Ship crosshead lubricating oil skid-mounting structure and method

Abstract

The invention provides a ship crosshead lubricating oil skid-mounting structure and method.The ship crosshead lubricating oil skid-mounting structure comprises a public base which comprises a frame structure built by vertical profiles and transverse profiles and is connected with an iron outfitting platform of a ship body; the filters are sequentially arranged in the frame body structure built by the public base side by side, and the installation heights of the filters are the same; the plurality of crosshead lubricating oil pumps are sequentially arranged side by side in the frame body structure constructed by the public base, the mounting heights of the crosshead lubricating oil pumps are the same, and the crosshead lubricating oil pumps are parallel to the filter. Through the integrated crosshead lubricating oil system, the technical problems that construction is inconvenient and the preparation cost is high due to the fact that space is wasted by an existing container ship and system equipment is installed in a distributed mode are solved.

Description

Technical Field

[0001] The present application belongs to the field of shipbuilding technology, and in particular relates to a ship crosshead lubricating oil skid-mounted structure and method. Background Art

[0002] In the traditional design of the crosshead lubricating oil system of ships, the layout of the engine room equipment is usually based on the principle of decentralized installation. Key equipment such as the main engine crosshead lubricating oil pump, automatic backwash filter, and lubricating oil bypass filter are independently distributed on the bottom of the engine room, lacking a unified base support, and the equipment base and pipeline bracket need to be welded separately. This type of design has the following defects: 1) Complex construction and high cost: The independent installation of each device leads to a complicated pipeline layout and a large number of elbows, requiring a large amount of welding work, which not only consumes materials (such as steel and welding materials), but also greatly increases labor and time costs. Taking a container ship as an example, the independent base welding time of a single main engine crosshead lubricating oil pump can reach more than 30 hours, and the cross-arrangement of the pipeline is prone to cause space conflicts and needs to be adjusted repeatedly. 2) Inconvenient maintenance and operation: The decentralized equipment leads to the scattered distribution of instruments and control components (such as button boxes), and operators need to operate across regions, increasing the risk of misoperation; at the same time, the narrow maintenance channel is difficult to meet the needs of filter cleaning and pump body overhaul, affecting maintenance efficiency. 3) Debugging lag: Traditional designs require equipment circuit connection and debugging to be completed at the dock stage, while only preliminary installation can be performed at the dock stage, which prolongs the debugging cycle and slows down the overall shipbuilding progress. 4) Safety and stability hazards: Vertical crosshead lubricating oil pumps and other dynamic equipment are prone to resonance due to vibration transmission from the bottom of the engine room due to the lack of integrated support. Long-term operation may cause equipment damage or pipeline leakage.

[0003] Although the existing technology attempts to alleviate the above problems by optimizing the pipeline direction or adding local support, it has not fundamentally solved the systemic defects caused by the dispersion of equipment. Therefore, a highly integrated and modular design method is urgently needed to simplify the construction process, reduce costs and improve system reliability. Summary of the invention

[0004] In view of the shortcomings of the prior art described above, the purpose of the present application is to provide a ship crosshead lubricating oil skid-mounted structure and method to solve the technical problems of the existing container ship's wasted space for decentralized installation of system equipment, resulting in inconvenient construction and high preparation costs.

[0005] In a first aspect, the present application provides a ship crosshead lubricating oil skid-mounted structure, comprising:

[0006] The common base includes a frame structure constructed of vertical and transverse profiles and connected to the iron outfitting platform of the ship;

[0007] A plurality of filters are arranged side by side in a frame structure built on a common base, and each filter is installed at the same height;

[0008] A plurality of crosshead lubricating oil pumps are arranged in parallel in a frame structure built on a common base. The installation height of each crosshead lubricating oil pump is the same and they are arranged in parallel with the filter.

[0009] In an optional embodiment, the filter includes two lubricating oil self-cleaning filters and one lubricating oil bypass filter.

[0010] In an optional implementation manner, there is a maintenance space between adjacent filters, and the distance of the maintenance space is between 400 mm and 800 mm.

[0011] In an optional embodiment, the inlet and outlet of each filter are located on the same side of the device.

[0012] In an optional implementation manner, the number of the crosshead lubricating oil pumps is two.

[0013] In an optional implementation manner, the outlet height of the filter and the inlet height of the crosshead lubricating oil pump are located on the same plane.

[0014] In an optional embodiment, the common base includes a crosshead lubricating oil pump base for installing a crosshead lubricating oil pump, a self-cleaning filter base for installing a lubricating oil self-cleaning filter, and a bypass filter base for installing a lubricating oil bypass filter.

[0015] In an optional implementation manner, connecting pieces are provided between both sides of the crosshead lubricating oil pump and the common platform for active vibration reinforcement.

[0016] In a second aspect, the present application provides a method for skidding lubricating oil for a ship crosshead, comprising at least the following steps:

[0017] Step S1: two lubricating oil self-cleaning filters and one lubricating oil bypass filter are placed side by side in sequence, and a main channel working space at the bottom layer and maintenance space between adjacent filters are reserved;

[0018] Step S2: Make the main lubricating oil pipe into a pipe bundle, match the outlet height of the main lubricating oil pump, set the inlet height of each filter, set the inlet height of the crosshead lubricating oil pump on the same plane according to the outlet height of each filter, and place the inlet and outlet of each filter on the same side of the equipment;

[0019] Step S3: According to the equipment positions arranged in steps S1 and S2, design the corresponding outfitting base, including a common platform and an iron outfitting platform; wherein the common platform includes a crosshead lubricating oil pump base for installing a crosshead lubricating oil pump, a self-cleaning filter base for installing a lubricating oil self-cleaning filter, and a bypass filter base for installing a lubricating oil bypass filter; the iron outfitting platform includes a main channel of the lower platform of the cabin and a working channel of the crosshead lubricating oil pump.

[0020] In an optional implementation manner, the method further includes step S4: actively vibrating and reinforcing the crosshead oil pump and the common platform using a connector.

[0021] Compared with the prior art, the technical solution provided by this application has the following beneficial effects:

[0022] The crosshead lubricating oil skid-mounted structure and method provided in this application provide operating space for subsequent construction and engine room. The crosshead lubricating oil skid-mounted structure is arranged in the form of a unit skid. During the design, the system main equipment is complete and fully functional, and multiple crosshead lubricating oil pumps and multiple filters of the turbine equipment are deeply integrated; the operating platform and maintenance platform of electrical equipment and outfitting are taken into consideration, and then arranged in the form of a public base, which is easy to install, and the installation of various equipment and piping systems can be completed in the workshop, which greatly saves production costs. In addition, after the unit is manufactured, the equipment can also be debugged in the dock. Compared with the traditional dock stage debugging, this step is completed in advance, which optimizes the ship manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The diagram shows the schematic diagram of the ship's crosshead lubricating oil skid structure;

[0024] Figure 2 The front view of the ship's crosshead lubricating oil skid structure is shown;

[0025] Figure 3 Shown is a top view of the ship's crosshead lubricating oil skid structure;

[0026] Figure 4 Shown is a side view of the ship's crosshead lubricating oil skid structure;

[0027] Figure 5 Shown is a schematic diagram of the pump body reinforcement structure of a crosshead lubricating oil pump;

[0028] Figure 6 Shown is the flow chart of the ship's crosshead lubricating oil skid-mounted system.

[0029] In the figure:

[0030] 1. First stop check valve; 2. First manual butterfly valve; 3. Second manual butterfly valve; 4. Third manual butterfly valve; 5. Fourth manual butterfly valve; 6. Fifth manual butterfly valve; 7. Second lubricating oil self-cleaning filter; 8. Sixth manual butterfly valve; 9. First lubricating oil self-cleaning filter; 10. Seventh manual butterfly valve; 11. Pressure difference switch; 12. Lubricating oil bypass filter; 13. Eighth manual butterfly valve; 14. Second crosshead lubricating oil pump; 15. Ninth butterfly valve; 16. First crosshead lubricating oil pump; 17. Tenth butterfly valve; 18. Pressure stabilizer; 19. Second stop check valve; 20. Third stop check valve; 21. Pressure switch;

[0031] 100. Common base; 110. Crosshead lubricating oil pump base; 120. Self-cleaning filter base; 130. Bypass filter base; 140. Connecting piece. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] For ease of description, spatial relational terms such as "under", "below", "below", "below", "above", "on", etc. may be used herein to describe the relationship of one element or feature shown in the drawings to other elements or features. It will be understood that these spatial relational terms are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or there can be one or more intervening layers. As used herein, "between..." means including the end point values.

[0034] In the context of the present application, a structure in which a first feature is described as being "above" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0035] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and therefore the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0036] Embodiment 1:

[0037] See also Figure 1 to Figure 6 This embodiment provides a crosshead lubricating oil skid structure for ships. The skid design is arranged on the bottom floor of the ship's engine room and mainly includes the following integrated equipment: 1) Engine equipment: crosshead lubricating oil pump, lubricating oil self-cleaning filter, lubricating oil bypass filter, valve accessories. 2) Outfitting parts: equipment base, common base. 3) Electrical equipment: crosshead lubricating oil pump operation button box, pressure switch, etc.

[0038] It is understandable that the main engine is an extremely important piece of equipment in marine equipment, providing propulsion power for the entire ship and being called the "heart" of the ship. The lubricating oil system is an important auxiliary system to ensure the normal operation of the main engine, providing lubricating oil for the main engine, ensuring effective lubrication between the main engine's moving parts and promptly removing the heat generated by friction or combustion of the parts, thereby achieving the cooling function.

[0039] The main engine lubricating oil system includes two aspects: conventional lubricating oil and crosshead lubricating oil. Conventional lubricating oil is used for main bearings and piston cooling, etc., and is supplied by the main lubricating oil pump; crosshead lubricating oil is used for the main engine crosshead bearing. Because the crosshead bearing requires a larger lubricating oil pressure during operation, a crosshead lubricating oil pump is installed at the outlet of the main lubricating oil pump to pressurize the lubricating oil.

[0040] However, in the process of ship construction, secondary pollution is inevitable due to the oil circulation tank, system pipelines, etc. Although the system will perform oil cleaning before the main motor vehicle, it is difficult to ensure that particulate matter and garbage in the system are completely removed. At the same time, during the operation of the main engine, various moving parts such as bearings will also produce metal chips. In order to prevent these external impurities from entering the bearing coupling and causing bearing damage, or entering the cooling chamber and clogging, which will eventually cause main engine failure, the system is specially equipped with an automatic lubricating oil backwash filter to remove the impurity particles here in real time.

[0041] The ship crosshead lubricating oil skid-mounted structure provided in this embodiment includes a common base, and a plurality of filters and a plurality of crosshead lubricating oil pumps arranged in a frame structure constructed by the common base 100 .

[0042] Specifically, the common base 100 includes a frame structure constructed of vertical profiles and transverse profiles, and is connected to the iron outfitting platform of the hull. For example, the common base 100 is welded by vertical profiles and transverse profiles, the vertical profiles are selected from H-shaped steel with a specification of 200mm×200mm, and the transverse profiles are selected from channel steel with a specification of 160mm×60mm. The grid frame size formed by welding is 6m long×2.2m wide×0.5m high, and the frame structure is fixed to the iron outfitting platform of the hull by M20 bolts. The common base 100 integrates and unifies the bases of various equipment, the brackets of the piping system, and other outfitting supports, and is the basis and guarantee for the skid design of the crosshead lubricating oil pump. Further, the common base 100 includes a crosshead lubricating oil pump base 110 for installing a crosshead lubricating oil pump, a self-cleaning filter base 120 for installing a lubricating oil self-cleaning filter, and a bypass filter base 130 for installing a lubricating oil bypass filter. Modular prefabrication can reduce on-site welding by 30%, significantly reducing labor costs. The three split bases are suitable for different equipment loads, effectively avoiding local structural deformation.

[0043] Specifically, several filters are arranged in parallel in the frame structure built by the common base 100, which is the core equipment of the whole system. The filter is designed in series with the main lubricating oil pump and is located on the discharge side of the main lubricating oil pump. The function is to pressurize the main lubricating oil and inject it into the crosshead lubricating oil interface of the main engine to meet the 10bar~13bar lubricating oil operating pressure requirement of the crosshead of the main engine. Further, the installation height of each filter is the same; the outlet height of the filter is located on the same plane as the inlet height of the crosshead lubricating oil pump, and the inlet and outlet of each filter are located on the same side of the equipment. Further, the filter includes two lubricating oil self-cleaning filters and one lubricating oil bypass filter, such as the first lubricating oil self-cleaning filter 9, the second lubricating oil self-cleaning filter 7 and the lubricating oil bypass filter 12. Further, there is a maintenance space between adjacent filters, and the distance of the maintenance space is between 400mm and 800mm, such as 500mm, 600mm or 700mm. Generally, the 600mm spacing meets the operation requirements of filter element replacement tools, such as filter element wrenches, and the maintenance efficiency is improved.

[0044] Specifically, there are two crosshead oil pumps, including a first crosshead oil pump 16 and a second crosshead oil pump 14 . The installation height of each crosshead oil pump is the same and they are arranged in parallel with the filter.

[0045] Optionally, the first lubricating oil self-cleaning filter 9 and the second lubricating oil self-cleaning filter 7 are both configured with a built-in 34μ (absolute accuracy) backwash filter element, which is used to remove metal grinding chips and mixed particulate garbage generated by the operation of the main engine in the lubricating oil to prevent the bearing from being worn. Optionally, the filtering accuracy of the lubricating oil bypass filter 12 is the same as that of the backwash filter, and it is temporarily replaced when the backwash filter fails to repair, so as to avoid the main engine running without protection.

[0046] See also Figure 5 Optionally, connectors 140 are provided on both sides of each crosshead oil pump and between the two sides and the common platform for active vibration reinforcement. The first crosshead oil pump 16 and the second crosshead oil pump 14 are installed side by side on the right side of the common base 100, fixed to the crosshead oil pump base 110 by flanges, and aligned with the filter height. The two sides of the pump body are hinged to the vertical or horizontal profiles by hinge connectors 140, and polyurethane shock-absorbing pads are installed at the motor lifting eyes. After active vibration reinforcement, the vibration amplitude was reduced to 0.3mm and the noise was reduced from 85dB to 70dB after actual ship testing, further ensuring the stability of the system structure and operation.

[0047] It can be understood that the system also includes necessary accessories such as an electrical operation button box to realize the operation of the system. For example, the electrical operation button box serves as an operating device for the crosshead lubricating oil pump and can control the start and stop of the pump.

[0048] The operation process of the crosshead lubricating oil skid-mounted system is as follows:

[0049] See also Figure 6 , showing the flow path of lubricating oil from the main pump to the filter and booster pump. The lubricating oil enters the first lubricating oil self-cleaning filter 9 and the second lubricating oil self-cleaning filter 7 from the main lubricating oil pump, enters the first crosshead lubricating oil pump 16 and the second crosshead lubricating oil pump 14 after filtering, and is pumped into the main engine interface after operation and boosting. When the first crosshead lubricating oil pump 16 fails and the pressure drops, for example, to 8 bar, the second crosshead lubricating oil pump 14 automatically starts through the pressure switch 21; if the outlet pressure increases sharply, for example, to 15 bar, the regulator 18 opens to release the pressure, and the lubricating oil bypasses the circulation to avoid overload and damage to the crosshead lubricating oil pump motor.

[0050] By adopting the crosshead lubricating oil skid-mounted structure provided in this embodiment, the area occupied by ship engine room equipment can be reduced by up to 35%, and material waste can be reduced by 20%; the filter replacement time is shortened to 20 minutes, the pump body can be hoisted without obstacles, and the overall failure rate is also reduced. This technical solution has been applied to many ships above 200,000 tons, and its economic benefits and safety are significantly better than traditional decentralized designs.

[0051] Embodiment 2:

[0052] This embodiment provides a method for skidding lubricating oil for a ship crosshead, comprising the following steps:

[0053] Step S1: Place two lubricating oil self-cleaning filters and one lubricating oil bypass filter side by side in sequence, reserving the main channel working space at the bottom layer and the maintenance space between adjacent filters.

[0054] Specifically, the main channel on the bottom floor is reserved with a width of 800mm for personnel to pass and transport emergency maintenance equipment, and a maintenance spacing of 600mm is reserved between adjacent filters to meet the needs of filter element replacement tool operation. The structural problem of the traditional decentralized layout that requires a separate channel for each filter is optimized, and the cabin equipment layout is compact, and the space utilization rate is improved while complying with safety regulations.

[0055] Step S2: Make the main lubricating oil pipe into a pipe bundle, match the outlet height of the main lubricating oil pump, set the inlet height of each filter, set the inlet height of the crosshead lubricating oil pump in the same plane according to the outlet height of each filter, place the inlet and outlet of each filter on the same side of the equipment, for example, uniformly toward the port side, and compress the Y-direction width; the filter inlet height is aligned with the outlet of the main lubricating oil pump, and the filter outlet height is flush with the inlet of the crosshead lubricating oil pump to avoid elbow resistance, so that the pressure loss is reduced to 5%, and the main engine lubricating oil pressure is stabilized at 12 bar.

[0056] Step S3: According to the equipment positions arranged in steps S1 and S2, design the corresponding outfitting base, including a common platform and an iron outfitting platform; wherein the common platform includes a crosshead lubricating oil pump base for installing a crosshead lubricating oil pump, a self-cleaning filter base for installing a lubricating oil self-cleaning filter, and a bypass filter base for installing a lubricating oil bypass filter; the iron outfitting platform includes a main channel of the lower platform of the cabin and a working channel of the crosshead lubricating oil pump.

[0057] Step S4: Considering that the crosshead oil pump of the dynamic equipment is arranged at the bottom of the cabin and is close to the main engine, and the center position of the vertical pump is relatively high, it is easy to vibrate under the combined action of multiple factors. Therefore, it is considered to use the motor lifting eye to use a connector to articulate with the main platform to actively strengthen the vibration. The crosshead oil pump and the public platform are actively strengthened by using a connector 140 to enhance the structural stability of the cabin equipment and increase the service life of the equipment.

[0058] The PLC control module of the present invention is arranged outside the skid, and there is no effective external power supply, so it is impossible to perform effective debugging in the workshop. During the docking stage, the skid can be hoisted onto the ship and connected to the PLC control module and the external power supply before debugging. After the skid is hoisted, the external PLC control module and the 380V power supply are connected, and the standby pump switching is triggered by the pressure switch (set value 10bar). The system debugging is completed within 30 minutes. The pre-wiring design is used during the debugging stage, and the functional verification is completed in 2 hours in the dock, which is significantly shortened compared with the traditional debugging time.

[0059] The ship crosshead lubricating oil skid installation method provided in this embodiment shortens the construction period by 30% and reduces material waste by 25% through space optimization layout, pipeline height alignment, base modular integration, and intelligent vibration suppression; it achieves significant economic benefits; through anti-skid design, redundant pump configuration and rapid fault response, it ensures the continuous operation of the main engine and the safety of system operation; the standardized design of the skid is suitable for multiple ship types.

[0060] In summary, the ship crosshead lubricating oil skid-mounted structure and method provided by the present application provide operating space for subsequent construction and the engine room. The crosshead lubricating oil skid-mounted structure is arranged in the form of a unit skid. During the design, the system main equipment is complete and fully functional, and multiple crosshead lubricating oil pumps and multiple filters of the turbine equipment are deeply integrated; electrical equipment, outfitting operating platforms, maintenance platforms, etc. are taken into consideration, and then arranged in the form of a common base, which is easy to install, and the installation of various equipment and piping systems can be completed in the workshop, which greatly saves production costs. In addition, after the unit is manufactured, the equipment can also be debugged in the dock. Compared with the traditional dock stage debugging, this step is completed in advance, which optimizes the ship manufacturing process. Therefore, the technical solution provided by the present application has a high industrial utilization value because it effectively overcomes the various shortcomings in the prior art.

[0061] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A ship crosshead lubricating oil skid-mounted structure, characterized in that: include: The common base includes a frame structure constructed of vertical and transverse profiles and connected to the iron outfitting platform of the ship; A plurality of filters are arranged side by side in a frame structure built on a common base, and each filter is installed at the same height; A plurality of crosshead lubricating oil pumps are arranged in parallel in a frame structure built on a common base. The installation height of each crosshead lubricating oil pump is the same and they are arranged in parallel with the filter.

2. The ship crosshead lubricating oil skid-mounted structure according to claim 1 is characterized in that: The filter comprises two lubricating oil self-cleaning filters and one lubricating oil bypass filter.

3. The ship crosshead lubricating oil skid-mounted structure according to claim 2 is characterized in that: There is a maintenance space between adjacent filters, and the distance between the maintenance spaces is between 400 mm and 800 mm.

4. The ship crosshead lubricating oil skid-mounted structure according to claim 2, characterized in that: The inlet and outlet of each filter are located on the same side of the device.

5. The ship crosshead lubricating oil skid-mounted structure according to claim 2, characterized in that: The number of the crosshead lubricating oil pumps is two.

6. The ship crosshead lubricating oil skid-mounted structure according to claim 5, characterized in that: The outlet height of the filter and the inlet height of the crosshead lubricating oil pump are located on the same plane.

7. The ship crosshead lubricating oil skid-mounted structure according to claim 2, characterized in that: The common base includes a crosshead lubricating oil pump base for installing a crosshead lubricating oil pump, a self-cleaning filter base for installing a lubricating oil self-cleaning filter, and a bypass filter base for installing a lubricating oil bypass filter.

8. The ship crosshead lubricating oil skid-mounted structure according to claim 2, characterized in that: Connectors are provided between both sides of the crosshead lubricating oil pump and the common platform to perform active vibration reinforcement.

9. A method for skidding lubricating oil for a ship crosshead, characterized in that: At least the following steps are included: Step S1: two lubricating oil self-cleaning filters and one lubricating oil bypass filter are placed side by side in sequence, and a main channel working space at the bottom layer and maintenance space between adjacent filters are reserved; Step S2: Make the main lubricating oil pipe into a pipe bundle, match the outlet height of the main lubricating oil pump, set the inlet height of each filter, set the inlet height of the crosshead lubricating oil pump on the same plane according to the outlet height of each filter, and place the inlet and outlet of each filter on the same side of the equipment; Step S3: According to the equipment positions arranged in steps S1 and S2, design the corresponding outfitting base, including a common platform and an iron outfitting platform; wherein the common platform includes a crosshead lubricating oil pump base for installing a crosshead lubricating oil pump, a self-cleaning filter base for installing a lubricating oil self-cleaning filter, and a bypass filter base for installing a lubricating oil bypass filter; the iron outfitting platform includes a main channel of the lower platform of the cabin and a working channel of the crosshead lubricating oil pump.

10. The method for installing a ship crosshead lubricating oil on a skid according to claim 9, characterized in that: The method further includes step S4: actively vibrating and reinforcing the crosshead lubricating oil pump and the common platform using a connecting piece.

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