Centering device and installation method thereof

Abstract

The invention relates to a centering device and an installation method thereof. The centering device comprises a fixed disc, a rigid pipe and a gauge stand. The fixing disc is used for being fixedly connected with a first coupler. One end of the rigid pipe is fixedly connected with the fixed disc; the gauge stand is positioned on one side of the rigid pipe away from the fixed disc; the gauge stand comprises a side wall which is arranged around the central axis of the rigid pipe to define an avoiding cavity, and the first end, in the axial direction, of the side wall is fixedly connected with the end, away from the fixing disc, of the rigid pipe; the mounting boss is fixedly connected with the second end, in the axial direction, of the side wall, and the mounting boss protrudes outwards in the radial direction of the side wall so as to be used for mounting a first measuring meter; one end of the mounting block is connected with the mounting boss, and the mounting block protrudes out of the mounting boss towards one side far away from the side wall along the axial direction of the side wall so as to be used for mounting a second measuring meter; the inner diameter of the avoiding cavity at the second end is larger than the outer diameter of the locking nut so that the installation boss can be located on the radial outer side of the locking nut. And the position stability and the measurement accuracy of the measurement meter are improved.

Description

Technical Field

[0001] The present application relates to the technical field of shaft alignment, and in particular to a centering device and an installation method thereof. Background Art

[0002] The charging pump used in nuclear power plants is driven by an electric motor that is accelerated by a gearbox. The pump shaft of the charging pump is coaxially connected to the output shaft of the gearbox via a coupling assembly. The coupling assembly comprises a first coupling and a second coupling. The first coupling is connected to the output shaft of the gearbox, and the second coupling is connected to the pump shaft. By connecting the first and second couplings, the output shaft of the gearbox and the pump shaft of the charging pump are coaxially connected via the coupling assembly. During nuclear power plant operation, abnormal vibrations caused by poor alignment are common. Therefore, proper alignment of the pump shaft of the charging pump and the output shaft of the gearbox is extremely important.

[0003] In some usage scenarios, the distance between the pump shaft of the charging pump and the output shaft of the gearbox is relatively large. In the related art, the centering device used for this scenario includes a fixed seat, a slender rod and a measuring gauge (dial indicator or micrometer), and the fixed seat and the measuring gauge are respectively installed at the two ends of the slender rod. During the centering operation, the fixed seat is fixed to the first coupling, and one end of the slender rod extends from the fixed seat to near the second coupling, so that the measuring gauge can be closer to the second coupling. The circumferential deviation and end face deviation of the second coupling are measured by the measuring gauge to determine whether the second coupling is aligned with the first coupling, thereby determining whether the pump shaft of the charging pump and the output shaft of the gearbox are aligned.

[0004] However, under the action of the gravity of the measuring scale, the end of the slender rod where the measuring scale is installed tends to sag, resulting in a slight change in the position of the measuring scale, which can easily lead to inaccurate measurements. Summary of the Invention

[0005] Based on this, it is necessary to provide a centering device and an installation method thereof to improve the measurement accuracy as the centering device in the related art is prone to inaccurate measurement.

[0006] One embodiment of the present application provides a centering device for aligning a first shaft with a second shaft, wherein the second shaft has an external thread at one end adjacent to the first shaft, the external thread engaging with a locking nut; the centering device comprises a fixed plate, a rigid tube, and a meter frame; the fixed plate is fixedly connected to a first coupling connected to the first shaft; one end of the rigid tube is fixedly connected to the fixed plate, and the meter frame is located on a side of the rigid tube away from the fixed plate; the meter frame comprises:

[0007] a side wall, the side wall being arranged around the central axis of the rigid tube to enclose a avoidance cavity, and a first end of the side wall in the axial direction being fixedly connected to an end of the rigid tube away from the fixed plate;

[0008] a mounting boss, the mounting boss being fixedly connected to the second end of the side wall in the axial direction, the mounting boss protruding radially outward from the side wall for mounting a first measuring meter; and

[0009] a mounting block, one end of which is connected to the mounting boss, the mounting block protruding from the mounting boss along the axial direction of the side wall toward a side away from the side wall, for mounting a second measuring meter;

[0010] Wherein, the inner diameter of the avoidance cavity at the second end is larger than the outer diameter of the locking nut, so that the mounting boss can be located radially outside the locking nut.

[0011] In one embodiment, the mounting boss is an annular boss, and the mounting boss is coaxial with the side wall and is an integrally formed structure;

[0012] The centering device further includes an adjusting pad, one side of which abuts against a side of the fixing plate facing away from the rigid tube, and the other side of which abuts against an end face of the first shaft.

[0013] In one embodiment, there are multiple adjustment pads, and the thicknesses of the multiple adjustment pads are different from each other; any one of the adjustment pads can be selectively arranged between the fixed disk and the end surface of the first shaft.

[0014] In one embodiment, a positioning groove is provided on a side of the fixing plate facing away from the rigid tube; one side of the adjusting pad abuts against the bottom of the positioning groove, and the other side extends out of the positioning groove.

[0015] In one embodiment, the inner diameter of the avoidance cavity increases from small to large in a direction from the first end to the second end.

[0016] In one embodiment, the fixing plate is welded to the rigid tube, and the meter frame is welded to the rigid tube.

[0017] In one embodiment, the side wall is provided with an observation hole penetrating along the wall thickness direction.

[0018] In one embodiment, the watch frame also includes a bottom wall, which is fixedly connected to the first end of the side wall, and the side wall is arranged around the outer edge of the bottom wall; the outer diameter of the bottom wall is adapted to the inner diameter of the rigid tube, and the bottom wall is inserted into the rigid tube.

[0019] In one embodiment, the centering device further comprises:

[0020] a graphic identifier for identifying the reading of the measuring meter;

[0021] an illuminating lamp, for providing illumination for identifying the measuring meter; and

[0022] The electronic module includes a control unit and a buzzer. The control unit is used to receive the recognition result of the pattern recognizer and to control the buzzer to read out the recognition result.

[0023] An embodiment of the present application provides a method for installing a centering device, for installing the centering device described in any one of the above embodiments between a first shaft and a second shaft, the method comprising the following steps:

[0024] Adjusting the connection structure of the fixing plate, the rigid tube, and the meter frame to a first position, wherein the connection structure is located outside the space between the first shaft and the second shaft in the first position, and a plane on a side of the mounting boss close to the second shaft is located on a side of the second shaft close to the first shaft;

[0025] moving the connecting structure in a radial direction to a second position so that the connecting structure is located between the first shaft and the second shaft;

[0026] The connecting structure is moved axially toward the second shaft to a third position, so that the end of the second shaft close to the first shaft and the portion of the locking nut connected thereto are located within the avoidance cavity, and an adjustment pad is provided between the fixed plate and the first shaft;

[0027] The connecting structure is moved axially to a fourth position in a direction close to the first shaft, so that the fixing disk and the first shaft clamp the adjusting pad.

[0028] In the above-mentioned centering device and its installation method, the inner diameter of the avoidance cavity at the second end of the side wall is larger than the outer diameter of the locking nut, thereby avoiding the locking nut, so that the mounting boss can be located radially outside the locking nut, so that the first measuring gauge installed on the mounting boss can fully abut the end face of the second coupling to measure the end face of the second coupling, and the second measuring gauge installed on the mounting block can measure the outer peripheral surface of the second coupling. The rigid tube of the embodiment of the present application does not need to extend to the radial outside of the locking nut, so it does not need to be made into a slender structure, so the rigid tube can be made into a thicker pipe; and the fixed plate fixed to the first coupling and the meter frame are rigidly connected by the rigid tube, so that the rigid tube has better support for the meter frame, and the measuring gauge on the meter frame is not easy to sag under the action of gravity, thereby improving the position stability of the measuring gauge and fully improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the positional relationship among the first shaft, the first coupling, the second shaft, and the second coupling in the embodiment of the present application.

[0030] Figure 2 Schematic diagram of the centering device in a fourth position between the first shaft and the second shaft according to an embodiment of the present application.

[0031] Figure 3 Schematic diagram of the centering device according to an embodiment of the present application in a first position outside the first axis and the second axis.

[0032] Figure 4 Schematic diagram of the centering device in a second position between the first axis and the second axis according to an embodiment of the present application.

[0033] Figure 5 FIG. 1 is a schematic diagram of a centering device in a third position between the first shaft and the second shaft according to an embodiment of the present application.

[0034] Figure 6 This is a schematic diagram of the side of the fixed plate facing the second axis according to an embodiment of the present application.

[0035] Figure 7 This is a schematic diagram of an electronic module provided in the centering device according to an embodiment of the present application.

[0036] Reference numerals:

[0037] 10. First shaft; 20. Second shaft; 30. First coupling; 40. Second coupling; 50. Lock nut; 60. Anti-loosening washer;

[0038] 100, fixing plate; 101, positioning groove; 102, first connecting hole; 103, first positioning hole; 104, strip fixing hole; 105, weight reduction hole; 106, annular groove;

[0039] 200, rigid tube;

[0040] 300, meter stand; 310, side wall; 311, avoidance cavity; 312, observation hole; 320, mounting boss; 321, first measuring meter; 330, mounting block; 331, second measuring meter; 340, bottom wall;

[0041] 400, adjust the pad;

[0042] 510, pattern recognizer; 520, lighting lamp; 530, control unit; 540, buzzer; 550, display screen; 560, wireless transmission module. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0045] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0046] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0049] like Figure 1 As shown, in a nuclear power plant, a first coupling 30 is sleeved and connected to the output shaft (first shaft 10) of the gearbox, and a second coupling 40 is sleeved and connected to the pump shaft (second shaft 20) of the charging pump. By connecting the first coupling 30 and the second coupling 40, the output shaft (first shaft 10) of the gearbox and the pump shaft (second shaft 20) of the charging pump are coaxially connected through the coupling assembly. In some scenarios in the related art, the distance between the pump shaft (second shaft 20) of the charging pump and the output shaft (first shaft 10) of the gearbox (not shown) is relatively large. The pump shaft (second shaft 20) of the charging pump extends out of the second coupling 40 toward one end of the gearbox and has external threads. A lock nut 50 is screwed into the external threads of the pump shaft (second shaft 20) of the charging pump, and a locking washer 60 is provided between the lock nut 50 and the end surface of the second coupling 40. When the lock nut 50 is tightened against the pump shaft (second shaft 20), the end faces of the lock nut 50 and the second coupling 40 clamp the two sides of the anti-loosening washer 60, thereby locking the pump shaft (second shaft 20) of the upper charging pump and the second coupling 40. This causes the lock nut 50 to form a protrusion structure on the end of the pump shaft (second shaft 20) of the upper charging pump and the second coupling 40 near the gearbox.

[0050] The reason why the centering device in the related art uses a slender rod to connect the fixed base and the measuring gauge is that, on the one hand, the slender rod is long, which allows the centering device to adapt to the distance between the first coupling 30 and the second coupling 40; on the other hand, when performing the centering measurement, the measuring gauge must be close enough to the end face of the second coupling 40 so that the contact of the measuring gauge can abut the end face of the second coupling 40 for measurement. The slender rod is not blocked by the locking nut 50 and can be located radially outside the locking nut 50 and extend to the vicinity of the end face of the second coupling 40, so that the contact of the measuring gauge can touch the end face of the second coupling 40. However, precisely because of the slender rod structure, under the action of the gravity of the measuring gauge, the end of the slender rod where the measuring gauge is installed tends to sag, resulting in slight changes in the position of the measuring gauge and prone to inaccurate measurements.

[0051] In view of this, an embodiment of the present application provides a centering device, which can improve the accuracy of measurement for the alignment between the pump shaft of the charging pump and the output shaft of the gearbox in the above scenario.

[0052] Combine Figure 1 and Figure 2 One embodiment of the present application provides a centering device for aligning a first shaft 10 with a second shaft 20. In this embodiment, the first shaft 10 may be the output shaft of a gearbox, and the second shaft 20 may be the pump shaft of a charging pump. Of course, the centering device can also be used to align other types of first and second shafts 10, 20, as long as the two shafts are aligned.

[0053] The first coupling 30 is sleeved and coaxially connected to the first shaft 10 , and the second coupling 40 is sleeved and coaxially connected to the second shaft 20 . The second coupling 40 extends from one end of the second shaft 20 close to the first shaft 10 and is tightened with the locking nut 50 .

[0054] The centering device includes a fixed plate 100, a rigid tube 200, and a gauge frame 300. The fixed plate 100 is coaxially fixedly connected to the first coupling 30. One end of the rigid tube 200 is coaxially fixedly connected to the fixed plate 100, and the gauge frame 300 is located on the side of the rigid tube 200 away from the fixed plate 100.

[0055] The watch stand 300 includes a side wall 310 , a mounting boss 320 , and a mounting block 330 .

[0056] The sidewall 310 is disposed around the central axis of the rigid tube 200 to enclose a relief cavity 311. That is, the relief cavity 311 is coaxially disposed with the rigid tube 200. A first axial end of the sidewall 310 is coaxially fixedly connected to an end of the rigid tube 200 away from the fixed plate 100.

[0057] The mounting boss 320 is fixedly connected to the second end of the side wall 310 in the axial direction. The mounting boss 320 protrudes outward from the side wall 310 in the radial direction of the side wall 310 to be used for mounting the first measuring meter 321 .

[0058] One end of the mounting block 330 is connected to the mounting boss 320 . The mounting block 330 protrudes from the mounting boss 320 along the axial direction of the side wall 310 away from the side wall 310 to be used for mounting the second measuring meter 331 .

[0059] The inner diameter of the avoidance cavity 311 at the second end of the side wall 310 is larger than the outer diameter of the locking nut 50 , so that the mounting boss 320 can be located radially outside the locking nut 50 .

[0060] Specifically, the sidewall 310 is disposed around the central axis of the rigid tube 200 to enclose a clearance cavity 311. Because the inner diameter of the clearance cavity 311 at the second end of the sidewall 310 is larger than the outer diameter of the locking nut 50, the mounting boss 320 at the second end of the sidewall 310 can be located radially outward of the locking nut 50. Thus, the mounting boss 320 is not axially blocked by the locking nut 50, allowing the mounting boss 320 to be sufficiently close to the end face of the second coupling 40. Furthermore, the first measuring gauge 321 mounted on the mounting boss 320 can fully abut the end face of the second coupling 40 to measure the end face of the second coupling 40.

[0061] One end of the mounting block 330 is connected to the mounting boss 320, and the mounting block 330 protrudes from the mounting boss 320 along the axial direction of the side wall 310 toward the side away from the side wall 310, that is, the mounting block 330 extends from the second end of the side wall 310 toward the direction away from the first end. In this way, the mounting block 330 can extend to be opposite to the outer peripheral surface of the second coupling 40, so that the contact of the second measuring meter 331 installed on the mounting block 330 can abut against the outer peripheral surface of the second coupling 40 to measure the outer peripheral surface of the second coupling 40.

[0062] Specifically, one end of the mounting block 330 is located on the radially outward side of the mounting boss 320 along the side wall 310, so that the mounting block 330 can maintain a certain distance from the second coupling 40 along the radial direction of the second coupling 40 to provide installation space for the contacts of the second measuring meter 332.

[0063] It is understandable that when the centering device performs centering measurements on the first shaft 10 and the second shaft 20, two first measuring gauges 321 are provided, one located on either side of the central axis of the side wall 310 along the diameter of the side wall 310. This allows for measurement at two locations on the end face of the second coupling 40, located on either side of the central axis along the diameter. The second measuring gauge 331 radially abuts the outer circumferential surface of the second coupling 40. This allows for the three-gauge alignment method to be used for centering measurements of the second coupling 40 and the first coupling 30, that is, for centering measurements of the first shaft 10 and the second shaft 20. The three-gauge alignment method can be referenced to existing technologies and will not be described in detail.

[0064] In the above-mentioned centering device, the inner diameter of the avoidance cavity 311 at the second end of the side wall 310 is larger than the outer diameter of the locking nut 50, so that the locking nut 50 can be avoided, so that the mounting boss 320 can be located radially outside the locking nut 50, so that the first measuring gauge 321 installed on the mounting boss 320 can fully abut the end face of the second coupling 40 to measure the end face of the second coupling 40, and the second measuring gauge 331 installed on the mounting block 330 can measure the outer peripheral surface of the second coupling 40. (Compared to the meter holder 300 being set on a slender rod) the rigid tube 200 of the embodiment of the present application does not need to extend to the radially outer side of the locking nut 50, so it does not need to be made into a slender structure, so that the rigid tube 200 can be made into a thicker pipe; and the fixed plate 100 fixed to the first coupling 30 and the meter holder 300 are rigidly connected through the rigid tube 200, so that the rigid tube 200 has better support for the meter holder 300, and the measuring meter on the meter holder 300 is not easy to sag under the action of gravity, thereby improving the position stability of the measuring meter and fully improving the measurement accuracy.

[0065] As previously described, when using the three-gauge alignment method for centering measurement, the two first measuring gauges 320 need to be accurately distributed on both sides of the central axis of the side wall 310 along the diameter direction of the side wall 310. Therefore, two mounting bosses 320 can be fixed in the diameter direction of the side wall 310, and the two first measuring gauges 320 can be installed separately. However, this method requires that the side wall 310 be machined first, and then two mounting bosses 320 are provided, and the two mounting bosses 320 are distributed and fixed on the side wall 310. The accumulated errors caused by reasons such as machining errors of the mounting bosses 320 and installation errors on the side wall 310 can easily lead to positional errors in the two first measuring gauges 320, and they cannot be strictly distributed in the diameter direction of the side wall 310.

[0066] To this end, in one embodiment, the mounting boss 320 is an annular boss coaxial with the sidewall 310 and integrally formed. The mounting boss 320 is provided with two first mounting holes arranged diametrically, each for mounting two first measuring gauges 321. The centering device also includes an adjustment plate 400. One side of the adjustment plate 400 abuts the side of the fixed plate 100 facing away from the rigid tube 200, while the other side abuts the end face of the first shaft 10.

[0067] In this embodiment, the mounting boss 320 and the sidewall 310 can be integrally formed through machining, allowing the annular mounting boss 320 to form a highly concentric structure with the sidewall 310. Two first mounting holes are then provided on the mounting boss 320, arranged diametrically. This ensures high positional accuracy between the two first mounting holes, thereby ensuring high positional accuracy of the two first measuring gauges 320, which are strictly distributed along the diameter of the sidewall 310. Furthermore, due to the structure of the mounting boss 320 in this embodiment, an adjustment pad 400 is also required for the centering device to ensure reliable installation during centering measurements.

[0068] Specifically, please combine Figures 2 to 5 The installation method for installing the centering device between the first shaft 10 and the second shaft 20 includes the following steps S100 to S400.

[0069] S100: Reference Figure 3 , adjust the connection structure of the fixed plate 100, the rigid tube 200 and the table frame 300 to the first position, wherein the connection structure is located outside the space between the first shaft 10 and the second shaft 20 in the first position, and the plane where the side surface of the mounting boss 320 close to the second shaft 20 is located is located on the side of the second shaft 20 close to the first shaft 10.

[0070] Specifically, if Figure 3 As shown, the plane where the surface of the mounting boss 320 close to the second shaft 20 is located is defined as the first plane S1, and the end surface of the second shaft 20 close to the first shaft 10 is defined as the second plane S2. When the centering device is located outside the space between the first shaft 10 and the second shaft 20, it is necessary to first adjust the connection structure of the fixing plate 100, the rigid tube 200 and the meter frame 300 to the first position, that is, Figure 3 In this way, the first plane S1 can be located on the side of the second plane S2 close to the first axis 10.

[0071] S200: Reference Figure 4 , move the connecting structure radially to the second position so that the connecting structure is located between the first shaft 10 and the second shaft 20.

[0072] After the connection structure is moved to the first position in step S100, the connection structure is moved radially along the rigid tube 200 to move the connection structure between the first shaft 10 and the second shaft 20. Figure 3 and Figure 4 It can be understood that in the process of moving from the first position to the second position, since the first plane S1 is located on the side of the second plane S2 close to the first shaft 10, the mounting boss 320 will not be blocked by the second shaft 20 and the locking nut 50, and the above-mentioned connecting structure can smoothly enter between the first shaft 10 and the second shaft 20.

[0073] It is understood that although mounting block 330 protrudes from mounting boss 320, it only needs to mount second measuring gauge 331. Therefore, mounting block 330 is not an annular extension but rather a localized feature. Therefore, during the movement of the connecting structure from the first position to the second position, mounting block 330 does not prevent the connecting structure from entering between first shaft 10 and second shaft 20.

[0074] S300: Reference Figure 5 , move the connecting structure axially toward the second shaft 20 to the third position, so that the second shaft 20 close to the end of the first shaft 10 and the locking nut 50 connected thereto are located in the avoidance cavity 311. Figure 5 , and then an adjustment pad 400 is set between the fixed plate 100 and the first shaft 10.

[0075] refer to Figure 4 It can be understood that when the above-mentioned connection structure reaches the second position, the distance between the mounting boss 320 and the end face of the second coupling 40 is relatively large, and there is also a distance between the right end of the fixed disk 100 and the first shaft 10 .

[0076] In step S300, the connecting structure is moved axially toward the second shaft 20, thereby moving from the second position to the third position. This positions the portion of the second shaft 20 proximate to the first shaft 10 and the locking nut 50 connected thereto within the avoidance cavity 311. This increases the distance between the fixed disk 100 and the first shaft 10. This facilitates the placement of the adjustment plate 400 between the fixed disk 100 and the first shaft 10. It is understood that the adjustment plate 400 can be moved radially along the fixed disk 100 to enter between the fixed disk 100 and the first shaft 10 from the outside of the fixed disk 100.

[0077] S400: Reference Figure 2 , move the connecting structure axially toward the first shaft 10 to the fourth position so that the fixed plate 100 and the first shaft 10 clamp the adjustment pad 400, and then fix the fixed plate 100 to the first coupling 30.

[0078] After step S300 , the adjustment plate 400 enters between the fixing plate 100 and the first shaft 10 , but is not clamped by the fixing plate 100 and the first shaft 10 .

[0079] By this step, the connection structure is moved to the fourth position, such as Figure 2 As shown, the fixing plate 100 and the first shaft 10 are clamped to adjust the shim 400. Finally, the fixing plate 100 and the first coupling 30 are locked and fixed.

[0080] When the fixed disk 100 and the first coupling 30 are fixed, the fixed disk 100 and the first shaft 10 clamp the adjustment pad 400, so that the relative position between the fixed disk 100 and the first shaft 10 in the axial direction can be stabilized, which is also conducive to the reliable fixation of the fixed disk 100 and the first coupling 30.

[0081] After step S400, the first measuring meter 321 and the second measuring meter 331 can be installed on the meter stand 300. Then, the three-meter alignment method is used to perform centering measurement.

[0082] As can be seen, this embodiment integrates the mounting boss 320 and the sidewall 310 to form a highly concentric structure. Furthermore, two first mounting holes are provided on the mounting boss 320, arranged along the diameter. This facilitates highly accurate positioning of the two first measuring gauges 320, ensuring their strict distribution along the diameter of the sidewall 310. Furthermore, by configuring the centering device with an adjustment pad 400, the centering device can be securely installed between the first shaft 10 and the second shaft 20 using the aforementioned installation method.

[0083] Please combine Figures 2 to 5 In one embodiment, a positioning groove 101 is provided on the side of the fixing plate 100 facing away from the rigid tube 200. One side of the adjustment pad 400 abuts against the bottom of the positioning groove 101, and the other side extends out of the positioning groove 101.

[0084] Specifically, the adjusting plate 400 is positioned by the positioning groove 101 , so that the adjusting plate 400 is not easily displaced during the process of installing and disassembling the centering device.

[0085] Please combine Figure 2 and Figure 6 In one embodiment, a first connecting hole 102 is provided on the fixing plate 100, and a second connecting hole aligned with the first connecting hole 102 is provided on the adjusting pad 400. The first connecting hole 102 is used for the screw of the bolt to pass through, and the second connecting hole is used for threaded connection with the screw.

[0086] Specifically, the screw rod of the bolt can be sequentially inserted into the first connecting hole 102 and the second connecting hole, and threadedly engaged with the second connecting hole, and the head of the bolt can be brought into contact with the fixed plate 100, thereby reliably connecting the fixed plate 100 to the adjustment plate 400. Therefore, during the installation and removal of the centering device, the adjustment plate 400 can be prevented from falling due to gravity by the restraint of the bolt.

[0087] In one embodiment, there are multiple adjustment plates 400 , and the thicknesses of the multiple adjustment plates 400 are different from each other. Any one of the adjustment plates 400 can be selectively disposed between the fixed disk 100 and the end surface of the first shaft 10 .

[0088] It can be understood that adjusting the thickness of the backing plate 400 affects the distance between the mounting boss 320 and the end surface of the second coupling 40 , thereby affecting the position of the contact of the first measuring gauge 321 .

[0089] In this embodiment, by providing a plurality of adjustment pads 400, any one of the plurality of adjustment pads 400 can be selected and disposed between the fixed disk 100 and the end surface of the first shaft 10, thereby selectively adjusting the distance between the mounting boss 320 and the end surface of the second coupling 40, facilitating adjustment of the position of the first measuring gauge 321, and providing a more accurate and preferred measurement position for the first measuring gauge 321.

[0090] In one embodiment, the fixing plate 100 is welded to the rigid tube 200 , and the watch frame 300 is welded to the rigid tube 200 .

[0091] By welding the fixed plate 100 to one end of the rigid tube 200 and the meter frame 300 to the other end of the rigid tube 200, the rigid tube 200 is less likely to sag relative to the fixed plate 100, and the meter frame 300 is less likely to sag relative to the rigid tube 200, thereby improving the position stability of the meter frame 300, that is, improving the measurement accuracy.

[0092] Further, combined with Figures 2 to 5 In one embodiment, the fixing plate 100 is provided with a first positioning hole 103 , and the rigid tube 200 is inserted into the first positioning hole 103 and welded to the fixing plate 100 .

[0093] The rigid tube 200 is positioned through the first positioning hole 103 , which can fully ensure that the rigid tube 200 and the fixing plate 100 are coaxial during welding, thereby enabling accurate positioning of the rigid tube 200 .

[0094] Combine Figures 2 to 5 In one embodiment, the inner diameter of the avoidance cavity 311 gradually increases from the first end to the second end, thereby forming a tapered avoidance cavity 311 .

[0095] Specifically, refer to Figure 2 It is understood that when the locking nut 50 is tightened, the end of the second shaft 20 facing the first shaft 10 slightly extends beyond the end of the locking nut 50 close to the first shaft 10. The outer diameter of the extended portion of the second shaft 20 is smaller than that of the locking nut 50.

[0096] In this embodiment, by forming a gradually tapering relief cavity 311, the portion with a smaller inner diameter of the relief cavity 311 can accommodate the portion of the second shaft 20 that slightly protrudes from the locking nut 50, while the portion with a larger inner diameter of the relief cavity 311 (i.e., the portion located at the second end of the sidewall 310) can accommodate the locking nut 50. Furthermore, the entire sidewall 310 is relatively small, and when wrapped around the locking nut 50 and the second shaft 20, the overall structure is compact.

[0097] refer to Figure 2 In one embodiment, the watch frame 300 further includes a bottom wall 340, which is fixedly connected to the first end of the side wall 310, and the side wall 310 is disposed around the outer edge of the bottom wall 340. The outer diameter of the bottom wall 340 is adapted to the inner diameter of the rigid tube 200, and the bottom wall 340 is inserted into the rigid tube 200.

[0098] Specifically, the bottom wall 340 and the side wall 310 can be integrally formed. The bottom wall 340 is inserted into the rigid tube 200, thereby positioning the meter stand 300. This allows the meter stand 300 to be accurately and securely positioned at the end of the rigid tube 200, thereby ensuring a stable position for the meter stand 300 and the meter itself, thereby improving measurement accuracy.

[0099] Please refer to Figure 2 In one embodiment, the side wall 310 is provided with an observation hole 312 that passes through along the wall thickness direction.

[0100] Specifically, the interior of the avoidance cavity 311 can be observed through the observation hole 312. During the installation of the centering device between the first shaft 10 and the second shaft 20, it is convenient to observe whether the locking nut 50 and the second shaft 20 are rubbing against the wall of the avoidance cavity 311. If so, the position of the centering device can be adjusted promptly.

[0101] Understandably, during the three-meter alignment method, the first shaft 10 must be controlled to rotate, driving the alignment device to rotate together, thereby adjusting the positions of the first and second measuring gauges 321, 331 to measure multiple positions. During the rotation of the alignment device, the interior of the avoidance cavity 311 can be observed through the observation hole 312 to promptly determine whether the locking nut 50 and the second shaft 20 are rubbing against the walls of the avoidance cavity 311. If so, the position of the alignment device can be adjusted promptly.

[0102] Please refer to Figure 6 In one embodiment, the fixing plate 100 is provided with a strip-shaped fixing hole 104 , and the length direction of the strip-shaped fixing hole 104 is along the radial direction of the fixing plate 100 .

[0103] Specifically, the first coupling 30 is provided with a locking hole (not shown) corresponding to the strip-shaped fixing hole 104. Bolts are passed through the strip-shaped fixing hole 104 and the locking hole in sequence, thereby locking the fixing plate 100 and the first coupling 30.

[0104] Since the length direction of the strip-shaped fixing hole 104 is along the radial direction of the fixing disk 100, the bolt can pass through different positions of the strip-shaped fixing hole 104 along the length direction, so that it can be connected with the locking holes at different positions along the diameter direction, and then can be adapted to the first coupling 30 of different diameters.

[0105] Please refer to Figure 7 In one embodiment, the centering device further includes: a pattern recognizer 510, an illumination lamp 520, and an electronic module. The pattern recognizer 510 is used to recognize the reading of the meter. The illumination lamp 520 is used to provide illumination for meter identification. The electronic module includes a control unit 530 and a buzzer 540. The control unit 530 is used to receive the recognition result of the pattern recognizer 510 and control the buzzer 540 to read the recognition result.

[0106] Specifically, each first measurement meter 321 and second measurement meter 331 can be respectively configured with a corresponding graphic identifier 510 and lighting lamp 520. The graphic identifier 510 and lighting lamp 520 can be set on or near the corresponding measurement meter (for example, on a mounting boss or a side wall of a meter stand).

[0107] In situations where the meter reading is difficult to observe (e.g., in dimly lit environments), illumination 520 is used to illuminate the reading environment of pattern recognizer 510, allowing pattern recognizer 510 to recognize the corresponding meter reading. After receiving the recognition result from pattern recognizer 510, control unit 530 controls buzzer 540 to read the recognition result, thereby facilitating easy acquisition of the meter reading. Control unit 530 is, for example, a microcomputer processor.

[0108] Please refer to Figure 6 In one embodiment, the fixed plate 100 is provided with a plurality of weight-reducing holes 105 , and the plurality of weight-reducing holes 105 are sequentially spaced apart along the circumference of the fixed plate 100 .

[0109] Please refer to Figures 2 to 5 In one embodiment, the fixing plate 100 is provided with an annular groove 106 , which is arranged on the outer edge of the fixing plate 100 close to the first shaft 10 , for reducing stress and facilitating processing.

[0110] Please refer to Figure 7In one embodiment, the electronic module further includes a display screen 550 , and the control unit 530 is configured to control the display screen 550 to display the recognition result of the pattern recognizer 510 , thereby facilitating the staff to read the reading of the measuring meter from the display screen 550 .

[0111] Please refer to Figure 7 In one embodiment, the electronic module further includes a wireless transmission module 560 for receiving instructions from the mobile terminal, and the control unit 530 is used to control the buzzer 540 to emit a sound according to the instructions.

[0112] The mobile terminal is, for example, a mobile phone. The command from the mobile terminal is, for example, a command to adjust the volume, or a command to adjust the voice type (e.g., male or female voice). By operating the mobile terminal to issue a command, the wireless transmission module transmits the command to the control unit 530, so that the control unit 530 can control the sound emitted by the buzzer according to the command. The wireless transmission module 560 is, for example, a Wi-Fi, Bluetooth, infrared transmission module, etc.

[0113] In one embodiment, the electronic module includes a housing, within which the control unit 530 and the wireless transmission module 560 may be disposed. The housing may be secured within the rigid tube 200. The housing and the rigid tube 200 may be secured by bolts. A locking spring may be provided between the housing and the inner wall of the rigid tube 200 to maintain the housing's stability.

[0114] In one embodiment, the centering device further includes a power source, such as a lithium battery, for supplying power to the control unit 530 , the wireless transmission module 560 , the lighting 520 , the pattern recognizer 510 , and the like.

[0115] In one embodiment, the centering device further includes an angle measuring device provided on the rigid tube 200, which is used to measure the angle of the centering device rotating along the first shaft 10. When the angle value meets a preset value, the control unit 530 is used to control the buzzer 540 to emit a sound signal.

[0116] As described in the above embodiment, when performing centering measurement using the three-meter alignment method, it is necessary to control the rotation of the first shaft 10 to drive the centering device to rotate together, thereby adjusting the positions of the first measuring meter 321 and the second measuring meter 331 to measure multiple positions.

[0117] In this embodiment, an angle gauge can be mounted on the rigid tube 200 and rotated synchronously with the first shaft 10, thereby measuring the rotation angle of the first shaft 10. A preset value for the rotation angle is stored in the control unit 530. When the centering device rotates with the first shaft 10 to the preset value, it indicates that the first and second measuring gauges 321, 331 are properly adjusted. Upon receiving the angle value measured by the angle gauge, if the angle value meets the preset value, the control unit 530 controls the buzzer 540 to emit an audible signal. This signal allows personnel to promptly detect that the first and second measuring gauges 321, 331 are properly adjusted, thereby promptly stopping the rotation of the first shaft 10.

[0118] An embodiment of the present application further provides a method for installing a centering device, comprising the following steps:

[0119] S100: Adjust the connection structure of the fixed plate 100, the rigid tube 200 and the table frame 300 to the first position, wherein the connection structure is located outside the space between the first axis 10 and the second axis 20 in the first position, and the plane where the side surface of the mounting boss 320 close to the second axis 20 is located is located on the side of the second axis 20 close to the first axis 10.

[0120] S200 : moving the connecting structure to a second position in the radial direction, so that the connecting structure is located between the first shaft 10 and the second shaft 20 .

[0121] S300: The connecting structure is moved axially toward the second shaft 20 to a third position, so that the portion of the second shaft 20 adjacent to the first shaft 10 and the locking nut 50 connected thereto is located within the avoidance cavity 311. An adjustment pad 400 is then positioned between the fixing plate 100 and the first shaft 10.

[0122] S400: Reference Figure 2 , move the connecting structure axially toward the first shaft 10 to the fourth position so that the fixed plate 100 and the first shaft 10 clamp the adjustment pad 400, and then fix the fixed plate 100 to the first coupling 30.

[0123] In the above-mentioned centering method, the inner diameter of the avoidance cavity 311 at the second end of the side wall 310 is larger than the outer diameter of the locking nut 50, thereby avoiding the locking nut 50 so that the mounting boss 320 can be located radially outside the locking nut 50, so that the first measuring gauge 321 installed on the mounting boss 320 can fully abut the end face of the second coupling 40 to measure the end face of the second coupling 40, and the second measuring gauge 331 installed on the mounting block 330 can measure the outer peripheral surface of the second coupling 40. The rigid tube 200 of the embodiment of the present application does not need to extend to the radially outer side of the locking nut 50, so it does not need to be made into a slender structure, so that the rigid tube 200 can be made into a thicker pipe; and the fixed plate 100 fixed to the first coupling 30 and the meter frame 300 are rigidly connected through the rigid tube 200, so that the rigid tube 200 has better support for the meter frame 300, and the measuring meter on the meter frame 300 is not easy to sag under the action of gravity, thereby improving the position stability of the measuring meter and fully improving the measurement accuracy.

[0124] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A centering device for aligning a first shaft with a second shaft, wherein the second shaft has an external thread at one end adjacent to the first shaft, and the external thread cooperates with a locking nut; characterized in that: The centering device includes a fixed plate, a rigid tube, and a meter frame; the fixed plate is used to be fixedly connected to the first coupling connected to the first shaft; one end of the rigid tube is fixedly connected to the fixed plate, and the meter frame is located on a side of the rigid tube away from the fixed plate; the meter frame includes: a side wall, the side wall being arranged around the central axis of the rigid tube to enclose a avoidance cavity, and a first end of the side wall in the axial direction being fixedly connected to an end of the rigid tube away from the fixed plate; a mounting boss, the mounting boss being fixedly connected to the second end of the side wall in the axial direction, the mounting boss protruding radially outward from the side wall for mounting a first measuring meter; and a mounting block, one end of which is connected to the mounting boss, the mounting block protruding from the mounting boss along the axial direction of the side wall toward a side away from the side wall, for mounting a second measuring meter; Wherein, the inner diameter of the avoidance cavity at the second end is larger than the outer diameter of the locking nut, so that the mounting boss can be located radially outside the locking nut.

2. The centering device according to claim 1, characterized in that: The mounting boss is an annular boss, and the mounting boss is coaxial with the side wall and is an integrally formed structure; The centering device further includes an adjusting pad, one side of which abuts against a side of the fixing plate facing away from the rigid tube, and the other side of which abuts against an end face of the first shaft.

3. The centering device according to claim 2, characterized in that: There are multiple adjustment pads, and the thicknesses of the multiple adjustment pads are different from each other; any one of the adjustment pads can be selectively arranged between the fixed disk and the end surface of the first shaft.

4. The centering device according to claim 2, characterized in that: A positioning groove is provided on the side of the fixing plate facing away from the rigid tube; one side of the adjusting pad abuts against the bottom of the positioning groove, and the other side extends out of the positioning groove.

5. The centering device according to claim 1, characterized in that: In a direction from the first end to the second end, the inner diameter of the avoidance cavity increases from small to large.

6. The centering device according to claim 1, characterized in that: The fixing plate is welded to the rigid tube, and the meter frame is welded to the rigid tube.

7. The centering device according to claim 1, characterized in that: The side wall is provided with an observation hole which penetrates along the wall thickness direction.

8. The centering device according to claim 1, characterized in that: The watch frame also includes a bottom wall, which is fixedly connected to the first end of the side wall, and the side wall is arranged around the outer edge of the bottom wall; the outer diameter of the bottom wall is adapted to the inner diameter of the rigid tube, and the bottom wall is inserted into the rigid tube.

9. The centering device according to claim 1, characterized in that: Also includes: a graphic identifier for identifying the reading of the measuring meter; an illuminating lamp, for providing illumination for identifying the measuring meter; as well as The electronic module includes a control unit and a buzzer. The control unit is used to receive the recognition result of the pattern recognizer and to control the buzzer to read out the recognition result.

10. A method for installing a centering device, characterized in that: The centering device according to any one of claims 1 to 9 is installed between the first shaft and the second shaft, and the installation method comprises the following steps: Adjusting the connection structure of the fixing plate, the rigid tube, and the meter frame to a first position, wherein the connection structure is located outside the space between the first shaft and the second shaft in the first position, and a plane on a side of the mounting boss close to the second shaft is located on a side of the second shaft close to the first shaft; moving the connecting structure in a radial direction to a second position so that the connecting structure is located between the first shaft and the second shaft; The connecting structure is moved axially toward the second shaft to a third position, so that the end of the second shaft close to the first shaft and the portion of the locking nut connected thereto are located within the avoidance cavity, and an adjustment pad is provided between the fixed plate and the first shaft; The connecting structure is moved axially to a fourth position in a direction close to the first shaft, so that the fixing disk and the first shaft clamp the adjusting pad.

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