Thrust pad scraping method and thrust pad

Abstract

The thrust pad scraping method comprises the following steps that S1, a scraping platform is prepared, the thrust pad is placed on the scraping platform in the posture that the to-be-scraped face faces the scraping platform, the thrust pad is rotated so that the to-be-scraped face of the thrust pad can rub with the scraping platform, and the to-be-scraped face of the thrust pad is scraped on the scraping platform; then checking and confirming a high point part of a to-be-scraped surface of the thrust pad; s2, scraping the high point part of the thrust pad by using a scraper according to a tool path sequence, wherein the tool path sequence at least comprises a vertical tool path, a transverse tool path, a left 45-degree tool path and a right 45-degree tool path. According to the scraping method of the thrust pad, uniform grooves can be formed in the to-be-scraped surface of the thrust pad, the grooves are similar to'oil pancake ', it can be guaranteed that oil is stored in the to-be-scraped surface of the thrust pad, and the service life of the thrust pad is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of thrust bearing processing, and in particular to a thrust bearing scraping method and a thrust bearing. Background Art

[0002] The reactor coolant pump (main pump for short) is part of the pressure boundary of a pressurized water reactor nuclear power plant. Under normal circumstances, the function of the main pump is to increase the coolant pressure, compensate for the pressure loss of the system, provide sufficient cooling flow for the reactor core and ensure the circulation of the reactor coolant. Under accident conditions, the inertial idling of the main pump unit is used to remove the residual heat of the core and ensure the safety of the reactor. The reliability and safety of the main pump motor bearings are particularly important.

[0003] At present, the thrust bearings of most models of main pump motors in China have not been scraped and ground, which makes the thrust bearings of the main pump motors unable to store a certain amount of sealing oil. As a result, some main pumps have bearings burned due to high temperature during operation, which reduces the service life of the thrust bearings of the main pump motors. Summary of the invention

[0004] The present application provides a thrust bearing scraping method, comprising the following steps:

[0005] S1: preparing a scraping platform, placing a thrust washer on the scraping platform with the surface to be scraped facing the scraping platform, rotating the thrust washer so that the surface to be scraped rubs against the scraping platform, and then checking and confirming the high point of the surface to be scraped of the thrust washer;

[0006] S2: Use a scraper to scrape the high point of the thrust washer in a sequence of tool paths, wherein the sequence of tool paths at least includes: a vertical tool path, a transverse tool path, a left 45° tool path, and a right 45° tool path.

[0007] In some embodiments, in the step S2, the length of the scratch made by the scraper each time is 11-16 mm, the width of the scratch is 3-5 mm, and the depth of the scratch is 0.01-0.02 mm.

[0008] In some embodiments, after the step S2, the thrust shoe scraping method further comprises:

[0009] S3: Check whether the high point of the thrust washer is evenly scraped and ground. If the high point of the thrust washer is not evenly scraped and ground, repeat the steps S2 and S3 until the high point of the thrust washer is evenly scraped and ground.

[0010] In some embodiments, the step of checking whether the high point of the thrust washer is evenly scraped comprises:

[0011] Place the abrasive paste on the scraping platform, and then place the thrust washer on the abrasive paste with the surface to be scraped facing the scraping platform, and rotate the thrust washer so that the surface to be scraped rubs against the abrasive paste, and then check whether the high point of the thrust washer is scraped evenly.

[0012] In some embodiments, before the step S1, the thrust shoe scraping method further includes:

[0013] S0: Check whether the flatness of the thrust washer meets the requirements. If the flatness of the thrust washer meets the requirements, proceed to step S1; if the flatness of the thrust washer does not meet the requirements, process the thrust washer and repeat step S0 until the flatness of the thrust washer meets the requirements, and then proceed to step S1.

[0014] In some embodiments, checking whether the flatness of the thrust pad meets the requirements includes:

[0015] S01: Place the thrust washer on the scraping platform with the surface to be scraped facing the scraping platform, and then use a micrometer to measure the first height values ​​of 2n measuring points symmetrically on the back side of the thrust washer away from the surface to be scraped to the table top of the scraping platform, where n is a positive integer and n≥2; compare the difference between the first height values ​​of any two measuring points with a preset value to determine whether the flatness of the thrust washer meets the requirements.

[0016] In some embodiments, after step S01, checking whether the flatness of the thrust pad meets the requirements further includes:

[0017] S02: Provide a contour block with the same thickness as the stop position of the thrust washer surface to be scraped, place the contour block on the scraping platform and next to the thrust washer, zero the micrometer with the contour block as a reference, and then measure the second height value from each measuring point to the table surface of the scraping platform with the zeroed micrometer, and then compare the difference between the second height values ​​of any two measuring points with the preset value to determine again whether the flatness of the thrust washer meets the requirements.

[0018] In some embodiments, n=2, four measuring points are located in the inner bottom surface of the mounting groove on the back side of the thrust washer, and the four measuring points include a first measuring point, a second measuring point, a third measuring point, and a fourth measuring point that are spaced apart on the same circumference; wherein the first measuring point and the third measuring point are arranged opposite to each other, the second measuring point and the fourth measuring point are arranged opposite to each other, and the line connecting the first measuring point and the third measuring point is a first line, the line connecting the second measuring point and the fourth measuring point is a second line, and the first line and the second line are perpendicular to each other.

[0019] In some embodiments, after the step S3, the thrust shoe scraping method further comprises:

[0020] S4: Check whether the flatness of the thrust washer meets the requirements. If the flatness of the thrust washer meets the requirements, the scraping is qualified; if the flatness of the thrust washer does not meet the requirements, the scraping is unqualified, and step S3 is repeated.

[0021] The implementation of this application has the following beneficial effects: through the thrust washer scraping method, a uniform groove can be formed on the surface to be scraped of the thrust washer. The function of the groove is similar to that of "oil naan", which can ensure that the surface to be scraped of the thrust washer is always supplied with oil, and it is not easy to burn the washer, which can effectively extend the service life of the thrust washer.

[0022] The present application also discloses a thrust washer, which includes a surface to be scraped and a back surface facing each other. The surface to be scraped of the thrust washer is provided with a groove, and the groove is scraped by the thrust washer scraping method described in any of the above embodiments.

[0023] The implementation of this application has the following beneficial effects: after the thrust washer's surface to be scraped is scraped, uniform grooves are formed on the surface, which functions like "oil naan", ensuring that the thrust washer's surface to be scraped has oil stored at any time, making it less likely for the thrust washer to burn, and effectively extending the service life of the thrust washer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present application, the present application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 is a flow chart of a thrust pad scraping method in some embodiments of the present application;

[0026] Figure 2 is a cross-sectional view of a thrust pad in some embodiments of the present application;

[0027] Figure 3 is a back view of a thrust pad in some embodiments of the present application;

[0028] Figure 4 is a schematic diagram of the surface to be scraped of the thrust pad in some embodiments of the present application;

[0029] Figure 5 It is a schematic diagram of the scraping tool path in some embodiments of the present application. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present application.

[0031] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0033] See also Figure 1 The present application shows a thrust bearing scraping method to form a uniform groove structure on a to-be-scraped surface 11 of a thrust bearing 10, wherein the thrust bearing 10 includes but is not limited to a thrust bearing of a main pump motor. The thrust bearing scraping method comprises the following steps:

[0034] S1: Prepare a scraping platform, place the thrust washer 10 on the scraping platform with the surface 11 to be scraped facing the scraping platform, and rotate the thrust washer 10 so that the surface 11 to be scraped rubs against the scraping platform, and then check and confirm the high point of the surface 11 to be scraped of the thrust washer 10.

[0035] In step S1, the scraping platform can be but is not limited to a precision marble platform, and the precision marble platform is leveled within a preset value (such as 1.5um) to ensure the flatness of the scraping platform, and to ensure sufficient light to ensure the friction effect between the scraping surface 11 and the scraping platform. Preferably, the precision marble platform can be a DIN.076 / 0 grade black granite marble platform, with a density of 2.6-2.7kg / dm 3 , hardness 6 / 7Mohs, compressive strength ±220MPa.

[0036] It should be noted here that the surface to be scraped 11 of the thrust washer 10 generally refers to the bearing surface of the thrust washer 10 , that is, generally refers to the babbitt alloy surface of the thrust washer 10 .

[0037] The high point of the thrust washer 10 is also the bright spot of the thrust washer 10, which is formed by the friction between the surface 11 of the thrust washer 10 to be scraped and the scraping platform. The operator can then easily and quickly confirm the bright spot of the surface 11 to be scraped and confirm its high point by visual inspection. Figure 4 The high points may be four diagonal areas of the surface 11 to be scraped of the thrust washer 10, such as the first high point 111, the second high point 112, the second high point 113, the second high point 114, the fifth high point 111a, the sixth high point 112a, the seventh high point 113a, and the eighth high point 114a. In the specific scraping operation, the first high point 111, the second high point 112, the second high point 113, and the second high point 114 may be scraped first, and then the fifth high point 111a, the sixth high point 112a, the seventh high point 113a, and the eighth high point 114a may be scraped, and the entire surface 11 to be scraped of the thrust washer 10 may be scraped evenly from the outside to the inside.

[0038] S2: Use a scraper to scrape the high point of the thrust washer 10 in the order of tool paths, and the order of tool paths at least includes: vertical tool path, cross-cutting tool path, left 45° tool path, right 45° tool path (such as Figure 5 shown).

[0039] In the S2 step, a scraper is used to scrape the high point of the thrust washer 10 in the order of vertical path, cross-cutting path, left 45° path, and right 45° path, so that the surface 11 of the thrust washer 10 to be scraped forms grooves with good uniformity and smoothness. Then, oil can be stored in the grooves of the surface 11 of the thrust washer 10 to be scraped. In this way, during use, the surface 11 of the thrust washer 10 to be scraped has oil stored at any time, so that it is not easy to burn the washer, and the service life of the thrust washer can be effectively extended.

[0040] By means of the thrust washer scraping method, the thrust washer 10 is placed on the scraping platform with the surface 11 to be scraped facing the scraping platform, and the thrust washer 10 is rotated so that the surface 11 to be scraped of the thrust washer 10 rubs against the scraping platform, thereby facilitating the operator to confirm the bright spots of the surface 11 to be scraped by visual inspection and to confirm the high points of the surface 11 to be scraped conveniently and quickly, and then, the high points of the thrust washer 10 can be fully scraped with a scraper in the order of the tool paths, so that the surface 11 of the thrust washer 10 to be scraped can be formed into a groove with good uniformity and smoothness, and then, the groove can be used to store oil to play a role similar to "oil naan", thereby effectively ensuring that the surface 11 to be scraped of the thrust washer 10 is always fully stored with oil during use, and the washer is not prone to burning, thereby effectively extending the service life of the thrust washer. In nuclear power plants, the thrust bearing of the main pump motor can be refurbished according to the thrust bearing scraping method, which can effectively extend the service life of the thrust bearing of the main pump motor and save millions of yuan in the cost of purchasing new bearings.

[0041] In order to ensure sufficient friction between the scraping surface 11 and the scraping platform, the thrust washer 10 can be rotated in a circular alternating manner. The circular alternating manner can be that the operator presses the circumference of the thrust washer 10 with his left and right hands, and then rotates it in the direction of "clockwise-counterclockwise-clockwise" or "counterclockwise-clockwise-counterclockwise".

[0042] In some embodiments, in the step S2, the length of the scratch made by the scraper each time is 11-16 mm, the width of the scratch is 3-5 mm, and the depth of the scratch is 0.01-0.02 mm.

[0043] Based on this, the length of the scratch made by the scraper each time is set to 11-16mm, the width of the scratch is 3-5mm, and the depth of the scratch is 0.01-0.02mm, so as to ensure that grooves of appropriate size are formed by scraping to store an appropriate amount of oil, thereby further ensuring that the grooves on the surface 11 to be scraped of the thrust washer 10 are always filled with oil during use.

[0044] In order to fully understand the scraping condition of the high point of the thrust washer 10 and effectively ensure the scraping quality, in some embodiments, after the step S2, the thrust washer scraping method further includes:

[0045] S3: Check whether the high point of the thrust washer 10 is evenly scraped. If the high point of the thrust washer 10 is not evenly scraped, repeat the steps S2 and S3 until the high point of the thrust washer 10 is evenly scraped. If the high point of the thrust washer 10 is evenly scraped, end the scraping operation or continue to the step S4 described below.

[0046] In some embodiments, the step of checking whether the high point of the thrust washer 10 is evenly scraped comprises:

[0047] Place the abrasive paste on the scraping platform, and then place the thrust washer 10 on the abrasive paste with the surface 11 to be scraped facing the scraping platform, and rotate the thrust washer 10 to make the surface 11 to be scraped rub against the abrasive paste, and then check whether the high point of the thrust washer 10 is scraped evenly.

[0048] Among them, the use of abrasive paste can improve the smoothness of the surface 11 to be scraped and ground of the thrust washer 10, and also improve the corrosion resistance of the thrust washer 10. In this way, the operator can visually check whether the high points (bright spots) of the thrust washer 10 after grinding with the abrasive paste are evenly distributed, and can conveniently and quickly determine whether the high points of the thrust washer 10 are evenly scraped and ground. If the high points (bright spots) of the thrust washer 10 are evenly distributed, it means that the high points of the thrust washer 10 have been evenly scraped and ground. On the contrary, if the high points (bright spots) of the thrust washer 10 are unevenly distributed, it means that the high points of the thrust washer 10 have not been evenly scraped and ground.

[0049] Based on this, the thrust washer 10 is placed on the grinding paste with the surface 11 to be scraped facing the scraping platform, and after each scraping of the high point of the surface 11 of the thrust washer 10, the thrust washer 10 is rotated to make the surface 11 of the thrust washer 10 rub against the grinding paste, and then the thrust washer 10 is turned over to visually check whether the high point of the surface 11 of the thrust washer 10 to be scraped is evenly distributed. If the high point (bright spot) of the thrust washer 10 is evenly distributed, it means that the high point of the thrust washer 10 has been evenly scraped. On the contrary, if the high point (bright spot) of the thrust washer 10 is unevenly distributed, it means that the high point of the thrust washer 10 has not been evenly scraped. Therefore, it can be conveniently and quickly judged whether the high point of the thrust washer 10 is evenly scraped, and the detection method is convenient and efficient.

[0050] In order to ensure sufficient friction between the surface to be scraped 11 and the grinding paste, the thrust washer 10 may also be rotated in a circular alternating manner.

[0051] In order to further ensure the quality of the scraping operation, in some embodiments, before the step S1, the thrust shoe scraping method further includes:

[0052] S0: Check whether the flatness of the thrust washer 10 meets the requirements. If the flatness of the thrust washer 10 meets the requirements, proceed to step S1; if the flatness of the thrust washer 10 does not meet the requirements, process the thrust washer 10 and repeat step S0 until the flatness of the thrust washer 10 meets the requirements, and then proceed to step S1. If the flatness of the thrust washer 10 does not meet the requirements, the thrust washer 10 can be processed by a precision machine tool for flattening until the flatness of the thrust washer 10 meets the requirements.

[0053] In some embodiments, the step of checking whether the flatness of the thrust washer 10 meets the requirements includes:

[0054] S01: The thrust washer 10 is placed on the scraping platform with the surface 11 to be scraped facing the scraping platform, and then the first height values ​​of 2n measuring points symmetrically away from the back side 12 of the thrust washer 10 away from the surface 11 to be scraped are measured by a micrometer, where n is a positive integer and n≥2; by comparing the difference between the first height values ​​of any two measuring points with a preset value, it is determined whether the flatness of the thrust washer 10 meets the requirements. The preset value is set as required, for example, it can be 0.01mm, 0.02mm, 0.05mm, etc.

[0055] like Figure 3 As shown, in some embodiments, the measuring point may be located in the inner bottom surface of the mounting groove 13 of the back side 12 of the thrust washer 10, the mounting groove 13 is roughly a cylindrical groove, and each pair of measuring points may be symmetrically arranged based on the axis / axis center / circle center of the mounting groove 13. For example, the measuring points may be a first measuring point 20, a second measuring point 30, a third measuring point 40, and a fourth measuring point 50, wherein the first measuring point 20 may be symmetrically arranged with the third measuring point 40 based on the axis of the mounting groove 13, and the second measuring point 30 may be symmetrically arranged with the fourth measuring point 50 based on the axis of the mounting groove 13.

[0056] Among them, since 2n symmetrical measurement points are similar to n lines intersecting to determine a surface, therefore, taking 2n symmetrical measurement points can determine the flatness parameters of a surface (a certain area). The value of n can be 2, 3, 4, 5, 6, which can be selected according to actual needs. The larger the value of n, the higher the measurement accuracy.

[0057] Based on this, by placing the thrust washer 10 on the scraping platform with the surface 11 to be scraped facing the scraping platform, the operator can conveniently and quickly measure the first height value from 2n measuring points symmetrically away from the back side 12 of the surface 11 to be scraped of the thrust washer 10 to the table top of the scraping platform, and then calculate the difference (absolute value) of the height values ​​of any two measuring points. If the difference (absolute value) of the first height values ​​of any two measuring points does not exceed the preset value, it indicates whether the flatness of the thrust washer 10 meets the requirements. Otherwise, as long as the difference (absolute value) of the first height values ​​of two measuring points is greater than the preset value, it indicates that the flatness of the thrust washer 10 does not meet the requirements. The flatness detection method of the thrust washer 10 is simple and efficient.

[0058] In addition, each measuring point can be measured multiple times, for example, each measuring point can be measured three times, four times, five times or any other number of times, and then the data of each measuring point is averaged to obtain an average value, which can further reduce the measurement error.

[0059] like Figure 3 As shown, in some embodiments, n=2, four measuring points are located in the inner bottom surface of the mounting groove 13 of the back side 12 of the thrust pad 10, and the four measuring points include those located on the same circumference (such as Figure 3 As an example, a first measuring point 20, a second measuring point 30, a third measuring point 40, and a fourth measuring point 50 are spaced apart from each other; wherein, the first measuring point 20 and the third measuring point 40 are symmetrically arranged based on the axis of the mounting groove 13, the second measuring point 30 and the fourth measuring point 50 are symmetrically arranged based on the axis of the mounting groove 13, and the line connecting the first measuring point 20 and the third measuring point 40 is a first line, and the line connecting the second measuring point 30 and the fourth measuring point 50 is a second line, and the first line and the second line are perpendicular to each other.

[0060] In some embodiments, after step S01, checking whether the flatness of the thrust washer 10 meets the requirements further includes:

[0061] S02: Provide a contour block with the same thickness as the stop position of the surface 11 to be scraped of the thrust washer 10, place the contour block on the scraping platform and next to the thrust washer, zero the micrometer with the contour block as a reference, and then measure the second height value from each measuring point to the surface of the scraping platform with the zeroed micrometer, and then compare the difference between the second height values ​​of any two measuring points with the preset value to determine again whether the flatness of the thrust washer 10 meets the requirements.

[0062] Among them, the contour block serves as the standard value of the thickness of the thrust washer 10 and is used to zero the micrometer. That is, the reading of the micrometer when measuring the distance from the side of the contour block away from the scraping platform to the scraping platform is 0. In this way, when the second height value from each measuring point to the surface of the scraping platform is measured by the zeroed micrometer, the measurement accuracy is higher, which effectively reduces the measurement error.

[0063] Among them, in the embodiment of the present application, the contour blocks are selected to have the same or similar thickness as the stop position of the thrust washer 10, the number of the contour blocks can be one, two, three or any other number, and the material of the contour blocks can be babbitt alloy. It can be understood that the material, number and shape of the contour blocks can be selected and set according to actual needs, and there is no limitation here.

[0064] Specifically, the review step is the same as or similar to step S01, wherein a contour block is placed on the scraping platform and next to the thrust washer, the micrometer is zeroed based on the contour block, and then the second height value from 2n measuring points symmetrically away from the back side 12 of the surface 11 to be scraped of the thrust washer 10 to the table top of the scraping platform is measured by the zeroed micrometer, and then the difference (absolute value) of the second height values ​​of any two measuring points is calculated. If the difference (absolute value) of the second height values ​​of any two measuring points does not exceed the preset value, it indicates whether the flatness of the thrust washer 10 meets the requirements. Otherwise, as long as the difference (absolute value) of the second height values ​​of two measuring points is greater than the preset value, it indicates that the flatness of the thrust washer 10 does not meet the requirements, and the flatness detection method of the thrust washer 10 is more accurate.

[0065] In addition, each measuring point can be measured multiple times, for example, each measuring point can be measured three times, four times, five times or any other number of times, and then the data of each measuring point is averaged to obtain an average value, which can further reduce the measurement error.

[0066] It should be noted here that in the specific scraping operation, the S01 step can be used to first check whether the flatness of the thrust washer 10 meets the requirements. If the flatness of the thrust washer 10 does not meet the requirements, the thrust washer 10 is processed, and then the S02 step is used to check whether the flatness of the thrust washer 10 meets the requirements. In other words, only the S02 step can be repeated until the flatness of the thrust washer 10 meets the requirements, and then the S1 step is performed. The implementation mode of the present application does not limit this.

[0067] In order to further ensure the quality of the scraping operation, in some embodiments, after the step S3, the thrust shoe scraping method further includes:

[0068] S4: Check whether the flatness of the thrust washer 10 meets the requirements. If the flatness of the thrust washer 10 meets the requirements, the scraping is qualified; if the flatness of the thrust washer 10 does not meet the requirements, the scraping is unqualified, and the step S3 is repeated.

[0069] The method for checking the flatness of the thrust washer 10 can be the same as the method for checking the flatness in step S0, which will not be described in detail here.

[0070] like Figures 2 to 5 As shown, the present application also provides a thrust washer 10, the thrust washer 10 comprises a surface 11 to be scraped and a back surface 12 opposite to each other, the surface 11 to be scraped of the thrust washer 10 is provided with a groove, and the groove is scraped by the thrust washer scraping method of any of the above embodiments. Preferably, the material of the thrust washer 10 is babbitt alloy.

[0071] After the surface 11 of the thrust washer 10 is scraped, uniform grooves are formed on the surface 11, which has a function similar to that of "oil naan". It can ensure that the surface 11 of the thrust washer 10 is always fully oiled, and is not prone to burning, thereby effectively extending the service life of the thrust washer.

[0072] It can be understood that the above embodiments only express the preferred implementation methods of the present application, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present application; therefore, all equivalent changes and modifications made to the scope of the claims of the present application should fall within the scope of the claims of the present application.

Claims

1. A thrust bearing scraping method, characterized in that: The following steps are involved: S1: preparing a scraping platform, placing a thrust washer (10) on the scraping platform with the surface to be scraped (11) facing the scraping platform, rotating the thrust washer (10) so that the surface to be scraped (11) rubs against the scraping platform, and then checking and confirming the high point of the surface to be scraped (11) of the thrust washer (10); S2: using a scraper to scrape and grind the high point of the thrust washer (10) in a sequence of tool paths, wherein the sequence of tool paths at least includes: a vertical tool path, a transverse tool path, a left 45° tool path, and a right 45° tool path.

2. The thrust shoe scraping method according to claim 1, characterized in that: In the step S2, the length of the scratch made by the scraper each time is 11-16 mm, the width of the scratch is 3-5 mm, and the depth of the scratch is 0.01-0.02 mm.

3. The thrust shoe scraping method according to claim 1, characterized in that: After the step S2, the thrust shoe scraping method further comprises: S3: Check whether the high point of the thrust washer (10) is evenly scraped and ground. If the high point of the thrust washer (10) is not evenly scraped and ground, repeat the steps S2 and S3 until the high point of the thrust washer (10) is evenly scraped and ground.

4. The thrust shoe scraping method according to claim 3, characterized in that: The step of checking whether the high point of the thrust washer (10) is evenly scraped comprises: Place the abrasive paste on the scraping platform, then place the thrust washer (10) on the abrasive paste with the surface to be scraped (11) facing the scraping platform, and rotate the thrust washer (10) so that the surface to be scraped (11) rubs against the abrasive paste, and then check whether the high point of the thrust washer (10) is scraped evenly.

5. The thrust pad scraping method according to any one of claims 1 to 4, characterized in that: Before the step S1, the thrust shoe scraping method further comprises: S0: Check whether the flatness of the thrust washer (10) meets the requirements. If the flatness of the thrust washer (10) meets the requirements, proceed to step S1; if the flatness of the thrust washer (10) does not meet the requirements, process the thrust washer (10) and repeat step S0 until the flatness of the thrust washer (10) meets the requirements, and then proceed to step S1.

6. The thrust shoe scraping method according to claim 5, characterized in that: The step of checking whether the flatness of the thrust washer (10) meets the requirements comprises: S01: The thrust washer (10) is placed on the scraping platform with the surface to be scraped (11) facing the scraping platform, and then a micrometer is used to measure the first height values ​​of 2n measuring points symmetrically located on the back side (12) of the thrust washer (10) away from the surface to be scraped (11) to the table top of the scraping platform, where n is a positive integer and n≥2; by comparing the difference between the first height values ​​of any two of the measuring points with a preset value, it is determined whether the flatness of the thrust washer (10) meets the requirements.

7. The thrust shoe scraping method according to claim 6, characterized in that: After step S01, the step of checking whether the flatness of the thrust washer (10) meets the requirements further comprises: S02: Provide a contour block with the same thickness as the stop position of the surface (11) to be scraped of the thrust washer (10), place the contour block on the scraping platform and next to the thrust washer (10), adjust the micrometer to zero based on the contour block, and then measure the second height value from each measuring point to the table surface of the scraping platform using the zeroed micrometer, and then compare the difference between the second height values ​​of any two measuring points with the preset value to determine again whether the flatness of the thrust washer (10) meets the requirements.

8. The thrust shoe scraping method according to claim 6, characterized in that: The n=2, four measuring points are located in the inner bottom surface of the mounting groove (13) of the back side (12) of the thrust washer (10), and the four measuring points include a first measuring point (20), a second measuring point (30), a third measuring point (40), and a fourth measuring point (50) which are spaced and distributed on the same circumference; wherein the first measuring point (20) and the third measuring point (40) are arranged opposite to each other, the second measuring point (30) and the fourth measuring point (50) are arranged opposite to each other, and a line connecting the first measuring point (20) and the third measuring point (40) is a first line, and a line connecting the second measuring point (30) and the fourth measuring point (50) is a second line, and the first line and the second line are perpendicular to each other.

9. The thrust shoe scraping method according to claim 3 or 4, characterized in that: After the step S3, the thrust shoe scraping method further comprises: S4: Check whether the flatness of the thrust washer (10) meets the requirements. If the flatness of the thrust washer (10) meets the requirements, the scraping is qualified; if the flatness of the thrust washer (10) does not meet the requirements, the scraping is unqualified, and step S3 is repeated.

10. A thrust washer, characterized in that: The thrust washer (10) comprises a surface to be scraped (11) and a back surface (12) facing each other. The surface to be scraped (11) of the thrust washer (10) is provided with a groove, and the groove is scraped by the thrust washer scraping method according to any one of claims 1 to 9.

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