Carrying support for marine methanol dual-fuel low-speed engine cylinder cover

Abstract

A carrying support for a marine methanol dual-fuel low-speed engine cylinder cover comprises a base, a middle support, a pressing block stand column, a screw rod, a pressing block and a supporting disc, a methanol pressurizing unit is fixed to one side of the cylinder cover, and the overall mass center deviates to the side close to the methanol pressurizing unit; wherein the plane range of the base covers the orthocenter position of the whole mass center, the middle supports are fixed to the base, the supporting disc is horizontally fixed to all the middle supports and makes contact with the lower surface of a cylinder cover, the pressing block stand columns are fixed to the positions, on the sides, away from a methanol pressurizing unit, of the base of the middle supports so as to support the cylinder cover, and the pressing blocks are arranged on the upper surface of the cylinder cover. The cylinder cover is fixed to the pressing block stand column through the connecting bolt, the screw rod is arranged between the middle support and the methanol pressurizing unit, and the cylinder cover and the base are tensioned and fixed through the gasket and the fastening nut. Interference with accessories and side turning of the cylinder cover are avoided, integral lifting of the cylinder cover, the methanol pressurizing unit and the carrying support is achieved, convenience is provided for production, transportation and assembly operation, and the lifting device has the advantages of being small in occupied area and size and high in stability.

Description

Technical Field

[0001] The invention relates to the manufacture of a marine dual-fuel low-speed engine, in particular to a carrier bracket for a cylinder cover of a marine methanol dual-fuel low-speed engine, and belongs to the technical field of marine engine manufacturing. Background Art

[0002] With the continuous upgrading of products, the demand for methanol dual-fuel low-speed engines is increasing. Because the cylinder head assembly of a methanol dual-fuel low-speed engine is equipped with a methanol supercharging unit, the cylinder head assembly has a large mass eccentricity. During the production process and factory shipment, the cylinder head assembly is usually placed on a carrier for transportation.

[0003] The traditional cylinder head carrier has a conical symmetrical structure, which is small at the top and large at the bottom. It is used to support the severely eccentric methanol dual-fuel low-speed engine cylinder head, which is at risk of tipping over. Once toppling over, it will not only cause huge economic losses but also affect the production schedule. At the same time, the traditional cylinder head carrier occupies a large area and consumes a lot of production resources. In addition, the traditional cylinder head carrier uses the bolt holes on the side of the cylinder head to directly support the cylinder head, which often interferes with the accessories of the methanol cylinder head. Moreover, the methanol cylinder head needs to be sent to the shipyard after the pump pressure test is completed by the main engine plant, and there is no connection and fixation between the traditional cylinder head carrier and the cylinder head, so it cannot meet the lifting and transportation requirements during the transfer process.

[0004] In short, the traditional cylinder head carrier bracket cannot solve the problem of eccentric fixation of the methanol dual-fuel low-speed engine cylinder head during testing, nor can it be lifted as a whole together with the methanol cylinder head, making it difficult to adapt to the needs of transportation. At the same time, there are defects such as interference with the cylinder head assembly structure and accessories and occupying too much space, making it difficult to meet the production and transportation requirements of the methanol dual-fuel low-speed engine cylinder head. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a carrier bracket for the cylinder head of a marine methanol dual-fuel low-speed engine, so as to avoid the risk of tipping over due to eccentricity of the cylinder head of the methanol dual-fuel low-speed engine during transportation, overcome the defect of interference between the cylinder head bracket and the cylinder head structure and accessories, solve the problem that the bracket and the cylinder head as a whole occupy too much space and cannot be installed in the cabin during installation in the shipyard, realize the overall lifting of the carrier bracket and the cylinder head assembly, and create favorable conditions for production, transportation and assembly operations.

[0006] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0007] A carrier bracket for a cylinder head of a marine methanol dual-fuel low-speed engine, wherein a methanol supercharging unit is fixed to one side of the cylinder head of the marine methanol dual-fuel low-speed engine, and the overall center of mass of the cylinder head and the methanol supercharging unit is offset to the side of the cylinder head adjacent to the methanol supercharging unit; the carrier bracket is characterized in that:

[0008] The base has a plane range covering the position of the vertical center of mass of the cylinder head and the methanol booster unit;

[0009] A plurality of intermediate supports, upright and fixedly connected to the middle portion of the base;

[0010] a supporting disc, horizontally fixedly connected to all the intermediate supports, in contact with the lower surface of the cylinder head, and used for supporting the cylinder head in a suspended manner;

[0011] A plurality of pressing block columns are upright and fixedly connected to a base on one side of the intermediate support and are located on a side away from the methanol boosting unit, for supporting the cylinder head;

[0012] A plurality of pressing blocks are provided on the upper surface of the cylinder head and connected to the pressing block columns by penetrating connecting bolts, thereby fixing the cylinder head to the pressing block columns;

[0013] A plurality of screw rods are arranged between the intermediate support and the methanol booster unit, with the lower ends connected to the base and the upper ends passing through the cylinder cover, and the cylinder cover and the base are tightened and fixed by gaskets and fastening nuts.

[0014] Furthermore, a threaded hole for connecting the connecting bolt is provided on the top of the pressing block column.

[0015] Furthermore, the base is made of H-shaped steel by welding, the intermediate support is made of steel pipe, the pressure block column is welded by upright H-shaped steel and the iron block on its upper part, and the base, intermediate support, support disc and pressure block column are welded into an integrated structure.

[0016] Furthermore, the pressure block is a circular boss structure, the lower part of which is embedded in the bolt hole of the cylinder cover, the upper part has a diameter larger than the bolt hole, and the center is provided with a center hole for passing the connecting bolt.

[0017] Furthermore, a reinforcement beam is welded on the base, an oblique support is welded between the middle support and the base, and an angle steel for enhancing stability is welded between the side surface of the pressure block column and the base.

[0018] Furthermore, the base is provided with a through hole for passing the screw rod, and both ends of the screw rod are provided with external threads, which cooperate with the fastening nut to tighten the base and the cylinder cover.

[0019] Compared with the existing cylinder head carrier bracket, the beneficial technical effects of the present invention are as follows:

[0020] 1. The base of the carrier bracket is extended toward the center of mass of the cylinder head and the methanol booster unit. The plane range of the base covers the position of the vertical center of mass of the cylinder head and the methanol booster unit. A pressure block is provided on the side away from the center of mass to ensure the stability of the cylinder head assembly after being fixed on the carrier bracket, ensuring that it will not roll over, and solving the problem of eccentric fixation of the cylinder head of the marine methanol dual-fuel low-speed engine during transportation.

[0021] 2. The carrier bracket has only the supporting disc in contact with the lower surface of the cylinder head, and the supporting disc is held above the base by the intermediate support, thereby avoiding possible interference between other components of the carrier bracket and accessories on the cylinder head, while achieving a stabilizing effect.

[0022] 3. The carrier bracket adopts an integrated structure welded with steel. It not only reduces the weight of the carrier bracket and reduces the consumption of manufacturing materials compared with the traditional round base while ensuring the bending strength, but also reduces the footprint and volume of the carrier bracket, meeting the requirements of the cabin lifting opening size during assembly in the shipyard, creating favorable conditions for assembly operations.

[0023] 4. The carrier bracket is provided with a long screw for tightening and fixing between the cylinder head and the methanol booster unit. Combined with the fixation of the pressure block, it is possible to lift and transport the cylinder head, methanol booster unit and carrier bracket as a whole, which provides convenience for production, transportation and assembly operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a schematic diagram of the use of the present invention.

[0026] In the figure, 1 is the base, 2 is the middle support, 3 is the pressure block column, 4 is the screw, 5 is the pressure block, 6 is the gasket, 7 is the fastening nut, 8 is the connecting bolt, 9 is the support disc, 01 is the cylinder head, 02 is the methanol booster unit, and 03 is the carrier bracket. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments, but the scope of protection claimed in the present invention shall not be limited thereby.

[0028] The present invention is applicable to the support and transportation of the cylinder head assembly of the methanol dual-fuel low-speed engine used in ships. Figure 2 The cylinder head assembly includes a cylinder head 01 and a methanol supercharging unit 02 fixed on one side thereof. The overall center of mass of the cylinder head 01 and the methanol supercharging unit 02 is biased toward the side of the cylinder head 01 close to the methanol supercharging unit 02.

[0029] The main body of the carrier bracket 03 is welded together from a base 1, an intermediate support 2, and a pressure block column 3. Screws 4 and pressure blocks 5 are also designed on the outside of the main body. These two parts are connected to the main body via fasteners, forming a complete carrier bracket 03. The combination of screws 4, pressure blocks 5, gaskets 6, and fasteners forms a single unit with the cylinder head 01 and methanol booster unit 02, facilitating lifting and transportation.

[0030] See also Figure 1 The carrier bracket for the marine methanol dual-fuel low-speed engine cylinder head includes a base 1, an intermediate support 2, a pressing block column 3, a screw 4, a pressing block 5 and a support disc 9.

[0031] The base 1 is made of H-shaped steel by welding. H-shaped steel is lighter in weight while ensuring the supporting strength, which makes it easier to transport. The base 1 covers the center of mass of the cylinder head assembly, and the base 1 is only extended toward the center of mass. It not only ensures stability and does not roll over, but also occupies a smaller area than the traditional circular base, which can meet the size requirements of the cabin lifting opening. A through hole is also opened on the H-shaped steel of the base. When used in conjunction with the screw 4, the carrier bracket 03 can be fixed to the cylinder head 01 and the methanol booster unit 02 as a whole, so that the carrier bracket 03 can be lifted and transported together with the cylinder head assembly, and prevents rollover during transportation and lifting, which also provides convenience for workshop work.

[0032] The intermediate support 2 is made of a steel pipe and welded to the base 1 . At the same time, an inclined support is added to the steel pipe to improve the stability of the carrying bracket 03 .

[0033] The support disc 9 is welded into one piece with the base 1 through the intermediate support 2, and the support fits the bottom plane contour of the cylinder head 01. The support disc 9 is located above the base 1, which not only plays a supporting role to achieve a stabilizing effect, but also avoids interference between the carrier bracket 03 body and the accessories of the methanol cylinder head 01.

[0034] See also Figure 1 The pressure block columns 3 are welded to the base 1. The main body is made of H-shaped steel. An iron block with M42 threaded holes is welded above the H-shaped steel. The iron block and pressure block 5 are fixed together by connecting bolts 8, which prevent the cylinder head 01 from tipping over and allow the carrier bracket 03 and cylinder head 01 to be lifted and transported together. Angle steel is welded to the side of the H-shaped steel to enhance the stability of the carrier bracket 03. The base 1, intermediate support 2, support disc 9, and pressure block columns 3 are welded together to form the main body of the carrier bracket 03.

[0035] See also Figure 1The pressing block 5 is a circular boss structure. The lower part of the pressing block 5 can be embedded in the cylinder head bolt hole. The upper part of the pressing block 5 has a diameter larger than the cylinder head bolt hole. Combined with the M42 connecting bolt 8, the cylinder head 01 can be firmly fixed to one side of the pressing block 5 to prevent the cylinder head 01 from tipping over.

[0036] See also Figure 2 The screw rod 4 is threaded with M20 threads at both ends and is connected to the base 1 using the through-holes in the carrier bracket base 1 and the cylinder head bolt holes, along with the gasket 6 and M20 fastening nut 7. The screw rod 4 and the pressure block 5 combine to form a single unit, connecting the carrier bracket 03 with the cylinder head 01 and methanol booster unit 02 for easy lifting and transportation.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent changes and modifications made within the scope of the present invention should fall within the technical scope of the present invention.

Claims

1. A carrier bracket for a cylinder head of a marine methanol dual-fuel low-speed engine, wherein a methanol supercharging unit is fixed to one side of the cylinder head of the marine methanol dual-fuel low-speed engine, and the center of mass of the cylinder head and the methanol supercharging unit is offset to the side of the cylinder head adjacent to the methanol supercharging unit; characterized in that: The carrier bracket includes: The base has a plane range covering the position of the vertical center of mass of the cylinder head and the methanol booster unit; A plurality of intermediate supports, upright and fixedly connected to the middle portion of the base; a supporting disc, horizontally fixedly connected to all the intermediate supports, in contact with the lower surface of the cylinder head, and used for supporting the cylinder head in a suspended manner; A plurality of pressing block columns are upright and fixedly connected to a base on one side of the intermediate support and are located on a side away from the methanol boosting unit, for supporting the cylinder head; A plurality of pressing blocks are provided on the upper surface of the cylinder head and connected to the pressing block columns by penetrating connecting bolts, thereby fixing the cylinder head to the pressing block columns; A plurality of screw rods are arranged between the intermediate support and the methanol booster unit, with the lower ends connected to the base and the upper ends passing through the cylinder cover, and the cylinder cover and the base are tightened and fixed by gaskets and fastening nuts.

2. The carrier bracket for a low-speed cylinder head of a methanol dual-fuel marine engine according to claim 1, characterized in that: The top of the pressing block column is provided with a threaded hole for connecting the connecting bolt.

3. The carrier bracket for a low-speed cylinder head of a methanol dual-fuel marine engine according to claim 1, characterized in that: The base is made of H-shaped steel by welding, the middle support is made of steel pipe, the pressure block column is welded by upright H-shaped steel and the iron block on its upper part, and the base, middle support, support disc and pressure block column are welded into an integrated structure.

4. The carrier bracket for a cylinder head of a methanol dual-fuel low-speed marine engine according to claim 1, characterized in that: The pressing block is a circular boss structure, the lower part of which is embedded in the bolt hole of the cylinder cover, the upper part has a diameter larger than the bolt hole, and the center is provided with a center hole for passing the connecting bolt.

5. The carrier bracket for a low-speed cylinder head of a methanol dual-fuel marine engine according to claim 1, characterized in that: A reinforcement beam is welded on the base, an oblique support is welded between the middle support and the base, and an angle steel for enhancing stability is welded between the side surface of the pressure block column and the base.

6. The carrier bracket for a cylinder head of a methanol dual-fuel low-speed marine engine according to claim 1, characterized in that: The base is also provided with a through hole for passing the screw rod, and both ends of the screw rod are provided with external threads, which cooperate with the fastening nut to tighten the base and the cylinder cover.

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