Rotary air seal structure for internal circulation of two-pole compact high-speed motor

Abstract

The utility model relates to a rotary air seal structure for internal circulation of a dipolar compact high-speed motor. The rotary air seal structure comprises a base, a motor stator, a motor rotor, axial fan blades, an internal fan and an internal circulation air path, the motor stator is fixedly installed in the machine base. The motor rotor is rotatably installed in the machine base and located in the axial center channel of the motor stator. The axial flow fan blade is fixedly connected with a rotating shaft of the motor rotor through a connecting piece, the axial flow fan blade is close to one end of the motor stator, and a gap between the motor stator and the motor rotor is axially aligned with the axial flow fan blade; an air guide channel is arranged in the inner fan, and the connecting piece is fixedly arranged at one end of the inner fan close to the motor rotor. One-way axial flow fan blades are additionally arranged on the rotating shaft, so that one-way air flow is formed, local small circulation caused by gap air seal formed between the fan and the coil in the rotor is thoroughly eliminated, and the internal circulation air path structure is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, and specifically relates to a kind of rotary gas seal structure for two-pole compact high-speed motor internal circulation. BACKGROUND

[0002] At present, an industry proposes a kind of two-pole compact high-speed motor heat dissipation structure using the gap ventilation between motor stator and motor rotor, and the heat dissipation structure type is axial ventilation heat dissipation, and a small gap is left between coil end and the rotating position of rotor inner fan to realize gas seal effect, but actual use still exists local gas small circulation and produces air leakage phenomenon, which affects gas seal effect. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of rotary gas seal structure for two-pole compact high-speed motor internal circulation, solve the technical problems such as the partial gas small circulation of motor internal gas seal structure and affect gas seal effect.

[0004] To solve the above problems, the technical scheme of the utility model is as follows: a kind of rotary gas seal structure for two-pole compact high-speed motor internal circulation, comprising:

[0005] Base;

[0006] Motor stator, fixedly installed in base;

[0007] Motor rotor, rotationally installed in base, and the motor rotor is located in the axial center passage of motor stator;

[0008] Axial fan blade, fixedly connected with the rotating shaft of motor rotor by connecting piece, and the axial fan blade is close to one end of motor stator, and the gap between motor stator and motor rotor is axially aligned with axial fan blade;

[0009] Inner fan, arranged on the side wall of rotating shaft; inner fan has air guide channel, and air guide channel is one part of internal circulation air passage, and connecting piece is fixedly arranged on one end of inner fan close to motor rotor;

[0010] Internal circulation air passage, located in base, the gap is first axial air duct, and first axial air duct is one part of internal circulation air passage in base, and second axial air duct, which constitutes internal circulation air passage in base, is further provided between first axial air duct and inner side wall of base, and first axial air duct, air guide channel, second axial air duct and the cavity located at both ends of motor stator in base constitute internal circulation air passage.

[0011] Optionally, inner fan is arranged on the side wall of rotating shaft, and inner fan has air guide channel, and air guide channel is one part of internal circulation air passage, and connecting piece is fixedly arranged on one end of inner fan close to motor rotor.

[0012] Optionally, the part of the coil of the motor stator near the gap opening is wound with an insulating seal.

[0013] Optionally, an insulating seal ring is arranged on the coil of the motor stator, and the insulating seal ring is adjacent to the upper and lower axial flow fan blades.

[0014] Optionally, a plurality of axial through holes are formed in the yoke of the motor stator, and the axial through holes are the second axial air ducts.

[0015] Optionally, a screw is arranged in a part of the axial through holes, and nuts are threadedly arranged at both ends of the screw to press the stator lamination.

[0016] Optionally, a plurality of axial through holes are formed in the inner side wall of the motor stator, and the axial through holes and the gap form the first axial air duct.

[0017] Compared with the prior art, the utility model has the beneficial effects of:

[0018] The utility model discloses a rotating gas seal structure is arranged in the gap between the inner fan and the coil of the motor rotor, and the rotating gas seal structure is arranged on the motor stator. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic diagram of the motor inside in the embodiment;

[0020] Figure 2 It is the structure schematic diagram of the rotating gas seal structure in the embodiment;

[0021] Figure 3 It is the installation schematic diagram of the screw in the embodiment;

[0022] Figure 4 It is the position relation diagram of the motor stator and the motor rotor in the embodiment.

[0023] The figure mark: 1, the machine base;2, the motor stator;21, the coil;22, the insulating seal;23, the insulating seal ring;24, the axial through hole;25, the stator slot;3, the motor rotor;31, the rotating shaft;4, the axial flow fan blade;41, the connecting piece;5, the inner fan;51, the air guide channel;6, the screw;61, the nut;7, the gap. DETAILED DESCRIPTION

[0024] The utility model will be described in further detail below in combination with the drawings and the embodiment.

[0025] Example: Figures 1-4 As shown, this embodiment provides a rotary air seal structure for internal circulation in a two-pole compact high-speed motor, including a base 1, a motor stator 2, a motor rotor 3, axial fan blades 4, an internal fan 5, and an internal circulation air passage; the motor stator 2 is fixedly installed inside the base 1; the motor rotor 3 is rotatably installed inside the base 1, and the motor rotor 3 is located in the axial central channel of the motor stator 2; the axial fan blades 4 are fixedly connected to the rotating shaft 31 of the motor rotor 3 through a connector 41, the axial fan blades 4 are close to one end of the motor stator 2, and the gap 7 between the motor stator 2 and the motor rotor 3 is axially aligned with the axial fan blades 4; the internal circulation air passage... The fan 5 is mounted on the side wall of the rotating shaft 31; the inner fan 5 has an air guide channel 51, which is part of the inner circulation air path, and the connector 41 is fixedly mounted on the inner fan 5 at one end near the motor rotor 3; the inner circulation air path is located inside the base 1, and the gap 7 is the first axial air duct, which is part of the inner circulation air path of the base 1. There is also a second axial air duct between the first axial air duct and the inner side wall of the base 1, which constitutes the inner circulation air path of the base 1. The first axial air duct, the air guide channel 51, the second axial air duct, and the cavities located at both ends of the motor stator 2 inside the base 1 constitute the inner circulation air path.

[0026] With the above configuration, the motor in this embodiment utilizes the gap 7 between the motor stator 2 and the motor rotor 3 for axial ventilation and heat dissipation. An internal fan 5 drives the gas inside the base 1 to circulate along the internal circulation airflow path. By adding unidirectional axial fan blades 4 to the rotating shaft 31, a unidirectional airflow is formed, completely eliminating the localized small circulation caused by the air seal formed between the internal fan 5 and the coil 21, further improving its internal circulation airflow structure. During rotor rotation, the axial fan blades 4 drive the gas to flow unidirectionally, achieving a rotational air seal, solving the problems of air leakage and localized small circulation in the gap 7, and ensuring that ventilation at the gap 7 achieves internal circulation along the path. Optionally, the connecting member 41 is an air guide duct.

[0027] In a rotary gas seal structure for internal circulation of a two-pole compact high-speed motor according to this embodiment, an insulating sealant 22 is wound around the portion of the coil 21 of the motor stator 2 near the opening of the gap 7. By providing the insulating sealant 22, the coil 21 is sealed, preventing gas passing through the gap 7 from flowing out of the coil 21 and affecting the internal circulation effect.

[0028] In the rotating gas seal structure for the internal circulation of the two-pole compact high-speed motor of the embodiment, an insulating sealing ring 23 is arranged on the coil 21 of the motor stator 2, and the insulating sealing ring 23 is adjacent to the upper and lower axial flow fan blades 4. The insulating sealing ring 23 and the axial flow fan blades 4 make the gas passing through the gap 7 pass through the axial flow fan blades 4, play a guiding and collecting role for the gas, and ensure the internal circulation effect. Optionally, the insulating sealing ring 22 is closer to the electronic stator end than the insulating sealing ring 23. Optionally, the axial outer end of the insulating sealing ring 22 is in sealing contact with the axial inner end of the insulating sealing ring 23, so as to avoid the gas passing through the gap 7 from flowing out of the coil 21 gap and affecting the internal circulation effect.

[0029] In the rotating gas seal structure for the internal circulation of the two-pole compact high-speed motor of the embodiment, a plurality of axial through axial ventilation holes 24 are arranged in the yoke of the motor stator 2, and the axial ventilation holes 24 are the second axial air duct. The axial ventilation holes 24 are simple in structure, cooperate with the inner cavity of the motor base 1 and the first axial air duct to form an internal circulation air path, and ensure the internal circulation heat dissipation effect. Specifically, the plurality of axial ventilation holes 24 are uniformly distributed in the yoke of the motor stator 2.

[0030] In the rotating gas seal structure for the internal circulation of the two-pole compact high-speed motor of the embodiment, a plurality of axial ventilation holes 24 are arranged in the yoke of the motor stator 2, and the axial ventilation holes 24 are the second axial air duct. The axial ventilation holes 24 are simple in structure, cooperate with the inner cavity of the motor base 1 and the first axial air duct to form an internal circulation air path, and ensure the internal circulation heat dissipation effect. Specifically, the plurality of axial ventilation holes 24 are uniformly distributed in the yoke of the motor stator 2.

[0031] In the rotating gas seal structure for the internal circulation of the two-pole compact high-speed motor of the embodiment, a plurality of axial through axial ventilation holes 24 are arranged in the yoke of the motor stator 2, and the axial ventilation holes 24 are the second axial air duct. The axial ventilation holes 24 are simple in structure, cooperate with the inner cavity of the motor base 1 and the first axial air duct to form an internal circulation air path, and ensure the internal circulation heat dissipation effect. Specifically, the plurality of axial ventilation holes 24 are uniformly distributed in the yoke of the motor stator 2.

Claims

1. A rotating gas seal structure for internal circulation in a compact high speed motor of the two-pole type, characterized in that, It includes: The base (1); Motor stator (2), fixedly installed in the base (1); Motor rotor (3), rotatably mounted in the base (1), motor rotor (3) is located in the axial center channel of motor stator (2); Axial fan blades (4), fixedly connected with the rotating shaft (31) of motor rotor (3) through connecting piece (41), axial fan blades (4) are close to one end of motor stator (2), the gap (7) between motor stator (2) and motor rotor (3) is axially aligned with axial fan blades (4); Inner fan (5), provided on the side wall of rotating shaft (31); Inner fan (5) has a wind guide channel (51) therein, and connecting piece (41) is fixedly provided on one end of inner fan (5) close to motor rotor (3); The inner circulating air path is located in the base (1), the gap (7) is a first axial air duct, and a second axial air duct constituting the inner circulating air path of the base (1) is further provided between the first axial air duct and the inner side wall of the base (1), the first axial air duct, the wind guide channel (51), the second axial air duct, and the cavities located at both ends of the motor stator (2) in the base (1) constitute the inner circulating air path.

2. A rotating gas seal structure for internal circulation of a compact high speed electric machine according to claim 1, characterized in that, The part of the coil (21) of the motor stator (2) close to the opening of the gap (7) is wound with an insulating sealing element (22).

3. A rotating gas seal structure for internal circulation of a compact high speed electric machine according to claim 1, characterized in that, An insulating sealing ring (23) is provided on the coil (21) of the motor stator (2), and the insulating sealing ring (23) is adjacent to the axial fan blades (4) above and below.

4. A rotating gas seal structure for internal circulation of a compact high speed electric machine according to claim 1, characterized in that, A plurality of axial ventilation holes (24) are formed in the yoke portion of the motor stator (2), and the axial ventilation holes (24) are the second axial air duct.

5. A rotating gas seal structure for internal circulation of a compact high speed electric machine according to claim 4, characterized in that, A plurality of axial ventilation holes (24) are formed in the yoke portion of the motor stator (2), and the axial ventilation holes (24) are the second axial air duct.

6. A rotating gas seal structure for internal circulation of a compact high speed electric machine according to claim 1, characterized in that, A plurality of axial ventilation holes (24) are formed in the yoke portion of the motor stator (2), and the axial ventilation holes (24) are the second axial air duct. A plurality of axial ventilation holes (24) are formed in the yoke portion of the motor stator (2), and the axial ventilation holes (24) are the second axial air duct. A plurality of axial ventilation holes (24) are formed in the yoke portion of the motor stator (2), and the axial ventilation holes (24) are the second axial air duct.

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