Block type guide bearing clearance measuring device, system and method

Abstract

The invention discloses a block type guide bearing clearance measuring device, system and method, and belongs to the technical field of hydro-generator measurement, and the block type guide bearing clearance measuring device comprises a guide bearing bush and a gas electricity meter; a through air hole is formed in the guide bearing bush; the outlet ends of the air holes extend to one side surface, facing the shaft collar, of the guide bearing bush, and the inlet ends extend to the other side surface of the guide bearing bush; a channel of the gas electricity meter is connected with the inlet end of the gas hole through a gas pipe, gas is conveyed into the gas hole, and the value of the gap between the guide bearing bush and the shaft collar is calculated through the measured gas flow or gas pressure. According to the block type guide bearing gap measuring device, system and method, non-contact measurement is carried out on the gap between the guide bearing bush and the collar in a guide bearing structure, spindle displacement caused by pushing of the guide bearing bush during conventional measurement is avoided, multi-channel synchronous measurement and automatic data acquisition and analysis are supported, and the block type guide bearing gap measuring device, system and method are high in precision, high in efficiency and high in interference resistance.

Description

Technical Field

[0001] This invention relates to the field of hydro-generator measurement technology, specifically to a segmented guide bearing clearance measuring device, system, and method. Background Technology

[0002] In the operating system of a hydro-generator unit, the guide bearing is a crucial component. It primarily bears the radial mechanical imbalance force of the rotating parts and the unilateral electromagnetic imbalance force caused by rotor eccentricity, thus ensuring stable unit operation by constraining the main shaft runout. Based on their installation location and function, guide bearings are typically classified into upper guide bearings (located above the generator rotor), lower guide bearings (shared with the guide oil groove, located below the generator rotor), and turbine guide bearings (located above the turbine rotor). All three types of guide bearings generally employ a segmented bearing structure design. Within the guide bearing structure, the "clearance between the guide bearing shell and the shaft collar" is a core technical parameter. If this clearance exceeds the design range, it will lead to an abnormal increase in main shaft runout, accelerated localized wear of the guide bearing shell, and in severe cases, excessive unit vibration or even shutdown. Therefore, precise measurement of this clearance is essential. The current mainstream method for measuring guide bearing clearance in the industry requires a complex preliminary preparation process and a measurement process that relies on manual operation. The specific implementation steps are as follows: First, the lubricating oil in the upper guide oil groove, the pushing guide oil groove (shared with the lower guide), and the water guide oil groove must be completely drained. Then, the covers of each oil groove and the associated temperature and vibration measuring components are removed to break the closed environment of the oil groove. During the measurement stage, the operator needs to push the segmented guide bearing shells one by one to a state of close contact with the shaft collar. Then, by manually adjusting the guide bearing support structure (such as the support structure of the pillar bolt, the support structure of the eccentric pin, the support structure of the spherical surface, or the support structure of the wedge plate), the displacement of the guide bearing shells during the pushing process is measured using mechanical measuring tools such as dial indicators and micrometers. Finally, the actual clearance value between the guide bearing shell and the shaft collar is indirectly calculated through the displacement data. However, the aforementioned traditional measurement methods have significant technical bottlenecks in practical applications, making it difficult to meet the high-precision and high-efficiency operation and maintenance requirements of modern hydro-generator units: ① Low measurement accuracy: This method relies on manual operation to control the pushing force of the guide bearing and the reading of the measuring instrument. Furthermore, the method of indirectly calculating the clearance through the displacement of the guide bearing introduces a secondary conversion error, resulting in a final measurement error generally exceeding 0.01mm. This fails to meet the micron-level clearance measurement accuracy requirements of current units developing towards higher speeds and larger capacities, easily leading to clearance adjustment deviations due to insufficient accuracy, thus creating potential operational hazards for the unit; ② Extremely low measurement efficiency: Under normal conditions, the "pure clearance adjustment" of the upper guide, lower guide, and water guide bearings of the hydro-generator unit... The operation, calculated at 30 minutes per watt, typically requires 8-12 man-days; if a complete overhaul including disassembly / cleaning / reassembly is included, it requires approximately 24-36 man-days, with a total time consumption of about 4-6 days. This not only consumes a large amount of labor costs but also significantly extends the unplanned downtime of the unit, seriously affecting power generation efficiency and making it difficult to meet the power system's demand for rapid unit maintenance; ③ The operation is highly complex and dependent, requiring operators to manually control the guide shaft bearing pushing speed and stroke during the measurement process, while precisely adjusting different types of support structures, which places high demands on the professional skills and operational experience of the personnel. The verification requirements are extremely high. In actual operation, human factors such as uneven pushing force and deviation of measuring tool placement can easily lead to distortion of measurement data, further reducing the reliability of measurement results; ④ Synchronous measurement cannot be achieved. Traditional methods require measuring each guide bearing piece in sequence, which cannot simultaneously obtain the gap data of all guide bearing pieces. It is difficult to intuitively reflect the overall gap distribution of the guide bearing, and it is impossible to detect the uneven gap distribution caused by problems such as shaft roundness deviation in a timely manner. This is not conducive to evaluating the operating status of the guide bearing from an overall perspective, and increases the difficulty of troubleshooting potential faults of the unit. In summary, the existing methods for measuring the clearance of guide bearings in hydro-generator units suffer from technical defects such as low accuracy, low efficiency, complex operation, and inability to perform synchronous measurements. These defects have become key bottlenecks restricting the improvement of unit operation and maintenance quality and efficiency, and there is an urgent need to propose a new measurement technology solution that can overcome these limitations. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned shortcomings by providing a segmented guide bearing clearance measurement device, system, and method. This method enables non-contact measurement of the clearance between the guide bearing bush and the bearing collar in the guide bearing structure, avoiding spindle displacement caused by pushing the guide bearing bush. It also supports multi-channel synchronous measurement and automated data acquisition and analysis, and offers high accuracy, high efficiency, and strong anti-interference capabilities. To achieve the above objectives, this invention provides the following technical solution: A segmented guide bearing clearance measuring device includes a guide bearing bush and a gas-electric meter; the guide bearing bush has a through-hole; the outlet end of the gas hole extends to one side of the guide bearing bush facing the bearing collar, and the inlet end extends to the other side of the guide bearing bush; the channel of the gas-electric meter is connected to the inlet end of the gas hole through a gas pipe, and gas is supplied into the gas hole, and the clearance value between the guide bearing bush and the bearing collar is calculated by measuring the gas flow rate or gas pressure.

[0004] Furthermore, the inlet end of the air vent is provided with a threaded quick connector; the quick connector is matched with the air pipe connector.

[0005] Furthermore, the quick connector has a sealing element at its threaded portion; the sealing element is made of nitrile rubber or fluororubber.

[0006] Furthermore, the outlet end of the air hole is provided with a nozzle; the edge of the nozzle is rounded and flush with the surface of the guide shaft bearing.

[0007] Furthermore, the gas meter is equipped with a flow sensor or a pressure sensor on the gas pipe connected to the gas port.

[0008] Furthermore, the diameter of the pores is 0.1~5mm.

[0009] A segmented guide bearing clearance measurement system includes a control device, a gas-electric meter, and multiple guide bearing bushes as described above; the guide bearing bushes are connected to the channel of the gas-electric meter via air pipes; the control device is electrically connected to the gas-electric meter.

[0010] Furthermore, the control device includes a control unit, a data unit, and a display unit; the control unit is used to control the start and stop of the gas-electric meter channel; the data unit is used to collect, process, and store data; and the display unit is used to display the results.

[0011] A method for measuring the clearance of a segmented guide bearing, using the aforementioned segmented guide bearing clearance measurement system to measure the clearance between the guide bearing bush and the bearing collar, includes the following steps: S1: Calibrate the gas-electric meter. Connect the channels of the gas-electric meter to the air holes of the standard gap block through the air tubes. Start the gas-electric meter and calibrate the zero point and range of the gas-electric meter channel to establish the airflow-gap reference curve. S2: Install the gas-electric meter and connect the gas-electric meter's channel to the inlet end of each guide bearing in the corresponding segmented guide bearing through the gas pipe; S3: Start measurement, turn on the air source, and input constant pressure gas into the air hole through the air pipe. The system enters a stable operating state, and the gas flow rate in the air hole of each guide bearing is measured to obtain the clearance value between each guide bearing and the shaft collar. S4: Results Analysis.

[0012] Furthermore, in step S1, the gap value of the standard gap block is the design value of the gap between the guide bushing and the shaft collar.

[0013] The beneficial effects of this invention are: This invention discloses a segmented guide bearing clearance measuring device, system, and method, including a guide bearing bush and a gas-electric meter. The guide bearing bush has a through-hole; the outlet end of the gas hole extends to one side of the guide bearing bush facing the shaft collar, and the inlet end extends to the other side of the guide bearing bush. The channel of the gas-electric meter is connected to the inlet end of the gas hole via a gas pipe, and gas is supplied into the gas hole. The clearance value between the guide bearing bush and the shaft collar is calculated by measuring the gas flow rate or gas pressure. The segmented guide bearing clearance measuring device, system, and method of this invention enables non-contact measurement of the clearance between the guide bearing bush and the shaft collar in a guide bearing structure, avoiding spindle displacement caused by pushing the guide bearing bush during conventional measurements. It also supports multi-channel synchronous measurement and automated data acquisition and analysis, and features high accuracy, high efficiency, and strong anti-interference capabilities. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the gap measuring device and shaft collar structure of the present invention, when the gap between the guide bearing and the shaft collar is small; Figure 2 This is a schematic diagram of the gap measuring device and shaft collar structure of the present invention. When the gap between the guide bearing and the shaft collar is large; Figure 3 This is a schematic diagram of the gap measuring device and shaft collar from another perspective of the present invention; Figure 4 For the present invention Figure 1 Enlarged view at point A, showing the situation when the gap between the guide bearing and the shaft collar is small; Figure 5 For the present invention Figure 2 Enlarged view at point B, showing the situation when the gap between the guide bearing and the shaft collar is large; In the attached diagram: 1-guide shaft bearing, 2-air hole, 21-inlet end, 22-outlet end, 3-gas and electricity meter, 4-shaft collar, 5-anti-weight screw, 6-bearing seat. Detailed Implementation

[0015] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0016] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also mean including the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0017] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0018] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. The meaning of such spatial relative terms includes different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0019] The guide bearing of a hydro-generator is a crucial component of the generator bearing system. It primarily bears the mechanical imbalance force of the rotor and the unilateral magnetic pull caused by rotor eccentricity, and its main function is to prevent shaft sway. The segmented guide bearing mainly consists of a shaft collar 4, several guide bearing shells 1, anti-weight screws 5, and a bearing housing 6. Its core function is to achieve stable shaft support through the coordinated operation of multiple components. The main focus of this invention is on measuring the clearance between the guide bearing shells and the shaft collar, and... Figure 1 ~Appendix Figure 3 The positional relationship between the guide bearing and the shaft collar is shown in the figure. Other components are well known to those skilled in the art, so they will not be described in detail.

[0020] Example 1: See attached Figures 1-5 A segmented guide bearing clearance measuring device includes a guide bearing shell 1 and a gas-electric meter 3. The segmented guide bearing includes several guide bearing shells 1, which are mounted axially on a bearing seat 6 with a shaft collar 4 as the center via anti-weight screws 5. The guide bearing shell 1 of this invention has a through-hole 2, the diameter of which is 0.1–5 mm, preferably 0.3–3 mm. One end of the vent 2 extends to a side facing the surface of the shaft collar 4, serving as the gas outlet end 22, and the other end extends to the other side of the guide bearing shell 1, serving as the gas inlet end 21, as shown in the attached diagram. Figure 1 ~Appendix Figure 3As shown, it can be understood that the other side can be any other side of the guide bearing 1, as long as it is not the same side as the outlet end 22. Gas enters the vent 2 from the inlet end 21 and is ejected from the outlet end 22 into the gap between the guide bearing 1 and the shaft collar 4. A nozzle is provided at the outlet end 22 of the vent 2. The edge of the nozzle is rounded (R0.1~R0.2mm) and flush with the surface of the guide bearing 1. The vent 2 and nozzle inside the guide bearing 1 can be designed as an integrated unit, avoiding the deformation of the guide bearing 1 caused by mechanical force in traditional contact measurement. The measurement point is directly located on the friction surface, ensuring the authenticity of the data. A threaded quick connector is provided at the inlet end 21 of the air port 2. The quick connector mates with the air pipe connector of the gas-electric meter 3, and a seal is provided at the thread of the quick connector. The seal is made of nitrile rubber or fluororubber. The quick connector connects to the air pipe, allowing quick communication between the channel of the gas-electric meter 3 and the air port 2. The gas-electric meter 3 can be a single-channel gas-electric meter or a multi-channel gas-electric meter. When using a multi-channel gas-electric meter, only one channel of the multi-channel gas-electric meter needs to be connected. Compressed gas is introduced into the air port 2 through the gas-electric meter 3, and the compressed gas flows through the air port 2 into the space between the guide shaft bearing 1 and the shaft collar 4. (See attached diagram) Figure 4 and 5 As shown, since the gap between the guide bearing 1 and the shaft collar 4 is very small, the size of the gap affects the gas pressure and gas flow rate. When the gap value is large, more airflow passes through and the pressure drop is large; when the gap value is small, less airflow passes through and the pressure drop is small. According to the measurement principle of the gas-electric meter, there is a specific curved relationship between the gas flow rate and gas pressure and the gap value. A flow sensor or pressure sensor is installed on the gas pipe to measure the change in gas flow rate or pressure per unit time. The gap between the guide bearing 1 and the shaft collar 4 is calculated using the "gas flow rate or pressure" as a bridge.

[0021] Specifically, the gas-electricity meter 3 is a precision measuring instrument employing a comparative measurement method. It converts a length signal into a gas flow signal or a pressure signal, then converts it into an electrical signal via a gas-electric converter, and displays the value using a bar graph or digital display module. It consists of an air filter, a pressure regulator, a measuring indicator, and a measuring device. The compressed air in the delivery air port 2 passes through an air filter and is controlled by a pressure regulator to ensure stable gas pressure entering the air pipe. In this invention, the gas-electricity meter 3 can be a single-channel or multi-channel meter.

[0022] The segmented guide bearing clearance measuring device of the present invention calculates the clearance between the guide bearing bush 1 and the shaft collar 4 by measuring the gas flow rate or gas pressure flowing through the air pipe per unit time. This achieves non-contact measurement, avoids deformation of the guide bearing bush 1 caused by pushing the bearing bush, and features a simple structure and operation with high efficiency. Furthermore, the nozzle is set at the outlet end 22 and integrated into the guide bearing bush 1 to avoid external interference during the measurement process.

[0023] Example 2: A segmented guide bearing clearance measurement system includes a control device, a gas-electric meter 3, and multiple guide bearing shells 1 according to Embodiment 1. The guide bearing shells 1 in Embodiment 1 are mounted axially on bearing seats 6 with a bearing collar 4 as the center, via anti-weight screws 5. Each channel of the gas-electric meter 3 is connected to the corresponding air hole 2 of the guide bearing shell 1 via an air pipe. The gas-electric meter 3 is electrically connected to the control device. It is understood that the gas-electric meter 3 can be a single-channel gas-electric meter or a multi-channel gas-electric meter. When using a single-channel gas-electric meter, the number of gas-electric meters 3 must be the same as the number of guide bearing shells 1, with a one-to-one correspondence between guide bearing shells 1 and gas-electric meters 3. The channels of the guide bearing shell 1 and its corresponding gas-electric meter 3 are connected, and each gas-electric meter 3 is electrically connected to the control device. When using multiple single-channel gas-electric meters, it is only necessary to connect each guide bearing 1 to each channel of the gas-electric meter 3. The control device includes a control unit, a data unit, and a display unit. The control unit controls the start and stop of the gas-electric meter 3. By controlling the start of the gas-electric meter 3, it measures the corresponding channels of the guide bearing 1, obtaining the gap between each guide bearing 1 and the shaft collar 4. This achieves multi-channel synchronous measurement, improving efficiency. The data unit is used to collect, process, and store data. Flow sensors or pressure sensors detect changes in gas flow or pressure in real time and transmit this data to the gas-electric meter 3. The gas-electric converter converts the flow or pressure signals into electrical signals and transmits them to the data unit. The data unit performs data fitting based on different electrical signals, generating a gap distribution cloud map between each guide bearing 1 and the shaft collar 4, and saving the original data, analysis report, and gap cloud map. The display unit displays the results. It features a human-computer interaction design with a three-color light bar and digital display, synchronously updating multi-channel digital gap values, three-color light bar status, and gap distribution map in real time. Out-of-tolerance data is automatically marked and triggers an audible and visual alarm.

[0024] Example 3: A method for measuring the clearance of a segmented guide bearing, using the segmented guide bearing clearance measurement system in Embodiment 2 to simultaneously measure the clearance between the guide bearing bush 1 and the bearing collar 4, includes the following steps: S1: Calibrate the gas-electric meter 3. Calibration is performed using a standard gap block. The gap value of the standard gap block is the design value of the gap between the guide bearing 1 and the shaft collar 4. Assuming the design value is 0.33mm, the standard gap block used for calibration is 0.33mm (accuracy ±0.001mm). When using a single-channel gas-electric meter, each channel of the gas-electric meter 3 needs to be connected to the air hole 2 of the standard gap block via an air tube. Start the gas-electric meter 3 and perform measurements. Establish a gap-flow rate reference curve for the standard gap using the gas flow rate to sequentially calibrate the zero point and range of each channel of the gas-electric meter 3. When using multiple single-channel gas-electric meters, each channel of the gas-electric meter 3 needs to be connected to the air hole 2 of the standard gap block via an air tube. Start the gas-electric meter 3 and perform measurements. Establish a gap-flow rate reference curve for the standard gap using the gas flow rate to sequentially calibrate the zero point and range of each channel of the gas-electric meter 3.

[0025] S2: Install the gas-electric meter 3. When the gas-electric meter 3 is a single-channel gas-electric meter, connect each channel of the gas-electric meter 3 to the inlet end 21 of each guide bearing 1 in the corresponding segmented guide bearing through an air pipe; when the gas-electric meter 3 is a multi-channel gas-electric meter, connect each channel of the gas-electric meter 3 to the inlet end 21 of each guide bearing 1 in the corresponding segmented guide bearing through an air pipe, ensuring that the air pipe is not bent (bending radius ≥ 100mm).

[0026] S3: Start Measurement. The gas source and gas-electric meter 3 are activated via the control device. Compressed gas is filtered and dried by the air filter of the gas-electric meter 3, and then controlled by a pressure regulator to ensure stable gas pressure entering the gas pipe. The gas-electric converter of the gas-electric meter 3 converts the flow or pressure signal into an electrical signal and transmits it to the control device. The control device performs nonlinear compensation through calibration parameters to eliminate the influence of temperature and humidity, processes and stores the data, and finally generates a cloud map showing the distribution of gas flow or gas pressure between each guide bearing 1 and the shaft collar 4.

[0027] S4: Result Analysis. The display unit shows the real-time gap and gas flow curves between each guide bearing 1 and the shaft collar 4, comparing them with the established standard gap-flow reference curve. If the detected gap and gas curve is within the standard range, the corresponding light bar is displayed in green; if the gap value in the detected gap and gas curve is slightly larger, the corresponding light bar is displayed in orange. If the gap value in the detected gap and gas curve exceeds the tolerance, the corresponding light bar is displayed in red, and an alarm is triggered.

[0028] This invention relates to a segmented guide bearing clearance measuring device and system. Using a gas-electric meter, each channel can be independently sampled and processed in parallel. Data alignment is achieved through timestamp synchronization technology, and the measurement accuracy can reach the micrometer level, meeting the high-precision measurement requirements of generator guide bearing clearance. The automation of the measurement process shortens time and improves efficiency.

[0029] All technical features in this embodiment can be freely combined according to actual needs. The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

[0030] The above embodiments are preferred implementations of the present invention. In addition, other implementations are also included. Any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A segmented guide bearing clearance measuring device, characterized in that: It includes a guide bearing (1) and a gas meter (3); the guide bearing (1) has a through air hole (2); the outlet end (22) of the air hole (2) extends to one side of the guide bearing (1) facing the shaft collar (4), and the inlet end (21) extends to the other side of the guide bearing (1); the channel of the gas meter (3) is connected to the inlet end (21) of the air hole (2) through an air pipe, and supplies gas into the air hole (2), and calculates the gap value between the guide bearing (1) and the shaft collar (4) by measuring the gas flow rate or gas pressure.

2. The segmented guide bearing clearance measuring device according to claim 1, characterized in that: The inlet end (21) of the air hole (2) is provided with a threaded quick connector; the quick connector is matched with the air pipe connector.

3. The segmented guide bearing clearance measuring device according to claim 2, characterized in that: The quick connector is provided with a seal at its threaded part; the seal is made of nitrile rubber or fluororubber.

4. The segmented guide bearing clearance measuring device according to claim 1, characterized in that: The outlet end (22) of the air hole (2) is provided with a nozzle; the edge of the nozzle is rounded and flush with the surface of the guide shaft bearing (1).

5. The segmented guide bearing clearance measuring device according to claim 1, characterized in that: The gas meter (3) is connected to the gas port (2) via a flow sensor or a pressure sensor.

6. The segmented guide bearing clearance measuring device according to claim 1, characterized in that: The diameter of the pores (2) is 0.1 to 5 mm.

7. A segmented guide bearing clearance measurement system, characterized in that: It includes a control device, a gas-electric meter (3), and a plurality of guide bearings (1) as described in any one of claims 1 to 6; the guide bearings (1) are connected to the gas-electric meter (3) via a gas pipe; the control device is electrically connected to the gas-electric meter (3).

8. The segmented guide bearing clearance measurement system according to claim 7, characterized in that: The control device includes a control unit, a data unit, and a display unit; the control unit is used to control the start and stop of the gas-electric meter (3) channel; the data unit is used to collect, process, and store data; and the display unit is used to display the results.

9. A method for measuring the clearance of a segmented guide bearing, characterized in that: The method of measuring the gap between the guide bearing bush (1) and the bearing collar (4) using the segmented guide bearing gap measuring system as described in claim 8 includes the following steps: S1: Calibrate the gas-electric meter (3), connect the channel of the gas-electric meter (3) to the air hole of the standard gap block through the air tube, start the gas-electric meter (3), calibrate the zero point and range of the channel of the gas-electric meter (3), and establish the airflow-gap reference curve. S2: Install the gas power meter (3), and connect the gas power meter (3) channel to the inlet end (21) of each guide bearing (1) in the corresponding segmented guide bearing through the gas pipe; S3: Start the measurement, turn on the gas source, and input constant pressure gas into the air hole (2) through the air pipe. The system enters a stable operating state, and the gas flow rate in the air hole (2) of each guide bearing (1) is measured to obtain the gap value between each guide bearing (1) and the shaft collar (4). S4: Results Analysis.

10. The method for measuring the clearance of a segmented guide bearing according to claim 9, characterized in that: In step S1, the gap value of the standard gap block is the design gap value between the guide bush (1) and the shaft collar (4).

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