A rotor axial force control device and system

Abstract

The present disclosure provides a rotor axial force control device and system, the device comprising: a control component, a power generation component, a coil component, a rotating speed sensor and a current sensor, the bearing, the power generation component and the coil component are sleeved on the engine shaft, the signal output end of the rotating speed sensor and the signal output end of the current sensor are both signal connected with the signal receiving end of the control component, and the signal output end of the control component is signal connected with the signal receiving end of the coil component; the control component is used for determining the control parameter of the target axial electromagnetic force based on the rotating speed signal of the engine shaft and the preset axial force, and adjusting the electromagnetic control parameter of the coil component if the control parameter of the current axial electromagnetic force determined based on the current signal of the coil component does not meet the control parameter of the target axial electromagnetic force. The device provided by the present disclosure can generate the current axial electromagnetic force by the control component controlling the coil component under the action of the power generation component, so as to realize the active control of the rotor axial force.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of engines, and in particular to a rotor axial force control device and system. BACKGROUND

[0002] The rotor axial force of an aero-engine finally acts on a bearing, and a ball bearing is an important component of the aero-engine, and its reliability is crucial. The rotor axial force acting on the ball bearing cannot exceed the maximum design value or be lower than the minimum limit value, so as to avoid excessive wear of the bearing and bearing sliding, impact damage, etc. Therefore, accurate calculation of the bearing axial force and setting of a reasonable and reliable rotor axial force adjustment means are particularly important for enhancing the reliability of the aero-engine.

[0003] At present, a contact type axial force electromagnetic adjustment system can effectively meet the active adjustment demand of the aero-engine axial force, but the electrical conduction between the stator and the rotor is inevitable. Moreover, due to the high speed of the aero-engine and the harsh and changeable internal working environment, the reliability and durability of the electric lead become a big challenge. SUMMARY

[0004] The present disclosure aims to provide a rotor axial force control device and system for actively controlling the rotor axial force when the power supply of a power generation assembly is provided, so as to ensure that the bearing can work stably and efficiently, thereby prolonging the service life of the bearing.

[0005] According to an aspect of the present disclosure, a rotor axial force control device is provided, the bearing being arranged on an engine shaft, the rotor axial force control device comprising: a control assembly, a power generation assembly, a coil assembly, a speed sensor and a current sensor, the power generation assembly and the coil assembly being arranged on the engine shaft, the coil assembly being configured to generate an axial electromagnetic force for controlling the rotor axial force when the power generation assembly is powered;

[0006] A signal receiving end of the speed sensor is signal connected with a signal output end of the engine shaft, a signal receiving end of the current sensor is signal connected with a signal output end of the coil assembly, and a signal output end of the speed sensor and a signal output end of the current sensor are both signal connected with a signal receiving end of the control assembly;

[0007] The control assembly is configured to acquire a speed signal of the engine shaft and a current signal of the coil assembly during engine operation, to determine a current axial force based on the speed signal of the engine shaft, to determine a control parameter of a current axial electromagnetic force based on the current signal of the coil assembly, and to determine a control parameter of a target axial electromagnetic force based on the current axial force and a preset axial force;

[0008] The signal output end of the control component is in signal connection with the signal receiving end of the coil component, and the control component is further configured to, if the control parameter of the current axial electromagnetic force does not meet the control parameter of the target axial electromagnetic force, adjust the electromagnetic control parameter of the coil component based on the control parameter of the target axial electromagnetic force and the control parameter of the current axial electromagnetic force, and the electromagnetic control parameter is used to control the axial electromagnetic force generated by the coil component.

[0009] According to another aspect of the present disclosure, a rotor axial force control system is provided, which comprises an engine shaft, a bearing and a rotor axial force control device, the rotor axial force control device being the rotor axial force control device described in the example embodiments of the present disclosure, the bearing is arranged on the engine shaft, and the power generation component and the coil component included in the rotor axial force control device are arranged on the engine shaft.

[0010] In the one or more technical solutions provided in the example embodiments of the present disclosure, the bearing sleeve is arranged on the engine shaft, and the rotor axial force control device comprises a control component, a power generation component, a coil component, a rotational speed sensor and a current sensor, the power generation component and the coil component are arranged on the engine shaft, and the coil component is used to generate an axial electromagnetic force for controlling the rotor axial force when the power generation component is powered. The signal receiving end of the rotational speed sensor is in signal connection with the signal output end of the engine shaft, so that the rotational speed sensor can be used to collect the rotational speed signal of the engine shaft during the operation of the rotor; the signal receiving end of the current sensor is in signal connection with the signal output end of the coil component, so that the current sensor can be used to collect the current signal of the coil component during the operation of the rotor. The signal output end of the rotational speed sensor and the signal output end of the current sensor are both in signal connection with the signal receiving end of the control component, so that the control component can obtain the rotational speed signal of the engine shaft from the rotational speed sensor and the current signal of the coil component from the current sensor during the operation of the rotor. Then the control component can be used to determine the current axial force based on the rotational speed signal of the engine shaft, determine the control parameter of the current axial electromagnetic force based on the current signal of the coil component, and determine the control parameter of the target axial electromagnetic force based on the current axial force and the preset axial force. That is, the rotor axial force during the operation of the bearing can include the current axial force and the current axial electromagnetic force, and therefore the rotor axial force can be controlled by using the control component to control the current axial electromagnetic force generated by the coil component.

[0011] Therefore, the signal output end of the control assembly is signal connected with the signal receiving end of the coil assembly, and the control assembly can also be used to adjust the electromagnetic control parameter of the coil assembly based on the control parameter of the target axial electromagnetic force and the control parameter of the current axial electromagnetic force if the control parameter of the current axial electromagnetic force does not meet the control parameter of the target axial electromagnetic force, so as to control the current axial electromagnetic force generated by the coil assembly through the control assembly, control the rotor axial force by using the adjustable current axial electromagnetic force, make the rotor axial force meet the preset axial force, and realize real-time active control of the rotor axial force under the action of the power generation assembly, thereby prolonging the service life of the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0012] In the following description of the exemplary embodiments in conjunction with the accompanying drawings, more details, features and advantages of the present disclosure are disclosed, in which:

[0013] Figure 1 A schematic block diagram of a rotor axial force control device of an exemplary embodiment of the present disclosure is shown;

[0014] Figure 2 A partial structure schematic diagram of a rotor axial force control device of an exemplary embodiment of the present disclosure is shown;

[0015] Figure 3 A structure schematic diagram of a rotor axial force control system of an exemplary embodiment of the present disclosure is shown.

[0016] LIST OF REFERENCE NUMERALS

[0017] 110-control assembly, 111-controller, 112-voltage regulator, 120-coil assembly, 121-rotating coil, 122-static coil, 130-rotational speed sensor, 140-current sensor, 210-magnetic guide mounting, 220-rotating coil, 221-first sleeve, 222-first coil, 230-static coil, 231-second sleeve, 232-second coil, 310-engine shaft, 320-bearing, 330-coil assembly, 331-rotating coil, 332-static coil, 340-engine shell, 350-first support structure, 360-second support structure, 370-power generation assembly, 371-magnetic pole structure. DETAILED DESCRIPTION

[0018] Embodiments of the present disclosure will be described in more detail by referring to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms, and should not be interpreted as being limited to the embodiments set forth herein, but rather, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes, and are not intended to limit the scope of protection of the present disclosure.

[0019] It should be understood that each step recited in the method embodiments of the present disclosure can be performed in different orders and / or in parallel. In addition, the method embodiments can include additional steps and / or omit performing the steps shown. The scope of the present disclosure is not limited in this respect.

[0020] The term "comprising" and variations thereof as used herein are used inclusively, i.e., "comprising but not limited to." The term "based on" is "based at least in part on." The term "one embodiment" means "at least one embodiment." The term "another embodiment" means "at least one additional embodiment." The term "some embodiments" means "at least some embodiments." Related definitions are given throughout the detailed description. It should be noted that the concepts mentioned in the present disclosure are merely used for distinguishing different apparatuses, modules or units, and are not intended to limit the functions of the apparatuses, modules or units.

[0021] It should be noted that the terms "one", "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that "one or more" should be understood unless otherwise explicitly indicated in the context.

[0022] The names of the messages or information exchanged between the plurality of apparatuses in the embodiments of the present disclosure are merely used for illustrative purposes, and are not intended to limit the scope of the messages or information.

[0023] An aero-engine mainly consists of an inlet duct, a compressor, a combustion chamber, a high-pressure turbine and a power turbine. The compressor and the high-pressure turbine are connected by a high-pressure rotor shaft and are driven by the high-pressure turbine. The power turbine and the load are connected by a low-pressure rotor shaft and are driven by the power turbine. In this process, the compressor blades and the turbine blades generate different axial forces. The transmission shaft is connected with the bearing, and finally the axial force acts on the bearing.

[0024] Ball bearings are important components of aero-engines, and their reliability is crucial. The rotor axial force acting on the ball bearing cannot exceed the maximum axial force design value, nor can it be lower than the minimum bearing force limit value, so as to avoid excessive wear and bearing sliding, impact damage, etc. Therefore, accurate calculation of the rotor axial force and setting of a reasonable and reliable rotor axial force adjustment means are particularly important for enhancing the reliability of aero-engines.

[0025] At present, the rotor axial force adjustment modes include mutual offset of compressor rotor and turbine rotor axial force, internal cavity structure optimization, additional bleed air adjustment, and strengthened bearing, and still have certain defects. For example, the axial force mutual offset and internal cavity structure optimization cannot realize active control, and still have certain limitations under complex working conditions; the bleed air adjustment structure design is complex and increases the weight of the whole machine, and the bleed air from the main flow passage reduces the engine efficiency; the strengthened bearing can ensure relatively optimal reliability, but the design is difficult, and the heat dissipation required by passive bearing of excessive axial force is large, which is not conducive to good engine thermal management.

[0026] The working conditions of an aero-engine are complex and changeable, the passive axial force adjustment system is difficult to meet the full envelope requirement, and it is particularly urgent to realize active adjustment of the rotor axial force under the premise of considering the aero-engine efficiency and weight, and to have excellent response speed, good followability and even certain prediction ability.

[0027] Moreover, the axial force electromagnetic adjustment system in the prior art can effectively meet the active adjustment requirement of the aero-engine axial force, but the electrical conduction between the stator and the rotor is inevitable, and since the aero-engine has high speed and a harsh and changeable internal working environment, the reliability and durability of the electric lead become a big challenge.

[0028] Based on the above problems, the present application provides a rotor axial force control device and system, which can control the current axial electromagnetic force generated by the coil assembly under the action of the power generation assembly through the control assembly, control the rotor axial force by using the adjustable current axial electromagnetic force, so that the rotor axial force can meet the preset axial force, realize real-time active control of the rotor axial force, and prolong the service life of the bearing.

[0029] In the rotor axial force control device provided in the present disclosure, the bearing is arranged on the engine shaft. Figure 1 A schematic block diagram of the rotor axial force control device of the exemplary embodiment of the present disclosure is shown. As shown in the figure, Figure 1 The rotor axial force control device of the exemplary embodiment of the present disclosure includes a control assembly 110, a power generation assembly 150, a coil assembly 120, a speed sensor 130, and a current sensor 140. The power generation assembly 150 and the coil assembly 120 are arranged on the engine shaft, and the coil assembly 120 is used to generate axial electromagnetic force for controlling the rotor axial force under the power supply of the power generation assembly.

[0030] The signal receiving end of the speed sensor 130 is signal connected with the signal output end of the engine shaft, and the signal receiving end of the current sensor 140 is signal connected with the signal output end of the coil assembly; the signal output end of the speed sensor 130 and the signal output end of the current sensor 140 are both signal connected with the signal receiving end of the control assembly 110.

[0031] In implementation, the rotation speed sensor 130 can be used to collect the rotation speed signal of the engine shaft in real time during the operation of the rotor, and transmit the rotation speed signal of the engine shaft to the control component 110 through the signal output end of the rotation speed sensor 130 and the signal receiving end of the control component 110. The current sensor 140 can be used to collect the current signal of the coil assembly in real time during the operation of the rotor, and transmit the current signal of the coil assembly to the control component 110 through the signal output end of the current sensor 140 and the signal receiving end of the control component 110.

[0032] The control component 110 can be used to obtain the rotation speed signal of the engine shaft and the current signal of the coil assembly during the operation of the rotor, determine the current axial force based on the rotation speed signal of the engine shaft, determine the control parameter of the current axial electromagnetic force based on the current signal of the coil assembly, and determine the control parameter of the target axial electromagnetic force based on the current axial force and the preset axial force.

[0033] For example, the control component 110 can be used to determine the current axial force corresponding to the current rotation speed of the engine shaft based on the pre-constructed mapping relationship between the rotation speed of the rotor and the axial force. The mapping relationship can be determined based on the rotation speed and axial force relationship characteristic curve, or determined based on the function relationship between the rotation speed and the axial force. The specific determination is based on the actual application scenario, which is not limited here.

[0034] The preset axial force is essentially the target rotor axial force required for the bearing to work stably and efficiently under the current working condition. The size is determined according to the actual situation, which is not limited here. When the current axial force does not match the preset axial force, the control component 110 can be used to determine the control parameter of the target axial electromagnetic force based on the current axial force and the preset axial force, so that the current axial force can meet the requirement of the preset axial force under the action of the target axial electromagnetic force defined by the control parameter of the target axial electromagnetic force.

[0035] The signal output end of the control component 110 is connected with the signal receiving end of the coil assembly 120. If the control parameter of the current axial electromagnetic force does not meet the control parameter of the target axial electromagnetic force, the control component 110 can be used to adjust the electromagnetic control parameter of the coil assembly based on the control parameter of the target axial electromagnetic force and the control parameter of the current axial electromagnetic force. The electromagnetic control parameter is used to control the current axial electromagnetic force generated by the coil assembly.

[0036] The control parameter of the current axial electromagnetic force is related to an electromagnetic control parameter of the coil assembly. When the electromagnetic control parameter of the coil assembly is determined, the control parameter of the current axial electromagnetic force is also determined. For example, the control assembly can be used to determine whether the control parameter of the current axial electromagnetic force matches the control parameter of the target axial electromagnetic force. If the control parameter of the current axial electromagnetic force does not meet the control parameter of the target axial electromagnetic force, the electromagnetic control parameter of the coil assembly is adjusted based on the control parameter of the target axial electromagnetic force and the control parameter of the current axial electromagnetic force, so that the current axial electromagnetic force generated by the coil assembly is adjusted by using the adjusted electromagnetic control parameter, and then the active control of the rotor axial force is realized by using the adjustable current axial electromagnetic force, so that the rotor axial force can always meet the requirement of the preset axial force, the bearing can work in real time and efficiently and stably, the thermal load of the bearing component is effectively reduced, and the service life of the bearing is prolonged.

[0037] It can be seen that the device of the example embodiment of the present disclosure can control the current axial electromagnetic force generated by the coil assembly by the control assembly, control the rotor axial force by using the current axial electromagnetic force, so that the rotor axial force can meet the preset axial force, realize the real-time active control of the rotor axial force under the action of the power generation assembly, and prolong the service life of the bearing.

[0038] In an optional manner, the target axial electromagnetic force of the example embodiment of the present disclosure can meet F' = F - F Z , where F' represents the target axial electromagnetic force, F represents the current axial force, and F Z represents the preset axial force.

[0039] The above target axial electromagnetic force can be a vector parameter with a direction. The strength of the target axial electromagnetic force can be the absolute value of the difference between the current axial force and the preset axial force. The direction of the target axial electromagnetic force can be determined based on the positive or negative of the difference between the current axial force and the preset axial force.

[0040] In an optional manner, as Figure 1 shown, the power generation assembly 150 of the example embodiment of the present disclosure includes a power generation coil 151, a magnetic pole structure 152 formed on an inner wall of an engine housing, and a rectifier 150. The power generation coil 151 and the rectifier 153 are arranged on the engine shaft. The magnetic pole structure 152 is opposite to the power generation coil 151, and there is an air gap between the magnetic pole structure 152 and the power generation coil 151.

[0041] The coil assembly 120 may include a rotating coil 121 and a static coil 122. The generator assembly 150 is electrically connected to the rotating coil 121. The generator assembly 150, the rotating coil 121, and the static coil 122 are sequentially arranged along the axial direction of the engine shaft. The generator coil 151, the rectifier 153, and the rotating coil 121 are sequentially arranged along the axial direction of the engine shaft. The magnetic pole structure 152 may be an electromagnet or other magnetic pole material, which is not specifically limited herein.

[0042] In specific implementation, since the generating coil 151 and the rectifier 153 are wound on the engine shaft, there is an air gap between the magnetic pole structure 152 and the generating coil 151. Therefore, during the operation of the bearing, the generating coil 151 rotates with the engine shaft, and the generating coil 151 cuts the magnetic field to generate an alternating electromotive force, which generates an induced current on the rotating coil 121 after passing through the rectifier 153, thereby generating an axial electromagnetic force between the rotating coil 121 and the static coil 122 to control the axial force of the rotor.

[0043] It can be seen that the rotor axial force control device provided by the exemplary embodiment of the present disclosure can power the rotating coil through the power generation component, without the need to introduce current to the rotating coil through the induction device. Therefore, it solves the reliability and durability problems of the induction device caused by the high engine speed and the harsh and changeable internal working environment in the prior art.

[0044] In an alternative approach, such as Figure 1 As shown, the control component 110 of the exemplary embodiment of the present disclosure may include a controller 111 and a transformer-regulator 112, the signal receiving end of the controller 111 being signal-connected to the signal output end of the speed sensor 130 and the signal output end of the current sensor 140, respectively, the signal receiving end of the current sensor 140 being signal-connected to the signal output end of the static coil 122, and the signal output end of the controller 111 being signal-connected to the signal receiving end of the transformer-regulator 112.

[0045] In specific implementation, the exemplary embodiment of the present disclosure can communicate with the signal output end of the speed sensor 130 and the signal output end of the current sensor 140 respectively through the signal receiving end of the controller 111, receive the speed signal of the engine shaft from the speed sensor 130 and the current signal of the static coil from the current sensor 140, and then, the controller 111 is also used to determine the electromagnetic control parameters of the coil assembly based on the speed signal of the engine shaft and the current signal of the static coil, and then send the electromagnetic control parameters of the coil assembly to the transformer regulator 112.

[0046] Exemplarily, the control parameter of the exemplary embodiments of the present disclosure can include an intensity control parameter. The intensity control parameter of the current axial electromagnetic force can be determined based on the current intensity of the static coil, and the intensity of the current axial electromagnetic force is positively correlated with the current intensity of the static coil. The greater the current intensity of the static coil, the greater the intensity of the current axial electromagnetic force generated between the rotating coil and the static coil; otherwise, the smaller the intensity of the current axial electromagnetic force.

[0047] The calculation formula of the current axial electromagnetic force in the exemplary embodiments of the present disclosure can be expressed as:

[0048] F c = a * |f(I a , I b , r a , r b , l a , l b , l ab , n a , n b , μ)|

[0049] Wherein, F c represents the current axial electromagnetic force, a represents the direction control parameter of the current axial electromagnetic force, and takes the value of 1 or -1. When a takes the value of 1, the direction of the current axial electromagnetic force defined by the direction control parameter of the current axial electromagnetic force is the positive direction; when a takes the value of -1, the direction of the current axial electromagnetic force defined by the direction control parameter of the current axial electromagnetic force is the negative direction.

[0050] |f(I a , I b , r a , r b , l a , l b , l ab , n a , n b , μ)| represents the intensity of the current axial electromagnetic force, which can be determined based on the functional relationship of I a , I b , r a , r b , l a , l b , l ab , n a , n b and μ. I a represents the current intensity of the static coil, I b represents the current intensity of the rotating coil, r a represents the radius of the static coil, r b represents the radius of the rotating coil, l a represents the width of the static coil, lb Indicates the width of the rotating coil, l ab Indicates the distance between the static coil and the rotating coil, n a Indicates the number of turns of the static coil, n b Indicates the number of turns of the rotating coil, μ indicates the equivalent magnetic permeability. a Except for the dynamic value, the other independent variables are fixed values. b It can be determined by the controller based on the speed signal of the engine shaft.

[0051] For example, the control component can be used to determine the generated voltage of the rotating coil corresponding to the current speed of the engine shaft based on a pre-established mapping relationship between the rotor speed and the generated voltage. This mapping relationship can be determined based on a characteristic curve of the relationship between speed and generated voltage, or based on a functional relationship between speed and generated voltage, depending on the actual application scenario and not specifically limited here. After determining the generated voltage of the rotating coil, since the resistance of the rotating coil is known, the controller is further configured to determine the current intensity of the rotating coil based on the generated voltage and resistance.

[0052] In an optional manner, the rotor axial force control device of the exemplary embodiment of the present disclosure may also include a DC power supply (not shown in the figure), the power input end of the transformer regulator 112 is electrically connected to the power output end of the DC power supply, and the power output end of the transformer regulator 112 is electrically connected to the static coil 122.

[0053] In a specific implementation, the current entering the static coil first flows through the transformer regulator. The controller of the exemplary embodiment of the present disclosure can control the current intensity in the transformer regulator by controlling the input voltage of the transformer regulator, thereby controlling the current intensity of the rotating coil.

[0054] In an optional manner, the control parameters of the exemplary embodiment of the present disclosure may include an intensity control parameter, and the electromagnetic control parameter may include an input voltage parameter of the static coil. The input voltage parameter of the static coil can be used to control the intensity of the current axial electromagnetic force. In this case, the controller 111 can be used to adjust the input voltage parameter of the static coil based on the intensity control parameter of the target axial electromagnetic force and the intensity control parameter of the current axial electromagnetic force. Then, the controller 111 communicates with the signal receiving end of the voltage transformer 112 via the signal output end of the controller 111. The controller 111 transmits the input voltage parameter of the static coil to the voltage transformer 112. The voltage transformer 112 can be used to control the input voltage of the static coil based on the input voltage parameter of the static coil.

[0055] If the intensity control parameter of the current axial electromagnetic force does not satisfy the intensity control parameter of the target axial electromagnetic force, the controller 111 is configured to adjust the input voltage parameter of the static coil to an input voltage parameter satisfying the intensity control parameter of the target axial electromagnetic force based on the intensity control parameter of the target axial electromagnetic force and the intensity control parameter of the current axial electromagnetic force, and send the input voltage parameter of the static coil to the voltage regulation device 112, and the voltage regulation device 112 controls the input voltage of the static coil based on the input voltage parameter of the static coil. At this time, the current axial electromagnetic force between the rotating coil and the static coil can be adjusted to an intensity satisfying the intensity of the target axial electromagnetic force, and the current axial electromagnetic force can be used to offset or increase a part of the current axial force to achieve active control of the rotor axial force.

[0056] In actual application, the controller 111 can also be configured to determine a voltage duty cycle parameter based on the intensity control parameter of the target axial electromagnetic force and the intensity control parameter of the current axial electromagnetic force, and adjust the input voltage parameter of the static coil based on the voltage duty cycle parameter.

[0057] The above-mentioned voltage duty cycle parameter can control the determination of the input voltage of the static coil. The controller 111 can be configured to determine the difference between the intensity of the current axial electromagnetic force and the intensity of the target axial electromagnetic force based on the intensity control parameter of the current axial electromagnetic force and the intensity control parameter of the target axial electromagnetic force; if the difference between the intensity of the current axial electromagnetic force and the intensity of the target axial electromagnetic force is greater than a preset difference, the input voltage of the static coil is reduced based on the voltage duty cycle parameter; if the difference between the intensity of the current axial electromagnetic force and the intensity of the target axial electromagnetic force is less than the preset difference, the input voltage of the static coil is increased based on the voltage duty cycle parameter.

[0058] The above-mentioned preset difference can be determined according to actual needs. For example, when the preset difference is zero, if the difference between the intensity of the current axial electromagnetic force and the intensity of the target axial electromagnetic force is greater than zero, it means that the intensity of the current axial electromagnetic force is greater than the intensity of the target axial electromagnetic force, at this time, the input voltage of the static coil can be reduced based on the voltage duty cycle parameter to reduce the intensity of the current axial electromagnetic force; if the difference between the intensity of the current axial electromagnetic force and the intensity of the target axial electromagnetic force is less than zero, it means that the intensity of the current axial electromagnetic force is less than the intensity of the target axial electromagnetic force, at this time, the input voltage of the static coil is increased based on the voltage duty cycle parameter to increase the intensity of the current axial electromagnetic force.

[0059] In an optional manner, Figure 2 A partial structure schematic diagram of a rotor axial force control device of an example embodiment of the present disclosure is shown. As shown in FIG. 1, the rotor axial force control device comprises a rotating coil 101, a static coil 102, a voltage regulation device 112, a controller 111, and a power supply 103. Figure 2As shown, the rotor axial force control device of the exemplary embodiment of the present disclosure can further include a magnetically conductive mounting member 210 for mounting on the engine shaft, the rotating coil 220 can include a first sleeve 221 and a first coil 222 wound on the first sleeve 221, and the first sleeve 221 is fixed on the magnetically conductive mounting member 210; the static coil 230 can include a second sleeve 231 and a second coil 232 wound on the second sleeve 231, and the second sleeve 231 is rotatably sleeved on the magnetically conductive mounting member 210. The magnetically conductive mounting member can be an electromagnet, silicon steel, soft iron, or other magnetically conductive materials, which are not specifically limited here.

[0060] The present disclosure provides a rotor axial force control system, Figure 3 The structural schematic diagram of the rotor axial force control system of the exemplary embodiment of the present disclosure is shown. As shown in the figure, Figure 3 As shown, the rotor axial force control system of the exemplary embodiment of the present disclosure can include an engine shaft 310, a bearing 320, and a rotor axial force control device (only the power generation assembly 370 and the coil assembly 330 are shown in the figure), the rotor axial force control device is the rotor axial force control device of the exemplary embodiment of the present disclosure, the bearing 320 is arranged on the engine shaft 310, and the power generation assembly 370 and the coil assembly 330 included in the rotor axial force control device are arranged on the engine shaft 310.

[0061] In an alternative way, the coil assembly 330 of the exemplary embodiment of the present disclosure can include a rotating coil 331 and a static coil 332, and the rotor axial force control system can further include an engine housing 340 and a first support structure 350, the first support structure is arranged on the inner wall of the engine housing 340, and the magnetic pole structure 371 is arranged on the surface of the first support structure 350 away from the engine housing 340.

[0062] The rotor axial force control system of the exemplary embodiment of the present disclosure can further include a second support structure 360, and the static coil 332 is fixedly connected to the inner wall of the engine housing 340 through the second support structure 360.

[0063] It can be seen that in the rotor axial force control system of the exemplary embodiment of the present disclosure, the rotation speed of the engine shaft and the current of the coil assembly can be transmitted by the control assembly in real time, without changing the engine main body structure, and without the need to set sensors on the rotating parts or the connection, facilitating installation, being able to meet the engine full envelope requirement, having the characteristics of simple structure and light weight, and effectively reducing the thermal load of the bearing and other components through real-time active control of the rotor axial force, prolonging the service life while simplifying the thermal management system design. The technical problems of the prior art that the engine axial force unloading system has a complex structure, a large mass, a low efficiency, is not easy to realize active control, is difficult to meet the engine full envelope requirement, the bearing has a large and variable load, has a large heat dissipation, reduces reliability, and is difficult to realize good engine thermal management are solved.

[0064] One or more technical solutions provided in the exemplary embodiment of the present disclosure are that the bearing sleeve is arranged on the engine shaft, and the rotor axial force control device comprises a control assembly, a power generation assembly, a coil assembly, a rotation speed sensor, and a current sensor. The power generation assembly and the coil assembly are arranged on the engine shaft, and the coil assembly is used to generate an axial electromagnetic force for controlling the rotor axial force in the case of power supply of the power generation assembly. The signal receiving end of the rotation speed sensor is signal connected with the signal output end of the engine shaft, so that the rotation speed sensor can be used to collect the rotation speed signal of the engine shaft in the rotor running process. The signal receiving end of the current sensor is signal connected with the signal output end of the coil assembly, so that the current sensor can be used to collect the current signal of the coil assembly in the rotor running process. The signal output end of the rotation speed sensor and the signal output end of the current sensor are both signal connected with the signal receiving end of the control assembly, so that the control assembly can acquire the rotation speed signal of the engine shaft from the rotation speed sensor and the current signal of the coil assembly from the current sensor in the rotor running process. Then the control assembly can be used to determine the current axial force based on the rotation speed signal of the engine shaft, determine the control parameter of the current axial electromagnetic force based on the current signal of the coil assembly, and determine the control parameter of the target axial electromagnetic force based on the current axial force and the preset axial force. That is, the rotor axial force in the rotor running process can include the current axial force and the current axial electromagnetic force, and therefore the current axial electromagnetic force generated by the coil assembly can be controlled by the control assembly to control the rotor axial force.

[0065] Based on this, the signal output end of the control component is signal connected with the signal receiving end of the coil component, the control component can also be used to adjust the electromagnetic control parameter of the coil component based on the control parameter of the target axial electromagnetic force and the control parameter of the current axial electromagnetic force if the control parameter of the current axial electromagnetic force does not meet the control parameter of the target axial electromagnetic force, control the current axial electromagnetic force generated by the coil component through the control component, control the rotor axial force by using the adjustable current axial electromagnetic force, so that the rotor axial force can meet the preset axial force, realize the real-time active control of the rotor axial force under the action of the power generation component, and prolong the service life of the bearing.

[0066] Although the present disclosure has been described in conjunction with specific features and embodiments thereof, it is evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the disclosure. Accordingly, the description and drawings are to be regarded as illustrative in nature and are not to be regarded as limiting the scope of the disclosure. It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the spirit or scope of the disclosure. Thus, it is intended that the present disclosure cover modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.

Claims

1. A device for controlling the axial force of a rotor, characterized in that: The bearing sleeve is mounted on the engine shaft. The rotor axial force control device includes: a control component, a power generation component, a coil component, a speed sensor, and a current sensor. The power generation component and the coil component are both mounted on the engine shaft. The coil component is used to generate an axial electromagnetic force to control the rotor axial force when the power generation component supplies power. The signal receiving end of the speed sensor is signal-connected to the signal output end of the engine shaft, the signal receiving end of the current sensor is signal-connected to the signal output end of the coil assembly, and the signal output end of the speed sensor and the signal output end of the current sensor are both signal-connected to the signal receiving end of the control assembly; The control component is used to obtain a speed signal of the engine shaft and a current signal of the coil assembly during engine operation, determine a current axial force based on the speed signal of the engine shaft, determine a control parameter of the current axial electromagnetic force based on the current signal of the coil assembly, and determine a control parameter of a target axial electromagnetic force based on the current axial force and a preset axial force; The signal output end of the control component is signal-connected to the signal receiving end of the coil component. The control component is further configured to adjust the electromagnetic control parameters of the coil component based on the control parameters of the target axial electromagnetic force and the control parameters of the current axial electromagnetic force if the control parameters of the current axial electromagnetic force do not meet the control parameters of the target axial electromagnetic force. The electromagnetic control parameters are used to control the axial electromagnetic force generated by the coil component. The target axial electromagnetic force satisfies F'=FF Z , where F' represents the target axial electromagnetic force, F represents the current axial force, and F Z Indicates the preset axial force under the current working condition; The power generation assembly includes a power generation coil, a magnetic pole structure formed on the inner wall of the engine housing, and a rectifier. The power generation coil and the rectifier are wound on the engine shaft. The magnetic pole structure is opposite to the power generation coil, and an air gap is between the magnetic pole structure and the power generation coil. The coil assembly includes a static coil and a rotating coil, the power generation assembly is electrically connected to the rotating coil, the power generation assembly, the rotating coil and the static coil are distributed in sequence along the axial direction of the engine shaft, and the power generation coil, the rectifier and the rotating coil are distributed in sequence along the axial direction of the engine shaft.

2. The rotor axial force control device according to claim 1, characterized in that: The control component includes a controller and a voltage regulator; The signal receiving end of the controller is signal-connected to the signal output end of the speed sensor and the signal output end of the current sensor respectively, the signal receiving end of the current sensor is signal-connected to the signal output end of the static coil, and the signal output end of the controller is signal-connected to the signal receiving end of the transformer regulator.

3. The rotor axial force control device according to claim 2, characterized in that: The control device further includes a DC power supply, the power input end of the voltage transformer regulator is electrically connected to the power output end of the DC power supply, and the power output end of the voltage transformer regulator is electrically connected to the static coil.

4. The rotor axial force control device according to claim 2, characterized in that: The control parameters include intensity control parameters, and the electromagnetic control parameters include input voltage parameters of the static coil; The controller is configured to adjust an input voltage parameter of the static coil based on the intensity control parameter of the target axial electromagnetic force and the intensity control parameter of the current axial electromagnetic force; The voltage transformer regulator is used to control the input voltage of the static coil based on the input voltage parameter of the static coil.

5. The rotor axial force control device according to claim 4, characterized in that: The controller is further configured to determine a voltage duty cycle parameter based on the target axial electromagnetic force intensity control parameter and the current axial electromagnetic force intensity control parameter, and adjust an input voltage parameter of the static coil based on the voltage duty cycle parameter.

6. The rotor axial force control device according to any one of claims 1 to 5, characterized in that: The rotor axial force control device also includes a magnetic mounting part for being installed on the engine shaft. The rotating coil includes a first sleeve and a first coil wound on the first sleeve, and the first sleeve is fixed on the magnetic mounting part; the static coil includes a second sleeve and a second coil wound on the second sleeve, and the second sleeve is rotatably mounted on the magnetic mounting part.

7. A rotor axial force control system, characterized in that: It includes an engine shaft, a bearing and a rotor axial force control device, the rotor axial force control device is the rotor axial force control device according to any one of claims 1 to 6, the bearing is arranged on the engine shaft, and the rotor axial force control device includes a power generation component and a coil component arranged on the engine shaft.

8. The rotor axial force control system according to claim 7, characterized in that: The control system of the rotor axial force further includes: a motor housing and a first support structure, wherein the first support structure is arranged on the inner wall of the motor housing, and the magnetic pole structure is arranged on the surface of the first support structure facing away from the motor housing.

9. The rotor axial force control system according to claim 8, characterized in that: The control system of the rotor axial force further includes: a second supporting structure, and the static coil is fixedly connected to the inner wall of the engine casing through the second supporting structure.

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