A marine engine centering device

Abstract

The utility model discloses a kind of ship engine centering device, including bottom plate, dial gauge and multiple adjusting groups, adjusting group includes multiple adjusting components and multiple sliding members, multiple sliding members are respectively set on bottom plate by multiple adjusting components, adjusting component is used to adjust the spacing of sliding member and bottom plate, so that multiple sliding members are all resisted on the inner wall of main bearing hole of engine bed, bottom plate is slid along the inner wall circumferential of main bearing hole of engine bed on the inner wall of main bearing hole of engine bed by multiple sliding members;Dial gauge is connected on bottom plate by magnetic force table seat, the hand of dial gauge is used to resist on the inner wall of through hole. Centering device is convenient for detecting the coaxiality of main bearing hole of engine bed and through hole, in the process of installing axial damper / barrier oil plate, auxiliary positioning axial damper / barrier oil plate, without using other auxiliary equipment to complete the detection of coaxiality, the space occupied is also smaller, the structure of centering device is relatively simple, and it is convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of marine technology, and in particular to a ship engine centering device. Background Technology

[0002] Most ship engines are low-speed diesel engines. These engines are relatively large, and during assembly, maintenance, and testing, it is crucial to ensure the coaxiality of the engine block main bearing and the axial damper / oil baffle. Large deviations in coaxiality can lead to significant oil leakage, and in severe cases, can even affect the damper's performance or interfere with the crankshaft, damaging it. When installing the axial damper / oil baffle, it is necessary to simultaneously measure the coaxiality of the engine block main bearing bore and the through hole on the axial damper / oil baffle, while simultaneously adjusting the position of the axial damper / oil baffle to ensure the required coaxiality. Only after this coaxiality is met can the axial damper / oil baffle be fixed. This process is also called alignment. Currently, due to the large size of the engine block main bearing bore and the through hole, large and complex specialized coaxiality measuring equipment is typically used. This requires numerous auxiliary equipment, involves complex operation methods, occupies a large space, and has low efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a ship engine alignment device that facilitates the detection of the coaxiality of the main bearing hole and the through hole in the engine base, and has a relatively simple structure and is easy to operate.

[0004] A ship engine centering device according to an embodiment of the present invention includes a base plate, a dial indicator, and multiple adjustment groups. Each adjustment group includes multiple adjustment components and multiple sliding members. The sliding members are respectively mounted on the base plate via the multiple adjustment components. The adjustment components are used to adjust the distance between the sliding members and the base plate, so that all the sliding members abut against the inner wall of the main bearing hole of the engine base. The base plate slides circumferentially along the inner wall of the main bearing hole of the engine base via the multiple sliding members. The dial indicator is connected to the base plate via a magnetic base, and the dial indicator needle abuts against the inner wall of a through hole.

[0005] It has at least the following beneficial effects: When installing the axial damper / oil baffle, the axial damper / oil baffle is first initially positioned on the machine base near the main bearing hole of the machine base, and multiple sliding parts are respectively mounted on the base plate through multiple adjusting components. Then, the base plate is placed in the main bearing hole of the machine base and the sliding parts are pressed against the inner wall of the main bearing hole of the machine base. The distance between the sliding parts and the base plate is adjusted by the adjusting components so that multiple sliding parts are pressed against the inner wall of the main bearing hole of the machine base. At this time, the base plate can move along the inner wall of the main bearing hole of the machine base through the multiple sliding parts. The dial indicator slides circumferentially along the inner wall of the machine base. A magnetic base is then used to mount the dial indicator on the base plate. The position of the dial indicator is adjusted so that its needle rests against the inner wall of the through hole. Finally, the base plate is driven to slide circumferentially along the inner wall of the main bearing hole of the machine base. The base plate carries the dial indicator circumferentially along the inner wall of the main bearing hole. By reading the dial indicator in real time, the offset direction of the axial damper / oil baffle on the machine base can be determined. The position of the axial damper / oil baffle is adjusted accordingly until the coaxiality of the main bearing hole and the through hole meets the requirements. Finally, the machine base and the axial damper / oil baffle are fixed relative to each other. This alignment device facilitates the detection of the coaxiality of the main bearing hole and the through hole. During the installation of the axial damper / oil baffle, it assists in positioning the axial damper / oil baffle, eliminating the need for other auxiliary equipment to complete the coaxiality detection. It also occupies less space. The alignment device has a simple structure and is easy to operate.

[0006] According to some embodiments of the present invention, the adjusting assembly further includes a locking nut, the adjusting component is a bolt, the bolt is threadedly connected to the base plate, the threaded end of the bolt is threadedly connected to the sliding member, the bolt is threadedly connected to the locking nut, and the locking nut is used to abut against the base plate to fix the bolt on the base plate.

[0007] According to some embodiments of the present invention, a top plate is also included, which is disposed on the bottom plate. The magnetic gauge base is connected to the bottom plate through the top plate. There is a gap between the top plate and the bottom plate so that an operating space for the operating wrench is formed between the dial indicator and the adjustment group.

[0008] According to some embodiments of the present invention, the base plate is connected to the top plate by a plurality of screws, and a plurality of spacer sleeves are provided between the top plate and the base plate to limit the size of the gap between the top plate and the base plate.

[0009] According to some embodiments of the present invention, each of the sliding members is provided with a spherical surface, which is used to abut against the inner wall of the main bearing hole of the machine base.

[0010] According to some embodiments of this utility model, the sliding member is made of brass.

[0011] According to some embodiments of the present invention, a positioning plate is also included. The positioning plate is connected to the base plate and is perpendicular to the base plate. The positioning plate is used to abut against the end face of the peripheral wall of the main bearing hole of the machine base, so that the plane of the sliding trajectory of the base plate / the pointer is perpendicular to the axial direction of the main bearing hole of the machine base.

[0012] According to some embodiments of this utility model, the positioning plate and the base plate are made of aluminum alloy.

[0013] According to some embodiments of the present invention, the number of adjustment components is three sets, and the three sets of adjustment components are distributed in a triangular pattern on the base plate.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a partial structural diagram of the main bearing hole of the engine base, a partial through hole, and the centering device of a marine engine, according to an embodiment of this utility model. Figure 2 This is one of the structural schematic diagrams of the ship engine centering device according to an embodiment of the present utility model; Figure 3 This is the second structural schematic diagram of the ship engine centering device according to an embodiment of the present utility model; Figure 4 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 5 This is a front view structural diagram of an embodiment of the present utility model; Icon labels: Machine base main bearing hole 1; Through hole 2; Base plate 3, screw 31, spacer sleeve 32; Adjustment group 4, adjustment assembly 41, sliding component 42, locking nut 43; Percentage Table 5; Magnetic base 6; Top plate 7; Positioning plate 8. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0018] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0019] Reference Figures 1 to 3 This utility model discloses a ship engine centering device, including a base plate 3, a dial indicator 5, and multiple adjustment groups 4. The adjustment group 4 includes multiple adjustment components 41 and multiple sliding parts 42. The multiple sliding parts 42 are respectively disposed on the base plate 3 through the multiple adjustment components 41. The adjustment components 41 are used to adjust the distance between the sliding parts 42 and the base plate 3 so that the multiple sliding parts 42 all abut against the inner wall of the main bearing hole 1 of the engine base. The base plate 3 slides circumferentially along the inner wall of the main bearing hole 1 of the engine base through the multiple sliding parts 42. The dial indicator 5 is connected to the base plate 3 through a magnetic base 6, and the needle of the dial indicator 5 is used to abut against the inner wall of the through hole 2.

[0020] When installing the axial vibration damper / oil baffle, first position the axial vibration damper / oil baffle on the machine base near the main bearing hole 1 of the machine base. Multiple sliding components 42 are respectively mounted on the base plate 3 via multiple adjusting components 41. Then, place the base plate 3 inside the main bearing hole 1 of the machine base and abut the sliding components 42 against the inner wall of the main bearing hole 1. Adjust the distance between the sliding components 42 and the base plate 3 using the adjusting components 41, so that all sliding components 42 abut against the inner wall of the main bearing hole 1. At this time, the base plate 3 can slide circumferentially along the inner wall of the main bearing hole 1 of the machine base via the multiple sliding components 42. Next, the dial indicator 5 is placed on the base plate 3 using the magnetic base 6. The position of the dial indicator 5 is adjusted so that the needle of the dial indicator 5 is against the inner wall of the through hole 2. Finally, the base plate 3 is driven to slide circumferentially along the inner wall of the main bearing hole 1 of the machine base. The base plate 3 carries the dial indicator 5 and slides circumferentially along the inner wall of the main bearing hole 1 of the machine base. By reading the dial indicator 5 in real time, the offset direction of the axial damper / oil baffle on the machine base can be determined. The position of the axial damper / oil baffle is adjusted accordingly until the coaxiality of the main bearing hole 1 and the through hole 2 of the machine base meets the requirements. Finally, the machine base and the axial damper / oil baffle are fixed relative to each other.

[0021] The alignment device facilitates the detection of the coaxiality of the main bearing hole 1 and the through hole 2 of the machine base. During the installation of the axial damper / oil baffle, it assists in positioning the axial damper / oil baffle, eliminating the need for other auxiliary equipment to complete the coaxiality detection. It also occupies less space. The alignment device has a simple structure and is easy to operate.

[0022] It is conceivable that multiple sliding parts 42 are located on the same arc surface, and the radius of the arc surface is equal to the radius of the main bearing hole 1 of the machine base. This allows the base plate 3 to carry the dial indicator 5 and slide smoothly along the inner wall of the main bearing hole 1 of the machine base. When multiple sliding parts 42 are all against the inner wall of the main bearing hole 1 of the machine base, the arc surface formed by the positions of the multiple sliding parts 42 has a bisector. The bisector divides the arc surface into two equal parts, and the bisector is parallel to the axis of the main bearing hole 1 of the machine base. The circle corresponding to the arc surface has a radius that passes through the bisector. Before the pointer of the dial indicator 5 is against the inner wall of the through hole 2, the position and orientation of the dial indicator 5 are adjusted by the magnetic base 6 so that the pointer is parallel to the radius that passes through the bisector. The straight line where the pointer is located intersects the bisector. When the pointer is against the inner wall of the through hole 2, the tangent line corresponding to the point of contact between the pointer and the through hole 2 is perpendicular to the pointer.

[0023] The magnetic base 6 can be quickly and easily connected to the base plate 3 and quickly and easily removed from the base plate 3, enabling quick and easy installation and removal of the dial indicator 5. The magnetic base 6 has a universal connecting arm, on which the dial indicator 5 is mounted. The universal connecting arm can easily adjust the position and orientation of the dial indicator 5.

[0024] In some of these embodiments, reference is made to Figures 2 to 5 In any of the accompanying drawings, the adjusting assembly 4 also includes a locking nut 43, and the adjusting component 41 is a bolt. The bolt is threadedly connected to the base plate 3, and the threaded end of the bolt is threadedly connected to the sliding member 42. Rotating / tightening the bolt can adjust the distance between the sliding member 42 and the base plate 3. The threaded end of the bolt is threadedly connected to the sliding member 42, which allows for a detachable connection between the sliding member 42 and the bolt, so as to replace the sliding member 42 and adjust the position of the sliding member 42 on the bolt, thereby achieving fine adjustment of the distance between the sliding member 42 and the base plate 3.

[0025] The bolt is threadedly connected to the locking nut 43. The locking nut 43 is used to press against the base plate 3 to fix the bolt to the base plate 3. When the sliding part 42 presses against the inner wall of the main bearing hole 1 of the machine base, stop turning the bolt and turn the locking nut 43 until the locking nut 43 presses against the base plate 3, thus locking the bolt to the base plate 3.

[0026] It is conceivable that the base plate 3 is provided with a first threaded hole, and the thread in the first threaded hole is opposite in direction to the thread of the locking nut 43. Initially, the locking nut 43 is threadedly connected to the bolt, and the bolt is screwed into the first threaded hole. When adjusting the position of the sliding member 42, the locking nut 43 is rotated to move the locking nut 43 to a region far away from the base plate 3. Then the bolt is turned to adjust the position of the bolt on the base plate 3. The bolt drives the sliding member 42 to move, thereby adjusting the distance between the base plate 3 and the sliding member 42. When all the sliding members 42 are against the inner wall of the main bearing hole 1 of the machine base, the bolt can be stopped from being turned. Instead, the locking nut 43 is turned to move the locking nut 43 towards the base plate 3 and against the base plate 3, thereby locking the bolt on the base plate 3. This ensures that the distance between the sliding member 42 and the base plate 3 remains unchanged, ensuring the stability of the base plate 3 and the dial indicator 5. This is beneficial to improving the efficiency and accuracy of detecting the coaxiality of the main bearing hole 1 and the through hole 2 of the machine base, and the operation method is relatively simple.

[0027] Since tools such as wrenches are needed to tighten bolts and lock nuts 43, dial indicator 5 is connected to base plate 3 via magnetic base 6. In order to avoid dial indicator 5 interfering with wrench or to avoid dial indicator 5 obstructing wrench operation, an operating space for operating wrench needs to be set between dial indicator 5 and adjustment group 4.

[0028] In some embodiments, the centering device further includes a top plate 7, which is disposed on the bottom plate 3. The magnetic gauge base 6 is connected to the bottom plate 3 through the top plate 7. There is a gap between the top plate 7 and the bottom plate 3 so that an operating space for the operating wrench is formed between the dial indicator 5 and the adjustment group 4. The operating space is used for the wrench to rotate the locking nut 43 to reach in so that the operating wrench can tighten the bolt and the locking nut 43. The top plate 7 supports the magnetic gauge base 6, so as to facilitate the tightening of the bolt and the locking nut 43 and avoid setting the size of the bottom plate 3 to be too large so that the bolt and the locking nut 43 are located in an area far away from the magnetic gauge base 6.

[0029] In some of these embodiments, reference is made to Figures 2 to 5 In any of the accompanying drawings, the base plate 3 is connected to the top plate 7 by multiple screws 31, thereby achieving a detachable connection between the base plate 3 and the top plate 7. Multiple spacer sleeves 32 are provided between the top plate 7 and the base plate 3, which separate the top plate 7 and the base plate 3, so that there is a gap between the top plate 7 and the base plate 3. The height of the spacer sleeve 32 limits the size of the gap between the top plate 7 and the base plate 3, and the height of the spacer sleeve 32 is greater than the thickness of tools such as wrenches.

[0030] It is conceivable that, referring to Figure 4 The top plate 7 has a connecting hole, and the bottom plate 3 has a second threaded hole. The threaded section of the screw 31 passes through the connecting hole and is screwed into the second threaded hole. The spacer sleeve 32 is cylindrical or tubular. The spacer sleeve 32 is fitted on the threaded section to position the spacer sleeve 32 and prevent the spacer sleeve 32 from sliding between the top plate 7 and the bottom plate 3 due to the loosening of the screw 31.

[0031] In some of these embodiments, reference is made to Figures 2 to 5 In any of the accompanying drawings, multiple sliding members 42 are provided with spherical surfaces. The spherical surfaces are used to abut against the inner wall of the main bearing hole 1 of the machine base. The spherical surfaces form point contact with the inner wall of the main bearing hole 1 of the machine base, which helps to maintain the stability between the sliding member 42 and the inner wall of the main bearing hole 1 of the machine base, reduces the risk of scratching and abrasion of the inner wall of the main bearing hole 1 of the machine base, and the spherical surfaces are easy to process.

[0032] In some embodiments, the sliding member 42 is made of brass, which gives the sliding member 42 a good elongation and reduces the impact of the sliding member 42 on the inner wall of the main bearing hole 1 of the machine base.

[0033] In some of these embodiments, reference is made to Figures 2 to 5In any of the accompanying drawings, the centering device further includes a positioning plate 8, which is connected to the base plate 3 and is perpendicular to the base plate 3. The positioning plate 8 is used to abut against the end face of the peripheral wall of the main bearing hole 1 of the machine base, so that the plane on which the sliding trajectory of the base plate 3 / the pointer lies is perpendicular to the axial direction of the main bearing hole 1 of the machine base. When the base plate 3 slides circumferentially along the inner wall of the main bearing hole 1 of the machine base via multiple sliding parts 42, the positioning plate 8 abuts against the end face of the peripheral wall of the main bearing hole 1 of the machine base, preventing the entire centering device from moving along the axial direction of the main bearing hole 1 of the machine base, so that the sliding trajectory of the pointer lies on a plane, and the plane on which the sliding trajectory of the pointer lies is perpendicular to the axial direction of the main bearing hole 1 of the machine base. The positioning plate 8 positions the entire centering device, which facilitates driving the centering device to move along a specific trajectory, improving the convenience of operating the centering device and improving the efficiency of detection.

[0034] In some embodiments, the positioning plate 8 and the base plate 3 are made of aluminum alloy, which makes the positioning plate 8 and the base plate 3 lighter. Compared with iron or steel, the positioning plate 8 and the base plate 3 made of aluminum alloy have better performance and reduce the risk of the positioning plate 8 and the base plate 3 scratching and abrading the inner wall of the main bearing hole 1 of the machine base.

[0035] In some of these embodiments, reference is made to Figure 3 or Figure 5 The number of adjustment components 41 is three sets, which are distributed in a triangle on the base plate 3. This improves the stability of the base plate 3 and eliminates the need for additional adjustment components 41, thus simplifying the structure of the centering device, reducing costs, and improving operational convenience and efficiency. Of course, the number of adjustment components 41 can also be greater than or equal to four sets.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A ship engine centering device, characterized in that, include: Base plate; Multiple adjustment groups include multiple adjustment components and multiple sliding members. The multiple sliding members are respectively disposed on the base plate through the multiple adjustment components. The adjustment components are used to adjust the distance between the sliding members and the base plate so that the multiple sliding members abut against the inner wall of the main bearing hole of the machine base. The base plate slides circumferentially along the inner wall of the main bearing hole of the machine base through the multiple sliding members. A dial indicator is connected to the base plate via a magnetic base, and the pointer of the dial indicator is used to press against the inner wall of the through hole.

2. The ship engine centering device according to claim 1, characterized in that, The adjustment assembly also includes a locking nut. The adjustment component is a bolt, which is threaded to the base plate. The threaded end of the bolt is threaded to the sliding member. The bolt is threaded to the locking nut, which is used to press against the base plate to fix the bolt on the base plate.

3. A ship engine centering device according to claim 2, characterized in that, It also includes a top plate, which is disposed on the bottom plate. The magnetic gauge base is connected to the bottom plate through the top plate. There is a gap between the top plate and the bottom plate so that an operating space for the operating wrench is formed between the dial indicator and the adjustment group.

4. A ship engine centering device according to claim 3, characterized in that, The base plate is connected to the top plate by multiple screws, and multiple spacer sleeves are provided between the top plate and the base plate to limit the size of the gap between the top plate and the base plate.

5. A ship engine centering device according to claim 2, characterized in that, Each of the sliding components is provided with a spherical surface, which is used to abut against the inner wall of the main bearing hole of the machine base.

6. A ship engine centering device according to any one of claims 1 to 5, characterized in that, The sliding component is made of brass.

7. A ship engine centering device according to claim 1, characterized in that, It also includes a positioning plate, which is connected to the base plate and is perpendicular to the base plate. The positioning plate is used to abut against the end face of the peripheral wall of the main bearing hole of the machine base, so that the plane of the sliding trajectory of the base plate / the pointer is perpendicular to the axial direction of the main bearing hole of the machine base.

8. A ship engine centering device according to claim 7, characterized in that, The positioning plate and the base plate are made of aluminum alloy.

9. A ship engine centering device according to claim 1, characterized in that, The number of adjustment components is three sets, and the three sets of adjustment components are distributed in a triangle on the base plate.

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