Marine detachable main engine intermediate bearing base and mounting method

Abstract

The invention relates to a marine detachable main engine middle bearing engine base and an installation method, the marine detachable main engine middle bearing engine base comprises an upper half engine base and a lower half engine base, the upper half engine base and the lower half engine base are connected through bolts, a gasket is arranged on the lower half engine base, a plurality of stop blocks are arranged on the top surface of the lower half engine base, and the upper half engine base is enclosed through the stop blocks. The mode that the shaft generator and the main shaft are hung in synchronously is not adopted, and the shaft generator and the main shaft move from back to front. Only one piece of equipment is hoisted every time instead of synchronous hoisting of two pieces of equipment, the precision is easy to control, and the installation risk is greatly reduced. In addition, when the shaft needs to be disassembled in the ship operation process, the generator and the main shaft do not need to be hoisted out synchronously, and the upper half base is disassembled, then hoisting work is carried out, and then the upper half base is installed.

Description

Technical Field

[0001] The invention relates to the technical field of ship design, and in particular to a detachable main engine intermediate bearing base for a ship. Background Art

[0002] At present, due to the requirements of IMO regulations, ship owners and shipyards attach great importance to the effect of ship energy conservation and emission reduction. Due to its energy-saving effect, shaft generators are increasingly being installed on ships to achieve the purpose of energy conservation. The current practice is, for example, Figure 1 As shown in the figure, after the shaft generator and the main shaft are installed, they are hoisted in synchronously. The two are not fixed, and they are hoisted in by a set of hoisting tools. In this process, the relative position of the two cannot exceed the gap (h) value. For example, a 16K TEU container ship of a certain shipyard has a gap of only 400mm. The special feature of the shaft generator is that it does not contact the main shaft. The most important part of the shaft generator is the permanent magnet. During the process of the main shaft and the shaft generator being hoisted in synchronously, if they collide, the permanent magnet and the shell will be firmly attracted, which will cause permanent damage to the shaft generator and directly scrap it. The shaft generator is very expensive, so for the shipyard, it is a huge loss in terms of both material quantity and time cost. Similarly, when the shipowner needs to dismantle the shaft during the operation of the ship, the generator and the main shaft must be hoisted out synchronously. Since the ship repair yard is not as familiar with the hoisting process as the shipyard, the risk is greater. Summary of the invention

[0003] According to the technical problems raised above, a detachable marine main engine intermediate bearing base and an installation method are provided.

[0004] The technical means adopted by the present invention are as follows:

[0005] A detachable main engine intermediate bearing base for a ship comprises an upper base and a lower base, wherein the upper base and the lower base are connected by bolts, a gasket is arranged on the lower base, a plurality of stop blocks are arranged on the top surface of the lower base, and the upper base is surrounded by the stop blocks.

[0006] Furthermore, a lifting lug is provided at the top of the upper machine base.

[0007] Furthermore, the upper and lower machine bases are each in two sets, the number of the stop blocks is 8, and each set of the lower machine base is provided with four, including one in front of the lower machine base, one in the rear, and two on the outside of the lower machine base.

[0008] Furthermore, positioning pin holes are provided at corresponding positions of the upper half base and the lower half base, and the positioning pins are provided to ensure the position of the upper half base after disassembly and restoration.

[0009] Furthermore, the positioning pin is a pin with a tapered head and a cylindrical body, and is interference fit with the opening of the positioning pin.

[0010] Furthermore, the bottom surface of the upper base and the top surface of the gasket are both machined.

[0011] The present invention also discloses a method for installing the above-mentioned detachable marine main engine intermediate bearing seat, comprising the following steps:

[0012] S1. After the upper and lower machine bases are manufactured in the workshop, the contact surfaces of the upper and lower machine bases should be polished, and the bolt holes and locating pin holes should be drilled. (Note that the locating pin holes of the lower machine base are only drilled, and the holes should be reamed after the base is installed in the cabin to ensure the accuracy of the locating pins).

[0013] S2. Connect the upper and lower machine bases with bolts, tighten the nuts, and then weld the whole to the hull structure. Use as little current as possible to reduce the impact of welding on the deformation of the base and reduce the workload of subsequent work.

[0014] S3. Disassemble the upper base. Since the upper base is not welded, it will not be deformed by heat. You only need to grind the gasket of the lower base to adjust the levelness.

[0015] S4. After all adjustments are completed, the hole for the positioning pin is reamed and the positioning pin is inserted.

[0016] S5. Install the wedge of the stop block.

[0017] Compared with the prior art, the present invention has the following advantages: the present invention does not adopt the method of synchronously hoisting the shaft generator and the main shaft, and the shaft generator and the main shaft are moved from the rear to the front. Only one device is hoisted at a time, rather than two devices being hoisted synchronously, the accuracy is easy to control, and the installation risk is greatly reduced. In addition, when the shaft needs to be dismantled during the operation of the ship, there is no need to hoist the generator and the main shaft synchronously. The upper base can be dismantled, and then the upper base can be installed after hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of installing and disassembling a shaft generator in the prior art.

[0020] Figure 2 This is a schematic diagram of installing a shaft generator according to the present invention.

[0021] Figure 3 It is a schematic diagram of the specific structure of the present invention.

[0022] In the figure: 1. Upper machine base; 2. Lower machine base; 3. Bolts; 4. Gaskets; 5. Stop blocks; 6. Locating pins; 7. Lifting ears. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] In order to make the purpose, 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 only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0027] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0028] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0029] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0030] like Figure 2 As shown, in order to solve the technical problems existing in the prior art, the present invention does not adopt the method of synchronously hoisting the shaft generator and the main shaft. Since there is a main engine in front, both the shaft generator and the main shaft need to be moved from the back to the front. If the shaft generator is installed first, then the main shaft cannot pass through the shaft generator due to interference from the hoist, so the main shaft can only be installed first, and then the shaft generator is installed through the main shaft. The advantage of this is that only one device is hoisted at a time, instead of hoisting two devices simultaneously, the accuracy is easy to control, and the installation risk is greatly reduced. However, a problem is encountered during the installation, that is, when the shaft generator passes through the main shaft, it is blocked by the main shaft bearing base and cannot be installed. The same is true in reverse. When the shipowner needs to remove the shaft during the operation of the ship, the shaft generator is still blocked by the main shaft bearing base and cannot be disassembled.

[0031] For this purpose, take the main shaft bearing base of a 16K TEU container ship of a shipyard as an example. Figure 3 As shown, the embodiment of the present invention discloses a detachable main engine intermediate bearing base for a ship, comprising an upper base 1 and a lower base 2, the upper base and the lower base being connected by bolts 3, a gasket 4 being arranged on the lower base, and a plurality of stop blocks 5 being arranged on the top surface of the lower base, the stop blocks encircling the upper base to prevent it from moving in the front, back, left and right directions. Specifically, the gasket is welded at the top surface (AA) of the lower base,

[0032] Furthermore, a lifting lug 7 is provided at the top of the upper machine base to facilitate the disassembly of the upper base.

[0033] Furthermore, the upper and lower machine bases are each in two sets, the number of the stop blocks is 8, and each set of the lower machine base is provided with four, including one in front of the lower machine base, one in the rear, and two on the outside of the lower machine base.

[0034] Because the spindle is a rotating body, it normally rotates rapidly. If the rigidity is insufficient or the precision is not achieved, that is, the deformation is large, the spindle will vibrate violently and be damaged. Furthermore, positioning pin holes are provided at the corresponding positions of the upper and lower machine bases. By providing positioning pins 6, the position of the upper base after disassembly and reset is ensured. The problems of high reset installation requirements, high precision requirements, and high rigidity requirements are solved.

[0035] Furthermore, the positioning pin is a pin with a tapered head and a cylindrical body, and is interference fit with the opening of the positioning pin.

[0036] Furthermore, the bottom surface of the upper base and the top surface of the gasket are machined (shaded part) to ensure the contact area to better transmit the vertical load and to accurately adjust the levelness by grinding the gasket.

[0037] The present invention also discloses a method for installing the above-mentioned detachable marine main engine intermediate bearing seat, comprising the following steps:

[0038] S1. After the upper and lower machine bases are manufactured in the workshop, the contact surfaces of the upper and lower machine bases should be polished, and the bolt holes and locating pin holes should be drilled. (Note that the locating pin holes of the lower machine base are only drilled, and the holes should be reamed after the base is installed in the cabin to ensure the accuracy of the locating pins).

[0039] S2. Connect the upper and lower machine bases with bolts, tighten the nuts, and then weld the whole to the hull structure. Use as little current as possible to reduce the impact of welding on the deformation of the base and reduce the workload of subsequent work.

[0040] S3. Disassemble the upper base. Since the upper base is not welded, it will not be deformed by heat. You only need to grind the gasket of the lower base to adjust the levelness.

[0041] S4. After all adjustments are completed, the hole for the positioning pin is reamed and the positioning pin is inserted.

[0042] S5. Install the wedge of the stop block.

[0043] In addition, for the split base connected by bolts, it is also necessary to calculate whether it can meet the strength and stiffness requirements of the one-piece base. The stiffness requirements can be calculated in units by the finite element method, and its natural frequency can also be calculated. Note that the gasket part needs to be modeled with a solid model, and the other parts can be modeled with a shell model. Through calculation, the split base connected by bolts is very close to the one-piece base in terms of strength and stiffness, including vibration, when the number of bolts is sufficient, and meets the use requirements.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detachable main engine intermediate bearing base for a ship, characterized in that: The machine comprises an upper machine base and a lower machine base, wherein the upper machine base and the lower machine base are connected by bolts, a gasket is arranged on the lower machine base, and a plurality of stop blocks are arranged on the top surface of the lower machine base, and the upper machine base is surrounded by the stop blocks.

2. The detachable main engine intermediate bearing base for a ship according to claim 1, characterized in that: The top of the upper machine base is provided with a lifting lug.

3. The detachable main engine intermediate bearing seat for a ship according to claim 1, characterized in that: The upper and lower machine bases are each provided with two sets, and the number of the stop blocks is 8, with four stop blocks provided in each set of the lower machine base, including one provided in front of the lower machine base, one provided in the rear, and two provided on the outside of the lower machine base.

4. The detachable main engine intermediate bearing seat for a ship according to claim 1, characterized in that: Positioning pin holes are also provided at corresponding positions of the upper half base and the lower half base, and the positioning pins are provided to ensure the position of the upper half base after disassembly and resetting.

5. The detachable main engine intermediate bearing seat for a ship according to claim 1, characterized in that: The positioning pin is a pin with a conical head and a cylindrical body, and is interference-fitted with the opening of the positioning pin.

6. The detachable main engine intermediate bearing seat for a ship according to claim 1, characterized in that: The bottom surface of the upper base and the top surface of the spacer are machined.

7. A method for installing a detachable marine main engine intermediate bearing seat as claimed in any one of claims 1 to 6, characterized in that: The steps include: S1. After the upper and lower machine bases are manufactured in the workshop, the contact surfaces of the upper and lower machine bases are polished, and the bolt holes and positioning pin holes are drilled. The positioning pin holes of the lower machine base are only drilled, and the holes need to be reamed after the base is installed in the cabin to ensure the accuracy of the positioning pins; S2. Connect the upper and lower machine bases with bolts, tighten the nuts, and then weld the whole to the hull structure; S3. Disassemble the upper base. Since the upper base is not welded, it will not be deformed by heat. You only need to grind the gasket of the lower base to adjust the levelness. S4. After all adjustments are completed, the hole of the positioning pin is reamed and the positioning pin is inserted; S5. Install the wedge of the stop block.

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