CN112943795A

CN112943795A - Novel damping-controllable hybrid bearing, rotating system and control method

Info

Publication number: CN112943795A
Application number: CN202110362708.1A
Authority: CN
Inventors: 李胜波; 宋野; 周长江; 陈照波; 萨维·列奥尼德
Original assignee: Xiamen University of Technology
Current assignee: Xiamen University of Technology
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-06-11

Abstract

A novel damping-controllable hybrid bearing, a rotating system and a control method relate to the field of rotating mechanisms. The novel hybrid bearing comprises a bearing seat, a deep groove ball bearing, a conical bearing, a damping ring, a contact, a driving ring, a piezoelectric driver and a controller; the deep groove ball bearing and the conical bearing are arranged on the bearing seat and are arranged in parallel, and the deep groove ball bearing and the conical bearing are coaxially arranged to form a space for installing the rotating shaft; the damping ring is sleeved on the outer sides of the deep groove ball bearing and the conical bearing, the contacts are arranged on the driving ring and are arranged at intervals along the circumferential direction of the driving ring, the deep groove ball bearing and the conical bearing are arranged coaxially, the contacts are arranged towards the damping ring, and the contacts are abutted against the damping ring; the piezoelectric driver is matched with the driving ring, and the controller is electrically connected with the piezoelectric driver. It can carry a large load and also maintain a high operational stability, especially when approaching and passing through the first order critical speed region.

Description

Novel damping-controllable hybrid bearing, rotating system and control method

Technical Field

The invention relates to the field of rotating mechanisms, in particular to a novel damping-controllable hybrid bearing, a rotating system and a control method.

Background

When a traditional bearing bears a large load, the rotation stability is greatly influenced, and particularly when the first-order critical speed region is approached, the rotation stability and the reliability are greatly interfered.

In view of this, the present application is specifically made.

Disclosure of Invention

A first object of the present invention is to provide a new type of hybrid bearing with controlled damping, which is structurally simple and able to carry large loads while maintaining high operational stability, particularly when approaching and passing through the first-order critical speed range.

A second object of the present invention is to provide a controllably damped rotary system that is capable of carrying large loads while maintaining high operational stability, particularly in approaching and passing first order critical speed regions.

The third purpose of the invention is to provide a control method of a novel hybrid bearing with controllable damping, which has simple operation and brief flow, can conveniently realize the regulation and control of the bearing, and ensures the safety and stability of the bearing operation.

The embodiment of the invention is realized by the following steps:

a novel hybrid bearing with controllable damping, comprising: the device comprises a bearing seat, a deep groove ball bearing, a conical bearing, a damping ring, a contact, a driving ring, a piezoelectric driver and a controller; the deep groove ball bearing and the conical bearing are arranged on the bearing seat and are arranged in parallel, and the deep groove ball bearing and the conical bearing are coaxially arranged to form a space for installing the rotating shaft; the damping ring is sleeved on the outer sides of the deep groove ball bearing and the conical bearing, the contacts are arranged on the driving ring and are arranged at intervals along the circumferential direction of the driving ring, the deep groove ball bearing and the conical bearing are arranged coaxially, the contacts are arranged towards the damping ring, and the contacts are abutted against the damping ring; the piezoelectric driver is matched with the driving ring, and the controller is electrically connected with the piezoelectric driver.

Further, novel hybrid bearing still includes pressure sensor, and pressure sensor inlays and locates inside the damping ring to be used for detecting the pressure of damping ring.

Furthermore, an oil cavity is formed in the inner wall of the conical bearing, the novel hybrid bearing is provided with an oil conveying hole, and the oil conveying hole penetrates through the damping ring and the conical bearing from the outer wall of the bearing seat to the inside.

Furthermore, the oil cavities are multiple and are uniformly arranged at intervals along the circumferential direction of the conical bearing.

Further, the damping ring is a metal rubber elastic damping ring.

Further, novel hybrid bearing still includes the end cover, and the end cover cooperates in the bearing frame, and the through-hole that supplies the pivot to pass through is seted up to the end cover, and the inner ring side of end cover is provided with and is used for with pivot complex O ring.

Furthermore, the end cover is arranged on one side of the deep groove ball bearing, which is far away from the conical bearing, and the driving ring is arranged on one side of the conical bearing, which is far away from the deep groove ball bearing.

A controllably damped rotary system, comprising: a rotating shaft and the novel damping-controllable hybrid bearing; the rotating shaft can be rotatably matched with a conical bearing and a deep groove ball bearing of the novel mixed bearing.

Furthermore, the both ends of pivot all cooperate and have novel hybrid bearing, and the piezoelectric actuator who is located the novel hybrid bearing at both ends all with same controller electric connection.

The control method of the novel controllable damping hybrid bearing comprises the following steps: oil supply; starting the rotating shaft; the rotating shaft is accelerated stably; controlling the piezoelectric driver to operate the driving ring by using the controller so as to press or loosen the damping ring; and allowing the rotating shaft to pass through a first-order critical rotating speed region;

when oil is supplied, if the load is large, oil is supplied to the novel hybrid bearing, the floating of a conical shaft neck of the conical bearing is controlled, and the conical bearing is used for sharing the load; if the load is small, oil is not supplied to the novel hybrid bearing, and the load is borne only by the deep groove ball bearing.

The embodiment of the invention has the beneficial effects that:

the novel damping-controllable hybrid bearing provided by the embodiment of the invention enables the bearing to have the capability of bearing larger radial and axial loads, enlarges the stable threshold speed range of a rotor system, can inhibit the amplitude of oil film oscillation, and simultaneously increases the damping structure of a control system, thereby improving the reliability of the whole rotor system. In the use of novel hybrid bearing, deep groove ball bearing adopts interference fit to fix at cylinder journal part, and conical bearing adopts transition fit to install at conical journal part. The deep groove ball bearing and the conical bearing are arranged in series in the cylindrical part and the conical part of the journal. When in operation, the axial loads experienced will be distributed between the bearings. The structure has the characteristics of accurate positioning of the deep groove ball bearing and capability of bearing large load and impact load of the conical bearing.

In general, the novel damping-controllable hybrid bearing provided by the embodiment of the invention has a simple structure, can bear a large load, and can maintain high operation stability, especially has reliable stability when approaching and passing through a first-order critical speed region. The controllable damping rotating system provided by the embodiment of the invention can bear larger load, and can keep higher running stability, particularly has reliable stability when approaching and passing through a first-order critical rotating speed region. The control method of the novel damping-controllable hybrid bearing provided by the embodiment of the invention is simple to operate, has a simple flow, can conveniently realize the regulation and control of the bearing, and ensures the safety and stability of the bearing operation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a novel hybrid bearing provided by an embodiment of the present invention;

FIG. 2 is a first set of vibration responses of the novel hybrid bearing system at different oil pressures provided by an embodiment of the present invention;

FIG. 3 is a second set of vibrational responses of the system at different oil pressures for the novel hybrid bearing provided by an embodiment of the present invention;

FIG. 4 is a third set of vibration responses of the system at different oil pressures for the novel hybrid bearing provided by the embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a rotor system according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a control method according to an embodiment of the present invention.

Icon: a novel hybrid bearing 100; a bearing housing 110; deep groove ball bearings 120; a conical bearing 130; a damping ring 140; a contact 141; a drive ring 150; a piezoelectric driver 160; a pressure sensor 170; an oil chamber 180; an oil transfer hole 181; an end cap 190; an O-ring 191; a rotation system 200; a rotating shaft 210.

Detailed Description

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "parallel," "perpendicular," and the like do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel relative to "perpendicular," and does not mean that the structures are necessarily perfectly parallel, but may be slightly tilted.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

The terms "substantially", "essentially", and the like are intended to indicate that the relative terms are not required to be absolutely exact, but may have some deviation. For example: "substantially equal" does not mean absolute equality, but it is difficult to achieve absolute equality in actual production and operation, and some deviation generally exists. Thus, in addition to absolute equality, "substantially equal" also includes the above-described case where there is some deviation. In this case, unless otherwise specified, terms such as "substantially", and the like are used in a similar manner to those described above.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1, the present embodiment provides a novel hybrid bearing 100 with controllable damping, where the novel hybrid bearing 100 includes: a bearing seat 110, a deep groove ball bearing 120, a conical bearing 130, a damping ring 140, a contact 141, a drive ring 150, a piezoelectric driver 160, and a controller.

The deep groove ball bearing 120 and the conical bearing 130 are mounted on the bearing seat 110, and are arranged in parallel, and the deep groove ball bearing 120 and the conical bearing 130 are coaxially arranged to form a space for mounting the rotating shaft 210.

The damping ring 140 is sleeved outside the deep groove ball bearing 120 and the conical bearing 130, the contacts 141 are arranged on the driving ring 150 and are arranged at intervals along the circumferential direction of the driving ring 150, the deep groove ball bearing 120 and the conical bearing 130 are coaxially arranged, the contacts 141 are arranged towards the damping ring 140, and the contacts 141 are abutted against the damping ring 140.

The piezoelectric driver 160 is coupled to the driving ring 150, and the controller is electrically connected to the piezoelectric driver 160. The controller controls the piezoelectric driver 160 to enable the driving ring 150 to press or release the damping ring 140 through the contact 141, thereby achieving the purpose of adjusting the damping.

In order to further improve the accuracy of controlling the damping of the damping ring 140, the novel hybrid bearing 100 further includes a pressure sensor 170, and the pressure sensor 170 is embedded inside the damping ring 140 for detecting the pressure of the damping ring 140.

In order to improve the smoothness and the stability of the whole operation process of the bearing, an oil cavity 180 is formed in the inner wall of the conical bearing 130, the novel hybrid bearing 100 is provided with an oil delivery hole 181, and the oil delivery hole 181 penetrates through the damping ring 140 and the conical bearing 130 from the outer wall of the bearing seat 110 to the inside.

In the present embodiment, the oil chamber 180 is plural, and the plural oil chambers 180 are uniformly spaced along the circumferential direction of the conical bearing 130, thereby performing a sufficient lubricating function.

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 employs a metal rubber elastic damping ring 140.

Further, in order to ensure the overall packaging effect of the novel hybrid bearing 100 and the safety during the operation process, the novel hybrid bearing 100 further comprises an end cover 190, the end cover 190 is fitted to the bearing seat 110, the end cover 190 is provided with a through hole for the rotating shaft 210 to pass through, and an O-ring 191 for being fitted with the rotating shaft 210 is arranged on the inner ring side of the end cover 190.

In the embodiment, in order to further improve the stability during the operation and facilitate the adjustment of the damping, the end cap 190 is disposed on the side of the deep groove ball bearing 120 away from the conical bearing 130, and the driving ring 150 is disposed on the side of the conical bearing 130 away from the deep groove ball bearing 120.

In general, the novel hybrid bearing 100 provides the bearing with the capability of bearing larger radial and axial loads, expands the stable threshold speed range of the rotor system, can suppress the amplitude of oil film oscillation, and simultaneously increases the damping structure of the control system, thereby improving the reliability of the whole rotor system.

In the use process of the novel hybrid bearing 100, the deep groove ball bearing 120 is fixed on the cylindrical journal portion in an interference fit mode, and the conical bearing 130 is installed on the conical journal portion in a transition fit mode. The deep groove ball bearing 120 and the conical bearing 130 are arranged in series in the cylindrical and conical portions of the journal. When in operation, the axial loads experienced will be distributed between the bearings. The structure combines the characteristics of accurate positioning of the deep groove ball bearing 120 and large load and impact load bearing of the conical bearing 130.

The controller collects the information of the working condition of the rotor system through the pressure sensor 170, makes a corresponding decision, and continuously sends out an instruction to the piezoelectric driver 160 in combination with the feedback of the contact 141, so that the damping performance of the damping ring 140 is adjusted to a proper state through the action of the driving ring 150. When the normal clearance of the novel controllable damping hybrid bearing 100 is 25 micrometers, the damper rotor system passes through a first-order critical rotating speed at about 3300rpm with the maximum amplitude of 185 micrometers, oil film whirl does not occur in subsequent stable operation, and the damping vibration attenuation effect can be generated on the high-speed rotor system to different degrees in the range of the normal clearance of the conical surface from 25 micrometers to 100 micrometers. Even at the phase gap of 100 mu m, the amplitude of the first-order critical speed can be reduced by about 20.9%, the stable threshold speed interval of the rotor system is expanded by 26.3%, and the amplitude of oil film oscillation is inhibited (from 185 mu m to 55 mu m). Under the condition that the number of the gap and the damping inner and outer ring elements of the damper is proper, the structure is equivalent to that of a rigid support (without the metal rubber elastic damping ring 140), the problem of dynamic instability caused by oil film whirl and oil film oscillation can be solved, the amplitude of the rotor system during critical rotation speed is reduced, and the stable operation of the rotor system to 15000rpm is ensured. The system vibration response at different oil pressures of the rotor system is shown in figures 2, 3 and 4.

Referring to fig. 5, the present embodiment further provides a damping-controllable rotating system 200, where the rotating system 200 includes: a rotating shaft 210 and the novel controllable damping hybrid bearing 100 described above. The shaft 210 is rotatably fitted to the conical bearing 130 and the deep groove ball bearing 120 of the novel hybrid bearing 100.

Specifically, the two ends of the rotating shaft 210 are both matched with the novel hybrid bearings 100, and the piezoelectric drivers 160 of the novel hybrid bearings 100 located at the two ends are both electrically connected with the same controller.

Referring to fig. 6, in order to make the operation effect of the rotating system 200 better, the embodiment further provides a control method, which includes:

the magnitude of the load is firstly distinguished, if the load is large, oil is supplied to the oil cavity 180 of the novel hybrid bearing 100 through the oil transmission hole 181, the floating of the conical journal of the conical bearing 130 is controlled, the conical bearing 130 is used for sharing the load, and the conical bearing 130 and the deep groove ball bearing 120 are used for bearing the load. If the load is small, the oil may not be supplied to the novel hybrid bearing 100, and only the deep groove ball bearing 120 may be used to bear the load.

Subsequently, the rotating shaft 210 is started, the rotating shaft 210 is controlled to smoothly accelerate, when the rotating speed of the rotating shaft 210 is about to reach a first-order critical rotating speed region, the piezoelectric driver 160 is controlled by the controller to operate the driving ring 150, and the damping ring 140 is pressed or released by the contact 141, so that the relative density of the damping ring 140 is changed, and the operation damping and the rigidity are increased or reduced. The real-time pressure condition of the damping ring 140 is detected by the pressure sensor 170, which facilitates accurate control of the damping and stiffness of the damping ring 140 by the controller.

The shaft 210 is then controlled to smoothly pass through the first-order critical speed region.

When the problem of oil film destabilization or the like is dealt with, the control method described above can be used to accomplish the problem.

In summary, the novel hybrid bearing 100 with controllable damping of the novel hybrid bearing 100 with controllable damping has a simple structure, can bear a large load, and can maintain high operation stability, particularly when approaching and passing through a first-order critical speed region, and has reliable stability. The controllably damped rotary system 200 is capable of carrying relatively high loads while maintaining high operational stability, particularly when approaching and passing through a first order critical speed region. The control method of the novel controllable damping hybrid bearing 100 is simple to operate, the flow is brief, the bearing can be conveniently regulated and controlled, and the safety and the stability of the bearing operation are ensured.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel hybrid bearing with controllable damping, comprising: the device comprises a bearing seat, a deep groove ball bearing, a conical bearing, a damping ring, a contact, a driving ring, a piezoelectric driver and a controller;

the deep groove ball bearing and the conical bearing are arranged on the bearing seat and are arranged in parallel, and the deep groove ball bearing and the conical bearing are coaxially arranged to form a space for mounting the rotating shaft; the damping ring is sleeved on the outer sides of the deep groove ball bearing and the conical bearing, the contacts are arranged on the driving ring and are arranged at intervals along the circumferential direction of the driving ring, the deep groove ball bearing and the conical bearing are coaxially arranged, the contacts are arranged towards the damping ring, and the contacts are abutted against the damping ring; the piezoelectric driver is matched with the driving ring, and the controller is electrically connected with the piezoelectric driver.

2. The novel controllably damped hybrid bearing of claim 1, further comprising a pressure sensor embedded within said damping ring for sensing pressure of said damping ring.

3. The novel controllable damping hybrid bearing as claimed in claim 1, wherein the inner wall of the conical bearing is provided with an oil cavity, and the novel hybrid bearing is provided with an oil delivery hole which penetrates through the damping ring and the conical bearing from the outer wall of the bearing seat.

4. The novel controllable damping hybrid bearing according to claim 3, wherein the oil chamber is provided in plurality, and the oil chambers are uniformly spaced along the circumference of the conical bearing.

5. The new controlled damping hybrid bearing of claim 1, wherein said damping ring is a metal rubber elastic damping ring.

6. The novel controllable damping hybrid bearing according to claim 1, further comprising an end cap, wherein the end cap is fitted to the bearing seat, the end cap is provided with a through hole for the rotation shaft to pass through, and an O-ring for fitting with the rotation shaft is disposed on an inner ring side of the end cap.

7. The novel controllable damping hybrid bearing according to claim 6, wherein the end cap is disposed on a side of the deep groove ball bearing away from the conical bearing, and the driving ring is disposed on a side of the conical bearing away from the deep groove ball bearing.

8. A controllably damped rotary system, comprising: a novel hybrid bearing with controllable damping according to any one of claims 1 to 7; the rotating shaft is rotatably matched with the conical bearing and the deep groove ball bearing of the novel mixed bearing.

9. The controllably damped rotary system of claim 8 wherein said new hybrid bearings are fitted to both ends of said shaft and said piezoelectric actuators of said new hybrid bearings at both ends are electrically connected to the same controller.

10. A method for controlling a novel controllable damping hybrid bearing according to any one of claims 1 to 7, comprising:

oil supply;

starting the rotating shaft;

the rotating shaft is accelerated stably;

controlling the piezoelectric driver to operate the driving ring by using the controller so as to press or loosen the damping ring; and

the rotating shaft passes through a first-order critical rotating speed area;

when oil is supplied, if the load is large, oil is supplied to the novel hybrid bearing, the floating of a conical shaft neck of the conical bearing is controlled, and the conical bearing is used for sharing the load; if the load is small, oil is not supplied to the novel hybrid bearing, and the deep groove ball bearing is only utilized to bear the load.