A method for vertically connecting a ship's steering gear and rudder stock

Abstract

This invention discloses a vertical fitting method for a ship's steering gear and rudder stock, belonging to the field of shipbuilding and maintenance technology. The method includes the following steps: Step 1, positioning and leveling the steering gear rotor; Step 2, grinding the rudder stock cone with the rotor's conical hole; Step 3, keying the rudder stock cone; Step 4, inspecting the key assembly; Step 5, installing the rudder stock nut and performing a contact check; Step 6, three-party acceptance. By fixing the steering gear rotor below with the conical hole facing upwards, the traditional process of requiring operators to look upwards for observation is completely eliminated. Operators can easily observe the contact condition of the conical hole, apply paint, and perform grinding while standing on the ground, greatly improving their field of vision and operating space. Simultaneously, with the rudder stock positioned above, a hoist can easily be used to achieve the forward and reverse grinding actions of "pressing down for grinding and lifting up for finishing," avoiding uneven grinding caused by gravity and significantly improving the fitting accuracy.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding and maintenance technology, specifically to a method for vertically assembling a ship's steering gear and rudder stock. Background Technology

[0002] In shipbuilding and dry-docking engineering, rudder system installation is a crucial step. The quality of the conical mating between the rudder gear (rudder stick) and the rudder stick (rudder rotor) directly determines the reliability of the rudder system transmission, its torque transmission capability, and the ship's maneuverability. Mating refers to a precision machining process that uses abrasives or colorants to remove microscopic high points through the relative movement of the two mating surfaces, achieving the designed contact area, contact pattern distribution, and axial clamping amount.

[0003] The existing servo motor and rudder stick matching methods still have the following problems: Limited fluffing methods: Traditional vertical fluffing processes often use a "rudder motor on top, rudder stock on the bottom" approach, which cannot adapt to different dock conditions and equipment, resulting in poor application flexibility. Limited operating space and blind spots: In the traditional process of "servo motor on top", operators need to look up or crawl into a narrow space to observe the contact of the rotor cone hole. Coloring, grinding and inspection are extremely inconvenient, resulting in low efficiency of stain inspection and difficulty in ensuring the uniformity of grinding. The control of process parameters is crude: the existing process relies heavily on workers' experience and lacks quantitative testing standards, resulting in inconsistent batch quality and different personnel, and the acceptance standards are highly subjective. Lack of quality control in keyway mating: The temporary key guiding function during the mating process is often overlooked, and the inspection after the actual key is installed is often limited to simple tapping, lacking quantitative control of lateral clearance and upper plane clearance. This leads to uneven force on the key in the keyway, which can easily cause micro-wear or loosening after long-term operation. Inaccurate control of axial clamping amount Q: Axial clamping amount Q is a key indicator for judging the interference of tapered surface fit. In existing technology, due to inconsistent measurement benchmarks or operational errors, the clamping amount Q is often insufficient (insufficient torque transmission) or excessive (excessive assembly stress). Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a vertical mating method for ship steering gear and rudder stock. This method provides two mutually opposite vertical mating processes (steering gear at the bottom / rudder stock at the top, and steering gear at the top / rudder stock at the bottom), combined with quantitative mating and testing standards, to achieve high-precision, high-efficiency and safe operation of conical mating surface mating. This solves the problems of existing technologies, such as single mating method, limited operating space and blind spots, coarse process parameter control, lack of keyway fit quality control, and inaccurate control of axial tightening amount Q.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is implemented as follows: A method for vertically engaging a ship's steering gear and rudder stock, wherein the steering gear is positioned below and the rudder stock is positioned above, includes the following steps: Step 1: Position and level the servo rotor: Fix the servo rotor on the bracket with the large end of its conical hole facing upwards, and level it with a spirit level; Step 2: Grind the rudder stock cone and the rotor cone hole: Use a hoist to lift the rudder stock vertically with its cone facing down, install two symmetrically distributed temporary keys on the rudder stock cone, use the temporary keys to perform dye grinding on the rotor cone hole, and check the axial tightness Q of the rudder stock cone and the rotor cone hole until the test is qualified. Step 3: Keying the rudder stock cone: Remove the two temporary keys and grind new practical keys according to their dimensions, then install the two new practical keys on the rudder stock cone; Step 4: Inspection of the assembly of the practical keys: Perform a tapping test and feeler gauge test on the practical keys until they pass the inspection; Step 5: Install the rudder stock nut and perform a contact check: After assembling the rudder stock cone with the rotor cone hole, use a wrench to install the nut on the end of the rudder stock cone and check the contact surface between the nut and the rudder rotor until the test is qualified; Step Six: Tripartite Acceptance: After all the above inspections are completed, the shipowner and surveyor shall conduct an acceptance inspection.

[0006] By adopting the above solution, and fixing the servo rotor below with the conical hole facing upward, the predicament of operators having to look up to observe in the traditional process is completely changed. Operators can easily observe the contact condition of the conical hole, paint, and grind while standing on the ground, which greatly improves the working field of vision and operating space. At the same time, with the servo stick located above, the forward and reverse grinding actions of "pressing down to grind and lifting up to adjust" can be easily achieved using a hoist, avoiding uneven grinding caused by gravity and significantly improving the grinding accuracy.

[0007] A method for vertically engaging a ship's steering gear and rudder stock, wherein the steering gear is positioned above and the rudder stock below, includes the following steps: Step 1: Positioning and leveling the rudder stock: In the static balance pit, lay a steel plate, fix the rudder stock flange to the steel plate, support it firmly with steel pipes around it, and use a level to find the level at the shaft head. Step 2: Grind the rudder post cone and the rotor cone hole: Use a hoist to lift the rudder rotor horizontally with the large end of its cone hole facing down. Install two symmetrically distributed temporary keys on the rudder post cone. Use the temporary keys to perform dye grinding on the rotor cone hole. Check the axial tightness Q between the rudder post cone and the rotor cone hole until the test is qualified. Step 3: Keying the rudder stock cone: Remove the two temporary keys and grind new practical keys according to their dimensions, then install the two new practical keys on the rudder stock cone; Step 4: Inspection of the assembly of the practical keys: Perform a tapping test and feeler gauge test on the practical keys until they pass the inspection; Step 5: Install the rudder stock nut and perform a contact check: After assembling the rudder stock cone with the rotor cone hole, use a wrench to install the nut on the end of the rudder stock cone and check the contact surface between the nut and the rudder rotor until the test is qualified; Step Six: Tripartite Acceptance: After all the above inspections are completed, the shipowner and surveyor shall conduct an acceptance inspection.

[0008] By adopting the above solution, which is a reverse process of the above solution, it is suitable for working conditions where the rudder stock is long or the servo motor is relatively light and easy to hoist from above. By fixing the rudder stock in the static balance pit and using steel pipe support, the vertical stability of the rudder stock is ensured, avoiding scratches on the mating surfaces caused by rudder stock shaking. At this time, the servo motor is located above, which also makes it easy for the operator to observe the cone hole from above.

[0009] As a preferred embodiment of the vertical fitting method for ship steering gear and rudder stock, in the step one of positioning and leveling the steering gear rotor or the rudder stock, the leveling error using a level must not exceed 0.15mm / M. The leveling accuracy of 0.15mm / M ensures the verticality reference of the rotor cone hole or the rudder stock and prevents one-sided contact of the cone surface.

[0010] As a preferred embodiment of the vertical fitting method for ship steering gear and rudder stock, in the second step of fitting the rudder stock cone and the rotor cone hole, the axial tightening amount Q of the rudder stock cone and the rotor cone hole must not be less than 25mm to pass the inspection. By strictly specifying that the axial tightening amount Q is not less than 25mm, it is ensured that the cone surface fit has sufficient interference to transmit the rated torque and prevent loosening or slippage during navigation.

[0011] In a preferred embodiment of a vertical fitting method for a ship's steering gear and rudder stock, during the fitting of the rudder stock cone and the rotor cone hole in step two, the following requirements should be met when the rotor cone hole is colored and ground: a. The staining area of ​​the rotor cone hole should reach 75%. The 75% staining area ensures the contact bearing area, and there should be no less than 2 staining spots in an area of ​​25x25mm to ensure the uniform distribution of contact spots and avoid stress concentration in local point contact. b. Use feeler gauges to check the large and small ends of the rotor cone hole. A 0.05mm feeler gauge must not be inserted within 90% of the circumference, but individual scattered parts are allowed. A 0.10mm feeler gauge should not be inserted to a depth of more than 20mm and a width of more than 30mm, and there should be no more than two insertions at each end. The above quantification of feeler gauge standards effectively limits the ellipticity and taper error of the cone hole, ensuring a tight fit and no looseness.

[0012] In a preferred embodiment of the vertical assembly method for ship steering gear and rudder post, the following requirements should be met during the inspection of the practical key assembly in step four: (1) Tapping inspection and feeler gauge inspection. a. There should be no floating sound when striking the bottom of the key. The bottom floating is eliminated by tapping to check and eliminate uneven force caused by uneven key bottom. b. Before inserting the key into the rotor tapered hole, a 0.05mm feeler gauge must not be inserted within 95% of the length, but individual scattered parts are allowed; the insertion depth of the 0.05mm feeler gauge must not exceed 1 / 4 of the keyway depth; the feeler gauge standard strictly limits the lateral clearance between the key and the groove to ensure the smoothness of torque transmission. c. After the key is inserted into the rotor tapered hole, a 0.10mm feeler gauge must not be inserted within 95% of the length, and a 0.15mm feeler gauge must not be inserted at all, but individual scattered parts are allowed; the insertion depth of the 0.10mm feeler gauge must not exceed 1 times the width of the keyway; the feeler gauge standard strictly limits the lateral clearance between the key and the slot to ensure the smoothness of torque transmission. d. The gap between the practical key and the upper surface of the keyway should be 0.30-0.50mm to allow space for thermal expansion and lubrication film, and to prevent jamming during operation.

[0013] In a preferred embodiment of the vertical fitting method for a ship's steering gear and rudder stock, during the installation of the rudder stock nut and contact check in step five, a 0.05mm feeler gauge must not be inserted into 90% of the contact surface between the nut and the steering gear rotor. However, in individual locations, the insertion depth and width of a 0.10mm feeler gauge are permitted, but should not exceed 50mm. This ensures that the end face of the nut and the end face of the rotor are in close contact to prevent skewing under preload, thereby guaranteeing the alignment accuracy of the axis and reducing vibration and fatigue cracks.

[0014] The beneficial effects of this invention are: 1. More flexible process selection: It provides two standardized vertical coupling schemes, "steering gear at the bottom" and "steering gear at the top", which are opposite to each other and can adapt to different dock conditions and equipment conditions. 2. Rigorous and controllable quantitative standards: Transforming traditional experience-based processes into quantitative data standards makes the blending quality controllable and traceable, effectively avoiding quality fluctuations caused by human factors; 3. High reliability of key connection: Through the symmetrical distribution of temporary keys and the strict double inspection of practical keys by tapping and feeler gauge, the precision fit between the key and the groove is ensured, eliminating the hidden dangers of key bottom suspension and excessive lateral clearance, and significantly improving the reliability of torque transmission of the rudder system. 4. High operational safety and efficiency: The optimized posture makes key inspection points (conical holes, nut end faces) easier to access, reducing the risks of working at heights and in confined spaces, while shortening the fitting cycle. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a plan view of the ship's steering gear and rudder stock before they are coupled in Example 1; Figure 2 This is a plan view of the ship's steering gear and rudder stock after they have been fitted together in Example 1; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a plan view of the ship's steering gear and rudder stock before they are coupled in Example 2; Figure 5 This is a plan view of the ship's steering gear and rudder stock after they have been fitted together in Example 2; Figure 6 for Figure 5 A magnified view of a section at point B.

[0017] Markings in the diagram: 1-Rotor cone hole; 2-Rudder rod cone; 3-Bracket; 4-Hanging hoist; 5-Temporary lifting lug; 6-Temporary key; 7-Practical key; 8-Oil top; 9-Rudder rod nut; 10-Steel plate; 11-Steel pipe; 12-Static balance pit; 13-Bolt hanging ring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1, as Figures 1 to 3As shown, a vertical coupling method for a ship's steering gear and rudder stock is provided, which uses the steering gear at the bottom and the rudder stock at the top for coupling, including the following steps: like Figures 1 to 2 As shown, step one, positioning and leveling the servo rotor: fix the servo rotor on bracket 3 with the large end of its conical hole facing upward, and level it with a level.

[0020] The leveling error using a spirit level must not exceed 0.15 mm / m. A leveling accuracy of 0.15 mm / m ensures the verticality reference of the rotor cone hole 1 and prevents one-sided contact of the cone surface.

[0021] like Figures 1 to 2 As shown, in step two, the rudder stock cone 2 and the rotor cone hole 1 are fitted together: the rudder stock is vertically lifted with the cone facing down using a hoist 4, and the hoist 4 is suspended on a temporary lifting lug 5 located on the same axis as the rudder stock. Two symmetrically distributed temporary keys 6 are installed on the rudder stock cone. The rotor cone hole 1 is then rubbed with dye using the temporary keys 6. The axial tightness Q between the rudder stock cone 2 and the rotor cone hole 1 is checked until the test is qualified.

[0022] The following requirements should be met when applying dye to the rotor cone hole 1 during grinding: a. The staining area of ​​rotor cone hole 1 should reach 75%. The 75% staining area ensures the contact bearing area, and there should be no less than 2 staining spots in an area of ​​25x25mm to ensure the uniform distribution of contact spots and avoid stress concentration in local point contact. b. Use feeler gauges to check the large and small ends of rotor cone hole 1. A 0.05mm feeler gauge must not be inserted within 90% of the circumference, but individual scattered parts are allowed. A 0.10mm feeler gauge should not be inserted to a depth of more than 20mm and a width of more than 30mm, and there should be no more than two insertions at each end. The above quantification of feeler gauge standards effectively limits the ellipticity and taper error of the cone hole, ensuring a tight fit and no looseness.

[0023] The above-mentioned strict requirement that the axial tightening amount Q be no less than 25mm ensures that the conical surface fit has sufficient interference to transmit the rated torque and prevents loosening or slippage during navigation.

[0024] In the above process, when the rotor cone hole 1 is dipped and ground by temporary key 6, the rudder cone 2 is lowered into the rotor cone hole 1 by hoist 4, and then the rudder cone 2 is pushed out of the rotor cone hole 1 by oil top 8 at the bottom of bracket 3. This process is repeated.

[0025] like Figures 1 to 2 As shown, step three involves keying the rudder stock cone 2: remove the two temporary keys 6 and grind new practical keys 7 according to their dimensions, then install the two new practical keys 7 on the rudder stock cone.

[0026] Step 4: Assembly inspection of utility key 7: Perform a tapping inspection and feeler gauge inspection on utility key 7 until it passes the test.

[0027] The above tapping and feeler gauge checks should meet the following requirements: a. When striking the bottom of the key 7, there should be no floating sound. By striking, floating at the bottom is eliminated, thus preventing uneven force caused by uneven key bottom. b. Before inserting the key 7 into the rotor tapered hole 1, a 0.05mm feeler gauge must not be inserted within 95% of the length, but individual scattered parts are allowed; the insertion depth of the 0.05mm feeler gauge must not exceed 1 / 4 of the keyway depth; the feeler gauge standard strictly limits the lateral clearance between the key and the groove, ensuring the smoothness of torque transmission. c. After the key 7 is inserted into the rotor tapered hole 1, a 0.10mm feeler gauge must not be inserted within 95% of the length, and a 0.15mm feeler gauge must not be inserted at all, but individual scattered parts are allowed; the insertion depth of the 0.10mm feeler gauge must not exceed 1 times the width of the keyway; the feeler gauge standard strictly limits the lateral clearance between the key and the groove to ensure the smoothness of torque transmission. d. The gap between the practical key 7 and the upper surface of the keyway should be 0.30-0.50mm to allow space for thermal expansion and lubrication film, and to prevent jamming during operation.

[0028] like Figure 3 As shown, in step five, install the rudder post nut 9 and perform a contact check: After assembling the rudder post cone 2 with the rotor cone hole 1, use a wrench to install the nut at the end of the rudder post cone 2 and check the contact surface between the nut and the rudder rotor until the test is qualified.

[0029] During the above contact checks, a 0.05mm feeler gauge must not be inserted into 90% of the contact surface between the nut and the servo rotor. However, a 0.10mm feeler gauge may be used in individual locations, with the insertion depth and width not exceeding 50mm. Ensure that the end face of the nut and the end face of the rotor are in close contact to prevent skewing under preload, thereby ensuring the alignment accuracy of the axis and reducing vibration and fatigue cracks.

[0030] Step Six: Tripartite Acceptance: After all the above inspections are completed, the shipowner and surveyor shall conduct an acceptance inspection.

[0031] In Example 1, by fixing the servo rotor below with the conical hole facing upward, the predicament of operators having to look up to observe in the traditional process is completely changed. Operators can easily observe the contact condition of the conical hole, paint, and grind while standing on the ground, which greatly improves the working field of vision and operating space. At the same time, with the servo stick located above, the forward and reverse grinding actions of "pressing down to grind and lifting up to adjust" can be easily achieved using the hoist 4, avoiding uneven grinding caused by gravity and significantly improving the grinding accuracy.

[0032] Example 2, as Figures 4 to 6 As shown, a vertical coupling method for a ship's steering gear and rudder stock is provided, wherein the coupling is performed with the steering gear on top and the rudder stock on the bottom, including the following steps: like Figures 4 to 5 As shown, step one, positioning and leveling the rudder stock: In the static balance pit 12, lay a steel plate 10, fix the rudder stock flange on the steel plate 10, support it firmly with steel pipes 11 around the perimeter, and use a level to find the level at the shaft head.

[0033] The leveling error using a spirit level must not exceed 0.15 mm / m. A leveling accuracy of 0.15 mm / m ensures the verticality reference of the rudder stock and prevents one-sided contact of the conical surface.

[0034] like Figures 4 to 5 As shown, in step two, the rudder shaft cone 2 and the rotor cone hole 1 are fitted together: the rudder rotor is lifted horizontally with the large end of the cone hole facing down using a hoist 4. The hoist 4 is suspended on two bolt rings 13 above the rudder rotor. Two symmetrically distributed temporary keys 6 are installed on the rudder shaft cone. The rotor cone hole 1 is then rubbed with dye using the temporary keys 6. The axial tightness Q between the rudder shaft cone 2 and the rotor cone hole 1 is checked until the test is qualified.

[0035] The following requirements should be met when applying dye to the rotor cone hole 1 during grinding: a. The staining area of ​​rotor cone hole 1 should reach 75%. The 75% staining area ensures the contact bearing area, and there should be no less than 2 staining spots in an area of ​​25x25mm to ensure the uniform distribution of contact spots and avoid stress concentration in local point contact. b. Use feeler gauges to check the large and small ends of rotor cone hole 1. A 0.05mm feeler gauge must not be inserted within 90% of the circumference, but individual scattered parts are allowed. A 0.10mm feeler gauge should not be inserted to a depth of more than 20mm and a width of more than 30mm, and there should be no more than two insertions at each end. The above quantification of feeler gauge standards effectively limits the ellipticity and taper error of the cone hole, ensuring a tight fit and no looseness.

[0036] The above-mentioned strict requirement that the axial tightening amount Q be no less than 25mm ensures that the conical surface fit has sufficient interference to transmit the rated torque and prevents loosening or slippage during navigation.

[0037] In the above process, when the rotor cone hole 1 is dipped and ground by temporary key 6, the rotor cone hole 1 is lowered onto the rudder cone 2 by hoist 4, and then the rudder cone 2 is pushed out of the rotor cone hole 1 by oil jack 8 at the top of the rotor cone hole 1. This process is repeated.

[0038] like Figures 4 to 5As shown, step three involves keying the rudder stock cone 2: remove the two temporary keys 6 and grind new practical keys 7 according to their dimensions, and install the two new practical keys 7 on the rudder stock cone.

[0039] Step 4: Assembly inspection of utility key 7: Perform a tapping inspection and feeler gauge inspection on utility key 7 until it passes the test.

[0040] The above tapping and feeler gauge checks should meet the following requirements: a. When striking the bottom of the key 7, there should be no floating sound. By striking, floating at the bottom is eliminated, thus preventing uneven force caused by uneven key bottom. b. Before inserting the key 7 into the rotor tapered hole 1, a 0.05mm feeler gauge must not be inserted within 95% of the length, but individual scattered parts are allowed; the insertion depth of the 0.05mm feeler gauge must not exceed 1 / 4 of the keyway depth; the feeler gauge standard strictly limits the lateral clearance between the key and the groove, ensuring the smoothness of torque transmission. c. After the key 7 is inserted into the rotor tapered hole 1, a 0.10mm feeler gauge must not be inserted within 95% of the length, and a 0.15mm feeler gauge must not be inserted at all, but individual scattered parts are allowed; the insertion depth of the 0.10mm feeler gauge must not exceed 1 times the width of the keyway; the feeler gauge standard strictly limits the lateral clearance between the key and the groove to ensure the smoothness of torque transmission. d. The gap between the practical key 7 and the upper surface of the keyway should be 0.30-0.50mm to allow space for thermal expansion and lubrication film, and to prevent jamming during operation.

[0041] like Figure 6 As shown, in step five, install the rudder post nut 9 and perform a contact check: After assembling the rudder post cone 2 with the rotor cone hole 1, use a wrench to install the nut at the end of the rudder post cone 2 and check the contact surface between the nut and the rudder rotor until the test is qualified.

[0042] During the above contact checks, a 0.05mm feeler gauge must not be inserted into 90% of the contact surface between the nut and the servo rotor. However, a 0.10mm feeler gauge may be used in individual locations, with the insertion depth and width not exceeding 50mm. Ensure that the end face of the nut and the end face of the rotor are in close contact to prevent skewing under preload, thereby ensuring the alignment accuracy of the axis and reducing vibration and fatigue cracks.

[0043] Step Six: Tripartite Acceptance: After all the above inspections are completed, the shipowner and surveyor shall conduct an acceptance inspection.

[0044] Example 2 is a reverse process of the above scheme, which is suitable for working conditions where the rudder stock is long or the servo motor is relatively light and easy to hoist from above. By fixing the rudder stock in the static balance pit 12, the vertical stability of the rudder stock is ensured by the support of the steel pipe 11, and the mating surface is avoided due to the rudder stock shaking. At this time, the servo motor is located above, which also makes it easy for the operator to observe the cone hole from above.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for vertically coupling a ship's steering gear and rudder stock, characterized in that, Fitting is carried out in the way that the servo motor is at the bottom and the rudder stock is at the top, including the following steps: Step 1. Position and level the servo motor rotor: Fix the servo motor rotor on the bracket with its large end of the tapered hole facing upward, and level it with a spirit level. Step 2. Grind and fit the tapered surface of the rudder stock and the tapered hole of the rotor: Use a hoist to vertically lift the rudder stock with its tapered surface facing downward, install two symmetrically distributed temporary keys on the tapered surface of the rudder stock, and use the temporary keys to perform color smearing and grinding on the tapered hole of the rotor. Detect the axial tightening amount Q between the tapered surface of the rudder stock and the tapered hole of the rotor until the detection is qualified. Step 3. Fit keys for the tapered surface of the rudder stock: Remove the two temporary keys and grind and fit new working keys according to their dimensions, and install two new working keys on the tapered surface of the rudder stock. Step 4. Check the assembly of the working keys: Conduct percussion inspection and feeler gauge inspection on the working keys until the detection is qualified. Step 5. Install the rudder stock nut and conduct contact inspection: After assembling the tapered surface of the rudder stock and the tapered hole of the rotor, use a wrench to install the nut at the end of the tapered surface of the rudder stock, and check the contact surface between the nut and the servo motor rotor until the detection is qualified. Step 6. Three-party acceptance: After all the above inspection work is completed, it shall be accepted by the shipowner and the ship surveyor.

2. The method for vertically connecting a ship's steering gear and rudder stock according to claim 1, characterized in that: In the positioning and leveling of the servo motor rotor in Step 1, the error of leveling with a spirit level shall not exceed 0.15 mm / M; in the grinding and fitting of the tapered surface of the rudder stock and the tapered hole of the rotor in Step 2, the axial tightening amount Q between the tapered surface of the rudder stock and the tapered hole of the rotor shall not be less than 25 mm for the detection to be qualified.

3. The vertical coupling method for ship steering gear and rudder stock according to claim 1, characterized in that: In the grinding and fitting of the tapered surface of the rudder stock and the tapered hole of the rotor in Step 2, the following requirements shall be met during the color smearing and grinding of the tapered hole of the rotor: a. The color smearing area of the tapered hole of the rotor shall reach 75%, and there shall be no less than 2 color points within an area of 25 x 25 mm. b. Use a feeler gauge to check the large and small ends of the tapered hole of the rotor. The 0.05 mm feeler gauge shall not be inserted within 90% of the circumference, but individual scattered parts are allowed; the insertion depth of the 0.10 mm feeler gauge shall not exceed 20 mm, the width shall not exceed 30 mm, and there shall be no more than two places at each end.

4. The method for vertically connecting a ship's steering gear and rudder stock according to claim 1, characterized in that: In the inspection of the assembly of the working keys in Step 4, the percussion inspection and feeler gauge inspection shall meet the following requirements: a. There shall be no suspended sound when percussing the bottom of the working key. b. Before inserting the working key into the tapered hole of the rotor, the 0.05 mm feeler gauge shall not be inserted within 95% of the length, but individual scattered parts are allowed; the insertion depth of the 0.05 mm feeler gauge shall not exceed 1 / 4 of the keyway depth. c. After inserting the working key into the tapered hole of the rotor, the 0.10 mm feeler gauge shall not be inserted within 95% of the length, the 0.15 mm feeler gauge shall not be inserted at all, but individual scattered parts are allowed; the insertion depth of the 0.10 mm feeler gauge shall not exceed 1 time of the keyway width. d. The clearance between the upper plane of the working key and the keyway shall be 0.30 - 0.50 mm.

5. The method for vertically connecting a ship's steering gear and rudder stock according to claim 1, characterized in that: In the installation of the rudder stock nut and the contact inspection in Step 5, the 0.05 mm feeler gauge shall not be inserted within 90% of the contact surface between the nut and the servo motor rotor, but the insertion depth and width of the 0.10 mm feeler gauge are not allowed to exceed 50 mm at individual places.

6. A method for vertically connecting a ship's steering gear and rudder stock, characterized in that, Fitting is carried out in the way that the servo motor is at the top and the rudder stock is at the bottom, including the following steps: Step 1. Position and level the rudder stock: Lay steel plates in the static balance pit, fix the flange of the rudder stock on the steel plates, support it firmly with steel pipes around, and level the shaft head with a level. Step 2. Grind and fit the conical part of the rudder stock with the conical hole of the rotor: Use a hoist to lift the rudder machine rotor horizontally and make the large end of its conical hole face down. Install two symmetrically distributed temporary keys on the conical part of the rudder stock, and use the temporary keys to perform color grinding on the conical hole of the rotor. Detect the axial tightening amount Q between the conical part of the rudder stock and the conical hole of the rotor until the detection is qualified. Step 3. Fit keys for the conical part of the rudder stock: Remove the two temporary keys and grind and fit new practical keys according to their sizes. Install two new practical keys on the conical part of the rudder stock. Step 4. Inspect the assembly of the practical keys: Conduct percussion inspection and feeler gauge inspection on the practical keys until the detection is qualified. Step 5. Install the rudder stock nut and conduct contact inspection: After assembling the conical part of the rudder stock and the conical hole of the rotor, use a wrench to install the nut at the end of the conical part of the rudder stock, and check the contact surface between the nut and the rudder machine rotor until the detection is qualified. Step 6. Three-party acceptance: After all the above inspection work is completed, it shall be accepted by the shipowner and the ship surveyor.

7. The method for vertically connecting a ship's steering gear and rudder stock according to claim 6, characterized in that: In the positioning and leveling of the rudder stock in Step 1, the error of leveling with a level shall not exceed 0.15 mm / M; in the grinding and fitting of the conical part of the rudder stock with the conical hole of the rotor in Step 2, the axial tightening amount Q between the conical part of the rudder stock and the conical hole of the rotor shall not be less than 25 mm for the detection to be qualified.

8. The method for vertically connecting a ship's steering gear and rudder stock according to claim 6, characterized in that: In the grinding and fitting of the conical part of the rudder stock with the conical hole of the rotor in Step 2, the following requirements shall be met during the color grinding of the conical hole of the rotor: a. The colored area of the conical hole of the rotor shall reach 75%, and there shall be no less than 2 color points within an area of 25 x 25 mm. b. Use a feeler gauge to check the large and small ends of the conical hole of the rotor. The 0.05 mm feeler gauge shall not be inserted within 90% of the circumference, but individual scattered parts are allowed; the insertion depth of the .10 mm feeler gauge shall not exceed 20 mm, the width shall not exceed 30 mm, and there shall be no more than two places at each end.

9. The method for vertically connecting a ship's steering gear and rudder stock according to claim 6, characterized in that: In the inspection of the assembly of the practical keys in Step 4, the percussion inspection and feeler gauge inspection shall meet the following requirements: a. There shall be no suspended sound when percussing the bottom of the practical key. b. Before inserting the practical key into the conical hole of the rotor, the 0.05 mm feeler gauge shall not be inserted within 95% of the length, but individual scattered parts are allowed; the insertion depth of the 0.05 mm feeler gauge shall not exceed 1 / 4 of the keyway depth. c. After inserting the practical key into the conical hole of the rotor, the 0.10 mm feeler gauge shall not be inserted within 95% of the length, the 0.15 mm feeler gauge shall not be inserted at all, but individual scattered parts are allowed; the insertion depth of the 0.10 mm feeler gauge shall not exceed 1 time of the keyway width. d. The clearance between the upper plane of the practical key and the keyway shall be 0.30 - 0.50 mm.

10. The method for vertically connecting a ship's steering gear and rudder stock according to claim 6, characterized in that: In the installation of the rudder stock nut and the contact inspection in Step 5, the 0.05 mm feeler gauge shall not be inserted within 90% of the contact surface between the nut and the rudder machine rotor, but individual places where the insertion depth and width of the 0.10 mm feeler gauge do not exceed 50 mm are allowed.

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