A contra-rotating motor based on a common motor

Abstract

The utility model relates to motor field, concretely is a kind of double-fan motor based on ordinary motor to improve. The utility model is a kind of technology that ordinary motor is changed into double-fan motor, is a kind of technology that ordinary motor is changed into double-fan motor by installing a set of conductive slip ring that can be normally powered under rotating state on ordinary motor, the motor housing is extended to form a hollow shaft, install two bearings on hollow shaft, make motor housing float up, then fix a conductive slip ring on armature, make conductive slip ring and armature synchronous rotation, armature connection line is connected on conductive slip ring. In addition, control armature current is sent to conductive slip ring by brush again, so that armature will rotate normally without power failure, rotor also rotates normally, armature and rotor simultaneously output power in opposite directions. The double-fan motor provided by the utility model has the advantages of simple technology, low cost and automatic adjustment of the speed of two output shafts according to load variation.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically a counter-rotating motor based on an improved ordinary motor. Background Technology

[0002] Counter-rotating motors have a single-input electrical port and two independent output mechanical ports, making them suitable for counter-rotating propeller propulsion systems. Counter-rotating propellers are crucial components for ensuring smooth propulsion of underwater vehicles and stable flight of aircraft, and are widely used in marine exploration and aerospace. Counter-rotating motor drive systems offer advantages such as compact structure, small size, and light weight, making them highly promising for future development. In recent years, researchers both domestically and internationally have paid increasing attention to counter-rotating motors. Currently, there are roughly two types of counter-rotating motors on the market: one involves designing a separate mechanism within the motor itself; the other uses two motors connected in series. The disadvantages of these two types are their technical complexity and high cost. Summary of the Invention

[0003] To address the issues of complex technology and high cost of existing counter-rotating motors on the market, this invention provides a counter-rotating motor based on an improved ordinary motor.

[0004] This utility model is achieved using the following technical solution: a counter-rotating motor based on an improved ordinary motor, comprising a motor housing, an armature, a rotor, and a central shaft. The rotor is mounted on the central shaft, and the armature is mounted on the motor housing. The central shaft and the motor housing are bearing-fitted. The motor housing also includes a counter-rotating motor housing, with each of its two ends extending outward to form a hollow shaft. Bearings are installed between the hollow shaft and the counter-rotating motor housing. The central shaft of the motor passes through the hollow shaft. A conductive slip ring is installed on one of the hollow shafts, and a brush is connected to the conductive slip ring. The conductive slip ring is connected to the armature through a conductive slip ring terminal. After the counter-rotating motor is connected to a power source, the armature and rotor output counter-rotating forces of opposite directions and equal magnitude through the hollow shaft and the central shaft, respectively.

[0005] Another technical solution is a counter-rotating motor based on an improved ordinary motor, comprising a motor housing, an armature, a rotor, and a central shaft. The armature is mounted on the central shaft, and the rotor is mounted on the motor housing. The central shaft and the motor housing are fitted with bearings. The key feature is that it further includes a counter-rotating motor housing, with one end of the housing extending outward to form a hollow shaft. A bearing is installed between the hollow shaft and the counter-rotating motor housing. One end of the central shaft passes through the hollow shaft, and a bearing is installed between the other end of the central shaft and the counter-rotating motor housing. A conductive slip ring is installed at the other end of the central shaft, and a brush is connected to the conductive slip ring. The conductive slip ring is connected to the armature through a conductive slip ring terminal. After the counter-rotating motor is connected to a power source, the armature and rotor simultaneously output counter-rotating forces of opposite directions and equal magnitude through the central shaft and the hollow shaft, respectively.

[0006] The aforementioned counter-rotating motor, which is an improvement on a conventional motor, has one end of the central shaft first engaging with the bearing in the motor housing before passing through the hollow shaft. The other end of the central shaft first engages with the bearing in the motor housing via a wire protective sleeve before a bearing is installed between it and the counter-rotating motor housing.

[0007] Another technical solution is a counter-rotating motor based on an ordinary motor, comprising a motor housing, an armature, a stator, and a central shaft. The armature is mounted on the central shaft, and the stator is mounted on the motor housing. The central shaft and the motor housing are fitted with bearings. A commutator brush structure is also installed on the central shaft inside the motor housing. The motor housing also includes a counter-rotating motor housing, with one end extending outward to form a hollow shaft. A bearing is installed between the hollow shaft and the counter-rotating motor housing. One end of the motor's central shaft passes through the hollow shaft, and a bearing is installed between the other end of the central shaft and the counter-rotating motor housing. A conductive slip ring is installed at the other end of the motor's central shaft, and brushes are connected to the conductive slip ring. The conductive slip ring terminals are connected to the brushes inside the motor. After the counter-rotating motor is connected to a power source, the armature and permanent magnet stator simultaneously output counter-rotating forces of equal magnitude and opposite directions through the central shaft and the hollow shaft, respectively.

[0008] The counter-rotating motor provided by this invention has the advantages of simple technology, low cost, and automatic adjustment of the speed of each of the two output shafts according to the load change; this technology can be applied to the fields of aircraft, underwater vehicles and electric vehicles. Attached Figure Description

[0009] Figure 1 This is a structural diagram of a counter-rotating motor consisting of a standard internal rotor motor and conductive slip rings.

[0010] Figure 2 This is a structural diagram of a counter-rotating motor consisting of a conductive slip ring and a standard external rotor motor.

[0011] Figure 3 This is a simplified diagram of a counter-rotating motor consisting of a DC motor and a conductive slip ring.

[0012] Figure 4 This is a schematic diagram of the structural principle of a conductive slip ring. In the diagram, a, b, and c represent conductive copper rings, and d, e, f, and g represent insulating partitions, where d is the first insulating partition.

[0013] In the diagram: 1-Conductive slip ring, 2-Brush, 3-Conductive slip ring terminal, 4-Armature wire, 5-Armature, 6-Permanent magnet rotor, 7-Motor housing, 8-Bearing, 9-Hollow shaft, 10-Central shaft, 11-Counter-rotor motor housing, 12-Wire protection sleeve, 13-Commutator, 14-Permanent magnet stator, 15-Conductive copper ring, 16-Wire through hole, 17-Shaft through hole, 18-Insulating partition. Detailed Implementation

[0014] This utility model is a technology for converting an ordinary motor into a counter-rotating motor. It involves adding a set of conductive slip rings that can supply power normally during rotation to an ordinary motor, thereby converting the ordinary motor into a counter-rotating motor.

[0015] The main working principle of this invention is based on the reaction force between the rotor and armature of a motor. In a conventional motor, when the rotor rotates in one direction, the armature experiences a thrust equal to or opposite to the rotor's rotation. For example, if the rotor rotates clockwise, the armature experiences a counter-clockwise thrust, and vice versa. Normally, the armature is stationary, and only the rotor rotates. If a device can be used to allow the armature to rotate in the opposite direction simultaneously, then the same motor can output opposing and equal counter-rotating forces, becoming a counter-rotating motor.

[0016] The main challenge in this invention is ensuring normal power supply while the armature rotates. Since the armature is connected to the outside via wires, its rotation causes the wires to twist and break, preventing the motor from functioning properly. By extending the motor housing to form a hollow shaft, and installing two bearings on this shaft to suspend the housing, a conductive slip ring is fixed to the armature, allowing it to rotate synchronously with the armature. The armature's connecting wires are connected to the slip ring. Furthermore, brushes deliver control current to the slip ring, ensuring the armature rotates normally without power loss, and the rotor also rotates normally, with both outputting power in opposite directions. This creates a counter-rotating motor with half the original speed and unchanged thrust. Another characteristic is that the armature and rotor automatically adjust their speeds; when the rotor load is high, the armature automatically increases its speed, and vice versa. This feature can be applied to differentials in electric vehicles and to address imbalances between rotor blades in aircraft. Because the motor housing is supported by bearings, there will be no external reaction force when the armature and rotor start running simultaneously, which can be applied to aircraft and submarines that are sensitive to reaction forces.

[0017] Figure 1 The diagram shows the structure of a counter-rotating motor consisting of a typical internal rotor motor and conductive slip rings. Since the armature of the internal rotor motor is fixed to the motor housing, the conductive slip rings are also mounted on an extended hollow shaft of the housing, just like the armature, to rotate synchronously with it.

[0018] A counter-rotating motor includes a motor housing 7, an armature 5, a permanent magnet rotor 6, and a central shaft 10. The permanent magnet rotor 6 is mounted on the central shaft 10, and the armature 5 is mounted on the motor housing 7. The central shaft 10 and the motor housing 7 are bearing-fitted. The motor housing 7 also includes a counter-rotating motor housing 11. Both ends of the motor housing 7 extend outward to form a hollow shaft 9. A bearing 8 is installed between the hollow shaft 9 and the counter-rotating motor housing 11. The motor shaft 10 passes through the hollow shaft 9. A conductive slip ring 1 is installed on one of the hollow shafts 9. A brush 2 is connected to the conductive slip ring 1. The conductive slip ring 1 is connected to the armature 5 through a conductive slip ring terminal 3. Its specific working principle is as follows: The external drive signals w, v, and u are sent to the brush 2 through wires, and then transmitted to the conductive slip ring 1 that is in contact with the brush 2; after entering the armature 5 through the conductive slip ring terminal 3 and the armature wire 4, the rotor 6 begins to rotate; at the same time, the armature 5 begins to rotate in the opposite direction due to the reaction force, and the armature 5 and the permanent magnet rotor 6 begin to output opposing and equal counter-rotating forces through the hollow shaft 9 and the central shaft 10, respectively.

[0019] Figure 2 The diagram shows a counter-rotating motor consisting of a conductive slip ring and a standard external rotor motor. Since its armature is fixedly mounted on the motor's central shaft, its conductive slip ring is also mounted on the central shaft, just like the armature.

[0020] A counter-rotating motor includes a motor housing 7, an armature 5, a permanent magnet rotor 6, and a central shaft 10. The armature 5 is mounted on the central shaft 10, and the permanent magnet rotor 6 is mounted on the motor housing 7. One end of the central shaft 10 is bearing-fitted with the motor housing 7, and the other end of the central shaft 10 is bearing-fitted with the motor housing 7 through a wire protection sleeve 12. The motor housing 7 also includes a counter-rotating motor housing 11. One end of the motor housing 7 extends outward to form a hollow shaft 9. A bearing 8 is installed between the hollow shaft 9 and the counter-rotating motor housing 11. One end of the central shaft 10 passes through the hollow shaft 9, and the other end of the central shaft 10 is bearing-fitted with the counter-rotating motor housing 11. A conductive slip ring 1 is installed at the other end of the central shaft 10. A brush 2 is connected to the conductive slip ring 1, and the conductive slip ring 1 is connected to the armature 5 through a conductive slip ring terminal 3. Its specific working principle is as follows: The external drive signals w, v, and u are sent to the brush 2 through the external wires, and then through the conductive slip ring 1 that contacts the brush 2, and through the conductive slip ring terminal 3 and the armature wire 4 to the armature 5. After the armature 5 is energized and starts to work, the permanent magnet rotor 6 starts to rotate. At the same time, the armature 5 also rotates in the opposite direction due to the reaction force. The armature 5 and the permanent magnet rotor 6 output opposite and equal counter-rotational forces through the central shaft 10 and the hollow shaft 9, respectively.

[0021] The structure of the conductor protective sleeve 12 is as follows Figure 2 As shown in Figure c, the wire protective sleeve 12 is provided with a wire through hole 16 and a shaft through hole 17.

[0022] Figure 3 The diagram shows a simplified counter-rotating motor consisting of a DC motor and conductive slip rings. Without altering the internal structure of the DC motor, simply adding a dual-path conductive slip ring creates a simplified counter-rotating motor.

[0023] A counter-rotating motor includes a motor housing 7, an armature 5, a permanent magnet stator 14, and a central shaft 10. The armature 5 is mounted on the central shaft 10, and the permanent magnet stator 14 is mounted on the motor housing 7. The central shaft 10 and the motor housing 7 are bearing-fitted. A commutator brush structure is also mounted on the central shaft 10. The motor housing 7 also includes a counter-rotating motor housing 11. One end of the motor housing 7 extends outward to form a hollow shaft 9. A bearing 8 is installed between the hollow shaft 9 and the counter-rotating motor housing 11. One end of the central shaft 10 passes through the hollow shaft 9, and the other end of the central shaft 10 is mounted between the central shaft 10 and the counter-rotating motor housing 11. There is a bearing 8, and a conductive slip ring 1 is installed at the other end of the central shaft 10 of the motor. A brush 2 is connected to the conductive slip ring 1, and the conductive slip ring terminal 3 on the conductive slip ring 1 is connected to the brush inside the motor. The specific working principle is as follows: external DC power is sent to the conductive slip ring 1 through the brush 2, and then sent to the brush inside the motor through the conductive slip ring terminal 3. The DC power is then supplied to the armature 5 through the commutator 13 and makes it rotate. At the same time, the permanent magnet stator 14 also rotates in the opposite direction. The armature 5 and the permanent magnet stator 14 output opposite and equal rotational forces through the central shaft 10 and the hollow shaft 9, respectively.

[0024] Figure 4 The diagram illustrates the principle of a conductive slip ring, which consists of several insulating partitions 18 and several conductive copper rings 15 connected in series. A conductive copper ring 15 is sandwiched between every two insulating partitions 18. A conductive slip ring terminal 3 is located within each conductive copper ring 15, and a brush 2 is connected to the top of the conductive copper ring 15. The conductive copper ring 15 is also filled with an insulating filler material, which has wire through holes 16 and shaft through holes 17. The insulating partitions 18 also have wire through holes 16 and shaft through holes 17. The first insulating partition 18 on the conductive slip ring only has a shaft through hole 17 (e.g., ...). Figure 4 (as shown in d).

[0025] Of the three options above, Figure 1 The technology described herein refers not only to brushless motors but also to all motors in which the rotor runs in the center, such as squirrel-cage three-phase motors and axial flux motors. It applies to any motor where the armature is fixed and the permanent magnet rotor rotates to output power. This invention merely illustrates the working principle of a brushless motor.

[0026] Figure 2In the technology described, the term "ordinary external rotor motor" does not specifically refer to a three-phase brushless motor. This technology can be used with any ordinary DC motor after removing the original brushes and commutator. This utility model only uses a brushless external rotor motor as a representative example.

[0027] Requirements: No manufacturer or individual may use conductive slip rings and motors to create a counter-rotating motor with the same or similar technical principles as this technology. This technology only uses three representative motors for technical illustration. Among them ( Figure 1 The internal rotor motor retrofit technology can also be used to retrofit three-phase asynchronous motors and axial flux motors (disc motors). Figure 3 It can be used for all types of DC motors with commutators.

Claims

1. A counter-rotating motor based on an improved conventional motor, comprising a motor housing (7), an armature (5), a rotor, and a central shaft (10), wherein the rotor is mounted on the central shaft (10), the armature (5) is mounted on the motor housing (7), and the central shaft (10) and the motor housing (7) are bearing-fitted, characterized in that: It also includes a counter-rotating motor housing (11), with the two ends of the motor housing (7) extending outward to form a hollow shaft (9), a bearing (8) installed between the hollow shaft (9) and the counter-rotating motor housing (11), the central shaft (10) of the motor passing through the hollow shaft (9), a conductive slip ring (1) installed on one of the hollow shafts (9), a brush (2) connected to the conductive slip ring (1), and the conductive slip ring (1) connected to the armature (5) through the conductive slip ring terminal (3).

2. A counter-rotating motor based on an improved conventional motor, comprising a motor housing (7), an armature (5), a rotor, and a central shaft (10), wherein the armature (5) is mounted on the central shaft (10), the rotor is mounted on the motor housing (7), and the central shaft (10) and the motor housing (7) are bearing-fitted, characterized in that: It also includes a counter-rotating motor housing (11), one end of the motor housing (7) extends outward to form a hollow shaft (9), a bearing (8) is installed between the hollow shaft (9) and the counter-rotating motor housing (11), one end of the motor's central shaft (10) passes through the hollow shaft (9), the other end of the motor's central shaft (10) is installed between the bearing (8) and the counter-rotating motor housing (11), a conductive slip ring (1) is installed at the other end of the motor's central shaft (10), a brush (2) is connected to the conductive slip ring (1), and the conductive slip ring (1) is connected to the armature (5) through the conductive slip ring terminal (3).

3. A counter-rotating motor based on an improved ordinary motor according to claim 2, characterized in that: One end of the central shaft (10) first engages with the bearing of the motor housing (7) and then passes through the hollow shaft (9). The other end of the central shaft (10) first engages with the bearing of the motor housing (7) through the wire protection sleeve (12) and then is connected to the bearing (8) between the central shaft (10) and the counter-rotating motor housing (11).

4. A counter-rotating motor based on an improved ordinary motor, comprising a motor housing (7), an armature (5), a stator, and a central shaft (10), wherein the armature (5) is mounted on the central shaft (10), the stator is mounted on the motor housing (7), the central shaft (10) and the motor housing (7) are bearing-fitted, and a commutator brush structure is also mounted on the central shaft (10), characterized in that: It also includes a counter-rotating motor housing (11), one end of the motor housing (7) extends outward to form a hollow shaft (9), a bearing (8) is installed between the hollow shaft (9) and the counter-rotating motor housing (11), one end of the motor's central shaft (10) passes through the hollow shaft (9), the other end of the motor's central shaft (10) is installed between the bearing (8) and the counter-rotating motor housing (11), a conductive slip ring (1) is installed at the other end of the motor's central shaft (10), a brush (2) is connected to the conductive slip ring (1), and the conductive slip ring terminal (3) on the conductive slip ring (1) is connected to the brush inside the motor.

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