A bearing shell and a method of manufacture, a method of testing and a bearing assembly

Abstract

The application discloses a bearing bush, a preparation method, a testing method and a bearing assembly. The bearing bush is applied to the bearing assembly. The bearing assembly comprises a rotating shaft. The bearing assembly is arranged along the circumference of the rotating shaft. The application is characterized in that a pressure introduction hole is arranged on the first side of the bearing bush close to the rotating shaft, and a pressure sensor is arranged on the second side of the bearing bush away from the rotating shaft. The pressure sensor can detect the pressure of the oil film layer near the pressure introduction hole through the pressure introduction hole. Thus, the performance and the running state of the bearing assembly can be detected. The bearing bush can be optimized according to the detection result, so that the safety and stability of the bearing assembly in operation are improved.

Description

Technical Field

[0001] This application relates to the field of bearing pressure testing technology, and in particular to a bearing, its preparation method, testing method, and bearing assembly. Background Technology

[0002] Bearing assemblies typically include bearing bushes, which generally consist of thrust bearing bushes and guide bearing bushes. The surface of the thrust bearing bush is perpendicular to the guide shaft, while the surface of the guide bearing bush is parallel to the guide shaft. Currently, guide bearing bushes are usually mounted on the sliding rotor of the guide shaft, and an oil film is provided between the guide bearing bush and the sliding rotor.

[0003] However, the uniformity of the oil film pressure field directly affects the bearing's stiffness, load-bearing capacity, and rotational accuracy. After the bearing assembly is assembled, the oil film pressure field is prone to sudden drops, uneven distribution, or asymmetry, leading to pressure fluctuations in the bearing assembly. This makes it difficult to ensure the stability of the bearing assembly's rotational accuracy and may even cause a deterioration in the bearing's load-bearing performance. Currently, related technologies cannot accurately detect the oil film pressure field outside the bearing bush, thus affecting the safety and stability of the bearing assembly and the unit's operation.

[0004] Therefore, improving the safety and stability of bearing assemblies and unit operation is an urgent problem to be solved. Summary of the Invention

[0005] This application aims to provide a bearing bush, its manufacturing method, testing method, and bearing assembly to address the issue of how to improve the safety and stability of bearing assembly operation.

[0006] The present application adopts the following solution to solve the above-mentioned technical problems.

[0007] In a first aspect, this application provides a bearing bush for use in a bearing assembly, the bearing assembly including a shaft, the bearing bush being disposed circumferentially along the shaft and having a first side surface near the shaft, the first side surface being disposed of an oil film layer;

[0008] The bearing bush also has a second side opposite to the first side, and a pressure sensor is provided on the second side. A pressure-guiding hole is provided on the first side to connect the pressure sensor and the oil film layer, so that the pressure sensor can detect the pressure of the oil film layer.

[0009] The pressure-guiding holes are multiple in number, and each pressure-guiding hole is provided with a pressure sensor on the side away from the first side. The multiple pressure-guiding holes are distributed at high-pressure points on the first side and at secondary high-pressure points spaced around the high-pressure points. The pressure at the high-pressure points is greater than the average pressure on the first side and the pressure at the secondary high-pressure points.

[0010] In some embodiments of this application, a first groove is provided on the second side, the bottom of the first groove is connected to the pressure hole, and the pressure sensor is disposed in the first groove.

[0011] In some embodiments of this application, the pressure-guiding hole is used to guide the oil film layer into the pressure-guiding hole so that the oil film layer is connected to the pressure sensor.

[0012] In some embodiments of this application, the pressure sensor is fixed to the bottom of the tank, and a sealing structure is provided between the pressure sensor and the bottom of the tank.

[0013] Secondly, this application also provides a bearing assembly, the bearing assembly including a rotating shaft and the aforementioned bearing bush, a sliding rotor being disposed on the rotating shaft, and an oil film layer being disposed between the bearing bush and the sliding rotor.

[0014] In some embodiments of this application, the number of bearing bushes is multiple, and the multiple bearing bushes are distributed at circumferential intervals along the sliding rotor.

[0015] Thirdly, this application also provides a method for manufacturing a bearing bush, comprising:

[0016] A bearing substrate is provided, and the pressure distribution matrix on its first side is obtained when the bearing substrate is in a preset simulated pressure environment;

[0017] According to the pressure distribution matrix, high-pressure points and multiple secondary high-pressure points are marked on the first side; wherein, the pressure at the high-pressure points is greater than the average pressure on the first side and the pressure at the secondary high-pressure points.

[0018] Pressure-inducing holes are provided at the high-voltage point and the secondary high-voltage point on the first side, and the pressure-inducing holes are connected to the second side, which is located opposite to the first side.

[0019] A pressure sensor is provided on the second side, and an oil film layer is provided on the first side. The pressure sensor and the oil film layer are connected through the pressure-sensing hole.

[0020] In some embodiments of this application, providing a bearing substrate and obtaining a pressure distribution matrix on a first side surface of the bearing substrate includes:

[0021] Establish a coordinate system and project the first side surface of the bearing substrate onto the coordinate system to obtain a projection plane;

[0022] The projection plane is divided into N×N sub-squares to obtain an N×N first matrix; where N is a positive integer;

[0023] The average pressure of each sub-square is obtained when the bearing substrate is under the preset simulated pressure environment, and the second matrix is ​​obtained by combining the first matrix. The second matrix is ​​a pressure distribution matrix.

[0024] The area of ​​each sub-square is obtained and combined with the second matrix to obtain the third matrix, which is the pressure distribution matrix.

[0025] In some embodiments of this application, marking high-pressure points and a plurality of secondary high-pressure points spaced around the high-pressure points on a first side according to the pressure distribution matrix includes:

[0026] A pressure contour map is drawn based on the pressure distribution matrix, wherein the pressure contour map has multiple contour lines, and the pressure corresponding to each contour line is equal;

[0027] Mark the high-pressure points on the highest pressure contour line, which is the contour line corresponding to the highest pressure.

[0028] Fourthly, this application also provides a bearing test method, applied to the aforementioned bearing; the bearing test method includes:

[0029] Pressure signals from the high-pressure point and the secondary high-pressure point are acquired using pressure sensors, and the highest pressure value is selected from the acquired pressure signals as the maximum pressure value F. max ;

[0030] Obtain the preset average pressure value of the first side. Calculate the ratio M1 of the highest pressure value to the average pressure value;

[0031] Obtain a first threshold range and compare the ratio M1 with the first threshold range. If the ratio M1 falls within the first threshold range, the bearing is determined to meet the requirements; if the ratio M1 is not within the first threshold range, the bearing is determined to not meet the requirements.

[0032] This application provides a bearing bush, its manufacturing method, testing method, and bearing assembly. The bearing bush is used in a bearing assembly, which includes a rotating shaft and extends circumferentially along the shaft. This application provides a pressure-sensing hole on a first side of the bearing bush near the rotating shaft and a pressure sensor on a second side away from the rotating shaft. The pressure sensor can detect the pressure of the oil film layer near the pressure-sensing hole, thereby detecting the performance and operating status of the bearing assembly. Based on the detection results, the bearing bush can be optimized to improve the safety and stability of the bearing assembly operation. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of a bearing bush provided in one embodiment of this application;

[0035] Figure 2 For the purposes of this application Figure 1 A magnified schematic diagram of part A;

[0036] Figure 3 A schematic diagram illustrating the steps of a bearing fabrication method according to an embodiment of this application;

[0037] Figure 4 A schematic diagram of the steps in a bearing fabrication method provided in another embodiment of this application;

[0038] Figure 5 A schematic diagram illustrating the steps of a bearing fabrication method provided in another embodiment of this application;

[0039] Figure 6 A schematic diagram illustrating the steps of a bearing testing method provided in an embodiment of this application;

[0040] Figure 7 A schematic diagram of the bearing structure provided for another embodiment of this application.

[0041] Explanation of key component symbols:

[0042] 100-Bearing bush, 110-First side surface, 120-Second side surface, 121-First groove, 130-Pressure sensor, 131-Sealing structure, 140-Pressure inlet hole, 141-First hole section, 142-Second hole section, 200-Oil film layer. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0044] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will find that this application can be implemented without using these specific details. In other embodiments, known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles disclosed in this application.

[0045] Large rotating machinery such as hydro-generators, centrifugal pumps, steam turbines, and compressors are increasingly becoming larger and faster, making their reliability and safety crucial. Bearing assemblies and bearing bushes directly impact the reliability and safety of these units.

[0046] Current bearing assemblies consist of a shaft and bearing bushes, with the bearing bushes extending circumferentially along the shaft. For example, in a hydroelectric generator unit, the bearing assembly is subjected to radial mechanical imbalance forces, electromagnetic imbalance forces, and hydraulic imbalance forces from the rotating parts, causing the rotating components of the unit to oscillate within a set range. During actual operation, the bearing bushes can oscillate around a fulcrum in the circumferential direction of the shaft to change the wedge angle formed with the journal surface, thus adapting to different operating conditions. However, during this oscillation, the pressure on the bearing bush surface changes, causing a change in the pressure field of the surface oil film. This directly affects the pressure, rotational accuracy stability, and load-bearing capacity of the bearing assembly, thereby impacting the operational stability and reliability of the unit.

[0047] Based on this, this application improves the current bearing bush 100, its manufacturing method, testing method, and bearing assembly.

[0048] First, please refer to Figure 1 , Figure 1A schematic diagram of the bearing bush 100 provided in this embodiment is shown. The bearing bush 100 of this embodiment is used in a bearing assembly, which includes a rotating shaft. The bearing bush 100 extends circumferentially along the rotating shaft and has a first side surface 110 near the rotating shaft. An oil film layer 200 is disposed on the first side surface 110. It is understood that the first side surface 110 of the bearing bush 100 is configured with an arc-shaped structure to cooperate with a sliding rotor on the rotating shaft.

[0049] The bearing bush 100 has a second side 120 disposed opposite to the first side 110, and a pressure sensor 130 is disposed on the second side 120. A pressure-sensing hole 140 is formed on the first side 110, communicating with the second side 120 to connect the pressure sensor 130 and the oil film layer 200, so that the pressure sensor 130 can detect the pressure of the oil film layer 200. In other words, the pressure sensor 130 and the oil film layer 200 are located on opposite sides of the bearing bush 100.

[0050] In some embodiments, the pressure of the oil film layer 200 can be directly detected by extending the pressure probe of the pressure sensor 130 to the edge of the hole on the other side of the pressure tapping hole 140.

[0051] In another embodiment, the pressure tapping hole 140 is used to guide the oil film layer 200 into the pressure tapping hole 140 so that the oil film layer 200 is connected to the pressure sensor 130. That is, the pressure tapping hole 140 guides a portion of the liquid in the oil film layer 200 to the pressure measuring probe of the pressure sensor 130 to realize the detection of the pressure of the oil film layer 200.

[0052] The system includes multiple pressure-sensing holes 140, each with a pressure sensor 130 located on the side opposite to the first side 110. This means there is a one-to-one correspondence between the pressure sensor 130, the pressure-sensing hole 140, and the high-pressure point. Furthermore, the pressure-sensing holes 140 are distributed across the high-pressure points on the first side 110 and spaced out around the secondary high-pressure points. The pressure at the high-pressure points is greater than the average pressure on the first side 110 and the average pressure at the secondary high-pressure points. This facilitates real-time pressure monitoring of the high-pressure points on the first side 110, enabling monitoring of the performance of the bearing bush 100 and bearing assembly, thereby improving the stability and reliability of the bearing assembly and the unit.

[0053] It should be noted that the high-pressure points in this application are not randomly arranged, nor are they arranged in a regular pattern. Instead, they are selected from the pressure contour map on the first side 110, and the pressure contour line with the highest pressure is arranged on that pressure contour line.

[0054] The current bearing bush 100 structure does not include a pressure sensor 130, therefore it cannot detect the pressure on the surface of the bearing bush 100 in real time. The reliability of the bearing bush 100 and bearing assembly can only be determined by calculating the results using empirical formulas based on fixed parameters such as the bearing bush 100's structure and rotational speed, which is inaccurate. However, in this application, a pressure-sensing hole 140 is opened on the first side 110 of the bearing bush 100 near the rotating shaft, and a pressure sensor 130 is installed on the second side 120 away from the rotating shaft. The pressure sensor 130 can detect the pressure of the oil film layer 200 near the pressure-sensing hole 140 through the pressure-sensing hole 140, thereby detecting the performance and operating status of the bearing assembly. Based on the detection results, the bearing bush 100 can be optimized to improve the safety and stability of the bearing assembly operation.

[0055] In some embodiments of this application, please refer to Figure 2 , Figure 2 It shows Figure 1 The enlarged schematic diagram of part A shows that a first groove 121 is provided on the second side 120 of this embodiment. The bottom of the first groove 121 is connected to the pressure hole 140, and the pressure sensor 130 is disposed in the first groove 121. This is beneficial to improve space utilization and reduce the space occupied by the bearing bush 100 and the bearing assembly.

[0056] In some embodiments, please continue reading Figure 2 The dimension of the first groove 121 in the first direction is larger than the dimension of the pressure hole 140 in the first direction, and the first direction is the radial direction of the pressure hole 140.

[0057] In some embodiments, please continue reading Figure 2 The first pressure-guiding hole 140 has a first hole segment 141 and a second hole segment 142 arranged along a second direction, which is the direction from the first side surface 110 to the second side surface 120. The diameter of the first hole segment 141 is smaller than the diameter of the second hole segment 142, which is beneficial to improving the drainage performance of the pressure-guiding hole 140.

[0058] Please refer to the embodiments described in this application. Figure 2 The pressure sensor 130 is fixed to the bottom of the tank, and a sealing structure 131 is provided between the pressure sensor 130 and the bottom of the tank. The sealing structure 131 can prevent the oil film layer 200 from leaking to the second side 120, which is beneficial to improving the utilization rate of the oil film layer 200.

[0059] In another embodiment of this application, please refer to Figure 7In this embodiment, the bearing bush 100 has a third side surface disposed between the first side surface 110 and the second side surface 120. That is, one side of the third side surface intersects with the first side surface 110, and the other side intersects with the second side surface 120. A second groove is formed on the third side surface, which connects to the pressure-feeding hole 140, and a pressure sensor 130 is disposed within the second groove. In other words, the bearing bush 100 structure of the aforementioned embodiment can be selected to guide the oil film pressure oil to the back of the bearing bush 100, and the oil pressure is detected by the pressure sensor 130 in the first groove 121. Alternatively, the bearing bush 100 structure of this embodiment can be selected to guide the oil film pressure oil to the side of the bearing bush 100, and the oil pressure is detected by the pressure sensor 130 in the second groove.

[0060] Furthermore, in order to better implement the bearing bush 100 in the embodiments of this application, based on the bearing bush 100, this application also provides a bearing assembly, which includes a rotating shaft and the bearing bush 100 in any of the above embodiments. A sliding rotor is provided on the rotating shaft, the bearing bush 100 is arranged around the sliding rotor, and an oil film layer 200 is provided between the bearing bush 100 and the sliding rotor.

[0061] In one possible example, the sliding rotor is fitted onto the shaft. In another possible example, the sliding rotor is integrated into the shaft, forming a single, integral structure with it.

[0062] In some embodiments of this application, there are multiple bearing bushes 100, which are distributed at intervals along the circumference of the sliding rotor. It should be explained that the sliding rotor is generally an annular structure, directly fitted onto the rotating shaft. That is, the first side surface 110 of each bearing bush 100 is an arc-shaped structure, and this arc-shaped structure is adapted to the outer wall of the sliding rotor.

[0063] In another embodiment, there are multiple bearing bushes 100, which are distributed on the outer wall of the sliding rotor and spliced ​​together to form a ring structure. In yet another embodiment, the bearing bushes 100 are configured as a ring structure and are directly fitted onto the outer wall of the sliding rotor.

[0064] Furthermore, to better implement the bearing 100 in the embodiments of this application, based on the bearing 100, this application also provides a method for manufacturing the bearing 100, which can be applied to the bearing 100 in any of the above embodiments. Please refer to... Figure 3 , Figure 3 This illustration shows a schematic diagram of the steps in the method for manufacturing the bearing bush 100 provided in this embodiment; the method for manufacturing the bearing bush 100 in this embodiment includes:

[0065] S100: Provide a bearing substrate and obtain the pressure distribution matrix on its first side surface 110 when the bearing substrate is in a preset simulated pressure environment. Specifically, the bearing substrate can be understood as the bearing 100 structure in the prior art, that is, the bearing 100 structure without pressure-guiding holes 140 and without pressure sensors 130. In this embodiment, the bearing 100 structure in the prior art can be directly obtained as the bearing substrate, or the bearing substrate can be processed using known processes. It should be explained that the pressure distribution matrix is ​​an N×N matrix, where each point represents a finite element cell on the first side surface 110, and the matrix represents the pressure value corresponding to all finite element cells on the first side surface 110. In some embodiments, the pressure distribution matrix can be estimated from fixed parameters such as the bearing 100 structure dimensions, rotational speed, and environmental parameters of the simulated pressure environment, or it can be obtained from computer simulation experiments.

[0066] S200: Based on the pressure distribution matrix, high-pressure points and multiple secondary high-pressure points spaced around the high-pressure points are marked on the first side 110. The pressure at the high-pressure points is greater than the average pressure on the first side 110 and the pressure at the secondary high-pressure points. Specifically, the high-pressure points correspond to finite element cells with higher pressure values. The average pressure on the first side 110 can be understood as the sum of all values ​​in the pressure distribution matrix divided by the number of finite element cells. In some embodiments, the number of high-pressure points is one, and the secondary high-pressure points can be directly selected from 7-15 finite element cells surrounding the high-pressure points. More specifically, eight finite element cells are selected for the secondary high-pressure points.

[0067] S300: A pressure tap 140 is provided at the high-pressure point on the first side 110, and the pressure tap 140 is connected to the second side 120, which is located opposite to the first side 110. Specifically, the pressure tap 140 is a through hole that passes directly from the first side 110 to the second side 120.

[0068] S400: A pressure sensor 130 is provided on the second side 120, and an oil film layer 200 is provided on the first side 110. The pressure sensor 130 and the oil film layer 200 are connected through a pressure tapping hole 140. Specifically, the pressure sensor 130 can measure the pressure of the oil film layer 200 through the pressure tapping hole 140.

[0069] In some embodiments of this application, please refer to Figure 4 , Figure 4 This diagram illustrates the steps of the bearing 100 manufacturing method provided in this embodiment; step S100 of this embodiment includes:

[0070] S110: Establish a coordinate system and project the first side surface 110 of the bearing substrate 100 onto the coordinate system to obtain the projection plane. Specifically, if the bearing substrate is a planar structure, a rectangular coordinate system can be selected; if the bearing substrate is a fan-shaped arc surface structure, a polar coordinate system can be selected.

[0071] S120: Divide the projection plane into N×N sub-squares to obtain an N×N first matrix; where N is a positive integer. It should be noted that the larger the value of N, the more accurate the final pressure distribution matrix.

[0072] S130: Obtain the average pressure of each sub-square when the bearing substrate is under the preset simulated pressure environment, and combine it with the first matrix to obtain the second matrix, which is a pressure distribution matrix. Specifically, the average pressure of the sub-square is the average pressure of the four corner points of the square; and the pressure at the boundary of the projection plane is 0. It can be understood that the second matrix is ​​a (N-1)×(N-1) pressure distribution matrix. More specifically, the average pressure of the sub-square can be estimated from fixed parameters such as the structural dimensions of the bearing 100, the rotational speed, and the environmental parameters of the simulated pressure environment, or it can be obtained from computer simulation experiments.

[0073] S140: Obtain the area of ​​each sub-square and combine it with the second matrix to obtain the third matrix, which is the pressure distribution matrix. Specifically, the area of ​​each sub-square is Δs, and multiplying the area of ​​the sub-square by the second matrix yields the third matrix. The specific formula is as follows:

[0074] Where P11 is the average pressure of the first sub-square in the first row and first column, and similarly P (n-1)(n-1) F11 is the average pressure of the sub-square in the (N-1)th row and (N-1)th column, and F11 is the compressive force value of the sub-square in the first row and first column. (n-1)(n-1) This represents the pressure value of the sub-square in row N-1 and column N-1.

[0075] More specifically, the force F on the first side 110 of bearing 100 can be obtained by summing the third matrix. The specific formula is as follows:

[0076] In some embodiments of this application, please refer to Figure 5 , Figure 5 This diagram illustrates the steps of the bearing 100 manufacturing method provided in this embodiment. Step S200 of this embodiment includes:

[0077] S210: A pressure contour map is drawn based on the pressure distribution matrix. The pressure contour map has multiple contour lines, each corresponding to an equal pressure. Specifically, the pressure distribution matrix forms a grid of pressure points on the first side surface 110. Connecting pressure points with the same pressure value forms pressure contour lines, and multiple pressure contour lines form a pressure contour map. It should be noted that, for the bearing bush 100 in this embodiment, the pressure gradually decreases from its center to its boundary.

[0078] S220: Mark high-pressure points on the highest-pressure contour line, which corresponds to the contour line with the highest pressure. Specifically, the highest-pressure contour line is formed by connecting the pressure points with the highest pressure value. All high-pressure points can be marked on the highest-pressure contour line; or some can be marked on the highest-pressure contour line, and the remaining high-pressure points can be marked on the second-highest-pressure contour line. Furthermore, second-highest-pressure points can also be marked on the second-highest-pressure contour line.

[0079] Furthermore, to better implement the bearing 100 in the embodiments of this application, based on the bearing 100, this application also provides a bearing 100 testing method, applied to the bearing 100 in any of the above embodiments. Please refer to... Figure 6 , Figure 6 This diagram illustrates the steps of the bearing bush 100 testing method provided in this embodiment. The bearing bush 100 testing method of this embodiment includes:

[0080] S500: Acquires pressure signals from the high-pressure point and the sub-high-pressure point via pressure sensor 130, and selects the value with the largest pressure signal from the acquired pressure signals as the maximum applied pressure value F. max In other words, the pressure sensor 130 on the bearing bush 100 can acquire pressure data on the bearing bush 100. Specifically, multiple pressure sensors 130 acquire pressure signals at each high-pressure point and the next high-pressure point, obtaining multiple pressure values. The highest value among these multiple pressure values ​​is selected as the highest pressure value F. max .

[0081] S600: Obtain the preset average pressure value of the first side 110. Calculate the ratio M1 between the highest applied pressure value and the average applied pressure value. Specifically, the average applied pressure value... It can be calculated using empirical formulas. More specifically, the average compressive pressure value. It can be estimated by combining fixed parameters such as the structural dimensions and rotational speed of the bearing bush 100 with empirical formulas, or it can be obtained through computer simulation experiments.

[0082] S700: Obtain the first threshold range and compare the ratio M1 with the first threshold range. If the ratio M1 falls within the first threshold range, the bearing bush 100 is determined to meet the requirements; if the ratio M1 is not within the first threshold range, the bearing bush 100 is determined to not meet the requirements. It should be explained that by comparing the ratio M1 with the first threshold range, it can be determined whether the bearing bush 100 and the bearing assembly meet the requirements, that is, to determine the performance quality of the bearing bush 100 and the bearing assembly.

[0083] In some embodiments, the first threshold range can be 1-4.

[0084] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0085] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0086] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0087] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0088] Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, the numerical parameters should take into account a specified number of significant digits and employ a general method of digit preservation. Although the numerical ranges and parameters used to confirm their breadth of application in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0089] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0090] The technical solutions provided by the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A bearing bush used in a bearing assembly, characterized in that, The bearing assembly includes a shaft, the bearing bush being disposed circumferentially along the shaft and having a first side surface near the shaft, on which an oil film layer is disposed; The bearing bush also has a second side opposite to the first side, and a pressure sensor is provided on the second side. A pressure-guiding hole is provided on the first side to connect the pressure sensor and the oil film layer, so that the pressure sensor can detect the pressure of the oil film layer. The pressure-guiding holes are multiple in number, and each pressure-guiding hole is provided with a pressure sensor on the side away from the first side. The multiple pressure-guiding holes are distributed at high-pressure points on the first side and at secondary high-pressure points spaced around the high-pressure points. The pressure at the high-pressure points is greater than the average pressure on the first side and the pressure at the secondary high-pressure points. The pressure-guiding hole has a first hole segment and a second hole segment arranged along a second direction, the second direction being the direction from the first side to the second side, and the diameter of the first hole segment is smaller than the diameter of the second hole segment.

2. The bearing bush according to claim 1, characterized in that, A first groove is provided on the second side, the bottom of the first groove is connected to the pressure hole, and the pressure sensor is disposed in the first groove.

3. The bearing bush according to claim 2, characterized in that, The pressure-guiding hole is used to guide the oil film layer into the pressure-guiding hole so that the oil film layer is connected to the pressure sensor.

4. The bearing bush according to claim 2, characterized in that, The pressure sensor is fixed to the bottom of the tank, and a sealing structure is provided between the pressure sensor and the bottom of the tank.

5. A bearing assembly, characterized in that, The bearing assembly includes a rotating shaft and a bearing bush as described in any one of claims 1 to 4, wherein a sliding rotor is disposed on the rotating shaft, and an oil film layer is disposed between the bearing bush and the sliding rotor.

6. The bearing assembly according to claim 5, characterized in that, The number of bearing bushes is multiple, and the multiple bearing bushes are distributed at intervals along the circumference of the sliding rotor.

7. A method for manufacturing bearing bushes, characterized in that, include: A bearing substrate is provided, and the pressure distribution matrix on its first side is obtained when the bearing substrate is in a preset simulated pressure environment; According to the pressure distribution matrix, high-pressure points and multiple secondary high-pressure points are marked on the first side surface at intervals around the high-pressure points; wherein, the pressure at the high-pressure points is greater than the average pressure on the first side surface and the pressure at the secondary high-pressure points. Pressure-inducing holes are provided at the high-voltage point and the secondary high-voltage point on the first side, and the pressure-inducing holes are connected to the second side, which is located opposite to the first side. A pressure sensor is provided on the second side, and an oil film layer is provided on the first side, with the pressure sensor and the oil film layer connected through the pressure-sensing hole.

8. The bearing manufacturing method according to claim 7, characterized in that, The provision of a bearing substrate and the acquisition of a pressure distribution matrix on a first side surface of the bearing substrate include: Establish a coordinate system and project the first side surface of the bearing substrate onto the coordinate system to obtain a projection plane; The projection plane is divided into N×N sub-squares to obtain an N×N first matrix; where N is a positive integer; The average pressure of each sub-square is obtained when the bearing substrate is under the preset simulated pressure environment, and the second matrix is ​​obtained by combining the first matrix. The second matrix is ​​a pressure distribution matrix. The area of ​​each sub-square is obtained and combined with the second matrix to obtain the third matrix, which is the pressure distribution matrix.

9. The bearing manufacturing method according to claim 7, characterized in that, The step of marking high-pressure points and multiple secondary high-pressure points spaced around the high-pressure points on the first side according to the pressure distribution matrix includes: A pressure contour map is drawn based on the pressure distribution matrix, wherein the pressure contour map has multiple contour lines, and the pressure corresponding to each contour line is equal; Mark the high-pressure points on the highest pressure contour line, which is the contour line corresponding to the highest pressure.

10. A method for testing bearing bushes, characterized in that, Applied to the bearing bush as described in any one of claims 1 to 4; the bearing bush testing method includes: The pressure sensor acquires pressure signals from the high-pressure point and the secondary high-pressure point, and selects the highest pressure value from the acquired pressure signals as the maximum pressure value F. max ; Obtain the preset average pressure value of the first side. Calculate the ratio M1 between the highest pressure value and the average pressure value; Obtain a first threshold range and compare the ratio M1 with the first threshold range. If the ratio M1 falls within the first threshold range, the bearing is determined to meet the requirements; if the ratio M1 is not within the first threshold range, the bearing is determined to not meet the requirements.

Images