A method for installing a hydraulic coupling of a marine shafting

Abstract

This invention discloses an installation method for a hydraulic coupling in a marine shafting system. The method involves first fitting the hydraulic coupling onto the first shaft, then aligning the first and second shafts, subsequently adjusting the positions of the inner and outer sleeves of the hydraulic coupling, and finally installing the hydraulic coupling accessories. This invention enables rapid installation of the hydraulic coupling, improving installation efficiency and reducing damage to the inner surface of the inner sleeve and the outer surface of the shaft system during the inner sleeve positioning process. Furthermore, it ensures that the length of the connection between the two shaft segments is as consistent as possible after the hydraulic coupling is rotated, resulting in more balanced torque transmission.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a method for installing hydraulic couplings for ship shafting. Background Technology

[0002] The ship's shafting system is a crucial component of its propulsion system. Its function is to connect the main engine and the propeller, transmitting power from the main engine to the propeller and vice versa, thus propelling the ship. A hydraulic coupling is a detachable coupling that uses hydraulic pressure to create relative displacement between two inner and outer sleeves with tapered contact surfaces. Once the hydraulic pressure is removed, the inner sleeve elastically deforms to clamp the two connecting shafts together.

[0003] Traditional hydraulic coupling installation methods often result in roughening of the inner surface of the inner sleeve and the outer surface of the shaft during the positioning of the inner sleeve. Furthermore, the relative position of the inner sleeve and the two shafts is not checked during the installation process. If a gap occurs between the two parts during the installation of the hydraulic coupling, it can have serious consequences and may even lead to damage to the hydraulic coupling components. Summary of the Invention

[0004] In view of this, the present invention provides an installation method for a hydraulic coupling in a ship shafting system to solve the problems existing in the background art.

[0005] A method for installing a hydraulic coupling in a ship shafting system specifically includes the following steps:

[0006] S1, the hydraulic coupling is fitted onto the first shaft and the shaft end of the first shaft extends out from the hydraulic coupling;

[0007] S2, Align the second axis with the first axis, Draw multiple positioning lines on the first and second axes respectively, and project each positioning line onto the adjacent bulkhead to obtain its corresponding first inspection line;

[0008] S3, determine the outer sleeve installation displacement S of the hydraulic coupling. max According to the displacement S of the outer casing installation max The inner and outer sleeve dimensions of the hydraulic coupling are determined by marking the inner sleeve positioning line l1 on the second shaft, and a second inspection line is marked on the side of the inner sleeve positioning line away from the large end face of the inner sleeve.

[0009] S4, slowly move the hydraulic coupling until its inner sleeve large end face coincides with the inner sleeve positioning line l1;

[0010] S5 connects the oil inlet of the hydraulic coupling to the oil pump;

[0011] S6, based on the displacement S of the outer sleeve of the hydraulic coupling. maxSlowly move the outer sleeve of the hydraulic coupling until it is in place;

[0012] S7, Install hydraulic coupling accessories.

[0013] Preferably, in S3, the displacement S of the outer sleeve of the hydraulic coupling is determined. max The specific steps are as follows:

[0014] Measure the inner diameter of the inner sleeve of the hydraulic coupling and the outer diameter of the first shaft;

[0015] The actual installation clearance of the inner sleeve is calculated based on the inner diameter of the hydraulic coupling and the outer diameter of the first shaft. The actual installation clearance of the inner sleeve is equal to the difference between the inner diameter of the inner sleeve and the outer diameter of the first shaft.

[0016] According to the installation displacement and installation clearance comparison table provided by the hydraulic coupling manufacturer, the installation displacement corresponding to the actual installation clearance of the inner sleeve is obtained from the table. This installation displacement is the installation displacement S of the outer sleeve. max .

[0017] Preferably, the specific steps for marking the inner sleeve positioning line l1 of the hydraulic coupling on the second shaft in S3 are as follows:

[0018] Based on the displacement S of the outer casing installation max Calculate the distance L between the inner sleeve positioning line and the center line of the two shafts based on the inner and outer sleeve dimensions of the hydraulic coupling;

[0019] Based on the distance L between the inner sleeve positioning line and the center line of the two shafts, the inner sleeve positioning line l1 of the hydraulic coupling is drawn on the second shaft, with the center line of the two shafts as the starting point.

[0020] Preferably, the distance L between the inner sleeve positioning line of the hydraulic coupling and the center line of the two shafts is L = L1 + (S0 - S1) / (S1 + S2 ... max ), where L1 is half the contact length between the inner and outer sleeves of the hydraulic coupling; S0 is the zero-position line, which is the theoretical initial distance between the large end face of the inner sleeve and the corresponding side end face of the outer sleeve when the hydraulic coupling leaves the factory; S max Install displacement for the outer casing.

[0021] Preferably, the oil inlet of the hydraulic coupling includes a radial oil inlet and an axial oil inlet.

[0022] S6 is based on the displacement S of the outer sleeve of the hydraulic coupling. max The specific steps for slowly moving the outer sleeve of the hydraulic coupling are as follows:

[0023] Measure the actual initial distance between the inner sleeve large end face and the corresponding side end face of the outer sleeve of the hydraulic coupling, and determine whether this distance is equal to the theoretical initial distance S0. If they are not equal, pump oil into the axial oil inlet to make the outer sleeve move slowly under the action of oil pressure until the distance between the inner sleeve large end face and the corresponding side end face of the outer sleeve is equal to the theoretical initial distance S0.

[0024] Then, pump oil into the radial inlet. When oil seeps out from all sides of the inner and outer contact surfaces of the non-piston end of the hydraulic coupling, simultaneously pump oil into both the axial and radial inlets to allow the outer sleeve to continue moving slowly. When the outer sleeve moves, the displacement S of the outer sleeve installation... max Stop pumping oil when necessary.

[0025] Preferably, when pumping oil into both the axial and radial oil inlets simultaneously to allow the outer sleeve to continue moving slowly, the distance A between the end face of the outer sleeve and the large end face of the inner sleeve is measured to determine whether the outer sleeve has moved into position. When the distance A between the end face of the outer sleeve and the large end face of the inner sleeve is A = S0 - S... max When the outer casing is in place, stop pumping oil.

[0026] Preferably, a dial indicator is installed on the hydraulic coupling or the adjacent bulkhead, with the pointer of the dial indicator aligned with the outer end face.

[0027] Simultaneously pumping oil into both the axial and radial oil inlets to allow the outer sleeve to continue moving slowly, the readings of the dial indicator are used to determine whether the outer sleeve has moved into position. The outer sleeve is considered in place when the dial indicator reading equals the outer sleeve installation displacement S. max When the outer casing is in place, stop pumping oil.

[0028] Preferably, the specific steps for installing the hydraulic coupling accessory in step S7 are as follows:

[0029] Remove the oil pump and install a plug screw on the oil inlet of the hydraulic coupling;

[0030] Apply silicone to the contact area between the outer sleeve of the hydraulic coupling and the piston, then install the protective cover and put on a rubber protective sleeve.

[0031] The beneficial effects of this invention are:

[0032] 1. This invention enables the hydraulic coupling to be installed quickly, which not only improves its installation efficiency, but also reduces damage to the inner surface of the inner sleeve and the outer surface of the shaft system during the positioning process. It also ensures that the length of the connection part of the two shaft sections is as consistent as possible after the hydraulic coupling is rotated, so that the torque transmission is more balanced.

[0033] 2. By drawing multiple positioning lines on the two shaft sections and projecting each positioning line onto the adjacent bulkhead to obtain their respective first inspection lines, and drawing a second inspection line on the second shaft, the position of the two shaft sections and the inner sleeve can be monitored throughout the installation process of the hydraulic coupling to ensure the reliability of the installation. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram showing the movement of the inner sleeve into place during the pressing process of the outer and inner sleeves of the hydraulic coupling of the present invention.

[0036] Figure 2 This is a schematic diagram of the pressing process of the outer and inner sleeves of the hydraulic coupling of the present invention.

[0037] Figure 3 This is a schematic diagram of the outer and inner sleeves of the hydraulic coupling of the present invention after being press-fitted.

[0038] The meanings of the labels in the diagram are as follows:

[0039] 1. Inner sleeve; 2. Outer sleeve; 3. Piston; 4. Axial oil inlet; 5. Radial oil inlet; 6. First shaft; 7. Second shaft; 8. Inner sleeve positioning line; 9. Second inspection line. Detailed Implementation

[0040] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] The present application will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0043] This invention provides a method for installing a hydraulic coupling in a ship shafting system, specifically including the following steps:

[0044] S1, the hydraulic coupling is fitted onto the first shaft 6 and the shaft end of the first shaft 6 extends out from the hydraulic coupling.

[0045] Before fitting the hydraulic coupling onto the first shaft 6, the shaft section should be cleaned, rust removed, and dried. Then, apply clean lubricating oil with a viscosity of <20 cst. Remove the accessories of the hydraulic coupling, such as the protective layer and pressure ring sleeve. Then, clean the surfaces of the inner sleeve 1 and outer sleeve 2 of the coupling.

[0046] After completing the above preparations, place the hydraulic coupling onto the first shaft 6 from the small end face of the inner sleeve 1, ensuring that the end of the first shaft 6 extends out of the hydraulic coupling. Insertion should be done slowly. If a sudden increase in resistance occurs, immediately stop and check and adjust the tension of the straps. Only continue inserting after the cause has been eliminated. Do not force it, as this may damage the outer surface of the shaft and the inner surface of the inner sleeve.

[0047] First, attach the inseparable accessories, such as protective covers and rubber protective sleeves, onto the first shaft.

[0048] S2, Align the second axis 7 with the first axis 6, Draw multiple positioning lines on the first axis 6 and the second axis 7 respectively, and project each positioning line onto the adjacent bulkhead to obtain its corresponding first inspection line (not shown in the figure).

[0049] Positioning lines are set on the two shaft segments, and the first inspection line of its orthographic projection is drawn on the adjacent side bulkhead. This can be used to monitor whether the position of the two shaft segments is offset axially during the installation of the inner sleeve 1 and outer sleeve 2 of the hydraulic coupling.

[0050] S3, determine the outer sleeve installation displacement S of the hydraulic coupling. max According to the displacement S of the outer casing installation max The inner and outer sleeve dimensions of the hydraulic coupling are marked on the second shaft 7. The inner sleeve positioning line l1 of the hydraulic coupling is drawn, and a second inspection line 9 is drawn on the side of the inner sleeve positioning line 8 away from the large end face of the inner sleeve.

[0051] Specifically, first, the inner diameter of the inner sleeve 1 of the hydraulic coupling and the outer diameter of the first shaft 6 are measured;

[0052] The actual installation clearance of the inner sleeve is calculated based on the inner diameter of the inner sleeve 1 and the outer diameter of the first shaft 6 of the hydraulic coupling. The actual installation clearance of the inner sleeve is equal to the difference between the inner diameter of the inner sleeve 1 and the outer diameter of the first shaft 6.

[0053] According to the installation displacement and installation clearance comparison table provided by the hydraulic coupling manufacturer, the installation displacement corresponding to the actual installation clearance of the inner sleeve is obtained from the table. This installation displacement is the installation displacement S of the outer sleeve. max ;

[0054] Based on the displacement S of the outer casing installation max Calculate the distance L between the inner sleeve positioning line and the center line of the two shafts based on the inner and outer sleeve dimensions of the hydraulic coupling;

[0055] The distance L between the inner sleeve positioning line of the hydraulic coupling and the center line of the two shafts is L = L1 + (S0 - S1) / (S1 + S2 ... max ), where L1 is half the contact length between the inner sleeve 1 and the outer sleeve 2 of the hydraulic coupling, a value provided by the hydraulic coupling manufacturer; S0 is the zero-position line, i.e., the theoretical initial distance between the large end face of the inner sleeve 1 and the corresponding side end face of the outer sleeve 2 when the hydraulic coupling leaves the factory, a value provided by the hydraulic coupling manufacturer; S max Install displacement for the outer casing;

[0056] Then, based on the distance L between the inner sleeve positioning line and the center line of the two shafts, taking the center line of the two shafts as the starting point, the inner sleeve positioning line l1 of the hydraulic coupling is marked on the second shaft 7, and a second inspection line 9 is marked on the side of the inner sleeve positioning line away from the large end face of the inner sleeve 1. In this embodiment, the distance between the second inspection line 9 and the inner sleeve positioning line 8 is 50mm.

[0057] S4, slowly move the hydraulic coupling until the large end face of its inner sleeve 1 coincides with the positioning line l1 of the inner sleeve, with an accuracy error not exceeding ±0.5mm. Figure 1 As shown.

[0058] When the inner sleeve of the hydraulic coupling passes through the connection between two shaft sections, special care should be taken. If a sudden increase in resistance occurs, stop immediately to check and adjust the tension of the straps. Movement can only continue after the cause has been eliminated. Do not pull forcibly to prevent damage to the outer surface of the shaft and the inner surface of the inner sleeve.

[0059] After the hydraulic coupling is moved into place, the positioning lines marked on the two shaft sections and their corresponding first inspection lines should be used to check whether the two shafts have been displaced. That is, check whether the positioning lines on the first shaft 6 and the second shaft 7 can be aligned with their respective first inspection lines. If they can be aligned, the two shaft sections have not been displaced axially. If displacement has occurred, the hydraulic coupling should be retracted, and the subsequent steps should be continued after the fault has been checked and troubleshooted.

[0060] After the hydraulic coupling is moved into position, its positional accuracy is judged based on the distance between the large end face of its inner sleeve 1 and the second inspection line 9 at the current position.

[0061] S5 connects the oil inlet of the hydraulic coupling to the oil pump.

[0062] The hydraulic coupling has two to three radial inlet holes 5 and one axial inlet hole 4. Each radial inlet hole 5 requires an oil pump to be connected to it. The axial inlet hole 4 only requires one oil pump to be connected to it.

[0063] Before connecting the oil pump to the oil inlet of the hydraulic coupling, unscrew the plug inside the oil inlet, then connect the oil pump pipe connector and tighten it completely.

[0064] S6, based on the displacement S of the outer sleeve of the hydraulic coupling. max Slowly move the outer sleeve 2 of the hydraulic coupling until it is in place.

[0065] Specifically, first, measure the actual initial distance between the large end face of the inner sleeve 1 and the corresponding side end face of the outer sleeve 2 of the hydraulic coupling, and determine whether this distance is equal to the theoretical initial distance S0. If they are not equal, pump oil into the axial oil inlet 4 to slowly move the outer sleeve 2 under oil pressure until the distance between the large end face of the inner sleeve 1 and the corresponding side end face of the outer sleeve 2 equals the theoretical initial distance S0. Figure 2 As shown;

[0066] Then, pump oil into the radial oil inlet 5. When oil seeps out from all sides of the inner and outer contact surfaces of the non-piston end of the hydraulic coupling, simultaneously pump oil into the axial oil inlet 4 and the radial oil inlet 5 to make the outer sleeve 2 continue to move slowly. When the outer sleeve 2 moves, the displacement S of the outer sleeve installation... max Stop pumping oil when necessary, such as Figure 3 As shown.

[0067] Simultaneously, oil is pumped into the axial oil inlet 4 and the radial oil inlet 5, causing the outer sleeve 2 to move by the displacement S of the outer sleeve installation. max There are several methods.

[0068] As one embodiment, when oil is pumped into both the axial oil inlet 4 and the radial oil inlet 5 to make the outer sleeve 2 continue to move slowly, the distance A between the end face of the outer sleeve 2 and the large end face of the inner sleeve 1 is measured to determine whether the outer sleeve has moved into place. When the distance A between the end face of the outer sleeve 2 and the large end face of the inner sleeve 1 is A = S0 - S max When this occurs, it indicates that the outer jacket 2 has moved by the outer jacket installation displacement S. max Move the outer sleeve 2 into position. The allowable error range for value A is ±0.3mm. After the outer sleeve 2 is in position, simultaneously stop pumping oil into the radial oil inlet 5 and the axial oil inlet 4. Install a dial indicator on the shaft or adjacent side bulkhead of the hydraulic coupling, and align the pointer of the dial indicator with the end face of the outer sleeve 2. Then, release the radial oil pressure, maintain the pressure for 20 minutes, and then release the axial oil pressure to prevent the outer sleeve 2 from retracting. During this process, observe the change in the dial indicator reading to determine whether the position of the outer sleeve 2 has changed.

[0069] In another embodiment, a dial indicator is installed on the hydraulic coupling or adjacent bulkhead, with the pointer of the dial indicator aligned with the end face of the outer sleeve 2. Specifically, the dial indicator bracket is mounted on the hydraulic coupling or adjacent bulkhead, and the pointer of the dial indicator is positioned against the end face of the outer sleeve 2. Simultaneously, oil is pumped into the axial oil inlet 4 and the radial oil inlet 5, causing the outer sleeve 2 to continue moving slowly. The reading on the dial indicator is observed to determine whether the outer sleeve 2 has moved into position. When the dial indicator reading equals the displacement S of the outer sleeve installation...max When the outer sleeve 2 is in place, stop pumping oil into the radial oil inlet 5 and the axial oil inlet 4. Then, first release the radial oil pressure, maintain the pressure for 20 minutes, and then release the axial oil pressure to prevent the outer sleeve from retracting. During this process, observe the change in the dial gauge reading to determine whether the position of the outer sleeve has changed.

[0070] S7, Install hydraulic coupling accessories.

[0071] Specifically, remove the oil pump and install a plug on the oil inlet of the hydraulic coupling; then apply silicone to the contact area between the outer sleeve of the hydraulic coupling and the piston, install the protective cover, and put on a rubber protective sleeve.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for installing a hydraulic coupling for a ship's shafting system, characterized in that, Specifically, the following steps are included: S1, the hydraulic coupling is fitted onto the first shaft and the shaft end of the first shaft extends out from the hydraulic coupling; S2, Align the second axis with the first axis, Draw multiple positioning lines on the first and second axes respectively, and project each positioning line onto the adjacent bulkhead to obtain its corresponding first inspection line; S3, determine the outer sleeve installation displacement S of the hydraulic coupling. max According to the displacement S of the outer casing installation max The inner and outer sleeve dimensions of the hydraulic coupling are marked on the second shaft. The inner sleeve positioning line of the hydraulic coupling is drawn, and a second inspection line is drawn on the side of the inner sleeve positioning line away from the large end face of the inner sleeve. The specific steps for marking the inner sleeve positioning line of the hydraulic coupling on the second shaft are as follows: Based on the displacement S of the outer casing installation max Calculate the distance L between the inner sleeve positioning line and the center line of the two shafts based on the inner and outer sleeve dimensions of the hydraulic coupling; Based on the distance L between the inner sleeve positioning line and the center line of the two shafts, the inner sleeve positioning line of the hydraulic coupling is drawn on the second shaft, with the center line of the two shafts as the starting point. The distance L between the inner sleeve positioning line of the hydraulic coupling and the center line of the two shafts is L = L1 + (S0 - S...) max ), where L1 is half the contact length between the inner and outer sleeves of the hydraulic coupling; S0 is the zero-position line, which is the theoretical initial distance between the large end face of the inner sleeve and the corresponding side end face of the outer sleeve when the hydraulic coupling leaves the factory; S max Install displacement for the outer casing; S4. Slowly move the hydraulic coupling until the large end face of its inner sleeve coincides with the positioning line of the inner sleeve. S5 connects the oil inlet of the hydraulic coupling to the oil pump; S6, based on the displacement S of the outer sleeve of the hydraulic coupling. max Slowly move the outer sleeve of the hydraulic coupling until it is in place; S7, Install hydraulic coupling accessories.

2. The installation method of the hydraulic coupling for ship shafting according to claim 1, characterized in that, S3 determines the outer sleeve installation displacement S of the hydraulic coupling. max The specific steps are as follows: Measure the inner diameter of the inner sleeve of the hydraulic coupling and the outer diameter of the first shaft; The actual installation clearance of the inner sleeve is calculated based on the inner diameter of the hydraulic coupling and the outer diameter of the first shaft. The actual installation clearance of the inner sleeve is equal to the difference between the inner diameter of the inner sleeve and the outer diameter of the first shaft. According to the installation displacement and installation clearance comparison table provided by the hydraulic coupling manufacturer, the installation displacement corresponding to the actual installation clearance of the inner sleeve is obtained from the table. This installation displacement is the installation displacement S of the outer sleeve. max .

3. The installation method of the hydraulic coupling for ship shafting according to claim 1, characterized in that, The oil inlet of a hydraulic coupling includes a radial oil inlet and an axial oil inlet. S6 is based on the displacement S of the outer sleeve of the hydraulic coupling. max The specific steps for slowly moving the outer sleeve of the hydraulic coupling are as follows: Measure the actual initial distance between the inner sleeve large end face and the corresponding side end face of the outer sleeve of the hydraulic coupling, and determine whether this distance is equal to the theoretical initial distance S0. If they are not equal, pump oil into the axial oil inlet to make the outer sleeve move slowly under the action of oil pressure until the distance between the inner sleeve large end face and the corresponding side end face of the outer sleeve is equal to the theoretical initial distance S0. Then, pump oil into the radial inlet. When oil seeps out from all sides of the inner and outer contact surfaces of the non-piston end of the hydraulic coupling, simultaneously pump oil into both the axial and radial inlets to allow the outer sleeve to continue moving slowly. When the outer sleeve moves, the displacement S of the outer sleeve installation... max Stop pumping oil when necessary.

4. The installation method of the hydraulic coupling for ship shafting according to claim 3, characterized in that, Simultaneously pumping oil into both the axial and radial oil inlets to allow the outer sleeve to continue moving slowly, the distance A between the outer sleeve end face and the inner sleeve large end face is measured to determine whether the outer sleeve has moved into position. When the distance A between the outer sleeve end face and the inner sleeve large end face is equal to S0 - S... max When the outer casing is in place, stop pumping oil.

5. The installation method of the hydraulic coupling for ship shafting according to claim 3, characterized in that, Install a dial indicator on the hydraulic coupling or adjacent bulkhead, and align the pointer of the dial indicator with the outer casing end face. Simultaneously pumping oil into both the axial and radial oil inlets to allow the outer sleeve to continue moving slowly, the readings of the dial indicator are used to determine whether the outer sleeve has moved into position. The outer sleeve is considered in place when the dial indicator reading equals the outer sleeve installation displacement S. max When the outer casing is in place, stop pumping oil.

6. The installation method of the hydraulic coupling for ship shafting according to claim 1, characterized in that, The specific steps for installing the hydraulic coupling accessories in step S7 are as follows: Remove the oil pump and install a plug screw on the oil inlet of the hydraulic coupling; Apply silicone to the contact area between the outer sleeve of the hydraulic coupling and the piston, then install the protective cover and put on a rubber protective sleeve.

Images