Method for dismounting and quickly resetting marine intermediate bearing

Abstract

The application relates to the technical field of a marine shafting, and discloses a method for dismounting and quickly resetting a marine intermediate bearing, which is characterized in that a shaft supporting roller is connected to the lifting end of a jack, and is used for supporting an intermediate shaft and transferring stress of the intermediate shaft during the process of dismounting the intermediate bearing. The initial position of the intermediate shaft is calibrated by a shaft positioning dial gauge, and the stress transfer condition of the intermediate shaft and the position change condition of the intermediate bearing are detected by a bearing dial gauge. The method for dismounting and quickly resetting the marine intermediate bearing is simple and quick, the process is controllable, the intermediate bearing can be quickly reset, the on-site construction personnel can be facilitated to operate, and a large amount of construction time can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship shafting, in particular to a method for dismounting and quickly resetting a marine intermediate bearing. BACKGROUND

[0002] The intermediate bearing is an important component of the ship shafting, and plays a role of connecting each intermediate shaft in the main power system. Its installation precision is directly related to whether the ship shafting can normally operate, and is related to the use effect of the main power system of the ship. In the process of installing the ship shafting, when the centering is completed and the hinging of part of the main power equipment is completed, if the intermediate bearing equipment needs to be dismounted due to problems, directly dismounting will cause the stress change of the ship shafting, and generally the entire shafting needs to be re-centered and hinged, which seriously affects the quality and speed of shipbuilding. SUMMARY

[0003] The present application provides a method for dismounting and quickly resetting a marine intermediate bearing, which can monitor the change of the shafting during the dismounting of the intermediate bearing and can quickly reset the intermediate bearing, so as to ensure that the influence of dismounting on the shafting is controlled within a controllable range, the entire shafting does not need to be dismounted, and the intermediate bearing can be ensured to return to the original stress state after being remounted.

[0004] In order to achieve the above-mentioned purpose, the present application provides a method for dismounting and quickly resetting a marine intermediate bearing, which quickly dismounts the intermediate bearing through a dismounting assembly, wherein the dismounting assembly comprises a jack, a shaft supporting roller, a bearing dial gauge for being placed at the intermediate bearing, and a shaft positioning dial gauge for being placed at the intermediate shaft, the shaft supporting roller is connected to the lifting end of the jack, and the outer peripheral wall of the intermediate shaft and the inner peripheral wall of the intermediate bearing have a predetermined maximum gap.

[0005] The initial position of the intermediate shaft is marked, the shaft supporting roller supports the intermediate shaft at the position corresponding to the intermediate bearing to be dismounted, the rollers on both sides of the shaft supporting roller need to be in contact with the intermediate shaft, the shaft positioning dial gauges are respectively arranged on the left side and the right side of the intermediate shaft, the value of the shaft positioning dial gauges is recorded as the initial value of shaft positioning, so as to mark the initial position of the intermediate shaft, and the shaft positioning dial gauges remain unchanged during the dismounting process.

[0006] The initial position of the bearing is marked, the bearing dial gauges are respectively arranged on both sides of the upper end of the intermediate bearing in the axial direction, the initial value of the bearing positioning of the bearing dial gauges is recorded, and the assembly position of the intermediate bearing on the base is marked; on the base of the intermediate bearing to be dismounted, the front and rear positions of the intermediate bearing on the base are marked, that is, a mark is made on the base to facilitate the installation at the same position during the remounting, and generally a line is drawn.

[0007] The jack lifts up the middle shaft through the supporting shaft roller. When the values of the bearing dial gauges on both sides are greater than or equal to the maximum value of the predetermined gap, the lifting end of the jack stops rising. The bearing dial gauge that first jumps is the marker dial gauge. The value of the marker dial gauge is recorded as the reset value. The middle bearing is removed.

[0008] The bearing reinstallation step moves the disassembled middle bearing to the marked assembly position. The middle shaft and the middle bearing are preliminarily assembled. The value of the marker dial gauge is adjusted to the reset value.

[0009] The reset step synchronously lowers the middle shaft and the middle bearing through the jack. When the value of the shaft positioning dial gauge returns to the shaft positioning initial value and the value of the bearing dial gauge returns to the bearing positioning initial value, the middle bearing is assembled and fixed, and the reset is completed.

[0010] As a preferred solution, before the middle shaft initial position calibration step, a pre-checking step is further included. A plug gauge with a thickness equal to the maximum value of the predetermined gap is used. The predetermined gap is between the outer circumferential wall of the middle shaft and the inner circumferential wall of the middle bearing. The plug gauge is inserted towards the predetermined gap. The plug gauge is not inserted into the predetermined gap.

[0011] As a preferred solution, in the stress transfer and removal step, when the value of the marker dial gauge is greater than or equal to the maximum value of the predetermined gap, the lifting speed of the jack is reduced and the lifting is continued.

[0012] As a preferred solution, in the bearing reinstallation step, the lower half of the middle bearing is moved below the middle shaft and to the journal position.

[0013] As a preferred solution, in the reinstallation step, the predetermined gaps of the upper part, the left side and the right side of the other middle bearings are rechecked. A plug gauge with a thickness equal to the maximum value of the predetermined gap is used. The plug gauge is inserted towards the predetermined gap. The plug gauge is not inserted into the predetermined gap.

[0014] As a preferred solution, in the reinstallation step, the lifting bolts are arranged in the lower part of the middle bearing.

[0015] As a preferred solution, in the resetting step, the force on the shaft roller is transferred to the jacking bolt.

[0016] As a preferred solution, after the resetting step, a resetting adjustment step is further included, the corresponding predetermined gap of the intermediate bearing after resetting is checked, a feeler gauge with a thickness equal to the maximum value of the predetermined gap is used to try to insert the feeler gauge towards the predetermined gap, and the sum of the left gap and the right gap is the total gap, the left gap or the right gap is 40%-60% of the total gap.

[0017] As a preferred solution, after the resetting adjustment step, a fixing step is further included, the intermediate bearing after resetting is fixed through the connecting piece, and the shaft roller is removed.

[0018] As a preferred solution, in the force transferring and removing step, the adjusting pad is knocked loose and removed to facilitate the removal of the intermediate bearing.

[0019] After the fixing step, the adjusting pad is reloaded.

[0020] Compared with the prior art, the method for disassembling and quickly resetting the marine intermediate bearing has the beneficial effects that: the shaft roller is connected to the lifting end of the jack, used for supporting the intermediate shaft during the disassembly and assembly of the intermediate bearing, and transferring the force to the intermediate shaft. The initial position of the intermediate shaft is calibrated by the shaft positioning dial gauge, the force transfer of the intermediate shaft is determined by the bearing dial gauge, and the position change of the intermediate bearing is detected. The resetting method is simple and quick, the process is controllable, the intermediate bearing can be quickly reset, the on-site construction personnel can operate conveniently, and a large amount of construction time is saved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the front view of the overall structure of the embodiment of the present application.

[0022] Figure 2 is the side view of the shaft roller supporting the intermediate shaft of the embodiment of the present application.

[0023] Figure 3 is the front view of the shaft roller supporting the intermediate shaft of the embodiment of the present application.

[0024] Figure 4 is the placement side view of the shaft positioning dial gauge and the bearing dial gauge of the embodiment of the present application.

[0025] Figure 5 is the placement front view of the shaft positioning dial gauge of the embodiment of the present application.

[0026] Figure 6 is the side view of the overall structure of the embodiment of the present application.

[0027] In the drawings:

[0028] 10, intermediate shaft;

[0029] 20, intermediate bearing;

[0030] 30, jack; 31, shaft supporting roller; 32, shaft positioning dial gauge; 33, bearing dial gauge;

[0031] 40, base; 41, adjusting pad; 42, fixed pad; 43, predetermined gap. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like as used herein refer to the positions or relative positions of the apparatus or elements shown in the drawings, and are for convenience only, and are not intended to limit or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

[0034] In the description of the present application, it should be understood that the terms "connected", "connected", "fixed" and the like in the present application should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be weldedly connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specified. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] As Figures 1 to 6 shown, the method for disassembling and quickly resetting the marine intermediate bearing of the preferred embodiment of the present application comprises the following steps:

[0036] The initial position of the intermediate shaft 10 is calibrated, as Figures 2 to 3As shown, the shaft supporting roller 31 supports the intermediate shaft 10 at the position corresponding to the intermediate bearing 20 to be removed, and Figures 4 to 5 As shown, the shaft positioning dial gauges 32 are placed on the left and right sides of the intermediate shaft 10, and the values of the shaft positioning dial gauges 32 are recorded as the initial values of the shaft positioning, so as to mark the initial position of the intermediate shaft 10, and the shaft positioning dial gauges 32 remain unchanged during the dismounting process;

[0037] As an embodiment, the initial position of the shaft positioning dial gauges 32 is marked on the intermediate shaft 10, so that the position of the shaft positioning dial gauges 32 coincides with the marked initial position of the shaft positioning on the intermediate shaft 10 after the resetting, thereby improving the resetting accuracy.

[0038] The initial position of the bearing is calibrated, as shown Figures 4 to 5 As shown, the bearing dial gauges 33 are placed on the two axial sides of the upper end of the intermediate bearing 20, and the initial values of the bearing positioning of the bearing dial gauges 33 are recorded, and the assembly position of the intermediate bearing 20 is marked on the base 40;

[0039] As an embodiment, the initial position of the bearing dial gauges 33 is marked on the intermediate bearing 20, so that the bearing dial gauges 33 are reset according to the initial position of the bearing dial gauges 33 after the intermediate bearing 20 is reassembled, thereby improving the resetting accuracy of the intermediate bearing 20.

[0040] The force is transferred and removed, the jack 30 lifts the intermediate shaft 10 through the shaft supporting roller 31, when the values of the bearing dial gauges 33 on both sides are greater than or equal to the maximum value of the predetermined gap 43, the lifting end of the jack 30 stops rising, so as to ensure that the force of the intermediate shaft 10 is completely transferred to the shaft supporting roller 31, the bearing dial gauge 33 with the first jumping value is the marking dial gauge, the value of the marking dial gauge is recorded as the resetting value, and the intermediate bearing 20 is removed;

[0041] The bearing is reassembled, the intermediate bearing 20 after dismounting is moved to the marked assembly position, the intermediate shaft 10 and the intermediate bearing 20 are preliminarily assembled, and the value of the marking dial gauge is adjusted to the resetting value;

[0042] The resetting step, the intermediate shaft 10 and the intermediate bearing 20 are synchronously lowered and reset by the jack 30, when the value of the shaft positioning dial gauge 32 returns to the initial value of the shaft positioning, and the value of the bearing dial gauge 33 returns to the initial value of the bearing positioning from the resetting value, the intermediate bearing 20 is assembled and fixed, and the resetting is completed.

[0043] The method for dismounting and quickly resetting the marine intermediate bearing of the application is characterized in that the shaft supporting roller 31 is connected to the lifting end of the jack 30, and is used to support the intermediate shaft 10 and transfer the force of the intermediate shaft 10 during the dismounting of the intermediate bearing 20. The initial position of the intermediate shaft 10 is calibrated by the shaft positioning dial gauge 32, and the force transfer of the intermediate shaft 10 and the position change of the intermediate bearing 20 are determined by the bearing dial gauge 33. The resetting method of the application is simple and quick, the process is controllable, the intermediate bearing 20 can be quickly reset, the on-site construction personnel can operate conveniently, and a large amount of construction time can be saved.

[0044] As one of the embodiments, the shaft positioning dial gauge 32 is placed at the upper end of the intermediate shaft 10 during the initial position calibration step of the intermediate shaft 10.

[0045] As one of the embodiments, the supporting position of the shaft supporting roller 31 on the intermediate shaft 10 can be the front or rear end of the intermediate shaft 10 in the axial direction, and the supporting position of the shaft supporting roller 31 on the intermediate shaft 10 can support and transfer the force of the intermediate shaft 10.

[0046] Further, as shown in Figure 1 Before the initial position calibration step of the intermediate shaft 10, the pre-checking step is further included, the plug gauge with a thickness equal to the maximum value of the predetermined gap 43 is used, the intermediate shaft 10 and the intermediate bearing 20 have the predetermined gap 43 between the outer peripheral wall of the intermediate shaft 10 and the inner peripheral wall of the intermediate bearing 20, the plug gauge is inserted towards the predetermined gap 43, and the plug gauge is not inserted into the predetermined gap 43. The pre-checking step is used to ensure that the shafting gap is within the normal predetermined range, and the position relationship between the intermediate bearing 20 and the intermediate shaft 10 before dismounting is within the normal range.

[0047] Further, in the force transfer dismounting step, when the value of the dial gauge is greater than or equal to the maximum value of the predetermined gap 43, the lifting speed of the jack 30 is reduced and the lifting is continued. At this time, since the force of the intermediate shaft 10 on the intermediate bearing 20 has been partially transferred to the shaft supporting roller 31, the lifting speed is reduced to reduce the value change speed of the bearing dial gauge 33 on the other side, improve the force transfer stability of the intermediate shaft 10, and avoid excessive lifting.

[0048] Further, in the bearing reinstallation step, the lower half of the intermediate bearing 20 is moved to the lower side of the intermediate shaft 10 and to the journal position, and the bearing is moved to the preliminary position for assembly, so as to prepare for the reinstallation of the bearing.

[0049] Further, in the reassembling step, the predetermined gap 43 of the upper part, left side and right side of the coaxial other intermediate bearing 20 is rechecked, a plug gauge with a thickness equal to the maximum value of the predetermined gap 43 is inserted into the predetermined gap 43, and the reassembling is completed when the plug gauge cannot be inserted into the predetermined gap 43. Before the intermediate bearing 20 is reassembled, it is ensured that the predetermined gap 43 of the other intermediate bearing 20 is within the normal range, and the overall performance after reassembling is ensured to be qualified. In this case, because of the characteristics of the shafting, the intermediate shaft 10 is generally located at the bottom of the bearing, and the bottom gap is generally 0, and the upper gap and the left and right gaps are mainly measured.

[0050] As one of the embodiments, the maximum value of the predetermined gap 43 is 0.05 mm, and the thickness of the plug gauge is set to 0.05 mm.

[0051] Further, in the reassembling step, a jacking bolt is arranged at the lower part of the intermediate bearing 20 to bear the stress after the intermediate bearing 20 falls.

[0052] As one of the embodiments, four jacking bolts are arranged at the lower part of the intermediate bearing 20.

[0053] Further, in the reassembling step, the force on the shaft supporting roller 31 is transferred to the jacking bolt. The jack 30 under the shaft supporting roller 31 is slowly lowered, and gradually falls on the jacking bolt, and the bearing dial indicator 33 on the upper part of the intermediate bearing 20 is observed at this time. The height of the jacking bolt is gradually lowered, and when the dial indicator above the shaft supporting roller 31 measures the runout amount less than or equal to 0.05 mm, it is observed whether the bearing dial indicator 33 on the intermediate bearing 20 returns to the initial value of the bearing positioning. If the error with the initial value of the bearing positioning is less than 0.05 mm, it is considered that the stress on the shaft supporting roller 31 is transferred to the intermediate bearing 20.

[0054] Further, after the resetting step, a resetting adjustment step is further included, the corresponding predetermined gap 43 of the intermediate bearing 20 after resetting is checked, the bottom gap is checked by a plug gauge with a thickness equal to the maximum value of the predetermined gap 43, the plug gauge is inserted into the predetermined gap 43, and the reassembling is completed when the plug gauge cannot be inserted into the predetermined gap 43, the sum of the left gap and the right gap is the total gap, and the left gap or the right gap is 40%-60% of the total gap. The gap between the intermediate bearing 20 and the intermediate shaft 10 at this time is checked, the bottom gap is checked by a plug gauge with a thickness of 0.05, and the plug gauge should not be inserted, the left and right gaps should be 40%-60% of the total gap, and the sum of the left and right gaps, which is to ensure that both ends are balanced and not too small on one side.

[0055] Further, the reset adjustment step further comprises a fixing step, the intermediate bearing 20 is fixed by the connecting member after reset, and the temporary shaft supporting roller 31 is removed.

[0056] Further, in the stress transfer removing step, the adjusting pad 41 is knocked loose and removed, so as to remove the intermediate bearing 20.

[0057] After the fixing step, the adjusting pad 41 is reinstalled. The upper and lower planes of the adjusting pad 41 should be ground, and the contact points in each 25*25mm should be checked by using the color method, in which the blue oil is used for matching, so as to detect the contact area between the adjusting pad 41 and the upper equipment base and the lower equipment base 40, so as to ensure that the stress is not too large due to the local contact, the gap between the adjusting pad 41 and the fixed pad 42 and the equipment base 40 is checked by using the 0.05mm plug gauge, the local insertion is allowed, and the depth is not greater than 10mm; if the 0.1mm plug gauge is used, the insertion should not be performed. After the intermediate bearing 20 is reinstalled, the subsequent installation work is performed.

[0058] In summary, the embodiment of the present application provides a method for dismounting and quickly resetting the marine intermediate bearing 20, the shaft supporting roller 31 is connected to the lifting end of the jack 30, which is used for supporting the intermediate shaft 10 during the dismounting and mounting of the intermediate bearing 20, and the stress of the intermediate shaft 10 is transferred. The initial position of the intermediate shaft 10 is calibrated by the shaft positioning dial gauge 32, the stress transfer of the intermediate shaft 10 is determined by the bearing dial gauge 33, and the position change of the intermediate bearing 20 is detected. The reset method of the present application is simple and fast, the process is controllable, the intermediate bearing 20 can be quickly reset, the on-site construction personnel can be conveniently operated, and a large amount of construction time can be saved.

[0059] The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should be regarded as the protection scope of the present application.

Claims

1. A method for disassembling, assembling, and quickly resetting a marine intermediate bearing, characterized in that: The intermediate bearing is quickly disassembled and assembled using a disassembly and assembly assembly, which includes a jack, a bearing support roller, a bearing dial indicator placed at the intermediate bearing, and a shaft positioning dial indicator placed at the intermediate shaft. The bearing support roller is connected to the lifting end of the jack. A predetermined maximum clearance is maintained between the outer peripheral wall of the intermediate shaft and the inner peripheral wall of the intermediate bearing. The assembly includes the following steps: The intermediate shaft is initially positioned by supporting the intermediate shaft at the position corresponding to the intermediate bearing to be removed using the support rollers. The rollers on both sides of the support rollers need to be in contact with the intermediate shaft. The shaft positioning dial indicator is placed on the left and right sides of the intermediate shaft, and the value of the shaft positioning dial indicator is recorded as the initial value of the shaft positioning to mark the initial position of the intermediate shaft. The position of the shaft positioning dial indicator remains unchanged during the disassembly and assembly process. For the initial bearing position calibration, bearing dial indicators are placed on both sides of the upper end of the intermediate bearing along the axial direction, and the initial bearing positioning values ​​of the bearing dial indicators are recorded. The assembly position of the intermediate bearing is marked on the base. On the base of the intermediate bearing to be disassembled, the front and rear positions of the intermediate bearing on the base are marked. This is to make a mark on the base so that it can be installed in the same position when reinstalled. Generally, just a line is drawn. In the force transfer and dismantling step, the jack lifts the intermediate shaft via the support rollers. When the readings of the bearing dial indicators on both sides are greater than or equal to the predetermined maximum clearance, the lifting end of the jack stops rising. The bearing dial indicator whose reading jumps first is the marked dial indicator, and the recorded value of the marked dial indicator is the reset value, thus dismantling the intermediate bearing. The upper bearing dial indicator is used to measure the force on the intermediate bearing. The upper dial indicator rests on the intermediate bearing. As the force is gradually transferred to the support rollers, the intermediate shaft gradually moves away from the intermediate bearing. The upper bearing dial indicator gradually starts to show a measurement value from zero. When one end of the intermediate bearing begins to rise, the upper bearing dial indicator at that end shows a reading. The lifting continues until the bearing dial indicator at the other end also shows a measurement value, indicating that the intermediate shaft has now detached from the intermediate bearing, and the force on the intermediate bearing has been completely transferred to the support rollers. The bearing reassembly step involves moving the disassembled intermediate bearing to the marked assembly position, performing preliminary assembly of the intermediate shaft and the intermediate bearing, and adjusting the marked dial indicator value to the restored value. The reset step involves using a jack to simultaneously lower and reset the intermediate shaft and the intermediate bearing. When the value of the shaft positioning dial indicator returns to the initial value of the shaft positioning, the bearing dial indicator returns from the reset value to the initial value of the bearing positioning. The intermediate bearing is then assembled and fixed, completing the reset process.

2. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 1, characterized in that: Before the initial position calibration step of the intermediate shaft, a pre-inspection step is also included, in which a feeler gauge with a thickness equal to the maximum value of the predetermined gap is inserted towards the predetermined gap between the outer peripheral wall of the intermediate shaft and the inner peripheral wall of the intermediate bearing, and the feeler gauge is inserted until it cannot be inserted into the predetermined gap.

3. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 1, characterized in that: During the force transfer and dismantling step, when the value of the dial indicator is greater than or equal to the maximum value of the predetermined gap, the lifting speed of the jack is reduced and the lifting continues.

4. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 1, characterized in that: In the bearing reinstallation step, the lower half of the intermediate bearing is moved below the intermediate shaft and then to the journal position.

5. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 1, characterized in that: In the reassembly step, the predetermined clearances of the upper, left, and right sides of the other intermediate bearings on the coaxial axis are checked again. A feeler gauge with a thickness equal to the maximum value of the predetermined clearance is inserted towards the predetermined clearance, and the test is performed until the feeler gauge cannot be inserted into the predetermined clearance.

6. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 1, characterized in that: During the reassembly step, lifting bolts are arranged at the lower part of the intermediate bearing.

7. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 6, characterized in that: During the reset step, the force on the support roller is transferred to the lifting bolt.

8. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 1, characterized in that: The reset step also includes a reset adjustment step, which checks the corresponding predetermined clearance of the intermediate bearing after reset. The bottom clearance is checked by using a feeler gauge with a thickness equal to the maximum value of the predetermined clearance. The feeler gauge is then inserted toward the predetermined clearance until it cannot be inserted into the predetermined clearance. The sum of the left clearance and the right clearance is the total clearance. The left clearance or the right clearance is 40%-60% of the total clearance.

9. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 8, characterized in that: After the reset and adjustment step, a fixing step is also included, in which the reset intermediate bearing is fixed by a connector and the support roller is removed.

10. The method for disassembling, assembling, and quickly resetting a marine intermediate bearing according to claim 9, characterized in that: In the force transfer and removal step, the adjusting shim is loosened and removed to facilitate the removal of the intermediate bearing; After the fixing step, reinstall the adjustment pad.

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