CN111237211A - Electric contra-rotating ducted fan - Google Patents

Abstract

The invention discloses an electric counter-rotating ducted fan. It includes a driving mechanism, a first fan body, a second fan body and a transmission mechanism. The first fan body and the second fan body are arranged opposite each other up and down. The driving mechanism is used to drive the second fan body to rotate. The transmission mechanism The two transmission ends are respectively connected with the first fan body and the second fan body, and the transmission mechanism is used to drive the first fan body to rotate in the opposite direction and the same speed relative to the second fan body under the driving of the second fan body. The invention only drives one fan body to rotate, and drives the other fan body to rotate in the opposite direction through the transmission mechanism, thereby driving the two fan bodies to rotate in the opposite direction, thereby improving the driving efficiency.

Description

Electric contra-rotating ducted fan

technical field

The invention relates to the technical field of ducted fans, in particular to an electric counter-rotating ducted fan.

Background technique

Existing electric ducted fans generally use one motor to drive a fan to do one-way motion, which has the problem of torque imbalance; at the same time, a motor with a small diameter is used to drive a fan with a larger diameter at the shaft center, requiring the motor to have a large diameter. Large torque, that is, the motor requires high power; at the same time, there is only one fan for unidirectional movement, and its compression ratio is also relatively low, and the efficiency is not high.

The turbofan engine used in modern jet aircraft also has a mechanically driven ducted fan. In the EU's VITAL-EnvironmenTaLly FriendlyAeroengine project, the French Snecma company led the contra-rotating turbofan project. Through pre-research, the research shows that if the two sets of fans are rotated in opposite directions, the pressure ratio of the second-stage fan can be maintained at a relatively high level, and the pressure ratio is about 1.4~1.6. Compared with conventional co-rotating multi-stage fans, under the condition of the same fan size and the same pressure ratio, the fan speed can be greatly reduced, thereby reducing noise and fuel consumption; but in order to make the two sets of fans rotate oppositely, the vortex The structure of the fan engine is a three-rotor structure, and its mechanical structure is extremely complex. The complex structure leads to an increase in weight, and the comprehensive benefit is not significantly improved.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides an electric counter-rotating ducted fan, which only drives one fan body to rotate, and drives the other fan body to rotate in the opposite direction through the transmission mechanism, thereby driving the two fan bodies to rotate in the opposite direction. Improved drive efficiency.

In order to solve the above problems, the present invention adopts the following technical solutions to realize:

The electric counter-rotating ducted fan of the present invention includes a driving mechanism, a first fan body, a second fan body and a transmission mechanism. The two fan bodies rotate, and the two transmission ends of the transmission mechanism are respectively connected with the first fan body and the second fan body. The transmission mechanism is used to drive the first fan body relative to the second fan under the driving of the second fan body. The bodies rotate in opposite directions at the same speed.

In this solution, the axes of the first fan body and the second fan body are located on the same straight line. The driving mechanism drives the second fan body to rotate, and the second fan body drives the first fan body to rotate in the opposite direction and at the same speed relative to the second fan body through the transmission mechanism. Only one driving mechanism is used in this solution, the weight of the driving device is reduced, the cost is saved, and the structure is simple and easy to control.

Preferably, the transmission mechanism includes two linkage gears and at least one transmission gear, one linkage gear is coaxially connected to the first fan body, and the other linkage gear is coaxially connected to the second fan body, and the linkage gear passes through the bearing sleeve. The transmission gear is arranged on the longitudinal shaft arranged in the longitudinal direction, the transmission gear is located between and meshes with the two linkage gears, and the transmission gear is sleeved on the horizontal shaft arranged in the transverse direction through a bearing.

When the second fan body rotates, it drives the linked gear connected to it to rotate, and the transmission gear drives the other linked gear to rotate in reverse synchronously. The direction of rotation is opposite and the speed is the same. Both the linkage gear and the transmission gear are bevel gears.

Preferably, the driving mechanism is located between the first fan body and the second fan body, one end of the horizontal shaft is fixedly connected to the vertical shaft, and the other end of the horizontal shaft is fixedly connected to the driving mechanism. The horizontal axis and the vertical axis are perpendicular to each other, and the axis of the horizontal axis intersects the axis of the vertical axis.

Preferably, the driving mechanism is located between the first fan body and the second fan body, the driving mechanism is fixedly connected to the longitudinal shaft through a connecting mechanism, and the connecting mechanism includes at least one horizontally arranged connecting shaft, the connecting shaft One end is fixedly connected with the longitudinal shaft, and the other end of the connecting shaft is fixedly connected with the driving mechanism. The drive mechanism is fixed on the longitudinal shaft through the connecting shaft.

Preferably, the drive mechanism includes an annular support coaxial with the longitudinal axis, the outer wall of the annular support is provided with a plurality of electromagnets along the circumference, and the electromagnets are arranged in the longitudinal direction, and the second fan body includes a longitudinal A ring-shaped frame body with a coaxial shaft, a plurality of duct fan blades are evenly distributed on the inner side of the ring-shaped frame body, and a plurality of permanent magnets are arranged on the outer edge of the ring-shaped frame body along the circumference, and the magnetic poles of the adjacent permanent magnets facing the electromagnet are opposite. , the permanent magnet on the second fan body is located below the bottom magnetic pole of the electromagnet.

The bottom magnetic pole of the electromagnet is constantly changing so as to push the second fan body to rotate. The electromagnets are distributed at equal intervals along the outer wall of the annular support, and the permanent magnets are distributed at equal intervals along the outer edge of the annular frame. The diameter of the circle enclosed by all the permanent magnets on the annular frame is the same as the diameter of the circle enclosed by all the electromagnets. The outer wall of the annular bracket is provided with a plurality of installation grooves for installing the electromagnets along the circumference, and the bottom of the installation grooves is open. The electromagnet includes a cylindrical magnetic core and a coil wound on the magnetic core, and the bottom of the magnetic core faces the opening at the bottom of the installation slot.

Preferably, the drive mechanism includes an annular support coaxial with the longitudinal axis, the bottom of the annular support is provided with an annular mounting seat, the mounting seat is coaxial with the longitudinal axis, and the inner side wall of the mounting seat is along the circumference A plurality of electromagnets are arranged in the direction of the mounting seat, the electromagnets are arranged along the radial direction of the mounting seat, the second fan body is located inside the mounting seat, and the second fan body includes an annular frame body coaxial with the longitudinal axis, The inner side of the annular frame body is evenly distributed with a plurality of duct fan blades, the outer edge of the annular frame body is provided with a plurality of permanent magnets along the circumference, the magnetic poles of the adjacent permanent magnets facing the electromagnet are opposite, and the permanent magnets on the second fan body are opposite. The magnet is located inside the electromagnet. The axis of the circle enclosed by all the electromagnets on the mounting seat and the axis of the circle enclosed by all the permanent magnets are on the same line.

Preferably, an annular frame sleeve is sleeved on the outer side of the annular frame body, an annular gap exists between the annular frame sleeve and the annular frame body, and the permanent magnet is located in the annular gap.

The electric counter-rotating ducted fan of the present invention includes a driving mechanism, a first fan body, a second fan body and a transmission mechanism. The first fan body and the second fan body are arranged up and down opposite to each other, and the driving mechanism is located in the first fan. Between the fan body and the second fan body, the drive mechanism includes an annular bracket, the upper end of the outer wall of the annular bracket is provided with a first drive module for driving the rotation of the first fan body, and the lower end of the outer wall of the annular bracket is provided with a first drive module for driving the rotation of the first fan body. A second drive module that drives the second fan body to rotate, two transmission ends of the transmission mechanism are respectively connected with the first fan body and the second fan body, and the transmission mechanism can drive another fan body under the driving of one fan body Rotate at the same speed and make the rotation directions of the two fan bodies opposite.

In this solution, the first drive module can be controlled to drive the first fan body to rotate, and the first fan body drives the second fan body to rotate at the same speed in the opposite direction relative to the first fan body through the transmission mechanism, and the second drive module can also be controlled The second fan body is driven to rotate, and the second fan body drives the first fan body to rotate in the opposite direction and at the same speed relative to the second fan body through the transmission mechanism.

This solution can drive any one fan body to rotate, thereby driving two fan bodies to rotate at the same speed in opposite directions. When working, if one drive mechanism fails, another drive mechanism can be used to ensure the normal operation of the electric counter-rotating ducted fan and improve reliability.

Preferably, the first drive module includes an annular first mounting seat disposed on the top of the annular bracket, the inner side wall of the first mounting seat is provided with a plurality of first electromagnets along the circumferential direction, and the first electromagnetic The iron is arranged along the radial direction of the first mounting seat, the second driving module includes an annular second mounting seat arranged on the top of the annular bracket, and the inner side wall of the second mounting seat is provided with a plurality of second mounting seats along the circumferential direction. Electromagnet, the second electromagnet is arranged along the radial direction of the second mounting seat, the first fan body is located inside the first mounting seat, the second fan body is located inside the second mounting seat, the first fan The structure of the fan body is the same as that of the second fan body, and both include an annular frame body. A plurality of ducted fan blades are evenly distributed on the inner side of the annular frame body. The adjacent permanent magnets on a fan body have opposite magnetic poles toward one end of the first electromagnet, and the adjacent permanent magnets on the second fan body face opposite magnetic poles at one end of the second electromagnet. The permanent magnets on the first fan body have opposite magnetic poles. The magnet is located inside the first electromagnet, and the permanent magnet on the second fan body is located inside the second electromagnet.

The axis of the circle enclosed by all permanent magnets on the first fan body, the axis of the circle enclosed by all permanent magnets on the second fan body, the axis of the circle enclosed by all the first electromagnets, the axis of the circle enclosed by all the first electromagnets, the axis of the circle enclosed by all the permanent magnets on the second fan body The axes of the circles enclosed by the electromagnets are all on the same straight line. The constant change of the inner magnetic pole of the first electromagnet can push the first fan body to rotate, and the constant change of the inner end magnetic pole of the second electromagnet can push the second fan body to rotate.

Preferably, an annular frame sleeve is sleeved on the outer side of the annular frame body, an annular gap exists between the annular frame sleeve and the annular frame body, and the permanent magnet is located in the annular gap.

Preferably, the axes of the first fan body and the second fan body are on the same straight line, the transmission mechanism includes two linkage gears and at least one transmission gear, one linkage gear is coaxially connected to the first fan body, and the other is linked The gear is coaxially connected to the second fan body, the linkage gear is sleeved on the longitudinally arranged longitudinal shaft through a bearing, the transmission gear is located between the two linkage gears and meshes with the two linkage gears, and the transmission gear passes through the two linkage gears. The bearing sleeve is arranged on the horizontal shaft arranged horizontally.

When both the first drive module and the second drive module are working, the transmission mechanism also has a synchronous function. Both fan bodies rotate to drive the linkage gear to rotate, and the upper and lower linkage gears rotate in opposite directions to output force to the transmission gear to drive the transmission gear to rotate. The transmission gear enables the upper and lower fan bodies to rotate synchronously and reversely to ensure the same rotational speed of the two fan bodies.

The beneficial effect of the present invention is that only one fan body is driven to rotate, and the other fan body is driven to rotate in the opposite direction through the transmission mechanism, thereby driving the two fan bodies to rotate in the opposite direction, thereby improving the driving efficiency.

Description of drawings

Fig. 1 is the internal structure schematic diagram of embodiment 1;

Fig. 2 is the side view of the annular stent of embodiment 1;

3 is a schematic structural diagram of the second fan body of Embodiment 1;

Fig. 4 is the working principle schematic diagram of embodiment 1;

Fig. 5 is the internal structure schematic diagram of embodiment 2;

Fig. 6 is the structural representation of the drive mechanism of embodiment 2;

7 is a schematic structural diagram of the second fan body of Embodiment 2;

FIG. 8 is a schematic diagram of the internal structure of Embodiment 3. FIG.

In the figure: 1. Drive mechanism, 2. First fan body, 3. Second fan body, 4. Linkage gear, 5. Transmission gear, 6. Longitudinal axis, 7. Horizontal axis, 8. Connecting axis, 9. Ring bracket, 10, electromagnet, 11, annular frame, 12, ducted fan blade, 13, permanent magnet, 14, installation slot, 15, installation seat, 16, first electromagnet, 17, second electromagnet, 18. The first mounting seat, 19, the second mounting seat, 20, the annular frame sleeve.

Detailed ways

The technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

Embodiment 1: The electric counter-rotating ducted fan of this embodiment, as shown in Figure 1, Figure 2, Figure 3, includes a drive mechanism 1, a first fan body 2, a second fan body 3 and a transmission mechanism, the first fan The body 2 and the second fan body 3 are arranged opposite each other up and down. The drive mechanism 1 is used to drive the second fan body 3 to rotate. The two transmission ends of the transmission mechanism are respectively connected with the first fan body 2 and the second fan body 3. The transmission mechanism uses Driven by the second fan body 3, the first fan body 2 is driven to rotate in opposite directions and at the same speed relative to the second fan body 3, and the axes of the first fan body 2 and the second fan body 3 are located on the same straight line.

The transmission mechanism includes two linkage gears 4 and two transmission gears 5. One linkage gear 4 is coaxially connected to the first fan body 2, and the other linkage gear 4 is coaxially connected to the second fan body 3. The linkage gear 4 passes through the bearing sleeve. On the longitudinal shaft 6 arranged in the longitudinal direction, the transmission gear 5 is located between the two linkage gears 4 and meshes with the two linkage gears 4. The transmission gear 5 is sleeved on the transverse shaft 7 through a bearing.

The drive mechanism 1 is located between the first fan body 2 and the second fan body 3. The drive mechanism 1 includes an annular bracket 9 coaxial with the longitudinal axis 6. The transmission mechanism is located inside the annular bracket 9. The outer wall of the annular bracket 9 is along the circumference. A plurality of electromagnets 10 are arranged at equal intervals, and the electromagnets 10 are arranged in the longitudinal direction. The second fan body 3 includes an annular frame body 11 that is coaxial with the longitudinal axis 6. The inner side of the annular frame body 11 is evenly distributed with a plurality of ducted fan blades 12. , the outer edge of the annular frame body 11 is provided with a plurality of permanent magnets 13 at equal intervals along the circumference, the magnetic poles of the adjacent permanent magnets 13 facing the electromagnet 10 are opposite, and the permanent magnets 13 on the second fan body 3 are located at the bottom of the electromagnet 10. below. The diameter of the circle enclosed by all the permanent magnets 13 on the annular frame body 11 is the same as the diameter of the circle enclosed by all the electromagnets 10 .

The horizontal axis 7 and the vertical axis 6 are perpendicular to each other, and the axis of the horizontal axis 7 intersects the axis of the vertical axis 6 . The two horizontal shafts 7 are coaxial, one end of the horizontal shaft 7 is fixedly connected with the vertical shaft 6 , and the other end of the horizontal shaft 7 is fixedly connected with the annular support 9 . Both the linkage gear 4 and the transmission gear 5 are bevel gears.

The drive mechanism 1 is fixedly connected with the longitudinal shaft 6 through a connecting mechanism, and the connecting mechanism includes two laterally arranged connecting shafts 8, one end of the connecting shaft 8 is fixedly connected with the vertical shaft 6, the other end of the connecting shaft 8 is fixedly connected with the annular support 9, and the two are fixedly connected. The connecting shafts 8 are coaxial, and the connecting shafts 8 and the horizontal axis 7 are perpendicular to each other. The drive mechanism is fixed on the vertical shaft through the horizontal shaft and the connecting shaft, forming an integral body to ensure the normal operation of the dual-rotor motor.

In this solution, the driving mechanism drives the second fan body to rotate, and when the second fan body rotates, it drives the linkage gear connected to it to rotate, the transmission gear drives another linkage gear to rotate synchronously in the opposite direction, and the other linkage gear drives the first linkage gear connected to it to rotate. A fan body rotates in the opposite direction synchronously to ensure that the rotation directions of the two fan bodies are opposite and the rotational speed is the same. Only one driving mechanism is used in this solution, the weight of the driving device is reduced, the cost is saved, and the structure is simple and easy to control.

The working principle of this scheme is shown in Figure 4. The magnetic poles of one end of the adjacent permanent magnets on the annular frame facing the electromagnet are opposite (that is, the magnetic poles of the one end of any two adjacent permanent magnets facing the electromagnet on the annular frame are N pole, S pole pole), the bottom magnetic pole of the electromagnet is constantly changing to push the second fan body to rotate.

The outer wall of the annular bracket 9 is provided with a plurality of mounting grooves 14 for mounting electromagnets along the circumference, and the bottom of the mounting grooves 14 is open. The electromagnet 10 includes a cylindrical magnetic core and a coil wound on the magnetic core. The bottom of the magnetic core faces the opening at the bottom of the mounting slot 14 .

Embodiment 2: The electric counter-rotating ducted fan of this embodiment, as shown in Figure 5, Figure 6, and Figure 7, includes a drive mechanism 1, a first fan body 2, a second fan body 3 and a transmission mechanism, the first fan The body 2 and the second fan body 3 are arranged opposite each other up and down. The drive mechanism 1 is used to drive the second fan body 3 to rotate. The two transmission ends of the transmission mechanism are respectively connected with the first fan body 2 and the second fan body 3. The transmission mechanism uses Driven by the second fan body 3, the first fan body 2 is driven to rotate in opposite directions and at the same speed relative to the second fan body 3, and the axes of the first fan body 2 and the second fan body 3 are located on the same straight line.

The transmission mechanism includes two linkage gears 4 and two transmission gears 5. One linkage gear 4 is coaxially connected to the first fan body 2, and the other linkage gear 4 is coaxially connected to the second fan body 3. The linkage gear 4 passes through the bearing sleeve. On the longitudinal shaft 6 arranged in the longitudinal direction, the transmission gear 5 is located between the two linkage gears 4 and meshes with the two linkage gears 4. The transmission gear 5 is sleeved on the transverse shaft 7 through a bearing.

The drive mechanism 1 is located between the first fan body 2 and the second fan body 3. The drive mechanism 1 includes an annular support 9 coaxial with the longitudinal axis 6. The transmission mechanism is located inside the annular support 9. The bottom of the annular support 9 is provided with A ring-shaped mounting seat 15, the mounting seat 15 is coaxial with the longitudinal axis 6, the inner side wall of the mounting seat 15 is provided with a plurality of electromagnets 10 at equal intervals along the circumferential direction, the electromagnets 10 are arranged along the radial direction of the mounting seat 15, and the second fan The body 3 is located inside the mounting seat 15. The second fan body 3 includes an annular frame body 11 coaxial with the longitudinal axis 6. The inner side of the annular frame body 11 is evenly distributed with a plurality of duct fan blades 12. The outer edge of the annular frame body 11 is along the circumference A plurality of permanent magnets 13 are arranged at equal intervals, and one end of the adjacent permanent magnets 13 facing the electromagnet 10 has opposite magnetic poles. The frame sleeve 20, an annular gap exists between the annular frame sleeve 20 and the annular frame body 11, and the permanent magnet 13 is located in the annular gap. The axis of the circle enclosed by all the electromagnets on the mounting seat and the axis of the circle enclosed by all the permanent magnets are on the same line.

The horizontal axis 7 and the vertical axis 6 are perpendicular to each other, and the axis of the horizontal axis 7 intersects the axis of the vertical axis 6 . The two horizontal shafts 7 are coaxial, one end of the horizontal shaft 7 is fixedly connected with the vertical shaft 6 , and the other end of the horizontal shaft 7 is fixedly connected with the annular support 9 . Both the linkage gear 4 and the transmission gear 5 are bevel gears.

The drive mechanism 1 is fixedly connected with the longitudinal shaft 6 through a connecting mechanism, and the connecting mechanism includes two laterally arranged connecting shafts 8, one end of the connecting shaft 8 is fixedly connected with the vertical shaft 6, the other end of the connecting shaft 8 is fixedly connected with the annular support 9, and the two are fixedly connected. The connecting shafts 8 are coaxial, and the connecting shafts 8 and the horizontal axis 7 are perpendicular to each other. The drive mechanism is fixed on the vertical shaft through the horizontal shaft and the connecting shaft, forming an integral body to ensure the normal operation of the dual-rotor motor.

In this solution, the electromagnet is arranged horizontally, and the axis extension line of the electromagnet intersects the axis of the annular support. The magnetic poles of one end of the adjacent permanent magnets facing the electromagnet are opposite (that is, the magnetic poles of any two adjacent permanent magnets facing the electromagnet are N pole and S pole), and the inner end of the electromagnet is constantly changing to push the second pole. The fan body rotates, and the second fan body drives the first fan body to rotate synchronously in opposite directions and at the same speed through the transmission mechanism.

Embodiment 3: The electric counter-rotating ducted fan of this embodiment, as shown in Figure 8, includes a drive mechanism 1, a first fan body 2, a second fan body 3 and a transmission mechanism, a first fan body 2 and a second fan The body 3 is arranged up and down opposite to each other, the axes of the first fan body 2 and the second fan body 3 are located on the same straight line, the driving mechanism 1 is located between the first fan body 2 and the second fan body 3, and the driving mechanism 1 includes an annular bracket 9, The upper end of the outer wall of the annular bracket 9 is provided with a first drive module for driving the rotation of the first fan body 2, and the lower end of the outer wall of the annular bracket 9 is provided with a second drive module for driving the rotation of the second fan body 3. The ends are respectively connected with the first fan body 2 and the second fan body 3, and the transmission mechanism can drive the other fan body to rotate at the same speed under the driving of one fan body and make the rotation directions of the two fan bodies opposite.

The transmission mechanism is located inside the annular bracket 9 , and the transmission mechanism includes two linkage gears 4 and two transmission gears 5 , one linkage gear 4 is coaxially connected to the first fan body 2 , and the other linkage gear 4 is the same as the second fan body 3 The shaft is connected, the linkage gear 4 is sleeved on the longitudinal shaft 6 arranged longitudinally through the bearing, the transmission gear is located between the two linkage gears 4 and meshes with the two linkage gears 4, and the transmission gear is sleeved through the bearing on the horizontal shaft arranged in the transverse direction. 6 , the annular support 9 is coaxial with the longitudinal axis 6 .

The first drive module includes a ring-shaped first mounting seat 18 arranged on the top of the ring-shaped bracket 9 . The inner side wall of the first mounting seat 18 is provided with a plurality of first electromagnets 16 at equal intervals along the circumferential direction. The radial arrangement of the first mounting seat 18, the second driving module includes an annular second mounting seat 19 arranged on the top of the annular bracket 9, and the inner side wall of the second mounting seat 19 is provided with a plurality of second mounting seats at equal intervals along the circumferential direction. The electromagnet 17 and the second electromagnet 17 are arranged along the radial direction of the second mounting seat 19 , the first fan body 2 is located inside the first mounting seat 18 , the second fan body 3 is located inside the second mounting seat 19 , the first fan body 2 and the second fan body 3 have the same structure, and both include an annular frame body 11, a plurality of duct fan blades 12 are evenly distributed on the inside of the annular frame body 11, and a plurality of permanent magnets are arranged on the outer edge of the annular frame body 11 at equal intervals along the circumference. 13. One end of the adjacent permanent magnets 13 on the first fan body 2 facing the first electromagnet 16 has opposite magnetic poles, and one end of the adjacent permanent magnets 13 on the second fan body 3 facing the second electromagnet 17 has opposite magnetic poles. The permanent magnet 13 on the fan body 2 is located on the inner side of the first electromagnet 16, the permanent magnet 13 on the second fan body 3 is located on the inner side of the second electromagnet 17, and the outer side of the annular frame body 11 is sleeved with an annular frame sleeve 20. An annular gap exists between the frame sleeve 20 and the annular frame body 11, and the permanent magnet 13 is located in the annular gap.

The axis of the circle enclosed by all permanent magnets on the first fan body, the axis of the circle enclosed by all permanent magnets on the second fan body, the axis of the circle enclosed by all the first electromagnets, the axis of the circle enclosed by all the first electromagnets, the axis of the circle enclosed by all the permanent magnets on the second fan body The axes of the circles enclosed by the electromagnets are all on the same straight line.

In this solution, the constant change of the inner magnetic pole of the first electromagnet can push the first fan body to rotate, and the constant change of the inner end magnetic pole of the second electromagnet can push the second fan body to rotate. This solution can control the first drive module to drive the first fan body to rotate, the first fan body drives the second fan body to rotate at the same speed in the opposite direction relative to the first fan body through the transmission mechanism, and can also control the second drive module to drive the second fan body to rotate at the same speed. The fan body rotates, and the second fan body drives the first fan body to rotate in the opposite direction and the same speed relative to the second fan body through the transmission mechanism.

This solution can drive any one fan body to rotate, thereby driving two fan bodies to rotate at the same speed in opposite directions. When working, if one drive mechanism fails, another drive mechanism can be used to ensure the normal operation of the electric counter-rotating ducted fan and improve reliability.

When both the first drive module and the second drive module are working, the transmission mechanism also has a synchronous function. Both fan bodies rotate to drive the linkage gear to rotate, and the upper and lower linkage gears rotate in opposite directions to output force to the transmission gear to drive the transmission gear to rotate. The transmission gear enables the upper and lower fan bodies to rotate synchronously and reversely to ensure the same rotational speed of the two fan bodies.

Claims (10)

1. The utility model provides an electronic contra-rotating ducted fan, its characterized in that includes actuating mechanism (1), first fan body (2), second fan body (3) and drive mechanism, relative setting about first fan body (2) and second fan body (3), actuating mechanism (1) is used for driving second fan body (3) and rotates, two drive ends of drive mechanism are connected with first fan body (2) and second fan body (3) respectively, drive mechanism is used for driving first fan body (2) and rotates with the same speed in opposite direction for second fan body (3) is synchronous under second fan body (3) drive.

2. The electric contra-rotating ducted fan according to claim 1, wherein the transmission mechanism comprises two linkage gears (4) and at least one transmission gear (5), one linkage gear (4) is coaxially connected with the first fan body (2), the other linkage gear (4) is coaxially connected with the second fan body (3), the linkage gear (4) is sleeved on a longitudinal shaft (6) which is longitudinally arranged through a bearing, the transmission gear (5) is positioned between the two linkage gears (4) and is meshed with the two linkage gears (4), and the transmission gear (5) is sleeved on a transverse shaft (7) which is transversely arranged through a bearing.

3. The electric counter-rotating ducted fan according to claim 2, characterized in that the driving mechanism (1) is located between the first fan body (2) and the second fan body (3), one end of the transverse shaft (7) is fixedly connected with the longitudinal shaft (6), and the other end of the transverse shaft (7) is fixedly connected with the driving mechanism (1).

4. The electric contra-rotating ducted fan according to claim 2, wherein the driving mechanism (1) comprises an annular support (9) coaxial with the longitudinal axis (6), the outer wall of the annular support (9) is provided with a plurality of electromagnets (10) along the circumference, the electromagnets (10) are arranged along the longitudinal direction, the second fan body (3) comprises an annular frame body (11) coaxial with the longitudinal axis (6), a plurality of ducted fan blades (12) are uniformly distributed on the inner side of the annular frame body (11), the outer edge of the annular frame body (11) is provided with a plurality of permanent magnets (13) along the circumference, the magnetic poles of one ends of the adjacent permanent magnets (13) facing the electromagnets (10) are opposite, and the permanent magnets (13) on the second fan body (3) are located below the bottom magnetic pole of the electromagnets (10).

5. The electric contra-rotating ducted fan according to claim 2, wherein the driving mechanism (1) comprises an annular support (9) coaxial with the longitudinal axis (6), an annular mounting seat (15) is arranged at the bottom of the annular support (9), the mounting seat (15) is coaxial with the longitudinal axis (6), a plurality of electromagnets (10) are arranged on the inner side wall of the mounting seat (15) along the circumferential direction, the electromagnets (10) are arranged along the radial direction of the mounting seat (15), the second fan body (3) is arranged on the inner side of the mounting seat (15), the second fan body (3) comprises an annular frame body (11) coaxial with the longitudinal axis (6), a plurality of ducted fan blades (12) are uniformly distributed on the inner side of the annular frame body (11), a plurality of permanent magnets (13) are arranged on the outer edge of the annular frame body (11) along the circumference, and the magnetic poles of the adjacent permanent magnets (13) at one end facing the electromagnets (10) are opposite, the permanent magnet (13) on the second fan body (3) is positioned on the inner side of the electromagnet (10).

6. The electric counter-rotating ducted fan according to claim 5 is characterized in that an annular frame sleeve (20) is sleeved outside the annular frame body (11), an annular gap exists between the annular frame sleeve (20) and the annular frame body (11), and the permanent magnet (13) is located in the annular gap.

7. An electric contra-rotating ducted fan is characterized by comprising a driving mechanism (1), a first fan body (2), a second fan body (3) and a transmission mechanism, the first fan body (2) and the second fan body (3) are arranged oppositely up and down, the driving mechanism (1) is positioned between the first fan body (2) and the second fan body (3), the driving mechanism (1) comprises an annular support (9), a first driving module used for driving the first fan body (2) to rotate is arranged at the upper end of the outer wall of the annular support (9), the lower end of the outer wall of the annular bracket (9) is provided with a second driving module for driving the second fan body (3) to rotate, two transmission ends of the transmission mechanism are respectively connected with the first fan body (2) and the second fan body (3), the transmission mechanism can drive the other fan body to rotate at the same speed under the driving of one fan body, and the rotation directions of the two fan bodies are opposite.

8. The electric contra-rotating ducted fan according to claim 7, wherein the first driving module comprises a first mounting seat (18) with a ring shape arranged on the top of the ring-shaped bracket (9), the inner side wall of the first mounting seat (18) is provided with a plurality of first electromagnets (16) along the circumferential direction, the first electromagnets (16) are arranged along the radial direction of the first mounting seat (18), the second driving module comprises a second mounting seat (19) with a ring shape arranged on the top of the ring-shaped bracket (9), the inner side wall of the second mounting seat (19) is provided with a plurality of second electromagnets (17) along the circumferential direction, the second electromagnets (17) are arranged along the radial direction of the second mounting seat (19), the first fan body (2) is arranged inside the first mounting seat (18), and the second fan body (3) is arranged inside the second mounting seat (19), the structure of the first fan body (2) is the same as that of the second fan body (3), and the first fan body and the second fan body both comprise an annular frame body (11), a plurality of duct fan blades (12) are uniformly distributed on the inner side of the annular frame body (11), a plurality of permanent magnets (13) are arranged on the outer edge of the annular frame body (11) along the circumference, one end magnetic poles of adjacent permanent magnets (13) on the first fan body (2) facing a first electromagnet (16) are opposite, one end magnetic poles of adjacent permanent magnets (13) on the second fan body (3) facing a second electromagnet (17) are opposite, the permanent magnets (13) on the first fan body (2) are located on the inner side of the first electromagnet (17), and the permanent magnets (13) on the second fan body (3) are located on the inner side of the second electromagnet (17).

9. The electric counter-rotating ducted fan according to claim 8 is characterized in that an annular frame sleeve (20) is sleeved outside the annular frame body (11), an annular gap exists between the annular frame sleeve (20) and the annular frame body (11), and the permanent magnet (13) is located in the annular gap.

10. The electric contra-rotating ducted fan according to claim 7, wherein the axes of the first fan body (2) and the second fan body (3) are located on the same straight line, the transmission mechanism comprises two linkage gears (4) and at least one transmission gear (5), one linkage gear (4) is coaxially connected with the first fan body (2), the other linkage gear (4) is coaxially connected with the second fan body (3), the linkage gears (4) are sleeved on a longitudinal axis (6) which is longitudinally arranged through bearings, the transmission gear (5) is located between the two linkage gears (4) and is meshed with the two linkage gears (4), and the transmission gear (5) is sleeved on a transverse axis (7) which is transversely arranged through bearings.

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