WO2020043300A1 - Drone à refroidissement des rotors par air forcé - Google Patents

Drone à refroidissement des rotors par air forcé Download PDF

Info

Publication number
WO2020043300A1
WO2020043300A1 PCT/EP2018/073407 EP2018073407W WO2020043300A1 WO 2020043300 A1 WO2020043300 A1 WO 2020043300A1 EP 2018073407 W EP2018073407 W EP 2018073407W WO 2020043300 A1 WO2020043300 A1 WO 2020043300A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive motor
drone
air
fan
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/073407
Other languages
German (de)
English (en)
Inventor
Wolf-Henning OHLY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viafly GmbH
Original Assignee
Viafly GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Viafly GmbH filed Critical Viafly GmbH
Priority to PCT/EP2018/073407 priority Critical patent/WO2020043300A1/fr
Publication of WO2020043300A1 publication Critical patent/WO2020043300A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
    • B64U20/00—Constructional aspects of UAVs
    • B64U20/90—Cooling
    • B64U20/96—Cooling using air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
    • B64U50/00—Propulsion; Power supply
    • B64U50/10—Propulsion
    • B64U50/19—Propulsion using electrically powered motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
    • B64U10/00—Type of UAV
    • B64U10/10—Rotorcrafts
    • B64U10/13—Flying platforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
    • B64U30/00—Means for producing lift; Empennages; Arrangements thereof
    • B64U30/20—Rotors; Rotor supports

Definitions

  • the invention relates to a drone according to the preamble of claim 1.
  • the motors are usually cooled by their own movement by sucking air in on one side of the motor housing and releasing it on the other side. Internal heat sinks are also used, which can lead to cooling problems, particularly in the case of a dustproof or watertight housing of the aircraft.
  • the object of the present invention is to provide a drone of the type mentioned in the introduction, in which particularly effective cooling can be achieved.
  • a drone according to the invention comprises a drone body which has a plurality of arms. At least one first drive motor and one rotor coupled to the drive motor and rotating in a first direction of rotation about an axis of rotation are arranged on the arms. The arms are preferably of the same length and / or preferably extend outwards from a central section of the drone body.
  • the drone body has a cavity. This has - preferably in the central section of the drone body - at least one air intake opening, which is arranged centrally with respect to the plurality of rotors.
  • the air intake opening is in flow connection with channels formed in the arms. The channels are connected in their end area remote from the air intake opening to an intake area of a first drive motor.
  • a fan is arranged in the suction area of the first drive motor. When the first drive motor is operating, the fan draws air from the duct connected to the suction area in the associated arm.
  • the fan is actuated by turning the rotor and sucks in the air in the duct. Since the duct is in flow connection with the air intake opening in the central area of the drone body, air is conveyed into the interior of the drone body via this inlet when the fan is actuated. In this way, the drone, and in particular its drive motors, are continuously cooled during flight.
  • a second drive motor and a rotor which is coupled to the second drive motor and rotates in a second direction of rotation opposite to the first direction of rotation is further arranged on each arm. In this way it is achieved that two coaxial rotors with different, opposite directions of rotation are arranged on each arm of the drone. This has the effect that any torques acting on the arm are compensated and the drone is in the air much more calmly and stably.
  • the channels are connected in their end area remote from the air intake opening to an intake area of a second drive motor.
  • a fan is arranged in the intake area of the second drive motor, which draws air from the duct connected to the intake area when the second drive motor is in operation.
  • the cooling according to the invention can thus also be used for the other motor on the same arm of the drone.
  • each fan rotates coaxially with the axis of rotation of the rotor coupled to the respective drive motor.
  • the rotor and fan can be directly coupled to the drive shaft of each motor.
  • the air intake opening is arranged on the top of the drone body.
  • several air intake openings can also be provided. These do not have to be located in the central area and / or on the underside of the drone body, but can also be arranged, for example, on the arms or on an underside of the drone body.
  • a central air intake opening has the advantage that air is sucked in evenly into all arms and thus all motors can be cooled evenly.
  • a filter element is arranged in the air intake opening, since in this way it can be prevented that, for example, contaminants in the air and in the intake air get solid components into the engine area.
  • Figure 1 - shows a schematic sectional view through a drone according to the invention.
  • FIG. 2 shows an enlarged detail of the sectional view from FIG. 1 in the area of the central cut the drone's distal end of one arm.
  • Figure 3 - shows a sectional view through a drive motor according to the invention in the region of the fan perpendicular to its axis of rotation.
  • the drone 1 shown in FIG. 1 has a central section 2 with a cavity 2a therein, to which a plurality of arms 3 are attached. At the top of the central section 2, an air intake opening 5 is shown, which in the example shown has a filter element 5a for filtering the air sucked in thereby.
  • the reference numeral 7 designates a control unit of the drone 1, which on the one hand controls the suction of the air and can also take over the rest of the control of the drive motors 9.
  • each arm 3 there is at least one rotor 6, which is set in rotation via a drive shaft 8.
  • the drive shaft 8 is coupled to a drive motor 9.
  • two motors 9 are arranged on each arm. These are preferably designed so that their directions of rotation are opposite to each other.
  • the invention can also be implemented with only one drive motor 9 per arm 3.
  • the arms 3 have channels which transport air 4, which is drawn in in the central region (arrow P1), to the motors 9. animals.
  • the motors 9 have an internal fan 9c, which draws in the air through the opening 5 and guides it through the drive motor 9 (arrows P2 and P3 in FIG. 1).
  • the fan 9c can be seen in more detail in FIGS. 2 and 3.
  • the motor 9 is provided on the inside with a cavity 9b, within which the fan 9c is arranged and through which air 4 can flow in the axial direction.
  • the engine is open at both ends in the axial direction, so that air 4 can enter the intake area of the fan 9c and exit at the other end of the engine 9. If the fan 9c is rotated - this happens when the motor 9 also rotates the rotor 6, that is, when the drive motor 9 is switched on - then it sucks the air 4 through the suction opening 5 (FIG. 1 ⁇ into the interior 2a and through the duct 3a connected to the arm 3. Since the motor 9 has an interior 9b enclosed by an outer wall 9a and open axially on both sides, the fan 9c can guide the air sucked in from the arm 3 through the drive motor 9 and thus the drive motor 9 cool inside.
  • the drive motors 9 are provided for each arm 3, both of which have a fan 9c, so that the one arriving from the arm 3, or its duct 3a Air 4 is deflected in two different directions P2 and P3 and passed through the respective drive motors 9.
  • the axis of rotation 8 of the fan 9c is preferably arranged coaxially to the axis of rotation A of the rotors 6 used. This then ensures particularly uniform cooling of the drive motors 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Remote Sensing (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un drone (1) présentant un corps (2) muni d'une pluralité de bras (3) sur chacun desquels sont montés au moins un premier moteur d'entraînement (9) et un rotor (6) couplé à ce moteur d'entraînement (9) et tournant autour d'un axe de rotation (A) dans un premier sens de rotation. Le corps (2) du drone comporte une cavité (2a, 3a) pourvue d'au moins un orifice d'aspiration d'air (5) placé en particulier de manière centrale par rapport à la pluralité des rotors (6). L'orifice d'aspiration d'air (5) est en communication fluidique avec des canaux (3a) formés dans les bras (3), ces canaux (3a) étant reliés à une zone d'aspiration (9b) d'un premier moteur d'entraînement (9) dans leur zone d'extrémité éloignée de l'orifice d'aspiration d'air, un ventilateur (9c) étant disposé dans la zone d'aspiration (9b) du premier moteur d'entraînement (9), lequel aspire l'air du canal (3a) relié à la zone d'aspiration (9b) lorsque le premier moteur d'entraînement (9) est en fonctionnement.
PCT/EP2018/073407 2018-08-30 2018-08-30 Drone à refroidissement des rotors par air forcé Ceased WO2020043300A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/073407 WO2020043300A1 (fr) 2018-08-30 2018-08-30 Drone à refroidissement des rotors par air forcé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/073407 WO2020043300A1 (fr) 2018-08-30 2018-08-30 Drone à refroidissement des rotors par air forcé

Publications (1)

Publication Number Publication Date
WO2020043300A1 true WO2020043300A1 (fr) 2020-03-05

Family

ID=63517863

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/073407 Ceased WO2020043300A1 (fr) 2018-08-30 2018-08-30 Drone à refroidissement des rotors par air forcé

Country Status (1)

Country Link
WO (1) WO2020043300A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4137414A1 (fr) * 2021-08-19 2023-02-22 Hamilton Sundstrand Corporation Système de refroidissement de moteur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016192021A1 (fr) * 2015-06-01 2016-12-08 SZ DJI Technology Co., Ltd. Systèmes et procédés pour des bras pliables
US20170070125A1 (en) * 2015-06-01 2017-03-09 SZ DJI Technology Co., Ltd. System, kit, and method for dissipating heat generated by a motor assembly
US20170233073A1 (en) * 2015-06-01 2017-08-17 SZ DJI Technology Co., Ltd. Uav having barometric sensor and method of isolating disposing barometric sensor within uav

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016192021A1 (fr) * 2015-06-01 2016-12-08 SZ DJI Technology Co., Ltd. Systèmes et procédés pour des bras pliables
US20170070125A1 (en) * 2015-06-01 2017-03-09 SZ DJI Technology Co., Ltd. System, kit, and method for dissipating heat generated by a motor assembly
US20170233073A1 (en) * 2015-06-01 2017-08-17 SZ DJI Technology Co., Ltd. Uav having barometric sensor and method of isolating disposing barometric sensor within uav

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JACK WRANGHAM: "DJI Agras MG-1 Crop Spraying Drone - Drone AG", 7 November 2015 (2015-11-07), XP055566305, Retrieved from the Internet <URL:https://droneag.farm/dji-agras-mg-1-crop-spraying-drone/> [retrieved on 20190308] *
JON VERBECKE: "Multicopters - A practical View on Unmanned Aerial Vehicles", 7 July 2014 (2014-07-07), XP055566724, Retrieved from the Internet <URL:http://www.fzt.haw-hamburg.de/pers/Scholz/dglr/hh/text_2014_06_05_Multicopters.pdf> [retrieved on 20190308] *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4137414A1 (fr) * 2021-08-19 2023-02-22 Hamilton Sundstrand Corporation Système de refroidissement de moteur
US20230055244A1 (en) * 2021-08-19 2023-02-23 Hamilton Sundstrand Corporation Motor cooling system
US12275534B2 (en) * 2021-08-19 2025-04-15 Hamilton Sundstrand Corporation Motor cooling system

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