CN111267039B - Disassembling tool and disassembling method for power station diesel engine on-board cooling water pump impeller - Google Patents
Disassembling tool and disassembling method for power station diesel engine on-board cooling water pump impeller Download PDFInfo
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- CN111267039B CN111267039B CN202010245889.5A CN202010245889A CN111267039B CN 111267039 B CN111267039 B CN 111267039B CN 202010245889 A CN202010245889 A CN 202010245889A CN 111267039 B CN111267039 B CN 111267039B
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- 239000000498 cooling water Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 75
- 239000007924 injection Substances 0.000 claims abstract description 75
- 238000007789 sealing Methods 0.000 claims description 36
- 239000000314 lubricant Substances 0.000 claims description 24
- 239000004519 grease Substances 0.000 claims description 19
- 230000001050 lubricating effect Effects 0.000 claims description 16
- 230000003068 static effect Effects 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 9
- 230000007547 defect Effects 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of mechanical equipment overhaul, and particularly relates to a disassembly and assembly tool and a disassembly and assembly method for an on-board cooling water pump impeller of a diesel engine of a power station. The outer surface of the hydraulic cylinder is provided with external threads; the external thread at the left end of the hydraulic cylinder is matched and connected with the internal thread at the right end of the injection sleeve; the plunger is inserted into the hollow cavity of the hydraulic cylinder and penetrates through the left-end stepped hole; the outer surface of the joint is provided with external threads; the external thread at the right end of the hydraulic cylinder is in fit connection with the internal thread at the left end of the hollow cavity of the joint; the left end of the outer surface of the hydraulic pipe is provided with an outer hexagonal nut, the right side of the outer hexagonal nut is provided with an outer thread, the right side of the outer thread is provided with a step shaft, and the right side of the step shaft is provided with an outer thread; the external thread at the right end of the joint is in fit connection with the internal thread at the left side of the hollow cavity of the hydraulic pipe; the sleeve nut is a regular hexagon cylinder, the inside of the sleeve nut is hollow, and an outer hexagon nut is arranged on the outer surface of the sleeve nut. The invention has simple structure, can efficiently complete the disassembly and assembly of the impeller of the cooling water pump, and can not cause any damage to parts such as the impeller, the pump shaft and the like.
Description
Technical Field
The invention belongs to the technical field of mechanical equipment overhaul, and particularly relates to a disassembly and assembly tool and a disassembly and assembly method for an on-board cooling water pump impeller of a diesel engine of a power station.
Background
The diesel engine of a certain power station has the advantages of wide power range, good starting performance, high effective efficiency, compact structure, simple operation, safe operation and the like, and is widely applied to a nuclear power station as an emergency standby power supply of the nuclear power station.
The machine-mounted cooling water pump comprises an impeller, a mouth ring, a bearing, a pump shaft and other parts which are easy to wear, and a mechanical seal, an oil seal, a sealing ring and other parts with the service life. In order to ensure the normal operation of the cooling water pump, according to the operation and maintenance manual requirement, the cooling water pump needs to be maintained in a preventive manner, and the maintenance items mainly comprise: replacing life-time components such as mechanical seal, oil seal, sealing ring and the like; checking the impeller state, and if the impeller has defects such as friction, cavitation, corrosion and the like, repairing or replacing the impeller; checking the states of the matching surfaces of the impeller and the pump shaft and the states of the bearing and the pump shaft, and repairing or replacing if the defects such as corrosion, pull marks and the like exist; checking the state of the gear, if the defects such as pitting and pit exist, repairing or replacing is needed. The pump shaft is provided with 1 axial pressing threaded hole, 1 axial oil duct and 2 radial oil ducts at the left end, wherein the axial oil duct is concentric with and communicated with the axial pressing threaded hole, and the central line of the radial oil duct is perpendicular to and communicated with the central line of the axial oil duct.
In the maintenance process, replacing life-span parts such as mechanical seals, oil seals, sealing rings and the like, checking the state of the impeller, and checking the state of the matching surfaces of the impeller and the pump shaft and the matching surfaces of the bearing and the pump shaft, wherein the impeller of the cooling water pump is required to be disassembled and assembled.
Therefore, a disassembly and assembly tool and a disassembly and assembly method for an on-board cooling water pump impeller of a diesel engine of a power station are needed to realize the disassembly and assembly of the cooling water pump impeller.
Disclosure of Invention
The invention aims to provide a disassembly and assembly tool and a disassembly and assembly method for an on-board cooling water pump impeller of a diesel engine of a power station, which have the advantages of simple structure and simple operation, can efficiently complete the disassembly and assembly of the cooling water pump impeller, and can not cause any damage to parts such as the impeller, a pump shaft and the like.
The invention adopts the technical scheme that:
the utility model provides a power station diesel engine machine carries cooling water pump impeller assembly and disassembly tools, includes injection sleeve, plunger, pneumatic cylinder, joint, hydraulic pipe and collet nut; the injection sleeve is cylindrical, the right end of the injection sleeve is hollow, and the inner surface of the hollow cavity is provided with internal threads; the hydraulic cylinder is in a stepped cylinder shape and hollow in the inside, an external thread is arranged at the left end of the outer surface of the hydraulic cylinder, an external hexagonal nut is arranged on the right side of the external thread, and an external thread is arranged on the right side of the external hexagonal nut; the external thread at the left end of the hydraulic cylinder is matched and connected with the internal thread at the right end of the injection sleeve; the plunger is a cylinder optical axis, is inserted into the inner hollow cavity of the hydraulic cylinder, passes through the left end step hole and reaches the inner wall of the hollow cavity of the injection sleeve; the joint is in a stepped cylindrical shape, the inside of the joint is hollow, the left end of the outer surface of the joint is provided with an outer hexagonal nut, and the right end of the joint is provided with an outer thread; the external thread at the right end of the hydraulic cylinder is in fit connection with the internal thread at the left end of the hollow cavity of the joint; the hydraulic pipe is in a stepped cylindrical shape and hollow, an outer hexagonal nut is arranged at the left end of the outer surface of the hydraulic pipe, an external thread is arranged on the right side of the outer hexagonal nut, a stepped shaft is arranged on the right side of the external thread, and an external thread is arranged on the right side of the stepped shaft; the external thread at the right end of the joint is in fit connection with the internal thread at the left side of the hollow cavity of the hydraulic pipe; the sleeve nut is a regular hexagon cylinder, the inside of the sleeve nut is hollow, and an outer hexagon nut is arranged on the outer surface of the sleeve nut.
The horizontal bisection face of the left end of the injection sleeve is provided with a radial through hole, the top of the injection sleeve is provided with an exhaust hole, the handle penetrates through the radial through hole, the center line of the injection sleeve is positioned on the vertical center line of the handle, and the handle and the injection sleeve are fixed together through welding.
The left end and the right end of the hollow cavity of the hydraulic cylinder are respectively provided with a step hole, the left step hole and the right step hole are concentric, and the inner diameter of the right step hole is larger than that of the left step hole.
The left end and the right end of the joint hollow cavity are respectively provided with a step hole, the inside of each hole is provided with internal threads, the left step hole and the right step hole are concentric, and the inner diameter of the right step hole is larger than that of the left step hole.
The right-end stepped hole of the connector is internally provided with a sphere and is connected with an external thread screw sleeve, the screw sleeve is cylindrical, the left side of the screw sleeve is provided with a hollow cavity, the inner diameter of the hollow cavity is larger than the diameter of the sphere, and the outer surface of the screw sleeve is provided with an axial groove.
The left end and the right end of the hollow cavity of the sleeve nut are respectively provided with a step hole, the left step hole and the right step hole are concentric, the inner diameter of the left step hole is larger than that of the right step hole, and the inner surfaces of the right step hole are respectively provided with internal threads; the external thread at the left end of the joint is in fit connection with the internal thread at the left end of the sleeve nut, and the external thread at the right end of the hydraulic pipe is in fit connection with the internal thread at the right end of the sleeve nut
A disassembly and assembly method of a disassembly and assembly tool for an on-board cooling water pump impeller of a diesel engine of a power station comprises the following steps:
step one: checking to confirm that the cooling water pump is horizontally placed and fixed firmly; removing the cock and the cock sealing gasket from the inlet cone, and discharging residual cooling water in the pump body cleanly; dismantling a connecting screw between the inlet cone and the pump body, and dismantling the inlet cone from the pump body; removing the inlet cone seal ring from the inlet cone; removing the impeller back cap from the left end of the pump shaft;
step two: smearing a proper amount of lubricant on the external thread of the hydraulic cylinder, mounting the injection sleeve on the hydraulic cylinder from the left side, rotating the injection sleeve handle to push the injection sleeve to move rightwards, and stopping rotating the injection sleeve handle when the internal thread in the hollow cavity at the right end of the injection sleeve is firmly screwed with the external thread at the left end of the hydraulic cylinder; a proper amount of lubricant is smeared on the outer cylindrical surface of the plunger, the plunger is filled into the hollow cavity of the hydraulic cylinder from the right side, and the plunger is pushed to the bottom by using the push rod; filling grease into the stepped hole at the right end of the hydraulic cylinder by using an oil injector; smearing a proper amount of lubricant on the external thread of the joint, loading the joint into an inner hollow cavity on the left side of the hydraulic pipe from the left side, fixing the hydraulic pipe, fastening an external hexagonal nut of the joint, and locking the joint and the hydraulic pipe; smearing a proper amount of lubricant on the external thread of the hydraulic pipe, loading the joint and the hydraulic pipe assembly into the inner hollow cavity on the left side of the sleeve nut from the left side, fixing the sleeve nut, and rotating the hydraulic pipe to enable the external thread on the right side of the hydraulic pipe external hexagonal nut to be screwed with the internal thread in the stepped hole on the right end of the sleeve nut; installing the joint, the hydraulic pipe and the sleeve nut assembly into an internal thread hollow cavity at the left end of the pump shaft, loosening and moving the sleeve nut rightward, stopping moving the sleeve nut when the distance between the right end surface of the sleeve nut and the left end surface of the impeller is equal to the movement distance required by the release pressure of the impeller, fixing the pump shaft, rotating the hexagon nut outside the hydraulic pipe, and locking the joint, the hydraulic pipe assembly and the pump shaft; installing an injection sleeve, a plunger and a hydraulic cylinder assembly into an internal thread hollow cavity at the left end of a joint, fixing the joint, rotating an outer hexagonal nut of the hydraulic cylinder, and locking the injection sleeve, the plunger and the hydraulic cylinder assembly with the joint, a hydraulic pipe and a sleeve nut assembly;
step three: rotating the handle of the injection sleeve to push the injection sleeve to move rightwards so as to pressurize lubricating grease in the hydraulic cylinder, pushing a spherical body in a hollow cavity of the joint to move rightwards, enabling high-pressure lubricating grease to enter a hydraulic pipe through an axial groove on a threaded sleeve in the hollow cavity of the joint, then entering an axial oil duct and a radial oil duct in a pump shaft, expanding the inner diameter of an impeller, separating the impeller from the pump shaft, and enabling the left end face of the impeller to be attached to the right end face of a sleeve nut; loosening and moving the sleeve nut leftwards, and stopping moving the sleeve nut when the internal thread in the stepped hole at the right end of the sleeve nut is screwed with the external thread at the right side of the hydraulic pipe external hexagonal nut;
step four: integrally removing the impeller assembly and disassembly tool from the pump shaft;
step five: removing the impeller from the pump shaft, and removing the mechanical seal moving ring on the impeller; sequentially removing a stuffing box fastening screw and a stuffing box, removing a mechanical seal static ring positioning pin on the stuffing box, removing a mechanical seal static ring, and removing a stuffing box sealing ring on the stuffing box; cleaning all the disassembled parts, and drying by using compressed air; checking the state of the impeller, if the impeller has defects such as friction, cavitation and corrosion, repairing or replacing the impeller, and checking the state of the matching surface of the impeller and the pump shaft, if the impeller has defects such as corrosion and pull marks, repairing or replacing the impeller; replacing a stuffing box sealing ring, smearing a proper amount of lubricant, filling the stuffing box sealing ring into a groove on the stuffing box, replacing a mechanical sealing static ring, smearing a proper amount of lubricant, filling the mechanical sealing static ring into a stuffing box hollow cavity, and reinstalling a mechanical sealing static ring positioning pin; filling the stuffing box assembly into the pump body, and refilling the stuffing box fastening screw; replacing the mechanical seal moving ring, smearing a proper amount of lubricant, and mounting the mechanical seal moving ring on a step shaft on the right side of the impeller; mounting the impeller assembly to the pump shaft from the left end;
step six: installing the tool dismantled in the fourth step on the pump shaft, loosening and rightwards sleeving the sleeve nut, and stopping when the right end face of the sleeve nut is attached to the left end face of the impeller; rotating the injection sleeve handle to push the injection sleeve to move rightwards so as to pressurize lubricating grease in the hydraulic cylinder, pushing a ball body in a hollow cavity of the joint to move rightwards, enabling high-pressure lubricating grease to enter a hydraulic pipe through an axial groove on a screw sleeve in the hollow cavity of the joint, then entering an axial oil duct and a radial oil duct in a pump shaft, expanding the inner diameter of an impeller, rotating a hexagonal nut outside the sleeve nut, moving the impeller rightwards, and stopping rotating the injection sleeve handle when the left end face of the impeller is level with the left end face of an impeller mounting step shaft;
step seven: removing the injection sleeve, the plunger and the hydraulic cylinder assembly, and fastening a sleeve nut; removing the fitting from the hydraulic tube to release pressure in the hydraulic tube; loosening and moving the sleeve nut leftwards, and stopping moving the sleeve nut when the internal thread in the stepped hole at the right end of the sleeve nut is screwed with the external thread at the right side of the hydraulic pipe external hexagonal nut;
step eight: cleaning lubricating grease at the outer thread of the left end of the pump shaft, and mounting an impeller back cap back to fasten the impeller back cap; replacing the inlet cone sealing ring, smearing a proper amount of lubricant, and loading the inlet cone sealing ring into a groove on the inlet cone; the inlet cone is reloaded on the pump body, and a connecting screw between the inlet cone and the pump body is reloaded; replacing the plug sealing gasket, and reinstalling the plug sealing gasket and the plug;
step nine: separating the injection sleeve, the plunger and the hydraulic cylinder, separating the joint, the sleeve nut and the hydraulic pipe, cleaning the injection sleeve, the plunger, the hydraulic cylinder, the joint, the hydraulic pipe and the sleeve nut, and drying by compressed air; tool parts are cleaned up, rust-proof oil is smeared on the thread, the opening is plugged, tinfoil paper is used for packaging, the tool parts are stored in a special tool box, and drying agents are required to be placed in the tool box.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention provides a disassembly and assembly tool for an on-board cooling water pump impeller of a diesel engine of a power station, which has the advantages of simple structure, simplicity in operation, convenience in maintenance and lower requirement on the skill level of operators;
(2) The invention provides an impeller dismounting tool of an on-board cooling water pump of a diesel engine of a power station, which has reasonable structural design, and can finish the dismounting of the impeller without changing the structures of parts such as the impeller, a pump shaft and the like;
(3) The invention provides a disassembly and assembly tool for an on-board cooling water pump impeller of a diesel engine of a power station, wherein the top of the left end of an injection sleeve part is provided with an exhaust hole, so that gas generated in the relative movement process of the injection sleeve and a hydraulic cylinder can be effectively exhausted;
(4) The invention provides a disassembly and assembly tool for an on-board cooling water pump impeller of a diesel engine of a power station, wherein a middle joint part adopts a check valve structural design, so that the pressure of lubricating grease in the disassembly and assembly process can be effectively maintained;
(5) The invention provides a disassembly and assembly tool for an on-board cooling water pump impeller of a diesel engine of a power station, which is designed to be manually operated, does not need an external power supply or an air source, has strong operation controllability and high safety, and can be widely applied to disassembly and assembly of impellers of cold water pumps of the same type;
(6) The invention provides a method for disassembling and assembling an impeller of an on-board cooling water pump of a diesel engine of a power station, which can efficiently finish the disassembly and assembly of the impeller of the cooling water pump without causing any damage to parts such as the impeller, a pump shaft and the like.
Drawings
FIG. 1 is a schematic diagram of a power station diesel engine on-board cooling water pump impeller assembly and disassembly tools;
fig. 2 is a schematic structural view of a joint component in the disassembly and assembly tool of the on-board cooling water pump impeller of the diesel engine of the power station.
Wherein: 1-an injection sleeve; 2-a plunger; 3-a hydraulic cylinder; 4-a joint; 5-a hydraulic pipe; 6-sleeve nut; 7-a sphere; 8-a screw sleeve.
Detailed Description
The invention provides a disassembly and assembly tool and a disassembly and assembly method for an on-board cooling water pump impeller of a diesel engine of a power station, which are described in further detail below with reference to the accompanying drawings and specific embodiments.
As shown in FIG. 1, the invention provides a power station diesel engine onboard cooling water pump impeller dismounting tool, which comprises an injection sleeve 1, a plunger 2, a hydraulic cylinder 3, a joint 4, a hydraulic pipe 5 and a sleeve nut 6;
the injection sleeve 1 is cylindrical. The horizontal bisection surface of the left end of the injection sleeve 1 is provided with a radial through hole, the top is provided with an exhaust hole, the handle passes through the radial through hole, the central line of the injection sleeve 1 is positioned on the vertical central line of the handle, and the handle and the injection sleeve 1 are fixed together by welding; the right end of the injection sleeve 1 is hollow, and the inner surface of the hollow cavity is provided with internal threads;
the hydraulic cylinder 3 is in a stepped cylindrical shape, the inside of the hydraulic cylinder is hollow, an external thread is arranged at the left end of the outer surface of the hydraulic cylinder 3, an external hexagonal nut is arranged on the right side of the external thread, and an external thread is arranged on the right side of the external hexagonal nut; the left end and the right end of the hollow cavity of the hydraulic cylinder 3 are respectively provided with a step hole, the left step hole and the right step hole are concentric, and the inner diameter of the right step hole is larger than that of the left step hole;
the external thread at the left end of the hydraulic cylinder 3 is matched and connected with the internal thread at the right end of the injection sleeve 1;
the plunger 2 is a cylindrical optical axis, and the plunger 2 is inserted into the inner hollow cavity of the hydraulic cylinder 3 and penetrates through the left-end stepped hole until reaching the inner wall of the hollow cavity of the injection sleeve 1;
as shown in fig. 2, the joint 4 is in a stepped cylindrical shape, hollow in the interior, an outer hexagonal nut is arranged at the left end of the outer surface of the joint 4, and an outer thread is arranged at the right end. The left end and the right end of the hollow cavity of the connector 4 are respectively provided with a step hole, the inside of each hole is provided with an internal thread, the step hole at the left end is concentric with the step hole at the right end, the inside of the step hole at the right end is larger than the inside of the step hole at the left end, the step hole at the right end is internally provided with a sphere 7 and is connected with an external thread screw sleeve 8, the screw sleeve 8 is cylindrical, the left side is provided with a hollow cavity, the inside diameter of the hollow cavity is larger than the diameter of the sphere 7, and the outer surface of the screw sleeve 8 is provided with an axial groove;
the external thread at the right end of the hydraulic cylinder 3 is in fit connection with the internal thread at the left end of the hollow cavity of the joint 4;
the hydraulic pipe 5 is in a stepped cylindrical shape and hollow in the inside, an outer hexagonal nut is arranged at the left end of the outer surface of the hydraulic pipe 5, an outer thread is arranged on the right side of the outer hexagonal nut, a stepped shaft is arranged on the right side of the outer thread, and an outer thread is arranged on the right side of the stepped shaft;
the external thread at the right end of the joint 4 is in fit connection with the internal thread at the left side of the hollow cavity of the hydraulic pipe 5;
the sleeve nut 6 is a regular hexagonal cylinder, the inside of the sleeve nut is hollow, and an outer hexagonal nut is arranged on the outer surface of the sleeve nut 6. The left end and the right end of the hollow cavity of the sleeve nut 6 are respectively provided with a step hole, the left step hole and the right step hole are concentric, the inner diameter of the left step hole is larger than that of the right step hole, and the inner surface of the right step hole is provided with internal threads;
the external thread at the left end of the joint 4 is connected with the internal thread at the left end of the sleeve nut 6 in a matched manner, and the external thread at the right end of the hydraulic pipe 5 is connected with the internal thread at the right end of the sleeve nut 6 in a matched manner.
The invention provides a disassembly and assembly method of an on-board cooling water pump impeller of a diesel engine of a power station, which comprises the following steps:
step one: checking to confirm that the cooling water pump is horizontally placed and fixed firmly; removing the cock and the cock sealing gasket from the inlet cone, and discharging residual cooling water in the pump body cleanly; dismantling a connecting screw between the inlet cone and the pump body, and dismantling the inlet cone from the pump body; removing the inlet cone seal ring from the inlet cone; removing the impeller back cap from the left end of the pump shaft;
step two: smearing a proper amount of lubricant on the external thread of the hydraulic cylinder 3, mounting the injection sleeve 1 on the hydraulic cylinder 3 from the left side, rotating the handle of the injection sleeve 1 to push the injection sleeve 1 to move rightwards, and stopping rotating the handle of the injection sleeve 1 when the internal thread in the hollow cavity at the right end of the injection sleeve 1 is firmly screwed with the external thread at the left end of the hydraulic cylinder 3; a proper amount of lubricant is smeared on the outer cylindrical surface of the plunger 2, the plunger 2 is filled into the inner hollow cavity of the hydraulic cylinder 3 from the right side, and the plunger 2 is pushed to the bottom by using a push rod; filling grease into the stepped hole at the right end of the hydraulic cylinder 3 by using an oil injector; smearing a proper amount of lubricant on the external thread of the joint 4, loading the joint 4 into an inner hollow cavity on the left side of the hydraulic pipe 5 from the left side, fixing the hydraulic pipe 5, fastening a hexagonal nut outside the joint 4, and locking the joint 4 and the hydraulic pipe 5; smearing a proper amount of lubricant on the external thread of the hydraulic pipe 5, loading the joint 4 and the hydraulic pipe 5 assembly into the inner hollow cavity on the left side of the sleeve nut 6 from the left side, fixing the sleeve nut 6, and rotating the hydraulic pipe 5 to enable the external thread on the right side of the external hexagonal nut of the hydraulic pipe 5 to be screwed with the internal thread in the stepped hole on the right end of the sleeve nut 6; installing the joint 4, the hydraulic pipe 5 and the sleeve nut 6 assembly into an internal thread hollow cavity at the left end of a pump shaft, loosening and moving the sleeve nut 6 rightwards, stopping moving the sleeve nut 6 when the distance between the right end surface of the sleeve nut 6 and the left end surface of the impeller is equal to the movement distance required by the release pressure of the impeller, fixing the pump shaft, rotating the hexagon nut outside the hydraulic pipe 5, and locking the joint 4, the hydraulic pipe 5 assembly and the pump shaft; installing the injection sleeve 1, the plunger 2 and the hydraulic cylinder 3 into an internal thread hollow cavity at the left end of the joint 4, fixing the joint 4, rotating a hexagonal nut outside the hydraulic cylinder 3, and locking the injection sleeve 1, the plunger 2 and the hydraulic cylinder 3 with the joint 4, the hydraulic pipe 5 and the sleeve nut 6;
step three: rotating the handle of the injection sleeve 1 to push the injection sleeve 1 to move rightwards so as to pressurize lubricating grease in the hydraulic cylinder 3, pushing the ball body 7 in the hollow cavity of the joint 4 to move rightwards, enabling high-pressure lubricating grease to enter the hydraulic pipe 5 through an axial groove on the threaded sleeve 8 in the hollow cavity of the joint 4, then entering an axial oil passage and a radial oil passage in the pump shaft, expanding the inner diameter of the impeller, separating the impeller from the pump shaft, enabling the impeller to move leftwards, and enabling the left end face of the impeller to be attached to the right end face of the sleeve nut 6; loosening and moving the sleeve nut 6 leftwards, and stopping moving the sleeve nut 6 when the internal thread in the stepped hole at the right end of the sleeve nut 6 is screwed with the external thread at the right side of the hexagon nut outside the hydraulic pipe 5;
step four: integrally removing the impeller assembly and disassembly tool from the pump shaft;
step five: removing the impeller from the pump shaft, and removing the mechanical seal moving ring on the impeller; sequentially removing a stuffing box fastening screw and a stuffing box, removing a mechanical seal static ring positioning pin on the stuffing box, removing a mechanical seal static ring, and removing a stuffing box sealing ring on the stuffing box; cleaning all the disassembled parts, and drying by using compressed air; checking the state of the impeller, if the impeller has defects such as friction, cavitation and corrosion, repairing or replacing the impeller, and checking the state of the matching surface of the impeller and the pump shaft, if the impeller has defects such as corrosion and pull marks, repairing or replacing the impeller; replacing a stuffing box sealing ring, smearing a proper amount of lubricant, filling the stuffing box sealing ring into a groove on the stuffing box, replacing a mechanical sealing static ring, smearing a proper amount of lubricant, filling the mechanical sealing static ring into a stuffing box hollow cavity, and reinstalling a mechanical sealing static ring positioning pin; filling the stuffing box assembly into the pump body, and refilling the stuffing box fastening screw; replacing the mechanical seal moving ring, smearing a proper amount of lubricant, and mounting the mechanical seal moving ring on a step shaft on the right side of the impeller; mounting the impeller assembly to the pump shaft from the left end;
step six: installing the tool dismantled in the fourth step on the pump shaft, loosening and rightwards sleeving the sleeve nut 6, and stopping when the right end face of the sleeve nut 6 is attached to the left end face of the impeller; rotating the handle of the injection sleeve 1, pushing the injection sleeve 1 to move rightwards to pressurize lubricating grease in the hydraulic cylinder 3, pushing a ball body 7 in a hollow cavity of the joint 4 to move rightwards, enabling high-pressure lubricating grease to enter the hydraulic pipe 5 through an axial groove on a threaded sleeve 8 in the hollow cavity of the joint 4, then entering an axial oil passage and a radial oil passage in the pump shaft, expanding the inner diameter of an impeller, rotating a hexagonal nut outside the sleeve nut 6, moving the impeller rightwards, and stopping rotating the handle of the injection sleeve 1 when the left end face of the impeller is level with the left end face of an impeller mounting step shaft;
step seven: removing the injection sleeve 1, the plunger 2 and the hydraulic cylinder 3, and fastening a sleeve nut 6; removing the fitting 4 from the hydraulic pipe 5 to release the pressure in the hydraulic pipe 5; loosening and moving the sleeve nut 6 leftwards, and stopping moving the sleeve nut 6 when the internal thread in the stepped hole at the right end of the sleeve nut 6 is screwed with the external thread at the right side of the hexagon nut outside the hydraulic pipe 5;
step eight: cleaning lubricating grease at the outer thread of the left end of the pump shaft, and mounting an impeller back cap back to fasten the impeller back cap; replacing the inlet cone sealing ring, smearing a proper amount of lubricant, and loading the inlet cone sealing ring into a groove on the inlet cone; the inlet cone is reloaded on the pump body, and a connecting screw between the inlet cone and the pump body is reloaded; replacing the plug sealing gasket, and reinstalling the plug sealing gasket and the plug;
step nine: separating the injection sleeve 1, the plunger 2 and the hydraulic cylinder 3, separating the joint 4, the sleeve nut 6 and the hydraulic pipe 5, cleaning the injection sleeve 1, the plunger 2, the hydraulic cylinder 3, the joint 4, the hydraulic pipe 5 and the sleeve nut 6, and drying by compressed air; tool parts are cleaned up, rust-proof oil is smeared on the thread, the opening is plugged, tinfoil paper is used for packaging, the tool parts are stored in a special tool box, and drying agents are required to be placed in the tool box.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art who is skilled in the art to which the present invention pertains should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof within the scope of the present invention.
Claims (1)
1. The disassembly and assembly method of the power station diesel engine on-board cooling water pump impeller disassembly and assembly tool is based on the power station diesel engine on-board cooling water pump impeller disassembly and assembly tool, and comprises an injection sleeve (1), a plunger (2), a hydraulic cylinder (3), a connector (4), a hydraulic pipe (5) and a sleeve nut (6); the injection sleeve (1) is cylindrical, the right end of the injection sleeve (1) is hollow, and the inner surface of the hollow cavity is provided with internal threads; the hydraulic cylinder (3) is in a stepped cylindrical shape, the inside of the hydraulic cylinder is hollow, the left end of the outer surface of the hydraulic cylinder (3) is provided with external threads, the right side of the external threads is provided with external hexagonal nuts, and the right side of the external hexagonal nuts is provided with external threads; the left external thread of the hydraulic cylinder (3) is connected with the right internal thread of the injection sleeve (1) in a matching way; the plunger (2) is a cylindrical optical axis, and the plunger (2) is inserted into the inner hollow cavity of the hydraulic cylinder (3) and penetrates through the left-end stepped hole until reaching the inner wall of the hollow cavity of the injection sleeve (1); the joint (4) is in a stepped cylindrical shape, the inside of the joint is hollow, an outer hexagonal nut is arranged at the left end of the outer surface of the joint (4), and an outer thread is arranged at the right end of the joint; the external thread at the right end of the hydraulic cylinder (3) is matched and connected with the internal thread at the left end of the hollow cavity of the joint (4); the hydraulic pipe (5) is in a stepped cylindrical shape and hollow, an outer hexagonal nut is arranged at the left end of the outer surface of the hydraulic pipe (5), an outer thread is arranged on the right side of the outer hexagonal nut, a stepped shaft is arranged on the right side of the outer thread, and an outer thread is arranged on the right side of the stepped shaft; the external thread at the right end of the joint (4) is in fit connection with the internal thread at the left side of the hollow cavity of the hydraulic pipe (5); the sleeve nut (6) is a regular hexagonal cylinder, the inside of the sleeve nut is hollow, and an outer hexagonal nut is arranged on the outer surface of the sleeve nut (6); the horizontal bisection surface of the left end of the injection sleeve (1) is provided with a radial through hole, the top of the injection sleeve is provided with an exhaust hole, the handle penetrates through the radial through hole, the central line of the injection sleeve (1) is positioned on the vertical central line of the handle, and the handle and the injection sleeve (1) are fixed together through welding; the left end and the right end of the hollow cavity of the hydraulic cylinder (3) are respectively provided with a step hole, the left step hole and the right step hole are concentric, and the inner diameter of the right step hole is larger than that of the left step hole; the left end and the right end of the hollow cavity of the connector (4) are respectively provided with a step hole, the inside of each hole is provided with internal threads, the step holes at the left end and the right end are concentric, and the inner diameter of the step hole at the right end is larger than that of the step hole at the left end; a spherical body (7) is arranged in the step hole at the right end of the connector (4) and is connected with an external thread screw sleeve (8), the screw sleeve (8) is cylindrical, a hollow cavity is arranged at the left side, the inner diameter of the hollow cavity is larger than the diameter of the spherical body (7), and an axial groove is formed in the outer surface of the screw sleeve (8); the left end and the right end of the hollow cavity of the sleeve nut (6) are respectively provided with a step hole, the left step hole and the right step hole are concentric, the inner diameter of the left step hole is larger than that of the right step hole, and the inner surfaces of the right step hole are respectively provided with internal threads; the external thread at the left end of the joint (4) is in fit connection with the internal thread at the left end of the sleeve nut (6), and the external thread at the right end of the hydraulic pipe (5) is in fit connection with the internal thread at the right end of the sleeve nut (6); the method is characterized in that: the method comprises the following steps:
step one: checking to confirm that the cooling water pump is horizontally placed and fixed firmly; removing the cock and the cock sealing gasket from the inlet cone, and discharging residual cooling water in the pump body cleanly; dismantling a connecting screw between the inlet cone and the pump body, and dismantling the inlet cone from the pump body; removing the inlet cone seal ring from the inlet cone; removing the impeller back cap from the left end of the pump shaft;
step two: smearing a proper amount of lubricant on the external thread of the hydraulic cylinder (3), mounting the injection sleeve (1) on the hydraulic cylinder (3) from the left side, rotating the handle of the injection sleeve (1) to push the injection sleeve (1) to move rightwards, and stopping rotating the handle of the injection sleeve (1) when the internal thread in the hollow cavity at the right end of the injection sleeve (1) is firmly screwed with the external thread at the left end of the hydraulic cylinder (3); a proper amount of lubricant is smeared on the outer cylindrical surface of the plunger (2), the plunger (2) is filled into the inner hollow cavity of the hydraulic cylinder (3) from the right side, and the plunger (2) is pushed to the bottom by using a push rod; filling grease into the step hole at the right end of the hydraulic cylinder (3) by using an oil injector; smearing a proper amount of lubricant on the external thread of the joint (4), loading the joint (4) into an inner hollow cavity on the left side of the hydraulic pipe (5) from the left side, fixing the hydraulic pipe (5), fastening an external hexagonal nut of the joint (4), and locking the joint (4) and the hydraulic pipe (5); smearing a proper amount of lubricant on the external thread of the hydraulic pipe (5), loading the joint (4) and the hydraulic pipe (5) assembly into an inner hollow cavity on the left side of the sleeve nut (6) from the left side, fixing the sleeve nut (6), and rotating the hydraulic pipe (5) to enable the external thread on the right side of the external hexagonal nut of the hydraulic pipe (5) to be screwed with the internal thread in the stepped hole on the right end of the sleeve nut (6); installing a joint (4), a hydraulic pipe (5) and a sleeve nut (6) assembly into an internal thread hollow cavity at the left end of a pump shaft, loosening and moving the sleeve nut (6) rightward, stopping moving the sleeve nut (6) when the distance between the right end surface of the sleeve nut (6) and the left end surface of an impeller is equal to the movement distance required by the release pressure of the impeller, fixing the pump shaft, rotating a hexagon nut outside the hydraulic pipe (5), and locking the joint (4), the hydraulic pipe (5) assembly and the pump shaft; installing the injection sleeve (1), the plunger (2) and the hydraulic cylinder (3) into an internal thread hollow cavity at the left end of the joint (4), fixing the joint (4), rotating a hexagonal nut outside the hydraulic cylinder (3), and locking the injection sleeve (1), the plunger (2), the hydraulic cylinder (3) and the joint (4), the hydraulic pipe (5) and the sleeve nut (6);
step three: rotating the handle of the injection sleeve (1), pushing the injection sleeve (1) to move rightwards to pressurize lubricating grease in the hydraulic cylinder (3), pushing a spherical body (7) in a hollow cavity of the joint (4) to move rightwards, enabling high-pressure lubricating grease to enter the hydraulic pipe (5) through an axial groove on a screw sleeve (8) in the hollow cavity of the joint (4), then entering an axial oil duct and a radial oil duct in a pump shaft, expanding the inner diameter of an impeller, separating the impeller from the pump shaft, and enabling the left end face of the impeller to move leftwards to be attached to the right end face of a sleeve nut (6); loosening and moving the sleeve nut (6) leftwards, and stopping moving the sleeve nut (6) when the internal thread in the stepped hole at the right end of the sleeve nut (6) is screwed with the external thread at the right side of the external hexagonal nut of the hydraulic pipe (5);
step four: integrally removing the impeller assembly and disassembly tool from the pump shaft;
step five: removing the impeller from the pump shaft, and removing the mechanical seal moving ring on the impeller; sequentially removing a stuffing box fastening screw and a stuffing box, removing a mechanical seal static ring positioning pin on the stuffing box, removing a mechanical seal static ring, and removing a stuffing box sealing ring on the stuffing box; cleaning all the disassembled parts, and drying by using compressed air; checking the state of the impeller, if the impeller has defects such as friction, cavitation and corrosion, repairing or replacing the impeller, and checking the state of the matching surface of the impeller and the pump shaft, if the impeller has defects such as corrosion and pull marks, repairing or replacing the impeller; replacing a stuffing box sealing ring, smearing a proper amount of lubricant, filling the stuffing box sealing ring into a groove on the stuffing box, replacing a mechanical sealing static ring, smearing a proper amount of lubricant, filling the mechanical sealing static ring into a stuffing box hollow cavity, and reinstalling a mechanical sealing static ring positioning pin; filling the stuffing box assembly into the pump body, and refilling the stuffing box fastening screw; replacing the mechanical seal moving ring, smearing a proper amount of lubricant, and mounting the mechanical seal moving ring on a step shaft on the right side of the impeller; mounting the impeller assembly to the pump shaft from the left end;
step six: installing the tool dismantled in the fourth step on the pump shaft, loosening and rightwards sleeving the sleeve nut (6), and stopping when the right end surface of the sleeve nut (6) is attached to the left end surface of the impeller; rotating the handle of the injection sleeve (1), pushing the injection sleeve (1) to move rightwards to pressurize lubricating grease in the hydraulic cylinder (3), pushing a spherical body (7) in a hollow cavity of the joint (4) to move rightwards, enabling high-pressure lubricating grease to enter the hydraulic pipe (5) through an axial groove on a screw sleeve (8) in the hollow cavity of the joint (4), then entering an axial oil duct and a radial oil duct in a pump shaft, expanding the inner diameter of an impeller, rotating a hexagonal nut outside the sleeve nut (6), enabling the impeller to move rightwards, and stopping rotating the handle of the injection sleeve (1) when the left end face of the impeller is level with the left end face of an impeller mounting step shaft;
step seven: removing the injection sleeve (1), the plunger (2) and the hydraulic cylinder (3) components, and fastening a sleeve nut (6); removing the fitting (4) from the hydraulic tube (5) to release the pressure in the hydraulic tube (5); loosening and moving the sleeve nut (6) leftwards, and stopping moving the sleeve nut (6) when the internal thread in the stepped hole at the right end of the sleeve nut (6) is screwed with the external thread at the right side of the external hexagonal nut of the hydraulic pipe (5);
step eight: cleaning lubricating grease at the outer thread of the left end of the pump shaft, and mounting an impeller back cap back to fasten the impeller back cap; replacing the inlet cone sealing ring, smearing a proper amount of lubricant, and loading the inlet cone sealing ring into a groove on the inlet cone; the inlet cone is reloaded on the pump body, and a connecting screw between the inlet cone and the pump body is reloaded; replacing the plug sealing gasket, and reinstalling the plug sealing gasket and the plug;
step nine: separating the injection sleeve (1), the plunger (2) and the hydraulic cylinder (3), separating the joint (4), the sleeve nut (6) and the hydraulic pipe (5), cleaning the injection sleeve (1), the plunger (2), the hydraulic cylinder (3), the joint (4), the hydraulic pipe (5) and the sleeve nut (6), and drying by compressed air; tool parts are cleaned up, rust-proof oil is smeared on the thread, the opening is plugged, tinfoil paper is used for packaging, the tool parts are stored in a special tool box, and drying agents are required to be placed in the tool box.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245889.5A CN111267039B (en) | 2020-03-31 | 2020-03-31 | Disassembling tool and disassembling method for power station diesel engine on-board cooling water pump impeller |
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| CN202010245889.5A CN111267039B (en) | 2020-03-31 | 2020-03-31 | Disassembling tool and disassembling method for power station diesel engine on-board cooling water pump impeller |
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| CN113211377B (en) * | 2021-06-01 | 2023-05-02 | 重庆江增船舶重工有限公司 | Tool and method for disassembling air compressing impeller of turbocharger |
| CN114625187B (en) * | 2022-01-28 | 2024-02-13 | 华南师范大学 | High-precision temperature-controlled ultra-stable optical cavity |
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