Closed motor provided with internal and external cooling air paths

Abstract

The invention relates to the field of motors, in particular to a closed motor with internal and external cooling air paths, which comprises a shell of which the inner wall is uniformly provided with a plurality of magnetic poles, an end cover fixed at one end of the shell, and a rotor of which the two ends respectively penetrate through and are rotationally connected to the centers of the shell and the end cover, each air channel corresponds to a gap between two adjacent magnetic poles, the air channels are communicated with the gaps at the ends away from the end cover, the end cover is provided with a rotating channel communicated with the multiple air channels, and fan blades I are fixed to the position, close to the end cover, of the rotor. And a cavity tube is sleeved on the shell. A plurality of cooling fins are evenly arranged on the outer side of the cavity pipe. Two side lug pipes are symmetrically arranged on the cavity pipe, communicating pipes are arranged at the two ends of the end cover, the two communicating pipes are in butt joint communication with the two side lug pipes respectively, inner cavity plates are fixed to the ends, away from the side lug pipes, of the two communicating pipes, and spiral frames are rotationally arranged in the two communicating pipes. The motor can effectively dissipate heat, and the temperature rise of the motor is prevented from being too high.

Description

Technical Field

[0001] This invention relates to the field of electric motors, and in particular to a closed-type electric motor with internal and external cooling air passages. Background Technology

[0002] Permanent magnet motors, as a type of special motor, have significant advantages when used in passenger transport vehicles. Compared with the copper bar structure of asynchronous motor rotors, permanent magnet motor rotors use permanent magnets. During operation, there is no copper loss because there is no current in the bars. The motor has high efficiency and obvious energy-saving and consumption-reducing advantages.

[0003] The temperature rise of the stator determines the overall temperature rise of the permanent magnet motor, which in turn affects its reliable operation. When designing the stator cooling airflow for a permanent magnet motor, both fully enclosed and open structures can be used. If a high protection level is required, a fully enclosed structure should be adopted, such as... Figure 1 As shown, since there is no separate cooling air duct in the motor, the frame and the end covers at both ends form a sealed cavity, which effectively isolates the internal components of the motor from the external atmosphere. Dust, moisture and foreign objects in the external atmosphere cannot enter the motor, resulting in a high level of protection. However, the heat inside the motor cannot be effectively conducted out, and the increase in motor temperature affects the reliable operation of the motor. Summary of the Invention

[0004] The purpose of this invention is to provide a closed motor with internal and external cooling air passages, which can effectively dissipate heat and prevent the motor temperature from rising too high.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A closed motor with internal and external cooling air passages includes a shell with multiple magnetic poles evenly distributed on its inner wall, an end cover fixed to one end of the shell, and a rotor rotatably connected to the center of the shell and the end cover respectively through both ends. The shell has multiple air passages axially distributed, each air passage corresponding to the gap between two adjacent magnetic poles, and the air passage and the gap are connected at the end away from the end cover. The end cover has a rotary channel that communicates with the multiple air passages, and a fan blade I is fixed to the rotor near the end cover.

[0007] The outer shell is fitted with a cavity tube.

[0008] Multiple heat sinks are evenly distributed on the outer side of the cavity tube.

[0009] The cavity tube is symmetrically provided with two side ear tubes, and both ends of the end cap are provided with connecting tubes. The two connecting tubes are respectively connected to the two side ear tubes. The ends of the two connecting tubes away from the side ear tubes are fixed with inner cavity plates, and the two connecting tubes are each equipped with a rotating screw.

[0010] A spindle rotates in the middle of the inner cavity plate. The spindle is inserted into the central shaft end of the rotor and simultaneously drives two screw frames.

[0011] The core shaft is provided with fan blades II.

[0012] A plurality of long holes are provided through the inner cavity plate.

[0013] The inner cavity plate is provided with a protective cover.

[0014] The lower end of the two side ear tubes is fixed with a U-shaped base, the U-shaped base is rotatably provided with two fan blades III, and the core shaft synchronously drives the two fan blades III.

[0015] One end of the slope plate is rotatably provided on the U-shaped base, the other end of the slope plate is rotatably provided with a linkage plate, the other end of the linkage plate is rotatably provided with a long hole plate, and the conveying end of the rotor shaft is fixed with an eccentric wheel which slides in the long hole plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 And Figure 2 is a schematic diagram of the overall structure of a closed motor provided with internal and external cooling air paths;

[0017] Figure 3 is a schematic diagram of the local structure of a closed motor provided with internal and external cooling air paths;

[0018] Figure 4 is a schematic diagram of the structure of the outer shell;

[0019] Figure 5 And Figure 6 is a schematic diagram of the structure of the end cover;

[0020] Figure 7 is a schematic diagram of the structure of the rotor;

[0021] Figure 8 is a schematic diagram of the structure of the cavity tube;

[0022] Figure 9 is a schematic diagram of the structure of the core shaft;

[0023] Figure 10 is a schematic diagram of the structure of the slope plate.

[0024] In the drawings:

[0025] The outer shell 101; the magnetic pole 102; the air duct 103; the end cover 104; the rotary duct 105; the communication tube 106; the inner cavity plate 107; the long hole 108;

[0026] The rotor 201; the fan blade I 202; the eccentric wheel 203;

[0027] The cavity tube 301; the side ear tube 302; the U-shaped base 303;

[0028] The spiral frame 401; the core shaft 402; the fan blade II 403; the fan blade III 404;

[0029] Ramp plate 501; linkage plate 502; long hole plate 503. DETAILED DESCRIPTION

[0030] As Figures 1-10 shown:

[0031] A closed motor with internal and external cooling air path, comprising a shell 101, a magnetic pole 102, an air duct 103, an end cover 104, a rotor 201 and a fan blade I 202; the shell 101 is uniformly provided with a plurality of magnetic poles 102 on the inner wall, the end cover 104 is fixed at one end of the shell 101, the two ends of the rotor 201 are respectively penetrated and connected to the center of the shell 101 and the end cover 104 in rotation, and the shell 101 is provided with a plurality of air ducts 103 in the axial direction, each air duct 103 corresponds to the gap between the adjacent two magnetic poles 102, and the air duct 103 and the gap are communicated at the end away from the end cover 104, the end cover 104 is provided with a rotary channel 105 communicated with the plurality of air ducts 103, and the rotor 201 is fixed with a fan blade I 202 close to the end cover 104.

[0032] When the motor is in use, the rotor 201 rotates at high speed in the shell 101, and drives the fan blade I 202 to rotate, the rotating fan blade I 202 will blow air to the gap between the rotor 201 and the inner wall of the shell 101, so that the air flows quickly from the gap between the plurality of magnetic poles 102 to the direction away from the end cover 104, and when flowing to the end of the shell 101, enters the plurality of air ducts 103, and then flows along the air duct 103 to the end cover 104, and after flowing into the rotary channel 105, enters the end cover 104, and returns to the fan blade I 202 again, and then is blown by the fan blade I 202 to the gap between the rotor 201 and the inner wall of the shell 101 again, forming a closed circulation of air in the motor, the circulating air will carry the heat on the rotor 201 into the air duct 103, and then be absorbed by the shell 101 outside the air duct 103, and the shell 101 will be cooled by the environment outside the shell 101, thereby effectively reducing the temperature of the rotor 201.

[0033] Each air duct 103 is arc-shaped, and the arc length is relatively long, the shell 101 wall outside the air duct 103 is thin, which is convenient for heat dissipation of the air in the air duct 103, thereby improving the overall heat dissipation efficiency.

[0034] As Figures 1-10 shown:

[0035] The cavity tube 301 is sleeved on the shell 101.

[0036] Through the setting of the cavity tube 301, there is an annular cavity between the cavity tube 301 and the shell 101, and by adding cooling liquid in the annular cavity, the shell 101 can be better cooled, thereby improving the overall heat dissipation efficiency of the motor.

[0037] Further:

[0038] The outer side of the cavity tube 301 is uniformly provided with a plurality of cooling fins.

[0039] Through the setting of the plurality of cooling fins, the cooling liquid in the cavity tube 301 is better cooled.

[0040] As Figures 1-10 shown:

[0041] Two side ear tubes 302 are symmetrically arranged on the cavity tube 301, two communication tubes 106 are arranged at both ends of the end cover 104, two communication tubes 106 are respectively connected with two side ear tubes 302, the inner cavity plate 107 is fixed at the end of the two communication tubes 106 away from the side ear tube 302, and two spiral frames 401 are respectively rotated in the two communication tubes 106.

[0042] Through the setting of the two side ear tubes 302, the two communication tubes 106 and the inner cavity of the inner cavity plate 107, a circulating channel of the cooling liquid is formed, by driving the two spiral frames 401 to rotate, the rotating two spiral frames 401 will respectively push the cooling liquid to flow in the two communication tubes 106, and then make the cooling liquid circulate in the circulating channel, and then further improve the heat dissipation efficiency of the cooling liquid to the cavity tube 301.

[0043] As Figures 1-10 shown:

[0044] The mandrel 402 is rotated in the middle part of the inner cavity plate 107, the mandrel 402 is inserted into the middle shaft end of the rotor 201, and the mandrel 402 simultaneously drives the two spiral frames 401.

[0045] When the motor rotates, the rotor 201 simultaneously drives the mandrel 402 to rotate, and the mandrel 402 simultaneously drives the two spiral frames 401 to rotate.

[0046] As Figures 1-10 shown:

[0047] The mandrel 402 is provided with fan blades II 403.

[0048] The rotating mandrel 402 will simultaneously drive the fan blades II 403 to rotate at high speed, so as to blow air to the inner cavity plate 107, so as to form heat dissipation to the inner cavity plate 107, and then form heat dissipation to the cooling liquid in the inner cavity of the inner cavity plate 107, and then further improve the heat dissipation efficiency of the cooling liquid to the cavity tube 301.

[0049] As Figures 1-10 shown:

[0050] A plurality of long holes 108 are provided on the inner cavity plate 107.

[0051] By setting multiple elongated holes 108, multiple transversely arranged thin-walled pipes are formed in the middle of the inner cavity plate 107. When the fan blade II 403 blows air onto the inner cavity plate 107, the flowing air will better dissipate heat from the thin-walled pipes, thereby better dissipating heat from the coolant inside the inner cavity plate 107, and further improving the heat dissipation efficiency of the coolant on the cavity tube 301.

[0052] like Figures 1-10 As shown:

[0053] The inner cavity plate 107 is provided with a protective cover.

[0054] The spindle 402 and the transmission parts of the two screw carriers 401 are protected by a protective cover.

[0055] like Figures 1-10 As shown:

[0056] The U-shaped base 303 is fixed to the lower end of the two side ear tubes 302. Both fan blades Ⅲ 404 rotate on the U-shaped base 303, and the spindle 402 synchronously drives the two fan blades Ⅲ 404.

[0057] The rotating spindle 402 simultaneously drives the two fan blades Ⅲ 404 to rotate at high speed inside the U-shaped base 303, thereby blowing air to the lower wall of the cavity tube 301 inside the U-shaped base 303 to dissipate heat, further improving the heat dissipation efficiency of the coolant inside the cavity tube 301.

[0058] like Figures 1-10 As shown:

[0059] One end of the ramp plate 501 rotates on the U-shaped base 303, the connecting plate 502 rotates on the other end of the ramp plate 501, the elongated plate 503 rotates on the other end of the connecting plate 502, the eccentric wheel 203 is fixed on the output end of the central shaft of the rotor 201, and the eccentric wheel 203 slides inside the elongated plate 503.

[0060] As the eccentric wheel 203 rotates eccentrically, it will reciprocate the elongated perforated plate 503, causing the elongated perforated plate 503 to move up and down repeatedly. This, in turn, drives the inclined plate 501 to rotate up and down repeatedly through the connecting plate 502, thereby guiding the air blown out by the two fan blades Ⅲ 404 to be better blown towards the lower wall of the cavity tube 301 inside the U-shaped base 303, further improving the heat dissipation efficiency of the coolant inside the cavity tube 301.

Claims

1. A closed-type motor with internal and external cooling air passages, characterized in that: The system includes a housing (101) with a plurality of magnetic poles (102) evenly distributed on its inner wall, and an end cap (104) fixed to one end of the housing (101). A rotor (201) is rotatably connected to the center of the outer shell (101) and the end cover (104) at both ends. The outer shell (101) has multiple air passages (103) axially arranged. Each air passage (103) corresponds to the gap between two adjacent magnetic poles (102), and the air passage (103) and the gap are connected at the end away from the end cover (104). The end cover (104) has a rotary track (105) connected to the multiple air passages (103). A fan blade I (202) is fixed on the rotor (201) near the end cover (104).

2. A closed-type motor with internal and external cooling air passages according to claim 1, characterized in that: A cavity tube (301) is fitted onto the outer shell (101).

3. A closed-type motor with internal and external cooling air passages according to claim 2, characterized in that: Multiple heat sinks are evenly distributed on the outer side of the cavity tube (301).

4. A closed-type motor with internal and external cooling air passages according to claim 2, characterized in that: Two lateral ear tubes (302) are symmetrically arranged on the cavity tube (301). Both ends of the end cap (104) are provided with connecting tubes (106). The two connecting tubes (106) are respectively connected to the two lateral ear tubes (302). An inner cavity plate (107) is fixed at the end of the two connecting tubes (106) away from the lateral ear tubes (302). A screw frame (401) rotates inside the two connecting tubes (106).

5. A closed-type motor with internal and external cooling air passages according to claim 4, characterized in that: The inner cavity plate (107) has a spindle (402) rotating in the middle. The spindle (402) is inserted into the central shaft end of the rotor (201). The spindle (402) simultaneously drives the two screw carriers (401).

6. A closed-type motor with internal and external cooling air passages according to claim 5, characterized in that: The spindle (402) is provided with fan blades II (403).

7. A closed-type motor with internal and external cooling air passages according to claim 6, characterized in that: The inner cavity plate (107) is provided with multiple elongated holes (108).

8. A closed-type motor with internal and external cooling air passages according to claim 7, characterized in that: The inner cavity plate (107) is provided with a protective cover.

9. A closed-type motor with internal and external cooling air passages according to claim 6, characterized in that: The lower ends of the two side ear tubes (302) are fixed with U-shaped bases (303), and two fan blades III (404) rotate on the U-shaped bases (303). The spindle (402) synchronously drives the two fan blades III (404).

10. A closed-type motor with internal and external cooling air passages according to claim 9, characterized in that: One end of the U-shaped base (303) is rotated on the ramp plate (501), and the other end of the ramp plate (501) is rotated on the connecting plate (502). The other end of the connecting plate (502) is rotated on the elongated perforated plate (503). An eccentric wheel (203) is fixed at the output end of the central shaft of the rotor (201), and the eccentric wheel (203) slides in the elongated perforated plate (503).

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