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CN-112787455-B - Cooling device for a traction motor of a vehicle, relative mechanical assembly, vehicle and replacement method

CN112787455BCN 112787455 BCN112787455 BCN 112787455BCN-112787455-B

Abstract

The invention relates to a cooling device for a traction motor of a carrier, a related mechanical assembly, a carrier and a replacement method. A cooling device (28) for a traction motor (24) of a vehicle (10), the motor (24) being surrounded by a housing (26) having a wall (36), the wall (36) being provided with at least one opening (38) for the ingress of an air flow. The cooling device (28) includes a housing (40) having a first face (48) and an opposite second face (50), the housing (40) defining an air-channeling duct (58) connecting an air inlet (52) located on the first face (48) to an air outlet (56) located on the second face (50), and an electric fan (42) mounted inside the housing (40) and configured to force an air flow to circulate. The cooling device (28) is configured to be removably secured to the housing (26).

Inventors

  • Gilles Guinier
  • Bruno laguin

Assignees

  • 阿尔斯通运输科技公司

Dates

Publication Date
20260512
Application Date
20201103
Priority Date
20191106

Claims (12)

  1. 1. A cooling device (28) for a traction motor (24) of a vehicle (10), the motor (24) being surrounded by a housing (26) having a wall (36), the wall (36) being provided with at least one opening (38) for an air flow for cooling the motor (24), the cooling device (28) comprising: -a housing (40) having a first face (48) and an opposite second face (50), the housing (40) defining an air-channeling duct (58) connecting an air inlet (52) located on the first face (48) to at least one air outlet (56) located on the second face (50), and -An electric fan (42) mounted inside the casing (40) and configured to force an air flow to circulate from an air inlet (52) to each air outlet (56), the electric fan (42) being configured to suck the air flow axially through the air inlet (52) with respect to a main axis (A-A') of a mechanical assembly (16) comprising the electric motor (24); The cooling device (28) is configured to be removably secured to the housing (26) by abutting a second face (50) of the cover (40) against a wall (36) of the housing (26), at least one of the air outlet (56) or the air outlet (56) being axially opposite the opening (38) or one of the openings (38) when the cooling device (28) is secured to the housing (26), Wherein the air flow circulates in the air-guiding duct (58) radially with respect to the main axis (A-A ') within the casing (40) in a portion of the air-guiding duct (58) arranged between the electric fan (42) and the at least one air outlet (56), such that the air circulates away from the main axis (A-A') and flows, then circulates through each air outlet (56) to reach each opening (38).
  2. 2. The cooling device (28) of claim 1, wherein the conduit (58) is configured to continuously reduce the airflow rate between the air inlet and the at least one air outlet.
  3. 3. The cooling device (28) according to claim 1, comprising a single air outlet of annular shape.
  4. 4. A cooling device (28) according to any one of claims 1-3, further comprising a plurality of fins (44) arranged in the air-channeling duct (58).
  5. 5. A cooling device (28) according to any one of claims 1-3, comprising a feed (46) for the electric fan (42) independent of the feed of the electric motor (24).
  6. 6. A cooling device (28) according to any one of claims 1-3, wherein the second face (50) of the casing (40) defines a cavity (54) such that the second face (50) has a concave hollow shape.
  7. 7. A cooling device (28) according to any one of claims 1-3, wherein the traction motor (24) is a motor of a railway vehicle.
  8. 8. A mechanical assembly (16), comprising: -a traction motor (24) of the vehicle (10), -A housing (26) surrounding the motor (24), the housing (26) comprising a wall (36), the wall (36) being provided with at least one through opening (38) for the passage of an air flow for cooling the motor (24); -a cooling device (28) according to any one of claims 1-3, the cooling device (28) being removably fixed to the housing, the second face (50) of the casing (40) being against the wall (36) of the housing (26) such that the air flow exiting through each air outlet (56) of the casing (40) feeds into one or more openings (38) of said wall (36).
  9. 9. The machine assembly (16) of claim 8, wherein the motor (24) includes a rotor (32) extending along a main axis (A-A') and a stator (34) extending around the rotor (32), the machine assembly (16) including at least one cooling channel (27) fed by one or more openings (38) and extending around a periphery of the stator (34).
  10. 10. The mechanical assembly (16) according to claim 9, the cooling device (28) being a cooling device (28) according to claim 6, wherein the mechanical assembly (16) comprises a speed measuring device (30) for measuring the rotational speed of the rotor (32) of the electric motor (24), the speed measuring device (30) being arranged between the second face (50) and the wall (36) of the housing (26) in the cavity (54).
  11. 11. Carrier (10) comprising at least one mechanical assembly (16) according to any one of claims 8 to 10.
  12. 12. The vehicle (10) according to claim 11, wherein the vehicle (10) is a railway vehicle.

Description

Cooling device for a traction motor of a vehicle, relative mechanical assembly, vehicle and replacement method Technical Field The present invention relates to a cooling device for a traction motor of a vehicle. The invention also relates to a mechanical assembly (ensemble de motorisation) comprising such a cooling device. The invention also relates to a vehicle comprising such a mechanical assembly. The invention also relates to a method for replacing a cooling device of such a mechanical assembly. Background The vehicle is, for example, a railway vehicle or, as a variant, an automotive vehicle, an aeronautical vehicle, or a maritime vehicle. It is necessary to cool the traction motor while it is running to avoid any overheating thereof and thereby ensure good operation thereof. It is known to rigidly fix a fan to a traction motor in order to cool it during its operation. The fan is directly coupled to and rotates simultaneously with the rotor of the traction motor. The fan then enables an air flow to be generated, thereby cooling the traction motor by forced convection. However, such fans have insufficient performance in terms of cooling, load loss, and noise. In practice, it is not possible to adjust the geometry of the fan over the entire operating range of the motor and to control the rotational speed of the fan independently, in particular with respect to the motor. In addition, maintenance of such fans is cumbersome because the maintenance requires disassembly of the entire motor (moteur) and may involve disassembly of the motor. It is an object of the present invention to propose a cooling device for a traction motor of a vehicle, which has improved cooling performance, while reducing noise caused by the operation of a fan and enabling easy maintenance. Disclosure of Invention To this end, the subject of the invention is a cooling device for a traction motor of a vehicle, in particular a railway vehicle, the motor being surrounded by a housing having a wall provided with at least one opening for the entry of an air flow for cooling the motor, the cooling device comprising a casing having a first face and an opposite second face, the casing defining an air-channeling duct connecting an air inlet located on the first face to at least one air outlet located on the second face, and an electric fan mounted inside the casing and configured to force the air flow to circulate from the air inlet to each air outlet, the cooling device being configured to be removably secured to the housing by the second face of the casing being abutted against the wall of the housing, at least one of the air outlets or air outlets being opposite to one of the openings or openings when the cooling device is secured to the housing. According to a specific embodiment of the invention, the cooling device also has one or more of the following features considered alone or following any technically possible combination: the dredging duct is configured to continuously reduce the air flow velocity between the air inlet and the at least one air outlet, The cooling device comprises a single air outlet of annular shape, The cooling device further comprises a plurality of fins arranged in the air-guiding duct, The cooling device comprises a supply for the electric fan independent of the supply of the electric motor, and The second face of the casing defines a cavity. The subject of the invention is also a mechanical assembly comprising a traction motor of a vehicle, a housing surrounding the motor, the housing comprising a wall provided with at least one through opening for the passage of an air flow for cooling the motor, a cooling device according to the subject of the invention described above, removably secured to the housing, the second face of the casing being against the wall of the housing such that the air flow exiting through each air outlet of the casing feeds into one or more openings of said wall. According to a particular embodiment of the invention, the mechanical assembly also has one or more of the following features considered alone or in combination: the motor comprises a rotor extending along a main axis and a stator extending around the rotor, the mechanical assembly comprising at least one cooling channel fed by one or more openings and extending around the periphery of the stator, and The mechanical assembly comprises a speed measuring device for measuring the rotational speed of the motor rotor, the speed measuring device being arranged between the second face and the wall of the housing, in the cavity. The subject of the invention is also a vehicle, in particular a railway vehicle, comprising at least one mechanical assembly as defined above. The subject of the invention is also a replacement method comprising the following steps: -providing a mechanical assembly as described above, and -Disassembling the cooling device and replacing it with another cooling device as defined above. Drawings The invention and its a