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 coil component, a rotating speed sensor and a current sensor, the bearing 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 connected with the signal receiving end of the control component, and the signal output end of the control component is connected with the signal receiving end of the coil component; the control component is used to determine the target axial electromagnetic force control parameter based on the current axial force determined by the rotating speed signal of the engine shaft and the preset axial force; if the current axial electromagnetic force control parameter determined based on the current signal of the coil component does not meet the target axial electromagnetic force control parameter, the electromagnetic control parameter of the coil component is adjusted. The device provided by the present disclosure can control the current axial electromagnetic force generated by the coil component through the control component, thereby realizing the real-time active control of the rotor axial force and prolonging the service life of the bearing.

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] The working conditions of an aero-engine are complex and changeable, and a passive axial force adjustment system is difficult to meet the full envelope requirement. It is particularly urgent to realize active adjustment of the bearing axial force under the premise of taking into account the efficiency and weight of the aero-engine, and to have excellent response speed, good followability, and even certain prediction ability. SUMMARY

[0004] The purpose of the present disclosure is to provide a rotor axial force control device and system for actively controlling the rotor axial force without changing the engine theme structure, so as to ensure that the bearing and other components can work stably and efficiently, thereby prolonging the overall service life of the aero-engine.

[0005] According to an aspect of the present disclosure, a rotor axial force control device is provided, which comprises a control component, a coil component, a rotational speed sensor, and a current sensor. The coil component is arranged on an engine shaft and is used to generate a control rotor axial electromagnetic force.

[0006] The signal receiving end of the rotational speed sensor is signal connected with the signal output end of the engine shaft, the signal receiving end of the current sensor is signal connected with the signal output end of the coil component, and the signal output end of the rotational speed sensor and the signal output end of the current sensor are both signal connected with the signal receiving end of the control component.

[0007] The control component is used to acquire the rotational speed signal of the engine shaft and the current signal of the coil component during the operation of the rotor, 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 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 current 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, a magnetic guide component, and a rotor axial force control device. The rotor axial force control device is the device described in the exemplary embodiments of the present disclosure. The bearing and the magnetic guide component are arranged on the engine shaft. The coil component included in the rotor axial force control device is arranged on the magnetic guide component.

[0010] In the one or more technical solutions provided in the exemplary embodiments of the present disclosure, the bearing sleeve is arranged on the engine shaft. The rotor axial force control device comprises a control component, a coil component, a rotational speed sensor, and a current sensor. The coil component is arranged on the engine shaft, and is used to generate an axial electromagnetic force for controlling the rotor axial force during the operation of the rotor. 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 a current axial force based on the rotational speed signal of the engine shaft, determine a control parameter of a current axial electromagnetic force based on the current signal of the coil component, and determine a control parameter of a target axial electromagnetic force based on the current axial force and a preset axial force. That is, during the operation of the rotor, the rotor axial force can comprise 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 connected with the signal receiving end of the coil assembly, and the control assembly can be used to adjust the electromagnetic control parameter of the coil assembly based on the target axial electromagnetic force control parameter and the current axial electromagnetic force control parameter if the current rotor electromagnetic force control parameter does not meet the target axial electromagnetic force control parameter, control the current axial electromagnetic force generated by the coil assembly through the control assembly, and 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 without changing the engine main body structure, and prolong the service life of the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0012] In the following description of 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 structural schematic diagram of an electromagnetic commutator of an exemplary embodiment of the present disclosure is shown;

[0015] Figure 3 A partial structural schematic diagram of a rotor axial force control device of an exemplary embodiment of the present disclosure is shown;

[0016] Figure 4 A structural schematic diagram of a rotor axial force control system of an exemplary embodiment of the present disclosure is shown.

[0017] Reference signs:

[0018] 110-control assembly, 111-controller, 112-electromagnetic commutator, 113-voltage regulator, 120-coil assembly, 121-rotating coil, 122-static coil, 130-rotational speed sensor, 140-current sensor, 210-housing, 220-conductive assembly, 221-insulator, 222-conductive body, 230-electromagnetic driving member, 240-limiting device, 250-electrode contact, 251-first electrode contact, 252-second electrode contact, 253-third electrode contact, 260-rotating coil wire, 270-elastic assembly, 310-magnetic conducting mounting member, 320-rotating coil, 321-first sleeve, 322-first coil, 330-static coil, 331-second sleeve, 332-second coil, 410-engine shaft, 420-bearing, 430-coil assembly, 431-rotating coil, 432-static coil, 440-engine housing, 450-first support structure, 460-second support structure, 470-electricity introducer. DETAILED DESCRIPTION

[0019] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be interpreted as being limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure can be more thoroughly and completely understood.

[0020] It should be understood that each of the steps 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.

[0021] The term "comprising" and variations thereof as used herein are open-ended, that is, "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 terms are defined as follows. 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.

[0022] 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, unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0023] 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.

[0024] The aero-engine is mainly composed of an inlet channel, 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 driven by the high-pressure turbine. The power turbine and the load are connected by a low-pressure rotor shaft and 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.

[0025] Ball bearings are crucial components of aircraft engines, and their reliability is paramount. The axial force acting on a ball bearing must not exceed the maximum design value nor fall below the minimum bearing force limit to prevent excessive bearing wear, slippage, and impact damage. Therefore, accurately calculating the rotor axial force and establishing a reasonable and reliable rotor axial force adjustment method are crucial for enhancing aircraft engine reliability.

[0026] Currently, methods for regulating rotor axial force include counteracting the axial forces of the compressor and turbine rotors, optimizing the internal cavity structure, adding bleed air control, and strengthening bearings. However, these methods still have certain shortcomings. For example, counteracting the axial forces and optimizing the internal cavity structure cannot achieve active control and still have certain limitations under complex operating conditions. The bleed air control structure is complex and increases the weight of the entire machine, and bleed air from the main flow path reduces engine efficiency. Strengthening bearings can ensure better reliability, but the design is difficult, and the passive bearing of excessive axial force requires a large amount of heat dissipation, which is not conducive to achieving good engine thermal management.

[0027] The operating conditions of aircraft engines are complex and changeable, and the passive axial force adjustment system is difficult to meet the full envelope requirements. It is particularly urgent to achieve active adjustment of the rotor axial force while taking into account the efficiency and weight of the aircraft engine, and to have excellent response speed, good followability and even a certain degree of predictive ability.

[0028] Based on the above problems, the present disclosure provides a control device and system for the rotor axial force, which can control the current axial electromagnetic force generated by the coil assembly through a control component, and use the adjustable current axial electromagnetic force to control the rotor axial force, so that the rotor axial force can meet the preset axial force, and realize real-time active control of the rotor axial force without changing the main structure of the engine, thereby extending the service life of the bearing.

[0029] In the device for controlling the axial force of a bearing provided by the present disclosure, the bearing is provided on the engine shaft. Figure 1 FIG. 1 is a schematic block diagram of a device for controlling the rotor axial force according to an exemplary embodiment of the present disclosure. Figure 1 As shown, the control device of the rotor axial force of the exemplary embodiment of the present disclosure includes: a control component 110, a coil component 120, a speed sensor 130 and a current sensor 140. The coil component 120 is arranged on the engine shaft, and the coil component 120 is used to generate an axial electromagnetic force to control the axial force of the bearing.

[0030] The signal receiving end of the speed sensor 130 is signal-connected to the signal output end of the engine shaft, and the signal receiving end of the current sensor 140 is signal-connected to 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 to the signal receiving end of the control assembly 110.

[0031] In actual implementation, the rotating speed sensor 130 can be configured to acquire the rotating speed signal of the engine shaft in real time during the operation of the rotor, and transmit the rotating speed signal of the engine shaft to the control component 110 through the signal output end of the rotating speed sensor 130 and the signal receiving end of the control component 110. The current sensor 140 can be configured to acquire 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 configured to acquire the rotating 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 rotating 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 configured to determine the current axial force corresponding to the current rotating speed of the engine shaft based on a pre-constructed mapping relationship between the rotating speed of the rotor and the axial force. The mapping relationship can be determined based on a rotating speed-axial force relationship characteristic curve or a function relationship between the rotating 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 a target rotor axial force required for the bearing to work stably and efficiently under the current working condition. The size of the preset axial force 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 configured 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 configured 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 the 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 without changing the main structure of the engine, 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 , wherein 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 positivity of the difference between the current axial force and the preset axial force.

[0040] When the positivity of the difference between the current axial force and the preset axial force is positive (i.e., F’>0), the current axial force is greater than the preset axial force, so that the rotor axial force obtained by offsetting part of the current axial force can meet the requirement of the preset axial force, so as to prevent the rotor axial force from being too large to cause bearing wear. At this time, the direction of the target axial electromagnetic force defined by the direction control parameter of the target axial electromagnetic force is opposite to the direction of the current axial force. If the direction of the current axial force is a positive direction, the direction of the target axial electromagnetic force defined by the direction control parameter of the target axial electromagnetic force is a negative direction.

[0041] When the difference between the current axial force and the preset axial force is negative (i.e., F' < 0), the current axial force is less than the preset axial force. Therefore, the rotor axial force obtained by adding a portion of the current axial force is required to meet the preset axial force requirement to avoid oil leakage due to insufficient bearing force. In this case, the direction of the target axial electromagnetic force defined by the target axial electromagnetic force direction control parameter is the same as the direction of the current axial force. If the direction of the current axial force is positive, the direction of the target axial electromagnetic force defined by the target axial electromagnetic force direction control parameter is positive.

[0042] In an alternative approach, such as Figure 1 As shown, the coil assembly 120 of the exemplary embodiment of the present disclosure may include a rotating coil 121 and a static coil 122, and the control assembly 110 may include a controller 111, an electromagnetic commutator 112, and a transformer-regulator 113. The signal receiving end of the controller 111 is respectively connected to the signal output end of the rotation speed sensor 130 and the signal output end of the current sensor 140, and the signal output end of the controller 111 is respectively connected to the signal receiving end of the electromagnetic commutator 112 and the signal receiving end of the transformer-regulator 113. The power output end of the electromagnetic commutator 112 is electrically connected to the rotating coil 121, and the power output end of the transformer-regulator 113 is electrically connected to the static coil 122.

[0043] For example, the control parameters of the exemplary embodiments of the present disclosure may include a direction control parameter. The direction control parameter of the current axial electromagnetic force may be determined based on the current direction of the rotating coil. When the current direction of the rotating coil is positive, the direction of the current axial electromagnetic force generated between the rotating coil and the static coil is positive, and the direction of the current axial electromagnetic force defined by the direction control parameter of the current axial electromagnetic force is positive. When the current direction of the rotating coil is negative, the direction of the current axial electromagnetic force generated between the rotating coil and the static coil is negative, and the direction of the current axial electromagnetic force defined by the direction control parameter of the current axial electromagnetic force is negative.

[0044] The electromagnetic control parameters of the exemplary embodiment of the present disclosure may include a current direction parameter of the rotating coil, and the current direction parameter of the rotating coil can be used to control the direction of the current axial electromagnetic force. In this case, the controller 111 can be used to adjust the current direction parameter of the rotating coil based on the direction control parameter of the target axial electromagnetic force and the direction control parameter of the current axial electromagnetic force. Then, the controller 111 communicates with the signal receiving end of the electromagnetic commutator 112 via the signal output end of the controller 111. The controller 111 transmits the current direction parameter of the rotating coil to the electromagnetic commutator 112, and the electromagnetic commutator 112 is used to control the current direction of the rotating coil based on the current direction parameter of the rotating coil.

[0045] Assuming that the current direction parameter of the rotating coil defines the current direction as the positive direction before adjustment, and the direction control parameter of the current axial electromagnetic force defines the direction of the current axial electromagnetic force as the positive direction. If the direction control parameter of the target axial electromagnetic force defines the direction of the target axial electromagnetic force as the reverse direction, at this time, the controller 111 can determine that the direction of the current axial electromagnetic force is opposite to the direction of the target axial electromagnetic force based on the direction control parameter of the target axial electromagnetic force and the direction control parameter of the current axial electromagnetic force, then adjust the current direction parameter of the rotating coil to the current direction parameter defining the opposite current direction, and send the current direction parameter of the rotating coil to the electromagnetic commutator 112. The electromagnetic commutator 112 receives the current direction parameter of the rotating coil and controls the current direction of the rotating coil to be the reverse direction based on the current direction parameter of the rotating coil. At this time, the rotating coil and the static coil can generate the adjusted current axial electromagnetic force, the direction of the adjusted current axial electromagnetic force is the same as the direction of the target axial electromagnetic force, and the adjusted current axial electromagnetic force can be used to offset a part of the current axial force to achieve active reduction of the rotor axial force.

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

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

[0048] F c =α*|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, α represents the direction control parameter of the current axial electromagnetic force, and takes the value of 1 or -1. When α takes the value of 1, the direction control parameter of the current axial electromagnetic force defines the direction of the current axial electromagnetic force as the positive direction; when α takes the value of -1, the direction control parameter of the current axial electromagnetic force defines the direction of the current axial electromagnetic force as the reverse direction. |f(I a ,I b ,r a ,r b ,la , l b , l ab , n a , n b , μ) represents the intensity of the current axial electromagnetic force, which can be determined based on a function 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, l b represents the width of the rotating coil, l ab represents the distance between the static coil and the rotating coil, n a represents the number of turns of the static coil, n b represents the number of turns of the rotating coil, and μ represents the equivalent magnetic permeability. Except for I a , the remaining independent variables are constant values.

[0050] The electromagnetic control parameter of the exemplary embodiment of the present disclosure can include an input voltage parameter of the static coil, which can be used to control the intensity of the current axial electromagnetic force. At this time, 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, and then the signal output end of the controller 111 communicates with the signal receiving end of the voltage regulator 113, the controller 111 transmits the input voltage parameter of the static coil to the voltage regulator 113, and the voltage regulator 113 can be used to control the input voltage of the static coil based on the input voltage parameter of the static coil.

[0051] 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 113, which 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 reduction of the rotor axial force.

[0052] In actual applications, 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.

[0053] 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.

[0054] 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.

[0055] In an alternative way, Figure 2 The structure of the electromagnetic commutator is shown in the structural schematic diagram of the electromagnetic commutator of the example embodiment of the present disclosure. As Figure 2As shown, the electromagnetic commutator of the exemplary embodiment of the present disclosure can include a shell 210, a conductive assembly 220, and an electromagnetic drive 230 connected with the signal output of the controller, the shell has a first limiting space and a second limiting space, the electromagnetic drive 230 is arranged in the first limiting space, and the conductive assembly 220 is arranged in the second limiting space.

[0056] The shell 210 has a positive electrode pair and a negative electrode pair, both of which are electrically connected with the rotating coil, and the electromagnetic drive is used to drive the conductive assembly to contact the positive electrode pair or the negative electrode pair.

[0057] In the specific implementation, as shown, Figure 2 As shown, the electromagnetic commutator of the exemplary embodiment of the present disclosure can further include a limiting device 240 for separating the shell into the first limiting space and the second limiting space. In the electromagnetic commutator of the exemplary embodiment of the present disclosure, the first limiting space can be located on the left side of the limiting device 240 in the horizontal direction, and the second limiting space can be located on the right side of the limiting device 240 in the horizontal direction.

[0058] The conductive assembly 220 of the exemplary embodiment of the present disclosure can include an insulator 221 and two conductive bodies 222, the insulator 221 is used to fix the two conductive bodies 222, so that the two conductive bodies 222 are in contact with the positive electrode pair or the negative electrode pair under the driving action of the electromagnetic drive 230. The conductive body 222 can be a armature or other conductive material, which is not limited here.

[0059] As shown, Figure 2 The electromagnetic commutator of the exemplary embodiment of the present disclosure can further include electrode contacts 250, which can include a first electrode contact 251, a second electrode contact 252, and a third electrode contact 253, and the adjacent two electrode contacts have different electrode polarities, and the adjacent two electrode contacts form an electrode pair. For example, if the electrode polarities of the first electrode contact 251, the second electrode contact 252, and the third electrode contact 253 are "+", "-" and "+" respectively, the electrode pair formed by the first electrode contact 251 and the second electrode contact 252 is the positive electrode pair, and the electrode pair formed by the second electrode contact 252 and the third electrode contact 253 is the negative electrode pair.

[0060] The electromagnetic commutator of the exemplary embodiment of the present disclosure can further include a rotating coil wire 260, the conductive assembly 220 is electrically connected with the rotating coil wire 260 through a slide rail (not shown in the figure), and the positive electrode pair and the negative electrode pair are electrically connected with the rotating coil through the conductive assembly 220 and the rotating coil wire 260, so as to realize the circuit closure of the rotating coil.

[0061] In an alternative way, the electromagnetic commutator is further configured to control the electromagnetic driver to drive the conductive assembly to contact the positive electrode pair if the current direction defined by the current direction parameter of the rotating coil is positive, and control the electromagnetic driver to drive the conductive assembly to contact the negative electrode pair if the current direction defined by the current direction parameter of the rotating coil is negative.

[0062] As shown in FIG. 2, it is assumed that the electrode pair composed of the first electrode contact 251 and the second electrode contact 252 is the positive electrode pair, and the conductive assembly 220 is in the "left position", and the current direction of the rotating coil is positive; the electrode pair composed of the second electrode contact 252 and the third electrode contact 253 is the negative electrode pair, and the conductive assembly 220 is in the "right position", and the current direction of the rotating coil is negative. Figure 2

[0063] The electromagnetic commutator of the exemplary embodiment of the present disclosure can further include an elastic assembly 270, a first end of the elastic assembly 270 being fixedly connected with the conductive assembly 220, and a second end of the elastic assembly 270 being fixedly connected with or in the housing. If the current direction defined by the current direction parameter of the rotating coil is positive, the controller controls the electromagnetic commutator to be in the energized state, the electromagnetic driver 230 is magnetized under the electromagnetic induction, the magnetic force generated by the electromagnetic driver 230 overcomes the elastic force of the elastic assembly 270, so that the conductive assembly 220 contacts the positive electrode pair, the conductive assembly 220 is in the "left position", and the current direction of the rotating coil is positive. If the current direction defined by the current direction parameter of the rotating coil is negative, the controller controls the electromagnetic commutator to be in the de-energized state, the electromagnetic driver 230 does not generate the magnetic force, and under the action of the elastic force of the elastic assembly 270, the conductive assembly 220 contacts the negative electrode pair, the conductive assembly 220 is in the "right position", and the current direction of the rotating coil is negative.

[0064] In an alternative way, Figure 3 FIG. 4 shows a partial structure schematic diagram of a rotor axial force control device according to an exemplary embodiment of the present disclosure. As shown in FIG. 4, the rotor axial force control device of the exemplary embodiment of the present disclosure can further include a magnetic conductive mounting member 310 for mounting on the engine shaft, and the rotating coil 320 can include a first sleeve 321 and a first coil 322 wound on the first sleeve 321, and the first sleeve 321 is fixed on the magnetic conductive mounting member 310; the static coil 330 can include a second sleeve 331 and a second coil 332 wound on the second sleeve 331, and the second sleeve 331 is rotatably sleeved on the magnetic conductive mounting member 310. The magnetic conductive mounting member can be an electromagnet, silicon steel, soft iron, or other magnetic conductive materials, which are not specifically limited here. Figure 3

[0065] ​​In an optional manner, the rotor axial force control device of the exemplary embodiment of the present disclosure may also include: a power supply module and a galvanometer, the power output end of the power supply module is electrically connected to the power input end of the electromagnetic commutator, the power output end of the electromagnetic commutator is electrically connected to the rotating coil through the galvanometer, and the power supply module is also electrically connected to the static coil through a transformer regulator.

[0066] In practice, the current entering the rotating coil first flows through the electromagnetic commutator. The controller of the exemplary embodiment of the present disclosure controls the direction of the current in the rotating coil by controlling the direction of the current in the electromagnetic commutator. The first sleeve 321 also serves as two electrodes connected to the rotating coil. During engine shaft rotation, the inductor directly presses against the first sleeve 321, energizing the rotating coil.

[0067] 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 transformer regulator input voltage, thereby controlling the current intensity of the rotating coil.

[0068] The present disclosure provides a control system for the axial force of a rotor. Figure 4 FIG. 1 shows a schematic diagram of a control system for the rotor axial force according to an exemplary embodiment of the present disclosure. Figure 4 As shown, the control system of the rotor axial force of the exemplary embodiment of the present disclosure may include an engine shaft 410, a bearing 420 and a control device for the rotor axial force (only the coil assembly 430 and the induction device 470 are shown in the figure). The control device for the rotor axial force is the control device for the rotor axial force of the exemplary embodiment of the present disclosure, the bearing 420 is arranged on the engine shaft 410, and the control device for the rotor axial force includes a coil assembly 430 arranged on the engine shaft 410.

[0069] In an optional manner, the coil assembly 430 of the exemplary embodiment of the present disclosure may include a rotating coil 431 and a static coil 432, and the control system of the rotor axial force may also include: an engine casing 440, a first support structure 450 and a second support structure 460, the first support structure is arranged on the inner wall of the engine casing 440, the rotating coil 431 is rotatably connected to the surface of the first support structure 450 away from the engine casing 440 through the induction device 470; the static coil 432 is fixedly connected to the inner wall of the engine casing 440 through the second support structure 460.

[0070] It can be seen that in the device of the exemplary embodiment of the present disclosure, the rotating speed of the engine shaft and the current of the coil assembly can be transmitted in real time by the control assembly, without changing the engine body structure, and without needing to set sensors on the rotating parts or the connection, facilitating installation, being able to meet the full envelope line requirement of the engine, having the characteristics of simple structure and light weight, and through real-time active control of the rotor axial force, the thermal load of the bearing and other components can be effectively reduced, the service life of the bearing is prolonged, and the design of the thermal management system is simplified. 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 full envelope line requirement of the engine, the bearing has a large and variable load, has a large heat dissipation, and has reduced reliability, and is difficult to realize good engine thermal management are solved.

[0071] In one or more of the technical solutions provided in the exemplary embodiments of the present disclosure, the bearing sleeve is arranged on the engine shaft, the control device of the rotor axial force comprises a control assembly, a coil assembly, a rotating speed sensor and a current sensor, the coil assembly is arranged on the engine shaft, and the coil assembly is used to generate an axial electromagnetic force for controlling the rotor axial force during operation of the rotor. The signal receiving end of the rotating speed sensor is in signal connection with the signal output end of the engine shaft, so that the rotating speed sensor can be used to collect the rotating speed signal of the engine shaft during operation of the rotor; the signal receiving end of the current sensor is in signal connection 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 during operation of the rotor. The signal output end of the rotating speed sensor and the signal output end of the current sensor are both in signal connection with the signal receiving end of the control assembly, so that the control assembly can obtain the rotating speed signal of the engine shaft from the rotating speed sensor and the current signal of the coil assembly from the current sensor during operation of the rotor. Then the control assembly can be used to determine a current axial force based on the rotating speed signal of the engine shaft, determine a control parameter of a 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. That is, during operation of the rotor, the rotor axial force 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 assembly to control the current axial electromagnetic force generated by the coil assembly.

[0072] Based on this, the signal output end of the control assembly is in signal connection 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, 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, so that the rotor axial force can meet the preset axial force, and the real-time active control of the rotor axial force is realized without changing the engine body structure, prolonging the service life of the bearing.

[0073] Although the present disclosure has been described in connection with certain specific features and embodiments thereof, it is to be understood that it is provided as an exemplification of the principles of the present disclosure and the features set forth herein are intended to be illustrative rather than limiting, and that numerous changes and modifications in the application can be made by those skilled in the art without departing from the spirit and scope of the disclosure. Accordingly, it is intended that all such changes and modifications be included within the scope of the application as defined by the following claims. It is also to be understood that the following claims are to govern the scope of the present disclosure and are to be afforded all proper meanings set out in the claims and equivalents thereof under the applicable patent law.

Claims

1. A device for controlling the axial force of a rotor, characterized in that: The rotor axial force control device includes: a control component, a coil component, a speed sensor and a current sensor, wherein the coil component is arranged on the engine shaft and is used to generate an axial electromagnetic force to control the rotor axial force; 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 the 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 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; 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 current 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 coil assembly includes a rotating coil and a static coil, and the control assembly includes a controller, an electromagnetic commutator and a voltage regulator; The signal receiving end of the controller is respectively connected to the signal output end of the speed sensor and the signal output end of the current sensor, the signal output end of the controller is respectively connected to the signal receiving end of the electromagnetic commutator and the signal receiving end of the transformer regulator, the power output end of the electromagnetic commutator is electrically connected to the rotating coil, and the power output end of the transformer regulator is electrically connected to the static coil.

2. The rotor axial force control device according to claim 1, characterized in that: The control parameters include direction control parameters, and the electromagnetic control parameters include current direction parameters of the rotating coil; The controller is used to adjust the current direction parameter of the rotating coil based on the direction control parameter of the target axial electromagnetic force and the direction control parameter of the current axial electromagnetic force, and the electromagnetic commutator is used to control the current direction of the rotating coil based on the current direction parameter of the rotating coil.

3. The rotor axial force control device according to claim 1, 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 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, and the transformer regulator is used to control the input voltage of the static coil based on the input voltage parameter of the static coil.

4. The rotor axial force control device according to claim 3, 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.

5. The rotor axial force control device according to claim 1, characterized in that: The electromagnetic commutator includes a housing, a conductive component, and an electromagnetic driver connected to the signal output terminal of the controller. The housing has a first limit space and a second limit space. The electromagnetic driver is arranged in the first limit space, and the conductive component is arranged in the second limit space. The shell has a positive direction electrode pair and a negative direction electrode pair, both of which are electrically connected to the rotating coil, and the electromagnetic driving component is used to drive the conductive component to contact the positive direction electrode pair or the negative direction electrode.

6. The rotor axial force control device according to claim 5, characterized in that: The electromagnetic control parameter includes a current direction parameter of the rotating coil, and the electromagnetic commutator is used to control the electromagnetic driving member to drive the conductive component to contact the positive direction electrode pair based on the current direction parameter of the rotating coil if the current direction defined by the current direction parameter of the rotating coil is a positive direction; The electromagnetic commutator is further configured to control the electromagnetic driving component to drive the conductive component to contact the opposite direction electrode pair based on the current direction parameter of the rotating coil if the current direction defined by the current direction parameter of the rotating coil is the opposite direction.

7. The rotor axial force control device according to any one of claims 1 to 6, 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.

8. The rotor axial force control device according to claim 7, characterized in that: The control device for the rotor axial force also includes: a power supply module and a galvanometer, the power output end of the power supply module is electrically connected to the power input end of the electromagnetic commutator, the power output end of the electromagnetic commutator is electrically connected to the rotating coil through the galvanometer, and the power supply module is also electrically connected to the static coil through the transformer regulator.

9. 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 claim 8, the bearing is arranged on the engine shaft, and the rotor axial force control device includes a coil assembly arranged on the engine shaft.

10. The rotor axial force control system according to claim 9, characterized in that: The control system of the rotor axial force further includes: an engine housing, a first support structure, and a second support structure, wherein the first support structure is provided on the inner wall of the engine housing, and the rotating coil is rotatably connected to a surface of the first support structure facing away from the engine housing via the induction device; The static coil is fixedly connected to the inner wall of the engine casing through the second supporting structure.

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