Upper guide shoe gap adjusting device and gap adjusting method

Abstract

The invention relates to the technical field of hydro-generator maintenance, and provides an upper guide shoe gap adjusting device and a gap adjusting method.The upper guide shoe gap adjusting device comprises an adjusting mechanism detachably installed on an upper guide cushion block and used for driving a wedge to move up and down relative to the upper guide cushion block; the first sensor is used for detecting the height of the wedge; the second sensor is used for detecting whether the upper guide shoe is tightly attached to the upper end shaft or not; the controller is electrically connected with the adjusting mechanism, the first sensor and the second sensor and used for controlling the adjusting mechanism to act according to detection data of the first sensor and the second sensor. Various data in the gap adjusting process are detected through the sensor, the height of the wedge is automatically adjusted according to the detected data, then accurate and rapid adjustment of the upper guide shoe gap is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of hydro-generator maintenance technology, specifically to an upper guide bearing clearance adjustment device and clearance adjustment method. Background Technology

[0002] The clearance adjustment of the upper guide bearing of the hydro-generator is mainly achieved by adjusting the height of the wedge on the bearing clamping device to adjust the clearance between the wedge and the upper shaft (i.e., the movable clearance of the upper guide bearing). A structural diagram of the upper guide bearing, upper shaft, and bearing clamping device is shown below. Figure 1 , 2 As shown. Currently, the existing adjustment method requires the use of nearly 20 tools, including dial indicators, feeler gauges, adjustable wrenches, and open-end wrenches. The adjustment process involves first pulling out the wedge, then tapping it downwards while continuously measuring the gap value. If the gap is too small, the wedge must be pulled up a certain height and tapped downwards again, repeating this process. Because the wedge surface is smooth and subject to significant clamping force, it is difficult to pull out by hand. A special tool must be placed over the wedge, and a force bar must be inserted between the vertical hole of the tool and the vertical hole of the wedge. A wrench must be used to turn the set screw clockwise to pull out the wedge. This is extremely time-consuming and labor-intensive. Furthermore, the gap requirement is very small, typically only 0.3mm, and the error cannot exceed 0.01mm. Conventional measuring rulers are not easy to operate and affect measurement accuracy. These factors make adjusting the upper guide tile gap exceptionally difficult. Calculations show that adjusting the gap of each upper guide tile takes an average of 1.38 hours, severely impacting production efficiency. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention designs an upper guide tile gap adjustment device and a gap adjustment method.

[0004] This invention is achieved through the following technical solution: an upper guide tile gap adjustment device, comprising:

[0005] The adjustment mechanism is detachably mounted on the upper guide block and is used to drive the wedge to move up and down relative to the upper guide block.

[0006] The first sensor is used to detect the height of the wedge;

[0007] The second sensor is used to detect whether the upper guide plate is in close contact with the upper shaft.

[0008] The controller is electrically connected to the adjustment mechanism, the first sensor, and the second sensor, and is used to control the operation of the adjustment mechanism based on the detection data from the first sensor and the second sensor.

[0009] Furthermore, the adjustment mechanism includes a frame, an up-and-down drive assembly mounted on the frame, and a wedge clamping assembly mounted on the up-and-down drive assembly.

[0010] The up-and-down drive assembly includes a screw mounted on the frame and a motor mounted on the screw.

[0011] The wedge clamping assembly includes a slide plate mounted on a frame, a pressure block mounted on the slide plate, and a bolt mounted on the slide plate; the frame has grooves on opposite sides, and the two ends of the slide plate are respectively mounted on the two grooves; the pressure block is mounted on a screw, and the screw can drive the wedge clamping assembly to move up and down when it rotates.

[0012] The mounting plate of the frame has a detection hole, and the first sensor is mounted on the mounting plate so that the first sensor can detect the height value from the upper end face of the wedge to the upper surface of the mounting plate through the detection hole.

[0013] The frame has slots.

[0014] The present invention also discloses a gap adjustment method based on the above-described upper guide tile gap adjustment device, which includes the following steps:

[0015] Step 1: Install the upper guide tile gap adjustment device on the upper guide pad and connect it to the wedge;

[0016] Step 2: Drive the wedge downwards, causing it to push the upper guide plate to move upwards onto the shaft until the second sensor detects that the upper guide plate is in contact with the shaft.

[0017] Step 3: The first sensor detects the height of the wedge when the upper guide plate is in contact with the upper shaft, and records this height value as the initial height value of the wedge;

[0018] Step 4: Calculate the final height of the wedge when adjusted to the target clearance value. The calculation formula is: H = h + (t / k); where H is the final height of the wedge, h is the initial height of the wedge, t is the target clearance value, and k is the slope of the wedge.

[0019] Step 5: Drive the wedge upwards to reach the final height value, thus completing the upper guide tile gap adjustment.

[0020] Compared with the prior art, the embodiments of this application have the following beneficial effects: the present invention uses sensors to detect various data during the gap adjustment process, and automatically adjusts the height of the wedge based on the detected data, thereby achieving precise and rapid adjustment of the upper guide tile gap and improving work efficiency. Attached Figure Description

[0021] The accompanying drawings, which are provided to further illustrate this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute a limitation thereof. In the drawings, the same reference numerals denote the same components.

[0022] Figure 1This is a schematic diagram of the assembly between the upper guide plate, the bearing device, and the upper shaft.

[0023] Figure 2 This is a schematic diagram of the tile-holding device.

[0024] Figure 3 This is a schematic diagram of the adjustment mechanism of the present invention.

[0025] Figure 4 This is a schematic diagram of the adjustment mechanism of the present invention installed on the upper guide pad.

[0026] The reference numerals in the above figures are: 1-frame, 2-pressure block, 3-inspection hole, 4-screw, 5-mounting plate, 6-slide groove, 7-slide plate, 8-groove, 9-bolt. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] It should be noted that if the terms "first," "second," etc., are used in the specification, claims, and accompanying drawings of this application, they are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] In this application, when terms such as "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" are used, they indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] Furthermore, in this application, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Example

[0034] This embodiment discloses an upper guide bearing clearance adjustment device, which is used to adjust the movable clearance of the upper guide bearing of a water turbine. The following is a brief description of the upper guide bearing assembly of the water turbine to better illustrate the upper guide bearing clearance adjustment device in this embodiment.

[0035] In the upper guide bearing assembly of a water turbine, multiple upper guide bearings are mounted around the upper shaft via bearing supports; the number of upper guide bearings is typically 12. A bearing-holding device is installed on the upper guide bearing seat; the gap between the upper guide bearings is adjusted by adjusting the wedges of the bearing-holding device. Figure 1 As shown. Specifically, as... Figure 2 As shown, the bearing device includes an upper guide block and a wedge. The upper guide block has a U-shaped slot, and the wedge is inserted into the U-shaped slot. The thickness of the wedge gradually decreases from top to bottom, making its side facing the U-shaped slot a slope. The slope of the wedge is fixed, such as 1:25. Therefore, adjusting the height of the wedge adjusts the gap between the wedge and the upper shaft (i.e., the movable gap of the upper guide bearing). The upper guide bearing gap adjustment device in this embodiment is used to automatically adjust the upper guide bearing gap.

[0036] Specifically, the upper guide tile gap adjustment device includes: an adjustment mechanism, a first sensor, a second sensor, and a controller. The adjustment mechanism is detachably mounted on the upper guide pad and is used to move the wedge up and down relative to the upper guide pad. The first sensor, used to detect the height of the wedge, can be mounted on the adjustment mechanism. The second sensor is used to detect whether the upper guide tile is tightly against the upper shaft; in use, the second sensor can be fixed to the upper shaft by adhesive or suspension via a bracket. The first and second sensors can be distance sensors, such as infrared distance sensors. The controller can be located on the adjustment mechanism and is electrically connected to the adjustment mechanism, the first sensor, and the second sensor, used to control the operation of the adjustment mechanism based on the detection data from the first and second sensors.

[0037] Specifically, such as Figure 3 As shown, the adjustment mechanism includes a frame 1, a vertical drive assembly mounted on the frame 1, and a wedge clamping assembly mounted on the vertical drive assembly. The frame 1 includes two vertically parallel side plates and a mounting plate 5 connected to the top of the two side plates. The vertical drive assembly includes a screw 4 and a motor (not shown). The lower end of the screw 4 passes through the mounting plate 5, and the motor is mounted on the mounting plate 5 and connected to the upper end of the screw 4, enabling the motor to drive the screw 4 to rotate. The wedge clamping assembly includes a sliding plate 7 mounted on the frame 1, a pressure block 2 mounted on the sliding plate 7, and a bolt 9 mounted on the sliding plate 7. Each of the two side plates of the frame 1 has a groove 6, and the two ends of the sliding plate 7 are respectively mounted on the two grooves 6. The pressure block 2 is threaded to the lower part of the screw 4, and when the motor drives the screw 4 to rotate, it can move the entire wedge clamping assembly up and down along the grooves 6. Furthermore, the motor is electrically connected to a controller, and its operation is controlled by the controller.

[0038] The mounting plate 5 of the frame 1 has a detection hole 3. The first sensor is mounted on the mounting plate 5 and corresponds to the position of the detection hole 3. The detection end of the first sensor is flush with the upper surface of the mounting plate 5. Therefore, the first sensor can detect the height value from the upper end face of the wedge to the upper surface of the mounting plate 5 through the detection hole 3.

[0039] In addition, grooves 8 are provided on both side plates of the frame 1, and the two sides of the upper guide pad can be inserted into the grooves 8, thereby installing the entire adjustment mechanism on the upper guide pad.

[0040] The method for adjusting the gap of the upper guide tile using the above-mentioned upper guide tile gap adjustment device is as follows:

[0041] Step 1: Install the upper guide pad clearance adjustment device on the upper guide pad and connect it to the wedge. Specifically, insert both sides of the upper guide pad into the grooves 8 of the frame 1 and tighten them with bolts. During installation, ensure that the mounting plate 5 of the frame is horizontal. Then, fix the second sensor on the upper shaft. The second sensor is located above the upper guide pad to ensure that it can detect when the upper guide pad is close to the upper shaft. Next, screw the bolt 9 onto the slide plate 7 and pass the bolt 9 through the oblong hole on the wedge. The bolt 9 and the oblong hole are clearance fitted. Figure 4 As shown.

[0042] Step 2: After the entire upper guide tile gap adjustment device is installed, the controller controls the motor to rotate forward, and the entire wedge clamping assembly moves downward. At this time, bolt 9 moves downward relative to the waist-shaped hole on the wedge until the lower surface of the pressure block 2 abuts against the upper surface of the wedge. The wedge moves downward under the pressure of the pressure block 2. Because the wedge has an inclined surface, the wedge will also move towards the U-shaped slot protruding from the upper guide pad during its downward movement, thereby pushing the upper guide tile towards the upper shaft. When the upper guide tile is in close contact with the upper shaft, the signal of the second sensor is blocked. At this time, the second sensor detects that the upper guide tile is in close contact with the upper shaft, and the detection signal of the second sensor is sent to the controller, which controls the motor to stop working.

[0043] Step 3: The first sensor detects the height of the wedge when the upper guide plate is in contact with the upper shaft. That is, the first sensor detects the height from the upper surface of the upper guide plate to the upper surface of the mounting plate 5, and records this height as the initial height of the wedge.

[0044] Step 4: The controller calculates the final height of the wedge when adjusted to the target gap value based on the wedge's slope, the target gap value to be adjusted, and the initial height value. The calculation formula is: H = h + (t / k); where H is the final height of the wedge, h is the initial height of the wedge, t is the target gap value, and k is the wedge's slope. For example, if the target gap value to be adjusted is 0.3mm, the wedge's slope is 1:25, and the initial height of the wedge is 100mm, then the calculated final height of the wedge is 107.5mm; that is, when the height of the wedge is adjusted to be 107.5mm between its upper surface and the upper surface of the mounting plate 5, the wedge gap is the required 0.3mm.

[0045] Step 5: The controller drives the motor to reverse, and the entire wedge clamping assembly moves upward. When the bolt 9 abuts against the upper end of the waist-shaped hole, the wedge moves upward under the tension of the bolt 9 until the first sensor detects that the height from the upper surface of the wedge to the upper surface of the mounting plate 5 reaches the final height value. At this time, the controller controls the motor to stop working. At this time, the gap of the upper guide tile reaches the set gap value, and the upper guide tile gap adjustment is completed.

[0046] This embodiment uses sensors to detect various data during the gap adjustment process and automatically adjusts the wedge height based on the detected data, thereby achieving precise and rapid adjustment of the upper guide tile gap and improving work efficiency.

[0047] It should be noted that all features disclosed in this specification, or all steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0048] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this invention, and these solutions all fall within the scope of this invention and its protection. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this invention is defined by the claims and their equivalents.

Claims

1. A device for adjusting the gap of an upper guide tile, characterized in that, include: The adjustment mechanism is detachably mounted on the upper guide block and is used to drive the wedge to move up and down relative to the upper guide block. The first sensor is used to detect the height of the wedge; The second sensor is used to detect whether the upper guide plate is in close contact with the upper shaft. The controller is electrically connected to the adjustment mechanism, the first sensor, and the second sensor, and is used to control the operation of the adjustment mechanism based on the detection data from the first sensor and the second sensor.

2. The upper guide tile gap adjustment device according to claim 1, characterized in that, The adjustment mechanism includes a frame (1), an up-and-down drive assembly mounted on the frame (1), and a wedge clamping assembly mounted on the up-and-down drive assembly.

3. The upper guide tile gap adjustment device according to claim 2, characterized in that, The up-down drive assembly includes a screw (4) mounted on the frame (1) and a motor mounted on the screw (4).

4. The upper guide tile gap adjustment device according to claim 3, characterized in that, The wedge clamping assembly includes a slide plate (7) on the frame (1), a pressure block (2) on the slide plate (7), and a bolt (9) on the slide plate (7); the frame (1) has grooves (6) on opposite sides, and the two ends of the slide plate (7) are respectively installed on the two grooves (6); the pressure block (2) is installed on the screw (4), and the screw (4) can drive the wedge clamping assembly to move up and down when it rotates.

5. The upper guide tile gap adjustment device according to claim 2, characterized in that, The mounting plate (5) of the frame (1) is provided with a detection hole (3). The first sensor is mounted on the mounting plate (5) so that the first sensor can detect the height value from the upper end face of the wedge to the upper surface of the mounting plate (5) through the detection hole (3).

6. The upper guide tile gap adjustment device according to claim 2, characterized in that, The frame (1) is provided with a groove (8).

7. A gap adjustment method based on the upper guide tile gap adjustment device according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Install the upper guide tile gap adjustment device on the upper guide pad and connect it to the wedge; Step 2: Drive the wedge downwards, causing it to push the upper guide plate to move upwards onto the shaft until the second sensor detects that the upper guide plate is in contact with the shaft. Step 3: The first sensor detects the height of the wedge when the upper guide plate is in contact with the upper shaft, and records this height value as the initial height value of the wedge; Step 4: Calculate the final height of the wedge when adjusted to the target clearance value. The calculation formula is: H = h + (t / k); where H is the final height of the wedge, h is the initial height of the wedge, t is the target gap value, and k is the slope of the wedge. Step 5: Drive the wedge upwards to reach the final height value, thus completing the upper guide tile gap adjustment.

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