Marine diesel engine rack head end aligning device

Abstract

The invention belongs to the field of marine diesel engine manufacturing, and particularly relates to a marine diesel engine rack head end alignment device. The marine diesel engine rack head end alignment device comprises first round steel and second round steel. The first round steel and the second round steel coincide in axis. The MD type top weight is connected between the first round steel and the second round steel; a flange plate is fixedly connected to the outer end of the first round steel and used for being connected with a rack plate at the head end of a rack through bolts. The outer end of the second round steel is fixedly connected with a square plate used for being welded to a fixing block of a rack. A telescopic control hole is formed in the MD type top weight, the length of the MD type top weight is adjusted through the telescopic control hole, and perpendicularity control over the head end and the bottom of the rack is achieved. The welding-free design is adopted, damage to the rack body is avoided, the assembling efficiency is improved, high universality is achieved, and the diesel engine rack assembly can adapt to diesel engine racks of various cylinder diameters.

Description

Technical Field

[0001] The present invention belongs to the field of marine diesel engine manufacturing, and particularly relates to an adjusting device for the head end of a marine diesel engine frame. Background Art

[0002] The marine diesel engine frame is a fixed bracket installed on the engine base, mainly used for installing cylinders and forming a closed crankcase together with the engine base. The marine diesel engine frame is a support structure, which is located between the cylinder block and the engine base in a marine low-speed heavy diesel engine. The main function of the frame is to support the intake, exhaust, fuel and other accessory systems of the diesel engine, and mount these accessories on the frame beside the diesel engine for easy maintenance and replacement. In addition, the frame also undertakes the important task of jointly forming a closed crankcase with the engine base.

[0003] The manufacturing process of the marine low-speed diesel engine frame mainly includes steps such as dividing the frame into different modules, cutting and blanking the component plates, and processing and welding. Specifically, the first step of the manufacturing process is to divide the frame into three modules: the head section of the frame, the middle section of the frame, and the tail section of the frame, where the middle section module of the frame includes several frame middle sections with the same structure and size. The second step is to cut and blank all the component plates of each section of the frame according to the design dimensions of the frame, then process and weld the bevels, and finally classify and store the plates.

[0004] In the prior art, when installing the head end of a marine diesel engine frame, it is necessary to weld a pipe shuttle tool to the head end of the frame and the fixing block, which is not only inefficient, but also has poor versatility, and at the same time will damage the marine diesel engine frame and the tool. Summary of the Invention

[0005] In order to solve the problems of low installation efficiency, low versatility, and damage to the marine diesel engine frame and tools in the prior art, the present invention proposes an adjusting device for the head end of a marine diesel engine frame, including: a first round steel and a second round steel; the axes of the first round steel and the second round steel coincide; an MD type top code, connected between the first round steel and the second round steel; a flange plate is fixedly connected to the outer end of the first round steel for bolt connection with the frame plate at the head end of the frame; a square plate is fixedly connected to the outer end of the second round steel for welding to the fixing block of the frame; a telescopic control hole is provided on the MD type top code, and the length of the MD type top code is adjusted through the telescopic control hole to realize the perpendicularity control of the head end and the bottom of the frame; the first round steel and the second round steel are made of high-strength alloy steel and the surfaces are treated with rust prevention; the thickness range of the flange plate and the square plate is 10-20 mm, and the edges are provided with chamfers; the telescopic control hole is a long strip through hole, and the length direction is perpendicular to the axes of the first round steel and the second round steel; the device realizes compatibility and adaptation to the head ends of diesel engine frames with different cylinder diameters by adjusting the length between the first round steel and the second round steel; a locking mechanism is provided inside the MD type top code for fixing the adjusted telescopic state.

[0006] According to the marine diesel engine frame head-end alignment device described above, at least four symmetrically distributed bolt holes are provided on the flange plate, and the aperture of the bolt holes matches the frame plate.

[0007] According to the marine diesel engine frame head-end alignment device described above, the welding surface of the square plate is roughened to enhance the welding strength.

[0008] According to the marine diesel engine frame head-end alignment device described above, the adjustment accuracy of the telescopic control hole is ±0.5 mm.

[0009] According to the marine diesel engine frame head-end alignment device described above, the first round steel, the second round steel are connected to the flange plate and the square plate by welding or integrally formed.

[0010] According to the marine diesel engine frame head-end alignment device described above, the MD type top code is made of cast iron and its surface is coated with a wear-resistant coating.

[0011] According to the marine diesel engine frame head-end alignment device described above, the locking mechanism is a manual knob or a hydraulic locking device.

[0012] According to the marine diesel engine frame head-end alignment device described above, the device further includes an auxiliary support rod, which is detachably connected to the middle parts of the first round steel and the second round steel.

[0013] According to the marine diesel engine frame head-end alignment device described above, scale lines are marked on the surfaces of the first round steel and the second round steel for indicating the adjustment amount.

[0014] According to the marine diesel engine frame head-end alignment device described above, shock pads are provided at the connection between the flange plate and the frame plate.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention adopts a combined structure of MD type top code, first round steel, second round steel, flange plate, square plate and telescopic control hole. The flange plate at the head-end of the frame is connected to the frame plate through bolts and telescopic adjustment. The square plate only needs to be welded to the fixed block, with a welding-free design, avoiding damage to the frame body.

[0017] 2. The telescopic control hole of the present invention is combined with scale lines, making the adjustment process intuitive and fast, realizing efficient adjustment, and the assembly efficiency is increased by more than 40%.

[0018] 3. By replacing the length of the round steel and adjusting the top code, the present invention has high versatility and can be adapted to diesel engine frames with various cylinder diameters. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the structure at the head end of the marine diesel engine frame of the present invention.

[0020] Figure 2 It is a schematic assembly diagram of the head end of the marine diesel engine frame.

[0021] Figure 3 It is an adjustment schematic diagram of the head end adjustment device of the marine diesel engine frame using the present invention.

[0022] In the figure: 1 - MD type top code, 2 - purification section module, 3 - flange plate, 4 - square plate, 5 - telescopic control hole, 6 - frame plate, 7 - fixing block. Specific implementation mode

[0023] Preferred implementation mode

[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0025] As Figures 1 to 3 shown: The head end adjustment device of the marine diesel engine frame includes: a first round steel 11 and a second round steel 12; the axes of the first round steel 11 and the second round steel 12 coincide; an MD type top code 1 is connected between the first round steel 11 and the second round steel 12; a flange plate 3 is fixedly connected to the outer end of the first round steel 2 for bolt connection with the frame plate 6 at the head end of the frame; a square plate 4 is fixedly connected to the outer end of the second round steel 12 for welding to the fixing block 7 of the frame; a telescopic control hole 5 is provided on the MD type top code 1, and the length of the MD type top code 1 is adjusted through the telescopic control hole 5 to realize the perpendicularity control of the head end and the bottom of the frame; the materials of the first round steel 11 and the second round steel 12 are high-strength alloy steel, and the surfaces are treated with rust prevention; the thickness ranges of the flange plate 3 and the square plate 4 are 10 - 20 mm, and chamfers are provided at the edges; the telescopic control hole 5 is a long strip through hole, and the length direction is perpendicular to the axes of the first round steel 11 and the second round steel 12; the device realizes compatible adaptation to the head ends of diesel engine frames with different cylinder diameters by adjusting the length between the first round steel 11 and the second round steel 12; a locking mechanism is provided inside the MD type top code 1 for fixing the adjusted telescopic state.

[0026] Four symmetrically distributed bolt holes are provided on the flange plate 3, and the aperture of the bolt holes matches that of the frame plate 6.

[0027] The welding surface of the square plate 4 is roughened to enhance the welding strength. The adjustment accuracy of the telescopic control hole 5 is ±0.5 mm. The first round steel 11, the second round steel 12 and the flange plate 3, the square plate 4 are connected by welding or integrally formed. The MD type top code 1 is made of cast iron and its surface is coated with a wear-resistant coating. The locking mechanism is a manual knob or a hydraulic locking device. The device also includes auxiliary support rods, which are detachably connected to the middle parts of the first round steel 11 and the second round steel 12. Scale lines are marked on the surfaces of the first round steel 11 and the second round steel 12 to indicate the adjustment amount. A shock-absorbing gasket is provided at the connection between the flange plate 3 and the frame plate 6.

[0028] The present invention relates to a device for adjusting the head end of a marine diesel engine frame, which is used to quickly and accurately adjust the perpendicularity between the head end and the bottom of the frame, and avoid damage to the frame and tools caused by traditional welding methods. The following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings.

[0029] As Figure 1 shown, the adjustment device mainly consists of the following components: MD type top code 1: As the core adjustment component, it is internally provided with a telescopic control hole 5. The telescopic amount of the MD type top code 1 is controlled by the tightening and loosening of the bolt in the telescopic control hole 5, so as to adjust the position of the head end of the frame. The MD type top code 1 is made of cast iron, and its surface is coated with a wear-resistant coating to extend its service life.

[0030] The first round steel 11 and the second round steel 12 are respectively arranged on both sides of the MD type top code 1, and are made of high-strength alloy steel, and their surfaces are treated with rust prevention. The outer end of the first round steel 11 is welded with a flange plate 3, and the outer end of the second round steel 12 is welded with a square plate 4. The lengths of the first round steel 11 and the second round steel 12 can be adjusted according to the cylinder diameter of the frame, and scale lines are marked on their surfaces to assist in adjusting the length of the device.

[0031] The flange plate 3 and the frame plate 6 at the head end of the frame are connected by bolts. The bolt holes are symmetrically distributed, and the hole diameter matches the flange of the frame plate 6 to ensure a firm connection.

[0032] The square plate 4 is welded to the fixed block 7, and the welding surface is sandblasted to enhance the adhesion.

[0033] As Figure 2 shown: Installation and adjustment steps:

[0034] 1 Pre-installation: Align the flange plate 3 with the flange plate 6 at the head end of the frame and fix it with high-strength bolts; weld the square plate 4 to the fixed block 7, and clean the welding slag after welding.

[0035] 2 Adjust the perpendicularity: Loosen the fastening bolt of the telescopic control hole 5, and adjust the position of the head end of the frame by the telescopic movement of the MD type top code 1. Observe the scale line or use a level to measure until the perpendicularity between the head end of the frame and the bottom reaches the requirement: accuracy ±0.5 mm.

[0036] 3 Locking device: After the adjustment is completed, tighten the locking mechanism of the MD type top code 1 to ensure that the device remains stable in a vibrating environment.

[0037] To adapt to different models of diesel engines, the first round steel 11 and the second round steel 12 are designed to be replaceable, and the length range covers 500 - 1200 mm. The auxiliary support rod can be installed under long-span working conditions to further improve stability.

[0038] Taking an existing marine diesel engine as an example, the aperture of the flange at the head end of the engine frame is Φ20 mm, and the distance between the fixed blocks is 800 mm. Select the corresponding length of round steel 2, and after installation, adjust it through the telescopic control hole 5. The verticality calibration can be completed within 10 minutes, and the accuracy reaches 0.3 mm, which is much higher than the ±1 mm of the traditional process.

[0039] In summary, the present invention solves the problems of low efficiency and large damage in the prior art through modular design and precise adjustment mechanism, and has significant practical value. The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A marine diesel engine frame head end alignment device, characterized in that: include: A first round steel (11) and a second round steel (12); the axes of the first round steel (11) and the second round steel (12) coincide with each other; an MD type top bracket (1) is connected between the first round steel (11) and the second round steel (12); a flange plate (3) is fixedly connected to the outer end of the first round steel (2) and is used to be connected to a frame plate (6) at the head end of the frame by bolts; a square plate (4) is fixedly connected to the outer end of the second round steel (12) and is used to be welded to a fixing block (7) of the frame; a telescopic control hole (5) is provided on the MD type top bracket (1), and the length of the MD type top bracket (1) is adjusted through the telescopic control hole (5) to achieve the end of the head end of the frame and the bottom The verticality control of the first round steel (11) and the second round steel (12) is performed by adjusting the length between the first round steel (11) and the second round steel (12) to achieve compatibility with the head end of the diesel engine frame of different cylinder diameters; the MD type top bracket (1) is provided with a locking mechanism inside to fix the telescopic state after adjustment.

2. The marine diesel engine frame head end alignment device according to claim 1, characterized in that: The flange plate (3) is provided with at least four symmetrically distributed bolt holes, and the diameters of the bolt holes match those of the frame plate (6).

3. The marine diesel engine frame head end alignment device according to claim 2, characterized in that: The welding surface of the square plate (4) is roughened to enhance the welding strength.

4. The marine diesel engine frame head end alignment device according to claim 3, characterized in that: The adjustment accuracy of the telescopic control hole (5) is ±0.5 mm.

5. The marine diesel engine frame head end alignment device according to claim 1 or 4, characterized in that: The first round steel (11), the second round steel (12), the flange plate (3) and the square plate (4) are connected by welding or integral molding.

6. The marine diesel engine frame head end alignment device according to claim 5, characterized in that: The material of the MD type top bracket (1) is cast iron, and the surface is coated with a wear-resistant coating.

7. The marine diesel engine frame head end alignment device according to claim 6, characterized in that: The locking mechanism is a manual knob or a hydraulic locking device.

8. The marine diesel engine frame head end alignment device according to claim 7, characterized in that: The device also includes an auxiliary support rod which is detachably connected to the middle parts of the first round steel (11) and the second round steel (12).

9. The marine diesel engine frame head end alignment device according to claim 8, characterized in that: The surfaces of the first round steel (11) and the second round steel (12) are marked with scale lines for indicating the adjustment amount.

10. The marine diesel engine frame head end alignment device according to claim 9, characterized in that: A shock-absorbing gasket is provided at the connection between the flange plate (3) and the frame plate (6).

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