly (3) comprises a first sealing assembly (31), and the first sealing assembly (31) is arranged between the base (1) and the transmission shaft (2) and is used for preventing air from entering the accommodating cavity (111); the positioning end cooling assembly (4) is arranged at the other end of the base (1), the positioning end cooling assembly (4) comprises a second sealing assembly (41), and the second sealing assembly (41) is arranged between the base (1) and the transmission shaft (2) and is used for preventing air from entering the accommodating cavity (111); The electromagnetic driving assembly (5) is arranged in the accommodating cavity (111) and connected with the transmission shaft (2) for driving the transmission shaft (2) to rotate; The machine base (1) comprises an inner end cover (12) and a front end cover (13); the positioning end cooling assembly (4) comprises a main fan (43); the second seal assembly (41) comprises: The positioning bearing cover (411) is connected with the inner end cover (12) and is arranged on one side, far away from the accommodating cavity (111), of the inner end cover (12), and a plurality of second sealing grooves are formed in the positioning bearing cover (411) at intervals; Positioning end bearings (412) which are simultaneously connected with the positioning bearing cover (411), the inner end cover (12) and the transmission shaft (2), wherein the positioning end bearings (412) are arranged on one side of the inner end cover (12) far away from the accommodating cavity (111); The fan seat (413) is connected with the transmission shaft (2), the positioning bearing cover (411) and the main fan (43) at the same time, the fan seat (413) is arranged on one side, far away from the accommodating cavity (111), of the positioning end bearing (412), a plurality of second step surfaces are arranged on the fan seat (413), the outer diameters of the second step surfaces are gradually increased from one end, close to the accommodating cavity (111), of the fan seat (413) to the other end, and the positioning bearing cover (411) is arranged in an adaptive manner with the fan seat (413); a rotary transformer (6) connected to the front cover (13) and the drive shaft (2) at the same time; and the filter screen (7) is connected with the front end cover (13) and is arranged on the air inlet (132) of the cooling channel.
  2. 2. A permanent magnet machine with sealing and heat dissipating structure according to claim 1, wherein said first sealing assembly (31) comprises: A driving end bearing (311) which is simultaneously connected with the transmission shaft (2) and the stand (1); the rear bearing cover (312) is connected with the transmission end bearing (311) and the machine base (1) at the same time and is arranged on one side of the machine base (1) far away from the accommodating cavity (111), and a plurality of first sealing grooves are formed in the rear bearing cover (312) at intervals; The transmission seal ring (313) is connected with the transmission end bearing (311) simultaneously transmission shaft (2) with back bearing cap (312), transmission seal ring (313) set up in transmission end bearing (311) keep away from one side of holding chamber (111), be equipped with a plurality of first step faces on transmission seal ring (313), a plurality of the external diameter of first step face is followed transmission seal ring (313) are close to one end that holds chamber (111) is increaseed to the other end step by step, back bearing cap (312) with transmission seal ring (313) adaptation sets up.
  3. 3. A permanent magnet machine with sealing and heat dissipation structure according to claim 2, characterized in that the housing (1) further comprises: The shell (11) is connected with the transmission end cooling assembly (3), the accommodating cavity (111) is arranged on the shell (11), and a first cooling channel (112) is arranged on one side of the accommodating cavity (111) on the shell (11); the inner end cover (12) is connected with the shell (11) and the positioning end cooling assembly (4) at the same time; The front end cover (13) simultaneously with shell (11) with location end cooling subassembly (4) are connected, front end cover (13) set up in inner end cover (12) keep away from one side of holding chamber (111), front end cover (13) with form second cooling channel (131) between inner end cover (12), second cooling channel (131) with first cooling channel (112) intercommunication, and with first cooling channel (112) are constituteed jointly cooling channel, cooling channel's air inlet (132) set up in on front end cover (13).
  4. 4. A permanent magnet machine with a sealing and heat dissipating structure according to claim 3, characterized in that said driving end cooling assembly (3) further comprises: The back auxiliary fan (32) set up in hold chamber (111) in and simultaneously with transmission shaft (2) shell (11) with driving end bearing (311) are connected, be close to on back auxiliary fan (32) one side of shell (11) is equipped with the protruding of a plurality of intervals setting of first card, be equipped with on shell (11) with a plurality of first draw-in grooves of protruding block of first card, transmission shaft (2) drive back auxiliary fan (32) rotate, back auxiliary fan (32) are used for making air flow in holding chamber (111) and export heat.
  5. 5. A permanent magnet machine with sealing and heat dissipating structure according to claim 4, wherein said positioning end cooling assembly (4) further comprises: The front auxiliary fan (42) is arranged in the accommodating cavity (111) and is connected with the transmission shaft (2) and the inner end cover (12) at the same time, a second clamping groove is formed in one side, close to the inner end cover (12), of the front auxiliary fan (42), a second clamping protrusion which is clamped with the second clamping groove is formed in the inner end cover (12), the transmission shaft (2) drives the front auxiliary fan (42) to rotate, and the front auxiliary fan (42) is used for enabling air in the accommodating cavity (111) to flow and leading out heat; The main fan (43) set up in the second cooling channel (131), and simultaneously with transmission shaft (2) inner end cover (12), front end housing (13) with second seal assembly (41) are connected, main fan (43) are close to one side interval of front end housing (13) is equipped with a plurality of third draw-in grooves, be equipped with on front end housing (13) with the third card of third draw-in groove adaptation is protruding, transmission shaft (2) drive main fan (43) rotate, main fan (43) are used for making air flow in the cooling channel, inhale the cold air cooling channel and then export the heat.
  6. 6. The permanent magnet motor with the sealing and heat dissipation structure according to claim 5, wherein the transmission shaft (2) penetrates through the rear auxiliary fan (32), a first positioning protruding block is arranged at one end, far away from the transmission shaft (2), of the rear auxiliary fan (32), a first positioning groove is further formed in the housing (11), and the first positioning protruding block is clamped with the first positioning groove.
  7. 7. The permanent magnet motor with the sealing and heat dissipating structure according to claim 6, wherein a second positioning protrusion is provided on the inner end cover (12), a through hole (431) communicating with the second cooling channel (131) is provided on the main fan (43), and the through hole (431) abuts against the second positioning protrusion near a side wall of the inner end cover (12).
  8. 8. The permanent magnet motor with the sealing and heat dissipation structure according to claim 7, wherein the first cooling channel (112) is arranged in parallel with the transmission shaft (2), and an air outlet (113) of the cooling channel is arranged at one end of the housing (11) close to the transmission end cooling component (3).

Description

Permanent magnet motor with sealing and heat dissipation structures Technical Field The invention relates to the technical field of permanent magnet driving, in particular to a permanent magnet motor with a sealing and heat dissipation structure. Background The traction motor can provide core driving force for a railway train, and the train has severe running environment and is often accompanied with phenomena of wind, sand, rain, snow, haze and the like, such as salt fog, acid rain, sand storm and the like. Therefore, the railway motor is usually in a fully-closed structure, so that dust, particles and other impurities are prevented from entering the motor, and the normal operation of the motor is ensured. Especially, if air directly enters the interior of the motor, moisture, dust and other pollutants carried in the air can corrode the permanent magnet, so that the failure of the permanent magnet is accelerated, the service life of the motor is shortened, and meanwhile, external metal scraps enter the interior of the motor and are adsorbed on the surface of the magnetic rotor, so that the motor is swept and bored, and the motor is burnt. Therefore, the permanent magnet motor must adopt a totally enclosed structure. When the permanent magnet motor has higher power and higher heat productivity, the common air cooling structure can not simultaneously meet the requirements of the permanent magnet motor on the full sealing, large heat dissipation and high power density of the structure. Therefore, designing a totally-enclosed permanent magnet motor structure with large heat dissipation capacity and compact structure solves the above defects to be solved is a technical problem to be solved urgently. Disclosure of Invention In order to solve the above problems, an object of an embodiment of the present invention is to provide a permanent magnet motor with a sealing and heat dissipation structure. The embodiment of the invention provides a permanent magnet motor with a sealing and heat dissipation structure, which comprises the following components: The engine base comprises a containing cavity and a cooling channel, wherein the cooling channel is arranged around the containing cavity and is used for cooling air to pass through; The transmission shaft penetrates through the base; The transmission end cooling assembly is arranged at one end of the base and comprises a first sealing assembly, and the first sealing assembly is arranged between the base and the transmission shaft and is used for preventing air from entering the accommodating cavity; The positioning end cooling assembly is arranged at the other end of the base and comprises a second sealing assembly, and the second sealing assembly is arranged between the base and the transmission shaft and is used for preventing air from entering the accommodating cavity; And the electromagnetic driving assembly is arranged in the accommodating cavity and connected with the transmission shaft and used for driving the transmission shaft to rotate. Preferably, the first sealing assembly comprises: the transmission end bearing is simultaneously connected with the transmission shaft and the base; The rear bearing cover is connected with the transmission end bearing and the base at the same time and is arranged on one side of the base far away from the accommodating cavity, and a plurality of first sealing grooves are formed in the rear bearing cover at intervals; The transmission seal ring is connected with the transmission end bearing, the transmission shaft and the rear bearing cover simultaneously, the transmission seal ring is arranged on one side, far away from the accommodating cavity, of the transmission end bearing, a plurality of first step surfaces are arranged on the transmission seal ring, the outer diameter of each first step surface is gradually increased from one end, close to the accommodating cavity, of the transmission seal ring to the other end, and the rear bearing cover is arranged in a matched mode. Preferably, the stand includes: the shell is connected with the transmission end cooling component, the accommodating cavity is arranged on the shell, and a first cooling channel is arranged on one side of the accommodating cavity on the shell; The inner end cover is simultaneously connected with the shell and the positioning end cooling assembly; The front end cover is connected with the shell and the positioning end cooling assembly simultaneously, the front end cover is arranged on one side, far away from the accommodating cavity, of the inner end cover, a second cooling channel is formed between the front end cover and the inner end cover, the second cooling channel is communicated with the first cooling channel and is jointly formed with the first cooling channel, and an air inlet of the cooling channel is arranged on the front end cover. Preferably, the driving end cooling assembly further comprises: The back auxiliary fan set up in hold the intrac