A bearing shell gap adjusting structure

Abstract

The utility model relates to the field of mechanical transmission, especially a bearing bush gap adjusting structure, including first drive motor, first drive motor control nut does horizontal movement on the screw rod, and the nut is connected with the bearing bush outer surface to make first drive motor control bearing bush displacement relative to the main shaft, second drive motor, second drive motor control rack translation, and the rack drives support to move, and the support is provided with the probe close to the bearing bush outer surface. After adopting above -mentioned scheme, bearing bush can be adjusted without disassembling structure.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission, and specifically to a bearing clearance adjustment structure. Background Technology

[0002] Sliding bearings offer advantages such as high speed, low frictional resistance, and high load-bearing capacity, and are commonly used in hydraulic and hydropower projects or other large rotating devices. These large devices often employ multi-piece sliding bearing structures. Adjusting the clearance of segmented sliding bearings frequently requires manual adjustment of the clearance between the bearing shell and the main shaft, with the clearance size depending on the operator's feel. Significant inconsistencies in clearance often lead to excessively high temperatures in some bearing shells, resulting in premature wear or failure. Furthermore, to ensure safe operation, regular inspection of the bearing shell surface wear is necessary. However, since the bearing shells are located inside the structure, disassembly of structural components is required, which is labor-intensive, time-consuming, and requires removing the bearing shells for inspection and then reassembling them, potentially causing additional problems. Simultaneously, the lack of automation in bearing shell clearance adjustment and rotational status inspection results in significant waste of manpower and resources, and operation in confined spaces presents numerous inconveniences and potential safety hazards.

[0003] For example, CN220912200U discloses a special tool for adjusting the gap of water guide bearings in power plants. A feeler gauge is stably installed on the water guide bearing via a support frame to solve the problem of unstable gap measurement between the anti-weight bolt and the water guide bearing by manually holding a feeler gauge. However, the above-mentioned technical means still belong to manual adjustment.

[0004] Therefore, the inventors conducted further research and developed a bearing clearance adjustment structure, which led to this invention. Utility Model Content

[0005] The purpose of this invention is to provide a bearing clearance adjustment structure that allows for bearing adjustment without disassembling the structure.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A bearing clearance adjustment structure, comprising

[0008] The first drive motor controls the nut to move horizontally on the lead screw. The nut is connected to the outer surface of the bearing bush, thereby allowing the first drive motor to control the displacement of the bearing bush relative to the main shaft.

[0009] The second drive motor controls the rack to translate, and the rack drives the bracket to move. The bracket is equipped with a probe close to the outer surface of the bearing.

[0010] When the bearing needs to be inspected, the first drive motor first moves the bearing away from the main shaft under the drive of the nut, increasing the gap between the bearing and the main shaft. Then, the second drive motor drives the rack and the bracket fixed on the rack to move closer to the bearing until the bearing is in position. The condition of the bearing surface can be remotely detected by the probe, without the need for disassembly of the structure as in traditional manual inspection.

[0011] Furthermore, the first drive motor and the second drive motor are both mounted on the same motor mount, with the probe positioned above the motor mount and the nut positioned below the motor mount.

[0012] Furthermore, the first drive motor is linked to the lead screw via a pair of bevel gears.

[0013] The transmission ratio of the motor output can be changed by altering the size ratio between the two bevel gears.

[0014] Furthermore, the second drive motor first links with the gear, and the gear then drives the rack to translate, with the rack moving along a horizontally set guide rail.

[0015] Furthermore, the bearing bush is positioned between the main shaft and the bearing housing, and the nut passes through the bearing housing.

[0016] Furthermore, the first drive motor is vertically positioned relative to the motor base. The first drive motor is first linked with the horizontally positioned first bevel gear, and the first bevel gear is linked with the vertically positioned second bevel gear.

[0017] By adopting the above solution, this utility model has the following advantages compared with the prior art:

[0018] 1. The motor control method is used to accurately control the gap between the bearing bush and the main shaft. The bearing bush support structure moves linearly during the bearing bush adjustment process, which avoids the wear between the back of the bearing bush and the support structure in the conventional stud support structure. In addition, this remote control motor adjustment method can adjust the bearing bush without disassembling the structure, which has high efficiency and simplicity.

[0019] 2. It can perform regular inspections of bearing bushes online, and has the advantages of simple structure and easy operation, which reduces the workload of maintenance. After maintenance, it can achieve high-precision restoration of bearing bush clearance, avoiding safety hazards to subsequent operation caused by improper maintenance and adjustment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the bearing bush of this utility model approaching the main shaft;

[0021] Figure 2 yes Figure 1 A diagram from another angle;

[0022] Figure 3 This is a schematic diagram of the bearing bush of this utility model when it is far away from the main shaft;

[0023] Label Explanation

[0024] 1-First drive motor; 2-First bevel gear; 3-Second bevel gear; 4-Lead screw;

[0025] 5-Nut; 6-Bearing shell; 7-Second drive motor; 8-Gear; 9-Rack; 10-Guide rail;

[0026] 11-Bracket; 12-Probe; 13-Spindle; 14-Bearing seat. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] A bearing clearance adjustment structure includes a clearance adjustment module and an online detection module; wherein the clearance adjustment module uses a first drive motor 1 as a power source, such as... Figure 1-3 As shown, the first drive motor 1 is vertically mounted on the motor base, and its motor shaft is linked with the horizontally mounted first bevel gear 2. The first bevel gear 2 is linked with the vertically mounted second bevel gear 3, which is linked with the lead screw 4. A nut 5 that can move along the lead screw 4 is mounted on the lead screw. After the nut 5 passes through the bearing seat 14, its end is connected to the bearing bush. That is, the first drive motor 1 can control the movement of the bearing bush 6 in the horizontal direction.

[0029] The online detection module uses the second drive motor 7 as a power source. The second drive motor 7 is also mounted on the motor base. The motor base is linked to the rack 9 through the gear 8. The rack 9 moves along the horizontally set guide rail 10 and is linked to the bracket 11. The end of the bracket 11 is equipped with a probe 12. The probe 12 is located above the bearing 6 and close to the gap between the main shaft 13 and the bearing.

[0030] The work process is as follows:

[0031] During initial installation, the first drive motor 1 brings all the bearing bushes 6 around the main shaft into contact with it. At this point, the gap between the bearing bushes 6 and the main shaft 13 is set to 0. The first drive motor 1 is then controlled to rotate, which is converted into rotational motion of the lead screw 4 via the first bevel gear 2. This motion, through the nut 5, causes the bearing bushes 6 to move away from the main shaft, thus adjusting the gap between the bearing bushes 6 and the main shaft. Ultimately, precise control of the gaps between multiple bearing bushes 6 is achieved through the control of multiple first drive motors 1. Simultaneously, after the bearing bushes 6 are initially installed, the second drive motor 7, via gear 8, moves the rack 9 and the bracket fixed to the rack 9 away from the bearing bushes 6, preventing interference between the probe and the main shaft during main rotation.

[0032] When the bearing bush 6 needs maintenance, the first drive motor 1 moves the bearing bush 6 away from the main shaft under the action of the nut 5, increasing the gap between the bearing bush 6 and the main shaft. Next, the second drive motor 7, via the gear 8, moves the rack 9 and the bracket fixed to the rack 9 closer to the bearing bush 6 until it reaches its position. A probe can then remotely inspect the surface condition of the bearing bush 6 without requiring disassembly as in traditional manual maintenance. After the bearing bush inspection is completed, the operation is reversed to restore the bearing bush gap.

[0033] The above are merely specific embodiments of this utility model. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this utility model are for reference only and are not absolute limitations. Any non-substantial modifications made to this utility model shall be considered as infringing upon the protection scope of this utility model.

Claims

1. A bearing shell gap adjustment structure, characterized by: include The first drive motor controls the nut to move horizontally on the lead screw. The nut is connected to the outer surface of the bearing bush, thereby allowing the first drive motor to control the displacement of the bearing bush relative to the main shaft. The second drive motor controls the rack to translate, and the rack drives the bracket to move. The bracket is equipped with a probe close to the outer surface of the bearing. The first drive motor and the second drive motor are both mounted on the same motor mount, with the probe positioned above the motor mount and the nut positioned below the motor mount.

2. A bearing shell gap adjustment structure according to claim 1, characterised in that: The first drive motor is linked to the lead screw via a pair of bevel gears.

3. A bearing clearance adjustment structure according to claim 1 or 2, characterized in that: The second drive motor first links with the gear, and the gear then drives the rack to move horizontally, with the rack moving along a horizontally set guide rail.

4. A bearing clearance adjustment structure according to claim 1 or 2, characterized in that: The bearing bush is located between the main shaft and the bearing housing, and the nut passes through the bearing housing.

5. The bearing clearance adjustment structure according to claim 3, characterized in that: The first drive motor is vertically positioned relative to the motor base. The first drive motor is first linked with the horizontally positioned first bevel gear, and the first bevel gear is linked with the vertically positioned second bevel gear.

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