CN117508503A - Press fitting and disassembling method for keyless rudder stock - Google Patents
Press fitting and disassembling method for keyless rudder stock Download PDFInfo
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- CN117508503A CN117508503A CN202311451952.0A CN202311451952A CN117508503A CN 117508503 A CN117508503 A CN 117508503A CN 202311451952 A CN202311451952 A CN 202311451952A CN 117508503 A CN117508503 A CN 117508503A
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- 238000000034 method Methods 0.000 title claims abstract description 96
- 230000008569 process Effects 0.000 claims abstract description 51
- 239000003921 oil Substances 0.000 claims description 66
- 239000010720 hydraulic oil Substances 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 18
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 239000010687 lubricating oil Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004040 coloring Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 13
- 230000007246 mechanism Effects 0.000 description 4
- 241000221037 Pyrularia pubera Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/60—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by the use of specific tools or equipment; characterised by automation, e.g. use of robots
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Robotics (AREA)
- Automatic Assembly (AREA)
Abstract
The invention discloses a press-fitting and disassembling method of a keyless rudder stock, relates to a press-fitting and disassembling method of a rudder stock, and particularly relates to a press-fitting and disassembling method of a keyless rudder stock. A press-fitting and disassembling method of a keyless rudder stock is characterized in that the press-fitting distance and the reading of an axial pressure gauge of the rudder stock are recorded in the press-fitting process of the rudder stock, an actual press-fitting straight line is fitted, and the wet press-fitting distance is calculated, so that the press-fitting distance reaches the total press-fitting distance required by the process; in the process of detaching the tiller, the hydraulic nut hydraulic pump is operated to inject oil into the hydraulic nut for pressurization, and the axial force of the hydraulic nut resists the instant impact force of detaching the tiller. Compared with the prior art, the invention has the advantages that: the standardization of the press-fitting and disassembly process of the tiller and the tiller is realized, so that the press-fitting and disassembly construction quality of the tiller and the tiller is ensured, and the press-fitting and disassembly operation efficiency and success rate of the tiller and the tiller are improved.
Description
Technical Field
The invention relates to a press-fitting and disassembling method of a rudder stock, in particular to a press-fitting and disassembling method of a keyless rudder stock.
Background
Currently, in order to ensure the operability of a ship during the operation of the ship, the ship can navigate along a predetermined heading and operate against a dock, steering mechanisms are configured on the ship such that the most steering mechanisms are rudder devices. The most important is a steering engine for providing power, wherein the steering engine is a machine for enabling a rudder system to move; the steering engine is a mechanism which is composed of a whole set of transmission mechanism, an electric motor, a hydraulic cylinder and a hydraulic pump system, and applies acting force to a rudder stock through a rudder stock to enable the rudder to rotate, so that the course of a ship is changed, and the operability of the ship is ensured. It can thus be seen that the mounting of the tiller and tiller is of great importance.
The conventional rudder stock and rudder stock mounting is divided into two ways, one is a keyless connection and the other is a keyed connection. The press-fitting and dismounting methods of the keyless rudder tiller of the prior art find many disadvantages in the actual operation process: the traditional press-fitting method of the tiller and the tiller in a keyless connection mode only needs to achieve 75% of the contact surface in the tiller and the tiller after being ground, and a reasonable press-fitting method is adopted, so that the theoretical press-in distance is achieved under the condition that the design pressure requirement is met, namely: the total press-in distance Lt of the rudder stock and the rudder stock is determined according to the required torque value of the ship, the actual rudder stock conical surface size and the rudder stock design, and a specific press-in method of the rudder stock and the rudder stock is not clear; the tiller and the tiller are easy to scratch due to the instantaneous impact force of the tiller being removed in the process of disassembling the tiller. When the rudder stock and the rudder stock are pressed and disassembled, the construction process of each construction party is different and only depends on the field experience of the construction party to carry out construction, so that the construction quality of the press fitting and the disassembly of the rudder stock and the rudder stock cannot be ensured, and the construction efficiency and the construction success rate of the press fitting and the disassembly of the rudder stock and the rudder stock are lower.
Disclosure of Invention
In order to effectively solve the technical problems, the invention provides a press-fitting and disassembling method of a keyless rudder stock, which comprises the following steps:
step one, preparation before press fitting:
the coloring of the rudder stock and the rudder hub ground surface of the rudder stock after grinding reaches 75% -90%;
the hydraulic oil of the tiller hydraulic pump is used for expanding the tiller rudder hub under the pressure action through a radial oil channel and an axial oil channel which are arranged on the rudder hub grinding surface, and an oil film is established in a conical surface where the tiller and the tiller rudder hub are contacted;
repairing and grinding the internal thread of the matched hydraulic nut and the external thread of the rudder stock by using oilstones and spraying lubricant;
cleaning grease, oil and rust on a rudder stock rudder hub grinding surface, a conical part of a rudder stock and a hydraulic nut;
hoisting the tiller, and enabling the tiller rudder hub to pass through the tiller at a speed of 1mm/s-3 mm/s;
a hydraulic nut is arranged at one end of the rudder stock, and the hydraulic nut is screwed until the hydraulic nut contacts with the upper end face of the rudder hub of the rudder stock;
connecting a hydraulic nut hydraulic pump and a tiller axial pressure gauge with a hydraulic nut through a high-pressure oil pipe, connecting the tiller hydraulic pump and a tiller radial pressure gauge with an oil filling port through the high-pressure oil pipe, checking whether an oil leakage phenomenon exists in a high-pressure oil pipe joint, and discharging air through an exhaust plug;
the other end of the rudder stock is axially symmetrically provided with two dial indicators with magnetic seats, pointers of the two dial indicators with the magnetic seats are propped against the lower end face of the rudder hub of the rudder stock, the two dial indicators with the magnetic seats are used for measuring displacement of the lower end part of the rudder hub of the rudder stock in the press mounting process, and coaxiality requirements of the rudder stock and the rudder stock in the press mounting process are ensured by calculating the difference of indication values of the two dial indicators with the magnetic seats in the press mounting process;
step two, press fitting:
calculating and determining the total pressed-in distance Lt required by the rudder stock and the rudder stock;
and (3) dry press fitting:
operating a hydraulic nut hydraulic pump to inject oil into the hydraulic nut until the axial pressure gauge of the tiller is 3-5 Mpa;
setting the dial indicator to be zero, and starting to measure the displacement of the lower end part of the rudder hub of the rudder stock in the press mounting process;
continuously operating the hydraulic nut hydraulic pump to oil and pressurize the hydraulic nut, wherein the piston ring of the hydraulic nut pushes the tiller to be pressed into the tiller, and the pressure value Pn of the tiller axial pressure gauge is recorded once every 0.25mm of the tiller is pressed into the tiller until the tiller is pressed into the tiller by 1.00mm; record 5 data points: comprising the following steps: the pressing distance of the rudder stock (17) pressing in the rudder stock (14) each time and the pressure value Pn of the rudder stock axial pressure gauge (9) of the rudder stock (14) pressing in the rudder stock (17) each time;
fitting an actual pressing-in straight line according to 5 data points, calculating an actual zero point L0 for the rudderstock to press in the rudderstock to start moving, obtaining a pressing-in distance L1 generated by initial pressure, and calculating the pressing-in distance L1 into a total pressing-in distance Lt;
record dry press fit distance lg=1 mm;
wet press fitting is carried out:
calculating the wet press-fitting distance, namely, ls=lt-Lg-L1|, calculating the number of times N of pressing the tiller into the tiller, wherein N=ls/1 mm, and recording the readings of an axial tiller hydraulic pump and the readings of a radial hydraulic nut hydraulic pump of the tiller once every 1mm of pressing;
operating a tiller hydraulic pump, radially pressurizing a tiller rudder hub through a high-pressure oil pipe and an oil injection port, and expanding the tiller rudder hub;
when the pressure value of the rudder stock axial pressure gauge is reduced, the hydraulic nut hydraulic pump starts to axially pressurize;
recording the distance of the rudder stock pressed into the rudder stock at intervals of 1mm in the process of pressing the rudder stock into the rudder stock, and reading a rudder stock axial pressure gauge, wherein P6 is the reading of the rudder stock axial pressure gauge when the distance of the rudder stock pressed into the rudder stock reaches 2mm, ln is the final distance recorded by the rudder stock pressed into the rudder stock, ln=lt- |L1|, and Pn is the reading of the rudder stock axial pressure gauge when the final distance recorded by the rudder stock pressed into the rudder stock reaches Ln;
when the final distance recorded by the rudder stock pressed into the rudder stock reaches Ln, removing the dial indicator, the high-pressure oil pipe, the hydraulic nut hydraulic pump and the rudder stock hydraulic pump;
installing a tiller oil filling port, a ventilation port and a screwed plug on a hydraulic nut, and finishing press fitting of the tiller and the tiller;
step three: and (3) disassembling:
unscrewing the hydraulic nut, wherein the displacement of the unscrewing hydraulic nut is lt+the buffer distance Lc, and Lc is 1mm-3mm;
operating the hydraulic nut hydraulic pump to inject oil and pressure into the hydraulic nut until the pressure value of the tiller axial pressure gauge is 20bar-30bar;
operating the tiller hydraulic pump to radially pressurize the tiller rudder hub so as to prop the tiller rudder hub open;
when the pressure value of the rudder stock axial pressure gauge is 1.05-1.20 times of Pn, the rudder stock slides from the rudder stock;
the hydraulic nut axial pressure is reduced until the tiller is disengaged from the tiller.
In the above-mentioned press-fitting and disassembling method of the keyless tiller, in the first step, when the ambient temperature T is 25 ℃ or more and T is not less than 20 ℃, the hydraulic oil of the tiller hydraulic pump (11) is selected to be L-HM68#, and when the ambient temperature T is 20 ℃ or more and T is not less than 10 ℃, the hydraulic oil of the tiller hydraulic pump (11) is selected to be L-HM46#.
In the above-mentioned press-fitting and disassembling method of keyless rudder stock, in the first step, the lubricating oil is MoS2 lubricating oil.
In the above-mentioned press-fitting and disassembling method of the keyless rudder stock, further, in the first step, the difference between the indication values of the two dial indicators (12) with magnetic seats in the press-fitting process is in the range of 0-2mm.
In the above-mentioned press-fitting and disassembling method of keyless rudder stock, further, in the second step, the hydraulic nut hydraulic pump is operated to inject oil into the hydraulic nut until the rudder stock axial pressure gauge shows 3Mpa.
In the above-mentioned press-fitting and disassembling method of the keyless rudder stock, further, in the second step, the hydraulic nut hydraulic pump is continuously operated to inject oil into the hydraulic nut for pressurization, and the speed of oil injection and pressurization is as follows: the reading of the tiller axial pressure gauge is increased by 1bar to 3bar per second.
In the second step, the fitting method used for fitting the actual pressed straight line according to the recorded 5 data points of 0mm,3mpa,0.25mm, p2,0.50mm, p3,0.75mm, p4,1.00mm, and p5 is as follows: least square method.
In the above-mentioned press-fitting and disassembling method of keyless tiller, further, in the second step, the axial tiller hydraulic pump is released and removed after maintaining the oil pressure for 15 minutes.
In the above-mentioned press-fitting and disassembling method of the keyless rudder stock, further, in the third step, the buffer distance Lc is 2mm.
In the above-mentioned press-fitting and disassembling method of the keyless rudder stock, further, in the third step, the speed of reducing the axial pressure of the hydraulic nut is: the reading of the tiller axial pressure gauge is reduced by 1bar to 3bar per second.
Compared with the prior art, the invention has the advantages that:
(1) In the press-fitting process of the keyless rudder stock, the press-fitting process record line is drawn by recording the press-fitting distance of the press-fitting rudder stock into the rudder stock and the pressure value Pn of the rudder stock axial pressure gauge 9 in the dry press-fitting process, the actual press-fitting straight line is fitted according to the press-fitting process record line, the actual zero point L0 of the rudder stock press-fitting rudder stock to start moving is calculated, the press-fitting distance L1 generated by the initial pressure is obtained, the total press-fitting distance Lt required by the process is calculated according to the calculated press-fitting, the wet press-fitting distance LS is calculated, when the wet press-fitting distance reaches LS, namely the final coordinate point recorded by the rudder stock press-fitting rudder stock reaches Ln, the final press-fitting distance reaches Lt is ensured, thereby ensuring the standardization of the process of the rudder stock press-fitting rudder stock, ensuring the construction quality of the rudder stock and the press-fitting of the rudder stock, the operation efficiency and the success rate of the rudder stock press-fitting rudder stock are greatly improved, the operation time of the rudder stock press-fitting rudder stock is shortened from original 4 to original 5 hours to 1 to 2 hours, and the operation success rate of the rudder stock press-fitting operation is improved from 80% to 100%.
(2) In the disassembly process of the keyless rudder stock, the hydraulic nut hydraulic pump is operated to carry out oiling pressurization on the hydraulic nut, the rudder stock hydraulic pump is operated to carry out radial pressurization on the rudder stock rudder hub, when the pressure value of the rudder stock axial pressure gauge is 1.05-1.20 times of Pn, the axial force of the hydraulic nut resists the instant impact force of the rudder stock disassembly, so that the rudder stock and the rudder stock are protected from being scratched in the disassembly process, the standardization of the disassembly process of the rudder stock and the rudder stock is ensured, and the construction quality of the disassembly of the rudder stock and the rudder stock is ensured. The efficiency and the success rate of the disassembly operation of the tiller and the rudder stock are greatly improved, the time of the disassembly operation of the tiller and the rudder stock is shortened from 1-2 hours to 0.5-1 hour, and the success rate of the disassembly operation of the tiller and the rudder stock is improved from 80% to 100%.
Drawings
FIG. 1 is a schematic illustration of the press-fit and disassembly of a keyless rudder stock tiller according to the present invention.
Fig. 2 is a top view of a tiller of the keyless tiller of the present invention in a press-fit and disassembly method.
Fig. 3 is a cross-sectional view of a front view of a tiller of a keyless tiller of the present invention in a press-fit and disassembly method.
Fig. 4 is a press-fitting process record line and a fitted actual press-in straight line of a press-fitting and disassembling method of a keyless rudder stock tiller according to the present invention.
In the figure: 2 is a rudder hub; 3 is an oil filling port; 4 is a ventilation port; 5 is a radial oil passage; 6 is an axial oil passage; 8 is a high pressure oil pipe; 10. a hydraulic nut hydraulic pump; 11 is a tiller hydraulic pump; 12 is a dial gauge; 13 is an exhaust plug; 14 is a rudder stock; 15 is a tiller radial pressure gauge; 16 is the press nut piston ring, 17 is the tiller, y1 is the actual press line fitted, and y2 is the press process log.
Detailed Description
PREFERRED EMBODIMENTS FOR CARRYING OUT THE INVENTION
FIG. 1 is a schematic illustration of the press-fit and disassembly of a keyless rudder stock tiller according to the present invention.
Fig. 2 is a top view of a tiller of the keyless tiller of the present invention in a press-fit and disassembly method.
Fig. 3 is a cross-sectional view of a front view of a tiller of a keyless tiller of the present invention in a press-fit and disassembly method.
Fig. 4 is a press-fitting process record line and a fitted actual press-in straight line of a press-fitting and disassembling method of a keyless rudder stock tiller according to the present invention.
In the figure: 2 is a rudder hub; 3 is an oil filling port; 4 is a ventilation port; 5 is a radial oil passage; 6 is an axial oil passage; 8 is a high pressure oil pipe; 10. a hydraulic nut hydraulic pump; 11 is a tiller hydraulic pump; 12 is a dial gauge; 13 is an exhaust plug; 14 is a rudder stock; 15 is a tiller radial pressure gauge; 16 is the press nut piston ring, 17 is the tiller, y1 is the actual press line fitted, and y2 is the press process log.
The press-fitting and disassembling method of the keyless rudder stock is characterized by comprising the following steps of:
step one, preparation before press fitting:
the coloring of the rudder stock 14 and the ground rudder hub 2 reaches 75-90%;
according to the environment temperature, selecting a hydraulic oil product of a tiller hydraulic pump 11, wherein the hydraulic oil acts to prop up the tiller rudder hub 2 under the pressure action through a radial oil duct 5 and an axial oil duct 6 which are arranged on the grinding surface of the tiller rudder hub 2, and an oil film is established in a conical surface where the tiller 14 and the tiller rudder hub 2 are in contact;
the hydraulic oil of the tiller hydraulic pump 11 is selected, and according to the characteristics of the hydraulic oil, the viscosity value changes along with the change of the environment temperature, and the viscosity of the hydraulic oil is one of key factors for suggesting an oil film. So, a suitable hydraulic oil product is selected according to the ambient temperature, as shown in table 1:
table 1 selection of hydraulic oil at different ambient temperatures
| Ambient temperature T DEG C | 60＞T＞25 | 25≥T≥20 | 20＞T≥10 | 0＜T＜10 |
| Hydraulic oil | L-HM100# | L-HM68# | L-HM46# | L-HM32# |
The internal thread of the matched hydraulic nut 7 and the external thread of the rudder stock 14 are polished by oilstones and sprayed with lubricant;
cleaning grease, oil and rust on the grinding surface of the rudder stock rudder hub 2 and the cone part of the rudder stock 14 and the hydraulic nut 7;
hoisting the tiller 17 and passing the tiller hub 2 through the tiller 14 at a speed of 1mm/s-3 mm/s;
a hydraulic nut 7 is arranged at one end of the rudder stock 14, and the hydraulic nut 7 is screwed until the hydraulic nut 7 contacts with the upper end surface of the rudder stock rudder hub 2;
the hydraulic nut hydraulic pump 10 and the tiller axial pressure gauge 9 are connected with the hydraulic nut 7 through the high-pressure oil pipe 8, the tiller hydraulic pump 11 and the tiller radial pressure gauge 15 are connected with the oil filling port 3 through the high-pressure oil pipe 8, whether oil leakage exists in a joint of the high-pressure oil pipe 8 is checked, and air is discharged through the exhaust plug 13;
the other end of the rudder stock 14 is axially symmetrically provided with two dial indicators 12 with magnetic seats, pointers of the two dial indicators 12 with magnetic seats are propped against the lower end face of the rudder stock rudder hub 2, the two dial indicators 12 with magnetic seats are used for measuring displacement of the lower end part of the rudder stock rudder hub 2 in the press mounting process, and coaxiality requirements of the rudder stock 14 and the rudder stock 17 in the press mounting process are ensured by calculating the difference of indication values of the two dial indicators 12 with magnetic seats in the press mounting process;
step two, press fitting:
calculating a total pressed-in distance Lt that determines the process requirements of the tiller 14 and the tiller 17;
and (3) dry press fitting:
operating the hydraulic nut hydraulic pump 10 to fill oil into the hydraulic nut 7 until the tiller axial pressure gauge 9 displays 3-5 Mpa;
setting the dial indicator 12 to zero, and starting to measure the displacement of the lower end part of the rudder stock rudder hub 2 in the press mounting process;
continuing to operate the hydraulic nut hydraulic pump 10 to oil and pressurize the hydraulic nut 7, pushing the tiller 17 to press into the tiller 14 by the oil nut piston ring 16, and recording the pressure value Pn of the tiller axial pressure gauge 9 once every 0.25mm of pressing into the tiller 17 until the tiller 141.00mm of pressing into the tiller;
from the recorded 5 data points (0 mm,3 MPa), (0.25 mm, P2), (0.50 mm, P3),
(0.75 mm, P4), (1.00 mm, P5) fitting an actual press-in straight line, calculating an actual zero point L0 at which the tiller 17 is pressed into the tiller 14 to start moving, obtaining a press-in distance L1 generated by an initial pressure, and accounting in the total press-in distance Lt;
record dry press fit distance lg=1 mm;
after the distance of the rudder stock 17 pressed into the rudder stock 14 reaches the total pressed-in distance Lt required by the process, the radial hydraulic nut hydraulic pump 10 is relieved to zero, and the radial hydraulic nut hydraulic pump 10 is dismantled;
the axial tiller hydraulic pump 11 is relieved and removed after maintaining the oil pressure for 10-18 minutes;
wet press fitting is carried out:
calculating the wet press-fitting distance ls=lt-Lg-L1|, calculating the number of times N that the tiller 14 is pressed into the tiller 17, n=ls/1 mm, and recording the readings of the axial tiller hydraulic pump 11 and the radial hydraulic nut hydraulic pump 10 of the tiller 17 once every 1mm of pressing;
operating the tiller hydraulic pump 11, radially pressurizing the tiller rudder hub 2 through the high-pressure oil pipe 8 and the oil filling port 3, and expanding the tiller rudder hub 2;
when the pressure value of the rudder stock axial pressure gauge 9 is reduced, the hydraulic nut hydraulic pump 10 starts to axially pressurize;
recording the distance the rudder stock 14 is pressed into the rudder stock 17 and the reading of the rudder stock axial pressure gauge 9 at intervals of 1mm during the pressing of the rudder stock 14 into the rudder stock 17, marking coordinate points (2, P6) … (Ln, pn), P6 being the reading of the rudder stock axial pressure gauge 9 when the distance the rudder stock 14 is pressed into the rudder stock 17 reaches 2mm, ln being the final distance the rudder stock 14 is pressed into the rudder stock 17, ln=lt- & gtl 1 | Pn being the reading of the rudder stock axial pressure gauge 9 when the final distance the rudder stock 14 is pressed into the rudder stock 17 reaches Ln;
when the final distance recorded by the rudder stock 14 pressed into the rudder stock 17 reaches Ln, the dial indicator 12, the high-pressure oil pipe 8, the hydraulic nut hydraulic pump 10 and the rudder stock hydraulic pump 11 are removed;
installing the screw plugs on the tiller oil filling port 3, the air vent port 4 and the hydraulic nut 7, and finishing the press fitting of the tiller 17 and the tiller 14;
step three: and (3) disassembling:
unscrewing the hydraulic nut 7, wherein the displacement of unscrewing the hydraulic nut 7 is lt+ and the buffer distance Lc is 1mm-3mm;
operating the hydraulic nut hydraulic pump 10 to fill oil into the hydraulic nut 7 for pressurization until the pressure value of the tiller axial pressure gauge 9 is 20bar-30bar;
the tiller hydraulic pump 11 is operated to radially pressurize the tiller rudder hub 2 so as to prop up the tiller rudder hub 2;
when the pressure value of the tiller axial pressure gauge 9 is 1.05-1.20 times of Pn, the tiller 2 slides from the tiller 14;
the hydraulic nut 7 axial pressure is reduced until the tiller 2 is disengaged from the tiller 14.
In the first step, when the ambient temperature is 20-25 ℃, the hydraulic oil of the tiller hydraulic pump 11 is selected to be L-HM68#, and when the ambient temperature is 10-20 ℃, the hydraulic oil of the tiller hydraulic pump 11 is selected to be L-HM46#.
In the first step, moS2 lubricating oil is used as the lubricating oil.
In the first step, the difference of indication values of the two dial indicators (12) with the magnetic seats in the press mounting process is in the range of 0-2mm.
In the second step, the hydraulic nut hydraulic pump 10 is operated to fill the hydraulic nut 7 with oil until the tiller axial pressure gauge 9 is shown as 3Mpa.
In the second step, the hydraulic nut hydraulic pump 10 is continuously operated to inject oil into the hydraulic nut 7 for pressurization, and the speed of oil injection and pressurization is as follows: the reading of the tiller axial pressure gauge 9 is increased by 1bar-3bar per second.
In the second step, according to the recorded 5 data points (0 mm,3 MPa), (0.25 mm, P2),
(0.50 mm, P3), (0.75 mm, P4), (1.00 mm, P5) the fitting method used to fit the actual pressed straight line is: least square method.
In the second step, the axial tiller hydraulic pump 11 is released and removed after maintaining the oil pressure for 15 minutes. The static pressure is maintained for 15 minutes in order to ensure a tight coupling of the tiller 17 and tiller 14.
In the third step, the buffer distance Lc is 2mm. Lc is too long, and a large instant impact force can cause damage to the hydraulic nut 7; too short Lc distance results in no mounting/dismounting space for the tiller 17 and it is impossible to determine whether the tiller 17 is removed.
In the third step, the speed of reducing the axial pressure of the hydraulic nut (7) is as follows: the reading of the tiller axial pressure gauge (9) is reduced by 1bar-3bar per second.
In summary, the invention provides a press-fitting and disassembly method for a keyless rudder stock, which is characterized in that in the press-fitting process of the keyless rudder stock, the distance of the rudder stock pressed into the rudder stock and the pressure value Pn of a rudder stock axial pressure gauge 9 are recorded in the dry press-fitting process, a press-fitting process recording line is drawn, an actual press-fitting straight line is fitted according to the press-fitting process recording line, an actual zero point L0 of the rudder stock pressed into the rudder stock to start moving is calculated, the press-fitting distance L1 generated by initial pressure is obtained, the total press-fitting distance Lt required by the process is obtained according to the calculated press-fitting, so that the calculated wet press-fitting distance Ls is obtained, and when the wet press-fitting distance reaches Ls, namely, when the final coordinate point recorded by the rudder stock pressed into the rudder stock reaches Ln, the final press-fitting distance is ensured, the standardization of the process of the rudder stock pressed into the rudder stock is realized, and the construction quality of the press-fitting of the rudder stock is ensured. Meanwhile, in the press-fitting process: two dial indicators 12 with magnetic seats are symmetrically arranged on the rudder stock 14 and used for measuring displacement of the lower end part of the rudder hub 2 of the rudder stock in the press mounting process and whether the rudder hub 2 of the rudder stock is inclined in the displacement process, and when readings of the two dial indicators 12 with magnetic seats in the press mounting process are inconsistent and the difference is overlarge, coaxiality of the rudder stock 17 and the rudder stock 14 is required to be timely adjusted so as to ensure the construction quality of the press mounting of the rudder stock and the rudder stock; the operation efficiency and success rate of pressing the tiller into the tiller are greatly improved.
In the disassembly process of the keyless tiller, the hydraulic nut hydraulic pump is operated to carry out oiling pressurization on the hydraulic nut, the tiller hydraulic pump is operated to carry out radial pressurization on the tiller rudder hub, when the pressure value of the tiller axial pressure gauge is 1.05-1.20 times of Pn, the axial force of the hydraulic nut resists the instant impact force of the tiller disassembly, so that the tiller and the tiller are protected from being scratched in the disassembly and assembly process, the standardization of the tiller and the tiller disassembly process is realized, and the construction quality of the tiller and the tiller disassembly is ensured. The disassembly operation efficiency and success rate of the rudderstock and the rudderstock are greatly improved.
Claims (10)
1. The press-fitting and disassembling method of the keyless rudder stock is characterized by comprising the following steps of:
step one, preparation before press fitting:
the coloring of the rudder stock (14) and the ground rudder hub (2) reaches 75-90%;
the hydraulic oil of the tiller hydraulic pump (11) is used for expanding the tiller rudder hub (2) under the action of pressure through a radial oil duct (5) and an axial oil duct (6) which are arranged on the grinding surface of the tiller rudder hub (2), and an oil film is established in a conical surface where the tiller (14) and the tiller rudder hub (2) are contacted;
repairing and grinding the internal thread of the matched hydraulic nut (7) and the external thread of the rudder stock (14) by using oilstones and spraying lubricant;
cleaning grease, oil and rust on the grinding surface of the rudder stock rudder hub (2) and the cone part of the rudder stock (14) and the hydraulic nut (7);
hoisting the rudder stock (17), wherein the rudder stock rudder hub (2) ground surface passes through the rudder stock (14) at a speed of 1mm/s-3 mm/s;
installing a hydraulic nut (7) to one end of the rudder stock (14), and screwing the hydraulic nut (7) until the hydraulic nut (7) is in contact with the upper end surface of the rudder hub (2);
the hydraulic nut hydraulic pump (10) and the rudder stock axial pressure gauge (9) are connected with the hydraulic nut (7) through the high-pressure oil pipe (8);
the rudder stock hydraulic pump (11) and the rudder stock radial pressure gauge (15) are connected with the oil filling port (3) through the high-pressure oil pipe (8), whether oil leakage exists at a joint of the high-pressure oil pipe (8) is checked, and air is discharged through the exhaust plug (13);
two dial indicators (12) with magnetic seats are axially symmetrically arranged at the other end of the rudder stock (14), and pointers of the two dial indicators (12) with the magnetic seats are propped against the lower end face of the rudder hub (2);
the two dial indicators (12) with the magnetic seats are used for measuring the displacement of the lower end part of the rudder stock rudder hub (2) in the press fitting process, and the coaxiality requirement of the rudder stock (14) and the rudder stock (17) in the press fitting process is ensured by calculating the difference of indication values of the two dial indicators (12) with the magnetic seats in the press fitting process;
step two, press fitting:
and (3) dry press fitting:
operating a hydraulic nut hydraulic pump (10) to inject oil into the hydraulic nut (7) until the rudder stock axial pressure gauge (9) displays 3Mpa to 5Mpa;
setting the dial indicator (12) to zero, and starting to measure the displacement of the lower end part of the rudder hub (2) of the rudder stock in the press mounting process;
continuously operating the hydraulic nut hydraulic pump (10) to inject hydraulic oil into the hydraulic nut (7) for pressurizing, and pushing the tiller (17) to be pressed into the tiller (14) by the hydraulic nut piston ring (16);
the tiller (17) is pressed into the tiller (14), and the pressure value Pn of the tiller axial pressure gauge (9) is recorded once every 0.25mm is pressed into the tiller (17) until the tiller (14) is pressed into the tiller (14) by 1.00mm; record 5 data points: comprising the following steps: the pressing distance of the rudder stock (17) pressing in the rudder stock (14) each time and the pressure value Pn of the rudder stock axial pressure gauge (9) of the rudder stock (14) pressing in the rudder stock (17) each time;
fitting an actual pressing-in straight line according to 5 data points, and calculating an actual zero point L0 for the rudder stock (14) to start moving when the rudder stock (17) is pressed in to obtain a pressing-in distance L1 generated by initial pressure;
record dry press fit distance lg=1 mm;
wet press fitting is carried out:
calculating the wet press-fitting distance ls=lt-Lg-L1|, calculating the number of times N of pressing the tiller (14) into the tiller (17), n=ls/1 mm, and recording the readings of the axial tiller hydraulic pump (11) and the radial hydraulic nut hydraulic pump (10) of the tiller (17) once every 1mm of pressing;
operating a tiller hydraulic pump (11), radially pressurizing a tiller rudder hub (2) through a high-pressure oil pipe (8) and an oil injection port (3), and expanding the tiller rudder hub (2);
when the pressure value of the rudder stock axial pressure gauge (9) is reduced, the hydraulic nut hydraulic pump (10) starts to axially pressurize;
during the pressing of the tiller (14) into the tiller (17), the distance of the tiller (14) pressed into the tiller (17) and the reading of the tiller axial pressure gauge (9) are recorded every 1mm distance,
wherein: p6 is the reading of the tiller axial pressure gauge (9) when the distance of the tiller (14) pressed into the tiller (17) reaches 2mm, and Ln is the final distance recorded by the tiller (14) pressed into the tiller (17); pn is the reading of the tiller axial pressure gauge (9) when the final distance recorded by the tiller (14) being pressed into the tiller (17) reaches Ln;
when the final distance recorded by the rudder stock (14) pressed into the rudder stock (17) reaches Ln, the two dial indicators (12) with the magnetic seats, the high-pressure oil pipe (8), the hydraulic nut hydraulic pump (10) and the rudder stock hydraulic pump (11) are disassembled;
a screw plug on the tiller oil filling port (3), the ventilation port (4) and the hydraulic nut (7) is arranged, and the press fitting of the tiller (17) and the tiller (14) is finished;
step three: and (3) disassembling:
unscrewing the hydraulic nut (7), wherein the displacement of the unscrewing hydraulic nut (7) is lt+ and the buffer distance Lc is 1mm-3mm;
operating the hydraulic nut hydraulic pump (10) to pressurize the hydraulic nut (7) by injecting hydraulic oil until the pressure value of the tiller axial pressure gauge (9) is 20bar-30bar;
the rudder stock hydraulic pump (11) is operated to radially pressurize the rudder stock rudder hub (2) so as to prop up the rudder stock rudder hub (2);
when the pressure value of the rudder stock axial pressure gauge (9) is 1.05-1.20 times of Pn, the rudder stock (2) slides from the rudder stock (14);
reducing the axial pressure of the hydraulic nut (7) until the tiller (2) is disengaged from the tiller (14);
the disassembly of the tiller (17) and the tiller (14) is completed.
2. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the first step, when the ambient temperature T is 25 ℃ or more and T is 20 ℃ or more, the hydraulic oil of the tiller hydraulic pump (11) is L-HM68#, and when the ambient temperature T is 20 ℃ or more and T is 10 ℃ or more, the hydraulic oil of the tiller hydraulic pump (11) is L-HM46#.
3. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the first step, moS2 lubricating oil is used as the lubricating oil.
4. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the first step, the difference of indication values of the two dial indicators (12) with the magnetic seats in the press mounting process is in the range of 0-2mm.
5. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the second step, a hydraulic nut hydraulic pump (10) is operated to fill oil into the hydraulic nut (7) until the rudder stock axial pressure gauge (9) is displayed as 3Mpa.
6. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the second step, the hydraulic nut hydraulic pump (10) is continuously operated to inject hydraulic oil into the hydraulic nut (7) for pressurizing, and the pressurizing speed of the hydraulic oil injection is as follows: the reading of the tiller axial pressure gauge (9) is increased by 1bar-3bar per second.
7. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the second step, the actual pressing line is fitted according to 5 data points, and the fitting method is as follows: least square method.
8. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the second step, the axial tiller hydraulic pump (11) is released and removed after maintaining the oil pressure for 15 minutes.
9. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the third step, the buffer distance Lc is 2mm.
10. A method of press fitting and removal of a keyless rudder stock as claimed in claim 1, wherein: in the third step, the speed of reducing the axial pressure of the hydraulic nut (7) is as follows: the reading of the tiller axial pressure gauge (9) is reduced by 1bar-3bar per second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451952.0A CN117508503A (en) | 2023-11-03 | 2023-11-03 | Press fitting and disassembling method for keyless rudder stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451952.0A CN117508503A (en) | 2023-11-03 | 2023-11-03 | Press fitting and disassembling method for keyless rudder stock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117508503A true CN117508503A (en) | 2024-02-06 |
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ID=89754217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311451952.0A Pending CN117508503A (en) | 2023-11-03 | 2023-11-03 | Press fitting and disassembling method for keyless rudder stock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117508503A (en) |
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2023
- 2023-11-03 CN CN202311451952.0A patent/CN117508503A/en active Pending
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