Fan assembly for an electric motor and electric motor comprising the same

Abstract

A fan assembly (10) for an electric motor (15) includes a) a fan 80 including a fan housing (105) surrounding a plurality of fan blades (115) and a fan motor (110), b) a mounting bracket (85) extending in a transverse direction Y, the transverse direction Y being orthogonal to the main axis (X1) of the shaft (30) of the electric motor (15), the mounting bracket (85) including a bracket-fan interface (145) attached to an inner base (105B) of the fan housing (105), and a closure portion (70) configured to be slidably received in complementary cutouts (65) formed in flanges (50, 55) of the electric motor, c) first fixing devices (90A, 90B) for attaching the bracket-fan interface (145) to the inner base (105B) of the fan housing (105), and d) The second removable fixing device (95A, 95B, 95C) is used to attach the mounting bracket (85) to the flange (50, 55).

Description

Technical Field

[0001] This disclosure relates to a fan assembly for an electric motor and an electric motor including the fan. Background Technology

[0002] In the field of electric motors, especially those used in rail vehicles, overheating must be avoided to ensure normal operation and a long lifespan.

[0003] It is known that cooling devices circulate external fluids, such as air around the motor, in order to cool the rotor and / or stator.

[0004] In particular, some electric motors are equipped with electric fans to generate pushing or pulling airflow in the air gap and / or the ducts that pass through the rotor and / or stator.

[0005] EP21160990 discloses an electric motor including a main stator, a main rotor, a main motor shaft, and an integrated fan comprising blades that rotate about an axis coaxial with the main motor shaft. The blades are driven by an auxiliary motor associated with the fan. The auxiliary motor includes an auxiliary stator and an auxiliary rotor having an auxiliary motor shaft arranged in an extension of the main motor shaft.

[0006] If the integrated fan fails, the main motor must be completely removed from its location, especially in a vehicle, before the integrated fan can be replaced or repaired.

[0007] Therefore, the maintenance time and cost are too high. Summary of the Invention

[0008] One object of this disclosure is to provide a fan assembly for a ventilation motor that allows for easy assembly and disassembly of the fan.

[0009] Therefore, this disclosure relates to a fan assembly for an electric motor having a flange, the fan assembly comprising: a) A fan for a ventilation motor, the fan comprising a fan housing that encloses a plurality of fan blades and a fan motor configured to drive the fan blades to rotate about a fan axis. b) A mounting bracket extending laterally, the lateral direction being intended to be orthogonal to the main axis of the motor shaft, the mounting bracket comprising: The bracket-fan connector is designed to attach to the inner base of the fan housing, and The enclosed portion protrudes laterally from the bracket-fan interface and is configured to slidably receive in a complementary cutout formed in the flange. c) A first fixing device, configured for attaching the bracket-fan interface to the inner base of the fan housing, and d) A second removable fixing device configured to attach the mounting bracket to the flange.

[0010] The mounting bracket allows for easy assembly / disassembly of the fan and flange by sliding the closed portion in complementary cuts along the longitudinal direction. Since the longitudinal direction is orthogonal to the main shaft of the motor equipped with the flange, this direction can be positioned in an easily accessible orientation, for example, in the environment of a train bogie equipped with a motor, which is opposite to the direction of the motor shaft.

[0011] The closed section and the flange defining complementary cuts therein form a complete flange, allowing proper airflow.

[0012] The second fixing device allows the mounting bracket and thus the fan housing to be fixed relative to the flange, while also allowing the fan to be removed from the flange for replacement.

[0013] According to other advantageous aspects of this disclosure, the flange assembly includes one or more of the following features, individually or in any technically possible combination: - The closure includes two guide members, each configured to slidably receive in a corresponding receiving groove of a complementary cut. - The first fixing device is removable. - The second fixing device includes at least one screw designed to simultaneously receive in a transverse through-hole formed in the closed portion and a corresponding transverse threaded hole formed in the flange, the transverse holes extending parallel to the transverse direction and designed for alignment. The mounting bracket also includes a protrusion that extends laterally relative to the bracket-fan interface on the opposite side of the enclosed portion. Opposing threaded holes are provided in the protrusion in the lateral direction and are intended to align with corresponding opposing through holes extending laterally in the flange on opposite sides of complementary cuts. The second fixing device includes at least one screw designed to be received simultaneously in two opposing holes. - The second fixing device includes at least one screw designed to be received simultaneously in a longitudinal hole formed in the closure portion and a corresponding longitudinal through hole formed in the flange, the longitudinal holes extending parallel to the longitudinal direction and designed for alignment.

[0014] This disclosure also relates to an electric motor comprising a shaft extending along a main axis, a flange, and a fan assembly, the flange extending in a transverse plane perpendicular to the main axis and having a notch, and the fan assembly being a fan assembly according to any of the preceding claims.

[0015] According to other advantageous aspects of this disclosure, the electric motor includes one or more of the following features, individually or in any technically possible combination: - The fan shaft is designed to be an extension of the main shaft. - The complementary cut includes two grooves extending parallel to the lateral direction, forming a slider for closing the portion. - At least one groove has a cross-section perpendicular to the transverse direction, the surface area of ​​which is smaller near the main axis than the surface area away from the main axis. Attached Figure Description

[0016] Figure 1 This is a half-sectional view of an embodiment of a self-ventilated open traction motor equipped with a fan assembly according to the present disclosure.

[0017] Figure 2 This is a cross-sectional view of the fan assembly according to the present disclosure attached to the fan in a plane perpendicular to the fan axis.

[0018] Figure 3 This is a view of a flange configured for assembly with a fan assembly according to this disclosure.

[0019] Figure 4 yes Figure 3 A perspective view of the flange and the fan assembly attached to the fan according to this disclosure, at the beginning of its assembly.

[0020] Figure 5 yes Figure 4 A perspective view of the flange and fan assembly once assembled.

[0021] Figure 6 yes Figure 5 The components in the first plane BB ( Figure 6 A) is a cross-sectional view in a plane perpendicular to the lateral direction, and in the second plane B1B1 ( Figure 6 In section B), the cross-sectional view is taken in a plane perpendicular to the horizontal direction, where planes BB and B1B1 are located. Figure 4 As shown in the image. Detailed Implementation

[0022] This disclosure relates to a fan assembly 10 for an electric motor 15.

[0023] Electric motor 15, for example configured for equipping engines (not shown) of land, air or water vehicles, particularly railway vehicles such as trains, subways or trams.

[0024] Electric motor 15 is, for example, a traction motor.

[0025] Figure 1 This describes an exemplary embodiment of an electric motor 15 equipped with an embodiment of a fan assembly 10 according to the present disclosure.

[0026] The electric motor 15 includes a main housing 20, a main stator 25 attached to the main housing 20, a main motor shaft 30, and a main rotor 35 fixed to the main motor shaft 30.

[0027] The main motor shaft 30 extends primarily in the longitudinal direction X and can rotate relative to the main housing 20 about a main axis X1 that is parallel to the longitudinal direction X.

[0028] The main motor shaft 30 is guided to rotate around the bearing 40 mounted on the main stator 25.

[0029] The main rotor 35 surrounds the main motor shaft 30.

[0030] The main stator 25 surrounds the main rotor 35 and carries a set of coils 45.

[0031] The main housing 20 defines an internal volume within which the main rotor 35 and the main stator 25 are arranged.

[0032] The main housing 20 extends in the longitudinal direction X between the air outlet flange 50 and the air inlet flange 55.

[0033] Each of the air outlet flange 50 and the air inlet flange 55 extends in a corresponding transverse plane YZ, which is perpendicular to the longitudinal direction X.

[0034] The air inlet flange 55 includes at least one inlet bore 56.

[0035] The air outlet flange 50 includes at least one outlet through hole 60.

[0036] The motor 15 includes at least one cooling channel 57 that extends in the longitudinal direction X and forms a fluid connection between at least one inlet through-hole 56 and at least one outlet through-hole 60.

[0037] For example, at least one cooling channel 57 is arranged radially between the main stator 25 and the main housing 20.

[0038] An exemplary embodiment of the air outlet flange 50 is in Figure 3 and Figure 4 The Chinese side indicated that...

[0039] In these examples, the air outlet flange 50 includes a plurality of outlet through holes 60 distributed around the main axis X1 in the respective transverse plane YZ.

[0040] Preferably, the outlet through holes 60 are evenly distributed.

[0041] The air outlet flange 50 also includes a notch 65.

[0042] The cutout 65 is configured to receive the closed portion 70 of the fan assembly 10, as described below.

[0043] The incision 65 extends along the transverse direction Y, which is perpendicular to the longitudinal direction X.

[0044] The cut 65 is configured to receive the closed portion 70 in a sliding manner along the transverse direction Y.

[0045] The cut 65 may include two parallel grooves 75 parallel to the transverse direction Y.

[0046] The grooves 75 are spaced apart from each other in a third direction Z perpendicular to the longitudinal direction X and the transverse direction Y, and they are adjacent to the cutouts 65.

[0047] In this case, the two grooves 75 form a slider, thereby allowing the cutout 65 to slide in the lateral direction Y to receive the closed portion 70.

[0048] In one embodiment, the cross-section of any one or both of the grooves 75 varies in the lateral direction.

[0049] In a particular embodiment, the surface area of ​​the cross-section of the lower portion 75A of any of the grooves 75 is smaller than the surface area of ​​the cross-section of the upper portion 75B of the groove 75. The lower portion 75A is closer to the main axis X1 in the transverse direction Y, and the upper portion 75B is closer to the periphery 50A of the air inlet flange 50 in the transverse direction Y. Figure 3 and Figure 6 As shown.

[0050] In a particular embodiment, the lower portion 75A has a U-shaped cross-section, such as... Figure 6 As shown in Figure A.

[0051] In a particular embodiment, the cross-section of the upper part 75B is L-shaped, such as... Figure 6 As shown in B.

[0052] Because of these provisions, the closing portion 70 can be loosely inserted into the upper portion 75B. Therefore, the insertion of the closing portion 70 is easy. Once the closing portion 70 is positioned in the cutout 65, the closing portion 70 can be tightly held and precisely positioned in the longitudinal direction X by the lower portion 75A.

[0053] The fan assembly 10 includes a fan 80 for a ventilation motor 15, a mounting bracket 85 including a closed portion 70, a first fixing device 90 configured to attach the mounting bracket 85 to the fan 80, and a second removable fixing device 95A, 95B configured to attach the mounting bracket 85 to an air outlet flange 50.

[0054] The fan 80 is configured to circulate airflow 100 through at least one cooling passage 57 from at least one inlet through-hole 56 toward at least one outlet through-hole 60.

[0055] The fan 80 includes a fan housing 105 that surrounds a fan motor 110 and a plurality of fan blades 115.

[0056] The fan housing 105 extends in the longitudinal direction X between the outer base 105A and the inner base 105B.

[0057] Each of the outer base 105A and the inner base 105B extends in the corresponding transverse plane YZ.

[0058] The outer base 105A is provided with at least one outlet through hole 105C.

[0059] The fan housing 105 is provided with at least one inlet through-hole, allowing air to flow from at least one cooling passage 57 to at least one outlet through-hole 105C.

[0060] The fan motor 110 is configured to drive the fan blades 115 to rotate around the fan axis X2.

[0061] according to Figure 1 In the specific embodiment shown, the fan motor 110 includes an auxiliary stator 120 attached to the fan housing 105 and an auxiliary rotor 125 attached to the auxiliary shaft 130.

[0062] The auxiliary shaft 130 can be integrated with the fan blade 115.

[0063] The auxiliary rotor 125 is guided to rotate around the fan axis X2 via the auxiliary bearing 135.

[0064] In a particular embodiment, the auxiliary shaft 130 is coaxial with the main motor shaft 30, such as... Figure 1 As shown.

[0065] Preferably, the fan blades 115 are evenly distributed around the fan axis X2.

[0066] Mounting bracket 85 is configured to allow fan 80 to be easily installed and removed from air outlet flange 50.

[0067] Mounting bracket 85 extends in the transverse direction Y, perpendicular to the main axis X1.

[0068] Mounting bracket 85 includes bracket-fan interface 145 and enclosure 70.

[0069] The bracket-fan interface 145 is intended to be attached to the inner base 105B of the fan housing 105 via the first fixing device 90.

[0070] For this purpose, the bracket-fan interface 145 may include a central portion 145A, which is intended to be positioned to at least partially contact the inner base 105B.

[0071] The central portion 145A may have a shape similar to that of the inner base 105B in the transverse plane YZ, such as Figure 4 As shown.

[0072] The bracket-fan interface 145 may include one or more tabs 145B that project radially from the central portion 145A, such as Figure 4 As shown. Each tab 145B may be provided with a through hole 145B1, which is intended to align with the screw hole of the corresponding tab of the fan housing 105, the screw hole being configured to receive the screw after the corresponding screw 90A is inserted into the corresponding through hole 145B1.

[0073] In this case, the first fixing device 90 includes one or more screws 90A.

[0074] Alternatively, such as Figure 2 As shown, the bracket-fan interface 145 may include a peripheral portion 145C extending around a central portion 145A in a transverse plane YZ. The peripheral portion 145C may be provided with one or more screw holes 145D, which are intended to align with corresponding through holes machined in the peripheral portion of the fan housing 105, the screw holes and through holes being configured to receive corresponding screws 90B included in the first fixing device 90.

[0075] As an alternative, the bracket-fan interface 145 can be permanently attached to the fan housing 105.

[0076] The enclosed portion 70 has a bracket-fan interface 145 protruding in the transverse plane YZ along the transverse direction Y.

[0077] The closure portion 70 is configured to be slidably received in a cutout 65 formed in the air outlet flange 50.

[0078] Therefore, the closed portion 70 has a shape that is substantially complementary to the shape of the cut 65.

[0079] In other words, the closed portion 70 is configured to substantially replace the portion of the conventional outlet flange that should have been removed or has been removed, to form an air outlet flange 50 with a cutout 65.

[0080] This can be done Figure 5 This was observed in [the context].

[0081] In one embodiment, the closed portion 70 includes one or more replacement through holes 150.

[0082] Replacing through hole 150 can be done in a similar way to through hole 60.

[0083] Replacement through-hole 150 can be configured to partially or completely replace the through-hole formed in a conventional outlet flange without cutout 65.

[0084] exist Figure 4 and Figure 5 In the example, the replacement through-hole 150 is smaller than the through-hole 60 due to the extension of the fan housing 105 and the central portion 145A.

[0085] When the closed portion 70 is received in the notch 65, the closed portion 70 closes the flange 50, except for the through hole 60.

[0086] In a particular embodiment, the closed portion 70 may include two guide members 155, which extend laterally in the Y direction on both sides of the closed portion 70, such as... Figure 2 and Figure 6 As shown.

[0087] Each guide member 155 is configured to be received in a corresponding recess 75.

[0088] In particular, the guide member 155 can be configured to have a shape that complements the shape of the lower portion 75A of the corresponding groove 75, especially the U-shaped lower portion 75A.

[0089] The closure portion 70 includes one or more fixing holes 160A, 160B, 160C configured to receive a second removable fixing device.

[0090] Each transverse fixing hole 160A extends in the transverse direction Y within the closed portion 70 and is designed to align with the corresponding blind bolt transverse hole 170A of the air outlet flange 50, which can... Figure 3 This was observed in [the context].

[0091] In this case, the second fixing device includes one or more screws 95A, each configured to be received in a corresponding transverse hole 170A through a corresponding fixing hole 160A, such that the head of the screw 95A rests against the outer wall 70A of the closed portion 70.

[0092] Each relative mounting hole 160B extends in the protrusion 175 of the mounting bracket 85 along the lateral direction Y. The protrusion 175 extends on the opposite side of the closure portion 70 relative to the bracket-fan interface 145.

[0093] For example, protrusion 175 extends from the central portion 145A, such as Figure 2 and Figure 4 As shown.

[0094] The fixing hole 160B is a threaded hole designed to align with the corresponding through hole 170B of the air outlet flange 50, which extends in the transverse direction Y in the air outlet flange 50 on opposite sides of the cutout 65, as shown. Figure 3 As shown.

[0095] In this case, the second fixing device includes a screw 95B configured to be received in a relative fixing hole 160B through a corresponding relative through hole 170B, such that the head of the screw 95B rests against the periphery 50A of the air outlet flange 50.

[0096] Each longitudinal fixing hole 160C extends along the longitudinal direction X.

[0097] Each longitudinal fixing hole 160C is designed to align with a corresponding longitudinal through hole 170C in the air outlet flange 50, which extends along the longitudinal direction X in the air outlet flange 50 near its periphery 50A and close to the groove 75. Figure 3 and Figure 4 As shown.

[0098] At least one of the given fixed hole 160C and the corresponding longitudinal through hole 170C is a threaded hole.

[0099] In this case, the second fixing device includes a screw 95C, which is configured to be received simultaneously in a longitudinal fixing hole 160C and a corresponding longitudinal through hole 170C.

[0100] The fan assembly 10 described above is intended to be equipped with an air outlet flange 50. In another embodiment, the fan assembly 10 is intended to be equipped with an air inlet flange 55 in a similar manner.

Claims

1. A fan assembly (10) for an electric motor (15) having flanges (50, 55), the fan assembly (10) comprising: a) A fan (80) for a ventilation motor (15), the fan (80) including a fan housing (105) surrounding a plurality of fan blades (115) and a fan motor (110) configured to drive the fan blades (115) to rotate about a fan axis (X2). b) A mounting bracket (85) extending in a transverse direction (Y) intended to be orthogonal to the main axis (X1) of the shaft (30) of the motor (15), the mounting bracket (85) comprising: The bracket-fan interface (145) is designed to attach to the inner base (105B) of the fan housing (105), and The closure (70) protrudes laterally (Y) from the bracket-fan interface (145) and is configured to be slidably received in a complementary cutout (65) formed in the flanges (50, 55). c) The first fixing device (90A, 90B) is configured to attach the bracket-fan interface (145) to the inner base (105B) of the fan housing (105), and d) Second removable fixing device (95A, 95B, 95C), configured to attach mounting bracket (85) to flange (50, 55).

2. The fan assembly (10) of claim 1, wherein the closure portion (70) comprises two guide members (155), each configured to be slidably received in a corresponding receiving groove (75) of a complementary cutout (65).

3. The fan assembly (10) according to any of the preceding claims, wherein the first fixing device (90A, 90B) is removable.

4. The fan assembly 10 according to any one of the preceding claims, wherein the second fixing device (95A, 95B, 95C) includes at least one screw (95A) intended to be received simultaneously in a transverse through hole (160A) formed in the closure portion (70) and a corresponding transverse threaded hole (170A) formed in the flange (50, 55), the transverse holes (160A, 170A) extending parallel to the transverse direction (Y) and intended to be aligned.

5. The fan assembly (10) according to any one of the preceding claims, wherein: The mounting bracket (85) also includes a protrusion (175) that extends laterally (Y) relative to the bracket-fan interface (145) on the opposite side of the closure portion (70), with opposing threaded holes (160B) provided laterally (Y) in the protrusion (175) and intended to be aligned with corresponding opposing through holes (170B) extending laterally (Y) on the opposite side of the complementary cutout (65) in the flange (50). The second fixing device (95A, 95B, 95C) includes at least one screw (95B) which is intended to be received simultaneously in two opposing holes (160B, 170B).

6. A fan assembly (10) according to any one of the preceding claims, wherein the second fixing device (95A, 95B, 95C) comprises at least one screw (95C) intended to be received simultaneously in a longitudinal hole (160C) formed in the closure portion (70) and a corresponding longitudinal through hole (170C) formed in the flange (50, 55), the longitudinal holes (160C, 170C) extending parallel to the longitudinal direction (X) and intended to be aligned.

7. An electric motor (15) comprising a shaft (30) extending along a main axis (X1), flanges (50, 55) extending in a transverse plane (YZ) perpendicular to the main axis (X1), the flanges (50, 55) having a notch (65), and the fan assembly (10) being a fan assembly according to any one of the preceding claims.

8. The electric motor (15) of claim 7, wherein the fan shaft (X2) is intended to be arranged as an extension of the main shaft (X1).

9. The electric motor (15) according to claim 6 or claim 7, wherein the complementary cut (65) comprises two grooves (75) extending parallel to the transverse direction (Y) to form a slider for closing the portion (70).

10. The electric motor (15) according to claim 9, wherein, At least one groove (75) has a cross-section perpendicular to the transverse direction (Y) with a surface area near the main axis (X1) that is smaller than its surface area away from the main axis.

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