A rudder system bushing clearance measuring device and method with a threaded adjustment rod

Abstract

The present invention discloses a rudder bushing clearance measuring device and method with a threaded adjustment rod, comprising a device body for extending into a hull; an adjustment handle sleeved on one side of the device body; a fastening nut threadedly connected to the device body; and an adjustment rod for inserting into a small hole of the rudder bearing body. According to a rudder bushing clearance measuring device and method with a threaded adjustment rod of the present invention, the rudder bushing clearance is measured by using a rudder bushing clearance measuring device with a threaded adjustment rod, which can avoid workers from entering a small space to work, avoid divers from diving underwater to work, and improve work safety. The device is easy to operate, greatly improves the work efficiency of underwater detection, and the equipment has a simple structure, few components, light weight, and is easy to carry, thereby reducing the cost of the entire set of underwater detection equipment. The device is used for measurement with higher accuracy, reaching an accuracy of 0.01mm, and is easy to operate.

Description

Technical Field

[0001] The invention relates to the field of underwater ship inspection equipment and operation technology, and in particular to a rudder system bushing clearance measuring device and method with a threaded adjustment rod. Background Art

[0002] In the underwater inspection of ships, the measurement of the clearance of the rudder bushing is a very important inspection item. According to the requirements of the classification society, if the rudder bushing is made of non-metallic materials, the clearance between the rudder bushing and the shaft sleeve cannot be less than 1.5mm to ensure that there is still enough rotation clearance between the bushing and the shaft sleeve after the non-metallic material swells in water. The clearance between the rudder bushing and the shaft sleeve cannot be too large, usually controlled within 3mm, to ensure the safe operation of the entire rudder system and the normal operation of the seal.

[0003] Regarding the measurement of rudder bushing clearance, traditional ships with larger tonnage, such as ships above 35,000 tons, usually use a special manhole cover to enter the rudder shaft to measure the bushing clearance. If the rudder pintle bushing is located low and submerged in water, divers need to be arranged to dive underwater for measurement during the underwater inspection.

[0004] The traditional method of measuring the gap is to insert a feeler gauge into the gap between the bushing and the shaft sleeve to measure the gap size. The traditional method is affected by the measurement position, the measurement accuracy is poor, and it is impossible to accurately judge the wear condition of the main force-bearing position of the shaft sleeve and bushing. The measurement position is not easy to reach, the measurement accuracy is poor, and the manhole cover needs to be disassembled and installed, which is inconvenient. Summary of the invention

[0005] The present invention aims to at least solve the technical problems existing in the prior art: "the traditional method is affected by the measurement position, the measurement accuracy is poor, the wear condition of the main stress-bearing position of the sleeve and bushing cannot be accurately judged, the measurement position is not easy to reach, the measurement accuracy is poor, and the manhole cover needs to be disassembled and assembled, which is inconvenient." To this end, the present invention proposes a rudder system bushing clearance measurement device and method with a threaded adjustment rod, which improves the safety of the operation of the ship's rudder system equipment, improves the convenience of daily maintenance, reduces the cost of the entire set of rudder system equipment, and reduces the workload of the staff.

[0006] According to some embodiments of the present invention, a rudder bushing gap measuring device with a threaded adjusting rod includes a device body, which is used to extend into a hull; an adjusting handle, which is threadedly connected to the device body and is covered on one side of the device body; a fastening nut, which is threadedly connected to the device body and sleeved on the device body and is located on one side of the adjusting handle; an adjusting rod, which is connected to one end of the device body and is used to be inserted into a small hole in the rudder bearing body; wherein a threaded hole is provided at one end of the device body away from the adjusting handle, and the adjusting rod is detachably threadedly connected to the thread of the device body.

[0007] According to some embodiments of the present invention, the device body includes an extension portion, a threaded portion and a contact portion, the two sides of the threaded portion are respectively connected to the extension portion and the contact portion, the diameter of the contact portion is larger than the threaded portion, and the diameter of the threaded portion is larger than the extension portion; a threaded hole is provided at the end of the extension portion for connecting with the adjusting rod; a thread is provided on the surface of the threaded portion for threaded connection with the adjusting handle; and a pattern is rolled on the surface of the contact portion.

[0008] According to some embodiments of the present invention, the adjusting rod includes an abutment portion, a gripping portion and a connecting portion, the two sides of the gripping portion are respectively connected to the abutment portion and the connecting portion, the diameter of the gripping portion is larger than the diameter of the abutment portion, and the diameter of the connecting portion is equal to the inner diameter of the threaded hole of the extension portion of the device body; the surface of the connecting portion is provided with a thread, and the connecting portion is threadedly connected to the threaded hole of the extension portion; the surface of the gripping portion is rolled with a pattern.

[0009] According to some embodiments of the present invention, the adjusting rod includes an 8mm adjusting rod and a 10mm adjusting rod, the 8mm adjusting rod is used to be inserted into the small hole of the rudder bearing body to facilitate the measurement of the bushing gap, and the 10mm adjusting rod is used to measure the distance from the rudder shaft sleeve to the false rudder outer plate and the distance from the rudder bearing body to the false rudder outer plate.

[0010] According to some embodiments of the present invention, the inner diameter of the adjustment handle is equal to the diameter of the threaded portion of the device body, the inner wall of the adjustment handle is provided with threads, and the adjustment handle is threadedly connected to the threaded portion; the surface of the threaded handle is rolled with patterns.

[0011] According to some embodiments of the present invention, an inner diameter of the fastening nut is equal to an inner diameter of the adjusting handle, and the fastening nut is threadedly connected to the threaded portion.

[0012] According to some embodiments of the present invention, the device body, the adjustment handle, the adjustment rod and the fastening nut are all made of round steel, and anti-rust oil is sprayed on the surface.

[0013] According to some embodiments of the present invention, a method for measuring the clearance of a rudder bushing with a threaded adjustment rod comprises the device body, the adjustment handle, the fastening nut, the 8mm adjustment rod and the 10mm adjustment rod, and also comprises a vernier caliper and a hand chain hoist; the rudder device is kept in a free hovering state; the 10mm adjustment rod is tightened with the device body, and the fastening nut on the device body is loosened; the device body is inserted into the screw plug hole of the outer plate of the false rudder, and the adjustment handle is tightened and abutted against the screw plug hole; the device body is rotated until the device body is tightened and the fastening nut is locked, at which time the 10mm adjustment rod is in contact with the surface of the rudder bearing body; the vernier caliper measures the end surface distance L4 from the end of the fastening nut to the contact portion of the device body; The distance A from the rudder bearing body to the fake rudder outer plate = the length of the holding part of the 10mm adjusting rod + the length of the device body - (the length of the adjusting handle + the length of the fastening nut + the length of the contact part of the device body + L4); the distance B from the rudder shaft sleeve to the fake rudder outer plate = A + the thickness of the rudder shaft bushing and the rudder bearing body; the measured length value of the device body inserted into the rudder system = the total length after the 8mm adjusting rod is connected to the device body - (the length of the adjusting handle + the length of the fastening nut + the distance between the adjusting handle and the contact part + the length of the contact part of the device body); when the measured value = B±1, the rudder system bushing has not rotated, and when the measured value = A+90±1, the rudder system bushing has rotated, and the ship needs to enter the dock for disassembly and inspection.

[0014] According to some embodiments of the present invention, the rudder system equipment is kept in a free hovering state; the 8mm adjustment rod is tightened with the device body, and the fastening nut on the device body is loosened; the device body is inserted into the screw plug hole of the fake rudder outer plate, and the adjustment handle is tightened and abuts against the screw plug hole; the device body is rotated until the device body is tightened to lock the fastening nut, and at this time the 8mm adjustment rod is in contact with the surface of the rudder shaft sleeve; the vernier caliper measures the end face distance L1 from the end of the fastening nut to the contact part of the device body; the fastening nut is loosened, and the device body is removed.

[0015] According to some embodiments of the present invention, the hand chain hoist tightens the rudder blade to the starboard side of the ship with a tension force of 0.5t; the device body is inserted into the screw plug hole of the dummy rudder outer plate, and the adjustment handle is tightened and abuts against the screw plug hole; the device body is rotated until the device body is tightened to lock the fastening nut, at which time the 8mm adjustment rod contacts the surface of the rudder stock sleeve; the vernier caliper measures the end face distance L2 from the end of the fastening nut to the contact part of the device body, and the rudder stock The starboard clearance of the bushing is G1=L1-L2; the fastening nut is opened and the device body is screwed out counterclockwise; the hand winch tightens the rudder blade to the port side of the ship with a tightening force of 0.5t; the device body is screwed inward clockwise to lock the fastening nut, at which time the 8mm adjustment rod contacts the surface of the rudder stock bushing; the vernier caliper measures the end face distance L3 from the end of the fastening nut to the contact part of the device body, and the port clearance of the rudder stock bushing is G2=L3-G1.

[0016] According to some embodiments of the present invention, a rudder bushing clearance measuring device and method with a threaded adjustment rod have at least the following beneficial effects: by measuring the rudder bushing clearance through the rudder bushing clearance measuring device with a threaded adjustment rod, workers can be prevented from entering a small space to work, and divers can be prevented from diving underwater to work, thereby improving work safety. The device is easy to operate, greatly improving the efficiency of underwater detection, and the equipment has a simple structure, few parts, light weight, and is easy to carry, thereby reducing the cost of the entire set of underwater detection equipment. The device is used for measurement, with higher accuracy, reaching 0.01mm, and simple operation.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of assembling a measuring device according to an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a device body according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of an 8mm adjustment rod according to an embodiment of the present invention;

[0023] Figure 5This is a schematic diagram of a 10 mm adjustment rod according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of measuring a 10 mm adjustment rod according to an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the rotation of a rudder bushing sleeve according to an embodiment of the present invention;

[0026] Figure 8 This is a measurement diagram of an 8 mm adjustment rod according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] Measuring device 100, hand chain hoist 101, vernier caliper 102, device body 120, extension portion 121, threaded portion 122, contact portion 123, adjustment handle 130, fastening nut 140, 8 mm adjustment rod 150-1, 10 mm adjustment rod 150-2, abutment portion 151, grip portion 152, connection portion 153,

[0029] The steering gear 210 , the steering gear seat 220 , the rudder stock enclosure 230 , the dummy rudder 240 , the rudder stock 310 , the rudder blade 320 , the rudder stock bushing 330 , the rudder stock bushing 340 , the rudder bearing body 350 , the protection tube 360 ​​, the dummy rudder outer plate 370 , and the screw plug hole 380 . DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, top, bottom, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0034] Reference below Figure 1-Figure 3 A rudder system bushing clearance measuring device and method with a threaded adjustment rod according to an embodiment of the present invention is described.

[0035] like Figure 1-Figure 3 As shown, a rudder bushing clearance measuring device with a threaded adjustment rod (hereinafter referred to as the measuring device 100) includes a device body 120, an adjustment handle 130, a fastening nut 140 and an adjustment rod.

[0036] The device body 120 is in the shape of a long round rod, and is used to extend into the gap of the rudder bushing of the hull, and the adjustment handle 130 is threadedly connected to the device body 120, and the adjustment handle 130 is sleeved on one side of the device body 120. The adjustment handle 130 is used to be screwed to the end face of the screw plug hole 380 to fix the measuring end face of the device body 120. The fastening nut 140 is threadedly connected to the device body 120 and sleeved on the device body 120, and is located on one side of the adjustment handle 130. When the adjustment handle 130 is screwed to the end face of the screw plug hole 380, the fastening nut 140 is tightened to prevent the adjustment handle 130 from loosening.

[0037] The adjusting rod is connected to one end of the device body 120 and is used to be inserted into the small hole of the rudder bearing body 350, wherein a threaded hole is provided at one end of the device body 120 away from the adjusting handle 130, and the adjusting rod is detachably threadedly connected to the thread of the device body 120.

[0038] The present invention can prevent workers from entering narrow spaces to work, and prevent divers from diving underwater to work, thereby improving work safety. The device is easy to operate, greatly improving the efficiency of underwater detection, and the device has a simple structure, few parts, light weight, and is easy to carry, thereby reducing the cost of the entire set of underwater detection equipment. The device is used for measurement with higher accuracy, reaching 0.01mm, and is easy to operate.

[0039] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the device body 120, the adjustment handle 130, the adjustment rod and the fastening nut 140 are all made of round steel, and the surface is sprayed with anti-rust oil. The device body 120 is made of round steel with a diameter of 40mm, and is connected with the fastening nut 140, the adjustment handle 130 and the adjustment rod through threads. During use, the fastening nut 140, the adjustment handle 130 and the adjustment rod are first installed on the device body 120 to form a measuring device 100 as a whole. The whole set of measuring device 100 is light in weight and convenient for staff to carry. The adjustment handle 130 and the device body 120 are connected by threads, which can achieve fine adjustment of the measuring distance. The sealing screw plug at the hull measurement position is set above the waterline, which is convenient for staff to reach the measurement position and convenient for daily maintenance.

[0040] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the device body 120 includes an extension portion 121, a threaded portion 122 and a contact portion 123. The two sides of the threaded portion 122 are respectively connected to the extension portion 121 and the contact portion 123. The diameter of the contact portion 123 is larger than the threaded portion 122, and the diameter of the threaded portion 122 is larger than the extension portion 121. A threaded hole is provided at the end of the extension portion 121 for connecting with the adjustment rod, a thread is provided on the surface of the threaded portion 122 for threaded connection with the adjustment handle 130, and a surface of the contact portion 123 is rolled with a pattern.

[0041] The inner diameter of the fastening nut 140 is equal to the inner diameter of the adjusting handle 130, and the fastening nut 140 is threadedly connected to the threaded portion 122. The fastening nut 140 can be connected to the threaded portion 122, and the rotation of the fastening nut 140 and the adjusting handle 130 on the threaded portion 122 is independently adjusted, and the adjustment of the fastening nut 140 plays the role of limiting the adjusting handle 130.

[0042] Specifically, in this embodiment, the diameter of the extension portion 121 is 20 mm, which is convenient for inserting into the screw plug hole 380 at the measurement position of the hull. The diameter of the contact portion 123 is 40 mm, which is convenient for using the end face of the contact portion 123 as the measurement contact surface during measurement, and the total length of the device body 120 is 410 mm. The adjustment handle 130 is connected to the threaded portion 122 through the thread of the threaded portion 122. The adjustment handle 130 can be fine-tuned within the length range of the threaded portion 122 to achieve fine-tuning of the measurement distance. The rolling pattern on the surface of the contact portion 123 makes it convenient for the staff to hold the contact portion 123 to rotate the device body 120 to extend into the interior of the hull. The rolling pattern can increase the contact friction between the staff's fingers and the contact portion 123 to avoid slipping.

[0043] It should be understood that the use of rolling patterns on the contact portion 123 is not the only implementation method. In some other embodiments, the periphery of the contact portion 123 can also be wrapped with rubber material for anti-slip according to actual production requirements. The present invention does not elaborate on the anti-slip structure of the contact portion 123 one by one. It should be understood that, without departing from the basic concept of the present invention, the flexible change of the anti-slip structure of the contact portion 123 should be regarded as within the protection scope defined by the present invention.

[0044] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the adjustment rod includes an abutment portion 151, a grip portion 152 and a connection portion 153. The two sides of the grip portion 152 are connected to the abutment portion 151 and the connection portion 153 respectively. The diameter of the grip portion 152 is larger than the diameter of the abutment portion 151, and the diameter of the connection portion 153 is equal to the inner diameter of the threaded hole of the extension portion 121 of the device body 120. The surface of the connection portion 153 is provided with a thread, and the connection portion 153 is threadedly connected to the threaded hole of the extension portion 121, and the surface of the grip portion 152 is rolled with patterns. The length of the rod of the connection portion 153 is equal to the depth of the threaded hole at the end of the device body 120. The staff grips the grip portion 152 of the adjustment rod and rotates the adjustment rod, so that the connection portion 153 is threadedly connected to the threaded hole of the device body 120, and the rolling pattern of the grip portion 152 has the same effect as the rolling pattern of the contact portion 123 of the device body 120, which plays an anti-slip role.

[0045] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, in order to enable the measuring device 100 to measure different parameters of the hull liner gap, the adjusting rod includes an 8 mm adjusting rod 150 - 1 and a 10 mm adjusting rod 150 - 2 .

[0046] The abutment portion 151 of the 8mm adjustment rod 150-1 has a diameter of 8mm, and is slender and can be inserted into the bushing gap. The 8mm adjustment rod 150-1 is used to be inserted into the small hole of the rudder bearing body 350 to facilitate the measurement of the bushing gap. The diameter of the 10mm adjustment rod 150-2 is 10mm, and the length of the abutment portion 151 is smaller than the thickness of the rudder bearing body 350. The abutment portion 151 of the 10mm adjustment rod 150-2 can be abutted against the end surface of the rudder bearing body 350. The 10mm adjustment rod 150-2 is used to measure the distance from the rudder stock sleeve 330 to the dummy rudder outer plate 370 and the distance from the rudder bearing body 350 to the dummy rudder outer plate 370.

[0047] In some embodiments of the present invention, reference Figure 1-Figure 3The present invention describes a method for measuring the clearance of a rudder bushing with a threaded adjustment rod according to an embodiment of the present invention. The method includes a device body 120, an adjustment handle 130, a tightening nut 140, an 8mm adjustment rod 150-1 and a 10mm adjustment rod 150-2, and also includes a vernier caliper 102 and a hand chain hoist 101. The vernier caliper 102 is horizontally arranged between the two end surfaces of the tightening nut 140 and the contact portion 123 of the device body 120, and plays a role in accurately measuring the clearance of the rudder bushing. The hand chain hoist 101 is arranged vertically, and plays a role in pressing the rudder sleeve against the bushing.

[0048] The core principle of the measuring method of the present invention is: first, let the rudder blade 320 hang freely on the hull, then use the hand winch 101 to tighten the rudder blade 320 to one side with a certain pulling force, and then use the hand winch 101 to tighten the rudder blade 320 to the other side. In this process, the threaded adjustment rod is inserted into the rudder bearing body 350 three times respectively, so that the adjustment rod directly contacts the rudder system sleeve, and the adjustment handle 130 is rotated. By using the vernier caliper 102 to measure the different distances between the adjustment handle 130 and the device body 120, the function of measuring the rudder system bushing gap is realized.

[0049] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, in order to facilitate the implementation of future underwater inspection work, the numerical data of the distance A from the rudder bearing body 350 to the dummy rudder outer plate 370 and the distance B from the rudder shaft sleeve 330 to the dummy rudder outer plate 370 need to be recorded and archived during the ship construction process.

[0050] First, keep the rudder system in a free hovering state.

[0051] 1. Install the corresponding 10 mm adjustment rod 150 - 2 onto the device body 120 , tighten the 10 mm adjustment rod 150 - 2 and the device body 120 , and loosen the fastening nut 140 on the device body 120 ;

[0052] 2. Insert the measuring device 100 into the hull to be measured, insert the device body 120 into the screw plug hole 380 of the dummy rudder outer plate 370, and tighten the adjustment handle 130 to abut against the screw plug hole 380;

[0053] 3. Fix the reference position of the measuring device 100, rotate the device body 120 until the device body 120 is tightened, and lock the fastening nut 140. At this time, the 10 mm adjustment rod 150-2 contacts the surface of the rudder bearing body 350;

[0054] 4. Measure relevant data: Use the vernier caliper 102 to measure the end surface distance L4 from the end of the fastening nut 140 to the contact portion 123 of the device body 120;

[0055] The distance A from the rudder bearing body 350 to the false rudder outer plate 370 = 10 mm: the length of the gripping portion 152 of the adjusting rod 150-2 + ​​the length of the device body 120 - (the length of the adjusting handle 130 + the length of the fastening nut 140 + the length of the contact portion 123 of the device body 120 + L4);

[0056] The distance B from the rudder stock sleeve 330 to the false rudder outer plate 370 = A + the thickness of the rudder stock bushing 340 and the rudder bearing body 350;

[0057] 5. Record the data and record the values ​​of A and B in a book to facilitate quick judgment of the status of the rudder bushing in subsequent rudder bushing clearance measurements.

[0058] During the measurement of the rudder system bushing gap, the measured length of the device body 120 inserted into the rudder system = the total length after the 8mm adjusting rod 150-1 is connected to the device body 120 - (the length of the adjusting handle 130 + the length of the fastening nut 140 + the distance between the fastening nut 140 and the contact part 123 + the length of the contact part 123 of the device body 120).

[0059] When the measured value = B±1, the rudder bushing has not rotated and displacement occurs, and underwater rudder bushing clearance measurement is performed. When the measured value = A+90±1, the rudder bushing rotates and the ship needs to be docked for dismantling and inspection.

[0060] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the rudder system bushing clearance measurement process is as follows: first, keep the rudder system equipment in a free hovering state.

[0061] 1. Install the 8mm adjustment rod 150-1 for measurement onto the device body 120, tighten the 8mm adjustment rod 150-1 and the device body 120, and loosen the fastening nut 140 on the device body 120;

[0062] 2. Insert the measuring device 100 into the hull to be measured, remove the plug of the screw plug hole 380, insert the device body 120 into the screw plug hole 380 of the dummy rudder outer plate 370, tighten the adjustment handle 130 and make it contact with the screw plug hole 380;

[0063] 3. Fix the reference position of the measuring device 100, rotate the device body 120 until the device body 120 is tightened, and lock the fastening nut 140. At this time, the 8 mm adjustment rod 150-1 contacts the surface of the rudder stock sleeve 330;

[0064] 4. Measure the gap in the hovering state, and use the vernier caliper 102 to measure the end surface distance L1 from the end of the fastening nut 140 to the contact portion 123 of the device body 120;

[0065] 5. Change to different directions, measure the gaps in different directions, loosen the fastening nut 140, remove the device body 120, and use the hand chain hoist 101 to tighten the rudder blade 320 to the starboard side of the ship with a tension of 0.5 t;

[0066] The device body 120 is inserted into the screw plug hole 380 of the fake rudder outer plate 370, and the adjustment handle 130 is tightened and abuts against the screw plug hole 380;

[0067] The device body 120 rotates until the device body 120 is tightened and the fastening nut 140 is locked. At this time, the 8 mm adjustment rod 150 - 1 contacts the surface of the rudder stock sleeve 330 ;

[0068] The vernier caliper 102 measures the end surface distance L2 from the end of the fastening nut 140 to the contact portion 123 of the device body 120, and the starboard clearance G1 of the rudder stock bushing 340 = L1-L2;

[0069] The fastening nut 140 is opened, and the device body 120 is screwed out counterclockwise;

[0070] The hand chain hoist 101 pulls the rudder blade 320 toward the port side of the ship with a tension of 0.5 t;

[0071] The device body 120 is screwed inward clockwise to lock the fastening nut 140. At this time, the 8mm adjustment rod 150-1 contacts the surface of the rudder stock sleeve 330;

[0072] The vernier caliper 102 measures the end surface distance L3 from the end of the fastening nut 140 to the contact portion 123 of the device body 120 , and the port side clearance G2 of the rudder stock bushing 340 is equal to L3 − G1 .

[0073] As shown in the above measurement method, the starboard clearance G1=L1-L2 of the rudder stock bushing 340 and the port clearance G2=L3-G1 of the rudder stock bushing 340 are respectively obtained through three measurements, and the clearance measurement of the rudder stock bushing 340 is completed here.

[0074] Compared with the traditional rudder bushing clearance measurement method, this measurement method only requires the staff to take the measuring device 100 tool on board to remove the detection hole, and use it with the lifting hand winch 101, with high measurement accuracy. The measuring device 100 is light and easy to carry, and easy to carry out daily maintenance. The construction cost is low, and only one detection hole needs to be added to the rudder system. The traditional rudder bushing clearance measurement method is limited by the detection space. Some ships with smaller tonnage and smaller space will not be able to measure the rudder bushing clearance. The measurement method using the device of the present invention can be applied to various types of rudder system structures and ships of various tonnages.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rudder bushing clearance measuring device with a threaded adjustment rod, characterized in that: include: A device body (120), wherein the device body (120) is used to extend into a ship hull; an adjusting handle (130), the adjusting handle (130) being threadedly connected to the device body (120), the adjusting handle (130) being sleeved on one side of the device body (120); a fastening nut (140), the fastening nut (140) being threadedly connected to the device body (120), sleeved on the device body (120), and located on one side of the adjustment handle (130); an adjusting rod connected to one end of the device body (120) and used for being inserted into a small hole of the rudder bearing body (350); Wherein, a threaded hole is provided at one end of the device body (120) away from the adjustment handle (130), and the adjustment rod is detachably threadedly connected to the thread of the device body (120); The device body (120) comprises an extension portion (121), a threaded portion (122) and a contact portion (123); two sides of the threaded portion (122) are respectively connected to the extension portion (121) and the contact portion (123); the diameter of the contact portion (123) is larger than that of the threaded portion (122); and the diameter of the threaded portion (122) is larger than that of the extension portion (121); The end of the extension portion (121) is provided with a threaded hole for connecting with the adjustment rod; The surface of the threaded portion (122) is provided with threads for being threadedly connected to the adjustment handle (130); The surface of the contact portion (123) is rolled with patterns; The adjusting rod comprises an abutting portion (151), a holding portion (152) and a connecting portion (153); two sides of the holding portion (152) are respectively connected to the abutting portion (151) and the connecting portion (153); the diameter of the holding portion (152) is greater than the diameter of the abutting portion (151); and the diameter of the connecting portion (153) is equal to the inner diameter of the threaded hole of the extension portion (121) of the device body (120); The surface of the connecting portion (153) is provided with threads, and the connecting portion (153) is threadedly connected to the threaded hole of the extension portion (121); The surface of the gripping portion (152) is rolled with patterns; The adjusting rod comprises an 8 mm adjusting rod (150-1) and a 10 mm adjusting rod (150-2); the 8 mm adjusting rod (150-1) is used to be inserted into a small hole of the rudder bearing body (350) to facilitate the measurement of the bushing clearance; and the 10 mm adjusting rod (150-2) is used to measure the distance from the rudder stock shaft sleeve (330) to the dummy rudder outer plate (370) and the distance from the rudder bearing body (350) to the dummy rudder outer plate (370); The inner diameter of the adjustment handle (130) is equal to the diameter of the threaded portion (122) of the device body (120); the inner wall of the adjustment handle (130) is provided with threads, and the adjustment handle (130) is threadedly connected to the threaded portion (122); The surface of the adjusting handle (130) is rolled with patterns; It also comprises a hand chain hoist 101, which is arranged vertically and plays the role of pressing the rudder system sleeve tightly against the bushing.

2. A rudder bushing clearance measuring device with a threaded adjustment rod according to claim 1, characterized in that: The inner diameter of the fastening nut (140) is equal to the inner diameter of the adjustment handle (130), and the fastening nut (140) is threadedly connected to the threaded portion (122).

3. A rudder bushing clearance measuring device with a threaded adjustment rod according to claim 1 or 2, characterized in that: The device body (120), the adjustment handle (130), the adjustment rod and the fastening nut (140) are all made of round steel and have their surfaces sprayed with anti-rust oil.

4. A method for measuring the clearance of a rudder bushing with a threaded adjustment rod, using a rudder bushing clearance measuring device with a threaded adjustment rod as claimed in any one of claims 1 to 3, comprising the device body (120), the adjustment handle (130), the fastening nut (140), the 8 mm adjustment rod (150-1) and the 10 mm adjustment rod (150-2), and also comprising a vernier caliper (102) and a hand chain hoist (101), characterized in that: Keep the rudder system equipment in a free-hover state; The 10 mm adjustment rod (150-2) is screwed onto the device body (120), and the fastening nut (140) on the device body (120) is loosened; The device body (120) is inserted into the screw plug hole (380) of the fake rudder outer plate (370), and the adjustment handle (130) is tightened and abuts against the screw plug hole (380); The device body (120) is rotated until the device body (120) is tightened, thereby locking the fastening nut (140), and at this time, the 10 mm adjustment rod (150-2) is in contact with the surface of the rudder bearing body (350); The vernier caliper (102) measures an end surface distance L4 from the end of the fastening nut (140) to the contact portion (123) of the device body (120); The distance A from the rudder bearing body (350) to the fake rudder outer plate (370) = the length of the gripping portion (152) of the 10 mm adjustment rod (150-2) + the length of the device body (120) - (the length of the adjustment handle (130) + the length of the fastening nut (140) + the length of the contact portion (123) of the device body (120) + L4); The distance B from the rudder stock shaft sleeve (330) to the false rudder outer plate (370) = A + the thickness of the rudder stock bushing (340) and the rudder bearing body (350); The measured length of the device body (120) inserted into the rudder system = the total length of the 8 mm adjustment rod (150-1) after being connected to the device body (120) - (the length of the adjustment handle (130) + the length of the fastening nut (140) + the distance between the fastening nut (140) and the contact portion (123) + the length of the contact portion (123) of the device body (120)); When the measured value = B±1, the rudder bushing has no rotational displacement, and the underwater rudder bushing clearance measurement is performed; When the measured value = A+90±1, the rudder bushing rotates and the ship needs to be docked for dismantling and inspection.

5. A method for measuring clearance of a rudder bushing with a threaded adjustment rod according to claim 4, characterized in that: Keep the rudder system equipment in a free-hover state; The 8 mm adjustment rod (150-1) is screwed onto the device body (120), and the fastening nut (140) on the device body (120) is loosened; The device body (120) is inserted into the screw plug hole (380) of the fake rudder outer plate (370), and the adjustment handle (130) is tightened and abuts against the screw plug hole (380); The device body (120) is rotated until the device body (120) is tightened, thereby locking the fastening nut (140), and at this time, the 8 mm adjustment rod (150-1) is in contact with the surface of the rudder stock sleeve (330); The vernier caliper (102) measures an end surface distance L1 from an end of the fastening nut (140) to the contact portion (123) of the device body (120); The fastening nut (140) is loosened and the device body (120) is removed.

6. A method for measuring clearance of a rudder bushing with a threaded adjustment rod according to claim 5, characterized in that: The hand chain hoist (101) pulls the rudder blade (320) toward the starboard side of the ship with a tension of 0.5 t; The device body (120) is inserted into the screw plug hole (380) of the fake rudder outer plate (370), and the adjustment handle (130) is tightened and abuts against the screw plug hole (380); The device body (120) is rotated until the device body (120) is tightened, thereby locking the fastening nut (140), and at this time, the 8 mm adjustment rod (150-1) is in contact with the surface of the rudder stock sleeve (330); The vernier caliper (102) measures the end surface distance L2 from the end of the fastening nut (140) to the contact portion (123) of the device body (120), and the starboard clearance G1 of the rudder stock bushing (340) = L1-L2; The fastening nut (140) is opened, and the device body (120) is screwed out counterclockwise; The hand chain hoist (101) pulls the rudder blade (320) toward the port side of the ship with a tension force of 0.5 t; The device body (120) is screwed inwardly clockwise to lock the fastening nut (140), and at this time, the 8 mm adjustment rod (150-1) contacts the surface of the rudder stock sleeve (330); The vernier caliper (102) measures the end surface distance L3 from the end of the fastening nut (140) to the contact portion (123) of the device body (120), and the port side clearance G2 of the rudder stock bushing (340) = L3 - G1.

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