Magnetic type detection method and device for ship shafting flange offset and tortuosity value

Abstract

The invention discloses a ship shafting flange offset and tortuosity value magnetic type detection method and device, and the method comprises the steps: arranging two magnetic adjustment assemblies and two dial indicators on a support, and then fixing the device at an upper detection position, a lower detection position, a left detection position and a right detection position of two opposite middle shaft flanges; at each detection position, the two magnetic suction adjusting assemblies are respectively adsorbed on the outer circumferential surface and the flange surface of one shaft flange, and pointers of the two dial indicators respectively and vertically point to the outer circumferential surface and the flange surface of the other shaft flange; and the centering offset and the centering zigzag value of the shafting flange are calculated according to the reading changes of the two dial indicators at the four detection positions, so that the centering precision of the shafting flange is quickly obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a magnetic suction detection method and device for detecting offset and tortuosity values ​​of a ship shafting flange. Background Art

[0002] During the shipbuilding phase, the shaft flanges are inspected for warp and offset before installation. To inspect the shaft flange warp and offset, the flanges are first placed in the proper position as required, and then the shaft connecting bolts are installed to connect the two opposing flanges together. Since the stern and intermediate shafts are typically immobile during shaft alignment, a feeler gauge is typically used to inspect the shaft flange warp and offset. However, classification societies sometimes do not accept the use of feeler gauges as a measuring tool. If a dial indicator is used as a measuring tool, it must be mounted on a rotatable shaft. However, since neither the intermediate nor the stern shafts can rotate, a dial indicator cannot be used to measure the flange alignment accuracy between different intermediate shafts or between the intermediate and stern shafts. Summary of the Invention

[0003] In view of this, the present invention provides a magnetic detection method and device for the offset and tortuosity of ship shafting flanges, which is used to solve the problem that in the prior art, only feeler gauges can be used to measure the flange alignment accuracy between different central shafts or intermediate shafts and the stern shaft, which cannot meet the relevant measurement requirements of classification societies.

[0004] A magnetic detection method for flange offset and tortuosity of a ship shaft system, comprising the following steps:

[0005] S1, install the magnetic shaft flange alignment detection device directly above the two opposite shaft flanges;

[0006] The magnetic shaft flange alignment detection device includes a bracket arranged along the axial direction of the shaft system and spanning two opposite shaft flanges, a first magnetic adjustment component and a second magnetic adjustment component provided on the bracket, a first dial indicator provided on the bracket for measuring the alignment tortuosity between the two shaft flanges, and a second dial indicator provided on the bracket for measuring the alignment offset between the two shaft flanges, the first magnetic adjustment component and the second magnetic adjustment component are respectively adsorbed on the outer circumferential surface and the flange surface of the first shaft flange, the pointer of the first dial indicator points vertically to the outer circumferential surface of the second shaft flange, and the pointer of the second dial indicator points vertically to the flange surface of the second shaft flange;

[0007] S2, adjust the first dial indicator and the second dial indicator to adjust their respective pointer readings to zero;

[0008] S3, respectively installing the magnetic shaft flange alignment detection device at three detection positions, namely, directly below, to the left, and to the right of two opposite shaft flanges, and reading the pointer readings of the first dial indicator and the second dial indicator at these three detection positions respectively;

[0009] S4, determining whether the difference between the reading of the first dial indicator at the detection position directly below and the SAG value, and the difference between the reading of the first dial indicator at the detection position on the left and the reading on the detection position on the right are both within the allowable error range. If both are within the allowable error range, it indicates that the centering offset of the two shaft flanges meets the requirements;

[0010] Determine whether the difference between the reading of the second dial indicator at the detection position directly below and the GAP value, and the difference between the reading of the second dial indicator at the detection position on the left and the reading at the detection position on the right are both within the allowable error range. If both are within the allowable error range, it means that the centering deflection values ​​of the two shaft flanges meet the requirements.

[0011] Preferably, the specific steps of installing the magnetic shaft flange alignment detection device directly above the two opposite shaft flanges in step S1 are:

[0012] First, assemble the first magnetic adjustment component, the second magnetic adjustment component, the first dial indicator, and the second dial indicator onto the bracket;

[0013] Then, the bracket is placed across the first shaft flange and the second shaft flange in the axial direction of the shaft system;

[0014] Then, adjust the first magnetic adjustment component and lock the first magnetic adjustment component when the pointer of the first dial indicator contacts the outer circumferential surface of the second shaft flange; at the same time, adjust the second magnetic adjustment component and lock the second magnetic adjustment component when the pointer of the second dial indicator contacts the flange surface of the second shaft flange.

[0015] Preferably, the first magnetic adjustment component and the second magnetic adjustment component have the same structure, both including an adjusting bolt, an adjusting nut, a fixing nut, a magnet and a fastening screw. The adjusting nut is screwed onto the adjusting bolt, and the fixing nut is welded and fixed to the outer surface of the bracket. The screw of the adjusting bolt passes through the fixing nut and is fixed to the magnet by the fastening screw, and the magnet is located on the inner side of the bracket.

[0016] Preferably, a groove is provided at the center of a side surface of the magnet facing the shaft flange, a first threaded hole connected to the groove is provided through the center of the magnet, a second threaded hole is provided at the end of the screw of the adjusting bolt along its axial direction, and the fastening screw is screwed into the first threaded hole and the second threaded hole in sequence with its head hidden in the groove.

[0017] Preferably, the first dial indicator and the second dial indicator are both fixed on the bracket via a circular ring.

[0018] Preferably, the bracket is a U-shaped frame.

[0019] Preferably, the SAG value refers to the maximum radial deviation value allowed when two shaft flanges are aligned;

[0020] The GAP value refers to the maximum axial angular deviation allowed when two shaft flanges are aligned.

[0021] A magnetic detection device for the offset and tortuosity of a ship shafting flange comprises a bracket arranged axially along the shafting and spanning two opposite shaft flanges, a first magnetic adjustment component and a second magnetic adjustment component arranged on the bracket, a first dial indicator arranged on the bracket for measuring the centering tortuosity between the two shaft flanges, and a second dial indicator arranged on the bracket for measuring the centering offset between the two shaft flanges, wherein the first magnetic adjustment component and the second magnetic adjustment component are respectively adsorbed on the outer circumferential surface and the flange surface of the first shaft flange, the pointer of the first dial indicator points vertically to the outer circumferential surface of the second shaft flange, and the pointer of the second dial indicator points vertically to the flange surface of the second shaft flange.

[0022] Preferably, the first magnetic adjustment assembly and the second magnetic adjustment assembly have the same structure, and both include an adjusting bolt, an adjusting nut, a fixing nut, a magnet, and a fastening screw. The adjusting nut is screwed onto the adjusting bolt, and the fixing nut is welded and fixed to the outer surface of the bracket. The screw of the adjusting bolt passes through the fixing nut, and a second threaded hole is opened at the end of the screw along its axial direction.

[0023] A groove is provided at the center of a side surface of the magnet facing the shaft flange, and a first threaded hole connected to the groove is provided through the center of the magnet. The fastening screw is screwed into the first threaded hole and the second threaded hole in sequence with its head hidden in the groove to lock the magnet and the adjusting bolt.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention arranges two magnetic adjustment components and two dial indicators on a bracket, and then fixes the devices at four detection positions, namely, upper, lower, left, and right, of two relative central shaft flanges. At each detection position, the two magnetic adjustment components are respectively adsorbed on the outer circumferential surface and flange surface of one of the shaft flanges, and the pointers of the two dial indicators point vertically to the outer circumferential surface and flange surface of the other shaft flange. The reading changes of the two dial indicators at the four detection positions are used to calculate the centering offset and centering tortuosity value of the shaft flange, thereby quickly obtaining the centering accuracy of the shaft flange.

[0026] 2. The present invention only requires the magnetic shaft flange alignment detection device to be adsorbed and fixed on the relative shaft flange. When measuring the shaft flange alignment accuracy, it is only necessary to adjust the installation position of the device on the shaft flange. The operation is simple and convenient, which greatly improves the measurement efficiency of the shaft flange alignment accuracy detection. The magnetic shaft flange alignment detection device has a simple structure and is easy to install and use. The device is reusable and will not cause damage to the structure of the shaft flange during measurement. At the same time, it can also reduce the detection cost of the shaft flange alignment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a structural diagram of a magnetic shaft flange alignment detection device.

[0029] Figure 2 It is a top view of the magnetic shaft flange alignment detection device.

[0030] Figure 3 This is a schematic diagram of the four detection positions of the magnetic shaft flange alignment detection device on the alignment flange.

[0031] Figure 4 It is a schematic diagram of the misalignment between the two shaft flanges.

[0032] The meanings of the numbers in the figure are:

[0033] 1 is a bracket,

[0034] 2 is the first magnetic adjustment component,

[0035] 3 is the second magnetic adjustment component,

[0036] 4 is the first percentage indicator,

[0037] 5 is the second dial indicator,

[0038] 6 is the first shaft flange,

[0039] 7 is the second shaft flange,

[0040] 8 is the adjusting bolt,

[0041] 9 is the adjusting nut,

[0042] 10 is a fixing nut,

[0043] 11 is a magnet,

[0044] 12 is the fastening screw,

[0045] 13 is a torus. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0047] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0048] It should be understood that although the terms first, second, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be understood to indicate or imply relative importance. These terms are only used to distinguish information of the same type from each other. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information without departing from the scope of this disclosure. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0049] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0050] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal communication between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0051] In order to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0052] The present invention provides a magnetic suction detection method for the offset and tortuosity of a ship shafting flange, which specifically comprises the following steps:

[0053] S1. Install the magnetic shaft flange alignment detection device directly above the two opposite shaft flanges.

[0054] The magnetic shaft flange alignment detection device includes a bracket 1 arranged along the shaft axis and spanning two opposite shaft flanges, a first magnetic adjustment component 2 and a second magnetic adjustment component 3 arranged on the bracket 1, a first dial indicator 4 arranged on the bracket 1 for measuring the alignment tortuosity between the two shaft flanges, and a second dial indicator 5 arranged on the bracket 1 for measuring the alignment offset between the two shaft flanges. The first magnetic adjustment component 2 and the second magnetic adjustment component 3 are respectively adsorbed on the outer circumferential surface and flange surface of the first shaft flange 6, the pointer of the first dial indicator 4 points vertically to the outer circumferential surface of the second shaft flange 7, and the pointer of the second dial indicator 5 points vertically to the flange surface of the second shaft flange 7.

[0055] The first magnetic adjustment component can adjust the installation position of the entire detection device on the centering flange in the left and right directions, and the second magnetic adjustment component can adjust the radial position of the entire detection device on the centering flange.

[0056] The first magnetic adjustment component and the second magnetic adjustment component have the same structure, both including an adjusting bolt 8, an adjusting nut 9, a fixing nut 10, a magnet 11 and a fastening screw 12. The adjusting nut 9 is screwed onto the adjusting bolt 8, and the fixing nut 10 is welded and fixed to the outer surface of the bracket 1. The screw of the adjusting bolt 8 passes through the fixing nut 10 and is fixed to the magnet 11 through the fastening screw 12. The magnet 11 is located on the inner side of the bracket 1.

[0057] A groove is provided at the center of the side surface of the magnet 11 facing the shaft flange. A first threaded hole connected to the groove is provided through the center of the magnet 11. A second threaded hole is provided at the end of the screw of the adjusting bolt 8 along its axial direction. The fastening screw 12 is screwed into the first threaded hole and the second threaded hole in sequence with its head hidden in the groove.

[0058] The first dial indicator 4 and the second dial indicator 5 are both fixed to the bracket 1 via a circular ring 13. The circular ring 13 is welded to the outer surface of the bracket 1 and has a threaded hole formed in its radial direction. The dial indicator needle is passed through the middle ring hole of the circular ring and the bracket 1, and a bolt is installed in the threaded hole of the circular ring 13. The bolt is tightened until its end presses against the needle, thereby firmly fixing the dial indicator to the bracket 1.

[0059] In this embodiment, the bracket 1 is a U-shaped frame.

[0060] When installing the magnetic shaft flange alignment detection device, the following installation steps are specifically included:

[0061] First, assemble the first magnetic adjustment component 2, the second magnetic adjustment component 3, the first dial indicator 4, and the second dial indicator 5 onto the bracket 1. At this time, the first magnetic adjustment component 2, the second magnetic adjustment component 3, the first dial indicator 4, and the second dial indicator 5 are only installed on the bracket 1 and are not locked;

[0062] Then, the bracket 1 is placed across the first shaft flange 6 and the second shaft flange 7 in the axial direction of the shaft system;

[0063] Then, adjust the first magnetic adjustment component 2, and lock the first magnetic adjustment component 2 when the pointer of the first dial indicator 4 contacts the outer circumferential surface of the second shaft flange 7; at the same time, adjust the second magnetic adjustment component 3, and lock the second magnetic adjustment component 3 when the pointer of the second dial indicator 5 contacts the flange surface of the second shaft flange 7.

[0064] S2, adjust the first dial indicator 4 and the second dial indicator 5 to adjust their respective pointer readings to zero;

[0065] S3, respectively installing the magnetic shaft flange alignment detection device at three detection positions, directly below, to the left, and to the right of two opposite shaft flanges, and reading the pointer readings of the first dial indicator 4 and the second dial indicator 5 at these three detection positions respectively;

[0066] S4, determining whether the difference between the reading of the first dial indicator 4 at the detection position directly below and the SAG value, and the difference between the reading of the first dial indicator at the detection position on the left and the reading on the detection position on the right are both within the allowable error range. If both are within the allowable error range, it indicates that the centering offset of the two shaft flanges meets the requirements;

[0067] Determine whether the difference between the reading of the second dial indicator 5 at the detection position directly below and the GAP value, and the difference between the reading of the second dial indicator 5 at the detection position on the left and the reading at the detection position on the right are both within the allowable error range. If both are within the allowable error range, it means that the centering deflection values ​​of the two shaft flanges meet the requirements.

[0068] The SAG value refers to the maximum radial deviation allowed when two shaft flanges are aligned.

[0069] The GAP value refers to the maximum axial angular deviation allowed when two shaft flanges are aligned.

[0070] The present invention also provides a magnetic detection device for the offset and tortuosity of a ship shaft flange, comprising a bracket 1 arranged along the axial direction of the shaft system and spanning two opposite shaft flanges, a first magnetic adjustment component 2 and a second magnetic adjustment component 3 arranged on the bracket 1, a first dial indicator 4 arranged on the bracket 1 for measuring the centering tortuosity between the two shaft flanges, and a second dial indicator 5 arranged on the bracket 1 for measuring the centering offset between the two shaft flanges, wherein the first magnetic adjustment component 2 and the second magnetic adjustment component 3 are respectively adsorbed on the outer circumferential surface and the flange surface of the first shaft flange 6, the pointer of the first dial indicator 4 points vertically to the outer circumferential surface of the second shaft flange 7, and the pointer of the second dial indicator 5 points vertically to the flange surface of the second shaft flange 7.

[0071] The structures of the first magnetic adjustment component and the second magnetic adjustment component are as described above and will not be described in detail here.

[0072] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Claims

1. A magnetic detection method for flange offset and tortuosity of a ship shaft system, characterized in that: The specific steps include: S1, install the magnetic shaft flange alignment detection device directly above the two opposite shaft flanges; The magnetic-attraction type shaft flange centering detection device comprises a bracket (1) arranged along the shaft axis and spanning two opposite shaft flanges, a first magnetic-attraction adjustment component (2) and a second magnetic-attraction adjustment component (3) arranged on the bracket (1), a first dial indicator (4) arranged on the bracket (1) for measuring the centering deflection between the two shaft flanges, and a second dial indicator (5) arranged on the bracket (1) for measuring the centering offset between the two shaft flanges, wherein the first magnetic-attraction adjustment component (2) and the second magnetic-attraction adjustment component (3) are respectively adsorbed on the outer circumferential surface and the flange surface of the first shaft flange (6), the pointer of the first dial indicator (4) vertically points to the outer circumferential surface of the second shaft flange (7), and the pointer of the second dial indicator (5) vertically points to the flange surface of the second shaft flange (7); S2, adjusting the first dial indicator (4) and the second dial indicator (5) to adjust their respective pointer readings to zero; S3, respectively installing the magnetic shaft flange alignment detection device at three detection positions, namely, directly below, on the left, and on the right of two opposite shaft flanges, and reading the pointer readings of the first dial indicator (4) and the second dial indicator (5) at the three detection positions respectively; S4, judging whether the difference between the reading of the first dial indicator (4) at the detection position directly below and the SAG value, and the difference between the reading of the first dial indicator at the detection position on the left and the reading at the detection position on the right are both within the allowable error range. If both are within the allowable error range, it means that the centering offset of the two shaft flanges meets the requirements; Determine whether the difference between the reading of the second dial indicator (5) at the detection position directly below and the GAP value, and the difference between the reading of the second dial indicator (5) at the detection position on the left and the reading at the detection position on the right are both within the allowable error range. If both are within the allowable error range, it means that the centering deflection values ​​of the two shaft flanges meet the requirements.

2. The magnetic detection method for flange offset and tortuosity of a ship shafting system according to claim 1 is characterized in that: The specific steps of installing the magnetic shaft flange alignment detection device directly above two opposing shaft flanges in step S1 are as follows: First, assemble the first magnetic adjustment component (2), the second magnetic adjustment component (3), the first dial indicator (4) and the second dial indicator (5) onto the bracket (1); Then, the bracket (1) is placed across the first shaft flange (6) and the second shaft flange (7) in the axial direction of the shaft system; Then, the first magnetic adjustment component (2) is adjusted, and the first magnetic adjustment component (2) is locked when the pointer of the first dial indicator (4) contacts the outer circumferential surface of the second shaft flange (7); and the second magnetic adjustment component (3) is adjusted at the same time, and the second magnetic adjustment component (3) is locked when the pointer of the second dial indicator (5) contacts the flange surface of the second shaft flange (7).

3. The magnetic detection method for flange offset and tortuosity of a ship shafting system according to claim 1 or 2, characterized in that: The first magnetic attraction adjustment component and the second magnetic attraction adjustment component have the same structure, both comprising an adjustment bolt (8), an adjustment nut (9), a fixing nut (10), a magnet (11) and a fastening screw (12), wherein the adjustment nut (9) is screwed onto the adjustment bolt (8), the fixing nut (10) is welded and fixed to the outer surface of the bracket (1), the screw of the adjustment bolt (8) passes through the fixing nut (10) and is fixed to the magnet (11) through the fastening screw (12), and the magnet (11) is located on the inner side of the bracket (1).

4. The magnetic detection method for flange offset and tortuosity of a ship shafting system according to claim 3 is characterized in that: A groove is provided at the center of a side surface of the magnet (11) facing the shaft flange, a first threaded hole connected to the groove is provided through the center of the magnet (11), a second threaded hole is provided at the end of the screw of the adjusting bolt (8) along its axial direction, and the fastening screw (12) is screwed into the first threaded hole and the second threaded hole in sequence with its head hidden in the groove.

5. The magnetic detection method for flange offset and tortuosity of a ship shafting system according to claim 1, characterized in that: The first dial indicator (4) and the second dial indicator (5) are both fixed on the bracket (1) via a circular ring (13).

6. The magnetic detection method for flange offset and tortuosity of a ship shafting system according to claim 1, characterized in that: The bracket (1) is a U-shaped frame.

7. The magnetic detection method for flange offset and tortuosity of a ship shafting system according to claim 1, characterized in that: The SAG value refers to the maximum radial deviation allowed when two shaft flanges are aligned; The GAP value refers to the maximum axial angular deviation allowed when two shaft flanges are aligned.

8. A magnetic detection device for flange offset and tortuosity of a ship shaft system, characterized in that: The invention comprises a bracket (1) arranged along the axial direction of the shaft system and spanning two opposite shaft flanges, a first magnetic adjustment component (2) and a second magnetic adjustment component (3) arranged on the bracket (1), a first dial indicator (4) arranged on the bracket (1) for measuring the centering deflection between the two shaft flanges, and a second dial indicator (5) arranged on the bracket (1) for measuring the centering offset between the two shaft flanges, wherein the first magnetic adjustment component (2) and the second magnetic adjustment component (3) are respectively adsorbed on the outer circumferential surface and the flange surface of the first shaft flange (6), the pointer of the first dial indicator (4) vertically points to the outer circumferential surface of the second shaft flange (7), and the pointer of the second dial indicator (5) vertically points to the flange surface of the second shaft flange (7).

9. The magnetic detection device for flange offset and tortuosity of a ship shaft system according to claim 8, characterized in that: The first magnetic attraction adjustment component and the second magnetic attraction adjustment component have the same structure, and both include an adjustment bolt (8), an adjustment nut (9), a fixing nut (10), a magnet (11) and a fastening screw (12). The adjustment nut is screwed onto the adjustment bolt (8), and the fixing nut (10) is welded and fixed to the outer surface of the bracket (1). The screw of the adjustment bolt (8) passes through the fixing nut (10) and a second threaded hole is opened at the end of the screw along its axial direction. A groove is provided at the center of a side surface of the magnet (11) facing the shaft flange, and a first threaded hole connected to the groove is provided through the center of the magnet (11). A fastening screw (12) is screwed into the first threaded hole and the second threaded hole in sequence and its head is hidden in the groove to lock and fix the magnet (11) and the adjusting bolt (8).

Images