A combined drilling and reaming tool applicable to the machining of the coupling pin holes of a main pump

Abstract

The present disclosure belongs to the field of nuclear power technology, and specifically relates to a co-drilling and reaming tool suitable for processing the pin holes of the main pump coupling. The present disclosure adopts a group drilling structure to process and repair the pin holes according to the characteristics of the pin holes of the main pump coupling, that is, according to the distribution of the pin holes of the coupling, multiple drill bit assemblies are arranged, and a rotary assembly is used to drive the multiple drill bit assemblies to rotate synchronously, and then cooperate with the screw feed, so that multiple pin holes on one side of the coupling can be processed and repaired at the same time, which can greatly improve the processing efficiency. In addition, the cooperation of the drilling template assembly and the support assembly can not only enhance the alignment accuracy and connection stability of the coupling to be processed and the detachable shaft, but also guide the axial stable movement of multiple drill bits, effectively avoiding drill bit deflection, thereby improving the processing quality and shortening the maintenance cycle.

Description

Technical Field

[0001] The present invention belongs to the technical field of nuclear power operation and maintenance, and particularly relates to a co-drilling and reaming tool applicable to the machining of the pin holes of a main pump coupling. Background Art

[0002] As the only rotating equipment in the main equipment of the nuclear island, the nuclear power main pump operates in an environment of high temperature, high pressure and high-level radioactive medium for a long time, and repeatedly bears the thermal shock and mechanical shock of the primary coolant, so the reliability requirements for key components such as the hydraulic components and couplings of the main pump are extremely high.

[0003] According to the maintenance experience of the main pump in nuclear power plants and the research on the vibration mechanism of the main pump, the coaxiality between the detachable shaft and the coupling of the main pump seriously affects the vibration characteristics of the main pump. During the operation of a certain nuclear power plant, abnormal vibration of the main pump was found many times, and during the subsequent maintenance of the main pump, the situation of strain and burrs on the mating pins and pin holes between the detachable shaft of the main pump and the upper and lower couplings occurred many times. When the degree of strain is relatively light, the treatment method is to grind the pin holes and cylindrical pins online; when the damage is relatively serious, in order to ensure the clearance between the cylindrical pin and the pin hole, co-drilling and reaming and pin matching work need to be carried out. When the whole motor is replaced, co-drilling and reaming work also needs to be carried out to ensure interchangeability.

[0004] At present, the main tool of the original co-drilling and reaming tool in nuclear power plants is a magnetic drill, which is used for machining pin holes in cooperation with a long shaft. It can only machine one pin hole at a time, and has problems such as heavy equipment, inconvenient operation, complex adjustment, unstable machining quality and low efficiency. Therefore, how to reduce the on-site operation difficulty and improve the machining efficiency has become an urgent problem to be solved. Summary of the Invention

[0005] In order to overcome the problems existing in the related art, a co-drilling and reaming tool applicable to the machining of the pin holes of a main pump coupling is provided.

[0006] According to one aspect of the embodiments of the present disclosure, a co-drilling and reaming tool applicable to the machining of the pin holes of a main pump coupling is provided. The co-drilling and reaming tool applicable to the machining of the pin holes of a main pump coupling sequentially includes, from bottom to top: a drill template assembly, a rotary assembly, and a support assembly. Among them, the lower flange at the lower end of the detachable shaft to be machined is located on the coupling flange of the coupling to be machined, the threaded holes of the lower flange are aligned with the threaded holes of the coupling flange, and the pin holes of the lower flange are aligned with the pin holes of the coupling flange;

[0007] The drill template assembly includes: a plurality of screw rod support structures, a drill template, and a plurality of drill sleeves;

[0008] Each screw rod support structure is connected through the drill template. The part of each screw rod support structure located below the drill template is a stud. The stud of each screw rod support structure is threadedly connected in a threaded hole of a lower flange and a threaded hole of a coupling flange to fixedly connect the detachable shaft and the coupling. The top of each screw rod support structure is fixedly connected with a first bearing;

[0009] A plurality of U-shaped grooves are radially formed at the edge of the drill template. Each U-shaped groove is fixedly connected with an annular drill bushing. The hollow part of each drill bushing faces a pin hole of the lower flange;

[0010] The rotary assembly includes: a plurality of drill bit assemblies, a rotary disk, a plurality of screw rod nuts, a rotary support, a first drive assembly, a worm, a support ring, a plurality of bearing assemblies, and a plurality of gear shafts;

[0011] The rotary support is annular. A plurality of first through holes are axially formed in the rotary support. The plurality of screw rod nuts are connected to the rotary support;

[0012] Each gear shaft is connected in a first through hole through a bearing assembly. Each gear shaft is fixedly connected to the upper end of a drill bit assembly. The drill bit at the lower end of each drill bit assembly faces the hollow part of a drill bushing;

[0013] A first groove surrounding the rotary support in the radial direction is formed on the side surface of the rotary support. A through hole is radially formed at the adjacent position of each first through hole and the first groove to penetrate the first through hole and the first groove. The rotary disk is arranged in the first groove;

[0014] The support ring is arranged on the lower surface of the inner wall of the first groove. An annular second groove is axially formed on the lower surface of the rotary disk. The support ring is in clearance fit in the second groove;

[0015] The outer ring of the rotary disk is a worm gear structure. The worm gear structure meshes with the worm. The inner ring of the rotary disk is a straight gear structure. The straight gear structure meshes with each gear shaft through each through hole. The worm is connected to the first drive assembly. The first drive assembly can drive the worm to rotate, thereby driving the rotary disk to rotate, and further driving the drill bits of the plurality of drill bit assemblies to rotate synchronously;

[0016] The support assembly includes: a plurality of screw rods, a support plate, and a second drive assembly;

[0017] The support plate is fixedly connected to the top of the upper flange at the upper end of the detachable shaft. The second drive assembly is fixedly connected to the support plate. The second drive assembly includes a plurality of output ends. Each output end is connected to the upper end of a screw rod. Each screw rod is perpendicular to the end face of the upper flange;

[0018] The support plate is axially provided with a plurality of second through holes, each second through hole is aligned with a threaded hole of the upper flange, each lead screw passes through a second through hole and the threaded hole corresponding to the second through hole, and is threadedly connected to a lead screw nut. The bottom end of each lead screw is fixedly connected to the inner ring of a first bearing at the top end of a lead screw support structure;

[0019] The second driving assembly can drive the plurality of lead screws to rotate synchronously, so as to drive the rotary assembly to move axially;

[0020] When each drill bit is driven to rotate and the rotary assembly is driven to move downward, each drill bit can pass through the corresponding drill bushing to process the pin hole below the drill bushing.

[0021] In a possible implementation manner, the support assembly further includes: a plurality of guide rods, the rotary assembly further includes: linear bearings, and the drill template assembly further includes: guide rod support structures;

[0022] The plurality of linear bearings are connected to the rotary bracket;

[0023] Each guide rod support structure is connected through the drill template. The part of each guide rod support structure located below the drill template is a stud, and the stud of each guide rod support structure is threadedly connected to a threaded hole of a lower flange and a threaded hole of a coupling flange;

[0024] The upper ends of the plurality of guide rods are fixedly connected to the support plate. Each guide rod is perpendicular to the end face of the upper flange. Each guide rod passes through the inner ring of a linear bearing, and the bottom end of the guide rod is fixedly connected to the top end of a guide rod support structure. The rotary assembly can move axially along the plurality of guide rods.

[0025] In a possible implementation manner, each bearing assembly includes a second bearing and a third bearing;

[0026] For each first through hole, the outer ring of a second bearing is fixedly connected to the upper end inner wall of the first through hole, the outer ring of a third bearing is fixedly connected to the lower end inner wall of the first through hole, the inner ring of the second bearing is in interference fit with the upper end of the gear shaft in the first through hole, and the inner ring of the third bearing is in interference fit with the lower end of the gear shaft.

[0027] In a possible implementation manner, the axial cross-section of the support ring is trapezoidal.

[0028] In a possible implementation manner, the rotary assembly further includes: a plurality of rollers.

[0029] The upper surface of the inner wall of the first groove is connected with a plurality of rollers. An annular third groove is axially formed on the upper surface of the rotary disk. The plurality of rollers are sequentially located in the third groove, and the lower ends of the rollers press against the bottom end of the inner wall of the third groove.

[0030] In a possible implementation manner, the axial cross-section of each roller is an inverted trapezoid.

[0031] In a possible implementation manner, each screw rod support structure has a flange flat square structure at the position above the drill template.

[0032] Each guide rod support structure has a flange flat square structure at the position above the drill template.

[0033] In a possible implementation manner, the drill template assembly further includes: a plurality of drill bushing supports.

[0034] Each drill bushing support is a tubular structure. Each drill bushing support is fixedly connected to the edge of a U-shaped groove through wing-shaped connecting pieces extending radially on both sides. There is a preset gap between the outer side of each drill bushing support and the edge of the U-shaped groove.

[0035] In a possible implementation manner, the support assembly further includes: a plurality of clamping devices.

[0036] The tops of the plurality of clamping devices are fixedly connected to the lower end of the support plate.

[0037] Each clamping device can be in interference fit in a pin hole of the upper flange, so that the support plate is fixedly connected to the top of the upper flange at the upper end of the detachable shaft.

[0038] In a possible implementation manner, the same drill reaming tool for machining the pin holes of the main pump coupling further includes: a control device.

[0039] The control device establishes a communication connection with the first driving component and the second driving component, and the control device can control the first driving component and the second driving component to start working or stop working.

[0040] The beneficial effects of the present disclosure are as follows: According to the characteristics of the pin holes of the main pump coupling, the present disclosure uses a group drilling structure for machining and repairing the pin holes, that is, according to the distribution of the coupling pin holes, a plurality of drill bit assemblies are set, and a rotary assembly is used to drive the plurality of drill bit assemblies to rotate synchronously, and then combined with the screw rod feed, the plurality of pin holes on one side of the coupling can be machined and repaired simultaneously, which can greatly improve the machining efficiency. In addition, the cooperation between the drill template assembly and the support assembly can not only strengthen the alignment accuracy and connection stability of the coupling to be machined and the detachable shaft, but also guide the axial stable movement of the plurality of drill bits, effectively avoiding the deviation of the drill bits, thereby improving the machining quality and shortening the maintenance cycle. Description of the Drawings

[0041] Figure 1 It is a schematic diagram of a co-drilling and reaming tool applicable to the machining of the pin holes of the main pump coupling shown according to an exemplary embodiment.

[0042] Figure 2 It is a schematic diagram of a co-drilling and reaming tool applicable to the machining of the pin holes of the main pump coupling shown according to an exemplary embodiment.

[0043] Figure 3 It is a schematic diagram of the connection between a detachable shaft and a coupling in an application example.

[0044] Figure 4 It is a schematic diagram of a drill template assembly shown according to an exemplary embodiment.

[0045] Figure 5 It is a schematic diagram of a rotary assembly shown according to an exemplary embodiment.

[0046] Figure 6 It is a schematic diagram of a partial section of a rotary assembly shown according to an exemplary embodiment.

[0047] Figure 7 It is a schematic diagram of a partial section of a rotary assembly shown according to an exemplary embodiment.

[0048] Figure 8 It is a schematic diagram of a support assembly shown according to an exemplary embodiment. Detailed implementation manners

[0049] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Figure 3 It is a schematic diagram of the connection between a detachable shaft and a coupling in an application example. As Figure 3 shown, before machining the pin holes of the main pump coupling, it is necessary to install the detachable shaft 2 of the main pump onto the coupling 1. The detachable shaft 2 and the coupling 1 are integrally arranged in a vertical installation structure, and the coaxiality of the pin hole 202 of the detachable shaft 2 and the pin hole (not shown in the figure) of the coupling 1 is adjusted, and the coaxiality of the threaded hole 201 of the detachable shaft 2 and the threaded hole (not shown in the figure) of the coupling 1 is adjusted to meet the machining process requirements.

[0051] Figure 1 and Figure 2 It is a schematic diagram of a co-drilling and reaming tool applicable to the machining of the pin holes of the main pump coupling shown according to an exemplary embodiment. As Figure 1 and Figure 2As shown in the figure, the co-drilling and reaming tool applicable to the machining of the pin holes of the main pump coupling includes three parts: a support assembly 5, a rotary assembly 4, and a drill template assembly 3. Among them, the drill template assembly 3 is arranged on the lower flange of the detachable shaft 2, the rotary assembly 4 is arranged above the drill template assembly 3, and the support assembly 5 is arranged above the rotary assembly 4.

[0052] Figure 4 is a schematic diagram of a drill template assembly shown according to an exemplary embodiment. As Figure 4 shown, the drill template assembly includes: a plurality of lead screw support structures 301, a plurality of guide rod support structures 306, a drill template 303, and a plurality of drill bushings 305;

[0053] Each lead screw support structure 301 is connected through the drill template 303. The part of each lead screw support structure 301 located below the drill template 303 is a stud. The relative positions between the lead screw support structures 301 are adapted to the relative positions of the threaded holes on the lower flange of the detachable shaft, so that the stud of each lead screw support structure 301 can be threadedly connected to a threaded hole on the lower flange and a threaded hole on a coupling flange. The top of each lead screw support structure 301 is fixedly connected to a first bearing. A plurality of U-shaped grooves are radially formed along the edge of the drill template 303, and each U-shaped groove is fixedly connected to an annular drill bushing 305. The hollow part of each drill bushing 305 faces a pin hole on the lower flange. In this way, the structure of the drill template assembly can not only effectively fix the drill template assembly and form a positioning reference for the entire co-drilling and reaming tool applicable to the machining of the pin holes of the main pump coupling, but also effectively fix the connection between the detachable shaft and the coupling.

[0054] In a possible implementation, each lead screw support structure has a flange flat square structure at the position above the drill template; when installing each lead screw support structure, the flange flat square structure can be screwed by a wrench, and the flange flat square structure can be made to press the drill template to further strengthen the connection between the drill template and the lower flange.

[0055] In a possible implementation, as Figure 4 shown, the drill template 303 assembly further includes: a plurality of drill bushing supports 304; each drill bushing support 304 is a tubular structure. Each drill bushing support 304 is fixedly connected to the edge of a U-shaped groove through wing-shaped connecting pieces extending radially on both sides. There is a preset gap between the outside of each drill bushing support and the edge of the U-shaped groove. The distance between the drill bushing support and the edge of the U-shaped groove can be adjusted according to the position deviation of the pin hole of the detachable shaft. For example, a plurality of threaded holes can be opened on both edges of the U-shaped groove, and a plurality of threaded holes can also be opened on each wing-shaped connecting piece. The distance between the drill bushing support and the edge of the U-shaped groove can be adjusted by screwing the screws into different threaded holes on the edge of the U-shaped groove and the wing-shaped connecting piece. Thus, the drill template assembly can more flexibly adapt to the position deviation of the pin hole of the detachable shaft.

[0056] Figure 5 It is a schematic diagram of a slewing assembly shown according to an exemplary embodiment. Figure 6 It is a schematic diagram of a partial cross-section of a slewing assembly shown according to an exemplary embodiment. Figure 7 It is a schematic diagram of a partial cross-section of a slewing assembly shown according to an exemplary embodiment. As Figures 5 to 7 shown, the slewing assembly includes: a plurality of drill bit assemblies, a slewing disk 403, a plurality of lead screw nuts 404, a slewing bracket 405, a first drive assembly 408, a worm 409, a support ring 410, a plurality of bearing assemblies, and a plurality of gear shafts 413;

[0057] As Figures 5 to 7 shown, the slewing bracket 405 is annular, the slewing bracket 405 is provided with a plurality of first through holes along the axial direction, and a plurality of lead screw nuts 404 are connected to the slewing bracket 405; each gear shaft 413 is connected to a first through hole through a bearing assembly, each gear shaft 413 is fixedly connected to the upper end of a drill bit assembly, each drill bit assembly includes a floating chuck 402 and a drill bit 401, the upper end of each floating chuck 402 is key-connected to the gear shaft 413 through a flat key 418, and the lower end of each floating chuck 402 is connected to the drill bit. The drill bit 401 at the lower end of each drill bit assembly is aligned with the hollow part of a drill bushing 305, and each drill bushing 305 can guide the axial movement of the drill bit 401 for machining the corresponding pin hole, effectively preventing the drill bit 401 from generating an offset during the axial movement.

[0058] A first groove surrounding the slewing bracket 405 is provided along the radial direction on the side surface of the slewing bracket 405, and a through hole is provided along the radial direction at the adjacent position of each first through hole and the first groove to penetrate the first through hole and the first groove, and the slewing disk 403 is arranged in the first groove; a support ring 410 is arranged on the lower surface of the inner wall of the first groove, a second annular groove is provided along the axial direction on the lower surface of the slewing disk 403, and the support ring 410 is in clearance fit in the second groove;

[0059] The outer ring of the slewing disk 403 is a worm gear structure, the worm gear structure meshes with the worm 409, the inner ring of the slewing disk 403 is a straight gear structure, the straight gear structure meshes with each gear shaft 413 through each through hole, the worm 409 can be arranged in a worm gear box 407, the worm 409 is connected to the first drive assembly 408 (for example, the first drive assembly can be a motor), the first drive assembly 408 can drive the worm 409 to rotate, thereby driving the slewing disk 403 to rotate, and further driving the drill bits 401 of a plurality of drill bit assemblies to rotate synchronously;

[0060] In a possible implementation manner, as Figure 7As shown, the upper end of the slewing support 405 is fixedly connected to the upper end cover 415, and the lower end of the slewing support 405 is fixedly connected to the lower end cover 411. The upper end of each gear shaft 413 is fixedly connected to a central end cover 416 by screws 417.

[0061] In a possible implementation, the axial cross-section of the support ring is trapezoidal to reduce the friction between the support ring and the slewing disc.

[0062] In a possible implementation, as Figure 6 and Figure 7 shown, the slewing assembly further includes: a plurality of rollers 419. The upper surface of the inner wall of the first groove is connected to a plurality of rollers 419. An annular third groove is axially formed on the upper surface of the slewing disc 403. The plurality of rollers 419 are sequentially located in the third groove, and the lower ends of the rollers 419 press against the bottom end of the inner wall of the third groove. In this way, the slewing disc 403 is supported and pressed by the rollers 419 and the support ring 410 together, realizing the positioning and slewing support of the slewing disc 403 on the slewing support 405.

[0063] In a possible implementation, the axial cross-section of each roller is an inverted trapezoid.

[0064] In a possible implementation, as Figure 6 and Figure 7 shown, each bearing assembly includes a second bearing 414 and a third bearing 412; for each first through-hole, the outer ring of a second bearing is fixedly connected to the upper end of the inner wall of the first through-hole, and the outer ring of a third bearing is fixedly connected to the lower end of the inner wall of the first through-hole. The inner ring of the second bearing is in interference fit with the upper end of the gear shaft 413 in the first through-hole, and the inner ring of the third bearing is in interference fit with the lower end of the gear shaft 413.

[0065] In a possible implementation, the second bearing can be a roller bearing, and the third bearing can be an angular contact bearing.

[0066] Figure 8 is a schematic diagram of a support assembly shown according to an exemplary embodiment. As Figure 8 shown, the support assembly includes: a plurality of lead screws 502, a support plate 505, and a second drive assembly 503; the support plate 505 is fixedly connected to the top of the upper flange at the upper end of the detachable shaft. For example, the support assembly further includes: a plurality of clamping devices 504. The tops of the plurality of clamping devices 504 are fixedly connected to the lower end of the support plate 505; each clamping device can be in interference fit in a pin hole of the upper flange so that the support plate is fixedly connected to the top of the upper flange at the upper end of the detachable shaft.

[0067] In a possible implementation, multiple through holes are opened axially on the support plate 505 according to the size and distribution of the bolt holes and pin holes of the detachable shaft, and concentric hard non-metallic contour pads are installed at the bottom of the through holes corresponding to the bolt holes of the detachable shaft to prevent the flange surface from being crushed.

[0068] The second drive assembly 503 is fixedly connected to the support plate 505, and the second drive assembly 503 includes a plurality of output ends, each of which is connected to the upper end of a screw rod 502, and each screw rod 502 is perpendicular to the end surface of the upper flange;

[0069] For example, the second drive assembly 503 may include a motor, a gear box 509, an input gear 506, multiple transition gears 507 and multiple output gears 508. The input gear 506, multiple transition gears 507 and multiple output gears 508 are arranged in the gear box 509. The input gear 506 is connected to the output end of the motor, each transition gear 507 is meshed with the input gear 506, each output gear 508 is meshed with a transition gear 507, and each output gear 508 is connected to the upper end of a screw rod 502. The motor can drive the input gear 506 to rotate, thereby driving the transition gear 507 and the output gear 508 to rotate synchronously, thereby driving the multiple screw rods 502 to rotate synchronously.

[0070] The support plate 505 is provided with a plurality of second through holes along the axial direction, each of which is directly opposite to a threaded hole of the upper flange, each screw rod 502 passes through a second through hole and a threaded hole corresponding to the second through hole, and is threadedly connected with a screw rod nut 404, and the bottom end of each screw rod 502 is fixedly connected to the inner ring of the first bearing at the top end of a screw rod support structure 301. In a possible implementation, the elastic sleeve 302 can be interference-fitted in the inner ring of the first bearing, for example, the elastic sleeve can be used to limit the bearing by an elastic retaining ring; the inner hole of the elastic sleeve is used to install the screw rod, and the elastic structure of the elastic sleeve can be compressed by tightening a plurality of locking screws at the upper end of the elastic sleeve, so that the elastic sleeve hugs the optical axis section of the screw rod, thereby realizing axial fixation of the lower end of the screw rod;

[0071] The second driving assembly can drive the multiple screw rods to rotate synchronously, thereby driving the rotary assembly to move axially;

[0072] In a possible implementation, the support assembly further includes: a plurality of guide rods 501, the rotary assembly further includes: a linear bearing 406, and the drilling template 303 assembly further includes: a guide rod support structure 306;

[0073] like Figure 4 , Figure 6 and Figure 8As shown in the figure, a plurality of linear bearings 406 are connected to the rotary bracket 405; each guide rod support structure 306 is connected to the drill template 303 in a penetrating manner. The part of each guide rod support structure 306 located below the drill template 303 is a stud, and the stud of each guide rod support structure 306 is threadedly connected to a threaded hole of a lower flange and a threaded hole of a coupling flange; the upper ends of a plurality of guide rods 501 are fixedly connected to the support plate 505, each guide rod 501 is perpendicular to the end face of the upper flange, each guide rod 501 passes through the inner ring of a linear bearing 406, and the bottom end of the guide rod 501 is fixedly connected to the top end of a guide rod support structure 306. The rotary assembly can move axially along the plurality of guide rods 501. In this way, the plurality of guide rods 501 can guide the rotary assembly and increase the stability of the rotary assembly during movement.

[0074] In a possible implementation, as Figure 4 shown in the figure, the upper end of the guide rod support structure 306 is the tapered section of an elastic shaft structure with a tapered surface groove. The inner hole is used to install the optical shaft section at the lower end of the guide rod. The inner wall below the tapered section is cylindrical, and the cylindrical inner wall has a threaded structure. The guide rod support structure 306 further includes a compression nut 307. The inner wall of the compression nut 307 is an inverted tapered surface structure. The compression nut 307 is sleeved on the outside of the upper end of the guide rod support structure 306. Rotate the compression nut 307 to move downward. The inverted tapered surface of the compression nut 307 gradually squeezes the tapered surface structure of the guide rod support structure 306, so that the grooved elastic shaft structure tightly holds the inserted optical shaft section of the guide rod to realize the fixation of the guide rod.

[0075] In a possible implementation, the position of each guide rod support structure above the drill template has a flange flat structure. When installing each guide rod support structure, the flange flat structure of the guide rod support structure can be screwed by a wrench, and the flange flat structure can be made to press the drill template.

[0076] In a possible implementation, the same drill reaming tool for machining the main pump coupling pin hole further includes: a control device; the control device establishes a communication connection with the first driving component and the second driving component (such as wired communication or wireless communication, which is not limited in this disclosure), and the control device can control the first driving component and the second driving component to start working or stop working. The first driving component can be controlled by the control device to drive each drill bit to rotate, and the second driving component can be controlled by the control device to drive a plurality of lead screws to rotate, so that the rotary assembly is driven to move downward, and each drill bit can pass through the corresponding drill bushing to machine the pin hole below the drill bushing.

[0077] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements to the technologies in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A co-drilling and reaming tool applicable to the machining of the pin holes of the main pump coupling, characterized in that, The co-drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump successively includes, in order from bottom to top: a drill template assembly, a rotary assembly, and a support assembly. Among them, the lower flange at the lower end of the detachable shaft to be machined is located on the coupling flange of the coupling to be machined. The threaded holes of the lower flange are aligned with the threaded holes of the coupling flange, and the pin holes of the lower flange are aligned with the pin holes of the coupling flange. The drill template assembly includes: a plurality of screw rod support structures, a drill template, and a plurality of drill bushings. Each screw rod support structure is connected through the drill template. The part of each screw rod support structure located below the drill template is a stud. The stud of each screw rod support structure is threadedly connected in a threaded hole of a lower flange and a threaded hole of a coupling flange to fixedly connect the detachable shaft and the coupling. The top of each screw rod support structure is fixedly connected with a first bearing. A plurality of U-shaped grooves are radially formed on the edge of the drill template. Each U-shaped groove is fixedly connected with an annular drill bushing, and the hollow part of each drill bushing faces a pin hole of the lower flange. The rotary assembly includes: a plurality of drill bit assemblies, a rotary disk, a plurality of screw rod nuts, a rotary support, a first driving assembly, a worm, a support ring, a plurality of bearing assemblies, and a plurality of gear shafts. The rotary support is annular. A plurality of first through holes are axially formed in the rotary support, and the plurality of screw rod nuts are connected to the rotary support. Each gear shaft is connected in a first through hole through a bearing assembly. Each gear shaft is fixedly connected to the upper end of a drill bit assembly, and the drill bit at the lower end of each drill bit assembly faces the hollow part of a drill bushing. A first groove surrounding the rotary support is radially formed on the side surface of the rotary support. A through hole is radially formed at the adjacent position of each first through hole and the first groove to penetrate the first through hole and the first groove. The rotary disk is arranged in the first groove. The support ring is arranged on the lower surface of the inner wall of the first groove. An annular second groove is axially formed on the lower surface of the rotary disk, and the support ring is in clearance fit in the second groove. The outer ring of the rotary disk is a worm gear structure, which meshes with the worm. The inner ring of the rotary disk is a straight gear structure, which meshes with each gear shaft through each through hole. The worm is connected to the first driving assembly, and the first driving assembly can drive the worm to rotate, thereby driving the rotary disk to rotate, and further driving the drill bits of the plurality of drill bit assemblies to rotate synchronously. The support assembly includes: a plurality of screw rods, a support plate, and a second driving assembly. The support plate is fixedly connected to the top of the upper flange at the upper end of the detachable shaft. The second driving assembly is fixedly connected to the support plate. The second driving assembly includes a plurality of output ends, and each output end is connected to the upper end of a screw rod. Each screw rod is perpendicular to the end face of the upper flange. The support plate is axially provided with a plurality of second through holes, each second through hole is opposite to a threaded hole of the upper flange, each lead screw passes through a second through hole and the threaded hole corresponding to the second through hole, and is threadedly connected to a lead screw nut. The bottom end of each lead screw is fixedly connected to the inner ring of a first bearing at the top end of a lead screw support structure. The second drive assembly can drive the plurality of lead screws to rotate synchronously, so as to drive the rotary assembly to move axially; When each drill bit is driven to rotate and the rotary assembly is driven to move downward, each drill bit can pass through the corresponding drill bushing to process the pin hole below the drill bushing.

2. The co-drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 1, wherein, The support assembly further includes: a plurality of guide rods. The rotary assembly further includes: a linear bearing. The drill template assembly further includes: a guide rod support structure; The plurality of linear bearings are connected to the rotary bracket; Each guide rod support structure is connected to the drill template in a penetrating manner. The part of each guide rod support structure located below the drill template is a stud, and the stud of each guide rod support structure is threadedly connected to a threaded hole of a lower flange and a threaded hole of a coupling flange; The upper ends of the plurality of guide rods are fixedly connected to the support plate. Each guide rod is perpendicular to the end face of the upper flange. Each guide rod passes through the inner ring of a linear bearing, and the bottom end of the guide rod is fixedly connected to the top end of a guide rod support structure. The rotary assembly can move axially along the guide rod.

3. The co-drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 1, wherein Each bearing assembly includes a second bearing and a third bearing; For each first through hole, the outer ring of a second bearing is fixedly connected to the upper end of the inner wall of the first through hole, the outer ring of a third bearing is fixedly connected to the lower end of the inner wall of the first through hole. The inner ring of the second bearing is in interference fit with the upper end of the gear shaft in the first through hole, and the inner ring of the third bearing is in interference fit with the lower end of the gear shaft.

4. The co-drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 1, characterized in that, The axial cross section of the support ring is trapezoidal.

5. The co-drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 1, characterized in that, The rotary assembly further includes: a plurality of rollers The upper surface of the inner wall of the first groove is connected with a plurality of rollers. The upper surface of the rotary disk is axially provided with an annular third groove. The plurality of rollers are sequentially located in the third groove, and the lower ends of the rollers press against the bottom end of the inner wall of the third groove.

6. The co-drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 5, wherein The axial cross section of each roller is an inverted trapezoid.

7. The same drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 2, characterized in that, Each lead screw support structure has a flange flat structure at the position above the drill template; Each guide rod support structure has a flange flat structure at the position above the drill template.

8. The co-drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 1, characterized in that, The drill template assembly further includes: a plurality of drill bushing supports; Each drill bushing support is a tubular structure. Each drill bushing support is fixedly connected to the edge of a U-shaped groove through wing-shaped connecting pieces extending radially on both sides. There is a preset gap between the outside of each drill bushing support and the edge of the U-shaped groove.

9. The same drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 1, characterized in that, The support assembly further includes: a plurality of clamping devices; The top ends of the plurality of clamping devices are fixedly connected to the lower end of the support plate; Each clamping device can be in interference fit with a pin hole of the upper flange, so that the support plate is fixedly connected to the top end of the upper flange at the upper end of the detachable shaft.

10. The same drilling and reaming tool applicable to the machining of the coupling pin holes of the main pump according to claim 1, characterized in that, The same drill reamer tool for processing the main pump coupling pin hole further includes: a control device; The control device establishes a communication connection with the first drive assembly and the second drive assembly, and the control device can control the first drive assembly and the second drive assembly to start working or stop working.

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