Marine engine cylinder liner reinforcing ring hot assembly system

Abstract

The utility model provides a kind of marine engine cylinder liner reinforcing ring hot assembly system.The utility model includes hoisting mechanism, mobile heating mechanism and engine cylinder liner vertical support, the mobile heating mechanism includes vehicle body and the electromagnetic heating device being arranged in vehicle body one side, and reinforcing ring is set on vehicle body, the reinforcing ring outside is sleeved with horizontal hoisting clamp, at least four lugs are arranged outside horizontal hoisting clamp, four lugs are evenly arranged on the outer wall surface of clamp, the hoisting mechanism is provided with the hook of the number of cooperation lug, the engine cylinder liner vertical support is vertically arranged on ground, the engine cylinder liner to be clamped is arranged in the inside of engine cylinder liner vertical support.The utility model solves the problem that traditional simple lifting appliance is not stable and is easy to deviate.Improve the control of lifting gravity center significantly, effectively prevent the risk of shaking, tilting or even falling caused by gravity center deviation during lifting process, greatly improve safety.

Description

Technical Field

[0001] This utility model relates to the field of marine engine manufacturing and assembly, and in particular to a marine engine cylinder liner reinforcing ring hot assembly system. Background Technology

[0002] In the manufacturing and assembly of marine engines, the hot assembly of cylinder liner reinforcing rings is a critical process. As marine power systems continue to develop towards higher power and higher reliability, higher requirements are placed on the precision and safety of the hot assembly of cylinder liner reinforcing rings.

[0003] Traditional hot-fitting of marine engine cylinder liners typically involves heating the inside of the reinforcing ring with an oxy-acetylene flame in the factory processing area. A crane then lifts the reinforcing ring, and the cylinder liner to be assembled is placed horizontally on a frame. The reinforcing ring is then manually aligned with the head of the cylinder liner for hot fitting. Most conventional lifting tools have simple structures and cannot provide a stable, all-around grip on the reinforcing ring. During lifting, the reinforcing ring is prone to displacement due to shaking and collisions, severely affecting the accuracy of subsequent hot fitting and potentially causing performance problems during engine operation, such as decreased sealing and increased vibration.

[0004] On the other hand, in actual assembly operations, due to the complex shape of marine engine cylinder liners, the operation of traditional spreaders with only one side open is often not flexible or convenient enough, and it is difficult to adapt to the high-temperature and variable assembly environment, resulting in low assembly efficiency. At the same time, traditional spreaders do not adequately consider center of gravity control in their design. When lifting the reinforcing ring, the center of gravity is prone to shift, increasing the safety risks during the lifting process, which may cause the reinforcing ring to fall and be damaged, or even endanger the safety of the operators. Utility Model Content

[0005] To address the aforementioned technical problems, a hot-fitting system for reinforcing rings of marine engine cylinder liners is provided. The technical means employed in this invention are as follows:

[0006] A hot-fitting system for a marine engine cylinder liner reinforcing ring includes a hoisting mechanism, a mobile heating mechanism, and a vertical support for the engine cylinder liner. The mobile heating mechanism includes a vehicle body and an electromagnetic heating device disposed on one side of the vehicle body, as well as a reinforcing ring disposed on the vehicle body. A horizontal hoisting clamp is sleeved on the outside of the reinforcing ring. The horizontal hoisting clamp is provided with at least four lifting lugs, which are evenly disposed on the outer wall surface of the clamp. The hoisting mechanism is provided with hooks that match the number of lifting lugs. The vertical support for the engine cylinder liner is vertically disposed on the ground, and the engine cylinder liner to be clamped is disposed inside the vertical support for the engine cylinder liner.

[0007] Furthermore, the horizontal hoisting fixture includes a fixture body, one end of which is rotatably connected by a hinge shaft, and the other end is an open end. A mounting part protruding from the fixture body is provided at the open end, and a screw hole is provided on the mounting part. The open end is fixed by a bolt passing through the screw hole.

[0008] Furthermore, at the opening end, a reinforcing rib structure is provided between the mounting part and the fixture body.

[0009] Furthermore, the engine cylinder liner vertical support is provided with several rollers inside.

[0010] This utility model has the following advantages: It achieves all-around encircling clamping of the reinforcing ring through a horizontal lifting fixture. The open design allows for flexible side insertion / removal of the reinforcing ring, adapting to the operational convenience requirements of high-temperature environments. Locking bolts ensure a secure clamping grip. It solves the problems of unstable clamping and easy displacement associated with traditional simple lifting fixtures. The four evenly distributed lifting lugs of the horizontal lifting fixture cooperate with the four hooks of the lifting mechanism to achieve balanced lifting at four points. This significantly improves the control of the lifting center of gravity, effectively preventing swaying, tilting, or even falling risks caused by center of gravity shift during lifting, greatly improving safety. The vertical support for the engine cylinder liner changes the traditional horizontal placement method. This allows the reinforcing ring to be inserted vertically downwards into the cylinder liner, with gravity naturally assisting assembly, simplifying operation and avoiding the difficulties and misalignment of horizontal assembly. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a simplified diagram of the system of this utility model.

[0013] Figure 2 This is the front view of the horizontal hoisting clamp of this utility model.

[0014] Figure 3 for Figure 2 AA sectional view.

[0015] In the diagram: 1. Lifting mechanism; 11. Hook; 2. Car body; 21. Electromagnetic heating device; 3. Reinforcing ring; 4. Horizontal lifting clamp; 41. Lifting lug; 42. Clamp body; 43. Hinge shaft; 44. Bolt; 45. Reinforcing rib; 5. Engine cylinder liner vertical bracket; 6. Engine cylinder liner; 7. Roller. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] like Figures 1-3 As shown in the figure, this utility model discloses a hot assembly system for a marine engine cylinder liner reinforcing ring, including a hoisting mechanism 1, a mobile heating mechanism, and a vertical support for the engine cylinder liner. The mobile heating mechanism includes a vehicle body 2 and an electromagnetic heating device 21 disposed on one side of the vehicle body, as well as a reinforcing ring 3 disposed on the vehicle body. A horizontal hoisting clamp 4 is sleeved on the outside of the reinforcing ring. At least four lifting lugs 41 are disposed on the outside of the horizontal hoisting clamp, and the four lifting lugs are evenly disposed on the outer wall surface of the clamp. The hoisting mechanism is provided with hooks 11 that match the number of lifting lugs. The vertical support for the engine cylinder liner 5 is vertically disposed on the ground, and the engine cylinder liner 6 to be clamped is disposed inside the vertical support for the engine cylinder liner. The lifting lugs are of the same specification and are annular lifting lugs.

[0018] The hoisting mechanism can be a crane or a gantry crane, and can be adjusted according to different sites.

[0019] Furthermore, the horizontal hoisting fixture includes a fixture body 42, one end of which is rotatably connected by a hinge shaft 43, and the other end is an open end. A mounting part protruding from the fixture body is provided at the open end, and a screw hole is provided on the mounting part. The open end is fixed by a bolt 44 passing through the screw hole.

[0020] Specifically, the clamp body has a bi-lobed symmetrical structure, each lobe being a semi-circle. The two lobes combine to form a complete circle that fits the reinforcing ring. Multiple clamps of different sizes can be provided for different reinforcing ring specifications. Each clamp body has a hinge mounting hole at one end, with a hinge shaft installed inside; the other end is a locking mounting part. The inner diameter of the clamp body matches the outer diameter of the reinforcing ring. Of course, a certain amount of clearance needs to be left to prevent thermal expansion of the reinforcing ring during heating.

[0021] Furthermore, at the open end, a reinforcing rib 45 is provided between the mounting part and the fixture body. The mounting part is specifically a thick plate structure with lugs, and the screw holes penetrate the lugs. High-strength heat-resistant bolts are used.

[0022] Furthermore, the engine cylinder liner vertical bracket is internally provided with several rollers 7. The rollers are arranged in a ring and can be arranged in multiple layers to guide the engine cylinder liner. The rollers are located near the lower middle of the bracket, away from the head of the engine cylinder liner when the heating sleeve is installed, so that the material of the rollers does not need to be considered separately.

[0023] When the reinforcing ring is heated, it is placed within the alternating magnetic field of the electromagnetic heating device. The magnetic field lines cut through the metal surface, inducing eddy currents inside the workpiece. Due to the resistance of the metal, the eddy currents generate Joule heat due to resistance loss as they flow, causing the workpiece to heat up rapidly. This technology replaces the traditional, dangerous, and uneven flame heating. Heating is more uniform, controllable, and safe, and its mobility improves site flexibility. The mobile electromagnetic heating device used in this invention can be an existing technology, such as the PIEN-500WT-J. The vehicle can be a trolley or a wheeled platform. In the prior art, such trolleys are manually controlled, but in other optional embodiments, they can be automatically controlled. The electromagnetic heating device is a liftable or horizontally movable electromagnetic induction coil frame. During heating, the coil can be placed on the outer wall of the reinforcing ring on the vehicle. After heating is complete, the electromagnetic heating device is removed, ready for hoisting.

[0024] The specific usage process of this utility model is as follows:

[0025] Install a horizontal hoisting fixture on the outside of the reinforcing ring; place the reinforcing ring to be assembled on the vehicle platform of the mobile heating mechanism.

[0026] Operate the electromagnetic heating device, placing its electromagnetic induction coil around the outer wall of the reinforcing ring. Start the electromagnetic heating to uniformly heat the reinforcing ring to the predetermined expansion temperature. After heating is complete, move the electromagnetic coil frame horizontally or vertically away from the high-temperature reinforcing ring.

[0027] During the hoisting process, the hoisting mechanism lowers four hooks, and the operator hooks the four hooks into the four lifting lugs on the outer wall of the clamp.

[0028] The crane slowly lifts the fixture, along with the heated reinforcing ring, from the heated car body smoothly and horizontally using a four-point lifting method.

[0029] The engine cylinder liner to be assembled is pre-suspended vertically in the engine cylinder liner vertical bracket. The bottom of the cylinder liner is firmly seated on the bottom positioning device of the bracket to ensure verticality.

[0030] Operate the overhead crane to move the hoisted reinforcing ring directly above the vertical support. Slowly lower the reinforcing ring. The operator observes the alignment; if fine adjustments are needed, gently move the cylinder liner using a pry bar or other tools. Once the heated and expanded reinforcing ring is precisely aligned with the cylinder liner head, continue lowering. The reinforcing ring, relying on gravity and thermal expansion, smoothly slides onto the cylinder liner head to the predetermined position.

[0031] Keep the position stable and allow the reinforcing ring to cool and shrink naturally to complete the interference fit assembly.

[0032] Loosen the lifting bolts, open the clamp, and move the overhead crane away from the empty clamp to complete the assembly.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A marine engine cylinder liner reinforcing ring hot assembly system, characterized in that, The device includes a hoisting mechanism, a mobile heating mechanism, and an engine cylinder liner vertical support. The mobile heating mechanism includes a vehicle body and an electromagnetic heating device disposed on one side of the vehicle body, as well as a reinforcing ring disposed on the vehicle body. A horizontal hoisting clamp is sleeved on the outside of the reinforcing ring. The horizontal hoisting clamp is provided with at least four lifting lugs, which are evenly disposed on the outer wall of the clamp. The hoisting mechanism is provided with hooks that match the number of lifting lugs. The engine cylinder liner vertical support is vertically disposed on the ground, and the engine cylinder liner to be clamped is disposed inside the engine cylinder liner vertical support.

2. The marine engine cylinder liner reinforcing ring hot assembly system according to claim 1, characterized in that, The horizontal hoisting fixture includes a fixture body, one end of which is rotatably connected by a hinge shaft, and the other end is an open end. A mounting part protruding from the fixture body is provided at the open end, and a screw hole is provided on the mounting part. The open end is fixed by a bolt passing through the screw hole.

3. The marine engine cylinder liner reinforcing ring hot assembly system according to claim 2, characterized in that, At the opening end, a reinforcing rib structure is provided between the mounting part and the fixture body.

4. The marine engine cylinder liner reinforcing ring hot assembly system according to claim 1, characterized in that, The engine cylinder liner vertical support is equipped with several rollers inside.

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