A disassembling tool and method for separating a cooling water jacket from a cylinder liner of a marine engine

Abstract

The present invention discloses a disassembling tool and a disassembling method for the cooling water jacket and the cylinder liner of a marine engine. The disassembling tool includes a sleeve body, a side offset connecting plate, a protruding support end and a reinforcing rib plate; the disassembling method includes lifting and moving the cylinder head, installing the disassembling tool and separating the water jacket. By means of this disassembling tool and method, when maintaining the sealing rings of the cooling water jacket and the cylinder liner of a marine diesel engine, the cooling water jacket and the cylinder liner can be separated quickly and safely, reducing the workload and improving the efficiency, thereby reducing the time cost and safety risks of maintenance.

Description

Technical Field

[0001] The present invention relates to the technology of assembling and repairing large engines, and particularly to a disassembling tool and method for the cooling water jacket and cylinder liner of a marine engine. Background Art

[0002] When a marine diesel engine is working, diesel burns in the sealed combustion chamber formed by the cylinder head, piston, exhaust valve and cylinder liner. The expanding combustion gas pushes the piston to move up and down, and the piston and connecting rod then drive the crankshaft to rotate, realizing the conversion of internal energy and mechanical energy.

[0003] The diesel burning in the combustion chamber will generate high-temperature and high-pressure gas. Therefore, the above-mentioned components such as the cylinder liner, cylinder head and piston will be in a high-temperature state when the diesel engine is working. Usually, the exhaust temperature after combustion is about 300°C. To ensure the stable operation of the diesel engine and the service life of the cylinder liner, it is necessary to cool the cylinder liner to reduce its temperature. Generally, on a diesel engine, a cooling water jacket is added outside the cylinder liner. The cooling water jacket and the cylinder liner form a cooling water cavity, and then the flowing cooling water circulates through the water cavity to reduce the temperature of the cylinder liner when the diesel engine is working. The temperature of the cooling water after passing through the cooling water cavity formed by the cylinder liner and the cooling water jacket is about 85°C, which greatly reduces the temperature.

[0004] Both the water jacket and the cylinder liner are metal processed parts. The water cavity formed after installation is sealed by a rubber sealing ring to prevent cooling water leakage. The sealing ring needs to be replaced regularly to ensure the sealing performance. At the same time, the surfaces of the water jacket and the water cavity of the cylinder liner are cleaned, etc. The maintenance interval for replacing the sealing ring is usually 12000 hours. According to the design of the MC-C diesel engine, when replacing the sealing ring, it is necessary to separate the water jacket and the cylinder liner. However, due to long-term operation, the sealing surface will rust, and the cylinder liner and the water jacket will stick together, resulting in the cylinder liner being pulled out together when the water jacket is pulled out and they cannot be easily separated. If forced lifting is carried out, it may cause damage to the water jacket or affect the lifting safety. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a disassembling tool and method for the cooling water jacket and cylinder liner of a marine engine, which can solve the above problems.

[0006] The purpose of the present invention is achieved by adopting the following technical solutions:

[0007] A disassembling tool for the cooling water jacket and cylinder liner of a marine engine. The disassembling tool includes a sleeve body, a side offset plate, a protruding support end, and a reinforcing rib plate. The side offset plate extends radially from one end adjacent to the sleeve body. The protruding support end is perpendicular to the side offset plate and is arranged away from the sleeve body. The reinforcing rib plate is axially arranged on the outer peripheral surface of the sleeve body, and one end of the reinforcing rib plate is perpendicularly connected to the side surface of the side offset plate opposite to the protruding support end.

[0008] Preferably, the sleeve body is matched with the cylinder head bolt and nut assembly. The inner diameter of the sleeve body is larger than the outer diameter of the bolt of the cylinder head bolt and nut assembly, and the outer diameter of the sleeve body is smaller than the outer diameter of the nut of the cylinder head bolt and nut assembly.

[0009] Preferably, the side offset distance of the side offset plate is larger than the spacing distance between the cylinder head bolt and nut assembly and the cylinder liner.

[0010] Preferably, the protruding support end is integrally formed including but not limited to a plate body, a cylinder, and a cylindrical body. In the top view projection of the tool, the radial projection dimension of the protruding support end is larger than one-third of the radial projection dimension of the sleeve body; the radial projection dimension of the protruding support end is equal to the radial projection dimension of the side offset plate.

[0011] Preferably, the reinforcing rib plate is a right-angled triangular rib plate, and the included angle α between the hypotenuse of the reinforcing rib plate and the side offset plate; the thickness of the reinforcing rib plate is less than or equal to the thickness of the side offset plate.

[0012] A method for disassembling the cooling water jacket and cylinder liner using the above-mentioned disassembling tool, which includes the following steps.

[0013] ① Lift and move the cylinder head, loosen and remove the cylinder head nut of the cylinder head bolt and nut assembly, and use the lifting screw on the top of the cylinder head to lift the cylinder head and move it to the empty position on the workbench.

[0014] ② Install the disassembling tool. Install the disassembling tool on the cylinder head bolts of the cylinder head bolt and nut assembly at the four corner positions of the cylinder, and make the bottom of the protruding support end of the disassembling tool abut against the cylinder gasket on the cylinder liner, and then install the cylinder head nut on the cylinder head bolt.

[0015] ③ Separate the water jacket. Vertically pull up the cooling water jacket through the water jacket lifting tool. The cylinder liner is pressed by the four disassembling tools and will not move. The cooling water jacket is lifted up, so as to be separated from the cylinder liner, and the separation of the cylinder liner and the cooling water jacket is completed.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Through this disassembling tool and method, when maintaining and servicing the cooling water jacket and cylinder liner seal ring of a marine diesel engine, the cooling water jacket can be quickly and safely separated from the cylinder liner, reducing the workload and improving the efficiency, and further reducing the time cost and safety of maintenance and servicing. Brief Description of the Drawings

[0017] Figure 1 Front view of the disassembly tool;

[0018] Figure 2 Top view of the disassembly tool;

[0019] Figure 3 Side view of the tool;

[0020] Figure 4 Top view of the arrangement of the disassembly tool mounted on the cylinder head stud of the cylinder head;

[0021] Figure 5 Schematic diagram of the disassembly tool mounted on the cylinder head stud.

[0022] In the figure:

[0023] 100, disassembly tool; 1, sleeve body; 2, side offset plate; 3, protruding support end; 4, reinforcing rib plate;

[0024] 200, cylinder head;

[0025] 300, cylinder liner;

[0026] 400, cooling water jacket;

[0027] 500, cylinder head bolt and nut assembly. Detailed Implementation Manner

[0028] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] Refer to Figures 1 - 5 , a disassembly tool for the cooling water jacket and the cylinder liner of a marine engine. The disassembly tool 100 includes a sleeve body 1, a side offset plate 2, a protruding support end 3, and a reinforcing rib plate 4.

[0030] Connection relationship: The side offset plate 2 extends radially from one end adjacent to the sleeve body 1. The protruding support end 3 is perpendicular to the side offset plate 2 and is arranged away from the sleeve body 1. The reinforcing rib plate 4 is axially arranged on the outer peripheral surface of the sleeve body 1, and one end of the reinforcing rib plate 4 is perpendicularly connected to the side surface of the side offset plate 2 opposite to the protruding support end 3. Among them, the above connection relationship includes but is not limited to welded connection.

[0031] In a specific embodiment, the distance between the top of the outer periphery of the sleeve body 1 and the outer end of the protruding support end 3 on the same side is 80 mm, and the distance between the side offset connecting plate 2 and the bottom end of the sleeve body 1 is 10 mm.

[0032] Among them, the sleeve body 1 is matched with the cylinder head bolt and nut assembly 500. The inner diameter of the sleeve body 1 is larger than the outer diameter of the bolt of the cylinder head bolt and nut assembly 500, and the outer diameter of the sleeve body 1 is smaller than the outer diameter of the nut of the cylinder head bolt and nut assembly 500.

[0033] Among them, the side offset distance of the side offset connecting plate 2 is greater than the spacing distance between the cylinder head bolt and nut assembly 500 and the cylinder liner 300.

[0034] Among them, the protruding support end 3 as a whole includes but is not limited to a plate body, a cylinder, and a cylinder body. In the top view projection of the tool, the radial projection dimension of the protruding support end 3 is greater than one-third of the radial projection dimension of the sleeve body 1; the radial projection dimension of the protruding support end 3 is equal to the radial projection dimension of the side offset connecting plate 2.

[0035] Among them, the reinforcing rib plate 4 is a right-angled triangular rib plate, and the included angle α between the hypotenuse of the reinforcing rib plate 4 and the side offset connecting plate 2; the thickness of the reinforcing rib plate 4 is less than or equal to the thickness of the side offset connecting plate 2. Further, the included angle α is 120°.

[0036] A method for disassembling the cooling water jacket and the cylinder liner using the above-mentioned disassembly tool, the method includes the following steps.

[0037] ① Lift and move the cylinder head, loosen and remove the cylinder head nut of the cylinder head bolt and nut assembly 500, and use the lifting screw on the top of the cylinder head to lift the cylinder head 200 and move it to the empty space on the workbench.

[0038] ② Install the disassembly tool 100. Sleeve the disassembly tool 100 on the cylinder head bolts of the cylinder head bolt and nut assembly 500 at the four corner positions of the cylinder, and make the bottom of the protruding support end 3 of the disassembly tool 100 abut against the cylinder gasket on the cylinder liner 300, and then install the cylinder head nut on the cylinder head bolt.

[0039] Among them, when installing the disassembly tool 100, vertically sleeve the disassembly tool 100 with the protruding support end 3 at the bottom and the lower sleeve body 1 at the top onto the cylinder head bolt, and rotate and adjust the protruding support end 3 so that its lower part abuts against the cylinder liner 300.

[0040] ③Separate the water jacket. Vertically pull up the cooling water jacket 400 through the water jacket lifting tool. The cylinder liner 300 is pressed by the four disassembly tools 100 and will not move. At this time, if the cylinder liner and the cooling water jacket are adhered together due to rust, the cylinder liner 300 will be pressed by the protruding support ends 3 of the four disassembly tools 100 and will not move. The cooling water jacket 400 is lifted upward, so as to be separated from the cylinder liner 300, and the separation of the cylinder liner and the cooling water jacket is completed.

[0041] After the disassembly is completed, remove the disassembly tool 100, lift the cooling water jacket 400, and then perform operations such as cleaning the cooling water cavity surface and replacing the sealing ring to complete the maintenance.

[0042] This disassembly tool and disassembly method can be widely applied to the separation scenarios of the cylinder liner and the cooling water jacket of large diesel engines in applications such as ships.

[0043] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tool for separating the cooling water jacket and cylinder liner of a marine engine, characterized by: The disassembly tool (100) comprises a sleeve body (1), a side deflection plate (2), a protruding support end (3) and a reinforcing rib plate (4), wherein the side deflection plate (2) is radially extended from one end adjacent to the sleeve body (1), the protruding support end (3) is perpendicular to the side deflection plate (2) and is arranged away from the sleeve body (1), the reinforcing rib plate (4) is axially arranged on the outer peripheral surface of the sleeve body (1), and one end of the reinforcing rib plate (4) is vertically connected to a side surface of the side deflection plate (2) opposite to the protruding support end (3): The sleeve body (1) matches the cylinder head bolt and nut assembly (500), the inner diameter of the sleeve body (1) is larger than the outer diameter of the bolt of the cylinder head bolt and nut assembly (500), and the outer diameter of the sleeve body (1) is smaller than the outer diameter of the nut of the cylinder head bolt and nut assembly (500); The side deflection distance of the side deflection connecting plate (2) is greater than the spacing distance between the cylinder head bolt and nut assembly (500) and the cylinder sleeve (300).

2. The disassembly tool according to claim 1, characterized in that: The protruding support end (3) is in the form of a plate, a cylinder or a cylindrical body as a whole. In the top projection of the tool, the radial projection size of the protruding support end (3) is greater than one-third of the radial projection size of the sleeve body (1); the radial projection size of the protruding support end (3) is equal to the radial projection size of the side deflection plate (2).

3. The disassembly tool according to claim 1, characterized in that: The reinforcing rib plate (4) is a right-angled triangular rib plate, and the angle α between the hypotenuse of the reinforcing rib plate (4) and the side deflection plate (2) is less than or equal to the thickness of the side deflection plate (2).

4. A method for disassembling a cooling water jacket and a cylinder liner using the disassembling tool according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: ① Lift and move the cylinder head, loosen and remove the cylinder head nuts of the cylinder head bolt and nut assembly (500), and use the lifting screws on the top of the cylinder head to lift the cylinder head and move it to an empty space on the workbench; ② Install the disassembly tool (100), set the disassembly tool (100) on the cylinder head bolts of the cylinder head bolt and nut assembly (500) at the four corners of the cylinder, and make the bottom of the protruding support end (3) of the disassembly tool (100) abut against the cylinder gasket on the cylinder sleeve (300), and then install the cylinder head nut on the cylinder head bolt; ③ Separate the water jacket. Use the water jacket lifting tool to pull the cooling water jacket (400) vertically upward. The cylinder jacket (300) is pressed by the four disassembly tools (100) and will not move. The cooling water jacket (400) is lifted upward, thereby separating from the cylinder jacket (300), completing the separation of the cylinder jacket and the cooling water jacket.

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