Marine diesel engine hydraulic pushing supporting device mounting tool and method

Abstract

The invention relates to the field of hydraulic pushing and supporting device installation, in particular to a marine diesel engine hydraulic pushing and supporting device installation tool and method.The marine diesel engine hydraulic pushing and supporting device installation tool comprises a ship body, and a ship body side flange is welded to one side of the ship body; a main engine side flange hydraulic pushing supporting device is welded to one side of the main engine, and the hydraulic pushing supporting device is installed between the main engine and the ship body structure and used for preventing resonance between the ship body and the main engine. According to the mounting tool and method for the hydraulic pushing supporting device of the marine diesel engine, the length of the hydraulic pushing supporting device is determined through a hoisting tool for transportation, and the problem that the mounting length is too long or too short when the hydraulic pushing supporting device is mounted is solved; the parallelism of a main machine side flange and a hull side flange on the two sides of the hydraulic pushing supporting device is guaranteed through the flange installation tool, and it is guaranteed that the parallelism of the main machine side flange and the hull side flange of the hydraulic pushing supporting device is smaller than or equal to 1 degree, namely the allowable range is designed.

Description

Technical Field

[0001] The invention relates to the field of installation of a hydraulic jacking support device, and in particular to an installation tool and method of a hydraulic jacking support device for a marine diesel engine. Background Art

[0002] The hull (commonly known as the "shell" or "hull") is composed of a series of plates and frames (referred to as "frames"). The plates and frames are interconnected and support each other. The frame is the supporting part of the shell, which not only improves the strength and rigidity of the shell plate, but also enhances the plate's ability to resist instability. The installation of the lateral support (top support) is to reduce the impact of the main engine vibration on the ship. Its principle is to change the frequency of the vibration transmitted to the hull structure through the main engine to avoid resonance between the hull and the main engine. Its function is equivalent to installing a spring between the main engine and the hull structure. When the force generated by the vibration of the main engine is transmitted to the piston through the support rod, the hydraulic oil in the cylinder produces rapid pressure fluctuations. However, through the filtering and absorption effect of the throttle valve and the accumulator, the magnitude and frequency of the force transmitted to the hull structure through the hydraulic cylinder are reduced, thereby reducing the vibration and deformation of the hull structure. The independent main engine hydraulic top support device (hereinafter referred to as hydraulic top support) is installed between the main engine and the hull structure to prevent resonance between the hull and the main engine, thereby reducing the impact of the main engine vibration. A vibration reduction device.

[0003] The following problems exist when the original marine diesel engine hydraulic push support device is installed and used:

[0004] 1. Since the main engine is arranged in the engine room, and the hull in the engine room is not a flat surface, the installation length of the hydraulic push support device may be too long or too short during installation. If the installation length is too long, the force on the piston and piston rod will increase, resulting in the bending of the piston rod or the loosening of the piston bolt, which will lead to mechanical failure; at the same time, too large a stroke will increase the range of motion of the hydraulic cylinder, increase friction, and aggravate mechanical loss; if the installation length is too short, the radial external force on the piston rod will increase, resulting in increased mechanical wear and shortening the service life of the hydraulic cylinder.

[0005] 2. When installing the hydraulic thrust support device for marine diesel engines, if the parallelism error of more than 1° is encountered during the welding of the hull side flange and the main engine side flange, it will cause dangerous situations such as cylinder pulling of the hydraulic thrust support device, which will have an adverse effect on the work safety and accuracy.

[0006] Therefore, it is necessary to provide a new installation tool and method for a hydraulic jacking support device of a marine diesel engine to solve the above-mentioned technical problems. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a tool and method for installing a hydraulic jacking support device for a marine diesel engine.

[0008] The installation tool of the hydraulic jacking support device for a marine diesel engine provided by the present invention comprises:

[0009] A hull, one side of which is welded with a hull side flange;

[0010] The main engine has a main engine side flange welded on one side of the main engine

[0011] A hydraulic thrust support device is installed between the main engine and the hull structure to prevent resonance between the hull and the main engine, thereby reducing the impact of main engine vibration;

[0012] Transportation lifting tool, which is used to lift the hydraulic jacking support device during transportation;

[0013] Flange installation tool: The flange installation tool is used to correctly install the main engine side and hull side flanges.

[0014] Preferably, four evenly distributed first bolt holes are provided on the hull side flange, and one end of the hull side flange away from the hull is connected to the hydraulic jacking support device through bolts.

[0015] Preferably, four evenly distributed second bolt holes are provided on the main engine side flange, and one end of the main engine side flange away from the main engine is connected to the hydraulic jacking support device through bolts.

[0016] Preferably, a lifting eye screw is provided in the middle of the upper end of the transport lifting tool, and the lifting eye screw is connected to the hand winch. Three third bolt holes are provided on the transport lifting tool, and the transport lifting tool is installed on the upper and lower sides of the hydraulic jacking support device through the third bolt holes and bolts. A square protrusion is provided at the lower end of the side of the transport lifting tool connected to the main engine side flange, and the upper end of the square protrusion is fixedly connected to the transport lifting tool by welding, and a through bolt hole is provided in the middle.

[0017] Preferably, the hydraulic jacking support device is provided with fourth bolt holes adapted to the lifting tool for transportation at both upper and lower ends.

[0018] Preferably, the flange installation tool includes a main engine side sleeve and a hull side sleeve, a No. 1 flange is welded on one end of the main engine side sleeve, a No. 2 flange is welded on one end of the hull side sleeve, a fifth bolt hole is provided on the hull side sleeve, and the hull side sleeve is connected to the lifting eye screw through the fifth bolt hole.

[0019] Preferably, the present solution also includes a method for installing a hydraulic jacking support device for a marine diesel engine, using the above-mentioned installation tool for the hydraulic jacking support device for a marine diesel engine, comprising the following steps:

[0020] S1. First, use 8 matching bolts to install the main engine side flange and the hull side flange with the No. 1 flange on the main engine side sleeve and the No. 2 flange on the hull side sleeve, and adjust the main engine side sleeve and the hull side sleeve to the installation length;

[0021] S2. Then, a hand chain hoist is arranged above the hydraulic push support device to lift the main engine side sleeve and the hull side sleeve to the installation position;

[0022] S3. Secondly, measure the distance between the main engine installation point and the hull structure and the non-parallelism of the flange; if the installation length is not enough, the hull structure can be corrected to meet the installation length requirements. If the non-parallelism between the main engine side flange and the hull side flange is greater than 1°, the hull side structure needs to be trimmed. If the length becomes too long after trimming, it can be adjusted with gaskets;

[0023] S4, then spot weld the main engine side flange at the main engine installation point, while ensuring that the angle between the main engine side flange and the main engine bracket is 90° in the horizontal and vertical directions;

[0024] S5. Then spot weld the hull side flange at the hull installation location;

[0025] S6. Finally, remove the main engine side sleeve and the hull side sleeve to complete the welding work. In order to reduce deformation, keep away from heat sources as much as possible during welding.

[0026] Preferably, the method further comprises the following steps:

[0027] S1. First, fasten the transport lifting tool to the hydraulic jacking support device through the fourth bolt hole on the hydraulic jacking support device with bolts;

[0028] S2. Then install the hand chain hoist on the lifting ring of the transport lifting tool. Attention should be paid here not to use the thrust rod of the hydraulic jacking support device for lifting. Unless it is necessary to remove the hydraulic jacking support device, do not remove the transport lifting tool, otherwise the unit will fall apart.

[0029] S3. Adjust the hydraulic push support device to the correct position and install it at the hull installation point with four matching bolts. Adjust the hydraulic push support device in the horizontal direction and tighten the bolts.

[0030] S4. Install the hydraulic push support device at the main engine installation point with 4 suitable bolts, but do not tighten them;

[0031] S5. Remove the bolts on the lifting tool used for transportation near the main engine side to ensure that the hydraulic jacking support device does not fall apart;

[0032] S6. To ensure that the thrust rods of the hydraulic jacking support device are in a straight line in the horizontal and vertical directions, it may be necessary to loosen the bolts on the hull side for final correction when tightening the bolts of the main engine side mounting points, and then tighten all 8 bolts;

[0033] S7. Remove the lifting tools used for transportation to complete other related installation work.

[0034] Compared with the prior art, the installation tool and method of the hydraulic jacking support device for a marine diesel engine provided by the present invention have the following beneficial effects:

[0035] The present invention provides a hydraulic jacking support device installation tool and method for a marine diesel engine, compared with the prior art;

[0036] The length of the hydraulic jacking support device is determined by using a lifting tool for transportation, which solves the problem of the installation length of the hydraulic jacking support device being too long or too short during installation;

[0037] The flange installation tool is used to ensure the parallelism of the main engine side flange and the hull side flange on both sides of the hydraulic jacking support device, ensuring that the parallelism of the main engine side flange and the hull side flange of the hydraulic jacking support device is ≤1°, which is within the design allowable range;

[0038] It meets the rigidity requirements of the installation points of the hydraulic cylinder unit of the independent hydraulic push support device. It can more simply, quickly and accurately complete the installation of the independent hydraulic push support device of the ME type low-speed diesel engine for ship, reduce the repair work of the hull structure caused by it, and thus achieve the effect of saving manpower and material resources. It has the characteristics of simple structure, easy operation and convenient use, and is suitable for various specifications of ME type low-speed diesel engine independent hydraulic push support devices with good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic structural diagram of the installation of the hydraulic jacking support device for a marine diesel engine provided by the present invention;

[0040] Figure 2 It is a structural schematic diagram of the lifting tool for transportation of the present invention;

[0041] Figure 3 It is a schematic cross-sectional structural diagram of the lifting tool for transportation of the present invention;

[0042] Figure 4 It is a schematic diagram of the installation structure of the lifting tool for transportation of the present invention;

[0043] Figure 5 It is a structural schematic diagram of the flange installation tool of the present invention;

[0044] Figure 6 It is a schematic structural diagram of the main engine side sleeve and the hull side sleeve of the present invention.

[0045] Numbers in the figure: 1. hull; 2. hull side flange; 3. main engine; 4. main engine side flange; 5. hydraulic jacking support; 6. lifting tool for transportation; 7. flange installation tool; 61. lifting eye screw; 62. square protrusion; 63. through bolt hole; 71. main engine side sleeve; 72. hull side sleeve; 73. No. 1 flange; 74. No. 2 flange. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0048] See also Figures 1 to 6 , an embodiment of the present invention provides a marine diesel engine hydraulic jacking support device installation tool and method, the marine diesel engine hydraulic jacking support device installation tool comprises:

[0049] A hull 1, with a hull side flange 2 welded to one side of the hull 1;

[0050] The main machine 3 has a main machine side flange 4 welded to one side of the main machine 3

[0051] A hydraulic thrust support device 5 is installed between the main engine 3 and the hull 1 structure to prevent resonance between the hull 1 and the main engine 3, thereby reducing the impact of vibration of the main engine 3;

[0052] A transport lifting tool 6, which is used to lift the hydraulic jacking support device 5 during transportation;

[0053] The flange installation tool 7 is used to correctly install the flange 2 on the main engine 3 side and the hull side.

[0054] In the working state, first use the flange installation tool 7 to connect with the main engine side flange 4 and the hull side flange 2 through bolts, then use a hand winch to lift it to the installation position, and then use the transportation lifting tool 6 to lift the hydraulic jacking support device 5 to the installation position, and connect it with the main engine side flange 4 and the hull side flange 2 through bolts.

[0055] See also Figures 1 to 6 The hull side flange 2 is provided with four evenly distributed first bolt holes, and one end of the hull side flange 2 away from the hull 1 is connected to the hydraulic jacking support device 5 through bolts.

[0056] Fasten the hull side flange 2 to the flange installation tool 7 with four matching bolts, and adjust the installation tool to the installation length.

[0057] See also Figures 1 to 6 The main engine side flange 4 is provided with four evenly distributed second bolt holes, and the end of the main engine side flange 4 away from the main engine 3 is connected to the hydraulic jacking support device 5 by bolts.

[0058] Fasten the main engine side flange 4 to the flange installation tool 7 with four matching bolts, and adjust the installation tool to the installation length.

[0059] See also Figures 1 to 6 A lifting eye screw 61 is provided in the middle of the upper end of the transport lifting tool 6, and the lifting eye screw 61 is connected to the hand winch. Three third bolt holes are provided on the transport lifting tool 6. The transport lifting tool 6 is installed on the upper and lower sides of the hydraulic jacking support device 5 through the third bolt holes and bolts. A square protrusion 62 is provided at the lower end of the side where the transport lifting tool 6 is connected to the main machine side flange 4. The upper end of the square protrusion 62 is fixedly connected to the transport lifting tool 6 by welding, and a through bolt hole 63 is provided in the middle.

[0060] The hand chain hoist is installed on the eye screw 61 to facilitate the overall lifting of the hydraulic jacking support device 5. At the same time, the length of the hydraulic jacking support device 5 is determined by using the transportation lifting tool 6, which solves the problem of the installation length of the hydraulic jacking support device 5 being too long or too short during installation.

[0061] See also Figures 1 to 6 The hydraulic jacking support device 5 is provided with fourth bolt holes adapted to the transport lifting tool 6 at both upper and lower ends.

[0062] Fasten the transport lifting tool 6 to the hydraulic jacking support device 5 with three adapter bolts. Note that do not use the thrust rod of the hydraulic jacking support device 5 for lifting. Unless the hydraulic jacking support device 5 needs to be removed, do not remove the transport lifting tool 6, otherwise the unit will fall apart.

[0063] See also Figures 1 to 6 The flange installation tool 7 includes a main engine side sleeve 71 and a hull side sleeve 72. A No. 1 flange 73 is welded to one end of the main engine side sleeve 71, and a No. 2 flange 74 is welded to one end of the hull side sleeve 72. A fifth bolt hole is provided on the hull side sleeve 72, and the hull side sleeve 72 is connected to the eye screw 61 through the fifth bolt hole.

[0064] Main engine side flange 4 and hull side flange 2, fasten the main engine side flange 4 to flange No. 1 73 with bolts, fasten the hull side flange 2 to flange No. 2 74 with bolts, lift the flange installation tool 7 to the installation position with a hand winch, adjust the installation length and parallelism, spot weld the main engine side flange 4 at the main engine 3 installation point, and ensure that the angle with the bracket is 90° in the horizontal and vertical directions, and spot weld the hull side flange 2 at the hull 1 installation point.

[0065] See also Figures 1 to 6 The present invention also includes a method for installing a hydraulic jacking support device for a marine diesel engine, using the above-mentioned installation tool for the hydraulic jacking support device for a marine diesel engine, including the following steps:

[0066] S1. First, install the main engine side flange 4 and the hull side flange 2 with the No. 1 flange 73 on the main engine side sleeve 71 and the No. 2 flange 74 on the hull side sleeve 72 using 8 matching bolts, and adjust the main engine side sleeve 71 and the hull side sleeve 72 to the installation length;

[0067] S2, then arrange a hand chain hoist above the hydraulic jacking support device 5 to lift the main engine side sleeve 71 and the hull side sleeve 72 to the installation position;

[0068] S3, then measure the distance between the main engine 3 installation point and the hull 1 structure and the flange non-parallelism; if the installation length is not enough, the hull 1 structure can be corrected to meet the installation length requirement. If the non-parallelism between the main engine side flange 4 and the hull side flange 2 is greater than 1°, the hull 1 side structure needs to be trimmed. If the length becomes too long after trimming, it can be adjusted with a gasket. The flange installation tool 7 is used to ensure the parallelism of the main engine side flange 4 and the hull side flange 2 on both sides of the hydraulic jacking support device 5, ensuring that the parallelism of the main engine side flange 4 and the hull side flange 2 of the hydraulic jacking support device 5 is ≤1°, that is, the design allowable range;

[0069] S4, then spot weld the main engine side flange 4 to the main engine 3 installation point, while ensuring that the angle between the main engine side flange 4 and the main engine 3 bracket is 90° in the horizontal and vertical directions;

[0070] S5, then spot weld the hull side flange 2 to the installation position of the hull 1;

[0071] S6. Finally, remove the main engine side sleeve 71 and the hull side sleeve 72 to complete the welding work. In order to reduce deformation, the welding should be carried out as far away from the heat source as possible.

[0072] See also Figures 1 to 6 , further comprising the following steps:

[0073] S1, firstly, fasten the transport lifting tool 6 to the hydraulic jacking support device 5 with bolts according to the fourth bolt holes on the hydraulic jacking support device 5;

[0074] S2. Then install the hand chain hoist on the lifting ring of the transport lifting tool 6. It should be noted here that the thrust rod of the hydraulic jacking support device 5 should not be used for lifting. Unless the hydraulic jacking support device 5 needs to be removed, do not remove the transport lifting tool 6, otherwise the unit will fall apart.

[0075] S3, adjust the hydraulic jacking support device 5 to the correct position, and install it at the installation point of the hull 1 with 4 matching bolts, adjust the hydraulic jacking support device 5 in the horizontal direction, and tighten the bolts;

[0076] S4. Install the hydraulic push support device 5 at the mounting point of the main engine 3 with 4 matching bolts, but do not tighten them;

[0077] S5, remove the bolts on the lifting tool 6 for transportation near the main engine 3 to ensure that the hydraulic jacking support device 5 does not fall apart;

[0078] S6. To ensure that the thrust rods of the hydraulic thrust support device 5 are in a straight line in the horizontal and vertical directions, it may be necessary to loosen the bolts on the side of the hull 1 for final correction when tightening the bolts of the mounting points on the side of the main engine 3, and finally tighten all 8 bolts;

[0079] S7. Remove the transport lifting tool 6 to complete other related installation work.

[0080] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0081] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic jacking support device installation tool for a marine diesel engine, characterized in that: include: A hull (1), one side of the hull (1) being welded with a hull side flange (2); A main machine (3), one side of which is welded with a main machine side flange (4) A hydraulic thrust support device (5), which is installed between the main engine (3) and the hull (1) structure and is used to prevent resonance between the hull (1) and the main engine (3), thereby reducing the impact of vibration of the main engine (3); A transport lifting tool (6), the transport lifting tool (6) is used to lift the hydraulic jacking support device (5) during transportation; The flange installation tool (7) is used to correctly install the flange (2) on the main engine (3) side and the hull side.

2. The installation tool for the hydraulic jacking support device of a marine diesel engine according to claim 1 is characterized in that: The hull side flange (2) is provided with four evenly distributed first bolt holes, and the end of the hull side flange (2) away from the hull (1) is connected to the hydraulic jacking support device (5) through bolts.

3. The installation tool and method of the hydraulic thrust support device for a marine diesel engine according to claim 1, characterized in that: The main engine side flange (4) is provided with four evenly distributed second bolt holes, and the end of the main engine side flange (4) away from the main engine (3) is connected to the hydraulic jacking support device (5) by bolts.

4. The installation tool for the hydraulic jacking support device of a marine diesel engine according to claim 1 is characterized in that: A lifting eye screw (61) is provided in the middle of the upper end of the transport lifting tool (6), and the lifting eye screw (61) is connected to the hand winch. Three third bolt holes are provided on the transport lifting tool (6), and the transport lifting tool (6) is installed on the upper and lower sides of the hydraulic jacking support device (5) through the third bolt holes and bolts. A square protrusion (62) is provided at the lower end of the side of the transport lifting tool (6) connected to the main machine side flange (4), and the upper end of the square protrusion (62) is fixedly connected to the transport lifting tool (6) by welding, and a through bolt hole (63) is provided in the middle.

5. The installation tool for the hydraulic jacking support device of a marine diesel engine according to claim 1 is characterized in that: The hydraulic jacking support device (5) is provided with fourth bolt holes adapted to the transport lifting tool (6) at both upper and lower ends.

6. The installation tool for the hydraulic jacking support device of a marine diesel engine according to claim 1, characterized in that: The flange installation tool (7) comprises a main engine side sleeve (71) and a hull side sleeve (72), wherein a No. 1 flange (73) is welded to one end of the main engine side sleeve (71), and a No. 2 flange (74) is welded to one end of the hull side sleeve (72), and a fifth bolt hole is provided on the hull side sleeve (72), and the hull side sleeve (72) is connected to the eye screw (61) via the fifth bolt hole.

7. A method for installing a hydraulic jacking support device for a marine diesel engine, using the installation tool for the hydraulic jacking support device for a marine diesel engine as claimed in any one of claims 1 to 6, characterized in that: The steps include: S1. First, the main engine side flange (4) and the hull side flange (2) are installed with the No. 1 flange (73) on the main engine side sleeve (71) and the No. 2 flange (74) on the hull side sleeve (72) using 8 matching bolts, and the main engine side sleeve (71) and the hull side sleeve (72) are adjusted to the installation length; S2, then arrange a hand chain hoist above the hydraulic jacking support device (5) to lift the main engine side sleeve (71) and the hull side sleeve (72) to the installation position; S3. Next, measure the distance between the main engine (3) installation point and the hull (1) structure and the non-parallelism of the flanges. If the installation length is not enough, the hull (1) structure can be corrected to meet the installation length requirement. If the non-parallelism between the main engine side flange (4) and the hull side flange (2) is greater than 1°, the hull (1) side structure needs to be trimmed. If the length becomes too long after trimming, a gasket can be used to adjust it. S4, then spot weld the main engine side flange (4) to the main engine (3) installation point, while ensuring that the angle between the main engine side flange (4) and the main engine (3) bracket is 90° in the horizontal and vertical directions; S5, then spot-weld the hull side flange (2) to the hull (1) installation position; S6. Finally, remove the main engine side sleeve (71) and the hull side sleeve (72) to complete the welding work. In order to reduce deformation, the welding should be carried out away from the heat source as much as possible.

8. The method for installing a hydraulic jacking support device for a marine diesel engine according to claim 7, characterized in that: The following steps are also included: S1. First, the transport lifting tool (6) is fastened to the hydraulic jacking support device (5) by bolts according to the fourth bolt holes on the hydraulic jacking support device (5); S2. Then install the hand chain hoist onto the lifting ring of the transport lifting tool (6). Attention should be paid here not to use the thrust rod of the hydraulic jacking support device (5) for lifting. Unless it is necessary to remove the hydraulic jacking support device (5), do not remove the transport lifting tool (6), otherwise the unit will fall apart. S3. Adjust the hydraulic jacking support device (5) to the correct position and install it at the installation point of the hull (1) with four suitable bolts, adjust the hydraulic jacking support device (5) in the horizontal direction, and tighten the bolts; S4. Install the hydraulic push support device (5) at the mounting point of the main engine (3) with four suitable bolts, but do not tighten them; S5. Remove the bolts on the transport lifting tool (6) on the side close to the main engine (3) to ensure that the hydraulic jacking support device (5) does not fall apart; S6. To ensure that the thrust rods of the hydraulic thrust support device (5) are aligned in the horizontal and vertical directions, it may be necessary to loosen the bolts on the side of the hull (1) for final correction when tightening the bolts on the mounting points on the main engine (3) side, and then tighten all 8 bolts; S7. Remove the lifting tool (6) for transportation to complete other related installation work.

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