A strong air cooling path structure for explosion-proof motors

Abstract

The present invention discloses a strong wind cooling air path structure for an explosion-proof motor, which solves the problem of how to achieve a better cooling effect for the motor; a rectangular air duct is arranged on the top of the explosion-proof motor base shell, and a front air outlet channel and a rear air outlet channel are respectively arranged at the front and rear of the explosion-proof motor base shell; a wind blocking plate is arranged in the front air outlet channel and in the rear air outlet channel; the cooling air enters from the middle of the rectangular air duct and is divided into two paths to enter the motor driving end and the non-driving end respectively, and the cooling air then enters the axial channels of the stator and the rotor from both ends of the motor, and then enters the front air outlet channel and the rear air outlet channel through the radial channels of the stator and the rotor and the inner cavity of the shell, and finally leaves the motor after passing through the wind blocking plate; the present invention has a simple structure and good cooling effect, and at the same time, a partition is arranged at the air outlet to increase the wind pressure inside the motor and ensure that the internal pressure of the motor is in a detectable state.

Description

Technical Field

[0001] The present invention relates to an explosion-proof motor, and in particular to a strong wind cooling air path structure of the explosion-proof motor. Background Art

[0002] Some explosion-proof motors require that the air pressure inside the motor be a large positive pressure, that is, the air pressure inside the motor is greater than the air pressure outside the motor, in order to achieve better explosion-proof effect; the structure of these motors requires that the cooling fan be installed in the middle of the motor, and the cooling air should be blown in from the middle of the motor. After the cooling air enters the middle of the stator and rotor, it moves to both ends of the motor and finally blows out from the air outlets at both ends of the motor housing; this air path setting structure can achieve better cooling effect for the stator core, but the cooling effect for the winding ends is poor; for the motor structure, the stator core is connected to the base, so the temperature rise is small, while the motor winding ends are dissipated by air, and the temperature rise is higher. The above-mentioned air path structure has poor cooling effect on the stator winding ends and the rotor winding ends; for explosion-proof motors with strong air cooling, how to achieve better cooling effect for the motor and make the positive pressure inside the motor adjustable has become a problem that needs to be solved on site. Summary of the Invention

[0003] The present invention provides a strong air cooling air path structure for an explosion-proof motor, which solves the technical problem of how to achieve a better cooling effect for the motor and make the positive pressure inside the motor controllable.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is as follows: a rectangular air duct is arranged on the top of the explosion-proof motor base housing, and a front air outlet channel and a rear air outlet channel are respectively arranged at the front and rear of the explosion-proof motor base housing; wind blocking plates are arranged in the front air outlet channel and the rear air outlet channel; cooling air enters from the middle of the rectangular air duct and is divided into two paths to enter the motor drive end and non-drive end respectively, and the cooling air then enters the axial channels of the stator and rotor from both ends of the motor, and then enters the front air outlet channel and the rear air outlet channel through the radial channels of the stator and rotor and the inner cavity of the housing, and finally leaves the motor after passing through the wind blocking plate.

[0006] A strong wind cooling air path structure for an explosion-proof motor includes a motor base housing, a motor stator and a motor rotor are arranged in the motor base housing, a stator radial ventilation duct is arranged on the motor stator, a rotor axial ventilation duct and a rotor radial ventilation duct are respectively arranged on the motor rotor, a stator-rotor air gap is arranged between the motor stator and the rotor, an annular cavity is arranged between the motor base housing and the stator, a motor drive end air inlet is arranged on the left end top surface of the motor base housing, a motor non-drive end air inlet is arranged on the right end top surface of the motor base housing, and a A rectangular air inlet is provided, a front air outlet is provided on the front side of the motor base housing, and a rear air outlet is provided on the rear side of the motor base housing; the left end of the rectangular air inlet is connected to the air inlet of the motor drive end, and the right end of the rectangular air inlet is connected to the air inlet of the motor non-drive end, and the front air outlet and the rear air outlet are both connected to the annular cavity; a cooling air inlet is provided in the middle of the top of the rectangular air inlet, and a cooling fan is connected to the cooling air inlet; a rear air baffle is provided in the rear air outlet, and a front air baffle is provided in the front air outlet.

[0007] An air guide cone is provided in the rectangular air duct directly below the cooling air inlet, and the air guide cone divides the cooling air input from the cooling air inlet into two paths, the left and the right.

[0008] The present invention has a simple structure and good cooling effect. At the same time, a partition is provided at the air outlet to increase the wind pressure inside the motor and ensure that the internal pressure of the motor is in a detectable state. After the fan blows the cooling air into the motor, it is divided into two paths, which are distributed to cool the windings at both ends, enter the air outlet cavity through the ventilation duct in the middle of the stator and rotor iron cores, and flow out of the motor through the air outlet duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention;

[0010] Figure 2 It is a schematic structural diagram of the present invention in the right viewing direction. DETAILED DESCRIPTION

[0011] The present invention is described in detail below with reference to the accompanying drawings:

[0012] A strong wind cooling air path structure for an explosion-proof motor, comprising a motor base housing 1, a motor stator and a motor rotor arranged in the motor base housing 1, a stator radial ventilation duct 9 arranged on the motor stator, a rotor axial ventilation duct 11 and a rotor radial ventilation duct 12 respectively arranged on the motor rotor, a stator-rotor air gap 8 arranged between the motor stator and the rotor, an annular cavity 10 arranged between the motor base housing and the stator, a motor drive end air inlet 5 arranged on the left end top surface of the motor base housing 1, a motor non-drive end air inlet 6 arranged on the right end top surface of the motor base housing 1, and a rectangular inlet 12 arranged on the top surface of the motor base housing 1. The air duct 2 is provided with a front air outlet duct 13 on the front side surface of the motor base housing 1, and a rear air outlet duct 14 is provided on the rear side surface of the motor base housing 1; the left end of the rectangular air inlet duct 2 is connected with the air inlet 5 at the driving end of the motor, and the right end of the rectangular air inlet duct 2 is connected with the air inlet 6 at the non-driving end of the motor, and the front air outlet duct 13 and the rear air outlet duct 14 are both connected with the annular cavity 10; in the middle of the top end of the rectangular air inlet duct 2, a cooling air inlet 3 is provided, and a cooling fan 4 is connected to the cooling air inlet 3; a rear air baffle 15 is provided in the rear air outlet duct 14, and a front air baffle is provided in the front air outlet duct 13.

[0013] An air guide cone 7 is provided in the rectangular air duct 2 directly below the cooling air inlet 3 , and the air guide cone 7 divides the cooling air input from the cooling air inlet 3 into two paths, the left and the right.

[0014] The cooling air generated by the cooling fan 4 enters the rectangular air inlet 2 through the cooling air inlet 3, and the air guide cone 7 divides the cooling air into two winds, the left and the right. The cooling air diverted to the left enters the motor housing through the motor drive end air inlet 5. Part of the cooling air enters the stator-rotor air gap 8, then turns to pass through the stator radial ventilation duct 9 and enters the annular cavity 10; the other part of the cooling air enters the rotor axial ventilation duct 11, and after turning, passes through the rotor radial ventilation duct in sequence. The cooling air flows through the annular cavity 10, the stator-rotor air gap 8 and the stator radial ventilation duct 9, and enters the annular cavity 10; the cooling air collected in the annular cavity 10 either enters the rear air outlet duct 14, is redirected twice by the rear air baffle 15, and finally leaves the motor through the air outlet 16, or enters the front air outlet duct 13, is redirected twice by the front air baffle, and finally leaves the motor through the air outlet; the wind pressure inside the motor can be adjusted by adjusting the height of the air baffle to meet the positive pressure requirement inside the motor.

Claims

1. A strong wind cooling air path structure for an explosion-proof motor, comprising a motor base housing (1), a motor stator and a motor rotor arranged in the motor base housing (1), a stator radial ventilation duct (9) arranged on the motor stator, a rotor axial ventilation duct (11) and a rotor radial ventilation duct (12) respectively arranged on the motor rotor, a stator-rotor air gap (8) arranged between the motor stator and the rotor, an annular cavity (10) arranged between the motor base housing and the stator, a motor drive end air inlet (5) arranged on the left end top surface of the motor base housing (1), and a motor non-drive end air inlet (6) arranged on the right end top surface of the motor base housing (1), characterized in that: A rectangular air inlet (2) is provided on the top surface of the motor base housing (1), a front air outlet (13) is provided on the front side surface of the motor base housing (1), and a rear air outlet (14) is provided on the rear side surface of the motor base housing (1); the left end of the rectangular air inlet (2) is connected to the motor drive end air inlet (5), the right end of the rectangular air inlet (2) is connected to the motor non-drive end air inlet (6), and the front air outlet (13) and the rear air outlet (14) are both connected to the annular cavity (10); a cooling air inlet (3) is provided in the middle of the top of the rectangular air inlet (2), and a cooling fan (4) is connected to the cooling air inlet (3); a rear air baffle (15) is provided in the rear air outlet (14), and a front air baffle is provided in the front air outlet (13).

2. The strong air cooling duct structure of an explosion-proof motor according to claim 1, characterized in that: An air guide cone (7) is provided in the rectangular air inlet duct (2) directly below the cooling air inlet (3). The air guide cone (7) divides the cooling air input from the cooling air inlet (3) into two paths, the left and the right.

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