A hybrid bearing with controllable damping, a rotation system and a control method

Abstract

A hybrid bearing with controllable damping, a rotation system and a control method, which relate to the field of rotation mechanisms. The hybrid bearing comprises a bearing seat, a deep groove ball bearing, a tapered bearing, a damping ring, a contact, a driving ring, a piezoelectric driver and a controller; the deep groove ball bearing and the tapered bearing are both mounted on the bearing seat, and the two are arranged in parallel, and the deep groove ball bearing and the tapered bearing are arranged coaxially to form a space for installing a rotating shaft; the damping ring is sleeved on the outer sides of the deep groove ball bearing and the tapered bearing, the contact is arranged on the driving ring and arranged at intervals along the circumference of the driving ring, the driving ring, the deep groove ball bearing and the tapered bearing are arranged coaxially, the contact is arranged toward the damping ring, and the contact abuts against the damping ring; the piezoelectric driver cooperates with the driving ring, and the controller is electrically connected to the piezoelectric driver. It can carry a large load and maintain a high operating stability, especially when approaching and passing the first-order critical speed zone, it has reliable stability.

Description

Technical Field

[0001] The present invention relates to the field of rotating mechanisms, and in particular to a hybrid bearing with controllable damping, a rotating system and a control method. Background Art

[0002] When traditional bearings are subjected to heavy loads, their rotational stability will be greatly affected, especially when approaching the first-order critical speed zone, the rotational stability and reliability will be greatly disturbed.

[0003] In view of this, this application is hereby filed. Summary of the invention

[0004] The first object of the present invention is to provide a hybrid bearing with controllable damping, which has a simple structure and can bear a large load while maintaining high operating stability, especially when approaching and passing through the first-order critical speed zone, and has reliable stability.

[0005] The second object of the present invention is to provide a rotation system with controllable damping, which can bear a large load while maintaining high operating stability, especially having reliable stability when approaching and passing through the first-order critical speed region.

[0006] The third purpose of the present invention is to provide a control method for a hybrid bearing with controllable damping, which is simple to operate and has a simple process, and can easily realize the regulation of the bearing to ensure the safety and stability of the bearing operation.

[0007] The embodiment of the present invention is achieved as follows:

[0008] A hybrid bearing with controllable damping, comprising: a bearing seat, a deep groove ball bearing, a tapered bearing, a damping ring, a contact, a drive ring, a piezoelectric driver and a controller; the deep groove ball bearing and the tapered bearing are both installed on the bearing seat and are arranged in parallel, and the deep groove ball bearing and the tapered bearing are arranged coaxially to form a space for installing a rotating shaft; the damping ring is sleeved on the outside of the deep groove ball bearing and the tapered bearing, the contact is arranged on the drive ring and is arranged at intervals along the circumference of the drive ring, the drive ring, the deep groove ball bearing and the tapered bearing are arranged coaxially, the contact is arranged toward the damping ring, and the contact abuts against the damping ring; the piezoelectric driver cooperates with the drive ring, and the controller is electrically connected to the piezoelectric driver.

[0009] Furthermore, the hybrid bearing also includes a pressure sensor, which is embedded in the damping ring to detect the pressure of the damping ring.

[0010] Furthermore, an oil cavity is formed on the inner wall of the tapered bearing, and an oil delivery hole is provided on the hybrid bearing. The oil delivery hole runs through the damping ring and the tapered bearing from the outer wall of the bearing seat inward.

[0011] Furthermore, there are multiple oil chambers, and the multiple oil chambers are evenly spaced along the circumference of the tapered bearing.

[0012] Furthermore, the damping ring is a metal rubber elastic damping ring.

[0013] Furthermore, the hybrid bearing also includes an end cover, which is matched with the bearing seat. The end cover is provided with a through hole for the shaft to pass through, and an O-ring for matching with the shaft is arranged on the inner ring side of the end cover.

[0014] Furthermore, the end cover is arranged on a side of the deep groove ball bearing away from the tapered bearing, and the drive ring is arranged on a side of the tapered bearing away from the deep groove ball bearing.

[0015] A controllable damping rotation system comprises: a rotating shaft and the above-mentioned controllable damping hybrid bearing; the rotating shaft is rotatably matched with a tapered bearing and a deep groove ball bearing of the hybrid bearing.

[0016] Furthermore, hybrid bearings are provided at both ends of the rotating shaft, and the piezoelectric drivers of the hybrid bearings at both ends are electrically connected to the same controller.

[0017] A control method for the above-mentioned hybrid bearing with controllable damping, comprising: supplying oil; starting the rotating shaft; accelerating the rotating shaft steadily; using a controller to control the piezoelectric driver to operate the driving ring to tighten or loosen the damping ring; and passing the rotating shaft through the first-order critical speed region;

[0018] Among them, when supplying oil, if it is a large load, oil is supplied to the hybrid bearing to control the floating of the tapered journal of the tapered bearing, and the tapered bearing is used to share the load; if it is a small load, oil is not supplied to the hybrid bearing, and only the deep groove ball bearing is used to bear the load.

[0019] The beneficial effects of the embodiments of the present invention are:

[0020] The hybrid bearing with controllable damping provided in the embodiment of the present invention enables the bearing to withstand greater radial and axial loads, expands the range of the stable threshold speed of the rotor system, can suppress the amplitude of the oil film oscillation, and at the same time increases the structure of the control system damping, thereby improving the reliability of the entire rotor system. During the use of the hybrid bearing, the deep groove ball bearing is fixed to the cylindrical shaft neck part with an interference fit, and the tapered bearing is installed on the tapered shaft neck part with a transition fit. The deep groove ball bearing and the tapered bearing are arranged in series on the cylindrical part and the tapered part of the shaft neck. When in operation, the axial load received will be distributed between the bearings. This structure combines the characteristics of the accurate positioning of the deep groove ball bearing and the ability of the tapered bearing to withstand large loads and impact loads.

[0021] In general, the hybrid bearing with controllable damping provided in the embodiment of the present invention has a simple structure, can bear a large load, and can also maintain a high operating stability, especially when approaching and passing through the first-order critical speed zone, it has reliable stability. The rotation system with controllable damping provided in the embodiment of the present invention can bear a large load, and can also maintain a high operating stability, especially when approaching and passing through the first-order critical speed zone, it has reliable stability. The control method of the hybrid bearing with controllable damping provided in the embodiment of the present invention is simple to operate and has a simple process, and can easily realize the regulation of the bearing to ensure the safety and stability of the bearing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a hybrid bearing provided by an embodiment of the present invention;

[0024] Figure 2 A first group of vibration responses of a hybrid bearing system under different oil pressures provided by an embodiment of the present invention;

[0025] Figure 3 A second group of vibration responses of the hybrid bearing system under different oil pressures provided by an embodiment of the present invention;

[0026] Figure 4 A third group of vibration responses of the hybrid bearing system under different oil pressures provided by an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the structure of a rotor system provided in an embodiment of the present invention;

[0028] Figure 6 A schematic flow chart of a control method provided by an embodiment of the present invention.

[0029] Icons: hybrid bearing 100; bearing seat 110; deep groove ball bearing 120; tapered bearing 130; damping ring 140; contact 141; drive ring 150; piezoelectric driver 160; pressure sensor 170; oil chamber 180; oil delivery hole 181; end cover 190; O-ring 191; rotation system 200; rotating shaft 210. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0035] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] The terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute accuracy, but can have certain deviations. For example, "roughly equal to" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal to" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example

[0039] Please refer to Figure 1 The present embodiment provides a hybrid bearing 100 with controllable damping. The hybrid bearing 100 includes: a bearing seat 110, a deep groove ball bearing 120, a tapered bearing 130, a damping ring 140, a contact 141, a drive ring 150, a piezoelectric driver 160 and a controller.

[0040] The deep groove ball bearing 120 and the tapered bearing 130 are both installed on the bearing seat 110 , and the two are arranged side by side. The deep groove ball bearing 120 and the tapered bearing 130 are arranged coaxially to form a space for installing the rotating shaft 210 .

[0041] The damping ring 140 is sleeved on the outer sides of the deep groove ball bearing 120 and the tapered bearing 130. The contacts 141 are arranged on the driving ring 150 and are arranged at intervals along the circumference of the driving ring 150. The driving ring 150, the deep groove ball bearing 120 and the tapered bearing 130 are arranged coaxially. The contacts 141 are arranged toward the damping ring 140 and abut against the damping ring 140.

[0042] The piezoelectric driver 160 cooperates with the driving ring 150, and the controller is electrically connected to the piezoelectric driver 160. By controlling the piezoelectric driver 160 with the controller, the driving ring 150 can squeeze or release the damping ring 140 through the contact 141, thereby achieving the purpose of adjusting the damping.

[0043] In order to further improve the control accuracy of the damping of the damping ring 140 , the hybrid bearing 100 further includes a pressure sensor 170 . The pressure sensor 170 is embedded in the damping ring 140 to detect the pressure of the damping ring 140 .

[0044] In order to improve the smoothness and stability of the overall operation of the bearing, an oil chamber 180 is opened on the inner wall of the tapered bearing 130, and the hybrid bearing 100 is provided with an oil delivery hole 181, which runs from the outer wall of the bearing seat 110 inwardly through the damping ring 140 and the tapered bearing 130.

[0045] In this embodiment, there are a plurality of oil chambers 180 , and the plurality of oil chambers 180 are evenly spaced along the circumference of the tapered bearing 130 , thereby achieving sufficient lubrication.

[0046] In order to ensure the structural strength and durability of the damping ring 140 and to provide the damping ring 140 with a sufficiently large damping adjustment range, the damping ring 140 is a metal rubber elastic damping ring 140 .

[0047] Furthermore, in order to ensure the overall packaging effect of the hybrid bearing 100 and the safety during operation, the hybrid bearing 100 also includes an end cover 190, which is matched with the bearing seat 110. The end cover 190 is provided with a through hole for the rotating shaft 210 to pass through, and the inner ring side of the end cover 190 is provided with an O-ring 191 for matching with the rotating shaft 210.

[0048] In this embodiment, in order to further improve the stability during operation and facilitate the regulation of damping, the end cover 190 is arranged on the side of the deep groove ball bearing 120 away from the tapered bearing 130, and the drive ring 150 is arranged on the side of the tapered bearing 130 away from the deep groove ball bearing 120.

[0049] In general, the hybrid bearing 100 enables the bearing to withstand greater radial and axial loads, expands the range of the stable threshold speed of the rotor system, can suppress the amplitude of the oil film oscillation, and at the same time increases the damping structure of the control system, thereby improving the reliability of the entire rotor system.

[0050] During the use of the hybrid bearing 100, the deep groove ball bearing 120 is fixed to the cylindrical journal part by interference fit, and the tapered bearing 130 is installed to the tapered journal part by transition fit. The deep groove ball bearing 120 and the tapered bearing 130 are arranged in series on the cylindrical part and the tapered part of the journal. When in operation, the axial load received will be distributed between the bearings. This structure has the characteristics of accurate positioning of the deep groove ball bearing 120 and the ability of the tapered bearing 130 to withstand large loads and impact loads.

[0051] The controller collects information about the working condition of the rotor system through the pressure sensor 170, makes corresponding decisions, and continuously issues instructions to the piezoelectric driver 160 in combination with the feedback of the contact 141, and adjusts the damping performance of the damping ring 140 to a suitable state through the action of the drive ring 150. When the normal clearance of the hybrid bearing 100 with controllable damping is 25μm, the damper rotor system passes the first-order critical speed at about 3300rpm with a maximum amplitude of 185μm, and the subsequent operation is stable without oil film vortex. Within the range of the normal clearance of the conical surface of 25μm to 100μm, the high-speed rotor system can be damped and reduced to varying degrees. Even when the normal clearance is 100μm, the amplitude at the first-order critical speed can still be reduced by about 20.9%, and the range of the stable threshold speed of the rotor system is expanded by 26.3%, and the amplitude of the oil film oscillation is suppressed (from 185μm to 55μm). When the gap and the number of damper inner and outer ring elements are appropriate, the structure is equivalent to a rigid support (without the metal rubber elastic damping ring 140), which can solve the dynamic instability problem caused by oil film vortex and oil film oscillation, reduce the amplitude of the rotor system at the critical speed, and ensure the rotor system to run smoothly to 15000rpm. The vibration response of the rotor system under different oil pressures is as follows Figure 2 , 3 and 4.

[0052] Please combine Figure 5 This embodiment further provides a controllable damping rotation system 200, which includes a rotation shaft 210 and the above-mentioned controllable damping hybrid bearing 100. The rotation shaft 210 is rotatably matched with the tapered bearing 130 and the deep groove ball bearing 120 of the hybrid bearing 100.

[0053] Specifically, both ends of the rotating shaft 210 are equipped with hybrid bearings 100 , and the piezoelectric drivers 160 of the hybrid bearings 100 located at both ends are electrically connected to the same controller.

[0054] Please combine Figure 6 In order to make the operation effect of the rotation system 200 better, this embodiment also provides a control method, which includes:

[0055] First, the load size is distinguished. If the load is large, oil is supplied to the oil chamber 180 of the hybrid bearing 100 through the oil delivery hole 181 to control the tapered journal of the tapered bearing 130 to float, and the tapered bearing 130 is used to share the load, that is, the tapered bearing 130 and the deep groove ball bearing 120 are used to bear the load. If the load is small, oil may not be supplied to the hybrid bearing 100, and only the deep groove ball bearing 120 is used to bear the load.

[0056] Then, the rotating shaft 210 is started and controlled to accelerate smoothly. When the rotating speed of the rotating shaft 210 is about to reach the first-order critical speed zone, the controller controls the piezoelectric driver 160 to operate the driving ring 150, and the contact 141 is used to squeeze or release the damping ring 140, thereby changing the relative density of the damping ring 140, increasing or decreasing the running damping and stiffness. The pressure sensor 170 is used to detect the real-time pressure of the damping ring 140, so as to facilitate the use of the controller to accurately control the damping and stiffness of the damping ring 140.

[0057] Next, the rotating shaft 210 can be controlled to smoothly pass through the first-order critical speed region.

[0058] It should be noted that the above-mentioned control method can also be used to deal with problems such as oil film instability.

[0059] In summary, the hybrid bearing 100 with controllable damping has a simple structure, can bear a large load, and can also maintain a high operating stability, especially when approaching and passing through the first-order critical speed zone, it has reliable stability. The rotation system 200 with controllable damping can bear a large load, and can also maintain a high operating stability, especially when approaching and passing through the first-order critical speed zone, it has reliable stability. The control method of the hybrid bearing 100 with controllable damping is simple to operate, the process is simple, and it can easily realize the regulation of the bearing to ensure the safety and stability of the bearing operation.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hybrid bearing with controllable damping, characterized in that: include: Bearing seats, deep groove ball bearings, tapered bearings, damping rings, contacts, drive rings, piezoelectric actuators and controllers; The deep groove ball bearing and the tapered bearing are both installed on the bearing seat, and the two are arranged in parallel. The deep groove ball bearing and the tapered bearing are arranged coaxially to form a space for installing the rotating shaft; the damping ring is sleeved on the outside of the deep groove ball bearing and the tapered bearing, the contact is arranged on the driving ring and arranged at intervals along the circumference of the driving ring, the driving ring, the deep groove ball bearing and the tapered bearing are arranged coaxially, the contact is arranged toward the damping ring, and the contact abuts against the damping ring; the piezoelectric driver cooperates with the driving ring, and the controller is electrically connected to the piezoelectric driver; an oil cavity is opened on the inner wall of the tapered bearing, and the hybrid bearing is provided with an oil delivery hole, and the oil delivery hole passes through the damping ring and the tapered bearing from the outer wall of the bearing seat inward.

2. The controllable damping hybrid bearing according to claim 1, characterized in that: The hybrid bearing further comprises a pressure sensor, which is embedded in the damping ring to detect the pressure of the damping ring.

3. The controllable damping hybrid bearing according to claim 1, characterized in that: There are multiple oil chambers, and the multiple oil chambers are evenly spaced along the circumference of the tapered bearing.

4. The controllable damping hybrid bearing according to claim 1, characterized in that: The damping ring is a metal rubber elastic damping ring.

5. The controllable damping hybrid bearing according to claim 1, characterized in that: The hybrid bearing further comprises an end cover, which is matched with the bearing seat, and is provided with a through hole for the shaft to pass through, and an O-ring for matching with the shaft is arranged on the inner ring side of the end cover.

6. The controllable damping hybrid bearing according to claim 5, characterized in that: The end cover is arranged on a side of the deep groove ball bearing away from the tapered bearing, and the drive ring is arranged on a side of the tapered bearing away from the deep groove ball bearing.

7. A rotation system with controllable damping, characterized in that: include: A rotating shaft and a hybrid bearing with controllable damping as claimed in any one of claims 1 to 6; the rotating shaft is rotatably matched with the tapered bearing and the deep groove ball bearing of the hybrid bearing.

8. The controllable damping rotation system according to claim 7, characterized in that: Both ends of the rotating shaft are matched with the hybrid bearings, and the piezoelectric drivers of the hybrid bearings located at both ends are electrically connected to the same controller.

9. A control method for a hybrid bearing with controllable damping according to any one of claims 1 to 6, characterized in that: include: Oil supply; Start the reel; The shaft accelerates smoothly; Using the controller to control the piezoelectric driver to operate the driving ring to tighten or loosen the damping ring; and Make the shaft pass through the first critical speed region; When supplying oil, if the load is large, oil is supplied to the hybrid bearing to control the tapered journal of the tapered bearing to float, and the tapered bearing is used to share the load; if the load is small, oil is not supplied to the hybrid bearing, and only the deep groove ball bearing is used to bear the load.

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