Detachable weight-adjustable rotating equipment bearing damping device

Abstract

The invention relates to the technical field of bearing vibration reduction, in particular to a detachable weight-adjustable rotating equipment bearing vibration reduction device which comprises a rotating assembly, a bearing assembly, a bearing assembly, a bearing assembly, a bearing assembly, a bearing assembly, a bearing assembly, a bearing assembly, a bearing assembly and a bearing assembly, the rotating assembly comprises a steam turbine body and a shaft system arranged at the output end of the steam turbine body, and the shaft system is located in a bearing box; the damping assembly comprises a balance weight part arranged at the top end of the bearing box, the balance weight part is arranged in a square shape and used for controlling vertical vibration force, supporting parts are installed on the two sides of the balance weight part, the bottom ends of the supporting parts are connected with the bearing box, and the balance weight part with the customized size is arranged on an upper end cover of the bearing box. The counterweight piece can be fixed on the bearing box and can be mounted or dismounted under the condition that the bearing box is not dismounted, and the vertical counterweight block is additionally arranged at the top of the upper half part of the bearing box, so that the vibration amplitude of a bearing, particularly vertical shaft vibration and tile vibration, is effectively reduced, the operation stability of a unit can be remarkably improved, and the service life of the unit is prolonged. And the service life of equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of bearing vibration reduction, and in particular to a detachable and weight-adjustable bearing vibration reduction device for rotating equipment. Background Art

[0002] The original model of the No. 1 steam turbine of the power plant was a K-320-23.5 supercritical intermediate reheat three-cylinder two-row condensing steam turbine. In 2008, after the design and flow modification of the unit, the model was changed to N340-23.5 / 540 / 540. After the No. 1 unit was adjusted and repaired and restarted, the vibration of the shaft system deteriorated significantly, especially the horizontal and vertical shaft vibration and bearing vibration of the No. 7 bearing (7 bearing) increased to varying degrees. Although the foot bolts of the No. 7 bearing have been tightened without gaps and the operation adjustment has not shown significant improvement, it is difficult to effectively reduce vibration during the operation of the unit from the perspective of mechanical maintenance under the existing technical means. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the fact that the vertical shaft vibration and bearing vibration mentioned above both increase to varying degrees and it is difficult to effectively perform vibration reduction during the operation of the unit, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a detachable and weight-adjustable vibration reduction device for a rotating equipment bearing.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a detachable and weight-adjustable rotating equipment bearing vibration reduction device, comprising: a rotating assembly, including a steam turbine body, a shaft system arranged at the output end of the steam turbine body, wherein the shaft system is located inside the bearing box; and

[0007] The shock absorbing assembly comprises a counterweight arranged at the top of the bearing box. The counterweight is arranged in a square shape and is used to control the vertical vibration force. Support members are installed on both sides of the counterweight, and the bottom end of the support member is connected to the bearing box.

[0008] As a preferred solution of the detachable and weight-adjustable rotating equipment bearing vibration reduction device described in the present invention, the bearing box upper end cover is provided with a counterweight piece with a customized size, which can be fixed on the bearing box and can be installed or removed without disassembling the bearing box.

[0009] As a preferred solution of the detachable and weight-adjustable rotating equipment bearing vibration reduction device described in the present invention, the counterweight is welded from No. 1 channel steel, the single-side frame is connected by bolts, and the support is divided into a two-side type arrangement according to the side shape of the bearing box, and is supported on the end face and the base of the bearing box in turn.

[0010] As a preferred solution of the detachable and weight-adjustable rotating equipment bearing vibration reduction device described in the present invention, the connection between the counterweight and the bearing box is made of alloy steel full-thread bolts, and nuts are screwed inside and outside to adjust the tightening force.

[0011] As a preferred solution of the detachable and weight-adjustable rotating equipment bearing vibration reduction device of the present invention, holes are drilled on the support member to mount bolts for adjusting the tightening force of the base.

[0012] As a preferred solution of the detachable and weight-adjustable rotating equipment bearing vibration reduction device described in the present invention, the counterweight member includes a frame arranged at the top of the bearing box, a counterweight block is installed inside the frame, and a base plate is installed at the bottom end of the frame.

[0013] As a preferred solution of the detachable and weight-adjustable rotating equipment bearing vibration reduction device of the present invention, the base plate and the positions where the frame contacts the bearing box are equipped with rubber shock-absorbing layers to prevent high-frequency friction from damaging the bearing box.

[0014] As a preferred solution of the detachable and weight-adjustable rotating equipment bearing vibration reduction device described in the present invention, the counterweight also includes a rubber layer arranged inside the frame, and the counterweight block adopts the form of a layer of rubber layer and a layer of counterweight. The rubber layer is also provided inside the frame to prevent resonance collision.

[0015] As a preferred solution of the detachable and adjustable weight rotating equipment bearing vibration reduction device described in the present invention, the counterweight also includes an adjusting nut arranged at the bottom end of the frame, the top end of the adjusting nut passes through the frame to lift the bottom plate, and the adjusting nut can adjust the height of the pressure cover, so that the device is more flexible and can freely adjust the counterweight weight, eccentricity and tightening force of each supporting surface.

[0016] As a preferred solution of the detachable and weight-adjustable rotating equipment bearing vibration reduction device described in the present invention, the support member includes a connecting rod arranged on the side wall of the frame, a base is installed at the bottom end of the connecting rod to connect with the bearing box, and a reinforcing rod is installed on the side wall of the connecting rod, and the reinforcing rod is connected to the bearing box at one end away from the connecting rod.

[0017] Beneficial effects of the present invention: The present invention effectively reduces the vibration amplitude of the bearing, especially the vertical shaft vibration and bearing vibration, by adding a vertical counterweight block to the upper half of the bearing box. Experiments have shown that after loading a 900kg counterweight block on the upper part of the emergency oil tank of the No. 7 bearing, the vertical shaft vibration of the No. 7 bearing dropped by about 30μm, from 190μm to 176μm, and the vibration reduction effect was significant. The device uses a frame welded from No. 12 channel steel and is fixed by M24 and M30 alloy steel full-thread bolts. Nuts are screwed inside and outside to ensure the stability of the counterweight block in a high-frequency vibration environment. In addition, the design of the L-shaped support further enhances the overall stability of the device. The device is designed to be detachable, and the single-side frame is bolted for easy installation and disassembly. The upper part of the frame is provided with a bolt to adjust the gland height, so that the position and tightening force of the counterweight block can be adjusted at any time, and the adjustment can be completed without stopping the machine, which greatly improves the flexibility and convenience of operation. All places in contact with the bearing box are equipped with rubber shock-absorbing pads to effectively prevent high-frequency friction from damaging the bearing box. The upper counterweight block adopts the form of a layer of rubber and a layer of counterweight, and the frame is also equipped with rubber, which further prevents resonance collision and extends the service life of the bearing box. The device has a simple structure and is mainly composed of channel steel, bolts, rubber shock-absorbing pads and counterweight blocks. The required materials and manufacturing costs are low, and it is easy to promote and apply. It can be installed without dismantling the bearing box. The whole can be disassembled into various components, which is very convenient for installation and maintenance, greatly reducing maintenance costs and time. This device can be adjusted according to different vibration problems, covers a wide range, can cope with various types of vibration problems, and is suitable for high-frequency vibration environments such as various large steam turbines. The design of this device is safe and reliable, and it can maintain good stability and safety even in high-frequency vibration environments, and will not have a negative impact on the normal operation of the unit.

[0018] In summary, the present invention provides an efficient, flexible, safe and economical bearing vibration reduction device, which can significantly improve the operating stability of the unit and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without any creative labor.

[0020] Figure 1 The figure is an overall schematic diagram of a detachable and weight-adjustable rotating equipment bearing vibration reduction device.

[0021] Figure 2 The present invention is a schematic diagram of the structure of a counterweight component of a detachable and weight-adjustable rotating equipment bearing vibration reduction device.

[0022] Figure 3 The present invention is a schematic diagram of the frame structure of a detachable and weight-adjustable rotating equipment bearing vibration reduction device.

[0023] Figure 4 This is a schematic diagram of 7-watt horizontal, vertical shaft vibration and bearing vibration after the generator set of a detachable and weight-adjustable rotating equipment bearing vibration reduction device is adjusted.

[0024] Figure 5 The present invention is a schematic diagram of the amplitude of a bearing box of a detachable and weight-adjustable rotating equipment bearing vibration reduction device after a load is added to the upper part.

[0025] Reference numerals:

[0026] 100, rotating assembly; 101, turbine body; 102, shaft system; 103, bearing box;

[0027] 200, shock absorbing assembly; 201, counterweight; 202, supporting member;

[0028] 201a, frame; 201b, counterweight; 201c, bottom plate; 201d, rubber layer; 201e, adjustment nut;

[0029] 202a, connecting rod; 202b, base; 202c, reinforcing rod. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0034] Example 1, reference Figure 1 to Figure 3 , which is the first embodiment of the present invention, provides a detachable and weight-adjustable rotating equipment bearing vibration reduction device, including, the vibration reduction can effectively reduce the vibration generated by the rotating parts without disassembling the bearing box 103, thereby improving the stability and service life of the equipment.

[0035] Specifically, the rotating assembly 100 includes a steam turbine body 101, a shaft system 102 arranged at the output end of the steam turbine body 101, wherein the shaft system 102 is located inside a bearing box 103, and the steam turbine body 101 and the shaft system 102 at the output end thereof, wherein the shaft system 102 is located inside the bearing box 103, are responsible for transmitting rotational power; and

[0036] The shock absorbing assembly 200 includes a counterweight 201 arranged at the top of the bearing box 103. The counterweight 201 is arranged in a square shape and is used to control the vertical vibration force. Support members 202 are installed on both sides of the counterweight 201. The bottom end of the support member 202 is connected to the bearing box 103, and the bottom end of the support member 202 is connected to the bearing box 103 to ensure the stability of the entire shock absorbing assembly 200.

[0037] Furthermore, a weight 201 with a customized size is provided on the upper end cover of the bearing box 103. The weight 201 can be fixed on the bearing box 103 and can be installed or removed without disassembling the bearing box 103. The main function of the weight 201 is to change the natural frequency of the system by increasing the mass of the top of the bearing box 103, thereby reducing the vibration caused by the rotating parts. The design of the weight 201 allows it to be easily installed and removed without disassembling the bearing box 103, thereby improving the convenience of maintenance.

[0038] Furthermore, the counterweight 201 is welded from No. 12 channel steel, and the single-side frame is connected by bolts. The support 202 is divided into two-side L-shaped arrangements according to the side shape of the bearing box 103, and is supported on the end face and the bottom foot of the bearing box 103 in sequence. The support 202 not only plays the role of fixing the counterweight 201, but also supports the end face and the bottom foot of the bearing box 103 through its L-shaped arrangement, thereby enhancing the stability of the entire shock absorbing assembly 200. The bolts on the support 202 can adjust the tightening force of the bottom foot to ensure that the counterweight 201 is firmly fixed on the bearing box 103.

[0039] Furthermore, alloy steel full-thread bolts of M24 and M30 are selected for the connection between the counterweight 201 and the bearing box 103, and nuts are screwed inside and outside for adjusting the tightening force.

[0040] Furthermore, holes are drilled in the support member 202 to receive bolts for adjusting the tightening force of the base.

[0041] Operation process: Prepare materials such as No. 12 channel steel, M24 and M30 alloy steel full-thread bolts, nuts, and rubber shock-absorbing pads. According to the size of the upper end cover of the bearing box 103, use No. 12 channel steel to weld into a square counterweight 201, and install support members 202 on both sides. Arrange the support members 202 in an L-shape on both sides according to the side shape of the bearing box 103, and support them on the end face and base of the bearing box 103 in turn. Use M24 and M30 alloy steel full-thread bolts to fix the counterweight 201 to the bearing box 103, and screw nuts inside and outside to adjust the tightening force. Drill holes on the base support and install bolts to adjust the base tightening force to ensure that the counterweight 201 is firmly installed. Rubber shock-absorbing pads are installed inside all places in contact with the bearing box 103 to prevent high-frequency friction from damaging the bearing box 103.

[0042] Example 2, reference Figure 2-Figure 3 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the counterweight weight, the bias weight and the tightening force of each supporting surface can be adjusted according to actual needs to improve the stability and service life of the equipment.

[0043] Specifically, the counterweight 201 includes a frame 201a disposed at the top of the bearing box 103, a counterweight block 201b is installed inside the frame 201a, and a bottom plate 201c is installed at the bottom end of the frame 201a.

[0044] Furthermore, the positions where the bottom plate 201c and the frame 201a contact the bearing box 103 are equipped with rubber shock-absorbing layers to prevent high-frequency friction from causing damage to the bearing box 103.

[0045] Furthermore, the counterweight 201 also includes a rubber layer 201d arranged inside the frame 201a, and the counterweight block 201b adopts a form of a layer of rubber layer 201d and a layer of counterweight. The frame 201a is also equipped with a rubber layer 201d to prevent resonance collision.

[0046] Furthermore, the counterweight 201 also includes an adjusting nut 201e arranged at the bottom end of the frame 201a. The top end of the adjusting nut 201e passes through the frame 201a to lift the bottom plate 201c. The adjusting nut 201e can adjust the height of the pressure cover, making the device more flexible and able to freely adjust the counterweight weight, bias and tightening force of each supporting surface.

[0047] The rest of the structure is the same as that of Example 1.

[0048] Operation process: In addition to the materials required for Example 1, it is also necessary to prepare a frame 201a, a counterweight 201b, a base plate 201c, a rubber layer 201d and an adjusting nut 201e. According to the size of the upper end cover of the bearing box 103, a square frame 201a is welded using No. 12 channel steel, and a counterweight 201b is installed inside it. The base plate 201c is installed at the bottom end of the frame 201a, and a rubber shock-absorbing layer is provided at the position where the base plate 201c and the frame 201a contact the bearing box 103. The rubber layer 201d is installed inside the frame 201a, and the counterweight 201b adopts the form of a layer of rubber layer 201d and a layer of counterweight. The adjusting nut 201e is installed at the bottom end of the frame 201a, and the top of the adjusting nut 201e passes through the frame 201a to lift the base plate 201c. Use M24 and M30 alloy steel full-thread bolts to fix the counterweight 201 to the bearing box 103, and nuts are screwed inside and outside for adjusting the tightening force. Drill holes on the foot support and install bolts to adjust the foot tightness to ensure that the counterweight 201 is firmly installed.

[0049] Example 3, reference Figure 2 , which is the third embodiment of the present invention. This embodiment is different from the above embodiments in that it ensures that the counterweight 201 can effectively reduce the vibration of the bearing box 103 and improve the operating stability and safety of the unit.

[0050] Specifically, the support member 202 includes a connecting rod 202a arranged on the side wall of the frame 201a, the bottom end of the connecting rod 202a is equipped with a base 202b connected to the bearing box 103, and the side wall of the connecting rod 202a is equipped with a reinforcing rod 202c, and the end of the reinforcing rod 202c away from the connecting rod 202a is connected to the bearing box 103.

[0051] The rest of the structure is the same as that of Example 2.

[0052] Operation process: In addition to the materials required for Examples 1 and 2, it is also necessary to prepare connecting rods 202a, bases 202b and reinforcing rods 202c. Connecting rods 202a are installed on the side walls of the frame 201a, and bases 202b are installed at the bottom end of the connecting rods 202a to connect with the bearing box 103. Reinforcing rods 202c are installed on the side walls of the connecting rods 202a, and the end of the reinforcing rods 202c away from the connecting rods 202a is connected to the bearing box 103 to enhance the stability of the support 202. Use M24 and M30 alloy steel full-thread bolts to fix the counterweight 201 to the bearing box 103, and nuts are screwed inside and outside for adjusting the tightening force. Drill holes on the base support and install bolts to adjust the base tightening force to ensure that the counterweight 201 is firmly installed. Rubber shock-absorbing pads are installed inside all places in contact with the bearing box 103 to prevent high-frequency friction from damaging the bearing box 103. A rubber layer 201d is installed inside the frame 201a, and the counterweight 201b is in the form of a layer of rubber layer 201d and a layer of counterweight. An adjusting nut 201e is installed at the bottom end of the frame 201a, and the top end of the adjusting nut 201e passes through the frame 201a to lift the bottom plate 201c. The adjusting nut 201e can adjust the gland height, making the device more flexible. That is, when the counterweight 201b needs to be installed, the adjusting nut 201e is rotated to lift the bottom plate 201c, so that the bottom plate does not contact the bearing box 103, thereby effectively preventing the vibration generated when the counterweight 201b is installed from affecting the operation of the bearing box 103.

[0053] in Figure 4 After the No. 1 generator set of our factory was adjusted from October 3 to 13, 2022, the horizontal, vertical shaft vibration and bearing vibration of the 7-watt rotor increased to varying degrees. The maximum horizontal shaft vibration of the No. 7 bearing rotor reached 178μm, and the maximum vertical shaft vibration reached 190μm.

[0054] in Figure 5 On November 21, after a load (900kg) was added to the upper part of the emergency oil tank of bearing No. 7, the vertical axial vibration of bearing No. 7 dropped by about 30μm (maximum 176μm), and the vibrations of other axes did not change much. After that, the horizontal and vertical axial vibrations of bearing No. 7 were relatively stable. This shows that the counterweight device has a significant vibration-reducing effect on the equipment vibration.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A detachable and weight-adjustable vibration reduction device for a rotating equipment bearing, characterized in that: include, A rotating assembly (100) comprises a steam turbine body (101), a shaft system (102) arranged at an output end of the steam turbine body (101), wherein the shaft system (102) is located inside a bearing box (103); and The shock absorbing assembly (200) comprises a counterweight (201) arranged at the top of the bearing box (103); the counterweight (201) is arranged in a square shape and is used to control vertical vibration force; support members (202) are installed on both sides of the counterweight (201); and the bottom end of the support member (202) is connected to the bearing box (103).

2. The detachable and weight-adjustable vibration reduction device for rotating equipment bearing according to claim 1, characterized in that: The upper end cover of the bearing box (103) is provided with a counterweight (201) of customized size. The counterweight (201) can be fixed on the bearing box (103) and can be installed or removed without disassembling the bearing box (103).

3. The detachable and weight-adjustable vibration reduction device for rotating equipment bearing according to claim 2, characterized in that: The counterweight (201) is welded from No. 12 channel steel, and the single-side frame is connected by bolts. The support member (202) is divided into two-side L-shaped arrangements according to the side shape of the bearing box (103), and is supported on the end surface and the bottom foot of the bearing box (103) in sequence.

4. The detachable and weight-adjustable vibration reduction device for rotating equipment bearing according to claim 3, characterized in that: The connection between the counterweight (201) and the bearing box (103) is made of alloy steel full-thread bolts of M24 and M30, and nuts are screwed inside and outside for adjusting the tightening force.

5. The detachable and weight-adjustable bearing vibration reduction device for rotating equipment according to claim 4, characterized in that: The support member (202) is provided with holes for mounting bolts thereon, so as to adjust the tightening force of the base.

6. The detachable and weight-adjustable vibration reduction device for rotating equipment bearing according to claim 5, characterized in that: The counterweight (201) comprises a frame (201a) arranged at the top end of the bearing box (103), a counterweight block (201b) is installed inside the frame (201a), and a bottom plate (201c) is installed at the bottom end of the frame (201a).

7. The detachable and weight-adjustable vibration reduction device for rotating equipment bearing according to claim 6, characterized in that: The positions where the bottom plate (201c) and the frame (201a) contact the bearing box (103) are equipped with rubber shock-absorbing layers to prevent high-frequency friction from causing damage to the bearing box (103).

8. The detachable and weight-adjustable vibration reduction device for rotating equipment bearing according to claim 7, characterized in that: The counterweight (201) further comprises a rubber layer (201d) arranged inside the frame (201a); the counterweight block (201b) is in the form of a layer of rubber layer (201d) and a layer of counterweight; the frame (201a) is also provided with the rubber layer (201d) inside to prevent resonance collision and wear.

9. The detachable and weight-adjustable vibration reduction device for rotating equipment bearing according to claim 8, characterized in that: The counterweight (201) further comprises an adjusting nut (201e) arranged at the bottom end of the frame (201a); the top end of the adjusting nut (201e) passes through the frame (201a) to lift up the bottom plate (201c); the adjusting nut (201e) can adjust the height of the gland, making the device more flexible and capable of freely adjusting the counterweight weight, eccentricity and tightening force of each supporting surface.

10. The detachable and weight-adjustable vibration reduction device for rotating equipment bearing according to claim 9, characterized in that: The support member (202) comprises a connecting rod (202a) arranged on the side wall of the frame (201a), a foot (202b) is installed at the bottom end of the connecting rod (202a) to connect with the bearing box (103), and a reinforcing rod (202c) is installed on the side wall of the connecting rod (202a), and one end of the reinforcing rod (202c) away from the connecting rod (202a) is connected to the bearing box (103).

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