Adjusting tool for wear-resistant sealing plate of main shaft

Abstract

A spindle seal wear-resistant plate adjusting tool comprises a center disc, the center disc is connected with a rotating seat through a center rotating shaft, and the rotating seat is connected with a rotating arm. A plurality of supporting arms are arranged on the central disc and annularly arranged around the central rotating shaft, and abutting parts are arranged at the ends of the supporting arms; a data acquisition device is arranged at the outer end part of the rotating arm. The adjusting tool does not depend on unit barring to measure the end jump of the abrasion-resistant plate, the operation space is large, the straight line construction period after maintenance does not need to be occupied, the maintenance efficiency is improved, the safety of operators can be guaranteed, and the measurement efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of adjusting the anti-wear plate of a main shaft of a hydropower station, and particularly relates to an adjusting tool for a main shaft sealing anti-wear plate. Background Art

[0002] When replacing or adjusting the anti-wear plate of the main shaft seal of the hydro-turbine generator set, the anti-wear plate needs to be adjusted to be horizontal in both the circumferential and radial directions. Otherwise, the water sealing performance of the main shaft seal will be affected, which may easily cause a series of problems such as large water leakage, large consumption of clean water, and increased wear of the seal block, thus affecting the safe and stable operation of the unit;

[0003] Existing methods for adjusting the wear plate include the end runout measurement method using a dial indicator, the combination of the coincident level method and the end runout measurement method using a dial indicator, and the combination of the Cayeri method and the end runout measurement method using a dial indicator. These methods all require the use of a dial indicator to measure the end runout of the inner and outer rings of the wear plate, and are often performed during the turning process after repair. Multiple readings are required during the turning process, which greatly affects the overall efficiency of the turning work and thus occupies the linear working period of the turning process after repair. In addition, when adjusting the level of the wear plate, the space at the main shaft seal is small, which makes the work inconvenient, and there are certain safety risks in measuring when the unit is rotating.

[0004] Therefore, it is necessary to make a set of tooling that can measure the end jump of the anti-wear plate without relying on the unit turning. It has a large operating space and does not need to occupy the straight line period after repair, which improves the maintenance efficiency and increases the safety of operators. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a main shaft seal anti-wear plate adjustment tool. The adjustment tool does not rely on the unit turning to measure the end jump of the anti-wear plate. The operation space is large and does not need to occupy the straight line period after repair. The maintenance efficiency is improved, the safety of the operating personnel is guaranteed, and the measurement efficiency is improved.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A spindle seal anti-wear plate adjustment tool comprises a center disk, which is connected to a rotating seat through a center rotating shaft, and the rotating seat is connected to a rotating arm; a plurality of support arms are arranged on the center disk, and the plurality of support arms are arranged in a ring around the center rotating shaft, and abutment portions are provided at the ends of the support arms; a data acquisition device is provided at the outer end of the rotating arm.

[0008] Preferably, the data acquisition device comprises a sensor mounting seat connected to the rotating arm, the sensor mounting seat is provided with a strip-shaped mounting hole, and a plurality of eddy current sensors are provided on the strip-shaped mounting hole.

[0009] Preferably, an inclination sensor is provided on the rotating arm.

[0010] Preferably, the rotating seat is connected to the central rotating shaft through a bearing, and the rotating seat is driven to rotate by a stepping motor.

[0011] Preferably, the abutting portion is an L-shaped abutting plate, which is used to abut against the inner wall of the anti-wear plate, and a clamping bolt is provided on the L-shaped abutting plate.

[0012] Preferably, a plurality of supporting legs are provided at the bottom of the central plate.

[0013] The utility model can achieve the following beneficial effects:

[0014] 1. This adjustment tool does not rely on the unit turning to measure the end jump of the anti-wear plate. It has a large operating space and does not need to occupy the straight line construction period after repair, which improves the maintenance efficiency, ensures the safety of operators, and improves the measurement efficiency.

[0015] 2. This device has a simple structure and strong practicality. It effectively improves the adjustment and measurement process of the spindle seal anti-wear plate. The level of the anti-wear plate is adjusted outside the foundation pit and does not occupy the maintenance period.

[0016] 3. This tooling does not rely on the turning of the unit. The end jump of the anti-grinding plate can be measured whether the rotor is hoisted out of the foundation pit or not, avoiding various risks brought by the turning method. At the same time, the measurement space is large and the measurement accuracy is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a top view of the utility model;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 for Figure 1 Middle EE section view;

[0021] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0022] In the figure: center disk 1, rotating seat 2, rotating arm 3, support arm 4, data acquisition device 5, sensor mounting seat 501, strip mounting hole 502, eddy current sensor 503, inclination sensor 6, stepper motor 7, L-shaped abutment plate 8, tightening bolt 9, support leg 10, lip seal 11, center shaft 12, bearing 13, main shaft sleeve 14. DETAILED DESCRIPTION

[0023] The preferred solution is Figures 1 to 4As shown, a main shaft seal anti-wear plate adjustment tool includes a center disk 1, which is connected to a rotating seat 2 through a center rotating shaft 12, and the rotating seat 2 is connected to a rotating arm 3; a plurality of support arms 4 are provided on the center disk 1, and the plurality of support arms 4 are arranged in a ring around the center rotating shaft, and abutment portions are provided at the ends of the support arms 4; a data acquisition device 5 is provided at the outer end of the rotating arm 3.

[0024] The data acquisition device 5 comprises a sensor mounting seat 501 connected to the rotating arm 3 . The sensor mounting seat 501 is provided with a strip-shaped mounting hole 502 . A plurality of eddy current sensors 503 are provided on the strip-shaped mounting hole 502 .

[0025] The application of eddy current sensors in end runout measurement has accumulated experience for future sensor selection. The eddy current sensor measures the relative position of the wear plate and the sensor based on the eddy current effect principle, thereby reflecting the level of the wear plate.

[0026] The rotating arm 3 is provided with an inclination sensor 6, specifically a dual-axis inclination sensor. The inclination sensor is applied to the tooling to make the horizontal adjustment more intuitive.

[0027] Furthermore, the rotating seat 2 is connected to the central rotating shaft through a bearing, and the rotating seat 2 is driven to rotate by a stepper motor 7. By using the stepper motor control, the rotating arm 3 is continuously and fixed-point controlled.

[0028] Furthermore, the abutting portion is an L-shaped abutting plate 8 , which is used to abut against the inner wall of the anti-wear plate, and a clamping bolt 9 is provided on the L-shaped abutting plate 8 .

[0029] Furthermore, a plurality of supporting legs 10 are provided at the bottom of the center plate 1 .

[0030] Embodiment 1:

[0031] This tool is used for end runout measurement and end runout data analysis of the main shaft seal anti-wear plate outside the pit of a hydropower unit in a power station. The tool is installed on the flange surface of the runner, and the end runout measurement range is φ4080mm-φ4310mm annular belt.

[0032] The center plate 1 of the tooling is connected to the flange surface on the rotating wheel, the deviation between the center of the tooling and the center of the boring hole on the central body of the rotating wheel is not greater than 0.05mm, and the rotation level of the tooling rotating arm 3 is not greater than 0.02mm / m.

[0033] The bearing accuracy of the tooling is required to be within 0.02mm. The swing of the rotating arm 3 of the tooling is no more than 0.02mm after one rotation. The error of any point on the wear-resistant plate is no more than 0.02mm after repeated measurements.

[0034] Two sets of data acquisition devices are arranged in front and behind the measuring position. The data acquisition device adopts a high-precision eddy current sensor (including a signal collector and a digital display, with a charging function. After a single charge, the continuous use time is not less than 4 hours). It also has a dial indicator measurement function. The eddy current sensor has a measurement range of 2 to 5mm and a measurement accuracy of less than 0.02mm. Data is measured at a fixed point in each circle. After the measurement is completed, the digital display automatically forms a broken line for the data.

[0035] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A spindle seal anti-wear plate adjustment tool, characterized in that: The device comprises a central disk (1), wherein the central disk (1) is connected to a rotating seat (2) via a central rotating shaft, and the rotating seat (2) is connected to a rotating arm (3); a plurality of supporting arms (4) are provided on the central disk (1), the plurality of supporting arms (4) are arranged in a ring around the central rotating shaft, and abutment portions are provided at the ends of the supporting arms (4); and a data acquisition device (5) is provided at the outer end of the rotating arm (3).

2. The spindle seal anti-wear plate adjustment tool according to claim 1, characterized in that: The data acquisition device (5) comprises a sensor mounting seat (501) connected to the rotating arm (3), the sensor mounting seat (501) being provided with a strip-shaped mounting hole (502), and a plurality of eddy current sensors (503) being provided on the strip-shaped mounting hole (502).

3. The main shaft seal anti-wear plate adjustment tool according to claim 1, characterized in that: The rotating arm (3) is provided with an inclination sensor (6).

4. The main shaft seal anti-wear plate adjustment tool according to claim 1, characterized in that: The rotating seat (2) is connected to the central rotating shaft via a bearing, and the rotating seat (2) is driven to rotate by a stepping motor (7).

5. The main shaft seal anti-wear plate adjustment tool according to claim 1, characterized in that: The abutting portion is an L-shaped abutting plate (8), which is used to abut against the inner wall of the anti-wear plate, and a clamping bolt (9) is provided on the L-shaped abutting plate (8).

6. The spindle seal anti-wear plate adjustment tool according to claim 1, characterized in that: A plurality of supporting legs (10) are provided at the bottom of the central plate (1).

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