A variable stiffness combined elastic support device and control method

Abstract

The application discloses a variable stiffness combined elastic supporting device and a control method. The elastic supporting device is used for a rotor shaft of an engine and comprises a cage member, a first variable stiffness assembly, a second variable stiffness assembly and an electromagnetic assembly. The first variable stiffness assembly comprises a moving member, the second variable stiffness assembly comprises a movable member and a deformation member, the cage member is used for connecting the rotor shaft of the engine, the cage member comprises a plurality of cage bars, the electromagnetic assembly can drive the moving member to move relative to the cage member along a radial direction of the cage member so that the moving member is located between adjacent cage bars or the moving member is spaced apart from the cage member, and the electromagnetic assembly can also drive the movable member to move relative to the cage member along an axial direction of the cage member so that the movable member can press the deformation member or the movable member does not exert force on the deformation member. According to the elastic supporting device, a critical rotating speed of the rotor shaft is avoided, and vibration peaks are reduced.

Description

Technical Field

[0001] This application relates to the field of aerospace technology, and more particularly to a variable stiffness combined elastic support device and control method. Background Technology

[0002] Aircraft include engines, which drive impellers to rotate. During operation, engine operation generates vibrations. Excessive engine vibration can affect the safe and reliable operation of the aircraft.

[0003] Therefore, in view of the above situation, it is necessary to provide a variable stiffness combined elastic support device and control method to at least partially solve the existing problems. Summary of the Invention

[0004] The summary of this application introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] According to a first aspect of this application, a variable stiffness combined elastic support device is provided for the rotor shaft of an engine, the elastic support device comprising:

[0006] A cage component for connecting the rotor shaft of an engine, the cage component comprising a plurality of cage bars spaced apart along the circumferential direction of the cage component;

[0007] A first variable stiffness component, the first variable stiffness component including a movable member;

[0008] The second variable stiffness component includes a movable component and a deformable component;

[0009] An electromagnetic component is provided, capable of driving the movable member to move relative to the cage member in the radial direction of the cage member, such that the movable member is positioned between adjacent cage bars or spaced apart from the cage member.

[0010] The electromagnetic component can also drive the movable member to move relative to the cage member along the axial direction of the cage member, so that the movable member can compress the deformable member or the movable member can exert no force on the deformable member.

[0011] According to the elastic support device of this application, for the rotor shaft of an engine, the elastic support device includes a cage member, a first variable stiffness assembly, a second variable stiffness assembly, and an electromagnetic assembly. The first variable stiffness assembly includes a moving member, and the second variable stiffness assembly includes a movable member and a deformable member. The cage member is used to connect the rotor shaft of the engine and includes a plurality of cage bars spaced apart along the circumferential direction of the cage member. The electromagnetic assembly can drive the moving member to move relative to the cage member in the radial direction of the cage member, such that the moving member is located between adjacent cage bars or spaced apart from the cage member. The electromagnetic assembly can also drive the movable member to move relative to the cage member in the axial direction of the cage member, such that the movable member can compress the deformable member or the movable member does not apply force to the deformable member. In this way, the moving components are located in different positions, which changes the support stiffness of the elastic support device. The movable components are located in different positions, which changes the support stiffness of the deformable components. The movable components are located in different positions, which changes the support stiffness of the elastic support device. This allows for matching rotor shafts with different speeds, avoiding the critical speed of the rotor shaft, effectively suppressing the peak vibration of the rotor shaft within its operating speed range, improving rotor dynamic characteristics, reducing vibration, and lowering vibration peak values. The moving and movable components are driven to move by electromagnetic components, resulting in high adjustment accuracy, fast response speed, reliability, and durability.

[0012] Optionally, the electromagnetic assembly includes a first electromagnetic member corresponding to the moving member along the radial direction. The first electromagnetic member drives the moving member to move relative to the cage member between a first position and a second position.

[0013] The movable member located at the first position is situated between adjacent cage bars and is in contact with the cage bars.

[0014] The movable member located in the second position is spaced apart from the cage member.

[0015] Optionally, the cage component further includes a base and an outer edge. The base is connected to one end of the cage bar along the axial direction of the cage component, and the outer edge is connected to the other end of the cage bar along the axial direction. The movable member located at the first position is in contact with the base, and the movable member located at the first position is in contact with the outer edge.

[0016] Optionally, the movable component includes a main body portion that is fitted to the cage bars, the main body portion that is fitted to the base portion, and the main body portion that is fitted to the outer edge portion.

[0017] Optionally, the movable member further includes a protrusion that protrudes from the end of the main body, and the outer edge includes a notch in which the protrusion is located.

[0018] Optionally, the elastic support device further includes a plurality of the first electromagnetic components, which are spaced apart along the circumferential direction of the cage component.

[0019] Optionally, the first variable stiffness component further includes a first moving member and a second moving member, the first moving member and the second moving member being located on both sides of the cage member along the radial direction, and the same first electromagnetic member being able to drive both the first moving member and the second moving member to move.

[0020] Optionally, the first electromagnetic component is located inside the cage component, and the first electromagnetic component is energized to cause the moving component located in the second position to move toward the first electromagnetic component to the first position.

[0021] Optionally, the electromagnetic assembly further includes a second electromagnetic component, which corresponds to the movable component along the axial direction. The second electromagnetic component drives the movable component to move relative to the cage component between a third position and a fourth position.

[0022] The movable member located in the third position can compress the deformable member.

[0023] The movable member located in the fourth position does not exert a force on the deformable member.

[0024] Optionally, the movable component includes a body portion, which is disposed opposite to the second electromagnetic component along the axial direction.

[0025] Optionally, the movable member further includes a pressing portion that protrudes from the body portion along the axial direction toward the deformable member.

[0026] When the second electromagnetic component is energized, it attracts the body portion located at the fourth position to move toward the deformable component. The body portion located at the third position abuts against the second electromagnetic component, and the extrusion portion located at the third position can extrude the deformable component.

[0027] Optionally, the deformable member can undergo elastic deformation along the axial direction.

[0028] When the second electromagnetic component is de-energized, the deformation component applies an elastic force away from the deformation component to the extrusion portion located at the third position. The body portion located at the fourth position is spaced apart from the second electromagnetic component, and the extrusion portion located at the fourth position does not apply a force to the deformation component.

[0029] Optionally, the elastic support device further includes a plurality of second electromagnetic components, which are spaced apart along the circumferential direction of the cage component.

[0030] Optionally, the elastic support device further includes a fixing member, the fixing member including a receiving chamber for receiving the cage member, and the electromagnetic assembly including a first electromagnetic member and a second electromagnetic member, the first electromagnetic member being located inside the fixing member and the second electromagnetic member being located outside the fixing member.

[0031] Optionally, the fixing member further includes a protruding plate, and the elastic support device further includes a deformation member. The protruding plate protrudes in the direction of the movable member along the axial direction, and the deformation member is disposed between the protruding plate and the cage member along the radial direction of the cage member.

[0032] Optionally, the elastic support device includes a plurality of second electromagnetic components, and the fixing component further includes a fixing plate connected to the protruding plate, wherein the plurality of second electromagnetic components are all fixed to the fixing plate.

[0033] Optionally, the first variable stiffness component further includes a first guide member connected to the moving member. The fixed member is provided with a through hole, and the first guide member is inserted into the through hole. The first guide member is movable relative to the through hole in the radial direction to guide the moving member to move in the radial direction.

[0034] Optionally, the first variable stiffness component further includes an elastic member, one end of which abuts against the first guide member along the radial direction, and the other end of which abuts against the fixed member along the radial direction. The elastic member is capable of elastic deformation along the radial direction to move the moving member located at the first position to the second position.

[0035] Optionally, the second variable stiffness assembly further includes a second guide member and a second mating member, the second guide member being disposed to the fixed member and the second mating member being disposed to the movable member, the second guide member and the second mating member being connected to guide the movable member to move along the axial direction.

[0036] Optionally, one of the second guide member and the second mating member is a hole and the other is a pin, with the pin inserted into the hole.

[0037] This application also provides a control method employing the aforementioned elastic support device, wherein the elastic support device is used for the rotor shaft of an engine, the cage member is connected to the rotor shaft, and the elastic support device further includes a deformation member; the control method includes:

[0038] When the rotor shaft rotates at a first speed, the electromagnetic component is energized to move the movable member in the second position to the first position and the active member in the fourth position to the third position.

[0039] When the rotor shaft rotates at a second speed, the electromagnetic component is de-energized so that the moving member located at the first position moves to the second position, and the movable member located at the third position moves to the fourth position;

[0040] The first rotational speed is less than the second rotational speed.

[0041] According to the control method of this application, the control method employs the aforementioned elastic support device, which is used for the rotor shaft of the engine. The cage component is connected to the rotor shaft, and the elastic support device also includes a deformation component. The control method includes: when the rotor shaft rotates at a first speed, the electromagnetic component is energized to move the movable component located at the second position to the first position, and the movable component located at the fourth position to the third position; when the rotor shaft rotates at a second speed, the electromagnetic component is de-energized to move the movable component located at the first position to the second position, and the movable component located at the third position to the fourth position, wherein the first speed is less than the second speed. In this way, the movable component being located at different positions changes the support stiffness of the elastic support device, the movable component being located at different positions changes the support stiffness of the deformation component, and the movable component being located at different positions changes the support stiffness of the elastic support device. This allows for matching rotor shafts at different speeds, avoiding the critical speed of the rotor shaft, effectively suppressing peak vibration of the rotor shaft within its operating speed range, improving rotor dynamics, reducing vibration, and lowering vibration peak values. The electromagnetic component drives the movable component and the movable component to move respectively, resulting in high adjustment accuracy, fast response speed, and reliable durability. Attached Figure Description

[0042] The following figures are included as part of this application for understanding the application. The figures illustrate embodiments of the application and their descriptions, explaining the apparatus and principles of the application. In the figures,

[0043] Figure 1This is an exploded view of an elastic support device according to a preferred embodiment of this application;

[0044] Figure 2 for Figure 1 A three-dimensional schematic diagram of the cage components shown;

[0045] Figure 3 for Figure 1 A three-dimensional schematic diagram of the movable component shown;

[0046] Figure 4 for Figure 1 A partial cross-sectional schematic diagram of the elastic support device shown;

[0047] Figure 5 for Figure 4 A partial schematic diagram of the elastic support device is shown, in which the movable component is located in the first position;

[0048] Figure 6 for Figure 4 A partial schematic diagram of the elastic support device is shown, in which the movable component is located in the second position;

[0049] Figure 7 for Figure 4 A schematic diagram of the static stiffness test of the elastic support device shown.

[0050] Figure 8 This is a curve showing the variation of the support stiffness of the engine's rotor shaft.

[0051] Figure 9 This is a curve showing the change in stiffness of another support for the engine's rotor shaft.

[0052] Figure 10 for Figure 6 The load-displacement curve of the elastic support device is shown below;

[0053] Figure 11 for Figure 5 The load-displacement curve of the elastic support device is shown.

[0054] Explanation of reference numerals in the attached figures:

[0055] 100: Elastic support device; 110: Cage component

[0056] 111: Cage bars 112: Space

[0057] 113: Base 114: Outer edge

[0058] 115: Notch 116: Flange

[0059] 130: Moving component; 131: Main body

[0060] 132: Protrusion 133: Reset Hole

[0061] 134: First mating component; 140: Moving component

[0062] 141: Body section 142: Extrusion section

[0063] 144: Second mating component; 151: First electromagnetic component

[0064] 152: Second electromagnetic component; 160: Fixed component

[0065] 161: Receiving chamber; 162: Fastening component

[0066] 163: Protruding plate; 164: Fixing plate

[0067] 170: Elastic member; 171: One end of the elastic member

[0068] 172: The other end of the elastic member; 173: The first guide member.

[0069] 174: Second guide component; 180: Deformation component

[0070] 200: Bench; 201: Eddy current displacement sensor

[0071] 202: First weight 203: Second weight

[0072] 204: Rotor shaft Detailed Implementation

[0073] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0074] To fully understand this application, detailed descriptions will be provided below to illustrate it. Obviously, implementation of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may exist besides these detailed descriptions and should not be construed as being limited to the embodiments set forth herein.

[0075] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this application. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms “upper,” “lower,” “front,” “rear,” “left,” “right,” and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0076] The ordinal numbers such as "first" and "second" used in this application are merely identifiers and have no other meaning, such as a specific order. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0077] The specific embodiments of this application will be described in more detail below with reference to the accompanying drawings, which illustrate representative embodiments of this application and are not intended to limit this application.

[0078] Figure 1 This application illustrates a preferred embodiment of an elastic support device 100 for an engine rotor shaft 204 (rotor shaft 204 in...). Figure 7 (As shown in the figure). The stiffness of the elastic support device 100 is variable. The rotor shaft 204 rotates to generate vibration. The elastic support device 100 is able to withstand the vibration output by the rotor shaft 204. The variable stiffness combined elastic support device 100 can be matched to the rotor shaft 204 at different speeds, thereby reducing the vibration of the rotor shaft 204 at different speeds.

[0079] Specifically, the elastic support device 100 includes a cage member 110, a first variable stiffness assembly, a second variable stiffness assembly, and an electromagnetic component. The cage member 110 is used to connect the rotor shaft 204 of the engine. The cage member 110 can be constructed as a squirrel cage structure. The cage member 110 is a hollow cylindrical structure. Figure 2As shown, the cage member 110 includes a plurality of cage bars 111, which are spaced apart along the circumferential direction of the cage member 110. The cage member 110 has a rotor bore through which a rotor shaft 204 extends. The rotor bore supports the rotor shaft 204 to bear the vibrations transmitted from the rotor shaft 204 to the cage member 110. The rotor shaft 204 passes through the rotor bore via bearings. The axial direction D1 of the cage member 110 is parallel to the axial direction of the rotor shaft 204. The radial direction D2 of the cage member 110 is parallel to the radial direction of the rotor shaft 204. The longitudinal direction of the cage bars 111 is parallel to the axial direction D1 of the cage member 110. A space 112 is formed between adjacent cage bars 111.

[0080] The first variable stiffness assembly includes a movable member 130, which is driven to move by the electromagnetic components. The electromagnetic components drive the movable member 130 to move relative to the cage member 110. The electromagnetic components also drive the movable member 130 to move radially D2 relative to the cage member 110. This allows the movable member 130 to be positioned between adjacent cage bars or spaced apart from the cage member 110.

[0081] The electromagnetic component drives the moving member 130 to move between a first position and a second position relative to the cage member 110. The moving member 130 is positioned in different positions, allowing the elastic support device 100 to have different stiffnesses to accommodate different rotational speeds of the rotor shaft 204, thus broadening its application range. Consequently, by moving the moving member 130 to different positions, the stiffness of the elastic support device 100 along the axial direction D1 of the cage member 110 can be changed.

[0082] like Figure 5 As shown, the movable member 130 in the first position is located within the cage member 110. The movable member 130 in the first position is located inside the cage member 110. Specifically, the movable member 130 in the first position is located between adjacent cage bars 111. The movable member 130 in the first position is located in the space 112. The movable member 130 in the first position is capable of filling the space 112 between adjacent cage bars 111.

[0083] The movable member 130 in the first position is in contact with the cage member 110. The edges of the movable member 130 in the first position are in contact with the cage member 110. Therefore, the movable member 130 in the first position enhances the stiffness of the elastic support device 100 along the axial direction D1 of the cage member 110. The combination of the movable member 130 in the first position and the cage member 110 improves the overall stiffness, thereby adapting to the rotor shaft 204 at the first rotational speed. The stiffness of the cage member 110 itself is k1, and the stiffness of the movable member 130 in the first position combined with the cage member 110 is k2, where k2 > k1. The stiffness of the movable member 130 in the first position along the axial direction D1 of the cage member 110 is superimposed on the stiffness of the cage member 110. Therefore, the stiffness of the movable member 130 in the first position combined with the cage member 110 along the axial direction D1 of the cage member 110 is improved.

[0084] like Figure 6 As shown, the movable member 130 in the second position is spaced apart from the cage member 110. When the electromagnetic assembly is de-energized, the movable member 130 in the first position moves to the second position. The movable member 130 in the first position is located inside the cage member 110. The movable member 130 in the second position is located outside the cage member 110. The movable member 130 in the second position does not contact the cage member 110, thereby adapting to the rotor shaft 204 at the second rotational speed.

[0085] The second variable stiffness assembly includes a movable member 140 and a deformation member 180. The electromagnetic assembly can also drive the movable member 140 to move relative to the cage member 110. The electromagnetic assembly can drive the movable member 140 to move along the axial direction of the cage member 110. The movable member 140 corresponds to the electromagnetic assembly along the axial direction of the cage member 110. The movable member 140 can move relative to the cage member 110 along the axial direction of the cage member 110. The movable member 140 is made of a magnetically conductive material, and the electromagnetic assembly is constructed as an electromagnet. The electromagnetic assembly is connected to the cage member 110 via bolts or other connecting parts. The movable member 140 is constructed as a pressure plate. When the electromagnetic assembly is energized, it generates a magnetic field, and the magnetic force can drive the movable member 140 to move.

[0086] The movable member 140 is movable relative to the cage member 110 along the axial direction of the cage member 110. When the electromagnetic component is energized, it drives the movable member 140 to move toward the cage member 110. The electromagnetic component drives the movable member 140 to move relative to the cage member 110 between a third position and a fourth position. The movable member 140 is positioned in different positions, resulting in different stiffnesses of the elastic support device 100 to accommodate different rotational speeds of the rotor shaft 204, thus broadening its application range. Therefore, by moving the movable member 140 to different positions, the stiffness of the elastic support device 100 along the axial direction D1 of the cage member 110 can be changed.

[0087] The deformable member 180 is fitted onto the cage member 110. The deformable member 180 is constructed as a metal-rubber ring. When the electromagnetic component is energized, it can drive the movable member 140 to move. The electromagnetic component can drive the movable member 140 to move towards the deformable member 180 along the axial direction of the cage member 110, or drive the movable member 140 to move away from the deformable member 180 along the axial direction of the cage member 110.

[0088] The electromagnetic component can drive the movable component 140 to move so that the movable component 140 can compress the deformable component 180. The electromagnetic component can also drive the movable component to move so that the movable component 140 does not exert a force on the deformable component 180.

[0089] Therefore, by adjusting the critical speed of the rotor shaft based on the parallel connection of the moving and movable components, the vibration peak value of the rotor shaft is reduced, thus achieving active control of the rotor shaft vibration.

[0090] According to the present application, a variable stiffness combined elastic support device is used for the rotor shaft 204 of an engine. The elastic support device includes a cage member 110, a first variable stiffness assembly, a second variable stiffness assembly, and an electromagnetic assembly. The first variable stiffness assembly includes a moving member, and the second variable stiffness assembly includes a movable member and a deformable member. The cage member 110 is used to connect the rotor shaft 204 of the engine. The cage member 110 includes a plurality of cage bars 111, which are spaced apart along the circumferential direction of the cage member 110. The electromagnetic assembly can drive the moving member 130 to move relative to the cage member 110 in the radial direction of the cage member, so that the moving member is located between adjacent cage bars or spaced apart from the cage member. The electromagnetic assembly can also drive the movable member 140 to move relative to the cage member 110 in the axial direction of the cage member 110, so that the movable member can compress the deformable member or the movable member does not apply force to the deformable member. In this way, the moving component 130 is positioned at different locations, which changes the support stiffness of the elastic support device 100. The movable component 140 is positioned at different locations, which changes the support stiffness of the deformable component 180. The movable component 140 is positioned at different locations, which changes the support stiffness of the elastic support device 100. This can match the rotor shaft 204 at different speeds, avoid the critical speed of the rotor shaft 204, effectively suppress the peak vibration of the rotor shaft 204 within the working speed range of the rotor shaft 204, improve the rotor dynamic characteristics, reduce vibration, and reduce the vibration peak value. The moving component 130 and the movable component 140 are driven to move by electromagnetic components, which has high adjustment accuracy, fast response speed, and is reliable and durable.

[0091] The electromagnetic assembly includes a first electromagnetic component 151, which corresponds to a movable component 130 along the radial direction D2 of the cage component 110. The movable component 130 is movable relative to the cage component 110 along the radial direction D2. The movable component 130 is made of a magnetically conductive material, and the first electromagnetic component 151 is constructed as an electromagnet. When energized, the first electromagnetic component 151 generates a magnetic field, which drives the movable component 130 to move. The elastic support device 100 also includes a fastening component 162 for fixing the first electromagnetic component 151. The fastening component 162 fixes the first electromagnetic component 151 using bolts or other connecting parts.

[0092] When the first electromagnetic component 151 is energized, it can drive the movable component 130 to move toward the interior of the cage component 110. The first electromagnetic component 151 drives the movable component 130 to move relative to the cage component 110 between a first position and a second position. The movable component 130 is located in different positions, so that the elastic support device 100 has different stiffnesses to adapt to different rotational speeds of the rotor shaft 204, thus having a wide range of applications. Therefore, by moving the movable component 130 to different positions, the stiffness of the elastic support device 100 along the axial direction D1 of the cage component 110 can be changed.

[0093] like Figure 5 As shown, the movable member 130 in the first position is located within the cage member 110. The movable member 130 in the first position is located inside the cage member 110. Specifically, the movable member 130 in the first position is located between adjacent cage bars 111. The movable member 130 in the first position is located in the space 112. The movable member 130 in the first position is capable of filling the space 112 between adjacent cage bars 111.

[0094] The movable member 130 in the first position is in contact with the cage member 110. The edges of the movable member 130 in the first position are in contact with the cage member 110. Therefore, the movable member 130 in the first position enhances the stiffness of the elastic support device 100 along the axial direction D1 of the cage member 110. The combination of the movable member 130 in the first position and the cage member 110 improves the overall stiffness, thereby adapting to the rotor shaft 204 at the first rotational speed. The stiffness of the cage member 110 itself is k1, and the stiffness of the movable member 130 in the first position combined with the cage member 110 is k2, where k2 > k1. The stiffness of the movable member 130 in the first position along the axial direction D1 of the cage member 110 is superimposed on the stiffness of the cage member 110. Therefore, the stiffness of the movable member 130 in the first position combined with the cage member 110 along the axial direction D1 of the cage member 110 is improved.

[0095] like Figure 6As shown, the movable member 130 in the second position is spaced apart from the cage member 110. When the first electromagnetic member 151 is de-energized, the movable member 130 in the first position moves to the second position. The movable member 130 in the first position is located inside the cage member 110. The movable member 130 in the second position is located outside the cage member 110. The movable member 130 in the second position does not contact the cage member 110, thus adapting to the rotor shaft 204 operating at a second rotational speed.

[0096] For example, such as Figure 8 and Figure 9 As shown, when the moving member 130 is in the first position, the curve corresponding to the peak value of the imbalance of the elastic support device 100 is curve S1. For ease of distinction, in Figure 9 In the diagram, the S1 curve is shown in red. The peak of the S1 curve occurs when the rotor shaft 204 rotates between 7500 r / min and 10000 r / min. The S1 curve has a peak. When the first rotational speed of the rotor shaft 204 is less than 7500 r / min, the S1 curve is relatively flat. That is, when the first rotational speed of the rotor shaft 204 is less than 7500 r / min, the moving member 130 is in the first position. The moving member 130 in the first position, combined with the cage member 110, allows the elastic support device 100 to smoothly support the rotation of the rotor shaft 204 with minimal vibration.

[0097] When the moving member 130 is in the second position, the curve of the peak value corresponding to the imbalance of the elastic support device 100 is the S2 curve. For ease of distinction, in Figure 9 In the diagram, the S2 curve is shown in black. A peak in the S2 curve occurs when the rotor shaft 204 rotates between 5000 r / min and 7500 r / min. When the rotor shaft 204 rotates between 7500 r / min and 10000 r / min, the S2 curve is relatively flat. That is, when the second rotational speed of the rotor shaft 204 is greater than 7500 r / min, the moving member 130 is in the second position. The moving member 130 in the second position separates from the cage member 110, allowing the elastic support device 100 to smoothly support the rotation of the rotor shaft 204 with minimal vibration.

[0098] Specifically, when the first rotational speed of the rotor shaft 204 is between 0 and 7500 r / min, the first electromagnetic component 151 is energized to drive the moving component 130 to move to the first position. The moving component 130 in the first position is in contact with the cage component 110 to minimize vibration. In particular, the moving component 130 in the first position is in contact with the cage bars 111. When the second rotational speed of the rotor shaft 204 is between 7500 r / min and 10000 r / min, the first electromagnetic component 151 is de-energized to drive the moving component 130 to move to the second position. The moving component 130 in the second position separates from the cage component 110 to minimize vibration.

[0099] As a preferred embodiment, such as Figure 4 As shown, the first electromagnetic component 151 is located inside the cage component 110. The first electromagnetic component 151 is energized to drive the moving component 130 to move. The first electromagnetic component 151 can drive the moving component 130, located in the second position, to move towards the first electromagnetic component 151 to the first position. The first electromagnetic component 151 can also drive the moving component 130, located in the second position, to move along the radial direction D2 of the cage component 110 towards the interior of the cage component 110.

[0100] In another optional embodiment, the movable member 130 located in the second position is situated inside the cage member 110 along the radial direction D2. The first electromagnetic member 151 is located outside the cage member 110 along the radial direction D2. When energized, the first electromagnetic member 151 can drive the movable member 130 to move towards the outside of the cage member 110. The first electromagnetic member 151 is energized to drive the movable member 130 to move. The first electromagnetic member 151 can drive the movable member 130 located in the second position to move towards the first electromagnetic member 151. The first electromagnetic member 151 can drive the movable member 130 located in the second position to move towards the outside of the cage member 110 along the radial direction D2.

[0101] Furthermore, such as Figure 2As shown, the cage member 110 further includes a base 113 and an outer edge 114, both of which are connected to the cage bars 111. The base 113 is connected to one end of the cage bar 111 along the axial direction D1 of the cage member 110. Preferably, the base 113 and the cage bar 111 can be integrally formed. The base 113 includes the aforementioned rotor hole for connection with the rotor shaft 204. The rotor shaft 204 is rotatable relative to the base 113. A movable member 130 located in a first position is in contact with the base 113. The movable member 130 located in the first position is situated to the side of the base 113 along the axial direction D1 of the cage member 110. One end of the movable member 130 located in the first position along the axial direction D1 of the cage member 110 is in contact with the base 113. The base 113 and the cage bars 111 are vertically connected, making the edges of the space 112 neat, which facilitates processing and reduces the difficulty of fitting the moving component 130 to the cage bars 111 and the moving component 130 to the base 113.

[0102] The base 113 includes a ring and an extension, which are perpendicularly connected. The ring has the rotor hole described above. The extension extends from the edge of the ring toward the cage bars 111. The extension extends along the axial direction D1 of the cage member 110. The extension is connected to the cage bars 111. Preferably, the extension and the cage bars 111 are integrally formed. A plurality of cage bars 111 are connected to the extension. The plurality of cage bars 111 are spaced apart along the circumferential direction of the cage member 110. A movable member 130 located in a first position is in contact with the extension. The movable member 130 located in the first position is located to the side of the extension along the axial direction D1 of the cage member 110. One end of the movable member 130 located in the first position along the axial direction D1 of the cage member 110 is in contact with the extension.

[0103] The outer edge 114 is connected to the other end of the cage bar 111 along the axial direction D1 of the cage member 110. Preferably, the outer edge 114 and the cage bar 111 can be integrally formed. The fastening member 162 is connected to the outer edge 114. The cage member 110 also includes a flange 116, which is connected to the outer edge 114. The flange 116 and the outer edge 114 are connected together by welding. The flange 116 is arranged around a plurality of cage bars 111 along the circumferential direction of the cage member 110. The flange 116 is connected to the fastening member 162 by a connector. This fixes the cage member 110. The moving member 130 located in the first position is in contact with the outer edge 114. The moving member 130 located in the first position is located to the side of the outer edge 114 along the axial direction D1 of the cage member 110. The other end of the movable member 130 located in the first position along the axial direction D1 of the cage member 110 is in contact with the outer edge 114. The outer edge 114 and the cage bars 111 are vertically connected, making the edge of the space 112 neat, which facilitates processing and reduces the difficulty of contacting the movable member 130 with the cage bars 111 and the outer edge 114.

[0104] The movable member 130, located in the first position, is situated between the outer edge 114 and the base 113 to enhance the stiffness between the outer edge 114 and the base 113. Thus, by adjusting the controllable stiffness of the elastic support device 100 along the axial direction D1 of the cage member 110, the critical speed of the rotor shaft 204 can be adjusted, the vibration peak value of the rotor shaft 204 can be reduced, and active vibration control of the rotor shaft 204 can be achieved.

[0105] like Figure 3 As shown, the moving member 130 is constructed as a wedge-shaped block. The first electromagnetic member 151 is constructed as a square electromagnet. The shape of the first electromagnetic member 151 matches the shape of the moving member 130. The moving member 130 includes a main body 131, which is attached to the cage bars 111. The main body 131 is constructed as a cuboid structure. This facilitates processing and provides good rigidity. The main body 131 includes a first surface and a second surface, which face opposite directions. The first surface faces one cage bar 111. The first surface is attached to one cage bar 111 along the circumferential direction of the cage member 110. In particular, the first surface is attached to the surface of one cage bar 111 facing the main body 131. The second surface faces another cage bar 111. The second surface is attached to another cage bar 111 along the circumferential direction of the cage member 110. In particular, the second surface is attached to the surface of another cage bar 111 facing the main body 131.

[0106] The main body 131 is also in contact with the base 113. The main body 131 also includes a third surface and a fourth surface, which face opposite directions along the axial direction D1 of the cage member 110. The third surface faces the base 113. The third surface is in contact with the base 113 along the axial direction D1 of the cage member 110. The third surface is in contact with the surface of the base 113 facing the main body 131 along the axial direction D1 of the cage member 110. The fourth surface faces the outer edge 114. The fourth surface is in contact with the outer edge 114 along the axial direction D1 of the cage member 110. The fourth surface is in contact with the surface of the outer edge 114 facing the main body 131 along the axial direction D1 of the cage member 110.

[0107] Thus, the main body 131 is fitted with the adjacent cage bars 111 along the circumferential direction of the cage member 110, the main body 131 is fitted with the base 113 along the axial direction D1 of the cage member 110, and the main body 131 is fitted with the outer edge 114 along the axial direction D1 of the cage member 110. The main body 131 can fill the entire space 112 between adjacent cage bars 111, compensate for the stiffness of the cage member 110, and in particular compensate for the stiffness of the hollow space 112 between adjacent cage bars 111, thereby enhancing the structural strength of the cage member 110 and giving the elastic support device 100 good stiffness.

[0108] Combination Figure 2 As shown, the outer edge 114 includes a notch 115, which is recessed in a direction away from the base 113. The moving member 130 also includes a protrusion 132, which protrudes from the end of the main body 131. The protrusion 132 protrudes along the axial direction D1 of the cage member 110. The protrusion 132 is located in the notch 115 and fits against the edge of the notch 115. Thus, the protrusion 132 can compensate for the stiffness of the notch 115 and improve the structural strength of the cage member 110.

[0109] like Figure 1 As shown, the elastic support device 100 also includes a plurality of first electromagnetic components 151, which are spaced apart along the circumferential direction of the cage component 110. As an optional embodiment, the number of movable components 130 can be one, with one movable component 130 corresponding to one of the plurality of first electromagnetic components 151. When the plurality of first electromagnetic components 151 are energized, the magnetic force generated by the plurality of first electromagnetic components 151 acts on one movable component 130. This results in a stronger magnetic force, enabling rapid adsorption of the movable component 130 and improving efficiency.

[0110] In another alternative embodiment, the cage member 110 includes a plurality of cage bars 111, each cage bar 111 forming a plurality of spaces 112. The elastic support device 100 includes a plurality of movable members 130, which are spaced apart along the circumferential direction of the cage member 110. Each of the movable members 130 corresponds to a plurality of first electromagnetic members 151. The movable members 130 and the first electromagnetic members 151 correspond to each other along the radial direction D2 of the cage member 110. The first electromagnetic members 151 are energized, so that corresponding magnetic forces act on the movable members 130, thereby causing the movable members 130 to move. The movable members 130 can move into the plurality of spaces 112 respectively. Thus, the movable members 130 can compensate for the stiffness of the plurality of spaces 112, and the overall structural strength of the elastic support device 100 can be improved.

[0111] Optionally, the same first electromagnetic component 151 can simultaneously drive two moving components 130 to move. The first variable stiffness assembly also includes a first moving component and a second moving component, which are located on opposite sides of the cage component 110 along the radial direction D2. The first and second moving components are symmetrically arranged along the radial direction D2 of the cage component 110. The first and second moving components move in opposite directions. The same first electromagnetic component 151 can drive both the first and second moving components to move. When the same first electromagnetic component 151 is energized, the first and second moving components move in opposite directions. The first moving component moves towards the second moving component along the radial direction D2 of the cage component 110, such that the first moving component at the first position is located in the space 112 between two adjacent cage bars 111. The second moving component moves towards the first moving component along the radial direction D2 of the cage component 110, such that the second moving component at the first position is located in the space 112 between two other adjacent cage bars 111. This reduces the number of first electromagnetic components 151, lowers cost and weight, and improves efficiency.

[0112] When the electromagnetic component is energized, it can drive the movable member 140 in the fourth position to move toward the deformable member 180. When the electromagnetic component is de-energized, it can cause the movable member 140 in the third position to move away from the deformable member 180. The movable member 140 in the third position is closer to the cage member 110 than the movable member 140 in the fourth position.

[0113] like Figure 5As shown, the movable member 140 in the third position can compress the deformable member 180. When the electromagnetic component is energized, the movable member 140 in the fourth position moves to the third position. The movable member 140 in the fourth position is either in contact with or spaced from the deformable member 180. When the electromagnetic component is energized, the movable member 140 in the fourth position moves towards the interior of the deformable member 180 to the third position.

[0114] The movable member 140, located in the third position, can compress the deformable member 180. The deformable member 180 is compressed along the axial direction of the cage member 110, thereby increasing its stiffness. The deformable member 180 is fixed to the cage member 110 to stabilize its vibration, further enhancing the stiffness of the elastic support device 100 along the axial direction of the cage member 110. This improves the overall stiffness, thus adapting to the rotor shaft 204 at the first rotational speed. The deformable member 180 is compressed by the movable member 140; its stiffness before compression is k3, and its stiffness after compression is k4, where k4 > k3, thus increasing the stiffness of the elastic support device 100 along the axial direction of the cage member 110.

[0115] like Figure 6 As shown, the movable member 140 in the fourth position is either in contact with or spaced apart from the deformable member 180. When the electromagnetic assembly is de-energized, the movable member 140 in the third position moves to the fourth position. The movable member 140 in the fourth position does not exert any force on the deformable member 180, allowing the deformable member 180 to remain in a free state, thereby adapting to the rotor shaft 204 at the second rotational speed.

[0116] Combination Figure 8 As shown, when the movable member 140 is in the third position, the curve corresponding to the peak value of the imbalance of the elastic support device 100 is the S1 curve. The peak value of the S1 curve is located between 7500 r / min and 10000 r / min when the rotational speed of the rotor shaft 204 is less than 7500 r / min and greater than 1000 r / min. The S1 curve is relatively flat when the first rotational speed of the rotor shaft 204 is less than 7500 r / min. That is, when the first rotational speed of the rotor shaft 204 is less than 7500 r / min, the movable member 140 is in the third position. The movable member 140 in the third position compresses the deformation member 180, and the deformation member 180 is compressed and deformed, so that the elastic support device 100 can smoothly support the rotation of the rotor shaft 204 with less vibration.

[0117] When the movable member 140 is in the fourth position, the curve representing the peak value of the imbalance of the elastic support device 100 is the S2 curve. The peak value of the S2 curve is located between 5000 r / min and 7500 r / min and between 12500 r / min and 15000 r / min when the rotational speed of the rotor shaft 204 is between 7500 r / min and 10000 r / min. That is, when the second rotational speed w of the rotor shaft 204 is between 7500 r / min and 12500 r / min, the movable member 140 is in the fourth position. The movable member 140 in the fourth position is either in contact with or spaced from the deformation member 180. The movable member 140 in the fourth position does not apply force to the deformation member 180, so that the elastic support device 100 can smoothly support the rotation of the rotor shaft 204 with minimal vibration.

[0118] Specifically, when the rotor shaft 204 rotates at a first speed between 0 and 7500 r / min, the electromagnetic component is energized to drive the movable member 140 to move to a third position. The movable member 140 in the third position can compress the deformable member 180, resulting in less vibration. When the rotor shaft 204 rotates at a second speed between 7500 r / min and 10000 r / min, the electromagnetic component is de-energized to drive the movable member 140 to move to a fourth position. The movable member 140 in the fourth position is either in contact with or spaced from the deformable member 180, so that the movable member 140 in the fourth position does not exert force on the deformable member 180, thus resulting in less vibration.

[0119] The movable components 140 are located in different positions, and the movable components 140 in different positions can respectively cause the deformable component 180 to be in different states, so that the elastic support device 100 has different stiffnesses to adapt to different rotational speeds of the rotor shaft 204, thus having a wide range of applications. Therefore, by moving the movable components 140 to different positions, the stiffness of the elastic support device 100 along the axial direction of the cage component 110 can be changed.

[0120] The electromagnetic assembly also includes a second electromagnetic component 152, which corresponds to the movable component 140 along the axial direction of the cage component 110. The movable component 140 is movable relative to the cage component 110 along the axial direction of the cage component 110. The movable component 140 is made of a magnetically conductive material, and the second electromagnetic component 152 is constructed as an electromagnet. The second electromagnetic component 152 is connected to the cage component 110 by bolts or other connecting parts. The movable component 140 is constructed as a pressure plate. When the second electromagnetic component 152 is energized, it generates a magnetic field, and the magnetic force can drive the movable component 140 to move.

[0121] The movable member 140 is movable relative to the cage member 110 along the axial direction of the cage member 110. When the second electromagnetic member 152 is energized, it drives the movable member 140 to move towards the cage member 110. The second electromagnetic member 152 drives the movable member 140 to move relative to the cage member 110 between a third position and a fourth position. A deformable member 180 is fitted onto the cage member 110. The deformable member 180 is constructed as a metal-rubber ring. When the second electromagnetic member 152 is energized, it drives the movable member 140 in the fourth position to move towards the deformable member 180. When the second electromagnetic member 152 is de-energized, it causes the movable member 140 in the third position to move away from the deformable member 180. The movable member 140 in the third position is closer to the cage member 110 than the movable member 140 in the fourth position.

[0122] like Figure 5 As shown, the movable member 140 in the third position can compress the deformable member 180. The second electromagnetic member 152 is energized, causing the movable member 140 in the fourth position to move to the third position. The movable member 140 in the fourth position is either in contact with or spaced from the deformable member 180. The second electromagnetic member 152 is energized, causing the movable member 140 in the fourth position to move towards the interior of the deformable member 180 to the third position.

[0123] The movable member 140, located in the third position, can compress the deformable member 180. The deformable member 180 is compressed along the axial direction of the cage member 110, thereby increasing its stiffness. The deformable member 180 is fixed to the cage member 110 to stabilize the vibration of the cage member 110, thereby further enhancing the stiffness of the elastic support device 100 along the axial direction of the cage member 110. This improves the overall stiffness, thus adapting to the rotor shaft 204 at the first rotational speed. The deformable member 180 is compressed by the movable member 140; its stiffness before compression is k1, and its stiffness after compression is k2, where k2 > k1, thus increasing the stiffness of the elastic support device 100 along the axial direction of the cage member 110.

[0124] like Figure 6 As shown, the movable member 140 in the fourth position is either in contact with or spaced apart from the deformable member 180. When the second electromagnetic member 152 is de-energized, the movable member 140 in the third position moves to the fourth position. The movable member 140 in the fourth position does not apply any force to the deformable member 180, allowing the deformable member 180 to remain in a free state, thereby adapting to the rotor shaft 204 at the second rotational speed.

[0125] Combination Figure 8As shown, when the movable member 140 is in the third position, the curve corresponding to the peak value of the imbalance of the elastic support device 100 is the S1 curve. The peak value of the S1 curve is located between 7500 r / min and 10000 r / min when the rotational speed of the rotor shaft 204 is less than 7500 r / min and greater than 1000 r / min. The S1 curve is relatively flat when the first rotational speed of the rotor shaft 204 is less than 7500 r / min. That is, when the first rotational speed of the rotor shaft 204 is less than 7500 r / min, the movable member 140 is in the third position. The movable member 140 in the third position compresses the deformation member 180, and the deformation member 180 is compressed and deformed, so that the elastic support device 100 can smoothly support the rotation of the rotor shaft 204 with less vibration.

[0126] When the movable member 140 is in the fourth position, the curve representing the peak value of the imbalance of the elastic support device 100 is the S2 curve. The peak value of the S2 curve is located between 5000 r / min and 7500 r / min and between 12500 r / min and 15000 r / min when the rotational speed of the rotor shaft 204 is between 7500 r / min and 10000 r / min. That is, when the second rotational speed w of the rotor shaft 204 is between 7500 r / min and 12500 r / min, the movable member 140 is in the fourth position. The movable member 140 in the fourth position is either in contact with or spaced from the deformation member 180. The movable member 140 in the fourth position does not apply force to the deformation member 180, so that the elastic support device 100 can smoothly support the rotation of the rotor shaft 204 with minimal vibration.

[0127] Specifically, when the rotor shaft 204 rotates at a first speed between 0 and 7500 r / min, the electromagnetic component is energized to drive the movable member 140 to move to a third position. The movable member 140 in the third position can compress the deformable member 180, resulting in less vibration. When the rotor shaft 204 rotates at a second speed between 7500 r / min and 10000 r / min, the electromagnetic component is de-energized to drive the movable member 140 to move to a fourth position. The movable member 140 in the fourth position is either in contact with or spaced from the deformable member 180, so that the movable member 140 in the fourth position does not exert force on the deformable member 180, thus resulting in less vibration.

[0128] The movable components 140 are located in different positions, and the movable components 140 in different positions can respectively cause the deformable component 180 to be in different states, so that the elastic support device 100 has different stiffnesses to adapt to different rotational speeds of the rotor shaft 204, thus having a wide range of applications. Therefore, by moving the movable components 140 to different positions, the stiffness of the elastic support device 100 along the axial direction of the cage component 110 can be changed.

[0129] As a preferred embodiment, such as Figure 4 As shown, the second electromagnetic component 152 is located outside the cage component 110 along the radial direction of the cage component 110. The second electromagnetic component 152 is energized to drive the movable component 140 to move. The second electromagnetic component 152 can drive the movable component 140 located in the fourth position to move towards the second electromagnetic component 152. The second electromagnetic component 152 can also drive the movable component 140 located in the fourth position to move towards the second electromagnetic component 152 along the axial direction of the cage component 110. Of course, the second electromagnetic component 152 can also be located inside the cage component 110 along the radial direction of the cage component 110. The position of the second electromagnetic component 152 corresponds to the position of the movable component 140, so that the second electromagnetic component 152, when energized, can drive the movable component 140 to move.

[0130] This application uses an elastic support device 100 with controllable stiffness of a metal rubber ring to adjust the critical speed of the rotor shaft 204, reduce the vibration peak value of the rotor shaft 204, and achieve active vibration control of the rotor shaft 204.

[0131] The deformable member 180 is located outside the cage member 110. The deformable member 180 is fitted onto the base 113. The deformable member 180 is fixed to the base 113. Changes in the stiffness of the deformable member 180 affect the vibration of the base 113, and consequently, the vibration of the cage member 110. When the deformable member 180 is compressed, its stiffness increases, thus reducing the vibration of the cage member 110 when the rotor shaft 204 is at a first rotational speed. When the deformable member 180 is uncompressed and in a free state, the vibration of the cage member 110 decreases when the rotor shaft 204 is at a second rotational speed.

[0132] like Figure 1As shown, the movable member 140 is constructed in a ring shape. The movable member 140 includes a body portion 141, which is disposed opposite to the second electromagnetic member 152 along the axial direction of the cage member 110. The body portion 141 is constructed in a ring shape, which facilitates processing and provides good rigidity. The body portion 141 is made of a magnetically conductive material. This allows the magnetic force of the second electromagnetic member 152 to act on the body portion 141, enabling the body portion 141 to drive the entire movable member 140 to move. When the second electromagnetic member 152 is energized, the magnetic force generated by the second electromagnetic member 152 acts on the body portion 141 to drive its movement. For example, energizing the second electromagnetic member 152 can attract the body portion 141 to move towards the second electromagnetic member 152 along the axial direction of the cage member 110. When the second electromagnetic member 152 is de-energized and does not generate a magnetic force, the body portion 141 moves away from the second electromagnetic member 152 along the axial direction of the cage member 110.

[0133] The movable member 140 also includes a pressing portion 142, which is connected to the body portion 141. The thickness direction of the body portion 141 is parallel to the axial direction of the cage member 110. The thickness direction of the pressing portion 142 is parallel to the radial direction of the cage member 110. The pressing portion 142 protrudes from the body portion 141 along the axial direction of the cage member 110 toward the deformable member 180. Figure 4 As shown, the extrusion section 142 is located between the main body section 141 and the deformation member 180 along the axial direction of the cage member 110. When the second electromagnetic member 152 is energized, it can drive the main body section 141 to move, thereby driving the extrusion section 142 to move.

[0134] The second electromagnetic component 152 and the deformation component 180 are located on the same side of the movable component 140 along the axial direction of the cage component 110. For example... Figure 5 and Figure 6As shown, the second electromagnetic component 152 is energized to attract the body portion 141 located at the fourth position, enabling it to move towards the deformable member 180. The second electromagnetic component 152, when energized, attracts the body portion 141 located at the fourth position, enabling it to move along the axial direction of the cage member 110 towards the second electromagnetic component 152, thereby causing the pressing portion 142 located at the fourth position to move towards the deformable member 180. The pressing portion 142 located at the third position can press the deformable member 180. Thus, the pressing portion 142 can compress the deformable member 180, causing a change in the stiffness of the deformable member 180. The body portion 141 located at the third position abuts against the second electromagnetic component 152. Therefore, the second electromagnetic component 152 can also limit the movement of the movable member 140 along the axial direction of the cage member 110. The distance between the main body 141 located in the fourth position and the second electromagnetic member 152 can be adjusted, thereby adjusting the amount of compression of the extrusion part 142 on the deformation member 180, and thus adjusting the stiffness of the deformation member 180.

[0135] The deformable member 180 is constructed as a metal-rubber ring. The deformable member 180 is capable of elastic deformation along the axial direction of the cage member 110. When the second electromagnetic member 152 is energized, the compression portion 142 at the third position can compress the deformable member 180, causing it to elastically deform. When the second electromagnetic member 152 is de-energized, the deformable member 180 elastically deforms, thereby applying an elastic force to the compression portion 142 at the third position. The deformable member 180 applies an elastic force away from the compression portion 142 at the third position, causing the compression portion 142 at the third position to move to a fourth position. The body portion 141 at the fourth position is spaced apart from the second electromagnetic member 152. The compression portion 142 at the fourth position is either in contact with or spaced apart from the deformable member 180. The compression portion 142 at the fourth position does not compress the deformable member 180. The compression portion 142 at the fourth position does not apply force to the deformable member 180.

[0136] The elastic support device 100 also includes a plurality of second electromagnetic components 152, which are spaced apart along the circumferential direction of the cage component 110. As an optional embodiment, the number of movable components 140 can be one, with one movable component 140 corresponding to one of the plurality of second electromagnetic components 152. When the plurality of second electromagnetic components 152 are energized, the magnetic force generated by the plurality of second electromagnetic components 152 acts on one movable component 140. This results in a stronger magnetic force, enabling rapid adsorption of the movable component 140 and improving efficiency.

[0137] The elastic support device 100 also includes a fixing member 160 for fixing the cage member 110. The fixing member 160 is constructed as a hollow cylindrical structure. The axial direction of the fixing member 160 is parallel to the axial direction D1 of the cage member 110. The fixing member 160 includes a receiving chamber 161 that receives the cage member 110. The flange 116 of the cage member 110 is connected to the fixing member 160. The flange 116 of the cage member 110 is connected to the fixing member 160 by a fastening member 162. The flange 116 of the cage member 110 is located between the fastening member 162 and the fixing member 160. The flange 116 of the cage member 110, the fastening member 162, and the fixing member 160 are connected together by a connector. The cage member 110 and the fixing member 160 are relatively stationary. The rotor shaft 204 rotates relative to the fixing member 160.

[0138] The elastic support device 100 further includes a first guide member 173 and a first mating member 134, the first mating member 134 being disposed on the movable member 130. The first guide member 173 and the first mating member 134 are connected together. The first guide member 173 can be constructed as a column, and the first mating member 134 can be constructed as a hole. The first guide member 173 is inserted into the first mating member 134 on the movable member 130 and fixed together by a threaded connection. The fixed member 160 is provided with a through hole, the axial direction of which is parallel to the radial direction of the cage member 110. The first guide member 173 is inserted into the through hole. The first guide member 173 is movable relative to the through hole along the radial direction D2 of the cage member 110, thereby guiding the movable member 130 to move linearly along the radial direction D2 of the cage member 110. Thus, the first guide member 173 can guide the movable member 130, preventing the movable member 130 from deviating, so as to avoid the movable member 130 failing to move into place and thus failing to be positioned between adjacent cage bars 111.

[0139] To facilitate the repositioning of the movable component 130, combined with Figure 4 As shown, the elastic support device 100 also includes an elastic member 170, which connects the fixed member 160 and the movable member 130. The elastic member 170 is constructed as a disc spring. The elastic member 170 is capable of elastic deformation along the radial direction D2 of the cage member 110. The elastic member 170 is capable of driving the movable member 130, which is located in the first position, to move to the second position.

[0140] like Figure 5 and Figure 6As shown, one end 171 of the elastic member 170 along the radial direction D2 of the cage member 110 abuts against the first guide member 173. One end 171 of the elastic member 170 abuts against the nut of the first guide member 173. The movement of the moving member 130 drives the first guide member 173 to move, and the movement of the first guide member 173 compresses the elastic member 179, so that the elastic member 170 deforms.

[0141] The other end 172 of the elastic member 170 along the cage member 110 abuts against the fixed member 160. In this way, the fixed member 160 constrains the other end 172 of the elastic member 170.

[0142] The first electromagnetic component 151, when energized, generates a magnetic field to drive the moving component 130 to move. For example, the first electromagnetic component 151 can attract the moving component 130. The first electromagnetic component 151 can drive the moving component 130, located in the second position, to move along the radial direction D2 of the cage component 110 toward the interior of the cage component 110 to the first position. The movement of the moving component 130 causes the first guide component 173 to move, resulting in elastic deformation of the elastic component 170. When the first electromagnetic component 151 is de-energized, it does not generate a magnetic force, thus not driving the moving component 130 to move. The elastic component 170 can generate elastic deformation along the radial direction D2 of the cage component 110, and the elastic component 170 applies an elastic force to the first guide component 173 in a direction away from the first electromagnetic component 151, so that the moving component 130 located in the first position moves to the second position. Thus, the elastic component 170 can reset the moving component 130, and the reset of the moving component 130 is controlled by mechanical means, which has high reliability.

[0143] To ensure the linear movement of the movable member 140, the second variable stiffness assembly further includes a second guide member 174 and a second mating member 144. The second guide member 174 guides the movement of the movable member 140. The second guide member 174 is parallel to the axial direction of the cage member 110. The second mating member 144 is disposed to the movable member 140. The second guide member 174 and the second mating member 144 are connected to guide the movable member 140 to move along the axial direction of the cage member 110. Preferably, one of the second guide member 174 and the second mating member 144 is a hole, and the other is a pin, with the pin inserted into the hole. The axial direction of the pin is parallel to the axial direction of the cage member 110. The axial direction of the hole is also parallel to the axial direction of the cage member 110. Thus, the second guide member 174 can guide the movable member 140, preventing it from shifting and thus ensuring the movable member 140 can move into place.

[0144] The second electromagnetic component 152 is also located outside the fixed component 160 to correspond with the main body 141. The second electromagnetic component 152 is located outside the fixed component 160 along the radial direction of the cage component 110. When the second electromagnetic component 152 is energized, it generates a magnetic field to drive the movable component 140 to move. For example, the second electromagnetic component 152 can attract the movable component 140. The second electromagnetic component 152 can drive the movable component 140 located in the fourth position to move towards the interior of the cage component 110 along the axial direction of the cage component 110 to the third position. The movable component 140 moves to cause the deformation component 180 to undergo elastic deformation. When the second electromagnetic component 152 is de-energized, it does not generate a magnetic force, thereby not driving the movable component 140 to move. The deformation component 180 generates an elastic force on the movable component 140 located in the third position, and the deformation component 180 can undergo elastic deformation along the axial direction of the cage component 110 to move the movable component 140 located in the third position to the fourth position. Therefore, the deformable component 180 can reset the movable component 140, and the reset of the movable component 140 is controlled by mechanical means, which has high reliability.

[0145] To support the second electromagnetic component 152, the fixing component 160 further includes a protruding plate 163, which protrudes towards the movable component 140 along the axial direction of the cage component 110. The protruding plate 163 supports the second electromagnetic component 152 to prevent it from falling off. Figure 4 As shown, a deformation member 180 is also provided between the protruding plate 163 and the cage member 110. The deformation member 180 is provided between the protruding plate 163 and the cage member 110 along the radial direction of the cage member 110. The protruding plate 163 is located outside the deformation member 180 along the radial direction of the cage member 110. The protruding plate 163 serves to limit the deformation member 180 to prevent the deformation member 180 from falling off the cage member 110 due to vibration of the rotor shaft 204.

[0146] The protruding plate 163 forms a deformation chamber with the cage member 110 along the radial direction. The deformation member 180 is located in the deformation chamber. A portion of the extrusion portion 142 located in the fourth position is located in the deformation chamber. The projection of the protruding plate 163 along the radial direction of the cage member 110 partially coincides with the projection of the extrusion portion 142 located in the fourth position. The extrusion portion 142 located in the third position can be at least partially and entirely located in the deformation chamber. The protruding plate 163 is located outside the extrusion portion 142 along the radial direction of the cage member 110. In this way, the protruding plate 163 can guide the movement of the extrusion portion 142 along the axial direction of the cage member 110 and prevent the extrusion portion 142 from shifting.

[0147] The second electromagnetic component 152 is constructed as a cylindrical electromagnet. The fixing component 160 further includes a fixing plate 164, which is connected to the protruding plate 163. The fixing plate 164 and the protruding plate 163 are perpendicularly connected. The fixing plate 164 is constructed as a ring structure. The fixing plate 164 surrounds the cage component 110. The second electromagnetic component 152 is connected to the fixing plate 164. The axial direction of the second electromagnetic component 152 is parallel to the axial direction of the cage component 110. The second electromagnetic component 152 is connected to the fixing plate 164 by bolts or other connecting parts. The deformation component 180 is located between the movable component 140 and the fixed component 160 along the axial direction of the cage component 110. Preferably, the deformation component 180 is located between the extrusion part 142 and the fixing plate 164 along the axial direction of the cage component 110.

[0148] The elastic support device 100 includes a plurality of second electromagnetic components 152, which are spaced apart along the circumferential direction of the cage component 110. Each of the second electromagnetic components 152 is fixed to a fixing plate 164. The fixing plate 164 is parallel to the main body 141. This allows each of the second electromagnetic components 152 to apply a magnetic force to the main body 141.

[0149] As described above, the elastic support device 100 also includes a second guide member 174 and a second mating member 144. The second guide member 174 may also be disposed to the fixed member 160, and the second mating member 144 may be disposed to the movable member 140. The second guide member 174 may be constructed as a pin, and the second mating member 144 may be constructed as a hole. The second guide member 174 may be connected to the fixing plate 164 of the fixed member 160. The second guide member 174 and the fixing plate 164 are connected together by a threaded connection. The second guide member 174 is inserted into the second mating member 144 on the movable member 140, that is, the pin is inserted into the hole of the movable member 140, so as to guide the movable member 140 to move in the axial direction of the second guide member 174. In particular, the second guide member 174 and the second mating member 144 are mated together to guide the movable member 140 to move linearly in the axial direction of the cage member 110.

[0150] The control system controls the rotation of the rotor shaft 204. The control system includes a speed acquisition component, an A / D conversion system, a computer, a power amplifier, and a programmable DC power supply. The speed acquisition component is configured as an eddy current displacement sensor 201, located to the side of the elastic support device 100, to measure the vibration displacement of the elastic support device 100. The programmable DC power supply provides power to the first electromagnetic component 151 and the second electromagnetic component 152, energizing or de-energizing the first electromagnetic component 151. The A / D conversion system includes an analog-to-digital converter.

[0151] When the eddy current displacement sensor 201 detects that the rotational speed of the rotor shaft 204 is close to the critical speed (i.e., the rotational speed of the rotor shaft 204 is close to 7500 r / min), it transmits a signal to the computer through the A / D conversion system. The computer sends a power-on command to the programmable DC power supply through the analog-to-digital converter and the power amplifier, driving the programmable DC power supply to supply appropriate current and voltage to the first electromagnetic component 151 and the second electromagnetic component 152 respectively.

[0152] When the first electromagnetic component 151 is energized, it attracts the moving component 130 to move along the radial direction D2 of the cage component 110. Under the action of electromagnetic force, the moving component 130 moves to a first position to make close contact with the cage bars 111. When the second electromagnetic component 152 is energized, it attracts the movable component 140 to move along the axial direction of the cage component 110. Under the action of electromagnetic force, the movable component 140 moves to a third position to compress the deformable component 180. The stiffness of the deformable component 180 changes with the axial compression, thereby changing the stiffness of the elastic support device 100, achieving the effect of avoiding the critical speed and reducing the vibration peak value.

[0153] The computer sends a power-off command to the programmable DC power supply via an analog-to-digital converter and a power amplifier, causing the programmable DC power supply to shut down. After the first electromagnetic component 151 is de-energized, under the action of the elastic component 170, the moving component 130 moves in the opposite direction along the radial direction D2 of the cage component 110. The moving component 130 moves to a second position to be spaced apart from the cage component 110. After the second electromagnetic component 152 is de-energized, under the action of the deformation component 180, the movable component 140 moves in the opposite direction along the axial direction of the cage component 110. The movable component 140 moves to a fourth position to no longer apply force to the deformation component 180.

[0154] Thus, by adjusting the contact and separation between the moving member 130 and the cage bars 111, and by adjusting the relative position between the movable member 140 and the deformable member 180, the support stiffness is changed. The compression of the deformable member 180 varies between 0 and 0.6 mm.

[0155] like Figure 8 and Figure 9 As shown by curve S1, when the moving member 130 is in contact with the cage bar 111 under the action of electromagnetic force and the movable member 140 is pressing against the deformable member 180 under the action of electromagnetic force, the support stiffness of the elastic support device 100 is 1.4 × 10⁻⁶. 7 N / m. (See figure) Figure 9 As shown by the S2 curve, when the moving member 130 disengages from the cage bars 111 and the movable member 140 does not exert any force on the deforming member 180, the support stiffness of the elastic support device 100 is 8.5 × 10⁻⁶. 6 N / m.

[0156] When the moving member 130 is in the first position, the sum of the length of the moving member 130 in the first position, the length of the base 113, and the length of the outer edge 114 is 78 mm. When the moving member is in the second position, the sum of the length of the base 113 and the length of the outer edge 114 is 5 mm. This significantly improves the effective stiffness of the elastic support device. When the length of the elastic support device along the axial direction of the cage member varies between 5 mm and 78 mm, and the compression of the metal rubber ring varies between 0 and 0.6 mm, the total stiffness of the elastic support device varies between 8.5E6 and 1.4E7 N / m, and the peak value of the rotor shaft is reduced by more than 50%.

[0157] To quantify and verify the effect of moving components located at different positions on the stiffness change of the entire elastic support device, such as Figure 7 As shown, the elastic support device 100 is mounted on the test bench 200 to form a static stiffness characteristic test bench. The test bench 200 supports the elastic support device 100. The rotor shaft 204 is connected to the elastic support device 100. The rotor shaft 204 protrudes from the elastic support device 100 along the axial direction D1 of the cage member 110. The elastic support device 100 is located at the middle of the rotor shaft 204. Weights are suspended at both ends of the rotor shaft 204 along the axial direction. A first weight 202 is suspended at one end of the rotor shaft 204 along the axial direction, and a second weight 203 is suspended at the other end of the rotor shaft 204 along the axial direction. The first weight 202 and the second weight 203 are symmetrically arranged.

[0158] An eddy current displacement sensor 201 is also provided on the side of the elastic support device 100. The eddy current displacement sensor 201 is used to detect the deformation range of the elastic support device 100. The eddy current displacement sensor 201 is fixed in the installation position to eliminate the influence of the installation position on the test results. The rotor shaft 204 rotates at different speeds, and the eddy current displacement sensor 201 can measure the different deformation ranges of the elastic support device 100 respectively.

[0159] A 20kg load corresponds to 196N, a 40kg load to 392N, a 60kg load to 588N, an 80kg load to 784N, and a 100kg load to 980N. The displacement changes during loading and unloading are recorded. Three cage stiffness tests are conducted for each group of experiments. The tests include stiffness tests with and without energizing the first electromagnetic component 151, stiffness tests with and without energizing the second electromagnetic component 152, and stiffness tests with the first and second electromagnetic components 151 connected in parallel and energized. After the tests, the collected data is saved, and the computer is shut down.

[0160] Figure 10A load-displacement curve is shown, wherein both the first electromagnetic component 151 and the second electromagnetic component 152 are de-energized, the moving component 130 is in the second position, and the movable component 140 is in the fourth position. The horizontal axis shows the displacement of the elastic support device 100, and the vertical axis shows the load of the two weights applied to the rotor shaft 204. The load refers to the total weight of the first weight 202 and the second weight 203. The first weight 202 is loaded multiple times. The second weight 203 is loaded multiple times. It can be understood that the first weight 202 and the second weight 203 are simultaneously subjected to the same weight of load. Figure 10 In the diagram, different colored lines indicate different load conditions. The eddy current displacement sensor 201 detects different displacements of the elastic support device 100.

[0161] This yields the load-displacement curve of the controllable stiffness elastic support device 100. The slope K of the displacement-load curve represents the static stiffness of the elastic support device 100. The stiffness under a certain working condition is the average of the slopes of the displacement-load curves for each loading or unloading operation, i.e.

[0162]

[0163] In the above formula, K i This represents the slope for each load and unload operation. There are a total of 3 load and unload operations, resulting in 6 sets of slopes from K1 to K6. This represents the sum of K1 to K6, where n = 6, i.e., K i The number of K values ​​represents the static stiffness after taking the average value.

[0164] Figure 11 Another load-displacement curve is shown, in which both the first electromagnetic component 151 and the second electromagnetic component 152 are energized, the moving component 130 is in the first position, and the movable component 140 is in the third position. The horizontal axis shows the displacement of the elastic support device 100, and the vertical axis shows the load of the two weights applied to the rotor shaft 204. The load refers to the total weight of the first weight 202 and the second weight 203. The first weight 202 is loaded multiple times. The second weight 203 is loaded multiple times. It can be understood that the first weight 202 and the second weight 203 are simultaneously subjected to the same weight of load. Figure 11 In the diagram, different colored lines indicate different load conditions. The eddy current displacement sensor 201 detects different displacements of the elastic support device 100.

[0165] This yields the load-displacement curve of the controllable stiffness elastic support device 100. The slope K of the displacement-load curve represents the static stiffness of the elastic support device 100. The stiffness under a certain working condition is the average of the slopes of the displacement-load curves for each loading or unloading operation, i.e.

[0166]

[0167] In the above formula, K i This represents the slope for each load and unload operation. There are a total of 3 load and unload operations, resulting in 6 sets of slopes from K1 to K6. This represents the sum of K1 to K6, where n = 6, i.e., K i The number of K values ​​represents the static stiffness after taking the average value.

[0168] Actual measurements show that the stiffness of the elastic support device when it is not energized is 8.5E6 N / m, and the stiffness of the elastic support device when it is energized is 1.4E7 N / m, with a stiffness adjustment range of 64.71%.

[0169] A speed sensor is installed on the rotor shaft 204 to monitor its rotational speed. When the rotor shaft 204 rotates, the rotor speed detected by the speed sensor is transmitted to an analog-to-digital converter (ADC) via a speed signal, and then transmitted to a computer. When the speed sensor detects that the rotor speed is approaching a critical speed, the computer sends a command to the programmable DC power supply via a power amplifier, and the programmable DC power supply begins to supply DC power to the electromagnet. After the electromagnet is energized, the attraction moving member 130 moves downward along the radial direction D2 of the cage member 110, thereby making close contact with the cage bars 111 and changing the support stiffness. The formula for the stiffness change of the elastic support device 100 is:

[0170]

[0171] In the above formula, n is the number of cage bars 111, E is the Young's modulus of the cage bar 111 material, b is the width of the cage bar 111, h is the height of the cage bar 111, and L is the effective length of the cage bar 111.

[0172] After the electromagnet is energized, the attracting movable component moves along the axial direction of the cage component 110 to compress the metal rubber ring, thereby changing the support stiffness. The formula for the stiffness change of the elastic support device 100 is:

[0173]

[0174] In the above formula, E0 represents the elastic modulus of the metal-rubber ring; P represents the helical coil pitch, which refers to the length of one complete cycle of the periodically repeating helical wire, as the metal-rubber ring is made of helical metal wire; L represents the axial length of the metal-rubber ring; d0 represents the diameter of the metal wire, which refers to the diameter of the helical metal wire itself that makes up the periodically repeating helical wire; d represents the inner diameter of the metal-rubber ring; h represents the radial thickness of the metal-rubber ring; "φ" represents the porosity of the metal-rubber ring, which is defined as the ratio of the total volume occupied by the metal wire in the metal-rubber ring to the total volume of the metal-rubber ring (since the metal wire in the metal-rubber ring is not tightly arranged, and there is air in addition to the metal wire, the porosity is less than 1); d s B1, C1, and D1 represent the diameter of the spiral coil of metal wire in the metal-rubber ring; these are empirical coefficients and need to be specifically corrected by experiments before they can be applied to a metal-rubber ring of a certain size; x represents the radial deformation.

[0175] When the electromagnet is not energized, the metal rubber ring is not compressed, the squirrel cage bars do not contact the wedge block, and the support stiffness is 8.5E. 6 N / m. When the electromagnet is energized, the metal rubber ring is compressed by 0.6 mm, the wedge block makes close contact with the squirrel cage bars, the length of the squirrel cage bars decreases from 78 mm to 5 mm, and the support stiffness increases to 1.4E. 7 N / m. Due to the influence of the electromagnet being energized, the stiffness of the variable stiffness combined elastic support device increases, which leads to an increase in the critical speed of the rotor shaft, thereby effectively reducing the resonance peak.

[0176] As the rotor shaft speed continues to increase, the speed sensor detects that the rotor speed is approaching the critical speed for high stiffness and transmits the speed signal to the computer via an analog-to-digital converter. The computer sends a command to the DC power supply via a power amplifier, and the DC power supply stops supplying power. The electromagnet loses power and its magnetism disappears. The movable component 140, located in the first position, moves to the second position under the reaction force of the metal rubber ring. The wedge block disengages from the squirrel cage bars, the support stiffness decreases, and the rotor's critical speed decreases accordingly, avoiding the rotor shaft speed at this time, effectively suppressing the peak vibration of the rotor shaft.

[0177] The rotor support stiffness variation range caused by the extrusion deformation of the movable component 140 and the deformable component 180 in this application is 8.5E. 6 N / m to 1.4E 7 With a stiffness adjustment range of 64.71%, the rotor vibration peak value is reduced by more than 50%, effectively suppressing rotor peak vibration within the operating speed range of the rotor shaft and improving rotor dynamic characteristics.

[0178] The rotor shaft rotates at a first speed. When the electromagnet is energized, the moving member 130 moves to a first position along the radial direction D2 of the cage member 110. The moving member 130 in the first position makes close contact with the cage bars 111, causing the movable member 140 to move to a third position along the axial direction D1 of the cage member 110. The movable member 140 in the third position compresses the deforming member 180. The overall structural stiffness of the elastic support device 100 is 1.4 × 10⁻⁶. 7 N / m. In this way, the stiffness of the elastic support device 100 increases, which leads to an increase in the critical speed of the rotor shaft 204, thereby effectively reducing the resonance peak.

[0179] When the rotational speed of rotor shaft 204 continues to rise to the second rotational speed, the speed sensor detects that the rotor speed is approaching the critical speed for high stiffness and transmits the speed signal to the computer via an analog-to-digital converter. The computer sends a command to the DC power supply through a power amplifier, and the DC power supply stops supplying power. The electromagnet is de-energized, its magnetism disappears, and the moving member 130 moves to the second position along the radial direction D2 of the cage member 110 under the force of the elastic member 170. The moving member 130 in the second position is spaced apart from the cage member 110. The movable member 140 moves to the fourth position along the axial direction D1 of the cage member 110 under the force of the deformation member 180. The movable member 140 in the fourth position does not exert any force on the deformation member 180. In this way, the stiffness of the elastic support device 100 decreases, and the critical speed of rotor shaft 204 decreases accordingly, thus avoiding the rotational speed of rotor shaft 204 at this time and effectively suppressing the peak vibration of rotor shaft 204.

[0180] This application also provides a control method employing the aforementioned elastic support device 100. The elastic support device 100 is used for the rotor shaft 204 of the engine. The cage member 110 is connected to the rotor shaft 204. The elastic support device 100 also includes a deformation member 180. The movable member 140 in the fourth position does not exert a force on the deformation member 180.

[0181] Control methods include:

[0182] When the rotor shaft 204 rotates at a first speed, the electromagnetic component is energized, causing the movable member 130, located in the second position, to move to the first position. The movable member 140, located in the fourth position, moves to the third position. The movable member 130 in the first position is in contact with the cage member 110. The movable member 140 in the third position is able to compress the deformable member 180.

[0183] The first rotational speed is less than 7500 r / min. The imbalance response curves of the elastic support device 100 measured in the first position (moving member 130) and the third position (movable member 140) are curves S1. Thus, the moving member 130 in the first position and the movable member 140 in the third position can reduce the vibration of the rotor shaft 204 rotating at the first rotational speed.

[0184] When the rotor shaft 204 rotates at the second speed, the electromagnetic assembly is de-energized, causing the movable member 130 in the first position to move to the second position. The movable member 140 in the third position moves to the fourth position. The movable member 130 in the second position is spaced apart from the cage member 110. The movable member 140 in the fourth position does not exert a force on the deformable member 180.

[0185] The second rotational speed is between 7500 r / min and 10000 r / min. The imbalance response curves of the elastic support device 100 measured in the second position (moving member 130) and the fourth position (movable member 140) are S2 curves. Thus, the moving member 130 in the second position and the movable member 140 in the fourth position can reduce the vibration of the rotor shaft 204 rotating at the second rotational speed.

[0186] According to the control method of this application, the control method employs the aforementioned elastic support device, which is used for the rotor shaft 204 of the engine. The cage member 110 is connected to the rotor shaft 204. The elastic support device also includes a deformation member. The control method includes: when the rotor shaft 204 rotates at a first speed, the electromagnetic component is energized to move the moving member 130 to a first position and the movable member 140 to a third position. The moving member in the first position is located between adjacent cage bars, and the movable member in the third position presses against the deformation member. When the rotor shaft 204 rotates at a second speed, the electromagnetic component is de-energized to move the moving member 130 to the second position and the movable member 140 to a fourth position. The moving member in the second position is spaced apart from the cage member, and the movable member in the fourth position does not apply force to the deformation member. The first speed is less than the second speed. In this way, the moving component 130 is positioned at different locations, which changes the support stiffness of the elastic support device 100. The movable component 140 is positioned at different locations, which changes the support stiffness of the deformable component 180. The movable component 140 is positioned at different locations, which changes the support stiffness of the elastic support device 100. This can match the rotor shaft 204 at different speeds, avoid the critical speed of the rotor shaft 204, effectively suppress the peak vibration of the rotor shaft 204 within the working speed range of the rotor shaft 204, improve the rotor dynamic characteristics, reduce vibration, and reduce the vibration peak value. The moving component 130 and the movable component 140 are driven to move by electromagnetic components, which has high adjustment accuracy, fast response speed, and is reliable and durable.

[0187] To quantify and verify the effect of moving components located at different positions on the stiffness change of the entire elastic support device, such as Figure 7 As shown, the elastic support device 100 is mounted on the test bench 200 to form a static stiffness characteristic test bench. The test bench 200 supports the elastic support device 100. The rotor shaft 204 is connected to the elastic support device 100. The rotor shaft 204 protrudes from the elastic support device 100 along the axial direction D1 of the cage member 110. The elastic support device 100 is located at the middle of the rotor shaft 204. Weights are suspended at both ends of the rotor shaft 204 along the axial direction. A first weight 202 is suspended at one end of the rotor shaft 204 along the axial direction, and a second weight 203 is suspended at the other end of the rotor shaft 204 along the axial direction. The first weight 202 and the second weight 203 are symmetrically arranged.

[0188] An eddy current displacement sensor 201 is also provided on the side of the elastic support device 100. The eddy current displacement sensor 201 is used to detect the deformation range of the elastic support device 100. The eddy current displacement sensor 201 is fixed in the installation position to eliminate the influence of the installation position on the test results. The rotor shaft 204 rotates at different speeds, and the eddy current displacement sensor 201 can measure the different deformation ranges of the elastic support device 100 respectively.

[0189] A 20kg load corresponds to 196N, a 40kg load to 392N, a 60kg load to 588N, an 80kg load to 784N, and a 100kg load to 980N. The displacement changes during loading and unloading are recorded. Three cage stiffness tests are conducted for each group of experiments. The tests include stiffness tests with and without energizing the first electromagnetic component 151, stiffness tests with and without energizing the second electromagnetic component 152, and stiffness tests with the first and second electromagnetic components 151 connected in parallel and energized. After the tests, the collected data is saved, and the computer is shut down.

[0190] Figure 10 A load-displacement curve is shown, wherein both the first electromagnetic component 151 and the second electromagnetic component 152 are de-energized, the moving component 130 is in the second position, and the movable component 140 is in the fourth position. The horizontal axis shows the displacement of the elastic support device 100, and the vertical axis shows the load of the two weights applied to the rotor shaft 204. The load refers to the total weight of the first weight 202 and the second weight 203. The first weight 202 is loaded multiple times. The second weight 203 is loaded multiple times. It can be understood that the first weight 202 and the second weight 203 are simultaneously subjected to the same weight of load. Figure 10 In the diagram, different colored lines indicate different load conditions. The eddy current displacement sensor 201 detects different displacements of the elastic support device 100.

[0191] This yields the load-displacement curve of the controllable stiffness elastic support device 100. The slope K of the displacement-load curve represents the static stiffness of the elastic support device 100. The stiffness under a certain working condition is the average of the slopes of the displacement-load curves for each loading or unloading operation, i.e.

[0192]

[0193] In the above formula, K i This represents the slope for each load and unload operation. There are a total of 3 load and unload operations, resulting in 6 sets of slopes from K1 to K6. This represents the sum of K1 to K6, where n = 6, i.e., K i The number of K values ​​represents the static stiffness after taking the average value.

[0194] Figure 11 Another load-displacement curve is shown, in which both the first electromagnetic component 151 and the second electromagnetic component 152 are energized, the moving component 130 is in the first position, and the movable component 140 is in the third position. The horizontal axis shows the displacement of the elastic support device 100, and the vertical axis shows the load of the two weights applied to the rotor shaft 204. The load refers to the total weight of the first weight 202 and the second weight 203. The first weight 202 is loaded multiple times. The second weight 203 is loaded multiple times. It can be understood that the first weight 202 and the second weight 203 are simultaneously subjected to the same weight of load. Figure 11 In the diagram, different colored lines indicate different load conditions. The eddy current displacement sensor 201 detects different displacements of the elastic support device 100.

[0195] This yields the load-displacement curve of the controllable stiffness elastic support device 100. The slope K of the displacement-load curve represents the static stiffness of the elastic support device 100. The stiffness under a certain working condition is the average of the slopes of the displacement-load curves for each loading or unloading operation, i.e.

[0196]

[0197] In the above formula, K i This represents the slope for each load and unload operation. There are a total of 3 load and unload operations, resulting in 6 sets of slopes from K1 to K6. This represents the sum of K1 to K6, where n = 6, i.e., K i The number of K values ​​represents the static stiffness after taking the average value.

[0198] Actual measurements show that the stiffness of the elastic support device when it is not energized is 8.5E6 N / m, and the stiffness of the elastic support device when it is energized is 1.4E7 N / m, with a stiffness adjustment range of 64.71%.

[0199] A speed sensor is installed on the rotor shaft 204 to monitor its rotational speed. When the rotor shaft 204 rotates, the rotor speed detected by the speed sensor is transmitted to an analog-to-digital converter (ADC) via a speed signal, and then transmitted to a computer. When the speed sensor detects that the rotor speed is approaching a critical speed, the computer sends a command to the programmable DC power supply via a power amplifier, and the programmable DC power supply begins to supply DC power to the electromagnet. After the electromagnet is energized, the attraction moving member 130 moves downward along the radial direction D2 of the cage member 110, thereby making close contact with the cage bars 111 and changing the support stiffness. The formula for the stiffness change of the elastic support device 100 is:

[0200]

[0201] In the above formula, n is the number of cage bars 111, E is the Young's modulus of the cage bar 111 material, b is the width of the cage bar 111, h is the height of the cage bar 111, and L is the effective length of the cage bar 111.

[0202] After the electromagnet is energized, the attracting movable component moves along the axial direction of the cage component 110 to compress the metal rubber ring, thereby changing the support stiffness. The formula for the stiffness change of the elastic support device 100 is:

[0203]

[0204] In the above formula, E0 represents the elastic modulus of the metal-rubber ring; P represents the helical coil pitch, which refers to the length of one complete cycle of the periodically repeating helical wire, as the metal-rubber ring is made of helical metal wire; L represents the axial length of the metal-rubber ring; d0 represents the diameter of the metal wire, which refers to the diameter of the helical metal wire itself that makes up the periodically repeating helical wire; d represents the inner diameter of the metal-rubber ring; h represents the radial thickness of the metal-rubber ring; "φ" represents the porosity of the metal-rubber ring, which is defined as the ratio of the total volume occupied by the metal wire in the metal-rubber ring to the total volume of the metal-rubber ring (since the metal wire in the metal-rubber ring is not tightly arranged, and there is air in addition to the metal wire, the porosity is less than 1); d s B1, C1, and D1 represent the diameter of the spiral coil of metal wire in the metal-rubber ring; these are empirical coefficients and need to be specifically corrected by experiments before they can be applied to a metal-rubber ring of a certain size; x represents the radial deformation.

[0205] When the electromagnet is not energized, the metal rubber ring is not compressed, the squirrel cage bars and the wedge block do not contact each other, and the support stiffness is 8.5E6 N / m. When the electromagnet is energized, the metal rubber ring is compressed by 0.6 mm, the wedge block and the squirrel cage bars are in close contact, the length of the squirrel cage bars decreases from 78 mm to 5 mm, and the support stiffness increases to 1.4E7 N / m. Due to the influence of the electromagnet's energization, the stiffness of the variable stiffness combined elastic support device increases, leading to an increase in the critical speed of the rotor shaft, thereby effectively reducing the resonance peak.

[0206] As the rotor shaft speed continues to increase, the speed sensor detects that the rotor speed is approaching the critical speed for high stiffness and transmits the speed signal to the computer via an analog-to-digital converter. The computer sends a command to the DC power supply via a power amplifier, and the DC power supply stops supplying power. The electromagnet loses power and its magnetism disappears. The movable component 140, located in the first position, moves to the second position under the reaction force of the metal rubber ring. The wedge block disengages from the squirrel cage bars, the support stiffness decreases, and the rotor's critical speed decreases accordingly, avoiding the rotor shaft speed at this time, effectively suppressing the peak vibration of the rotor shaft.

[0207] The rotor support stiffness variation range of this application, caused by the extrusion deformation member 180 by the movable member 140, is from 8.5E6 N / m to 1.4E7 N / m, with a stiffness adjustment range of 64.71%, which reduces the peak rotor vibration by more than 50%. This effectively suppresses the peak rotor vibration within the operating speed range of the rotor shaft and improves the rotor dynamic characteristics.

[0208] The rotor shaft rotates at a first speed. When the electromagnet is energized, the moving member 130 moves to a first position along the radial direction D2 of the cage member 110. The moving member 130 in the first position makes close contact with the cage bars 111, causing the movable member 140 to move to a third position along the axial direction D1 of the cage member 110. The movable member 140 in the third position compresses the deforming member 180. The overall structural stiffness of the elastic support device 100 is 1.4 × 10⁻⁶. 7 N / m. In this way, the stiffness of the elastic support device 100 increases, which leads to an increase in the critical speed of the rotor shaft 204, thereby effectively reducing the resonance peak.

[0209] When the rotational speed of rotor shaft 204 continues to rise to the second rotational speed, the speed sensor detects that the rotor speed is approaching the critical speed for high stiffness and transmits the speed signal to the computer via an analog-to-digital converter. The computer sends a command to the DC power supply through a power amplifier, and the DC power supply stops supplying power. The electromagnet is de-energized, its magnetism disappears, and the moving member 130 moves to the second position along the radial direction D2 of the cage member 110 under the force of the elastic member 170. The moving member 130 in the second position is spaced apart from the cage member 110. The movable member 140 moves to the fourth position along the axial direction D1 of the cage member 110 under the force of the deformation member 180. The movable member 140 in the fourth position does not exert any force on the deformation member 180. In this way, the stiffness of the elastic support device 100 decreases, and the critical speed of rotor shaft 204 decreases accordingly, thus avoiding the rotational speed of rotor shaft 204 at this time and effectively suppressing the peak vibration of rotor shaft 204.

[0210] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “part” or “component” appearing herein can refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” appearing herein can refer to one component being directly attached to another component or one component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0211] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A variable stiffness combined elastic support device for an engine rotor shaft (204), characterized in that, The elastic support device includes: A cage member (110) is used to connect the rotor shaft (204) of the engine. The cage member (110) includes a plurality of cage bars (111) which are spaced apart along the circumferential direction of the cage member (110). The first variable stiffness component includes a movable member (130). The second variable stiffness component includes a movable member (140) and a deformable member; An electromagnetic component is provided, which enables the movable member (130) to move relative to the cage member (110) in the radial direction of the cage member, such that the movable member is positioned between adjacent cage bars or spaced apart from the cage member. The electromagnetic assembly can also drive the movable member (140) to move relative to the cage member (110) along the axial direction of the cage member (110), so that the movable member can compress the deformable member or the movable member can exert no force on the deformable member. The electromagnetic assembly includes a first electromagnetic member (151), which corresponds to the movable member (130) along the radial direction. The first electromagnetic member (151) drives the movable member (130) to move relative to the cage member (110) between a first position and a second position. The movable member (130) located at the first position is situated between adjacent cage bars (111), and the movable member (130) located at the first position is in contact with the cage bars (111). The movable member (130) located in the second position is spaced apart from the cage member (110). The cage member (110) further includes a base (113) and an outer edge (114). The base (113) is connected to one end of the cage bar (111) along the axial direction of the cage member (110), and the outer edge (114) is connected to the other end of the cage bar (111) along the axial direction. The movable member (130) located in the first position is in contact with the base (113) and the outer edge (114). The movable member (130) includes a main body (131), which is in contact with the cage bar (111), the base (113), and the outer edge (114). The electromagnetic assembly includes a plurality of first electromagnetic components (151), which are spaced apart along the circumferential direction of the cage component (110). The electromagnetic assembly further includes a second electromagnetic component (152) corresponding to the movable component (140) along the axial direction. The second electromagnetic component (152) drives the movable component (140) to move relative to the cage component (110) between a third position and a fourth position. The movable member (140) located in the third position is capable of compressing the deformable member (180). The movable member (140) located in the fourth position does not exert a force on the deformable member (180).

2. The elastic support device according to claim 1, characterized in that, The movable member (130) also includes a protrusion (132) that protrudes from the end of the main body (131), and the outer edge (114) includes a notch (115) in which the protrusion (132) is located.

3. The elastic support device according to claim 1, characterized in that, The first variable stiffness component further includes a first moving component and a second moving component. The first moving component and the second moving component are located on both sides of the cage component along the radial direction. The same first electromagnetic component can drive both the first moving component and the second moving component to move.

4. The elastic support device according to claim 1, characterized in that, The first electromagnetic component (151) is located inside the cage component (110), and the first electromagnetic component (151) is energized so that the moving component (130) located in the second position moves toward the first electromagnetic component (151) to the first position.

5. The elastic support device according to claim 1, characterized in that, The movable component (140) includes a body portion (141), which is disposed opposite to the second electromagnetic component (152) along the axial direction.

6. The elastic support device according to claim 5, characterized in that, The movable component further includes a pressing part (142), which protrudes from the body part (141) in the axial direction toward the deformable component (180). The second electromagnetic component (152) is energized to attract the body part (141) located in the fourth position to move toward the deformable component (180). The body part (141) located in the third position abuts against the second electromagnetic component (152). The extrusion part (142) located in the third position can extrude the deformable component (180).

7. The elastic support device according to claim 6, characterized in that, The deformable member (180) is capable of elastic deformation along the axial direction. When the second electromagnetic component (152) is de-energized, the deformation component (180) applies an elastic force away from the deformation component (180) to the extrusion part (142) located in the third position. The body part (141) located in the fourth position is spaced apart from the second electromagnetic component (152), and the extrusion part (142) located in the fourth position does not apply a force to the deformation component (180).

8. The elastic support device according to claim 1, characterized in that, The elastic support device further includes a plurality of second electromagnetic components (152), which are spaced apart along the circumferential direction of the cage component (110).

9. The elastic support device according to any one of claims 1-8, characterized in that, The elastic support device further includes a fixing member (160), the fixing member (160) includes a receiving chamber (161) that receives the cage member (110), and the electromagnetic assembly includes a first electromagnetic member and a second electromagnetic member, the first electromagnetic member being located inside the fixing member and the second electromagnetic member being located outside the fixing member.

10. The elastic support device according to claim 9, characterized in that, The fixed member further includes a protruding plate (163), and the elastic support device further includes a deformation member (180). The protruding plate (163) protrudes in the direction of the movable member along the axial direction, and the deformation member (180) is provided between the protruding plate (163) and the cage member (110) along the radial direction of the cage member (110).

11. The elastic support device according to claim 10, characterized in that, The elastic support device includes a plurality of second electromagnetic components (152), and the fixing component further includes a fixing plate (164) connected to the protruding plate (163), and the plurality of second electromagnetic components (152) are all fixed to the fixing plate (164).

12. The elastic support device according to claim 9, characterized in that, The first variable stiffness assembly further includes a first guide member (173) connected to the moving member. The fixed member is provided with a through hole, and the first guide member (173) is inserted into the through hole. The first guide member is movable relative to the through hole in the radial direction to guide the moving member (130) to move in the radial direction.

13. The elastic support device according to claim 12, characterized in that, The first variable stiffness assembly further includes an elastic member (170), one end (171) of the elastic member (170) along the radial direction abuts against the first guide member (173), and the other end (172) of the elastic member (170) along the radial direction abuts against the fixed member (160). The elastic member (170) is capable of elastic deformation along the radial direction so that the moving member (130) located in the first position moves to the second position.

14. The elastic support device according to claim 9, characterized in that, The second variable stiffness assembly further includes a second guide member (174) and a second mating member (144), the second guide member (174) being disposed to the fixed member (160), the second mating member (144) being disposed to the movable member (140), and the second guide member (174) and the second mating member (144) being connected to guide the movable member (140) to move along the axial direction.

15. The elastic support device according to claim 14, characterized in that, One of the second guide member (174) and the second mating member (144) is a hole and the other is a pin, the pin being inserted into the hole.

16. A control method, characterized in that, The control method employs an elastic support device according to any one of claims 1-15, the elastic support device being used for the rotor shaft (204) of the engine, the cage member (110) being connected to the rotor shaft (204), and the control method comprising: When the rotor shaft (204) rotates at a first speed, the electromagnetic component is energized to move the moving member (130) to a first position and the movable member (140) to a third position. The moving member in the first position is located between adjacent cage bars, and the movable member in the third position compresses the deformable member. When the rotor shaft (204) rotates at the second speed, the electromagnetic assembly is de-energized, causing the moving member (130) to move to the second position and the movable member (140) to move to the fourth position. The moving member in the second position is spaced apart from the cage member, and the movable member in the fourth position does not exert any force on the deforming member. The first rotational speed is less than the second rotational speed.

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