A bearing flange vibration isolation device for an in-cabin power module

Abstract

The application discloses a bearing flange vibration isolation device of an in-cabin power module, and belongs to the technical field of metamaterial vibration reduction and noise reduction. The device comprises an inner flange, an outer flange and a vibration isolation body. The vibration isolation body is installed in an installation space formed by the inner flange and the outer flange through an embedded bonding mode. A safety gap is left between the inner flange and the outer flange in the axial and radial directions. The vibration isolation device is rigidly connected with an external power module installation flange and a power cabin shell through the inner flange and the outer flange. The vibration isolation body is limited by the inner flange, the outer flange, the power module installation flange and the power cabin shell. When vibration occurs, the vibration isolation body absorbs vibration energy through its own deformation. When the relative displacement between the inner flange and the outer flange reaches a preset limit, the two are rigidly limited through the vibration isolation body. The application can meet the vibration isolation space requirements of rotary parts. In addition, the vibration isolation device has accurate assembly positioning, good part interchangeability, high safety and adjustable vibration isolation frequency.

Description

Technical Field

[0001] The present invention belongs to the technical field of metamaterial vibration and noise reduction, and specifically relates to a bearing flange vibration isolation device for an in-cabin power module. Background Art

[0002] The power module is the heart of a machine and an indispensable part of the machine. However, the vibration generated by its operation greatly accelerates the failure process of its carrier equipment, and the development of effective vibration isolation devices is urgent. This demand is more obvious in cabin-type machines (such as underwater vehicles, aircraft, and vehicles). This is because cabin-type machines often carry important equipment and living organisms, including humans, and they themselves operate in relatively extreme environments. Such equipment requires a long, stable, and predictable service life. Effective vibration isolation of the cabin power module can not only provide a comfortable environment for passengers, but also greatly improve the safety of equipment use. With the improvement of living standards and the study of vibration failure mechanisms, the research on cabin power module vibration isolation devices has become an increasingly hot topic.

[0003] The in-cabin power module usually contains a rotating shaft and the required rotating connections such as flanges and bearings. Therefore, the inner surface of the power cabin carrying it often adopts a cylindrical and other rotating curved surface design. This design has high space utilization and beautiful appearance, but the curved vibration isolation contact surface and compact vibration isolation space also bring difficulties to its vibration isolation.

[0004] Currently, vibration isolation for shaft-driven power modules in traditional power compartments often uses annular rubber isolators to fill and isolate the power module from the compartment. Practice has shown that selecting the appropriate filler size can effectively reduce vibration transmission, but rubber is prone to aging and has poor impact resistance, increasing maintenance costs and the risk of failure. Furthermore, due to machine usage requirements, power compartments are generally compact, leaving little space for the installation of vibration isolation devices. Traditional vibration isolation methods struggle to achieve the thickness required for ideal vibration isolation, nor can they reserve sufficient axial and radial clearances to ensure safety. Domestic and foreign scholars have also conducted research and development on the arrangement, internal structure, and materials of the filling buffer layer, such as metal rubber isolators and magnesium alloy isolators. These methods have achieved better results than simple rubber ring vibration isolation, but they still cannot break through spatial limitations and achieve better performance. Furthermore, current vibration isolation methods have limitations such as difficult axial positioning, complex manufacturing processes, and unadjustable or narrowly adjustable isolation frequencies. Summary of the Invention

[0005] In view of this, the present invention provides a bearing flange vibration isolation device for the cabin power module, which can meet the vibration isolation space requirements of rotating parts. In addition, the vibration isolation device has accurate assembly positioning, good parts interchangeability, high safety and adjustable vibration isolation frequency, and is usually used in pairs or more.

[0006] A bearing flange vibration isolation device for an in-cabin power module comprises an inner flange, an outer flange and a vibration isolation body; the vibration isolation body is installed in an installation space formed by the inner flange and the outer flange by means of embedded bonding, and the inner flange and the outer flange leave a safety gap in the axial and radial directions after being assembled; the vibration isolation device is rigidly connected to the external power module mounting flange and the power cabin shell through the inner flange and the outer flange thereon, respectively; the vibration isolation body is jointly limited by the inner flange, the outer flange, the power module mounting flange and the power cabin shell; when vibration occurs, the vibration isolation body absorbs vibration energy through its own deformation, and when the relative displacement between the inner flange and the outer flange reaches a preset limit, the two form a rigid limit through the vibration isolation body, and the safety gap can ensure that there is no direct interference between the inner and outer flanges during normal operation of the vibration isolation device or even when rigid limit occurs.

[0007] Furthermore, the inner flange is a circular ring structure, and the inner flange has slots for placing the vibration isolators evenly distributed along the circumference. The slots can limit the radial inward displacement of the vibration isolators and the axial displacement of the flange inward; two grooves and two notches are respectively provided on both sides of the slot near the outer ring and the inner ring, which are used for temporary storage and passage of the vibration isolators after being squeezed and deformed; threaded holes are provided on the circumference of the inner flange for connecting with the power module mounting flange; ear-shaped structures extending radially are evenly distributed on the outer ring of the inner flange. After assembly, the structure forms a gap limit between the inner flange and the outer flange.

[0008] Furthermore, the outer flange is also a circular ring structure, and the outer flange has slots for placing the vibration isolators evenly distributed along the circumference. The slots can limit the radial outward displacement of the vibration isolators and the axial outward displacement of the flange; two grooves and two notches are respectively provided on both sides of the slots near the inner ring and the outer ring, which are used for temporary storage and passage of the vibration isolators after being squeezed and deformed; threaded holes are provided on the circumference of the outer flange for connecting with the power compartment casing.

[0009] Furthermore, the vibration isolator is of an arc-like hollow shape, and the whole is a metamaterial vibration isolation design. The vibration isolator has an arc structure outside the circumference of 180 mm in diameter, and an arc-like structure inside. The arc-like structure is that the side lines of the arc are changed into two straight lines parallel to each other and perpendicular to the chord of the arc; the vibration isolator has three layers of hollow structures distributed on the circumference of different diameters, and all hollow structures are evolved from rectangles.

[0010] Furthermore, in the three-layer hollow structure of the vibration isolator, the structures of the first and third layers are different from the second layer. An isosceles triangle material is removed from the lower side of the first layer's hollow structure, while the same isosceles triangle material is removed from both the upper and lower sides of the second layer's structure. Similarly, the third layer is removed from the upper side.

[0011] Furthermore, the isosceles triangle areas removed from the three-layer hollow structure of the vibration isolator are all the same, and the base of the isosceles triangle is 7.38 mm long and 0.32 mm high.

[0012] Beneficial effects:

[0013] 1. The vibration isolation device of the present invention includes an inner flange, an outer flange and a vibration isolation body. The vibration isolation body is installed in the installation space formed by the inner flange and the outer flange by embedded bonding. The vibration isolation device as a whole is of rotary type and has a compact structure, which can meet the vibration isolation space requirements of rotating parts. After the inner and outer flanges of the vibration isolation device are assembled, a certain safety gap is left between the two in the axial and radial directions. When vibration occurs, when the relative displacement between the inner and outer flanges of the vibration isolation device reaches a certain amount, the inner and outer flanges of the vibration isolation device will form a rigid limit through the vibration isolation body. There is no direct interference between the inner and outer flanges throughout the entire process, so the vibration isolation device as a whole has good safety.

[0014] 2. The vibration isolation device of the present invention has a compact structure. The outer flange and the inner flange are fixed to the cabin shell and the power module mounting flange respectively by screws, and the device is usually installed on the shaft in two or more sets for use, so the device has good positioning performance; the vibration isolation contact surface is arc-shaped, the surface is smooth without sharp points, and the force is evenly distributed, so the device has good force conditions, which improves its stability and durability.

[0015] 3. Ear-shaped structures are evenly distributed on the outer ring of the inner flange of the present invention. After assembly, the ear-shaped structures form a gap limit between the inner and outer flanges, which can avoid large relative displacement between the inner and outer flanges when the vibration isolation device is used, thereby preventing damage to the internal structure or even safety accidents.

[0016] 4. The vibration isolator of this invention utilizes a metamaterial vibration isolation design. Through its materials and structures, it can control classical waves within various media, achieving adjustable isolation frequencies. Compared to traditional vibration isolation, this design not only reduces material requirements but also significantly improves isolation effectiveness, making it both economical and environmentally friendly. Furthermore, the isolator features three layers of hollow structures distributed along the circumference of circles of varying diameters. All hollow structures are derived from rectangular shapes. The internal voids not only improve material utilization and reduce device weight, but also ensure device safety with a large deformation margin.

[0017] 5. The vibration isolation device of the present invention is suitable for the vibration isolation of most shaft-driven power modules in power cabins. It has a simple structure and is easy to reproduce. It can meet the requirements of different cabin sizes by matching flanges of different sizes and vibration isolation bodies, and has a high adaptability to the vibration isolation of cabin power modules.

[0018] 6. The vibration isolation device of the present invention utilizes a flange as its main structure, which features a well-established and mature manufacturing process. The vibration isolation body is easily manufactured, and once the structure is determined, it can be molded and cast. Crucially, the inner and outer flanges of the vibration isolation device have a defined clearance, and the fit between them only needs to meet a certain tolerance range. These conditions facilitate the standardization and serialization of parts and devices, reducing production costs, improving part interchangeability, and facilitating repair and maintenance of the vibration isolation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional structural diagram of a bearing flange vibration isolation device according to an embodiment of the present invention;

[0020] Figure 2 An exploded view of a bearing flange vibration isolation device according to an embodiment of the present invention;

[0021] Figure 3 A front view and a cross-sectional view of a bearing flange vibration isolation device according to an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the inner flange structure of the vibration isolation device in an embodiment of the present invention;

[0023] Figure 5 It is a front view and a cross-sectional view of the internal vibration isolation body of the vibration isolation device in an embodiment of the present invention;

[0024] Figure 6 A three-dimensional structural diagram of the internal vibration isolation body of the vibration isolation device in an embodiment of the present invention;

[0025] Figure 7 Schematic diagram of the outer flange structure of the vibration isolation device in an embodiment of the present invention;

[0026] Figure 8 Schematic diagram of a power cabin equipped with the vibration isolation device of the present invention.

[0027] Among them, 1-power module shaft, 2-bearing, 3-power module mounting flange, 4-inner flange, 41-threaded hole, 42-arc slot, 43-arc baffle, 44-notch, 45-arc groove, 46-ear-shaped structure, 5-vibration isolator, 6-outer flange, 61-threaded hole, 62-arc slot, 63-arc baffle, 64-notch, 65-arc groove, 7-power compartment shell, 8-screw. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0029] Figures 1 to 3 The display shows the cabin power module bearing flange vibration isolation device provided by the embodiment of the present invention. Figure 1 and Figure 3 You can see the overall structure of the plan. Figure 2 The relative position relationship of each part of the vibration isolation device during assembly can be seen. The vibration isolation device has the following characteristics as a whole:

[0030] 1. After the inner flange 4 and the outer flange 6 of the vibration isolation device are assembled, sufficient axial and radial limiting gaps are left between the two, which not only effectively isolate vibration under the action of the vibration isolation body 5, but also ensure safety. The radial gap can be in the range of 0.5-2 mm, and the axial gap can be in the range of 0.5-2 mm. Figure 1 and Figure 3 The axial gap can be observed in the right side view. Figure 3 The axial gap can be observed in the right side view. Due to the existence of the limiting gap, there is no direct contact between the inner flange 4 and the outer flange 6 after the vibration isolation device is assembled. When the inner flange 4 in the vibration isolation device vibrates, the inner flange 4 moves in the reserved gap under the buffering and vibration absorption effect of the vibration isolation body 5, avoiding interference between the inner flange 4 and the outer flange 6, thereby effectively avoiding collision damage and vibration isolation failure of the vibration isolation device. If the vibration of the inner flange 4 causes the deformation of the vibration isolation body to exceed the limit, the inner flange 4 and the outer flange 6 will form a transient rigid connection, which needs to be avoided, so the transient maximum vibration of the power module should be considered when designing the limiting gap.

[0031] 2. As can be seen from Figure 1 and Figure 3 , after the vibration isolation device is assembled, a deformation groove is also reserved for storage after the deformation of the vibration isolation body, thereby improving the vibration isolation performance and safety.

[0032] 3. As can be seen from the exploded view of Figure 2 and the right side view of the assembled section, Figure 3 there is no sufficient freedom between the three components of the vibration isolation device, and the vibration isolation body is bonded to the two flanges. A larger force will cause axial decomposition, so the vibration isolation device cannot be used alone without the cabin body, and must be installed on the power module shaft according to the subsequent assembly method. The vibration isolation device can be used normally. Due to stress and structure considerations, two or more sets of vibration isolation devices are usually used together.

[0033] 4. As can be seen from Figure 8 , the inner flange 4 and the outer flange 6 of the vibration isolation device have threaded holes, which form a rigid connection with the power module mounting flange 3 and the power cabin shell 7 through screws 8, respectively.

[0034] The above is the overall characteristics of the embodiment, and the structure, material and connection method of each part will be introduced in detail below.

[0035] Figure 4The three views from left to right in the figure respectively show the three-dimensional structure diagram, front view and cross-sectional view of the inner flange 4 of the vibration isolation device. The maximum outer diameter of the inner flange of the vibration isolation device is 200mm, the minimum inner diameter is 164mm, and the thickness is 18mm. The whole is made of 6061-T6 alloy material. This alloy material has high strength, good uniformity, and good seismic and impact resistance. Five groups (a total of ten) of threaded holes 41 are provided on a circumference with a diameter of 172mm for threaded connection. Preferably, the angle between the threaded holes in the same group is 30°, and the angle between adjacent threaded holes in different groups is 42°. Five arc-shaped slots 42 are evenly distributed on the outer circumference of the flange for placing the vibration isolation body. Preferably, the inner diameter of the arc is 164mm, the outer diameter is 180mm, and the depth (axial) is 8mm. An arc-shaped baffle 43 is provided on the inner side of the slot to limit the radial displacement of the vibration isolation body 5. Preferably, the arc-shaped baffle 43 is 3 mm thick and a notch 44 with an arc length of 3 mm is reserved on both sides of the baffle to reserve a channel for the deformation of the vibration isolator; arc-shaped grooves 45 are reserved on both sides of the slot near the outer ring so that they can form a chamber with the outer flange 6 after assembly to store the deformed vibration isolator 5. Preferably, the arc radius is 3 mm; 5 ear-shaped structures 46 are evenly distributed on the outer ring of the inner flange 4. After assembly, a gap limit can be formed between the inner flange 4 and the outer flange 6 of the vibration isolation device to avoid large relative displacement between the inner and outer flanges when the vibration isolation device is in use, which may cause damage to the internal structure or even a safety accident. Preferably, the maximum outer diameter of the ear-shaped structure is 200 mm, the minimum diameter is 188 mm, and the thickness is 4 mm.

[0036] Figure 5 The left and right views in the middle respectively show the front view and cross-sectional view of the vibration isolator 5. Figure 6 This is a three-dimensional structural diagram of the vibration isolator. The vibration isolator is an arc-shaped structure with an outer diameter of 210mm, an inner diameter of 170mm, and a thickness of 8mm. The central angle of the arc part is 30°. It is made of polyurethane material (MUC-100), which has the characteristics of low deformation, high stability, long life (under normal working conditions, ≥10 years) and good environmental adaptability. The vibration isolator adopts the design of metamaterial vibration isolation, which has good vibration isolation effect and can achieve vibration isolation of different frequency bands by adjusting its internal structure and materials. The circumference of the vibration isolator is 180mm in diameter (such as Figure 5 The outer part (shown by the dotted line in the left view) is an arc-shaped structure, and the inner part is a quasi-arc-shaped structure. This quasi-arc-shaped structure is evolved from the arc. Specifically, the side lines of the arc are changed into two straight lines that are parallel to each other and perpendicular to the chord of the arc. This structure effectively increases the bonding surface under the vibration isolator. The vibration isolator has three rows of hollow structures distributed on the circumference of different diameters, such as Figure 5As shown in the left view, all hollow structures are evolved from rectangles, and the material of the semicircular area on both sides is removed. Preferably, the rectangle is 7.38mm long and 1.3mm wide, and the diameter of the semicircles on both sides is 1.3mm. It should be noted that the structure of the first and third layers is different from that of the second layer. Figure 5 As shown in the middle view, an isosceles triangle material is removed from the lower side of the first layer of hollow structure, and the same isosceles triangle is removed from the upper and lower sides of the second layer. Similarly, the third layer is removed from the upper side. Preferably, all isosceles triangle areas are the same, with a base length of 7.38 mm and a height of 0.32 mm.

[0037] Figure 7 The three views from left to right in the figure respectively show the three-dimensional structure diagram, front view and cross-sectional view of the outer flange 6. The outer flange 6 has a maximum outer diameter of 214mm, a minimum inner diameter of 192mm and a thickness of 16mm. It is made of 6061-T6 alloy material as a whole. This alloy material has high strength, good uniformity, and good seismic and impact resistance. Five groups (a total of ten) of threaded holes 61 are provided on a circumference with a diameter of 206mm for threaded connection. Preferably, the angle between the threaded holes 61 in the same group is 30°, and the angle between adjacent threaded holes in different groups is 42°. Five arc-shaped slots 62 are evenly distributed on the inner circumference of the flange for placing vibration isolators. Preferably, the inner diameter of the arc is 198mm and the outer diameter is 198mm. The diameter of the vibrating isolator is 214 mm, the depth (axial direction) is 8 mm, and the central angle thereof is 30°; an arc-shaped baffle 63 is provided on each slot to limit the radial displacement of the vibration isolator. Preferably, the baffle is 2 mm thick, and a notch 64 with an arc length of 4 mm is reserved on both sides of the baffle to reserve a channel for deformation of the vibration isolator; arc-shaped grooves 65 are reserved on both sides of the slot near the inner ring so that a chamber can be formed with the inner flange of the vibration isolation device after assembly to store the deformed vibration isolator 5. Preferably, the arc radius is 3 mm; a fillet is provided at the junction of the arc-shaped groove 65 and the inner ring of the outer flange to achieve a smooth transition. Preferably, the fillet radius is 1 mm.

[0038] In addition, an embodiment of the present invention also discloses a power cabin including the bearing flange vibration isolation device. The vibration isolation device connects the power module and the cabin shell, which can effectively isolate the vibration generated by the power module and reduce the vibration of the power cabin body, thereby improving the use environment of the entire cabin body, solving the problem of cabin body vibration durability, and extending its service life.

[0039] For the specific structure of the power compartment, please refer to Figure 8(The power cabin is only used as an installation diagram of the bearing flange vibration isolation device of the embodiment. Other specific structures are erased and will not be described in detail in this manual.) During installation, the power module mounting flange 3 installs the bearing 2 on the power module shaft 1 and the mounting flange itself is fixed to the power module housing by bolts. When the power module is working, the vibration on it is transmitted to the bearing mounting flange 3 through the bearing 2 and the bolts; the bearing mounting flange 3 is connected to the threaded hole 41 on the inner flange 4 of the vibration isolation device by screws 8, and the two form a rigid connection and vibrate together; the power cabin housing 7 is connected to the threaded hole 61 on the outer flange 6 by screws 8, and the two form a rigid connection and vibrate together; the vibration isolation body 5 is connected to the inner flange 4 of the vibration isolation device and the outer flange 6 of the vibration isolation device by embedded bonding. The inner and outer flanges of the vibration isolation device, the power module mounting flange, and the cabin housing simultaneously limit the vibration isolation body. At this point, the vibration isolation device is installed in the power cabin.

[0040] The principle of vibration isolation of the device is:

[0041] Because the vibration isolation device's inner flange 4 and the power module mounting flange 3 are rigidly connected via screws 8, they move in unison and form a single component. The power module mounting flange 3 is connected to the power module housing and its rotating shaft. When the power module is operating, vibrations are transmitted to the vibration isolation device's inner flange 4. At the moment before the inner flange 4 vibrates, the vibration isolator is in an initial non-deformed state; further, at the moment the vibration arrives, the spatial position of the inner flange of the vibration isolation device changes, but since there is no direct connection between the inner and outer flanges, the outer flange 6 remains stable, the inner flange 4 squeezes the vibration isolation body 5 and causes it to undergo elastic deformation. At this time, a large amount of vibration energy is released, and most of the vibration is blocked by the vibration isolation body 5; further, the deformation continues, and the vibration isolation body with a larger deformation amount will be pressed into the preset deformation groove of the vibration isolation device, effectively ensuring the stability of the outer flange 6; further, the limit gap reserved between the inner and outer flanges provides a large margin for the deformation of the vibration isolation body 5 and the vibration of the inner flange 4, effectively ensuring the safety of the device; further, a small amount of unisolated vibration frequencies and some vibration amplitudes that are too large to cause the vibration isolation body 5 to be compressed to the limit are eventually transmitted to the outer flange 6 fixed to the power compartment shell 7, eventually forming vibration and noise, but the vibration and noise at this time are greatly weakened compared with those generated by the power module, achieving the expected vibration isolation effect.

[0042] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bearing flange vibration isolation device for an in-cabin power module, characterized in that: It comprises an inner flange, an outer flange and a vibration isolator; the vibration isolator is installed in the installation space formed by the inner flange and the outer flange by means of embedded bonding, and a safety gap is left in the axial and radial directions after the inner flange and the outer flange are assembled, and the vibration isolation device is rigidly connected to the external power module mounting flange and the power compartment shell through the inner flange and the outer flange respectively, and the vibration isolator is jointly limited by the inner flange, the outer flange, the power module mounting flange and the power compartment shell; when vibration occurs, the vibration isolator absorbs vibration energy through its own deformation, and when the relative displacement between the inner flange and the outer flange reaches a preset limit, the two form a rigid limit through the vibration isolator, and the safety gap can ensure that there is no direct interference between the inner and outer flanges when rigid limit occurs; The inner flange is a circular ring structure, and slots for placing vibration isolators are evenly distributed along the circumference of the inner flange. The slots can limit the radial inward displacement of the vibration isolator and the axial displacement of the flange inward; two arc-shaped grooves and two notches are respectively provided on both sides of the slot near the outer ring and the inner ring, which are used for temporary storage and passage of the vibration isolator after being squeezed and deformed; threaded holes are provided on the circumference of the inner flange for connecting with the power module mounting flange; ear-shaped structures extending radially are evenly distributed on the outer ring of the inner flange. After assembly, the structure forms a gap limit between the inner flange and the outer flange.

2. The bearing flange vibration isolation device of the cabin power module according to claim 1, characterized in that: The outer flange is also a circular ring structure, and there are slots for placing the vibration isolators evenly distributed along the circumference of the outer flange. The slots can limit the radial outward displacement of the vibration isolators and the axial outward displacement of the flange; two arc-shaped grooves and two notches are respectively provided on both sides of the slots near the inner ring and the outer ring for temporary storage and passage of the vibration isolators after being squeezed and deformed; threaded holes are provided on the circumference of the outer flange for connecting with the power compartment casing.

3. The bearing flange vibration isolation device of the cabin power module according to claim 2, characterized in that: The vibration isolator is of an arc-shaped hollow shape and is designed as a metamaterial vibration isolation body. The outer side of the 180mm diameter circle of the vibration isolator is an arc-shaped structure, and the inner side is an arc-shaped structure. The arc-shaped structure is a straight line with two sides of the arc parallel to each other and perpendicular to the chord of the arc. The vibration isolator has three layers of hollow structures distributed on the circumference of different diameters, and all hollow structures are evolved from rectangles.

4. The bearing flange vibration isolation device of the cabin power module according to claim 3, characterized in that: In the three-layer hollow structure of the vibration isolator, the hollow structures of the first and third layers are different from those of the second layer. An isosceles triangle material is removed from the lower side of the first layer's hollow structure, while the same isosceles triangle material is removed from both the upper and lower sides of the second layer's hollow structure. Similarly, the third layer is removed from the upper side.

5. The bearing flange vibration isolation device of the cabin power module according to claim 3 or 4, characterized in that: The isosceles triangle areas removed from the three-layer hollow structure of the vibration isolator are all the same.

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