Trunnion wedge keyway repair device and repair method

Abstract

The present invention relates to the technical field of keyway repair on shaft parts, and specifically to a device for repairing a keyway position of an ear shaft wedge and a repair method thereof. When a template is placed on the ear shaft, the arc portion abuts against the outer wall of the ear shaft, and at the same time, the first positioning surface coincides with the transverse surface of the keyway and the second positioning surface coincides with the vertical surface of the keyway. A grinding assembly is provided on the sliding frame; the grinding assembly includes a grinding disc, and when the grinding surface of the grinding disc is flush with the first positioning surface, it is used to grind the positioning protrusion for repairing the transverse surface of the keyway; when the grinding surface of the grinding disc is flush with the second positioning surface, the grinding disc grinds the positioning protrusion for repairing the vertical surface of the keyway. The present invention limits the grinding of the positioning protrusion by the grinding disc through the first positioning surface of the template, and then abuts against the polished positioning protrusion through the first positioning surface, so that the grinding disc can accurately complete the grinding of the positioning protrusion for repairing the vertical surface, thereby enabling the keyway to be accurately repaired.

Description

Technical Field

[0001] The invention relates to the technical field of keyway repairing on shaft parts, and in particular to a device and a method for repairing a wedge-shaped keyway position of a trunnion. Background Art

[0002] During long-term use of shaft parts, the keyway on the transmission shaft is prone to wear and deformation due to the large transmission force it bears. When the wear and deformation are too large, it affects the normal operation of the equipment and also produces a lot of noise. In this case, the keyway of the transmission shaft must be repaired or the transmission shaft must be replaced. For transmission shafts with larger diameters, due to their high manufacturing costs and the fact that there are usually no spare parts, it takes a long time to manufacture, so repair is usually used to restore the normal use of the transmission shaft.

[0003] A Chinese patent application document with application publication number CN105149860A discloses a nuclear power plant pump shaft repair process, including repairing the keyway of the pump shaft. Repairing the keyway of the pump shaft means: if the side of the keyway on the pump shaft is slightly damaged, it is smoothed with a file; if a more serious skew phenomenon occurs, it is repaired by surfacing welding; when repairing, the prototype of the keyway is first surfacing with arc welding, and then the original size and shape of the keyway are restored by milling, planing or manual filing. The keyway position can also be changed for repair, that is, the original keyway position is first laser clad, and then, the surface curvature radius is made the same as the shaft diameter by curved filing to form a smooth connection, and finally the shaft is rotated half a circle, and a new keyway is machined according to the original keyway size and shape at the corresponding position on the back of the original keyway.

[0004] However, when shaft components are too large, keyway repair is usually carried out on site to save time on disassembly and transportation of components. Therefore, the keyway cannot be restored by a milling machine or a planer, making it difficult to accurately restore the size of the keyway during the keyway repair process; especially for wedge-shaped keyways, if both the transverse and vertical surfaces are worn, the keyway cannot be processed using the transverse or vertical surface as a reference. Summary of the invention

[0005] The present invention provides a device and method for repairing a wedge-shaped keyway of an ear shaft, aiming to solve the problem in the related art that it is difficult to accurately repair the keyway after the wedge-shaped keyway is worn on both the horizontal and vertical surfaces.

[0006] A device for repairing a trunnion wedge-shaped keyway of the present invention comprises:

[0007] The template comprises an arc portion and a positioning portion, wherein the inner diameter of the arc portion is equal to the outer wall radius of the ear shaft, the positioning portion is located in the inner middle of the arc portion, and the positioning portion has a first positioning surface and a second positioning surface perpendicular to each other; when the template is placed on the ear shaft, the arc portion abuts against the outer wall of the ear shaft, the positioning portion is located in the keyway, and the first positioning surface coincides with the transverse surface of the keyway and the second positioning surface coincides with the vertical surface of the keyway;

[0008] A connecting rod is vertically fixed on the template, a sliding frame is slidably arranged on the connecting rod along the length direction of the connecting rod, and a grinding assembly is arranged on the sliding frame;

[0009] The grinding assembly includes a grinding disk, which is used to grind the positioning protrusion for repairing the horizontal surface of the keyway when the grinding surface of the grinding disk is flush with the first positioning surface; when the direction of the grinding disk is adjusted so that the grinding surface of the grinding disk is flush with the second positioning surface, the first positioning surface is supported on the top of the polished positioning protrusion, and the grinding disk is used to grind the positioning protrusion for repairing the vertical surface of the keyway.

[0010] The effect is that the template has a first positioning surface and a second positioning surface that are perpendicular to each other. When the grinding disc of the grinding assembly is installed on the sliding frame, the grinding surface of the grinding disc is first flush with the first positioning surface, so that the corresponding keyway of the template is placed on the ear shaft, and the grinding disc can grind the positioning protrusions used to repair the transverse surface of the keyway so that multiple positioning protrusions are in the same plane, and then the grinding assembly is adjusted so that the grinding surface of the grinding disc is flush with the second positioning surface. At this time, the corresponding keyway of the template is placed on the ear shaft, and the first positioning surface is supported on multiple polished positioning protrusions, so that the grinding disc grinds the positioning protrusions used to repair the vertical surface of the keyway. At this time, the surface formed on the top of the positioning protrusion completed by the two previous grindings has the same positional relationship with the first positioning surface and the second positioning surface of the template. The first positioning surface and the second positioning surface are set according to the shape of the keyway, so that the keyway can be accurately repaired even if the transverse surface and the vertical surface of the keyway are worn.

[0011] Preferably, a mounting frame is slidably mounted on the sliding frame, and the sliding direction of the mounting frame on the sliding frame is inclined to the first positioning surface and the second positioning surface. A shell for mounting a grinding assembly is rotatably mounted on the mounting frame, and a telescopic shaft for driving the grinding disc to rotate is disposed on the grinding disc, the telescopic shaft is perpendicular to the grinding surface of the grinding disc, and the telescopic shaft is rotatably disposed on the shell.

[0012] The effect is that the sliding direction of the mounting frame on the sliding frame is inclined to the first positioning surface and the second positioning surface. When adjusting the position of the grinding disc, the position of the mounting frame is first moved to allow the mounting frame to drive the grinding disc to move. At this time, the edge of the grinding disc is close to the angle position of the keyway, and then the length of the telescopic shaft is adjusted to gradually make the grinding disc flush with the first positioning surface or the second positioning surface, so that the grinding assembly can accurately grind each positioning protrusion to avoid incomplete grinding of some positioning protrusions due to improper adjustment of the grinding disc, thereby causing size deviation of the repaired keyway.

[0013] Preferably, the telescopic shaft comprises a sleeve, a center shaft, a locking sleeve and a clamping block, the sleeve is rotatably arranged on the shell, the center shaft is inserted into one end of the sleeve, the locking sleeve is threadedly connected to the outer wall of one end of the sleeve plugged into the center shaft, the clamping block is slidably connected to the sleeve along the radial direction of the sleeve, and the locking sleeve has a tapered portion inside, and the clamping block is squeezed on the outer wall of the center shaft through the tapered portion.

[0014] Preferably, a driving bevel gear is rotatably arranged in the mounting frame, the rotation axis of the housing and the mounting frame and the center line of the driving bevel gear coincide with each other, a driven bevel gear is coaxially fixedly arranged on the telescopic shaft, and the driving bevel gear meshes with the driven bevel gear.

[0015] The effect is that the driven bevel gear meshes with the active bevel gear, and at the same time, the rotation axis of the housing and the mounting frame coincides with the center line of the active bevel gear. When the direction of the grinding surface of the grinding disc needs to be adjusted, the housing can be rotated, and the driven bevel gear can also revolve around the center line of the active bevel gear, thereby ensuring that the active bevel gear drives the grinding disc.

[0016] Preferably, a positioning assembly is provided at the rotational connection between the shell and the mounting frame, the positioning assembly includes a pin and a spring, the pin is slidably connected to the shell, a positioning hole for inserting the pin is opened on the mounting frame, two positioning holes are arranged at an interval of 90 degrees on the peripheral wall of the mounting frame rotationally connected to the shell, and the spring is sleeved on the pin to keep one end of the pin in the positioning hole.

[0017] Preferably, a worm wheel is coaxially fixedly arranged on the active bevel gear, a worm is rotatably arranged in the mounting frame, the worm is meshed with the worm wheel, and a driving motor for driving the worm to rotate is connected to the worm.

[0018] The effect is that the worm wheel is coaxially fixedly connected with the driving bevel gear, and the worm wheel is meshed with a worm. When the length direction of the telescopic shaft is adjusted, the telescopic shaft will not rotate due to the restriction of the worm wheel by the worm, which facilitates the adjustment of the length of the telescopic shaft.

[0019] Preferably, a template is detachably fixed to one end of the connecting rod, and another template is slidably provided on the other end of the connecting rod.

[0020] The effect is that when encountering ear shafts with different diameters, they can be replaced according to different sample plates made of the ear shafts, so that the grinding component can repair the keyways of ear shafts with different diameters, thereby improving adaptability.

[0021] Another template is slidably set at the other end of the connecting rod. When the two templates support the connecting rod, the support of the grinding assembly can be relatively stable. At the same time, the position between the two templates can be adjusted arbitrarily to ensure that the first positioning surfaces on the two templates can abut against the positioning protrusions.

[0022] Preferably, the positioning protrusion in the keyway is formed by spot welding with welding rods.

[0023] A method for repairing a trunnion wedge-shaped keyway of the present invention comprises the following steps:

[0024] Make a template according to the drawings of the trunnion and keyway, and install the connecting rod on the template;

[0025] Spot-weld a plurality of positioning protrusions on the transverse surface of the keyway, and then adjust the grinding surface of the grinding disc to be flush with the first positioning surface of the sample;

[0026] The sample is clamped in the keyway, and a plurality of positioning protrusions for repairing the cross surface of the keyway are polished by a polishing disc;

[0027] Then, spot weld a plurality of positioning protrusions on the vertical surface of the keyway, and then adjust the grinding surface of the grinding disc to be flush with the second positioning surface of the sample;

[0028] The template is clamped in the keyway again, and the first positioning surface is supported on the polished positioning protrusions, so that the polishing disc polishes the multiple positioning protrusions used to repair the keyway facade;

[0029] The repair material is applied to the surface to be repaired in the keyway, and the thickness of the repair material is limited according to the height of the positioning protrusion.

[0030] The effect is: first, a template is made according to the drawings of the ear shaft and the keyway, so that the shape of the template matches the keyway. When the first positioning surface is used to align the grinding surface of the grinding disk, the operation of the grinding disk can be facilitated. At the same time, the first positioning surface is abutted against the polished positioning protrusion, so that the grinding surface aligned with the second positioning surface can accurately grind the length of the positioning protrusion, so that when the thickness of the repair material is limited by the positioning protrusion, it is easy to ensure the accuracy of the size of the keyway.

[0031] Preferably, the step of limiting the thickness of the repair material according to the height of the positioning protrusion includes applying the repair material to a thickness exceeding the top of the positioning protrusion, and then placing the wedge key in the keyway, squeezing the repair material through the wedge key until the wedge key is supported on the positioning protrusion.

[0032] The effect is that by placing the wedge key in the keyway, the wedge key presses into the keyway to be repaired and squeezes out the excess repair material. When the wedge key is supported on the positioning protrusion, the wedge key squeezes the repair material out of the keyway with a relatively accurate size, thereby making the keyway formation more convenient.

[0033] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0034] The present invention installs the grinding disc of the grinding assembly on the sliding frame, and the grinding surface is first flush with the first positioning surface, so that the keyway corresponding to the template is placed on the ear shaft, and the grinding disc can grind the positioning protrusions for repairing the transverse surface of the keyway, so that multiple positioning protrusions are in the same plane, and then the first positioning surface is supported on multiple polished positioning protrusions, so that the grinding disc grinds the positioning protrusions for repairing the vertical surface of the keyway. At this time, the surface formed on the top of the positioning protrusion completed by the two previous grindings has the same positional relationship with the first positioning surface and the second positioning surface of the template, so that the keyway can still be accurately repaired even if the transverse surface and the vertical surface of the keyway are worn; the templates made for different ear shafts can also be replaced on the connecting rod more conveniently, so as to adapt to the keyway repair of ear shafts with different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a stereoscopic view of the trunnion after the keyway is repaired in an embodiment of the present invention;

[0036] Figure 2 is a front view of a sample in an embodiment of the present invention;

[0037] Figure 3 Schematic diagram of the use state of the trunnion wedge keyway repairing device in an embodiment of the present invention;

[0038] Figure 4 is a side view of a device for repairing a trunnion wedge-to-keyway position in an embodiment of the present invention;

[0039] Figure 5 is a schematic diagram of the connection structure of the telescopic shaft in an embodiment of the present invention;

[0040] Figure 6 is a schematic diagram of the connection structure of the latch in an embodiment of the present invention;

[0041] Figure 7 is a schematic structural diagram of a telescopic shaft in an embodiment of the present invention;

[0042] Figure 8 yes Figure 7 A partial enlarged view of part A.

[0043] Reference numerals:

[0044] 1. ear shaft; 11. transverse surface; 12. vertical surface; 13. positioning protrusion; 2. template; 21. arc portion; 22. positioning portion; 23. first positioning surface; 24. second positioning surface; 25. mounting hole; 3. connecting rod; 31. nut; 4. sliding frame; 41. straight rail portion; 42. guide hole; 5. mounting frame; 51. knob; 6. grinding assembly; 61. grinding disc; 62. telescopic shaft; 621. sleeve; 622. center axis; 623. locking sleeve; 624. clamping block; 625. conical portion; 63. driving motor; 64. worm; 65. worm wheel; 66. housing; 67. active bevel gear; 68. driven bevel gear; 7. positioning assembly; 71. latch; 72. spring; 73. positioning hole. DETAILED DESCRIPTION

[0045] Combine the following Figures 1 to 8 Embodiments of the present invention are described in detail, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0046] refer to Figure 1 The ear shaft 1 has a wedge-shaped keyway that has been repaired. The wedge-shaped keyway has a transverse surface 11 and a vertical surface 12. The transverse surface 11 and the vertical surface 12 have multiple positioning protrusions 13 for repairing the keyway. The top surface of the positioning protrusion 13 in the transverse surface 11 is flush with the transverse surface 11, and the top surface of the positioning protrusion 13 in the vertical surface 12 is flush with the vertical surface 12. The transverse surface 11 and the vertical surface 12 are formed by applying a repair material on the surface that needs to be repaired in the keyway, and the repair material can be selected from Sore polymer carbon nanopolymer.

[0047] This embodiment discloses a device for repairing the key slot of the trunnion wedge. Figure 2 As shown, the template 2 includes a circular arc portion 21 and a positioning portion 22. The circular arc portion 21 is an arc-shaped as a whole. The radius of the arc formed by the inner side of the circular arc portion 21 is equal to the radius of the outer wall of the ear shaft 1. The positioning portion 22 is located in the middle of the circular arc portion 21. The positioning portion 22 is formed integrally with the circular arc portion 21. The positioning portion 22 has a first positioning surface 23 and a second positioning surface 24. The shape of the positioning portion 22 is the shape of the cross section of the keyway. The first positioning surface 23 is used to locate the size during the formation of the transverse surface 11, and the second positioning surface 24 is used to locate the size during the formation of the vertical surface 12. The production process of the template 2 can be processed according to the drawing dimensions of the ear shaft 1 and the keyway. Multiple templates 2 can be produced. In this embodiment, at least two templates 2 are provided.

[0048] refer to Figure 3 A connecting rod 3 is arranged between the two templates 2. The connecting rod 3 is arranged perpendicular to the template 2. The two templates 2 are provided with mounting holes 25. Two mounting holes 25 are provided on each template 2. At the same time, the connecting rod 3 is connected to the template 2 through the mounting holes 25, so that the two connecting rods 3 between the two templates 2 are arranged in parallel. When in use, the two templates 2 are placed on the ear shaft 1, so that the positioning part 22 of the template 2 is in the keyway. Since the positioning part 22 is arranged according to the size of the keyway, the positioning part 22 can be completely located in the keyway, and the inner side of the arc part 21 abuts against the outer side wall of the ear shaft 1. The connecting rod 3 connected to the two templates 2 is parallel to the center line of the ear shaft 1. In this embodiment, a nut 31 is threadedly connected to one end of the connecting rod 3, and one template 2 is fixedly connected to the end of the connecting rod 3 through the nut 31, and the other template 2 is slidably connected to the connecting rod 3 through the mounting hole 25. When the ear shaft 1 of different diameters needs to be repaired, the template 2 can be replaced by removing the nut 31.

[0049] refer to Figure 3 and Figure 4 A sliding frame 4 is mounted on the two connecting rods 3. The middle part of the sliding frame 4 is a straight rail portion 41. The length direction of the straight rail portion 41 is a straight line. A mounting frame 5 is slidably mounted on the straight rail portion 41 of the sliding frame 4. The mounting frame 5 can slide along the length direction of the straight rail portion 41. At the same time, guide holes 42 are opened at both ends of the sliding frame 4. The sliding frame 4 is slidably connected to the two connecting rods 3 through the guide holes 42. A grinding assembly 6 is arranged on the mounting frame 5. The grinding assembly 6 includes a grinding disc 61. The grinding surface of the grinding disc 61 can be arranged flush with the first positioning surface 23 and the second positioning surface 24 on the mounting frame 5.

[0050] When repairing the ear shaft 1, first weld the positioning protrusion 13 used to repair the keyway transverse surface 11. The positioning protrusion 13 can be formed by spot welding the welding rod on the part of the ear shaft 1 that needs to be repaired. The height of the positioning protrusion 13 after spot welding should be higher than the height of the final formed transverse surface 11. Then adjust the grinding disc 61 and the first positioning surface 23 to be flush. Then place the template 2 on the ear shaft 1 and stagger it with the welded positioning protrusion 13. Start the grinding assembly 6, rotate the grinding disc 61, move the sliding frame 4 along the length direction of the connecting rod 3, and make the grinding disc 61 grind the positioning protrusion 13 so that the tops of multiple positioning protrusions 13 are in the same plane. After completing the grinding of the positioning protrusion 13 used to repair the transverse surface 11, remove the positioning protrusion 13 from the ear shaft. Remove the template 2 from the shaft 1, weld the positioning protrusions 13 for repairing the facade 12, then adjust the surface of the grinding disc 61 to be flush with the second positioning surface 24, and then connect the template 2 to the ear shaft 1. At the same time, support the first positioning surface 23 on the tops of the positioning protrusions 13 that have been polished on multiple transverse surfaces 11, so that the grinding disc 61 polishes the positioning protrusions 13 for repairing the facade 12, and then move the sliding frame 4 along the length direction of the connecting rod 3 so that the tops of the multiple positioning protrusions 13 for repairing the facade 12 are in the same plane. When the template 2 is initially placed on the ear shaft 1, the positioning protrusion 13 is not polished at this time. The positioning protrusion 13 supports the polishing disc 61, which makes it impossible for the template 2 to be accurately attached to the ear shaft 1. The polishing disc 61 can start polishing first, and then continue to press the template 2, so that during the polishing of the positioning protrusion 13 by the polishing disc 61, the template 2 is abutted against the side wall of the ear shaft 1 to limit the length of the polishing of the positioning protrusion 13, so that the positioning protrusion 13 reaches a suitable height. After completing the polishing of the positioning protrusion 13 twice, apply the repair material to the keyway to be repaired. The repair material should cover all the positioning protrusions 13, and then place the wedge key in the keyway. The wedge key squeezes and deforms the repair material. At the same time, the wedge key, under the support of multiple positioning protrusions 13, can make the repair material automatically form a horizontal surface 11 and a vertical surface 12, remove the extruded excess repair material, and after the repair material solidifies, the repair of the wedge keyway of the ear shaft 1 can be completed.

[0051] The grinding assembly 6 also includes a telescopic shaft 62, and the grinding disc 61 is fixed at one end of the telescopic shaft 62, and the telescopic shaft 62 is used to drive the grinding disc 61 to rotate. The length of the telescopic shaft 62 can be adjusted, so as to adjust the position of the grinding disc 61. The length direction of the straight rail portion 41 of the sliding frame 4 is inclined to the first positioning surface 23 and the second positioning surface 24, so that when the mounting frame 5 moves along the straight rail portion 41, the grinding disc 61 can have two directions perpendicular to the first positioning surface 23 and perpendicular to the second positioning surface 24. In combination with the extension and retraction of the telescopic shaft 62, the edge of the grinding disc 61 can be moved to the angle position between the first positioning surface 23 and the second positioning surface 24.

[0052] refer to Figure 4 and Figure 5 The mounting frame 5 is sleeved on the straight rail portion 41, and a knob 51 is threadedly connected on the side wall of the mounting frame 5. The end of the knob 51 is used to penetrate the mounting frame 5 and abut against the side wall of the straight rail portion 41. The mounting frame 5 is fixed to the sliding frame 4 by the knob 51. When the knob 51 is loosened, the position of the mounting frame 5 can be adjusted along the straight rail portion 41. A driving motor 63 is fixedly arranged on the mounting frame 5, and a worm 64 is coaxially fixedly arranged on the output shaft of the driving motor 63. At the same time, a worm gear 65 is rotatably arranged in the mounting frame 5, and the worm gear 65 is meshed with the worm 64. A housing 66 for mounting the telescopic shaft 62 is rotatably arranged on the mounting frame 5. The housing 66 coincides with the rotation axis of the mounting frame 5 and the rotation axis of the worm gear 65, and the rotation axis of the housing 66 and the mounting frame 5 is perpendicular to the surface of the template 2. A driving bevel gear 67 is coaxially fixedly arranged on the worm gear 65, and a driven bevel gear 68 is coaxially fixedly arranged on the telescopic shaft 62. The driving bevel gear 67 meshes with the driven bevel gear 68. The telescopic shaft 62 is rotatably connected to the housing 66, and the axis of the telescopic shaft 62 is perpendicular to the axis of the worm gear 65. When the grinding disc 61 needs to be rotated 90 degrees to adjust the grinding disc 61 from being flush with the first positioning surface 23 to being flush with the second positioning surface 24, the housing 66 should be rotated first, and the driven bevel gear 68 revolves around the center line of the driving bevel gear 67, so that the surface of the grinding disc 61 is parallel to the second positioning surface 24, and then the telescopic shaft 62 is cooperated to make the surface of the grinding disc 61 flush with the second positioning surface 24.

[0053] refer to Figure 5 and Figure 6 A positioning assembly 7 is provided at the rotational connection between the housing 66 and the mounting frame 5. The positioning assembly 7 includes a latch 71 and a spring 72. A positioning hole 73 is provided on the mounting frame 5. Two positioning holes 73 are provided on the peripheral wall of the rotational connection between the mounting frame 5 and the housing 66 at intervals of 90 degrees. The latch 71 is slidably connected to the housing 66. The end of the latch 71 is used to be inserted into the positioning hole 73. The spring 72 is sleeved on the latch 71, and one end of the spring 72 abuts against the latch 71 and the other end abuts against the housing 66. The force of the spring 72 is used to drive the latch 71 to maintain the connection with the positioning hole 73. When the housing 66 needs to be rotated, the latch 71 is taken out from the positioning hole 73. After the housing 66 is rotated 90 degrees, the latch 71 is automatically connected to the other positioning hole 73 under the force of the spring 72, so that the housing 66 can be accurately rotated 90 degrees, so that the grinding surface of the grinding disc 61 can be switched between two states parallel to the first positioning surface 23 or the second positioning surface 24.

[0054] refer to Figure 7 and Figure 8The telescopic shaft 62 includes a sleeve 621, a central shaft 622, a locking sleeve 623 and a clamping block 624. The sleeve 621 is rotatably connected to the housing 66, and the central shaft 622 is located in the sleeve 621. The central shaft 622 can be threadedly connected to the sleeve 621, or the central shaft 622 can be inserted into the sleeve 621. The locking sleeve 623 is threadedly connected to one end of the sleeve 621 connected to the central shaft 622, and cooperates with the outer thread of the sleeve 621. The inner wall of the locking sleeve 623 is provided with a tapered portion 625. The clamping block 624 is slidably connected to the side wall of the sleeve 621 along the radial direction of the sleeve 621, and the clamping block 624 is inside the locking sleeve 623. The clamping block 624 is used to abut against the tapered portion 625. When the locking sleeve 623 moves toward the sleeve 621, the clamping block 624 is pressed against the outer wall of the central shaft 622 through the tapered portion 625, so that the central shaft 622 is fixedly connected to the sleeve 621, and the sleeve 621 is coaxially fixedly connected to the driven bevel gear 68. When the locking sleeve 623 is loosened, the clamping block 624 can move on the outer wall of the sleeve 621, so that the clamping block 624 can loosen the fixation on the central shaft 622, so that the central shaft 622 can be adjusted in the sleeve 621, and the length of the telescopic shaft 62 can be adjusted, so that the grinding disc 61 installed on the central shaft 622 can be moved to a suitable position.

[0055] The present embodiment discloses a method for repairing a wedge-shaped keyway of an ear shaft, and the wedge-shaped keyway of an ear shaft 1 is repaired by using the above-mentioned ear shaft wedge-shaped keyway repairing device, which includes first making a template 2 according to the drawings of the ear shaft 1 and the keyway, and opening two mounting holes 25 on the template 2, and then connecting the connecting rod 3 to the template 2. The opening positions of the two mounting holes 25 should make the grinding surface of the grinding disk 61 parallel to the first positioning surface 23, and then spot-welding a plurality of positioning protrusions 13 on the transverse surface 11 of the keyway, and placing the template 2 at the keyway position of the ear shaft 1, so that the grinding disk 61 grinds the plurality of positioning protrusions 13 on the transverse surface 11, and at the same time, moving the grinding disk 61 along the length direction of the connecting rod 3 so that the tops of all the positioning protrusions 13 on the transverse surface 11 are in the same plane, removing the template 2, and then spot-welding a plurality of positioning protrusions 13 on the vertical surface 12 of the keyway, and loosening the latch 71 so that the shell 66 can Rotate the grinding disc 61 90 degrees to make the grinding disc 61 parallel to the second positioning surface 24, and adjust the length of the telescopic shaft 62 so that the grinding surface of the grinding disc 61 and the second positioning surface 24 are in the same plane; then place the template 2 on the ear shaft 1, and the first positioning surface 23 of the template 2 should abut the top of the positioning protrusion 13 that has been polished on the transverse surface 11. This process can be achieved by adjusting the distance between the two templates 2 to ensure that both templates 2 are supported on the positioning protrusion 13 of the transverse surface 11, and then polish the positioning protrusion 13 on the vertical surface 12; clean the debris inside the keyway, apply the repair material in the keyway, ensure that the depth of the repair material exceeds the positioning protrusion 13, and then place the wedge key in the keyway. The wedge key squeezes the repair material and supports on the positioning protrusion 13, clean up the excess repair material, and complete the repair of the keyway on the ear shaft 1 after the repair material solidifies.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for repairing the keyway of a trunnion wedge, characterized in that: include: The template comprises an arc portion and a positioning portion, wherein the inner diameter of the arc portion is equal to the outer wall radius of the ear shaft, the positioning portion is located in the inner middle of the arc portion, and the positioning portion has a first positioning surface and a second positioning surface perpendicular to each other; when the template is placed on the ear shaft, the arc portion abuts against the outer wall of the ear shaft, the positioning portion is located in the keyway, and the first positioning surface coincides with the transverse surface of the keyway and the second positioning surface coincides with the vertical surface of the keyway; A connecting rod is vertically fixed on the template, a sliding frame is slidably arranged on the connecting rod along the length direction of the connecting rod, and a grinding assembly is arranged on the sliding frame; The grinding assembly includes a grinding disk, which is used to grind the positioning protrusion for repairing the horizontal surface of the keyway when the grinding surface of the grinding disk is flush with the first positioning surface; when the direction of the grinding disk is adjusted so that the grinding surface of the grinding disk is flush with the second positioning surface, the first positioning surface is supported on the top of the polished positioning protrusion, and the grinding disk is used to grind the positioning protrusion for repairing the vertical surface of the keyway.

2. The device for repairing the keyway of the trunnion wedge according to claim 1, characterized in that: A mounting frame is slidably mounted on the sliding frame, and the sliding direction of the mounting frame on the sliding frame is inclined to the first positioning surface and the second positioning surface. A shell for mounting a grinding assembly is rotatably mounted on the mounting frame, and a telescopic shaft for driving the grinding disc to rotate is disposed on the grinding disc, the telescopic shaft is perpendicular to the grinding surface of the grinding disc, and the telescopic shaft is rotatably disposed on the shell.

3. The device for repairing the keyway of the trunnion wedge according to claim 2, characterized in that: The telescopic shaft includes a sleeve, a center shaft, a locking sleeve and a clamping block. The sleeve is rotatably arranged on the shell, the center shaft is inserted into one end of the sleeve, the locking sleeve is threadedly connected to the outer wall of one end of the sleeve plugged into the center shaft, the clamping block is slidably connected to the sleeve along the radial direction of the sleeve, and the locking sleeve has a tapered portion inside, and the clamping block is squeezed on the outer wall of the center shaft through the tapered portion.

4. The device for repairing the keyway of the trunnion wedge according to claim 2, characterized in that: A driving bevel gear is rotatably arranged in the mounting frame, the rotation axis of the housing and the mounting frame and the center line of the driving bevel gear coincide with each other, a driven bevel gear is coaxially fixedly arranged on the telescopic shaft, and the driving bevel gear meshes with the driven bevel gear.

5. The device for repairing the keyway of the trunnion wedge according to claim 4, characterized in that: A positioning assembly is provided at the rotational connection between the shell and the mounting frame, and the positioning assembly includes a latch and a spring. The latch is slidably connected to the shell, and a positioning hole for inserting the latch is opened on the mounting frame. Two positioning holes are arranged at a 90-degree interval on the peripheral wall of the mounting frame rotationally connected to the shell. The spring is sleeved on the latch to keep one end of the latch in the positioning hole.

6. The device for repairing the keyway of the trunnion wedge according to claim 4, characterized in that: A worm wheel is coaxially fixedly arranged on the active bevel gear, a worm is rotatably arranged in the mounting frame, the worm is meshed with the worm wheel, and a driving motor for driving the worm to rotate is connected to the worm.

7. The device for repairing the keyway of the trunnion wedge according to claim 1, characterized in that: A template is detachably fixed on one end of the connecting rod, and another template is slidably arranged on the other end of the connecting rod.

8. The device for repairing the keyway of the trunnion wedge according to claim 1, characterized in that: The positioning protrusion in the keyway is formed by spot welding with welding rods.

9. A method for repairing a trunnion wedge-shaped keyway, using a trunnion wedge-shaped keyway repairing device as claimed in any one of claims 1 to 8 to repair the wedge-shaped keyway, characterized in that: The steps include: Make a template according to the drawings of the trunnion and keyway, and install the connecting rod on the template; Spot weld a plurality of positioning protrusions on the transverse surface of the keyway, and then adjust the grinding surface of the grinding disc to be flush with the first positioning surface of the sample; The template is clamped in the keyway, and a plurality of positioning protrusions for repairing the cross surface of the keyway are polished by a polishing disc; Then, spot weld a plurality of positioning protrusions on the vertical surface of the keyway, and then adjust the grinding surface of the grinding disc to be flush with the second positioning surface of the sample; The template is clamped in the keyway again, and the first positioning surface is supported on the polished positioning protrusions, so that the polishing disc polishes the multiple positioning protrusions used to repair the keyway facade; The repair material is applied to the surface to be repaired in the keyway, and the thickness of the repair material is limited according to the height of the positioning protrusion.

10. The method for repairing the trunnion wedge keyway according to claim 9, characterized in that: The step of limiting the thickness of the repair material according to the height of the positioning protrusion includes applying the repair material to a thickness exceeding the top of the positioning protrusion, then placing the wedge key in the keyway, and squeezing the repair material through the wedge key until the wedge key is supported on the positioning protrusion.

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