阅读说明：本技术 磁变距主旋翼系统 (Magnetic variable-pitch main rotor system ) 是由 陈扬 贺亮 赵长春 胡阳修 钱洲元 张翰墨 于 2020-12-01 设计创作，主要内容包括：本发明提供一种磁变距主旋翼系统,包括：主轴系统,包括转动轴,所述转动轴固定于机体上且可沿轴线转动；至少一套旋翼系统,固定于所述转动轴上；每一旋翼系统包括磁变距定子子系统、磁变距转子子系统和摇臂子系统,所述摇臂子系统和所述磁变距转子子系统相连接并安装在所述转动轴外侧,所述磁变距定子子系统安装在所述磁变距转子子系统外侧；所述磁变距定子子系统包括电磁线圈,所述磁变距转子子系统包括永磁体环,所述电磁线圈用于产生交变磁场带动所述永磁体环沿所述转动轴的轴线转动,所述磁变距转子子系统带动所述摇臂子系统转动。本发明可以提高直升机旋翼变距系统可靠性,降低成本。(The present invention provides a magnetic variable-pitch main rotor system, comprising: the main shaft system comprises a rotating shaft, and the rotating shaft is fixed on the machine body and can rotate along the axis; at least one rotor system fixed to the rotating shaft; each rotor system comprises a magnetic variable-pitch stator subsystem, a magnetic variable-pitch rotor subsystem and a rocker arm subsystem, wherein the rocker arm subsystem and the magnetic variable-pitch rotor subsystem are connected and installed on the outer side of the rotating shaft, and the magnetic variable-pitch stator subsystem is installed on the outer side of the magnetic variable-pitch rotor subsystem; the magnetic variable-pitch stator subsystem comprises an electromagnetic coil, the magnetic variable-pitch rotor subsystem comprises a permanent magnet ring, the electromagnetic coil is used for generating an alternating magnetic field to drive the permanent magnet ring to rotate along the axis of the rotating shaft, and the magnetic variable-pitch rotor subsystem drives the rocker arm subsystem to rotate. The invention can improve the reliability of the helicopter rotor pitch-changing system and reduce the cost.)

1. A magnetically variable pitch main rotor system, comprising:

the main shaft system comprises a rotating shaft, and the rotating shaft is fixed on the machine body and can rotate along the axis;

at least one rotor system fixed to the rotating shaft;

each rotor system comprises a magnetic variable-pitch stator subsystem, a magnetic variable-pitch rotor subsystem and a rocker arm subsystem, wherein the rocker arm subsystem and the magnetic variable-pitch rotor subsystem are connected and installed on the outer side of the rotating shaft, and the magnetic variable-pitch stator subsystem is installed on the outer side of the magnetic variable-pitch rotor subsystem;

the magnetic variable-pitch stator subsystem comprises an electromagnetic coil, the magnetic variable-pitch rotor subsystem comprises a permanent magnet ring, the electromagnetic coil is used for generating an alternating magnetic field to drive the permanent magnet ring to rotate along the axis of the rotating shaft, and the magnetic variable-pitch rotor subsystem drives the rocker arm subsystem to rotate.

2. A magnetically-variable-pitch main rotor system according to claim 1, wherein said electromagnetic coil is fixed to said body.

3. A magnetically-variable main rotor system according to claim 1, wherein the ring of permanent magnets is mounted outside and coaxial with the rotating shaft.

4. A magnetically-variable-pitch main rotor system according to claim 1, wherein the rocker subsystem comprises a rotor rocker shaft mounted for rotation along an axis outboard of the rotary shaft.

5. The magnetically variable pitch main rotor system according to claim 4 wherein said magnetically variable pitch rotor subsystem further comprises a bevel gear and a worm gear mechanism, said worm gear mechanism having a worm gear end fixed to said rotor rocker shaft and a worm gear end fixedly connected to said bevel gear, said permanent magnet ring having a bevel gear ring, said bevel gear meshing with said bevel gear ring.

6. A magnetically-variable-pitch main rotor system according to claim 5, wherein there are two sets of said rotor systems, fixed to said rotary shaft in sequence along the axis of said mast;

the meshing direction of the bevel gears and the bevel gear ring in one set of the rotor systems is opposite to the meshing direction of the bevel gears and the bevel gear ring in the other set of the rotor systems.

7. The main rotor system with magnetic variable pitch of claim 5, wherein the main shaft system further comprises a worm mount fixedly connected to the rotating shaft for mounting a worm rod end of the worm gear mechanism, the worm rod end being rotatable in the worm mount.

8. A magnetically-variable-pitch main rotor system according to claim 1, wherein the magnetically-variable-pitch stator subsystem further comprises a magnetic encoder fixed to the body for measuring the phase of the permanent-magnet rings.

Technical Field

The invention relates to the technical field of aircrafts, in particular to a magnetic variable-pitch main rotor system.

Background

The helicopter is widely applied to the fields of military affairs, industry, agriculture, consumption and the like, the endurance time and the load coefficient of the helicopter are important indexes influencing the operation capacity of the helicopter, and the reduction of the structural complexity of the helicopter is an important means for improving the application scene of the helicopter and reducing the cost and the threshold.

At present, a helicopter pitch system is mainly a steering engine and swashplate pitch system. The helicopter attitude control capability sources comprise rotor power and a variable pitch system. The rotor wing displacement of the existing helicopter is realized by driving an inclinator to incline through three steering engines with speed reducers and driving the rotor wing displacement through an upper connecting rod of the inclinator. Because the steering wheel relies on the reduction gear transmission, consequently to the machining requirement high, have clearance and contact between every grade reduction gear, can't realize low noise and anti stifled commentaries on classics. When force and torque are transmitted to the inclinator, the inclinator can perform axial translation and radial surface rotation according to the attitude control requirement, the translation and rotation require bearings with high precision and small friction coefficient, the requirements on processing precision and assembly precision are extremely high, and the contact friction between relative moving parts inevitably causes the abrasion of parts.

Therefore, the helicopter variable total pitch system in the prior art needs to control the processing progress and the assembly precision, also needs to improve the self efficiency, reduce the structural weight and improve the system reliability, and is difficult to reduce the lower cost limit. Therefore, how to simplify the helicopter rotor pitch-changing system to improve the system reliability and reduce the cost is still the problem to be solved in the prior art.

Disclosure of Invention

The invention aims to provide a magnetic variable-pitch main rotor system, which is used for improving the reliability of a helicopter rotor variable-pitch system and reducing the cost.

To achieve the above object, the present invention provides a magnetic variable-pitch main rotor system, comprising:

the main shaft system comprises a rotating shaft, and the rotating shaft is fixed on the machine body and can rotate along the axis;

at least one rotor system fixed to the rotating shaft;

each rotor system comprises a magnetic variable-pitch stator subsystem, a magnetic variable-pitch rotor subsystem and a rocker arm subsystem, wherein the rocker arm subsystem and the magnetic variable-pitch rotor subsystem are connected and installed on the outer side of the rotating shaft, and the magnetic variable-pitch stator subsystem is installed on the outer side of the magnetic variable-pitch rotor subsystem;

the magnetic variable-pitch stator subsystem comprises an electromagnetic coil, the magnetic variable-pitch rotor subsystem comprises a permanent magnet ring, the electromagnetic coil is used for generating an alternating magnetic field to drive the permanent magnet ring to rotate along the axis of the rotating shaft, and the magnetic variable-pitch rotor subsystem drives the rocker arm subsystem to rotate.

Further, in the above-described magnetic pitch main rotor system, the electromagnetic coil is fixed to the body.

Further, in the above-described magneto-variable-pitch main rotor system, the permanent magnet ring is mounted outside the rotating shaft and coaxial with the rotating shaft.

Further, in the above-mentioned magnetic pitch-variable main rotor system, the rocker arm subsystem includes a rotor rocker arm shaft, and the rotor rocker arm shaft is mounted outside the rotating shaft and can rotate along the axis.

Furthermore, in the magnetic variable-pitch main rotor system, the magnetic variable-pitch rotor subsystem further comprises a bevel gear and a worm gear mechanism, a worm gear end of the worm gear mechanism is fixed on the rotor swing arm shaft, a worm gear end is fixedly connected with the bevel gear, the permanent magnet ring is provided with a bevel gear ring, and the bevel gear is meshed with the bevel gear ring.

Furthermore, in the magnetic variable-pitch main rotor system, two sets of rotor systems are arranged and are sequentially fixed on the rotating shaft along the axis of the main shaft;

the meshing direction of the bevel gears and the bevel gear ring in one set of the rotor systems is opposite to the meshing direction of the bevel gears and the bevel gear ring in the other set of the rotor systems.

Further, in the above-mentioned magnetic pitch-variable main rotor system, the main shaft system further includes a worm fixing member, the worm fixing member is fixedly connected to the rotating shaft, and is configured to fix a worm rod end of the worm gear mechanism, and the worm rod end is rotatable in the worm fixing member.

Further, in the above magnetic variable-pitch main rotor system, the magnetic variable-pitch stator subsystem further includes a magnetic encoder, and the magnetic encoder is fixed on the body and used for measuring the phase of the permanent magnet ring.

Compared with the prior art, the invention has the following advantages:

in the magnetic variable-pitch main rotor system, each rotor system adopts a brushless motor consisting of an electromagnetic coil and a permanent magnet ring, the electromagnetic coil is used for generating an alternating magnetic field to drive the permanent magnet ring to rotate along the axis of the rotating shaft, and the magnetic variable-pitch rotor subsystem drives the rocker arm subsystem to rotate. Compared with a complex tilting tray pitch-changing system, the magnetic pitch-changing mode of the brushless motor is adopted, the control is simple and easy, the response is quick, and the application is wide, so that the structure is greatly simplified by using the brushless motor to replace a steering engine, the reliability of the pitch-changing system is improved, and the dead weight and the cost of the structure are reduced. Furthermore, the control precision can be improved by adopting a phase magnetic encoder to carry out variable pitch control.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:

FIG. 1 is a block diagram of a magnetic pitch main rotor system according to an embodiment of the present invention;

fig. 2 is a control transfer diagram of the magnetic pitch main rotor system shown in fig. 1.

Detailed Description

The magnetic variable-pitch main rotor system according to the present invention will be described in further detail with reference to fig. 1 and 2 and the following detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

Referring to fig. 1 and 2, a magnetic pitch main rotor system according to an embodiment of the present invention includes a mast system 100 and at least one rotor system. The spindle system 100 includes a rotating shaft 101, and the rotating shaft 101 is fixed on the machine body 500 and can rotate along an axis.

Fig. 1 and 2 show two sets of rotor systems, rotor system a and rotor system B, respectively. Rotor system A includes magnetic pitch change stator subsystem 200A, magnetic pitch change rotor subsystem 300A and rocking arm subsystem 400A, rocking arm subsystem 400A with magnetic pitch change rotor subsystem 300A is connected and installs the axis of rotation 101 outside, magnetic pitch change stator subsystem 200A installs the magnetic pitch change rotor subsystem 300A outside. Rotor system B includes magnetic pitch change stator subsystem 200B, magnetic pitch change rotor subsystem 300B and rocking arm subsystem 400B, rocking arm subsystem 400B with magnetic pitch change rotor subsystem 300B is connected and installs the axis of rotation 101 outside, magnetic pitch change stator subsystem 200B installs the magnetic pitch change rotor subsystem 300B outside.

The magnetic variable-pitch stator subsystem 200A comprises an electromagnetic coil 201A fixed on the machine body 500, the magnetic variable-pitch rotor subsystem 300A comprises a permanent magnet ring 301A installed on the outer side of the rotating shaft 101 and coaxial with the rotating shaft 101, the electromagnetic coil 201A is used for generating an alternating magnetic field to drive the permanent magnet ring 301A to rotate along the axis of the rotating shaft 101, and the magnetic variable-pitch rotor subsystem 300A drives the rocker arm subsystem 400A to rotate.

The magnetic variable-pitch stator subsystem 200B comprises an electromagnetic coil 201B fixed on the machine body 500, the magnetic variable-pitch rotor subsystem 300B comprises a permanent magnet ring 301B installed on the outer side of the rotating shaft 101 and coaxial with the rotating shaft 101, the electromagnetic coil 201B is used for generating an alternating magnetic field to drive the permanent magnet ring 301B to rotate along the axis of the rotating shaft 101, and the magnetic variable-pitch rotor subsystem 300B drives the rocker arm subsystem 400B to rotate.

The machine body 500 is used for transmitting energy to the spindle system 100, the magnetic variable-pitch stator subsystem 200A and the magnetic variable-pitch stator subsystem 200B, and has measurement data and energy correction capabilities. The machine body 500 provides energy to drive the main shaft system 100 to rotate, the machine body 500 provides energy to drive the magnetic variable-pitch stator subsystem 200A and the magnetic variable-pitch stator subsystem 200B to generate an alternating electromagnetic field, then the alternating electromagnetic field generated by the magnetic variable-pitch stator subsystem 200A drives the magnetic variable-pitch rotor subsystem 300A to rotate, and the alternating electromagnetic field generated by the magnetic variable-pitch stator subsystem 200B drives the magnetic variable-pitch rotor subsystem 300B to rotate. Then, the swing arm system 400A is rotated by the rotation of the magnetic variable-pitch rotor subsystem 300A, and the swing arm system 400B is rotated by the rotation of the magnetic variable-pitch rotor subsystem 300B.

Rocker arm subsystem 400A includes a rotor rocker shaft 401A, rotor rocker shaft 401A being mounted outside of rotary shaft 101 for rotation along the axis of rotor rocker shaft 401A.

Rocker arm subsystem 400B includes a rotor rocker shaft 401B, rotor rocker shaft 401B being mounted outside of rotary shaft 101 for rotation along the axis of rotor rocker shaft 401B.

The magnetic variable-pitch rotor subsystem 300A further comprises a bevel gear 302A and a worm gear mechanism 303A, a turbine end 3031A of the worm gear mechanism 303A is fixed on the rotor swing arm shaft 401A, a worm end 3032A is fixedly connected with the bevel gear 302A, the permanent magnet ring 301A is provided with a bevel gear ring, and the bevel gear 302A is meshed with the bevel gear ring.

The magnetic variable-pitch rotor subsystem 300B further comprises a bevel gear 302B and a worm gear mechanism 303B, a worm gear end 3031B of the worm gear mechanism 303B is fixed on the rotor swing arm shaft 401B, a worm gear end 3032B is fixedly connected with the bevel gear 302B, the permanent magnet ring 301B is provided with a bevel gear ring, and the bevel gear 302B is meshed with the bevel gear ring.

Preferably, the rotor system a and the rotor system B are sequentially fixed on the rotating shaft 101 along the axis of the rotating shaft 101, and the engaging direction of the bevel gear 302A and the bevel gear ring in the rotor system a is opposite to the engaging direction of the bevel gear 302B and the bevel gear ring in the rotor system B. As shown in fig. 1, the bevel gear 302A of the rotor system a is engaged with the bevel gear ring in an upward direction, the bevel gear 302B of the rotor system B is engaged with the bevel gear ring in a downward direction, and the bevel gears of the two rotor systems rotate in opposite directions. Therefore, the height difference of the two bevel gears in the axial direction is reduced, and the dynamic balance degree of the spindle system is improved.

The spindle system 100 further includes a worm fixing member 102 fixedly connected to the rotating shaft 101 for fixing the worm ends 3032A and 3032B, and the worm rod ends 3032A and 3032B can rotate in the worm fixing member 102 without affecting the torque transmission of the two worm and gear mechanisms 303A and 303B.

Preferably, the magnetic variable-pitch stator subsystem 200A further includes a magnetic encoder 202A fixed on the machine body 500 for measuring the phase of the permanent magnet ring 301A. The magnetic variable-pitch stator subsystem 200B further includes a magnetic encoder 202B fixed on the machine body 500 for measuring the phase of the permanent magnet ring 301B.

Referring to fig. 2, the rotor collective pitch control process of the helicopter using the magnetic pitch main rotor system shown in fig. 1 is as follows:

the machine body 500 is started, the spindle system 100 supplies power to the spindle system A, the electromagnetic coil 201A supplies power to the spindle system B, the electromagnetic coil 201B supplies power to the spindle system C, the magnetic encoder 202A supplies power to the spindle system D, and the magnetic encoder 202B supplies power to the spindle system E;

the electromagnetic coil 201A provides a magnetic field A to the permanent magnet ring 301A, and the magnetic encoder 201A measures the phase A of the permanent magnet ring 301A; the electromagnetic coil 201B provides a magnetic field B to the permanent magnet ring 301B, and the magnetic encoder 201B measures the phase B of the permanent magnet ring 301B;

the permanent magnet ring 301A transmits the phase a to the bevel gear 302A; the permanent magnet ring 301B transmits phase B to the bevel gear 302B;

the bevel gear 302A converts the phase A into an angle A, and transmits the angle A to the worm gear mechanism 303A; the bevel gear 302B converts the phase B into an angle B, and transmits the angle B to the worm gear mechanism 303B;

the worm gear mechanism 303A converts the angle a into an angle C, which is transmitted to the rotor rocker shaft 401A; the worm gear mechanism 303B converts the angle B into an angle D, which is transmitted to the rotor rocker shaft 401B;

the rotor rocker shaft 401A converts the angle C into data a, and transmits the data a to the airframe 500; the rotor rocker shaft 401B converts the angle D into data B and transmits the data B to the airframe 500;

the body 500 judges the size of the data A as Y/N, Y reduces the energy supply B, and N increases the energy supply B; the body 500 determines the size of data B as Y/N, Y decreasing energy supply C and N increasing energy supply C.

It can be understood that, for the rocker arm system a, according to the relation between the aircraft angle of attack and the lift force, the angle C causes the lift force of the aircraft to change, thereby causing the attitude of the aircraft to change, and the attitude change becomes control decision data a according to an internal algorithm formula. The same is true for rocker arm system B.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it is to be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.