CN214720745U - Same-drilling reaming tool suitable for machining pin hole of main pump coupler - Google Patents

Abstract

The utility model belongs to the technical field of nuclear power, concretely relates to is applicable to with boring reaming instrument of main pump shaft coupling pinhole processing. This openly according to main pump shaft coupling pinhole characteristic, adopt the gang drill structure to carry out pinhole processing restoration, distribute according to the shaft coupling pinhole promptly, set up a plurality of drill bit subassemblies, adopt a plurality of drill bit subassemblies of gyration subassembly drive to rotate in step, the lead screw that deuterogamies feeds, can process simultaneously and restore a plurality of pinholes of shaft coupling unilateral, can greatly improve machining efficiency. In addition, the drill jig plate assembly can be enough with the supporting component cooperate and strengthen the stability of the alignment precision and the connection of treating the shaft coupling of processing and removable axle, can guide a plurality of drill bits axial stability again and remove, effectively avoids the drill bit incline, improves processingquality from this, reduces maintenance cycle.

Description

Same-drilling reaming tool suitable for machining pin hole of main pump coupler

Technical Field

The utility model belongs to the technical field of nuclear power fortune dimension, concretely relates to with boring hinge instrument suitable for processing of main pump shaft coupling pinhole.

Background

The nuclear power main pump is used as the only rotating equipment in the nuclear island main equipment, runs in a high-temperature and high-pressure environment with high-level discharge medium for a long time, repeatedly bears thermal shock and mechanical impact of a primary circuit coolant, and has extremely high requirements on the reliability of main pump hydraulic parts, couplings and other key parts.

According to the overhaul experience of the nuclear power plant main pump and the research on the vibration mechanism of the main pump, the coaxiality of the detachable shaft and the coupling of the main pump seriously influences the vibration characteristic of the main pump. The main pump vibration abnormality is found many times in the operation process of a certain nuclear power station, and in the follow-up main pump maintenance process, the conditions that the detachable shaft of the main pump is pulled and damaged and burrs are caused to the matching pins and the pin holes of the upper coupling and the lower coupling are caused many times. When the strain degree is relatively light, the pin holes and the cylindrical pins are polished on line in a processing mode; when the damage is serious, in order to ensure the fit clearance between the cylindrical pin and the pin hole, the simultaneous drilling and reaming and pin matching work are required. When the motor is integrally replaced, the same drilling and reaming work is required to ensure interchangeability.

At present, the original tool with drilling and reaming tool main body of nuclear power plant is a magnetic drill, and the long shaft is matched for pin hole processing, so that only one pin hole processing can be realized at one time, and the problems of heavy equipment, inconvenience in operation, complex adjustment, unstable processing quality, low efficiency and the like exist, so that the difficulty in field operation is reduced, and the processing efficiency is improved to become the problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art, the co-drilling and reaming tool suitable for machining the pin hole of the main pump coupler is provided.

According to an aspect of the embodiment of the present disclosure, a drilling and reaming tool suitable for machining a pin hole of a main pump coupler is provided, the drilling and reaming tool suitable for machining the pin hole of the main pump coupler sequentially comprises the following components in sequence from bottom to top: the lower flange at the lower end of the detachable shaft to be machined is positioned on a coupling flange of a coupling to be machined, a threaded hole of the lower flange is aligned with a threaded hole of the coupling flange, and a pin hole of the lower flange is aligned with a pin hole of the coupling flange;

the bushing plate assembly comprises: the drilling jig comprises a plurality of lead screw supporting structures, a drilling template and a plurality of drilling sleeves;

each screw rod supporting structure is penetratingly connected to the drill jig plate, the part, located below the drill jig plate, of each screw rod supporting structure is a screw bolt, the screw bolt of each screw rod supporting structure is in threaded connection with a threaded hole of one lower flange and a threaded hole of one coupler flange, the detachable shaft is fixedly connected with the coupler, and the top end of each screw rod supporting structure is fixedly connected with one first bearing;

a plurality of U-shaped grooves are formed in the edge of the drill plate along the radial direction, each U-shaped groove is fixedly connected with an annular drill bushing, and the hollow part of each drill bushing is over against a pin hole of the lower flange;

the swivel assembly includes: the rotary drilling machine comprises a plurality of drill bit assemblies, a rotary disc, a plurality of screw nuts, a rotary bracket, 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 formed in the rotary support along the axial direction, and the plurality of lead screw 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 with the upper end of one drill bit assembly, and a drill bit at the lower end of each drill bit assembly is opposite to the hollow part of one drill bushing;

first grooves surrounding the rotary support for one circle are formed in the side face of the rotary support along the radial direction, through holes are formed in the positions, adjacent to the first grooves, of each first through hole along the radial direction so as to penetrate through the first through holes and the first grooves, and the rotary disc is arranged in the first grooves;

the lower surface of the inner wall of the first groove is provided with the support ring, the lower surface of the rotary disc is provided with an annular second groove along the axial direction, and the support ring is in clearance fit with the second groove;

the outer ring of the rotary disc is of a turbine tooth structure, the turbine tooth structure is meshed with the worm, the inner ring of the rotary disc is of a straight tooth structure, the straight tooth structure is meshed with each gear shaft through each through hole, the worm is connected with the first driving assembly, and the first driving assembly can drive the worm to rotate so as to drive the rotary disc to rotate and further drive the drill bits of the drill bit assemblies to synchronously rotate;

the support assembly includes: the plurality of screw rods, the supporting plate and the second driving assembly;

the supporting plate is fixedly connected to the top end of an upper flange at the upper end of the detachable shaft, the second driving assembly is fixedly connected with the supporting plate and comprises a plurality of output ends, each output end is connected with the upper end of a screw rod, and each screw rod is perpendicular to the end face of the upper flange;

the supporting plate is provided with a plurality of second through holes along the axial direction, each second through hole is over against a threaded hole of the upper flange, each screw rod passes through one second through hole and the threaded hole corresponding to the second through hole and is in threaded connection with a screw rod nut, and the bottom end of each screw rod is fixedly connected in an inner ring of a first bearing at the top end of a screw rod supporting structure;

the second driving assembly can drive the plurality of screw rods to synchronously rotate, so that the rotary assembly is driven to axially move;

under the condition that the drill bits are driven to rotate and the rotating assembly is driven to move downwards, the drill bits can penetrate through the opposite drill sleeves to machine pin holes below the drill sleeves.

In one possible implementation, the support assembly further includes: a plurality of guide rods, the swivel assembly further comprising: a linear bearing, the bushing plate assembly further comprising: a guide bar support structure;

the linear bearings are connected to the rotating bracket;

each guide rod supporting structure is penetratingly connected to the drill jig plate, the part, located below the drill jig plate, of each guide rod supporting structure is a stud, and the stud of each guide rod supporting structure is in threaded connection with a threaded hole of one lower flange and a threaded hole of one coupler flange;

the upper ends of the guide rods are fixedly connected with the supporting plate, each guide rod is perpendicular to the end face of the upper flange, each guide rod penetrates through the inner ring of one linear bearing, the bottom end of each guide rod is fixedly connected to the top end of one guide rod supporting structure, and the rotary assembly can axially move along the guide rods.

In one possible implementation, each bearing assembly includes a second bearing and a third bearing;

aiming at 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 a 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.

In a possible realization, the support ring has a trapezoidal axial cross section.

In one possible implementation, the swivel assembly further includes: multiple rollers

The upper surface of the inner wall of the first groove is connected with a plurality of rollers, an annular third groove is formed in the upper surface of the rotary disc along the axial direction, the plurality of rollers are sequentially located in the third groove, and the lower end of each roller is pressed against the bottom end of the inner wall of the third groove.

In one possible implementation, the axial cross-section of each roller is an inverted trapezoid.

In one possible implementation, each lead screw support structure has a flange flat square structure at a position above the drill plate;

each guide rod support structure is provided with a flange flat square structure at a position above the drill plate.

In one possible implementation, the drill plate assembly further includes: a plurality of drill bushing supports;

each drill bushing support is of a tubular structure, each drill bushing support is fixedly connected with the edge of one U-shaped groove through wing-shaped connecting sheets extending along the radial direction on two sides, and a preset gap is formed between the outer side of each drill bushing support and the edge of the U-shaped groove.

In one possible implementation, 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 supporting plate;

each clamping device can be in interference fit in one pin hole of the upper flange, so that the supporting plate is fixedly connected to the top end of the upper flange at the upper end of the detachable shaft.

In one possible implementation, the co-drilling and reaming tool for machining the pin hole of the main pump coupling further comprises: a control device;

the control equipment is in communication connection with the first driving assembly and the second driving assembly, and the control equipment can control the first driving assembly and the second driving assembly to start or stop working.

The beneficial effect of this disclosure lies in: this openly according to main pump shaft coupling pinhole characteristic, adopt the gang drill structure to carry out pinhole processing restoration, distribute according to the shaft coupling pinhole promptly, set up a plurality of drill bit subassemblies, adopt a plurality of drill bit subassemblies of gyration subassembly drive to rotate in step, the lead screw that deuterogamies feeds, can process simultaneously and restore a plurality of pinholes of shaft coupling unilateral, can greatly improve machining efficiency. In addition, the drill jig plate assembly can be enough with the supporting component cooperate and strengthen the stability of the alignment precision and the connection of treating the shaft coupling of processing and removable axle, can guide a plurality of drill bits axial stability again and remove, effectively avoids the drill bit incline, improves processingquality from this, reduces maintenance cycle.

Drawings

FIG. 1 is a schematic diagram illustrating a co-drilling and reaming tool suitable for primary pump coupling pin bore machining according to an exemplary embodiment.

FIG. 2 is a schematic diagram illustrating a co-drilling and reaming tool suitable for primary pump coupling pin bore machining according to an exemplary embodiment.

FIG. 3 is a schematic illustration of a coupling with a detachable shaft in an example application.

FIG. 4 is a schematic diagram illustrating a bushing plate assembly according to an exemplary embodiment.

FIG. 5 is a schematic view of a swing assembly shown in accordance with an exemplary embodiment.

FIG. 6 is a schematic diagram illustrating a partial cross-section of a swing assembly in accordance with an exemplary embodiment.

FIG. 7 is a schematic diagram illustrating a partial cross-section of a swing assembly in accordance with an exemplary embodiment.

FIG. 8 is a schematic view of a support assembly shown in accordance with an exemplary embodiment.

Detailed Description

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

FIG. 3 is a schematic illustration of a coupling with a detachable shaft in an example application. As shown in fig. 3, before the pin hole of the main pump coupler is machined, the detachable shaft 2 of the main pump needs to be mounted on the coupler 1, the detachable shaft 2 and the coupler 1 are integrally of a vertical mounting structure, the coaxiality of the pin hole 202 of the detachable shaft 2 and the pin hole (not shown) of the coupler 1 is adjusted, and the coaxiality of the threaded hole 201 of the detachable shaft 2 and the threaded hole (not shown) of the coupler 1 is adjusted to meet the machining process requirement.

Fig. 1 and 2 are schematic diagrams illustrating a co-drilling and reaming tool suitable for machining a main pump coupling pin bore according to an exemplary embodiment. As shown in fig. 1 and 2, the co-drilling and reaming tool suitable for machining the pin hole of the main pump coupling comprises: a support assembly 5, a rotary assembly 4 and a drill plate assembly 3. Wherein, the drill plate assembly 3 is arranged on a lower flange of the detachable shaft 2, the rotary assembly 4 is arranged above the drill plate assembly 3, and the support assembly 5 is arranged above the rotary assembly 4.

FIG. 4 is a schematic diagram illustrating a bushing plate assembly according to an exemplary embodiment. As shown in fig. 4, the drill plate assembly includes: a plurality of lead screw support structures 301, a plurality of guide bar support structures 306, a jig plate 303, a plurality of drill bushings 305;

the screw rod supporting structures 301 are penetratingly connected to the drilling jig plate 303, the parts, located below the drilling jig plate 303, of the screw rod supporting structures 301 are screw bolts, the relative positions of the screw rod supporting structures 301 are matched with the relative positions of the threaded holes of the lower flange of the detachable shaft, so that the screw bolt of each screw rod supporting structure 301 can be in threaded connection with the threaded hole of one lower flange and the threaded hole of one coupling flange, and the top end of each screw rod supporting structure 301 is fixedly connected with one first bearing. The edge of the drilling template plate 303 is provided with a plurality of U-shaped grooves along the radial direction, each U-shaped groove is fixedly connected with an annular drilling sleeve 305, and the hollow part of each drilling sleeve 305 is opposite to a pin hole of the lower flange. Therefore, the drill jig plate assembly can be effectively fixed by the structure of the drill jig plate assembly, a positioning reference is formed for the drilling and reaming tool which is suitable for machining the pin hole of the main pump coupler as a whole, and the detachable shaft and the coupler can be effectively and fixedly connected.

In one possible implementation, each lead screw support structure has a flange flat square structure at a position above the drill plate; when each screw rod supporting structure is installed, the flange flat square structure can be screwed through a wrench, the drill jig plate can be tightly pressed by the flange flat square structure, and the connection between the drill jig plate and the lower flange is further reinforced.

In one possible implementation, as shown in fig. 4, the drilling 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 with the edge of a U-shaped groove through wing-shaped connecting sheets extending from two sides along the radial direction, a preset gap is formed between the outer side of each drill bushing support and the edge of the U-shaped groove, the distance between each drill bushing support and the edge of the U-shaped groove can be adjusted according to the position deviation of a detachable shaft pin hole, for example, a plurality of threaded holes can be formed in the edges of two sides of the U-shaped groove, a plurality of threaded holes can be formed in each wing-shaped connecting sheet, the wing-shaped connecting sheets can be connected with different threaded holes in the edge of the U-shaped groove and the wing-shaped connecting sheets through screws, the distance between each drill bushing support and the edge of the U-shaped groove can be adjusted, and therefore the drill plate assembly can adapt to the position deviation of the detachable shaft pin hole more flexibly.

FIG. 5 is a schematic view of a swing assembly shown in accordance with an exemplary embodiment. FIG. 6 is a schematic diagram illustrating a partial cross-section of a swing assembly in accordance with an exemplary embodiment. FIG. 7 is a schematic diagram illustrating a partial cross-section of a swing assembly in accordance with an exemplary embodiment. As shown in fig. 5 to 7, the swivel assembly includes: a plurality of drill bit assemblies, a rotary disk 403, a plurality of lead screw nuts 404, a rotary 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;

as shown in fig. 5 to 7, the rotary bracket 405 is annular, the rotary bracket 405 is provided with a plurality of first through holes along the axial direction, and the plurality of lead screw nuts 404 are connected to the rotary bracket 405; each gear shaft 413 is connected in a first through hole through a bearing assembly, each gear shaft 413 is fixedly connected with the upper end of a drill bit assembly, each drill bit assembly comprises a floating chuck 402 and a drill bit 401, the upper end of each floating chuck 402 is connected with the gear shaft 413 through a flat key 418 key, and the lower end of each floating chuck 402 is connected with the drill bit. The drill bit 401 at the lower end of each drill bit assembly faces the hollow part of one drill sleeve 305, and each drill sleeve 305 can guide the axial movement of the drill bit 401 for machining a corresponding pin hole, so that the drill bit 401 is effectively prevented from shifting in the axial movement process.

The side surface of the rotary support 405 is radially provided with first grooves surrounding the rotary support 405 for a circle, a through hole is radially formed at the position adjacent to each first through hole and each first groove so as to penetrate through the first through holes and the first grooves, and the rotary disc 403 is arranged in the first grooves; the lower surface of the inner wall of the first groove is provided with a support ring 410, the lower surface of the rotary disc 403 is provided with an annular second groove along the axial direction, and the support ring 410 is in clearance fit in the second groove;

the outer ring of the rotary disc 403 is of a worm gear structure, the worm gear structure is meshed with a worm 409, the inner ring of the rotary disc 403 is of a straight tooth structure, the straight tooth structure is meshed with each gear shaft 413 through each through hole, the worm 409 can be arranged in a worm box 407, the worm 409 is connected with a first driving assembly 408 (for example, the first driving assembly can be a motor), and the first driving assembly 408 can drive the worm 409 to rotate, so that the rotary disc 403 is driven to rotate, and further the drill bits 401 of the plurality of drill bit assemblies are driven to rotate synchronously;

in one possible implementation, as shown in fig. 7, the upper end of the rotating bracket 405 is fixedly connected to the upper end cover 415, the lower end of the rotating bracket 405 is fixedly connected to the lower end cover 411, and the upper end of each gear shaft 413 is fixedly connected to one central end cover 416 through a screw 417.

In a possible realization, the support ring has a trapezoidal axial section to reduce the friction between the support ring and the turntable.

In one possible implementation, as shown in fig. 6 and 7, the swing assembly further includes: a plurality of rollers 419, the upper surface of the inner wall of the first groove is connected with the plurality of rollers 419, an annular third groove is formed in the upper surface of the rotary disc 403 along the axial direction, the plurality of rollers 419 are sequentially positioned in the third groove, and the lower end of each roller 419 is pressed against the bottom end of the inner wall of the third groove. In this way, the roller 419 and the support ring 410 support and press the rotating disc 403 together, so as to position and rotatably support the rotating disc 403 on the rotating bracket 405.

In one possible implementation, the axial cross-section of each roller is an inverted trapezoid.

In one possible implementation, as shown in fig. 6 and 7, 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, 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.

In one possible implementation, the second bearing may be a roller bearing and the third bearing may be an angular contact bearing.

FIG. 8 is a schematic view of a support assembly shown in accordance with an exemplary embodiment. As shown in fig. 8, 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 attached to the upper flange top end of the upper end of the removable shaft, for example, the support assembly further comprises: a plurality of clamping devices 504, wherein the top ends of the clamping devices 504 are fixedly connected with the lower end of the supporting plate 505; each clamping device can be in interference fit with one pin hole of the upper flange, so that the supporting plate is fixedly connected to the top end of the upper flange at the upper end of the detachable shaft.

In one possible implementation, a plurality of through holes are axially formed in the support plate 505 according to the size and distribution of the bolt holes and the pin holes of the detachable shaft, and concentric hard non-metal equal-height pads are installed at the bottoms of the through holes corresponding to the bolt holes of the detachable shaft, so as to prevent the flange surface from being damaged by pressure.

The second driving assembly 503 is fixedly connected with the supporting plate 505, the second driving assembly 503 comprises a plurality of output ends, each output end is connected with the upper end of one screw rod 502, and each screw rod 502 is perpendicular to the end surface of the upper flange;

for example, the second driving assembly 503 may include a motor, a gear box 509, an input gear 506, a plurality of transition gears 507 and a plurality of output gears 508, the input gear 506, the plurality of transition gears 507 and the plurality of output gears 508 are disposed in the gear box 509, the input gear 506 is connected to an output end of the motor, each transition gear 507 is engaged with the input gear 506, each output gear 508 is engaged with one transition gear 507, each output gear 508 is connected to an upper end of one lead screw 502, and the motor is capable of driving the input gear 506 to rotate, thereby driving the transition gears 507 and the output gears 508 to rotate synchronously, thereby driving the plurality of lead screws 502 to rotate synchronously.

A plurality of second through holes are axially formed in the support plate 505, each second through hole is opposite to a threaded hole of the upper flange, each lead screw 502 penetrates through one second through hole and a threaded hole corresponding to the second through hole and is in threaded connection with one lead screw nut 404, the bottom end of each lead screw 502 is fixedly connected to the inner ring of the first bearing at the top end of one lead screw support structure 301, in a possible implementation mode, the elastic sleeve 302 can be installed in the inner ring of the first bearing in an interference fit mode, and for example, the elastic sleeve can be subjected to bearing limiting through an elastic retainer ring; the inner hole of the elastic sleeve is used for installing a screw rod, and the elastic structure of the elastic sleeve can be compressed by screwing a plurality of locking screws at the upper end of the elastic sleeve, so that the elastic sleeve tightly holds the optical axis section of the screw rod, and the axial fixation of the lower end of the screw rod is realized;

the second driving assembly can drive the plurality of screw rods to synchronously rotate, so that the rotary assembly is driven to axially move;

in one possible implementation, the support assembly further includes: a plurality of guide rods 501, the swivel assembly further comprises: the linear bearing 406, the drilling template 303 assembly further comprises: a guide bar support structure 306;

as shown in fig. 4, 6 and 8, a plurality of linear bearings 406 are attached to the rotating bracket 405; each guide rod support structure 306 is penetratingly connected to the drilling template 303, the part, below the drilling template 303, of each guide rod support structure 306 is a stud, and the stud of each guide rod support structure 306 is in threaded connection with a threaded hole of one lower flange and a threaded hole of one coupler flange; the upper ends of a plurality of guide rods 501 are fixedly connected with the support plate 505, each guide rod 501 is perpendicular to the end surface of the upper flange, each guide rod 501 penetrates through the inner ring of one linear bearing 406, the bottom end of the guide rod 501 is fixedly connected to the top end of one guide rod support structure 306, and the rotating assembly can axially move along the plurality of guide rods 501. Thus, the plurality of guide rods 501 can guide the rotating assembly, and the stability of the rotating assembly in the moving process can be improved.

In a possible implementation manner, as shown in fig. 4, the upper end of the guide bar supporting structure 306 is a conical section of an elastic shaft structure with a groove on a conical surface, the inner hole is used for installing an optical shaft section at the lower end of the guide bar, the inner wall below the conical section is cylindrical, the cylindrical inner wall has a threaded structure, the guide bar supporting structure 306 further includes a gland nut 307, the inner wall of the gland nut 307 is an inverted conical surface structure, the gland nut 307 is sleeved on the outer side of the upper end of the guide bar supporting structure 306, the gland nut 307 rotates to move downwards, the inverted conical surface of the gland nut 307 gradually extrudes the conical surface structure of the guide bar supporting structure 306, so that the optical shaft section of the inserted guide bar is embraced by the elastic shaft structure with the groove, and the guide bar is fixed.

In one possible implementation, each guide bar support structure has a flange spade structure at a location above the bushing plate. When each guide rod supporting structure is installed, the flange flat square structure of the guide rod supporting structure can be screwed through a wrench, and the flange flat square structure can be enabled to compress the drill jig plate.

In one possible implementation, the co-drilling and reaming tool for machining the pin hole of the main pump coupling further comprises: a control device; the control device establishes a communication connection (for example, wired communication or wireless communication, which is not limited in this disclosure) with the first driving assembly and the second driving assembly, and the control device can control the first driving assembly and the second driving assembly to start or stop working. The first driving assembly can be controlled by the control device to drive the drill bits to rotate, the second driving assembly is controlled by the control device to drive the screw rods to rotate, the rotating assembly is driven to move downwards, and the drill bits can penetrate through the drill sleeves which are right opposite to each other to machine pin holes below the drill sleeves.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. The utility model provides a with boring and reaming instrument suitable for processing of main pump shaft coupling pinhole, a serial communication port, the with boring and reaming instrument suitable for processing of main pump shaft coupling pinhole includes according to the order by supreme down in proper order: the lower flange at the lower end of the detachable shaft to be machined is positioned on a coupling flange of a coupling to be machined, a threaded hole of the lower flange is aligned with a threaded hole of the coupling flange, and a pin hole of the lower flange is aligned with a pin hole of the coupling flange;

the bushing plate assembly comprises: the drilling jig comprises a plurality of lead screw supporting structures, a drilling template and a plurality of drilling sleeves;

each screw rod supporting structure is penetratingly connected to the drill jig plate, the part, located below the drill jig plate, of each screw rod supporting structure is a screw bolt, the screw bolt of each screw rod supporting structure is in threaded connection with a threaded hole of one lower flange and a threaded hole of one coupler flange, the detachable shaft is fixedly connected with the coupler, and the top end of each screw rod supporting structure is fixedly connected with one first bearing;

a plurality of U-shaped grooves are formed in the edge of the drill plate along the radial direction, each U-shaped groove is fixedly connected with an annular drill bushing, and the hollow part of each drill bushing is over against a pin hole of the lower flange;

the swivel assembly includes: the rotary drilling machine comprises a plurality of drill bit assemblies, a rotary disc, a plurality of screw nuts, a rotary bracket, 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 formed in the rotary support along the axial direction, and the plurality of lead screw 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 with the upper end of one drill bit assembly, and a drill bit at the lower end of each drill bit assembly is opposite to the hollow part of one drill bushing;

first grooves surrounding the rotary support for one circle are formed in the side face of the rotary support along the radial direction, through holes are formed in the positions, adjacent to the first grooves, of each first through hole along the radial direction so as to penetrate through the first through holes and the first grooves, and the rotary disc is arranged in the first grooves;

the lower surface of the inner wall of the first groove is provided with the support ring, the lower surface of the rotary disc is provided with an annular second groove along the axial direction, and the support ring is in clearance fit with the second groove;

the outer ring of the rotary disc is of a turbine tooth structure, the turbine tooth structure is meshed with the worm, the inner ring of the rotary disc is of a straight tooth structure, the straight tooth structure is meshed with each gear shaft through each through hole, the worm is connected with the first driving assembly, and the first driving assembly can drive the worm to rotate so as to drive the rotary disc to rotate and further drive the drill bits of the drill bit assemblies to synchronously rotate;

the support assembly includes: the plurality of screw rods, the supporting plate and the second driving assembly;

the supporting plate is fixedly connected to the top end of an upper flange at the upper end of the detachable shaft, the second driving assembly is fixedly connected with the supporting plate and comprises a plurality of output ends, each output end is connected with the upper end of a screw rod, and each screw rod is perpendicular to the end face of the upper flange;

the supporting plate is provided with a plurality of second through holes along the axial direction, each second through hole is opposite to one threaded hole of the upper flange, each screw rod penetrates through one second through hole and the threaded hole corresponding to the second through hole and is in threaded connection with a screw rod nut, the bottom end of each screw rod is fixedly connected in the inner ring of the first bearing at the top end of one screw rod supporting structure, and the second driving assembly can drive the screw rods to synchronously rotate so as to drive the rotary assembly to axially move;

under the condition that the drill bits are driven to rotate and the rotating assembly is driven to move downwards, the drill bits can penetrate through the opposite drill sleeves to machine pin holes below the drill sleeves.

2. The co-drilling and reaming tool for machining pin holes of main pump couplings of claim 1, wherein the support assembly further comprises: a plurality of guide rods, the swivel assembly further comprising: a linear bearing, the bushing plate assembly further comprising: a guide bar support structure;

the linear bearings are connected to the rotating bracket;

each guide rod supporting structure is penetratingly connected to the drill jig plate, the part, located below the drill jig plate, of each guide rod supporting structure is a stud, and the stud of each guide rod supporting structure is in threaded connection with a threaded hole of one lower flange and a threaded hole of one coupler flange;

the upper ends of the guide rods are fixedly connected with the supporting plate, each guide rod is perpendicular to the end face of the upper flange, each guide rod penetrates through the inner ring of one linear bearing, the bottom end of each guide rod is fixedly connected to the top end of one guide rod supporting structure, and the rotary assembly can axially move along the guide rods.

3. The co-drilling and reaming tool for main pump coupling pin bore machining of claim 1, wherein each bearing assembly comprises a second bearing and a third bearing;

aiming at 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 a 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 for machining pin holes of main pump couplings according to claim 1, wherein the axial cross section of the support ring is trapezoidal.

5. The co-drilling and reaming tool for machining pin holes of main pump couplings of claim 1, wherein the swivel assembly further comprises: multiple rollers

The upper surface of the inner wall of the first groove is connected with a plurality of rollers, an annular third groove is formed in the upper surface of the rotary disc along the axial direction, the plurality of rollers are sequentially located in the third groove, and the lower end of each roller is pressed against the bottom end of the inner wall of the third groove.

6. The co-drilling and reaming tool for machining the pin hole of the main pump coupling as claimed in claim 5, wherein each roller has an inverted trapezoidal axial cross section.

7. The co-drilling and reaming tool for machining the pin hole of the main pump coupler as claimed in claim 2, wherein each lead screw supporting structure is provided with a flange flat square structure at a position above the drill plate;

each guide rod support structure is provided with a flange flat square structure at a position above the drill plate.

8. The co-drilling and reaming tool for machining pin holes of main pump couplings of claim 1, wherein the drill plate assembly further comprises: a plurality of drill bushing supports;

each drill bushing support is of a tubular structure, each drill bushing support is fixedly connected with the edge of one U-shaped groove through wing-shaped connecting sheets extending along the radial direction on two sides, and a preset gap is formed between the outer side of each drill bushing support and the edge of the U-shaped groove.

9. The co-drilling and reaming tool for machining pin holes of main pump couplings of claim 1, wherein the support assembly further comprises: a plurality of clamping devices;

the top ends of the plurality of clamping devices are fixedly connected to the lower end of the supporting plate;

each clamping device can be in interference fit in one pin hole of the upper flange, so that the supporting plate is fixedly connected to the top end of the upper flange at the upper end of the detachable shaft.

10. The co-drilling and reaming tool suitable for machining the pin hole of the main pump coupling according to claim 1, wherein the co-drilling and reaming tool for machining the pin hole of the main pump coupling further comprises: a control device;

the control equipment is in communication connection with the first driving assembly and the second driving assembly, and the control equipment can control the first driving assembly and the second driving assembly to start or stop working.

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